/* DWARF 2 debugging format support for GDB.
Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
- 2004, 2005, 2006, 2007, 2008 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
#include "hashtab.h"
#include "command.h"
#include "gdbcmd.h"
+#include "block.h"
#include "addrmap.h"
#include <fcntl.h>
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif
-
-/* A note on memory usage for this file.
-
- At the present time, this code reads the debug info sections into
- the objfile's objfile_obstack. A definite improvement for startup
- time, on platforms which do not emit relocations for debug
- sections, would be to use mmap instead. The object's complete
- debug information is loaded into memory, partly to simplify
- absolute DIE references.
-
- Whether using obstacks or mmap, the sections should remain loaded
- until the objfile is released, and pointers into the section data
- can be used for any other data associated to the objfile (symbol
- names, type names, location expressions to name a few). */
+#ifdef HAVE_MMAP
+#include <sys/mman.h>
+#endif
#if 0
/* .debug_info header for a compilation unit
}
_STATEMENT_PROLOGUE;
+/* When non-zero, dump DIEs after they are read in. */
+static int dwarf2_die_debug = 0;
+
+static int pagesize;
+
/* When set, the file that we're processing is known to have debugging
info for C++ namespaces. GCC 3.3.x did not produce this information,
but later versions do. */
static const struct objfile_data *dwarf2_objfile_data_key;
+struct dwarf2_section_info
+{
+ asection *asection;
+ gdb_byte *buffer;
+ bfd_size_type size;
+ int was_mmapped;
+};
+
struct dwarf2_per_objfile
{
- /* Sizes of debugging sections. */
- unsigned int info_size;
- unsigned int abbrev_size;
- unsigned int line_size;
- unsigned int pubnames_size;
- unsigned int aranges_size;
- unsigned int loc_size;
- unsigned int macinfo_size;
- unsigned int str_size;
- unsigned int ranges_size;
- unsigned int frame_size;
- unsigned int eh_frame_size;
-
- /* Loaded data from the sections. */
- gdb_byte *info_buffer;
- gdb_byte *abbrev_buffer;
- gdb_byte *line_buffer;
- gdb_byte *str_buffer;
- gdb_byte *macinfo_buffer;
- gdb_byte *ranges_buffer;
- gdb_byte *loc_buffer;
+ struct dwarf2_section_info info;
+ struct dwarf2_section_info abbrev;
+ struct dwarf2_section_info line;
+ struct dwarf2_section_info pubnames;
+ struct dwarf2_section_info aranges;
+ struct dwarf2_section_info loc;
+ struct dwarf2_section_info macinfo;
+ struct dwarf2_section_info str;
+ struct dwarf2_section_info ranges;
+ struct dwarf2_section_info frame;
+ struct dwarf2_section_info eh_frame;
/* A list of all the compilation units. This is used to locate
the target compilation unit of a particular reference. */
static struct dwarf2_per_objfile *dwarf2_per_objfile;
-static asection *dwarf_info_section;
-static asection *dwarf_abbrev_section;
-static asection *dwarf_line_section;
-static asection *dwarf_pubnames_section;
-static asection *dwarf_aranges_section;
-static asection *dwarf_loc_section;
-static asection *dwarf_macinfo_section;
-static asection *dwarf_str_section;
-static asection *dwarf_ranges_section;
-asection *dwarf_frame_section;
-asection *dwarf_eh_frame_section;
-
/* names of the debugging sections */
/* Note that if the debugging section has been compressed, it might
translation, looks like this. */
struct comp_unit_head
{
- unsigned long length;
+ unsigned int length;
short version;
unsigned char addr_size;
unsigned char signed_addr_p;
htab_t partial_dies;
/* `.debug_ranges' offset for this `DW_TAG_compile_unit' DIE. */
- unsigned long ranges_offset;
+ unsigned int ranges_offset;
/* Storage for things with the same lifetime as this read-in compilation
unit, including partial DIEs. */
{
/* 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
ENUM_BITFIELD(dwarf_form) form : 16;
};
+/* Additional GDB-specific attribute forms. */
+enum
+ {
+ /* 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
{
_(".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,
- struct dwarf2_cu *cu);
+ int need_pc, struct dwarf2_cu *cu);
static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
gdb_byte *info_ptr,
static void psymtab_to_symtab_1 (struct partial_symtab *);
-gdb_byte *dwarf2_read_section (struct objfile *, asection *);
-
static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
static void dwarf2_free_abbrev_table (void *);
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 void read_namespace (struct die_info *die, struct dwarf2_cu *);
+static void read_module (struct die_info *die, struct dwarf2_cu *cu);
+
+static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
+
static const char *namespace_name (struct die_info *die,
int *is_anonymous, 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,
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,
static struct die_info *sibling_die (struct die_info *);
-static void dump_die (struct die_info *);
+static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
+
+static void dump_die_for_error (struct die_info *);
-static void dump_die_list (struct die_info *);
+static void dump_die_1 (struct ui_file *, int level, int max_level,
+ struct die_info *);
+
+/*static*/ void dump_die (struct die_info *, int max_level);
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 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 *);
set_objfile_data (objfile, dwarf2_objfile_data_key, data);
dwarf2_per_objfile = data;
- dwarf_info_section = 0;
- dwarf_abbrev_section = 0;
- dwarf_line_section = 0;
- dwarf_str_section = 0;
- dwarf_macinfo_section = 0;
- dwarf_frame_section = 0;
- dwarf_eh_frame_section = 0;
- dwarf_ranges_section = 0;
- dwarf_loc_section = 0;
-
bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
- return (dwarf_info_section != NULL && dwarf_abbrev_section != NULL);
+ return (data->info.asection != NULL && data->abbrev.asection != NULL);
}
/* When loading sections, we can either look for ".<name>", or for
* ".z<name>", which indicates a compressed section. */
static int
-section_is_p (asection *sectp, const char *name)
+section_is_p (const char *section_name, 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));
+ return (section_name[0] == '.'
