/* DWARF 2 debugging format support for GDB.
Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
- 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+ 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
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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "bfd.h"
#include "hashtab.h"
#include "command.h"
#include "gdbcmd.h"
+#include "addrmap.h"
#include <fcntl.h>
#include "gdb_string.h"
#include "gdb_assert.h"
#include <sys/types.h>
+#ifdef HAVE_ZLIB_H
+#include <zlib.h>
+#endif
/* A note on memory usage for this file.
can be used for any other data associated to the objfile (symbol
names, type names, location expressions to name a few). */
-#ifndef DWARF2_REG_TO_REGNUM
-#define DWARF2_REG_TO_REGNUM(REG) (REG)
-#endif
-
#if 0
/* .debug_info header for a compilation unit
Because of alignment constraints, this structure has padding and cannot
}
_STATEMENT_PROLOGUE;
+/* When non-zero, dump DIEs after they are read in. */
+static int dwarf2_die_debug = 0;
+
+/* 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_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 RANGES_SECTION ".debug_ranges"
-#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 FRAME_SECTION "debug_frame"
+#define EH_FRAME_SECTION "eh_frame"
/* local data types */
translation, looks like this. */
struct comp_unit_head
{
- unsigned long length;
+ unsigned int length;
short version;
- unsigned int abbrev_offset;
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;
.debug_info section, for resolving relative reference dies. */
unsigned int offset;
- /* Pointer to this compilation unit header in the .debug_info
- section. */
- gdb_byte *cu_head_ptr;
-
- /* Pointer to the first die of this compilation unit. This will be
- the first byte following the compilation unit header. */
- gdb_byte *first_die_ptr;
-
- /* Pointer to the next compilation unit header in the program. */
- struct comp_unit_head *next;
-
- /* Base address of this compilation unit. */
- CORE_ADDR base_address;
-
- /* Non-zero if base_address has been set. */
- int base_known;
+ /* 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;
};
-/* Fixed size for the DIE hash table. */
-#ifndef REF_HASH_SIZE
-#define REF_HASH_SIZE 1021
-#endif
-
/* 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.
-
- FIXME drow/2003-11-10: Some of the things from the comp_unit_head
- should logically be moved to the dwarf2_cu structure. */
+ /* 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. */
distinguish these in buildsym.c. */
struct pending **list_in_scope;
- /* 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. */
- struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */
-
/* DWARF abbreviation table associated with this compilation unit. */
struct abbrev_info **dwarf2_abbrevs;
/* Hash table holding all the loaded partial DIEs. */
htab_t partial_dies;
+ /* `.debug_ranges' offset for this `DW_TAG_compile_unit' DIE. */
+ unsigned int ranges_offset;
+
/* Storage for things with the same lifetime as this read-in compilation
unit, including partial DIEs. */
struct obstack comp_unit_obstack;
/* 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. */
- struct die_info *die_ref_table[REF_HASH_SIZE];
+ htab_t die_hash;
/* Full DIEs if read in. */
struct die_info *dies;
DIEs for namespaces, we don't need to try to infer them
from mangled names. */
unsigned int has_namespace_info : 1;
+
+ /* Field `ranges_offset' is filled in; flag as the value may be zero. */
+ unsigned int has_ranges_offset : 1;
};
/* Persistent data held for a compilation unit, even when not
{
/* The start offset and length of this compilation unit. 2**30-1
bytes should suffice to store the length of any compilation unit
- - if it doesn't, GDB will fall over anyway. */
- unsigned long offset;
- unsigned long length : 30;
+ - 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 : 30;
/* Flag indicating this compilation unit will be read in before
any of the current compilation units are processed. */
- unsigned long queued : 1;
+ 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
struct attr_abbrev
{
- enum dwarf_attribute name;
- enum dwarf_form form;
+ ENUM_BITFIELD(dwarf_attribute) name : 16;
+ ENUM_BITFIELD(dwarf_form) form : 16;
};
-/* This data structure holds a complete die structure. */
-struct die_info
+/* Additional GDB-specific attribute forms. */
+enum
{
- enum dwarf_tag tag; /* Tag indicating type of die */
- 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 */
-
- /* 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. */
-
- struct type *type; /* Cached type information */
+ /* A string which has been updated to GDB's internal
+ representation (e.g. converted to canonical form) and does not
+ need to be updated again. */
+ GDB_FORM_cached_string = 0xff
};
/* 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 : 16;
union
{
char *str;
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 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;
_("statement list doesn't fit in .debug_line section"));
}
+static void
+dwarf2_debug_line_missing_file_complaint (void)
+{
+ complaint (&symfile_complaints,
+ _(".debug_line section has line data without a file"));
+}
+
+static void
+dwarf2_debug_line_missing_end_sequence_complaint (void)
+{
+ complaint (&symfile_complaints,
+ _(".debug_line section has line program sequence without an end"));
+}
+
static void
dwarf2_complex_location_expr_complaint (void)
{
static void scan_partial_symbols (struct partial_die_info *,
CORE_ADDR *, CORE_ADDR *,
- struct dwarf2_cu *);
+ int, struct dwarf2_cu *);
static void add_partial_symbol (struct partial_die_info *,
struct dwarf2_cu *);
static void add_partial_namespace (struct partial_die_info *pdi,
CORE_ADDR *lowpc, CORE_ADDR *highpc,
- struct dwarf2_cu *cu);
+ 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 *info_ptr,
bfd *abfd,
struct abbrev_info *abbrev, unsigned int,
bfd *, gdb_byte *, struct dwarf2_cu *);
-static struct partial_die_info *find_partial_die (unsigned long,
+static struct partial_die_info *find_partial_die (unsigned int,
struct dwarf2_cu *);
static void fixup_partial_die (struct partial_die_info *,
static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
unsigned int *);
-static LONGEST read_initial_length (bfd *, gdb_byte *,
- struct comp_unit_head *, unsigned int *);
+static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
+
+static LONGEST read_checked_initial_length_and_offset
+ (bfd *, gdb_byte *, const struct comp_unit_head *,
+ unsigned int *, unsigned int *);
static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
- unsigned int *);
+ unsigned int *);
+
+static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
static struct die_info *die_specification (struct die_info *die,
- struct dwarf2_cu *);
+ struct dwarf2_cu **);
static void free_line_header (struct line_header *lh);
static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
-static void read_type_die (struct die_info *, struct dwarf2_cu *);
+static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
const char *suffix,
struct dwarf2_cu *);
-static void read_typedef (struct die_info *, struct dwarf2_cu *);
-
-static void read_base_type (struct die_info *, struct dwarf2_cu *);
-
-static void read_subrange_type (struct die_info *die, struct dwarf2_cu *cu);
-
static void read_file_scope (struct die_info *, struct dwarf2_cu *);
static void read_func_scope (struct die_info *, struct dwarf2_cu *);
static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
+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 dwarf2_cu *);
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 dwarf2_cu *);
static void dwarf2_attach_fn_fields_to_type (struct field_info *,
struct type *, struct dwarf2_cu *);
-static void read_structure_type (struct die_info *, struct dwarf2_cu *);
-
static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
-static char *determine_class_name (struct die_info *die, struct dwarf2_cu *cu);
+static const char *determine_class_name (struct die_info *die,
+ struct dwarf2_cu *cu);
static void read_common_block (struct die_info *, struct dwarf2_cu *);
static void read_namespace (struct die_info *die, struct dwarf2_cu *);
+static void read_module (struct die_info *die, struct dwarf2_cu *cu);
+
static const char *namespace_name (struct die_info *die,
int *is_anonymous, struct dwarf2_cu *);
-static void read_enumeration_type (struct die_info *, struct dwarf2_cu *);
-
static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
-static struct type *dwarf_base_type (int, int, struct dwarf2_cu *);
-
static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
-static void read_array_type (struct die_info *, struct dwarf2_cu *);
-
static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
struct dwarf2_cu *);
-static void read_tag_pointer_type (struct die_info *, struct dwarf2_cu *);
-
-static void read_tag_ptr_to_member_type (struct die_info *,
- struct dwarf2_cu *);
-
-static void read_tag_reference_type (struct die_info *, struct dwarf2_cu *);
-
-static void read_tag_const_type (struct die_info *, struct dwarf2_cu *);
-
-static void read_tag_volatile_type (struct die_info *, struct dwarf2_cu *);
-
-static void read_tag_string_type (struct die_info *, struct dwarf2_cu *);
-
-static void read_subroutine_type (struct die_info *, struct dwarf2_cu *);
-
static struct die_info *read_comp_unit (gdb_byte *, bfd *, struct dwarf2_cu *);
+static struct die_info *read_die_and_children_1 (gdb_byte *info_ptr, bfd *abfd,
+ struct dwarf2_cu *,
+ gdb_byte **new_info_ptr,
+ struct die_info *parent);
+
static struct die_info *read_die_and_children (gdb_byte *info_ptr, bfd *abfd,
struct dwarf2_cu *,
gdb_byte **new_info_ptr,
gdb_byte **new_info_ptr,
struct die_info *parent);
-static void free_die_list (struct die_info *);
-
static void process_die (struct die_info *, struct dwarf2_cu *);
static char *dwarf2_linkage_name (struct die_info *, struct dwarf2_cu *);
+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 *);
+ 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_1 (struct ui_file *, int level, int max_level,
+ struct die_info *);
-static void dump_die_list (struct die_info *);
+/*static*/ void dump_die (struct die_info *, int max_level);
-static void store_in_ref_table (unsigned int, struct die_info *,
+static void store_in_ref_table (struct die_info *,
struct dwarf2_cu *);
-static unsigned int dwarf2_get_ref_die_offset (struct attribute *,
- struct dwarf2_cu *);
+static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
static int dwarf2_get_attr_constant_value (struct attribute *, int);
static struct die_info *follow_die_ref (struct die_info *,
struct attribute *,
- struct dwarf2_cu *);
-
-static struct type *dwarf2_fundamental_type (struct objfile *, int,
- struct dwarf2_cu *);
+ struct dwarf2_cu **);
/* memory allocation interface */
static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
-static struct die_info *dwarf_alloc_die (void);
+static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
static void initialize_cu_func_list (struct dwarf2_cu *);
static int attr_form_is_block (struct attribute *);
-static void
-dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
- struct dwarf2_cu *cu);
+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 *info_ptr, struct abbrev_info *abbrev,
struct dwarf2_cu *cu);
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 long offset, struct objfile *objfile);
+ (unsigned int offset, struct objfile *objfile);
static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
- (unsigned long offset, struct objfile *objfile);
+ (unsigned int offset, struct objfile *objfile);
static void free_one_comp_unit (void *);
static void free_one_cached_comp_unit (void *);
-static void set_die_type (struct die_info *, struct type *,
- struct dwarf2_cu *);
-
-static void reset_die_and_siblings_types (struct die_info *,
- struct dwarf2_cu *);
+static struct type *set_die_type (struct die_info *, struct type *,
+ struct dwarf2_cu *);
static void create_all_comp_units (struct objfile *);
static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
-static void read_set_type (struct die_info *, struct dwarf2_cu *);
-
+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. */
return (dwarf_info_section != NULL && dwarf_abbrev_section != NULL);
}
+/* When loading sections, we can either look for ".<name>", or for
+ * ".z<name>", which indicates a compressed section. */
+
+static int
+section_is_p (asection *sectp, const char *name)
+{
+ return ((sectp->name[0] == '.'
