700 lines
21 KiB
C
700 lines
21 KiB
C
/* Debug logging for the symbol file functions for the GNU debugger, GDB.
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Copyright (C) 2013-2016 Free Software Foundation, Inc.
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Contributed by Cygnus Support, using pieces from other GDB modules.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Note: Be careful with functions that can throw errors.
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We want to see a logging message regardless of whether an error was thrown.
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This typically means printing a message before calling the real function
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and then if the function returns a result printing a message after it
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returns. */
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#include "defs.h"
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#include "gdbcmd.h"
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#include "objfiles.h"
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#include "observer.h"
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#include "source.h"
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#include "symtab.h"
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#include "symfile.h"
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/* We need to save a pointer to the real symbol functions.
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Plus, the debug versions are malloc'd because we have to NULL out the
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ones that are NULL in the real copy. */
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struct debug_sym_fns_data
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{
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const struct sym_fns *real_sf;
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struct sym_fns debug_sf;
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};
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/* We need to record a pointer to the real set of functions for each
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objfile. */
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static const struct objfile_data *symfile_debug_objfile_data_key;
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/* If non-zero all calls to the symfile functions are logged. */
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static int debug_symfile = 0;
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/* Return non-zero if symfile debug logging is installed. */
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static int
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symfile_debug_installed (struct objfile *objfile)
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{
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return (objfile->sf != NULL
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&& objfile_data (objfile, symfile_debug_objfile_data_key) != NULL);
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}
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/* Utility return the name to print for SYMTAB. */
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static const char *
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debug_symtab_name (struct symtab *symtab)
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{
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return symtab_to_filename_for_display (symtab);
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}
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/* Debugging version of struct quick_symbol_functions. */
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static int
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debug_qf_has_symbols (struct objfile *objfile)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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int retval;
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retval = debug_data->real_sf->qf->has_symbols (objfile);
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fprintf_filtered (gdb_stdlog, "qf->has_symbols (%s) = %d\n",
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objfile_debug_name (objfile), retval);
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return retval;
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}
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static struct symtab *
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debug_qf_find_last_source_symtab (struct objfile *objfile)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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struct symtab *retval;
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fprintf_filtered (gdb_stdlog, "qf->find_last_source_symtab (%s)\n",
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objfile_debug_name (objfile));
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retval = debug_data->real_sf->qf->find_last_source_symtab (objfile);
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fprintf_filtered (gdb_stdlog, "qf->find_last_source_symtab (...) = %s\n",
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retval ? debug_symtab_name (retval) : "NULL");
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return retval;
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}
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static void
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debug_qf_forget_cached_source_info (struct objfile *objfile)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog, "qf->forget_cached_source_info (%s)\n",
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objfile_debug_name (objfile));
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debug_data->real_sf->qf->forget_cached_source_info (objfile);
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}
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static int
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debug_qf_map_symtabs_matching_filename (struct objfile *objfile,
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const char *name,
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const char *real_path,
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int (*callback) (struct symtab *,
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void *),
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void *data)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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int retval;
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fprintf_filtered (gdb_stdlog,
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"qf->map_symtabs_matching_filename (%s, \"%s\", \"%s\", %s, %s)\n",
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objfile_debug_name (objfile), name,
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real_path ? real_path : NULL,
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host_address_to_string (callback),
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host_address_to_string (data));
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retval = debug_data->real_sf->qf->map_symtabs_matching_filename
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(objfile, name, real_path, callback, data);
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fprintf_filtered (gdb_stdlog,
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"qf->map_symtabs_matching_filename (...) = %d\n",
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retval);
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return retval;
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}
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static struct compunit_symtab *
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debug_qf_lookup_symbol (struct objfile *objfile, int kind, const char *name,
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domain_enum domain)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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struct compunit_symtab *retval;
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fprintf_filtered (gdb_stdlog,
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"qf->lookup_symbol (%s, %d, \"%s\", %s)\n",
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objfile_debug_name (objfile), kind, name,
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domain_name (domain));
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retval = debug_data->real_sf->qf->lookup_symbol (objfile, kind, name,
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domain);