+ && (strcmp (section_name + 1, name) == 0
+ || (section_name[1] == 'z'
+ && strcmp (section_name + 2, name) == 0)));
}
/* This function is mapped across the sections and remembers the
static void
dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
{
- if (section_is_p (sectp, INFO_SECTION))
+ if (section_is_p (sectp->name, INFO_SECTION))
{
- dwarf2_per_objfile->info_size = bfd_get_section_size (sectp);
- dwarf_info_section = sectp;
+ dwarf2_per_objfile->info.asection = sectp;
+ dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
}
- else if (section_is_p (sectp, ABBREV_SECTION))
+ else if (section_is_p (sectp->name, ABBREV_SECTION))
{
- dwarf2_per_objfile->abbrev_size = bfd_get_section_size (sectp);
- dwarf_abbrev_section = sectp;
+ dwarf2_per_objfile->abbrev.asection = sectp;
+ dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
}
- else if (section_is_p (sectp, LINE_SECTION))
+ else if (section_is_p (sectp->name, LINE_SECTION))
{
- dwarf2_per_objfile->line_size = bfd_get_section_size (sectp);
- dwarf_line_section = sectp;
+ dwarf2_per_objfile->line.asection = sectp;
+ dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
}
- else if (section_is_p (sectp, PUBNAMES_SECTION))
+ else if (section_is_p (sectp->name, PUBNAMES_SECTION))
{
- dwarf2_per_objfile->pubnames_size = bfd_get_section_size (sectp);
- dwarf_pubnames_section = sectp;
+ dwarf2_per_objfile->pubnames.asection = sectp;
+ dwarf2_per_objfile->pubnames.size = bfd_get_section_size (sectp);
}
- else if (section_is_p (sectp, ARANGES_SECTION))
+ else if (section_is_p (sectp->name, ARANGES_SECTION))
{
- dwarf2_per_objfile->aranges_size = bfd_get_section_size (sectp);
- dwarf_aranges_section = sectp;
+ dwarf2_per_objfile->aranges.asection = sectp;
+ dwarf2_per_objfile->aranges.size = bfd_get_section_size (sectp);
}
- else if (section_is_p (sectp, LOC_SECTION))
+ else if (section_is_p (sectp->name, LOC_SECTION))
{
- dwarf2_per_objfile->loc_size = bfd_get_section_size (sectp);
- dwarf_loc_section = sectp;
+ dwarf2_per_objfile->loc.asection = sectp;
+ dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
}
- else if (section_is_p (sectp, MACINFO_SECTION))
+ else if (section_is_p (sectp->name, MACINFO_SECTION))
{
- dwarf2_per_objfile->macinfo_size = bfd_get_section_size (sectp);
- dwarf_macinfo_section = sectp;
+ dwarf2_per_objfile->macinfo.asection = sectp;
+ dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
}
- else if (section_is_p (sectp, STR_SECTION))
+ else if (section_is_p (sectp->name, STR_SECTION))
{
- dwarf2_per_objfile->str_size = bfd_get_section_size (sectp);
- dwarf_str_section = sectp;
+ dwarf2_per_objfile->str.asection = sectp;
+ dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
}
- else if (section_is_p (sectp, FRAME_SECTION))
+ else if (section_is_p (sectp->name, FRAME_SECTION))
{
- dwarf2_per_objfile->frame_size = bfd_get_section_size (sectp);
- dwarf_frame_section = sectp;
+ dwarf2_per_objfile->frame.asection = sectp;
+ dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
}
- else if (section_is_p (sectp, EH_FRAME_SECTION))
+ else if (section_is_p (sectp->name, EH_FRAME_SECTION))
{
flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
if (aflag & SEC_HAS_CONTENTS)
{
- dwarf2_per_objfile->eh_frame_size = bfd_get_section_size (sectp);
- dwarf_eh_frame_section = sectp;
+ dwarf2_per_objfile->eh_frame.asection = sectp;
+ dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
}
}
- else if (section_is_p (sectp, RANGES_SECTION))
+ else if (section_is_p (sectp->name, RANGES_SECTION))
{
- dwarf2_per_objfile->ranges_size = bfd_get_section_size (sectp);
- dwarf_ranges_section = sectp;
+ dwarf2_per_objfile->ranges.asection = sectp;
+ dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
}
-
+
if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
&& bfd_section_vma (abfd, sectp) == 0)
dwarf2_per_objfile->has_section_at_zero = 1;
}
-/* This function is called after decompressing a section, so
- dwarf2_per_objfile can record its new, uncompressed size. */
+/* Decompress a section that was compressed using zlib. Store the
+ decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
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);
+zlib_decompress_section (struct objfile *objfile, asection *sectp,
+ gdb_byte **outbuf, bfd_size_type *outsize)
+{
+ bfd *abfd = objfile->obfd;
+#ifndef HAVE_ZLIB_H
+ error (_("Support for zlib-compressed DWARF data (from '%s') "
+ "is disabled in this copy of GDB"),
+ bfd_get_filename (abfd));
+#else
+ bfd_size_type compressed_size = bfd_get_section_size (sectp);
+ gdb_byte *compressed_buffer = xmalloc (compressed_size);
+ struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
+ bfd_size_type uncompressed_size;
+ gdb_byte *uncompressed_buffer;
+ z_stream strm;
+ int rc;
+ int header_size = 12;
+
+ if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
+ || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
+ error (_("Dwarf Error: Can't read DWARF data from '%s'"),
+ bfd_get_filename (abfd));
+
+ /* Read the zlib header. In this case, it should be "ZLIB" followed
+ by the uncompressed section size, 8 bytes in big-endian order. */
+ if (compressed_size < header_size
+ || strncmp (compressed_buffer, "ZLIB", 4) != 0)
+ error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
+ bfd_get_filename (abfd));
+ uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
+ uncompressed_size += compressed_buffer[11];
+
+ /* It is possible the section consists of several compressed
+ buffers concatenated together, so we uncompress in a loop. */
+ strm.zalloc = NULL;
+ strm.zfree = NULL;
+ strm.opaque = NULL;
+ strm.avail_in = compressed_size - header_size;
+ strm.next_in = (Bytef*) compressed_buffer + header_size;
+ strm.avail_out = uncompressed_size;
+ uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
+ uncompressed_size);
+ rc = inflateInit (&strm);
+ while (strm.avail_in > 0)
+ {
+ if (rc != Z_OK)
+ error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
+ bfd_get_filename (abfd), rc);
+ strm.next_out = ((Bytef*) uncompressed_buffer
+ + (uncompressed_size - strm.avail_out));
+ rc = inflate (&strm, Z_FINISH);
+ if (rc != Z_STREAM_END)
+ error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
+ bfd_get_filename (abfd), rc);
+ rc = inflateReset (&strm);
+ }
+ rc = inflateEnd (&strm);
+ if (rc != Z_OK
+ || strm.avail_out != 0)
+ error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
+ bfd_get_filename (abfd), rc);
+
+ do_cleanups (cleanup);
+ *outbuf = uncompressed_buffer;
+ *outsize = uncompressed_size;
+#endif
}
-/* Build a partial symbol table. */
+/* Read the contents of the section SECTP from object file specified by
+ OBJFILE, store info about the section into INFO.
