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- /* corefile.c
- Copyright (C) 1999-2022 Free Software Foundation, Inc.
- This file is part of GNU Binutils.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
- 02110-1301, USA. */
- #include "gprof.h"
- #include "libiberty.h"
- #include "filenames.h"
- #include "search_list.h"
- #include "source.h"
- #include "symtab.h"
- #include "hist.h"
- #include "corefile.h"
- #include "safe-ctype.h"
- #include <limits.h> /* For UINT_MAX. */
- bfd *core_bfd;
- static int core_num_syms;
- static asymbol **core_syms;
- asection *core_text_sect;
- void * core_text_space;
- static int min_insn_size;
- int offset_to_code;
- /* For mapping symbols to specific .o files during file ordering. */
- struct function_map * symbol_map;
- unsigned int symbol_map_count;
- static void read_function_mappings (const char *);
- static int core_sym_class (asymbol *);
- static bool get_src_info
- (bfd_vma, const char **, const char **, int *);
- extern void i386_find_call (Sym *, bfd_vma, bfd_vma);
- extern void alpha_find_call (Sym *, bfd_vma, bfd_vma);
- extern void vax_find_call (Sym *, bfd_vma, bfd_vma);
- extern void sparc_find_call (Sym *, bfd_vma, bfd_vma);
- extern void mips_find_call (Sym *, bfd_vma, bfd_vma);
- extern void aarch64_find_call (Sym *, bfd_vma, bfd_vma);
- static void
- parse_error (const char *filename)
- {
- fprintf (stderr, _("%s: unable to parse mapping file %s.\n"), whoami, filename);
- done (1);
- }
- /* Compare two function_map structs based on function name.
- We want to sort in ascending order. */
- static int
- cmp_symbol_map (const void * l, const void * r)
- {
- return strcmp (((struct function_map *) l)->function_name,
- ((struct function_map *) r)->function_name);
- }
- #define BUFSIZE (1024)
- /* This is BUFSIZE - 1 as a string. Suitable for use in fprintf/sscanf format strings. */
- #define STR_BUFSIZE "1023"
- static void
- read_function_mappings (const char *filename)
- {
- FILE * file = fopen (filename, "r");
- char dummy[BUFSIZE];
- int count = 0;
- unsigned int i;
- if (!file)
- {
- fprintf (stderr, _("%s: could not open %s.\n"), whoami, filename);
- done (1);
- }
- /* First parse the mapping file so we know how big we need to
- make our tables. We also do some sanity checks at this
- time. */
- while (!feof (file))
- {
- int matches;
- matches = fscanf (file, "%" STR_BUFSIZE "[^\n:]", dummy);
- if (!matches)
- parse_error (filename);
- /* Just skip messages about files with no symbols. */
- if (!strncmp (dummy, "No symbols in ", 14))
- {
- matches = fscanf (file, "\n");
- if (matches == EOF)
- parse_error (filename);
- continue;
- }
- /* Don't care what else is on this line at this point. */
- matches = fscanf (file, "%" STR_BUFSIZE "[^\n]\n", dummy);
- if (!matches)
- parse_error (filename);
- count++;
- }
- /* Now we know how big we need to make our table. */
- symbol_map = ((struct function_map *)
- xmalloc (count * sizeof (struct function_map)));
- /* Rewind the input file so we can read it again. */
- rewind (file);
- /* Read each entry and put it into the table. */
- count = 0;
- while (!feof (file))
- {
- int matches;
- char *tmp;
- matches = fscanf (file, "%" STR_BUFSIZE "[^\n:]", dummy);
- if (!matches)
- parse_error (filename);
- /* Just skip messages about files with no symbols. */
