binutils-gdb/gdb/symmisc.c

774 lines
21 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* Do various things to symbol tables (other than lookup), for GDB.
Copyright (C) 1986-2000, 2002-2004, 2007-2012 Free Software
Foundation, Inc.
This file is part of GDB.
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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "bfd.h"
#include "filenames.h"
#include "symfile.h"
#include "objfiles.h"
#include "breakpoint.h"
#include "command.h"
#include "gdb_obstack.h"
#include "exceptions.h"
#include "language.h"
#include "bcache.h"
#include "block.h"
#include "gdb_regex.h"
#include "gdb_stat.h"
#include "dictionary.h"
#include "gdb_string.h"
#include "readline/readline.h"
#include "psymtab.h"
#ifndef DEV_TTY
#define DEV_TTY "/dev/tty"
#endif
/* Unfortunately for debugging, stderr is usually a macro. This is painful
when calling functions that take FILE *'s from the debugger.
So we make a variable which has the same value and which is accessible when
debugging GDB with itself. Because stdin et al need not be constants,
we initialize them in the _initialize_symmisc function at the bottom
of the file. */
FILE *std_in;
FILE *std_out;
FILE *std_err;
/* Prototypes for local functions */
static void dump_symtab (struct objfile *, struct symtab *,
struct ui_file *);
static void dump_msymbols (struct objfile *, struct ui_file *);
static void dump_objfile (struct objfile *);
static int block_depth (struct block *);
void _initialize_symmisc (void);
struct print_symbol_args
{
struct gdbarch *gdbarch;
struct symbol *symbol;
int depth;
struct ui_file *outfile;
};
static int print_symbol (void *);
void
print_symbol_bcache_statistics (void)
{
struct program_space *pspace;
struct objfile *objfile;
immediate_quit++;
ALL_PSPACES (pspace)
ALL_PSPACE_OBJFILES (pspace, objfile)
{
printf_filtered (_("Byte cache statistics for '%s':\n"), objfile->name);
print_bcache_statistics (psymbol_bcache_get_bcache (objfile->psymbol_cache),
"partial symbol cache");
print_bcache_statistics (objfile->macro_cache, "preprocessor macro cache");
print_bcache_statistics (objfile->filename_cache, "file name cache");
}
immediate_quit--;
}
void
print_objfile_statistics (void)
{
struct program_space *pspace;
struct objfile *objfile;
struct symtab *s;
int i, linetables, blockvectors;
immediate_quit++;
ALL_PSPACES (pspace)
ALL_PSPACE_OBJFILES (pspace, objfile)
{
printf_filtered (_("Statistics for '%s':\n"), objfile->name);
if (OBJSTAT (objfile, n_stabs) > 0)
printf_filtered (_(" Number of \"stab\" symbols read: %d\n"),
OBJSTAT (objfile, n_stabs));
if (OBJSTAT (objfile, n_minsyms) > 0)
printf_filtered (_(" Number of \"minimal\" symbols read: %d\n"),
OBJSTAT (objfile, n_minsyms));
if (OBJSTAT (objfile, n_psyms) > 0)
printf_filtered (_(" Number of \"partial\" symbols read: %d\n"),
OBJSTAT (objfile, n_psyms));
if (OBJSTAT (objfile, n_syms) > 0)
printf_filtered (_(" Number of \"full\" symbols read: %d\n"),
OBJSTAT (objfile, n_syms));
if (OBJSTAT (objfile, n_types) > 0)
printf_filtered (_(" Number of \"types\" defined: %d\n"),
OBJSTAT (objfile, n_types));
if (objfile->sf)
objfile->sf->qf->print_stats (objfile);
i = linetables = blockvectors = 0;
ALL_OBJFILE_SYMTABS (objfile, s)
{
i++;