+ If the section is compressed, uncompress it before returning. */
-void
-dwarf2_build_psymtabs (struct objfile *objfile, int mainline)
+static void
+dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
{
- /* We definitely need the .debug_info and .debug_abbrev sections */
+ bfd *abfd = objfile->obfd;
+ asection *sectp = info->asection;
+ gdb_byte *buf, *retbuf;
+ unsigned char header[4];
- dwarf2_per_objfile->info_buffer = dwarf2_read_section (objfile, dwarf_info_section);
- dwarf2_per_objfile->abbrev_buffer = dwarf2_read_section (objfile, dwarf_abbrev_section);
+ info->buffer = NULL;
+ info->was_mmapped = 0;
- if (dwarf_line_section)
- dwarf2_per_objfile->line_buffer = dwarf2_read_section (objfile, dwarf_line_section);
- else
- dwarf2_per_objfile->line_buffer = NULL;
+ if (info->asection == NULL || info->size == 0)
+ return;
- if (dwarf_str_section)
- dwarf2_per_objfile->str_buffer = dwarf2_read_section (objfile, dwarf_str_section);
- else
- dwarf2_per_objfile->str_buffer = NULL;
+ /* Check if the file has a 4-byte header indicating compression. */
+ if (info->size > sizeof (header)
+ && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
+ && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
+ {
+ /* Upon decompression, update the buffer and its size. */
+ if (strncmp (header, "ZLIB", sizeof (header)) == 0)
+ {
+ zlib_decompress_section (objfile, sectp, &info->buffer,
+ &info->size);
+ return;
+ }
+ }
- if (dwarf_macinfo_section)
- dwarf2_per_objfile->macinfo_buffer = dwarf2_read_section (objfile,
- dwarf_macinfo_section);
- else
- dwarf2_per_objfile->macinfo_buffer = NULL;
+#ifdef HAVE_MMAP
+ if (pagesize == 0)
+ pagesize = getpagesize ();
- if (dwarf_ranges_section)
- dwarf2_per_objfile->ranges_buffer = dwarf2_read_section (objfile, dwarf_ranges_section);
- else
- dwarf2_per_objfile->ranges_buffer = NULL;
+ /* Only try to mmap sections which are large enough: we don't want to
+ waste space due to fragmentation. Also, only try mmap for sections
+ without relocations. */
+
+ if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
+ {
+ off_t pg_offset = sectp->filepos & ~(pagesize - 1);
+ size_t map_length = info->size + sectp->filepos - pg_offset;
+ caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ,
+ MAP_PRIVATE, pg_offset);
- if (dwarf_loc_section)
- dwarf2_per_objfile->loc_buffer = dwarf2_read_section (objfile, dwarf_loc_section);
+ if (retbuf != MAP_FAILED)
+ {
+ info->was_mmapped = 1;
+ info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ;
+ return;
+ }
+ }
+#endif
+
+ /* If we get here, we are a normal, not-compressed section. */
+ info->buffer = buf
+ = obstack_alloc (&objfile->objfile_obstack, info->size);
+
+ /* When debugging .o files, we may need to apply relocations; see
+ http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
+ We never compress sections in .o files, so we only need to
+ try this when the section is not compressed. */
+ retbuf = symfile_relocate_debug_section (abfd, sectp, buf);
+ if (retbuf != NULL)
+ {
+ info->buffer = retbuf;
+ return;
+ }
+
+ if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
+ || bfd_bread (buf, info->size, abfd) != info->size)
+ error (_("Dwarf Error: Can't read DWARF data from '%s'"),
+ bfd_get_filename (abfd));
+}
+
+/* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
+ SECTION_NAME. */
+
+void
+dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
+ asection **sectp, gdb_byte **bufp,
+ bfd_size_type *sizep)
+{
+ struct dwarf2_per_objfile *data
+ = objfile_data (objfile, dwarf2_objfile_data_key);
+ struct dwarf2_section_info *info;
+ if (section_is_p (section_name, EH_FRAME_SECTION))
+ info = &data->eh_frame;
+ else if (section_is_p (section_name, FRAME_SECTION))
+ info = &data->frame;
else
- dwarf2_per_objfile->loc_buffer = NULL;
+ gdb_assert (0);
+
+ if (info->asection != NULL && info->size != 0 && info->buffer == NULL)
+ /* We haven't read this section in yet. Do it now. */
+ dwarf2_read_section (objfile, info);
+
+ *sectp = info->asection;
+ *bufp = info->buffer;
+ *sizep = info->size;
+}
+
+/* Build a partial symbol table. */
+
+void
+dwarf2_build_psymtabs (struct objfile *objfile, int mainline)
+{
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->abbrev);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->line);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->str);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->macinfo);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->loc);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->eh_frame);
+ dwarf2_read_section (objfile, &dwarf2_per_objfile->frame);
if (mainline
|| (objfile->global_psymbols.size == 0
pubnames_buffer = dwarf2_read_section (objfile,
dwarf_pubnames_section);
pubnames_ptr = pubnames_buffer;
- while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames_size)
+ 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;
}
"(is %d, should be %d) [in module %s]"), header->version,
2, bfd_get_filename (abfd));
- if (header->abbrev_offset >= dwarf2_per_objfile->abbrev_size)
+ if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size)
error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
"(offset 0x%lx + 6) [in module %s]"),
(long) header->abbrev_offset,
- (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer),
+ (long) (beg_of_comp_unit - dwarf2_per_objfile->info.buffer),
bfd_get_filename (abfd));
if (beg_of_comp_unit + header->length + header->initial_length_size
- > dwarf2_per_objfile->info_buffer + dwarf2_per_objfile->info_size)
+ > dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size)
error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
"(offset 0x%lx + 0) [in module %s]"),
(long) header->length,
- (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer),
+ (long) (beg_of_comp_unit - dwarf2_per_objfile->info.buffer),
bfd_get_filename (abfd));
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;
+ info_ptr = dwarf2_per_objfile->info.buffer;
/* Any cached compilation units will be linked by the per-objfile
read_in_chain. Make sure to free them when we're done. */
For this loop condition, simply checking whether there's any data
left at all should be sufficient. */
- while (info_ptr < (dwarf2_per_objfile->info_buffer
- + dwarf2_per_objfile->info_size))
+ while (info_ptr < (dwarf2_per_objfile->info.buffer
+ + dwarf2_per_objfile->info.size))
{
struct cleanup *back_to_inner;
struct dwarf2_cu cu;
info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr, abfd);
/* Complete the cu_header */
