/* DWARF 2 debugging format support for GDB.
- Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
- Free Software Foundation, Inc.
+
+ Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+ 2004, 2005, 2006, 2007, 2008, 2009
+ Free Software Foundation, Inc.
Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
Inc. with support from Florida State University (under contract
with the Ada Joint Program Office), and Silicon Graphics, Inc.
Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
based on Fred Fish's (Cygnus Support) implementation of DWARF 1
- support in dwarfread.c
+ support.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or (at
- your option) any later version.
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "bfd.h"
#include "symtab.h"
#include "gdbtypes.h"
-#include "symfile.h"
#include "objfiles.h"
-#include "elf/dwarf2.h"
+#include "dwarf2.h"
#include "buildsym.h"
#include "demangle.h"
#include "expression.h"
#include "filenames.h" /* for DOSish file names */
-
+#include "macrotab.h"
#include "language.h"
#include "complaints.h"
#include "bcache.h"
+#include "dwarf2expr.h"
+#include "dwarf2loc.h"
+#include "cp-support.h"
+#include "hashtab.h"
+#include "command.h"
+#include "gdbcmd.h"
+#include "block.h"
+#include "addrmap.h"
+
#include <fcntl.h>
#include "gdb_string.h"
#include "gdb_assert.h"
#include <sys/types.h>
-
-#ifndef DWARF2_REG_TO_REGNUM
-#define DWARF2_REG_TO_REGNUM(REG) (REG)
+#ifdef HAVE_ZLIB_H
+#include <zlib.h>
+#endif
+#ifdef HAVE_MMAP
+#include <sys/mman.h>
+#ifndef MAP_FAILED
+#define MAP_FAILED ((void *) -1)
+#endif
#endif
#if 0
}
_STATEMENT_PROLOGUE;
-/* offsets and sizes of debugging sections */
-
-static file_ptr dwarf_info_offset;
-static file_ptr dwarf_abbrev_offset;
-static file_ptr dwarf_line_offset;
-static file_ptr dwarf_pubnames_offset;
-static file_ptr dwarf_aranges_offset;
-static file_ptr dwarf_loc_offset;
-static file_ptr dwarf_macinfo_offset;
-static file_ptr dwarf_str_offset;
-file_ptr dwarf_frame_offset;
-file_ptr dwarf_eh_frame_offset;
-
-static unsigned int dwarf_info_size;
-static unsigned int dwarf_abbrev_size;
-static unsigned int dwarf_line_size;
-static unsigned int dwarf_pubnames_size;
-static unsigned int dwarf_aranges_size;
-static unsigned int dwarf_loc_size;
-static unsigned int dwarf_macinfo_size;
-static unsigned int dwarf_str_size;
-unsigned int dwarf_frame_size;
-unsigned int dwarf_eh_frame_size;
+/* When non-zero, dump DIEs after they are read in. */
+static int dwarf2_die_debug = 0;
+
+static int pagesize;
+
+/* When set, the file that we're processing is known to have debugging
+ info for C++ namespaces. GCC 3.3.x did not produce this information,
+ but later versions do. */
+
+static int processing_has_namespace_info;
+
+static const struct objfile_data *dwarf2_objfile_data_key;
+
+struct dwarf2_section_info
+{
+ asection *asection;
+ gdb_byte *buffer;
+ bfd_size_type size;
+ int was_mmapped;
+};
+
+struct dwarf2_per_objfile
+{
+ struct dwarf2_section_info info;
+ struct dwarf2_section_info abbrev;
+ struct dwarf2_section_info line;
+ struct dwarf2_section_info pubnames;
+ struct dwarf2_section_info aranges;
+ struct dwarf2_section_info loc;
+ struct dwarf2_section_info macinfo;
+ struct dwarf2_section_info str;
+ struct dwarf2_section_info ranges;
+ struct dwarf2_section_info types;
+ struct dwarf2_section_info frame;
+ struct dwarf2_section_info eh_frame;
+
+ /* A list of all the compilation units. This is used to locate
+ the target compilation unit of a particular reference. */
+ struct dwarf2_per_cu_data **all_comp_units;
+
+ /* The number of compilation units in ALL_COMP_UNITS. */
+ int n_comp_units;
+
+ /* A chain of compilation units that are currently read in, so that
+ they can be freed later. */
+ struct dwarf2_per_cu_data *read_in_chain;
+
+ /* A table mapping .debug_types signatures to its signatured_type entry.
+ This is NULL if the .debug_types section hasn't been read in yet. */
+ htab_t signatured_types;
+
+ /* A flag indicating wether this objfile has a section loaded at a
+ VMA of 0. */
+ int has_section_at_zero;
+};
+
+static struct dwarf2_per_objfile *dwarf2_per_objfile;
/* names of the debugging sections */
-#define INFO_SECTION ".debug_info"
-#define ABBREV_SECTION ".debug_abbrev"
-#define LINE_SECTION ".debug_line"
-#define PUBNAMES_SECTION ".debug_pubnames"
-#define ARANGES_SECTION ".debug_aranges"
-#define LOC_SECTION ".debug_loc"
-#define MACINFO_SECTION ".debug_macinfo"
-#define STR_SECTION ".debug_str"
-#define FRAME_SECTION ".debug_frame"
-#define EH_FRAME_SECTION ".eh_frame"
+/* Note that if the debugging section has been compressed, it might
+ have a name like .zdebug_info. */
+
+#define INFO_SECTION "debug_info"
+#define ABBREV_SECTION "debug_abbrev"
+#define LINE_SECTION "debug_line"
+#define PUBNAMES_SECTION "debug_pubnames"
+#define ARANGES_SECTION "debug_aranges"
+#define LOC_SECTION "debug_loc"
+#define MACINFO_SECTION "debug_macinfo"
+#define STR_SECTION "debug_str"
+#define RANGES_SECTION "debug_ranges"
+#define TYPES_SECTION "debug_types"
+#define FRAME_SECTION "debug_frame"
+#define EH_FRAME_SECTION "eh_frame"
/* local data types */
+/* We hold several abbreviation tables in memory at the same time. */
+#ifndef ABBREV_HASH_SIZE
+#define ABBREV_HASH_SIZE 121
+#endif
+
/* The data in a compilation unit header, after target2host
translation, looks like this. */
struct comp_unit_head
- {
- unsigned long length;
- short version;
- unsigned int abbrev_offset;
- unsigned char addr_size;
- unsigned char signed_addr_p;
- unsigned int offset_size; /* size of file offsets; either 4 or 8 */
- unsigned int initial_length_size; /* size of the length field; either
- 4 or 12 */
- };
+{
+ unsigned int length;
+ short version;
+ unsigned char addr_size;
+ unsigned char signed_addr_p;
+ unsigned int abbrev_offset;
+
+ /* Size of file offsets; either 4 or 8. */
+ unsigned int offset_size;
+
+ /* Size of the length field; either 4 or 12. */
+ unsigned int initial_length_size;
+
+ /* Offset to the first byte of this compilation unit header in the
+ .debug_info section, for resolving relative reference dies. */
+ unsigned int offset;
+
+ /* Offset to first die in this cu from the start of the cu.
+ This will be the first byte following the compilation unit header. */
+ unsigned int first_die_offset;
+};
+
+/* Internal state when decoding a particular compilation unit. */
+struct dwarf2_cu
+{
+ /* The objfile containing this compilation unit. */
+ struct objfile *objfile;
+
+ /* The header of the compilation unit. */
+ struct comp_unit_head header;
+
+ /* Base address of this compilation unit. */
+ CORE_ADDR base_address;
+
+ /* Non-zero if base_address has been set. */
+ int base_known;
+
+ struct function_range *first_fn, *last_fn, *cached_fn;
+
+ /* The language we are debugging. */
+ enum language language;
+ const struct language_defn *language_defn;
+
+ const char *producer;
+
+ /* The generic symbol table building routines have separate lists for
+ file scope symbols and all all other scopes (local scopes). So
+ we need to select the right one to pass to add_symbol_to_list().
+ We do it by keeping a pointer to the correct list in list_in_scope.
+
+ FIXME: The original dwarf code just treated the file scope as the
+ first local scope, and all other local scopes as nested local
+ scopes, and worked fine. Check to see if we really need to
+ distinguish these in buildsym.c. */
+ struct pending **list_in_scope;
+
+ /* DWARF abbreviation table associated with this compilation unit. */
+ struct abbrev_info **dwarf2_abbrevs;
+
+ /* Storage for the abbrev table. */
+ struct obstack abbrev_obstack;
+
+ /* Hash table holding all the loaded partial DIEs. */
+ htab_t partial_dies;
+
+ /* Storage for things with the same lifetime as this read-in compilation
+ unit, including partial DIEs. */
+ struct obstack comp_unit_obstack;
+
+ /* When multiple dwarf2_cu structures are living in memory, this field
+ chains them all together, so that they can be released efficiently.
+ We will probably also want a generation counter so that most-recently-used
+ compilation units are cached... */
+ struct dwarf2_per_cu_data *read_in_chain;
+
+ /* Backchain to our per_cu entry if the tree has been built. */
+ struct dwarf2_per_cu_data *per_cu;
+
+ /* Pointer to the die -> type map. Although it is stored
+ permanently in per_cu, we copy it here to avoid double
+ indirection. */
+ htab_t type_hash;
+
+ /* How many compilation units ago was this CU last referenced? */
+ int last_used;
+
+ /* A hash table of die offsets for following references. */
+ htab_t die_hash;
+
+ /* Full DIEs if read in. */
+ struct die_info *dies;
+
+ /* A set of pointers to dwarf2_per_cu_data objects for compilation
+ units referenced by this one. Only set during full symbol processing;
+ partial symbol tables do not have dependencies. */
+ htab_t dependencies;
+
+ /* Header data from the line table, during full symbol processing. */
+ struct line_header *line_header;
+
+ /* Mark used when releasing cached dies. */
+ unsigned int mark : 1;
+
+ /* This flag will be set if this compilation unit might include
+ inter-compilation-unit references. */
+ unsigned int has_form_ref_addr : 1;
+
+ /* This flag will be set if this compilation unit includes any
+ DW_TAG_namespace DIEs. If we know that there are explicit
+ DIEs for namespaces, we don't need to try to infer them
+ from mangled names. */
+ unsigned int has_namespace_info : 1;
+};
+
+/* Persistent data held for a compilation unit, even when not
+ processing it. We put a pointer to this structure in the
+ read_symtab_private field of the psymtab. If we encounter
+ inter-compilation-unit references, we also maintain a sorted
+ list of all compilation units. */
+
+struct dwarf2_per_cu_data
+{
+ /* The start offset and length of this compilation unit. 2**29-1
+ bytes should suffice to store the length of any compilation unit
+ - if it doesn't, GDB will fall over anyway.
+ NOTE: Unlike comp_unit_head.length, this length includes
+ initial_length_size. */
+ unsigned int offset;
+ unsigned int length : 29;
+
+ /* Flag indicating this compilation unit will be read in before
+ any of the current compilation units are processed. */
+ unsigned int queued : 1;
+
+ /* This flag will be set if we need to load absolutely all DIEs
+ for this compilation unit, instead of just the ones we think
+ are interesting. It gets set if we look for a DIE in the
+ hash table and don't find it. */
+ unsigned int load_all_dies : 1;
+
+ /* Non-zero if this CU is from .debug_types.
+ Otherwise it's from .debug_info. */
+ unsigned int from_debug_types : 1;
+
+ /* Set iff currently read in. */
+ struct dwarf2_cu *cu;
+
+ /* If full symbols for this CU have been read in, then this field
+ holds a map of DIE offsets to types. It isn't always possible
+ to reconstruct this information later, so we have to preserve
+ it. */
+ htab_t type_hash;
+
+ /* The partial symbol table associated with this compilation unit,
+ or NULL for partial units (which do not have an associated
+ symtab). */
+ struct partial_symtab *psymtab;
+};
+
+/* Entry in the signatured_types hash table. */
+
+struct signatured_type
+{
+ ULONGEST signature;
-/* The data in the .debug_line statement prologue looks like this. */
-struct line_head
+ /* Offset in .debug_types of the TU (type_unit) for this type. */
+ unsigned int offset;
+
+ /* Offset in .debug_types of the type defined by this TU. */
+ unsigned int type_offset;
+
+ /* The CU(/TU) of this type. */
+ struct dwarf2_per_cu_data per_cu;
+};
+
+/* Struct used to pass misc. parameters to read_die_and_children, et. al.
+ which are used for both .debug_info and .debug_types dies.
+ All parameters here are unchanging for the life of the call.
+ This struct exists to abstract away the constant parameters of
+ die reading. */
+
+struct die_reader_specs
+{
+ /* The bfd of this objfile. */
+ bfd* abfd;
+
+ /* The CU of the DIE we are parsing. */
+ struct dwarf2_cu *cu;
+
+ /* Pointer to start of section buffer.
+ This is either the start of .debug_info or .debug_types. */
+ const gdb_byte *buffer;
+};
+
+/* The line number information for a compilation unit (found in the
+ .debug_line section) begins with a "statement program header",
+ which contains the following information. */
+struct line_header
+{
+ unsigned int total_length;
+ unsigned short version;
+ unsigned int header_length;
+ unsigned char minimum_instruction_length;
+ unsigned char default_is_stmt;
+ int line_base;
+ unsigned char line_range;
+ unsigned char opcode_base;
+
+ /* standard_opcode_lengths[i] is the number of operands for the
+ standard opcode whose value is i. This means that
+ standard_opcode_lengths[0] is unused, and the last meaningful
+ element is standard_opcode_lengths[opcode_base - 1]. */
+ unsigned char *standard_opcode_lengths;
+
+ /* The include_directories table. NOTE! These strings are not
+ allocated with xmalloc; instead, they are pointers into
+ debug_line_buffer. If you try to free them, `free' will get
+ indigestion. */
+ unsigned int num_include_dirs, include_dirs_size;
+ char **include_dirs;
+
+ /* The file_names table. NOTE! These strings are not allocated
+ with xmalloc; instead, they are pointers into debug_line_buffer.
+ Don't try to free them directly. */
+ unsigned int num_file_names, file_names_size;
+ struct file_entry
{
- unsigned int total_length;
- unsigned short version;
- unsigned int prologue_length;
- unsigned char minimum_instruction_length;
- unsigned char default_is_stmt;
- int line_base;
- unsigned char line_range;
- unsigned char opcode_base;
- unsigned char *standard_opcode_lengths;
- };
+ char *name;
+ unsigned int dir_index;
+ unsigned int mod_time;
+ unsigned int length;
+ int included_p; /* Non-zero if referenced by the Line Number Program. */
+ struct symtab *symtab; /* The associated symbol table, if any. */
+ } *file_names;
+
+ /* The start and end of the statement program following this
+ header. These point into dwarf2_per_objfile->line_buffer. */
+ gdb_byte *statement_program_start, *statement_program_end;
+};
/* When we construct a partial symbol table entry we only
need this much information. */
struct partial_die_info
{
- enum dwarf_tag tag;
- unsigned char has_children;
- unsigned char is_external;
- unsigned char is_declaration;
- unsigned char has_type;
+ /* Offset of this DIE. */
unsigned int offset;
- unsigned int abbrev;
+
+ /* DWARF-2 tag for this DIE. */
+ ENUM_BITFIELD(dwarf_tag) tag : 16;
+
+ /* Assorted flags describing the data found in this DIE. */
+ unsigned int has_children : 1;
+ unsigned int is_external : 1;
+ unsigned int is_declaration : 1;
+ unsigned int has_type : 1;
+ unsigned int has_specification : 1;
+ unsigned int has_pc_info : 1;
+
+ /* Flag set if the SCOPE field of this structure has been
+ computed. */
+ unsigned int scope_set : 1;
+
+ /* Flag set if the DIE has a byte_size attribute. */
+ unsigned int has_byte_size : 1;
+
+ /* The name of this DIE. Normally the value of DW_AT_name, but
+ sometimes DW_TAG_MIPS_linkage_name or a string computed in some
+ other fashion. */
char *name;
- int has_pc_info;
+
+ /* The scope to prepend to our children. This is generally
+ allocated on the comp_unit_obstack, so will disappear
+ when this compilation unit leaves the cache. */
+ char *scope;
+
+ /* The location description associated with this DIE, if any. */
+ struct dwarf_block *locdesc;
+
+ /* If HAS_PC_INFO, the PC range associated with this DIE. */
CORE_ADDR lowpc;
CORE_ADDR highpc;
- struct dwarf_block *locdesc;
- unsigned int language;
- char *sibling;
+
+ /* Pointer into the info_buffer (or types_buffer) pointing at the target of
+ DW_AT_sibling, if any. */
+ gdb_byte *sibling;
+
+ /* If HAS_SPECIFICATION, the offset of the DIE referred to by
+ DW_AT_specification (or DW_AT_abstract_origin or
+ DW_AT_extension). */
+ unsigned int spec_offset;
+
+ /* Pointers to this DIE's parent, first child, and next sibling,
+ if any. */
+ struct partial_die_info *die_parent, *die_child, *die_sibling;
};
/* This data structure holds the information of an abbrev. */
{
unsigned int number; /* number identifying abbrev */
enum dwarf_tag tag; /* dwarf tag */
- int has_children; /* boolean */
- unsigned int num_attrs; /* number of attributes */
+ unsigned short has_children; /* boolean */
+ unsigned short num_attrs; /* number of attributes */
struct attr_abbrev *attrs; /* an array of attribute descriptions */
struct abbrev_info *next; /* next in chain */
};
struct attr_abbrev
{
- enum dwarf_attribute name;
- enum dwarf_form form;
- };
-
-/* This data structure holds a complete die structure. */
-struct die_info
- {
- enum dwarf_tag tag; /* Tag indicating type of die */
- unsigned short has_children; /* Does the die have children */
- unsigned int abbrev; /* Abbrev number */
- unsigned int offset; /* Offset in .debug_info section */
- unsigned int num_attrs; /* Number of attributes */
- struct attribute *attrs; /* An array of attributes */
- struct die_info *next_ref; /* Next die in ref hash table */
- struct die_info *next; /* Next die in linked list */
- struct type *type; /* Cached type information */
+ ENUM_BITFIELD(dwarf_attribute) name : 16;
+ ENUM_BITFIELD(dwarf_form) form : 16;
};
/* Attributes have a name and a value */
struct attribute
{
- enum dwarf_attribute name;
- enum dwarf_form form;
+ ENUM_BITFIELD(dwarf_attribute) name : 16;
+ ENUM_BITFIELD(dwarf_form) form : 15;
+
+ /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
+ field should be in u.str (existing only for DW_STRING) but it is kept
+ here for better struct attribute alignment. */
+ unsigned int string_is_canonical : 1;
+
union
{
char *str;
struct dwarf_block *blk;
- unsigned long unsnd;
- long int snd;
+ ULONGEST unsnd;
+ LONGEST snd;
CORE_ADDR addr;
+ struct signatured_type *signatured_type;
}
u;
};
+/* This data structure holds a complete die structure. */
+struct die_info
+ {
+ /* DWARF-2 tag for this DIE. */
+ ENUM_BITFIELD(dwarf_tag) tag : 16;
+
+ /* Number of attributes */
+ unsigned short num_attrs;
+
+ /* Abbrev number */
+ unsigned int abbrev;
+
+ /* Offset in .debug_info or .debug_types section. */
+ unsigned int offset;
+
+ /* The dies in a compilation unit form an n-ary tree. PARENT
+ points to this die's parent; CHILD points to the first child of
+ this node; and all the children of a given node are chained
+ together via their SIBLING fields, terminated by a die whose
+ tag is zero. */
+ struct die_info *child; /* Its first child, if any. */
+ struct die_info *sibling; /* Its next sibling, if any. */
+ struct die_info *parent; /* Its parent, if any. */
+
+ /* An array of attributes, with NUM_ATTRS elements. There may be
+ zero, but it's not common and zero-sized arrays are not
+ sufficiently portable C. */
+ struct attribute attrs[1];
+ };
+
+struct function_range
+{
+ const char *name;
+ CORE_ADDR lowpc, highpc;
+ int seen_line;
+ struct function_range *next;
+};
+
/* Get at parts of an attribute structure */
#define DW_STRING(attr) ((attr)->u.str)
+#define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
#define DW_UNSND(attr) ((attr)->u.unsnd)
#define DW_BLOCK(attr) ((attr)->u.blk)
#define DW_SND(attr) ((attr)->u.snd)
#define DW_ADDR(attr) ((attr)->u.addr)
+#define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
/* Blocks are a bunch of untyped bytes. */
struct dwarf_block
{
unsigned int size;
- char *data;
+ gdb_byte *data;
};
-/* We only hold one compilation unit's abbrevs in
- memory at any one time. */
-#ifndef ABBREV_HASH_SIZE
-#define ABBREV_HASH_SIZE 121
-#endif
#ifndef ATTR_ALLOC_CHUNK
#define ATTR_ALLOC_CHUNK 4
#endif
-static struct abbrev_info *dwarf2_abbrevs[ABBREV_HASH_SIZE];
-
-/* A hash table of die offsets for following references. */
-#ifndef REF_HASH_SIZE
-#define REF_HASH_SIZE 1021
-#endif
-
-static struct die_info *die_ref_table[REF_HASH_SIZE];
-
-/* Obstack for allocating temporary storage used during symbol reading. */
-static struct obstack dwarf2_tmp_obstack;
-
-/* Offset to the first byte of the current compilation unit header,
- for resolving relative reference dies. */
-static unsigned int cu_header_offset;
-
/* Allocate fields for structs, unions and enums in this size. */
#ifndef DW_FIELD_ALLOC_CHUNK
#define DW_FIELD_ALLOC_CHUNK 4
#endif
-/* The language we are debugging. */
-static enum language cu_language;
-static const struct language_defn *cu_language_defn;
-
-/* Actually data from the sections. */
-static char *dwarf_info_buffer;
-static char *dwarf_abbrev_buffer;
-static char *dwarf_line_buffer;
-static char *dwarf_str_buffer;
-
/* A zeroed version of a partial die for initialization purposes. */
static struct partial_die_info zeroed_partial_die;
-/* The generic symbol table building routines have separate lists for
- file scope symbols and all all other scopes (local scopes). So
- we need to select the right one to pass to add_symbol_to_list().
- We do it by keeping a pointer to the correct list in list_in_scope.
-
- FIXME: The original dwarf code just treated the file scope as the first
- local scope, and all other local scopes as nested local scopes, and worked
- fine. Check to see if we really need to distinguish these
- in buildsym.c. */
-static struct pending **list_in_scope = &file_symbols;
-
-/* FIXME: decode_locdesc sets these variables to describe the location
- to the caller. These ought to be a structure or something. If
- none of the flags are set, the object lives at the address returned
- by decode_locdesc. */
-
-static int optimized_out; /* No ops in location in expression,
- so object was optimized out. */
-static int isreg; /* Object lives in register.
- decode_locdesc's return value is
- the register number. */
-static int offreg; /* Object's address is the sum of the
- register specified by basereg, plus
- the offset returned. */
-static int basereg; /* See `offreg'. */
-static int isderef; /* Value described by flags above is
- the address of a pointer to the object. */
-static int islocal; /* Variable is at the returned offset
- from the frame start, but there's
- no identified frame pointer for
- this function, so we can't say
- which register it's relative to;
- use LOC_LOCAL. */
-
-/* DW_AT_frame_base values for the current function.
- frame_base_reg is -1 if DW_AT_frame_base is missing, otherwise it
- contains the register number for the frame register.
- frame_base_offset is the offset from the frame register to the
- virtual stack frame. */
-static int frame_base_reg;
-static CORE_ADDR frame_base_offset;
-
-/* This value is added to each symbol value. FIXME: Generalize to
- the section_offsets structure used by dbxread (once this is done,
- pass the appropriate section number to end_symtab). */
-static CORE_ADDR baseaddr; /* Add to each symbol value */
-
-/* We put a pointer to this structure in the read_symtab_private field
- of the psymtab.
- The complete dwarf information for an objfile is kept in the
- psymbol_obstack, so that absolute die references can be handled.
- Most of the information in this structure is related to an entire
- object file and could be passed via the sym_private field of the objfile.
- It is however conceivable that dwarf2 might not be the only type
- of symbols read from an object file. */
-
-struct dwarf2_pinfo
- {
- /* Pointer to start of dwarf info buffer for the objfile. */
-
- char *dwarf_info_buffer;
-
- /* Offset in dwarf_info_buffer for this compilation unit. */
-
- unsigned long dwarf_info_offset;
-
- /* Pointer to start of dwarf abbreviation buffer for the objfile. */
-
- char *dwarf_abbrev_buffer;
-
- /* Size of dwarf abbreviation section for the objfile. */
-
- unsigned int dwarf_abbrev_size;
-
- /* Pointer to start of dwarf line buffer for the objfile. */
-
- char *dwarf_line_buffer;
-
- /* Pointer to start of dwarf string buffer for the objfile. */
-
- char *dwarf_str_buffer;
-
- /* Size of dwarf string section for the objfile. */
-
- unsigned int dwarf_str_size;
- };
-
-#define PST_PRIVATE(p) ((struct dwarf2_pinfo *)(p)->read_symtab_private)
-#define DWARF_INFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_info_buffer)
-#define DWARF_INFO_OFFSET(p) (PST_PRIVATE(p)->dwarf_info_offset)
-#define DWARF_ABBREV_BUFFER(p) (PST_PRIVATE(p)->dwarf_abbrev_buffer)
-#define DWARF_ABBREV_SIZE(p) (PST_PRIVATE(p)->dwarf_abbrev_size)
-#define DWARF_LINE_BUFFER(p) (PST_PRIVATE(p)->dwarf_line_buffer)
-#define DWARF_STR_BUFFER(p) (PST_PRIVATE(p)->dwarf_str_buffer)
-#define DWARF_STR_SIZE(p) (PST_PRIVATE(p)->dwarf_str_size)
-
-/* Maintain an array of referenced fundamental types for the current
- compilation unit being read. For DWARF version 1, we have to construct
- the fundamental types on the fly, since no information about the
- fundamental types is supplied. Each such fundamental type is created by
- calling a language dependent routine to create the type, and then a
- pointer to that type is then placed in the array at the index specified
- by it's FT_<TYPENAME> value. The array has a fixed size set by the
- FT_NUM_MEMBERS compile time constant, which is the number of predefined
- fundamental types gdb knows how to construct. */
-static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */
-
/* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
but this would require a corresponding change in unpack_field_as_long
and friends. */
int virtuality;
struct field field;
}
- *fields;
+ *fields, *baseclasses;
- /* Number of fields. */
+ /* Number of fields (including baseclasses). */
int nfields;
/* Number of baseclasses. */
int nfnfields;
};
-/* Various complaints about symbol reading that don't abort the process */
-
-static struct complaint dwarf2_const_ignored =
-{
- "type qualifier 'const' ignored", 0, 0
-};
-static struct complaint dwarf2_volatile_ignored =
-{
- "type qualifier 'volatile' ignored", 0, 0
-};
-static struct complaint dwarf2_non_const_array_bound_ignored =
-{
- "non-constant array bounds form '%s' ignored", 0, 0
-};
-static struct complaint dwarf2_missing_line_number_section =
-{
- "missing .debug_line section", 0, 0
-};
-static struct complaint dwarf2_mangled_line_number_section =
-{
- "mangled .debug_line section", 0, 0
-};
-static struct complaint dwarf2_unsupported_die_ref_attr =
-{
- "unsupported die ref attribute form: '%s'", 0, 0
-};
-static struct complaint dwarf2_unsupported_stack_op =
-{
- "unsupported stack op: '%s'", 0, 0
-};
-static struct complaint dwarf2_complex_location_expr =
+/* One item on the queue of compilation units to read in full symbols
+ for. */
+struct dwarf2_queue_item
{
- "location expression too complex", 0, 0
+ struct dwarf2_per_cu_data *per_cu;
+ struct dwarf2_queue_item *next;
};
-static struct complaint dwarf2_unsupported_tag =
-{
- "unsupported tag: '%s'", 0, 0
-};
-static struct complaint dwarf2_unsupported_at_encoding =
-{
- "unsupported DW_AT_encoding: '%s'", 0, 0
-};
-static struct complaint dwarf2_unsupported_at_frame_base =
-{
- "unsupported DW_AT_frame_base for function '%s'", 0, 0
-};
-static struct complaint dwarf2_unexpected_tag =
-{
- "unexepected tag in read_type_die: '%s'", 0, 0
-};
-static struct complaint dwarf2_missing_at_frame_base =
+
+/* The current queue. */
+static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
+
+/* Loaded secondary compilation units are kept in memory until they
+ have not been referenced for the processing of this many
+ compilation units. Set this to zero to disable caching. Cache
+ sizes of up to at least twenty will improve startup time for
+ typical inter-CU-reference binaries, at an obvious memory cost. */
+static int dwarf2_max_cache_age = 5;
+static void
+show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
{
- "DW_AT_frame_base missing for DW_OP_fbreg", 0, 0
-};
-static struct complaint dwarf2_bad_static_member_name =
+ fprintf_filtered (file, _("\
+The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
+ value);
+}
+
+
+/* Various complaints about symbol reading that don't abort the process */
+
+static void
+dwarf2_statement_list_fits_in_line_number_section_complaint (void)
{
- "unrecognized static data member name '%s'", 0, 0
-};
-static struct complaint dwarf2_unsupported_accessibility =
+ complaint (&symfile_complaints,
+ _("statement list doesn't fit in .debug_line section"));
+}
+
+static void
+dwarf2_debug_line_missing_file_complaint (void)
{
- "unsupported accessibility %d", 0, 0
-};
-static struct complaint dwarf2_bad_member_name_complaint =
+ complaint (&symfile_complaints,
+ _(".debug_line section has line data without a file"));
+}
+
+static void
+dwarf2_debug_line_missing_end_sequence_complaint (void)
{
- "cannot extract member name from '%s'", 0, 0
-};
-static struct complaint dwarf2_missing_member_fn_type_complaint =
+ complaint (&symfile_complaints,
+ _(".debug_line section has line program sequence without an end"));
+}
+
+static void
+dwarf2_complex_location_expr_complaint (void)
{
- "member function type missing for '%s'", 0, 0
-};
-static struct complaint dwarf2_vtbl_not_found_complaint =
+ complaint (&symfile_complaints, _("location expression too complex"));
+}
+
+static void
+dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
+ int arg3)
{
- "virtual function table pointer not found when defining class '%s'", 0, 0
-};
-static struct complaint dwarf2_absolute_sibling_complaint =
+ complaint (&symfile_complaints,
+ _("const value length mismatch for '%s', got %d, expected %d"), arg1,
+ arg2, arg3);
+}
+
+static void
+dwarf2_macros_too_long_complaint (void)
{
- "ignoring absolute DW_AT_sibling", 0, 0
-};
-static struct complaint dwarf2_const_value_length_mismatch =
+ complaint (&symfile_complaints,
+ _("macro info runs off end of `.debug_macinfo' section"));
+}
+
+static void
+dwarf2_macro_malformed_definition_complaint (const char *arg1)
{
- "const value length mismatch for '%s', got %d, expected %d", 0, 0
-};
-static struct complaint dwarf2_unsupported_const_value_attr =
+ complaint (&symfile_complaints,
+ _("macro debug info contains a malformed macro definition:\n`%s'"),
+ arg1);
+}
+
+static void
+dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
{
- "unsupported const value attribute form: '%s'", 0, 0
-};
+ complaint (&symfile_complaints,
+ _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
+}
/* local function prototypes */
-static void dwarf2_locate_sections (bfd *, asection *, PTR);
+static void dwarf2_locate_sections (bfd *, asection *, void *);
#if 0
-static void dwarf2_build_psymtabs_easy (struct objfile *, int);
+static void dwarf2_build_psymtabs_easy (struct objfile *);
#endif
-static void dwarf2_build_psymtabs_hard (struct objfile *, int);
+static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
+ struct objfile *);
-static char *scan_partial_symbols (char *, struct objfile *,
- CORE_ADDR *, CORE_ADDR *,
- const struct comp_unit_head *);
+static void dwarf2_build_include_psymtabs (struct dwarf2_cu *,
+ struct die_info *,
+ struct partial_symtab *);
-static void add_partial_symbol (struct partial_die_info *, struct objfile *,
- const struct comp_unit_head *);
+static void dwarf2_build_psymtabs_hard (struct objfile *);
+
+static void scan_partial_symbols (struct partial_die_info *,
+ CORE_ADDR *, CORE_ADDR *,
+ int, struct dwarf2_cu *);
+
+static void add_partial_symbol (struct partial_die_info *,
+ struct dwarf2_cu *);
+
+static int pdi_needs_namespace (enum dwarf_tag tag);
+
+static void add_partial_namespace (struct partial_die_info *pdi,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ int need_pc, struct dwarf2_cu *cu);
+
+static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
+ CORE_ADDR *highpc, int need_pc,
+ struct dwarf2_cu *cu);
+
+static void add_partial_enumeration (struct partial_die_info *enum_pdi,
+ struct dwarf2_cu *cu);
+
+static void add_partial_subprogram (struct partial_die_info *pdi,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ int need_pc, struct dwarf2_cu *cu);
+
+static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
+ gdb_byte *buffer, gdb_byte *info_ptr,
+ bfd *abfd, struct dwarf2_cu *cu);
static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
static void psymtab_to_symtab_1 (struct partial_symtab *);
-char *dwarf2_read_section (struct objfile *, file_ptr, unsigned int);
+static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
+
+static void dwarf2_free_abbrev_table (void *);
+
+static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
+ struct dwarf2_cu *);
+
+static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
+ struct dwarf2_cu *);
+
+static struct partial_die_info *load_partial_dies (bfd *,
+ gdb_byte *, gdb_byte *,
+ int, struct dwarf2_cu *);
+
+static gdb_byte *read_partial_die (struct partial_die_info *,
+ struct abbrev_info *abbrev,
+ unsigned int, bfd *,
+ gdb_byte *, gdb_byte *,
+ struct dwarf2_cu *);
+
+static struct partial_die_info *find_partial_die (unsigned int,
+ struct dwarf2_cu *);
+
+static void fixup_partial_die (struct partial_die_info *,
+ struct dwarf2_cu *);
+
+static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
+ bfd *, gdb_byte *, struct dwarf2_cu *);
-static void dwarf2_read_abbrevs (bfd *, unsigned int);
+static gdb_byte *read_attribute_value (struct attribute *, unsigned,
+ bfd *, gdb_byte *, struct dwarf2_cu *);
-static void dwarf2_empty_abbrev_table (PTR);
+static unsigned int read_1_byte (bfd *, gdb_byte *);
-static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int);
+static int read_1_signed_byte (bfd *, gdb_byte *);
-static char *read_partial_die (struct partial_die_info *,
- bfd *, char *,
- const struct comp_unit_head *);
+static unsigned int read_2_bytes (bfd *, gdb_byte *);
-static char *read_full_die (struct die_info **, bfd *, char *,
- const struct comp_unit_head *);
+static unsigned int read_4_bytes (bfd *, gdb_byte *);
-static char *read_attribute (struct attribute *, struct attr_abbrev *,
- bfd *, char *, const struct comp_unit_head *);
+static ULONGEST read_8_bytes (bfd *, gdb_byte *);
-static char *read_attribute_value (struct attribute *, unsigned,
- bfd *, char *, const struct comp_unit_head *);
+static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
+ unsigned int *);
-static unsigned int read_1_byte (bfd *, char *);
+static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
-static int read_1_signed_byte (bfd *, char *);
+static LONGEST read_checked_initial_length_and_offset
+ (bfd *, gdb_byte *, const struct comp_unit_head *,
+ unsigned int *, unsigned int *);
-static unsigned int read_2_bytes (bfd *, char *);
+static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
+ unsigned int *);
-static unsigned int read_4_bytes (bfd *, char *);
+static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
-static unsigned long read_8_bytes (bfd *, char *);
+static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
-static CORE_ADDR read_address (bfd *, char *ptr, const struct comp_unit_head *,
- int *bytes_read);
+static char *read_string (bfd *, gdb_byte *, unsigned int *);
-static LONGEST read_initial_length (bfd *, char *,
- struct comp_unit_head *, int *bytes_read);
+static char *read_indirect_string (bfd *, gdb_byte *,
+ const struct comp_unit_head *,
+ unsigned int *);
-static LONGEST read_offset (bfd *, char *, const struct comp_unit_head *,
- int *bytes_read);
+static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
-static char *read_n_bytes (bfd *, char *, unsigned int);
+static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
-static char *read_string (bfd *, char *, unsigned int *);
+static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
-static char *read_indirect_string (bfd *, char *, const struct comp_unit_head *,
- unsigned int *);
+static void set_cu_language (unsigned int, struct dwarf2_cu *);
-static unsigned long read_unsigned_leb128 (bfd *, char *, unsigned int *);
+static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
+ struct dwarf2_cu *);
-static long read_signed_leb128 (bfd *, char *, unsigned int *);
+static struct attribute *dwarf2_attr_no_follow (struct die_info *,
+ unsigned int,
+ struct dwarf2_cu *);
-static void set_cu_language (unsigned int);
+static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
+ struct dwarf2_cu *cu);
-static struct attribute *dwarf_attr (struct die_info *, unsigned int);
+static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
-static int die_is_declaration (struct die_info *);
+static struct die_info *die_specification (struct die_info *die,
+ struct dwarf2_cu **);
-static void dwarf_decode_lines (unsigned int, char *, bfd *,
- const struct comp_unit_head *);
+static void free_line_header (struct line_header *lh);
-static void dwarf2_start_subfile (char *, char *);
+static void add_file_name (struct line_header *, char *, unsigned int,
+ unsigned int, unsigned int);
+
+static struct line_header *(dwarf_decode_line_header
+ (unsigned int offset,
+ bfd *abfd, struct dwarf2_cu *cu));
+
+static void dwarf_decode_lines (struct line_header *, char *, bfd *,
+ struct dwarf2_cu *, struct partial_symtab *);
+
+static void dwarf2_start_subfile (char *, char *, char *);
static struct symbol *new_symbol (struct die_info *, struct type *,
- struct objfile *, const struct comp_unit_head *);
+ struct dwarf2_cu *);
static void dwarf2_const_value (struct attribute *, struct symbol *,
- struct objfile *, const struct comp_unit_head *);
+ struct dwarf2_cu *);
static void dwarf2_const_value_data (struct attribute *attr,
struct symbol *sym,
int bits);
-static struct type *die_type (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static struct type *die_type (struct die_info *, struct dwarf2_cu *);
-static struct type *die_containing_type (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static struct type *die_containing_type (struct die_info *,
+ struct dwarf2_cu *);
-#if 0
-static struct type *type_at_offset (unsigned int, struct objfile *);
-#endif
+static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
+
+static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
-static struct type *tag_type_to_type (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
-static void read_type_die (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static char *typename_concat (struct obstack *,
+ const char *prefix,
+ const char *suffix,
+ struct dwarf2_cu *);
-static void read_typedef (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static void read_file_scope (struct die_info *, struct dwarf2_cu *);
-static void read_base_type (struct die_info *, struct objfile *);
+static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
-static void read_file_scope (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static void read_func_scope (struct die_info *, struct dwarf2_cu *);
-static void read_func_scope (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
-static void read_lexical_block_scope (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
+ struct dwarf2_cu *, struct partial_symtab *);
static int dwarf2_get_pc_bounds (struct die_info *,
- CORE_ADDR *, CORE_ADDR *, struct objfile *);
+ CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
+ struct partial_symtab *);
+
+static void get_scope_pc_bounds (struct die_info *,
+ CORE_ADDR *, CORE_ADDR *,
+ struct dwarf2_cu *);
+
+static void dwarf2_record_block_ranges (struct die_info *, struct block *,
+ CORE_ADDR, struct dwarf2_cu *);
static void dwarf2_add_field (struct field_info *, struct die_info *,
- struct objfile *, const struct comp_unit_head *);
+ struct dwarf2_cu *);
static void dwarf2_attach_fields_to_type (struct field_info *,
- struct type *, struct objfile *);
+ struct type *, struct dwarf2_cu *);
static void dwarf2_add_member_fn (struct field_info *,
struct die_info *, struct type *,
- struct objfile *objfile,
- const struct comp_unit_head *);
+ struct dwarf2_cu *);
static void dwarf2_attach_fn_fields_to_type (struct field_info *,
- struct type *, struct objfile *);
+ struct type *, struct dwarf2_cu *);
-static void read_structure_scope (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
-static void read_common_block (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static const char *determine_class_name (struct die_info *die,
+ struct dwarf2_cu *cu);
-static void read_enumeration (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static void read_common_block (struct die_info *, struct dwarf2_cu *);
-static struct type *dwarf_base_type (int, int, struct objfile *);
+static void read_namespace (struct die_info *die, struct dwarf2_cu *);
-static CORE_ADDR decode_locdesc (struct dwarf_block *, struct objfile *,
- const struct comp_unit_head *);
+static void read_module (struct die_info *die, struct dwarf2_cu *cu);
-static void read_array_type (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
-static void read_tag_pointer_type (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static const char *namespace_name (struct die_info *die,
+ int *is_anonymous, struct dwarf2_cu *);
-static void read_tag_ptr_to_member_type (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
-static void read_tag_reference_type (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
-static void read_tag_const_type (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
+ struct dwarf2_cu *);
-static void read_tag_volatile_type (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static struct die_info *read_comp_unit (gdb_byte *, struct dwarf2_cu *);
-static void read_tag_string_type (struct die_info *, struct objfile *);
+static struct die_info *read_die_and_children_1 (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ gdb_byte **new_info_ptr,
+ struct die_info *parent);
-static void read_subroutine_type (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static struct die_info *read_die_and_children (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ gdb_byte **new_info_ptr,
+ struct die_info *parent);
-static struct die_info *read_comp_unit (char *, bfd *,
- const struct comp_unit_head *);
+static struct die_info *read_die_and_siblings (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ gdb_byte **new_info_ptr,
+ struct die_info *parent);
-static void free_die_list (struct die_info *);
+static gdb_byte *read_full_die (const struct die_reader_specs *reader,
+ struct die_info **, gdb_byte *,
+ int *);
-static struct cleanup *make_cleanup_free_die_list (struct die_info *);
+static void process_die (struct die_info *, struct dwarf2_cu *);
-static void process_die (struct die_info *, struct objfile *,
- const struct comp_unit_head *);
+static char *dwarf2_linkage_name (struct die_info *, struct dwarf2_cu *);
-static char *dwarf2_linkage_name (struct die_info *);
+static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *,
+ struct obstack *);
+
+static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
+
+static struct die_info *dwarf2_extension (struct die_info *die,
+ struct dwarf2_cu **);
static char *dwarf_tag_name (unsigned int);
#if 0
static char *dwarf_cfi_name (unsigned int);
-
-struct die_info *copy_die (struct die_info *);
#endif
static struct die_info *sibling_die (struct die_info *);
-static void dump_die (struct die_info *);
+static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
+
+static void dump_die_for_error (struct die_info *);
-static void dump_die_list (struct die_info *);
+static void dump_die_1 (struct ui_file *, int level, int max_level,
+ struct die_info *);
-static void store_in_ref_table (unsigned int, struct die_info *);
+/*static*/ void dump_die (struct die_info *, int max_level);
-static void dwarf2_empty_hash_tables (void);
+static void store_in_ref_table (struct die_info *,
+ struct dwarf2_cu *);
+
+static int is_ref_attr (struct attribute *);
static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
-static struct die_info *follow_die_ref (unsigned int);
+static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
+
+static struct die_info *follow_die_ref_or_sig (struct die_info *,
+ struct attribute *,
+ struct dwarf2_cu **);
+
+static struct die_info *follow_die_ref (struct die_info *,
+ struct attribute *,
+ struct dwarf2_cu **);
+
+static struct die_info *follow_die_sig (struct die_info *,
+ struct attribute *,
+ struct dwarf2_cu **);
-static struct type *dwarf2_fundamental_type (struct objfile *, int);
+static void read_signatured_type_at_offset (struct objfile *objfile,
+ unsigned int offset);
+
+static void read_signatured_type (struct objfile *,
+ struct signatured_type *type_sig);
/* memory allocation interface */
-static void dwarf2_free_tmp_obstack (PTR);
+static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
-static struct dwarf_block *dwarf_alloc_block (void);
+static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
-static struct abbrev_info *dwarf_alloc_abbrev (void);
+static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
-static struct die_info *dwarf_alloc_die (void);
+static void initialize_cu_func_list (struct dwarf2_cu *);
-/* Try to locate the sections we need for DWARF 2 debugging
- information and return true if we have enough to do something. */
+static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
+ struct dwarf2_cu *);
-int
-dwarf2_has_info (bfd *abfd)
-{
- dwarf_info_offset = dwarf_abbrev_offset = dwarf_line_offset = 0;
- dwarf_str_offset = 0;
- dwarf_frame_offset = dwarf_eh_frame_offset = 0;
- bfd_map_over_sections (abfd, dwarf2_locate_sections, NULL);
- if (dwarf_info_offset && dwarf_abbrev_offset)
- {
- return 1;
- }
- else
- {
- return 0;
- }
-}
+static void dwarf_decode_macros (struct line_header *, unsigned int,
+ char *, bfd *, struct dwarf2_cu *);
-/* This function is mapped across the sections and remembers the
- offset and size of each of the debugging sections we are interested
- in. */
+static int attr_form_is_block (struct attribute *);
+
+static int attr_form_is_section_offset (struct attribute *);
+
+static int attr_form_is_constant (struct attribute *);
+
+static void dwarf2_symbol_mark_computed (struct attribute *attr,
+ struct symbol *sym,
+ struct dwarf2_cu *cu);
+
+static gdb_byte *skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
+ struct abbrev_info *abbrev,
+ struct dwarf2_cu *cu);
+
+static void free_stack_comp_unit (void *);
+
+static hashval_t partial_die_hash (const void *item);
+
+static int partial_die_eq (const void *item_lhs, const void *item_rhs);
+
+static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
+ (unsigned int offset, struct objfile *objfile);
+
+static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
+ (unsigned int offset, struct objfile *objfile);
+
+static struct dwarf2_cu *alloc_one_comp_unit (struct objfile *objfile);
+
+static void free_one_comp_unit (void *);
+
+static void free_cached_comp_units (void *);
+
+static void age_cached_comp_units (void);
+
+static void free_one_cached_comp_unit (void *);
+
+static struct type *set_die_type (struct die_info *, struct type *,
+ struct dwarf2_cu *);
+
+static void create_all_comp_units (struct objfile *);
+
+static void load_full_comp_unit (struct dwarf2_per_cu_data *,
+ struct objfile *);
+
+static void process_full_comp_unit (struct dwarf2_per_cu_data *);
+
+static void dwarf2_add_dependence (struct dwarf2_cu *,
+ struct dwarf2_per_cu_data *);
+
+static void dwarf2_mark (struct dwarf2_cu *);
+
+static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
+
+static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
+
+/* Try to locate the sections we need for DWARF 2 debugging
+ information and return true if we have enough to do something. */
+
+int
+dwarf2_has_info (struct objfile *objfile)
+{
+ struct dwarf2_per_objfile *data;
+
+ /* Initialize per-objfile state. */
+ data = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
+ memset (data, 0, sizeof (*data));
+ set_objfile_data (objfile, dwarf2_objfile_data_key, data);
+ dwarf2_per_objfile = data;
+
+ bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
+ return (data->info.asection != NULL && data->abbrev.asection != NULL);
+}
+
+/* When loading sections, we can either look for ".<name>", or for
+ * ".z<name>", which indicates a compressed section. */
+
+static int
+section_is_p (const char *section_name, const char *name)
+{
+ return (section_name[0] == '.'
+ && (strcmp (section_name + 1, name) == 0
+ || (section_name[1] == 'z'
+ && strcmp (section_name + 2, name) == 0)));
+}
+
+/* This function is mapped across the sections and remembers the
+ offset and size of each of the debugging sections we are interested
+ in. */
static void
-dwarf2_locate_sections (bfd *ignore_abfd, asection *sectp, PTR ignore_ptr)
+dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
{
- if (STREQ (sectp->name, INFO_SECTION))
+ if (section_is_p (sectp->name, INFO_SECTION))
{
- dwarf_info_offset = sectp->filepos;
- dwarf_info_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->info.asection = sectp;
+ dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
}
- else if (STREQ (sectp->name, ABBREV_SECTION))
+ else if (section_is_p (sectp->name, ABBREV_SECTION))
{
- dwarf_abbrev_offset = sectp->filepos;
- dwarf_abbrev_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->abbrev.asection = sectp;
+ dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
}
- else if (STREQ (sectp->name, LINE_SECTION))
+ else if (section_is_p (sectp->name, LINE_SECTION))
{
- dwarf_line_offset = sectp->filepos;
- dwarf_line_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->line.asection = sectp;
+ dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
}
- else if (STREQ (sectp->name, PUBNAMES_SECTION))
+ else if (section_is_p (sectp->name, PUBNAMES_SECTION))
{
- dwarf_pubnames_offset = sectp->filepos;
- dwarf_pubnames_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->pubnames.asection = sectp;
+ dwarf2_per_objfile->pubnames.size = bfd_get_section_size (sectp);
}
- else if (STREQ (sectp->name, ARANGES_SECTION))
+ else if (section_is_p (sectp->name, ARANGES_SECTION))
{
- dwarf_aranges_offset = sectp->filepos;
- dwarf_aranges_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->aranges.asection = sectp;
+ dwarf2_per_objfile->aranges.size = bfd_get_section_size (sectp);
}
- else if (STREQ (sectp->name, LOC_SECTION))
+ else if (section_is_p (sectp->name, LOC_SECTION))
{
- dwarf_loc_offset = sectp->filepos;
- dwarf_loc_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->loc.asection = sectp;
+ dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
}
- else if (STREQ (sectp->name, MACINFO_SECTION))
+ else if (section_is_p (sectp->name, MACINFO_SECTION))
{
- dwarf_macinfo_offset = sectp->filepos;
- dwarf_macinfo_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->macinfo.asection = sectp;
+ dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
}
- else if (STREQ (sectp->name, STR_SECTION))
+ else if (section_is_p (sectp->name, STR_SECTION))
{
- dwarf_str_offset = sectp->filepos;
- dwarf_str_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->str.asection = sectp;
+ dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
}
- else if (STREQ (sectp->name, FRAME_SECTION))
+ else if (section_is_p (sectp->name, FRAME_SECTION))
{
- dwarf_frame_offset = sectp->filepos;
- dwarf_frame_size = bfd_get_section_size_before_reloc (sectp);
+ dwarf2_per_objfile->frame.asection = sectp;
+ dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
}
- else if (STREQ (sectp->name, EH_FRAME_SECTION))
+ else if (section_is_p (sectp->name, EH_FRAME_SECTION))
{
- dwarf_eh_frame_offset = sectp->filepos;
- dwarf_eh_frame_size = bfd_get_section_size_before_reloc (sectp);
+ flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
+ if (aflag & SEC_HAS_CONTENTS)
+ {
+ dwarf2_per_objfile->eh_frame.asection = sectp;
+ dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
+ }
+ }
+ else if (section_is_p (sectp->name, RANGES_SECTION))
+ {
+ dwarf2_per_objfile->ranges.asection = sectp;
+ dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
}
+ else if (section_is_p (sectp->name, TYPES_SECTION))
+ {
+ dwarf2_per_objfile->types.asection = sectp;
+ dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
+ }
+
+ if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
+ && bfd_section_vma (abfd, sectp) == 0)
+ dwarf2_per_objfile->has_section_at_zero = 1;
}
-/* Build a partial symbol table. */
+/* Decompress a section that was compressed using zlib. Store the
+ decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
-void
-dwarf2_build_psymtabs (struct objfile *objfile, int mainline)
+static void
+zlib_decompress_section (struct objfile *objfile, asection *sectp,
+ gdb_byte **outbuf, bfd_size_type *outsize)
+{
+ bfd *abfd = objfile->obfd;
+#ifndef HAVE_ZLIB_H
+ error (_("Support for zlib-compressed DWARF data (from '%s') "
+ "is disabled in this copy of GDB"),
+ bfd_get_filename (abfd));
+#else
+ bfd_size_type compressed_size = bfd_get_section_size (sectp);
+ gdb_byte *compressed_buffer = xmalloc (compressed_size);
+ struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
+ bfd_size_type uncompressed_size;
+ gdb_byte *uncompressed_buffer;
+ z_stream strm;
+ int rc;
+ int header_size = 12;
+
+ if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
+ || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
+ error (_("Dwarf Error: Can't read DWARF data from '%s'"),
+ bfd_get_filename (abfd));
+
+ /* Read the zlib header. In this case, it should be "ZLIB" followed
+ by the uncompressed section size, 8 bytes in big-endian order. */
+ if (compressed_size < header_size
+ || strncmp (compressed_buffer, "ZLIB", 4) != 0)
+ error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
+ bfd_get_filename (abfd));
+ uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[11];
+
+ /* It is possible the section consists of several compressed
+ buffers concatenated together, so we uncompress in a loop. */
+ strm.zalloc = NULL;
+ strm.zfree = NULL;
+ strm.opaque = NULL;
+ strm.avail_in = compressed_size - header_size;
+ strm.next_in = (Bytef*) compressed_buffer + header_size;
+ strm.avail_out = uncompressed_size;
+ uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
+ uncompressed_size);
+ rc = inflateInit (&strm);
+ while (strm.avail_in > 0)
+ {
+ if (rc != Z_OK)
+ error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
+ bfd_get_filename (abfd), rc);
+ strm.next_out = ((Bytef*) uncompressed_buffer
+ + (uncompressed_size - strm.avail_out));
+ rc = inflate (&strm, Z_FINISH);
+ if (rc != Z_STREAM_END)
+ error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
+ bfd_get_filename (abfd), rc);
+ rc = inflateReset (&strm);
+ }
+ rc = inflateEnd (&strm);
+ if (rc != Z_OK
+ || strm.avail_out != 0)
+ error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
+ bfd_get_filename (abfd), rc);
+
+ do_cleanups (cleanup);
+ *outbuf = uncompressed_buffer;
+ *outsize = uncompressed_size;
+#endif
+}
+
+/* Read the contents of the section SECTP from object file specified by
+ OBJFILE, store info about the section into INFO.
+ If the section is compressed, uncompress it before returning. */
+
+static void
+dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
{
+ bfd *abfd = objfile->obfd;
+ asection *sectp = info->asection;
+ gdb_byte *buf, *retbuf;
+ unsigned char header[4];
+
+ info->buffer = NULL;
+ info->was_mmapped = 0;
+
+ if (info->asection == NULL || info->size == 0)
+ return;
+
+ /* Check if the file has a 4-byte header indicating compression. */
+ if (info->size > sizeof (header)
+ && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
+ && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
+ {
+ /* Upon decompression, update the buffer and its size. */
+ if (strncmp (header, "ZLIB", sizeof (header)) == 0)
+ {
+ zlib_decompress_section (objfile, sectp, &info->buffer,
+ &info->size);
+ return;
+ }
+ }
+
+#ifdef HAVE_MMAP
+ if (pagesize == 0)
+ pagesize = getpagesize ();
+
+ /* Only try to mmap sections which are large enough: we don't want to
+ waste space due to fragmentation. Also, only try mmap for sections
+ without relocations. */
+
+ if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
+ {
+ off_t pg_offset = sectp->filepos & ~(pagesize - 1);
+ size_t map_length = info->size + sectp->filepos - pg_offset;
+ caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ,
+ MAP_PRIVATE, pg_offset);
+
+ if (retbuf != MAP_FAILED)
+ {
+ info->was_mmapped = 1;
+ info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ;
+ return;
+ }
+ }
+#endif
+
+ /* If we get here, we are a normal, not-compressed section. */
+ info->buffer = buf
+ = obstack_alloc (&objfile->objfile_obstack, info->size);
+
+ /* When debugging .o files, we may need to apply relocations; see
+ http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
+ We never compress sections in .o files, so we only need to
+ try this when the section is not compressed. */
+ retbuf = symfile_relocate_debug_section (abfd, sectp, buf);
+ if (retbuf != NULL)
+ {
+ info->buffer = retbuf;
+ return;
+ }
- /* We definitely need the .debug_info and .debug_abbrev sections */
+ if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
+ || bfd_bread (buf, info->size, abfd) != info->size)
+ error (_("Dwarf Error: Can't read DWARF data from '%s'"),
+ bfd_get_filename (abfd));
+}
- dwarf_info_buffer = dwarf2_read_section (objfile,
- dwarf_info_offset,
- dwarf_info_size);
- dwarf_abbrev_buffer = dwarf2_read_section (objfile,
- dwarf_abbrev_offset,
- dwarf_abbrev_size);
- dwarf_line_buffer = dwarf2_read_section (objfile,
- dwarf_line_offset,
- dwarf_line_size);
+/* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
+ SECTION_NAME. */
- if (dwarf_str_offset)
- dwarf_str_buffer = dwarf2_read_section (objfile,
- dwarf_str_offset,
- dwarf_str_size);
+void
+dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
+ asection **sectp, gdb_byte **bufp,
+ bfd_size_type *sizep)
+{
+ struct dwarf2_per_objfile *data
+ = objfile_data (objfile, dwarf2_objfile_data_key);
+ struct dwarf2_section_info *info;
+ if (section_is_p (section_name, EH_FRAME_SECTION))
+ info = &data->eh_frame;
+ else if (section_is_p (section_name, FRAME_SECTION))
+ info = &data->frame;
else
- dwarf_str_buffer = NULL;
+ gdb_assert (0);
+
+ if (info->asection != NULL && info->size != 0 && info->buffer == NULL)
+ /* We haven't read this section in yet. Do it now. */
+ dwarf2_read_section (objfile, info);
+
+ *sectp = info->asection;
+ *bufp = info->buffer;
+ *sizep = info->size;
+}
- if (mainline
- || (objfile->global_psymbols.size == 0
- && objfile->static_psymbols.size == 0))
+/* Build a partial symbol table. */
+
+void
+dwarf2_build_psymtabs (struct objfile *objfile)
+{
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->abbrev);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->line);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->str);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->macinfo);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->loc);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->eh_frame);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->frame);
+
+ if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
{
init_psymbol_list (objfile, 1024);
}
/* Things are significantly easier if we have .debug_aranges and
.debug_pubnames sections */
- dwarf2_build_psymtabs_easy (objfile, mainline);
+ dwarf2_build_psymtabs_easy (objfile);
}
else
#endif
/* only test this case for now */
{
/* In this case we have to work a bit harder */
- dwarf2_build_psymtabs_hard (objfile, mainline);
+ dwarf2_build_psymtabs_hard (objfile);
}
}
.debug_pubnames and .debug_aranges sections. */
static void
-dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline)
+dwarf2_build_psymtabs_easy (struct objfile *objfile)
{
bfd *abfd = objfile->obfd;
char *aranges_buffer, *pubnames_buffer;
unsigned int entry_length, version, info_offset, info_size;
pubnames_buffer = dwarf2_read_section (objfile,
- dwarf_pubnames_offset,
- dwarf_pubnames_size);
+ dwarf_pubnames_section);
pubnames_ptr = pubnames_buffer;
- while ((pubnames_ptr - pubnames_buffer) < dwarf_pubnames_size)
+ while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames.size)
{
- struct comp_unit_head cu_header;
- int bytes_read;
+ unsigned int bytes_read;
- entry_length = read_initial_length (abfd, pubnames_ptr, &cu_header,
- &bytes_read);
+ entry_length = read_initial_length (abfd, pubnames_ptr, &bytes_read);
pubnames_ptr += bytes_read;
version = read_1_byte (abfd, pubnames_ptr);
pubnames_ptr += 1;
}
aranges_buffer = dwarf2_read_section (objfile,
- dwarf_aranges_offset,
- dwarf_aranges_size);
+ dwarf_aranges_section);
}
#endif
-/* Read in the comp unit header information from the debug_info at
- info_ptr. */
+/* Return TRUE if OFFSET is within CU_HEADER. */
-static char *
+static inline int
+offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
+{
+ unsigned int bottom = cu_header->offset;
+ unsigned int top = (cu_header->offset
+ + cu_header->length
+ + cu_header->initial_length_size);
+ return (offset >= bottom && offset < top);
+}
+
+/* Read in the comp unit header information from the debug_info at info_ptr.