+ && strcmp (sectp->name + 1, name) == 0)
+ || (sectp->name[0] == '.' && sectp->name[1] == 'z'
+ && strcmp (sectp->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 *abfd, asection *sectp, void *ignore_ptr)
{
- if (strcmp (sectp->name, INFO_SECTION) == 0)
+ if (section_is_p (sectp, INFO_SECTION))
{
dwarf2_per_objfile->info_size = bfd_get_section_size (sectp);
dwarf_info_section = sectp;
}
- else if (strcmp (sectp->name, ABBREV_SECTION) == 0)
+ else if (section_is_p (sectp, ABBREV_SECTION))
{
dwarf2_per_objfile->abbrev_size = bfd_get_section_size (sectp);
dwarf_abbrev_section = sectp;
}
- else if (strcmp (sectp->name, LINE_SECTION) == 0)
+ else if (section_is_p (sectp, LINE_SECTION))
{
dwarf2_per_objfile->line_size = bfd_get_section_size (sectp);
dwarf_line_section = sectp;
}
- else if (strcmp (sectp->name, PUBNAMES_SECTION) == 0)
+ else if (section_is_p (sectp, PUBNAMES_SECTION))
{
dwarf2_per_objfile->pubnames_size = bfd_get_section_size (sectp);
dwarf_pubnames_section = sectp;
}
- else if (strcmp (sectp->name, ARANGES_SECTION) == 0)
+ else if (section_is_p (sectp, ARANGES_SECTION))
{
dwarf2_per_objfile->aranges_size = bfd_get_section_size (sectp);
dwarf_aranges_section = sectp;
}
- else if (strcmp (sectp->name, LOC_SECTION) == 0)
+ else if (section_is_p (sectp, LOC_SECTION))
{
dwarf2_per_objfile->loc_size = bfd_get_section_size (sectp);
dwarf_loc_section = sectp;
}
- else if (strcmp (sectp->name, MACINFO_SECTION) == 0)
+ else if (section_is_p (sectp, MACINFO_SECTION))
{
dwarf2_per_objfile->macinfo_size = bfd_get_section_size (sectp);
dwarf_macinfo_section = sectp;
}
- else if (strcmp (sectp->name, STR_SECTION) == 0)
+ else if (section_is_p (sectp, STR_SECTION))
{
dwarf2_per_objfile->str_size = bfd_get_section_size (sectp);
dwarf_str_section = sectp;
}
- else if (strcmp (sectp->name, FRAME_SECTION) == 0)
+ else if (section_is_p (sectp, FRAME_SECTION))
{
dwarf2_per_objfile->frame_size = bfd_get_section_size (sectp);
dwarf_frame_section = sectp;
}
- else if (strcmp (sectp->name, EH_FRAME_SECTION) == 0)
+ else if (section_is_p (sectp, EH_FRAME_SECTION))
{
flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
if (aflag & SEC_HAS_CONTENTS)
dwarf_eh_frame_section = sectp;
}
}
- else if (strcmp (sectp->name, RANGES_SECTION) == 0)
+ else if (section_is_p (sectp, RANGES_SECTION))
{
dwarf2_per_objfile->ranges_size = bfd_get_section_size (sectp);
dwarf_ranges_section = sectp;
dwarf2_per_objfile->has_section_at_zero = 1;
}
+/* This function is called after decompressing a section, so
+ dwarf2_per_objfile can record its new, uncompressed size. */
+
+static void
+dwarf2_resize_section (asection *sectp, bfd_size_type new_size)
+{
+ if (section_is_p (sectp, INFO_SECTION))
+ dwarf2_per_objfile->info_size = new_size;
+ else if (section_is_p (sectp, ABBREV_SECTION))
+ dwarf2_per_objfile->abbrev_size = new_size;
+ else if (section_is_p (sectp, LINE_SECTION))
+ dwarf2_per_objfile->line_size = new_size;
+ else if (section_is_p (sectp, PUBNAMES_SECTION))
+ dwarf2_per_objfile->pubnames_size = new_size;
+ else if (section_is_p (sectp, ARANGES_SECTION))
+ dwarf2_per_objfile->aranges_size = new_size;
+ else if (section_is_p (sectp, LOC_SECTION))
+ dwarf2_per_objfile->loc_size = new_size;
+ else if (section_is_p (sectp, MACINFO_SECTION))
+ dwarf2_per_objfile->macinfo_size = new_size;
+ else if (section_is_p (sectp, STR_SECTION))
+ dwarf2_per_objfile->str_size = new_size;
+ else if (section_is_p (sectp, FRAME_SECTION))
+ dwarf2_per_objfile->frame_size = new_size;
+ else if (section_is_p (sectp, EH_FRAME_SECTION))
+ dwarf2_per_objfile->eh_frame_size = new_size;
+ else if (section_is_p (sectp, RANGES_SECTION))
+ dwarf2_per_objfile->ranges_size = new_size;
+ else
+ internal_error (__FILE__, __LINE__,
+ _("dwarf2_resize_section: missing section_is_p check: %s"),
+ sectp->name);
+}
+
/* Build a partial symbol table. */
void
pubnames_ptr = pubnames_buffer;
while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames_size)
{
- struct comp_unit_head cu_header;
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;
}
#endif
+/* Return TRUE if OFFSET is within CU_HEADER. */
+
+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. */
{
int signed_addr;
unsigned int bytes_read;
- cu_header->length = read_initial_length (abfd, info_ptr, cu_header,
- &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;
internal_error (__FILE__, __LINE__,
_("read_comp_unit_head: dwarf from non elf file"));
cu_header->signed_addr_p = signed_addr;
+
return info_ptr;
}
struct partial_die_info comp_unit_die;
struct partial_symtab *pst;
struct cleanup *back_to;
- CORE_ADDR lowpc, highpc, baseaddr;
+ CORE_ADDR baseaddr;
info_ptr = dwarf2_per_objfile->info_buffer;
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
/* Complete the cu_header */
cu.header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
- cu.header.first_die_ptr = info_ptr;
- cu.header.cu_head_ptr = beg_of_comp_unit;
+ cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
cu.list_in_scope = &file_symbols;
/* 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,
+ /* TEXTLOW and TEXTHIGH are set below. */
+ 0,
objfile->global_psymbols.next,
objfile->static_psymbols.next);
if (comp_unit_die.dirname)
- pst->dirname = xstrdup (comp_unit_die.dirname);
+ pst->dirname = obsavestring (comp_unit_die.dirname,
+ strlen (comp_unit_die.dirname),
+ &objfile->objfile_obstack);
pst->read_symtab_private = (char *) this_cu;
this_cu->psymtab = pst;
+ /* Possibly set the default values of LOWPC and HIGHPC from
+ `DW_AT_ranges'. */
+ if (cu.has_ranges_offset)
+ {
+ if (dwarf2_ranges_read (cu.ranges_offset, &comp_unit_die.lowpc,
+ &comp_unit_die.highpc, &cu, pst))
+ comp_unit_die.has_pc_info = 1;
+ }
+ else if (comp_unit_die.has_pc_info
+ && comp_unit_die.lowpc < comp_unit_die.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,
+ comp_unit_die.lowpc + baseaddr,
+ comp_unit_die.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 (comp_unit_die.has_children)
{
struct partial_die_info *first_die;
+ CORE_ADDR lowpc, highpc;
lowpc = ((CORE_ADDR) -1);
highpc = ((CORE_ADDR) 0);
first_die = load_partial_dies (abfd, info_ptr, 1, &cu);
- scan_partial_symbols (first_die, &lowpc, &highpc, &cu);
+ scan_partial_symbols (first_die, &lowpc, &highpc,
+ ! comp_unit_die.has_pc_info, &cu);
/* If we didn't find a lowpc, set it to highpc to avoid
complaints from `maint check'. */
do_cleanups (back_to_inner);
}
+
+ objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
+ &objfile->objfile_obstack);
+
do_cleanups (back_to);
}
/* Complete the cu_header. */
cu->header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
- cu->header.first_die_ptr = info_ptr;
- cu->header.cu_head_ptr = beg_of_comp_unit;
+ 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);
/* Link this compilation unit into the compilation unit tree. */
this_cu->cu = cu;
cu->per_cu = this_cu;
+ cu->type_hash = cu->per_cu->type_hash;
/* Check if comp unit has_children.
If so, read the rest of the partial symbols from this comp unit.
while (info_ptr < dwarf2_per_objfile->info_buffer + dwarf2_per_objfile->info_size)
{
- struct comp_unit_head cu_header;
+ unsigned int length, initial_length_size;
gdb_byte *beg_of_comp_unit;
struct dwarf2_per_cu_data *this_cu;
- unsigned long offset;
- unsigned int bytes_read;
+ unsigned int offset;
offset = info_ptr - dwarf2_per_objfile->info_buffer;
/* Read just enough information to find out where the next
compilation unit is. */
- cu_header.initial_length_size = 0;
- cu_header.length = read_initial_length (objfile->obfd, info_ptr,
- &cu_header, &bytes_read);
+ 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 = cu_header.length + cu_header.initial_length_size;
+ this_cu->length = length + initial_length_size;
if (n_comp_units == n_allocated)
{
dwarf2_per_objfile->n_comp_units = n_comp_units;
}
-/* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE.
- Also set *LOWPC and *HIGHPC to the lowest and highest PC values found
- in CU. */
+/* 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, struct dwarf2_cu *cu)
+ CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
bfd *abfd = objfile->obfd;
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_declaration)
- {
- add_partial_symbol (pdi, cu);
- }
- }
+ add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
break;
case DW_TAG_variable:
case DW_TAG_typedef:
}
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_namespace:
- add_partial_namespace (pdi, lowpc, highpc, cu);
+ 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 (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)
{
struct objfile *objfile = cu->objfile;
CORE_ADDR addr = 0;
- char *actual_name;
+ char *actual_name = NULL;
const char *my_prefix;
const struct partial_symbol *psym = NULL;
CORE_ADDR baseaddr;
baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- actual_name = NULL;
-
if (pdi_needs_namespace (pdi->tag))
{
actual_name = partial_die_full_name (pdi, cu);
switch (pdi->tag)
{
case DW_TAG_subprogram:
- if (pdi->is_external)
+ 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),
{
/* Static Variable. Skip symbols without location descriptors. */
if (pdi->locdesc == NULL)
- return;
+ {
+ 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); */
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:
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)
- return;
+ {
+ if (built_actual_name)
+ xfree (actual_name);
+ return;
+ }
/* NOTE: carlton/2003-10-07: See comment in new_symbol about
static vs. global. */
: &objfile->static_psymbols,
0, (CORE_ADDR) 0, cu->language, objfile);
- if (cu->language == language_cplus
- || cu->language == language_java
- || cu->language == language_ada)
- {
- /* For C++ and Java, these implicitly act as typedefs as well. */
- add_psymbol_to_list (actual_name, strlen (actual_name),
- VAR_DOMAIN, LOC_TYPEDEF,
- &objfile->global_psymbols,
- 0, (CORE_ADDR) 0, cu->language, objfile);
- }
break;
case DW_TAG_enumerator:
add_psymbol_to_list (actual_name, strlen (actual_name),
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:
static void
add_partial_namespace (struct partial_die_info *pdi,
CORE_ADDR *lowpc, CORE_ADDR *highpc,
- struct dwarf2_cu *cu)
+ int need_pc, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
/* Now scan partial symbols in that namespace. */
if (pdi->has_children)
- scan_partial_symbols (pdi->die_child, lowpc, highpc, cu);
+ scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
+}
+
+/* Read a partial die corresponding to a Fortran module. */
+
+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.