if (s->linetable != NULL)
linetables++;
if (s->primary == 1)
blockvectors++;
}
printf_filtered (_(" Number of symbol tables: %d\n"), i);
printf_filtered (_(" Number of symbol tables with line tables: %d\n"),
linetables);
printf_filtered (_(" Number of symbol tables with blockvectors: %d\n"),
blockvectors);
if (OBJSTAT (objfile, sz_strtab) > 0)
printf_filtered (_(" Space used by a.out string tables: %d\n"),
OBJSTAT (objfile, sz_strtab));
printf_filtered (_(" Total memory used for objfile obstack: %d\n"),
obstack_memory_used (&objfile->objfile_obstack));
printf_filtered (_(" Total memory used for psymbol cache: %d\n"),
bcache_memory_used (psymbol_bcache_get_bcache
(objfile->psymbol_cache)));
printf_filtered (_(" Total memory used for macro cache: %d\n"),
bcache_memory_used (objfile->macro_cache));
printf_filtered (_(" Total memory used for file name cache: %d\n"),
bcache_memory_used (objfile->filename_cache));
}
immediate_quit--;
}
static void
dump_objfile (struct objfile *objfile)
{
struct symtab *symtab;
printf_filtered ("\nObject file %s: ", objfile->name);
printf_filtered ("Objfile at ");
gdb_print_host_address (objfile, gdb_stdout);
printf_filtered (", bfd at ");
gdb_print_host_address (objfile->obfd, gdb_stdout);
printf_filtered (", %d minsyms\n\n",
objfile->minimal_symbol_count);
if (objfile->sf)
objfile->sf->qf->dump (objfile);
if (objfile->symtabs)
{
printf_filtered ("Symtabs:\n");
for (symtab = objfile->symtabs;
symtab != NULL;
symtab = symtab->next)
{
printf_filtered ("%s at ", symtab->filename);
gdb_print_host_address (symtab, gdb_stdout);
printf_filtered (", ");
if (symtab->objfile != objfile)
{
printf_filtered ("NOT ON CHAIN! ");
}
wrap_here (" ");
}
printf_filtered ("\n\n");
}
}
/* Print minimal symbols from this objfile. */
static void
dump_msymbols (struct objfile *objfile, struct ui_file *outfile)
{
struct gdbarch *gdbarch = get_objfile_arch (objfile);
struct minimal_symbol *msymbol;
int index;
char ms_type;
fprintf_filtered (outfile, "\nObject file %s:\n\n", objfile->name);
if (objfile->minimal_symbol_count == 0)
{
fprintf_filtered (outfile, "No minimal symbols found.\n");
return;
}
index = 0;
ALL_OBJFILE_MSYMBOLS (objfile, msymbol)
{
struct obj_section *section = SYMBOL_OBJ_SECTION (msymbol);
switch (MSYMBOL_TYPE (msymbol))
{
case mst_unknown:
ms_type = 'u';
break;
case mst_text:
ms_type = 'T';
break;
case mst_text_gnu_ifunc:
ms_type = 'i';
break;
case mst_solib_trampoline:
ms_type = 'S';
break;
case mst_data:
ms_type = 'D';
break;
case mst_bss:
ms_type = 'B';
break;
case mst_abs:
ms_type = 'A';
break;
case mst_file_text:
ms_type = 't';
break;
case mst_file_data:
ms_type = 'd';
break;
case mst_file_bss:
ms_type = 'b';
break;
default:
ms_type = '?';
break;
}
fprintf_filtered (outfile, "[%2d] %c ", index, ms_type);
fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (msymbol)),
outfile);
fprintf_filtered (outfile, " %s", SYMBOL_LINKAGE_NAME (msymbol));
if (section)
fprintf_filtered (outfile, " section %s",
bfd_section_name (objfile->obfd,
section->the_bfd_section));
if (SYMBOL_DEMANGLED_NAME (msymbol) != NULL)
{
fprintf_filtered (outfile, " %s", SYMBOL_DEMANGLED_NAME (msymbol));
}
if (msymbol->filename)
fprintf_filtered (outfile, " %s", msymbol->filename);