+ NOTE: This leaves members offset, first_die_offset to be filled in
+ by the caller. */
+
+static gdb_byte *
read_comp_unit_head (struct comp_unit_head *cu_header,
- char *info_ptr, bfd *abfd)
+ gdb_byte *info_ptr, bfd *abfd)
{
int signed_addr;
- int bytes_read;
- cu_header->length = read_initial_length (abfd, info_ptr, cu_header,
- &bytes_read);
+ unsigned int bytes_read;
+
+ cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
+ cu_header->initial_length_size = bytes_read;
+ cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
info_ptr += bytes_read;
cu_header->version = read_2_bytes (abfd, info_ptr);
info_ptr += 2;
cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
- &bytes_read);
+ &bytes_read);
info_ptr += bytes_read;
cu_header->addr_size = read_1_byte (abfd, info_ptr);
info_ptr += 1;
signed_addr = bfd_get_sign_extend_vma (abfd);
if (signed_addr < 0)
internal_error (__FILE__, __LINE__,
- "read_comp_unit_head: dwarf from non elf file");
+ _("read_comp_unit_head: dwarf from non elf file"));
cu_header->signed_addr_p = signed_addr;
+
return info_ptr;
}
-/* Build the partial symbol table by doing a quick pass through the
- .debug_info and .debug_abbrev sections. */
+static gdb_byte *
+partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
+ gdb_byte *buffer, unsigned int buffer_size,
+ bfd *abfd)
+{
+ gdb_byte *beg_of_comp_unit = info_ptr;
+
+ info_ptr = read_comp_unit_head (header, info_ptr, abfd);
+
+ if (header->version != 2 && header->version != 3)
+ error (_("Dwarf Error: wrong version in compilation unit header "
+ "(is %d, should be %d) [in module %s]"), header->version,
+ 2, bfd_get_filename (abfd));
+
+ if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size)
+ error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
+ "(offset 0x%lx + 6) [in module %s]"),
+ (long) header->abbrev_offset,
+ (long) (beg_of_comp_unit - buffer),
+ bfd_get_filename (abfd));
+
+ if (beg_of_comp_unit + header->length + header->initial_length_size
+ > buffer + buffer_size)
+ error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
+ "(offset 0x%lx + 0) [in module %s]"),
+ (long) header->length,
+ (long) (beg_of_comp_unit - buffer),
+ bfd_get_filename (abfd));
+
+ return info_ptr;
+}
+
+/* Read in the types comp unit header information from .debug_types entry at
+ types_ptr. The result is a pointer to one past the end of the header. */
+
+static gdb_byte *
+read_type_comp_unit_head (struct comp_unit_head *cu_header,
+ ULONGEST *signature,
+ gdb_byte *types_ptr, bfd *abfd)
+{
+ unsigned int bytes_read;
+ gdb_byte *initial_types_ptr = types_ptr;
+
+ cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
+
+ types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
+
+ *signature = read_8_bytes (abfd, types_ptr);
+ types_ptr += 8;
+ types_ptr += cu_header->offset_size;
+ cu_header->first_die_offset = types_ptr - initial_types_ptr;
+
+ return types_ptr;
+}
+
+/* Allocate a new partial symtab for file named NAME and mark this new
+ partial symtab as being an include of PST. */
static void
-dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline)
+dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
+ struct objfile *objfile)
{
- /* Instead of reading this into a big buffer, we should probably use
- mmap() on architectures that support it. (FIXME) */
+ struct partial_symtab *subpst = allocate_psymtab (name, objfile);
+
+ subpst->section_offsets = pst->section_offsets;
+ subpst->textlow = 0;
+ subpst->texthigh = 0;
+
+ subpst->dependencies = (struct partial_symtab **)
+ obstack_alloc (&objfile->objfile_obstack,
+ sizeof (struct partial_symtab *));
+ subpst->dependencies[0] = pst;
+ subpst->number_of_dependencies = 1;
+
+ subpst->globals_offset = 0;
+ subpst->n_global_syms = 0;
+ subpst->statics_offset = 0;
+ subpst->n_static_syms = 0;
+ subpst->symtab = NULL;
+ subpst->read_symtab = pst->read_symtab;
+ subpst->readin = 0;
+
+ /* No private part is necessary for include psymtabs. This property
+ can be used to differentiate between such include psymtabs and
+ the regular ones. */
+ subpst->read_symtab_private = NULL;
+}
+
+/* Read the Line Number Program data and extract the list of files
+ included by the source file represented by PST. Build an include
+ partial symtab for each of these included files. */
+
+static void
+dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
+ struct die_info *die,
+ struct partial_symtab *pst)
+{
+ struct objfile *objfile = cu->objfile;
bfd *abfd = objfile->obfd;
- char *info_ptr, *abbrev_ptr;
- char *beg_of_comp_unit;
- struct partial_die_info comp_unit_die;
- struct partial_symtab *pst;
- struct cleanup *back_to;
- CORE_ADDR lowpc, highpc;
+ struct line_header *lh = NULL;
+ struct attribute *attr;
- info_ptr = dwarf_info_buffer;
- abbrev_ptr = dwarf_abbrev_buffer;
+ attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
+ if (attr)
+ {
+ unsigned int line_offset = DW_UNSND (attr);
+ lh = dwarf_decode_line_header (line_offset, abfd, cu);
+ }
+ if (lh == NULL)
+ return; /* No linetable, so no includes. */
- /* We use dwarf2_tmp_obstack for objects that don't need to survive
- the partial symbol scan, like attribute values.
+ dwarf_decode_lines (lh, NULL, abfd, cu, pst);
- We could reduce our peak memory consumption during partial symbol
- table construction by freeing stuff from this obstack more often
- --- say, after processing each compilation unit, or each die ---
- but it turns out that this saves almost nothing. For an
- executable with 11Mb of Dwarf 2 data, I found about 64k allocated
- on dwarf2_tmp_obstack. Some investigation showed:
+ free_line_header (lh);
+}
- 1) 69% of the attributes used forms DW_FORM_addr, DW_FORM_data*,
- DW_FORM_flag, DW_FORM_[su]data, and DW_FORM_ref*. These are
- all fixed-length values not requiring dynamic allocation.
+static hashval_t
+hash_type_signature (const void *item)
+{
+ const struct signatured_type *type_sig = item;
+ /* This drops the top 32 bits of the signature, but is ok for a hash. */
+ return type_sig->signature;
+}
- 2) 30% of the attributes used the form DW_FORM_string. For
- DW_FORM_string, read_attribute simply hands back a pointer to
- the null-terminated string in dwarf_info_buffer, so no dynamic
- allocation is needed there either.
+static int
+eq_type_signature (const void *item_lhs, const void *item_rhs)
+{
+ const struct signatured_type *lhs = item_lhs;
+ const struct signatured_type *rhs = item_rhs;
+ return lhs->signature == rhs->signature;
+}
- 3) The remaining 1% of the attributes all used DW_FORM_block1.
- 75% of those were DW_AT_frame_base location lists for
- functions; the rest were DW_AT_location attributes, probably
- for the global variables.
+/* Create the hash table of all entries in the .debug_types section.
+ The result is zero if there is an error (e.g. missing .debug_types section),
+ otherwise non-zero. */
- Anyway, what this all means is that the memory the dwarf2
- reader uses as temporary space reading partial symbols is about
- 0.5% as much as we use for dwarf_*_buffer. That's noise. */
+static int
+create_debug_types_hash_table (struct objfile *objfile)
+{
+ gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer;
+ htab_t types_htab;
- obstack_init (&dwarf2_tmp_obstack);
- back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL);
+ if (info_ptr == NULL)
+ {
+ dwarf2_per_objfile->signatured_types = NULL;
+ return 0;
+ }
- /* Since the objects we're extracting from dwarf_info_buffer vary in
- length, only the individual functions to extract them (like
- read_comp_unit_head and read_partial_die) can really know whether
- the buffer is large enough to hold another complete object.
+ types_htab = htab_create_alloc_ex (41,
+ hash_type_signature,
+ eq_type_signature,
+ NULL,
+ &objfile->objfile_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
- At the moment, they don't actually check that. If
- dwarf_info_buffer holds just one extra byte after the last
- compilation unit's dies, then read_comp_unit_head will happily
- read off the end of the buffer. read_partial_die is similarly
- casual. Those functions should be fixed.
+ if (dwarf2_die_debug)
+ fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
- For this loop condition, simply checking whether there's any data
- left at all should be sufficient. */
- while (info_ptr < dwarf_info_buffer + dwarf_info_size)
+ while (info_ptr < dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
{
- struct comp_unit_head cu_header;
- beg_of_comp_unit = info_ptr;
- info_ptr = read_comp_unit_head (&cu_header, info_ptr, abfd);
+ unsigned int offset;
+ unsigned int offset_size;
+ unsigned int type_offset;
+ unsigned int length, initial_length_size;
+ unsigned short version;
+ ULONGEST signature;
+ struct signatured_type *type_sig;
+ void **slot;
+ gdb_byte *ptr = info_ptr;
- if (cu_header.version != 2)
- {
- error ("Dwarf Error: wrong version in compilation unit header.");
- return;
- }
- if (cu_header.abbrev_offset >= dwarf_abbrev_size)
- {
- error ("Dwarf Error: bad offset (0x%lx) in compilation unit header (offset 0x%lx + 6).",
- (long) cu_header.abbrev_offset,
- (long) (beg_of_comp_unit - dwarf_info_buffer));
- return;
- }
- if (beg_of_comp_unit + cu_header.length + cu_header.initial_length_size
- > dwarf_info_buffer + dwarf_info_size)
+ offset = ptr - dwarf2_per_objfile->types.buffer;
+
+ /* We need to read the type's signature in order to build the hash
+ table, but we don't need to read anything else just yet. */
+
+ /* Sanity check to ensure entire cu is present. */
+ length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
+ if (ptr + length + initial_length_size
+ > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
{
- error ("Dwarf Error: bad length (0x%lx) in compilation unit header (offset 0x%lx + 0).",
- (long) cu_header.length,
- (long) (beg_of_comp_unit - dwarf_info_buffer));
- return;
+ complaint (&symfile_complaints,
+ _("debug type entry runs off end of `.debug_types' section, ignored"));
+ break;
}
- /* Read the abbrevs for this compilation unit into a table */
- dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);
- make_cleanup (dwarf2_empty_abbrev_table, NULL);
-
- /* Read the compilation unit die */
- info_ptr = read_partial_die (&comp_unit_die, abfd, info_ptr,
- &cu_header);
-
- /* Set the language we're debugging */
- set_cu_language (comp_unit_die.language);
-
- /* Allocate a new partial symbol table structure */
- pst = start_psymtab_common (objfile, objfile->section_offsets,
- comp_unit_die.name ? comp_unit_die.name : "",
- comp_unit_die.lowpc,
- objfile->global_psymbols.next,
- objfile->static_psymbols.next);
-
- pst->read_symtab_private = (char *)
- obstack_alloc (&objfile->psymbol_obstack, sizeof (struct dwarf2_pinfo));
- cu_header_offset = beg_of_comp_unit - dwarf_info_buffer;
- DWARF_INFO_BUFFER (pst) = dwarf_info_buffer;
- DWARF_INFO_OFFSET (pst) = beg_of_comp_unit - dwarf_info_buffer;
- DWARF_ABBREV_BUFFER (pst) = dwarf_abbrev_buffer;
- DWARF_ABBREV_SIZE (pst) = dwarf_abbrev_size;
- DWARF_LINE_BUFFER (pst) = dwarf_line_buffer;
- DWARF_STR_BUFFER (pst) = dwarf_str_buffer;
- DWARF_STR_SIZE (pst) = dwarf_str_size;
- baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
-
- /* Store the function that reads in the rest of the symbol table */
- pst->read_symtab = dwarf2_psymtab_to_symtab;
-
- /* Check if comp unit has_children.
- If so, read the rest of the partial symbols from this comp unit.
- If not, there's no more debug_info for this comp unit. */
- if (comp_unit_die.has_children)
- {
- info_ptr = scan_partial_symbols (info_ptr, objfile, &lowpc, &highpc,
- &cu_header);
- /* If the compilation unit didn't have an explicit address range,
- then use the information extracted from its child dies. */
- if (! comp_unit_die.has_pc_info)
- {
- comp_unit_die.lowpc = lowpc;
- comp_unit_die.highpc = highpc;
- }
- }
- pst->textlow = comp_unit_die.lowpc + baseaddr;
- pst->texthigh = comp_unit_die.highpc + baseaddr;
+ offset_size = initial_length_size == 4 ? 4 : 8;
+ ptr += initial_length_size;
+ version = bfd_get_16 (objfile->obfd, ptr);
+ ptr += 2;
+ ptr += offset_size; /* abbrev offset */
+ ptr += 1; /* address size */
+ signature = bfd_get_64 (objfile->obfd, ptr);
+ ptr += 8;
+ type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
- pst->n_global_syms = objfile->global_psymbols.next -
- (objfile->global_psymbols.list + pst->globals_offset);
- pst->n_static_syms = objfile->static_psymbols.next -
- (objfile->static_psymbols.list + pst->statics_offset);
- sort_pst_symbols (pst);
+ type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
+ memset (type_sig, 0, sizeof (*type_sig));
+ type_sig->signature = signature;
+ type_sig->offset = offset;
+ type_sig->type_offset = type_offset;
- /* If there is already a psymtab or symtab for a file of this
- name, remove it. (If there is a symtab, more drastic things
- also happen.) This happens in VxWorks. */
- free_named_symtabs (pst->filename);
+ slot = htab_find_slot (types_htab, type_sig, INSERT);
+ gdb_assert (slot != NULL);
+ *slot = type_sig;
- info_ptr = beg_of_comp_unit + cu_header.length
- + cu_header.initial_length_size;
+ if (dwarf2_die_debug)
+ fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
+ offset, phex (signature, sizeof (signature)));
+
+ info_ptr = info_ptr + initial_length_size + length;
}
- do_cleanups (back_to);
+
+ dwarf2_per_objfile->signatured_types = types_htab;
+
+ return 1;
}
-/* Read in all interesting dies to the end of the compilation unit. */
+/* Lookup a signature based type.
+ Returns NULL if SIG is not present in the table. */
-static char *
-scan_partial_symbols (char *info_ptr, struct objfile *objfile,
- CORE_ADDR *lowpc, CORE_ADDR *highpc,
- const struct comp_unit_head *cu_header)
+static struct signatured_type *
+lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
{
- bfd *abfd = objfile->obfd;
- struct partial_die_info pdi;
+ struct signatured_type find_entry, *entry;
- /* This function is called after we've read in the comp_unit_die in
- order to read its children. We start the nesting level at 1 since
- we have pushed 1 level down in order to read the comp unit's children.
- The comp unit itself is at level 0, so we stop reading when we pop
- back to that level. */
+ if (dwarf2_per_objfile->signatured_types == NULL)
+ {
+ complaint (&symfile_complaints,
+ _("missing `.debug_types' section for DW_FORM_sig8 die"));
+ return 0;
+ }
- int nesting_level = 1;
+ find_entry.signature = sig;
+ entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
+ return entry;
+}
- *lowpc = ((CORE_ADDR) -1);
- *highpc = ((CORE_ADDR) 0);
+/* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
- while (nesting_level)
- {
- info_ptr = read_partial_die (&pdi, abfd, info_ptr, cu_header);
+static void
+init_cu_die_reader (struct die_reader_specs *reader,
+ struct dwarf2_cu *cu)
+{
+ reader->abfd = cu->objfile->obfd;
+ reader->cu = cu;
+ if (cu->per_cu->from_debug_types)
+ reader->buffer = dwarf2_per_objfile->types.buffer;
+ else
+ reader->buffer = dwarf2_per_objfile->info.buffer;
+}
- if (pdi.name)
- {
- switch (pdi.tag)
- {
- case DW_TAG_subprogram:
- if (pdi.has_pc_info)
- {
- if (pdi.lowpc < *lowpc)
- {
- *lowpc = pdi.lowpc;
- }
- if (pdi.highpc > *highpc)
- {
- *highpc = pdi.highpc;
- }
- if ((pdi.is_external || nesting_level == 1)
- && !pdi.is_declaration)
- {
- add_partial_symbol (&pdi, objfile, cu_header);
- }
- }
- break;
- case DW_TAG_variable:
- case DW_TAG_typedef:
- case DW_TAG_class_type:
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- case DW_TAG_enumeration_type:
- if ((pdi.is_external || nesting_level == 1)
- && !pdi.is_declaration)
- {
- add_partial_symbol (&pdi, objfile, cu_header);
- }
- break;
- case DW_TAG_enumerator:
- /* File scope enumerators are added to the partial symbol
- table. */
- if (nesting_level == 2)
- add_partial_symbol (&pdi, objfile, cu_header);
- break;
- case DW_TAG_base_type:
- /* File scope base type definitions are added to the partial
- symbol table. */
- if (nesting_level == 1)
- add_partial_symbol (&pdi, objfile, cu_header);
- break;
- default:
- break;
- }
- }
+/* Find the base address of the compilation unit for range lists and
+ location lists. It will normally be specified by DW_AT_low_pc.
+ In DWARF-3 draft 4, the base address could be overridden by
+ DW_AT_entry_pc. It's been removed, but GCC still uses this for
+ compilation units with discontinuous ranges. */
- /* If the die has a sibling, skip to the sibling.
- Do not skip enumeration types, we want to record their
- enumerators. */
- if (pdi.sibling && pdi.tag != DW_TAG_enumeration_type)
- {
- info_ptr = pdi.sibling;
- }
- else if (pdi.has_children)
- {
- /* Die has children, but the optional DW_AT_sibling attribute
- is missing. */
- nesting_level++;
- }
+static void
+dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
- if (pdi.tag == 0)
+ cu->base_known = 0;
+ cu->base_address = 0;
+
+ attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
+ if (attr)
+ {
+ cu->base_address = DW_ADDR (attr);
+ cu->base_known = 1;
+ }
+ else
+ {
+ attr = dwarf2_attr (die, DW_AT_low_pc, cu);
+ if (attr)
{
- nesting_level--;
+ cu->base_address = DW_ADDR (attr);
+ cu->base_known = 1;
}
}
-
- /* If we didn't find a lowpc, set it to highpc to avoid complaints
- from `maint check'. */
- if (*lowpc == ((CORE_ADDR) -1))
- *lowpc = *highpc;
- return info_ptr;
}
-static void
-add_partial_symbol (struct partial_die_info *pdi, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+/* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
+ to combine the common parts.
+ Process a compilation unit for a psymtab.
+ BUFFER is a pointer to the beginning of the dwarf section buffer,
+ either .debug_info or debug_types.
+ INFO_PTR is a pointer to the start of the CU.
+ Returns a pointer to the next CU. */
+
+static gdb_byte *
+process_psymtab_comp_unit (struct objfile *objfile,
+ struct dwarf2_per_cu_data *this_cu,
+ gdb_byte *buffer, gdb_byte *info_ptr,
+ unsigned int buffer_size)
{
- CORE_ADDR addr = 0;
+ bfd *abfd = objfile->obfd;
+ gdb_byte *beg_of_comp_unit = info_ptr;
+ struct die_info *comp_unit_die;
+ struct partial_symtab *pst;
+ CORE_ADDR baseaddr;
+ struct cleanup *back_to_inner;
+ struct dwarf2_cu cu;
+ unsigned int bytes_read;
+ int has_children, has_pc_info;
+ struct attribute *attr;
+ const char *name;
+ CORE_ADDR best_lowpc = 0, best_highpc = 0;
+ struct die_reader_specs reader_specs;
+
+ memset (&cu, 0, sizeof (cu));
+ cu.objfile = objfile;
+ obstack_init (&cu.comp_unit_obstack);
+
+ back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
+
+ info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
+ buffer, buffer_size,
+ abfd);
+
+ /* Complete the cu_header. */
+ cu.header.offset = beg_of_comp_unit - buffer;
+ cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
+
+ cu.list_in_scope = &file_symbols;
+
+ /* If this compilation unit was already read in, free the
+ cached copy in order to read it in again. This is
+ necessary because we skipped some symbols when we first
+ read in the compilation unit (see load_partial_dies).
+ This problem could be avoided, but the benefit is
+ unclear. */
+ if (this_cu->cu != NULL)
+ free_one_cached_comp_unit (this_cu->cu);
+
+ /* Note that this is a pointer to our stack frame, being
+ added to a global data structure. It will be cleaned up
+ in free_stack_comp_unit when we finish with this
+ compilation unit. */
+ this_cu->cu = &cu;
+ cu.per_cu = this_cu;
+
+ /* Read the abbrevs for this compilation unit into a table. */
+ dwarf2_read_abbrevs (abfd, &cu);
+ make_cleanup (dwarf2_free_abbrev_table, &cu);
+
+ /* Read the compilation unit die. */
+ if (this_cu->from_debug_types)
+ info_ptr += 8 /*signature*/ + cu.header.offset_size;
+ init_cu_die_reader (&reader_specs, &cu);
+ info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
+ &has_children);
+
+ if (this_cu->from_debug_types)
+ {
+ /* offset,length haven't been set yet for type units. */
+ this_cu->offset = cu.header.offset;
+ this_cu->length = cu.header.length + cu.header.initial_length_size;
+ }
+ else if (comp_unit_die->tag == DW_TAG_partial_unit)
+ {
+ info_ptr = (beg_of_comp_unit + cu.header.length
+ + cu.header.initial_length_size);
+ do_cleanups (back_to_inner);
+ return info_ptr;
+ }
- switch (pdi->tag)
+ /* Set the language we're debugging. */
+ attr = dwarf2_attr (comp_unit_die, DW_AT_language, &cu);
+ if (attr)
+ set_cu_language (DW_UNSND (attr), &cu);
+ else
+ set_cu_language (language_minimal, &cu);
+
+ /* Allocate a new partial symbol table structure. */
+ attr = dwarf2_attr (comp_unit_die, DW_AT_name, &cu);
+ pst = start_psymtab_common (objfile, objfile->section_offsets,
+ (attr != NULL) ? DW_STRING (attr) : "",
+ /* TEXTLOW and TEXTHIGH are set below. */
+ 0,
+ objfile->global_psymbols.next,
+ objfile->static_psymbols.next);
+
+ attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, &cu);
+ if (attr != NULL)
+ pst->dirname = DW_STRING (attr);
+
+ pst->read_symtab_private = (char *) this_cu;
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ /* Store the function that reads in the rest of the symbol table */
+ pst->read_symtab = dwarf2_psymtab_to_symtab;
+
+ this_cu->psymtab = pst;
+
+ dwarf2_find_base_address (comp_unit_die, &cu);
+
+ /* Possibly set the default values of LOWPC and HIGHPC from
+ `DW_AT_ranges'. */
+ has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
+ &best_highpc, &cu, pst);
+ if (has_pc_info == 1 && best_lowpc < best_highpc)
+ /* Store the contiguous range if it is not empty; it can be empty for
+ CUs with no code. */
+ addrmap_set_empty (objfile->psymtabs_addrmap,
+ best_lowpc + baseaddr,
+ best_highpc + baseaddr - 1, pst);
+
+ /* Check if comp unit has_children.
+ If so, read the rest of the partial symbols from this comp unit.
+ If not, there's no more debug_info for this comp unit. */
+ if (has_children)
{
- case DW_TAG_subprogram:
- if (pdi->is_external)
+ struct partial_die_info *first_die;
+ CORE_ADDR lowpc, highpc;
+
+ lowpc = ((CORE_ADDR) -1);
+ highpc = ((CORE_ADDR) 0);
+
+ first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
+
+ scan_partial_symbols (first_die, &lowpc, &highpc,
+ ! has_pc_info, &cu);
+
+ /* If we didn't find a lowpc, set it to highpc to avoid
+ complaints from `maint check'. */
+ if (lowpc == ((CORE_ADDR) -1))
+ lowpc = highpc;
+
+ /* If the compilation unit didn't have an explicit address range,
+ then use the information extracted from its child dies. */
+ if (! has_pc_info)
{
- /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
- mst_text, objfile); */
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_BLOCK,
- &objfile->global_psymbols,
- 0, pdi->lowpc + baseaddr, cu_language, objfile);
+ best_lowpc = lowpc;
+ best_highpc = highpc;
+ }
+ }
+ pst->textlow = best_lowpc + baseaddr;
+ pst->texthigh = best_highpc + baseaddr;
+
+ pst->n_global_syms = objfile->global_psymbols.next -
+ (objfile->global_psymbols.list + pst->globals_offset);
+ pst->n_static_syms = objfile->static_psymbols.next -
+ (objfile->static_psymbols.list + pst->statics_offset);
+ sort_pst_symbols (pst);
+
+ /* If there is already a psymtab or symtab for a file of this
+ name, remove it. (If there is a symtab, more drastic things
+ also happen.) This happens in VxWorks. */
+ if (! this_cu->from_debug_types)
+ free_named_symtabs (pst->filename);
+
+ info_ptr = (beg_of_comp_unit + cu.header.length
+ + cu.header.initial_length_size);
+
+ if (this_cu->from_debug_types)
+ {
+ /* It's not clear we want to do anything with stmt lists here.
+ Waiting to see what gcc ultimately does. */
+ }
+ else
+ {
+ /* Get the list of files included in the current compilation unit,
+ and build a psymtab for each of them. */
+ dwarf2_build_include_psymtabs (&cu, comp_unit_die, pst);
+ }
+
+ do_cleanups (back_to_inner);
+
+ return info_ptr;
+}
+
+/* Traversal function for htab_traverse_noresize.
+ Process one .debug_types comp-unit. */
+
+static int
+process_type_comp_unit (void **slot, void *info)
+{
+ struct signatured_type *entry = (struct signatured_type *) *slot;
+ struct objfile *objfile = (struct objfile *) info;
+ struct dwarf2_per_cu_data *this_cu;
+
+ this_cu = &entry->per_cu;
+ this_cu->from_debug_types = 1;
+
+ process_psymtab_comp_unit (objfile, this_cu,
+ dwarf2_per_objfile->types.buffer,
+ dwarf2_per_objfile->types.buffer + entry->offset,
+ dwarf2_per_objfile->types.size);
+
+ return 1;
+}
+
+/* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
+ Build partial symbol tables for the .debug_types comp-units. */
+
+static void
+build_type_psymtabs (struct objfile *objfile)
+{
+ if (! create_debug_types_hash_table (objfile))
+ return;
+
+ htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
+ process_type_comp_unit, objfile);
+}
+
+/* Build the partial symbol table by doing a quick pass through the
+ .debug_info and .debug_abbrev sections. */
+
+static void
+dwarf2_build_psymtabs_hard (struct objfile *objfile)
+{
+ /* Instead of reading this into a big buffer, we should probably use
+ mmap() on architectures that support it. (FIXME) */
+ bfd *abfd = objfile->obfd;
+ gdb_byte *info_ptr;
+ struct cleanup *back_to;
+
+ info_ptr = dwarf2_per_objfile->info.buffer;
+
+ /* Any cached compilation units will be linked by the per-objfile
+ read_in_chain. Make sure to free them when we're done. */
+ back_to = make_cleanup (free_cached_comp_units, NULL);
+
+ build_type_psymtabs (objfile);
+
+ create_all_comp_units (objfile);
+
+ objfile->psymtabs_addrmap =
+ addrmap_create_mutable (&objfile->objfile_obstack);
+
+ /* Since the objects we're extracting from .debug_info vary in
+ length, only the individual functions to extract them (like
+ read_comp_unit_head and load_partial_die) can really know whether
+ the buffer is large enough to hold another complete object.
+
+ At the moment, they don't actually check that. If .debug_info
+ holds just one extra byte after the last compilation unit's dies,
+ then read_comp_unit_head will happily read off the end of the
+ buffer. read_partial_die is similarly casual. Those functions
+ should be fixed.
+
+ For this loop condition, simply checking whether there's any data
+ left at all should be sufficient. */
+
+ while (info_ptr < (dwarf2_per_objfile->info.buffer
+ + dwarf2_per_objfile->info.size))
+ {
+ struct dwarf2_per_cu_data *this_cu;
+
+ this_cu = dwarf2_find_comp_unit (info_ptr - dwarf2_per_objfile->info.buffer,
+ objfile);
+
+ info_ptr = process_psymtab_comp_unit (objfile, this_cu,
+ dwarf2_per_objfile->info.buffer,
+ info_ptr,
+ dwarf2_per_objfile->info.size);
+ }
+
+ objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
+ &objfile->objfile_obstack);
+
+ do_cleanups (back_to);
+}
+
+/* Load the partial DIEs for a secondary CU into memory. */
+
+static void
+load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
+ struct objfile *objfile)
+{
+ bfd *abfd = objfile->obfd;
+ gdb_byte *info_ptr, *beg_of_comp_unit;
+ struct die_info *comp_unit_die;
+ struct dwarf2_cu *cu;
+ unsigned int bytes_read;
+ struct cleanup *back_to;
+ struct attribute *attr;
+ int has_children;
+ struct die_reader_specs reader_specs;
+
+ gdb_assert (! this_cu->from_debug_types);
+
+ info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
+ beg_of_comp_unit = info_ptr;
+
+ cu = alloc_one_comp_unit (objfile);
+
+ /* ??? Missing cleanup for CU? */
+
+ /* Link this compilation unit into the compilation unit tree. */
+ this_cu->cu = cu;
+ cu->per_cu = this_cu;
+ cu->type_hash = this_cu->type_hash;
+
+ info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
+ dwarf2_per_objfile->info.buffer,
+ dwarf2_per_objfile->info.size,
+ abfd);
+
+ /* Complete the cu_header. */
+ cu->header.offset = this_cu->offset;
+ cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
+
+ /* Read the abbrevs for this compilation unit into a table. */
+ dwarf2_read_abbrevs (abfd, cu);
+ back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
+
+ /* Read the compilation unit die. */
+ init_cu_die_reader (&reader_specs, cu);
+ info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
+ &has_children);
+
+ /* Set the language we're debugging. */
+ attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
+ if (attr)
+ set_cu_language (DW_UNSND (attr), cu);
+ else
+ set_cu_language (language_minimal, cu);
+
+ /* Check if comp unit has_children.
+ If so, read the rest of the partial symbols from this comp unit.
+ If not, there's no more debug_info for this comp unit. */
+ if (has_children)
+ load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
+
+ do_cleanups (back_to);
+}
+
+/* Create a list of all compilation units in OBJFILE. We do this only
+ if an inter-comp-unit reference is found; presumably if there is one,
+ there will be many, and one will occur early in the .debug_info section.
+ So there's no point in building this list incrementally. */
+
+static void
+create_all_comp_units (struct objfile *objfile)
+{
+ int n_allocated;
+ int n_comp_units;
+ struct dwarf2_per_cu_data **all_comp_units;
+ gdb_byte *info_ptr = dwarf2_per_objfile->info.buffer;
+
+ n_comp_units = 0;
+ n_allocated = 10;
+ all_comp_units = xmalloc (n_allocated
+ * sizeof (struct dwarf2_per_cu_data *));
+
+ while (info_ptr < dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size)
+ {
+ unsigned int length, initial_length_size;
+ gdb_byte *beg_of_comp_unit;
+ struct dwarf2_per_cu_data *this_cu;
+ unsigned int offset;
+
+ offset = info_ptr - dwarf2_per_objfile->info.buffer;
+
+ /* Read just enough information to find out where the next
+ compilation unit is. */
+ length = read_initial_length (objfile->obfd, info_ptr,
+ &initial_length_size);
+
+ /* Save the compilation unit for later lookup. */
+ this_cu = obstack_alloc (&objfile->objfile_obstack,
+ sizeof (struct dwarf2_per_cu_data));
+ memset (this_cu, 0, sizeof (*this_cu));
+ this_cu->offset = offset;
+ this_cu->length = length + initial_length_size;
+
+ if (n_comp_units == n_allocated)
+ {
+ n_allocated *= 2;
+ all_comp_units = xrealloc (all_comp_units,
+ n_allocated
+ * sizeof (struct dwarf2_per_cu_data *));
+ }
+ all_comp_units[n_comp_units++] = this_cu;
+
+ info_ptr = info_ptr + this_cu->length;
+ }
+
+ dwarf2_per_objfile->all_comp_units
+ = obstack_alloc (&objfile->objfile_obstack,
+ n_comp_units * sizeof (struct dwarf2_per_cu_data *));
+ memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
+ n_comp_units * sizeof (struct dwarf2_per_cu_data *));
+ xfree (all_comp_units);
+ dwarf2_per_objfile->n_comp_units = n_comp_units;
+}
+
+/* Process all loaded DIEs for compilation unit CU, starting at
+ FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
+ unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
+ DW_AT_ranges). If NEED_PC is set, then this function will set
+ *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
+ and record the covered ranges in the addrmap. */
+
+static void
+scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
+ CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ bfd *abfd = objfile->obfd;
+ struct partial_die_info *pdi;
+
+ /* Now, march along the PDI's, descending into ones which have
+ interesting children but skipping the children of the other ones,
+ until we reach the end of the compilation unit. */
+
+ pdi = first_die;
+
+ while (pdi != NULL)
+ {
+ fixup_partial_die (pdi, cu);
+
+ /* Anonymous namespaces have no name but have interesting
+ children, so we need to look at them. Ditto for anonymous
+ enums. */
+
+ if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
+ || pdi->tag == DW_TAG_enumeration_type)
+ {
+ switch (pdi->tag)
+ {
+ case DW_TAG_subprogram:
+ add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
+ break;
+ case DW_TAG_variable:
+ case DW_TAG_typedef:
+ case DW_TAG_union_type:
+ if (!pdi->is_declaration)
+ {
+ add_partial_symbol (pdi, cu);
+ }
+ break;
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ if (!pdi->is_declaration)
+ {
+ add_partial_symbol (pdi, cu);
+ }
+ break;
+ case DW_TAG_enumeration_type:
+ if (!pdi->is_declaration)
+ add_partial_enumeration (pdi, cu);
+ break;
+ case DW_TAG_base_type:
+ case DW_TAG_subrange_type:
+ /* File scope base type definitions are added to the partial
+ symbol table. */
+ add_partial_symbol (pdi, cu);
+ break;
+ case DW_TAG_namespace:
+ add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
+ break;
+ case DW_TAG_module:
+ add_partial_module (pdi, lowpc, highpc, need_pc, cu);
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* If the die has a sibling, skip to the sibling. */
+
+ pdi = pdi->die_sibling;
+ }
+}
+
+/* Functions used to compute the fully scoped name of a partial DIE.
+
+ Normally, this is simple. For C++, the parent DIE's fully scoped
+ name is concatenated with "::" and the partial DIE's name. For
+ Java, the same thing occurs except that "." is used instead of "::".
+ Enumerators are an exception; they use the scope of their parent
+ enumeration type, i.e. the name of the enumeration type is not
+ prepended to the enumerator.
+
+ There are two complexities. One is DW_AT_specification; in this
+ case "parent" means the parent of the target of the specification,
+ instead of the direct parent of the DIE. The other is compilers
+ which do not emit DW_TAG_namespace; in this case we try to guess
+ the fully qualified name of structure types from their members'
+ linkage names. This must be done using the DIE's children rather
+ than the children of any DW_AT_specification target. We only need
+ to do this for structures at the top level, i.e. if the target of
+ any DW_AT_specification (if any; otherwise the DIE itself) does not
+ have a parent. */
+
+/* Compute the scope prefix associated with PDI's parent, in
+ compilation unit CU. The result will be allocated on CU's
+ comp_unit_obstack, or a copy of the already allocated PDI->NAME
+ field. NULL is returned if no prefix is necessary. */
+static char *
+partial_die_parent_scope (struct partial_die_info *pdi,
+ struct dwarf2_cu *cu)
+{
+ char *grandparent_scope;
+ struct partial_die_info *parent, *real_pdi;
+
+ /* We need to look at our parent DIE; if we have a DW_AT_specification,
+ then this means the parent of the specification DIE. */
+
+ real_pdi = pdi;
+ while (real_pdi->has_specification)
+ real_pdi = find_partial_die (real_pdi->spec_offset, cu);
+
+ parent = real_pdi->die_parent;
+ if (parent == NULL)
+ return NULL;
+
+ if (parent->scope_set)
+ return parent->scope;
+
+ fixup_partial_die (parent, cu);
+
+ grandparent_scope = partial_die_parent_scope (parent, cu);
+
+ if (parent->tag == DW_TAG_namespace
+ || parent->tag == DW_TAG_structure_type
+ || parent->tag == DW_TAG_class_type
+ || parent->tag == DW_TAG_interface_type
+ || parent->tag == DW_TAG_union_type)
+ {
+ if (grandparent_scope == NULL)
+ parent->scope = parent->name;
+ else
+ parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
+ parent->name, cu);
+ }
+ else if (parent->tag == DW_TAG_enumeration_type)
+ /* Enumerators should not get the name of the enumeration as a prefix. */
+ parent->scope = grandparent_scope;
+ else
+ {
+ /* FIXME drow/2004-04-01: What should we be doing with
+ function-local names? For partial symbols, we should probably be
+ ignoring them. */
+ complaint (&symfile_complaints,
+ _("unhandled containing DIE tag %d for DIE at %d"),
+ parent->tag, pdi->offset);
+ parent->scope = grandparent_scope;
+ }
+
+ parent->scope_set = 1;
+ return parent->scope;
+}
+
+/* Return the fully scoped name associated with PDI, from compilation unit
+ CU. The result will be allocated with malloc. */
+static char *
+partial_die_full_name (struct partial_die_info *pdi,
+ struct dwarf2_cu *cu)
+{
+ char *parent_scope;
+
+ parent_scope = partial_die_parent_scope (pdi, cu);
+ if (parent_scope == NULL)
+ return NULL;
+ else
+ return typename_concat (NULL, parent_scope, pdi->name, cu);
+}
+
+static void
+add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ CORE_ADDR addr = 0;
+ char *actual_name = NULL;
+ const char *my_prefix;
+ const struct partial_symbol *psym = NULL;
+ CORE_ADDR baseaddr;
+ int built_actual_name = 0;
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ if (pdi_needs_namespace (pdi->tag))
+ {
+ actual_name = partial_die_full_name (pdi, cu);
+ if (actual_name)
+ built_actual_name = 1;
+ }
+
+ if (actual_name == NULL)
+ actual_name = pdi->name;
+
+ switch (pdi->tag)
+ {
+ case DW_TAG_subprogram:
+ if (pdi->is_external || cu->language == language_ada)
+ {
+ /* brobecker/2007-12-26: Normally, only "external" DIEs are part
+ of the global scope. But in Ada, we want to be able to access
+ nested procedures globally. So all Ada subprograms are stored
+ in the global scope. */
+ /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
+ mst_text, objfile); */
+ psym = add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_BLOCK,
+ &objfile->global_psymbols,
+ 0, pdi->lowpc + baseaddr,
+ cu->language, objfile);
}
else
{
- /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
+ /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
mst_file_text, objfile); */
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_BLOCK,
- &objfile->static_psymbols,
- 0, pdi->lowpc + baseaddr, cu_language, objfile);
+ psym = add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_BLOCK,
+ &objfile->static_psymbols,
+ 0, pdi->lowpc + baseaddr,
+ cu->language, objfile);
}
break;
case DW_TAG_variable:
table building. */
if (pdi->locdesc)
- addr = decode_locdesc (pdi->locdesc, objfile, cu_header);
+ addr = decode_locdesc (pdi->locdesc, cu);
if (pdi->locdesc || pdi->has_type)
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_STATIC,
- &objfile->global_psymbols,
- 0, addr + baseaddr, cu_language, objfile);
+ psym = add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_STATIC,
+ &objfile->global_psymbols,
+ 0, addr + baseaddr,
+ cu->language, objfile);
}
else
{
/* Static Variable. Skip symbols without location descriptors. */
if (pdi->locdesc == NULL)
- return;
- addr = decode_locdesc (pdi->locdesc, objfile, cu_header);
- /*prim_record_minimal_symbol (pdi->name, addr + baseaddr,
+ {
+ if (built_actual_name)
+ xfree (actual_name);
+ return;
+ }
+ addr = decode_locdesc (pdi->locdesc, cu);
+ /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
mst_file_data, objfile); */
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_STATIC,
- &objfile->static_psymbols,
- 0, addr + baseaddr, cu_language, objfile);
+ psym = add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_STATIC,
+ &objfile->static_psymbols,
+ 0, addr + baseaddr,
+ cu->language, objfile);
}
break;
case DW_TAG_typedef:
case DW_TAG_base_type:
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_TYPEDEF,
+ case DW_TAG_subrange_type:
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_TYPEDEF,
&objfile->static_psymbols,
- 0, (CORE_ADDR) 0, cu_language, objfile);
+ 0, (CORE_ADDR) 0, cu->language, objfile);
+ break;
+ case DW_TAG_namespace:
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_TYPEDEF,
+ &objfile->global_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, objfile);
break;
case DW_TAG_class_type:
+ case DW_TAG_interface_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_enumeration_type:
- /* Skip aggregate types without children, these are external
- references. */
- if (pdi->has_children == 0)
- return;
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- STRUCT_NAMESPACE, LOC_TYPEDEF,
- &objfile->static_psymbols,
- 0, (CORE_ADDR) 0, cu_language, objfile);
-
- if (cu_language == language_cplus)
+ /* Skip external references. The DWARF standard says in the section
+ about "Structure, Union, and Class Type Entries": "An incomplete
+ structure, union or class type is represented by a structure,
+ union or class entry that does not have a byte size attribute
+ and that has a DW_AT_declaration attribute." */
+ if (!pdi->has_byte_size && pdi->is_declaration)
{
- /* For C++, these implicitly act as typedefs as well. */
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_TYPEDEF,
- &objfile->static_psymbols,
- 0, (CORE_ADDR) 0, cu_language, objfile);
+ if (built_actual_name)
+ xfree (actual_name);
+ return;
}
+
+ /* NOTE: carlton/2003-10-07: See comment in new_symbol about
+ static vs. global. */
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ STRUCT_DOMAIN, LOC_TYPEDEF,
+ (cu->language == language_cplus
+ || cu->language == language_java)
+ ? &objfile->global_psymbols
+ : &objfile->static_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, objfile);
+
break;
case DW_TAG_enumerator:
- add_psymbol_to_list (pdi->name, strlen (pdi->name),
- VAR_NAMESPACE, LOC_CONST,
- &objfile->static_psymbols,
- 0, (CORE_ADDR) 0, cu_language, objfile);
+ add_psymbol_to_list (actual_name, strlen (actual_name),
+ built_actual_name,
+ VAR_DOMAIN, LOC_CONST,
+ (cu->language == language_cplus
+ || cu->language == language_java)
+ ? &objfile->global_psymbols
+ : &objfile->static_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, objfile);
break;
default:
break;
}
+
+ /* Check to see if we should scan the name for possible namespace
+ info. Only do this if this is C++, if we don't have namespace
+ debugging info in the file, if the psym is of an appropriate type
+ (otherwise we'll have psym == NULL), and if we actually had a
+ mangled name to begin with. */
+
+ /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
+ cases which do not set PSYM above? */
+
+ if (cu->language == language_cplus
+ && cu->has_namespace_info == 0
+ && psym != NULL
+ && SYMBOL_CPLUS_DEMANGLED_NAME (psym) != NULL)
+ cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym),
+ objfile);
+
+ if (built_actual_name)
+ xfree (actual_name);
}
-/* Expand this partial symbol table into a full symbol table. */
+/* Determine whether a die of type TAG living in a C++ class or
+ namespace needs to have the name of the scope prepended to the
+ name listed in the die. */
-static void
-dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
+static int
+pdi_needs_namespace (enum dwarf_tag tag)
{
- /* FIXME: This is barely more than a stub. */
- if (pst != NULL)
+ switch (tag)
{
- if (pst->readin)
- {
- warning ("bug: psymtab for %s is already read in.", pst->filename);
- }
- else
- {
- if (info_verbose)
- {
- printf_filtered ("Reading in symbols for %s...", pst->filename);
- gdb_flush (gdb_stdout);
- }
-
- psymtab_to_symtab_1 (pst);
-
- /* Finish up the debug error message. */
- if (info_verbose)
- printf_filtered ("done.\n");
- }
+ case DW_TAG_namespace:
+ case DW_TAG_typedef:
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ case DW_TAG_enumeration_type:
+ case DW_TAG_enumerator:
+ return 1;
+ default:
+ return 0;
}
}
+/* Read a partial die corresponding to a namespace; also, add a symbol
+ corresponding to that namespace to the symbol table. NAMESPACE is
+ the name of the enclosing namespace. */
+
static void
-psymtab_to_symtab_1 (struct partial_symtab *pst)
+add_partial_namespace (struct partial_die_info *pdi,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ int need_pc, struct dwarf2_cu *cu)
{
- struct objfile *objfile = pst->objfile;
- bfd *abfd = objfile->obfd;
- struct comp_unit_head cu_header;
- struct die_info *dies;
- unsigned long offset;
- CORE_ADDR lowpc, highpc;
- struct die_info *child_die;
- char *info_ptr;
- struct symtab *symtab;
- struct cleanup *back_to;
+ struct objfile *objfile = cu->objfile;
- /* Set local variables from the partial symbol table info. */
- offset = DWARF_INFO_OFFSET (pst);
- dwarf_info_buffer = DWARF_INFO_BUFFER (pst);
- dwarf_abbrev_buffer = DWARF_ABBREV_BUFFER (pst);
- dwarf_abbrev_size = DWARF_ABBREV_SIZE (pst);
- dwarf_line_buffer = DWARF_LINE_BUFFER (pst);
- dwarf_str_buffer = DWARF_STR_BUFFER (pst);
- dwarf_str_size = DWARF_STR_SIZE (pst);
- baseaddr = ANOFFSET (pst->section_offsets, SECT_OFF_TEXT (objfile));
- cu_header_offset = offset;
- info_ptr = dwarf_info_buffer + offset;
-
- obstack_init (&dwarf2_tmp_obstack);
- back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL);
+ /* Add a symbol for the namespace. */
- buildsym_init ();
- make_cleanup (really_free_pendings, NULL);
+ add_partial_symbol (pdi, cu);
+
+ /* Now scan partial symbols in that namespace. */
+
+ if (pdi->has_children)
+ scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
+}
- /* read in the comp_unit header */
- info_ptr = read_comp_unit_head (&cu_header, info_ptr, abfd);
+/* Read a partial die corresponding to a Fortran module. */
- /* Read the abbrevs for this compilation unit */
- dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);
- make_cleanup (dwarf2_empty_abbrev_table, NULL);
+static void
+add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
+ CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
+{
+ /* Now scan partial symbols in that module.
- dies = read_comp_unit (info_ptr, abfd, &cu_header);
+ FIXME: Support the separate Fortran module namespaces. */
- make_cleanup_free_die_list (dies);
+ if (pdi->has_children)
+ scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
+}
- /* Do line number decoding in read_file_scope () */
- process_die (dies, objfile, &cu_header);
+/* Read a partial die corresponding to a subprogram and create a partial
+ symbol for that subprogram. When the CU language allows it, this
+ routine also defines a partial symbol for each nested subprogram
+ that this subprogram contains.
+
+ DIE my also be a lexical block, in which case we simply search
+ recursively for suprograms defined inside that lexical block.
+ Again, this is only performed when the CU language allows this
+ type of definitions. */
- if (!dwarf2_get_pc_bounds (dies, &lowpc, &highpc, objfile))
+static void
+add_partial_subprogram (struct partial_die_info *pdi,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ int need_pc, struct dwarf2_cu *cu)
+{
+ if (pdi->tag == DW_TAG_subprogram)
{
- /* Some compilers don't define a DW_AT_high_pc attribute for
- the compilation unit. If the DW_AT_high_pc is missing,
- synthesize it, by scanning the DIE's below the compilation unit. */
- highpc = 0;
- if (dies->has_children)
- {
- child_die = dies->next;
- while (child_die && child_die->tag)
+ if (pdi->has_pc_info)
+ {
+ if (pdi->lowpc < *lowpc)
+ *lowpc = pdi->lowpc;
+ if (pdi->highpc > *highpc)
+ *highpc = pdi->highpc;
+ if (need_pc)
{
- if (child_die->tag == DW_TAG_subprogram)
- {
- CORE_ADDR low, high;
-
- if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile))
- {
- highpc = max (highpc, high);
- }
- }
- child_die = sibling_die (child_die);
+ CORE_ADDR baseaddr;
+ struct objfile *objfile = cu->objfile;
+
+ baseaddr = ANOFFSET (objfile->section_offsets,
+ SECT_OFF_TEXT (objfile));
+ addrmap_set_empty (objfile->psymtabs_addrmap,
+ pdi->lowpc, pdi->highpc - 1,
+ cu->per_cu->psymtab);
}
- }
+ if (!pdi->is_declaration)
+ add_partial_symbol (pdi, cu);
+ }
}
- symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
+
+ if (! pdi->has_children)
+ return;
- /* Set symtab language to language from DW_AT_language.
- If the compilation is from a C file generated by language preprocessors,
- do not set the language if it was already deduced by start_subfile. */
- if (symtab != NULL
- && !(cu_language == language_c && symtab->language != language_c))
+ if (cu->language == language_ada)
{
- symtab->language = cu_language;
+ pdi = pdi->die_child;
+ while (pdi != NULL)
+ {
+ fixup_partial_die (pdi, cu);
+ if (pdi->tag == DW_TAG_subprogram
+ || pdi->tag == DW_TAG_lexical_block)
+ add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
+ pdi = pdi->die_sibling;
+ }
}
- pst->symtab = symtab;
- pst->readin = 1;
- sort_symtab_syms (pst->symtab);
-
- do_cleanups (back_to);
}
-/* Process a die and its children. */
+/* See if we can figure out if the class lives in a namespace. We do
+ this by looking for a member function; its demangled name will
+ contain namespace info, if there is any. */
static void
-process_die (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+guess_structure_name (struct partial_die_info *struct_pdi,
+ struct dwarf2_cu *cu)
{
- switch (die->tag)
+ if ((cu->language == language_cplus
+ || cu->language == language_java)
+ && cu->has_namespace_info == 0
+ && struct_pdi->has_children)
{
- case DW_TAG_padding:
- break;
- case DW_TAG_compile_unit:
- read_file_scope (die, objfile, cu_header);
- break;
- case DW_TAG_subprogram:
- read_subroutine_type (die, objfile, cu_header);
- read_func_scope (die, objfile, cu_header);
- break;
- case DW_TAG_inlined_subroutine:
- /* FIXME: These are ignored for now.
- They could be used to set breakpoints on all inlined instances
- of a function and make GDB `next' properly over inlined functions. */
- break;
- case DW_TAG_lexical_block:
- read_lexical_block_scope (die, objfile, cu_header);
- break;
- case DW_TAG_class_type:
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- read_structure_scope (die, objfile, cu_header);
- break;
- case DW_TAG_enumeration_type:
- read_enumeration (die, objfile, cu_header);
- break;
- case DW_TAG_subroutine_type:
- read_subroutine_type (die, objfile, cu_header);
- break;
- case DW_TAG_array_type:
- read_array_type (die, objfile, cu_header);
- break;
- case DW_TAG_pointer_type:
- read_tag_pointer_type (die, objfile, cu_header);
- break;
- case DW_TAG_ptr_to_member_type:
- read_tag_ptr_to_member_type (die, objfile, cu_header);
- break;
- case DW_TAG_reference_type:
- read_tag_reference_type (die, objfile, cu_header);
- break;
- case DW_TAG_string_type:
- read_tag_string_type (die, objfile);
- break;
- case DW_TAG_base_type:
- read_base_type (die, objfile);
- if (dwarf_attr (die, DW_AT_name))
- {
- /* Add a typedef symbol for the base type definition. */
- new_symbol (die, die->type, objfile, cu_header);
- }
- break;
- case DW_TAG_common_block:
- read_common_block (die, objfile, cu_header);
- break;
- case DW_TAG_common_inclusion:
- break;
- default:
- new_symbol (die, NULL, objfile, cu_header);
- break;
- }
-}
+ /* NOTE: carlton/2003-10-07: Getting the info this way changes
+ what template types look like, because the demangler
+ frequently doesn't give the same name as the debug info. We
+ could fix this by only using the demangled name to get the
+ prefix (but see comment in read_structure_type). */
-static void
-read_file_scope (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
-{
- unsigned int line_offset = 0;
- CORE_ADDR lowpc = ((CORE_ADDR) -1);
- CORE_ADDR highpc = ((CORE_ADDR) 0);
- struct attribute *attr;
- char *name = "<unknown>";
- char *comp_dir = NULL;
- struct die_info *child_die;
- bfd *abfd = objfile->obfd;
+ struct partial_die_info *child_pdi = struct_pdi->die_child;
+ struct partial_die_info *real_pdi;
- if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
- {
- if (die->has_children)
+ /* If this DIE (this DIE's specification, if any) has a parent, then
+ we should not do this. We'll prepend the parent's fully qualified
+ name when we create the partial symbol. */
+
+ real_pdi = struct_pdi;
+ while (real_pdi->has_specification)
+ real_pdi = find_partial_die (real_pdi->spec_offset, cu);
+
+ if (real_pdi->die_parent != NULL)
+ return;
+
+ while (child_pdi != NULL)
{
- child_die = die->next;
- while (child_die && child_die->tag)
+ if (child_pdi->tag == DW_TAG_subprogram)
{
- if (child_die->tag == DW_TAG_subprogram)
+ char *actual_class_name
+ = language_class_name_from_physname (cu->language_defn,
+ child_pdi->name);
+ if (actual_class_name != NULL)
{
- CORE_ADDR low, high;
-
- if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile))
- {
- lowpc = min (lowpc, low);
- highpc = max (highpc, high);
- }
+ struct_pdi->name
+ = obsavestring (actual_class_name,
+ strlen (actual_class_name),
+ &cu->comp_unit_obstack);
+ xfree (actual_class_name);
}
- child_die = sibling_die (child_die);
+ break;
}
+
+ child_pdi = child_pdi->die_sibling;
}
}
+}
- /* If we didn't find a lowpc, set it to highpc to avoid complaints
- from finish_block. */
- if (lowpc == ((CORE_ADDR) -1))
- lowpc = highpc;
- lowpc += baseaddr;
- highpc += baseaddr;
+/* Read a partial die corresponding to an enumeration type. */
- attr = dwarf_attr (die, DW_AT_name);
- if (attr)
- {
- name = DW_STRING (attr);
- }
- attr = dwarf_attr (die, DW_AT_comp_dir);
- if (attr)
- {
- comp_dir = DW_STRING (attr);
- if (comp_dir)
- {
- /* Irix 6.2 native cc prepends <machine>.: to the compilation
- directory, get rid of it. */
- char *cp = strchr (comp_dir, ':');
+static void
+add_partial_enumeration (struct partial_die_info *enum_pdi,
+ struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ bfd *abfd = objfile->obfd;
+ struct partial_die_info *pdi;
- if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
- comp_dir = cp + 1;
- }
- }
+ if (enum_pdi->name != NULL)
+ add_partial_symbol (enum_pdi, cu);
- if (objfile->ei.entry_point >= lowpc &&
- objfile->ei.entry_point < highpc)
+ pdi = enum_pdi->die_child;
+ while (pdi)
{
- objfile->ei.entry_file_lowpc = lowpc;
- objfile->ei.entry_file_highpc = highpc;
+ if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
+ complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
+ else
+ add_partial_symbol (pdi, cu);
+ pdi = pdi->die_sibling;
}
+}
- attr = dwarf_attr (die, DW_AT_language);
- if (attr)
- {
- set_cu_language (DW_UNSND (attr));
- }
+/* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
+ Return the corresponding abbrev, or NULL if the number is zero (indicating
+ an empty DIE). In either case *BYTES_READ will be set to the length of
+ the initial number. */
- /* We assume that we're processing GCC output. */
- processing_gcc_compilation = 2;
-#if 0
- /* FIXME:Do something here. */
- if (dip->at_producer != NULL)
+static struct abbrev_info *
+peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
+ struct dwarf2_cu *cu)
+{
+ bfd *abfd = cu->objfile->obfd;
+ unsigned int abbrev_number;
+ struct abbrev_info *abbrev;
+
+ abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
+
+ if (abbrev_number == 0)
+ return NULL;
+
+ abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
+ if (!abbrev)
{
- handle_producer (dip->at_producer);
+ error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
+ bfd_get_filename (abfd));
}
-#endif
- /* The compilation unit may be in a different language or objfile,
- zero out all remembered fundamental types. */
- memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *));
+ return abbrev;
+}
- start_symtab (name, comp_dir, lowpc);
- record_debugformat ("DWARF 2");
+/* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
+ Returns a pointer to the end of a series of DIEs, terminated by an empty
+ DIE. Any children of the skipped DIEs will also be skipped. */
- /* Decode line number information if present. */
- attr = dwarf_attr (die, DW_AT_stmt_list);
- if (attr)
+static gdb_byte *
+skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
+{
+ struct abbrev_info *abbrev;
+ unsigned int bytes_read;
+
+ while (1)
{
- line_offset = DW_UNSND (attr);
- dwarf_decode_lines (line_offset, comp_dir, abfd, cu_header);
+ abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
+ if (abbrev == NULL)
+ return info_ptr + bytes_read;
+ else
+ info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
}
+}
- /* Process all dies in compilation unit. */
- if (die->has_children)
+/* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
+ INFO_PTR should point just after the initial uleb128 of a DIE, and the
+ abbrev corresponding to that skipped uleb128 should be passed in
+ ABBREV. Returns a pointer to this DIE's sibling, skipping any
+ children. */
+
+static gdb_byte *
+skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
+ struct abbrev_info *abbrev, struct dwarf2_cu *cu)
+{
+ unsigned int bytes_read;
+ struct attribute attr;
+ bfd *abfd = cu->objfile->obfd;
+ unsigned int form, i;
+
+ for (i = 0; i < abbrev->num_attrs; i++)
{
- child_die = die->next;
- while (child_die && child_die->tag)
+ /* The only abbrev we care about is DW_AT_sibling. */
+ if (abbrev->attrs[i].name == DW_AT_sibling)
{
- process_die (child_die, objfile, cu_header);
- child_die = sibling_die (child_die);
+ read_attribute (&attr, &abbrev->attrs[i],
+ abfd, info_ptr, cu);
+ if (attr.form == DW_FORM_ref_addr)
+ complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
+ else
+ return buffer + dwarf2_get_ref_die_offset (&attr);
+ }
+
+ /* If it isn't DW_AT_sibling, skip this attribute. */
+ form = abbrev->attrs[i].form;
+ skip_attribute:
+ switch (form)
+ {
+ case DW_FORM_addr:
+ case DW_FORM_ref_addr:
+ info_ptr += cu->header.addr_size;
+ break;
+ case DW_FORM_data1:
+ case DW_FORM_ref1:
+ case DW_FORM_flag:
+ info_ptr += 1;
+ break;
+ case DW_FORM_data2:
+ case DW_FORM_ref2:
+ info_ptr += 2;
+ break;
+ case DW_FORM_data4:
+ case DW_FORM_ref4:
+ info_ptr += 4;
+ break;
+ case DW_FORM_data8:
+ case DW_FORM_ref8:
+ case DW_FORM_sig8:
+ info_ptr += 8;
+ break;
+ case DW_FORM_string:
+ read_string (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_strp:
+ info_ptr += cu->header.offset_size;
+ break;
+ case DW_FORM_block:
+ info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_block1:
+ info_ptr += 1 + read_1_byte (abfd, info_ptr);
+ break;
+ case DW_FORM_block2:
+ info_ptr += 2 + read_2_bytes (abfd, info_ptr);
+ break;
+ case DW_FORM_block4:
+ info_ptr += 4 + read_4_bytes (abfd, info_ptr);
+ break;
+ case DW_FORM_sdata:
+ case DW_FORM_udata:
+ case DW_FORM_ref_udata:
+ info_ptr = skip_leb128 (abfd, info_ptr);
+ break;
+ case DW_FORM_indirect:
+ form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ /* We need to continue parsing from here, so just go back to
+ the top. */
+ goto skip_attribute;
+
+ default:
+ error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
+ dwarf_form_name (form),
+ bfd_get_filename (abfd));
}
}
+
+ if (abbrev->has_children)
+ return skip_children (buffer, info_ptr, cu);
+ else
+ return info_ptr;
}
-static void
-read_func_scope (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+/* Locate ORIG_PDI's sibling.