- if (!strncmp (dummy, "No symbols in ", 14))
- {
- matches = fscanf (file, "\n");
- if (matches == EOF)
- parse_error (filename);
- continue;
- }
- /* dummy has the filename, go ahead and copy it. */
- symbol_map[count].file_name = (char *) xmalloc (strlen (dummy) + 1);
- strcpy (symbol_map[count].file_name, dummy);
- /* Now we need the function name. */
- matches = fscanf (file, "%" STR_BUFSIZE "[^\n]\n", dummy);
- if (!matches)
- parse_error (filename);
- tmp = strrchr (dummy, ' ') + 1;
- symbol_map[count].function_name = (char *) xmalloc (strlen (tmp) + 1);
- strcpy (symbol_map[count].function_name, tmp);
- count++;
- }
- /* Record the size of the map table for future reference. */
- symbol_map_count = count;
- for (i = 0; i < symbol_map_count; ++i)
- if (i == 0
- || filename_cmp (symbol_map[i].file_name, symbol_map[i - 1].file_name))
- symbol_map[i].is_first = 1;
- qsort (symbol_map, symbol_map_count, sizeof (struct function_map), cmp_symbol_map);
- fclose (file);
- }
- void
- core_init (const char * aout_name)
- {
- int core_sym_bytes;
- asymbol *synthsyms;
- long synth_count;
- core_bfd = bfd_openr (aout_name, 0);
- if (!core_bfd)
- {
- perror (aout_name);
- done (1);
- }
- core_bfd->flags |= BFD_DECOMPRESS;
- if (!bfd_check_format (core_bfd, bfd_object))
- {
- fprintf (stderr, _("%s: %s: not in executable format\n"), whoami, aout_name);
- done (1);
- }
- /* Get core's text section. */
- core_text_sect = bfd_get_section_by_name (core_bfd, ".text");
- if (!core_text_sect)
- {
- core_text_sect = bfd_get_section_by_name (core_bfd, "$CODE$");
- if (!core_text_sect)
- {
- fprintf (stderr, _("%s: can't find .text section in %s\n"),
- whoami, aout_name);
- done (1);
- }
- }
- /* Read core's symbol table. */
- /* This will probably give us more than we need, but that's ok. */
- core_sym_bytes = bfd_get_symtab_upper_bound (core_bfd);
- if (core_sym_bytes < 0)
- {
- fprintf (stderr, "%s: %s: %s\n", whoami, aout_name,
- bfd_errmsg (bfd_get_error ()));
- done (1);
- }
- core_syms = (asymbol **) xmalloc (core_sym_bytes);
- core_num_syms = bfd_canonicalize_symtab (core_bfd, core_syms);
- if (core_num_syms < 0)
- {
- fprintf (stderr, "%s: %s: %s\n", whoami, aout_name,
- bfd_errmsg (bfd_get_error ()));
- done (1);
- }
- synth_count = bfd_get_synthetic_symtab (core_bfd, core_num_syms, core_syms,
- 0, NULL, &synthsyms);
- if (synth_count > 0)
- {
- asymbol **symp;
- long new_size;
- long i;
- new_size = (core_num_syms + synth_count + 1) * sizeof (*core_syms);
- core_syms = (asymbol **) xrealloc (core_syms, new_size);
- symp = core_syms + core_num_syms;
- core_num_syms += synth_count;
- for (i = 0; i < synth_count; i++)
- *symp++ = synthsyms + i;
- *symp = 0;
- }
- min_insn_size = 1;
- offset_to_code = 0;
- switch (bfd_get_arch (core_bfd))
- {
- case bfd_arch_vax:
- offset_to_code = 2;
- break;
- case bfd_arch_alpha:
- min_insn_size = 4;
- break;
- default:
- break;
- }
- if (function_mapping_file)
- read_function_mappings (function_mapping_file);
- }
- /* Read in the text space of an a.out file. */
- void
- core_get_text_space (bfd *cbfd)
- {
- core_text_space = malloc (bfd_section_size (core_text_sect));
- if (!core_text_space)
- {
- fprintf (stderr, _("%s: ran out room for %lu bytes of text space\n"),
- whoami, (unsigned long) bfd_section_size (core_text_sect));
- done (1);
- }