fputs_filtered ("\n", outfile);
index++;
}
if (objfile->minimal_symbol_count != index)
{
warning (_("internal error: minimal symbol count %d != %d"),
objfile->minimal_symbol_count, index);
}
fprintf_filtered (outfile, "\n");
}
static void
dump_symtab_1 (struct objfile *objfile, struct symtab *symtab,
struct ui_file *outfile)
{
struct gdbarch *gdbarch = get_objfile_arch (objfile);
int i;
struct dict_iterator iter;
int len;
struct linetable *l;
struct blockvector *bv;
struct symbol *sym;
struct block *b;
int depth;
fprintf_filtered (outfile, "\nSymtab for file %s\n", symtab->filename);
if (symtab->dirname)
fprintf_filtered (outfile, "Compilation directory is %s\n",
symtab->dirname);
fprintf_filtered (outfile, "Read from object file %s (", objfile->name);
gdb_print_host_address (objfile, outfile);
fprintf_filtered (outfile, ")\n");
fprintf_filtered (outfile, "Language: %s\n",
language_str (symtab->language));
/* First print the line table. */
l = LINETABLE (symtab);
if (l)
{
fprintf_filtered (outfile, "\nLine table:\n\n");
len = l->nitems;
for (i = 0; i < len; i++)
{
fprintf_filtered (outfile, " line %d at ", l->item[i].line);
fputs_filtered (paddress (gdbarch, l->item[i].pc), outfile);
fprintf_filtered (outfile, "\n");
}
}
/* Now print the block info, but only for primary symtabs since we will
print lots of duplicate info otherwise. */
if (symtab->primary)
{
fprintf_filtered (outfile, "\nBlockvector:\n\n");
bv = BLOCKVECTOR (symtab);
len = BLOCKVECTOR_NBLOCKS (bv);
for (i = 0; i < len; i++)
{
b = BLOCKVECTOR_BLOCK (bv, i);
depth = block_depth (b) * 2;
print_spaces (depth, outfile);
fprintf_filtered (outfile, "block #%03d, object at ", i);
gdb_print_host_address (b, outfile);
if (BLOCK_SUPERBLOCK (b))
{
fprintf_filtered (outfile, " under ");
gdb_print_host_address (BLOCK_SUPERBLOCK (b), outfile);
}
/* drow/2002-07-10: We could save the total symbols count
even if we're using a hashtable, but nothing else but this message
wants it. */
fprintf_filtered (outfile, ", %d syms/buckets in ",
dict_size (BLOCK_DICT (b)));
fputs_filtered (paddress (gdbarch, BLOCK_START (b)), outfile);
fprintf_filtered (outfile, "..");
fputs_filtered (paddress (gdbarch, BLOCK_END (b)), outfile);
if (BLOCK_FUNCTION (b))
{
fprintf_filtered (outfile, ", function %s",
SYMBOL_LINKAGE_NAME (BLOCK_FUNCTION (b)));
if (SYMBOL_DEMANGLED_NAME (BLOCK_FUNCTION (b)) != NULL)
{
fprintf_filtered (outfile, ", %s",
SYMBOL_DEMANGLED_NAME (BLOCK_FUNCTION (b)));
}
}
fprintf_filtered (outfile, "\n");
/* Now print each symbol in this block (in no particular order, if
we're using a hashtable). */
ALL_BLOCK_SYMBOLS (b, iter, sym)
{
struct print_symbol_args s;
s.gdbarch = gdbarch;
s.symbol = sym;
s.depth = depth + 1;
s.outfile = outfile;
catch_errors (print_symbol, &s, "Error printing symbol:\n",
RETURN_MASK_ERROR);
}
}
fprintf_filtered (outfile, "\n");
}
else
{
fprintf_filtered (outfile, "\nBlockvector same as previous symtab\n\n");
}
}
static void
dump_symtab (struct objfile *objfile, struct symtab *symtab,
struct ui_file *outfile)
{
/* Set the current language to the language of the symtab we're dumping
because certain routines used during dump_symtab() use the current
language to print an image of the symbol. We'll restore it later.