+
+ FIXME: Support the separate Fortran module namespaces. */
+
+ if (pdi->has_children)
+ scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
+}
+
+/* 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. */
+
+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)
+ {
+ if (pdi->has_pc_info)
+ {
+ if (pdi->lowpc < *lowpc)
+ *lowpc = pdi->lowpc;
+ if (pdi->highpc > *highpc)
+ *highpc = pdi->highpc;
+ if (need_pc)
+ {
+ 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);
+ }
+ }
+
+ if (! pdi->has_children)
+ return;
+
+ if (cu->language == language_ada)
+ {
+ 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;
+ }
+ }
}
/* See if we can figure out if the class lives in a namespace. We do
complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
else
return dwarf2_per_objfile->info_buffer
- + dwarf2_get_ref_die_offset (&attr, cu);
+ + dwarf2_get_ref_die_offset (&attr);
}
/* If it isn't DW_AT_sibling, skip this attribute. */
/* Add PER_CU to the queue. */
static void
-queue_comp_unit (struct dwarf2_per_cu_data *per_cu)
+queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
{
struct dwarf2_queue_item *item;
dwarf2_queue_tail->next = item;
dwarf2_queue_tail = item;
+
+ /* Either PER_CU is the CU we want to process, or we're following a reference
+ pointing into PER_CU. Either way, we need its DIEs now. */
+ load_full_comp_unit (item->per_cu, objfile);
+ item->per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
+ dwarf2_per_objfile->read_in_chain = item->per_cu;
}
/* Process the queue. */
{
struct dwarf2_queue_item *item, *next_item;
- /* Initially, there is just one item on the queue. Load its DIEs,
- and the DIEs of any other compilation units it requires,
- transitively. */
-
- for (item = dwarf2_queue; item != NULL; item = item->next)
- {
- /* Read in this compilation unit. This may add new items to
- the end of the queue. */
- load_full_comp_unit (item->per_cu, objfile);
-
- item->per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
- dwarf2_per_objfile->read_in_chain = item->per_cu;
-
- /* If this compilation unit has already had full symbols created,
- reset the TYPE fields in each DIE. */
- if (item->per_cu->type_hash)
- reset_die_and_siblings_types (item->per_cu->cu->dies,
- item->per_cu->cu);
- }
-
- /* Now everything left on the queue needs to be read in. Process
- them, one at a time, removing from the queue as we finish. */
+ /* 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)
back_to = make_cleanup (dwarf2_release_queue, NULL);
- queue_comp_unit (per_cu);
+ queue_comp_unit (per_cu, pst->objfile);
process_queue (pst->objfile);
{
bfd *abfd = objfile->obfd;
struct dwarf2_cu *cu;
- unsigned long offset;
+ unsigned int offset;
gdb_byte *info_ptr;
struct cleanup *back_to, *free_cu_cleanup;
struct attribute *attr;
cu->per_cu = per_cu;
per_cu->cu = cu;
+ cu->type_hash = per_cu->type_hash;
/* We use this obstack for block values in dwarf_alloc_block. */
obstack_init (&cu->comp_unit_obstack);
baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
- /* We're in the global namespace. */
- processing_current_prefix = "";
-
buildsym_init ();
back_to = make_cleanup (really_free_pendings, NULL);
DW_AT_entry_pc. It's been removed, but GCC still uses this for
compilation units with discontinuous ranges. */
- cu->header.base_known = 0;
- cu->header.base_address = 0;
+ cu->base_known = 0;
+ cu->base_address = 0;
attr = dwarf2_attr (cu->dies, DW_AT_entry_pc, cu);
if (attr)
{
- cu->header.base_address = DW_ADDR (attr);
- cu->header.base_known = 1;
+ cu->base_address = DW_ADDR (attr);
+ cu->base_known = 1;
}
else
{
attr = dwarf2_attr (cu->dies, DW_AT_low_pc, cu);
if (attr)
{
- cu->header.base_address = DW_ADDR (attr);
- cu->header.base_known = 1;
+ cu->base_address = DW_ADDR (attr);
+ cu->base_known = 1;
}
}
read_file_scope (die, cu);
break;
case DW_TAG_subprogram:
- read_subroutine_type (die, cu);
read_func_scope (die, cu);
break;
case DW_TAG_inlined_subroutine:
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:
- read_structure_type (die, cu);
process_structure_scope (die, cu);
break;
case DW_TAG_enumeration_type:
- read_enumeration_type (die, cu);
process_enumeration_scope (die, cu);
break;
- /* FIXME drow/2004-03-14: These initialize die->type, but do not create
- a symbol or process any children. Therefore it doesn't do anything
- that won't be done on-demand by read_type_die. */
+ /* 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:
- read_subroutine_type (die, cu);
- break;
case DW_TAG_set_type:
- read_set_type (die, cu);
- break;
case DW_TAG_array_type:
- read_array_type (die, cu);
- break;
case DW_TAG_pointer_type:
- read_tag_pointer_type (die, cu);
- break;
case DW_TAG_ptr_to_member_type:
- read_tag_ptr_to_member_type (die, cu);
- break;
case DW_TAG_reference_type:
- read_tag_reference_type (die, cu);
- break;
case DW_TAG_string_type:
- read_tag_string_type (die, cu);
break;
- /* END FIXME */
case DW_TAG_base_type:
- read_base_type (die, cu);
- /* Add a typedef symbol for the type definition, if it has a
- DW_AT_name. */
- new_symbol (die, die->type, cu);
- break;
case DW_TAG_subrange_type:
- read_subrange_type (die, cu);
+ case DW_TAG_typedef:
/* Add a typedef symbol for the type definition, if it has a
DW_AT_name. */
- new_symbol (die, die->type, cu);
+ new_symbol (die, read_type_die (die, cu), cu);
break;
case DW_TAG_common_block:
read_common_block (die, cu);
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:
/* FIXME: carlton/2002-10-16: Eventually, we should use the
information contained in these. DW_TAG_imported_declaration
dies shouldn't have children; DW_TAG_imported_module dies
shouldn't in the C++ case, but conceivably could in the
- Fortran case, so we'll have to replace this gdb_assert if
- Fortran compilers start generating that info. */
+ Fortran case. */
processing_has_namespace_info = 1;
- gdb_assert (die->child == NULL);
+ complaint (&symfile_complaints, _("unsupported tag: '%s'"),
+ dwarf_tag_name (die->tag));
break;
default:
new_symbol (die, NULL, cu);
}
}
+/* 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. */
+
+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;
+
+ name = dwarf2_name (die, cu);
+ if (!name)
+ return NULL;
+
+ /* 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;
+}
+
static void
initialize_cu_func_list (struct dwarf2_cu *cu)
{
CORE_ADDR lowpc = ((CORE_ADDR) -1);
CORE_ADDR highpc = ((CORE_ADDR) 0);
struct attribute *attr;
- char *name = "<unknown>";
+ char *name = NULL;
char *comp_dir = NULL;
struct die_info *child_die;
bfd *abfd = objfile->obfd;
lowpc += baseaddr;
highpc += baseaddr;
+ /* 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);
}
+
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 = 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, ':');
+ comp_dir = ldirname (name);
+ if (comp_dir != NULL)
+ make_cleanup (xfree, comp_dir);
+ }
+ if (comp_dir != NULL)
+ {
+ /* 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;
- }
+ if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
+ comp_dir = cp + 1;
}
+ if (name == NULL)
+ name = "<unknown>";
+
attr = dwarf2_attr (die, DW_AT_language, cu);
if (attr)
{
/* We assume that we're processing GCC output. */
processing_gcc_compilation = 2;
- /* The compilation unit may be in a different language or objfile,
- zero out all remembered fundamental types. */
- memset (cu->ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *));
+ processing_has_namespace_info = 0;
start_symtab (name, comp_dir, lowpc);
record_debugformat ("DWARF 2");
struct die_info *child_die;
struct attribute *attr;
char *name;
- const char *previous_prefix = processing_current_prefix;
- struct cleanup *back_to = NULL;
CORE_ADDR baseaddr;
+ struct block *block;
baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
return;
- if (cu->language == language_cplus
- || cu->language == language_java)
- {
- struct die_info *spec_die = die_specification (die, cu);
-
- /* NOTE: carlton/2004-01-23: 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. */
-
- if (spec_die != NULL)
- {
- char *specification_prefix = determine_prefix (spec_die, cu);
- processing_current_prefix = specification_prefix;
- back_to = make_cleanup (xfree, specification_prefix);
- }
- }
-
lowpc += baseaddr;
highpc += baseaddr;
add_to_cu_func_list (name, lowpc, highpc, cu);
new = push_context (0, lowpc);
- new->name = new_symbol (die, die->type, cu);
+ new->name = new_symbol (die, read_type_die (die, cu), cu);
/* If there is a location expression for DW_AT_frame_base, record
it. */
new = pop_context ();
/* Make a block for the local symbols within. */
- finish_block (new->name, &local_symbols, new->old_blocks,
- lowpc, highpc, objfile);
+ 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
symbols go in the file symbol list. */
if (outermost_context_p ())
cu->list_in_scope = &file_symbols;
-
- processing_current_prefix = previous_prefix;
- if (back_to != NULL)
- do_cleanups (back_to);
}
/* Process all the DIES contained within a lexical block scope. Start
if (local_symbols != NULL)
{
- finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
- highpc, objfile);
+ struct block *block
+ = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
+ highpc, objfile);
+
+ /* 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.
+
+ 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;
}
-/* 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. */
+/* 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_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
- CORE_ADDR *highpc, struct dwarf2_cu *cu)
+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;
- struct attribute *attr;
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;
- int ret = 0;
+ CORE_ADDR baseaddr;
- attr = dwarf2_attr (die, DW_AT_high_pc, cu);
+ 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;
+ }
+ buffer = dwarf2_per_objfile->ranges_buffer + offset;
+
+ /* Read in the largest possible address. */
+ marker = read_address (obfd, buffer, cu, &dummy);
+ if ((marker & mask) == mask)
+ {
+ /* 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;
+ }
+
+ low_set = 0;
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ while (1)
+ {
+ CORE_ADDR range_beginning, range_end;
+
+ 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;
+
+ /* 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;
+
+ /* 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;
+ }
+
+ 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;
+ }
+
+ 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;
+ }
+ }
+
+ 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 attribute *attr;
+ CORE_ADDR low = 0;
+ CORE_ADDR high = 0;
+ int ret = 0;
+
+ attr = dwarf2_attr (die, DW_AT_high_pc, cu);
if (attr)
{
high = DW_ADDR (attr);
attr = dwarf2_attr (die, DW_AT_ranges, cu);
if (attr != NULL)
{
- unsigned int addr_size = cu_header->addr_size;
- CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
/* Value of the DW_AT_ranges attribute is the offset in the
.debug_ranges section. */
- unsigned int offset = DW_UNSND (attr);
- /* Base address selection entry. */
- CORE_ADDR base;
- int found_base;
- unsigned int dummy;
- gdb_byte *buffer;
- CORE_ADDR marker;
- int low_set;
-
- found_base = cu_header->base_known;
- base = cu_header->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;
- }
- buffer = dwarf2_per_objfile->ranges_buffer + offset;
-
- /* Read in the largest possible address. */
- marker = read_address (obfd, buffer, cu, &dummy);
- if ((marker & mask) == mask)
- {
- /* 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;
- }
-
- low_set = 0;
-
- while (1)
- {
- CORE_ADDR range_beginning, range_end;
-
- 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;
-
- /* 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;
-
- /* 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;
- }
-
- 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;
- }
-
- range_beginning += base;
- range_end += base;
-
- /* 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;
- }
- }
-
- if (! low_set)
- /* If the first entry is an end-of-list marker, the range
- describes an empty scope, i.e. no instructions. */
+ if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, NULL))
return 0;
-
+ /* Found discontinuous range of addresses. */
ret = -1;
}
}
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
+dwarf2_get_subprogram_pc_bounds (struct die_info *die,
+ CORE_ADDR *lowpc, CORE_ADDR *highpc,
+ struct dwarf2_cu *cu)
+{
+ CORE_ADDR low, high;
+ struct die_info *child = die->child;
+
+ if (dwarf2_get_pc_bounds (die, &low, &high, cu))
+ {
+ *lowpc = min (*lowpc, low);
+ *highpc = max (*highpc, high);
+ }
+
+ /* 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. */
{
switch (child->tag) {
case DW_TAG_subprogram:
- if (dwarf2_get_pc_bounds (child, ¤t_low, ¤t_high, cu))
- {
- best_low = min (best_low, current_low);
- best_high = max (best_high, current_high);
- }
+ 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
*highpc = best_high;
}
+/* Record the address ranges for BLOCK, offset by BASEADDR, as given
+ in DIE. */
+static void
+dwarf2_record_block_ranges (struct die_info *die, struct block *block,
+ CORE_ADDR baseaddr, struct dwarf2_cu *cu)
+{
+ struct attribute *attr;
+
+ attr = dwarf2_attr (die, DW_AT_high_pc, cu);
+ if (attr)
+ {
+ 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 = dwarf2_attr (die, DW_AT_ranges, cu);
+ 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)
+ {
+ complaint (&symfile_complaints,
+ _("Offset %lu out of bounds for DW_AT_ranges attribute"),
+ offset);
+ return;
+ }
+
+ for (;;)
+ {
+ 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);
+ }
+ }
+ }
+}
+
/* Add an aggregate field to the field list. */
static void
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;
/* Get type of field. */
fp->type = die_type (die, cu);
- FIELD_STATIC_KIND (*fp) = 0;
+ SET_FIELD_BITPOS (*fp, 0);
/* Get bit size of field (zero if none). */
attr = dwarf2_attr (die, DW_AT_bit_size, cu);
attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
if (attr)
{
- FIELD_BITPOS (*fp) =
- decode_locdesc (DW_BLOCK (attr), cu) * bits_per_byte;
+ int byte_offset;
+
+ if (attr_form_is_section_offset (attr))
+ {
+ dwarf2_complex_location_expr_complaint ();
+ byte_offset = 0;
+ }
+ else if (attr_form_is_constant (attr))
+ byte_offset = dwarf2_get_attr_constant_value (attr, 0);
+ else
+ byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
+
+ SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
}
- else
- FIELD_BITPOS (*fp) = 0;
attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
if (attr)
{
- if (BITS_BIG_ENDIAN)
+ if (gdbarch_bits_big_endian (gdbarch))
{
/* For big endian bits, the DW_AT_bit_offset gives the
additional bit offset from the MSB of the containing
}
/* Get name of field. */
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr && DW_STRING (attr))
- fieldname = DW_STRING (attr);
+ fieldname = dwarf2_name (die, cu);
+ if (fieldname == NULL)
+ fieldname = "";
/* The name is already allocated along with this objfile, so we don't
need to duplicate it for the type. */
char *physname;
/* Get name of field. */
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr && DW_STRING (attr))
- fieldname = DW_STRING (attr);
- else
+ fieldname = dwarf2_name (die, cu);
+ if (fieldname == NULL)
return;
/* Get physical name. */
/* C++ base class field. */
attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
if (attr)
- FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), cu)
- * bits_per_byte);
+ SET_FIELD_BITPOS (*fp, decode_locdesc (DW_BLOCK (attr), cu)
+ * bits_per_byte);
FIELD_BITSIZE (*fp) = 0;
- FIELD_STATIC_KIND (*fp) = 0;
FIELD_TYPE (*fp) = die_type (die, cu);
FIELD_NAME (*fp) = type_name_no_tag (fp->type);
fip->nbaseclasses++;
char *fieldname;
char *physname;
struct nextfnfield *new_fnfield;
+ struct type *this_type;
/* Get name of member function. */
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr && DW_STRING (attr))
- fieldname = DW_STRING (attr);
- else
+ fieldname = dwarf2_name (die, cu);
+ if (fieldname == NULL)
return;
/* Get the mangled name. */
need to duplicate it for the type. */
fnp->physname = physname ? physname : "";
fnp->type = alloc_type (objfile);
- if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC)
+ this_type = read_type_die (die, cu);
+ if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
{
- int nparams = TYPE_NFIELDS (die->type);
+ int nparams = TYPE_NFIELDS (this_type);
- /* TYPE is the domain of this method, and DIE->TYPE is the 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 (die->type),
- TYPE_FIELDS (die->type),
- TYPE_NFIELDS (die->type),
- TYPE_VARARGS (die->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
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)
+ if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
fnp->voffset = VOFFSET_STATIC;
}
else
{
fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
}
- else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
+ else if (attr_form_is_section_offset (attr))
{
dwarf2_complex_location_expr_complaint ();
}
GCC shouldn't do this; it should just output pointer to member DIEs.