- if (!bfd_get_section_contents (cbfd, core_text_sect, core_text_space,
- 0, bfd_section_size (core_text_sect)))
- {
- bfd_perror ("bfd_get_section_contents");
- free (core_text_space);
- core_text_space = 0;
- }
- if (!core_text_space)
- fprintf (stderr, _("%s: can't do -c\n"), whoami);
- }
- void
- find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
- {
- if (core_text_space == 0)
- return;
- hist_clip_symbol_address (&p_lowpc, &p_highpc);
- switch (bfd_get_arch (core_bfd))
- {
- case bfd_arch_i386:
- i386_find_call (parent, p_lowpc, p_highpc);
- break;
- case bfd_arch_alpha:
- alpha_find_call (parent, p_lowpc, p_highpc);
- break;
- case bfd_arch_vax:
- vax_find_call (parent, p_lowpc, p_highpc);
- break;
- case bfd_arch_sparc:
- sparc_find_call (parent, p_lowpc, p_highpc);
- break;
- case bfd_arch_mips:
- mips_find_call (parent, p_lowpc, p_highpc);
- break;
- case bfd_arch_aarch64:
- aarch64_find_call (parent, p_lowpc, p_highpc);
- break;
- default:
- fprintf (stderr, _("%s: -c not supported on architecture %s\n"),
- whoami, bfd_printable_name(core_bfd));
- /* Don't give the error more than once. */
- ignore_direct_calls = false;
- }
- }
- /* Return class of symbol SYM. The returned class can be any of:
- 0 -> symbol is not interesting to us
- 'T' -> symbol is a global name
- 't' -> symbol is a local (static) name. */
- static int
- core_sym_class (asymbol *sym)
- {
- symbol_info syminfo;
- const char *name;
- char sym_prefix;
- int i;
- if (sym->section == NULL || (sym->flags & BSF_DEBUGGING) != 0)
- return 0;
- /* Must be a text symbol, and static text symbols
- don't qualify if ignore_static_funcs set. */
- if (ignore_static_funcs && (sym->flags & BSF_LOCAL))
- {
- DBG (AOUTDEBUG, printf ("[core_sym_class] %s: not a function\n",
- sym->name));
- return 0;
- }
- bfd_get_symbol_info (core_bfd, sym, &syminfo);
- i = syminfo.type;
- if (i == 'T')
- return i; /* It's a global symbol. */
- if (i == 'W')
- /* Treat weak symbols as text symbols. FIXME: a weak symbol may
- also be a data symbol. */
- return 'T';
- if (i != 't')
- {
- /* Not a static text symbol. */
- DBG (AOUTDEBUG, printf ("[core_sym_class] %s is of class %c\n",
- sym->name, i));
- return 0;
- }
- /* Do some more filtering on static function-names. */
- if (ignore_static_funcs)
- return 0;
- /* Can't zero-length name or funny characters in name, where
- `funny' includes: `.' (.o file names) and `$' (Pascal labels). */
- if (!sym->name || sym->name[0] == '\0')
- return 0;
- for (name = sym->name; *name; ++name)
- {
- if (*name == '$')
- return 0;
- while (*name == '.')
- {
- /* Allow both nested subprograms (which end with ".NNN", where N is
- a digit) and GCC cloned functions (which contain ".clone").
- Allow for multiple iterations of both - apparently GCC can clone
- clones and subprograms. */
- int digit_seen = 0;
- #define CLONE_NAME ".clone."
- #define CLONE_NAME_LEN strlen (CLONE_NAME)
- #define CONSTPROP_NAME ".constprop."
- #define CONSTPROP_NAME_LEN strlen (CONSTPROP_NAME)
- if (strlen (name) > CLONE_NAME_LEN
- && strncmp (name, CLONE_NAME, CLONE_NAME_LEN) == 0)
- name += CLONE_NAME_LEN - 1;
- else if (strlen (name) > CONSTPROP_NAME_LEN
- && strncmp (name, CONSTPROP_NAME, CONSTPROP_NAME_LEN) == 0)
- name += CONSTPROP_NAME_LEN - 1;
- for (name++; *name; name++)
- if (digit_seen && *name == '.')