+ INFO_PTR should point to the start of the next DIE after ORIG_PDI
+ in BUFFER. */
+
+static gdb_byte *
+locate_pdi_sibling (struct partial_die_info *orig_pdi,
+ gdb_byte *buffer, gdb_byte *info_ptr,
+ bfd *abfd, struct dwarf2_cu *cu)
{
- register struct context_stack *new;
- CORE_ADDR lowpc;
- CORE_ADDR highpc;
- struct die_info *child_die;
- struct attribute *attr;
- char *name;
+ /* Do we know the sibling already? */
- name = dwarf2_linkage_name (die);
+ if (orig_pdi->sibling)
+ return orig_pdi->sibling;
- /* Ignore functions with missing or empty names and functions with
- missing or invalid low and high pc attributes. */
- if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
- return;
+ /* Are there any children to deal with? */
- lowpc += baseaddr;
- highpc += baseaddr;
+ if (!orig_pdi->has_children)
+ return info_ptr;
- if (objfile->ei.entry_point >= lowpc &&
- objfile->ei.entry_point < highpc)
- {
- objfile->ei.entry_func_lowpc = lowpc;
- objfile->ei.entry_func_highpc = highpc;
- }
+ /* Skip the children the long way. */
- /* Decode DW_AT_frame_base location descriptor if present, keep result
- for DW_OP_fbreg operands in decode_locdesc. */
- frame_base_reg = -1;
- frame_base_offset = 0;
- attr = dwarf_attr (die, DW_AT_frame_base);
- if (attr)
+ return skip_children (buffer, info_ptr, cu);
+}
+
+/* Expand this partial symbol table into a full symbol table. */
+
+static void
+dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
+{
+ /* FIXME: This is barely more than a stub. */
+ if (pst != NULL)
{
- CORE_ADDR addr = decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
- if (isderef)
- complain (&dwarf2_unsupported_at_frame_base, name);
- else if (isreg)
- frame_base_reg = addr;
- else if (offreg)
+ if (pst->readin)
{
- frame_base_reg = basereg;
- frame_base_offset = addr;
+ warning (_("bug: psymtab for %s is already read in."), pst->filename);
}
else
- complain (&dwarf2_unsupported_at_frame_base, name);
- }
+ {
+ if (info_verbose)
+ {
+ printf_filtered (_("Reading in symbols for %s..."), pst->filename);
+ gdb_flush (gdb_stdout);
+ }
- new = push_context (0, lowpc);
- new->name = new_symbol (die, die->type, objfile, cu_header);
- list_in_scope = &local_symbols;
+ /* Restore our global data. */
+ dwarf2_per_objfile = objfile_data (pst->objfile,
+ dwarf2_objfile_data_key);
- if (die->has_children)
- {
- child_die = die->next;
- while (child_die && child_die->tag)
- {
- process_die (child_die, objfile, cu_header);
- child_die = sibling_die (child_die);
+ /* If this psymtab is constructed from a debug-only objfile, the
+ has_section_at_zero flag will not necessarily be correct. We
+ can get the correct value for this flag by looking at the data
+ associated with the (presumably stripped) associated objfile. */
+ if (pst->objfile->separate_debug_objfile_backlink)
+ {
+ struct dwarf2_per_objfile *dpo_backlink
+ = objfile_data (pst->objfile->separate_debug_objfile_backlink,
+ dwarf2_objfile_data_key);
+ dwarf2_per_objfile->has_section_at_zero
+ = dpo_backlink->has_section_at_zero;
+ }
+
+ psymtab_to_symtab_1 (pst);
+
+ /* Finish up the debug error message. */
+ if (info_verbose)
+ printf_filtered (_("done.\n"));
}
}
+}
- new = pop_context ();
- /* Make a block for the local symbols within. */
- finish_block (new->name, &local_symbols, new->old_blocks,
- lowpc, highpc, objfile);
- list_in_scope = &file_symbols;
+/* Add PER_CU to the queue. */
+
+static void
+queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
+{
+ struct dwarf2_queue_item *item;
+
+ per_cu->queued = 1;
+ item = xmalloc (sizeof (*item));
+ item->per_cu = per_cu;
+ item->next = NULL;
+
+ if (dwarf2_queue == NULL)
+ dwarf2_queue = item;
+ else
+ dwarf2_queue_tail->next = item;
+
+ dwarf2_queue_tail = item;
}
-/* Process all the DIES contained within a lexical block scope. Start
- a new scope, process the dies, and then close the scope. */
+/* Process the queue. */
static void
-read_lexical_block_scope (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+process_queue (struct objfile *objfile)
{
- register struct context_stack *new;
- CORE_ADDR lowpc, highpc;
- struct die_info *child_die;
+ struct dwarf2_queue_item *item, *next_item;
- /* Ignore blocks with missing or invalid low and high pc attributes. */
- if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
- return;
- lowpc += baseaddr;
- highpc += baseaddr;
+ /* The queue starts out with one item, but following a DIE reference
+ may load a new CU, adding it to the end of the queue. */
+ for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
+ {
+ if (item->per_cu->psymtab && !item->per_cu->psymtab->readin)
+ process_full_comp_unit (item->per_cu);
- push_context (0, lowpc);
- if (die->has_children)
+ item->per_cu->queued = 0;
+ next_item = item->next;
+ xfree (item);
+ }
+
+ dwarf2_queue_tail = NULL;
+}
+
+/* Free all allocated queue entries. This function only releases anything if
+ an error was thrown; if the queue was processed then it would have been
+ freed as we went along. */
+
+static void
+dwarf2_release_queue (void *dummy)
+{
+ struct dwarf2_queue_item *item, *last;
+
+ item = dwarf2_queue;
+ while (item)
{
- child_die = die->next;
- while (child_die && child_die->tag)
+ /* Anything still marked queued is likely to be in an
+ inconsistent state, so discard it. */
+ if (item->per_cu->queued)
{
- process_die (child_die, objfile, cu_header);
- child_die = sibling_die (child_die);
+ if (item->per_cu->cu != NULL)
+ free_one_cached_comp_unit (item->per_cu->cu);
+ item->per_cu->queued = 0;
}
- }
- new = pop_context ();
- if (local_symbols != NULL)
- {
- finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
- highpc, objfile);
+ last = item;
+ item = item->next;
+ xfree (last);
}
- local_symbols = new->locals;
+
+ dwarf2_queue = dwarf2_queue_tail = NULL;
}
-/* Get low and high pc attributes from a die.
- Return 1 if the attributes are present and valid, otherwise, return 0. */
+/* Read in full symbols for PST, and anything it depends on. */
-static int
-dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, CORE_ADDR *highpc,
- struct objfile *objfile)
+static void
+psymtab_to_symtab_1 (struct partial_symtab *pst)
{
- struct attribute *attr;
- CORE_ADDR low;
- CORE_ADDR high;
+ struct dwarf2_per_cu_data *per_cu;
+ struct cleanup *back_to;
+ int i;
- attr = dwarf_attr (die, DW_AT_low_pc);
- if (attr)
- low = DW_ADDR (attr);
- else
- return 0;
- attr = dwarf_attr (die, DW_AT_high_pc);
- if (attr)
- high = DW_ADDR (attr);
+ for (i = 0; i < pst->number_of_dependencies; i++)
+ if (!pst->dependencies[i]->readin)
+ {
+ /* Inform about additional files that need to be read in. */
+ if (info_verbose)
+ {
+ /* FIXME: i18n: Need to make this a single string. */
+ fputs_filtered (" ", gdb_stdout);
+ wrap_here ("");
+ fputs_filtered ("and ", gdb_stdout);
+ wrap_here ("");
+ printf_filtered ("%s...", pst->dependencies[i]->filename);
+ wrap_here (""); /* Flush output */
+ gdb_flush (gdb_stdout);
+ }
+ psymtab_to_symtab_1 (pst->dependencies[i]);
+ }
+
+ per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private;
+
+ if (per_cu == NULL)
+ {
+ /* It's an include file, no symbols to read for it.
+ Everything is in the parent symtab. */
+ pst->readin = 1;
+ return;
+ }
+
+ back_to = make_cleanup (dwarf2_release_queue, NULL);
+
+ queue_comp_unit (per_cu, pst->objfile);
+
+ if (per_cu->from_debug_types)
+ read_signatured_type_at_offset (pst->objfile, per_cu->offset);
else
- return 0;
+ load_full_comp_unit (per_cu, pst->objfile);
- if (high < low)
- return 0;
+ process_queue (pst->objfile);
- /* When using the GNU linker, .gnu.linkonce. sections are used to
- eliminate duplicate copies of functions and vtables and such.
- The linker will arbitrarily choose one and discard the others.
- The AT_*_pc values for such functions refer to local labels in
- these sections. If the section from that file was discarded, the
- labels are not in the output, so the relocs get a value of 0.
- If this is a discarded function, mark the pc bounds as invalid,
- so that GDB will ignore it. */
- if (low == 0 && (bfd_get_file_flags (objfile->obfd) & HAS_RELOC) == 0)
- return 0;
+ /* Age the cache, releasing compilation units that have not
+ been used recently. */
+ age_cached_comp_units ();
- *lowpc = low;
- *highpc = high;
- return 1;
+ do_cleanups (back_to);
}
-/* Add an aggregate field to the field list. */
+/* Load the DIEs associated with PER_CU into memory. */
static void
-dwarf2_add_field (struct field_info *fip, struct die_info *die,
- struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
{
- struct nextfield *new_field;
+ bfd *abfd = objfile->obfd;
+ struct dwarf2_cu *cu;
+ unsigned int offset;
+ gdb_byte *info_ptr, *beg_of_comp_unit;
+ struct cleanup *back_to, *free_cu_cleanup;
struct attribute *attr;
- struct field *fp;
- char *fieldname = "";
+ CORE_ADDR baseaddr;
- /* Allocate a new field list entry and link it in. */
- new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
- make_cleanup (xfree, new_field);
- memset (new_field, 0, sizeof (struct nextfield));
- new_field->next = fip->fields;
- fip->fields = new_field;
- fip->nfields++;
+ gdb_assert (! per_cu->from_debug_types);
- /* Handle accessibility and virtuality of field.
- The default accessibility for members is public, the default
- accessibility for inheritance is private. */
- if (die->tag != DW_TAG_inheritance)
- new_field->accessibility = DW_ACCESS_public;
- else
- new_field->accessibility = DW_ACCESS_private;
- new_field->virtuality = DW_VIRTUALITY_none;
+ /* Set local variables from the partial symbol table info. */
+ offset = per_cu->offset;
- attr = dwarf_attr (die, DW_AT_accessibility);
- if (attr)
- new_field->accessibility = DW_UNSND (attr);
- if (new_field->accessibility != DW_ACCESS_public)
- fip->non_public_fields = 1;
- attr = dwarf_attr (die, DW_AT_virtuality);
- if (attr)
- new_field->virtuality = DW_UNSND (attr);
+ info_ptr = dwarf2_per_objfile->info.buffer + offset;
+ beg_of_comp_unit = info_ptr;
- fp = &new_field->field;
- if (die->tag == DW_TAG_member)
- {
- /* Get type of field. */
- fp->type = die_type (die, objfile, cu_header);
+ cu = alloc_one_comp_unit (objfile);
- /* Get bit size of field (zero if none). */
- attr = dwarf_attr (die, DW_AT_bit_size);
- if (attr)
- {
- FIELD_BITSIZE (*fp) = DW_UNSND (attr);
- }
- else
- {
- FIELD_BITSIZE (*fp) = 0;
- }
+ /* If an error occurs while loading, release our storage. */
+ free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
- /* Get bit offset of field. */
- attr = dwarf_attr (die, DW_AT_data_member_location);
- if (attr)
- {
- FIELD_BITPOS (*fp) =
- decode_locdesc (DW_BLOCK (attr), objfile, cu_header) * bits_per_byte;
- }
- else
- FIELD_BITPOS (*fp) = 0;
- attr = dwarf_attr (die, DW_AT_bit_offset);
- if (attr)
- {
- if (BITS_BIG_ENDIAN)
- {
- /* For big endian bits, the DW_AT_bit_offset gives the
- additional bit offset from the MSB of the containing
- anonymous object to the MSB of the field. We don't
- have to do anything special since we don't need to
- know the size of the anonymous object. */
- FIELD_BITPOS (*fp) += DW_UNSND (attr);
- }
- else
- {
- /* For little endian bits, compute the bit offset to the
- MSB of the anonymous object, subtract off the number of
- bits from the MSB of the field to the MSB of the
- object, and then subtract off the number of bits of
- the field itself. The result is the bit offset of
- the LSB of the field. */
- int anonymous_size;
- int bit_offset = DW_UNSND (attr);
+ /* Read in the comp_unit header. */
+ info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
- attr = dwarf_attr (die, DW_AT_byte_size);
- if (attr)
- {
- /* The size of the anonymous object containing
- the bit field is explicit, so use the
- indicated size (in bytes). */
- anonymous_size = DW_UNSND (attr);
- }
- else
- {
- /* The size of the anonymous object containing
- the bit field must be inferred from the type
- attribute of the data member containing the
- bit field. */
- anonymous_size = TYPE_LENGTH (fp->type);
- }
- FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
- - bit_offset - FIELD_BITSIZE (*fp);
- }
- }
+ /* Complete the cu_header. */
+ cu->header.offset = offset;
+ cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
- /* Get name of field. */
- attr = dwarf_attr (die, DW_AT_name);
- if (attr && DW_STRING (attr))
- fieldname = DW_STRING (attr);
- fp->name = obsavestring (fieldname, strlen (fieldname),
- &objfile->type_obstack);
+ /* Read the abbrevs for this compilation unit. */
+ dwarf2_read_abbrevs (abfd, cu);
+ back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
- /* Change accessibility for artificial fields (e.g. virtual table
- pointer or virtual base class pointer) to private. */
- if (dwarf_attr (die, DW_AT_artificial))
- {
- new_field->accessibility = DW_ACCESS_private;
- fip->non_public_fields = 1;
- }
- }
- else if (die->tag == DW_TAG_variable)
- {
- char *physname;
+ /* Link this compilation unit into the compilation unit tree. */
+ per_cu->cu = cu;
+ cu->per_cu = per_cu;
+ cu->type_hash = per_cu->type_hash;
- /* C++ static member.
- Get name of field. */
- attr = dwarf_attr (die, DW_AT_name);
- if (attr && DW_STRING (attr))
- fieldname = DW_STRING (attr);
- else
- return;
+ cu->dies = read_comp_unit (info_ptr, cu);
- /* Get physical name. */
- physname = dwarf2_linkage_name (die);
+ /* We try not to read any attributes in this function, because not
+ all objfiles needed for references have been loaded yet, and symbol
+ table processing isn't initialized. But we have to set the CU language,
+ or we won't be able to build types correctly. */
+ attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
+ if (attr)
+ set_cu_language (DW_UNSND (attr), cu);
+ else
+ set_cu_language (language_minimal, cu);
- SET_FIELD_PHYSNAME (*fp, obsavestring (physname, strlen (physname),
- &objfile->type_obstack));
- FIELD_TYPE (*fp) = die_type (die, objfile, cu_header);
- FIELD_NAME (*fp) = obsavestring (fieldname, strlen (fieldname),
- &objfile->type_obstack);
- }
- else if (die->tag == DW_TAG_inheritance)
- {
- /* C++ base class field. */
- attr = dwarf_attr (die, DW_AT_data_member_location);
- if (attr)
- FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), objfile, cu_header)
- * bits_per_byte);
- FIELD_BITSIZE (*fp) = 0;
- FIELD_TYPE (*fp) = die_type (die, objfile, cu_header);
- FIELD_NAME (*fp) = type_name_no_tag (fp->type);
- fip->nbaseclasses++;
- }
+ /* Link this CU into read_in_chain. */
+ per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
+ dwarf2_per_objfile->read_in_chain = per_cu;
+
+ do_cleanups (back_to);
+
+ /* We've successfully allocated this compilation unit. Let our caller
+ clean it up when finished with it. */
+ discard_cleanups (free_cu_cleanup);
}
-/* Create the vector of fields, and attach it to the type. */
+/* Generate full symbol information for PST and CU, whose DIEs have
+ already been loaded into memory. */
static void
-dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
- struct objfile *objfile)
+process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
{
- int nfields = fip->nfields;
+ struct partial_symtab *pst = per_cu->psymtab;
+ struct dwarf2_cu *cu = per_cu->cu;
+ struct objfile *objfile = pst->objfile;
+ bfd *abfd = objfile->obfd;
+ CORE_ADDR lowpc, highpc;
+ struct symtab *symtab;
+ struct cleanup *back_to;
+ CORE_ADDR baseaddr;
- /* Record the field count, allocate space for the array of fields,
- and create blank accessibility bitfields if necessary. */
- TYPE_NFIELDS (type) = nfields;
- TYPE_FIELDS (type) = (struct field *)
- TYPE_ALLOC (type, sizeof (struct field) * nfields);
- memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- if (fip->non_public_fields)
- {
- ALLOCATE_CPLUS_STRUCT_TYPE (type);
+ buildsym_init ();
+ back_to = make_cleanup (really_free_pendings, NULL);
- TYPE_FIELD_PRIVATE_BITS (type) =
- (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
- B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
+ cu->list_in_scope = &file_symbols;
- TYPE_FIELD_PROTECTED_BITS (type) =
- (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
- B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
+ dwarf2_find_base_address (cu->dies, cu);
- TYPE_FIELD_IGNORE_BITS (type) =
- (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
- B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
- }
+ /* Do line number decoding in read_file_scope () */
+ process_die (cu->dies, cu);
- /* If the type has baseclasses, allocate and clear a bit vector for
- TYPE_FIELD_VIRTUAL_BITS. */
- if (fip->nbaseclasses)
- {
- int num_bytes = B_BYTES (fip->nbaseclasses);
- char *pointer;
+ /* Some compilers don't define a DW_AT_high_pc attribute for the
+ compilation unit. If the DW_AT_high_pc is missing, synthesize
+ it, by scanning the DIE's below the compilation unit. */
+ get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
- ALLOCATE_CPLUS_STRUCT_TYPE (type);
- pointer = (char *) TYPE_ALLOC (type, num_bytes);
- TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
- B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
- TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
- }
+ symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
- /* Copy the saved-up fields into the field vector. Start from the head
- of the list, adding to the tail of the field array, so that they end
- up in the same order in the array in which they were added to the list. */
- while (nfields-- > 0)
+ /* Set symtab language to language from DW_AT_language.
+ If the compilation is from a C file generated by language preprocessors,
+ do not set the language if it was already deduced by start_subfile. */
+ if (symtab != NULL
+ && !(cu->language == language_c && symtab->language != language_c))
{
- TYPE_FIELD (type, nfields) = fip->fields->field;
- switch (fip->fields->accessibility)
- {
- case DW_ACCESS_private:
- SET_TYPE_FIELD_PRIVATE (type, nfields);
- break;
-
- case DW_ACCESS_protected:
- SET_TYPE_FIELD_PROTECTED (type, nfields);
- break;
-
- case DW_ACCESS_public:
- break;
-
- default:
- /* Unknown accessibility. Complain and treat it as public. */
- {
- complain (&dwarf2_unsupported_accessibility,
- fip->fields->accessibility);
- }
- break;
- }
- if (nfields < fip->nbaseclasses)
- {
- switch (fip->fields->virtuality)
- {
- case DW_VIRTUALITY_virtual:
- case DW_VIRTUALITY_pure_virtual:
- SET_TYPE_FIELD_VIRTUAL (type, nfields);
- break;
- }
- }
- fip->fields = fip->fields->next;
+ symtab->language = cu->language;
}
+ pst->symtab = symtab;
+ pst->readin = 1;
+
+ do_cleanups (back_to);
}
-/* Add a member function to the proper fieldlist. */
+/* Process a die and its children. */
static void
-dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
- struct type *type, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+process_die (struct die_info *die, struct dwarf2_cu *cu)
{
- struct attribute *attr;
- struct fnfieldlist *flp;
- int i;
- struct fn_field *fnp;
- char *fieldname;
- char *physname;
- struct nextfnfield *new_fnfield;
-
- /* Get name of member function. */
- attr = dwarf_attr (die, DW_AT_name);
- if (attr && DW_STRING (attr))
- fieldname = DW_STRING (attr);
- else
- return;
-
- /* Get the mangled name. */
- physname = dwarf2_linkage_name (die);
-
- /* Look up member function name in fieldlist. */
- for (i = 0; i < fip->nfnfields; i++)
+ switch (die->tag)
{
- if (STREQ (fip->fnfieldlists[i].name, fieldname))
- break;
- }
+ case DW_TAG_padding:
+ break;
+ case DW_TAG_compile_unit:
+ read_file_scope (die, cu);
+ break;
+ case DW_TAG_type_unit:
+ read_type_unit_scope (die, cu);
+ break;
+ case DW_TAG_subprogram:
+ case DW_TAG_inlined_subroutine:
+ read_func_scope (die, cu);
+ break;
+ case DW_TAG_lexical_block:
+ case DW_TAG_try_block:
+ case DW_TAG_catch_block:
+ read_lexical_block_scope (die, cu);
+ break;
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ process_structure_scope (die, cu);
+ break;
+ case DW_TAG_enumeration_type:
+ process_enumeration_scope (die, cu);
+ break;
- /* Create new list element if necessary. */
- if (i < fip->nfnfields)
- flp = &fip->fnfieldlists[i];
- else
- {
- if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
- {
- fip->fnfieldlists = (struct fnfieldlist *)
- xrealloc (fip->fnfieldlists,
- (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
- * sizeof (struct fnfieldlist));
- if (fip->nfnfields == 0)
- make_cleanup (free_current_contents, &fip->fnfieldlists);
- }
- flp = &fip->fnfieldlists[fip->nfnfields];
- flp->name = fieldname;
- flp->length = 0;
- flp->head = NULL;
- fip->nfnfields++;
- }
-
- /* Create a new member function field and chain it to the field list
- entry. */
- new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
- make_cleanup (xfree, new_fnfield);
- memset (new_fnfield, 0, sizeof (struct nextfnfield));
- new_fnfield->next = flp->head;
- flp->head = new_fnfield;
- flp->length++;
-
- /* Fill in the member function field info. */
- fnp = &new_fnfield->fnfield;
- fnp->physname = obsavestring (physname, strlen (physname),
- &objfile->type_obstack);
- fnp->type = alloc_type (objfile);
- if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC)
- {
- struct type *return_type = TYPE_TARGET_TYPE (die->type);
- struct type **arg_types;
- int nparams = TYPE_NFIELDS (die->type);
- int iparams;
-
- /* Copy argument types from the subroutine type. */
- arg_types = (struct type **)
- TYPE_ALLOC (fnp->type, (nparams + 1) * sizeof (struct type *));
- for (iparams = 0; iparams < nparams; iparams++)
- arg_types[iparams] = TYPE_FIELD_TYPE (die->type, iparams);
-
- /* Set last entry in argument type vector. */
- if (TYPE_VARARGS (die->type))
- arg_types[nparams] = NULL;
- else
- arg_types[nparams] = dwarf2_fundamental_type (objfile, FT_VOID);
-
- smash_to_method_type (fnp->type, type, return_type, arg_types);
+ /* These dies have a type, but processing them does not create
+ a symbol or recurse to process the children. Therefore we can
+ read them on-demand through read_type_die. */
+ case DW_TAG_subroutine_type:
+ case DW_TAG_set_type:
+ case DW_TAG_array_type:
+ case DW_TAG_pointer_type:
+ case DW_TAG_ptr_to_member_type:
+ case DW_TAG_reference_type:
+ case DW_TAG_string_type:
+ break;
- /* Handle static member functions.
- Dwarf2 has no clean way to discern C++ static and non-static
- member functions. G++ helps GDB by marking the first
- parameter for non-static member functions (which is the
- this pointer) as artificial. We obtain this information
- from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
- if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0)
- fnp->voffset = VOFFSET_STATIC;
+ case DW_TAG_base_type:
+ case DW_TAG_subrange_type:
+ case DW_TAG_typedef:
+ /* Add a typedef symbol for the type definition, if it has a
+ DW_AT_name. */
+ new_symbol (die, read_type_die (die, cu), cu);
+ break;
+ case DW_TAG_common_block:
+ read_common_block (die, cu);
+ break;
+ case DW_TAG_common_inclusion:
+ break;
+ case DW_TAG_namespace:
+ processing_has_namespace_info = 1;
+ read_namespace (die, cu);
+ break;
+ case DW_TAG_module:
+ read_module (die, cu);
+ break;
+ case DW_TAG_imported_declaration:
+ case DW_TAG_imported_module:
+ processing_has_namespace_info = 1;
+ if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
+ || cu->language != language_fortran))
+ complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
+ dwarf_tag_name (die->tag));
+ read_import_statement (die, cu);
+ break;
+ default:
+ new_symbol (die, NULL, cu);
+ break;
}
- else
- complain (&dwarf2_missing_member_fn_type_complaint, physname);
-
- /* Get fcontext from DW_AT_containing_type if present. */
- if (dwarf_attr (die, DW_AT_containing_type) != NULL)
- fnp->fcontext = die_containing_type (die, objfile, cu_header);
+}
- /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
- and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
+/* Return the fully qualified name of DIE, based on its DW_AT_name.
+ If scope qualifiers are appropriate they will be added. The result
+ will be allocated on the objfile_obstack, or NULL if the DIE does
+ not have a name. */
- /* Get accessibility. */
- attr = dwarf_attr (die, DW_AT_accessibility);
- if (attr)
- {
- switch (DW_UNSND (attr))
- {
- case DW_ACCESS_private:
- fnp->is_private = 1;
- break;
- case DW_ACCESS_protected:
- fnp->is_protected = 1;
- break;
- }
- }
+static const char *
+dwarf2_full_name (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
+ char *prefix, *name;
+ struct ui_file *buf = NULL;
- /* Check for artificial methods. */
- attr = dwarf_attr (die, DW_AT_artificial);
- if (attr && DW_UNSND (attr) != 0)
- fnp->is_artificial = 1;
+ name = dwarf2_name (die, cu);
+ if (!name)
+ return NULL;
- /* Get index in virtual function table if it is a virtual member function. */
- attr = dwarf_attr (die, DW_AT_vtable_elem_location);
- if (attr)
- fnp->voffset = decode_locdesc (DW_BLOCK (attr), objfile, cu_header) + 2;
+ /* These are the only languages we know how to qualify names in. */
+ if (cu->language != language_cplus
+ && cu->language != language_java)
+ return name;
+
+ /* If no prefix is necessary for this type of DIE, return the
+ unqualified name. The other three tags listed could be handled
+ in pdi_needs_namespace, but that requires broader changes. */
+ if (!pdi_needs_namespace (die->tag)
+ && die->tag != DW_TAG_subprogram
+ && die->tag != DW_TAG_variable
+ && die->tag != DW_TAG_member)
+ return name;
+
+ prefix = determine_prefix (die, cu);
+ if (*prefix != '\0')
+ name = typename_concat (&cu->objfile->objfile_obstack, prefix,
+ name, cu);
+
+ return name;
}
-/* Create the vector of member function fields, and attach it to the type. */
+/* Read the import statement specified by the given die and record it. */
static void
-dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
- struct objfile *objfile)
+read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
{
- struct fnfieldlist *flp;
- int total_length = 0;
- int i;
+ struct attribute *import_attr;
+ struct die_info *imported_die;
+ struct dwarf2_cu *imported_cu;
+ const char *imported_name;
+ const char *imported_name_prefix;
+ const char *import_prefix;
+ char *canonical_name;
+
+ import_attr = dwarf2_attr (die, DW_AT_import, cu);
+ if (import_attr == NULL)
+ {
+ complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
+ dwarf_tag_name (die->tag));
+ return;
+ }
- ALLOCATE_CPLUS_STRUCT_TYPE (type);
- TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
- TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
+ imported_cu = cu;
+ imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
+ imported_name = dwarf2_name (imported_die, imported_cu);
+ if (imported_name == NULL)
+ {
+ /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
+
+ The import in the following code:
+ namespace A
+ {
+ typedef int B;
+ }
+
+ int main ()
+ {
+ using A::B;
+ B b;
+ return b;
+ }
+
+ ...
+ <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
+ <52> DW_AT_decl_file : 1
+ <53> DW_AT_decl_line : 6
+ <54> DW_AT_import : <0x75>
+ <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
+ <59> DW_AT_name : B
+ <5b> DW_AT_decl_file : 1
+ <5c> DW_AT_decl_line : 2
+ <5d> DW_AT_type : <0x6e>
+ ...
+ <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
+ <76> DW_AT_byte_size : 4
+ <77> DW_AT_encoding : 5 (signed)
+
+ imports the wrong die ( 0x75 instead of 0x58 ).
+ This case will be ignored until the gcc bug is fixed. */
+ return;
+ }
- for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
- {
- struct nextfnfield *nfp = flp->head;
- struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
- int k;
+ /* FIXME: dwarf2_name (die); for the local name after import. */
- TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
- TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
- fn_flp->fn_fields = (struct fn_field *)
- TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
- for (k = flp->length; (k--, nfp); nfp = nfp->next)
- fn_flp->fn_fields[k] = nfp->fnfield;
+ /* Figure out where the statement is being imported to. */
+ import_prefix = determine_prefix (die, cu);
- total_length += flp->length;
+ /* Figure out what the scope of the imported die is and prepend it
+ to the name of the imported die. */
+ imported_name_prefix = determine_prefix (imported_die, imported_cu);
+
+ if (strlen (imported_name_prefix) > 0)
+ {
+ canonical_name = alloca (strlen (imported_name_prefix) + 2 + strlen (imported_name) + 1);
+ strcpy (canonical_name, imported_name_prefix);
+ strcat (canonical_name, "::");
+ strcat (canonical_name, imported_name);
+ }
+ else
+ {
+ canonical_name = alloca (strlen (imported_name) + 1);
+ strcpy (canonical_name, imported_name);
}
- TYPE_NFN_FIELDS (type) = fip->nfnfields;
- TYPE_NFN_FIELDS_TOTAL (type) = total_length;
+ using_directives = cp_add_using (import_prefix,canonical_name, using_directives);
}
-/* Called when we find the DIE that starts a structure or union scope
- (definition) to process all dies that define the members of the
- structure or union.
+static void
+initialize_cu_func_list (struct dwarf2_cu *cu)
+{
+ cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
+}
- NOTE: we need to call struct_type regardless of whether or not the
- DIE has an at_name attribute, since it might be an anonymous
- structure or union. This gets the type entered into our set of
- user defined types.
+static void
+free_cu_line_header (void *arg)
+{
+ struct dwarf2_cu *cu = arg;
- However, if the structure is incomplete (an opaque struct/union)
- then suppress creating a symbol table entry for it since gdb only
- wants to find the one with the complete definition. Note that if
- it is complete, we just call new_symbol, which does it's own
- checking about whether the struct/union is anonymous or not (and
- suppresses creating a symbol table entry itself). */
+ free_line_header (cu->line_header);
+ cu->line_header = NULL;
+}
static void
-read_structure_scope (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
{
- struct type *type;
+ struct objfile *objfile = cu->objfile;
+ struct comp_unit_head *cu_header = &cu->header;
+ struct cleanup *back_to = make_cleanup (null_cleanup, 0);
+ CORE_ADDR lowpc = ((CORE_ADDR) -1);
+ CORE_ADDR highpc = ((CORE_ADDR) 0);
struct attribute *attr;
+ char *name = NULL;
+ char *comp_dir = NULL;
+ struct die_info *child_die;
+ bfd *abfd = objfile->obfd;
+ struct line_header *line_header = 0;
+ CORE_ADDR baseaddr;
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- type = alloc_type (objfile);
+ get_scope_pc_bounds (die, &lowpc, &highpc, cu);
- INIT_CPLUS_SPECIFIC (type);
- attr = dwarf_attr (die, DW_AT_name);
- if (attr && DW_STRING (attr))
- {
- TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
- strlen (DW_STRING (attr)),
- &objfile->type_obstack);
- }
+ /* If we didn't find a lowpc, set it to highpc to avoid complaints
+ from finish_block. */
+ if (lowpc == ((CORE_ADDR) -1))
+ lowpc = highpc;
+ lowpc += baseaddr;
+ highpc += baseaddr;
- if (die->tag == DW_TAG_structure_type)
+ /* Find the filename. Do not use dwarf2_name here, since the filename
+ is not a source language identifier. */
+ attr = dwarf2_attr (die, DW_AT_name, cu);
+ if (attr)
{
- TYPE_CODE (type) = TYPE_CODE_STRUCT;
+ name = DW_STRING (attr);
}
- else if (die->tag == DW_TAG_union_type)
+
+ attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
+ if (attr)
+ comp_dir = DW_STRING (attr);
+ else if (name != NULL && IS_ABSOLUTE_PATH (name))
{
- TYPE_CODE (type) = TYPE_CODE_UNION;
+ comp_dir = ldirname (name);
+ if (comp_dir != NULL)
+ make_cleanup (xfree, comp_dir);
}
- else
+ if (comp_dir != NULL)
{
- /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
- in gdbtypes.h. */
- TYPE_CODE (type) = TYPE_CODE_CLASS;
+ /* Irix 6.2 native cc prepends <machine>.: to the compilation
+ directory, get rid of it. */
+ char *cp = strchr (comp_dir, ':');
+
+ if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
+ comp_dir = cp + 1;
}
- attr = dwarf_attr (die, DW_AT_byte_size);
+ if (name == NULL)
+ name = "<unknown>";
+
+ attr = dwarf2_attr (die, DW_AT_language, cu);
if (attr)
{
- TYPE_LENGTH (type) = DW_UNSND (attr);
- }
- else
- {
- TYPE_LENGTH (type) = 0;
+ set_cu_language (DW_UNSND (attr), cu);
}
- /* We need to add the type field to the die immediately so we don't
- infinitely recurse when dealing with pointers to the structure
- type within the structure itself. */
- die->type = type;
+ attr = dwarf2_attr (die, DW_AT_producer, cu);
+ if (attr)
+ cu->producer = DW_STRING (attr);
- if (die->has_children && ! die_is_declaration (die))
- {
- struct field_info fi;
- struct die_info *child_die;
- struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
+ /* We assume that we're processing GCC output. */
+ processing_gcc_compilation = 2;
- memset (&fi, 0, sizeof (struct field_info));
+ processing_has_namespace_info = 0;
+
+ start_symtab (name, comp_dir, lowpc);
+ record_debugformat ("DWARF 2");
+ record_producer (cu->producer);
- child_die = die->next;
+ initialize_cu_func_list (cu);
+
+ /* Decode line number information if present. We do this before
+ processing child DIEs, so that the line header table is available
+ for DW_AT_decl_file. */
+ attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
+ if (attr)
+ {
+ unsigned int line_offset = DW_UNSND (attr);
+ line_header = dwarf_decode_line_header (line_offset, abfd, cu);
+ if (line_header)
+ {
+ cu->line_header = line_header;
+ make_cleanup (free_cu_line_header, cu);
+ dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
+ }
+ }
+ /* Process all dies in compilation unit. */
+ if (die->child != NULL)
+ {
+ child_die = die->child;
while (child_die && child_die->tag)
{
- if (child_die->tag == DW_TAG_member)
- {
- dwarf2_add_field (&fi, child_die, objfile, cu_header);
- }
- else if (child_die->tag == DW_TAG_variable)
- {
- /* C++ static member. */
- dwarf2_add_field (&fi, child_die, objfile, cu_header);
- }
- else if (child_die->tag == DW_TAG_subprogram)
- {
- /* C++ member function. */
- process_die (child_die, objfile, cu_header);
- dwarf2_add_member_fn (&fi, child_die, type, objfile, cu_header);
- }
- else if (child_die->tag == DW_TAG_inheritance)
- {
- /* C++ base class field. */
- dwarf2_add_field (&fi, child_die, objfile, cu_header);
- }
- else
- {
- process_die (child_die, objfile, cu_header);
- }
+ process_die (child_die, cu);
child_die = sibling_die (child_die);
}
+ }
- /* Attach fields and member functions to the type. */
- if (fi.nfields)
- dwarf2_attach_fields_to_type (&fi, type, objfile);
- if (fi.nfnfields)
- {
- dwarf2_attach_fn_fields_to_type (&fi, type, objfile);
+ /* Decode macro information, if present. Dwarf 2 macro information
+ refers to information in the line number info statement program
+ header, so we can only read it if we've read the header
+ successfully. */
+ attr = dwarf2_attr (die, DW_AT_macro_info, cu);
+ if (attr && line_header)
+ {
+ unsigned int macro_offset = DW_UNSND (attr);
+ dwarf_decode_macros (line_header, macro_offset,
+ comp_dir, abfd, cu);
+ }
+ do_cleanups (back_to);
+}
- /* Get the type which refers to the base class (possibly this
- class itself) which contains the vtable pointer for the current
- class from the DW_AT_containing_type attribute. */
+/* For TUs we want to skip the first top level sibling if it's not the
+ actual type being defined by this TU. In this case the first top
+ level sibling is there to provide context only. */
- if (dwarf_attr (die, DW_AT_containing_type) != NULL)
- {
- struct type *t = die_containing_type (die, objfile, cu_header);
+static void
+read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct cleanup *back_to = make_cleanup (null_cleanup, 0);
+ CORE_ADDR lowpc;
+ struct attribute *attr;
+ char *name = NULL;
+ char *comp_dir = NULL;
+ struct die_info *child_die;
+ bfd *abfd = objfile->obfd;
+ struct line_header *line_header = 0;
- TYPE_VPTR_BASETYPE (type) = t;
- if (type == t)
- {
- static const char vptr_name[] =
- {'_', 'v', 'p', 't', 'r', '\0'};
- int i;
+ /* start_symtab needs a low pc, but we don't really have one.
+ Do what read_file_scope would do in the absence of such info. */
+ lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- /* Our own class provides vtbl ptr. */
- for (i = TYPE_NFIELDS (t) - 1;
- i >= TYPE_N_BASECLASSES (t);
- --i)
- {
- char *fieldname = TYPE_FIELD_NAME (t, i);
+ /* Find the filename. Do not use dwarf2_name here, since the filename
+ is not a source language identifier. */
+ attr = dwarf2_attr (die, DW_AT_name, cu);
+ if (attr)
+ name = DW_STRING (attr);
- if (STREQN (fieldname, vptr_name, strlen (vptr_name) - 1)
- && is_cplus_marker (fieldname[strlen (vptr_name)]))
- {
- TYPE_VPTR_FIELDNO (type) = i;
- break;
- }
- }
+ attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
+ if (attr)
+ comp_dir = DW_STRING (attr);
+ else if (name != NULL && IS_ABSOLUTE_PATH (name))
+ {
+ comp_dir = ldirname (name);
+ if (comp_dir != NULL)
+ make_cleanup (xfree, comp_dir);
+ }
- /* Complain if virtual function table field not found. */
- if (i < TYPE_N_BASECLASSES (t))
- complain (&dwarf2_vtbl_not_found_complaint,
- TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : "");
- }
- else
- {
- TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
- }
- }
- }
+ if (name == NULL)
+ name = "<unknown>";
+
+ attr = dwarf2_attr (die, DW_AT_language, cu);
+ if (attr)
+ set_cu_language (DW_UNSND (attr), cu);
- new_symbol (die, type, objfile, cu_header);
+ /* This isn't technically needed today. It is done for symmetry
+ with read_file_scope. */
+ attr = dwarf2_attr (die, DW_AT_producer, cu);
+ if (attr)
+ cu->producer = DW_STRING (attr);
- do_cleanups (back_to);
+ /* We assume that we're processing GCC output. */
+ processing_gcc_compilation = 2;
+
+ processing_has_namespace_info = 0;
+
+ start_symtab (name, comp_dir, lowpc);
+ record_debugformat ("DWARF 2");
+ record_producer (cu->producer);
+
+ /* Process the dies in the type unit. */
+ if (die->child == NULL)
+ {
+ dump_die_for_error (die);
+ error (_("Dwarf Error: Missing children for type unit [in module %s]"),
+ bfd_get_filename (abfd));
}
- else
+
+ child_die = die->child;
+
+ while (child_die && child_die->tag)
{
- /* No children, must be stub. */
- TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
+ process_die (child_die, cu);
+
+ child_die = sibling_die (child_die);
}
- finish_cv_type (die->type);
+ do_cleanups (back_to);
}
-/* Given a pointer to a die which begins an enumeration, process all
- the dies that define the members of the enumeration.
+static void
+add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
+ struct dwarf2_cu *cu)
+{
+ struct function_range *thisfn;
+
+ thisfn = (struct function_range *)
+ obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
+ thisfn->name = name;
+ thisfn->lowpc = lowpc;
+ thisfn->highpc = highpc;
+ thisfn->seen_line = 0;
+ thisfn->next = NULL;
+
+ if (cu->last_fn == NULL)
+ cu->first_fn = thisfn;
+ else
+ cu->last_fn->next = thisfn;
- This will be much nicer in draft 6 of the DWARF spec when our
- members will be dies instead squished into the DW_AT_element_list
- attribute.
+ cu->last_fn = thisfn;
+}
- NOTE: We reverse the order of the element list. */
+/* qsort helper for inherit_abstract_dies. */
+
+static int
+unsigned_int_compar (const void *ap, const void *bp)
+{
+ unsigned int a = *(unsigned int *) ap;
+ unsigned int b = *(unsigned int *) bp;
+
+ return (a > b) - (b > a);
+}
+
+/* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
+ Inherit only the children of the DW_AT_abstract_origin DIE not being already
+ referenced by DW_AT_abstract_origin from the children of the current DIE. */
static void
-read_enumeration (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
{
struct die_info *child_die;
- struct type *type;
- struct field *fields;
+ unsigned die_children_count;
+ /* CU offsets which were referenced by children of the current DIE. */
+ unsigned *offsets;
+ unsigned *offsets_end, *offsetp;
+ /* Parent of DIE - referenced by DW_AT_abstract_origin. */
+ struct die_info *origin_die;
+ /* Iterator of the ORIGIN_DIE children. */
+ struct die_info *origin_child_die;
+ struct cleanup *cleanups;
struct attribute *attr;
- struct symbol *sym;
- int num_fields;
- int unsigned_enum = 1;
- type = alloc_type (objfile);
+ attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
+ if (!attr)
+ return;
- TYPE_CODE (type) = TYPE_CODE_ENUM;
- attr = dwarf_attr (die, DW_AT_name);
- if (attr && DW_STRING (attr))
- {
- TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
- strlen (DW_STRING (attr)),
- &objfile->type_obstack);
- }
+ origin_die = follow_die_ref (die, attr, &cu);
+ if (die->tag != origin_die->tag
+ && !(die->tag == DW_TAG_inlined_subroutine
+ && origin_die->tag == DW_TAG_subprogram))
+ complaint (&symfile_complaints,
+ _("DIE 0x%x and its abstract origin 0x%x have different tags"),
+ die->offset, origin_die->offset);
- attr = dwarf_attr (die, DW_AT_byte_size);
- if (attr)
- {
- TYPE_LENGTH (type) = DW_UNSND (attr);
- }
- else
+ child_die = die->child;
+ die_children_count = 0;
+ while (child_die && child_die->tag)
{
- TYPE_LENGTH (type) = 0;
+ child_die = sibling_die (child_die);
+ die_children_count++;
}
+ offsets = xmalloc (sizeof (*offsets) * die_children_count);
+ cleanups = make_cleanup (xfree, offsets);
- num_fields = 0;
- fields = NULL;
- if (die->has_children)
+ offsets_end = offsets;
+ child_die = die->child;
+ while (child_die && child_die->tag)
{
- child_die = die->next;
- while (child_die && child_die->tag)
+ /* For each CHILD_DIE, find the corresponding child of
+ ORIGIN_DIE. If there is more than one layer of
+ DW_AT_abstract_origin, follow them all; there shouldn't be,
+ but GCC versions at least through 4.4 generate this (GCC PR
+ 40573). */
+ struct die_info *child_origin_die = child_die;
+ while (1)
{
- if (child_die->tag != DW_TAG_enumerator)
- {
- process_die (child_die, objfile, cu_header);
- }
- else
- {
- attr = dwarf_attr (child_die, DW_AT_name);
- if (attr)
- {
- sym = new_symbol (child_die, type, objfile, cu_header);
- if (SYMBOL_VALUE (sym) < 0)
- unsigned_enum = 0;
-
- if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
- {
- fields = (struct field *)
- xrealloc (fields,
- (num_fields + DW_FIELD_ALLOC_CHUNK)
- * sizeof (struct field));
- }
-
- FIELD_NAME (fields[num_fields]) = SYMBOL_NAME (sym);
- FIELD_TYPE (fields[num_fields]) = NULL;
- FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym);
- FIELD_BITSIZE (fields[num_fields]) = 0;
-
- num_fields++;
- }
- }
-
- child_die = sibling_die (child_die);
+ attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, cu);
+ if (attr == NULL)
+ break;
+ child_origin_die = follow_die_ref (child_origin_die, attr, &cu);
}
- if (num_fields)
+ /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
+ counterpart may exist. */
+ if (child_origin_die != child_die)
{
- TYPE_NFIELDS (type) = num_fields;
- TYPE_FIELDS (type) = (struct field *)
- TYPE_ALLOC (type, sizeof (struct field) * num_fields);
- memcpy (TYPE_FIELDS (type), fields,
- sizeof (struct field) * num_fields);
- xfree (fields);
+ if (child_die->tag != child_origin_die->tag
+ && !(child_die->tag == DW_TAG_inlined_subroutine
+ && child_origin_die->tag == DW_TAG_subprogram))
+ complaint (&symfile_complaints,
+ _("Child DIE 0x%x and its abstract origin 0x%x have "
+ "different tags"), child_die->offset,
+ child_origin_die->offset);
+ if (child_origin_die->parent != origin_die)
+ complaint (&symfile_complaints,
+ _("Child DIE 0x%x and its abstract origin 0x%x have "
+ "different parents"), child_die->offset,
+ child_origin_die->offset);
+ else
+ *offsets_end++ = child_origin_die->offset;
}
- if (unsigned_enum)
- TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
+ child_die = sibling_die (child_die);
+ }
+ qsort (offsets, offsets_end - offsets, sizeof (*offsets),
+ unsigned_int_compar);
+ for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
+ if (offsetp[-1] == *offsetp)
+ complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer "
+ "to DIE 0x%x as their abstract origin"),
+ die->offset, *offsetp);
+
+ offsetp = offsets;
+ origin_child_die = origin_die->child;
+ while (origin_child_die && origin_child_die->tag)
+ {
+ /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
+ while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
+ offsetp++;
+ if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
+ {
+ /* Found that ORIGIN_CHILD_DIE is really not referenced. */
+ process_die (origin_child_die, cu);
+ }
+ origin_child_die = sibling_die (origin_child_die);
}
- die->type = type;
- new_symbol (die, type, objfile, cu_header);
-}
-/* Extract all information from a DW_TAG_array_type DIE and put it in
- the DIE's type field. For now, this only handles one dimensional
- arrays. */
+ do_cleanups (cleanups);
+}
static void
-read_array_type (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
+ struct context_stack *new;
+ CORE_ADDR lowpc;
+ CORE_ADDR highpc;
struct die_info *child_die;
- struct type *type = NULL;
- struct type *element_type, *range_type, *index_type;
- struct type **range_types = NULL;
- struct attribute *attr;
- int ndim = 0;
- struct cleanup *back_to;
-
- /* Return if we've already decoded this type. */
- if (die->type)
- {
- return;
+ struct attribute *attr, *call_line, *call_file;
+ char *name;
+ CORE_ADDR baseaddr;
+ struct block *block;
+ int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
+
+ if (inlined_func)
+ {
+ /* If we do not have call site information, we can't show the
+ caller of this inlined function. That's too confusing, so
+ only use the scope for local variables. */
+ call_line = dwarf2_attr (die, DW_AT_call_line, cu);
+ call_file = dwarf2_attr (die, DW_AT_call_file, cu);
+ if (call_line == NULL || call_file == NULL)
+ {
+ read_lexical_block_scope (die, cu);
+ return;
+ }
}
- element_type = die_type (die, objfile, cu_header);
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- /* Irix 6.2 native cc creates array types without children for
- arrays with unspecified length. */
- if (die->has_children == 0)
- {
- index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
- range_type = create_range_type (NULL, index_type, 0, -1);
- die->type = create_array_type (NULL, element_type, range_type);
- return;
- }
+ name = dwarf2_linkage_name (die, cu);
- back_to = make_cleanup (null_cleanup, NULL);
- child_die = die->next;
- while (child_die && child_die->tag)
- {
- if (child_die->tag == DW_TAG_subrange_type)
- {
- unsigned int low, high;
+ /* Ignore functions with missing or empty names and functions with
+ missing or invalid low and high pc attributes. */
+ if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
+ return;
- /* Default bounds to an array with unspecified length. */
- low = 0;
- high = -1;
- if (cu_language == language_fortran)
- {
- /* FORTRAN implies a lower bound of 1, if not given. */
- low = 1;
- }
+ lowpc += baseaddr;
+ highpc += baseaddr;
- index_type = die_type (child_die, objfile, cu_header);
- attr = dwarf_attr (child_die, DW_AT_lower_bound);
- if (attr)
- {
- if (attr->form == DW_FORM_sdata)
- {
- low = DW_SND (attr);
- }
- else if (attr->form == DW_FORM_udata
- || attr->form == DW_FORM_data1
- || attr->form == DW_FORM_data2
- || attr->form == DW_FORM_data4)
- {
- low = DW_UNSND (attr);
- }
- else
- {
- complain (&dwarf2_non_const_array_bound_ignored,
- dwarf_form_name (attr->form));
-#ifdef FORTRAN_HACK
- die->type = lookup_pointer_type (element_type);
- return;
-#else
- low = 0;
-#endif
- }
- }
- attr = dwarf_attr (child_die, DW_AT_upper_bound);
- if (attr)
- {
- if (attr->form == DW_FORM_sdata)
- {
- high = DW_SND (attr);
- }
- else if (attr->form == DW_FORM_udata
- || attr->form == DW_FORM_data1
- || attr->form == DW_FORM_data2
- || attr->form == DW_FORM_data4)
- {
- high = DW_UNSND (attr);
- }
- else if (attr->form == DW_FORM_block1)
- {
- /* GCC encodes arrays with unspecified or dynamic length
- with a DW_FORM_block1 attribute.
- FIXME: GDB does not yet know how to handle dynamic
- arrays properly, treat them as arrays with unspecified
- length for now. */
- high = -1;
- }
- else
- {
- complain (&dwarf2_non_const_array_bound_ignored,
- dwarf_form_name (attr->form));
-#ifdef FORTRAN_HACK
- die->type = lookup_pointer_type (element_type);
- return;
-#else
- high = 1;
-#endif
- }
- }
+ /* Record the function range for dwarf_decode_lines. */
+ add_to_cu_func_list (name, lowpc, highpc, cu);
- /* Create a range type and save it for array type creation. */
- if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
- {
- range_types = (struct type **)
- xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
- * sizeof (struct type *));
- if (ndim == 0)
- make_cleanup (free_current_contents, &range_types);
- }
- range_types[ndim++] = create_range_type (NULL, index_type, low, high);
+ new = push_context (0, lowpc);
+ new->name = new_symbol (die, read_type_die (die, cu), cu);
+
+ /* If there is a location expression for DW_AT_frame_base, record
+ it. */
+ attr = dwarf2_attr (die, DW_AT_frame_base, cu);
+ if (attr)
+ /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
+ expression is being recorded directly in the function's symbol
+ and not in a separate frame-base object. I guess this hack is
+ to avoid adding some sort of frame-base adjunct/annex to the
+ function's symbol :-(. The problem with doing this is that it
+ results in a function symbol with a location expression that
+ has nothing to do with the location of the function, ouch! The
+ relationship should be: a function's symbol has-a frame base; a
+ frame-base has-a location expression. */
+ dwarf2_symbol_mark_computed (attr, new->name, cu);
+
+ cu->list_in_scope = &local_symbols;
+
+ if (die->child != NULL)
+ {
+ child_die = die->child;
+ while (child_die && child_die->tag)
+ {
+ process_die (child_die, cu);
+ child_die = sibling_die (child_die);
}
- child_die = sibling_die (child_die);
}
- /* Dwarf2 dimensions are output from left to right, create the
- necessary array types in backwards order. */
- type = element_type;
- while (ndim-- > 0)
- type = create_array_type (NULL, type, range_types[ndim]);
+ inherit_abstract_dies (die, cu);
- do_cleanups (back_to);
+ new = pop_context ();
+ /* Make a block for the local symbols within. */
+ block = finish_block (new->name, &local_symbols, new->old_blocks,
+ lowpc, highpc, objfile);
+
+ /* For C++, set the block's scope. */
+ if (cu->language == language_cplus)
+ cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
+ determine_prefix (die, cu),
+ processing_has_namespace_info);
+
+ /* If we have address ranges, record them. */
+ dwarf2_record_block_ranges (die, block, baseaddr, cu);
+
+ /* In C++, we can have functions nested inside functions (e.g., when
+ a function declares a class that has methods). This means that
+ when we finish processing a function scope, we may need to go
+ back to building a containing block's symbol lists. */
+ local_symbols = new->locals;
+ param_symbols = new->params;
+ using_directives = new->using_directives;
- /* Install the type in the die. */
- die->type = type;
+ /* If we've finished processing a top-level function, subsequent
+ symbols go in the file symbol list. */
+ if (outermost_context_p ())
+ cu->list_in_scope = &file_symbols;
}
-/* First cut: install each common block member as a global variable. */
+/* Process all the DIES contained within a lexical block scope. Start
+ a new scope, process the dies, and then close the scope. */
static void
-read_common_block (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct objfile *objfile = cu->objfile;
+ struct context_stack *new;
+ CORE_ADDR lowpc, highpc;
struct die_info *child_die;
- struct attribute *attr;
- struct symbol *sym;
- CORE_ADDR base = (CORE_ADDR) 0;
+ CORE_ADDR baseaddr;
- attr = dwarf_attr (die, DW_AT_location);
- if (attr)
- {
- base = decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
- }
- if (die->has_children)
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ /* Ignore blocks with missing or invalid low and high pc attributes. */
+ /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
+ as multiple lexical blocks? Handling children in a sane way would
+ be nasty. Might be easier to properly extend generic blocks to
+ describe ranges. */
+ if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
+ return;
+ lowpc += baseaddr;
+ highpc += baseaddr;
+
+ push_context (0, lowpc);
+ if (die->child != NULL)
{
- child_die = die->next;
+ child_die = die->child;
while (child_die && child_die->tag)
{
- sym = new_symbol (child_die, NULL, objfile, cu_header);
- attr = dwarf_attr (child_die, DW_AT_data_member_location);
- if (attr)
- {
- SYMBOL_VALUE_ADDRESS (sym) =
- base + decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
- add_symbol_to_list (sym, &global_symbols);
- }
+ process_die (child_die, cu);
child_die = sibling_die (child_die);
}
}
-}
+ new = pop_context ();
-/* Extract all information from a DW_TAG_pointer_type DIE and add to
- the user defined type vector. */
+ if (local_symbols != NULL)
+ {
+ struct block *block
+ = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
+ highpc, objfile);
-static void
-read_tag_pointer_type (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
-{
- struct type *type;
- struct attribute *attr;
+ /* Note that recording ranges after traversing children, as we
+ do here, means that recording a parent's ranges entails
+ walking across all its children's ranges as they appear in
+ the address map, which is quadratic behavior.
- if (die->type)
- {
- return;
+ It would be nicer to record the parent's ranges before
+ traversing its children, simply overriding whatever you find
+ there. But since we don't even decide whether to create a
+ block until after we've traversed its children, that's hard
+ to do. */
+ dwarf2_record_block_ranges (die, block, baseaddr, cu);
}
+ local_symbols = new->locals;
+ using_directives = new->using_directives;
+}
- type = lookup_pointer_type (die_type (die, objfile, cu_header));
- attr = dwarf_attr (die, DW_AT_byte_size);
- if (attr)
- {
- TYPE_LENGTH (type) = DW_UNSND (attr);
+/* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
+ Return 1 if the attributes are present and valid, otherwise, return 0.
+ If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
+
+static int
+dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
+ CORE_ADDR *high_return, struct dwarf2_cu *cu,
+ struct partial_symtab *ranges_pst)
+{
+ struct objfile *objfile = cu->objfile;
+ struct comp_unit_head *cu_header = &cu->header;
+ bfd *obfd = objfile->obfd;
+ unsigned int addr_size = cu_header->addr_size;
+ CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
+ /* Base address selection entry. */
+ CORE_ADDR base;
+ int found_base;
+ unsigned int dummy;
+ gdb_byte *buffer;
+ CORE_ADDR marker;
+ int low_set;
+ CORE_ADDR low = 0;
+ CORE_ADDR high = 0;
+ CORE_ADDR baseaddr;
+
+ found_base = cu->base_known;
+ base = cu->base_address;
+
+ if (offset >= dwarf2_per_objfile->ranges.size)
+ {
+ complaint (&symfile_complaints,
+ _("Offset %d out of bounds for DW_AT_ranges attribute"),
+ offset);
+ return 0;
}
- else
+ buffer = dwarf2_per_objfile->ranges.buffer + offset;
+
+ /* Read in the largest possible address. */
+ marker = read_address (obfd, buffer, cu, &dummy);
+ if ((marker & mask) == mask)
{
- TYPE_LENGTH (type) = cu_header->addr_size;
+ /* If we found the largest possible address, then
+ read the base address. */
+ base = read_address (obfd, buffer + addr_size, cu, &dummy);
+ buffer += 2 * addr_size;
+ offset += 2 * addr_size;
+ found_base = 1;
}
- die->type = type;
-}
-/* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
- the user defined type vector. */
+ low_set = 0;
-static void
-read_tag_ptr_to_member_type (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
-{
- struct type *type;
- struct type *to_type;
- struct type *domain;
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- if (die->type)
+ while (1)
{
- return;
- }
+ CORE_ADDR range_beginning, range_end;
- type = alloc_type (objfile);
- to_type = die_type (die, objfile, cu_header);
- domain = die_containing_type (die, objfile, cu_header);
- smash_to_member_type (type, domain, to_type);
+ range_beginning = read_address (obfd, buffer, cu, &dummy);
+ buffer += addr_size;
+ range_end = read_address (obfd, buffer, cu, &dummy);
+ buffer += addr_size;
+ offset += 2 * addr_size;
- die->type = type;
-}
+ /* An end of list marker is a pair of zero addresses. */
+ if (range_beginning == 0 && range_end == 0)
+ /* Found the end of list entry. */
+ break;
-/* Extract all information from a DW_TAG_reference_type DIE and add to
- the user defined type vector. */
+ /* Each base address selection entry is a pair of 2 values.
