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* dwarf2.c (read_abbrevs): If bfd_realloc fails, free currently allocated memory

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before returning.
  (decode_line_info): Likewise.
  (_bfd_dwarf2_cleanup_debug_info): New function:  Frees memory	allocated by
  functions in this file.
* elf-bfd.h (_bfd_dwarf2_cleanup_debug_info): Prototype.
* elf.c (bfd_elf_close_and_cleanup): Call _bfd_dwarf2_cleanup_debug_info.
This commit is contained in:
Nick Clifton 2005-05-05 14:25:23 +00:00
parent d8244a4aba
commit 35330cce1a
4 changed files with 115 additions and 13 deletions
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11
bfd/ChangeLog
View File

@ -1,3 +1,14 @@
2005-05-05 John Levon <levon@movementarian.org>
* dwarf2.c (read_abbrevs): If bfd_realloc fails, free currently
allocated memory before returning.
(decode_line_info): Likewise.
(_bfd_dwarf2_cleanup_debug_info): New function: Frees memory
allocated by functions in this file.
* elf-bfd.h (_bfd_dwarf2_cleanup_debug_info): Prototype.
* elf.c (bfd_elf_close_and_cleanup): Call
_bfd_dwarf2_cleanup_debug_info.
2005-05-05 Hans-Peter Nilsson <hp@axis.com>
* Makefile.am (INCLUDES): Don't -D_GNU_SOURCE here.

111
bfd/dwarf2.c
View File

@ -447,11 +447,28 @@ read_abbrevs (bfd *abfd, bfd_uint64_t offset, struct dwarf2_debug *stash)
{
if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0)
{
struct attr_abbrev *tmp;
amt = cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK;
amt *= sizeof (struct attr_abbrev);
cur_abbrev->attrs = bfd_realloc (cur_abbrev->attrs, amt);
if (! cur_abbrev->attrs)
return 0;
tmp = bfd_realloc (cur_abbrev->attrs, amt);
if (tmp == NULL)
{
size_t i;
for (i = 0; i < ABBREV_HASH_SIZE; i++)
{
struct abbrev_info *abbrev = abbrevs[i];
while (abbrev)
{
free (abbrev->attrs);
abbrev = abbrev->next;
}
}
return NULL;
}
cur_abbrev->attrs = tmp;
}
cur_abbrev->attrs[cur_abbrev->num_attrs].name
@ -963,11 +980,18 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash)
if ((table->num_dirs % DIR_ALLOC_CHUNK) == 0)
{
char **tmp;
amt = table->num_dirs + DIR_ALLOC_CHUNK;
amt *= sizeof (char *);
table->dirs = bfd_realloc (table->dirs, amt);
if (! table->dirs)
return 0;
tmp = bfd_realloc (table->dirs, amt);
if (tmp == NULL)
{
free (table->dirs);
return NULL;
}
table->dirs = tmp;
}
table->dirs[table->num_dirs++] = cur_dir;
@ -982,11 +1006,19 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash)
if ((table->num_files % FILE_ALLOC_CHUNK) == 0)
{
struct fileinfo *tmp;
amt = table->num_files + FILE_ALLOC_CHUNK;
amt *= sizeof (struct fileinfo);
table->files = bfd_realloc (table->files, amt);
if (! table->files)
return 0;
tmp = bfd_realloc (table->files, amt);
if (tmp == NULL)
{
free (table->files);
free (table->dirs);
return NULL;
}
table->files = tmp;
}
table->files[table->num_files].name = cur_file;
@ -1073,11 +1105,19 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash)
line_ptr += bytes_read;
if ((table->num_files % FILE_ALLOC_CHUNK) == 0)
{
struct fileinfo *tmp;
amt = table->num_files + FILE_ALLOC_CHUNK;
amt *= sizeof (struct fileinfo);
table->files = bfd_realloc (table->files, amt);
if (! table->files)
return 0;
tmp = bfd_realloc (table->files, amt);
if (tmp == NULL)
{
free (table->files);
free (table->dirs);
free (filename);
return NULL;
}
table->files = tmp;
}
table->files[table->num_files].name = cur_file;
table->files[table->num_files].dir =
@ -1094,7 +1134,10 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash)
default:
(*_bfd_error_handler) (_("Dwarf Error: mangled line number section."));
bfd_set_error (bfd_error_bad_value);
return 0;
free (filename);
free (table->files);
free (table->dirs);
return NULL;
}
break;
case DW_LNS_copy:
@ -2003,3 +2046,45 @@ _bfd_dwarf2_find_nearest_line (bfd *abfd,
return FALSE;
}
void
_bfd_dwarf2_cleanup_debug_info (bfd *abfd)
{
struct comp_unit *each;
struct dwarf2_debug *stash;
if (abfd == NULL || elf_tdata (abfd) == NULL)
return;
stash = elf_tdata (abfd)->dwarf2_find_line_info;
if (stash == NULL)
return;
for (each = stash->all_comp_units; each; each = each->next_unit)
{
struct abbrev_info **abbrevs = each->abbrevs;
size_t i;
for (i = 0; i < ABBREV_HASH_SIZE; i++)
{
struct abbrev_info *abbrev = abbrevs[i];
while (abbrev)
{
free (abbrev->attrs);
abbrev = abbrev->next;
}
}
if (each->line_table)
{
free (each->line_table->dirs);
free (each->line_table->files);
}
}
free (stash->dwarf_abbrev_buffer);
free (stash->dwarf_line_buffer);
free (stash->dwarf_ranges_buffer);
}

4
bfd/elf-bfd.h
View File

@ -1728,6 +1728,10 @@ extern int bfd_elf_link_record_local_dynamic_symbol
extern bfd_boolean _bfd_elf_close_and_cleanup
(bfd *);
extern void _bfd_dwarf2_cleanup_debug_info
(bfd *);
extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
(bfd *, arelent *, struct bfd_symbol *, void *,
asection *, bfd *, char **);

2
bfd/elf.c
View File

@ -6684,6 +6684,8 @@ _bfd_elf_close_and_cleanup (bfd *abfd)
_bfd_elf_strtab_free (elf_shstrtab (abfd));
}
_bfd_dwarf2_cleanup_debug_info (abfd);
return _bfd_generic_close_and_cleanup (abfd);
}