- break;
- else if (ISDIGIT (*name))
- digit_seen = 1;
- else
- return 0;
- }
- }
- /* On systems where the C compiler adds an underscore to all
- names, static names without underscores seem usually to be
- labels in hand written assembler in the library. We don't want
- these names. This is certainly necessary on a Sparc running
- SunOS 4.1 (try profiling a program that does a lot of
- division). I don't know whether it has harmful side effects on
- other systems. Perhaps it should be made configurable. */
- sym_prefix = bfd_get_symbol_leading_char (core_bfd);
- if ((sym_prefix && sym_prefix != sym->name[0])
- /* GCC may add special symbols to help gdb figure out the file
- language. We want to ignore these, since sometimes they mask
- the real function. (dj@ctron) */
- || !strncmp (sym->name, "__gnu_compiled", 14)
- || !strncmp (sym->name, "___gnu_compiled", 15))
- {
- return 0;
- }
- /* If the object file supports marking of function symbols, then
- we can zap anything that doesn't have BSF_FUNCTION set. */
- if (ignore_non_functions && (sym->flags & BSF_FUNCTION) == 0)
- return 0;
- return 't'; /* It's a static text symbol. */
- }
- /* Get whatever source info we can get regarding address ADDR. */
- static bool
- get_src_info (bfd_vma addr, const char **filename, const char **name,
- int *line_num)
- {
- const char *fname = 0, *func_name = 0;
- int l = 0;
- if (bfd_find_nearest_line (core_bfd, core_text_sect, core_syms,
- addr - core_text_sect->vma,
- &fname, &func_name, (unsigned int *) &l)
- && fname && func_name && l)
- {
- DBG (AOUTDEBUG, printf ("[get_src_info] 0x%lx -> %s:%d (%s)\n",
- (unsigned long) addr, fname, l, func_name));
- *filename = fname;
- *name = func_name;
- *line_num = l;
- return true;
- }
- else
- {
- DBG (AOUTDEBUG, printf ("[get_src_info] no info for 0x%lx (%s:%d,%s)\n",
- (unsigned long) addr,
- fname ? fname : "<unknown>", l,
- func_name ? func_name : "<unknown>"));
- return false;
- }
- }
- static char buf[BUFSIZE];
- static char address[BUFSIZE];
- static char name[BUFSIZE];
- /* Return number of symbols in a symbol-table file. */
- static unsigned int
- num_of_syms_in (FILE * f)
- {
- char type;
- unsigned int num = 0;
- while (!feof (f) && fgets (buf, BUFSIZE - 1, f))
- {
- if (sscanf (buf, "%" STR_BUFSIZE "s %c %" STR_BUFSIZE "s", address, &type, name) == 3)
- if (type == 't' || type == 'T')
- {
- /* PR 20499 - prevent integer overflow computing argument to xmalloc. */
- if (++num >= UINT_MAX / sizeof (Sym))
- return -1U;
- }
- }
- return num;
- }
- /* Read symbol table from a file. */
- void
- core_create_syms_from (const char * sym_table_file)
- {
- char type;
- bfd_vma min_vma = ~(bfd_vma) 0;
- bfd_vma max_vma = 0;
- FILE * f;
- f = fopen (sym_table_file, "r");
- if (!f)
- {
- fprintf (stderr, _("%s: could not open %s.\n"), whoami, sym_table_file);
- done (1);
- }
- /* Pass 1 - determine upper bound on number of function names. */
- symtab.len = num_of_syms_in (f);
- if (symtab.len == 0)
- {
- fprintf (stderr, _("%s: file `%s' has no symbols\n"), whoami, sym_table_file);
- done (1);
- }
- else if (symtab.len == -1U)
- {
- fprintf (stderr, _("%s: file `%s' has too many symbols\n"),
- whoami, sym_table_file);
- done (1);
- }
- symtab.base = (Sym *) xmalloc (symtab.len * sizeof (Sym));
- /* Pass 2 - create symbols. */
- symtab.limit = symtab.base;
- if (fseek (f, 0, SEEK_SET) != 0)
- {
- perror (sym_table_file);
- done (1);
- }
- while (!feof (f) && fgets (buf, BUFSIZE - 1, f))
- {
- if (sscanf (buf, "%" STR_BUFSIZE "s %c %" STR_BUFSIZE "s", address, &type, name) != 3)
- continue;