+ The first is the largest possible address, the second is
+ the base address. Check for a base address here. */
+ if ((range_beginning & mask) == mask)
+ {
+ /* If we found the largest possible address, then
+ read the base address. */
+ base = read_address (obfd, buffer + addr_size, cu, &dummy);
+ found_base = 1;
+ continue;
+ }
-static void
-read_tag_reference_type (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
-{
- struct type *type;
- struct attribute *attr;
+ if (!found_base)
+ {
+ /* We have no valid base address for the ranges
+ data. */
+ complaint (&symfile_complaints,
+ _("Invalid .debug_ranges data (no base address)"));
+ return 0;
+ }
- if (die->type)
- {
- return;
+ range_beginning += base;
+ range_end += base;
+
+ if (ranges_pst != NULL && range_beginning < range_end)
+ addrmap_set_empty (objfile->psymtabs_addrmap,
+ range_beginning + baseaddr, range_end - 1 + baseaddr,
+ ranges_pst);
+
+ /* FIXME: This is recording everything as a low-high
+ segment of consecutive addresses. We should have a
+ data structure for discontiguous block ranges
+ instead. */
+ if (! low_set)
+ {
+ low = range_beginning;
+ high = range_end;
+ low_set = 1;
+ }
+ else
+ {
+ if (range_beginning < low)
+ low = range_beginning;
+ if (range_end > high)
+ high = range_end;
+ }
}
- type = lookup_reference_type (die_type (die, objfile, cu_header));
- attr = dwarf_attr (die, DW_AT_byte_size);
- if (attr)
+ if (! low_set)
+ /* If the first entry is an end-of-list marker, the range
+ describes an empty scope, i.e. no instructions. */
+ return 0;
+
+ if (low_return)
+ *low_return = low;
+ if (high_return)
+ *high_return = high;
+ return 1;
+}
+
+/* Get low and high pc attributes from a die. Return 1 if the attributes
+ are present and valid, otherwise, return 0. Return -1 if the range is
+ discontinuous, i.e. derived from DW_AT_ranges information. */
+static int
+dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
+ CORE_ADDR *highpc, struct dwarf2_cu *cu,
+ struct partial_symtab *pst)
+{
+ struct attribute *attr;
+ CORE_ADDR low = 0;
+ CORE_ADDR high = 0;
+ int ret = 0;
+
+ attr = dwarf2_attr (die, DW_AT_high_pc, cu);
+ if (attr)
{
- TYPE_LENGTH (type) = DW_UNSND (attr);
+ high = DW_ADDR (attr);
+ attr = dwarf2_attr (die, DW_AT_low_pc, cu);
+ if (attr)
+ low = DW_ADDR (attr);
+ else
+ /* Found high w/o low attribute. */
+ return 0;
+
+ /* Found consecutive range of addresses. */
+ ret = 1;
}
else
{
- TYPE_LENGTH (type) = cu_header->addr_size;
+ attr = dwarf2_attr (die, DW_AT_ranges, cu);
+ if (attr != NULL)
+ {
+ /* Value of the DW_AT_ranges attribute is the offset in the
+ .debug_ranges section. */
+ if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
+ return 0;
+ /* Found discontinuous range of addresses. */
+ ret = -1;
+ }
}
- die->type = type;
+
+ if (high < low)
+ return 0;
+
+ /* When using the GNU linker, .gnu.linkonce. sections are used to
+ eliminate duplicate copies of functions and vtables and such.
+ The linker will arbitrarily choose one and discard the others.
+ The AT_*_pc values for such functions refer to local labels in
+ these sections. If the section from that file was discarded, the
+ labels are not in the output, so the relocs get a value of 0.
+ If this is a discarded function, mark the pc bounds as invalid,
+ so that GDB will ignore it. */
+ if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
+ return 0;
+
+ *lowpc = low;
+ *highpc = high;
+ return ret;
}
+/* Assuming that DIE represents a subprogram DIE or a lexical block, get
+ its low and high PC addresses. Do nothing if these addresses could not
+ be determined. Otherwise, set LOWPC to the low address if it is smaller,
+ and HIGHPC to the high address if greater than HIGHPC. */
+
static void
-read_tag_const_type (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+dwarf2_get_subprogram_pc_bounds (struct die_info *die,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ struct dwarf2_cu *cu)
{
- struct type *base_type;
+ CORE_ADDR low, high;
+ struct die_info *child = die->child;
- if (die->type)
+ if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
{
- return;
+ *lowpc = min (*lowpc, low);
+ *highpc = max (*highpc, high);
}
- base_type = die_type (die, objfile, cu_header);
- die->type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
+ /* If the language does not allow nested subprograms (either inside
+ subprograms or lexical blocks), we're done. */
+ if (cu->language != language_ada)
+ return;
+
+ /* Check all the children of the given DIE. If it contains nested
+ subprograms, then check their pc bounds. Likewise, we need to
+ check lexical blocks as well, as they may also contain subprogram
+ definitions. */
+ while (child && child->tag)
+ {
+ if (child->tag == DW_TAG_subprogram
+ || child->tag == DW_TAG_lexical_block)
+ dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
+ child = sibling_die (child);
+ }
}
+/* Get the low and high pc's represented by the scope DIE, and store
+ them in *LOWPC and *HIGHPC. If the correct values can't be
+ determined, set *LOWPC to -1 and *HIGHPC to 0. */
+
static void
-read_tag_volatile_type (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+get_scope_pc_bounds (struct die_info *die,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ struct dwarf2_cu *cu)
{
- struct type *base_type;
+ CORE_ADDR best_low = (CORE_ADDR) -1;
+ CORE_ADDR best_high = (CORE_ADDR) 0;
+ CORE_ADDR current_low, current_high;
- if (die->type)
+ if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
{
- return;
+ best_low = current_low;
+ best_high = current_high;
}
+ else
+ {
+ struct die_info *child = die->child;
- base_type = die_type (die, objfile, cu_header);
- die->type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
-}
+ while (child && child->tag)
+ {
+ switch (child->tag) {
+ case DW_TAG_subprogram:
+ dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
+ break;
+ case DW_TAG_namespace:
+ /* FIXME: carlton/2004-01-16: Should we do this for
+ DW_TAG_class_type/DW_TAG_structure_type, too? I think
+ that current GCC's always emit the DIEs corresponding
+ to definitions of methods of classes as children of a
+ DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
+ the DIEs giving the declarations, which could be
+ anywhere). But I don't see any reason why the
+ standards says that they have to be there. */
+ get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
+
+ if (current_low != ((CORE_ADDR) -1))
+ {
+ best_low = min (best_low, current_low);
+ best_high = max (best_high, current_high);
+ }
+ break;
+ default:
+ /* Ignore. */
+ break;
+ }
-/* Extract all information from a DW_TAG_string_type DIE and add to
- the user defined type vector. It isn't really a user defined type,
- but it behaves like one, with other DIE's using an AT_user_def_type
- attribute to reference it. */
+ child = sibling_die (child);
+ }
+ }
+
+ *lowpc = best_low;
+ *highpc = best_high;
+}
+/* Record the address ranges for BLOCK, offset by BASEADDR, as given
+ in DIE. */
static void
-read_tag_string_type (struct die_info *die, struct objfile *objfile)
+dwarf2_record_block_ranges (struct die_info *die, struct block *block,
+ CORE_ADDR baseaddr, struct dwarf2_cu *cu)
{
- struct type *type, *range_type, *index_type, *char_type;
struct attribute *attr;
- unsigned int length;
- if (die->type)
+ attr = dwarf2_attr (die, DW_AT_high_pc, cu);
+ if (attr)
{
- return;
+ CORE_ADDR high = DW_ADDR (attr);
+ attr = dwarf2_attr (die, DW_AT_low_pc, cu);
+ if (attr)
+ {
+ CORE_ADDR low = DW_ADDR (attr);
+ record_block_range (block, baseaddr + low, baseaddr + high - 1);
+ }
}
- attr = dwarf_attr (die, DW_AT_string_length);
+ attr = dwarf2_attr (die, DW_AT_ranges, cu);
if (attr)
{
- length = DW_UNSND (attr);
- }
- else
- {
- /* check for the DW_AT_byte_size attribute */
- attr = dwarf_attr (die, DW_AT_byte_size);
- if (attr)
+ bfd *obfd = cu->objfile->obfd;
+
+ /* The value of the DW_AT_ranges attribute is the offset of the
+ address range list in the .debug_ranges section. */
+ unsigned long offset = DW_UNSND (attr);
+ gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
+
+ /* For some target architectures, but not others, the
+ read_address function sign-extends the addresses it returns.
+ To recognize base address selection entries, we need a
+ mask. */
+ unsigned int addr_size = cu->header.addr_size;
+ CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
+
+ /* The base address, to which the next pair is relative. Note
+ that this 'base' is a DWARF concept: most entries in a range
+ list are relative, to reduce the number of relocs against the
+ debugging information. This is separate from this function's
+ 'baseaddr' argument, which GDB uses to relocate debugging
+ information from a shared library based on the address at
+ which the library was loaded. */
+ CORE_ADDR base = cu->base_address;
+ int base_known = cu->base_known;
+
+ if (offset >= dwarf2_per_objfile->ranges.size)
{
- length = DW_UNSND (attr);
+ complaint (&symfile_complaints,
+ _("Offset %lu out of bounds for DW_AT_ranges attribute"),
+ offset);
+ return;
}
- else
+
+ for (;;)
{
- length = 1;
+ unsigned int bytes_read;
+ CORE_ADDR start, end;
+
+ start = read_address (obfd, buffer, cu, &bytes_read);
+ buffer += bytes_read;
+ end = read_address (obfd, buffer, cu, &bytes_read);
+ buffer += bytes_read;
+
+ /* Did we find the end of the range list? */
+ if (start == 0 && end == 0)
+ break;
+
+ /* Did we find a base address selection entry? */
+ else if ((start & base_select_mask) == base_select_mask)
+ {
+ base = end;
+ base_known = 1;
+ }
+
+ /* We found an ordinary address range. */
+ else
+ {
+ if (!base_known)
+ {
+ complaint (&symfile_complaints,
+ _("Invalid .debug_ranges data (no base address)"));
+ return;
+ }
+
+ record_block_range (block,
+ baseaddr + base + start,
+ baseaddr + base + end - 1);
+ }
}
}
- index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
- range_type = create_range_type (NULL, index_type, 1, length);
- if (cu_language == language_fortran)
- {
- /* Need to create a unique string type for bounds
- information */
- type = create_string_type (0, range_type);
- }
- else
- {
- char_type = dwarf2_fundamental_type (objfile, FT_CHAR);
- type = create_string_type (char_type, range_type);
- }
- die->type = type;
}
-/* Handle DIES due to C code like:
-
- struct foo
- {
- int (*funcp)(int a, long l);
- int b;
- };
-
- ('funcp' generates a DW_TAG_subroutine_type DIE)
- */
+/* Add an aggregate field to the field list. */
static void
-read_subroutine_type (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
-{
- struct type *type; /* Type that this function returns */
- struct type *ftype; /* Function that returns above type */
+dwarf2_add_field (struct field_info *fip, struct die_info *die,
+ struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
+ struct nextfield *new_field;
struct attribute *attr;
+ struct field *fp;
+ char *fieldname = "";
+
+ /* Allocate a new field list entry and link it in. */
+ new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
+ make_cleanup (xfree, new_field);
+ memset (new_field, 0, sizeof (struct nextfield));
- /* Decode the type that this subroutine returns */
- if (die->type)
+ if (die->tag == DW_TAG_inheritance)
{
- return;
+ new_field->next = fip->baseclasses;
+ fip->baseclasses = new_field;
}
- type = die_type (die, objfile, cu_header);
- ftype = lookup_function_type (type);
+ else
+ {
+ new_field->next = fip->fields;
+ fip->fields = new_field;
+ }
+ fip->nfields++;
- /* All functions in C++ have prototypes. */
- attr = dwarf_attr (die, DW_AT_prototyped);
- if ((attr && (DW_UNSND (attr) != 0))
- || cu_language == language_cplus)
- TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
+ /* Handle accessibility and virtuality of field.
+ The default accessibility for members is public, the default
+ accessibility for inheritance is private. */
+ if (die->tag != DW_TAG_inheritance)
+ new_field->accessibility = DW_ACCESS_public;
+ else
+ new_field->accessibility = DW_ACCESS_private;
+ new_field->virtuality = DW_VIRTUALITY_none;
+
+ attr = dwarf2_attr (die, DW_AT_accessibility, cu);
+ if (attr)
+ new_field->accessibility = DW_UNSND (attr);
+ if (new_field->accessibility != DW_ACCESS_public)
+ fip->non_public_fields = 1;
+ attr = dwarf2_attr (die, DW_AT_virtuality, cu);
+ if (attr)
+ new_field->virtuality = DW_UNSND (attr);
+
+ fp = &new_field->field;
- if (die->has_children)
+ if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
{
- struct die_info *child_die;
- int nparams = 0;
- int iparams = 0;
+ /* Data member other than a C++ static data member. */
+
+ /* Get type of field. */
+ fp->type = die_type (die, cu);
- /* Count the number of parameters.
- FIXME: GDB currently ignores vararg functions, but knows about
- vararg member functions. */
- child_die = die->next;
- while (child_die && child_die->tag)
+ SET_FIELD_BITPOS (*fp, 0);
+
+ /* Get bit size of field (zero if none). */
+ attr = dwarf2_attr (die, DW_AT_bit_size, cu);
+ if (attr)
{
- if (child_die->tag == DW_TAG_formal_parameter)
- nparams++;
- else if (child_die->tag == DW_TAG_unspecified_parameters)
- TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS;
- child_die = sibling_die (child_die);
+ FIELD_BITSIZE (*fp) = DW_UNSND (attr);
+ }
+ else
+ {
+ FIELD_BITSIZE (*fp) = 0;
}
- /* Allocate storage for parameters and fill them in. */
- TYPE_NFIELDS (ftype) = nparams;
- TYPE_FIELDS (ftype) = (struct field *)
- TYPE_ALLOC (ftype, nparams * sizeof (struct field));
+ /* Get bit offset of field. */
+ attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
+ if (attr)
+ {
+ int byte_offset = 0;
+
+ if (attr_form_is_section_offset (attr))
+ dwarf2_complex_location_expr_complaint ();
+ else if (attr_form_is_constant (attr))
+ byte_offset = dwarf2_get_attr_constant_value (attr, 0);
+ else if (attr_form_is_block (attr))
+ byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
+ else
+ dwarf2_complex_location_expr_complaint ();
- child_die = die->next;
- while (child_die && child_die->tag)
+ SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
+ }
+ attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
+ if (attr)
{
- if (child_die->tag == DW_TAG_formal_parameter)
+ if (gdbarch_bits_big_endian (gdbarch))
{
- /* Dwarf2 has no clean way to discern C++ static and non-static
- member functions. G++ helps GDB by marking the first
- parameter for non-static member functions (which is the
- this pointer) as artificial. We pass this information
- to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
- attr = dwarf_attr (child_die, DW_AT_artificial);
+ /* For big endian bits, the DW_AT_bit_offset gives the
+ additional bit offset from the MSB of the containing
+ anonymous object to the MSB of the field. We don't
+ have to do anything special since we don't need to
+ know the size of the anonymous object. */
+ FIELD_BITPOS (*fp) += DW_UNSND (attr);
+ }
+ else
+ {
+ /* For little endian bits, compute the bit offset to the
+ MSB of the anonymous object, subtract off the number of
+ bits from the MSB of the field to the MSB of the
+ object, and then subtract off the number of bits of
+ the field itself. The result is the bit offset of
+ the LSB of the field. */
+ int anonymous_size;
+ int bit_offset = DW_UNSND (attr);
+
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
if (attr)
- TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
+ {
+ /* The size of the anonymous object containing
+ the bit field is explicit, so use the
+ indicated size (in bytes). */
+ anonymous_size = DW_UNSND (attr);
+ }
else
- TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
- TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, objfile,
- cu_header);
- iparams++;
+ {
+ /* The size of the anonymous object containing
+ the bit field must be inferred from the type
+ attribute of the data member containing the
+ bit field. */
+ anonymous_size = TYPE_LENGTH (fp->type);
+ }
+ FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
+ - bit_offset - FIELD_BITSIZE (*fp);
}
- child_die = sibling_die (child_die);
}
- }
- die->type = ftype;
-}
+ /* Get name of field. */
+ fieldname = dwarf2_name (die, cu);
+ if (fieldname == NULL)
+ fieldname = "";
-static void
-read_typedef (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
-{
- struct attribute *attr;
- char *name = NULL;
+ /* The name is already allocated along with this objfile, so we don't
+ need to duplicate it for the type. */
+ fp->name = fieldname;
- if (!die->type)
- {
- attr = dwarf_attr (die, DW_AT_name);
- if (attr && DW_STRING (attr))
+ /* Change accessibility for artificial fields (e.g. virtual table
+ pointer or virtual base class pointer) to private. */
+ if (dwarf2_attr (die, DW_AT_artificial, cu))
{
- name = DW_STRING (attr);
+ FIELD_ARTIFICIAL (*fp) = 1;
+ new_field->accessibility = DW_ACCESS_private;
+ fip->non_public_fields = 1;
}
- die->type = init_type (TYPE_CODE_TYPEDEF, 0, TYPE_FLAG_TARGET_STUB, name, objfile);
- TYPE_TARGET_TYPE (die->type) = die_type (die, objfile, cu_header);
}
-}
+ else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
+ {
+ /* C++ static member. */
-/* Find a representation of a given base type and install
- it in the TYPE field of the die. */
+ /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
+ is a declaration, but all versions of G++ as of this writing
+ (so through at least 3.2.1) incorrectly generate
+ DW_TAG_variable tags. */
+
+ char *physname;
-static void
-read_base_type (struct die_info *die, struct objfile *objfile)
-{
- struct type *type;
- struct attribute *attr;
- int encoding = 0, size = 0;
+ /* Get name of field. */
+ fieldname = dwarf2_name (die, cu);
+ if (fieldname == NULL)
+ return;
- /* If we've already decoded this die, this is a no-op. */
- if (die->type)
- {
- return;
- }
+ /* Get physical name. */
+ physname = dwarf2_linkage_name (die, cu);
- attr = dwarf_attr (die, DW_AT_encoding);
- if (attr)
- {
- encoding = DW_UNSND (attr);
- }
- attr = dwarf_attr (die, DW_AT_byte_size);
- if (attr)
- {
- size = DW_UNSND (attr);
+ /* The name is already allocated along with this objfile, so we don't
+ need to duplicate it for the type. */
+ SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
+ FIELD_TYPE (*fp) = die_type (die, cu);
+ FIELD_NAME (*fp) = fieldname;
}
- attr = dwarf_attr (die, DW_AT_name);
- if (attr && DW_STRING (attr))
+ else if (die->tag == DW_TAG_inheritance)
{
- enum type_code code = TYPE_CODE_INT;
- int type_flags = 0;
-
- switch (encoding)
+ /* C++ base class field. */
+ attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
+ if (attr)
{
- case DW_ATE_address:
- /* Turn DW_ATE_address into a void * pointer. */
- code = TYPE_CODE_PTR;
- type_flags |= TYPE_FLAG_UNSIGNED;
- break;
- case DW_ATE_boolean:
- code = TYPE_CODE_BOOL;
- type_flags |= TYPE_FLAG_UNSIGNED;
- break;
- case DW_ATE_complex_float:
- code = TYPE_CODE_COMPLEX;
- break;
- case DW_ATE_float:
- code = TYPE_CODE_FLT;
- break;
- case DW_ATE_signed:
- case DW_ATE_signed_char:
- break;
- case DW_ATE_unsigned:
- case DW_ATE_unsigned_char:
- type_flags |= TYPE_FLAG_UNSIGNED;
- break;
- default:
- complain (&dwarf2_unsupported_at_encoding,
- dwarf_type_encoding_name (encoding));
- break;
+ int byte_offset = 0;
+
+ if (attr_form_is_section_offset (attr))
+ dwarf2_complex_location_expr_complaint ();
+ else if (attr_form_is_constant (attr))
+ byte_offset = dwarf2_get_attr_constant_value (attr, 0);
+ else if (attr_form_is_block (attr))
+ byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
+ else
+ dwarf2_complex_location_expr_complaint ();
+
+ SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
}
- type = init_type (code, size, type_flags, DW_STRING (attr), objfile);
- if (encoding == DW_ATE_address)
- TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID);
- }
- else
- {
- type = dwarf_base_type (encoding, size, objfile);
+ FIELD_BITSIZE (*fp) = 0;
+ FIELD_TYPE (*fp) = die_type (die, cu);
+ FIELD_NAME (*fp) = type_name_no_tag (fp->type);
+ fip->nbaseclasses++;
}
- die->type = type;
}
-/* Read a whole compilation unit into a linked list of dies. */
+/* Create the vector of fields, and attach it to the type. */
-static struct die_info *
-read_comp_unit (char *info_ptr, bfd *abfd,
- const struct comp_unit_head *cu_header)
+static void
+dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
+ struct dwarf2_cu *cu)
{
- struct die_info *first_die, *last_die, *die;
- char *cur_ptr;
- int nesting_level;
+ int nfields = fip->nfields;
- /* Reset die reference table; we are
- building new ones now. */
- dwarf2_empty_hash_tables ();
+ /* Record the field count, allocate space for the array of fields,
+ and create blank accessibility bitfields if necessary. */
+ TYPE_NFIELDS (type) = nfields;
+ TYPE_FIELDS (type) = (struct field *)
+ TYPE_ALLOC (type, sizeof (struct field) * nfields);
+ memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
- cur_ptr = info_ptr;
- nesting_level = 0;
- first_die = last_die = NULL;
- do
+ if (fip->non_public_fields)
{
- cur_ptr = read_full_die (&die, abfd, cur_ptr, cu_header);
- if (die->has_children)
- {
- nesting_level++;
- }
- if (die->tag == 0)
- {
- nesting_level--;
- }
+ ALLOCATE_CPLUS_STRUCT_TYPE (type);
- die->next = NULL;
+ TYPE_FIELD_PRIVATE_BITS (type) =
+ (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
+ B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
- /* Enter die in reference hash table */
- store_in_ref_table (die->offset, die);
+ TYPE_FIELD_PROTECTED_BITS (type) =
+ (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
+ B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
- if (!first_die)
- {
- first_die = last_die = die;
- }
- else
- {
- last_die->next = die;
- last_die = die;
- }
+ TYPE_FIELD_IGNORE_BITS (type) =
+ (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
+ B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
}
- while (nesting_level > 0);
- return first_die;
-}
-
-/* Free a linked list of dies. */
-
-static void
-free_die_list (struct die_info *dies)
-{
- struct die_info *die, *next;
- die = dies;
- while (die)
+ /* If the type has baseclasses, allocate and clear a bit vector for
+ TYPE_FIELD_VIRTUAL_BITS. */
+ if (fip->nbaseclasses)
{
- next = die->next;
- xfree (die->attrs);
- xfree (die);
- die = next;
- }
-}
+ int num_bytes = B_BYTES (fip->nbaseclasses);
+ unsigned char *pointer;
-static void
-do_free_die_list_cleanup (void *dies)
-{
- free_die_list (dies);
-}
+ ALLOCATE_CPLUS_STRUCT_TYPE (type);
+ pointer = TYPE_ALLOC (type, num_bytes);
+ TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
+ B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
+ TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
+ }
-static struct cleanup *
-make_cleanup_free_die_list (struct die_info *dies)
-{
- return make_cleanup (do_free_die_list_cleanup, dies);
-}
+ /* Copy the saved-up fields into the field vector. Start from the head
+ of the list, adding to the tail of the field array, so that they end
+ up in the same order in the array in which they were added to the list. */
+ while (nfields-- > 0)
+ {
+ struct nextfield *fieldp;
+ if (fip->fields)
+ {
+ fieldp = fip->fields;
+ fip->fields = fieldp->next;
+ }
+ else
+ {
+ fieldp = fip->baseclasses;
+ fip->baseclasses = fieldp->next;
+ }
-/* Read the contents of the section at OFFSET and of size SIZE from the
- object file specified by OBJFILE into the psymbol_obstack and return it. */
+ TYPE_FIELD (type, nfields) = fieldp->field;
+ switch (fieldp->accessibility)
+ {
+ case DW_ACCESS_private:
+ SET_TYPE_FIELD_PRIVATE (type, nfields);
+ break;
-char *
-dwarf2_read_section (struct objfile *objfile, file_ptr offset,
- unsigned int size)
-{
- bfd *abfd = objfile->obfd;
- char *buf;
+ case DW_ACCESS_protected:
+ SET_TYPE_FIELD_PROTECTED (type, nfields);
+ break;
- if (size == 0)
- return NULL;
+ case DW_ACCESS_public:
+ break;
- buf = (char *) obstack_alloc (&objfile->psymbol_obstack, size);
- if ((bfd_seek (abfd, offset, SEEK_SET) != 0) ||
- (bfd_bread (buf, size, abfd) != size))
- {
- buf = NULL;
- error ("Dwarf Error: Can't read DWARF data from '%s'",
- bfd_get_filename (abfd));
+ default:
+ /* Unknown accessibility. Complain and treat it as public. */
+ {
+ complaint (&symfile_complaints, _("unsupported accessibility %d"),
+ fieldp->accessibility);
+ }
+ break;
+ }
+ if (nfields < fip->nbaseclasses)
+ {
+ switch (fieldp->virtuality)
+ {
+ case DW_VIRTUALITY_virtual:
+ case DW_VIRTUALITY_pure_virtual:
+ SET_TYPE_FIELD_VIRTUAL (type, nfields);
+ break;
+ }
+ }
}
- return buf;
}
-/* In DWARF version 2, the description of the debugging information is
- stored in a separate .debug_abbrev section. Before we read any
- dies from a section we read in all abbreviations and install them
- in a hash table. */
+/* Add a member function to the proper fieldlist. */
static void
-dwarf2_read_abbrevs (bfd *abfd, unsigned int offset)
+dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
+ struct type *type, struct dwarf2_cu *cu)
{
- char *abbrev_ptr;
- struct abbrev_info *cur_abbrev;
- unsigned int abbrev_number, bytes_read, abbrev_name;
- unsigned int abbrev_form, hash_number;
+ struct objfile *objfile = cu->objfile;
+ struct attribute *attr;
+ struct fnfieldlist *flp;
+ int i;
+ struct fn_field *fnp;
+ char *fieldname;
+ char *physname;
+ struct nextfnfield *new_fnfield;
+ struct type *this_type;
- /* empty the table */
- dwarf2_empty_abbrev_table (NULL);
+ /* Get name of member function. */
+ fieldname = dwarf2_name (die, cu);
+ if (fieldname == NULL)
+ return;
- abbrev_ptr = dwarf_abbrev_buffer + offset;
- abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
+ /* Get the mangled name. */
+ physname = dwarf2_linkage_name (die, cu);
- /* loop until we reach an abbrev number of 0 */
- while (abbrev_number)
+ /* Look up member function name in fieldlist. */
+ for (i = 0; i < fip->nfnfields; i++)
{
- cur_abbrev = dwarf_alloc_abbrev ();
-
- /* read in abbrev header */
- cur_abbrev->number = abbrev_number;
- cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
- cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
- abbrev_ptr += 1;
+ if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
+ break;
+ }
- /* now read in declarations */
- abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
- abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
- while (abbrev_name)
+ /* Create new list element if necessary. */
+ if (i < fip->nfnfields)
+ flp = &fip->fnfieldlists[i];
+ else
+ {
+ if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
{
- if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0)
- {
- cur_abbrev->attrs = (struct attr_abbrev *)
- xrealloc (cur_abbrev->attrs,
- (cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK)
- * sizeof (struct attr_abbrev));
- }
- cur_abbrev->attrs[cur_abbrev->num_attrs].name = abbrev_name;
- cur_abbrev->attrs[cur_abbrev->num_attrs++].form = abbrev_form;
- abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
- abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
+ fip->fnfieldlists = (struct fnfieldlist *)
+ xrealloc (fip->fnfieldlists,
+ (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
+ * sizeof (struct fnfieldlist));
+ if (fip->nfnfields == 0)
+ make_cleanup (free_current_contents, &fip->fnfieldlists);
}
+ flp = &fip->fnfieldlists[fip->nfnfields];
+ flp->name = fieldname;
+ flp->length = 0;
+ flp->head = NULL;
+ fip->nfnfields++;
+ }
- hash_number = abbrev_number % ABBREV_HASH_SIZE;
- cur_abbrev->next = dwarf2_abbrevs[hash_number];
- dwarf2_abbrevs[hash_number] = cur_abbrev;
+ /* Create a new member function field and chain it to the field list
+ entry. */
+ new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
+ make_cleanup (xfree, new_fnfield);
+ memset (new_fnfield, 0, sizeof (struct nextfnfield));
+ new_fnfield->next = flp->head;
+ flp->head = new_fnfield;
+ flp->length++;
- /* Get next abbreviation.
- Under Irix6 the abbreviations for a compilation unit are not
- always properly terminated with an abbrev number of 0.
- Exit loop if we encounter an abbreviation which we have
- already read (which means we are about to read the abbreviations
- for the next compile unit) or if the end of the abbreviation
- table is reached. */
- if ((unsigned int) (abbrev_ptr - dwarf_abbrev_buffer)
- >= dwarf_abbrev_size)
- break;
- abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
- abbrev_ptr += bytes_read;
- if (dwarf2_lookup_abbrev (abbrev_number) != NULL)
- break;
+ /* Fill in the member function field info. */
+ fnp = &new_fnfield->fnfield;
+ /* The name is already allocated along with this objfile, so we don't
+ need to duplicate it for the type. */
+ fnp->physname = physname ? physname : "";
+ fnp->type = alloc_type (objfile);
+ this_type = read_type_die (die, cu);
+ if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
+ {
+ int nparams = TYPE_NFIELDS (this_type);
+
+ /* TYPE is the domain of this method, and THIS_TYPE is the type
+ of the method itself (TYPE_CODE_METHOD). */
+ smash_to_method_type (fnp->type, type,
+ TYPE_TARGET_TYPE (this_type),
+ TYPE_FIELDS (this_type),
+ TYPE_NFIELDS (this_type),
+ TYPE_VARARGS (this_type));
+
+ /* Handle static member functions.
+ Dwarf2 has no clean way to discern C++ static and non-static
+ member functions. G++ helps GDB by marking the first
+ parameter for non-static member functions (which is the
+ this pointer) as artificial. We obtain this information
+ from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
+ if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
+ fnp->voffset = VOFFSET_STATIC;
}
-}
+ else
+ complaint (&symfile_complaints, _("member function type missing for '%s'"),
+ physname);
-/* Empty the abbrev table for a new compilation unit. */
+ /* Get fcontext from DW_AT_containing_type if present. */
+ if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
+ fnp->fcontext = die_containing_type (die, cu);
-/* ARGSUSED */
-static void
-dwarf2_empty_abbrev_table (PTR ignore)
-{
- int i;
- struct abbrev_info *abbrev, *next;
+ /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
+ and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
- for (i = 0; i < ABBREV_HASH_SIZE; ++i)
+ /* Get accessibility. */
+ attr = dwarf2_attr (die, DW_AT_accessibility, cu);
+ if (attr)
{
- next = NULL;
- abbrev = dwarf2_abbrevs[i];
- while (abbrev)
+ switch (DW_UNSND (attr))
{
- next = abbrev->next;
- xfree (abbrev->attrs);
- xfree (abbrev);
- abbrev = next;
+ case DW_ACCESS_private:
+ fnp->is_private = 1;
+ break;
+ case DW_ACCESS_protected:
+ fnp->is_protected = 1;
+ break;
}
- dwarf2_abbrevs[i] = NULL;
}
-}
-
-/* Lookup an abbrev_info structure in the abbrev hash table. */
-static struct abbrev_info *
-dwarf2_lookup_abbrev (unsigned int number)
-{
- unsigned int hash_number;
- struct abbrev_info *abbrev;
+ /* Check for artificial methods. */
+ attr = dwarf2_attr (die, DW_AT_artificial, cu);
+ if (attr && DW_UNSND (attr) != 0)
+ fnp->is_artificial = 1;
- hash_number = number % ABBREV_HASH_SIZE;
- abbrev = dwarf2_abbrevs[hash_number];
+ /* Get index in virtual function table if it is a virtual member
+ function. For GCC, this is an offset in the appropriate
+ virtual table, as specified by DW_AT_containing_type. For
+ everyone else, it is an expression to be evaluated relative
+ to the object address. */
- while (abbrev)
+ attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
+ if (attr && fnp->fcontext)
{
- if (abbrev->number == number)
- return abbrev;
+ /* Support the .debug_loc offsets */
+ if (attr_form_is_block (attr))
+ {
+ fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
+ }
+ else if (attr_form_is_section_offset (attr))
+ {
+ dwarf2_complex_location_expr_complaint ();
+ }
else
- abbrev = abbrev->next;
+ {
+ dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
+ fieldname);
+ }
+ }
+ else if (attr)
+ {
+ /* We only support trivial expressions here. This hack will work
+ for v3 classes, which always start with the vtable pointer. */
+ if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0
+ && DW_BLOCK (attr)->data[0] == DW_OP_deref)
+ {
+ struct dwarf_block blk;
+ blk.size = DW_BLOCK (attr)->size - 1;
+ blk.data = DW_BLOCK (attr)->data + 1;
+ fnp->voffset = decode_locdesc (&blk, cu);
+ if ((fnp->voffset % cu->header.addr_size) != 0)
+ dwarf2_complex_location_expr_complaint ();
+ else
+ fnp->voffset /= cu->header.addr_size;
+ fnp->voffset += 2;
+ fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
+ }
+ else
+ dwarf2_complex_location_expr_complaint ();
+ }
+ else
+ {
+ attr = dwarf2_attr (die, DW_AT_virtuality, cu);
+ if (attr && DW_UNSND (attr))
+ {
+ /* GCC does this, as of 2008-08-25; PR debug/37237. */
+ complaint (&symfile_complaints,
+ _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
+ fieldname, die->offset);
+ TYPE_CPLUS_DYNAMIC (type) = 1;
+ }
}
- return NULL;
}
-/* Read a minimal amount of information into the minimal die structure. */
+/* Create the vector of member function fields, and attach it to the type. */
-static char *
-read_partial_die (struct partial_die_info *part_die, bfd *abfd,
- char *info_ptr, const struct comp_unit_head *cu_header)
+static void
+dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
+ struct dwarf2_cu *cu)
{
- unsigned int abbrev_number, bytes_read, i;
- struct abbrev_info *abbrev;
- struct attribute attr;
- struct attribute spec_attr;
- int found_spec_attr = 0;
- int has_low_pc_attr = 0;
- int has_high_pc_attr = 0;
+ struct fnfieldlist *flp;
+ int total_length = 0;
+ int i;
- *part_die = zeroed_partial_die;
- abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- if (!abbrev_number)
- return info_ptr;
+ ALLOCATE_CPLUS_STRUCT_TYPE (type);
+ TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
+ TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
- abbrev = dwarf2_lookup_abbrev (abbrev_number);
- if (!abbrev)
+ for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
{
- error ("Dwarf Error: Could not find abbrev number %d.", abbrev_number);
+ struct nextfnfield *nfp = flp->head;
+ struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
+ int k;
+
+ TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
+ TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
+ fn_flp->fn_fields = (struct fn_field *)
+ TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
+ for (k = flp->length; (k--, nfp); nfp = nfp->next)
+ fn_flp->fn_fields[k] = nfp->fnfield;
+
+ total_length += flp->length;
}
- part_die->offset = info_ptr - dwarf_info_buffer;
- part_die->tag = abbrev->tag;
- part_die->has_children = abbrev->has_children;
- part_die->abbrev = abbrev_number;
- for (i = 0; i < abbrev->num_attrs; ++i)
- {
- info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd,
- info_ptr, cu_header);
+ TYPE_NFN_FIELDS (type) = fip->nfnfields;
+ TYPE_NFN_FIELDS_TOTAL (type) = total_length;
+}
- /* Store the data if it is of an attribute we want to keep in a
- partial symbol table. */
- switch (attr.name)
- {
- case DW_AT_name:
+/* Returns non-zero if NAME is the name of a vtable member in CU's
+ language, zero otherwise. */
+static int
+is_vtable_name (const char *name, struct dwarf2_cu *cu)
+{
+ static const char vptr[] = "_vptr";
+ static const char vtable[] = "vtable";
- /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
- if (part_die->name == NULL)
- part_die->name = DW_STRING (&attr);
- break;
- case DW_AT_MIPS_linkage_name:
- part_die->name = DW_STRING (&attr);
- break;
- case DW_AT_low_pc:
- has_low_pc_attr = 1;
- part_die->lowpc = DW_ADDR (&attr);
- break;
- case DW_AT_high_pc:
- has_high_pc_attr = 1;
- part_die->highpc = DW_ADDR (&attr);
- break;
- case DW_AT_location:
- part_die->locdesc = DW_BLOCK (&attr);
- break;
- case DW_AT_language:
- part_die->language = DW_UNSND (&attr);
- break;
- case DW_AT_external:
- part_die->is_external = DW_UNSND (&attr);
- break;
- case DW_AT_declaration:
- part_die->is_declaration = DW_UNSND (&attr);
- break;
- case DW_AT_type:
- part_die->has_type = 1;
- break;
- case DW_AT_abstract_origin:
- case DW_AT_specification:
- found_spec_attr = 1;
- spec_attr = attr;
- break;
- case DW_AT_sibling:
- /* Ignore absolute siblings, they might point outside of
- the current compile unit. */
- if (attr.form == DW_FORM_ref_addr)
- complain (&dwarf2_absolute_sibling_complaint);
- else
- part_die->sibling =
- dwarf_info_buffer + dwarf2_get_ref_die_offset (&attr);
- break;
- default:
- break;
- }
- }
+ /* Look for the C++ and Java forms of the vtable. */
+ if ((cu->language == language_java
+ && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
+ || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
+ && is_cplus_marker (name[sizeof (vptr) - 1])))
+ return 1;
- /* If we found a reference attribute and the die has no name, try
- to find a name in the referred to die. */
+ return 0;
+}
- if (found_spec_attr && part_die->name == NULL)
- {
- struct partial_die_info spec_die;
- char *spec_ptr;
- int dummy;
+/* GCC outputs unnamed structures that are really pointers to member
+ functions, with the ABI-specified layout. If DIE (from CU) describes
+ such a structure, set its type, and return nonzero. Otherwise return
+ zero.
- spec_ptr = dwarf_info_buffer + dwarf2_get_ref_die_offset (&spec_attr);
- read_partial_die (&spec_die, abfd, spec_ptr, cu_header);
- if (spec_die.name)
- {
- part_die->name = spec_die.name;
+ GCC shouldn't do this; it should just output pointer to member DIEs.
+ This is GCC PR debug/28767. */
- /* Copy DW_AT_external attribute if it is set. */
- if (spec_die.is_external)
- part_die->is_external = spec_die.is_external;
- }
- }
+static struct type *
+quirk_gcc_member_function_pointer (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct type *type;
+ struct die_info *pfn_die, *delta_die;
+ struct attribute *pfn_name, *delta_name;
+ struct type *pfn_type, *domain_type;
+
+ /* Check for a structure with no name and two children. */
+ if (die->tag != DW_TAG_structure_type
+ || dwarf2_attr (die, DW_AT_name, cu) != NULL
+ || die->child == NULL
+ || die->child->sibling == NULL
+ || (die->child->sibling->sibling != NULL
+ && die->child->sibling->sibling->tag != DW_TAG_padding))
+ return NULL;
- /* When using the GNU linker, .gnu.linkonce. sections are used to
- eliminate duplicate copies of functions and vtables and such.
- The linker will arbitrarily choose one and discard the others.
- The AT_*_pc values for such functions refer to local labels in
- these sections. If the section from that file was discarded, the
- labels are not in the output, so the relocs get a value of 0.
- If this is a discarded function, mark the pc bounds as invalid,
- so that GDB will ignore it. */
- if (has_low_pc_attr && has_high_pc_attr
- && part_die->lowpc < part_die->highpc
- && (part_die->lowpc != 0
- || (bfd_get_file_flags (abfd) & HAS_RELOC)))
- part_die->has_pc_info = 1;
- return info_ptr;
+ /* Check for __pfn and __delta members. */
+ pfn_die = die->child;
+ pfn_name = dwarf2_attr (pfn_die, DW_AT_name, cu);
+ if (pfn_die->tag != DW_TAG_member
+ || pfn_name == NULL
+ || DW_STRING (pfn_name) == NULL
+ || strcmp ("__pfn", DW_STRING (pfn_name)) != 0)
+ return NULL;
+
+ delta_die = pfn_die->sibling;
+ delta_name = dwarf2_attr (delta_die, DW_AT_name, cu);
+ if (delta_die->tag != DW_TAG_member
+ || delta_name == NULL
+ || DW_STRING (delta_name) == NULL
+ || strcmp ("__delta", DW_STRING (delta_name)) != 0)
+ return NULL;
+
+ /* Find the type of the method. */
+ pfn_type = die_type (pfn_die, cu);
+ if (pfn_type == NULL
+ || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
+ || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
+ return NULL;
+
+ /* Look for the "this" argument. */
+ pfn_type = TYPE_TARGET_TYPE (pfn_type);
+ if (TYPE_NFIELDS (pfn_type) == 0
+ || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
+ return NULL;
+
+ domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
+ type = alloc_type (objfile);
+ smash_to_method_type (type, domain_type, TYPE_TARGET_TYPE (pfn_type),
+ TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
+ TYPE_VARARGS (pfn_type));
+ type = lookup_methodptr_type (type);
+ return set_die_type (die, type, cu);
}
-/* Read the die from the .debug_info section buffer. And set diep to
- point to a newly allocated die with its information. */
+/* Called when we find the DIE that starts a structure or union scope
+ (definition) to process all dies that define the members of the
+ structure or union.
+
+ NOTE: we need to call struct_type regardless of whether or not the
+ DIE has an at_name attribute, since it might be an anonymous
+ structure or union. This gets the type entered into our set of
+ user defined types.
-static char *
-read_full_die (struct die_info **diep, bfd *abfd, char *info_ptr,
- const struct comp_unit_head *cu_header)
+ However, if the structure is incomplete (an opaque struct/union)
+ then suppress creating a symbol table entry for it since gdb only
+ wants to find the one with the complete definition. Note that if
+ it is complete, we just call new_symbol, which does it's own
+ checking about whether the struct/union is anonymous or not (and
+ suppresses creating a symbol table entry itself). */
+
+static struct type *
+read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
{
- unsigned int abbrev_number, bytes_read, i, offset;
- struct abbrev_info *abbrev;
- struct die_info *die;
+ struct objfile *objfile = cu->objfile;
+ struct type *type;
+ struct attribute *attr;
+ char *name;
+ struct cleanup *back_to = make_cleanup (null_cleanup, 0);
- offset = info_ptr - dwarf_info_buffer;
- abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- if (!abbrev_number)
+ type = quirk_gcc_member_function_pointer (die, cu);
+ if (type)
+ return type;
+
+ /* If the definition of this type lives in .debug_types, read that type.
+ Don't follow DW_AT_specification though, that will take us back up
+ the chain and we want to go down. */
+ attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
+ if (attr)
{
- die = dwarf_alloc_die ();
- die->tag = 0;
- die->abbrev = abbrev_number;
- die->type = NULL;
- *diep = die;
- return info_ptr;
+ struct dwarf2_cu *type_cu = cu;
+ struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
+ /* We could just recurse on read_structure_type, but we need to call
+ get_die_type to ensure only one type for this DIE is created.
+ This is important, for example, because for c++ classes we need
+ TYPE_NAME set which is only done by new_symbol. Blech. */
+ type = read_type_die (type_die, type_cu);
+ return set_die_type (die, type, cu);
}
- abbrev = dwarf2_lookup_abbrev (abbrev_number);
- if (!abbrev)
+ type = alloc_type (objfile);
+ INIT_CPLUS_SPECIFIC (type);
+
+ name = dwarf2_name (die, cu);
+ if (name != NULL)
{
- error ("Dwarf Error: could not find abbrev number %d.", abbrev_number);
+ if (cu->language == language_cplus
+ || cu->language == language_java)
+ {
+ const char *new_prefix = determine_class_name (die, cu);
+ TYPE_TAG_NAME (type) = (char *) new_prefix;
+ }
+ else
+ {
+ /* The name is already allocated along with this objfile, so
+ we don't need to duplicate it for the type. */
+ TYPE_TAG_NAME (type) = name;
+ }
}
- die = dwarf_alloc_die ();
- die->offset = offset;
- die->tag = abbrev->tag;
- die->has_children = abbrev->has_children;
- die->abbrev = abbrev_number;
- die->type = NULL;
- die->num_attrs = abbrev->num_attrs;
- die->attrs = (struct attribute *)
- xmalloc (die->num_attrs * sizeof (struct attribute));
+ if (die->tag == DW_TAG_structure_type)
+ {
+ TYPE_CODE (type) = TYPE_CODE_STRUCT;
+ }
+ else if (die->tag == DW_TAG_union_type)
+ {
+ TYPE_CODE (type) = TYPE_CODE_UNION;
+ }
+ else
+ {
+ /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
+ in gdbtypes.h. */
+ TYPE_CODE (type) = TYPE_CODE_CLASS;
+ }
- for (i = 0; i < abbrev->num_attrs; ++i)
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ {
+ TYPE_LENGTH (type) = DW_UNSND (attr);
+ }
+ else
{
- info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
- abfd, info_ptr, cu_header);
+ TYPE_LENGTH (type) = 0;
}
- *diep = die;
- return info_ptr;
-}
+ TYPE_STUB_SUPPORTED (type) = 1;
+ if (die_is_declaration (die, cu))
+ TYPE_STUB (type) = 1;
-/* Read an attribute value described by an attribute form. */
+ /* We need to add the type field to the die immediately so we don't
+ infinitely recurse when dealing with pointers to the structure
+ type within the structure itself. */
+ set_die_type (die, type, cu);
-static char *
-read_attribute_value (struct attribute *attr, unsigned form,
- bfd *abfd, char *info_ptr,
- const struct comp_unit_head *cu_header)
+ if (die->child != NULL && ! die_is_declaration (die, cu))
+ {
+ struct field_info fi;
+ struct die_info *child_die;
+
+ memset (&fi, 0, sizeof (struct field_info));
+
+ child_die = die->child;
+
+ while (child_die && child_die->tag)
+ {
+ if (child_die->tag == DW_TAG_member
+ || child_die->tag == DW_TAG_variable)
+ {
+ /* NOTE: carlton/2002-11-05: A C++ static data member
+ should be a DW_TAG_member that is a declaration, but
+ all versions of G++ as of this writing (so through at
+ least 3.2.1) incorrectly generate DW_TAG_variable
+ tags for them instead. */
+ dwarf2_add_field (&fi, child_die, cu);
+ }
+ else if (child_die->tag == DW_TAG_subprogram)
+ {
+ /* C++ member function. */
+ dwarf2_add_member_fn (&fi, child_die, type, cu);
+ }
+ else if (child_die->tag == DW_TAG_inheritance)
+ {
+ /* C++ base class field. */
+ dwarf2_add_field (&fi, child_die, cu);
+ }
+ child_die = sibling_die (child_die);
+ }
+
+ /* Attach fields and member functions to the type. */
+ if (fi.nfields)
+ dwarf2_attach_fields_to_type (&fi, type, cu);
+ if (fi.nfnfields)
+ {
+ dwarf2_attach_fn_fields_to_type (&fi, type, cu);
+
+ /* Get the type which refers to the base class (possibly this
+ class itself) which contains the vtable pointer for the current
+ class from the DW_AT_containing_type attribute. This use of
+ DW_AT_containing_type is a GNU extension. */
+
+ if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
+ {
+ struct type *t = die_containing_type (die, cu);
+
+ TYPE_VPTR_BASETYPE (type) = t;
+ if (type == t)
+ {
+ int i;
+
+ /* Our own class provides vtbl ptr. */
+ for (i = TYPE_NFIELDS (t) - 1;
+ i >= TYPE_N_BASECLASSES (t);
+ --i)
+ {
+ char *fieldname = TYPE_FIELD_NAME (t, i);
+
+ if (is_vtable_name (fieldname, cu))
+ {
+ TYPE_VPTR_FIELDNO (type) = i;
+ break;
+ }
+ }
+
+ /* Complain if virtual function table field not found. */
+ if (i < TYPE_N_BASECLASSES (t))
+ complaint (&symfile_complaints,
+ _("virtual function table pointer not found when defining class '%s'"),
+ TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
+ "");
+ }
+ else
+ {
+ TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
+ }
+ }
+ else if (cu->producer
+ && strncmp (cu->producer,
+ "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
+ {
+ /* The IBM XLC compiler does not provide direct indication
+ of the containing type, but the vtable pointer is
+ always named __vfp. */
+
+ int i;
+
+ for (i = TYPE_NFIELDS (type) - 1;
+ i >= TYPE_N_BASECLASSES (type);
+ --i)
+ {
+ if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
+ {
+ TYPE_VPTR_FIELDNO (type) = i;
+ TYPE_VPTR_BASETYPE (type) = type;
+ break;
+ }
+ }
+ }
+ }
+ }
+
+ do_cleanups (back_to);
+ return type;
+}
+
+static void
+process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
{
- unsigned int bytes_read;
- struct dwarf_block *blk;
+ struct objfile *objfile = cu->objfile;
+ struct die_info *child_die = die->child;
+ struct type *this_type;
+
+ this_type = get_die_type (die, cu);
+ if (this_type == NULL)
+ this_type = read_structure_type (die, cu);
+
+ /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
+ snapshots) has been known to create a die giving a declaration
+ for a class that has, as a child, a die giving a definition for a
+ nested class. So we have to process our children even if the
+ current die is a declaration. Normally, of course, a declaration
+ won't have any children at all. */
+
+ while (child_die != NULL && child_die->tag)
+ {
+ if (child_die->tag == DW_TAG_member
+ || child_die->tag == DW_TAG_variable
+ || child_die->tag == DW_TAG_inheritance)
+ {
+ /* Do nothing. */
+ }
+ else
+ process_die (child_die, cu);
- attr->form = form;
- switch (form)
- {
- case DW_FORM_addr:
- case DW_FORM_ref_addr:
- DW_ADDR (attr) = read_address (abfd, info_ptr, cu_header, &bytes_read);
- info_ptr += bytes_read;
- break;
- case DW_FORM_block2:
- blk = dwarf_alloc_block ();
- blk->size = read_2_bytes (abfd, info_ptr);
- info_ptr += 2;
- blk->data = read_n_bytes (abfd, info_ptr, blk->size);
- info_ptr += blk->size;
- DW_BLOCK (attr) = blk;
- break;
- case DW_FORM_block4:
- blk = dwarf_alloc_block ();
- blk->size = read_4_bytes (abfd, info_ptr);
- info_ptr += 4;
- blk->data = read_n_bytes (abfd, info_ptr, blk->size);
- info_ptr += blk->size;
- DW_BLOCK (attr) = blk;
- break;
- case DW_FORM_data2:
- DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
- info_ptr += 2;
- break;
- case DW_FORM_data4:
- DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
- info_ptr += 4;
- break;
- case DW_FORM_data8:
- DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
- info_ptr += 8;
- break;
- case DW_FORM_string:
- DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- break;
- case DW_FORM_strp:
- DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
- &bytes_read);
- info_ptr += bytes_read;
- break;
- case DW_FORM_block:
- blk = dwarf_alloc_block ();
- blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- blk->data = read_n_bytes (abfd, info_ptr, blk->size);
- info_ptr += blk->size;
- DW_BLOCK (attr) = blk;
- break;
- case DW_FORM_block1:
- blk = dwarf_alloc_block ();
- blk->size = read_1_byte (abfd, info_ptr);
- info_ptr += 1;
- blk->data = read_n_bytes (abfd, info_ptr, blk->size);
- info_ptr += blk->size;
- DW_BLOCK (attr) = blk;
- break;
- case DW_FORM_data1:
- DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
- info_ptr += 1;
- break;
- case DW_FORM_flag:
- DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
- info_ptr += 1;
- break;
- case DW_FORM_sdata:
- DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- break;
- case DW_FORM_udata:
- DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- break;
- case DW_FORM_ref1:
- DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
- info_ptr += 1;
- break;
- case DW_FORM_ref2:
- DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
- info_ptr += 2;
- break;
- case DW_FORM_ref4:
- DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
- info_ptr += 4;
- break;
- case DW_FORM_ref8:
- DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
- info_ptr += 8;
- break;
- case DW_FORM_ref_udata:
- DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- break;
- case DW_FORM_indirect:
- form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
- info_ptr += bytes_read;
- info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu_header);
- break;
- default:
- error ("Dwarf Error: Cannot handle %s in DWARF reader.",
- dwarf_form_name (form));
+ child_die = sibling_die (child_die);
}
- return info_ptr;
-}
-
-/* Read an attribute described by an abbreviated attribute. */
-static char *
-read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
- bfd *abfd, char *info_ptr,
- const struct comp_unit_head *cu_header)
-{
- attr->name = abbrev->name;
- return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu_header);
+ /* Do not consider external references. According to the DWARF standard,
+ these DIEs are identified by the fact that they have no byte_size
+ attribute, and a declaration attribute. */
+ if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
+ || !die_is_declaration (die, cu))
+ new_symbol (die, this_type, cu);
}
-/* read dwarf information from a buffer */
+/* Given a DW_AT_enumeration_type die, set its type. We do not
+ complete the type's fields yet, or create any symbols. */
-static unsigned int
-read_1_byte (bfd *abfd, char *buf)
+static struct type *
+read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
{
- return bfd_get_8 (abfd, (bfd_byte *) buf);
-}
+ struct objfile *objfile = cu->objfile;
+ struct type *type;
+ struct attribute *attr;
+ const char *name;
-static int
-read_1_signed_byte (bfd *abfd, char *buf)
-{
- return bfd_get_signed_8 (abfd, (bfd_byte *) buf);
-}
+ /* If the definition of this type lives in .debug_types, read that type.
+ Don't follow DW_AT_specification though, that will take us back up
+ the chain and we want to go down. */
+ attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
+ if (attr)
+ {
+ struct dwarf2_cu *type_cu = cu;
+ struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
+ type = read_type_die (type_die, type_cu);
+ return set_die_type (die, type, cu);
+ }
-static unsigned int
-read_2_bytes (bfd *abfd, char *buf)
-{
- return bfd_get_16 (abfd, (bfd_byte *) buf);
-}
+ type = alloc_type (objfile);
-static int
-read_2_signed_bytes (bfd *abfd, char *buf)
-{
- return bfd_get_signed_16 (abfd, (bfd_byte *) buf);
-}
+ TYPE_CODE (type) = TYPE_CODE_ENUM;
+ name = dwarf2_full_name (die, cu);
+ if (name != NULL)
+ TYPE_TAG_NAME (type) = (char *) name;
-static unsigned int
-read_4_bytes (bfd *abfd, char *buf)
-{
- return bfd_get_32 (abfd, (bfd_byte *) buf);
-}
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ {
+ TYPE_LENGTH (type) = DW_UNSND (attr);
+ }
+ else
+ {
+ TYPE_LENGTH (type) = 0;
+ }
-static int
-read_4_signed_bytes (bfd *abfd, char *buf)
-{
- return bfd_get_signed_32 (abfd, (bfd_byte *) buf);
-}
+ /* The enumeration DIE can be incomplete. In Ada, any type can be
+ declared as private in the package spec, and then defined only
+ inside the package body. Such types are known as Taft Amendment
+ Types. When another package uses such a type, an incomplete DIE
+ may be generated by the compiler. */
+ if (die_is_declaration (die, cu))
+ TYPE_STUB (type) = 1;
-static unsigned long
-read_8_bytes (bfd *abfd, char *buf)
-{
- return bfd_get_64 (abfd, (bfd_byte *) buf);
+ return set_die_type (die, type, cu);
}
-static CORE_ADDR
-read_address (bfd *abfd, char *buf, const struct comp_unit_head *cu_header,
- int *bytes_read)
+/* Determine the name of the type represented by DIE, which should be
+ a named C++ or Java compound type. Return the name in question,
+ allocated on the objfile obstack. */
+
+static const char *
+determine_class_name (struct die_info *die, struct dwarf2_cu *cu)
{
- CORE_ADDR retval = 0;
+ const char *new_prefix = NULL;
- if (cu_header->signed_addr_p)
+ /* If we don't have namespace debug info, guess the name by trying
+ to demangle the names of members, just like we did in
+ guess_structure_name. */
+ if (!processing_has_namespace_info)
{
- switch (cu_header->addr_size)
- {
- case 2:
- retval = bfd_get_signed_16 (abfd, (bfd_byte *) buf);
- break;
- case 4:
- retval = bfd_get_signed_32 (abfd, (bfd_byte *) buf);
- break;
- case 8:
- retval = bfd_get_signed_64 (abfd, (bfd_byte *) buf);
- break;
- default:
- internal_error (__FILE__, __LINE__,
- "read_address: bad switch, signed");
- }
- }
- else
- {
- switch (cu_header->addr_size)
+ struct die_info *child;
+
+ for (child = die->child;
+ child != NULL && child->tag != 0;
+ child = sibling_die (child))
{
- case 2:
- retval = bfd_get_16 (abfd, (bfd_byte *) buf);
- break;
- case 4:
- retval = bfd_get_32 (abfd, (bfd_byte *) buf);
- break;
- case 8:
- retval = bfd_get_64 (abfd, (bfd_byte *) buf);
- break;
- default:
- internal_error (__FILE__, __LINE__,
- "read_address: bad switch, unsigned");
+ if (child->tag == DW_TAG_subprogram)
+ {
+ char *phys_prefix
+ = language_class_name_from_physname (cu->language_defn,
+ dwarf2_linkage_name
+ (child, cu));
+
+ if (phys_prefix != NULL)
+ {
+ new_prefix
+ = obsavestring (phys_prefix, strlen (phys_prefix),
+ &cu->objfile->objfile_obstack);
+ xfree (phys_prefix);
+ break;
+ }
+ }
}
}
- *bytes_read = cu_header->addr_size;
- return retval;
-}
-
-/* Reads the initial length from a section. The (draft) DWARF 2.1
- specification allows the initial length to take up either 4 bytes
- or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
- bytes describe the length and all offsets will be 8 bytes in length
- instead of 4.
+ if (new_prefix == NULL)
+ new_prefix = dwarf2_full_name (die, cu);
- The value returned via bytes_read should be used to increment
- the relevant pointer after calling read_initial_length().
-
- As a side effect, this function sets the fields initial_length_size
- and offset_size in cu_header to the values appropriate for the
- length field. (The format of the initial length field determines
- the width of file offsets to be fetched later with fetch_offset().)
-
- [ Note: read_initial_length() and read_offset() are based on the
- document entitled "DWARF Debugging Information Format", revision
- 2.1, draft 4, dated July 20, 2000. This document was obtained
- from:
+ return new_prefix;
+}
- http://reality.sgi.com/dehnert_engr/dwarf/dwarf2p1-draft4-000720.pdf
-
- This document is only a draft and is subject to change. (So beware.)
+/* Given a pointer to a die which begins an enumeration, process all
+ the dies that define the members of the enumeration, and create the
+ symbol for the enumeration type.