- cu.header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
+ cu.header.offset = beg_of_comp_unit - dwarf2_per_objfile->info.buffer;
cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
cu.list_in_scope = &file_symbols;
&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 (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'. */
pst->textlow = comp_unit_die.lowpc + baseaddr;
pst->texthigh = comp_unit_die.highpc + baseaddr;
- /* Store the contiguous range; `DW_AT_ranges' range is stored above. The
- range can be also empty for CUs with no code. */
- if (!cu.has_ranges_offset && pst->textlow < pst->texthigh)
- addrmap_set_empty (objfile->psymtabs_addrmap, pst->textlow,
- pst->texthigh - 1, pst);
-
pst->n_global_syms = objfile->global_psymbols.next -
(objfile->global_psymbols.list + pst->globals_offset);
pst->n_static_syms = objfile->static_psymbols.next -
unsigned int bytes_read;
struct cleanup *back_to;
- info_ptr = dwarf2_per_objfile->info_buffer + this_cu->offset;
+ info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
beg_of_comp_unit = info_ptr;
cu = xmalloc (sizeof (struct dwarf2_cu));
info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr, abfd);
/* Complete the cu_header. */
- cu->header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
+ cu->header.offset = beg_of_comp_unit - dwarf2_per_objfile->info.buffer;
cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
/* Read the abbrevs for this compilation unit into a table. */
int n_allocated;
int n_comp_units;
struct dwarf2_per_cu_data **all_comp_units;
- gdb_byte *info_ptr = dwarf2_per_objfile->info_buffer;
+ gdb_byte *info_ptr = dwarf2_per_objfile->info.buffer;
n_comp_units = 0;
n_allocated = 10;
all_comp_units = xmalloc (n_allocated
* sizeof (struct dwarf2_per_cu_data *));
- while (info_ptr < dwarf2_per_objfile->info_buffer + dwarf2_per_objfile->info_size)
+ 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;
+ 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:
- add_partial_subprogram (pdi, lowpc, highpc, cu);
+ add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
break;
case DW_TAG_variable:
case DW_TAG_typedef:
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;
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
static void
add_partial_subprogram (struct partial_die_info *pdi,
CORE_ADDR *lowpc, CORE_ADDR *highpc,
- struct dwarf2_cu *cu)
+ int need_pc, struct dwarf2_cu *cu)
{
if (pdi->tag == DW_TAG_subprogram)
{
*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);
}
fixup_partial_die (pdi, cu);
if (pdi->tag == DW_TAG_subprogram
|| pdi->tag == DW_TAG_lexical_block)
- add_partial_subprogram (pdi, lowpc, highpc, cu);
+ add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
pdi = pdi->die_sibling;
}
}
if (attr.form == DW_FORM_ref_addr)
complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
else
- return dwarf2_per_objfile->info_buffer
- + dwarf2_get_ref_die_offset (&attr, cu);
+ return dwarf2_per_objfile->info.buffer
+ + dwarf2_get_ref_die_offset (&attr);
}
/* If it isn't DW_AT_sibling, skip this attribute. */
dwarf2_per_objfile = objfile_data (pst->objfile,
dwarf2_objfile_data_key);
+ /* If this psymtab is constructed from a debug-only objfile, the
+ has_section_at_zero flag will not necessarily be correct. We
+ can get the correct value for this flag by looking at the data
+ associated with the (presumably stripped) associated objfile. */
+ if (pst->objfile->separate_debug_objfile_backlink)
+ {
+ struct dwarf2_per_objfile *dpo_backlink
+ = objfile_data (pst->objfile->separate_debug_objfile_backlink,
+ dwarf2_objfile_data_key);
+ dwarf2_per_objfile->has_section_at_zero
+ = dpo_backlink->has_section_at_zero;
+ }
+
psymtab_to_symtab_1 (pst);
/* Finish up the debug error message. */
{
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;
/* Set local variables from the partial symbol table info. */
offset = per_cu->offset;
- info_ptr = dwarf2_per_objfile->info_buffer + offset;
+ info_ptr = dwarf2_per_objfile->info.buffer + offset;
cu = xmalloc (sizeof (struct dwarf2_cu));
memset (cu, 0, sizeof (struct dwarf2_cu));
read_file_scope (die, cu);
break;
case DW_TAG_subprogram:
- read_func_scope (die, cu);
- break;
case DW_TAG_inlined_subroutine:
- /* FIXME: These are ignored for now.
- They could be used to set breakpoints on all inlined instances
- of a function and make GDB `next' properly over inlined functions. */
+ read_func_scope (die, cu);
break;
case DW_TAG_lexical_block:
case DW_TAG_try_block:
case DW_TAG_base_type:
case DW_TAG_subrange_type:
+ case DW_TAG_typedef:
/* Add a typedef symbol for the type definition, if it has a
DW_AT_name. */
new_symbol (die, read_type_die (die, cu), cu);
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. */
processing_has_namespace_info = 1;
- complaint (&symfile_complaints, _("unsupported tag: '%s'"),
- dwarf_tag_name (die->tag));
+ if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
+ || cu->language != language_fortran))
+ complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
+ dwarf_tag_name (die->tag));
+ read_import_statement (die, cu);
break;
default:
new_symbol (die, NULL, cu);
return name;
}
+/* Read the import statement specified by the given die and record it. */
+
+static void
+read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct attribute *import_attr;
+ struct die_info *imported_die;
+ const char *imported_name;
+ const char *imported_name_prefix;
+ const char *import_prefix;
+ char *canonical_name;
+
+ import_attr = dwarf2_attr (die, DW_AT_import, cu);
+ if (import_attr == NULL)
+ {
+ complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
+ dwarf_tag_name (die->tag));
+ return;
+ }
+
+ imported_die = follow_die_ref (die, import_attr, &cu);
+ imported_name = dwarf2_name (imported_die, cu);
+ if (imported_name == NULL)
+ {
+ /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
+
+ The import in the following code:
+ namespace A
+ {
+ typedef int B;
+ }
+
+ int main ()
+ {
+ using A::B;
+ B b;
+ return b;
+ }
+
+ ...
+ <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
+ <52> DW_AT_decl_file : 1
+ <53> DW_AT_decl_line : 6
+ <54> DW_AT_import : <0x75>
+ <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
+ <59> DW_AT_name : B
+ <5b> DW_AT_decl_file : 1
+ <5c> DW_AT_decl_line : 2
+ <5d> DW_AT_type : <0x6e>
+ ...
+ <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
+ <76> DW_AT_byte_size : 4
+ <77> DW_AT_encoding : 5 (signed)
+
+ imports the wrong die ( 0x75 instead of 0x58 ).