- if (type != 't' && type != 'T')
- continue;
- sym_init (symtab.limit);
- sscanf (address, "%" BFD_VMA_FMT "x", &(symtab.limit->addr) );
- symtab.limit->name = (char *) xmalloc (strlen (name) + 1);
- strcpy ((char *) symtab.limit->name, name);
- symtab.limit->mapped = 0;
- symtab.limit->is_func = true;
- symtab.limit->is_bb_head = true;
- symtab.limit->is_static = (type == 't');
- min_vma = MIN (symtab.limit->addr, min_vma);
- max_vma = MAX (symtab.limit->addr, max_vma);
- ++symtab.limit;
- }
- fclose (f);
- symtab.len = symtab.limit - symtab.base;
- symtab_finalize (&symtab);
- }
- static int
- search_mapped_symbol (const void * l, const void * r)
- {
- return strcmp ((const char *) l, ((const struct function_map *) r)->function_name);
- }
- /* Read in symbol table from core.
- One symbol per function is entered. */
- void
- core_create_function_syms (void)
- {
- bfd_vma min_vma = ~ (bfd_vma) 0;
- bfd_vma max_vma = 0;
- int cxxclass;
- long i;
- struct function_map * found = NULL;
- int core_has_func_syms = 0;
- switch (core_bfd->xvec->flavour)
- {
- default:
- break;
- case bfd_target_coff_flavour:
- case bfd_target_ecoff_flavour:
- case bfd_target_xcoff_flavour:
- case bfd_target_elf_flavour:
- case bfd_target_som_flavour:
- core_has_func_syms = 1;
- }
- /* Pass 1 - determine upper bound on number of function names. */
- symtab.len = 0;
- for (i = 0; i < core_num_syms; ++i)
- {
- if (!core_sym_class (core_syms[i]))
- continue;
- /* Don't create a symtab entry for a function that has
- a mapping to a file, unless it's the first function
- in the file. */
- if (symbol_map_count != 0)
- {
- /* Note: some systems (SunOS 5.8) crash if bsearch base argument
- is NULL. */
- found = (struct function_map *) bsearch
- (core_syms[i]->name, symbol_map, symbol_map_count,
- sizeof (struct function_map), search_mapped_symbol);
- }
- if (found == NULL || found->is_first)
- ++symtab.len;
- }
- if (symtab.len == 0)
- {
- fprintf (stderr, _("%s: file `%s' has no symbols\n"), whoami, a_out_name);
- done (1);
- }
- symtab.base = (Sym *) xmalloc (symtab.len * sizeof (Sym));
- /* Pass 2 - create symbols. */
- symtab.limit = symtab.base;
- for (i = 0; i < core_num_syms; ++i)
- {
- asection *sym_sec;
- cxxclass = core_sym_class (core_syms[i]);
- if (!cxxclass)
- {
- DBG (AOUTDEBUG,
- printf ("[core_create_function_syms] rejecting: 0x%lx %s\n",
- (unsigned long) core_syms[i]->value,
- core_syms[i]->name));
- continue;
- }
- if (symbol_map_count != 0)
- {
- /* Note: some systems (SunOS 5.8) crash if bsearch base argument
- is NULL. */
- found = (struct function_map *) bsearch
- (core_syms[i]->name, symbol_map, symbol_map_count,
- sizeof (struct function_map), search_mapped_symbol);
- }
- if (found && ! found->is_first)
- continue;
- sym_init (symtab.limit);
- /* Symbol offsets are always section-relative. */
- sym_sec = core_syms[i]->section;
- symtab.limit->addr = core_syms[i]->value;
- if (sym_sec)
- symtab.limit->addr += bfd_section_vma (sym_sec);
- if (found)
- {
- symtab.limit->name = found->file_name;
- symtab.limit->mapped = 1;
- }
- else
- {
- symtab.limit->name = core_syms[i]->name;
- symtab.limit->mapped = 0;
- }
- /* Lookup filename and line number, if we can. */
- {
- const char * filename;
- const char * func_name;
- if (get_src_info (symtab.limit->addr, & filename, & func_name,
- & symtab.limit->line_num))
- {
- symtab.limit->file = source_file_lookup_path (filename);
- /* FIXME: Checking __osf__ here does not work with a cross
- gprof. */
- #ifdef __osf__
- /* Suppress symbols that are not function names. This is
- useful to suppress code-labels and aliases.