- - Kevin, Aug 4, 2000
- ] */
+ NOTE: We reverse the order of the element list. */
-static LONGEST
-read_initial_length (bfd *abfd, char *buf, struct comp_unit_head *cu_header,
- int *bytes_read)
+static void
+process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
{
- LONGEST retval = 0;
-
- retval = bfd_get_32 (abfd, (bfd_byte *) buf);
+ struct objfile *objfile = cu->objfile;
+ struct die_info *child_die;
+ struct field *fields;
+ struct symbol *sym;
+ int num_fields;
+ int unsigned_enum = 1;
+ char *name;
+ struct type *this_type;
- if (retval == 0xffffffff)
+ num_fields = 0;
+ fields = NULL;
+ this_type = get_die_type (die, cu);
+ if (this_type == NULL)
+ this_type = read_enumeration_type (die, cu);
+ if (die->child != NULL)
{
- retval = bfd_get_64 (abfd, (bfd_byte *) buf + 4);
- *bytes_read = 12;
- if (cu_header != NULL)
+ child_die = die->child;
+ while (child_die && child_die->tag)
{
- cu_header->initial_length_size = 12;
- cu_header->offset_size = 8;
+ if (child_die->tag != DW_TAG_enumerator)
+ {
+ process_die (child_die, cu);
+ }
+ else
+ {
+ name = dwarf2_name (child_die, cu);
+ if (name)
+ {
+ sym = new_symbol (child_die, this_type, cu);
+ if (SYMBOL_VALUE (sym) < 0)
+ unsigned_enum = 0;
+
+ if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
+ {
+ fields = (struct field *)
+ xrealloc (fields,
+ (num_fields + DW_FIELD_ALLOC_CHUNK)
+ * sizeof (struct field));
+ }
+
+ FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
+ FIELD_TYPE (fields[num_fields]) = NULL;
+ SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
+ FIELD_BITSIZE (fields[num_fields]) = 0;
+
+ num_fields++;
+ }
+ }
+
+ child_die = sibling_die (child_die);
}
- }
- else
- {
- *bytes_read = 4;
- if (cu_header != NULL)
+
+ if (num_fields)
{
- cu_header->initial_length_size = 4;
- cu_header->offset_size = 4;
+ TYPE_NFIELDS (this_type) = num_fields;
+ TYPE_FIELDS (this_type) = (struct field *)
+ TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
+ memcpy (TYPE_FIELDS (this_type), fields,
+ sizeof (struct field) * num_fields);
+ xfree (fields);
}
+ if (unsigned_enum)
+ TYPE_UNSIGNED (this_type) = 1;
}
- return retval;
+ new_symbol (die, this_type, cu);
}
-/* Read an offset from the data stream. The size of the offset is
- given by cu_header->offset_size. */
+/* Extract all information from a DW_TAG_array_type DIE and put it in
+ the DIE's type field. For now, this only handles one dimensional
+ arrays. */
-static LONGEST
-read_offset (bfd *abfd, char *buf, const struct comp_unit_head *cu_header,
- int *bytes_read)
+static struct type *
+read_array_type (struct die_info *die, struct dwarf2_cu *cu)
{
- LONGEST retval = 0;
+ struct objfile *objfile = cu->objfile;
+ struct die_info *child_die;
+ struct type *type = NULL;
+ struct type *element_type, *range_type, *index_type;
+ struct type **range_types = NULL;
+ struct attribute *attr;
+ int ndim = 0;
+ struct cleanup *back_to;
+ char *name;
- switch (cu_header->offset_size)
+ element_type = die_type (die, cu);
+
+ /* Irix 6.2 native cc creates array types without children for
+ arrays with unspecified length. */
+ if (die->child == NULL)
{
- case 4:
- retval = bfd_get_32 (abfd, (bfd_byte *) buf);
- *bytes_read = 4;
- break;
- case 8:
- retval = bfd_get_64 (abfd, (bfd_byte *) buf);
- *bytes_read = 8;
- break;
- default:
- internal_error (__FILE__, __LINE__,
- "read_offset: bad switch");
+ index_type = objfile_type (objfile)->builtin_int;
+ range_type = create_range_type (NULL, index_type, 0, -1);
+ type = create_array_type (NULL, element_type, range_type);
+ return set_die_type (die, type, cu);
}
- return retval;
-}
+ back_to = make_cleanup (null_cleanup, NULL);
+ child_die = die->child;
+ while (child_die && child_die->tag)
+ {
+ if (child_die->tag == DW_TAG_subrange_type)
+ {
+ struct type *child_type = read_type_die (child_die, cu);
+ if (child_type != NULL)
+ {
+ /* The range type was succesfully read. Save it for
+ the array type creation. */
+ if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
+ {
+ range_types = (struct type **)
+ xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
+ * sizeof (struct type *));
+ if (ndim == 0)
+ make_cleanup (free_current_contents, &range_types);
+ }
+ range_types[ndim++] = child_type;
+ }
+ }
+ child_die = sibling_die (child_die);
+ }
-static char *
-read_n_bytes (bfd *abfd, char *buf, unsigned int size)
-{
- /* If the size of a host char is 8 bits, we can return a pointer
- to the buffer, otherwise we have to copy the data to a buffer
- allocated on the temporary obstack. */
- gdb_assert (HOST_CHAR_BIT == 8);
- return buf;
-}
+ /* Dwarf2 dimensions are output from left to right, create the
+ necessary array types in backwards order. */
-static char *
-read_string (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
-{
- /* If the size of a host char is 8 bits, we can return a pointer
- to the string, otherwise we have to copy the string to a buffer
- allocated on the temporary obstack. */
- gdb_assert (HOST_CHAR_BIT == 8);
- if (*buf == '\0')
+ type = element_type;
+
+ if (read_array_order (die, cu) == DW_ORD_col_major)
{
- *bytes_read_ptr = 1;
- return NULL;
+ int i = 0;
+ while (i < ndim)
+ type = create_array_type (NULL, type, range_types[i++]);
}
- *bytes_read_ptr = strlen (buf) + 1;
- return buf;
+ else
+ {
+ while (ndim-- > 0)
+ type = create_array_type (NULL, type, range_types[ndim]);
+ }
+
+ /* Understand Dwarf2 support for vector types (like they occur on
+ the PowerPC w/ AltiVec). Gcc just adds another attribute to the
+ array type. This is not part of the Dwarf2/3 standard yet, but a
+ custom vendor extension. The main difference between a regular
+ array and the vector variant is that vectors are passed by value
+ to functions. */
+ attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
+ if (attr)
+ make_vector_type (type);
+
+ name = dwarf2_name (die, cu);
+ if (name)
+ TYPE_NAME (type) = name;
+
+ do_cleanups (back_to);
+
+ /* Install the type in the die. */
+ return set_die_type (die, type, cu);
}
-static char *
-read_indirect_string (bfd *abfd, char *buf,
- const struct comp_unit_head *cu_header,
- unsigned int *bytes_read_ptr)
+static enum dwarf_array_dim_ordering
+read_array_order (struct die_info *die, struct dwarf2_cu *cu)
{
- LONGEST str_offset = read_offset (abfd, buf, cu_header,
- (int *) bytes_read_ptr);
+ struct attribute *attr;
+
+ attr = dwarf2_attr (die, DW_AT_ordering, cu);
+
+ if (attr) return DW_SND (attr);
+
+ /*
+ GNU F77 is a special case, as at 08/2004 array type info is the
+ opposite order to the dwarf2 specification, but data is still
+ laid out as per normal fortran.
- if (dwarf_str_buffer == NULL)
+ FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
+ version checking.
+ */
+
+ if (cu->language == language_fortran
+ && cu->producer && strstr (cu->producer, "GNU F77"))
{
- error ("DW_FORM_strp used without .debug_str section");
- return NULL;
+ return DW_ORD_row_major;
}
- if (str_offset >= dwarf_str_size)
+
+ switch (cu->language_defn->la_array_ordering)
{
- error ("DW_FORM_strp pointing outside of .debug_str section");
- return NULL;
- }
- gdb_assert (HOST_CHAR_BIT == 8);
- if (dwarf_str_buffer[str_offset] == '\0')
- return NULL;
- return dwarf_str_buffer + str_offset;
+ case array_column_major:
+ return DW_ORD_col_major;
+ case array_row_major:
+ default:
+ return DW_ORD_row_major;
+ };
}
-static unsigned long
-read_unsigned_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
+/* Extract all information from a DW_TAG_set_type DIE and put it in
+ the DIE's type field. */
+
+static struct type *
+read_set_type (struct die_info *die, struct dwarf2_cu *cu)
{
- unsigned long result;
- unsigned int num_read;
- int i, shift;
- unsigned char byte;
+ struct type *set_type = create_set_type (NULL, die_type (die, cu));
- result = 0;
- shift = 0;
- num_read = 0;
- i = 0;
- while (1)
- {
- byte = bfd_get_8 (abfd, (bfd_byte *) buf);
- buf++;
- num_read++;
- result |= ((unsigned long)(byte & 127) << shift);
- if ((byte & 128) == 0)
- {
- break;
- }
- shift += 7;
- }
- *bytes_read_ptr = num_read;
- return result;
+ return set_die_type (die, set_type, cu);
}
-static long
-read_signed_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
+/* First cut: install each common block member as a global variable. */
+
+static void
+read_common_block (struct die_info *die, struct dwarf2_cu *cu)
{
- long result;
- int i, shift, size, num_read;
- unsigned char byte;
+ struct die_info *child_die;
+ struct attribute *attr;
+ struct symbol *sym;
+ CORE_ADDR base = (CORE_ADDR) 0;
- result = 0;
- shift = 0;
- size = 32;
- num_read = 0;
- i = 0;
- while (1)
+ attr = dwarf2_attr (die, DW_AT_location, cu);
+ if (attr)
{
- byte = bfd_get_8 (abfd, (bfd_byte *) buf);
- buf++;
- num_read++;
- result |= ((long)(byte & 127) << shift);
- shift += 7;
- if ((byte & 128) == 0)
- {
- break;
- }
+ /* Support the .debug_loc offsets */
+ if (attr_form_is_block (attr))
+ {
+ base = decode_locdesc (DW_BLOCK (attr), cu);
+ }
+ else if (attr_form_is_section_offset (attr))
+ {
+ dwarf2_complex_location_expr_complaint ();
+ }
+ else
+ {
+ dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
+ "common block member");
+ }
}
- if ((shift < size) && (byte & 0x40))
+ if (die->child != NULL)
{
- result |= -(1 << shift);
+ child_die = die->child;
+ while (child_die && child_die->tag)
+ {
+ sym = new_symbol (child_die, NULL, cu);
+ attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
+ if (attr)
+ {
+ CORE_ADDR byte_offset = 0;
+
+ if (attr_form_is_section_offset (attr))
+ dwarf2_complex_location_expr_complaint ();
+ else if (attr_form_is_constant (attr))
+ byte_offset = dwarf2_get_attr_constant_value (attr, 0);
+ else if (attr_form_is_block (attr))
+ byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
+ else
+ dwarf2_complex_location_expr_complaint ();
+
+ SYMBOL_VALUE_ADDRESS (sym) = base + byte_offset;
+ add_symbol_to_list (sym, &global_symbols);
+ }
+ child_die = sibling_die (child_die);
+ }
}
- *bytes_read_ptr = num_read;
- return result;
}
-static void
-set_cu_language (unsigned int lang)
+/* Create a type for a C++ namespace. */
+
+static struct type *
+read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
{
- switch (lang)
+ struct objfile *objfile = cu->objfile;
+ const char *previous_prefix, *name;
+ int is_anonymous;
+ struct type *type;
+
+ /* For extensions, reuse the type of the original namespace. */
+ if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
{
- case DW_LANG_C89:
- case DW_LANG_C:
- cu_language = language_c;
- break;
- case DW_LANG_C_plus_plus:
- cu_language = language_cplus;
- break;
- case DW_LANG_Fortran77:
- case DW_LANG_Fortran90:
- case DW_LANG_Fortran95:
- cu_language = language_fortran;
- break;
- case DW_LANG_Mips_Assembler:
- cu_language = language_asm;
- break;
- case DW_LANG_Java:
- cu_language = language_java;
- break;
- case DW_LANG_Ada83:
- case DW_LANG_Cobol74:
- case DW_LANG_Cobol85:
- case DW_LANG_Pascal83:
- case DW_LANG_Modula2:
- default:
- cu_language = language_unknown;
- break;
+ struct die_info *ext_die;
+ struct dwarf2_cu *ext_cu = cu;
+ ext_die = dwarf2_extension (die, &ext_cu);
+ type = read_type_die (ext_die, ext_cu);
+ return set_die_type (die, type, cu);
}
- cu_language_defn = language_def (cu_language);
+
+ name = namespace_name (die, &is_anonymous, cu);
+
+ /* Now build the name of the current namespace. */
+
+ previous_prefix = determine_prefix (die, cu);
+ if (previous_prefix[0] != '\0')
+ name = typename_concat (&objfile->objfile_obstack,
+ previous_prefix, name, cu);
+
+ /* Create the type. */
+ type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
+ objfile);
+ TYPE_NAME (type) = (char *) name;
+ TYPE_TAG_NAME (type) = TYPE_NAME (type);
+
+ set_die_type (die, type, cu);
+
+ return type;
}
-/* Return the named attribute or NULL if not there. */
+/* Read a C++ namespace. */
-static struct attribute *
-dwarf_attr (struct die_info *die, unsigned int name)
+static void
+read_namespace (struct die_info *die, struct dwarf2_cu *cu)
{
- unsigned int i;
- struct attribute *spec = NULL;
+ struct objfile *objfile = cu->objfile;
+ const char *name;
+ int is_anonymous;
- for (i = 0; i < die->num_attrs; ++i)
+ /* Add a symbol associated to this if we haven't seen the namespace
+ before. Also, add a using directive if it's an anonymous
+ namespace. */
+
+ if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
{
- if (die->attrs[i].name == name)
+ struct type *type;
+
+ type = read_type_die (die, cu);
+ new_symbol (die, type, cu);
+
+ name = namespace_name (die, &is_anonymous, cu);
+ if (is_anonymous)
{
- return &die->attrs[i];
+ const char *previous_prefix = determine_prefix (die, cu);
+ cp_add_using_directive (previous_prefix, TYPE_NAME (type));
}
- if (die->attrs[i].name == DW_AT_specification
- || die->attrs[i].name == DW_AT_abstract_origin)
- spec = &die->attrs[i];
}
- if (spec)
- {
- struct die_info *ref_die =
- follow_die_ref (dwarf2_get_ref_die_offset (spec));
- if (ref_die)
- return dwarf_attr (ref_die, name);
+ if (die->child != NULL)
+ {
+ struct die_info *child_die = die->child;
+
+ while (child_die && child_die->tag)
+ {
+ process_die (child_die, cu);
+ child_die = sibling_die (child_die);
+ }
}
-
- return NULL;
}
-static int
-die_is_declaration (struct die_info *die)
+/* Read a Fortran module. */
+
+static void
+read_module (struct die_info *die, struct dwarf2_cu *cu)
{
- return (dwarf_attr (die, DW_AT_declaration)
- && ! dwarf_attr (die, DW_AT_specification));
-}
+ struct die_info *child_die = die->child;
-/* Decode the line number information for the compilation unit whose
- line number info is at OFFSET in the .debug_line section.
- The compilation directory of the file is passed in COMP_DIR. */
+ /* FIXME: Support the separate Fortran module namespaces. */
-struct filenames
-{
- unsigned int num_files;
- struct fileinfo
+ while (child_die && child_die->tag)
{
- char *name;
- unsigned int dir;
- unsigned int time;
- unsigned int size;
+ process_die (child_die, cu);
+ child_die = sibling_die (child_die);
}
- *files;
-};
+}
-struct directories
- {
- unsigned int num_dirs;
- char **dirs;
- };
+/* Return the name of the namespace represented by DIE. Set
+ *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
+ namespace. */
-static void
-dwarf_decode_lines (unsigned int offset, char *comp_dir, bfd *abfd,
- const struct comp_unit_head *cu_header)
+static const char *
+namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
{
- char *line_ptr;
- char *line_end;
- struct line_head lh;
- struct cleanup *back_to;
- unsigned int i, bytes_read;
- char *cur_file, *cur_dir;
- unsigned char op_code, extended_op, adj_opcode;
+ struct die_info *current_die;
+ const char *name = NULL;
-#define FILE_ALLOC_CHUNK 5
-#define DIR_ALLOC_CHUNK 5
+ /* Loop through the extensions until we find a name. */
- struct filenames files;
- struct directories dirs;
-
- if (dwarf_line_buffer == NULL)
+ for (current_die = die;
+ current_die != NULL;
+ current_die = dwarf2_extension (die, &cu))
{
- complain (&dwarf2_missing_line_number_section);
- return;
+ name = dwarf2_name (current_die, cu);
+ if (name != NULL)
+ break;
}
- files.num_files = 0;
- files.files = NULL;
+ /* Is it an anonymous namespace? */
- dirs.num_dirs = 0;
- dirs.dirs = NULL;
+ *is_anonymous = (name == NULL);
+ if (*is_anonymous)
+ name = "(anonymous namespace)";
- line_ptr = dwarf_line_buffer + offset;
+ return name;
+}
- /* read in the prologue */
- lh.total_length = read_initial_length (abfd, line_ptr, NULL, &bytes_read);
- line_ptr += bytes_read;
- line_end = line_ptr + lh.total_length;
- lh.version = read_2_bytes (abfd, line_ptr);
- line_ptr += 2;
- lh.prologue_length = read_offset (abfd, line_ptr, cu_header, &bytes_read);
- line_ptr += bytes_read;
- lh.minimum_instruction_length = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- lh.default_is_stmt = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- lh.line_base = read_1_signed_byte (abfd, line_ptr);
- line_ptr += 1;
- lh.line_range = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- lh.opcode_base = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- lh.standard_opcode_lengths = (unsigned char *)
- xmalloc (lh.opcode_base * sizeof (unsigned char));
- back_to = make_cleanup (free_current_contents, &lh.standard_opcode_lengths);
+/* Extract all information from a DW_TAG_pointer_type DIE and add to
+ the user defined type vector. */
- lh.standard_opcode_lengths[0] = 1;
- for (i = 1; i < lh.opcode_base; ++i)
- {
- lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- }
+static struct type *
+read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
+ struct comp_unit_head *cu_header = &cu->header;
+ struct type *type;
+ struct attribute *attr_byte_size;
+ struct attribute *attr_address_class;
+ int byte_size, addr_class;
- /* Read directory table */
- while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
+ type = lookup_pointer_type (die_type (die, cu));
+
+ attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr_byte_size)
+ byte_size = DW_UNSND (attr_byte_size);
+ else
+ byte_size = cu_header->addr_size;
+
+ attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
+ if (attr_address_class)
+ addr_class = DW_UNSND (attr_address_class);
+ else
+ addr_class = DW_ADDR_none;
+
+ /* If the pointer size or address class is different than the
+ default, create a type variant marked as such and set the
+ length accordingly. */
+ if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
{
- line_ptr += bytes_read;
- if ((dirs.num_dirs % DIR_ALLOC_CHUNK) == 0)
+ if (gdbarch_address_class_type_flags_p (gdbarch))
{
- dirs.dirs = (char **)
- xrealloc (dirs.dirs,
- (dirs.num_dirs + DIR_ALLOC_CHUNK) * sizeof (char *));
- if (dirs.num_dirs == 0)
- make_cleanup (free_current_contents, &dirs.dirs);
- }
- dirs.dirs[dirs.num_dirs++] = cur_dir;
- }
- line_ptr += bytes_read;
+ int type_flags;
- /* Read file name table */
- while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
- {
- line_ptr += bytes_read;
- if ((files.num_files % FILE_ALLOC_CHUNK) == 0)
+ type_flags = gdbarch_address_class_type_flags
+ (gdbarch, byte_size, addr_class);
+ gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
+ == 0);
+ type = make_type_with_address_space (type, type_flags);
+ }
+ else if (TYPE_LENGTH (type) != byte_size)
{
- files.files = (struct fileinfo *)
- xrealloc (files.files,
- (files.num_files + FILE_ALLOC_CHUNK)
- * sizeof (struct fileinfo));
- if (files.num_files == 0)
- make_cleanup (free_current_contents, &files.files);
+ complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
}
- files.files[files.num_files].name = cur_file;
- files.files[files.num_files].dir =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- files.files[files.num_files].time =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- files.files[files.num_files].size =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- files.num_files++;
+ else {
+ /* Should we also complain about unhandled address classes? */
+ }
}
- line_ptr += bytes_read;
- /* Read the statement sequences until there's nothing left. */
- while (line_ptr < line_end)
- {
- /* state machine registers */
- CORE_ADDR address = 0;
- unsigned int file = 1;
- unsigned int line = 1;
- unsigned int column = 0;
- int is_stmt = lh.default_is_stmt;
- int basic_block = 0;
- int end_sequence = 0;
+ TYPE_LENGTH (type) = byte_size;
+ return set_die_type (die, type, cu);
+}
- /* Start a subfile for the current file of the state machine. */
- if (files.num_files >= file)
- {
- /* The file and directory tables are 0 based, the references
- are 1 based. */
- dwarf2_start_subfile (files.files[file - 1].name,
- (files.files[file - 1].dir
- ? dirs.dirs[files.files[file - 1].dir - 1]
- : comp_dir));
- }
+/* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
+ the user defined type vector. */
- /* Decode the table. */
- while (!end_sequence)
- {
- op_code = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
+static struct type *
+read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct type *type;
+ struct type *to_type;
+ struct type *domain;
- if (op_code >= lh.opcode_base)
- { /* Special operand. */
- adj_opcode = op_code - lh.opcode_base;
- address += (adj_opcode / lh.line_range)
- * lh.minimum_instruction_length;
- line += lh.line_base + (adj_opcode % lh.line_range);
- /* append row to matrix using current values */
- record_line (current_subfile, line, address);
- basic_block = 1;
- }
- else switch (op_code)
- {
- case DW_LNS_extended_op:
- line_ptr += 1; /* ignore length */
- extended_op = read_1_byte (abfd, line_ptr);
- line_ptr += 1;
- switch (extended_op)
- {
- case DW_LNE_end_sequence:
- end_sequence = 1;
- /* Don't call record_line here. The end_sequence
- instruction provides the address of the first byte
- *after* the last line in the sequence; it's not the
- address of any real source line. However, the GDB
- linetable structure only records the starts of lines,
- not the ends. This is a weakness of GDB. */
- break;
- case DW_LNE_set_address:
- address = read_address (abfd, line_ptr, cu_header, &bytes_read);
- line_ptr += bytes_read;
- address += baseaddr;
- break;
- case DW_LNE_define_file:
- cur_file = read_string (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- if ((files.num_files % FILE_ALLOC_CHUNK) == 0)
- {
- files.files = (struct fileinfo *)
- xrealloc (files.files,
- (files.num_files + FILE_ALLOC_CHUNK)
- * sizeof (struct fileinfo));
- if (files.num_files == 0)
- make_cleanup (free_current_contents, &files.files);
- }
- files.files[files.num_files].name = cur_file;
- files.files[files.num_files].dir =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- files.files[files.num_files].time =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- files.files[files.num_files].size =
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- files.num_files++;
- break;
- default:
- complain (&dwarf2_mangled_line_number_section);
- goto done;
- }
- break;
- case DW_LNS_copy:
- record_line (current_subfile, line, address);
- basic_block = 0;
- break;
- case DW_LNS_advance_pc:
- address += lh.minimum_instruction_length
- * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- break;
- case DW_LNS_advance_line:
- line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- break;
- case DW_LNS_set_file:
- /* The file and directory tables are 0 based, the references
- are 1 based. */
- file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- dwarf2_start_subfile
- (files.files[file - 1].name,
- (files.files[file - 1].dir
- ? dirs.dirs[files.files[file - 1].dir - 1]
- : comp_dir));
- break;
- case DW_LNS_set_column:
- column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- break;
- case DW_LNS_negate_stmt:
- is_stmt = (!is_stmt);
- break;
- case DW_LNS_set_basic_block:
- basic_block = 1;
- break;
- /* Add to the address register of the state machine the
- address increment value corresponding to special opcode
- 255. Ie, this value is scaled by the minimum instruction
- length since special opcode 255 would have scaled the
- the increment. */
- case DW_LNS_const_add_pc:
- address += (lh.minimum_instruction_length
- * ((255 - lh.opcode_base) / lh.line_range));
- break;
- case DW_LNS_fixed_advance_pc:
- address += read_2_bytes (abfd, line_ptr);
- line_ptr += 2;
- break;
- default:
- { /* Unknown standard opcode, ignore it. */
- int i;
- for (i = 0; i < lh.standard_opcode_lengths[op_code]; i++)
- {
- (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
- line_ptr += bytes_read;
- }
- }
- }
- }
+ to_type = die_type (die, cu);
+ domain = die_containing_type (die, cu);
+
+ if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
+ type = lookup_methodptr_type (to_type);
+ else
+ type = lookup_memberptr_type (to_type, domain);
+
+ return set_die_type (die, type, cu);
+}
+
+/* Extract all information from a DW_TAG_reference_type DIE and add to
+ the user defined type vector. */
+
+static struct type *
+read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct comp_unit_head *cu_header = &cu->header;
+ struct type *type;
+ struct attribute *attr;
+
+ type = lookup_reference_type (die_type (die, cu));
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ {
+ TYPE_LENGTH (type) = DW_UNSND (attr);
}
-done:
- do_cleanups (back_to);
+ else
+ {
+ TYPE_LENGTH (type) = cu_header->addr_size;
+ }
+ return set_die_type (die, type, cu);
}
-/* Start a subfile for DWARF. FILENAME is the name of the file and
- DIRNAME the name of the source directory which contains FILENAME
- or NULL if not known.
- This routine tries to keep line numbers from identical absolute and
- relative file names in a common subfile.
+static struct type *
+read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *base_type, *cv_type;
- Using the `list' example from the GDB testsuite, which resides in
- /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
- of /srcdir/list0.c yields the following debugging information for list0.c:
+ base_type = die_type (die, cu);
+ cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
+ return set_die_type (die, cv_type, cu);
+}
- DW_AT_name: /srcdir/list0.c
- DW_AT_comp_dir: /compdir
- files.files[0].name: list0.h
- files.files[0].dir: /srcdir
- files.files[1].name: list0.c
- files.files[1].dir: /srcdir
+static struct type *
+read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *base_type, *cv_type;
- The line number information for list0.c has to end up in a single
- subfile, so that `break /srcdir/list0.c:1' works as expected. */
+ base_type = die_type (die, cu);
+ cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
+ return set_die_type (die, cv_type, cu);
+}
-static void
-dwarf2_start_subfile (char *filename, char *dirname)
+/* Extract all information from a DW_TAG_string_type DIE and add to
+ the user defined type vector. It isn't really a user defined type,
+ but it behaves like one, with other DIE's using an AT_user_def_type
+ attribute to reference it. */
+
+static struct type *
+read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
{
- /* If the filename isn't absolute, try to match an existing subfile
- with the full pathname. */
+ struct objfile *objfile = cu->objfile;
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
+ struct type *type, *range_type, *index_type, *char_type;
+ struct attribute *attr;
+ unsigned int length;
- if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
+ attr = dwarf2_attr (die, DW_AT_string_length, cu);
+ if (attr)
{
- struct subfile *subfile;
- char *fullname = concat (dirname, "/", filename, NULL);
-
- for (subfile = subfiles; subfile; subfile = subfile->next)
- {
- if (FILENAME_CMP (subfile->name, fullname) == 0)
- {
- current_subfile = subfile;
- xfree (fullname);
- return;
- }
- }
- xfree (fullname);
+ length = DW_UNSND (attr);
+ }
+ else
+ {
+ /* check for the DW_AT_byte_size attribute */
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ {
+ length = DW_UNSND (attr);
+ }
+ else
+ {
+ length = 1;
+ }
}
- start_subfile (filename, dirname);
+
+ index_type = objfile_type (objfile)->builtin_int;
+ range_type = create_range_type (NULL, index_type, 1, length);
+ char_type = language_string_char_type (cu->language_defn, gdbarch);
+ type = create_string_type (NULL, char_type, range_type);
+
+ return set_die_type (die, type, cu);
}
-/* Given a pointer to a DWARF information entry, figure out if we need
- to make a symbol table entry for it, and if so, create a new entry
- and return a pointer to it.
- If TYPE is NULL, determine symbol type from the die, otherwise
- used the passed type. */
+/* Handle DIES due to C code like:
-static struct symbol *
-new_symbol (struct die_info *die, struct type *type, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+ struct foo
+ {
+ int (*funcp)(int a, long l);
+ int b;
+ };
+
+ ('funcp' generates a DW_TAG_subroutine_type DIE)
+ */
+
+static struct type *
+read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
{
- struct symbol *sym = NULL;
- char *name;
- struct attribute *attr = NULL;
- struct attribute *attr2 = NULL;
- CORE_ADDR addr;
+ struct type *type; /* Type that this function returns */
+ struct type *ftype; /* Function that returns above type */
+ struct attribute *attr;
- name = dwarf2_linkage_name (die);
- if (name)
+ type = die_type (die, cu);
+ ftype = lookup_function_type (type);
+
+ /* All functions in C++, Pascal and Java have prototypes. */
+ attr = dwarf2_attr (die, DW_AT_prototyped, cu);
+ if ((attr && (DW_UNSND (attr) != 0))
+ || cu->language == language_cplus
+ || cu->language == language_java
+ || cu->language == language_pascal)
+ TYPE_PROTOTYPED (ftype) = 1;
+
+ /* Store the calling convention in the type if it's available in
+ the subroutine die. Otherwise set the calling convention to
+ the default value DW_CC_normal. */
+ attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
+ TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal;
+
+ /* We need to add the subroutine type to the die immediately so
+ we don't infinitely recurse when dealing with parameters
+ declared as the same subroutine type. */
+ set_die_type (die, ftype, cu);
+
+ if (die->child != NULL)
{
- sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
- sizeof (struct symbol));
- OBJSTAT (objfile, n_syms++);
- memset (sym, 0, sizeof (struct symbol));
- SYMBOL_NAME (sym) = obsavestring (name, strlen (name),
- &objfile->symbol_obstack);
+ struct die_info *child_die;
+ int nparams = 0;
+ int iparams = 0;
- /* Default assumptions.
- Use the passed type or decode it from the die. */
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- SYMBOL_CLASS (sym) = LOC_STATIC;
- if (type != NULL)
- SYMBOL_TYPE (sym) = type;
- else
- SYMBOL_TYPE (sym) = die_type (die, objfile, cu_header);
- attr = dwarf_attr (die, DW_AT_decl_line);
- if (attr)
+ /* Count the number of parameters.
+ FIXME: GDB currently ignores vararg functions, but knows about
+ vararg member functions. */
+ child_die = die->child;
+ while (child_die && child_die->tag)
{
- SYMBOL_LINE (sym) = DW_UNSND (attr);
+ if (child_die->tag == DW_TAG_formal_parameter)
+ nparams++;
+ else if (child_die->tag == DW_TAG_unspecified_parameters)
+ TYPE_VARARGS (ftype) = 1;
+ child_die = sibling_die (child_die);
}
- /* If this symbol is from a C++ compilation, then attempt to
- cache the demangled form for future reference. This is a
- typical time versus space tradeoff, that was decided in favor
- of time because it sped up C++ symbol lookups by a factor of
- about 20. */
+ /* Allocate storage for parameters and fill them in. */
+ TYPE_NFIELDS (ftype) = nparams;
+ TYPE_FIELDS (ftype) = (struct field *)
+ TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
- SYMBOL_LANGUAGE (sym) = cu_language;
- SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
- switch (die->tag)
+ child_die = die->child;
+ while (child_die && child_die->tag)
{
- case DW_TAG_label:
- attr = dwarf_attr (die, DW_AT_low_pc);
- if (attr)
- {
- SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
- }
- SYMBOL_CLASS (sym) = LOC_LABEL;
- break;
- case DW_TAG_subprogram:
- /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
- finish_block. */
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- attr2 = dwarf_attr (die, DW_AT_external);
- if (attr2 && (DW_UNSND (attr2) != 0))
- {
- add_symbol_to_list (sym, &global_symbols);
- }
- else
- {
- add_symbol_to_list (sym, list_in_scope);
- }
- break;
- case DW_TAG_variable:
- /* Compilation with minimal debug info may result in variables
- with missing type entries. Change the misleading `void' type
- to something sensible. */
- if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
- SYMBOL_TYPE (sym) = init_type (TYPE_CODE_INT,
- TARGET_INT_BIT / HOST_CHAR_BIT, 0,
- "<variable, no debug info>",
- objfile);
- attr = dwarf_attr (die, DW_AT_const_value);
- if (attr)
+ if (child_die->tag == DW_TAG_formal_parameter)
{
- dwarf2_const_value (attr, sym, objfile, cu_header);
- attr2 = dwarf_attr (die, DW_AT_external);
- if (attr2 && (DW_UNSND (attr2) != 0))
- add_symbol_to_list (sym, &global_symbols);
+ /* Dwarf2 has no clean way to discern C++ static and non-static
+ member functions. G++ helps GDB by marking the first
+ parameter for non-static member functions (which is the
+ this pointer) as artificial. We pass this information
+ to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
+ attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
+ if (attr)
+ TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
else
- add_symbol_to_list (sym, list_in_scope);
- break;
+ TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
+ TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
+ iparams++;
}
- attr = dwarf_attr (die, DW_AT_location);
- if (attr)
- {
- attr2 = dwarf_attr (die, DW_AT_external);
- if (attr2 && (DW_UNSND (attr2) != 0))
- {
- SYMBOL_VALUE_ADDRESS (sym) =
- decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
- add_symbol_to_list (sym, &global_symbols);
-
- /* In shared libraries the address of the variable
- in the location descriptor might still be relocatable,
- so its value could be zero.
- Enter the symbol as a LOC_UNRESOLVED symbol, if its
- value is zero, the address of the variable will then
- be determined from the minimal symbol table whenever
- the variable is referenced. */
- if (SYMBOL_VALUE_ADDRESS (sym))
- {
- fixup_symbol_section (sym, objfile);
- SYMBOL_VALUE_ADDRESS (sym) +=
- ANOFFSET (objfile->section_offsets,
- SYMBOL_SECTION (sym));
- SYMBOL_CLASS (sym) = LOC_STATIC;
- }
- else
- SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
- }
- else
- {
- SYMBOL_VALUE (sym) = addr =
- decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
- add_symbol_to_list (sym, list_in_scope);
- if (optimized_out)
- {
- SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
- }
- else if (isreg)
- {
- SYMBOL_CLASS (sym) = LOC_REGISTER;
- SYMBOL_VALUE (sym) =
- DWARF2_REG_TO_REGNUM (SYMBOL_VALUE (sym));
- }
- else if (offreg)
- {
- SYMBOL_CLASS (sym) = LOC_BASEREG;
- SYMBOL_BASEREG (sym) = DWARF2_REG_TO_REGNUM (basereg);
- }
- else if (islocal)
- {
- SYMBOL_CLASS (sym) = LOC_LOCAL;
- }
- else
- {
- fixup_symbol_section (sym, objfile);
- SYMBOL_VALUE_ADDRESS (sym) =
- addr + ANOFFSET (objfile->section_offsets,
- SYMBOL_SECTION (sym));
- SYMBOL_CLASS (sym) = LOC_STATIC;
- }
- }
- }
- else
- {
- /* We do not know the address of this symbol.
- If it is an external symbol and we have type information
- for it, enter the symbol as a LOC_UNRESOLVED symbol.
- The address of the variable will then be determined from
- the minimal symbol table whenever the variable is
- referenced. */
- attr2 = dwarf_attr (die, DW_AT_external);
- if (attr2 && (DW_UNSND (attr2) != 0)
- && dwarf_attr (die, DW_AT_type) != NULL)
- {
- SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
- add_symbol_to_list (sym, &global_symbols);
- }
- }
- break;
- case DW_TAG_formal_parameter:
- attr = dwarf_attr (die, DW_AT_location);
- if (attr)
- {
- SYMBOL_VALUE (sym) =
- decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
- if (isreg)
- {
- SYMBOL_CLASS (sym) = LOC_REGPARM;
- SYMBOL_VALUE (sym) =
- DWARF2_REG_TO_REGNUM (SYMBOL_VALUE (sym));
- }
- else if (offreg)
- {
- if (isderef)
- {
- if (basereg != frame_base_reg)
- complain (&dwarf2_complex_location_expr);
- SYMBOL_CLASS (sym) = LOC_REF_ARG;
- }
- else
- {
- SYMBOL_CLASS (sym) = LOC_BASEREG_ARG;
- SYMBOL_BASEREG (sym) = DWARF2_REG_TO_REGNUM (basereg);
- }
- }
- else
- {
- SYMBOL_CLASS (sym) = LOC_ARG;
- }
- }
- attr = dwarf_attr (die, DW_AT_const_value);
- if (attr)
- {
- dwarf2_const_value (attr, sym, objfile, cu_header);
- }
- add_symbol_to_list (sym, list_in_scope);
- break;
- case DW_TAG_unspecified_parameters:
- /* From varargs functions; gdb doesn't seem to have any
- interest in this information, so just ignore it for now.
- (FIXME?) */
- break;
- case DW_TAG_class_type:
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- case DW_TAG_enumeration_type:
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
- add_symbol_to_list (sym, list_in_scope);
-
- /* The semantics of C++ state that "struct foo { ... }" also
- defines a typedef for "foo". Synthesize a typedef symbol so
- that "ptype foo" works as expected. */
- if (cu_language == language_cplus)
- {
- struct symbol *typedef_sym = (struct symbol *)
- obstack_alloc (&objfile->symbol_obstack,
- sizeof (struct symbol));
- *typedef_sym = *sym;
- SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE;
- if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
- TYPE_NAME (SYMBOL_TYPE (sym)) =
- obsavestring (SYMBOL_NAME (sym),
- strlen (SYMBOL_NAME (sym)),
- &objfile->type_obstack);
- add_symbol_to_list (typedef_sym, list_in_scope);
- }
- break;
- case DW_TAG_typedef:
- case DW_TAG_base_type:
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, list_in_scope);
- break;
- case DW_TAG_enumerator:
- attr = dwarf_attr (die, DW_AT_const_value);
- if (attr)
- {
- dwarf2_const_value (attr, sym, objfile, cu_header);
- }
- add_symbol_to_list (sym, list_in_scope);
- break;
- default:
- /* Not a tag we recognize. Hopefully we aren't processing
- trash data, but since we must specifically ignore things
- we don't recognize, there is nothing else we should do at
- this point. */
- complain (&dwarf2_unsupported_tag, dwarf_tag_name (die->tag));
- break;
+ child_die = sibling_die (child_die);
}
}
- return (sym);
+
+ return ftype;
}
-/* Copy constant value from an attribute to a symbol. */
+static struct type *
+read_typedef (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct attribute *attr;
+ const char *name = NULL;
+ struct type *this_type;
+
+ name = dwarf2_full_name (die, cu);
+ this_type = init_type (TYPE_CODE_TYPEDEF, 0,
+ TYPE_FLAG_TARGET_STUB, NULL, objfile);
+ TYPE_NAME (this_type) = (char *) name;
+ set_die_type (die, this_type, cu);
+ TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
+ return this_type;
+}
-static void
-dwarf2_const_value (struct attribute *attr, struct symbol *sym,
- struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+/* Find a representation of a given base type and install
+ it in the TYPE field of the die. */
+
+static struct type *
+read_base_type (struct die_info *die, struct dwarf2_cu *cu)
{
- struct dwarf_block *blk;
+ struct objfile *objfile = cu->objfile;
+ struct type *type;
+ struct attribute *attr;
+ int encoding = 0, size = 0;
+ char *name;
+ enum type_code code = TYPE_CODE_INT;
+ int type_flags = 0;
+ struct type *target_type = NULL;
- switch (attr->form)
+ attr = dwarf2_attr (die, DW_AT_encoding, cu);
+ if (attr)
{
- case DW_FORM_addr:
- if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
- complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym),
- cu_header->addr_size, TYPE_LENGTH (SYMBOL_TYPE (sym)));
- SYMBOL_VALUE_BYTES (sym) = (char *)
- obstack_alloc (&objfile->symbol_obstack, cu_header->addr_size);
- store_address (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
- DW_ADDR (attr));
- SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
- break;
- case DW_FORM_block1:
- case DW_FORM_block2:
- case DW_FORM_block4:
- case DW_FORM_block:
- blk = DW_BLOCK (attr);
- if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
- complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym),
- blk->size, TYPE_LENGTH (SYMBOL_TYPE (sym)));
- SYMBOL_VALUE_BYTES (sym) = (char *)
- obstack_alloc (&objfile->symbol_obstack, blk->size);
- memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
- SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
- break;
+ encoding = DW_UNSND (attr);
+ }
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ {
+ size = DW_UNSND (attr);
+ }
+ name = dwarf2_name (die, cu);
+ if (!name)
+ {
+ complaint (&symfile_complaints,
+ _("DW_AT_name missing from DW_TAG_base_type"));
+ }
- /* The DW_AT_const_value attributes are supposed to carry the
- symbol's value "represented as it would be on the target
- architecture." By the time we get here, it's already been
- converted to host endianness, so we just need to sign- or
- zero-extend it as appropriate. */
- case DW_FORM_data1:
- dwarf2_const_value_data (attr, sym, 8);
- break;
- case DW_FORM_data2:
- dwarf2_const_value_data (attr, sym, 16);
- break;
- case DW_FORM_data4:
- dwarf2_const_value_data (attr, sym, 32);
- break;
- case DW_FORM_data8:
- dwarf2_const_value_data (attr, sym, 64);
- break;
+ switch (encoding)
+ {
+ case DW_ATE_address:
+ /* Turn DW_ATE_address into a void * pointer. */
+ code = TYPE_CODE_PTR;
+ type_flags |= TYPE_FLAG_UNSIGNED;
+ target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
+ break;
+ case DW_ATE_boolean:
+ code = TYPE_CODE_BOOL;
+ type_flags |= TYPE_FLAG_UNSIGNED;
+ break;
+ case DW_ATE_complex_float:
+ code = TYPE_CODE_COMPLEX;
+ target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
+ break;
+ case DW_ATE_decimal_float:
+ code = TYPE_CODE_DECFLOAT;
+ break;
+ case DW_ATE_float:
+ code = TYPE_CODE_FLT;
+ break;
+ case DW_ATE_signed:
+ break;
+ case DW_ATE_unsigned:
+ type_flags |= TYPE_FLAG_UNSIGNED;
+ break;
+ case DW_ATE_signed_char:
+ if (cu->language == language_ada || cu->language == language_m2
+ || cu->language == language_pascal)
+ code = TYPE_CODE_CHAR;
+ break;
+ case DW_ATE_unsigned_char:
+ if (cu->language == language_ada || cu->language == language_m2
+ || cu->language == language_pascal)
+ code = TYPE_CODE_CHAR;
+ type_flags |= TYPE_FLAG_UNSIGNED;
+ break;
+ default:
+ complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
+ dwarf_type_encoding_name (encoding));
+ break;
+ }
- case DW_FORM_sdata:
- SYMBOL_VALUE (sym) = DW_SND (attr);
- SYMBOL_CLASS (sym) = LOC_CONST;
- break;
+ type = init_type (code, size, type_flags, NULL, objfile);
+ TYPE_NAME (type) = name;
+ TYPE_TARGET_TYPE (type) = target_type;
- case DW_FORM_udata:
- SYMBOL_VALUE (sym) = DW_UNSND (attr);
- SYMBOL_CLASS (sym) = LOC_CONST;
- break;
+ if (name && strcmp (name, "char") == 0)
+ TYPE_NOSIGN (type) = 1;
- default:
- complain (&dwarf2_unsupported_const_value_attr,
- dwarf_form_name (attr->form));
- SYMBOL_VALUE (sym) = 0;
- SYMBOL_CLASS (sym) = LOC_CONST;
- break;
- }
+ return set_die_type (die, type, cu);
}
+/* Read the given DW_AT_subrange DIE. */
-/* Given an attr with a DW_FORM_dataN value in host byte order, sign-
- or zero-extend it as appropriate for the symbol's type. */
-static void
-dwarf2_const_value_data (struct attribute *attr,
- struct symbol *sym,
- int bits)
+static struct type *
+read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
{
- LONGEST l = DW_UNSND (attr);
-
- if (bits < sizeof (l) * 8)
+ struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
+ struct type *base_type;
+ struct type *range_type;
+ struct attribute *attr;
+ LONGEST low = 0;
+ LONGEST high = -1;
+ char *name;
+ LONGEST negative_mask;
+
+ base_type = die_type (die, cu);
+ if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
{
- if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
- l &= ((LONGEST) 1 << bits) - 1;
+ complaint (&symfile_complaints,
+ _("DW_AT_type missing from DW_TAG_subrange_type"));
+ base_type
+ = init_type (TYPE_CODE_INT, gdbarch_addr_bit (gdbarch) / 8,
+ 0, NULL, cu->objfile);
+ }
+
+ if (cu->language == language_fortran)
+ {
+ /* FORTRAN implies a lower bound of 1, if not given. */
+ low = 1;
+ }
+
+ /* FIXME: For variable sized arrays either of these could be
+ a variable rather than a constant value. We'll allow it,
+ but we don't know how to handle it. */
+ attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
+ if (attr)
+ low = dwarf2_get_attr_constant_value (attr, 0);
+
+ attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
+ if (attr)
+ {
+ if (attr->form == DW_FORM_block1)
+ {
+ /* GCC encodes arrays with unspecified or dynamic length
+ with a DW_FORM_block1 attribute.
+ FIXME: GDB does not yet know how to handle dynamic
+ arrays properly, treat them as arrays with unspecified
+ length for now.
+
+ FIXME: jimb/2003-09-22: GDB does not really know
+ how to handle arrays of unspecified length
+ either; we just represent them as zero-length
+ arrays. Choose an appropriate upper bound given
+ the lower bound we've computed above. */
+ high = low - 1;
+ }
else
- l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
+ high = dwarf2_get_attr_constant_value (attr, 1);
}
- SYMBOL_VALUE (sym) = l;
- SYMBOL_CLASS (sym) = LOC_CONST;
-}
+ negative_mask =
+ (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
+ if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
+ low |= negative_mask;
+ if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
+ high |= negative_mask;
+ range_type = create_range_type (NULL, base_type, low, high);
-/* Return the type of the die in question using its DW_AT_type attribute. */
+ name = dwarf2_name (die, cu);
+ if (name)
+ TYPE_NAME (range_type) = name;
+
+ attr = dwarf2_attr (die, DW_AT_byte_size, cu);
+ if (attr)
+ TYPE_LENGTH (range_type) = DW_UNSND (attr);
+ return set_die_type (die, range_type, cu);
+}
+
static struct type *
-die_type (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct type *type;
- struct attribute *type_attr;
- struct die_info *type_die;
- unsigned int ref;
- type_attr = dwarf_attr (die, DW_AT_type);
- if (!type_attr)
- {
- /* A missing DW_AT_type represents a void type. */
- return dwarf2_fundamental_type (objfile, FT_VOID);
- }
- else
- {
- ref = dwarf2_get_ref_die_offset (type_attr);
- type_die = follow_die_ref (ref);
- if (!type_die)
- {
- error ("Dwarf Error: Cannot find referent at offset %d.", ref);
- return NULL;
- }
- }
- type = tag_type_to_type (type_die, objfile, cu_header);
- if (!type)
- {
- dump_die (type_die);
- error ("Dwarf Error: Problem turning type die at offset into gdb type.");
- }
- return type;
+ /* For now, we only support the C meaning of an unspecified type: void. */
+
+ type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
+ TYPE_NAME (type) = dwarf2_name (die, cu);
+
+ return set_die_type (die, type, cu);
}
-/* Return the containing type of the die in question using its
- DW_AT_containing_type attribute. */
+/* Trivial hash function for die_info: the hash value of a DIE
+ is its offset in .debug_info for this objfile. */
-static struct type *
-die_containing_type (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+static hashval_t
+die_hash (const void *item)
{
- struct type *type = NULL;
- struct attribute *type_attr;
- struct die_info *type_die = NULL;
- unsigned int ref;
+ const struct die_info *die = item;
+ return die->offset;
+}
- type_attr = dwarf_attr (die, DW_AT_containing_type);
- if (type_attr)
- {
- ref = dwarf2_get_ref_die_offset (type_attr);
- type_die = follow_die_ref (ref);
- if (!type_die)
- {
- error ("Dwarf Error: Cannot find referent at offset %d.", ref);
- return NULL;
- }
- type = tag_type_to_type (type_die, objfile, cu_header);
- }
- if (!type)
- {
- if (type_die)
- dump_die (type_die);
- error ("Dwarf Error: Problem turning containing type into gdb type.");
- }
- return type;
+/* Trivial comparison function for die_info structures: two DIEs
+ are equal if they have the same offset. */
+
+static int
+die_eq (const void *item_lhs, const void *item_rhs)
+{
+ const struct die_info *die_lhs = item_lhs;
+ const struct die_info *die_rhs = item_rhs;
+ return die_lhs->offset == die_rhs->offset;
}
-#if 0
-static struct type *
-type_at_offset (unsigned int offset, struct objfile *objfile)
+/* Read a whole compilation unit into a linked list of dies. */
+
+static struct die_info *
+read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
{
- struct die_info *die;
- struct type *type;
+ struct die_reader_specs reader_specs;
+
+ gdb_assert (cu->die_hash == NULL);
+ cu->die_hash
+ = htab_create_alloc_ex (cu->header.length / 12,
+ die_hash,
+ die_eq,
+ NULL,
+ &cu->comp_unit_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
+
+ init_cu_die_reader (&reader_specs, cu);
+
+ return read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
+}
+
+/* Main entry point for reading a DIE and all children.
+ Read the DIE and dump it if requested. */
+
+static struct die_info *
+read_die_and_children (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ gdb_byte **new_info_ptr,
+ struct die_info *parent)
+{
+ struct die_info *result = read_die_and_children_1 (reader, info_ptr,
+ new_info_ptr, parent);
- die = follow_die_ref (offset);
- if (!die)
+ if (dwarf2_die_debug)
{
- error ("Dwarf Error: Cannot find type referent at offset %d.", offset);
- return NULL;
+ fprintf_unfiltered (gdb_stdlog,
+ "\nRead die from %s of %s:\n",
+ reader->buffer == dwarf2_per_objfile->info.buffer
+ ? ".debug_info"
+ : reader->buffer == dwarf2_per_objfile->types.buffer
+ ? ".debug_types"
+ : "unknown section",
+ reader->abfd->filename);
+ dump_die (result, dwarf2_die_debug);
}
- type = tag_type_to_type (die, objfile);
- return type;
+
+ return result;
}
-#endif
-static struct type *
-tag_type_to_type (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+/* Read a single die and all its descendents. Set the die's sibling
+ field to NULL; set other fields in the die correctly, and set all
+ of the descendents' fields correctly. Set *NEW_INFO_PTR to the
+ location of the info_ptr after reading all of those dies. PARENT
+ is the parent of the die in question. */
+
+static struct die_info *
+read_die_and_children_1 (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ gdb_byte **new_info_ptr,
+ struct die_info *parent)
{
- if (die->type)
+ struct die_info *die;
+ gdb_byte *cur_ptr;
+ int has_children;
+
+ cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
+ if (die == NULL)
{
- return die->type;
+ *new_info_ptr = cur_ptr;
+ return NULL;
}
+ store_in_ref_table (die, reader->cu);
+
+ if (has_children)
+ die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
else
{
- read_type_die (die, objfile, cu_header);
- if (!die->type)
- {
- dump_die (die);
- error ("Dwarf Error: Cannot find type of die.");
- }
- return die->type;
+ die->child = NULL;
+ *new_info_ptr = cur_ptr;
}
-}
-static void
-read_type_die (struct die_info *die, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
-{
- switch (die->tag)
- {
- case DW_TAG_class_type:
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- read_structure_scope (die, objfile, cu_header);
- break;
- case DW_TAG_enumeration_type:
- read_enumeration (die, objfile, cu_header);
- break;
- case DW_TAG_subprogram:
- case DW_TAG_subroutine_type:
- read_subroutine_type (die, objfile, cu_header);
- break;
- case DW_TAG_array_type:
- read_array_type (die, objfile, cu_header);
- break;
- case DW_TAG_pointer_type:
- read_tag_pointer_type (die, objfile, cu_header);
- break;
- case DW_TAG_ptr_to_member_type:
- read_tag_ptr_to_member_type (die, objfile, cu_header);
- break;
- case DW_TAG_reference_type:
- read_tag_reference_type (die, objfile, cu_header);
- break;
- case DW_TAG_const_type:
- read_tag_const_type (die, objfile, cu_header);
- break;
- case DW_TAG_volatile_type:
- read_tag_volatile_type (die, objfile, cu_header);
- break;
- case DW_TAG_string_type:
- read_tag_string_type (die, objfile);
- break;
- case DW_TAG_typedef:
- read_typedef (die, objfile, cu_header);
- break;
- case DW_TAG_base_type:
- read_base_type (die, objfile);
- break;
- default:
- complain (&dwarf2_unexpected_tag, dwarf_tag_name (die->tag));
- break;
- }
+ die->sibling = NULL;
+ die->parent = parent;
+ return die;
}
-static struct type *
-dwarf_base_type (int encoding, int size, struct objfile *objfile)
+/* Read a die, all of its descendents, and all of its siblings; set
+ all of the fields of all of the dies correctly. Arguments are as
+ in read_die_and_children. */
+
+static struct die_info *
+read_die_and_siblings (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ gdb_byte **new_info_ptr,
+ struct die_info *parent)
{
- /* FIXME - this should not produce a new (struct type *)
- every time. It should cache base types. */
- struct type *type;
- switch (encoding)
+ struct die_info *first_die, *last_sibling;
+ gdb_byte *cur_ptr;
+
+ cur_ptr = info_ptr;
+ first_die = last_sibling = NULL;
+
+ while (1)
{
- case DW_ATE_address:
- type = dwarf2_fundamental_type (objfile, FT_VOID);
- return type;
- case DW_ATE_boolean:
- type = dwarf2_fundamental_type (objfile, FT_BOOLEAN);
- return type;
- case DW_ATE_complex_float:
- if (size == 16)
- {
- type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX);
- }
- else
- {
- type = dwarf2_fundamental_type (objfile, FT_COMPLEX);
- }
- return type;
- case DW_ATE_float:
- if (size == 8)
+ struct die_info *die
+ = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
+
+ if (die == NULL)
{
- type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
+ *new_info_ptr = cur_ptr;
+ return first_die;
}
+
+ if (!first_die)
+ first_die = die;
else
- {
- type = dwarf2_fundamental_type (objfile, FT_FLOAT);
- }
- return type;
- case DW_ATE_signed:
- switch (size)
- {
- case 1:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
- break;
- case 2:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT);
- break;
- default:
- case 4:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
- break;
- }
- return type;
- case DW_ATE_signed_char:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
- return type;
- case DW_ATE_unsigned:
- switch (size)
- {
- case 1:
- type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
- break;
- case 2:
- type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT);
- break;
- default:
- case 4:
- type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER);
- break;
- }
- return type;
- case DW_ATE_unsigned_char:
- type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
- return type;
- default:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
- return type;
+ last_sibling->sibling = die;
+
+ last_sibling = die;
}
}
-#if 0
-struct die_info *
-copy_die (struct die_info *old_die)
+/* Read the die from the .debug_info section buffer. Set DIEP to
+ point to a newly allocated die with its information, except for its
+ child, sibling, and parent fields. Set HAS_CHILDREN to tell
+ whether the die has children or not. */
+
+static gdb_byte *
+read_full_die (const struct die_reader_specs *reader,
+ struct die_info **diep, gdb_byte *info_ptr,
+ int *has_children)
{
- struct die_info *new_die;
- int i, num_attrs;
+ unsigned int abbrev_number, bytes_read, i, offset;
+ struct abbrev_info *abbrev;
+ struct die_info *die;
+ struct dwarf2_cu *cu = reader->cu;
+ bfd *abfd = reader->abfd;
- new_die = (struct die_info *) xmalloc (sizeof (struct die_info));
- memset (new_die, 0, sizeof (struct die_info));
+ offset = info_ptr - reader->buffer;
+ abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ if (!abbrev_number)
+ {
+ *diep = NULL;
+ *has_children = 0;
+ return info_ptr;
+ }
- new_die->tag = old_die->tag;
- new_die->has_children = old_die->has_children;
- new_die->abbrev = old_die->abbrev;
- new_die->offset = old_die->offset;
- new_die->type = NULL;
+ abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
+ if (!abbrev)
+ error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
+ abbrev_number,
+ bfd_get_filename (abfd));
- num_attrs = old_die->num_attrs;
- new_die->num_attrs = num_attrs;
- new_die->attrs = (struct attribute *)
- xmalloc (num_attrs * sizeof (struct attribute));
+ die = dwarf_alloc_die (cu, abbrev->num_attrs);
+ die->offset = offset;
+ die->tag = abbrev->tag;
+ die->abbrev = abbrev_number;
- for (i = 0; i < old_die->num_attrs; ++i)
- {
- new_die->attrs[i].name = old_die->attrs[i].name;
- new_die->attrs[i].form = old_die->attrs[i].form;
- new_die->attrs[i].u.addr = old_die->attrs[i].u.addr;
- }
+ die->num_attrs = abbrev->num_attrs;
+
+ for (i = 0; i < abbrev->num_attrs; ++i)
+ info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
+ abfd, info_ptr, cu);
- new_die->next = NULL;
- return new_die;
+ *diep = die;
+ *has_children = abbrev->has_children;
+ return info_ptr;
}
-#endif
-/* Return sibling of die, NULL if no sibling. */
+/* In DWARF version 2, the description of the debugging information is
+ stored in a separate .debug_abbrev section. Before we read any
+ dies from a section we read in all abbreviations and install them
+ in a hash table. This function also sets flags in CU describing
+ the data found in the abbrev table. */
-static struct die_info *
-sibling_die (struct die_info *die)
+static void
+dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
{
- int nesting_level = 0;
+ struct comp_unit_head *cu_header = &cu->header;
+ gdb_byte *abbrev_ptr;
+ struct abbrev_info *cur_abbrev;
+ unsigned int abbrev_number, bytes_read, abbrev_name;
+ unsigned int abbrev_form, hash_number;
+ struct attr_abbrev *cur_attrs;
+ unsigned int allocated_attrs;
+
+ /* Initialize dwarf2 abbrevs */
+ obstack_init (&cu->abbrev_obstack);
+ cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
+ (ABBREV_HASH_SIZE
+ * sizeof (struct abbrev_info *)));
+ memset (cu->dwarf2_abbrevs, 0,
+ ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
+
+ abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
+ abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
- if (!die->has_children)
- {
- if (die->next && (die->next->tag == 0))
- {
- return NULL;
- }
- else
- {
- return die->next;
- }
- }
- else
+ allocated_attrs = ATTR_ALLOC_CHUNK;
+ cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
+
+ /* loop until we reach an abbrev number of 0 */
+ while (abbrev_number)
{
- do
+ cur_abbrev = dwarf_alloc_abbrev (cu);
+
+ /* read in abbrev header */
+ cur_abbrev->number = abbrev_number;
+ cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
+ cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
+ abbrev_ptr += 1;
+
+ if (cur_abbrev->tag == DW_TAG_namespace)
+ cu->has_namespace_info = 1;
+
+ /* now read in declarations */
+ abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
+ abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
+ while (abbrev_name)
{
- if (die->has_children)
+ if (cur_abbrev->num_attrs == allocated_attrs)
{
- nesting_level++;
+ allocated_attrs += ATTR_ALLOC_CHUNK;
+ cur_attrs
+ = xrealloc (cur_attrs, (allocated_attrs
+ * sizeof (struct attr_abbrev)));
}
- if (die->tag == 0)
- {
- nesting_level--;
- }
- die = die->next;
- }
- while (nesting_level);
- if (die && (die->tag == 0))
- {
- return NULL;
- }
- else
- {
- return die;
+
+ /* Record whether this compilation unit might have
+ inter-compilation-unit references. If we don't know what form
+ this attribute will have, then it might potentially be a
+ DW_FORM_ref_addr, so we conservatively expect inter-CU
+ references. */
+
+ if (abbrev_form == DW_FORM_ref_addr
+ || abbrev_form == DW_FORM_indirect)
+ cu->has_form_ref_addr = 1;
+
+ cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
+ cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
+ abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
+ abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
}
+
+ cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
+ (cur_abbrev->num_attrs
+ * sizeof (struct attr_abbrev)));
+ memcpy (cur_abbrev->attrs, cur_attrs,
+ cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
+
+ hash_number = abbrev_number % ABBREV_HASH_SIZE;
+ cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
+ cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
+
+ /* Get next abbreviation.
+ Under Irix6 the abbreviations for a compilation unit are not
+ always properly terminated with an abbrev number of 0.