But use only real languages, not placeholders. */
if (symtab->language != language_unknown
&& symtab->language != language_auto)
{
enum language saved_lang;
saved_lang = set_language (symtab->language);
dump_symtab_1 (objfile, symtab, outfile);
set_language (saved_lang);
}
else
dump_symtab_1 (objfile, symtab, outfile);
}
void
maintenance_print_symbols (char *args, int from_tty)
{
char **argv;
struct ui_file *outfile;
struct cleanup *cleanups;
char *symname = NULL;
char *filename = DEV_TTY;
struct objfile *objfile;
struct symtab *s;
dont_repeat ();
if (args == NULL)
{
error (_("Arguments missing: an output file name "
"and an optional symbol file name"));
}
argv = gdb_buildargv (args);
cleanups = make_cleanup_freeargv (argv);
if (argv[0] != NULL)
{
filename = argv[0];
/* If a second arg is supplied, it is a source file name to match on. */
if (argv[1] != NULL)
{
symname = argv[1];
}
}
filename = tilde_expand (filename);
make_cleanup (xfree, filename);
outfile = gdb_fopen (filename, FOPEN_WT);
if (outfile == 0)
perror_with_name (filename);
make_cleanup_ui_file_delete (outfile);
immediate_quit++;
ALL_SYMTABS (objfile, s)
if (symname == NULL || filename_cmp (symname, s->filename) == 0)
dump_symtab (objfile, s, outfile);
immediate_quit--;
do_cleanups (cleanups);
}
/* Print symbol ARGS->SYMBOL on ARGS->OUTFILE. ARGS->DEPTH says how
far to indent. ARGS is really a struct print_symbol_args *, but is
declared as char * to get it past catch_errors. Returns 0 for error,
1 for success. */
static int
print_symbol (void *args)
{
struct gdbarch *gdbarch = ((struct print_symbol_args *) args)->gdbarch;
struct symbol *symbol = ((struct print_symbol_args *) args)->symbol;
int depth = ((struct print_symbol_args *) args)->depth;
struct ui_file *outfile = ((struct print_symbol_args *) args)->outfile;
struct obj_section *section = SYMBOL_OBJ_SECTION (symbol);
print_spaces (depth, outfile);
if (SYMBOL_DOMAIN (symbol) == LABEL_DOMAIN)
{
fprintf_filtered (outfile, "label %s at ", SYMBOL_PRINT_NAME (symbol));
fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (symbol)),
outfile);
if (section)
fprintf_filtered (outfile, " section %s\n",
bfd_section_name (section->the_bfd_section->owner,
section->the_bfd_section));
else
fprintf_filtered (outfile, "\n");
return 1;
}
if (SYMBOL_DOMAIN (symbol) == STRUCT_DOMAIN)
{
if (TYPE_TAG_NAME (SYMBOL_TYPE (symbol)))
{
LA_PRINT_TYPE (SYMBOL_TYPE (symbol), "", outfile, 1, depth);
}
else
{
fprintf_filtered (outfile, "%s %s = ",
(TYPE_CODE (SYMBOL_TYPE (symbol)) == TYPE_CODE_ENUM
? "enum"
: (TYPE_CODE (SYMBOL_TYPE (symbol)) == TYPE_CODE_STRUCT
? "struct" : "union")),
SYMBOL_LINKAGE_NAME (symbol));
LA_PRINT_TYPE (SYMBOL_TYPE (symbol), "", outfile, 1, depth);
}
fprintf_filtered (outfile, ";\n");
}
else
{
if (SYMBOL_CLASS (symbol) == LOC_TYPEDEF)
fprintf_filtered (outfile, "typedef ");
if (SYMBOL_TYPE (symbol))
{
/* Print details of types, except for enums where it's clutter. */
LA_PRINT_TYPE (SYMBOL_TYPE (symbol), SYMBOL_PRINT_NAME (symbol),