+ This case will be ignored until the gcc bug is fixed. */
+ return;
+ }
+
+ /* FIXME: dwarf2_name (die); for the local name after import. */
+
+ /* Figure out where the statement is being imported to. */
+ import_prefix = determine_prefix (die, cu);
+
+ /* Figure out what the scope of the imported die is and prepend it
+ to the name of the imported die. */
+ imported_name_prefix = determine_prefix (imported_die, cu);
+
+ if (strlen (imported_name_prefix) > 0)
+ {
+ canonical_name = alloca (strlen (imported_name_prefix) + 2 + strlen (imported_name) + 1);
+ strcpy (canonical_name, imported_name_prefix);
+ strcat (canonical_name, "::");
+ strcat (canonical_name, imported_name);
+ }
+ else
+ {
+ canonical_name = alloca (strlen (imported_name) + 1);
+ strcpy (canonical_name, imported_name);
+ }
+
+ using_directives = cp_add_using (import_prefix,canonical_name, using_directives);
+}
+
static void
initialize_cu_func_list (struct dwarf2_cu *cu)
{
cu->last_fn = thisfn;
}
+/* qsort helper for inherit_abstract_dies. */
+
+static int
+unsigned_int_compar (const void *ap, const void *bp)
+{
+ unsigned int a = *(unsigned int *) ap;
+ unsigned int b = *(unsigned int *) bp;
+
+ return (a > b) - (b > a);
+}
+
+/* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
+ Inherit only the children of the DW_AT_abstract_origin DIE not being already
+ referenced by DW_AT_abstract_origin from the children of the current DIE. */
+
+static void
+inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct die_info *child_die;
+ unsigned die_children_count;
+ /* CU offsets which were referenced by children of the current DIE. */
+ unsigned *offsets;
+ unsigned *offsets_end, *offsetp;
+ /* Parent of DIE - referenced by DW_AT_abstract_origin. */
+ struct die_info *origin_die;
+ /* Iterator of the ORIGIN_DIE children. */
+ struct die_info *origin_child_die;
+ struct cleanup *cleanups;
+ struct attribute *attr;
+
+ attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
+ if (!attr)
+ return;
+
+ origin_die = follow_die_ref (die, attr, &cu);
+ if (die->tag != origin_die->tag
+ && !(die->tag == DW_TAG_inlined_subroutine
+ && origin_die->tag == DW_TAG_subprogram))
+ complaint (&symfile_complaints,
+ _("DIE 0x%x and its abstract origin 0x%x have different tags"),
+ die->offset, origin_die->offset);
+
+ child_die = die->child;
+ die_children_count = 0;
+ while (child_die && child_die->tag)
+ {
+ child_die = sibling_die (child_die);
+ die_children_count++;
+ }
+ offsets = xmalloc (sizeof (*offsets) * die_children_count);
+ cleanups = make_cleanup (xfree, offsets);
+
+ offsets_end = offsets;
+ child_die = die->child;
+ while (child_die && child_die->tag)
+ {
+ attr = dwarf2_attr (child_die, DW_AT_abstract_origin, cu);
+ /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
+ counterpart may exist. */
+ if (attr)
+ {
+ struct die_info *child_origin_die;
+
+ child_origin_die = follow_die_ref (child_die, attr, &cu);
+ if (child_die->tag != child_origin_die->tag
+ && !(child_die->tag == DW_TAG_inlined_subroutine
+ && child_origin_die->tag == DW_TAG_subprogram))
+ complaint (&symfile_complaints,
+ _("Child DIE 0x%x and its abstract origin 0x%x have "
+ "different tags"), child_die->offset,
+ child_origin_die->offset);
+ *offsets_end++ = child_origin_die->offset;
+ }
+ child_die = sibling_die (child_die);
+ }
+ qsort (offsets, offsets_end - offsets, sizeof (*offsets),
+ unsigned_int_compar);
+ for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
+ if (offsetp[-1] == *offsetp)
+ complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer "
+ "to DIE 0x%x as their abstract origin"),
+ die->offset, *offsetp);
+
+ offsetp = offsets;
+ origin_child_die = origin_die->child;
+ while (origin_child_die && origin_child_die->tag)
+ {
+ /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
+ while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
+ offsetp++;
+ if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
+ {
+ /* Found that ORIGIN_CHILD_DIE is really not referenced. */
+ process_die (origin_child_die, cu);
+ }
+ origin_child_die = sibling_die (origin_child_die);
+ }
+
+ do_cleanups (cleanups);
+}
+
static void
read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
{
CORE_ADDR lowpc;
CORE_ADDR highpc;
struct die_info *child_die;
- struct attribute *attr;
+ struct attribute *attr, *call_line, *call_file;
char *name;
CORE_ADDR baseaddr;
struct block *block;
+ int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
+
+ if (inlined_func)
+ {
+ /* If we do not have call site information, we can't show the
+ caller of this inlined function. That's too confusing, so
+ only use the scope for local variables. */
+ call_line = dwarf2_attr (die, DW_AT_call_line, cu);
+ call_file = dwarf2_attr (die, DW_AT_call_file, cu);
+ if (call_line == NULL || call_file == NULL)
+ {
+ read_lexical_block_scope (die, cu);
+ return;
+ }
+ }
baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
}
}
+ inherit_abstract_dies (die, cu);
+
new = pop_context ();
/* Make a block for the local symbols within. */
block = finish_block (new->name, &local_symbols, new->old_blocks,
back to building a containing block's symbol lists. */
local_symbols = new->locals;
param_symbols = new->params;
+ using_directives = new->using_directives;
/* If we've finished processing a top-level function, subsequent
symbols go in the file symbol list. */
dwarf2_record_block_ranges (die, block, baseaddr, cu);
}
local_symbols = new->locals;
+ using_directives = new->using_directives;
}
/* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
found_base = cu->base_known;
base = cu->base_address;
- if (offset >= dwarf2_per_objfile->ranges_size)
+ 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;
+ buffer = dwarf2_per_objfile->ranges.buffer + offset;
/* Read in the largest possible address. */
marker = read_address (obfd, buffer, cu, &dummy);
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
/* 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;
+ 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.