+ Exit loop if we encounter an abbreviation which we have
+ already read (which means we are about to read the abbreviations
+ for the next compile unit) or if the end of the abbreviation
+ table is reached. */
+ if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
+ >= dwarf2_per_objfile->abbrev.size)
+ break;
+ abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
+ if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
+ break;
}
+
+ xfree (cur_attrs);
}
-/* Get linkage name of a die, return NULL if not found. */
+/* Release the memory used by the abbrev table for a compilation unit. */
-static char *
-dwarf2_linkage_name (struct die_info *die)
+static void
+dwarf2_free_abbrev_table (void *ptr_to_cu)
{
- struct attribute *attr;
+ struct dwarf2_cu *cu = ptr_to_cu;
- attr = dwarf_attr (die, DW_AT_MIPS_linkage_name);
- if (attr && DW_STRING (attr))
- return DW_STRING (attr);
- attr = dwarf_attr (die, DW_AT_name);
- if (attr && DW_STRING (attr))
- return DW_STRING (attr);
+ obstack_free (&cu->abbrev_obstack, NULL);
+ cu->dwarf2_abbrevs = NULL;
+}
+
+/* Lookup an abbrev_info structure in the abbrev hash table. */
+
+static struct abbrev_info *
+dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
+{
+ unsigned int hash_number;
+ struct abbrev_info *abbrev;
+
+ hash_number = number % ABBREV_HASH_SIZE;
+ abbrev = cu->dwarf2_abbrevs[hash_number];
+
+ while (abbrev)
+ {
+ if (abbrev->number == number)
+ return abbrev;
+ else
+ abbrev = abbrev->next;
+ }
return NULL;
}
-/* Convert a DIE tag into its string name. */
+/* Returns nonzero if TAG represents a type that we might generate a partial
+ symbol for. */
-static char *
-dwarf_tag_name (register unsigned tag)
+static int
+is_type_tag_for_partial (int tag)
{
switch (tag)
{
- case DW_TAG_padding:
- return "DW_TAG_padding";
+#if 0
+ /* Some types that would be reasonable to generate partial symbols for,
+ that we don't at present. */
case DW_TAG_array_type:
- return "DW_TAG_array_type";
+ case DW_TAG_file_type:
+ case DW_TAG_ptr_to_member_type:
+ case DW_TAG_set_type:
+ case DW_TAG_string_type:
+ case DW_TAG_subroutine_type:
+#endif
+ case DW_TAG_base_type:
case DW_TAG_class_type:
- return "DW_TAG_class_type";
- case DW_TAG_entry_point:
- return "DW_TAG_entry_point";
+ case DW_TAG_interface_type:
case DW_TAG_enumeration_type:
- return "DW_TAG_enumeration_type";
- case DW_TAG_formal_parameter:
- return "DW_TAG_formal_parameter";
- case DW_TAG_imported_declaration:
- return "DW_TAG_imported_declaration";
- case DW_TAG_label:
- return "DW_TAG_label";
- case DW_TAG_lexical_block:
- return "DW_TAG_lexical_block";
- case DW_TAG_member:
- return "DW_TAG_member";
- case DW_TAG_pointer_type:
- return "DW_TAG_pointer_type";
- case DW_TAG_reference_type:
- return "DW_TAG_reference_type";
- case DW_TAG_compile_unit:
- return "DW_TAG_compile_unit";
- case DW_TAG_string_type:
- return "DW_TAG_string_type";
case DW_TAG_structure_type:
- return "DW_TAG_structure_type";
- case DW_TAG_subroutine_type:
- return "DW_TAG_subroutine_type";
+ case DW_TAG_subrange_type:
case DW_TAG_typedef:
- return "DW_TAG_typedef";
case DW_TAG_union_type:
- return "DW_TAG_union_type";
- case DW_TAG_unspecified_parameters:
- return "DW_TAG_unspecified_parameters";
- case DW_TAG_variant:
- return "DW_TAG_variant";
- case DW_TAG_common_block:
- return "DW_TAG_common_block";
- case DW_TAG_common_inclusion:
- return "DW_TAG_common_inclusion";
- case DW_TAG_inheritance:
- return "DW_TAG_inheritance";
- case DW_TAG_inlined_subroutine:
- return "DW_TAG_inlined_subroutine";
- case DW_TAG_module:
- return "DW_TAG_module";
- case DW_TAG_ptr_to_member_type:
- return "DW_TAG_ptr_to_member_type";
- case DW_TAG_set_type:
- return "DW_TAG_set_type";
- case DW_TAG_subrange_type:
- return "DW_TAG_subrange_type";
- case DW_TAG_with_stmt:
- return "DW_TAG_with_stmt";
- case DW_TAG_access_declaration:
- return "DW_TAG_access_declaration";
- case DW_TAG_base_type:
- return "DW_TAG_base_type";
- case DW_TAG_catch_block:
- return "DW_TAG_catch_block";
- case DW_TAG_const_type:
- return "DW_TAG_const_type";
- case DW_TAG_constant:
- return "DW_TAG_constant";
- case DW_TAG_enumerator:
- return "DW_TAG_enumerator";
- case DW_TAG_file_type:
- return "DW_TAG_file_type";
- case DW_TAG_friend:
- return "DW_TAG_friend";
- case DW_TAG_namelist:
- return "DW_TAG_namelist";
- case DW_TAG_namelist_item:
- return "DW_TAG_namelist_item";
- case DW_TAG_packed_type:
- return "DW_TAG_packed_type";
- case DW_TAG_subprogram:
- return "DW_TAG_subprogram";
- case DW_TAG_template_type_param:
- return "DW_TAG_template_type_param";
- case DW_TAG_template_value_param:
- return "DW_TAG_template_value_param";
- case DW_TAG_thrown_type:
- return "DW_TAG_thrown_type";
- case DW_TAG_try_block:
- return "DW_TAG_try_block";
- case DW_TAG_variant_part:
- return "DW_TAG_variant_part";
- case DW_TAG_variable:
- return "DW_TAG_variable";
- case DW_TAG_volatile_type:
- return "DW_TAG_volatile_type";
- case DW_TAG_MIPS_loop:
- return "DW_TAG_MIPS_loop";
- case DW_TAG_format_label:
- return "DW_TAG_format_label";
- case DW_TAG_function_template:
- return "DW_TAG_function_template";
- case DW_TAG_class_template:
- return "DW_TAG_class_template";
+ return 1;
default:
- return "DW_TAG_<unknown>";
+ return 0;
}
}
-/* Convert a DWARF attribute code into its string name. */
+/* Load all DIEs that are interesting for partial symbols into memory. */
-static char *
-dwarf_attr_name (register unsigned attr)
+static struct partial_die_info *
+load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
+ int building_psymtab, struct dwarf2_cu *cu)
{
- switch (attr)
+ struct partial_die_info *part_die;
+ struct partial_die_info *parent_die, *last_die, *first_die = NULL;
+ struct abbrev_info *abbrev;
+ unsigned int bytes_read;
+ unsigned int load_all = 0;
+
+ int nesting_level = 1;
+
+ parent_die = NULL;
+ last_die = NULL;
+
+ if (cu->per_cu && cu->per_cu->load_all_dies)
+ load_all = 1;
+
+ cu->partial_dies
+ = htab_create_alloc_ex (cu->header.length / 12,
+ partial_die_hash,
+ partial_die_eq,
+ NULL,
+ &cu->comp_unit_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
+
+ part_die = obstack_alloc (&cu->comp_unit_obstack,
+ sizeof (struct partial_die_info));
+
+ while (1)
{
- case DW_AT_sibling:
- return "DW_AT_sibling";
- case DW_AT_location:
- return "DW_AT_location";
- case DW_AT_name:
- return "DW_AT_name";
- case DW_AT_ordering:
- return "DW_AT_ordering";
- case DW_AT_subscr_data:
- return "DW_AT_subscr_data";
- case DW_AT_byte_size:
- return "DW_AT_byte_size";
- case DW_AT_bit_offset:
- return "DW_AT_bit_offset";
- case DW_AT_bit_size:
- return "DW_AT_bit_size";
- case DW_AT_element_list:
- return "DW_AT_element_list";
- case DW_AT_stmt_list:
- return "DW_AT_stmt_list";
- case DW_AT_low_pc:
- return "DW_AT_low_pc";
- case DW_AT_high_pc:
- return "DW_AT_high_pc";
- case DW_AT_language:
- return "DW_AT_language";
- case DW_AT_member:
- return "DW_AT_member";
- case DW_AT_discr:
- return "DW_AT_discr";
- case DW_AT_discr_value:
- return "DW_AT_discr_value";
- case DW_AT_visibility:
- return "DW_AT_visibility";
- case DW_AT_import:
- return "DW_AT_import";
- case DW_AT_string_length:
- return "DW_AT_string_length";
- case DW_AT_common_reference:
- return "DW_AT_common_reference";
- case DW_AT_comp_dir:
- return "DW_AT_comp_dir";
- case DW_AT_const_value:
- return "DW_AT_const_value";
- case DW_AT_containing_type:
- return "DW_AT_containing_type";
- case DW_AT_default_value:
- return "DW_AT_default_value";
- case DW_AT_inline:
- return "DW_AT_inline";
- case DW_AT_is_optional:
- return "DW_AT_is_optional";
- case DW_AT_lower_bound:
- return "DW_AT_lower_bound";
- case DW_AT_producer:
- return "DW_AT_producer";
- case DW_AT_prototyped:
- return "DW_AT_prototyped";
- case DW_AT_return_addr:
- return "DW_AT_return_addr";
- case DW_AT_start_scope:
- return "DW_AT_start_scope";
- case DW_AT_stride_size:
- return "DW_AT_stride_size";
- case DW_AT_upper_bound:
- return "DW_AT_upper_bound";
- case DW_AT_abstract_origin:
- return "DW_AT_abstract_origin";
- case DW_AT_accessibility:
- return "DW_AT_accessibility";
- case DW_AT_address_class:
- return "DW_AT_address_class";
- case DW_AT_artificial:
- return "DW_AT_artificial";
- case DW_AT_base_types:
- return "DW_AT_base_types";
- case DW_AT_calling_convention:
- return "DW_AT_calling_convention";
- case DW_AT_count:
- return "DW_AT_count";
- case DW_AT_data_member_location:
- return "DW_AT_data_member_location";
- case DW_AT_decl_column:
- return "DW_AT_decl_column";
- case DW_AT_decl_file:
- return "DW_AT_decl_file";
- case DW_AT_decl_line:
- return "DW_AT_decl_line";
- case DW_AT_declaration:
- return "DW_AT_declaration";
- case DW_AT_discr_list:
- return "DW_AT_discr_list";
- case DW_AT_encoding:
- return "DW_AT_encoding";
- case DW_AT_external:
- return "DW_AT_external";
- case DW_AT_frame_base:
- return "DW_AT_frame_base";
- case DW_AT_friend:
- return "DW_AT_friend";
- case DW_AT_identifier_case:
- return "DW_AT_identifier_case";
- case DW_AT_macro_info:
- return "DW_AT_macro_info";
- case DW_AT_namelist_items:
- return "DW_AT_namelist_items";
- case DW_AT_priority:
- return "DW_AT_priority";
- case DW_AT_segment:
- return "DW_AT_segment";
- case DW_AT_specification:
- return "DW_AT_specification";
- case DW_AT_static_link:
- return "DW_AT_static_link";
- case DW_AT_type:
- return "DW_AT_type";
- case DW_AT_use_location:
- return "DW_AT_use_location";
- case DW_AT_variable_parameter:
- return "DW_AT_variable_parameter";
- case DW_AT_virtuality:
- return "DW_AT_virtuality";
- case DW_AT_vtable_elem_location:
- return "DW_AT_vtable_elem_location";
+ abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
-#ifdef MIPS
- case DW_AT_MIPS_fde:
- return "DW_AT_MIPS_fde";
- case DW_AT_MIPS_loop_begin:
- return "DW_AT_MIPS_loop_begin";
- case DW_AT_MIPS_tail_loop_begin:
- return "DW_AT_MIPS_tail_loop_begin";
- case DW_AT_MIPS_epilog_begin:
- return "DW_AT_MIPS_epilog_begin";
- case DW_AT_MIPS_loop_unroll_factor:
- return "DW_AT_MIPS_loop_unroll_factor";
- case DW_AT_MIPS_software_pipeline_depth:
- return "DW_AT_MIPS_software_pipeline_depth";
- case DW_AT_MIPS_linkage_name:
- return "DW_AT_MIPS_linkage_name";
-#endif
+ /* A NULL abbrev means the end of a series of children. */
+ if (abbrev == NULL)
+ {
+ if (--nesting_level == 0)
+ {
+ /* PART_DIE was probably the last thing allocated on the
+ comp_unit_obstack, so we could call obstack_free
+ here. We don't do that because the waste is small,
+ and will be cleaned up when we're done with this
+ compilation unit. This way, we're also more robust
+ against other users of the comp_unit_obstack. */
+ return first_die;
+ }
+ info_ptr += bytes_read;
+ last_die = parent_die;
+ parent_die = parent_die->die_parent;
+ continue;
+ }
- case DW_AT_sf_names:
- return "DW_AT_sf_names";
- case DW_AT_src_info:
- return "DW_AT_src_info";
- case DW_AT_mac_info:
- return "DW_AT_mac_info";
- case DW_AT_src_coords:
- return "DW_AT_src_coords";
- case DW_AT_body_begin:
- return "DW_AT_body_begin";
- case DW_AT_body_end:
- return "DW_AT_body_end";
- default:
- return "DW_AT_<unknown>";
+ /* Check whether this DIE is interesting enough to save. Normally
+ we would not be interested in members here, but there may be
+ later variables referencing them via DW_AT_specification (for
+ static members). */
+ if (!load_all
+ && !is_type_tag_for_partial (abbrev->tag)
+ && abbrev->tag != DW_TAG_enumerator
+ && abbrev->tag != DW_TAG_subprogram
+ && abbrev->tag != DW_TAG_lexical_block
+ && abbrev->tag != DW_TAG_variable
+ && abbrev->tag != DW_TAG_namespace
+ && abbrev->tag != DW_TAG_member)
+ {
+ /* Otherwise we skip to the next sibling, if any. */
+ info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
+ continue;
+ }
+
+ info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
+ buffer, info_ptr, cu);
+
+ /* This two-pass algorithm for processing partial symbols has a
+ high cost in cache pressure. Thus, handle some simple cases
+ here which cover the majority of C partial symbols. DIEs
+ which neither have specification tags in them, nor could have
+ specification tags elsewhere pointing at them, can simply be
+ processed and discarded.
+
+ This segment is also optional; scan_partial_symbols and
+ add_partial_symbol will handle these DIEs if we chain
+ them in normally. When compilers which do not emit large
+ quantities of duplicate debug information are more common,
+ this code can probably be removed. */
+
+ /* Any complete simple types at the top level (pretty much all
+ of them, for a language without namespaces), can be processed
+ directly. */
+ if (parent_die == NULL
+ && part_die->has_specification == 0
+ && part_die->is_declaration == 0
+ && (part_die->tag == DW_TAG_typedef
+ || part_die->tag == DW_TAG_base_type
+ || part_die->tag == DW_TAG_subrange_type))
+ {
+ if (building_psymtab && part_die->name != NULL)
+ add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
+ VAR_DOMAIN, LOC_TYPEDEF,
+ &cu->objfile->static_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, cu->objfile);
+ info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
+ continue;
+ }
+
+ /* If we're at the second level, and we're an enumerator, and
+ our parent has no specification (meaning possibly lives in a
+ namespace elsewhere), then we can add the partial symbol now
+ instead of queueing it. */
+ if (part_die->tag == DW_TAG_enumerator
+ && parent_die != NULL
+ && parent_die->die_parent == NULL
+ && parent_die->tag == DW_TAG_enumeration_type
+ && parent_die->has_specification == 0)
+ {
+ if (part_die->name == NULL)
+ complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
+ else if (building_psymtab)
+ add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
+ VAR_DOMAIN, LOC_CONST,
+ (cu->language == language_cplus
+ || cu->language == language_java)
+ ? &cu->objfile->global_psymbols
+ : &cu->objfile->static_psymbols,
+ 0, (CORE_ADDR) 0, cu->language, cu->objfile);
+
+ info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
+ continue;
+ }
+
+ /* We'll save this DIE so link it in. */
+ part_die->die_parent = parent_die;
+ part_die->die_sibling = NULL;
+ part_die->die_child = NULL;
+
+ if (last_die && last_die == parent_die)
+ last_die->die_child = part_die;
+ else if (last_die)
+ last_die->die_sibling = part_die;
+
+ last_die = part_die;
+
+ if (first_die == NULL)
+ first_die = part_die;
+
+ /* Maybe add the DIE to the hash table. Not all DIEs that we
+ find interesting need to be in the hash table, because we
+ also have the parent/sibling/child chains; only those that we
+ might refer to by offset later during partial symbol reading.
+
+ For now this means things that might have be the target of a
+ DW_AT_specification, DW_AT_abstract_origin, or
+ DW_AT_extension. DW_AT_extension will refer only to
+ namespaces; DW_AT_abstract_origin refers to functions (and
+ many things under the function DIE, but we do not recurse
+ into function DIEs during partial symbol reading) and
+ possibly variables as well; DW_AT_specification refers to
+ declarations. Declarations ought to have the DW_AT_declaration
+ flag. It happens that GCC forgets to put it in sometimes, but
+ only for functions, not for types.
+
+ Adding more things than necessary to the hash table is harmless
+ except for the performance cost. Adding too few will result in
+ wasted time in find_partial_die, when we reread the compilation
+ unit with load_all_dies set. */
+
+ if (load_all
+ || abbrev->tag == DW_TAG_subprogram
+ || abbrev->tag == DW_TAG_variable
+ || abbrev->tag == DW_TAG_namespace
+ || part_die->is_declaration)
+ {
+ void **slot;
+
+ slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
+ part_die->offset, INSERT);
+ *slot = part_die;
+ }
+
+ part_die = obstack_alloc (&cu->comp_unit_obstack,
+ sizeof (struct partial_die_info));
+
+ /* For some DIEs we want to follow their children (if any). For C
+ we have no reason to follow the children of structures; for other
+ languages we have to, both so that we can get at method physnames
+ to infer fully qualified class names, and for DW_AT_specification.
+
+ For Ada, we need to scan the children of subprograms and lexical
+ blocks as well because Ada allows the definition of nested
+ entities that could be interesting for the debugger, such as
+ nested subprograms for instance. */
+ if (last_die->has_children
+ && (load_all
+ || last_die->tag == DW_TAG_namespace
+ || last_die->tag == DW_TAG_enumeration_type
+ || (cu->language != language_c
+ && (last_die->tag == DW_TAG_class_type
+ || last_die->tag == DW_TAG_interface_type
+ || last_die->tag == DW_TAG_structure_type
+ || last_die->tag == DW_TAG_union_type))
+ || (cu->language == language_ada
+ && (last_die->tag == DW_TAG_subprogram
+ || last_die->tag == DW_TAG_lexical_block))))
+ {
+ nesting_level++;
+ parent_die = last_die;
+ continue;
+ }
+
+ /* Otherwise we skip to the next sibling, if any. */
+ info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
+
+ /* Back to the top, do it again. */
}
}
-/* Convert a DWARF value form code into its string name. */
+/* Read a minimal amount of information into the minimal die structure. */
-static char *
-dwarf_form_name (register unsigned form)
+static gdb_byte *
+read_partial_die (struct partial_die_info *part_die,
+ struct abbrev_info *abbrev,
+ unsigned int abbrev_len, bfd *abfd,
+ gdb_byte *buffer, gdb_byte *info_ptr,
+ struct dwarf2_cu *cu)
{
- switch (form)
- {
- case DW_FORM_addr:
- return "DW_FORM_addr";
- case DW_FORM_block2:
- return "DW_FORM_block2";
- case DW_FORM_block4:
- return "DW_FORM_block4";
- case DW_FORM_data2:
- return "DW_FORM_data2";
- case DW_FORM_data4:
- return "DW_FORM_data4";
- case DW_FORM_data8:
- return "DW_FORM_data8";
+ unsigned int bytes_read, i;
+ struct attribute attr;
+ int has_low_pc_attr = 0;
+ int has_high_pc_attr = 0;
+
+ memset (part_die, 0, sizeof (struct partial_die_info));
+
+ part_die->offset = info_ptr - buffer;
+
+ info_ptr += abbrev_len;
+
+ if (abbrev == NULL)
+ return info_ptr;
+
+ part_die->tag = abbrev->tag;
+ part_die->has_children = abbrev->has_children;
+
+ for (i = 0; i < abbrev->num_attrs; ++i)
+ {
+ info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
+
+ /* Store the data if it is of an attribute we want to keep in a
+ partial symbol table. */
+ switch (attr.name)
+ {
+ case DW_AT_name:
+ switch (part_die->tag)
+ {
+ case DW_TAG_compile_unit:
+ case DW_TAG_type_unit:
+ /* Compilation units have a DW_AT_name that is a filename, not
+ a source language identifier. */
+ case DW_TAG_enumeration_type:
+ case DW_TAG_enumerator:
+ /* These tags always have simple identifiers already; no need
+ to canonicalize them. */
+ part_die->name = DW_STRING (&attr);
+ break;
+ default:
+ part_die->name
+ = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
+ &cu->comp_unit_obstack);
+ break;
+ }
+ break;
+ case DW_AT_MIPS_linkage_name:
+ part_die->name = DW_STRING (&attr);
+ break;
+ case DW_AT_low_pc:
+ has_low_pc_attr = 1;
+ part_die->lowpc = DW_ADDR (&attr);
+ break;
+ case DW_AT_high_pc:
+ has_high_pc_attr = 1;
+ part_die->highpc = DW_ADDR (&attr);
+ break;
+ case DW_AT_location:
+ /* Support the .debug_loc offsets */
+ if (attr_form_is_block (&attr))
+ {
+ part_die->locdesc = DW_BLOCK (&attr);
+ }
+ else if (attr_form_is_section_offset (&attr))
+ {
+ dwarf2_complex_location_expr_complaint ();
+ }
+ else
+ {
+ dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
+ "partial symbol information");
+ }
+ break;
+ case DW_AT_external:
+ part_die->is_external = DW_UNSND (&attr);
+ break;
+ case DW_AT_declaration:
+ part_die->is_declaration = DW_UNSND (&attr);
+ break;
+ case DW_AT_type:
+ part_die->has_type = 1;
+ break;
+ case DW_AT_abstract_origin:
+ case DW_AT_specification:
+ case DW_AT_extension:
+ part_die->has_specification = 1;
+ part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
+ break;
+ case DW_AT_sibling:
+ /* Ignore absolute siblings, they might point outside of
+ the current compile unit. */
+ if (attr.form == DW_FORM_ref_addr)
+ complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
+ else
+ part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
+ break;
+ case DW_AT_byte_size:
+ part_die->has_byte_size = 1;
+ break;
+ case DW_AT_calling_convention:
+ /* DWARF doesn't provide a way to identify a program's source-level
+ entry point. DW_AT_calling_convention attributes are only meant
+ to describe functions' calling conventions.
+
+ However, because it's a necessary piece of information in
+ Fortran, and because DW_CC_program is the only piece of debugging
+ information whose definition refers to a 'main program' at all,
+ several compilers have begun marking Fortran main programs with
+ DW_CC_program --- even when those functions use the standard
+ calling conventions.
+
+ So until DWARF specifies a way to provide this information and
+ compilers pick up the new representation, we'll support this
+ practice. */
+ if (DW_UNSND (&attr) == DW_CC_program
+ && cu->language == language_fortran)
+ set_main_name (part_die->name);
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* When using the GNU linker, .gnu.linkonce. sections are used to
+ eliminate duplicate copies of functions and vtables and such.
+ The linker will arbitrarily choose one and discard the others.
+ The AT_*_pc values for such functions refer to local labels in
+ these sections. If the section from that file was discarded, the
+ labels are not in the output, so the relocs get a value of 0.
+ If this is a discarded function, mark the pc bounds as invalid,
+ so that GDB will ignore it. */
+ if (has_low_pc_attr && has_high_pc_attr
+ && part_die->lowpc < part_die->highpc
+ && (part_die->lowpc != 0
+ || dwarf2_per_objfile->has_section_at_zero))
+ part_die->has_pc_info = 1;
+
+ return info_ptr;
+}
+
+/* Find a cached partial DIE at OFFSET in CU. */
+
+static struct partial_die_info *
+find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
+{
+ struct partial_die_info *lookup_die = NULL;
+ struct partial_die_info part_die;
+
+ part_die.offset = offset;
+ lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
+
+ return lookup_die;
+}
+
+/* Find a partial DIE at OFFSET, which may or may not be in CU,
+ except in the case of .debug_types DIEs which do not reference
+ outside their CU (they do however referencing other types via
+ DW_FORM_sig8). */
+
+static struct partial_die_info *
+find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
+{
+ struct dwarf2_per_cu_data *per_cu = NULL;
+ struct partial_die_info *pd = NULL;
+
+ if (cu->per_cu->from_debug_types)
+ {
+ pd = find_partial_die_in_comp_unit (offset, cu);
+ if (pd != NULL)
+ return pd;
+ goto not_found;
+ }
+
+ if (offset_in_cu_p (&cu->header, offset))
+ {
+ pd = find_partial_die_in_comp_unit (offset, cu);
+ if (pd != NULL)
+ return pd;
+ }
+
+ per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
+
+ if (per_cu->cu == NULL)
+ {
+ load_partial_comp_unit (per_cu, cu->objfile);
+ per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
+ dwarf2_per_objfile->read_in_chain = per_cu;
+ }
+
+ per_cu->cu->last_used = 0;
+ pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
+
+ if (pd == NULL && per_cu->load_all_dies == 0)
+ {
+ struct cleanup *back_to;
+ struct partial_die_info comp_unit_die;
+ struct abbrev_info *abbrev;
+ unsigned int bytes_read;
+ char *info_ptr;
+
+ per_cu->load_all_dies = 1;
+
+ /* Re-read the DIEs. */
+ back_to = make_cleanup (null_cleanup, 0);
+ if (per_cu->cu->dwarf2_abbrevs == NULL)
+ {
+ dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
+ make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
+ }
+ info_ptr = (dwarf2_per_objfile->info.buffer
+ + per_cu->cu->header.offset
+ + per_cu->cu->header.first_die_offset);
+ abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
+ info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
+ per_cu->cu->objfile->obfd,
+ dwarf2_per_objfile->info.buffer, info_ptr,
+ per_cu->cu);
+ if (comp_unit_die.has_children)
+ load_partial_dies (per_cu->cu->objfile->obfd,
+ dwarf2_per_objfile->info.buffer, info_ptr,
+ 0, per_cu->cu);
+ do_cleanups (back_to);
+
+ pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
+ }
+
+ not_found:
+
+ if (pd == NULL)
+ internal_error (__FILE__, __LINE__,
+ _("could not find partial DIE 0x%x in cache [from module %s]\n"),
+ offset, bfd_get_filename (cu->objfile->obfd));
+ return pd;
+}
+
+/* Adjust PART_DIE before generating a symbol for it. This function
+ may set the is_external flag or change the DIE's name. */
+
+static void
+fixup_partial_die (struct partial_die_info *part_die,
+ struct dwarf2_cu *cu)
+{
+ /* If we found a reference attribute and the DIE has no name, try
+ to find a name in the referred to DIE. */
+
+ if (part_die->name == NULL && part_die->has_specification)
+ {
+ struct partial_die_info *spec_die;
+
+ spec_die = find_partial_die (part_die->spec_offset, cu);
+
+ fixup_partial_die (spec_die, cu);
+
+ if (spec_die->name)
+ {
+ part_die->name = spec_die->name;
+
+ /* Copy DW_AT_external attribute if it is set. */
+ if (spec_die->is_external)
+ part_die->is_external = spec_die->is_external;
+ }
+ }
+
+ /* Set default names for some unnamed DIEs. */
+ if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
+ || part_die->tag == DW_TAG_class_type))
+ part_die->name = "(anonymous class)";
+
+ if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
+ part_die->name = "(anonymous namespace)";
+
+ if (part_die->tag == DW_TAG_structure_type
+ || part_die->tag == DW_TAG_class_type
+ || part_die->tag == DW_TAG_union_type)
+ guess_structure_name (part_die, cu);
+}
+
+/* Read an attribute value described by an attribute form. */
+
+static gdb_byte *
+read_attribute_value (struct attribute *attr, unsigned form,
+ bfd *abfd, gdb_byte *info_ptr,
+ struct dwarf2_cu *cu)
+{
+ struct comp_unit_head *cu_header = &cu->header;
+ unsigned int bytes_read;
+ struct dwarf_block *blk;
+
+ attr->form = form;
+ switch (form)
+ {
+ case DW_FORM_addr:
+ case DW_FORM_ref_addr:
+ DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_block2:
+ blk = dwarf_alloc_block (cu);
+ blk->size = read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ info_ptr += blk->size;
+ DW_BLOCK (attr) = blk;
+ break;
+ case DW_FORM_block4:
+ blk = dwarf_alloc_block (cu);
+ blk->size = read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ info_ptr += blk->size;
+ DW_BLOCK (attr) = blk;
+ break;
+ case DW_FORM_data2:
+ DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ break;
+ case DW_FORM_data4:
+ DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ break;
+ case DW_FORM_data8:
+ DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
+ info_ptr += 8;
+ break;
case DW_FORM_string:
- return "DW_FORM_string";
+ DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
+ DW_STRING_IS_CANONICAL (attr) = 0;
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_strp:
+ DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
+ &bytes_read);
+ DW_STRING_IS_CANONICAL (attr) = 0;
+ info_ptr += bytes_read;
+ break;
case DW_FORM_block:
- return "DW_FORM_block";
+ blk = dwarf_alloc_block (cu);
+ blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ info_ptr += blk->size;
+ DW_BLOCK (attr) = blk;
+ break;
case DW_FORM_block1:
- return "DW_FORM_block1";
+ blk = dwarf_alloc_block (cu);
+ blk->size = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ info_ptr += blk->size;
+ DW_BLOCK (attr) = blk;
+ break;
case DW_FORM_data1:
- return "DW_FORM_data1";
+ DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ break;
case DW_FORM_flag:
- return "DW_FORM_flag";
+ DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ break;
case DW_FORM_sdata:
- return "DW_FORM_sdata";
- case DW_FORM_strp:
- return "DW_FORM_strp";
+ DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
case DW_FORM_udata:
- return "DW_FORM_udata";
- case DW_FORM_ref_addr:
- return "DW_FORM_ref_addr";
+ DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
case DW_FORM_ref1:
- return "DW_FORM_ref1";
+ DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ break;
case DW_FORM_ref2:
- return "DW_FORM_ref2";
+ DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ break;
case DW_FORM_ref4:
- return "DW_FORM_ref4";
+ DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ break;
case DW_FORM_ref8:
- return "DW_FORM_ref8";
+ DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
+ info_ptr += 8;
+ break;
+ case DW_FORM_sig8:
+ /* Convert the signature to something we can record in DW_UNSND
+ for later lookup.
+ NOTE: This is NULL if the type wasn't found. */
+ DW_SIGNATURED_TYPE (attr) =
+ lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
+ info_ptr += 8;
+ break;
case DW_FORM_ref_udata:
- return "DW_FORM_ref_udata";
+ DW_ADDR (attr) = (cu->header.offset
+ + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
+ info_ptr += bytes_read;
+ break;
case DW_FORM_indirect:
- return "DW_FORM_indirect";
+ form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
+ break;
default:
- return "DW_FORM_<unknown>";
+ error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
+ dwarf_form_name (form),
+ bfd_get_filename (abfd));
}
+
+ /* We have seen instances where the compiler tried to emit a byte
+ size attribute of -1 which ended up being encoded as an unsigned
+ 0xffffffff. Although 0xffffffff is technically a valid size value,
+ an object of this size seems pretty unlikely so we can relatively
+ safely treat these cases as if the size attribute was invalid and
+ treat them as zero by default. */
+ if (attr->name == DW_AT_byte_size
+ && form == DW_FORM_data4
+ && DW_UNSND (attr) >= 0xffffffff)
+ {
+ complaint
+ (&symfile_complaints,
+ _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
+ hex_string (DW_UNSND (attr)));
+ DW_UNSND (attr) = 0;
+ }
+
+ return info_ptr;
}
-/* Convert a DWARF stack opcode into its string name. */
+/* Read an attribute described by an abbreviated attribute. */
-static char *
-dwarf_stack_op_name (register unsigned op)
+static gdb_byte *
+read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
+ bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
{
- switch (op)
- {
- case DW_OP_addr:
- return "DW_OP_addr";
- case DW_OP_deref:
- return "DW_OP_deref";
- case DW_OP_const1u:
+ attr->name = abbrev->name;
+ return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
+}
+
+/* read dwarf information from a buffer */
+
+static unsigned int
+read_1_byte (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_8 (abfd, buf);
+}
+
+static int
+read_1_signed_byte (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_signed_8 (abfd, buf);
+}
+
+static unsigned int
+read_2_bytes (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_16 (abfd, buf);
+}
+
+static int
+read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_signed_16 (abfd, buf);
+}
+
+static unsigned int
+read_4_bytes (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_32 (abfd, buf);
+}
+
+static int
+read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_signed_32 (abfd, buf);
+}
+
+static ULONGEST
+read_8_bytes (bfd *abfd, gdb_byte *buf)
+{
+ return bfd_get_64 (abfd, buf);
+}
+
+static CORE_ADDR
+read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
+ unsigned int *bytes_read)
+{
+ struct comp_unit_head *cu_header = &cu->header;
+ CORE_ADDR retval = 0;
+
+ if (cu_header->signed_addr_p)
+ {
+ switch (cu_header->addr_size)
+ {
+ case 2:
+ retval = bfd_get_signed_16 (abfd, buf);
+ break;
+ case 4:
+ retval = bfd_get_signed_32 (abfd, buf);
+ break;
+ case 8:
+ retval = bfd_get_signed_64 (abfd, buf);
+ break;
+ default:
+ internal_error (__FILE__, __LINE__,
+ _("read_address: bad switch, signed [in module %s]"),
+ bfd_get_filename (abfd));
+ }
+ }
+ else
+ {
+ switch (cu_header->addr_size)
+ {
+ case 2:
+ retval = bfd_get_16 (abfd, buf);
+ break;
+ case 4:
+ retval = bfd_get_32 (abfd, buf);
+ break;
+ case 8:
+ retval = bfd_get_64 (abfd, buf);
+ break;
+ default:
+ internal_error (__FILE__, __LINE__,
+ _("read_address: bad switch, unsigned [in module %s]"),
+ bfd_get_filename (abfd));
+ }
+ }
+
+ *bytes_read = cu_header->addr_size;
+ return retval;
+}
+
+/* Read the initial length from a section. The (draft) DWARF 3
+ specification allows the initial length to take up either 4 bytes
+ or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
+ bytes describe the length and all offsets will be 8 bytes in length
+ instead of 4.
+
+ An older, non-standard 64-bit format is also handled by this
+ function. The older format in question stores the initial length
+ as an 8-byte quantity without an escape value. Lengths greater
+ than 2^32 aren't very common which means that the initial 4 bytes
+ is almost always zero. Since a length value of zero doesn't make
+ sense for the 32-bit format, this initial zero can be considered to
+ be an escape value which indicates the presence of the older 64-bit
+ format. As written, the code can't detect (old format) lengths
+ greater than 4GB. If it becomes necessary to handle lengths
+ somewhat larger than 4GB, we could allow other small values (such
+ as the non-sensical values of 1, 2, and 3) to also be used as
+ escape values indicating the presence of the old format.
+
+ The value returned via bytes_read should be used to increment the
+ relevant pointer after calling read_initial_length().
+
+ [ Note: read_initial_length() and read_offset() are based on the
+ document entitled "DWARF Debugging Information Format", revision
+ 3, draft 8, dated November 19, 2001. This document was obtained
+ from:
+
+ http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
+
+ This document is only a draft and is subject to change. (So beware.)
+
+ Details regarding the older, non-standard 64-bit format were
+ determined empirically by examining 64-bit ELF files produced by
+ the SGI toolchain on an IRIX 6.5 machine.
+
+ - Kevin, July 16, 2002
+ ] */
+
+static LONGEST
+read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
+{
+ LONGEST length = bfd_get_32 (abfd, buf);
+
+ if (length == 0xffffffff)
+ {
+ length = bfd_get_64 (abfd, buf + 4);
+ *bytes_read = 12;
+ }
+ else if (length == 0)
+ {
+ /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
+ length = bfd_get_64 (abfd, buf);
+ *bytes_read = 8;
+ }
+ else
+ {
+ *bytes_read = 4;
+ }
+
+ return length;
+}
+
+/* Cover function for read_initial_length.
+ Returns the length of the object at BUF, and stores the size of the
+ initial length in *BYTES_READ and stores the size that offsets will be in
+ *OFFSET_SIZE.
+ If the initial length size is not equivalent to that specified in
+ CU_HEADER then issue a complaint.
+ This is useful when reading non-comp-unit headers. */
+
+static LONGEST
+read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
+ const struct comp_unit_head *cu_header,
+ unsigned int *bytes_read,
+ unsigned int *offset_size)
+{
+ LONGEST length = read_initial_length (abfd, buf, bytes_read);
+
+ gdb_assert (cu_header->initial_length_size == 4
+ || cu_header->initial_length_size == 8
+ || cu_header->initial_length_size == 12);
+
+ if (cu_header->initial_length_size != *bytes_read)
+ complaint (&symfile_complaints,
+ _("intermixed 32-bit and 64-bit DWARF sections"));
+
+ *offset_size = (*bytes_read == 4) ? 4 : 8;
+ return length;
+}
+
+/* Read an offset from the data stream. The size of the offset is
+ given by cu_header->offset_size. */
+
+static LONGEST
+read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
+ unsigned int *bytes_read)
+{
+ LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
+ *bytes_read = cu_header->offset_size;
+ return offset;
+}
+
+/* Read an offset from the data stream. */
+
+static LONGEST
+read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
+{
+ LONGEST retval = 0;
+
+ switch (offset_size)
+ {
+ case 4:
+ retval = bfd_get_32 (abfd, buf);
+ break;
+ case 8:
+ retval = bfd_get_64 (abfd, buf);
+ break;
+ default:
+ internal_error (__FILE__, __LINE__,
+ _("read_offset_1: bad switch [in module %s]"),
+ bfd_get_filename (abfd));
+ }
+
+ return retval;
+}
+
+static gdb_byte *
+read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
+{
+ /* If the size of a host char is 8 bits, we can return a pointer
+ to the buffer, otherwise we have to copy the data to a buffer
+ allocated on the temporary obstack. */
+ gdb_assert (HOST_CHAR_BIT == 8);
+ return buf;
+}
+
+static char *
+read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
+{
+ /* If the size of a host char is 8 bits, we can return a pointer
+ to the string, otherwise we have to copy the string to a buffer
+ allocated on the temporary obstack. */
+ gdb_assert (HOST_CHAR_BIT == 8);
+ if (*buf == '\0')
+ {
+ *bytes_read_ptr = 1;
+ return NULL;
+ }
+ *bytes_read_ptr = strlen ((char *) buf) + 1;
+ return (char *) buf;
+}
+
+static char *
+read_indirect_string (bfd *abfd, gdb_byte *buf,
+ const struct comp_unit_head *cu_header,
+ unsigned int *bytes_read_ptr)
+{
+ LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
+
+ if (dwarf2_per_objfile->str.buffer == NULL)
+ {
+ error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
+ bfd_get_filename (abfd));
+ return NULL;
+ }
+ if (str_offset >= dwarf2_per_objfile->str.size)
+ {
+ error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
+ bfd_get_filename (abfd));
+ return NULL;
+ }
+ gdb_assert (HOST_CHAR_BIT == 8);
+ if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
+ return NULL;
+ return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
+}
+
+static unsigned long
+read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
+{
+ unsigned long result;
+ unsigned int num_read;
+ int i, shift;
+ unsigned char byte;
+
+ result = 0;
+ shift = 0;
+ num_read = 0;
+ i = 0;
+ while (1)
+ {
+ byte = bfd_get_8 (abfd, buf);
+ buf++;
+ num_read++;
+ result |= ((unsigned long)(byte & 127) << shift);
+ if ((byte & 128) == 0)
+ {
+ break;
+ }
+ shift += 7;
+ }
+ *bytes_read_ptr = num_read;
+ return result;
+}
+
+static long
+read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
+{
+ long result;
+ int i, shift, num_read;
+ unsigned char byte;
+
+ result = 0;
+ shift = 0;
+ num_read = 0;
+ i = 0;
+ while (1)
+ {
+ byte = bfd_get_8 (abfd, buf);
+ buf++;
+ num_read++;
+ result |= ((long)(byte & 127) << shift);
+ shift += 7;
+ if ((byte & 128) == 0)
+ {
+ break;
+ }
+ }
+ if ((shift < 8 * sizeof (result)) && (byte & 0x40))
+ result |= -(((long)1) << shift);
+ *bytes_read_ptr = num_read;
+ return result;
+}
+
+/* Return a pointer to just past the end of an LEB128 number in BUF. */
+
+static gdb_byte *
+skip_leb128 (bfd *abfd, gdb_byte *buf)
+{
+ int byte;
+
+ while (1)
+ {
+ byte = bfd_get_8 (abfd, buf);
+ buf++;
+ if ((byte & 128) == 0)
+ return buf;
+ }
+}
+
+static void
+set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
+{
+ switch (lang)
+ {
+ case DW_LANG_C89:
+ case DW_LANG_C99:
+ case DW_LANG_C:
+ cu->language = language_c;
+ break;
+ case DW_LANG_C_plus_plus:
+ cu->language = language_cplus;
+ break;
+ case DW_LANG_Fortran77:
+ case DW_LANG_Fortran90:
+ case DW_LANG_Fortran95:
+ cu->language = language_fortran;
+ break;
+ case DW_LANG_Mips_Assembler:
+ cu->language = language_asm;
+ break;
+ case DW_LANG_Java:
+ cu->language = language_java;
+ break;
+ case DW_LANG_Ada83:
+ case DW_LANG_Ada95:
+ cu->language = language_ada;
+ break;
+ case DW_LANG_Modula2:
+ cu->language = language_m2;
+ break;
+ case DW_LANG_Pascal83:
+ cu->language = language_pascal;
+ break;
+ case DW_LANG_ObjC:
+ cu->language = language_objc;
+ break;
+ case DW_LANG_Cobol74:
+ case DW_LANG_Cobol85:
+ default:
+ cu->language = language_minimal;
+ break;
+ }
+ cu->language_defn = language_def (cu->language);
+}
+
+/* Return the named attribute or NULL if not there. */
+
+static struct attribute *
+dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
+{
+ unsigned int i;
+ struct attribute *spec = NULL;
+
+ for (i = 0; i < die->num_attrs; ++i)
+ {
+ if (die->attrs[i].name == name)
+ return &die->attrs[i];
+ if (die->attrs[i].name == DW_AT_specification
+ || die->attrs[i].name == DW_AT_abstract_origin)
+ spec = &die->attrs[i];
+ }
+
+ if (spec)
+ {
+ die = follow_die_ref (die, spec, &cu);
+ return dwarf2_attr (die, name, cu);
+ }
+
+ return NULL;
+}
+
+/* Return the named attribute or NULL if not there,
+ but do not follow DW_AT_specification, etc.
+ This is for use in contexts where we're reading .debug_types dies.
+ Following DW_AT_specification, DW_AT_abstract_origin will take us
+ back up the chain, and we want to go down. */
+
+static struct attribute *
+dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
+ struct dwarf2_cu *cu)
+{
+ unsigned int i;
+
+ for (i = 0; i < die->num_attrs; ++i)
+ if (die->attrs[i].name == name)
+ return &die->attrs[i];
+
+ return NULL;
+}
+
+/* Return non-zero iff the attribute NAME is defined for the given DIE,
+ and holds a non-zero value. This function should only be used for
+ DW_FORM_flag attributes. */
+
+static int
+dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
+{
+ struct attribute *attr = dwarf2_attr (die, name, cu);
+
+ return (attr && DW_UNSND (attr));
+}
+
+static int
+die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
+{
+ /* A DIE is a declaration if it has a DW_AT_declaration attribute
+ which value is non-zero. However, we have to be careful with
+ DIEs having a DW_AT_specification attribute, because dwarf2_attr()
+ (via dwarf2_flag_true_p) follows this attribute. So we may
+ end up accidently finding a declaration attribute that belongs
+ to a different DIE referenced by the specification attribute,
+ even though the given DIE does not have a declaration attribute. */
+ return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
+ && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
+}
+
+/* Return the die giving the specification for DIE, if there is
+ one. *SPEC_CU is the CU containing DIE on input, and the CU
+ containing the return value on output. If there is no
+ specification, but there is an abstract origin, that is
+ returned. */
+
+static struct die_info *
+die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
+{
+ struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
+ *spec_cu);
+
+ if (spec_attr == NULL)
+ spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
+
+ if (spec_attr == NULL)
+ return NULL;
+ else
+ return follow_die_ref (die, spec_attr, spec_cu);
+}
+
+/* Free the line_header structure *LH, and any arrays and strings it
+ refers to. */
+static void
+free_line_header (struct line_header *lh)
+{
+ if (lh->standard_opcode_lengths)
+ xfree (lh->standard_opcode_lengths);
+
+ /* Remember that all the lh->file_names[i].name pointers are
+ pointers into debug_line_buffer, and don't need to be freed. */
+ if (lh->file_names)
+ xfree (lh->file_names);
+
+ /* Similarly for the include directory names. */
+ if (lh->include_dirs)
+ xfree (lh->include_dirs);
+
+ xfree (lh);
+}
+
+
+/* Add an entry to LH's include directory table. */
+static void
+add_include_dir (struct line_header *lh, char *include_dir)
+{
+ /* Grow the array if necessary. */
+ if (lh->include_dirs_size == 0)
+ {
+ lh->include_dirs_size = 1; /* for testing */
+ lh->include_dirs = xmalloc (lh->include_dirs_size
+ * sizeof (*lh->include_dirs));
+ }
+ else if (lh->num_include_dirs >= lh->include_dirs_size)
+ {
+ lh->include_dirs_size *= 2;
+ lh->include_dirs = xrealloc (lh->include_dirs,
+ (lh->include_dirs_size
+ * sizeof (*lh->include_dirs)));
+ }
+
+ lh->include_dirs[lh->num_include_dirs++] = include_dir;
+}
+
+
+/* Add an entry to LH's file name table. */
+static void
+add_file_name (struct line_header *lh,
+ char *name,
+ unsigned int dir_index,
+ unsigned int mod_time,
+ unsigned int length)
+{
+ struct file_entry *fe;
+
+ /* Grow the array if necessary. */
+ if (lh->file_names_size == 0)
+ {
+ lh->file_names_size = 1; /* for testing */
+ lh->file_names = xmalloc (lh->file_names_size
+ * sizeof (*lh->file_names));
+ }
+ else if (lh->num_file_names >= lh->file_names_size)
+ {
+ lh->file_names_size *= 2;
+ lh->file_names = xrealloc (lh->file_names,
+ (lh->file_names_size
+ * sizeof (*lh->file_names)));
+ }
+
+ fe = &lh->file_names[lh->num_file_names++];
+ fe->name = name;
+ fe->dir_index = dir_index;
+ fe->mod_time = mod_time;
+ fe->length = length;
+ fe->included_p = 0;
+ fe->symtab = NULL;
+}
+
+
+/* Read the statement program header starting at OFFSET in
+ .debug_line, according to the endianness of ABFD. Return a pointer
+ to a struct line_header, allocated using xmalloc.
+
+ NOTE: the strings in the include directory and file name tables of
+ the returned object point into debug_line_buffer, and must not be
+ freed. */
+static struct line_header *
+dwarf_decode_line_header (unsigned int offset, bfd *abfd,
+ struct dwarf2_cu *cu)
+{
+ struct cleanup *back_to;
+ struct line_header *lh;
+ gdb_byte *line_ptr;
+ unsigned int bytes_read, offset_size;
+ int i;
+ char *cur_dir, *cur_file;
+
+ if (dwarf2_per_objfile->line.buffer == NULL)
+ {
+ complaint (&symfile_complaints, _("missing .debug_line section"));
+ return 0;
+ }
+
+ /* Make sure that at least there's room for the total_length field.
+ That could be 12 bytes long, but we're just going to fudge that. */
+ if (offset + 4 >= dwarf2_per_objfile->line.size)
+ {
+ dwarf2_statement_list_fits_in_line_number_section_complaint ();
+ return 0;
+ }
+
+ lh = xmalloc (sizeof (*lh));
+ memset (lh, 0, sizeof (*lh));
+ back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
+ (void *) lh);
+
+ line_ptr = dwarf2_per_objfile->line.buffer + offset;
+
+ /* Read in the header. */
+ lh->total_length =
+ read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
+ &bytes_read, &offset_size);
+ line_ptr += bytes_read;
+ if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
+ + dwarf2_per_objfile->line.size))
+ {
+ dwarf2_statement_list_fits_in_line_number_section_complaint ();
+ return 0;
+ }
+ lh->statement_program_end = line_ptr + lh->total_length;
+ lh->version = read_2_bytes (abfd, line_ptr);
+ line_ptr += 2;
+ lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
+ line_ptr += offset_size;
+ lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ lh->default_is_stmt = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ lh->line_base = read_1_signed_byte (abfd, line_ptr);
+ line_ptr += 1;
+ lh->line_range = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ lh->opcode_base = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ lh->standard_opcode_lengths
+ = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
+
+ lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
+ for (i = 1; i < lh->opcode_base; ++i)
+ {
+ lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ }
+
+ /* Read directory table. */
+ while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
+ {
+ line_ptr += bytes_read;
+ add_include_dir (lh, cur_dir);
+ }
+ line_ptr += bytes_read;
+
+ /* Read file name table. */
+ while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
+ {
+ unsigned int dir_index, mod_time, length;
+
+ line_ptr += bytes_read;
+ dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+
+ add_file_name (lh, cur_file, dir_index, mod_time, length);
+ }
+ line_ptr += bytes_read;
+ lh->statement_program_start = line_ptr;
+
+ if (line_ptr > (dwarf2_per_objfile->line.buffer
+ + dwarf2_per_objfile->line.size))
+ complaint (&symfile_complaints,
+ _("line number info header doesn't fit in `.debug_line' section"));
+
+ discard_cleanups (back_to);
+ return lh;
+}
+
+/* This function exists to work around a bug in certain compilers
+ (particularly GCC 2.95), in which the first line number marker of a
+ function does not show up until after the prologue, right before
+ the second line number marker. This function shifts ADDRESS down
+ to the beginning of the function if necessary, and is called on
+ addresses passed to record_line. */
+
+static CORE_ADDR
+check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
+{
+ struct function_range *fn;
+
+ /* Find the function_range containing address. */
+ if (!cu->first_fn)
+ return address;
+
+ if (!cu->cached_fn)
+ cu->cached_fn = cu->first_fn;
+
+ fn = cu->cached_fn;
+ while (fn)
+ if (fn->lowpc <= address && fn->highpc > address)
+ goto found;
+ else
+ fn = fn->next;
+
+ fn = cu->first_fn;
+ while (fn && fn != cu->cached_fn)
+ if (fn->lowpc <= address && fn->highpc > address)
+ goto found;
+ else
+ fn = fn->next;
+
+ return address;
+
+ found:
+ if (fn->seen_line)
+ return address;
+ if (address != fn->lowpc)
+ complaint (&symfile_complaints,
+ _("misplaced first line number at 0x%lx for '%s'"),
+ (unsigned long) address, fn->name);
+ fn->seen_line = 1;
+ return fn->lowpc;
+}
+
+/* Decode the Line Number Program (LNP) for the given line_header
+ structure and CU. The actual information extracted and the type
+ of structures created from the LNP depends on the value of PST.
+
+ 1. If PST is NULL, then this procedure uses the data from the program
+ to create all necessary symbol tables, and their linetables.
+ The compilation directory of the file is passed in COMP_DIR,
+ and must not be NULL.
+
+ 2. If PST is not NULL, this procedure reads the program to determine
+ the list of files included by the unit represented by PST, and
+ builds all the associated partial symbol tables. In this case,
+ the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
+ is not used to compute the full name of the symtab, and therefore
+ omitting it when building the partial symtab does not introduce
+ the potential for inconsistency - a partial symtab and its associated
+ symbtab having a different fullname -). */
+
+static void
+dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
+ struct dwarf2_cu *cu, struct partial_symtab *pst)
+{
+ gdb_byte *line_ptr, *extended_end;
+ gdb_byte *line_end;
+ unsigned int bytes_read, extended_len;
+ unsigned char op_code, extended_op, adj_opcode;
+ CORE_ADDR baseaddr;
+ struct objfile *objfile = cu->objfile;
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
+ const int decode_for_pst_p = (pst != NULL);
+ struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ line_ptr = lh->statement_program_start;
+ line_end = lh->statement_program_end;
+
+ /* Read the statement sequences until there's nothing left. */
+ while (line_ptr < line_end)
+ {
+ /* state machine registers */
+ CORE_ADDR address = 0;
+ unsigned int file = 1;
+ unsigned int line = 1;
+ unsigned int column = 0;
+ int is_stmt = lh->default_is_stmt;
+ int basic_block = 0;
+ int end_sequence = 0;
+ CORE_ADDR addr;
+
+ if (!decode_for_pst_p && lh->num_file_names >= file)
+ {
+ /* Start a subfile for the current file of the state machine. */
+ /* lh->include_dirs and lh->file_names are 0-based, but the
+ directory and file name numbers in the statement program
+ are 1-based. */
+ struct file_entry *fe = &lh->file_names[file - 1];
+ char *dir = NULL;
+
+ if (fe->dir_index)
+ dir = lh->include_dirs[fe->dir_index - 1];
+
+ dwarf2_start_subfile (fe->name, dir, comp_dir);
+ }
+
+ /* Decode the table. */
+ while (!end_sequence)
+ {
+ op_code = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ if (line_ptr > line_end)
+ {
+ dwarf2_debug_line_missing_end_sequence_complaint ();
+ break;
+ }
+
+ if (op_code >= lh->opcode_base)
+ {
+ /* Special operand. */
+ adj_opcode = op_code - lh->opcode_base;
+ address += (adj_opcode / lh->line_range)
+ * lh->minimum_instruction_length;
+ line += lh->line_base + (adj_opcode % lh->line_range);
+ if (lh->num_file_names < file || file == 0)
+ dwarf2_debug_line_missing_file_complaint ();
+ else
+ {
+ lh->file_names[file - 1].included_p = 1;
+ if (!decode_for_pst_p && is_stmt)
+ {
+ if (last_subfile != current_subfile)
+ {
+ addr = gdbarch_addr_bits_remove (gdbarch, address);
+ if (last_subfile)
+ record_line (last_subfile, 0, addr);
+ last_subfile = current_subfile;
+ }
+ /* Append row to matrix using current values. */
+ addr = check_cu_functions (address, cu);
+ addr = gdbarch_addr_bits_remove (gdbarch, addr);
+ record_line (current_subfile, line, addr);
+ }
+ }
+ basic_block = 0;
+ }
+ else switch (op_code)
+ {
+ case DW_LNS_extended_op:
+ extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ extended_end = line_ptr + extended_len;
+ extended_op = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ switch (extended_op)
+ {
+ case DW_LNE_end_sequence:
+ end_sequence = 1;
+ break;
+ case DW_LNE_set_address:
+ address = read_address (abfd, line_ptr, cu, &bytes_read);
+ line_ptr += bytes_read;
+ address += baseaddr;
+ break;
+ case DW_LNE_define_file:
+ {
+ char *cur_file;
+ unsigned int dir_index, mod_time, length;
+
+ cur_file = read_string (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ dir_index =
+ read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ mod_time =
+ read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ length =
+ read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ add_file_name (lh, cur_file, dir_index, mod_time, length);
+ }
+ break;
+ case DW_LNE_set_discriminator:
+ /* The discriminator is not interesting to the debugger;
+ just ignore it. */
+ line_ptr = extended_end;
+ break;
+ default:
+ complaint (&symfile_complaints,
+ _("mangled .debug_line section"));
+ return;
+ }
+ /* Make sure that we parsed the extended op correctly. If e.g.
+ we expected a different address size than the producer used,
+ we may have read the wrong number of bytes. */
+ if (line_ptr != extended_end)
+ {
+ complaint (&symfile_complaints,
+ _("mangled .debug_line section"));
+ return;
+ }
+ break;
+ case DW_LNS_copy:
+ if (lh->num_file_names < file || file == 0)
+ dwarf2_debug_line_missing_file_complaint ();
+ else
+ {
+ lh->file_names[file - 1].included_p = 1;
+ if (!decode_for_pst_p && is_stmt)
+ {
+ if (last_subfile != current_subfile)
+ {
+ addr = gdbarch_addr_bits_remove (gdbarch, address);
+ if (last_subfile)
+ record_line (last_subfile, 0, addr);
+ last_subfile = current_subfile;
+ }
+ addr = check_cu_functions (address, cu);
+ addr = gdbarch_addr_bits_remove (gdbarch, addr);
+ record_line (current_subfile, line, addr);
+ }
+ }
+ basic_block = 0;
+ break;
+ case DW_LNS_advance_pc:
+ address += lh->minimum_instruction_length
+ * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ break;
+ case DW_LNS_advance_line:
+ line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ break;
+ case DW_LNS_set_file:
+ {
+ /* The arrays lh->include_dirs and lh->file_names are
+ 0-based, but the directory and file name numbers in
+ the statement program are 1-based. */
+ struct file_entry *fe;
+ char *dir = NULL;
+
+ file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ if (lh->num_file_names < file || file == 0)
+ dwarf2_debug_line_missing_file_complaint ();
+ else
+ {
+ fe = &lh->file_names[file - 1];
+ if (fe->dir_index)
+ dir = lh->include_dirs[fe->dir_index - 1];
+ if (!decode_for_pst_p)
+ {
+ last_subfile = current_subfile;
+ dwarf2_start_subfile (fe->name, dir, comp_dir);
+ }
+ }
+ }
+ break;
+ case DW_LNS_set_column:
+ column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ break;
+ case DW_LNS_negate_stmt:
+ is_stmt = (!is_stmt);
+ break;
+ case DW_LNS_set_basic_block:
+ basic_block = 1;
+ break;
+ /* Add to the address register of the state machine the
+ address increment value corresponding to special opcode
+ 255. I.e., this value is scaled by the minimum
+ instruction length since special opcode 255 would have
+ scaled the the increment. */
+ case DW_LNS_const_add_pc:
+ address += (lh->minimum_instruction_length
+ * ((255 - lh->opcode_base) / lh->line_range));
+ break;
+ case DW_LNS_fixed_advance_pc:
+ address += read_2_bytes (abfd, line_ptr);
+ line_ptr += 2;
+ break;
+ default:
+ {
+ /* Unknown standard opcode, ignore it. */
+ int i;
+
+ for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
+ {
+ (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ line_ptr += bytes_read;
+ }
+ }
+ }
+ }
+ if (lh->num_file_names < file || file == 0)
+ dwarf2_debug_line_missing_file_complaint ();
+ else
+ {
+ lh->file_names[file - 1].included_p = 1;
+ if (!decode_for_pst_p)
+ {
+ addr = gdbarch_addr_bits_remove (gdbarch, address);
+ record_line (current_subfile, 0, addr);
+ }
+ }
+ }
+
+ if (decode_for_pst_p)
+ {
+ int file_index;
+
+ /* Now that we're done scanning the Line Header Program, we can
+ create the psymtab of each included file. */
+ for (file_index = 0; file_index < lh->num_file_names; file_index++)
+ if (lh->file_names[file_index].included_p == 1)
+ {
+ const struct file_entry fe = lh->file_names [file_index];
+ char *include_name = fe.name;
+ char *dir_name = NULL;
+ char *pst_filename = pst->filename;
+
+ if (fe.dir_index)
+ dir_name = lh->include_dirs[fe.dir_index - 1];
+
+ if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL)
+ {
+ include_name = concat (dir_name, SLASH_STRING,
+ include_name, (char *)NULL);
+ make_cleanup (xfree, include_name);
+ }
+
+ if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
+ {
+ pst_filename = concat (pst->dirname, SLASH_STRING,
+ pst_filename, (char *)NULL);
+ make_cleanup (xfree, pst_filename);
+ }
+
+ if (strcmp (include_name, pst_filename) != 0)
+ dwarf2_create_include_psymtab (include_name, pst, objfile);
+ }
+ }
+ else
+ {
+ /* Make sure a symtab is created for every file, even files
+ which contain only variables (i.e. no code with associated
+ line numbers). */
+
+ int i;
+ struct file_entry *fe;
+
+ for (i = 0; i < lh->num_file_names; i++)
+ {
+ char *dir = NULL;
+ fe = &lh->file_names[i];
+ if (fe->dir_index)
+ dir = lh->include_dirs[fe->dir_index - 1];
+ dwarf2_start_subfile (fe->name, dir, comp_dir);
+
+ /* Skip the main file; we don't need it, and it must be
+ allocated last, so that it will show up before the
+ non-primary symtabs in the objfile's symtab list. */
+ if (current_subfile == first_subfile)
+ continue;
+
+ if (current_subfile->symtab == NULL)
+ current_subfile->symtab = allocate_symtab (current_subfile->name,
+ cu->objfile);
+ fe->symtab = current_subfile->symtab;
+ }
+ }
+}
+
+/* Start a subfile for DWARF. FILENAME is the name of the file and
+ DIRNAME the name of the source directory which contains FILENAME
+ or NULL if not known. COMP_DIR is the compilation directory for the
+ linetable's compilation unit or NULL if not known.