- This is known to be useful under DEC's OSF/1. Under SunOS 4.x,
- labels do not appear in the symbol table info, so this isn't
- necessary. */
- if (strcmp (symtab.limit->name, func_name) != 0)
- {
- /* The symbol's address maps to a different name, so
- it can't be a function-entry point. This happens
- for labels, for example. */
- DBG (AOUTDEBUG,
- printf ("[core_create_function_syms: rej %s (maps to %s)\n",
- symtab.limit->name, func_name));
- continue;
- }
- #endif
- }
- }
- symtab.limit->is_func = (!core_has_func_syms
- || (core_syms[i]->flags & BSF_FUNCTION) != 0);
- symtab.limit->is_bb_head = true;
- if (cxxclass == 't')
- symtab.limit->is_static = true;
- /* Keep track of the minimum and maximum vma addresses used by all
- symbols. When computing the max_vma, use the ending address of the
- section containing the symbol, if available. */
- min_vma = MIN (symtab.limit->addr, min_vma);
- if (sym_sec)
- max_vma = MAX (bfd_section_vma (sym_sec)
- + bfd_section_size (sym_sec) - 1,
- max_vma);
- else
- max_vma = MAX (symtab.limit->addr, max_vma);
- DBG (AOUTDEBUG, printf ("[core_create_function_syms] %ld %s 0x%lx\n",
- (long) (symtab.limit - symtab.base),
- symtab.limit->name,
- (unsigned long) symtab.limit->addr));
- ++symtab.limit;
- }
- symtab.len = symtab.limit - symtab.base;
- symtab_finalize (&symtab);
- }
- /* Read in symbol table from core.
- One symbol per line of source code is entered. */
- void
- core_create_line_syms (void)
- {
- char *prev_name, *prev_filename;
- unsigned int prev_name_len, prev_filename_len;
- bfd_vma vma, min_vma = ~(bfd_vma) 0, max_vma = 0;
- Sym *prev, dummy, *sym;
- const char *filename;
- int prev_line_num;
- Sym_Table ltab;
- bfd_vma vma_high;
- /* Create symbols for functions as usual. This is necessary in
- cases where parts of a program were not compiled with -g. For
- those parts we still want to get info at the function level. */
- core_create_function_syms ();
- /* Pass 1: count the number of symbols. */
- /* To find all line information, walk through all possible
- text-space addresses (one by one!) and get the debugging
- info for each address. When the debugging info changes,
- it is time to create a new symbol.