CORE_ADDR base = cu->base_address;
int base_known = cu->base_known;
- if (offset >= dwarf2_per_objfile->ranges_size)
+ if (offset >= dwarf2_per_objfile->ranges.size)
{
complaint (&symfile_complaints,
_("Offset %lu out of bounds for DW_AT_ranges attribute"),
/* 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);
else
byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
- FIELD_BITPOS (*fp) = byte_offset * bits_per_byte;
+ 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)
{
/* 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++;
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++;
}
arrays with unspecified length. */
if (die->child == NULL)
{
- index_type = builtin_type_int32;
+ index_type = objfile_type (objfile)->builtin_int;
range_type = create_range_type (NULL, index_type, 0, -1);
type = create_array_type (NULL, element_type, range_type);
return set_die_type (die, type, cu);
if (is_anonymous)
{
const char *previous_prefix = determine_prefix (die, cu);
- cp_add_using_directive (TYPE_NAME (type),
- strlen (previous_prefix),
- strlen (TYPE_NAME (type)));
+ cp_add_using_directive (previous_prefix, TYPE_NAME (type));
}
}
}
}
+/* 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
*IS_ANONYMOUS to tell whether or not the namespace is an anonymous
namespace. */
read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
struct type *type, *range_type, *index_type, *char_type;
struct attribute *attr;
unsigned int length;
}
}
- index_type = builtin_type_int32;
+ index_type = objfile_type (objfile)->builtin_int;
range_type = create_range_type (NULL, index_type, 1, length);
- type = create_string_type (NULL, range_type);
+ char_type = language_string_char_type (cu->language_defn, gdbarch);
+ type = create_string_type (NULL, char_type, range_type);
return set_die_type (die, type, cu);
}
struct attribute *attr;
type = die_type (die, cu);
- ftype = make_function_type (type, (struct type **) 0);
+ ftype = lookup_function_type (type);
/* All functions in C++, Pascal and Java have prototypes. */
attr = dwarf2_attr (die, DW_AT_prototyped, cu);
type_flags |= TYPE_FLAG_UNSIGNED;
break;
case DW_ATE_signed_char:
- if (cu->language == language_ada || cu->language == language_m2)
+ 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)
+ if (cu->language == language_ada || cu->language == language_m2
+ || cu->language == language_pascal)
code = TYPE_CODE_CHAR;
type_flags |= TYPE_FLAG_UNSIGNED;
break;
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;
struct die_info *parent)
{
struct die_info *first_die, *last_sibling;
- gdb_byte *cur_ptr;
-
- cur_ptr = info_ptr;
- first_die = last_sibling = NULL;
-
- while (1)
- {
- struct die_info *die
- = read_die_and_children (cur_ptr, abfd, cu, &cur_ptr, parent);
-
- if (die == NULL)
- {
- *new_info_ptr = cur_ptr;
- return first_die;
- }
-
- if (!first_die)
- first_die = die;
- else
- last_sibling->sibling = die;
-
- last_sibling = die;
- }
-}
-
-/* Decompress a section that was compressed using zlib. Store the
- decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
-
-static void
-zlib_decompress_section (struct objfile *objfile, asection *sectp,
- gdb_byte **outbuf, bfd_size_type *outsize)
-{
- bfd *abfd = objfile->obfd;
-#ifndef HAVE_ZLIB_H
- error (_("Support for zlib-compressed DWARF data (from '%s') "
- "is disabled in this copy of GDB"),
- bfd_get_filename (abfd));
-#else
- bfd_size_type compressed_size = bfd_get_section_size (sectp);
- gdb_byte *compressed_buffer = xmalloc (compressed_size);
- bfd_size_type uncompressed_size;
- gdb_byte *uncompressed_buffer;
- z_stream strm;
- int rc;
- int header_size = 12;
-
- if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
- || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
- error (_("Dwarf Error: Can't read DWARF data from '%s'"),
- bfd_get_filename (abfd));
-
- /* Read the zlib header. In this case, it should be "ZLIB" followed
- by the uncompressed section size, 8 bytes in big-endian order. */
- if (compressed_size < header_size
- || strncmp (compressed_buffer, "ZLIB", 4) != 0)
- error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
- bfd_get_filename (abfd));
- uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
- uncompressed_size += compressed_buffer[11];
-
- /* It is possible the section consists of several compressed
- buffers concatenated together, so we uncompress in a loop. */
- strm.zalloc = NULL;
- strm.zfree = NULL;
- strm.opaque = NULL;
- strm.avail_in = compressed_size - header_size;
- strm.next_in = (Bytef*) compressed_buffer + header_size;
- strm.avail_out = uncompressed_size;
- uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
- uncompressed_size);
- rc = inflateInit (&strm);
- while (strm.avail_in > 0)
- {
- if (rc != Z_OK)
- error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
- bfd_get_filename (abfd), rc);
- strm.next_out = ((Bytef*) uncompressed_buffer
- + (uncompressed_size - strm.avail_out));
- rc = inflate (&strm, Z_FINISH);
- if (rc != Z_STREAM_END)
- error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
- bfd_get_filename (abfd), rc);
- rc = inflateReset (&strm);
- }
- rc = inflateEnd (&strm);
- if (rc != Z_OK
- || strm.avail_out != 0)
- error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
- bfd_get_filename (abfd), rc);
-
- 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.
- 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];
+ gdb_byte *cur_ptr;
- if (size == 0)
- return NULL;
+ cur_ptr = info_ptr;
+ first_die = last_sibling = 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))
+ while (1)
{
- /* 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;
- }
- }
+ struct die_info *die
+ = read_die_and_children_1 (cur_ptr, abfd, cu, &cur_ptr, parent);
- /* 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;
+ if (die == NULL)
+ {
+ *new_info_ptr = cur_ptr;
+ return first_die;
+ }
- if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
- || bfd_bread (buf, size, abfd) != size)
- error (_("Dwarf Error: Can't read DWARF data from '%s'"),
- bfd_get_filename (abfd));
+ if (!first_die)
+ first_die = die;
+ else
+ last_sibling->sibling = die;
- return buf;
+ last_sibling = die;
+ }
}
/* In DWARF version 2, the description of the debugging information is
memset (cu->dwarf2_abbrevs, 0,
ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
- abbrev_ptr = dwarf2_per_objfile->abbrev_buffer + cu_header->abbrev_offset;
+ abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
abbrev_ptr += bytes_read;
already read (which means we are about to read the abbreviations
for the next compile unit) or if the end of the abbreviation
table is reached. */
- if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev_buffer)
- >= dwarf2_per_objfile->abbrev_size)
+ if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
+ >= dwarf2_per_objfile->abbrev.size)
break;
abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
abbrev_ptr += bytes_read;
memset (part_die, 0, sizeof (struct partial_die_info));
- part_die->offset = info_ptr - dwarf2_per_objfile->info_buffer;
+ part_die->offset = info_ptr - dwarf2_per_objfile->info.buffer;
info_ptr += abbrev_len;
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_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
if (attr.form == DW_FORM_ref_addr)
complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
else
- part_die->sibling = dwarf2_per_objfile->info_buffer
- + dwarf2_get_ref_die_offset (&attr, cu);
+ part_die->sibling = dwarf2_per_objfile->info.buffer
+ + dwarf2_get_ref_die_offset (&attr);
break;
case DW_AT_stmt_list:
part_die->has_stmt_list = 1;
/* 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 = (dwarf2_per_objfile->info_buffer
+ 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);
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;
}
struct abbrev_info *abbrev;
struct die_info *die;
- offset = info_ptr - dwarf2_per_objfile->info_buffer;
+ offset = info_ptr - dwarf2_per_objfile->info.buffer;
abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
info_ptr += bytes_read;
if (!abbrev_number)
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)
+ if (dwarf2_per_objfile->str.buffer == NULL)
{
error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
bfd_get_filename (abfd));
return NULL;
}
- if (str_offset >= dwarf2_per_objfile->str_size)
+ if (str_offset >= dwarf2_per_objfile->str.size)
{
error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
bfd_get_filename (abfd));
return NULL;
}
gdb_assert (HOST_CHAR_BIT == 8);
- if (dwarf2_per_objfile->str_buffer[str_offset] == '\0')
+ if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
return NULL;
- return (char *) (dwarf2_per_objfile->str_buffer + str_offset);
+ return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
}
static unsigned long
switch (lang)
{
case DW_LANG_C89:
+ case DW_LANG_C99:
case DW_LANG_C:
cu->language = language_c;
break;
/* Return the die giving the specification for DIE, if there is
one. *SPEC_CU is the CU containing DIE on input, and the CU
- containing the return value on output. */
+ containing the return value on output. If there is no
+ specification, but there is an abstract origin, that is
+ returned. */
static struct die_info *
die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
*spec_cu);
+ if (spec_attr == NULL)
+ spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
+
if (spec_attr == NULL)
return NULL;
else
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;
- if (dwarf2_per_objfile->line_buffer == NULL)
+ if (dwarf2_per_objfile->line.buffer == NULL)
{
complaint (&symfile_complaints, _("missing .debug_line section"));
return 0;
/* Make sure that at least there's room for the total_length field.