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fprintf_filtered (gdb_stdlog, "qf->lookup_symbol (...) = %s\n",
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retval
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? debug_symtab_name (compunit_primary_filetab (retval))
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: "NULL");
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return retval;
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}
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static void
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debug_qf_print_stats (struct objfile *objfile)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog, "qf->print_stats (%s)\n",
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objfile_debug_name (objfile));
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debug_data->real_sf->qf->print_stats (objfile);
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}
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static void
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debug_qf_dump (struct objfile *objfile)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog, "qf->dump (%s)\n",
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objfile_debug_name (objfile));
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debug_data->real_sf->qf->dump (objfile);
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}
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static void
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debug_qf_relocate (struct objfile *objfile,
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const struct section_offsets *new_offsets,
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const struct section_offsets *delta)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog, "qf->relocate (%s, %s, %s)\n",
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objfile_debug_name (objfile),
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host_address_to_string (new_offsets),
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host_address_to_string (delta));
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debug_data->real_sf->qf->relocate (objfile, new_offsets, delta);
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}
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static void
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debug_qf_expand_symtabs_for_function (struct objfile *objfile,
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const char *func_name)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog,
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"qf->expand_symtabs_for_function (%s, \"%s\")\n",
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objfile_debug_name (objfile), func_name);
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debug_data->real_sf->qf->expand_symtabs_for_function (objfile, func_name);
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}
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static void
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debug_qf_expand_all_symtabs (struct objfile *objfile)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog, "qf->expand_all_symtabs (%s)\n",
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objfile_debug_name (objfile));
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debug_data->real_sf->qf->expand_all_symtabs (objfile);
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}
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static void
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debug_qf_expand_symtabs_with_fullname (struct objfile *objfile,
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const char *fullname)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog,
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"qf->expand_symtabs_with_fullname (%s, \"%s\")\n",
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objfile_debug_name (objfile), fullname);
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debug_data->real_sf->qf->expand_symtabs_with_fullname (objfile, fullname);
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}
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static void
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debug_qf_map_matching_symbols (struct objfile *objfile,
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const char *name, domain_enum domain,
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int global,
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int (*callback) (struct block *,
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struct symbol *, void *),
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void *data,
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symbol_compare_ftype *match,
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symbol_compare_ftype *ordered_compare)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog,
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"qf->map_matching_symbols (%s, \"%s\", %s, %d, %s, %s, %s, %s)\n",
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objfile_debug_name (objfile), name,
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domain_name (domain), global,
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host_address_to_string (callback),
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host_address_to_string (data),
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host_address_to_string (match),
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host_address_to_string (ordered_compare));
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debug_data->real_sf->qf->map_matching_symbols (objfile, name,
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domain, global,
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callback, data,
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match,
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ordered_compare);
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}
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static void
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debug_qf_expand_symtabs_matching
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(struct objfile *objfile,
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expand_symtabs_file_matcher_ftype *file_matcher,
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expand_symtabs_symbol_matcher_ftype *symbol_matcher,
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expand_symtabs_exp_notify_ftype *expansion_notify,
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enum search_domain kind, void *data)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog,
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"qf->expand_symtabs_matching (%s, %s, %s, %s, %s, %s)\n",
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objfile_debug_name (objfile),
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host_address_to_string (file_matcher),
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host_address_to_string (symbol_matcher),
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host_address_to_string (expansion_notify),
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search_domain_name (kind),
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host_address_to_string (data));
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debug_data->real_sf->qf->expand_symtabs_matching (objfile,
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file_matcher,
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symbol_matcher,
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expansion_notify,
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kind, data);
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}
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static struct compunit_symtab *
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debug_qf_find_pc_sect_compunit_symtab (struct objfile *objfile,
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struct bound_minimal_symbol msymbol,
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CORE_ADDR pc,
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struct obj_section *section,
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int warn_if_readin)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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struct compunit_symtab *retval;
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fprintf_filtered (gdb_stdlog,
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"qf->find_pc_sect_compunit_symtab (%s, %s, %s, %s, %d)\n",
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objfile_debug_name (objfile),
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host_address_to_string (msymbol.minsym),