- Of course, this is rather slow and it would be better if
- BFD would provide an iterator for enumerating all line infos. */
- prev_name_len = 1024;
- prev_filename_len = 1024;
- prev_name = (char *) xmalloc (prev_name_len);
- prev_filename = (char *) xmalloc (prev_filename_len);
- ltab.len = 0;
- prev_line_num = 0;
- vma_high = core_text_sect->vma + bfd_section_size (core_text_sect);
- for (vma = core_text_sect->vma; vma < vma_high; vma += min_insn_size)
- {
- unsigned int len;
- if (!get_src_info (vma, &filename, &dummy.name, &dummy.line_num)
- || (prev_line_num == dummy.line_num
- && prev_name != NULL
- && strcmp (prev_name, dummy.name) == 0
- && filename_cmp (prev_filename, filename) == 0))
- continue;
- ++ltab.len;
- prev_line_num = dummy.line_num;
- len = strlen (dummy.name);
- if (len >= prev_name_len)
- {
- prev_name_len = len + 1024;
- free (prev_name);
- prev_name = (char *) xmalloc (prev_name_len);
- }
- strcpy (prev_name, dummy.name);
- len = strlen (filename);
- if (len >= prev_filename_len)
- {
- prev_filename_len = len + 1024;
- free (prev_filename);
- prev_filename = (char *) xmalloc (prev_filename_len);
- }
- strcpy (prev_filename, filename);
- min_vma = MIN (vma, min_vma);
- max_vma = MAX (vma, max_vma);
- }
- free (prev_name);
- free (prev_filename);
- /* Make room for function symbols, too. */
- ltab.len += symtab.len;
- ltab.base = (Sym *) xmalloc (ltab.len * sizeof (Sym));
- ltab.limit = ltab.base;
- /* Pass 2 - create symbols. */
- /* We now set is_static as we go along, rather than by running
- through the symbol table at the end.
- The old way called symtab_finalize before the is_static pass,
- causing a problem since symtab_finalize uses is_static as part of
- its address conflict resolution algorithm. Since global symbols
- were preferred over static symbols, and all line symbols were
- global at that point, static function names that conflicted with
- their own line numbers (static, but labeled as global) were
- rejected in favor of the line num.
- This was not the desired functionality. We always want to keep
- our function symbols and discard any conflicting line symbols.
- Perhaps symtab_finalize should be modified to make this
- distinction as well, but the current fix works and the code is a
- lot cleaner now. */
- prev = 0;
- for (vma = core_text_sect->vma; vma < vma_high; vma += min_insn_size)
- {
- sym_init (ltab.limit);
- if (!get_src_info (vma, &filename, <ab.limit->name, <ab.limit->line_num)
- || (prev && prev->line_num == ltab.limit->line_num
- && strcmp (prev->name, ltab.limit->name) == 0
- && filename_cmp (prev->file->name, filename) == 0))
- continue;
- /* Make name pointer a malloc'ed string. */
- ltab.limit->name = xstrdup (ltab.limit->name);
- ltab.limit->file = source_file_lookup_path (filename);
- ltab.limit->addr = vma;
- /* Set is_static based on the enclosing function, using either:
- 1) the previous symbol, if it's from the same function, or
- 2) a symtab lookup. */
- if (prev && ltab.limit->file == prev->file &&
- strcmp (ltab.limit->name, prev->name) == 0)
- {
- ltab.limit->is_static = prev->is_static;
- }
- else
- {
- sym = sym_lookup(&symtab, ltab.limit->addr);
- if (sym)
- ltab.limit->is_static = sym->is_static;
- }
- prev = ltab.limit;
- DBG (AOUTDEBUG, printf ("[core_create_line_syms] %lu %s 0x%lx\n",
- (unsigned long) (ltab.limit - ltab.base),
- ltab.limit->name,
- (unsigned long) ltab.limit->addr));
- ++ltab.limit;
- }
- /* Copy in function symbols. */
- memcpy (ltab.limit, symtab.base, symtab.len * sizeof (Sym));
- ltab.limit += symtab.len;
- if ((unsigned int) (ltab.limit - ltab.base) != ltab.len)
- {
- fprintf (stderr,
- _("%s: somebody miscounted: ltab.len=%d instead of %ld\n"),
- whoami, ltab.len, (long) (ltab.limit - ltab.base));
- done (1);
- }
- /* Finalize ltab and make it symbol table. */
- symtab_finalize (<ab);
- free (symtab.base);
- symtab = ltab;
- }
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