That could be 12 bytes long, but we're just going to fudge that. */
- if (offset + 4 >= dwarf2_per_objfile->line_size)
+ if (offset + 4 >= dwarf2_per_objfile->line.size)
{
dwarf2_statement_list_fits_in_line_number_section_complaint ();
return 0;
back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
(void *) lh);
- line_ptr = dwarf2_per_objfile->line_buffer + offset;
+ line_ptr = dwarf2_per_objfile->line.buffer + offset;
/* 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))
+ if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
+ + dwarf2_per_objfile->line.size))
{
dwarf2_statement_list_fits_in_line_number_section_complaint ();
return 0;
lh->statement_program_end = line_ptr + lh->total_length;
lh->version = read_2_bytes (abfd, line_ptr);
line_ptr += 2;
- lh->header_length = read_offset (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);
line_ptr += bytes_read;
lh->statement_program_start = line_ptr;
- if (line_ptr > (dwarf2_per_objfile->line_buffer
- + dwarf2_per_objfile->line_size))
+ if (line_ptr > (dwarf2_per_objfile->line.buffer
+ + dwarf2_per_objfile->line.size))
complaint (&symfile_complaints,
_("line number info header doesn't fit in `.debug_line' section"));
unsigned char op_code, extended_op, adj_opcode;
CORE_ADDR baseaddr;
struct objfile *objfile = cu->objfile;
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
const int decode_for_pst_p = (pst != NULL);
struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
int is_stmt = lh->default_is_stmt;
int basic_block = 0;
int end_sequence = 0;
+ CORE_ADDR addr;
if (!decode_for_pst_p && lh->num_file_names >= file)
{
{
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);
- if (lh->num_file_names < file)
+ 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;
- }
+ if (!decode_for_pst_p && is_stmt)
+ {
+ if (last_subfile != current_subfile)
+ {
+ addr = gdbarch_addr_bits_remove (gdbarch, address);
+ if (last_subfile)
+ record_line (last_subfile, 0, addr);
+ last_subfile = current_subfile;
+ }
/* Append row to matrix using current values. */
- record_line (current_subfile, line,
- check_cu_functions (address, cu));
+ addr = check_cu_functions (address, cu);
+ addr = gdbarch_addr_bits_remove (gdbarch, addr);
+ record_line (current_subfile, line, addr);
}
}
- basic_block = 1;
+ basic_block = 0;
}
else switch (op_code)
{
{
case DW_LNE_end_sequence:
end_sequence = 1;
-
- if (lh->num_file_names < file)
- 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);
- }
break;
case DW_LNE_set_address:
address = read_address (abfd, line_ptr, cu, &bytes_read);
add_file_name (lh, cur_file, dir_index, mod_time, length);
}
break;
+ case DW_LNE_set_discriminator:
+ /* The discriminator is not interesting to the debugger;
+ just ignore it. */
+ line_ptr = extended_end;
+ break;
default:
complaint (&symfile_complaints,
_("mangled .debug_line section"));
}
break;
case DW_LNS_copy:
- if (lh->num_file_names < file)
+ 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;
- }
- record_line (current_subfile, line,
- check_cu_functions (address, cu));
- }
+ if (!decode_for_pst_p && is_stmt)
+ {
+ if (last_subfile != current_subfile)
+ {
+ addr = gdbarch_addr_bits_remove (gdbarch, address);
+ if (last_subfile)
+ record_line (last_subfile, 0, addr);
+ last_subfile = current_subfile;
+ }
+ addr = check_cu_functions (address, cu);
+ addr = gdbarch_addr_bits_remove (gdbarch, addr);
+ record_line (current_subfile, line, addr);
+ }
}
basic_block = 0;
break;
file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
line_ptr += bytes_read;
- if (lh->num_file_names < file)
+ if (lh->num_file_names < file || file == 0)
dwarf2_debug_line_missing_file_complaint ();
else
{
}
}
}
+ if (lh->num_file_names < file || file == 0)
+ dwarf2_debug_line_missing_file_complaint ();
+ else
+ {
+ lh->file_names[file - 1].included_p = 1;
+ if (!decode_for_pst_p)
+ {
+ addr = gdbarch_addr_bits_remove (gdbarch, address);
+ record_line (current_subfile, 0, addr);
+ }
+ }
}
if (decode_for_pst_p)
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;
struct attribute *attr2 = NULL;
CORE_ADDR baseaddr;
+ int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
SYMBOL_TYPE (sym) = type;
else
SYMBOL_TYPE (sym) = die_type (die, cu);
- attr = dwarf2_attr (die, DW_AT_decl_line, cu);
+ attr = dwarf2_attr (die,
+ inlined_func ? DW_AT_call_line : DW_AT_decl_line,
+ cu);
if (attr)
{
SYMBOL_LINE (sym) = DW_UNSND (attr);
}
- attr = dwarf2_attr (die, DW_AT_decl_file, cu);
+ attr = dwarf2_attr (die,
+ inlined_func ? DW_AT_call_file : DW_AT_decl_file,
+ cu);
if (attr)
{
int file_index = DW_UNSND (attr);
add_symbol_to_list (sym, cu->list_in_scope);
}
break;
+ case DW_TAG_inlined_subroutine:
+ /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
+ finish_block. */
+ SYMBOL_CLASS (sym) = LOC_BLOCK;
+ SYMBOL_INLINED (sym) = 1;
+ /* Do not add the symbol to any lists. It will be found via
+ BLOCK_FUNCTION from the blockvector. */
+ break;
case DW_TAG_variable:
/* Compilation with minimal debug info may result in variables
with missing type entries. Change the misleading `void' type
to something sensible. */
if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
SYMBOL_TYPE (sym)
- = builtin_type (gdbarch)->nodebug_data_symbol;
+ = objfile_type (objfile)->nodebug_data_symbol;
attr = dwarf2_attr (die, DW_AT_const_value, cu);
if (attr)
&& dwarf2_attr (die, DW_AT_type, cu) != NULL)
{
SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
- add_symbol_to_list (sym, &global_symbols);
+ add_symbol_to_list (sym, cu->list_in_scope);
+ }
+ else if (!die_is_declaration (die, cu))
+ {
+ /* Use the default LOC_OPTIMIZED_OUT class. */
+ gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
+ add_symbol_to_list (sym, cu->list_in_scope);
}
}
break;
case DW_TAG_formal_parameter:
- SYMBOL_IS_ARGUMENT (sym) = 1;
+ /* If we are inside a function, mark this as an argument. If
+ not, we might be looking at an argument to an inlined function
+ when we do not have enough information to show inlined frames;
+ pretend it's a local variable in that case so that the user can
+ still see it. */
+ if (context_stack_depth > 0
+ && context_stack[context_stack_depth - 1].name != NULL)
+ SYMBOL_IS_ARGUMENT (sym) = 1;
attr = dwarf2_attr (die, DW_AT_location, cu);