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hex_string (pc),
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host_address_to_string (section),
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warn_if_readin);
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retval
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= debug_data->real_sf->qf->find_pc_sect_compunit_symtab (objfile, msymbol,
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pc, section,
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warn_if_readin);
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fprintf_filtered (gdb_stdlog,
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"qf->find_pc_sect_compunit_symtab (...) = %s\n",
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retval
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? debug_symtab_name (compunit_primary_filetab (retval))
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: "NULL");
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return retval;
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}
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static void
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debug_qf_map_symbol_filenames (struct objfile *objfile,
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symbol_filename_ftype *fun, void *data,
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int need_fullname)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog,
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"qf->map_symbol_filenames (%s, %s, %s, %d)\n",
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objfile_debug_name (objfile),
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host_address_to_string (fun),
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host_address_to_string (data),
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need_fullname);
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debug_data->real_sf->qf->map_symbol_filenames (objfile, fun, data,
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need_fullname);
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}
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static const struct quick_symbol_functions debug_sym_quick_functions =
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{
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debug_qf_has_symbols,
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debug_qf_find_last_source_symtab,
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debug_qf_forget_cached_source_info,
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debug_qf_map_symtabs_matching_filename,
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debug_qf_lookup_symbol,
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debug_qf_print_stats,
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debug_qf_dump,
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debug_qf_relocate,
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debug_qf_expand_symtabs_for_function,
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debug_qf_expand_all_symtabs,
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debug_qf_expand_symtabs_with_fullname,
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debug_qf_map_matching_symbols,
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debug_qf_expand_symtabs_matching,
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debug_qf_find_pc_sect_compunit_symtab,
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debug_qf_map_symbol_filenames
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};
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/* Debugging version of struct sym_probe_fns. */
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static VEC (probe_p) *
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debug_sym_get_probes (struct objfile *objfile)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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VEC (probe_p) *retval;
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retval = debug_data->real_sf->sym_probe_fns->sym_get_probes (objfile);
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fprintf_filtered (gdb_stdlog,
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"probes->sym_get_probes (%s) = %s\n",
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objfile_debug_name (objfile),
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host_address_to_string (retval));
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return retval;
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}
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static const struct sym_probe_fns debug_sym_probe_fns =
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{
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debug_sym_get_probes,
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};
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/* Debugging version of struct sym_fns. */
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static void
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debug_sym_new_init (struct objfile *objfile)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog, "sf->sym_new_init (%s)\n",
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objfile_debug_name (objfile));
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debug_data->real_sf->sym_new_init (objfile);
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}
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static void
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debug_sym_init (struct objfile *objfile)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog, "sf->sym_init (%s)\n",
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objfile_debug_name (objfile));
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debug_data->real_sf->sym_init (objfile);
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}
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static void
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debug_sym_read (struct objfile *objfile, int symfile_flags)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog, "sf->sym_read (%s, 0x%x)\n",
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objfile_debug_name (objfile), symfile_flags);
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debug_data->real_sf->sym_read (objfile, symfile_flags);
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}
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static void
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debug_sym_read_psymbols (struct objfile *objfile)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog, "sf->sym_read_psymbols (%s)\n",
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objfile_debug_name (objfile));
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debug_data->real_sf->sym_read_psymbols (objfile);
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}
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static void
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debug_sym_finish (struct objfile *objfile)
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{
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const struct debug_sym_fns_data *debug_data
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= ((const struct debug_sym_fns_data *)
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objfile_data (objfile, symfile_debug_objfile_data_key));
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fprintf_filtered (gdb_stdlog, "sf->sym_finish (%s)\n",
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objfile_debug_name (objfile));
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debug_data->real_sf->sym_finish (objfile);
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}
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static void
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debug_sym_offsets (struct objfile *objfile,
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const struct section_addr_info *info)
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{
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const struct debug_sym_fns_data *debug_data
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||
= ((const struct debug_sym_fns_data *)
|
||
objfile_data (objfile, symfile_debug_objfile_data_key));
|
||
|
||
fprintf_filtered (gdb_stdlog, "sf->sym_offsets (%s, %s)\n",
|
||
objfile_debug_name (objfile),
|
||
host_address_to_string (info));
|
||
|
||
debug_data->real_sf->sym_offsets (objfile, info);
|
||
}
|
||
|
||
static struct symfile_segment_data *
|
||
debug_sym_segments (bfd *abfd)
|
||
{
|
||
/* This API function is annoying, it doesn't take a "this" pointer.