This is GCC PR debug/28767. */
-static int
+static struct type *
quirk_gcc_member_function_pointer (struct die_info *die, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
|| die->child->sibling == NULL
|| (die->child->sibling->sibling != NULL
&& die->child->sibling->sibling->tag != DW_TAG_padding))
- return 0;
+ return NULL;
/* Check for __pfn and __delta members. */
pfn_die = die->child;
|| pfn_name == NULL
|| DW_STRING (pfn_name) == NULL
|| strcmp ("__pfn", DW_STRING (pfn_name)) != 0)
- return 0;
+ return NULL;
delta_die = pfn_die->sibling;
delta_name = dwarf2_attr (delta_die, DW_AT_name, cu);
|| delta_name == NULL
|| DW_STRING (delta_name) == NULL
|| strcmp ("__delta", DW_STRING (delta_name)) != 0)
- return 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 0;
+ 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 0;
+ return NULL;
domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
type = alloc_type (objfile);
TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
TYPE_VARARGS (pfn_type));
type = lookup_methodptr_type (type);
- set_die_type (die, type, cu);
-
- return 1;
+ return set_die_type (die, type, cu);
}
/* Called when we find the DIE that starts a structure or union scope
checking about whether the struct/union is anonymous or not (and
suppresses creating a symbol table entry itself). */
-static void
+static struct type *
read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
struct type *type;
struct attribute *attr;
- const char *previous_prefix = processing_current_prefix;
- struct cleanup *back_to = NULL;
-
- if (die->type)
- return;
+ char *name;
+ struct cleanup *back_to = make_cleanup (null_cleanup, 0);
- if (quirk_gcc_member_function_pointer (die, cu))
- return;
+ type = quirk_gcc_member_function_pointer (die, cu);
+ if (type)
+ return type;
type = alloc_type (objfile);
INIT_CPLUS_SPECIFIC (type);
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr && DW_STRING (attr))
+ name = dwarf2_name (die, cu);
+ if (name != NULL)
{
if (cu->language == language_cplus
|| cu->language == language_java)
{
- char *new_prefix = determine_class_name (die, cu);
- TYPE_TAG_NAME (type) = obsavestring (new_prefix,
- strlen (new_prefix),
- &objfile->objfile_obstack);
- back_to = make_cleanup (xfree, new_prefix);
- processing_current_prefix = new_prefix;
+ 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) = DW_STRING (attr);
+ TYPE_TAG_NAME (type) = name;
}
}
TYPE_LENGTH (type) = 0;
}
- TYPE_FLAGS (type) |= TYPE_FLAG_STUB_SUPPORTED;
+ TYPE_STUB_SUPPORTED (type) = 1;
if (die_is_declaration (die, cu))
- TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
+ TYPE_STUB (type) = 1;
/* We need to add the type field to the die immediately so we don't
infinitely recurse when dealing with pointers to the structure
{
struct field_info fi;
struct die_info *child_die;
- struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
memset (&fi, 0, sizeof (struct field_info));
else if (child_die->tag == DW_TAG_subprogram)
{
/* C++ member function. */
- read_type_die (child_die, cu);
dwarf2_add_member_fn (&fi, child_die, type, cu);
}
else if (child_die->tag == DW_TAG_inheritance)
}
}
}
-
- do_cleanups (back_to);
}
- processing_current_prefix = previous_prefix;
- if (back_to != NULL)
- do_cleanups (back_to);
+ do_cleanups (back_to);
+ return type;
}
static void
process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
- const char *previous_prefix = processing_current_prefix;
struct die_info *child_die = die->child;
+ struct type *this_type;
- if (TYPE_TAG_NAME (die->type) != NULL)
- processing_current_prefix = TYPE_TAG_NAME (die->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
attribute, and a declaration attribute. */
if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
|| !die_is_declaration (die, cu))
- new_symbol (die, die->type, cu);
-
- processing_current_prefix = previous_prefix;
+ new_symbol (die, this_type, cu);
}
/* Given a DW_AT_enumeration_type die, set its type. We do not
complete the type's fields yet, or create any symbols. */
-static void
+static struct type *
read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
struct type *type;
struct attribute *attr;
-
- if (die->type)
- return;
+ const char *name;
type = alloc_type (objfile);
TYPE_CODE (type) = TYPE_CODE_ENUM;
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr && DW_STRING (attr))
- {
- char *name = DW_STRING (attr);
-
- if (processing_has_namespace_info)
- {
- TYPE_TAG_NAME (type) = typename_concat (&objfile->objfile_obstack,
- processing_current_prefix,
- name, cu);
- }
- 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;
- }
- }
+ name = dwarf2_full_name (die, cu);
+ if (name != NULL)
+ TYPE_TAG_NAME (type) = (char *) name;
attr = dwarf2_attr (die, DW_AT_byte_size, cu);
if (attr)
TYPE_LENGTH (type) = 0;
}
- set_die_type (die, type, cu);
+ /* 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;
+
+ return set_die_type (die, type, cu);
}
/* Determine the name of the type represented by DIE, which should be
- a named C++ or Java compound type. Return the name in question; the caller
- is responsible for xfree()'ing it. */
+ a named C++ or Java compound type. Return the name in question,
+ allocated on the objfile obstack. */
-static char *
+static const char *
determine_class_name (struct die_info *die, struct dwarf2_cu *cu)
{
- struct cleanup *back_to = NULL;
- struct die_info *spec_die = die_specification (die, cu);
- char *new_prefix = NULL;
-
- /* If this is the definition of a class that is declared by another
- die, then processing_current_prefix may not be accurate; see
- read_func_scope for a similar example. */
- if (spec_die != NULL)
- {
- char *specification_prefix = determine_prefix (spec_die, cu);
- processing_current_prefix = specification_prefix;
- back_to = make_cleanup (xfree, specification_prefix);
- }
+ const char *new_prefix = NULL;
/* If we don't have namespace debug info, guess the name by trying
to demangle the names of members, just like we did in
{
if (child->tag == DW_TAG_subprogram)
{
- new_prefix
+ char *phys_prefix
= language_class_name_from_physname (cu->language_defn,
dwarf2_linkage_name
(child, cu));
- if (new_prefix != NULL)
- break;
+ if (phys_prefix != NULL)
+ {
+ new_prefix
+ = obsavestring (phys_prefix, strlen (phys_prefix),
+ &cu->objfile->objfile_obstack);
+ xfree (phys_prefix);
+ break;
+ }
}
}
}
if (new_prefix == NULL)
- {
- const char *name = dwarf2_name (die, cu);
- new_prefix = typename_concat (NULL, processing_current_prefix,
- name ? name : "<<anonymous>>",
- cu);
- }
-
- if (back_to != NULL)
- do_cleanups (back_to);
+ new_prefix = dwarf2_full_name (die, cu);
return new_prefix;
}
struct objfile *objfile = cu->objfile;
struct die_info *child_die;
struct field *fields;
- struct attribute *attr;
struct symbol *sym;
int num_fields;
int unsigned_enum = 1;
+ char *name;
+ struct type *this_type;
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)
{
child_die = die->child;
}
else
{
- attr = dwarf2_attr (child_die, DW_AT_name, cu);
- if (attr)
+ name = dwarf2_name (child_die, cu);
+ if (name)
{
- sym = new_symbol (child_die, die->type, cu);
+ sym = new_symbol (child_die, this_type, cu);
if (SYMBOL_VALUE (sym) < 0)
unsigned_enum = 0;
* sizeof (struct field));
}
- FIELD_NAME (fields[num_fields]) = DEPRECATED_SYMBOL_NAME (sym);
+ FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
FIELD_TYPE (fields[num_fields]) = NULL;
- FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym);
+ SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
FIELD_BITSIZE (fields[num_fields]) = 0;
- FIELD_STATIC_KIND (fields[num_fields]) = 0;
num_fields++;
}
if (num_fields)
{
- TYPE_NFIELDS (die->type) = num_fields;
- TYPE_FIELDS (die->type) = (struct field *)
- TYPE_ALLOC (die->type, sizeof (struct field) * num_fields);
- memcpy (TYPE_FIELDS (die->type), fields,
+ 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_FLAGS (die->type) |= TYPE_FLAG_UNSIGNED;
+ TYPE_UNSIGNED (this_type) = 1;
}
- new_symbol (die, die->type, cu);
+ new_symbol (die, this_type, cu);
}
/* 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 void
+static struct type *
read_array_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
struct attribute *attr;
int ndim = 0;
struct cleanup *back_to;
-
- /* Return if we've already decoded this type. */
- if (die->type)
- {
- return;
- }
+ char *name;
element_type = die_type (die, cu);
arrays with unspecified length. */
if (die->child == NULL)
{
- index_type = dwarf2_fundamental_type (objfile, FT_INTEGER, cu);
+ index_type = builtin_type_int32;
range_type = create_range_type (NULL, index_type, 0, -1);
- set_die_type (die, create_array_type (NULL, element_type, range_type),
- cu);
- return;
+ type = create_array_type (NULL, element_type, range_type);
+ return set_die_type (die, type, cu);
}
back_to = make_cleanup (null_cleanup, NULL);
{
if (child_die->tag == DW_TAG_subrange_type)
{
- read_subrange_type (child_die, cu);
-
- if (child_die->type != NULL)
+ 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 == 0)
make_cleanup (free_current_contents, &range_types);
}
- range_types[ndim++] = child_die->type;
+ range_types[ndim++] = child_type;
}
}
child_die = sibling_die (child_die);
to functions. */
attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
if (attr)
- TYPE_FLAGS (type) |= TYPE_FLAG_VECTOR;
+ make_vector_type (type);
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr && DW_STRING (attr))
- TYPE_NAME (type) = DW_STRING (attr);
+ name = dwarf2_name (die, cu);
+ if (name)
+ TYPE_NAME (type) = name;
do_cleanups (back_to);
/* Install the type in the die. */
- set_die_type (die, type, cu);
+ return set_die_type (die, type, cu);
}
static enum dwarf_array_dim_ordering
/* Extract all information from a DW_TAG_set_type DIE and put it in
the DIE's type field. */
-static void
+static struct type *
read_set_type (struct die_info *die, struct dwarf2_cu *cu)
{
- if (die->type == NULL)
- die->type = create_set_type ((struct type *) NULL, die_type (die, cu));
+ struct type *set_type = create_set_type (NULL, die_type (die, cu));
+
+ return set_die_type (die, set_type, cu);
}
/* First cut: install each common block member as a global variable. */
{
base = decode_locdesc (DW_BLOCK (attr), cu);
}
- else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
+ else if (attr_form_is_section_offset (attr))
{
dwarf2_complex_location_expr_complaint ();
}
}
}
-/* Read a C++ namespace. */
+/* Create a type for a C++ namespace. */
-static void
-read_namespace (struct die_info *die, struct dwarf2_cu *cu)
+static struct type *
+read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
- const char *previous_prefix = processing_current_prefix;
- const char *name;
+ const char *previous_prefix, *name;
int is_anonymous;
- struct die_info *current_die;
- struct cleanup *back_to = make_cleanup (null_cleanup, 0);
+ struct type *type;
+
+ /* For extensions, reuse the type of the original namespace. */
+ if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
+ {
+ 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);
+ }
name = namespace_name (die, &is_anonymous, cu);
/* Now build the name of the current namespace. */
- if (previous_prefix[0] == '\0')
- {
- processing_current_prefix = name;
- }
- else
- {
- char *temp_name = typename_concat (NULL, previous_prefix, name, cu);
- make_cleanup (xfree, temp_name);
- processing_current_prefix = temp_name;
- }
+ 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;
+}
+
+/* Read a C++ namespace. */
+
+static void
+read_namespace (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct objfile *objfile = cu->objfile;
+ const char *name;
+ int is_anonymous;
/* 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_extension (die, cu) == NULL)
+ if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
{
struct type *type;
- /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
- this cast will hopefully become unnecessary. */
- type = init_type (TYPE_CODE_NAMESPACE, 0, 0,
- (char *) processing_current_prefix,
- objfile);
- TYPE_TAG_NAME (type) = TYPE_NAME (type);
-
+ type = read_type_die (die, cu);
new_symbol (die, type, cu);
- set_die_type (die, type, cu);
+ name = namespace_name (die, &is_anonymous, cu);
if (is_anonymous)
- cp_add_using_directive (processing_current_prefix,
- strlen (previous_prefix),
- strlen (processing_current_prefix));
+ {
+ const char *previous_prefix = determine_prefix (die, cu);
+ cp_add_using_directive (TYPE_NAME (type),
+ strlen (previous_prefix),
+ strlen (TYPE_NAME (type)));