outfile,
TYPE_CODE (SYMBOL_TYPE (symbol)) != TYPE_CODE_ENUM,
depth);
fprintf_filtered (outfile, "; ");
}
else
fprintf_filtered (outfile, "%s ", SYMBOL_PRINT_NAME (symbol));
switch (SYMBOL_CLASS (symbol))
{
case LOC_CONST:
fprintf_filtered (outfile, "const %ld (0x%lx)",
SYMBOL_VALUE (symbol),
SYMBOL_VALUE (symbol));
break;
case LOC_CONST_BYTES:
{
unsigned i;
struct type *type = check_typedef (SYMBOL_TYPE (symbol));
fprintf_filtered (outfile, "const %u hex bytes:",
TYPE_LENGTH (type));
for (i = 0; i < TYPE_LENGTH (type); i++)
fprintf_filtered (outfile, " %02x",
(unsigned) SYMBOL_VALUE_BYTES (symbol)[i]);
}
break;
case LOC_STATIC:
fprintf_filtered (outfile, "static at ");
fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (symbol)),
outfile);
if (section)
fprintf_filtered (outfile, " section %s",
bfd_section_name (section->the_bfd_section->owner,
section->the_bfd_section));
break;
case LOC_REGISTER:
if (SYMBOL_IS_ARGUMENT (symbol))
fprintf_filtered (outfile, "parameter register %ld",
SYMBOL_VALUE (symbol));
else
fprintf_filtered (outfile, "register %ld", SYMBOL_VALUE (symbol));
break;
case LOC_ARG:
fprintf_filtered (outfile, "arg at offset 0x%lx",
SYMBOL_VALUE (symbol));
break;
case LOC_REF_ARG:
fprintf_filtered (outfile, "reference arg at 0x%lx", SYMBOL_VALUE (symbol));
break;
case LOC_REGPARM_ADDR:
fprintf_filtered (outfile, "address parameter register %ld", SYMBOL_VALUE (symbol));
break;
case LOC_LOCAL:
fprintf_filtered (outfile, "local at offset 0x%lx",
SYMBOL_VALUE (symbol));
break;
case LOC_TYPEDEF:
break;
case LOC_LABEL:
fprintf_filtered (outfile, "label at ");
fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (symbol)),
outfile);
if (section)
fprintf_filtered (outfile, " section %s",
bfd_section_name (section->the_bfd_section->owner,
section->the_bfd_section));
break;
case LOC_BLOCK:
fprintf_filtered (outfile, "block object ");
gdb_print_host_address (SYMBOL_BLOCK_VALUE (symbol), outfile);
fprintf_filtered (outfile, ", ");
fputs_filtered (paddress (gdbarch,
BLOCK_START (SYMBOL_BLOCK_VALUE (symbol))),
outfile);
fprintf_filtered (outfile, "..");
fputs_filtered (paddress (gdbarch,
BLOCK_END (SYMBOL_BLOCK_VALUE (symbol))),
outfile);
if (section)
fprintf_filtered (outfile, " section %s",
bfd_section_name (section->the_bfd_section->owner,
section->the_bfd_section));
break;
case LOC_COMPUTED:
fprintf_filtered (outfile, "computed at runtime");
break;
case LOC_UNRESOLVED:
fprintf_filtered (outfile, "unresolved");
break;
case LOC_OPTIMIZED_OUT:
fprintf_filtered (outfile, "optimized out");
break;
default:
fprintf_filtered (outfile, "botched symbol class %x",
SYMBOL_CLASS (symbol));
break;
}
}
fprintf_filtered (outfile, "\n");
return 1;
}
void
maintenance_print_msymbols (char *args, int from_tty)
{
char **argv;
struct ui_file *outfile;
struct cleanup *cleanups;
char *filename = DEV_TTY;
char *symname = NULL;
struct program_space *pspace;
struct objfile *objfile;
struct stat sym_st, obj_st;
dont_repeat ();