+ This routine tries to keep line numbers from identical absolute and
+ relative file names in a common subfile.
+
+ Using the `list' example from the GDB testsuite, which resides in
+ /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
+ of /srcdir/list0.c yields the following debugging information for list0.c:
+
+ DW_AT_name: /srcdir/list0.c
+ DW_AT_comp_dir: /compdir
+ files.files[0].name: list0.h
+ files.files[0].dir: /srcdir
+ files.files[1].name: list0.c
+ files.files[1].dir: /srcdir
+
+ The line number information for list0.c has to end up in a single
+ subfile, so that `break /srcdir/list0.c:1' works as expected.
+ start_subfile will ensure that this happens provided that we pass the
+ concatenation of files.files[1].dir and files.files[1].name as the
+ subfile's name. */
+
+static void
+dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
+{
+ char *fullname;
+
+ /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
+ `start_symtab' will always pass the contents of DW_AT_comp_dir as
+ second argument to start_subfile. To be consistent, we do the
+ same here. In order not to lose the line information directory,
+ we concatenate it to the filename when it makes sense.
+ Note that the Dwarf3 standard says (speaking of filenames in line
+ information): ``The directory index is ignored for file names
+ that represent full path names''. Thus ignoring dirname in the
+ `else' branch below isn't an issue. */
+
+ if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
+ fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
+ else
+ fullname = filename;
+
+ start_subfile (fullname, comp_dir);
+
+ if (fullname != filename)
+ xfree (fullname);
+}
+
+static void
+var_decode_location (struct attribute *attr, struct symbol *sym,
+ struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct comp_unit_head *cu_header = &cu->header;
+
+ /* NOTE drow/2003-01-30: There used to be a comment and some special
+ code here to turn a symbol with DW_AT_external and a
+ SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
+ necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
+ with some versions of binutils) where shared libraries could have
+ relocations against symbols in their debug information - the
+ minimal symbol would have the right address, but the debug info
+ would not. It's no longer necessary, because we will explicitly
+ apply relocations when we read in the debug information now. */
+
+ /* A DW_AT_location attribute with no contents indicates that a
+ variable has been optimized away. */
+ if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
+ {
+ SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
+ return;
+ }
+
+ /* Handle one degenerate form of location expression specially, to
+ preserve GDB's previous behavior when section offsets are
+ specified. If this is just a DW_OP_addr then mark this symbol
+ as LOC_STATIC. */
+
+ if (attr_form_is_block (attr)
+ && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
+ && DW_BLOCK (attr)->data[0] == DW_OP_addr)
+ {
+ unsigned int dummy;
+
+ SYMBOL_VALUE_ADDRESS (sym) =
+ read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
+ SYMBOL_CLASS (sym) = LOC_STATIC;
+ fixup_symbol_section (sym, objfile);
+ SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
+ SYMBOL_SECTION (sym));
+ return;
+ }
+
+ /* NOTE drow/2002-01-30: It might be worthwhile to have a static
+ expression evaluator, and use LOC_COMPUTED only when necessary
+ (i.e. when the value of a register or memory location is
+ referenced, or a thread-local block, etc.). Then again, it might
+ not be worthwhile. I'm assuming that it isn't unless performance
+ or memory numbers show me otherwise. */
+
+ dwarf2_symbol_mark_computed (attr, sym, cu);
+ SYMBOL_CLASS (sym) = LOC_COMPUTED;
+}
+
+/* Given a pointer to a DWARF information entry, figure out if we need
+ to make a symbol table entry for it, and if so, create a new entry
+ and return a pointer to it.
+ If TYPE is NULL, determine symbol type from the die, otherwise
+ used the passed type. */
+
+static struct symbol *
+new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct symbol *sym = NULL;
+ char *name;
+ struct attribute *attr = NULL;
+ struct attribute *attr2 = NULL;
+ CORE_ADDR baseaddr;
+ int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ if (die->tag != DW_TAG_namespace)
+ name = dwarf2_linkage_name (die, cu);
+ else
+ name = TYPE_NAME (type);
+
+ if (name)
+ {
+ sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
+ sizeof (struct symbol));
+ OBJSTAT (objfile, n_syms++);
+ memset (sym, 0, sizeof (struct symbol));
+
+ /* Cache this symbol's name and the name's demangled form (if any). */
+ SYMBOL_LANGUAGE (sym) = cu->language;
+ SYMBOL_SET_NAMES (sym, name, strlen (name), 0, objfile);
+
+ /* Default assumptions.
+ Use the passed type or decode it from the die. */
+ SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
+ SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
+ if (type != NULL)
+ SYMBOL_TYPE (sym) = type;
+ else
+ SYMBOL_TYPE (sym) = die_type (die, cu);
+ attr = dwarf2_attr (die,
+ inlined_func ? DW_AT_call_line : DW_AT_decl_line,
+ cu);
+ if (attr)
+ {
+ SYMBOL_LINE (sym) = DW_UNSND (attr);
+ }
+
+ attr = dwarf2_attr (die,
+ inlined_func ? DW_AT_call_file : DW_AT_decl_file,
+ cu);
+ if (attr)
+ {
+ int file_index = DW_UNSND (attr);
+ if (cu->line_header == NULL
+ || file_index > cu->line_header->num_file_names)
+ complaint (&symfile_complaints,
+ _("file index out of range"));
+ else if (file_index > 0)
+ {
+ struct file_entry *fe;
+ fe = &cu->line_header->file_names[file_index - 1];
+ SYMBOL_SYMTAB (sym) = fe->symtab;
+ }
+ }
+
+ switch (die->tag)
+ {
+ case DW_TAG_label:
+ attr = dwarf2_attr (die, DW_AT_low_pc, cu);
+ if (attr)
+ {
+ SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
+ }
+ SYMBOL_CLASS (sym) = LOC_LABEL;
+ break;
+ case DW_TAG_subprogram:
+ /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
+ finish_block. */
+ SYMBOL_CLASS (sym) = LOC_BLOCK;
+ attr2 = dwarf2_attr (die, DW_AT_external, cu);
+ if ((attr2 && (DW_UNSND (attr2) != 0))
+ || cu->language == language_ada)
+ {
+ /* Subprograms marked external are stored as a global symbol.
+ Ada subprograms, whether marked external or not, are always
+ stored as a global symbol, because we want to be able to
+ access them globally. For instance, we want to be able
+ to break on a nested subprogram without having to
+ specify the context. */
+ add_symbol_to_list (sym, &global_symbols);
+ }
+ else
+ {
+ add_symbol_to_list (sym, cu->list_in_scope);
+ }
+ break;
+ case DW_TAG_inlined_subroutine:
+ /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
+ finish_block. */
+ SYMBOL_CLASS (sym) = LOC_BLOCK;
+ SYMBOL_INLINED (sym) = 1;
+ /* Do not add the symbol to any lists. It will be found via
+ BLOCK_FUNCTION from the blockvector. */
+ break;
+ case DW_TAG_variable:
+ /* Compilation with minimal debug info may result in variables
+ with missing type entries. Change the misleading `void' type
+ to something sensible. */
+ if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
+ SYMBOL_TYPE (sym)
+ = objfile_type (objfile)->nodebug_data_symbol;
+
+ attr = dwarf2_attr (die, DW_AT_const_value, cu);
+ if (attr)
+ {
+ dwarf2_const_value (attr, sym, cu);
+ attr2 = dwarf2_attr (die, DW_AT_external, cu);
+ if (attr2 && (DW_UNSND (attr2) != 0))
+ add_symbol_to_list (sym, &global_symbols);
+ else
+ add_symbol_to_list (sym, cu->list_in_scope);
+ break;
+ }
+ attr = dwarf2_attr (die, DW_AT_location, cu);
+ if (attr)
+ {
+ var_decode_location (attr, sym, cu);
+ attr2 = dwarf2_attr (die, DW_AT_external, cu);
+ if (attr2 && (DW_UNSND (attr2) != 0))
+ add_symbol_to_list (sym, &global_symbols);
+ else
+ add_symbol_to_list (sym, cu->list_in_scope);
+ }
+ else
+ {
+ /* We do not know the address of this symbol.
+ If it is an external symbol and we have type information
+ for it, enter the symbol as a LOC_UNRESOLVED symbol.
+ The address of the variable will then be determined from
+ the minimal symbol table whenever the variable is
+ referenced. */
+ attr2 = dwarf2_attr (die, DW_AT_external, cu);
+ if (attr2 && (DW_UNSND (attr2) != 0)
+ && dwarf2_attr (die, DW_AT_type, cu) != NULL)
+ {
+ SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
+ add_symbol_to_list (sym, cu->list_in_scope);
+ }
+ else if (!die_is_declaration (die, cu))
+ {
+ /* Use the default LOC_OPTIMIZED_OUT class. */
+ gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
+ add_symbol_to_list (sym, cu->list_in_scope);
+ }
+ }
+ break;
+ case DW_TAG_formal_parameter:
+ /* If we are inside a function, mark this as an argument. If
+ not, we might be looking at an argument to an inlined function
+ when we do not have enough information to show inlined frames;
+ pretend it's a local variable in that case so that the user can
+ still see it. */
+ if (context_stack_depth > 0
+ && context_stack[context_stack_depth - 1].name != NULL)
+ SYMBOL_IS_ARGUMENT (sym) = 1;
+ attr = dwarf2_attr (die, DW_AT_location, cu);
+ if (attr)
+ {
+ var_decode_location (attr, sym, cu);
+ }
+ attr = dwarf2_attr (die, DW_AT_const_value, cu);
+ if (attr)
+ {
+ dwarf2_const_value (attr, sym, cu);
+ }
+ add_symbol_to_list (sym, cu->list_in_scope);
+ break;
+ case DW_TAG_unspecified_parameters:
+ /* From varargs functions; gdb doesn't seem to have any
+ interest in this information, so just ignore it for now.
+ (FIXME?) */
+ break;
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ case DW_TAG_set_type:
+ case DW_TAG_enumeration_type:
+ SYMBOL_CLASS (sym) = LOC_TYPEDEF;
+ SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
+
+ /* Make sure that the symbol includes appropriate enclosing
+ classes/namespaces in its name. These are calculated in
+ read_structure_type, and the correct name is saved in
+ the type. */
+
+ if (cu->language == language_cplus
+ || cu->language == language_java)
+ {
+ struct type *type = SYMBOL_TYPE (sym);
+
+ if (TYPE_TAG_NAME (type) != NULL)
+ {
+ /* FIXME: carlton/2003-11-10: Should this use
+ SYMBOL_SET_NAMES instead? (The same problem also
+ arises further down in this function.) */
+ /* The type's name is already allocated along with
+ this objfile, so we don't need to duplicate it
+ for the symbol. */
+ SYMBOL_LINKAGE_NAME (sym) = TYPE_TAG_NAME (type);
+ }
+ }
+
+ {
+ /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
+ really ever be static objects: otherwise, if you try
+ to, say, break of a class's method and you're in a file
+ which doesn't mention that class, it won't work unless
+ the check for all static symbols in lookup_symbol_aux
+ saves you. See the OtherFileClass tests in
+ gdb.c++/namespace.exp. */
+
+ struct pending **list_to_add;
+
+ list_to_add = (cu->list_in_scope == &file_symbols
+ && (cu->language == language_cplus
+ || cu->language == language_java)
+ ? &global_symbols : cu->list_in_scope);
+
+ add_symbol_to_list (sym, list_to_add);
+
+ /* The semantics of C++ state that "struct foo { ... }" also
+ defines a typedef for "foo". A Java class declaration also
+ defines a typedef for the class. */
+ if (cu->language == language_cplus
+ || cu->language == language_java
+ || cu->language == language_ada)
+ {
+ /* The symbol's name is already allocated along with
+ this objfile, so we don't need to duplicate it for
+ the type. */
+ if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
+ TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
+ }
+ }
+ break;
+ case DW_TAG_typedef:
+ SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu);
+ SYMBOL_CLASS (sym) = LOC_TYPEDEF;
+ SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
+ add_symbol_to_list (sym, cu->list_in_scope);
+ break;
+ case DW_TAG_base_type:
+ case DW_TAG_subrange_type:
+ SYMBOL_CLASS (sym) = LOC_TYPEDEF;
+ SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
+ add_symbol_to_list (sym, cu->list_in_scope);
+ break;
+ case DW_TAG_enumerator:
+ SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu);
+ attr = dwarf2_attr (die, DW_AT_const_value, cu);
+ if (attr)
+ {
+ dwarf2_const_value (attr, sym, cu);
+ }
+ {
+ /* NOTE: carlton/2003-11-10: See comment above in the
+ DW_TAG_class_type, etc. block. */
+
+ struct pending **list_to_add;
+
+ list_to_add = (cu->list_in_scope == &file_symbols
+ && (cu->language == language_cplus
+ || cu->language == language_java)
+ ? &global_symbols : cu->list_in_scope);
+
+ add_symbol_to_list (sym, list_to_add);
+ }
+ break;
+ case DW_TAG_namespace:
+ SYMBOL_CLASS (sym) = LOC_TYPEDEF;
+ add_symbol_to_list (sym, &global_symbols);
+ break;
+ default:
+ /* Not a tag we recognize. Hopefully we aren't processing
+ trash data, but since we must specifically ignore things
+ we don't recognize, there is nothing else we should do at
+ this point. */
+ complaint (&symfile_complaints, _("unsupported tag: '%s'"),
+ dwarf_tag_name (die->tag));
+ break;
+ }
+
+ /* For the benefit of old versions of GCC, check for anonymous
+ namespaces based on the demangled name. */
+ if (!processing_has_namespace_info
+ && cu->language == language_cplus
+ && dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu) != NULL)
+ cp_scan_for_anonymous_namespaces (sym);
+ }
+ return (sym);
+}
+
+/* Copy constant value from an attribute to a symbol. */
+
+static void
+dwarf2_const_value (struct attribute *attr, struct symbol *sym,
+ struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct comp_unit_head *cu_header = &cu->header;
+ enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
+ BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
+ struct dwarf_block *blk;
+
+ switch (attr->form)
+ {
+ case DW_FORM_addr:
+ if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
+ dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
+ cu_header->addr_size,
+ TYPE_LENGTH (SYMBOL_TYPE
+ (sym)));
+ SYMBOL_VALUE_BYTES (sym) =
+ obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size);
+ /* NOTE: cagney/2003-05-09: In-lined store_address call with
+ it's body - store_unsigned_integer. */
+ store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
+ byte_order, DW_ADDR (attr));
+ SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
+ break;
+ case DW_FORM_string:
+ case DW_FORM_strp:
+ /* DW_STRING is already allocated on the obstack, point directly
+ to it. */
+ SYMBOL_VALUE_BYTES (sym) = (gdb_byte *) DW_STRING (attr);
+ SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
+ break;
+ case DW_FORM_block1:
+ case DW_FORM_block2:
+ case DW_FORM_block4:
+ case DW_FORM_block:
+ blk = DW_BLOCK (attr);
+ if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
+ dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
+ blk->size,
+ TYPE_LENGTH (SYMBOL_TYPE
+ (sym)));
+ SYMBOL_VALUE_BYTES (sym) =
+ obstack_alloc (&objfile->objfile_obstack, blk->size);
+ memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
+ SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
+ break;
+
+ /* The DW_AT_const_value attributes are supposed to carry the
+ symbol's value "represented as it would be on the target
+ architecture." By the time we get here, it's already been
+ converted to host endianness, so we just need to sign- or
+ zero-extend it as appropriate. */
+ case DW_FORM_data1:
+ dwarf2_const_value_data (attr, sym, 8);
+ break;
+ case DW_FORM_data2:
+ dwarf2_const_value_data (attr, sym, 16);
+ break;
+ case DW_FORM_data4:
+ dwarf2_const_value_data (attr, sym, 32);
+ break;
+ case DW_FORM_data8:
+ dwarf2_const_value_data (attr, sym, 64);
+ break;
+
+ case DW_FORM_sdata:
+ SYMBOL_VALUE (sym) = DW_SND (attr);
+ SYMBOL_CLASS (sym) = LOC_CONST;
+ break;
+
+ case DW_FORM_udata:
+ SYMBOL_VALUE (sym) = DW_UNSND (attr);
+ SYMBOL_CLASS (sym) = LOC_CONST;
+ break;
+
+ default:
+ complaint (&symfile_complaints,
+ _("unsupported const value attribute form: '%s'"),
+ dwarf_form_name (attr->form));
+ SYMBOL_VALUE (sym) = 0;
+ SYMBOL_CLASS (sym) = LOC_CONST;
+ break;
+ }
+}
+
+
+/* Given an attr with a DW_FORM_dataN value in host byte order, sign-
+ or zero-extend it as appropriate for the symbol's type. */
+static void
+dwarf2_const_value_data (struct attribute *attr,
+ struct symbol *sym,
+ int bits)
+{
+ LONGEST l = DW_UNSND (attr);
+
+ if (bits < sizeof (l) * 8)
+ {
+ if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
+ l &= ((LONGEST) 1 << bits) - 1;
+ else
+ l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
+ }
+
+ SYMBOL_VALUE (sym) = l;
+ SYMBOL_CLASS (sym) = LOC_CONST;
+}
+
+
+/* Return the type of the die in question using its DW_AT_type attribute. */
+
+static struct type *
+die_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *type;
+ struct attribute *type_attr;
+ struct die_info *type_die;
+
+ type_attr = dwarf2_attr (die, DW_AT_type, cu);
+ if (!type_attr)
+ {
+ /* A missing DW_AT_type represents a void type. */
+ return objfile_type (cu->objfile)->builtin_void;
+ }
+
+ type_die = follow_die_ref_or_sig (die, type_attr, &cu);
+
+ type = tag_type_to_type (type_die, cu);
+ if (!type)
+ {
+ dump_die_for_error (type_die);
+ error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
+ cu->objfile->name);
+ }
+ return type;
+}
+
+/* Return the containing type of the die in question using its
+ DW_AT_containing_type attribute. */
+
+static struct type *
+die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *type = NULL;
+ struct attribute *type_attr;
+ struct die_info *type_die = NULL;
+
+ type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
+ if (type_attr)
+ {
+ type_die = follow_die_ref_or_sig (die, type_attr, &cu);
+ type = tag_type_to_type (type_die, cu);
+ }
+ if (!type)
+ {
+ if (type_die)
+ dump_die_for_error (type_die);
+ error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
+ cu->objfile->name);
+ }
+ return type;
+}
+
+static struct type *
+tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *this_type;
+
+ this_type = read_type_die (die, cu);
+ if (!this_type)
+ {
+ dump_die_for_error (die);
+ error (_("Dwarf Error: Cannot find type of die [in module %s]"),
+ cu->objfile->name);
+ }
+ return this_type;
+}
+
+static struct type *
+read_type_die (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *this_type;
+
+ this_type = get_die_type (die, cu);
+ if (this_type)
+ return this_type;
+
+ switch (die->tag)
+ {
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ this_type = read_structure_type (die, cu);
+ break;
+ case DW_TAG_enumeration_type:
+ this_type = read_enumeration_type (die, cu);
+ break;
+ case DW_TAG_subprogram:
+ case DW_TAG_subroutine_type:
+ case DW_TAG_inlined_subroutine:
+ this_type = read_subroutine_type (die, cu);
+ break;
+ case DW_TAG_array_type:
+ this_type = read_array_type (die, cu);
+ break;
+ case DW_TAG_set_type:
+ this_type = read_set_type (die, cu);
+ break;
+ case DW_TAG_pointer_type:
+ this_type = read_tag_pointer_type (die, cu);
+ break;
+ case DW_TAG_ptr_to_member_type:
+ this_type = read_tag_ptr_to_member_type (die, cu);
+ break;
+ case DW_TAG_reference_type:
+ this_type = read_tag_reference_type (die, cu);
+ break;
+ case DW_TAG_const_type:
+ this_type = read_tag_const_type (die, cu);
+ break;
+ case DW_TAG_volatile_type:
+ this_type = read_tag_volatile_type (die, cu);
+ break;
+ case DW_TAG_string_type:
+ this_type = read_tag_string_type (die, cu);
+ break;
+ case DW_TAG_typedef:
+ this_type = read_typedef (die, cu);
+ break;
+ case DW_TAG_subrange_type:
+ this_type = read_subrange_type (die, cu);
+ break;
+ case DW_TAG_base_type:
+ this_type = read_base_type (die, cu);
+ break;
+ case DW_TAG_unspecified_type:
+ this_type = read_unspecified_type (die, cu);
+ break;
+ case DW_TAG_namespace:
+ this_type = read_namespace_type (die, cu);
+ break;
+ default:
+ complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
+ dwarf_tag_name (die->tag));
+ break;
+ }
+
+ return this_type;
+}
+
+/* Return the name of the namespace/class that DIE is defined within,
+ or "" if we can't tell. The caller should not xfree the result.
+
+ For example, if we're within the method foo() in the following
+ code:
+
+ namespace N {
+ class C {
+ void foo () {
+ }
+ };
+ }
+
+ then determine_prefix on foo's die will return "N::C". */
+
+static char *
+determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct die_info *parent, *spec_die;
+ struct dwarf2_cu *spec_cu;
+ struct type *parent_type;
+
+ if (cu->language != language_cplus
+ && cu->language != language_java)
+ return "";
+
+ /* We have to be careful in the presence of DW_AT_specification.
+ For example, with GCC 3.4, given the code
+
+ namespace N {
+ void foo() {
+ // Definition of N::foo.
+ }
+ }
+
+ then we'll have a tree of DIEs like this:
+
+ 1: DW_TAG_compile_unit
+ 2: DW_TAG_namespace // N
+ 3: DW_TAG_subprogram // declaration of N::foo
+ 4: DW_TAG_subprogram // definition of N::foo
+ DW_AT_specification // refers to die #3
+
+ Thus, when processing die #4, we have to pretend that we're in
+ the context of its DW_AT_specification, namely the contex of die
+ #3. */
+ spec_cu = cu;
+ spec_die = die_specification (die, &spec_cu);
+ if (spec_die == NULL)
+ parent = die->parent;
+ else
+ {
+ parent = spec_die->parent;
+ cu = spec_cu;
+ }
+
+ if (parent == NULL)
+ return "";
+ else
+ switch (parent->tag)
+ {
+ case DW_TAG_namespace:
+ parent_type = read_type_die (parent, cu);
+ /* We give a name to even anonymous namespaces. */
+ return TYPE_TAG_NAME (parent_type);
+ case DW_TAG_class_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ parent_type = read_type_die (parent, cu);
+ if (TYPE_TAG_NAME (parent_type) != NULL)
+ return TYPE_TAG_NAME (parent_type);
+ else
+ /* An anonymous structure is only allowed non-static data
+ members; no typedefs, no member functions, et cetera.
+ So it does not need a prefix. */
+ return "";
+ default:
+ return determine_prefix (parent, cu);
+ }
+}
+
+/* Return a newly-allocated string formed by concatenating PREFIX and
+ SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
+ simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
+ perform an obconcat, otherwise allocate storage for the result. The CU argument
+ is used to determine the language and hence, the appropriate separator. */
+
+#define MAX_SEP_LEN 2 /* sizeof ("::") */
+
+static char *
+typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
+ struct dwarf2_cu *cu)
+{
+ char *sep;
+
+ if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
+ sep = "";
+ else if (cu->language == language_java)
+ sep = ".";
+ else
+ sep = "::";
+
+ if (prefix == NULL)
+ prefix = "";
+ if (suffix == NULL)
+ suffix = "";
+
+ if (obs == NULL)
+ {
+ char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
+ strcpy (retval, prefix);
+ strcat (retval, sep);
+ strcat (retval, suffix);
+ return retval;
+ }
+ else
+ {
+ /* We have an obstack. */
+ return obconcat (obs, prefix, sep, suffix);
+ }
+}
+
+/* Return sibling of die, NULL if no sibling. */
+
+static struct die_info *
+sibling_die (struct die_info *die)
+{
+ return die->sibling;
+}
+
+/* Get linkage name of a die, return NULL if not found. */
+
+static char *
+dwarf2_linkage_name (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
+
+ attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
+ if (attr && DW_STRING (attr))
+ return DW_STRING (attr);
+ return dwarf2_name (die, cu);
+}
+
+/* Get name of a die, return NULL if not found. */
+
+static char *
+dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
+ struct obstack *obstack)
+{
+ if (name && cu->language == language_cplus)
+ {
+ char *canon_name = cp_canonicalize_string (name);
+
+ if (canon_name != NULL)
+ {
+ if (strcmp (canon_name, name) != 0)
+ name = obsavestring (canon_name, strlen (canon_name),
+ obstack);
+ xfree (canon_name);
+ }
+ }
+
+ return name;
+}
+
+/* Get name of a die, return NULL if not found. */
+
+static char *
+dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
+
+ attr = dwarf2_attr (die, DW_AT_name, cu);
+ if (!attr || !DW_STRING (attr))
+ return NULL;
+
+ switch (die->tag)
+ {
+ case DW_TAG_compile_unit:
+ /* Compilation units have a DW_AT_name that is a filename, not
+ a source language identifier. */
+ case DW_TAG_enumeration_type:
+ case DW_TAG_enumerator:
+ /* These tags always have simple identifiers already; no need
+ to canonicalize them. */
+ return DW_STRING (attr);
+ default:
+ if (!DW_STRING_IS_CANONICAL (attr))
+ {
+ DW_STRING (attr)
+ = dwarf2_canonicalize_name (DW_STRING (attr), cu,
+ &cu->objfile->objfile_obstack);
+ DW_STRING_IS_CANONICAL (attr) = 1;
+ }
+ return DW_STRING (attr);
+ }
+}
+
+/* Return the die that this die in an extension of, or NULL if there
+ is none. *EXT_CU is the CU containing DIE on input, and the CU
+ containing the return value on output. */
+
+static struct die_info *
+dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
+{
+ struct attribute *attr;
+
+ attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
+ if (attr == NULL)
+ return NULL;
+
+ return follow_die_ref (die, attr, ext_cu);
+}
+
+/* Convert a DIE tag into its string name. */
+
+static char *
+dwarf_tag_name (unsigned tag)
+{
+ switch (tag)
+ {
+ case DW_TAG_padding:
+ return "DW_TAG_padding";
+ case DW_TAG_array_type:
+ return "DW_TAG_array_type";
+ case DW_TAG_class_type:
+ return "DW_TAG_class_type";
+ case DW_TAG_entry_point:
+ return "DW_TAG_entry_point";
+ case DW_TAG_enumeration_type:
+ return "DW_TAG_enumeration_type";
+ case DW_TAG_formal_parameter:
+ return "DW_TAG_formal_parameter";
+ case DW_TAG_imported_declaration:
+ return "DW_TAG_imported_declaration";
+ case DW_TAG_label:
+ return "DW_TAG_label";
+ case DW_TAG_lexical_block:
+ return "DW_TAG_lexical_block";
+ case DW_TAG_member:
+ return "DW_TAG_member";
+ case DW_TAG_pointer_type:
+ return "DW_TAG_pointer_type";
+ case DW_TAG_reference_type:
+ return "DW_TAG_reference_type";
+ case DW_TAG_compile_unit:
+ return "DW_TAG_compile_unit";
+ case DW_TAG_string_type:
+ return "DW_TAG_string_type";
+ case DW_TAG_structure_type:
+ return "DW_TAG_structure_type";
+ case DW_TAG_subroutine_type:
+ return "DW_TAG_subroutine_type";
+ case DW_TAG_typedef:
+ return "DW_TAG_typedef";
+ case DW_TAG_union_type:
+ return "DW_TAG_union_type";
+ case DW_TAG_unspecified_parameters:
+ return "DW_TAG_unspecified_parameters";
+ case DW_TAG_variant:
+ return "DW_TAG_variant";
+ case DW_TAG_common_block:
+ return "DW_TAG_common_block";
+ case DW_TAG_common_inclusion:
+ return "DW_TAG_common_inclusion";
+ case DW_TAG_inheritance:
+ return "DW_TAG_inheritance";
+ case DW_TAG_inlined_subroutine:
+ return "DW_TAG_inlined_subroutine";
+ case DW_TAG_module:
+ return "DW_TAG_module";
+ case DW_TAG_ptr_to_member_type:
+ return "DW_TAG_ptr_to_member_type";
+ case DW_TAG_set_type:
+ return "DW_TAG_set_type";
+ case DW_TAG_subrange_type:
+ return "DW_TAG_subrange_type";
+ case DW_TAG_with_stmt:
+ return "DW_TAG_with_stmt";
+ case DW_TAG_access_declaration:
+ return "DW_TAG_access_declaration";
+ case DW_TAG_base_type:
+ return "DW_TAG_base_type";
+ case DW_TAG_catch_block:
+ return "DW_TAG_catch_block";
+ case DW_TAG_const_type:
+ return "DW_TAG_const_type";
+ case DW_TAG_constant:
+ return "DW_TAG_constant";
+ case DW_TAG_enumerator:
+ return "DW_TAG_enumerator";
+ case DW_TAG_file_type:
+ return "DW_TAG_file_type";
+ case DW_TAG_friend:
+ return "DW_TAG_friend";
+ case DW_TAG_namelist:
+ return "DW_TAG_namelist";
+ case DW_TAG_namelist_item:
+ return "DW_TAG_namelist_item";
+ case DW_TAG_packed_type:
+ return "DW_TAG_packed_type";
+ case DW_TAG_subprogram:
+ return "DW_TAG_subprogram";
+ case DW_TAG_template_type_param:
+ return "DW_TAG_template_type_param";
+ case DW_TAG_template_value_param:
+ return "DW_TAG_template_value_param";
+ case DW_TAG_thrown_type:
+ return "DW_TAG_thrown_type";
+ case DW_TAG_try_block:
+ return "DW_TAG_try_block";
+ case DW_TAG_variant_part:
+ return "DW_TAG_variant_part";
+ case DW_TAG_variable:
+ return "DW_TAG_variable";
+ case DW_TAG_volatile_type:
+ return "DW_TAG_volatile_type";
+ case DW_TAG_dwarf_procedure:
+ return "DW_TAG_dwarf_procedure";
+ case DW_TAG_restrict_type:
+ return "DW_TAG_restrict_type";
+ case DW_TAG_interface_type:
+ return "DW_TAG_interface_type";
+ case DW_TAG_namespace:
+ return "DW_TAG_namespace";
+ case DW_TAG_imported_module:
+ return "DW_TAG_imported_module";
+ case DW_TAG_unspecified_type:
+ return "DW_TAG_unspecified_type";
+ case DW_TAG_partial_unit:
+ return "DW_TAG_partial_unit";
+ case DW_TAG_imported_unit:
+ return "DW_TAG_imported_unit";
+ case DW_TAG_condition:
+ return "DW_TAG_condition";
+ case DW_TAG_shared_type:
+ return "DW_TAG_shared_type";
+ case DW_TAG_type_unit:
+ return "DW_TAG_type_unit";
+ case DW_TAG_MIPS_loop:
+ return "DW_TAG_MIPS_loop";
+ case DW_TAG_HP_array_descriptor:
+ return "DW_TAG_HP_array_descriptor";
+ case DW_TAG_format_label:
+ return "DW_TAG_format_label";
+ case DW_TAG_function_template:
+ return "DW_TAG_function_template";
+ case DW_TAG_class_template:
+ return "DW_TAG_class_template";
+ case DW_TAG_GNU_BINCL:
+ return "DW_TAG_GNU_BINCL";
+ case DW_TAG_GNU_EINCL:
+ return "DW_TAG_GNU_EINCL";
+ case DW_TAG_upc_shared_type:
+ return "DW_TAG_upc_shared_type";
+ case DW_TAG_upc_strict_type:
+ return "DW_TAG_upc_strict_type";
+ case DW_TAG_upc_relaxed_type:
+ return "DW_TAG_upc_relaxed_type";
+ case DW_TAG_PGI_kanji_type:
+ return "DW_TAG_PGI_kanji_type";
+ case DW_TAG_PGI_interface_block:
+ return "DW_TAG_PGI_interface_block";
+ default:
+ return "DW_TAG_<unknown>";
+ }
+}
+
+/* Convert a DWARF attribute code into its string name. */
+
+static char *
+dwarf_attr_name (unsigned attr)
+{
+ switch (attr)
+ {
+ case DW_AT_sibling:
+ return "DW_AT_sibling";
+ case DW_AT_location:
+ return "DW_AT_location";
+ case DW_AT_name:
+ return "DW_AT_name";
+ case DW_AT_ordering:
+ return "DW_AT_ordering";
+ case DW_AT_subscr_data:
+ return "DW_AT_subscr_data";
+ case DW_AT_byte_size:
+ return "DW_AT_byte_size";
+ case DW_AT_bit_offset:
+ return "DW_AT_bit_offset";
+ case DW_AT_bit_size:
+ return "DW_AT_bit_size";
+ case DW_AT_element_list:
+ return "DW_AT_element_list";
+ case DW_AT_stmt_list:
+ return "DW_AT_stmt_list";
+ case DW_AT_low_pc:
+ return "DW_AT_low_pc";
+ case DW_AT_high_pc:
+ return "DW_AT_high_pc";
+ case DW_AT_language:
+ return "DW_AT_language";
+ case DW_AT_member:
+ return "DW_AT_member";
+ case DW_AT_discr:
+ return "DW_AT_discr";
+ case DW_AT_discr_value:
+ return "DW_AT_discr_value";
+ case DW_AT_visibility:
+ return "DW_AT_visibility";
+ case DW_AT_import:
+ return "DW_AT_import";
+ case DW_AT_string_length:
+ return "DW_AT_string_length";
+ case DW_AT_common_reference:
+ return "DW_AT_common_reference";
+ case DW_AT_comp_dir:
+ return "DW_AT_comp_dir";
+ case DW_AT_const_value:
+ return "DW_AT_const_value";
+ case DW_AT_containing_type:
+ return "DW_AT_containing_type";
+ case DW_AT_default_value:
+ return "DW_AT_default_value";
+ case DW_AT_inline:
+ return "DW_AT_inline";
+ case DW_AT_is_optional:
+ return "DW_AT_is_optional";
+ case DW_AT_lower_bound:
+ return "DW_AT_lower_bound";
+ case DW_AT_producer:
+ return "DW_AT_producer";
+ case DW_AT_prototyped:
+ return "DW_AT_prototyped";
+ case DW_AT_return_addr:
+ return "DW_AT_return_addr";
+ case DW_AT_start_scope:
+ return "DW_AT_start_scope";
+ case DW_AT_bit_stride:
+ return "DW_AT_bit_stride";
+ case DW_AT_upper_bound:
+ return "DW_AT_upper_bound";
+ case DW_AT_abstract_origin:
+ return "DW_AT_abstract_origin";
+ case DW_AT_accessibility:
+ return "DW_AT_accessibility";
+ case DW_AT_address_class:
+ return "DW_AT_address_class";
+ case DW_AT_artificial:
+ return "DW_AT_artificial";
+ case DW_AT_base_types:
+ return "DW_AT_base_types";
+ case DW_AT_calling_convention:
+ return "DW_AT_calling_convention";
+ case DW_AT_count:
+ return "DW_AT_count";
+ case DW_AT_data_member_location:
+ return "DW_AT_data_member_location";
+ case DW_AT_decl_column:
+ return "DW_AT_decl_column";
+ case DW_AT_decl_file:
+ return "DW_AT_decl_file";
+ case DW_AT_decl_line:
+ return "DW_AT_decl_line";
+ case DW_AT_declaration:
+ return "DW_AT_declaration";
+ case DW_AT_discr_list:
+ return "DW_AT_discr_list";
+ case DW_AT_encoding:
+ return "DW_AT_encoding";
+ case DW_AT_external:
+ return "DW_AT_external";
+ case DW_AT_frame_base:
+ return "DW_AT_frame_base";
+ case DW_AT_friend:
+ return "DW_AT_friend";
+ case DW_AT_identifier_case:
+ return "DW_AT_identifier_case";
+ case DW_AT_macro_info:
+ return "DW_AT_macro_info";
+ case DW_AT_namelist_items:
+ return "DW_AT_namelist_items";
+ case DW_AT_priority:
+ return "DW_AT_priority";
+ case DW_AT_segment:
+ return "DW_AT_segment";
+ case DW_AT_specification:
+ return "DW_AT_specification";
+ case DW_AT_static_link:
+ return "DW_AT_static_link";
+ case DW_AT_type:
+ return "DW_AT_type";
+ case DW_AT_use_location:
+ return "DW_AT_use_location";
+ case DW_AT_variable_parameter:
+ return "DW_AT_variable_parameter";
+ case DW_AT_virtuality:
+ return "DW_AT_virtuality";
+ case DW_AT_vtable_elem_location:
+ return "DW_AT_vtable_elem_location";
+ /* DWARF 3 values. */
+ case DW_AT_allocated:
+ return "DW_AT_allocated";
+ case DW_AT_associated:
+ return "DW_AT_associated";
+ case DW_AT_data_location:
+ return "DW_AT_data_location";
+ case DW_AT_byte_stride:
+ return "DW_AT_byte_stride";
+ case DW_AT_entry_pc:
+ return "DW_AT_entry_pc";
+ case DW_AT_use_UTF8:
+ return "DW_AT_use_UTF8";
+ case DW_AT_extension:
+ return "DW_AT_extension";
+ case DW_AT_ranges:
+ return "DW_AT_ranges";
+ case DW_AT_trampoline:
+ return "DW_AT_trampoline";
+ case DW_AT_call_column:
+ return "DW_AT_call_column";
+ case DW_AT_call_file:
+ return "DW_AT_call_file";
+ case DW_AT_call_line:
+ return "DW_AT_call_line";
+ case DW_AT_description:
+ return "DW_AT_description";
+ case DW_AT_binary_scale:
+ return "DW_AT_binary_scale";
+ case DW_AT_decimal_scale:
+ return "DW_AT_decimal_scale";
+ case DW_AT_small:
+ return "DW_AT_small";
+ case DW_AT_decimal_sign:
+ return "DW_AT_decimal_sign";
+ case DW_AT_digit_count:
+ return "DW_AT_digit_count";
+ case DW_AT_picture_string:
+ return "DW_AT_picture_string";
+ case DW_AT_mutable:
+ return "DW_AT_mutable";
+ case DW_AT_threads_scaled:
+ return "DW_AT_threads_scaled";
+ case DW_AT_explicit:
+ return "DW_AT_explicit";
+ case DW_AT_object_pointer:
+ return "DW_AT_object_pointer";
+ case DW_AT_endianity:
+ return "DW_AT_endianity";
+ case DW_AT_elemental:
+ return "DW_AT_elemental";
+ case DW_AT_pure:
+ return "DW_AT_pure";
+ case DW_AT_recursive:
+ return "DW_AT_recursive";
+ /* DWARF 4 values. */
+ case DW_AT_signature:
+ return "DW_AT_signature";
+ /* SGI/MIPS extensions. */
+#ifdef MIPS /* collides with DW_AT_HP_block_index */
+ case DW_AT_MIPS_fde:
+ return "DW_AT_MIPS_fde";
+#endif
+ case DW_AT_MIPS_loop_begin:
+ return "DW_AT_MIPS_loop_begin";
+ case DW_AT_MIPS_tail_loop_begin:
+ return "DW_AT_MIPS_tail_loop_begin";
+ case DW_AT_MIPS_epilog_begin:
+ return "DW_AT_MIPS_epilog_begin";
+ case DW_AT_MIPS_loop_unroll_factor:
+ return "DW_AT_MIPS_loop_unroll_factor";
+ case DW_AT_MIPS_software_pipeline_depth:
+ return "DW_AT_MIPS_software_pipeline_depth";
+ case DW_AT_MIPS_linkage_name:
+ return "DW_AT_MIPS_linkage_name";
+ case DW_AT_MIPS_stride:
+ return "DW_AT_MIPS_stride";
+ case DW_AT_MIPS_abstract_name:
+ return "DW_AT_MIPS_abstract_name";
+ case DW_AT_MIPS_clone_origin:
+ return "DW_AT_MIPS_clone_origin";
+ case DW_AT_MIPS_has_inlines:
+ return "DW_AT_MIPS_has_inlines";
+ /* HP extensions. */
+#ifndef MIPS /* collides with DW_AT_MIPS_fde */
+ case DW_AT_HP_block_index:
+ return "DW_AT_HP_block_index";
+#endif
+ case DW_AT_HP_unmodifiable:
+ return "DW_AT_HP_unmodifiable";
+ case DW_AT_HP_actuals_stmt_list:
+ return "DW_AT_HP_actuals_stmt_list";
+ case DW_AT_HP_proc_per_section:
+ return "DW_AT_HP_proc_per_section";
+ case DW_AT_HP_raw_data_ptr:
+ return "DW_AT_HP_raw_data_ptr";
+ case DW_AT_HP_pass_by_reference:
+ return "DW_AT_HP_pass_by_reference";
+ case DW_AT_HP_opt_level:
+ return "DW_AT_HP_opt_level";
+ case DW_AT_HP_prof_version_id:
+ return "DW_AT_HP_prof_version_id";
+ case DW_AT_HP_opt_flags:
+ return "DW_AT_HP_opt_flags";
+ case DW_AT_HP_cold_region_low_pc:
+ return "DW_AT_HP_cold_region_low_pc";
+ case DW_AT_HP_cold_region_high_pc:
+ return "DW_AT_HP_cold_region_high_pc";
+ case DW_AT_HP_all_variables_modifiable:
+ return "DW_AT_HP_all_variables_modifiable";
+ case DW_AT_HP_linkage_name:
+ return "DW_AT_HP_linkage_name";
+ case DW_AT_HP_prof_flags:
+ return "DW_AT_HP_prof_flags";
+ /* GNU extensions. */
+ case DW_AT_sf_names:
+ return "DW_AT_sf_names";
+ case DW_AT_src_info:
+ return "DW_AT_src_info";
+ case DW_AT_mac_info:
+ return "DW_AT_mac_info";
+ case DW_AT_src_coords:
+ return "DW_AT_src_coords";
+ case DW_AT_body_begin:
+ return "DW_AT_body_begin";
+ case DW_AT_body_end:
+ return "DW_AT_body_end";
+ case DW_AT_GNU_vector:
+ return "DW_AT_GNU_vector";
+ /* VMS extensions. */
+ case DW_AT_VMS_rtnbeg_pd_address:
+ return "DW_AT_VMS_rtnbeg_pd_address";
+ /* UPC extension. */
+ case DW_AT_upc_threads_scaled:
+ return "DW_AT_upc_threads_scaled";
+ /* PGI (STMicroelectronics) extensions. */
+ case DW_AT_PGI_lbase:
+ return "DW_AT_PGI_lbase";
+ case DW_AT_PGI_soffset:
+ return "DW_AT_PGI_soffset";
+ case DW_AT_PGI_lstride:
+ return "DW_AT_PGI_lstride";
+ default:
+ return "DW_AT_<unknown>";
+ }
+}
+
+/* Convert a DWARF value form code into its string name. */
+
+static char *
+dwarf_form_name (unsigned form)
+{
+ switch (form)
+ {
+ case DW_FORM_addr:
+ return "DW_FORM_addr";
+ case DW_FORM_block2:
+ return "DW_FORM_block2";
+ case DW_FORM_block4:
+ return "DW_FORM_block4";
+ case DW_FORM_data2:
+ return "DW_FORM_data2";
+ case DW_FORM_data4:
+ return "DW_FORM_data4";
+ case DW_FORM_data8:
+ return "DW_FORM_data8";
+ case DW_FORM_string:
+ return "DW_FORM_string";
+ case DW_FORM_block:
+ return "DW_FORM_block";
+ case DW_FORM_block1:
+ return "DW_FORM_block1";
+ case DW_FORM_data1:
+ return "DW_FORM_data1";
+ case DW_FORM_flag:
+ return "DW_FORM_flag";
+ case DW_FORM_sdata:
+ return "DW_FORM_sdata";
+ case DW_FORM_strp:
+ return "DW_FORM_strp";
+ case DW_FORM_udata:
+ return "DW_FORM_udata";
+ case DW_FORM_ref_addr:
+ return "DW_FORM_ref_addr";
+ case DW_FORM_ref1:
+ return "DW_FORM_ref1";
+ case DW_FORM_ref2:
+ return "DW_FORM_ref2";
+ case DW_FORM_ref4:
+ return "DW_FORM_ref4";
+ case DW_FORM_ref8:
+ return "DW_FORM_ref8";
+ case DW_FORM_ref_udata:
+ return "DW_FORM_ref_udata";
+ case DW_FORM_indirect:
+ return "DW_FORM_indirect";
+ case DW_FORM_sec_offset:
+ return "DW_FORM_sec_offset";
+ case DW_FORM_exprloc:
+ return "DW_FORM_exprloc";
+ case DW_FORM_flag_present:
+ return "DW_FORM_flag_present";
+ case DW_FORM_sig8:
+ return "DW_FORM_sig8";
+ default:
+ return "DW_FORM_<unknown>";
+ }
+}
+
+/* Convert a DWARF stack opcode into its string name. */
+
+static char *
+dwarf_stack_op_name (unsigned op)
+{
+ switch (op)
+ {
+ case DW_OP_addr:
+ return "DW_OP_addr";
+ case DW_OP_deref:
+ return "DW_OP_deref";
+ case DW_OP_const1u:
return "DW_OP_const1u";
case DW_OP_const1s:
return "DW_OP_const1s";
return "DW_OP_xderef_size";
case DW_OP_nop:
return "DW_OP_nop";
+ /* DWARF 3 extensions. */
+ case DW_OP_push_object_address:
+ return "DW_OP_push_object_address";
+ case DW_OP_call2:
+ return "DW_OP_call2";
+ case DW_OP_call4:
+ return "DW_OP_call4";
+ case DW_OP_call_ref:
+ return "DW_OP_call_ref";
+ /* GNU extensions. */
+ case DW_OP_form_tls_address:
+ return "DW_OP_form_tls_address";
+ case DW_OP_call_frame_cfa:
+ return "DW_OP_call_frame_cfa";
+ case DW_OP_bit_piece:
+ return "DW_OP_bit_piece";
+ case DW_OP_GNU_push_tls_address:
+ return "DW_OP_GNU_push_tls_address";
+ case DW_OP_GNU_uninit:
+ return "DW_OP_GNU_uninit";
+ /* HP extensions. */
+ case DW_OP_HP_is_value:
+ return "DW_OP_HP_is_value";
+ case DW_OP_HP_fltconst4:
+ return "DW_OP_HP_fltconst4";
+ case DW_OP_HP_fltconst8:
+ return "DW_OP_HP_fltconst8";
+ case DW_OP_HP_mod_range:
+ return "DW_OP_HP_mod_range";
+ case DW_OP_HP_unmod_range:
+ return "DW_OP_HP_unmod_range";
+ case DW_OP_HP_tls:
+ return "DW_OP_HP_tls";
+ default:
+ return "OP_<unknown>";
+ }
+}
+
+static char *
+dwarf_bool_name (unsigned mybool)
+{
+ if (mybool)
+ return "TRUE";
+ else
+ return "FALSE";
+}
+
+/* Convert a DWARF type code into its string name. */
+
+static char *
+dwarf_type_encoding_name (unsigned enc)
+{
+ switch (enc)
+ {
+ case DW_ATE_void:
+ return "DW_ATE_void";
+ case DW_ATE_address:
+ return "DW_ATE_address";
+ case DW_ATE_boolean:
+ return "DW_ATE_boolean";
+ case DW_ATE_complex_float:
+ return "DW_ATE_complex_float";
+ case DW_ATE_float:
+ return "DW_ATE_float";
+ case DW_ATE_signed:
+ return "DW_ATE_signed";
+ case DW_ATE_signed_char:
+ return "DW_ATE_signed_char";
+ case DW_ATE_unsigned:
+ return "DW_ATE_unsigned";
+ case DW_ATE_unsigned_char:
+ return "DW_ATE_unsigned_char";
+ /* DWARF 3. */
+ case DW_ATE_imaginary_float:
+ return "DW_ATE_imaginary_float";
+ case DW_ATE_packed_decimal:
+ return "DW_ATE_packed_decimal";
+ case DW_ATE_numeric_string:
+ return "DW_ATE_numeric_string";
+ case DW_ATE_edited:
+ return "DW_ATE_edited";
+ case DW_ATE_signed_fixed:
+ return "DW_ATE_signed_fixed";
+ case DW_ATE_unsigned_fixed:
+ return "DW_ATE_unsigned_fixed";
+ case DW_ATE_decimal_float:
+ return "DW_ATE_decimal_float";
+ /* HP extensions. */
+ case DW_ATE_HP_float80:
+ return "DW_ATE_HP_float80";
+ case DW_ATE_HP_complex_float80:
+ return "DW_ATE_HP_complex_float80";
+ case DW_ATE_HP_float128:
+ return "DW_ATE_HP_float128";
+ case DW_ATE_HP_complex_float128:
+ return "DW_ATE_HP_complex_float128";
+ case DW_ATE_HP_floathpintel:
+ return "DW_ATE_HP_floathpintel";
+ case DW_ATE_HP_imaginary_float80:
+ return "DW_ATE_HP_imaginary_float80";
+ case DW_ATE_HP_imaginary_float128:
+ return "DW_ATE_HP_imaginary_float128";
+ default:
+ return "DW_ATE_<unknown>";
+ }
+}
+
+/* Convert a DWARF call frame info operation to its string name. */
+
+#if 0
+static char *
+dwarf_cfi_name (unsigned cfi_opc)
+{
+ switch (cfi_opc)
+ {
+ case DW_CFA_advance_loc:
+ return "DW_CFA_advance_loc";
+ case DW_CFA_offset:
+ return "DW_CFA_offset";
+ case DW_CFA_restore:
+ return "DW_CFA_restore";
+ case DW_CFA_nop:
+ return "DW_CFA_nop";
+ case DW_CFA_set_loc:
+ return "DW_CFA_set_loc";
+ case DW_CFA_advance_loc1:
+ return "DW_CFA_advance_loc1";
+ case DW_CFA_advance_loc2:
+ return "DW_CFA_advance_loc2";
+ case DW_CFA_advance_loc4:
+ return "DW_CFA_advance_loc4";
+ case DW_CFA_offset_extended:
+ return "DW_CFA_offset_extended";
+ case DW_CFA_restore_extended:
+ return "DW_CFA_restore_extended";
+ case DW_CFA_undefined:
+ return "DW_CFA_undefined";
+ case DW_CFA_same_value:
+ return "DW_CFA_same_value";
+ case DW_CFA_register:
+ return "DW_CFA_register";
+ case DW_CFA_remember_state:
+ return "DW_CFA_remember_state";
+ case DW_CFA_restore_state:
+ return "DW_CFA_restore_state";
+ case DW_CFA_def_cfa:
+ return "DW_CFA_def_cfa";
+ case DW_CFA_def_cfa_register:
+ return "DW_CFA_def_cfa_register";
+ case DW_CFA_def_cfa_offset:
+ return "DW_CFA_def_cfa_offset";
+ /* DWARF 3. */
+ case DW_CFA_def_cfa_expression:
+ return "DW_CFA_def_cfa_expression";
+ case DW_CFA_expression:
+ return "DW_CFA_expression";
+ case DW_CFA_offset_extended_sf:
+ return "DW_CFA_offset_extended_sf";
+ case DW_CFA_def_cfa_sf:
+ return "DW_CFA_def_cfa_sf";
+ case DW_CFA_def_cfa_offset_sf:
+ return "DW_CFA_def_cfa_offset_sf";
+ case DW_CFA_val_offset:
+ return "DW_CFA_val_offset";
+ case DW_CFA_val_offset_sf:
+ return "DW_CFA_val_offset_sf";
+ case DW_CFA_val_expression:
+ return "DW_CFA_val_expression";
+ /* SGI/MIPS specific. */
+ case DW_CFA_MIPS_advance_loc8:
+ return "DW_CFA_MIPS_advance_loc8";
+ /* GNU extensions. */
+ case DW_CFA_GNU_window_save:
+ return "DW_CFA_GNU_window_save";
+ case DW_CFA_GNU_args_size:
+ return "DW_CFA_GNU_args_size";
+ case DW_CFA_GNU_negative_offset_extended:
+ return "DW_CFA_GNU_negative_offset_extended";
+ default:
+ return "DW_CFA_<unknown>";
+ }
+}
+#endif
+
+static void
+dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
+{
+ unsigned int i;
+
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
+ dwarf_tag_name (die->tag), die->abbrev, die->offset);
+
+ if (die->parent != NULL)
+ {
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, " parent at offset: 0x%x\n",
+ die->parent->offset);
+ }
+
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, " has children: %s\n",
+ dwarf_bool_name (die->child != NULL));
+
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, " attributes:\n");
+
+ for (i = 0; i < die->num_attrs; ++i)
+ {
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, " %s (%s) ",
+ dwarf_attr_name (die->attrs[i].name),
+ dwarf_form_name (die->attrs[i].form));
+
+ switch (die->attrs[i].form)
+ {
+ case DW_FORM_ref_addr:
+ case DW_FORM_addr:
+ fprintf_unfiltered (f, "address: ");
+ fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
+ break;
+ case DW_FORM_block2:
+ case DW_FORM_block4:
+ case DW_FORM_block:
+ case DW_FORM_block1:
+ fprintf_unfiltered (f, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
+ break;
+ case DW_FORM_ref1:
+ case DW_FORM_ref2:
+ case DW_FORM_ref4:
+ fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
+ (long) (DW_ADDR (&die->attrs[i])));
+ break;
+ case DW_FORM_data1:
+ case DW_FORM_data2:
+ case DW_FORM_data4:
+ case DW_FORM_data8:
+ case DW_FORM_udata:
+ case DW_FORM_sdata:
+ fprintf_unfiltered (f, "constant: %s",
+ pulongest (DW_UNSND (&die->attrs[i])));
+ break;
+ case DW_FORM_sig8:
+ if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
+ fprintf_unfiltered (f, "signatured type, offset: 0x%x",
+ DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
+ else
+ fprintf_unfiltered (f, "signatured type, offset: unknown");
+ break;
+ case DW_FORM_string:
+ case DW_FORM_strp:
+ fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
+ DW_STRING (&die->attrs[i])
+ ? DW_STRING (&die->attrs[i]) : "",
+ DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
+ break;
+ case DW_FORM_flag:
+ if (DW_UNSND (&die->attrs[i]))
+ fprintf_unfiltered (f, "flag: TRUE");
+ else
+ fprintf_unfiltered (f, "flag: FALSE");
+ break;
+ case DW_FORM_indirect:
+ /* the reader will have reduced the indirect form to
+ the "base form" so this form should not occur */
+ fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect");
+ break;
+ default:
+ fprintf_unfiltered (f, "unsupported attribute form: %d.",
+ die->attrs[i].form);
+ break;
+ }
+ fprintf_unfiltered (f, "\n");
+ }
+}
+
+static void
+dump_die_for_error (struct die_info *die)
+{
+ dump_die_shallow (gdb_stderr, 0, die);
+}
+
+static void
+dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
+{
+ int indent = level * 4;
+
+ gdb_assert (die != NULL);
+
+ if (level >= max_level)
+ return;
+
+ dump_die_shallow (f, indent, die);
+
+ if (die->child != NULL)
+ {
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, " Children:");
+ if (level + 1 < max_level)
+ {
+ fprintf_unfiltered (f, "\n");
+ dump_die_1 (f, level + 1, max_level, die->child);
+ }
+ else
+ {
+ fprintf_unfiltered (f, " [not printed, max nesting level reached]\n");
+ }
+ }
+
+ if (die->sibling != NULL && level > 0)
+ {
+ dump_die_1 (f, level, max_level, die->sibling);
+ }
+}
+
+/* This is called from the pdie macro in gdbinit.in.
+ It's not static so gcc will keep a copy callable from gdb. */
+
+void
+dump_die (struct die_info *die, int max_level)
+{
+ dump_die_1 (gdb_stdlog, 0, max_level, die);
+}
+
+static void
+store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
+{
+ void **slot;
+
+ slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
+
+ *slot = die;
+}
+
+static int
+is_ref_attr (struct attribute *attr)
+{
+ switch (attr->form)
+ {
+ case DW_FORM_ref_addr:
+ case DW_FORM_ref1:
+ case DW_FORM_ref2:
+ case DW_FORM_ref4:
+ case DW_FORM_ref8:
+ case DW_FORM_ref_udata:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+static unsigned int
+dwarf2_get_ref_die_offset (struct attribute *attr)
+{
+ if (is_ref_attr (attr))
+ return DW_ADDR (attr);
+
+ complaint (&symfile_complaints,
+ _("unsupported die ref attribute form: '%s'"),
+ dwarf_form_name (attr->form));
+ return 0;
+}
+
+/* Return the constant value held by ATTR. Return DEFAULT_VALUE if
+ * the value held by the attribute is not constant. */
+
+static LONGEST
+dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
+{
+ if (attr->form == DW_FORM_sdata)
+ return DW_SND (attr);
+ else if (attr->form == DW_FORM_udata
+ || attr->form == DW_FORM_data1
+ || attr->form == DW_FORM_data2
+ || attr->form == DW_FORM_data4
+ || attr->form == DW_FORM_data8)
+ return DW_UNSND (attr);
+ else
+ {
+ complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
+ dwarf_form_name (attr->form));
+ return default_value;
+ }
+}
+
+/* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
+ unit and add it to our queue.
+ The result is non-zero if PER_CU was queued, otherwise the result is zero
+ meaning either PER_CU is already queued or it is already loaded. */
+
+static int
+maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
+ struct dwarf2_per_cu_data *per_cu)
+{
+ /* Mark the dependence relation so that we don't flush PER_CU
+ too early. */
+ dwarf2_add_dependence (this_cu, per_cu);
+
+ /* If it's already on the queue, we have nothing to do. */
+ if (per_cu->queued)
+ return 0;
+
+ /* If the compilation unit is already loaded, just mark it as
+ used. */
+ if (per_cu->cu != NULL)
+ {
+ per_cu->cu->last_used = 0;
+ return 0;
+ }
+
+ /* Add it to the queue. */
+ queue_comp_unit (per_cu, this_cu->objfile);
+
+ return 1;
+}
+
+/* Follow reference or signature attribute ATTR of SRC_DIE.
+ On entry *REF_CU is the CU of SRC_DIE.
+ On exit *REF_CU is the CU of the result. */
+
+static struct die_info *
+follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
+ struct dwarf2_cu **ref_cu)
+{
+ struct die_info *die;
+
+ if (is_ref_attr (attr))
+ die = follow_die_ref (src_die, attr, ref_cu);
+ else if (attr->form == DW_FORM_sig8)
+ die = follow_die_sig (src_die, attr, ref_cu);
+ else
+ {
+ dump_die_for_error (src_die);
+ error (_("Dwarf Error: Expected reference attribute [in module %s]"),
+ (*ref_cu)->objfile->name);
+ }
+
+ return die;
+}
+
+/* Follow reference attribute ATTR of SRC_DIE.
+ On entry *REF_CU is the CU of SRC_DIE.
+ On exit *REF_CU is the CU of the result. */
+
+static struct die_info *
+follow_die_ref (struct die_info *src_die, struct attribute *attr,
+ struct dwarf2_cu **ref_cu)
+{
+ struct die_info *die;
+ unsigned int offset;
+ struct die_info temp_die;
+ struct dwarf2_cu *target_cu, *cu = *ref_cu;
+
+ gdb_assert (cu->per_cu != NULL);
+
+ offset = dwarf2_get_ref_die_offset (attr);
+
+ if (cu->per_cu->from_debug_types)
+ {
+ /* .debug_types CUs cannot reference anything outside their CU.