+ }
}
if (die->child != NULL)
child_die = sibling_die (child_die);
}
}
+}
- processing_current_prefix = previous_prefix;
- do_cleanups (back_to);
+/* Read a Fortran module. */
+
+static void
+read_module (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct die_info *child_die = die->child;
+
+ /* FIXME: Support the separate Fortran module namespaces. */
+
+ while (child_die && child_die->tag)
+ {
+ process_die (child_die, cu);
+ child_die = sibling_die (child_die);
+ }
}
/* Return the name of the namespace represented by DIE. Set
for (current_die = die;
current_die != NULL;
- current_die = dwarf2_extension (die, cu))
+ current_die = dwarf2_extension (die, &cu))
{
name = dwarf2_name (current_die, cu);
if (name != NULL)
/* Extract all information from a DW_TAG_pointer_type DIE and add to
the user defined type vector. */
-static void
+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;
- if (die->type)
- {
- return;
- }
-
type = lookup_pointer_type (die_type (die, cu));
attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
length accordingly. */
if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
{
- if (ADDRESS_CLASS_TYPE_FLAGS_P ())
+ if (gdbarch_address_class_type_flags_p (gdbarch))
{
int type_flags;
- type_flags = ADDRESS_CLASS_TYPE_FLAGS (byte_size, addr_class);
- gdb_assert ((type_flags & ~TYPE_FLAG_ADDRESS_CLASS_ALL) == 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)
}
TYPE_LENGTH (type) = byte_size;
- set_die_type (die, type, cu);
+ return set_die_type (die, type, cu);
}
/* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
the user defined type vector. */
-static void
+static struct type *
read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
struct type *to_type;
struct type *domain;
- if (die->type)
- {
- return;
- }
-
to_type = die_type (die, cu);
domain = die_containing_type (die, cu);
else
type = lookup_memberptr_type (to_type, domain);
- set_die_type (die, type, cu);
+ 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 void
+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;
- if (die->type)
- {
- return;
- }
-
type = lookup_reference_type (die_type (die, cu));
attr = dwarf2_attr (die, DW_AT_byte_size, cu);
if (attr)
{
TYPE_LENGTH (type) = cu_header->addr_size;
}
- set_die_type (die, type, cu);
+ return set_die_type (die, type, cu);
}
-static void
+static struct type *
read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
{
- struct type *base_type;
-
- if (die->type)
- {
- return;
- }
+ struct type *base_type, *cv_type;
base_type = die_type (die, cu);
- set_die_type (die, make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0),
- cu);
+ cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
+ return set_die_type (die, cv_type, cu);
}
-static void
+static struct type *
read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
{
- struct type *base_type;
-
- if (die->type)
- {
- return;
- }
+ struct type *base_type, *cv_type;
base_type = die_type (die, cu);
- set_die_type (die, make_cv_type (TYPE_CONST (base_type), 1, base_type, 0),
- cu);
+ cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
+ return set_die_type (die, cv_type, cu);
}
/* Extract all information from a DW_TAG_string_type DIE and add to
but it behaves like one, with other DIE's using an AT_user_def_type
attribute to reference it. */
-static void
+static struct type *
read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
struct attribute *attr;
unsigned int length;
- if (die->type)
- {
- return;
- }
-
attr = dwarf2_attr (die, DW_AT_string_length, cu);
if (attr)
{
length = 1;
}
}
- index_type = dwarf2_fundamental_type (objfile, FT_INTEGER, cu);
+
+ index_type = builtin_type_int32;
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, cu);
- type = create_string_type (char_type, range_type);
- }
- set_die_type (die, type, cu);
+ type = create_string_type (NULL, range_type);
+
+ return set_die_type (die, type, cu);
}
/* Handle DIES due to C code like:
('funcp' generates a DW_TAG_subroutine_type DIE)
*/
-static void
+static struct type *
read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct type *type; /* Type that this function returns */
struct type *ftype; /* Function that returns above type */
struct attribute *attr;
- /* Decode the type that this subroutine returns */
- if (die->type)
- {
- return;
- }
type = die_type (die, cu);
ftype = make_function_type (type, (struct type **) 0);
- /* All functions in C++ and Java have prototypes. */
+ /* 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)
- TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
-
+ || 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;
+
if (die->child != NULL)
{
struct die_info *child_die;
if (child_die->tag == DW_TAG_formal_parameter)
nparams++;
else if (child_die->tag == DW_TAG_unspecified_parameters)
- TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS;
+ TYPE_VARARGS (ftype) = 1;
child_die = sibling_die (child_die);
}
}
}
- set_die_type (die, ftype, cu);
+ return set_die_type (die, ftype, cu);
}
-static void
+static struct type *
read_typedef (struct die_info *die, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
struct attribute *attr;
- char *name = NULL;
+ const char *name = NULL;
+ struct type *this_type;
- if (!die->type)
- {
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr && DW_STRING (attr))
- {
- name = DW_STRING (attr);
- }
- set_die_type (die, init_type (TYPE_CODE_TYPEDEF, 0,
- TYPE_FLAG_TARGET_STUB, name, objfile),
- cu);
- TYPE_TARGET_TYPE (die->type) = die_type (die, cu);
- }
+ 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;
}
/* Find a representation of a given base type and install
it in the TYPE field of the die. */
-static void
+static struct type *
read_base_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
struct type *type;
struct attribute *attr;
int encoding = 0, size = 0;
-
- /* If we've already decoded this die, this is a no-op. */
- if (die->type)
- {
- return;
- }
+ char *name;
+ enum type_code code = TYPE_CODE_INT;
+ int type_flags = 0;
+ struct type *target_type = NULL;
attr = dwarf2_attr (die, DW_AT_encoding, cu);
if (attr)
{
size = DW_UNSND (attr);
}
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr && DW_STRING (attr))
+ name = dwarf2_name (die, cu);
+ if (!name)
{
- enum type_code code = TYPE_CODE_INT;
- int type_flags = 0;
-
- switch (encoding)
- {
- 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:
- break;
- case DW_ATE_unsigned:
- type_flags |= TYPE_FLAG_UNSIGNED;
- break;
- case DW_ATE_signed_char:
- if (cu->language == language_m2)
- code = TYPE_CODE_CHAR;
- break;
- case DW_ATE_unsigned_char:
- if (cu->language == language_m2)
- 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;
- }
- 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,
- cu);
- else if (encoding == DW_ATE_complex_float)
- {
- if (size == 32)
- TYPE_TARGET_TYPE (type)
- = dwarf2_fundamental_type (objfile, FT_EXT_PREC_FLOAT, cu);
- else if (size == 16)
- TYPE_TARGET_TYPE (type)
- = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT, cu);
- else if (size == 8)
- TYPE_TARGET_TYPE (type)
- = dwarf2_fundamental_type (objfile, FT_FLOAT, cu);
- }
+ complaint (&symfile_complaints,
+ _("DW_AT_name missing from DW_TAG_base_type"));
}
- else
+
+ switch (encoding)
{
- type = dwarf_base_type (encoding, size, cu);
+ 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;
}
- set_die_type (die, type, cu);
+
+ type = init_type (code, size, type_flags, NULL, objfile);
+ TYPE_NAME (type) = name;
+ TYPE_TARGET_TYPE (type) = target_type;
+
+ if (name && strcmp (name, "char") == 0)
+ TYPE_NOSIGN (type) = 1;
+
+ return set_die_type (die, type, cu);
}
/* Read the given DW_AT_subrange DIE. */
-static void
+static struct type *
read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
struct type *base_type;
struct type *range_type;
struct attribute *attr;
int low = 0;
int high = -1;
+ char *name;
- /* If we have already decoded this die, then nothing more to do. */
- if (die->type)
- return;
-
base_type = die_type (die, cu);
if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
{
complaint (&symfile_complaints,
_("DW_AT_type missing from DW_TAG_subrange_type"));
- base_type = dwarf_base_type (DW_ATE_signed, TARGET_ADDR_BIT / 8, cu);
+ base_type
+ = init_type (TYPE_CODE_INT, gdbarch_addr_bit (gdbarch) / 8,
+ 0, NULL, cu->objfile);
}
if (cu->language == language_fortran)
range_type = create_range_type (NULL, base_type, low, high);
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr && DW_STRING (attr))
- TYPE_NAME (range_type) = DW_STRING (attr);
+ 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);
- set_die_type (die, range_type, cu);
+ return set_die_type (die, range_type, cu);
}
-static void
+static struct type *
read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct type *type;
- struct attribute *attr;
-
- if (die->type)
- return;
/* For now, we only support the C meaning of an unspecified type: void. */
- attr = dwarf2_attr (die, DW_AT_name, cu);
- type = init_type (TYPE_CODE_VOID, 0, 0, attr ? DW_STRING (attr) : "",
- cu->objfile);
+ type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
+ TYPE_NAME (type) = dwarf2_name (die, cu);
- set_die_type (die, type, cu);
+ return set_die_type (die, type, cu);
+}
+
+/* Trivial hash function for die_info: the hash value of a DIE
+ is its offset in .debug_info for this objfile. */
+
+static hashval_t
+die_hash (const void *item)
+{
+ const struct die_info *die = item;
+ return die->offset;
+}
+
+/* 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;
}
/* Read a whole compilation unit into a linked list of dies. */
static struct die_info *
read_comp_unit (gdb_byte *info_ptr, bfd *abfd, struct dwarf2_cu *cu)
{
+ 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);
+
return read_die_and_children (info_ptr, abfd, cu, &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 (gdb_byte *info_ptr, bfd *abfd,
+ struct dwarf2_cu *cu,
+ gdb_byte **new_info_ptr,
+ struct die_info *parent)
+{
+ struct die_info *result = read_die_and_children_1 (info_ptr, abfd, cu,
+ new_info_ptr, parent);
+
+ if (dwarf2_die_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Read die from .debug_info:\n");
+ dump_die (result, dwarf2_die_debug);
+ }
+
+ return result;
+}
+
/* 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
is the parent of the die in question. */
static struct die_info *
-read_die_and_children (gdb_byte *info_ptr, bfd *abfd,
- struct dwarf2_cu *cu,
- gdb_byte **new_info_ptr,
- struct die_info *parent)
+read_die_and_children_1 (gdb_byte *info_ptr, bfd *abfd,
+ struct dwarf2_cu *cu,
+ gdb_byte **new_info_ptr,
+ struct die_info *parent)
{
struct die_info *die;
gdb_byte *cur_ptr;
int has_children;
cur_ptr = read_full_die (&die, abfd, info_ptr, cu, &has_children);
- store_in_ref_table (die->offset, die, cu);
+ if (die == NULL)
+ {
+ *new_info_ptr = cur_ptr;
+ return NULL;
+ }
+ store_in_ref_table (die, cu);
if (has_children)
{
while (1)
{
struct die_info *die
- = read_die_and_children (cur_ptr, abfd, cu, &cur_ptr, parent);
-
- if (!first_die)
- {
- first_die = die;
- }
- else
- {
- last_sibling->sibling = die;
- }
+ = read_die_and_children_1 (cur_ptr, abfd, cu, &cur_ptr, parent);
- if (die->tag == 0)
+ if (die == NULL)
{
*new_info_ptr = cur_ptr;
return first_die;
}
+
+ if (!first_die)
+ first_die = die;
else
- {
- last_sibling = die;
- }
+ last_sibling->sibling = die;
+
+ last_sibling = die;
}
}
-/* Free a linked list of dies. */
+/* Decompress a section that was compressed using zlib. Store the
+ decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
static void
-free_die_list (struct die_info *dies)
+zlib_decompress_section (struct objfile *objfile, asection *sectp,
+ gdb_byte **outbuf, bfd_size_type *outsize)
{
- struct die_info *die, *next;
+ 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);
+ bfd_size_type uncompressed_size;
+ gdb_byte *uncompressed_buffer;
+ z_stream strm;
+ int rc;
+ int header_size = 12;
- die = dies;
- while (die)
- {
- if (die->child != NULL)
- free_die_list (die->child);
- next = die->sibling;
- xfree (die->attrs);
- xfree (die);
- die = next;
- }
+ 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);
+
+ xfree (compressed_buffer);
+ *outbuf = uncompressed_buffer;
+ *outsize = uncompressed_size;
+#endif
}
+
/* Read the contents of the section at OFFSET and of size SIZE from the
- object file specified by OBJFILE into the objfile_obstack and return it. */
+ object file specified by OBJFILE into the objfile_obstack and return it.
