From 8af6b354b46907fab331b3cba5a812f97c732c88 Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Thu, 4 Mar 2010 04:01:53 +0000 Subject: [PATCH] PR 11302 * dwarf2.c (read_abbrevs): Return NULL on alloc failures. (read_attribute_value, decode_line_info): Likewise. (add_line_info, read_rangelist): Return FALSE on alloc failures. (arange_add, sort_line_sequences): Likewise. (find_abstract_instance_name): Handle failures from called funcs. (scan_unit_for_symbols, parse_comp_unit, decode_line_info): Likewise. (find_line): Realloc to a temp, and handle alloc fail. --- bfd/ChangeLog | 11 ++++ bfd/dwarf2.c | 179 +++++++++++++++++++++++++++++++++----------------- 2 files changed, 130 insertions(+), 60 deletions(-) diff --git a/bfd/ChangeLog b/bfd/ChangeLog index f592fbb1d0a..0d0316ec083 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,14 @@ +2010-03-04 Alan Modra + + PR 11302 + * dwarf2.c (read_abbrevs): Return NULL on alloc failures. + (read_attribute_value, decode_line_info): Likewise. + (add_line_info, read_rangelist): Return FALSE on alloc failures. + (arange_add, sort_line_sequences): Likewise. + (find_abstract_instance_name): Handle failures from called funcs. + (scan_unit_for_symbols, parse_comp_unit, decode_line_info): Likewise. + (find_line): Realloc to a temp, and handle alloc fail. + 2010-03-03 Daniel Jacobowitz * elf32-arm.c (elf32_arm_output_arch_local_syms): Do not add diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c index 89d9f4b01d6..1eae5e1b732 100644 --- a/bfd/dwarf2.c +++ b/bfd/dwarf2.c @@ -646,10 +646,12 @@ read_abbrevs (bfd *abfd, bfd_uint64_t offset, struct dwarf2_debug *stash) if (! read_section (abfd, ".debug_abbrev", ".zdebug_abbrev", stash->syms, offset, &stash->dwarf_abbrev_buffer, &stash->dwarf_abbrev_size)) - return 0; + return NULL; amt = sizeof (struct abbrev_info*) * ABBREV_HASH_SIZE; abbrevs = (struct abbrev_info **) bfd_zalloc (abfd, amt); + if (abbrevs == NULL) + return NULL; abbrev_ptr = stash->dwarf_abbrev_buffer + offset; abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); @@ -660,6 +662,8 @@ read_abbrevs (bfd *abfd, bfd_uint64_t offset, struct dwarf2_debug *stash) { amt = sizeof (struct abbrev_info); cur_abbrev = (struct abbrev_info *) bfd_zalloc (abfd, amt); + if (cur_abbrev == NULL) + return NULL; /* Read in abbrev header. */ cur_abbrev->number = abbrev_number; @@ -773,6 +777,8 @@ read_attribute_value (struct attribute *attr, case DW_FORM_block2: amt = sizeof (struct dwarf_block); blk = (struct dwarf_block *) bfd_alloc (abfd, amt); + if (blk == NULL) + return NULL; blk->size = read_2_bytes (abfd, info_ptr); info_ptr += 2; blk->data = read_n_bytes (abfd, info_ptr, blk->size); @@ -782,6 +788,8 @@ read_attribute_value (struct attribute *attr, case DW_FORM_block4: amt = sizeof (struct dwarf_block); blk = (struct dwarf_block *) bfd_alloc (abfd, amt); + if (blk == NULL) + return NULL; blk->size = read_4_bytes (abfd, info_ptr); info_ptr += 4; blk->data = read_n_bytes (abfd, info_ptr, blk->size); @@ -811,6 +819,8 @@ read_attribute_value (struct attribute *attr, case DW_FORM_block: amt = sizeof (struct dwarf_block); blk = (struct dwarf_block *) bfd_alloc (abfd, amt); + if (blk == NULL) + return NULL; blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); info_ptr += bytes_read; blk->data = read_n_bytes (abfd, info_ptr, blk->size); @@ -820,6 +830,8 @@ read_attribute_value (struct attribute *attr, case DW_FORM_block1: amt = sizeof (struct dwarf_block); blk = (struct dwarf_block *) bfd_alloc (abfd, amt); + if (blk == NULL) + return NULL; blk->size = read_1_byte (abfd, info_ptr); info_ptr += 1; blk->data = read_n_bytes (abfd, info_ptr, blk->size); @@ -987,7 +999,7 @@ new_line_sorts_after (struct line_info *new_line, struct line_info *line) highest to lowest VMA (with possible duplicates); that is, line_info->prev_line always accesses an equal or smaller VMA. */ -static void +static bfd_boolean add_line_info (struct line_info_table *table, bfd_vma address, char *filename, @@ -999,6 +1011,9 @@ add_line_info (struct line_info_table *table, struct line_sequence* seq = table->sequences; struct line_info* info = (struct line_info *) bfd_alloc (table->abfd, amt); + if (info == NULL) + return FALSE; + /* Set member data of 'info'. */ info->address = address; info->line = line; @@ -1008,8 +1023,9 @@ add_line_info (struct line_info_table *table, if (filename && filename[0]) { info->filename = (char *) bfd_alloc (table->abfd, strlen (filename) + 1); - if (info->filename) - strcpy (info->filename, filename); + if (info->filename == NULL) + return FALSE; + strcpy (info->filename, filename); } else info->filename = NULL; @@ -1045,6 +1061,8 @@ add_line_info (struct line_info_table *table, /* Start a new line sequence. */ amt = sizeof (struct line_sequence); seq = (struct line_sequence *) bfd_malloc (amt); + if (seq == NULL) + return FALSE; seq->low_pc = address; seq->prev_sequence = table->sequences; seq->last_line = info; @@ -1092,6 +1110,7 @@ add_line_info (struct line_info_table *table, if (address < seq->low_pc) seq->low_pc = address; } + return TRUE; } /* Extract a fully qualified filename from a line info table. @@ -1158,8 +1177,9 @@ concat_filename (struct line_info_table *table, unsigned int file) return strdup (filename); } -static void -arange_add (bfd *abfd, struct arange *first_arange, bfd_vma low_pc, bfd_vma high_pc) +static bfd_boolean +arange_add (bfd *abfd, struct arange *first_arange, + bfd_vma low_pc, bfd_vma high_pc) { struct arange *arange; @@ -1168,7 +1188,7 @@ arange_add (bfd *abfd, struct arange *first_arange, bfd_vma low_pc, bfd_vma high { first_arange->low = low_pc; first_arange->high = high_pc; - return; + return TRUE; } /* Next see if we can cheaply extend an existing range. */ @@ -1178,12 +1198,12 @@ arange_add (bfd *abfd, struct arange *first_arange, bfd_vma low_pc, bfd_vma high if (low_pc == arange->high) { arange->high = high_pc; - return; + return TRUE; } if (high_pc == arange->low) { arange->low = low_pc; - return; + return TRUE; } arange = arange->next; } @@ -1192,10 +1212,13 @@ arange_add (bfd *abfd, struct arange *first_arange, bfd_vma low_pc, bfd_vma high /* Need to allocate a new arange and insert it into the arange list. Order isn't significant, so just insert after the first arange. */ arange = (struct arange *) bfd_zalloc (abfd, sizeof (*arange)); + if (arange == NULL) + return FALSE; arange->low = low_pc; arange->high = high_pc; arange->next = first_arange->next; first_arange->next = arange; + return TRUE; } /* Compare function for line sequences. */ @@ -1224,7 +1247,7 @@ compare_sequences (const void* a, const void* b) /* Sort the line sequences for quick lookup. */ -static void +static bfd_boolean sort_line_sequences (struct line_info_table* table) { bfd_size_type amt; @@ -1235,11 +1258,13 @@ sort_line_sequences (struct line_info_table* table) bfd_vma last_high_pc; if (num_sequences == 0) - return; + return TRUE; /* Allocate space for an array of sequences. */ amt = sizeof (struct line_sequence) * num_sequences; sequences = (struct line_sequence *) bfd_alloc (table->abfd, amt); + if (sequences == NULL) + return FALSE; /* Copy the linked list into the array, freeing the original nodes. */ seq = table->sequences; @@ -1285,6 +1310,7 @@ sort_line_sequences (struct line_info_table* table) table->sequences = sequences; table->num_sequences = num_sequences; + return TRUE; } /* Decode the line number information for UNIT. */ @@ -1305,10 +1331,12 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) if (! read_section (abfd, ".debug_line", ".zdebug_line", stash->syms, unit->line_offset, &stash->dwarf_line_buffer, &stash->dwarf_line_size)) - return 0; + return NULL; amt = sizeof (struct line_info_table); table = (struct line_info_table *) bfd_alloc (abfd, amt); + if (table == NULL) + return NULL; table->abfd = abfd; table->comp_dir = unit->comp_dir; @@ -1385,10 +1413,7 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) tmp = (char **) bfd_realloc (table->dirs, amt); if (tmp == NULL) - { - free (table->dirs); - return NULL; - } + goto fail; table->dirs = tmp; } @@ -1411,11 +1436,7 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) tmp = (struct fileinfo *) bfd_realloc (table->files, amt); if (tmp == NULL) - { - free (table->files); - free (table->dirs); - return NULL; - } + goto fail; table->files = tmp; } @@ -1466,7 +1487,8 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) * lh.minimum_instruction_length; line += lh.line_base + (adj_opcode % lh.line_range); /* Append row to matrix using current values. */ - add_line_info (table, address, filename, line, column, 0); + if (!add_line_info (table, address, filename, line, column, 0)) + goto line_fail; if (address < low_pc) low_pc = address; if (address > high_pc) @@ -1484,13 +1506,15 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) { case DW_LNE_end_sequence: end_sequence = 1; - add_line_info (table, address, filename, line, column, - end_sequence); + if (!add_line_info (table, address, filename, line, column, + end_sequence)) + goto line_fail; if (address < low_pc) low_pc = address; if (address > high_pc) high_pc = address; - arange_add (unit->abfd, &unit->arange, low_pc, high_pc); + if (!arange_add (unit->abfd, &unit->arange, low_pc, high_pc)) + goto line_fail; break; case DW_LNE_set_address: address = read_address (unit, line_ptr); @@ -1507,12 +1531,7 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) amt *= sizeof (struct fileinfo); tmp = (struct fileinfo *) bfd_realloc (table->files, amt); if (tmp == NULL) - { - free (table->files); - free (table->dirs); - free (filename); - return NULL; - } + goto line_fail; table->files = tmp; } table->files[table->num_files].name = cur_file; @@ -1534,14 +1553,15 @@ 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); - free (filename); - free (table->files); - free (table->dirs); - return NULL; + line_fail: + if (filename != NULL) + free (filename); + goto fail; } break; case DW_LNS_copy: - add_line_info (table, address, filename, line, column, 0); + if (!add_line_info (table, address, filename, line, column, 0)) + goto line_fail; if (address < low_pc) low_pc = address; if (address > high_pc) @@ -1601,9 +1621,17 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) free (filename); } - sort_line_sequences (table); + if (sort_line_sequences (table)) + return table; - return table; + fail: + if (table->sequences != NULL) + free (table->sequences); + if (table->files != NULL) + free (table->files); + if (table->dirs != NULL) + free (table->dirs); + return NULL; } /* If ADDR is within TABLE set the output parameters and return TRUE, @@ -1838,7 +1866,10 @@ find_abstract_instance_name (struct comp_unit *unit, { for (i = 0; i < abbrev->num_attrs; ++i) { - info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr); + info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, + info_ptr); + if (info_ptr == NULL) + break; switch (attr.name) { case DW_AT_name: @@ -1858,11 +1889,12 @@ find_abstract_instance_name (struct comp_unit *unit, } } } - return (name); + return name; } -static void -read_rangelist (struct comp_unit *unit, struct arange *arange, bfd_uint64_t offset) +static bfd_boolean +read_rangelist (struct comp_unit *unit, struct arange *arange, + bfd_uint64_t offset) { bfd_byte *ranges_ptr; bfd_vma base_address = unit->base_address; @@ -1870,7 +1902,7 @@ read_rangelist (struct comp_unit *unit, struct arange *arange, bfd_uint64_t offs if (! unit->stash->dwarf_ranges_buffer) { if (! read_debug_ranges (unit)) - return; + return FALSE; } ranges_ptr = unit->stash->dwarf_ranges_buffer + offset; @@ -1889,8 +1921,13 @@ read_rangelist (struct comp_unit *unit, struct arange *arange, bfd_uint64_t offs if (low_pc == -1UL && high_pc != -1UL) base_address = high_pc; else - arange_add (unit->abfd, arange, base_address + low_pc, base_address + high_pc); + { + if (!arange_add (unit->abfd, arange, + base_address + low_pc, base_address + high_pc)) + return FALSE; + } } + return TRUE; } /* DWARF2 Compilation unit functions. */ @@ -1938,11 +1975,11 @@ scan_unit_for_symbols (struct comp_unit *unit) abbrev = lookup_abbrev (abbrev_number,unit->abbrevs); if (! abbrev) { - (*_bfd_error_handler) (_("Dwarf Error: Could not find abbrev number %u."), - abbrev_number); + (*_bfd_error_handler) + (_("Dwarf Error: Could not find abbrev number %u."), + abbrev_number); bfd_set_error (bfd_error_bad_value); - free (nested_funcs); - return FALSE; + goto fail; } var = NULL; @@ -1952,6 +1989,8 @@ scan_unit_for_symbols (struct comp_unit *unit) { bfd_size_type amt = sizeof (struct funcinfo); func = (struct funcinfo *) bfd_zalloc (abfd, amt); + if (func == NULL) + goto fail; func->tag = abbrev->tag; func->prev_func = unit->function_table; unit->function_table = func; @@ -1973,6 +2012,8 @@ scan_unit_for_symbols (struct comp_unit *unit) { bfd_size_type amt = sizeof (struct varinfo); var = (struct varinfo *) bfd_zalloc (abfd, amt); + if (var == NULL) + goto fail; var->tag = abbrev->tag; var->stack = 1; var->prev_var = unit->variable_table; @@ -1987,13 +2028,16 @@ scan_unit_for_symbols (struct comp_unit *unit) for (i = 0; i < abbrev->num_attrs; ++i) { info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr); + if (info_ptr == NULL) + return FALSE; if (func) { switch (attr.name) { case DW_AT_call_file: - func->caller_file = concat_filename (unit->line_table, attr.u.val); + func->caller_file = concat_filename (unit->line_table, + attr.u.val); break; case DW_AT_call_line: @@ -2023,7 +2067,8 @@ scan_unit_for_symbols (struct comp_unit *unit) break; case DW_AT_ranges: - read_rangelist (unit, &func->arange, attr.u.val); + if (!read_rangelist (unit, &func->arange, attr.u.val)) + goto fail; break; case DW_AT_decl_file: @@ -2098,7 +2143,8 @@ scan_unit_for_symbols (struct comp_unit *unit) if (func && high_pc != 0) { - arange_add (unit->abfd, &func->arange, low_pc, high_pc); + if (!arange_add (unit->abfd, &func->arange, low_pc, high_pc)) + goto fail; } if (abbrev->has_children) @@ -2114,10 +2160,7 @@ scan_unit_for_symbols (struct comp_unit *unit) bfd_realloc (nested_funcs, (nested_funcs_size * sizeof (struct funcinfo *))); if (tmp == NULL) - { - free (nested_funcs); - return FALSE; - } + goto fail; nested_funcs = tmp; } nested_funcs[nesting_level] = 0; @@ -2126,6 +2169,10 @@ scan_unit_for_symbols (struct comp_unit *unit) free (nested_funcs); return TRUE; + + fail: + free (nested_funcs); + return FALSE; } /* Parse a DWARF2 compilation unit starting at INFO_PTR. This @@ -2218,6 +2265,8 @@ parse_comp_unit (struct dwarf2_debug *stash, amt = sizeof (struct comp_unit); unit = (struct comp_unit *) bfd_zalloc (abfd, amt); + if (unit == NULL) + return NULL; unit->abfd = abfd; unit->version = version; unit->addr_size = addr_size; @@ -2231,6 +2280,8 @@ parse_comp_unit (struct dwarf2_debug *stash, for (i = 0; i < abbrev->num_attrs; ++i) { info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr); + if (info_ptr == NULL) + return NULL; /* Store the data if it is of an attribute we want to keep in a partial symbol table. */ @@ -2258,7 +2309,8 @@ parse_comp_unit (struct dwarf2_debug *stash, break; case DW_AT_ranges: - read_rangelist (unit, &unit->arange, attr.u.val); + if (!read_rangelist (unit, &unit->arange, attr.u.val)) + return NULL; break; case DW_AT_comp_dir: @@ -2283,7 +2335,8 @@ parse_comp_unit (struct dwarf2_debug *stash, } if (high_pc != 0) { - arange_add (unit->abfd, &unit->arange, low_pc, high_pc); + if (!arange_add (unit->abfd, &unit->arange, low_pc, high_pc)) + return NULL; } unit->first_child_die_ptr = info_ptr; @@ -3106,7 +3159,7 @@ find_line (bfd *abfd, msec = find_debug_info (debug_bfd, msec)) { bfd_size_type size = msec->size; - bfd_byte* buffer; + bfd_byte *buffer, *tmp; if (size == 0) continue; @@ -3124,8 +3177,14 @@ find_line (bfd *abfd, goto done; } } - stash->info_ptr_memory = (bfd_byte *) - bfd_realloc (stash->info_ptr_memory, total_size + size); + tmp = (bfd_byte *) bfd_realloc (stash->info_ptr_memory, + total_size + size); + if (tmp == NULL) + { + free (buffer); + goto done; + } + stash->info_ptr_memory = tmp; memcpy (stash->info_ptr_memory + total_size, buffer, size); free (buffer); total_size += size; -- 2.30.2