|
||
Fortunately it is only used in one place where we (re-)lookup the
|
||
sym_fns table to use. Thus we will never be called. */
|
||
gdb_assert_not_reached ("debug_sym_segments called");
|
||
}
|
||
|
||
static void
|
||
debug_sym_read_linetable (struct objfile *objfile)
|
||
{
|
||
const struct debug_sym_fns_data *debug_data
|
||
= ((const struct debug_sym_fns_data *)
|
||
objfile_data (objfile, symfile_debug_objfile_data_key));
|
||
|
||
fprintf_filtered (gdb_stdlog, "sf->sym_read_linetable (%s)\n",
|
||
objfile_debug_name (objfile));
|
||
|
||
debug_data->real_sf->sym_read_linetable (objfile);
|
||
}
|
||
|
||
static bfd_byte *
|
||
debug_sym_relocate (struct objfile *objfile, asection *sectp, bfd_byte *buf)
|
||
{
|
||
const struct debug_sym_fns_data *debug_data
|
||
= ((const struct debug_sym_fns_data *)
|
||
objfile_data (objfile, symfile_debug_objfile_data_key));
|
||
bfd_byte *retval;
|
||
|
||
retval = debug_data->real_sf->sym_relocate (objfile, sectp, buf);
|
||
|
||
fprintf_filtered (gdb_stdlog,
|
||
"sf->sym_relocate (%s, %s, %s) = %s\n",
|
||
objfile_debug_name (objfile),
|
||
host_address_to_string (sectp),
|
||
host_address_to_string (buf),
|
||
host_address_to_string (retval));
|
||
|
||
return retval;
|
||
}
|
||
|
||
/* Template of debugging version of struct sym_fns.
|
||
A copy is made, with sym_flavour updated, and a pointer to the real table
|
||
installed in real_sf, and then a pointer to the copy is installed in the
|
||
objfile. */
|
||
|
||
static const struct sym_fns debug_sym_fns =
|
||
{
|
||
debug_sym_new_init,
|
||
debug_sym_init,
|
||
debug_sym_read,
|
||
debug_sym_read_psymbols,
|
||
debug_sym_finish,
|
||
debug_sym_offsets,
|
||
debug_sym_segments,
|
||
debug_sym_read_linetable,
|
||
debug_sym_relocate,
|
||
&debug_sym_probe_fns,
|
||
&debug_sym_quick_functions
|
||
};
|
||
|
||
/* Free the copy of sym_fns recorded in the registry. */
|
||
|
||
static void
|
||
symfile_debug_free_objfile (struct objfile *objfile, void *datum)
|
||
{
|
||
xfree (datum);
|
||
}
|
||
|
||
/* Install the debugging versions of the symfile functions for OBJFILE.
|
||
Do not call this if the debug versions are already installed. */
|
||
|
||
static void
|
||
install_symfile_debug_logging (struct objfile *objfile)
|
||
{
|
||
const struct sym_fns *real_sf;
|
||
struct debug_sym_fns_data *debug_data;
|
||
|
||
/* The debug versions should not already be installed. */
|
||
gdb_assert (!symfile_debug_installed (objfile));
|
||
|
||
real_sf = objfile->sf;
|
||
|
||
/* Alas we have to preserve NULL entries in REAL_SF. */
|
||
debug_data = XCNEW (struct debug_sym_fns_data);
|
||
|
||
#define COPY_SF_PTR(from, to, name, func) \
|
||
do { \
|
||
if ((from)->name) \
|
||
(to)->debug_sf.name = func; \
|
||
} while (0)
|
||
|
||
COPY_SF_PTR (real_sf, debug_data, sym_new_init, debug_sym_new_init);
|
||
COPY_SF_PTR (real_sf, debug_data, sym_init, debug_sym_init);
|
||
COPY_SF_PTR (real_sf, debug_data, sym_read, debug_sym_read);
|
||
COPY_SF_PTR (real_sf, debug_data, sym_read_psymbols,
|
||
debug_sym_read_psymbols);
|
||
COPY_SF_PTR (real_sf, debug_data, sym_finish, debug_sym_finish);
|
||
COPY_SF_PTR (real_sf, debug_data, sym_offsets, debug_sym_offsets);
|
||
COPY_SF_PTR (real_sf, debug_data, sym_segments, debug_sym_segments);
|
||
COPY_SF_PTR (real_sf, debug_data, sym_read_linetable,
|
||
debug_sym_read_linetable);
|
||
COPY_SF_PTR (real_sf, debug_data, sym_relocate, debug_sym_relocate);
|
||
if (real_sf->sym_probe_fns)
|
||
debug_data->debug_sf.sym_probe_fns = &debug_sym_probe_fns;
|
||
debug_data->debug_sf.qf = &debug_sym_quick_functions;
|
||
|
||
#undef COPY_SF_PTR
|
||
|
||
debug_data->real_sf = real_sf;
|
||
set_objfile_data (objfile, symfile_debug_objfile_data_key, debug_data);
|
||
objfile->sf = &debug_data->debug_sf;
|
||
}
|
||
|
||
/* Uninstall the debugging versions of the symfile functions for OBJFILE.