+ If the section is compressed, uncompress it before returning. */
gdb_byte *
dwarf2_read_section (struct objfile *objfile, asection *sectp)
bfd *abfd = objfile->obfd;
gdb_byte *buf, *retbuf;
bfd_size_type size = bfd_get_section_size (sectp);
+ unsigned char header[4];
if (size == 0)
return NULL;
+ /* Check if the file has a 4-byte header indicating compression. */
+ if (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, &buf, &size);
+ dwarf2_resize_section (sectp, size);
+ return buf;
+ }
+ }
+
+ /* If we get here, we are a normal, not-compressed section. */
buf = obstack_alloc (&objfile->objfile_obstack, 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)
return retbuf;
#endif
case DW_TAG_base_type:
case DW_TAG_class_type:
+ case DW_TAG_interface_type:
case DW_TAG_enumeration_type:
case DW_TAG_structure_type:
case DW_TAG_subrange_type:
&& !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)
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
+ 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. */
+ 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))))
+ || 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;
struct attribute attr;
int has_low_pc_attr = 0;
int has_high_pc_attr = 0;
+ CORE_ADDR base_address = 0;
+ enum
+ {
+ base_address_none,
+ base_address_low_pc,
+ /* Overrides BASE_ADDRESS_LOW_PC. */
+ base_address_entry_pc
+ }
+ base_address_type = base_address_none;
memset (part_die, 0, sizeof (struct partial_die_info));
switch (attr.name)
{
case DW_AT_name:
-
- /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
- if (part_die->name == NULL)
- part_die->name = DW_STRING (&attr);
+ switch (part_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. */
+ 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_comp_dir:
if (part_die->dirname == NULL)
case DW_AT_low_pc:
has_low_pc_attr = 1;
part_die->lowpc = DW_ADDR (&attr);
+ if (part_die->tag == DW_TAG_compile_unit
+ && base_address_type < base_address_low_pc)
+ {
+ base_address = DW_ADDR (&attr);
+ base_address_type = base_address_low_pc;
+ }
break;
case DW_AT_high_pc:
has_high_pc_attr = 1;
part_die->highpc = DW_ADDR (&attr);
break;
+ case DW_AT_entry_pc:
+ if (part_die->tag == DW_TAG_compile_unit
+ && base_address_type < base_address_entry_pc)
+ {
+ base_address = DW_ADDR (&attr);
+ base_address_type = base_address_entry_pc;
+ }
+ break;
+ case DW_AT_ranges:
+ if (part_die->tag == DW_TAG_compile_unit)
+ {
+ cu->ranges_offset = DW_UNSND (&attr);
+ cu->has_ranges_offset = 1;
+ }
+ 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 == DW_FORM_data4 || attr.form == DW_FORM_data8)
+ else if (attr_form_is_section_offset (&attr))
{
dwarf2_complex_location_expr_complaint ();
}
case DW_AT_specification:
case DW_AT_extension:
part_die->has_specification = 1;
- part_die->spec_offset = dwarf2_get_ref_die_offset (&attr, cu);
+ part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
break;
case DW_AT_sibling:
/* Ignore absolute siblings, they might point outside of
complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
else
part_die->sibling = dwarf2_per_objfile->info_buffer
- + dwarf2_get_ref_die_offset (&attr, cu);
+ + dwarf2_get_ref_die_offset (&attr);
break;
case DW_AT_stmt_list:
part_die->has_stmt_list = 1;
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;
}
&& (part_die->lowpc != 0
|| dwarf2_per_objfile->has_section_at_zero))
part_die->has_pc_info = 1;
+
+ if (base_address_type != base_address_none && !cu->base_known)
+ {
+ gdb_assert (part_die->tag == DW_TAG_compile_unit);
+ cu->base_known = 1;
+ cu->base_address = base_address;
+ }
+
return info_ptr;
}
/* Find a cached partial DIE at OFFSET in CU. */
static struct partial_die_info *
-find_partial_die_in_comp_unit (unsigned long offset, struct dwarf2_cu *cu)
+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;
/* Find a partial DIE at OFFSET, which may or may not be in CU. */
static struct partial_die_info *
-find_partial_die (unsigned long offset, struct dwarf2_cu *cu)
+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 (offset >= cu->header.offset
- && offset < cu->header.offset + cu->header.length)
+ if (offset_in_cu_p (&cu->header, offset))
{
pd = find_partial_die_in_comp_unit (offset, cu);
if (pd != NULL)
dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
back_to = make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
}
- info_ptr = per_cu->cu->header.first_die_ptr;
+ 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, info_ptr,
if (pd == NULL)
internal_error (__FILE__, __LINE__,
- _("could not find partial DIE 0x%lx in cache [from module %s]\n"),
+ _("could not find partial DIE 0x%x in cache [from module %s]\n"),
offset, bfd_get_filename (cu->objfile->obfd));
return pd;
}
info_ptr += bytes_read;
if (!abbrev_number)
{
- die = dwarf_alloc_die ();
- die->tag = 0;
- die->abbrev = abbrev_number;
- die->type = NULL;
- *diep = die;
+ *diep = NULL;
*has_children = 0;
return info_ptr;
}
abbrev_number,
bfd_get_filename (abfd));
}
- die = dwarf_alloc_die ();
+ die = dwarf_alloc_die (cu, abbrev->num_attrs);
die->offset = offset;
die->tag = abbrev->tag;
die->abbrev = abbrev_number;
- die->type = NULL;
die->num_attrs = abbrev->num_attrs;
- die->attrs = (struct attribute *)
- xmalloc (die->num_attrs * sizeof (struct attribute));
for (i = 0; i < abbrev->num_attrs; ++i)
- {
- info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
- abfd, info_ptr, cu);
-
- /* If this attribute is an absolute reference to a different
- compilation unit, make sure that compilation unit is loaded
- also. */
- if (die->attrs[i].form == DW_FORM_ref_addr
- && (DW_ADDR (&die->attrs[i]) < cu->header.offset
- || (DW_ADDR (&die->attrs[i])
- >= cu->header.offset + cu->header.length)))
- {
- struct dwarf2_per_cu_data *per_cu;
- per_cu = dwarf2_find_containing_comp_unit (DW_ADDR (&die->attrs[i]),
- cu->objfile);
-
- /* Mark the dependence relation so that we don't flush PER_CU
- too early. */
- dwarf2_add_dependence (cu, per_cu);
-
- /* If it's already on the queue, we have nothing to do. */
- if (per_cu->queued)
- continue;
-
- /* If the compilation unit is already loaded, just mark it as
- used. */
- if (per_cu->cu != NULL)
- {
- per_cu->cu->last_used = 0;
- continue;
- }
-
- /* Add it to the queue. */
- queue_comp_unit (per_cu);
- }
- }
+ info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
+ abfd, info_ptr, cu);
*diep = die;
*has_children = abbrev->has_children;
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 0x%lx"),
+ DW_UNSND (attr));
+ DW_UNSND (attr) = 0;
+ }
+
return info_ptr;
}
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 read_offset().)
-
+
[ 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
] */
static LONGEST
-read_initial_length (bfd *abfd, gdb_byte *buf, struct comp_unit_head *cu_header,
- unsigned int *bytes_read)
+read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
{
LONGEST length = bfd_get_32 (abfd, buf);
*bytes_read = 4;
}
- if (cu_header)
- {
- gdb_assert (cu_header->initial_length_size == 0
- || cu_header->initial_length_size == 4
- || cu_header->initial_length_size == 8
- || cu_header->initial_length_size == 12);
+ return length;
+}
- if (cu_header->initial_length_size != 0
- && cu_header->initial_length_size != *bytes_read)
- complaint (&symfile_complaints,
- _("intermixed 32-bit and 64-bit DWARF sections"));
+/* 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. */
- cu_header->initial_length_size = *bytes_read;
- cu_header->offset_size = (*bytes_read == 4) ? 4 : 8;
- }
+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;
}
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 (cu_header->offset_size)
+ switch (offset_size)
{
case 4:
retval = bfd_get_32 (abfd, buf);
- *bytes_read = 4;
break;
case 8:
retval = bfd_get_64 (abfd, buf);
- *bytes_read = 8;
break;
default:
internal_error (__FILE__, __LINE__,
- _("read_offset: bad switch [in module %s]"),
+ _("read_offset_1: bad switch [in module %s]"),
bfd_get_filename (abfd));
}
const struct comp_unit_head *cu_header,
unsigned int *bytes_read_ptr)
{
- LONGEST str_offset = read_offset (abfd, buf, cu_header,
- bytes_read_ptr);
+ LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
if (dwarf2_per_objfile->str_buffer == NULL)
{
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:
}
if (spec)
- return dwarf2_attr (follow_die_ref (die, spec, cu), name, cu);
+ {
+ die = follow_die_ref (die, spec, &cu);
+ return dwarf2_attr (die, name, cu);
+ }
return NULL;
}
}
/* Return the die giving the specification for DIE, if there is
- one. */
+ one. *SPEC_CU is the CU containing DIE on input, and the CU
+ containing the return value on output. */
static struct die_info *
-die_specification (struct die_info *die, struct dwarf2_cu *cu)
+die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
{
- struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, cu);
+ struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
+ *spec_cu);
if (spec_attr == NULL)
return NULL;
else
- return follow_die_ref (die, spec_attr, cu);
+ return follow_die_ref (die, spec_attr, spec_cu);
}
/* Free the line_header structure *LH, and any arrays and strings it
struct cleanup *back_to;
struct line_header *lh;
gdb_byte *line_ptr;
- unsigned int bytes_read;
+ unsigned int bytes_read, offset_size;
int i;
char *cur_dir, *cur_file;
/* Read in the header. */
lh->total_length =
- read_initial_length (abfd, line_ptr, &cu->header, &bytes_read);
+ 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))
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 (abfd, line_ptr, &cu->header, &bytes_read);
- line_ptr += bytes_read;
+ 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);
dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
struct dwarf2_cu *cu, struct partial_symtab *pst)
{
- gdb_byte *line_ptr;
+ gdb_byte *line_ptr, *extended_end;
gdb_byte *line_end;
- unsigned int bytes_read;
+ unsigned int bytes_read, extended_len;
unsigned char op_code, extended_op, adj_opcode;
CORE_ADDR baseaddr;
struct objfile *objfile = cu->objfile;
{
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)
{
address += (adj_opcode / lh->line_range)
* lh->minimum_instruction_length;
line += lh->line_base + (adj_opcode % lh->line_range);
- lh->file_names[file - 1].included_p = 1;
- if (!decode_for_pst_p)
- {
- if (last_subfile != current_subfile)
- {
- if (last_subfile)
- record_line (last_subfile, 0, address);
- last_subfile = current_subfile;
+ 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)
+ {
+ if (last_subfile != current_subfile)
+ {
+ if (last_subfile)
+ record_line (last_subfile, 0, address);
+ last_subfile = current_subfile;
+ }
+ /* Append row to matrix using current values. */
+ record_line (current_subfile, line,
+ check_cu_functions (address, cu));
}
- /* Append row to matrix using current values. */
- record_line (current_subfile, line,
- check_cu_functions (address, cu));
- }
+ }
basic_block = 1;
}
else switch (op_code)
{
case DW_LNS_extended_op:
- read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
+ 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;
- lh->file_names[file - 1].included_p = 1;
- if (!decode_for_pst_p)
- record_line (current_subfile, 0, address);
break;
case DW_LNE_set_address:
address = read_address (abfd, line_ptr, cu, &bytes_read);
_("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:
- lh->file_names[file - 1].included_p = 1;
- if (!decode_for_pst_p)
+ if (lh->num_file_names < file || file == 0)
+ dwarf2_debug_line_missing_file_complaint ();
+ else
{
- if (last_subfile != current_subfile)
- {
- if (last_subfile)
- record_line (last_subfile, 0, address);
- last_subfile = current_subfile;
- }
- record_line (current_subfile, line,
- check_cu_functions (address, cu));
+ lh->file_names[file - 1].included_p = 1;
+ if (!decode_for_pst_p)
+ {
+ if (last_subfile != current_subfile)
+ {
+ if (last_subfile)
+ record_line (last_subfile, 0, address);
+ last_subfile = current_subfile;
+ }
+ record_line (current_subfile, line,
+ check_cu_functions (address, cu));
+ }
}
basic_block = 0;
break;
file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
line_ptr += bytes_read;
- 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);
- }
+ 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:
}
}
}
+ 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)
+ record_line (current_subfile, 0, address);
+ }
}
if (decode_for_pst_p)
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));