+ If they need to, they have to reference a signatured type via
+ DW_FORM_sig8. */
+ if (! offset_in_cu_p (&cu->header, offset))
+ goto not_found;
+ target_cu = cu;
+ }
+ else if (! offset_in_cu_p (&cu->header, offset))
+ {
+ struct dwarf2_per_cu_data *per_cu;
+ per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
+
+ /* If necessary, add it to the queue and load its DIEs. */
+ if (maybe_queue_comp_unit (cu, per_cu))
+ load_full_comp_unit (per_cu, cu->objfile);
+
+ target_cu = per_cu->cu;
+ }
+ else
+ target_cu = cu;
+
+ *ref_cu = target_cu;
+ temp_die.offset = offset;
+ die = htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
+ if (die)
+ return die;
+
+ not_found:
+
+ error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
+ "at 0x%x [in module %s]"),
+ offset, src_die->offset, cu->objfile->name);
+}
+
+/* Follow the signature attribute ATTR in SRC_DIE.
+ On entry *REF_CU is the CU of SRC_DIE.
+ On exit *REF_CU is the CU of the result. */
+
+static struct die_info *
+follow_die_sig (struct die_info *src_die, struct attribute *attr,
+ struct dwarf2_cu **ref_cu)
+{
+ struct objfile *objfile = (*ref_cu)->objfile;
+ struct die_info temp_die;
+ struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
+ struct dwarf2_cu *sig_cu;
+ struct die_info *die;
+
+ /* sig_type will be NULL if the signatured type is missing from
+ the debug info. */
+ if (sig_type == NULL)
+ error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
+ "at 0x%x [in module %s]"),
+ src_die->offset, objfile->name);
+
+ /* If necessary, add it to the queue and load its DIEs. */
+
+ if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
+ read_signatured_type (objfile, sig_type);
+
+ gdb_assert (sig_type->per_cu.cu != NULL);
+
+ sig_cu = sig_type->per_cu.cu;
+ temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
+ die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
+ if (die)
+ {
+ *ref_cu = sig_cu;
+ return die;
+ }
+
+ error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
+ "at 0x%x [in module %s]"),
+ sig_type->type_offset, src_die->offset, objfile->name);
+}
+
+/* Given an offset of a signatured type, return its signatured_type. */
+
+static struct signatured_type *
+lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
+{
+ gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
+ unsigned int length, initial_length_size;
+ unsigned int sig_offset;
+ struct signatured_type find_entry, *type_sig;
+
+ length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
+ sig_offset = (initial_length_size
+ + 2 /*version*/
+ + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
+ + 1 /*address_size*/);
+ find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
+ type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
+
+ /* This is only used to lookup previously recorded types.
+ If we didn't find it, it's our bug. */
+ gdb_assert (type_sig != NULL);
+ gdb_assert (offset == type_sig->offset);
+
+ return type_sig;
+}
+
+/* Read in signatured type at OFFSET and build its CU and die(s). */
+
+static void
+read_signatured_type_at_offset (struct objfile *objfile,
+ unsigned int offset)
+{
+ struct signatured_type *type_sig;
+
+ /* We have the section offset, but we need the signature to do the
+ hash table lookup. */
+ type_sig = lookup_signatured_type_at_offset (objfile, offset);
+
+ gdb_assert (type_sig->per_cu.cu == NULL);
+
+ read_signatured_type (objfile, type_sig);
+
+ gdb_assert (type_sig->per_cu.cu != NULL);
+}
+
+/* Read in a signatured type and build its CU and DIEs. */
+
+static void
+read_signatured_type (struct objfile *objfile,
+ struct signatured_type *type_sig)
+{
+ gdb_byte *types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
+ struct die_reader_specs reader_specs;
+ struct dwarf2_cu *cu;
+ ULONGEST signature;
+ struct cleanup *back_to, *free_cu_cleanup;
+ struct attribute *attr;
+
+ gdb_assert (type_sig->per_cu.cu == NULL);
+
+ cu = xmalloc (sizeof (struct dwarf2_cu));
+ memset (cu, 0, sizeof (struct dwarf2_cu));
+ obstack_init (&cu->comp_unit_obstack);
+ cu->objfile = objfile;
+ type_sig->per_cu.cu = cu;
+ cu->per_cu = &type_sig->per_cu;
+
+ /* If an error occurs while loading, release our storage. */
+ free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
+
+ types_ptr = read_type_comp_unit_head (&cu->header, &signature,
+ types_ptr, objfile->obfd);
+ gdb_assert (signature == type_sig->signature);
+
+ cu->die_hash
+ = htab_create_alloc_ex (cu->header.length / 12,
+ die_hash,
+ die_eq,
+ NULL,
+ &cu->comp_unit_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
+
+ dwarf2_read_abbrevs (cu->objfile->obfd, cu);
+ back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
+
+ init_cu_die_reader (&reader_specs, cu);
+
+ cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
+ NULL /*parent*/);
+
+ /* We try not to read any attributes in this function, because not
+ all objfiles needed for references have been loaded yet, and symbol
+ table processing isn't initialized. But we have to set the CU language,
+ or we won't be able to build types correctly. */
+ attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
+ if (attr)
+ set_cu_language (DW_UNSND (attr), cu);
+ else
+ set_cu_language (language_minimal, cu);
+
+ do_cleanups (back_to);
+
+ /* We've successfully allocated this compilation unit. Let our caller
+ clean it up when finished with it. */
+ discard_cleanups (free_cu_cleanup);
+
+ type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
+ dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
+}
+
+/* Decode simple location descriptions.
+ Given a pointer to a dwarf block that defines a location, compute
+ the location and return the value.
+
+ NOTE drow/2003-11-18: This function is called in two situations
+ now: for the address of static or global variables (partial symbols
+ only) and for offsets into structures which are expected to be
+ (more or less) constant. The partial symbol case should go away,
+ and only the constant case should remain. That will let this
+ function complain more accurately. A few special modes are allowed
+ without complaint for global variables (for instance, global
+ register values and thread-local values).
+
+ A location description containing no operations indicates that the
+ object is optimized out. The return value is 0 for that case.
+ FIXME drow/2003-11-16: No callers check for this case any more; soon all
+ callers will only want a very basic result and this can become a
+ complaint.
+
+ Note that stack[0] is unused except as a default error return.
+ Note that stack overflow is not yet handled. */
+
+static CORE_ADDR
+decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ struct comp_unit_head *cu_header = &cu->header;
+ int i;
+ int size = blk->size;
+ gdb_byte *data = blk->data;
+ CORE_ADDR stack[64];
+ int stacki;
+ unsigned int bytes_read, unsnd;
+ gdb_byte op;
+
+ i = 0;
+ stacki = 0;
+ stack[stacki] = 0;
+
+ while (i < size)
+ {
+ op = data[i++];
+ switch (op)
+ {
+ case DW_OP_lit0:
+ case DW_OP_lit1:
+ case DW_OP_lit2:
+ case DW_OP_lit3:
+ case DW_OP_lit4:
+ case DW_OP_lit5:
+ case DW_OP_lit6:
+ case DW_OP_lit7:
+ case DW_OP_lit8:
+ case DW_OP_lit9:
+ case DW_OP_lit10:
+ case DW_OP_lit11:
+ case DW_OP_lit12:
+ case DW_OP_lit13:
+ case DW_OP_lit14:
+ case DW_OP_lit15:
+ case DW_OP_lit16:
+ case DW_OP_lit17:
+ case DW_OP_lit18:
+ case DW_OP_lit19:
+ case DW_OP_lit20:
+ case DW_OP_lit21:
+ case DW_OP_lit22:
+ case DW_OP_lit23:
+ case DW_OP_lit24:
+ case DW_OP_lit25:
+ case DW_OP_lit26:
+ case DW_OP_lit27:
+ case DW_OP_lit28:
+ case DW_OP_lit29:
+ case DW_OP_lit30:
+ case DW_OP_lit31:
+ stack[++stacki] = op - DW_OP_lit0;
+ break;
+
+ case DW_OP_reg0:
+ case DW_OP_reg1:
+ case DW_OP_reg2:
+ case DW_OP_reg3:
+ case DW_OP_reg4:
+ case DW_OP_reg5:
+ case DW_OP_reg6:
+ case DW_OP_reg7:
+ case DW_OP_reg8:
+ case DW_OP_reg9:
+ case DW_OP_reg10:
+ case DW_OP_reg11:
+ case DW_OP_reg12:
+ case DW_OP_reg13:
+ case DW_OP_reg14:
+ case DW_OP_reg15:
+ case DW_OP_reg16:
+ case DW_OP_reg17:
+ case DW_OP_reg18:
+ case DW_OP_reg19:
+ case DW_OP_reg20:
+ case DW_OP_reg21:
+ case DW_OP_reg22:
+ case DW_OP_reg23:
+ case DW_OP_reg24:
+ case DW_OP_reg25:
+ case DW_OP_reg26:
+ case DW_OP_reg27:
+ case DW_OP_reg28:
+ case DW_OP_reg29:
+ case DW_OP_reg30:
+ case DW_OP_reg31:
+ stack[++stacki] = op - DW_OP_reg0;
+ if (i < size)
+ dwarf2_complex_location_expr_complaint ();
+ break;
+
+ case DW_OP_regx:
+ unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
+ i += bytes_read;
+ stack[++stacki] = unsnd;
+ if (i < size)
+ dwarf2_complex_location_expr_complaint ();
+ break;
+
+ case DW_OP_addr:
+ stack[++stacki] = read_address (objfile->obfd, &data[i],
+ cu, &bytes_read);
+ i += bytes_read;
+ break;
+
+ case DW_OP_const1u:
+ stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
+ i += 1;
+ break;
+
+ case DW_OP_const1s:
+ stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
+ i += 1;
+ break;
+
+ case DW_OP_const2u:
+ stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
+ i += 2;
+ break;
+
+ case DW_OP_const2s:
+ stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
+ i += 2;
+ break;
+
+ case DW_OP_const4u:
+ stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
+ i += 4;
+ break;
+
+ case DW_OP_const4s:
+ stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
+ i += 4;
+ break;
+
+ case DW_OP_constu:
+ stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
+ &bytes_read);
+ i += bytes_read;
+ break;
+
+ case DW_OP_consts:
+ stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
+ i += bytes_read;
+ break;
+
+ case DW_OP_dup:
+ stack[stacki + 1] = stack[stacki];
+ stacki++;
+ break;
+
+ case DW_OP_plus:
+ stack[stacki - 1] += stack[stacki];
+ stacki--;
+ break;
+
+ case DW_OP_plus_uconst:
+ stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
+ i += bytes_read;
+ break;
+
+ case DW_OP_minus:
+ stack[stacki - 1] -= stack[stacki];
+ stacki--;
+ break;
+
+ case DW_OP_deref:
+ /* If we're not the last op, then we definitely can't encode
+ this using GDB's address_class enum. This is valid for partial
+ global symbols, although the variable's address will be bogus
+ in the psymtab. */
+ if (i < size)
+ dwarf2_complex_location_expr_complaint ();
+ break;
+
+ case DW_OP_GNU_push_tls_address:
+ /* The top of the stack has the offset from the beginning
+ of the thread control block at which the variable is located. */
+ /* Nothing should follow this operator, so the top of stack would
+ be returned. */
+ /* This is valid for partial global symbols, but the variable's
+ address will be bogus in the psymtab. */
+ if (i < size)
+ dwarf2_complex_location_expr_complaint ();
+ break;
+
+ case DW_OP_GNU_uninit:
+ break;
+
+ default:
+ complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
+ dwarf_stack_op_name (op));
+ return (stack[stacki]);
+ }
+ }
+ return (stack[stacki]);
+}
+
+/* memory allocation interface */
+
+static struct dwarf_block *
+dwarf_alloc_block (struct dwarf2_cu *cu)
+{
+ struct dwarf_block *blk;
+
+ blk = (struct dwarf_block *)
+ obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
+ return (blk);
+}
+
+static struct abbrev_info *
+dwarf_alloc_abbrev (struct dwarf2_cu *cu)
+{
+ struct abbrev_info *abbrev;
+
+ abbrev = (struct abbrev_info *)
+ obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
+ memset (abbrev, 0, sizeof (struct abbrev_info));
+ return (abbrev);
+}
+
+static struct die_info *
+dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
+{
+ struct die_info *die;
+ size_t size = sizeof (struct die_info);
+
+ if (num_attrs > 1)
+ size += (num_attrs - 1) * sizeof (struct attribute);
+
+ die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
+ memset (die, 0, sizeof (struct die_info));
+ return (die);
+}
+
+\f
+/* Macro support. */
+
+
+/* Return the full name of file number I in *LH's file name table.
+ Use COMP_DIR as the name of the current directory of the
+ compilation. The result is allocated using xmalloc; the caller is
+ responsible for freeing it. */
+static char *
+file_full_name (int file, struct line_header *lh, const char *comp_dir)
+{
+ /* Is the file number a valid index into the line header's file name
+ table? Remember that file numbers start with one, not zero. */
+ if (1 <= file && file <= lh->num_file_names)
+ {
+ struct file_entry *fe = &lh->file_names[file - 1];
+
+ if (IS_ABSOLUTE_PATH (fe->name))
+ return xstrdup (fe->name);
+ else
+ {
+ const char *dir;
+ int dir_len;
+ char *full_name;
+
+ if (fe->dir_index)
+ dir = lh->include_dirs[fe->dir_index - 1];
+ else
+ dir = comp_dir;
+
+ if (dir)
+ {
+ dir_len = strlen (dir);
+ full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
+ strcpy (full_name, dir);
+ full_name[dir_len] = '/';
+ strcpy (full_name + dir_len + 1, fe->name);
+ return full_name;
+ }
+ else
+ return xstrdup (fe->name);
+ }
+ }
+ else
+ {
+ /* The compiler produced a bogus file number. We can at least
+ record the macro definitions made in the file, even if we
+ won't be able to find the file by name. */
+ char fake_name[80];
+ sprintf (fake_name, "<bad macro file number %d>", file);
+
+ complaint (&symfile_complaints,
+ _("bad file number in macro information (%d)"),
+ file);
+
+ return xstrdup (fake_name);
+ }
+}
+
+
+static struct macro_source_file *
+macro_start_file (int file, int line,
+ struct macro_source_file *current_file,
+ const char *comp_dir,
+ struct line_header *lh, struct objfile *objfile)
+{
+ /* The full name of this source file. */
+ char *full_name = file_full_name (file, lh, comp_dir);
+
+ /* We don't create a macro table for this compilation unit
+ at all until we actually get a filename. */
+ if (! pending_macros)
+ pending_macros = new_macro_table (&objfile->objfile_obstack,
+ objfile->macro_cache);
+
+ if (! current_file)
+ /* If we have no current file, then this must be the start_file
+ directive for the compilation unit's main source file. */
+ current_file = macro_set_main (pending_macros, full_name);
+ else
+ current_file = macro_include (current_file, line, full_name);
+
+ xfree (full_name);
+
+ return current_file;
+}
+
+
+/* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
+ followed by a null byte. */
+static char *
+copy_string (const char *buf, int len)
+{
+ char *s = xmalloc (len + 1);
+ memcpy (s, buf, len);
+ s[len] = '\0';
+
+ return s;
+}
+
+
+static const char *
+consume_improper_spaces (const char *p, const char *body)
+{
+ if (*p == ' ')
+ {
+ complaint (&symfile_complaints,
+ _("macro definition contains spaces in formal argument list:\n`%s'"),
+ body);
+
+ while (*p == ' ')
+ p++;
+ }
+
+ return p;
+}
+
+
+static void
+parse_macro_definition (struct macro_source_file *file, int line,
+ const char *body)
+{
+ const char *p;
+
+ /* The body string takes one of two forms. For object-like macro
+ definitions, it should be:
+
+ <macro name> " " <definition>
+
+ For function-like macro definitions, it should be:
+
+ <macro name> "() " <definition>
+ or
+ <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
+
+ Spaces may appear only where explicitly indicated, and in the
+ <definition>.
+
+ The Dwarf 2 spec says that an object-like macro's name is always
+ followed by a space, but versions of GCC around March 2002 omit
+ the space when the macro's definition is the empty string.
+
+ The Dwarf 2 spec says that there should be no spaces between the
+ formal arguments in a function-like macro's formal argument list,
+ but versions of GCC around March 2002 include spaces after the
+ commas. */
+
+
+ /* Find the extent of the macro name. The macro name is terminated
+ by either a space or null character (for an object-like macro) or
+ an opening paren (for a function-like macro). */
+ for (p = body; *p; p++)
+ if (*p == ' ' || *p == '(')
+ break;
+
+ if (*p == ' ' || *p == '\0')
+ {
+ /* It's an object-like macro. */
+ int name_len = p - body;
+ char *name = copy_string (body, name_len);
+ const char *replacement;
+
+ if (*p == ' ')
+ replacement = body + name_len + 1;
+ else
+ {
+ dwarf2_macro_malformed_definition_complaint (body);
+ replacement = body + name_len;
+ }
+
+ macro_define_object (file, line, name, replacement);
+
+ xfree (name);
+ }
+ else if (*p == '(')
+ {
+ /* It's a function-like macro. */
+ char *name = copy_string (body, p - body);
+ int argc = 0;
+ int argv_size = 1;
+ char **argv = xmalloc (argv_size * sizeof (*argv));
+
+ p++;
+
+ p = consume_improper_spaces (p, body);
+
+ /* Parse the formal argument list. */
+ while (*p && *p != ')')
+ {
+ /* Find the extent of the current argument name. */
+ const char *arg_start = p;
+
+ while (*p && *p != ',' && *p != ')' && *p != ' ')
+ p++;
+
+ if (! *p || p == arg_start)
+ dwarf2_macro_malformed_definition_complaint (body);
+ else
+ {
+ /* Make sure argv has room for the new argument. */
+ if (argc >= argv_size)
+ {
+ argv_size *= 2;
+ argv = xrealloc (argv, argv_size * sizeof (*argv));
+ }
+
+ argv[argc++] = copy_string (arg_start, p - arg_start);
+ }
+
+ p = consume_improper_spaces (p, body);
+
+ /* Consume the comma, if present. */
+ if (*p == ',')
+ {
+ p++;
+
+ p = consume_improper_spaces (p, body);
+ }
+ }
+
+ if (*p == ')')
+ {
+ p++;
+
+ if (*p == ' ')
+ /* Perfectly formed definition, no complaints. */
+ macro_define_function (file, line, name,
+ argc, (const char **) argv,
+ p + 1);
+ else if (*p == '\0')
+ {
+ /* Complain, but do define it. */
+ dwarf2_macro_malformed_definition_complaint (body);
+ macro_define_function (file, line, name,
+ argc, (const char **) argv,
+ p);
+ }
+ else
+ /* Just complain. */
+ dwarf2_macro_malformed_definition_complaint (body);
+ }
+ else
+ /* Just complain. */
+ dwarf2_macro_malformed_definition_complaint (body);
+
+ xfree (name);
+ {
+ int i;
+
+ for (i = 0; i < argc; i++)
+ xfree (argv[i]);
+ }
+ xfree (argv);
+ }
+ else
+ dwarf2_macro_malformed_definition_complaint (body);
+}
+
+
+static void
+dwarf_decode_macros (struct line_header *lh, unsigned int offset,
+ char *comp_dir, bfd *abfd,
+ struct dwarf2_cu *cu)
+{
+ gdb_byte *mac_ptr, *mac_end;
+ struct macro_source_file *current_file = 0;
+ enum dwarf_macinfo_record_type macinfo_type;
+ int at_commandline;
+
+ if (dwarf2_per_objfile->macinfo.buffer == NULL)
+ {
+ complaint (&symfile_complaints, _("missing .debug_macinfo section"));
+ return;
+ }
+
+ /* First pass: Find the name of the base filename.
+ This filename is needed in order to process all macros whose definition
+ (or undefinition) comes from the command line. These macros are defined
+ before the first DW_MACINFO_start_file entry, and yet still need to be
+ associated to the base file.
+
+ To determine the base file name, we scan the macro definitions until we
+ reach the first DW_MACINFO_start_file entry. We then initialize
+ CURRENT_FILE accordingly so that any macro definition found before the
+ first DW_MACINFO_start_file can still be associated to the base file. */
+
+ mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
+ mac_end = dwarf2_per_objfile->macinfo.buffer
+ + dwarf2_per_objfile->macinfo.size;
+
+ do
+ {
+ /* Do we at least have room for a macinfo type byte? */
+ if (mac_ptr >= mac_end)
+ {
+ /* Complaint is printed during the second pass as GDB will probably
+ stop the first pass earlier upon finding DW_MACINFO_start_file. */
+ break;
+ }
+
+ macinfo_type = read_1_byte (abfd, mac_ptr);
+ mac_ptr++;
+
+ switch (macinfo_type)
+ {
+ /* A zero macinfo type indicates the end of the macro
+ information. */
+ case 0:
+ break;
+
+ case DW_MACINFO_define:
+ case DW_MACINFO_undef:
+ /* Only skip the data by MAC_PTR. */
+ {
+ unsigned int bytes_read;
+
+ read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ read_string (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ }
+ break;
+
+ case DW_MACINFO_start_file:
+ {
+ unsigned int bytes_read;
+ int line, file;
+
+ line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+
+ current_file = macro_start_file (file, line, current_file, comp_dir,
+ lh, cu->objfile);
+ }
+ break;
+
+ case DW_MACINFO_end_file:
+ /* No data to skip by MAC_PTR. */
+ break;
+
+ case DW_MACINFO_vendor_ext:
+ /* Only skip the data by MAC_PTR. */
+ {
+ unsigned int bytes_read;
+
+ read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ read_string (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ }
+ break;
+
+ default:
+ break;
+ }
+ } while (macinfo_type != 0 && current_file == NULL);
+
+ /* Second pass: Process all entries.
+
+ Use the AT_COMMAND_LINE flag to determine whether we are still processing
+ command-line macro definitions/undefinitions. This flag is unset when we
+ reach the first DW_MACINFO_start_file entry. */
+
+ mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
+
+ /* Determines if GDB is still before first DW_MACINFO_start_file. If true
+ GDB is still reading the definitions from command line. First
+ DW_MACINFO_start_file will need to be ignored as it was already executed
+ to create CURRENT_FILE for the main source holding also the command line
+ definitions. On first met DW_MACINFO_start_file this flag is reset to
+ normally execute all the remaining DW_MACINFO_start_file macinfos. */
+
+ at_commandline = 1;
+
+ do
+ {
+ /* Do we at least have room for a macinfo type byte? */
+ if (mac_ptr >= mac_end)
+ {
+ dwarf2_macros_too_long_complaint ();
+ break;
+ }
+
+ macinfo_type = read_1_byte (abfd, mac_ptr);
+ mac_ptr++;
+
+ switch (macinfo_type)
+ {
+ /* A zero macinfo type indicates the end of the macro
+ information. */
+ case 0:
+ break;
+
+ case DW_MACINFO_define:
+ case DW_MACINFO_undef:
+ {
+ unsigned int bytes_read;
+ int line;
+ char *body;
+
+ line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ body = read_string (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+
+ if (! current_file)
+ {
+ /* DWARF violation as no main source is present. */
+ complaint (&symfile_complaints,
+ _("debug info with no main source gives macro %s "
+ "on line %d: %s"),
+ macinfo_type == DW_MACINFO_define ?
+ _("definition") :
+ macinfo_type == DW_MACINFO_undef ?
+ _("undefinition") :
+ _("something-or-other"), line, body);
+ break;
+ }
+ if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
+ complaint (&symfile_complaints,
+ _("debug info gives %s macro %s with %s line %d: %s"),
+ at_commandline ? _("command-line") : _("in-file"),
+ macinfo_type == DW_MACINFO_define ?
+ _("definition") :
+ macinfo_type == DW_MACINFO_undef ?
+ _("undefinition") :
+ _("something-or-other"),
+ line == 0 ? _("zero") : _("non-zero"), line, body);
+
+ if (macinfo_type == DW_MACINFO_define)
+ parse_macro_definition (current_file, line, body);
+ else if (macinfo_type == DW_MACINFO_undef)
+ macro_undef (current_file, line, body);
+ }
+ break;
+
+ case DW_MACINFO_start_file:
+ {
+ unsigned int bytes_read;
+ int line, file;
+
+ line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+
+ if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
+ complaint (&symfile_complaints,
+ _("debug info gives source %d included "
+ "from %s at %s line %d"),
+ file, at_commandline ? _("command-line") : _("file"),
+ line == 0 ? _("zero") : _("non-zero"), line);
+
+ if (at_commandline)
+ {
+ /* This DW_MACINFO_start_file was executed in the pass one. */
+ at_commandline = 0;
+ }
+ else
+ current_file = macro_start_file (file, line,
+ current_file, comp_dir,
+ lh, cu->objfile);
+ }
+ break;
+
+ case DW_MACINFO_end_file:
+ if (! current_file)
+ complaint (&symfile_complaints,
+ _("macro debug info has an unmatched `close_file' directive"));
+ else
+ {
+ current_file = current_file->included_by;
+ if (! current_file)
+ {
+ enum dwarf_macinfo_record_type next_type;
+
+ /* GCC circa March 2002 doesn't produce the zero
+ type byte marking the end of the compilation
+ unit. Complain if it's not there, but exit no
+ matter what. */
+
+ /* Do we at least have room for a macinfo type byte? */
+ if (mac_ptr >= mac_end)
+ {
+ dwarf2_macros_too_long_complaint ();
+ return;
+ }
+
+ /* We don't increment mac_ptr here, so this is just
+ a look-ahead. */
+ next_type = read_1_byte (abfd, mac_ptr);
+ if (next_type != 0)
+ complaint (&symfile_complaints,
+ _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
+
+ return;
+ }
+ }
+ break;
+
+ case DW_MACINFO_vendor_ext:
+ {
+ unsigned int bytes_read;
+ int constant;
+ char *string;
+
+ constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+ string = read_string (abfd, mac_ptr, &bytes_read);
+ mac_ptr += bytes_read;
+
+ /* We don't recognize any vendor extensions. */
+ }
+ break;
+ }
+ } while (macinfo_type != 0);
+}
+
+/* Check if the attribute's form is a DW_FORM_block*
+ if so return true else false. */
+static int
+attr_form_is_block (struct attribute *attr)
+{
+ return (attr == NULL ? 0 :
+ attr->form == DW_FORM_block1
+ || attr->form == DW_FORM_block2
+ || attr->form == DW_FORM_block4
+ || attr->form == DW_FORM_block);
+}
+
+/* Return non-zero if ATTR's value is a section offset --- classes
+ lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
+ You may use DW_UNSND (attr) to retrieve such offsets.
+
+ Section 7.5.4, "Attribute Encodings", explains that no attribute
+ may have a value that belongs to more than one of these classes; it
+ would be ambiguous if we did, because we use the same forms for all
+ of them. */
+static int
+attr_form_is_section_offset (struct attribute *attr)
+{
+ return (attr->form == DW_FORM_data4
+ || attr->form == DW_FORM_data8);
+}
+
+
+/* Return non-zero if ATTR's value falls in the 'constant' class, or
+ zero otherwise. When this function returns true, you can apply
+ dwarf2_get_attr_constant_value to it.
+
+ However, note that for some attributes you must check
+ attr_form_is_section_offset before using this test. DW_FORM_data4
+ and DW_FORM_data8 are members of both the constant class, and of
+ the classes that contain offsets into other debug sections
+ (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
+ that, if an attribute's can be either a constant or one of the
+ section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
+ taken as section offsets, not constants. */
+static int
+attr_form_is_constant (struct attribute *attr)
+{
+ switch (attr->form)
+ {
+ case DW_FORM_sdata:
+ case DW_FORM_udata:
+ case DW_FORM_data1:
+ case DW_FORM_data2:
+ case DW_FORM_data4:
+ case DW_FORM_data8:
+ return 1;
default:
- return "OP_<unknown>";
+ return 0;
}
}
-static char *
-dwarf_bool_name (unsigned mybool)
+static void
+dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
+ struct dwarf2_cu *cu)
{
- if (mybool)
- return "TRUE";
+ if (attr_form_is_section_offset (attr)
+ /* ".debug_loc" may not exist at all, or the offset may be outside
+ the section. If so, fall through to the complaint in the
+ other branch. */
+ && DW_UNSND (attr) < dwarf2_per_objfile->loc.size)
+ {
+ struct dwarf2_loclist_baton *baton;
+
+ baton = obstack_alloc (&cu->objfile->objfile_obstack,
+ sizeof (struct dwarf2_loclist_baton));
+ baton->per_cu = cu->per_cu;
+ gdb_assert (baton->per_cu);
+
+ /* We don't know how long the location list is, but make sure we
+ don't run off the edge of the section. */
+ baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
+ baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
+ baton->base_address = cu->base_address;
+ if (cu->base_known == 0)
+ complaint (&symfile_complaints,
+ _("Location list used without specifying the CU base address."));
+
+ SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
+ SYMBOL_LOCATION_BATON (sym) = baton;
+ }
else
- return "FALSE";
+ {
+ struct dwarf2_locexpr_baton *baton;
+
+ baton = obstack_alloc (&cu->objfile->objfile_obstack,
+ sizeof (struct dwarf2_locexpr_baton));
+ baton->per_cu = cu->per_cu;
+ gdb_assert (baton->per_cu);
+
+ if (attr_form_is_block (attr))
+ {
+ /* Note that we're just copying the block's data pointer
+ here, not the actual data. We're still pointing into the
+ info_buffer for SYM's objfile; right now we never release
+ that buffer, but when we do clean up properly this may
+ need to change. */
+ baton->size = DW_BLOCK (attr)->size;
+ baton->data = DW_BLOCK (attr)->data;
+ }
+ else
+ {
+ dwarf2_invalid_attrib_class_complaint ("location description",
+ SYMBOL_NATURAL_NAME (sym));
+ baton->size = 0;
+ baton->data = NULL;
+ }
+
+ SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
+ SYMBOL_LOCATION_BATON (sym) = baton;
+ }
}
-/* Convert a DWARF type code into its string name. */
+/* Return the OBJFILE associated with the compilation unit CU. */
-static char *
-dwarf_type_encoding_name (register unsigned enc)
+struct objfile *
+dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
{
- switch (enc)
+ struct objfile *objfile = per_cu->psymtab->objfile;
+
+ /* Return the master objfile, so that we can report and look up the
+ correct file containing this variable. */
+ if (objfile->separate_debug_objfile_backlink)
+ objfile = objfile->separate_debug_objfile_backlink;
+
+ return objfile;
+}
+
+/* Return the address size given in the compilation unit header for CU. */
+
+CORE_ADDR
+dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
+{
+ if (per_cu->cu)
+ return per_cu->cu->header.addr_size;
+ else
{
- case DW_ATE_address:
- return "DW_ATE_address";
- case DW_ATE_boolean:
- return "DW_ATE_boolean";
- case DW_ATE_complex_float:
- return "DW_ATE_complex_float";
- case DW_ATE_float:
- return "DW_ATE_float";
- case DW_ATE_signed:
- return "DW_ATE_signed";
- case DW_ATE_signed_char:
- return "DW_ATE_signed_char";
- case DW_ATE_unsigned:
- return "DW_ATE_unsigned";
- case DW_ATE_unsigned_char:
- return "DW_ATE_unsigned_char";
- default:
- return "DW_ATE_<unknown>";
+ /* If the CU is not currently read in, we re-read its header. */
+ struct objfile *objfile = per_cu->psymtab->objfile;
+ struct dwarf2_per_objfile *per_objfile
+ = objfile_data (objfile, dwarf2_objfile_data_key);
+ gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
+
+ struct comp_unit_head cu_header;
+ memset (&cu_header, 0, sizeof cu_header);
+ read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
+ return cu_header.addr_size;
}
}
-/* Convert a DWARF call frame info operation to its string name. */
+/* Locate the .debug_info compilation unit from CU's objfile which contains
+ the DIE at OFFSET. Raises an error on failure. */
-#if 0
-static char *
-dwarf_cfi_name (register unsigned cfi_opc)
+static struct dwarf2_per_cu_data *
+dwarf2_find_containing_comp_unit (unsigned int offset,
+ struct objfile *objfile)
{
- switch (cfi_opc)
+ struct dwarf2_per_cu_data *this_cu;
+ int low, high;
+
+ low = 0;
+ high = dwarf2_per_objfile->n_comp_units - 1;
+ while (high > low)
{
- case DW_CFA_advance_loc:
- return "DW_CFA_advance_loc";
- case DW_CFA_offset:
- return "DW_CFA_offset";
- case DW_CFA_restore:
- return "DW_CFA_restore";
- case DW_CFA_nop:
- return "DW_CFA_nop";
- case DW_CFA_set_loc:
- return "DW_CFA_set_loc";
- case DW_CFA_advance_loc1:
- return "DW_CFA_advance_loc1";
- case DW_CFA_advance_loc2:
- return "DW_CFA_advance_loc2";
- case DW_CFA_advance_loc4:
- return "DW_CFA_advance_loc4";
- case DW_CFA_offset_extended:
- return "DW_CFA_offset_extended";
- case DW_CFA_restore_extended:
- return "DW_CFA_restore_extended";
- case DW_CFA_undefined:
- return "DW_CFA_undefined";
- case DW_CFA_same_value:
- return "DW_CFA_same_value";
- case DW_CFA_register:
- return "DW_CFA_register";
- case DW_CFA_remember_state:
- return "DW_CFA_remember_state";
- case DW_CFA_restore_state:
- return "DW_CFA_restore_state";
- case DW_CFA_def_cfa:
- return "DW_CFA_def_cfa";
- case DW_CFA_def_cfa_register:
- return "DW_CFA_def_cfa_register";
- case DW_CFA_def_cfa_offset:
- return "DW_CFA_def_cfa_offset";
+ int mid = low + (high - low) / 2;
+ if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
+ high = mid;
+ else
+ low = mid + 1;
+ }
+ gdb_assert (low == high);
+ if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
+ {
+ if (low == 0)
+ error (_("Dwarf Error: could not find partial DIE containing "
+ "offset 0x%lx [in module %s]"),
+ (long) offset, bfd_get_filename (objfile->obfd));
- /* DWARF 3 */
- case DW_CFA_def_cfa_expression:
- return "DW_CFA_def_cfa_expression";
- case DW_CFA_expression:
- return "DW_CFA_expression";
- case DW_CFA_offset_extended_sf:
- return "DW_CFA_offset_extended_sf";
- case DW_CFA_def_cfa_sf:
- return "DW_CFA_def_cfa_sf";
- case DW_CFA_def_cfa_offset_sf:
- return "DW_CFA_def_cfa_offset_sf";
+ gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
+ return dwarf2_per_objfile->all_comp_units[low-1];
+ }
+ else
+ {
+ this_cu = dwarf2_per_objfile->all_comp_units[low];
+ if (low == dwarf2_per_objfile->n_comp_units - 1
+ && offset >= this_cu->offset + this_cu->length)
+ error (_("invalid dwarf2 offset %u"), offset);
+ gdb_assert (offset < this_cu->offset + this_cu->length);
+ return this_cu;
+ }
+}
- /* SGI/MIPS specific */
- case DW_CFA_MIPS_advance_loc8:
- return "DW_CFA_MIPS_advance_loc8";
+/* Locate the compilation unit from OBJFILE which is located at exactly
+ OFFSET. Raises an error on failure. */
- /* GNU extensions */
- case DW_CFA_GNU_window_save:
- return "DW_CFA_GNU_window_save";
- case DW_CFA_GNU_args_size:
- return "DW_CFA_GNU_args_size";
- case DW_CFA_GNU_negative_offset_extended:
- return "DW_CFA_GNU_negative_offset_extended";
+static struct dwarf2_per_cu_data *
+dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
+{
+ struct dwarf2_per_cu_data *this_cu;
+ this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
+ if (this_cu->offset != offset)
+ error (_("no compilation unit with offset %u."), offset);
+ return this_cu;
+}
- default:
- return "DW_CFA_<unknown>";
- }
+/* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
+
+static struct dwarf2_cu *
+alloc_one_comp_unit (struct objfile *objfile)
+{
+ struct dwarf2_cu *cu = xcalloc (1, sizeof (struct dwarf2_cu));
+ cu->objfile = objfile;
+ obstack_init (&cu->comp_unit_obstack);
+ return cu;
}
-#endif
+
+/* Release one cached compilation unit, CU. We unlink it from the tree
+ of compilation units, but we don't remove it from the read_in_chain;
+ the caller is responsible for that.
+ NOTE: DATA is a void * because this function is also used as a
+ cleanup routine. */
static void
-dump_die (struct die_info *die)
+free_one_comp_unit (void *data)
{
- unsigned int i;
+ struct dwarf2_cu *cu = data;
- fprintf_unfiltered (gdb_stderr, "Die: %s (abbrev = %d, offset = %d)\n",
- dwarf_tag_name (die->tag), die->abbrev, die->offset);
- fprintf_unfiltered (gdb_stderr, "\thas children: %s\n",
- dwarf_bool_name (die->has_children));
+ if (cu->per_cu != NULL)
+ cu->per_cu->cu = NULL;
+ cu->per_cu = NULL;
- fprintf_unfiltered (gdb_stderr, "\tattributes:\n");
- for (i = 0; i < die->num_attrs; ++i)
- {
- fprintf_unfiltered (gdb_stderr, "\t\t%s (%s) ",
- dwarf_attr_name (die->attrs[i].name),
- dwarf_form_name (die->attrs[i].form));
- switch (die->attrs[i].form)
- {
- case DW_FORM_ref_addr:
- case DW_FORM_addr:
- fprintf_unfiltered (gdb_stderr, "address: ");
- print_address_numeric (DW_ADDR (&die->attrs[i]), 1, gdb_stderr);
- break;
- case DW_FORM_block2:
- case DW_FORM_block4:
- case DW_FORM_block:
- case DW_FORM_block1:
- fprintf_unfiltered (gdb_stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
- break;
- case DW_FORM_data1:
- case DW_FORM_data2:
- case DW_FORM_data4:
- case DW_FORM_data8:
- case DW_FORM_ref1:
- case DW_FORM_ref2:
- case DW_FORM_ref4:
- case DW_FORM_udata:
- case DW_FORM_sdata:
- fprintf_unfiltered (gdb_stderr, "constant: %ld", DW_UNSND (&die->attrs[i]));
- break;
- case DW_FORM_string:
- case DW_FORM_strp:
- fprintf_unfiltered (gdb_stderr, "string: \"%s\"",
- DW_STRING (&die->attrs[i])
- ? DW_STRING (&die->attrs[i]) : "");
- break;
- case DW_FORM_flag:
- if (DW_UNSND (&die->attrs[i]))
- fprintf_unfiltered (gdb_stderr, "flag: TRUE");
- else
- fprintf_unfiltered (gdb_stderr, "flag: FALSE");
- break;
- case DW_FORM_indirect:
- /* the reader will have reduced the indirect form to
- the "base form" so this form should not occur */
- fprintf_unfiltered (gdb_stderr, "unexpected attribute form: DW_FORM_indirect");
- break;
- default:
- fprintf_unfiltered (gdb_stderr, "unsupported attribute form: %d.",
- die->attrs[i].form);
- }
- fprintf_unfiltered (gdb_stderr, "\n");
- }
+ obstack_free (&cu->comp_unit_obstack, NULL);
+
+ xfree (cu);
}
+/* This cleanup function is passed the address of a dwarf2_cu on the stack
+ when we're finished with it. We can't free the pointer itself, but be
+ sure to unlink it from the cache. Also release any associated storage
+ and perform cache maintenance.
+
+ Only used during partial symbol parsing. */
+
static void
-dump_die_list (struct die_info *die)
+free_stack_comp_unit (void *data)
{
- while (die)
+ struct dwarf2_cu *cu = data;
+
+ obstack_free (&cu->comp_unit_obstack, NULL);
+ cu->partial_dies = NULL;
+
+ if (cu->per_cu != NULL)
{
- dump_die (die);
- die = die->next;
+ /* This compilation unit is on the stack in our caller, so we
+ should not xfree it. Just unlink it. */
+ cu->per_cu->cu = NULL;
+ cu->per_cu = NULL;
+
+ /* If we had a per-cu pointer, then we may have other compilation
+ units loaded, so age them now. */
+ age_cached_comp_units ();
}
}
+/* Free all cached compilation units. */
+
static void
-store_in_ref_table (unsigned int offset, struct die_info *die)
+free_cached_comp_units (void *data)
{
- int h;
- struct die_info *old;
+ struct dwarf2_per_cu_data *per_cu, **last_chain;
+
+ per_cu = dwarf2_per_objfile->read_in_chain;
+ last_chain = &dwarf2_per_objfile->read_in_chain;
+ while (per_cu != NULL)
+ {
+ struct dwarf2_per_cu_data *next_cu;
+
+ next_cu = per_cu->cu->read_in_chain;
- h = (offset % REF_HASH_SIZE);
- old = die_ref_table[h];
- die->next_ref = old;
- die_ref_table[h] = die;
+ free_one_comp_unit (per_cu->cu);
+ *last_chain = next_cu;
+
+ per_cu = next_cu;
+ }
}
+/* Increase the age counter on each cached compilation unit, and free
+ any that are too old. */
static void
-dwarf2_empty_hash_tables (void)
+age_cached_comp_units (void)
{
- memset (die_ref_table, 0, sizeof (die_ref_table));
-}
+ struct dwarf2_per_cu_data *per_cu, **last_chain;
-static unsigned int
-dwarf2_get_ref_die_offset (struct attribute *attr)
-{
- unsigned int result = 0;
+ dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
+ per_cu = dwarf2_per_objfile->read_in_chain;
+ while (per_cu != NULL)
+ {
+ per_cu->cu->last_used ++;
+ if (per_cu->cu->last_used <= dwarf2_max_cache_age)
+ dwarf2_mark (per_cu->cu);
+ per_cu = per_cu->cu->read_in_chain;
+ }
- switch (attr->form)
+ per_cu = dwarf2_per_objfile->read_in_chain;
+ last_chain = &dwarf2_per_objfile->read_in_chain;
+ while (per_cu != NULL)
{
- case DW_FORM_ref_addr:
- result = DW_ADDR (attr);
- break;
- case DW_FORM_ref1:
- case DW_FORM_ref2:
- case DW_FORM_ref4:
- case DW_FORM_ref8:
- case DW_FORM_ref_udata:
- result = cu_header_offset + DW_UNSND (attr);
- break;
- default:
- complain (&dwarf2_unsupported_die_ref_attr, dwarf_form_name (attr->form));
+ struct dwarf2_per_cu_data *next_cu;
+
+ next_cu = per_cu->cu->read_in_chain;
+
+ if (!per_cu->cu->mark)
+ {
+ free_one_comp_unit (per_cu->cu);
+ *last_chain = next_cu;
+ }
+ else
+ last_chain = &per_cu->cu->read_in_chain;
+
+ per_cu = next_cu;
}
- return result;
}
-static struct die_info *
-follow_die_ref (unsigned int offset)
+/* Remove a single compilation unit from the cache. */
+
+static void
+free_one_cached_comp_unit (void *target_cu)
{
- struct die_info *die;
- int h;
+ struct dwarf2_per_cu_data *per_cu, **last_chain;
- h = (offset % REF_HASH_SIZE);
- die = die_ref_table[h];
- while (die)
+ per_cu = dwarf2_per_objfile->read_in_chain;
+ last_chain = &dwarf2_per_objfile->read_in_chain;
+ while (per_cu != NULL)
{
- if (die->offset == offset)
+ struct dwarf2_per_cu_data *next_cu;
+
+ next_cu = per_cu->cu->read_in_chain;
+
+ if (per_cu->cu == target_cu)
{
- return die;
+ free_one_comp_unit (per_cu->cu);
+ *last_chain = next_cu;
+ break;
}
- die = die->next_ref;
+ else
+ last_chain = &per_cu->cu->read_in_chain;
+
+ per_cu = next_cu;
}
- return NULL;
}
-static struct type *
-dwarf2_fundamental_type (struct objfile *objfile, int typeid)
+/* Release all extra memory associated with OBJFILE. */
+
+void
+dwarf2_free_objfile (struct objfile *objfile)
{
- if (typeid < 0 || typeid >= FT_NUM_MEMBERS)
- {
- error ("Dwarf Error: internal error - invalid fundamental type id %d.",
- typeid);
- }
+ dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
- /* Look for this particular type in the fundamental type vector. If
- one is not found, create and install one appropriate for the
- current language and the current target machine. */
+ if (dwarf2_per_objfile == NULL)
+ return;
- if (ftypes[typeid] == NULL)
- {
- ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid);
- }
+ /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
+ free_cached_comp_units (NULL);
- return (ftypes[typeid]);
+ /* Everything else should be on the objfile obstack. */
}
-/* Decode simple location descriptions.
- Given a pointer to a dwarf block that defines a location, compute
- the location and return the value.
+/* A pair of DIE offset and GDB type pointer. We store these
+ in a hash table separate from the DIEs, and preserve them
+ when the DIEs are flushed out of cache. */
- FIXME: This is a kludge until we figure out a better
- way to handle the location descriptions.
- Gdb's design does not mesh well with the DWARF2 notion of a location
- computing interpreter, which is a shame because the flexibility goes unused.
- FIXME: Implement more operations as necessary.
+struct dwarf2_offset_and_type
+{
+ unsigned int offset;
+ struct type *type;
+};
- A location description containing no operations indicates that the
- object is optimized out. The global optimized_out flag is set for
- those, the return value is meaningless.
+/* Hash function for a dwarf2_offset_and_type. */
- When the result is a register number, the global isreg flag is set,
- otherwise it is cleared.
+static hashval_t
+offset_and_type_hash (const void *item)
+{
+ const struct dwarf2_offset_and_type *ofs = item;
+ return ofs->offset;
+}
- When the result is a base register offset, the global offreg flag is set
- and the register number is returned in basereg, otherwise it is cleared.
+/* Equality function for a dwarf2_offset_and_type. */
- When the DW_OP_fbreg operation is encountered without a corresponding
- DW_AT_frame_base attribute, the global islocal flag is set.
- Hopefully the machine dependent code knows how to set up a virtual
- frame pointer for the local references.
+static int
+offset_and_type_eq (const void *item_lhs, const void *item_rhs)
+{
+ const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
+ const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
+ return ofs_lhs->offset == ofs_rhs->offset;
+}
- Note that stack[0] is unused except as a default error return.
- Note that stack overflow is not yet handled. */
+/* Set the type associated with DIE to TYPE. Save it in CU's hash
+ table if necessary. For convenience, return TYPE. */
-static CORE_ADDR
-decode_locdesc (struct dwarf_block *blk, struct objfile *objfile,
- const struct comp_unit_head *cu_header)
+static struct type *
+set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
{
- int i;
- int size = blk->size;
- char *data = blk->data;
- CORE_ADDR stack[64];
- int stacki;
- unsigned int bytes_read, unsnd;
- unsigned char op;
-
- i = 0;
- stacki = 0;
- stack[stacki] = 0;
- isreg = 0;
- offreg = 0;
- isderef = 0;
- islocal = 0;
- optimized_out = 1;
+ struct dwarf2_offset_and_type **slot, ofs;
+
+ if (cu->type_hash == NULL)
+ {
+ gdb_assert (cu->per_cu != NULL);
+ cu->per_cu->type_hash
+ = htab_create_alloc_ex (cu->header.length / 24,
+ offset_and_type_hash,
+ offset_and_type_eq,
+ NULL,
+ &cu->objfile->objfile_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
+ cu->type_hash = cu->per_cu->type_hash;
+ }
+
+ ofs.offset = die->offset;
+ ofs.type = type;
+ slot = (struct dwarf2_offset_and_type **)
+ htab_find_slot_with_hash (cu->type_hash, &ofs, ofs.offset, INSERT);
+ *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot));
+ **slot = ofs;
+ return type;
+}
- while (i < size)
- {
- optimized_out = 0;
- op = data[i++];
- switch (op)
- {
- case DW_OP_lit0:
- case DW_OP_lit1:
- case DW_OP_lit2:
- case DW_OP_lit3:
- case DW_OP_lit4:
- case DW_OP_lit5:
- case DW_OP_lit6:
- case DW_OP_lit7:
- case DW_OP_lit8:
- case DW_OP_lit9:
- case DW_OP_lit10:
- case DW_OP_lit11:
- case DW_OP_lit12:
- case DW_OP_lit13:
- case DW_OP_lit14:
- case DW_OP_lit15:
- case DW_OP_lit16:
- case DW_OP_lit17:
- case DW_OP_lit18:
- case DW_OP_lit19:
- case DW_OP_lit20:
- case DW_OP_lit21:
- case DW_OP_lit22:
- case DW_OP_lit23:
- case DW_OP_lit24:
- case DW_OP_lit25:
- case DW_OP_lit26:
- case DW_OP_lit27:
- case DW_OP_lit28:
- case DW_OP_lit29:
- case DW_OP_lit30:
- case DW_OP_lit31:
- stack[++stacki] = op - DW_OP_lit0;
- break;
+/* Find the type for DIE in CU's type_hash, or return NULL if DIE does
+ not have a saved type. */
- case DW_OP_reg0:
- case DW_OP_reg1:
- case DW_OP_reg2:
- case DW_OP_reg3:
- case DW_OP_reg4:
- case DW_OP_reg5:
- case DW_OP_reg6:
- case DW_OP_reg7:
- case DW_OP_reg8:
- case DW_OP_reg9:
- case DW_OP_reg10:
- case DW_OP_reg11:
- case DW_OP_reg12:
- case DW_OP_reg13:
- case DW_OP_reg14:
- case DW_OP_reg15:
- case DW_OP_reg16:
- case DW_OP_reg17:
- case DW_OP_reg18:
- case DW_OP_reg19:
- case DW_OP_reg20:
- case DW_OP_reg21:
- case DW_OP_reg22:
- case DW_OP_reg23:
- case DW_OP_reg24:
- case DW_OP_reg25:
- case DW_OP_reg26:
- case DW_OP_reg27:
- case DW_OP_reg28:
- case DW_OP_reg29:
- case DW_OP_reg30:
- case DW_OP_reg31:
- isreg = 1;
- stack[++stacki] = op - DW_OP_reg0;
- break;
+static struct type *
+get_die_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct dwarf2_offset_and_type *slot, ofs;
+ htab_t type_hash = cu->type_hash;
- case DW_OP_regx:
- isreg = 1;
- unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
- i += bytes_read;
-#if defined(HARRIS_TARGET) && defined(_M88K)
- /* The Harris 88110 gdb ports have long kept their special reg
- numbers between their gp-regs and their x-regs. This is
- not how our dwarf is generated. Punt. */
- unsnd += 6;
-#endif
- stack[++stacki] = unsnd;
- break;
+ if (type_hash == NULL)
+ return NULL;
- case DW_OP_breg0:
- case DW_OP_breg1:
- case DW_OP_breg2:
- case DW_OP_breg3:
- case DW_OP_breg4:
- case DW_OP_breg5:
- case DW_OP_breg6:
- case DW_OP_breg7:
- case DW_OP_breg8:
- case DW_OP_breg9:
- case DW_OP_breg10:
- case DW_OP_breg11:
- case DW_OP_breg12:
- case DW_OP_breg13:
- case DW_OP_breg14:
- case DW_OP_breg15:
- case DW_OP_breg16:
- case DW_OP_breg17:
- case DW_OP_breg18:
- case DW_OP_breg19:
- case DW_OP_breg20:
- case DW_OP_breg21:
- case DW_OP_breg22:
- case DW_OP_breg23:
- case DW_OP_breg24:
- case DW_OP_breg25:
- case DW_OP_breg26:
- case DW_OP_breg27:
- case DW_OP_breg28:
- case DW_OP_breg29:
- case DW_OP_breg30:
- case DW_OP_breg31:
- offreg = 1;
- basereg = op - DW_OP_breg0;
- stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
- i += bytes_read;
- break;
+ ofs.offset = die->offset;
+ slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
+ if (slot)
+ return slot->type;
+ else
+ return NULL;
+}
- case DW_OP_bregx:
- offreg = 1;
- basereg = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
- i += bytes_read;
- stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
- i += bytes_read;
- break;
+/* Add a dependence relationship from CU to REF_PER_CU. */
- case DW_OP_fbreg:
- stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
- i += bytes_read;
- if (frame_base_reg >= 0)
- {
- offreg = 1;
- basereg = frame_base_reg;
- stack[stacki] += frame_base_offset;
- }
- else
- {
- complain (&dwarf2_missing_at_frame_base);
- islocal = 1;
- }
- break;
+static void
+dwarf2_add_dependence (struct dwarf2_cu *cu,
+ struct dwarf2_per_cu_data *ref_per_cu)
+{
+ void **slot;
+
+ if (cu->dependencies == NULL)
+ cu->dependencies
+ = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
+ NULL, &cu->comp_unit_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
+
+ slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
+ if (*slot == NULL)
+ *slot = ref_per_cu;
+}
- case DW_OP_addr:
- stack[++stacki] = read_address (objfile->obfd, &data[i],
- cu_header, &bytes_read);
- i += bytes_read;
- break;
+/* Subroutine of dwarf2_mark to pass to htab_traverse.
+ Set the mark field in every compilation unit in the
+ cache that we must keep because we are keeping CU. */
- case DW_OP_const1u:
- stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
- i += 1;
- break;
+static int
+dwarf2_mark_helper (void **slot, void *data)
+{
+ struct dwarf2_per_cu_data *per_cu;
- case DW_OP_const1s:
- stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
- i += 1;
- break;
+ per_cu = (struct dwarf2_per_cu_data *) *slot;
+ if (per_cu->cu->mark)
+ return 1;
+ per_cu->cu->mark = 1;
- case DW_OP_const2u:
- stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
- i += 2;
- break;
+ if (per_cu->cu->dependencies != NULL)
+ htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
- case DW_OP_const2s:
- stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
- i += 2;
- break;
+ return 1;
+}
- case DW_OP_const4u:
- stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
- i += 4;
- break;
+/* Set the mark field in CU and in every other compilation unit in the
+ cache that we must keep because we are keeping CU. */
- case DW_OP_const4s:
- stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
- i += 4;
- break;
+static void
+dwarf2_mark (struct dwarf2_cu *cu)
+{
+ if (cu->mark)
+ return;
+ cu->mark = 1;
+ if (cu->dependencies != NULL)
+ htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
+}
- case DW_OP_constu:
- stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
- &bytes_read);
- i += bytes_read;
- break;
+static void
+dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
+{
+ while (per_cu)
+ {
+ per_cu->cu->mark = 0;
+ per_cu = per_cu->cu->read_in_chain;
+ }
+}
- case DW_OP_consts:
- stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
- i += bytes_read;
- break;
+/* Trivial hash function for partial_die_info: the hash value of a DIE
+ is its offset in .debug_info for this objfile. */
- case DW_OP_dup:
- stack[stacki + 1] = stack[stacki];
- stacki++;
- break;
+static hashval_t
+partial_die_hash (const void *item)
+{
+ const struct partial_die_info *part_die = item;
+ return part_die->offset;
+}
- case DW_OP_plus:
- stack[stacki - 1] += stack[stacki];
- stacki--;
- break;
+/* Trivial comparison function for partial_die_info structures: two DIEs
+ are equal if they have the same offset. */
- case DW_OP_plus_uconst:
- stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
- i += bytes_read;
- break;
+static int
+partial_die_eq (const void *item_lhs, const void *item_rhs)
+{
+ const struct partial_die_info *part_die_lhs = item_lhs;
+ const struct partial_die_info *part_die_rhs = item_rhs;
+ return part_die_lhs->offset == part_die_rhs->offset;
+}
- case DW_OP_minus:
- stack[stacki - 1] -= stack[stacki];
- stacki--;
- break;
+static struct cmd_list_element *set_dwarf2_cmdlist;
+static struct cmd_list_element *show_dwarf2_cmdlist;
- case DW_OP_deref:
- isderef = 1;
- /* If we're not the last op, then we definitely can't encode
- this using GDB's address_class enum. */
- if (i < size)
- complain (&dwarf2_complex_location_expr);
- break;
+static void
+set_dwarf2_cmd (char *args, int from_tty)
+{
+ help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
+}
- default:
- complain (&dwarf2_unsupported_stack_op, dwarf_stack_op_name (op));
- return (stack[stacki]);
- }
- }
- return (stack[stacki]);
+static void
+show_dwarf2_cmd (char *args, int from_tty)
+{
+ cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
}
-/* memory allocation interface */
+/* If section described by INFO was mmapped, munmap it now. */
-/* ARGSUSED */
static void
-dwarf2_free_tmp_obstack (PTR ignore)
+munmap_section_buffer (struct dwarf2_section_info *info)
{
- obstack_free (&dwarf2_tmp_obstack, NULL);
+ if (info->was_mmapped)
+ {
+#ifdef HAVE_MMAP
+ intptr_t begin = (intptr_t) info->buffer;
+ intptr_t map_begin = begin & ~(pagesize - 1);
+ size_t map_length = info->size + begin - map_begin;
+ gdb_assert (munmap ((void *) map_begin, map_length) == 0);
+#else
+ /* Without HAVE_MMAP, we should never be here to begin with. */
+ gdb_assert (0);
+#endif
+ }
}
-static struct dwarf_block *
-dwarf_alloc_block (void)
-{
- struct dwarf_block *blk;
-
- blk = (struct dwarf_block *)
- obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct dwarf_block));
- return (blk);
-}
+/* munmap debug sections for OBJFILE, if necessary. */
-static struct abbrev_info *
-dwarf_alloc_abbrev (void)
+static void
+dwarf2_per_objfile_free (struct objfile *objfile, void *d)
{
- struct abbrev_info *abbrev;
-
- abbrev = (struct abbrev_info *) xmalloc (sizeof (struct abbrev_info));
- memset (abbrev, 0, sizeof (struct abbrev_info));
- return (abbrev);
+ struct dwarf2_per_objfile *data = d;
+ munmap_section_buffer (&data->info);
+ munmap_section_buffer (&data->abbrev);
+ munmap_section_buffer (&data->line);
+ munmap_section_buffer (&data->str);
+ munmap_section_buffer (&data->macinfo);
+ munmap_section_buffer (&data->ranges);
+ munmap_section_buffer (&data->loc);
+ munmap_section_buffer (&data->frame);
+ munmap_section_buffer (&data->eh_frame);
}
-static struct die_info *
-dwarf_alloc_die (void)
-{
- struct die_info *die;
+void _initialize_dwarf2_read (void);
- die = (struct die_info *) xmalloc (sizeof (struct die_info));
- memset (die, 0, sizeof (struct die_info));
- return (die);
+void
+_initialize_dwarf2_read (void)
+{
+ dwarf2_objfile_data_key
+ = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
+
+ add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
+Set DWARF 2 specific variables.\n\
+Configure DWARF 2 variables such as the cache size"),
+ &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
+ 0/*allow-unknown*/, &maintenance_set_cmdlist);
+
+ add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
+Show DWARF 2 specific variables\n\
+Show DWARF 2 variables such as the cache size"),
+ &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
+ 0/*allow-unknown*/, &maintenance_show_cmdlist);
+
+ add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
+ &dwarf2_max_cache_age, _("\
+Set the upper bound on the age of cached dwarf2 compilation units."), _("\
+Show the upper bound on the age of cached dwarf2 compilation units."), _("\
+A higher limit means that cached compilation units will be stored\n\
+in memory longer, and more total memory will be used. Zero disables\n\
+caching, which can slow down startup."),
+ NULL,
+ show_dwarf2_max_cache_age,
+ &set_dwarf2_cmdlist,
+ &show_dwarf2_cmdlist);
+
+ add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
+Set debugging of the dwarf2 DIE reader."), _("\
+Show debugging of the dwarf2 DIE reader."), _("\
+When enabled (non-zero), DIEs are dumped after they are read in.\n\
+The value is the maximum depth to print."),
+ NULL,
+ NULL,
+ &setdebuglist, &showdebuglist);
}
projects / deliverable / binutils-gdb.git / blobdiff