|
||
Do not call this if the debug versions are not installed. */
|
||
|
||
static void
|
||
uninstall_symfile_debug_logging (struct objfile *objfile)
|
||
{
|
||
struct debug_sym_fns_data *debug_data;
|
||
|
||
/* The debug versions should be currently installed. */
|
||
gdb_assert (symfile_debug_installed (objfile));
|
||
|
||
debug_data = ((struct debug_sym_fns_data *)
|
||
objfile_data (objfile, symfile_debug_objfile_data_key));
|
||
|
||
objfile->sf = debug_data->real_sf;
|
||
xfree (debug_data);
|
||
set_objfile_data (objfile, symfile_debug_objfile_data_key, NULL);
|
||
}
|
||
|
||
/* Call this function to set OBJFILE->SF.
|
||
Do not set OBJFILE->SF directly. */
|
||
|
||
void
|
||
objfile_set_sym_fns (struct objfile *objfile, const struct sym_fns *sf)
|
||
{
|
||
if (symfile_debug_installed (objfile))
|
||
{
|
||
gdb_assert (debug_symfile);
|
||
/* Remove the current one, and reinstall a new one later. */
|
||
uninstall_symfile_debug_logging (objfile);
|
||
}
|
||
|
||
/* Assume debug logging is disabled. */
|
||
objfile->sf = sf;
|
||
|
||
/* Turn debug logging on if enabled. */
|
||
if (debug_symfile)
|
||
install_symfile_debug_logging (objfile);
|
||
}
|
||
|
||
static void
|
||
set_debug_symfile (char *args, int from_tty, struct cmd_list_element *c)
|
||
{
|
||
struct program_space *pspace;
|
||
struct objfile *objfile;
|
||
|
||
ALL_PSPACES (pspace)
|
||
ALL_PSPACE_OBJFILES (pspace, objfile)
|
||
{
|
||
if (debug_symfile)
|
||
{
|
||
if (!symfile_debug_installed (objfile))
|
||
install_symfile_debug_logging (objfile);
|
||
}
|
||
else
|
||
{
|
||
if (symfile_debug_installed (objfile))
|
||
uninstall_symfile_debug_logging (objfile);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
show_debug_symfile (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Symfile debugging is %s.\n"), value);
|
||
}
|
||
|
||
initialize_file_ftype _initialize_symfile_debug;
|
||
|
||
void
|
||
_initialize_symfile_debug (void)
|
||
{
|
||
symfile_debug_objfile_data_key
|
||
= register_objfile_data_with_cleanup (NULL, symfile_debug_free_objfile);
|
||
|
||
add_setshow_boolean_cmd ("symfile", no_class, &debug_symfile, _("\
|
||
Set debugging of the symfile functions."), _("\
|
||
Show debugging of the symfile functions."), _("\
|
||
When enabled, all calls to the symfile functions are logged."),
|
||
set_debug_symfile, show_debug_symfile,
|
||
&setdebuglist, &showdebuglist);
|
||
|
||
/* Note: We don't need a new-objfile observer because debug logging
|
||
will be installed when objfile init'n calls objfile_set_sym_fns. */
|
||
}
|