if (args == NULL)
{
error (_("print-msymbols takes an output file "
"name and optional symbol file name"));
}
argv = gdb_buildargv (args);
cleanups = make_cleanup_freeargv (argv);
if (argv[0] != NULL)
{
filename = argv[0];
/* If a second arg is supplied, it is a source file name to match on. */
if (argv[1] != NULL)
{
symname = xfullpath (argv[1]);
make_cleanup (xfree, symname);
if (symname && stat (symname, &sym_st))
perror_with_name (symname);
}
}
filename = tilde_expand (filename);
make_cleanup (xfree, filename);
outfile = gdb_fopen (filename, FOPEN_WT);
if (outfile == 0)
perror_with_name (filename);
make_cleanup_ui_file_delete (outfile);
immediate_quit++;
ALL_PSPACES (pspace)
ALL_PSPACE_OBJFILES (pspace, objfile)
if (symname == NULL || (!stat (objfile->name, &obj_st)
&& sym_st.st_ino == obj_st.st_ino))
dump_msymbols (objfile, outfile);
immediate_quit--;
fprintf_filtered (outfile, "\n\n");
do_cleanups (cleanups);
}
void
maintenance_print_objfiles (char *ignore, int from_tty)
{
struct program_space *pspace;
struct objfile *objfile;
dont_repeat ();
immediate_quit++;
ALL_PSPACES (pspace)
ALL_PSPACE_OBJFILES (pspace, objfile)
dump_objfile (objfile);
immediate_quit--;
}
/* List all the symbol tables whose names match REGEXP (optional). */
void
maintenance_info_symtabs (char *regexp, int from_tty)
{
struct program_space *pspace;
struct objfile *objfile;
if (regexp)
re_comp (regexp);
ALL_PSPACES (pspace)
ALL_PSPACE_OBJFILES (pspace, objfile)
{
struct symtab *symtab;
/* We don't want to print anything for this objfile until we
actually find a symtab whose name matches. */
int printed_objfile_start = 0;
ALL_OBJFILE_SYMTABS (objfile, symtab)
{
QUIT;
if (! regexp
|| re_exec (symtab->filename))
{
if (! printed_objfile_start)
{
printf_filtered ("{ objfile %s ", objfile->name);
wrap_here (" ");
printf_filtered ("((struct objfile *) %s)\n",
host_address_to_string (objfile));
printed_objfile_start = 1;
}
printf_filtered (" { symtab %s ", symtab->filename);
wrap_here (" ");
printf_filtered ("((struct symtab *) %s)\n",
host_address_to_string (symtab));
printf_filtered (" dirname %s\n",
symtab->dirname ? symtab->dirname : "(null)");
printf_filtered (" fullname %s\n",
symtab->fullname ? symtab->fullname : "(null)");
printf_filtered (" "
"blockvector ((struct blockvector *) %s)%s\n",
host_address_to_string (symtab->blockvector),
symtab->primary ? " (primary)" : "");
printf_filtered (" "
"linetable ((struct linetable *) %s)\n",
host_address_to_string (symtab->linetable));
printf_filtered (" debugformat %s\n",
symtab->debugformat);
printf_filtered (" }\n");
}
}
if (printed_objfile_start)
printf_filtered ("}\n");
}
}
/* Return the nexting depth of a block within other blocks in its symtab. */
static int
block_depth (struct block *block)
{
int i = 0;
while ((block = BLOCK_SUPERBLOCK (block)) != NULL)
{
i++;
}
return i;
}
/* Do early runtime initializations. */
void
_initialize_symmisc (void)
{
std_in = stdin;
std_out = stdout;
std_err = stderr;
}