- SYMBOL_CLASS (sym) = LOC_STATIC;
return;
}
new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
struct symbol *sym = NULL;
char *name;
struct attribute *attr = NULL;
finish_block. */
SYMBOL_CLASS (sym) = LOC_BLOCK;
attr2 = dwarf2_attr (die, DW_AT_external, cu);
- if (attr2 && (DW_UNSND (attr2) != 0))
+ 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
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);
+ SYMBOL_TYPE (sym)
+ = builtin_type (gdbarch)->nodebug_data_symbol;
+
attr = dwarf2_attr (die, DW_AT_const_value, cu);
if (attr)
{
SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
add_symbol_to_list (sym, &global_symbols);
}
+ 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:
+ SYMBOL_IS_ARGUMENT (sym) = 1;
attr = dwarf2_attr (die, DW_AT_location, cu);
if (attr)
{
var_decode_location (attr, sym, cu);
- /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
- if (SYMBOL_CLASS (sym) == LOC_COMPUTED)
- SYMBOL_CLASS (sym) = LOC_COMPUTED_ARG;
}
attr = dwarf2_attr (die, DW_AT_const_value, cu);
if (attr)
(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:
/* 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. Synthesize a typedef symbol
- so that "ptype foo" works as expected. */
+ defines a typedef for the class. */
if (cu->language == language_cplus
|| cu->language == language_java
|| cu->language == language_ada)
{
- struct symbol *typedef_sym = (struct symbol *)
- obstack_alloc (&objfile->objfile_obstack,
- sizeof (struct symbol));
- *typedef_sym = *sym;
- SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
/* 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);
- add_symbol_to_list (typedef_sym, list_to_add);
}
}
break;
case DW_TAG_typedef:
- if (processing_has_namespace_info
- && processing_current_prefix[0] != '\0')
- {
- SYMBOL_LINKAGE_NAME (sym) = typename_concat (&objfile->objfile_obstack,
- processing_current_prefix,
- name, cu);
- }
+ 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);
add_symbol_to_list (sym, cu->list_in_scope);
break;
case DW_TAG_enumerator:
- if (processing_has_namespace_info
- && processing_current_prefix[0] != '\0')
- {
- SYMBOL_LINKAGE_NAME (sym) = typename_concat (&objfile->objfile_obstack,
- processing_current_prefix,
- name, cu);
- }
+ SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu);
attr = dwarf2_attr (die, DW_AT_const_value, cu);
if (attr)
{
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);
}
{
case DW_FORM_addr:
if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
- dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
+ dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
cu_header->addr_size,
TYPE_LENGTH (SYMBOL_TYPE
(sym)));
DW_ADDR (attr));
SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
break;
+ 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 (DEPRECATED_SYMBOL_NAME (sym),
+ dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
blk->size,
TYPE_LENGTH (SYMBOL_TYPE
(sym)));
static struct type *
die_type (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
struct type *type;
struct attribute *type_attr;
struct die_info *type_die;
if (!type_attr)
{
/* A missing DW_AT_type represents a void type. */
- return dwarf2_fundamental_type (cu->objfile, FT_VOID, cu);
+ return builtin_type (gdbarch)->builtin_void;
}
else
- type_die = follow_die_ref (die, type_attr, cu);
+ type_die = follow_die_ref (die, type_attr, &cu);
type = tag_type_to_type (type_die, cu);
if (!type)
{
- dump_die (type_die);
+ dump_die_for_error (type_die);
error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
cu->objfile->name);
}
type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
if (type_attr)
{
- type_die = follow_die_ref (die, type_attr, cu);
+ type_die = follow_die_ref (die, type_attr, &cu);
type = tag_type_to_type (type_die, cu);
}
if (!type)
{
if (type_die)
- dump_die (type_die);
+ dump_die_for_error (type_die);
error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
cu->objfile->name);
}
static struct type *
tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
{
- if (die->type)
- {
- return die->type;
- }
- else
+ struct type *this_type;
+
+ this_type = read_type_die (die, cu);
+ if (!this_type)
{
- read_type_die (die, cu);
- if (!die->type)
- {
- dump_die (die);
- error (_("Dwarf Error: Cannot find type of die [in module %s]"),
- cu->objfile->name);
- }
- return die->type;
+ dump_die_for_error (die);
+ error (_("Dwarf Error: Cannot find type of die [in module %s]"),
+ cu->objfile->name);
}
+ return this_type;
}
-static void
+static struct type *
read_type_die (struct die_info *die, struct dwarf2_cu *cu)
{
- char *prefix = determine_prefix (die, cu);
- const char *old_prefix = processing_current_prefix;
- struct cleanup *back_to = make_cleanup (xfree, prefix);
- processing_current_prefix = prefix;
-
+ 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:
- read_structure_type (die, cu);
+ this_type = read_structure_type (die, cu);
break;
case DW_TAG_enumeration_type:
- read_enumeration_type (die, cu);
+ this_type = read_enumeration_type (die, cu);
break;
case DW_TAG_subprogram:
case DW_TAG_subroutine_type:
- read_subroutine_type (die, cu);
+ this_type = read_subroutine_type (die, cu);
break;
case DW_TAG_array_type:
- read_array_type (die, cu);
+ this_type = read_array_type (die, cu);
break;
case DW_TAG_set_type:
- read_set_type (die, cu);
+ this_type = read_set_type (die, cu);
break;
case DW_TAG_pointer_type:
- read_tag_pointer_type (die, cu);
+ this_type = read_tag_pointer_type (die, cu);
break;
case DW_TAG_ptr_to_member_type:
- read_tag_ptr_to_member_type (die, cu);
+ this_type = read_tag_ptr_to_member_type (die, cu);
break;
case DW_TAG_reference_type:
- read_tag_reference_type (die, cu);
+ this_type = read_tag_reference_type (die, cu);
break;
case DW_TAG_const_type:
- read_tag_const_type (die, cu);
+ this_type = read_tag_const_type (die, cu);
break;
case DW_TAG_volatile_type:
- read_tag_volatile_type (die, cu);
+ this_type = read_tag_volatile_type (die, cu);
break;
case DW_TAG_string_type:
- read_tag_string_type (die, cu);
+ this_type = read_tag_string_type (die, cu);
break;
case DW_TAG_typedef:
- read_typedef (die, cu);
+ this_type = read_typedef (die, cu);
break;
case DW_TAG_subrange_type:
- read_subrange_type (die, cu);
+ this_type = read_subrange_type (die, cu);
break;
case DW_TAG_base_type:
- read_base_type (die, cu);
+ this_type = read_base_type (die, cu);
break;
case DW_TAG_unspecified_type:
- read_unspecified_type (die, cu);
+ 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'"),
break;
}
- processing_current_prefix = old_prefix;
- do_cleanups (back_to);
+ return this_type;
}
/* Return the name of the namespace/class that DIE is defined within,
- or "" if we can't tell. The caller should xfree the result. */
+ or "" if we can't tell. The caller should not xfree the result.
-/* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
- therein) for an example of how to use this function to deal with
- DW_AT_specification. */
+ 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;
+ 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 NULL;
+ return "";
- parent = die->parent;
+ /* We have to be careful in the presence of DW_AT_specification.
+ For example, with GCC 3.4, given the code
- if (parent == NULL)
+ 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
{
- return xstrdup ("");
+ parent = spec_die->parent;
+ cu = spec_cu;
}
+
+ if (parent == NULL)
+ return "";
else
- {
- switch (parent->tag) {
+ switch (parent->tag)
+ {
case DW_TAG_namespace:
- {
- /* FIXME: carlton/2004-03-05: Should I follow extension dies
- before doing this check? */
- if (parent->type != NULL && TYPE_TAG_NAME (parent->type) != NULL)
- {
- return xstrdup (TYPE_TAG_NAME (parent->type));
- }
- else
- {
- int dummy;
- char *parent_prefix = determine_prefix (parent, cu);
- char *retval = typename_concat (NULL, parent_prefix,
- namespace_name (parent, &dummy,
- cu),
- cu);
- xfree (parent_prefix);
- return retval;
- }
- }
- break;
+ 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:
- {
- if (parent->type != NULL && TYPE_TAG_NAME (parent->type) != NULL)
- {
- return xstrdup (TYPE_TAG_NAME (parent->type));
- }
- else
- {
- const char *old_prefix = processing_current_prefix;
- char *new_prefix = determine_prefix (parent, cu);
- char *retval;
-
- processing_current_prefix = new_prefix;
- retval = determine_class_name (parent, cu);
- processing_current_prefix = old_prefix;
-
- xfree (new_prefix);
- return retval;
- }
- }
+ 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
#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 (obs == NULL)
- {
- char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
- retval[0] = '\0';
-
- if (prefix)
- {
- strcpy (retval, prefix);
- strcat (retval, sep);
- }
- if (suffix)
- strcat (retval, suffix);
-
- return retval;
- }
- else
- {
- /* We have an obstack. */
- return obconcat (obs, prefix, sep, suffix);
- }
-}
-
-static struct type *
-dwarf_base_type (int encoding, int size, struct dwarf2_cu *cu)
-{
- struct objfile *objfile = cu->objfile;
-
- /* FIXME - this should not produce a new (struct type *)
- every time. It should cache base types. */
- struct type *type;
- switch (encoding)
- {
- case DW_ATE_address:
- type = dwarf2_fundamental_type (objfile, FT_VOID, cu);
- return type;
- case DW_ATE_boolean:
- type = dwarf2_fundamental_type (objfile, FT_BOOLEAN, cu);
- return type;
- case DW_ATE_complex_float:
- if (size == 16)
- {
- type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX, cu);
- }
- else
- {
- type = dwarf2_fundamental_type (objfile, FT_COMPLEX, cu);
- }
- return type;
- case DW_ATE_float:
- if (size == 8)
- {
- type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT, cu);
- }
- else
- {
- type = dwarf2_fundamental_type (objfile, FT_FLOAT, cu);
- }
- return type;
- case DW_ATE_signed:
- switch (size)
- {
- case 1:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR, cu);
- break;
- case 2:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT, cu);
- break;
- default:
- case 4:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER, cu);
- break;
- }
- return type;
- case DW_ATE_signed_char:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR, cu);
- return type;
- case DW_ATE_unsigned:
- switch (size)
- {
- case 1:
- type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR, cu);
- break;
- case 2:
- type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT, cu);
- break;
- default:
- case 4:
- type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER, cu);
- break;
- }
- return type;
- case DW_ATE_unsigned_char:
- type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR, cu);
- return type;
- default:
- type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER, cu);
- return type;
- }
-}
-
-#if 0
-struct die_info *
-copy_die (struct die_info *old_die)
+static char *
+typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
+ struct dwarf2_cu *cu)
{
- struct die_info *new_die;
- int i, num_attrs;
-
- new_die = (struct die_info *) xmalloc (sizeof (struct die_info));
- memset (new_die, 0, sizeof (struct die_info));
+ char *sep;
- 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;
+ if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
+ sep = "";
+ else if (cu->language == language_java)
+ sep = ".";
+ else
+ sep = "::";
- num_attrs = old_die->num_attrs;
- new_die->num_attrs = num_attrs;
- new_die->attrs = (struct attribute *)
- xmalloc (num_attrs * sizeof (struct attribute));
+ if (prefix == NULL)
+ prefix = "";
+ if (suffix == NULL)
+ suffix = "";
- for (i = 0; i < old_die->num_attrs; ++i)
+ if (obs == NULL)
{
- 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;
+ 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);
}
-
- new_die->next = NULL;
- return new_die;
}
-#endif
/* Return sibling of die, NULL if no sibling. */
attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
if (attr && DW_STRING (attr))
return DW_STRING (attr);
- attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr && DW_STRING (attr))
- return DW_STRING (attr);
- return NULL;
+ 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. */
struct attribute *attr;
attr = dwarf2_attr (die, DW_AT_name, cu);
- if (attr && DW_STRING (attr))
- return DW_STRING (attr);
- return NULL;
+ 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 (attr->form != GDB_FORM_cached_string)
+ {
+ DW_STRING (attr)
