| /* corefile.c |
| |
| Copyright (C) 1999-2024 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); |
| |
| uint64_t addr; |
| sscanf (address, "%" SCNx64, &addr); |
| symtab.limit->addr = 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; |
| } |