if (attr)
{
DW_ADDR (attr));
SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
break;
+ case DW_FORM_string:
case DW_FORM_strp:
/* DW_STRING is already allocated on the obstack, point directly
to it. */
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 builtin_type (gdbarch)->builtin_void;
+ return objfile_type (cu->objfile)->builtin_void;
}
else
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);
}
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);
}
this_type = read_type_die (die, cu);
if (!this_type)
{
- dump_die (die);
+ dump_die_for_error (die);
error (_("Dwarf Error: Cannot find type of die [in module %s]"),
cu->objfile->name);
}
break;
case DW_TAG_subprogram:
case DW_TAG_subroutine_type:
+ case DW_TAG_inlined_subroutine:
this_type = read_subroutine_type (die, cu);
break;
case DW_TAG_array_type:
else
sep = "::";
+ if (prefix == NULL)
+ prefix = "";
+ if (suffix == NULL)
+ suffix = "";
+
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);
-
+ strcpy (retval, prefix);
+ strcat (retval, sep);
+ strcat (retval, suffix);
return retval;
}
else
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
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>";
}
#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: ");
- fputs_filtered (paddress (DW_ADDR (&die->attrs[i])), 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 (struct die_info *die, struct dwarf2_cu *cu)
{
}
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;
queue_comp_unit (per_cu, this_cu->objfile);
}
+/* Follow reference attribute ATTR of SRC_DIE.
+ On entry *REF_CU is the CU of SRC_DIE.
+ On exit *REF_CU is the CU of the result. */
+
static struct die_info *
follow_die_ref (struct die_info *src_die, struct attribute *attr,
struct dwarf2_cu **ref_cu)
struct die_info temp_die;
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);
{
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)
+ if (dwarf2_per_objfile->macinfo.buffer == NULL)
{
complaint (&symfile_complaints, _("missing .debug_macinfo section"));
return;
}
- mac_ptr = dwarf2_per_objfile->macinfo_buffer + offset;
- mac_end = dwarf2_per_objfile->macinfo_buffer
- + dwarf2_per_objfile->macinfo_size;
+ /* 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.
- for (;;)
- {
- enum dwarf_macinfo_record_type macinfo_type;
+ To determine the base file name, we scan the macro definitions until we
+ reach the first DW_MACINFO_start_file entry. We then initialize
+ CURRENT_FILE accordingly so that any macro definition found before the
+ first DW_MACINFO_start_file can still be associated to the base file. */
+ mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
+ mac_end = dwarf2_per_objfile->macinfo.buffer
+ + dwarf2_per_objfile->macinfo.size;
+
+ do
+ {
/* Do we at least have room for a macinfo type byte? */
if (mac_ptr >= mac_end)
{
- 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*
/* ".debug_loc" may not exist at all, or the offset may be outside
the section. If so, fall through to the complaint in the
other branch. */
- && DW_UNSND (attr) < dwarf2_per_objfile->loc_size)
+ && DW_UNSND (attr) < dwarf2_per_objfile->loc.size)
{
struct dwarf2_loclist_baton *baton;
/* 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->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
+ baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
baton->base_address = cu->base_address;
if (cu->base_known == 0)
complaint (&symfile_complaints,
_("Location list used without specifying the CU base address."));
- SYMBOL_OPS (sym) = &dwarf2_loclist_funcs;
+ SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
SYMBOL_LOCATION_BATON (sym) = baton;
}
else
baton->data = NULL;
}
- SYMBOL_OPS (sym) = &dwarf2_locexpr_funcs;
+ SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
SYMBOL_LOCATION_BATON (sym) = baton;
}
}
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;
+ gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
struct comp_unit_head cu_header;
memset (&cu_header, 0, sizeof cu_header);
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;
}
return NULL;
}
-/* Set the mark field in CU and in every other compilation unit in the
- cache that we must keep because we are keeping CU. */
-
/* Add a dependence relationship from CU to REF_PER_CU. */
static void
*slot = ref_per_cu;
}
-/* Set the mark field in CU and in every other compilation unit in the
+/* Subroutine of dwarf2_mark to pass to htab_traverse.
+ Set the mark field in every compilation unit in the
cache that we must keep because we are keeping CU. */
static int
return 1;
}
+/* Set the mark field in CU and in every other compilation unit in the
+ cache that we must keep because we are keeping CU. */
+
static void
dwarf2_mark (struct dwarf2_cu *cu)
{
cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
}
+/* If section described by INFO was mmapped, munmap it now. */
+
+static void
+munmap_section_buffer (struct dwarf2_section_info *info)
+{
+ if (info->was_mmapped)
+ {
+#ifdef HAVE_MMAP
+ intptr_t begin = (intptr_t) info->buffer;
+ intptr_t map_begin = begin & ~(pagesize - 1);
+ size_t map_length = info->size + begin - map_begin;
+ gdb_assert (munmap ((void *) map_begin, map_length) == 0);
+#else
+ /* Without HAVE_MMAP, we should never be here to begin with. */
+ gdb_assert (0);
+#endif
+ }
+}
+
+/* munmap debug sections for OBJFILE, if necessary. */
+
+static void
+dwarf2_per_objfile_cleanup (struct objfile *objfile, void *d)
+{
+ struct dwarf2_per_objfile *data = d;
+ munmap_section_buffer (&data->info);
+ munmap_section_buffer (&data->abbrev);
+ munmap_section_buffer (&data->line);
+ munmap_section_buffer (&data->str);
+ munmap_section_buffer (&data->macinfo);
+ munmap_section_buffer (&data->ranges);
+ munmap_section_buffer (&data->loc);
+ munmap_section_buffer (&data->frame);
+ munmap_section_buffer (&data->eh_frame);
+}
+
void _initialize_dwarf2_read (void);
void
_initialize_dwarf2_read (void)
{
- dwarf2_objfile_data_key = register_objfile_data ();
+ dwarf2_objfile_data_key
+ = register_objfile_data_with_cleanup (dwarf2_per_objfile_cleanup);
add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
Set DWARF 2 specific variables.\n\
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