+ = dwarf2_canonicalize_name (DW_STRING (attr), cu,
+ &cu->objfile->objfile_obstack);
+ attr->form = GDB_FORM_cached_string;
+ }
+ return DW_STRING (attr);
+ }
}
/* Return the die that this die in an extension of, or NULL if there
- is none. */
+ 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 *cu)
+dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
{
struct attribute *attr;
- attr = dwarf2_attr (die, DW_AT_extension, cu);
+ attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
if (attr == NULL)
return NULL;
- return follow_die_ref (die, attr, cu);
+ return follow_die_ref (die, attr, ext_cu);
}
/* Convert a DIE tag into its string name. */
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_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_associated";
case DW_AT_data_location:
return "DW_AT_data_location";
- case DW_AT_stride:
- return "DW_AT_stride";
+ 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_pure";
case DW_AT_recursive:
return "DW_AT_recursive";
-#ifdef MIPS
/* 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_clone_origin";
case DW_AT_MIPS_has_inlines:
return "DW_AT_MIPS_has_inlines";
-#endif
/* 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_FORM_ref_udata";
case DW_FORM_indirect:
return "DW_FORM_indirect";
+ case GDB_FORM_cached_string:
+ return "GDB_FORM_cached_string";
default:
return "DW_FORM_<unknown>";
}
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";
#endif
static void
-dump_die (struct die_info *die)
+dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
{
unsigned int i;
- fprintf_unfiltered (gdb_stderr, "Die: %s (abbrev = %d, offset = %d)\n",
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
dwarf_tag_name (die->tag), die->abbrev, die->offset);
- fprintf_unfiltered (gdb_stderr, "\thas children: %s\n",
+
+ 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));
- fprintf_unfiltered (gdb_stderr, "\tattributes:\n");
+ print_spaces (indent, f);
+ fprintf_unfiltered (f, " attributes:\n");
+
for (i = 0; i < die->num_attrs; ++i)
{
- fprintf_unfiltered (gdb_stderr, "\t\t%s (%s) ",
+ 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 (gdb_stderr, "address: ");
- deprecated_print_address_numeric (DW_ADDR (&die->attrs[i]), 1, gdb_stderr);
+ fprintf_unfiltered (f, "address: ");
+ fputs_filtered (paddress (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 (gdb_stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
+ 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 (gdb_stderr, "constant ref: %ld (adjusted)",
+ fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
(long) (DW_ADDR (&die->attrs[i])));
break;
case DW_FORM_data1:
case DW_FORM_data8:
case DW_FORM_udata:
case DW_FORM_sdata:
- fprintf_unfiltered (gdb_stderr, "constant: %ld", DW_UNSND (&die->attrs[i]));
+ fprintf_unfiltered (f, "constant: %ld", DW_UNSND (&die->attrs[i]));
break;
case DW_FORM_string:
case DW_FORM_strp:
- fprintf_unfiltered (gdb_stderr, "string: \"%s\"",
+ case GDB_FORM_cached_string:
+ fprintf_unfiltered (f, "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");
+ fprintf_unfiltered (f, "flag: TRUE");
else
- fprintf_unfiltered (gdb_stderr, "flag: FALSE");
+ 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 (gdb_stderr, "unexpected attribute form: DW_FORM_indirect");
+ fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect");
break;
default:
- fprintf_unfiltered (gdb_stderr, "unsupported attribute form: %d.",
+ fprintf_unfiltered (f, "unsupported attribute form: %d.",
die->attrs[i].form);
+ break;
}
- fprintf_unfiltered (gdb_stderr, "\n");
+ fprintf_unfiltered (f, "\n");
}
}
static void
-dump_die_list (struct die_info *die)
+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)
{
- while (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 (die);
- if (die->child != NULL)
- dump_die_list (die->child);
- if (die->sibling != NULL)
- dump_die_list (die->sibling);
+ 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 (unsigned int offset, struct die_info *die,
- struct dwarf2_cu *cu)
+store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
{
- int h;
- struct die_info *old;
+ void **slot;
- h = (offset % REF_HASH_SIZE);
- old = cu->die_ref_table[h];
- die->next_ref = old;
- cu->die_ref_table[h] = die;
+ slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
+
+ *slot = die;
}
static unsigned int
-dwarf2_get_ref_die_offset (struct attribute *attr, struct dwarf2_cu *cu)
+dwarf2_get_ref_die_offset (struct attribute *attr)
{
unsigned int result = 0;
}
}
+/* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
+ unit and add it to our queue. */
+
+static void
+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;
+
+ /* If the compilation unit is already loaded, just mark it as
+ used. */
+ if (per_cu->cu != NULL)
+ {
+ per_cu->cu->last_used = 0;
+ return;
+ }
+
+ /* Add it to the queue. */
+ queue_comp_unit (per_cu, this_cu->objfile);
+}
+
static struct die_info *
follow_die_ref (struct die_info *src_die, struct attribute *attr,
- struct dwarf2_cu *cu)
+ struct dwarf2_cu **ref_cu)
{
struct die_info *die;
unsigned int offset;
- int h;
struct die_info temp_die;
- struct dwarf2_cu *target_cu;
+ struct dwarf2_cu *target_cu, *cu = *ref_cu;
- offset = dwarf2_get_ref_die_offset (attr, cu);
+ offset = dwarf2_get_ref_die_offset (attr);
- if (DW_ADDR (attr) < cu->header.offset
- || DW_ADDR (attr) >= cu->header.offset + cu->header.length)
+ if (! offset_in_cu_p (&cu->header, offset))
{
struct dwarf2_per_cu_data *per_cu;
- per_cu = dwarf2_find_containing_comp_unit (DW_ADDR (attr),
- cu->objfile);
+ per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
+
+ /* If necessary, add it to the queue and load its DIEs. */
+ maybe_queue_comp_unit (cu, per_cu);
+
target_cu = per_cu->cu;
}
else
target_cu = cu;
- h = (offset % REF_HASH_SIZE);
- die = target_cu->die_ref_table[h];
- while (die)
- {
- if (die->offset == offset)
- return die;
- die = die->next_ref;
- }
+ *ref_cu = target_cu;
+ temp_die.offset = offset;
+ die = htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
+ if (die)
+ return die;
error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
"at 0x%lx [in module %s]"),
- (long) src_die->offset, (long) offset, cu->objfile->name);
-
- return NULL;
-}
-
-static struct type *
-dwarf2_fundamental_type (struct objfile *objfile, int typeid,
- struct dwarf2_cu *cu)
-{
- if (typeid < 0 || typeid >= FT_NUM_MEMBERS)
- {
- error (_("Dwarf Error: internal error - invalid fundamental type id %d [in module %s]"),
- typeid, objfile->name);
- }
-
- /* 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 (cu->ftypes[typeid] == NULL)
- {
- cu->ftypes[typeid] = cu->language_defn->la_fund_type (objfile, typeid);
- }
-
- return (cu->ftypes[typeid]);
+ (long) offset, (long) src_die->offset, cu->objfile->name);
}
/* Decode simple location descriptions.
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));
}
static struct die_info *
-dwarf_alloc_die (void)
+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 *) xmalloc (sizeof (struct die_info));
+ die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
memset (die, 0, sizeof (struct die_info));
return (die);
}
{
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)
{
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;
- for (;;)
+ do
{
- enum dwarf_macinfo_record_type macinfo_type;
-
/* Do we at least have room for a macinfo type byte? */
if (mac_ptr >= mac_end)
{
- dwarf2_macros_too_long_complaint ();
- return;
+ /* 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);
/* A zero macinfo type indicates the end of the macro
information. */
case 0:
- return;
+ 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:
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 macro %s outside of any file: %s"),
+ _("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", body);
- else
- {
- 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);
- }
+ 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;
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);
+ 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;
}
break;
}
- }
+ } while (macinfo_type != 0);
}
/* Check if the attribute's form is a DW_FORM_block*
|| 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 0;
+ }
+}
+
static void
dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
struct dwarf2_cu *cu)
{
- if ((attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
+ 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. */
baton = obstack_alloc (&cu->objfile->objfile_obstack,
sizeof (struct dwarf2_loclist_baton));
- baton->objfile = cu->objfile;
+ 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->header.base_address;
- if (cu->header.base_known == 0)
+ baton->base_address = cu->base_address;
+ if (cu->base_known == 0)
complaint (&symfile_complaints,
_("Location list used without specifying the CU base address."));
baton = obstack_alloc (&cu->objfile->objfile_obstack,
sizeof (struct dwarf2_locexpr_baton));
- baton->objfile = cu->objfile;
+ baton->per_cu = cu->per_cu;
+ gdb_assert (baton->per_cu);
if (attr_form_is_block (attr))
{
}
}
+/* Return the OBJFILE associated with the compilation unit CU. */
+
+struct objfile *
+dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
+{
+ 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
+ {
+ /* 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;
+ }
+}
+
/* Locate the compilation unit from CU's objfile which contains the
DIE at OFFSET. Raises an error on failure. */
static struct dwarf2_per_cu_data *
-dwarf2_find_containing_comp_unit (unsigned long offset,
+dwarf2_find_containing_comp_unit (unsigned int offset,
struct objfile *objfile)
{
struct dwarf2_per_cu_data *this_cu;
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 %ld"), offset);
+ error (_("invalid dwarf2 offset %u"), offset);
gdb_assert (offset < this_cu->offset + this_cu->length);
return this_cu;
}
OFFSET. Raises an error on failure. */
static struct dwarf2_per_cu_data *
-dwarf2_find_comp_unit (unsigned long offset, struct objfile *objfile)
+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 %ld."), offset);
+ error (_("no compilation unit with offset %u."), offset);
return this_cu;
}
cu->per_cu = NULL;
obstack_free (&cu->comp_unit_obstack, NULL);
- if (cu->dies)
- free_die_list (cu->dies);
xfree (cu);
}
}
}
+/* Release all extra memory associated with OBJFILE. */
+
+void
+dwarf2_free_objfile (struct objfile *objfile)
+{
+ dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
+
+ if (dwarf2_per_objfile == NULL)
+ return;
+
+ /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
+ free_cached_comp_units (NULL);
+
+ /* Everything else should be on the objfile obstack. */
+}
+
/* 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. */
}
/* Set the type associated with DIE to TYPE. Save it in CU's hash
- table if necessary. */
+ table if necessary. For convenience, return TYPE. */
-static void
+static struct type *
set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
{
struct dwarf2_offset_and_type **slot, ofs;
- die->type = type;
-
- if (cu->per_cu == NULL)
- return;
-
- if (cu->per_cu->type_hash == 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);
+ 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->per_cu->type_hash, &ofs, ofs.offset, INSERT);
+ 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;
}
-/* Find the type for DIE in TYPE_HASH, or return NULL if DIE does not
- have a saved type. */
+/* Find the type for DIE in CU's type_hash, or return NULL if DIE does
+ not have a saved type. */
static struct type *
-get_die_type (struct die_info *die, htab_t type_hash)
+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;
+
+ if (type_hash == NULL)
+ return NULL;
ofs.offset = die->offset;
slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
return NULL;
}
-/* Restore the types of the DIE tree starting at START_DIE from the hash
- table saved in CU. */
-
-static void
-reset_die_and_siblings_types (struct die_info *start_die, struct dwarf2_cu *cu)
-{
- struct die_info *die;
-
- if (cu->per_cu->type_hash == NULL)
- return;
-
- for (die = start_die; die != NULL; die = die->sibling)
- {
- die->type = get_die_type (die, cu->per_cu->type_hash);
- if (die->child != NULL)
- reset_die_and_siblings_types (die->child, cu);
- }
-}
-
/* Set the mark field in CU and in every other compilation unit in the
cache that we must keep because we are keeping CU. */
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