mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
6f937416b9
This is sort of a continuation of Keith's parse_exp_1 constification patch. It started out by undoing these bits: @@ -754,9 +754,12 @@ validate_actionline (char **line, struct tmp_p = p; for (loc = t->base.loc; loc; loc = loc->next) { - p = tmp_p; - exp = parse_exp_1 (&p, loc->address, + const char *q; + + q = tmp_p; + exp = parse_exp_1 (&q, loc->address, block_for_pc (loc->address), 1); + p = (char *) q; and progressively making more things const upwards, fixing fallout, rinse repeat, until GDB built again (--enable-targets=all). That ended up constifying lookup_cmd/add_cmd and (lots of) friends, and the completers. I didn't try to constify the command hooks themselves, because I know upfront there are commands that write to the command string argument, and I think I managed to stop at a nice non-hacky split point already. I think the only non-really-super-obvious changes are tracepoint.c:validate_actionline, and tracepoint.c:trace_dump_actions. The rest is just mostly about 'char *' => 'const char *', 'char **'=> 'const char **', and the occasional (e.g., deprecated_cmd_warning) case of 'char **'=> 'const char *', where/when I noticed that nothing actually cares about the pointer to pointer output. Tested on x86_64 Fedora 17, native and gdbserver. gdb/ 2013-03-13 Pedro Alves <palves@redhat.com> * ada-lang.c (struct add_partial_datum) <text, text0, word>: Make fields const. (ada_make_symbol_completion_list): Make "text0" parameter const. * ax-gdb.c (agent_eval_command_one): Make "exp" parameter const. * breakpoint.c (condition_completer): Make "text" and "word" parameters const. Adjust. (check_tracepoint_command): Adjust to validate_actionline prototype change. (catch_syscall_completer): Make "text" and "word" parameters const. * cli/cli-cmds.c (show_user): Make "comname" local const. (valid_command_p): Make "command" parameter const. (alias_command): Make "alias_prefix" and "command_prefix" locals const. * cli/cli-decode.c (add_cmd): Make "name" parameter const. (add_alias_cmd): Make "name" and "oldname" parameters const. Adjust. No longer make copy of OLDNAME. (add_prefix_cmd, add_abbrev_prefix_cmd, add_set_or_show_cmd) (add_setshow_cmd_full, add_setshow_enum_cmd) (add_setshow_auto_boolean_cmd, add_setshow_boolean_cmd) (add_setshow_filename_cmd, add_setshow_string_cmd) (add_setshow_string_noescape_cmd) (add_setshow_optional_filename_cmd, add_setshow_integer_cmd) (add_setshow_uinteger_cmd, add_setshow_zinteger_cmd) (add_setshow_zuinteger_unlimited_cmd, add_setshow_zuinteger_cmd) (delete_cmd, add_info, add_info_alias, add_com, add_com_alias): Make "name" parameter const. (help_cmd): Rename "command" parameter to "arg". New const local "command". (find_cmd): Make "command" parameter const. (lookup_cmd_1): Make "text" parameter pointer to const. Adjust to deprecated_cmd_warning prototype change. (undef_cmd_error): Make "cmdtype" parameter const. (lookup_cmd): Make "line" parameter const. (deprecated_cmd_warning): Change type of "text" parameter to pointer to const char, from pointer to pointer to char. Adjust. (lookup_cmd_composition): Make "text" parameter const. (complete_on_cmdlist, complete_on_enum): Make "text" and "word" parameters const. * cli/cli-decode.h (struct cmd_list_element) <name>: Make field const. * cli/cli-script.c (validate_comname): Make "tem" local const. (define_command): New const local "tem_c". Use it in calls to lookup_cmd. (document_command): Make "tem" and "comfull" locals const. (show_user_1): Make "prefix" and "name" parameters const. * cli-script.h (show_user_1): Make "prefix" and "name" parameters const. * command.h (add_cmd, add_alias_cmd, add_prefix_cmd) (add_abbrev_prefix_cmd, completer_ftype, lookup_cmd, lookup_cmd_1) (deprecated_cmd_warning, lookup_cmd_composition, add_com) (add_com_alias, add_info, add_info_alias, complete_on_cmdlist) (complete_on_enum, add_setshow_enum_cmd) (add_setshow_auto_boolean_cmd, add_setshow_boolean_cmd) (add_setshow_filename_cmd, add_setshow_string_cmd) (add_setshow_string_noescape_cmd) (add_setshow_optional_filename_cmd, add_setshow_integer_cmd) (add_setshow_uinteger_cmd, add_setshow_zinteger_cmd) (add_setshow_zuinteger_cmd, add_setshow_zuinteger_unlimited_cmd): Change prototypes, constifying strings. * completer.c (noop_completer, filename_completer): Make "text" and "prefix" parameters const. (location_completer, expression_completer) (complete_line_internal): Make "text" and "prefix" parameters const and adjust. (command_completer, signal_completer): Make "text" and "prefix" parameters const. * completer.h (noop_completer, filename_completer) (expression_completer, location_completer, command_completer) (signal_completer): Change prototypes. * corefile.c (complete_set_gnutarget): Make "text" and "word" parameters const. * cp-abi.c (cp_abi_completer): Likewise. * expression.h (parse_expression_for_completion): Change prototype. * f-lang.c (f_make_symbol_completion_list): Make "text" and "word" parameters const. * infcmd.c (_initialize_infcmd): Make "cmd_name" local const. * infrun.c (handle_completer): Make "text" and "word" parameters const. * interps.c (interpreter_completer): Make "text" and "word" parameters const. * language.h (struct language_defn) <la_make_symbol_completion_list>: Make "text" and "word" parameters const. * parse.c (parse_exp_1): Move const hack to parse_exp_in_context. (parse_exp_in_context): Rename to ... (parse_exp_in_context_1): ... this. (parse_exp_in_context): Reimplement, with const hack from parse_exp_1. (parse_expression_for_completion): Make "string" parameter const. * printcmd.c (decode_format): Make "string_ptr" parameter pointer to pointer to const char. Adjust. (print_command_1): Make "exp" parameter const. (output_command): Rename to ... (output_command_const): ... this. Make "exp" parameter const. (output_command): Reimplement. (x_command): Adjust. (display_command): Rename "exp" parameter to "arg". New "exp" local, const version of "arg". * python/py-auto-load.c (gdbpy_initialize_auto_load): Make "cmd_name" local const. * python/py-cmd.c (cmdpy_destroyer): Cast const away in xfree call. (cmdpy_completer): Make "text" and "word" parameters const. (gdbpy_parse_command_name): Make "prefix_text2" local const. * python/py-param.c (add_setshow_generic): Make "tmp_name" local const. * remote.c (_initialize_remote): Make "cmd_name" local const. * symtab.c (language_search_unquoted_string): Make "text" and "p" parameters const. Adjust. (completion_list_add_fields): Make "sym_text", "text" and "word" parameters const. (struct add_name_data) <sym_text, text, word>: Make fields const. (default_make_symbol_completion_list_break_on): Make "text" and "word" parameters const. Adjust locals. (default_make_symbol_completion_list) (make_symbol_completion_list, make_symbol_completion_type) (make_symbol_completion_list_fn): Make "text" and "word" parameters const. (make_file_symbol_completion_list): Make "text", "word" and "srcfile" parameters const. Adjust locals. (add_filename_to_list): Make "text" and "word" parameters const. (struct add_partial_filename_data) <text, word>: Make fields const. (make_source_files_completion_list): Make "text" and "word" parameters const. * symtab.h (default_make_symbol_completion_list_break_on) (default_make_symbol_completion_list, make_symbol_completion_list) (make_symbol_completion_type enum type_code) (make_symbol_completion_list_fn make_file_symbol_completion_list) (make_source_files_completion_list): Change prototype. * top.c (execute_command): Adjust to pass pointer to pointer to const char to lookup_cmd, and to deprecated_cmd_warning prototype change. (set_verbose): Make "cmdname" local const. * tracepoint.c (decode_agent_options): Make "exp" parameter const, and adjust. (validate_actionline): Make "line" parameter a pointer to const char, and adjust. (encode_actions_1): Make "action_exp" local const, and adjust. (encode_actions): Adjust. (replace_comma): Delete. (trace_dump_actions): Make "action_exp" and "next_comma" locals const, and adjust. Don't frob the action string while splitting it at commas. Instead, make a copy of each split substring in turn. (trace_dump_command): Adjust to validate_actionline prototype change. * tracepoint.h (decode_agent_options, decode_agent_options) (encode_actions, validate_actionline): Change prototypes. * valprint.h (output_command): Delete declaration. (output_command_const): Declare. * value.c (function_destroyer): Cast const away in xfree call.
497 lines
13 KiB
C
497 lines
13 KiB
C
/* Core dump and executable file functions above target vector, for GDB.
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Copyright (C) 1986-2013 Free Software Foundation, Inc.
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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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#include "defs.h"
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#include "gdb_string.h"
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#include <errno.h>
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#include <signal.h>
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#include <fcntl.h>
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#include "inferior.h"
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#include "symtab.h"
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#include "command.h"
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#include "gdbcmd.h"
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#include "bfd.h"
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#include "target.h"
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#include "gdbcore.h"
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#include "dis-asm.h"
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#include "gdb_stat.h"
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#include "completer.h"
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#include "exceptions.h"
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#include "observer.h"
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#include "cli/cli-utils.h"
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/* Local function declarations. */
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extern void _initialize_core (void);
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static void call_extra_exec_file_hooks (char *filename);
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/* You can have any number of hooks for `exec_file_command' command to
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call. If there's only one hook, it is set in exec_file_display
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hook. If there are two or more hooks, they are set in
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exec_file_extra_hooks[], and deprecated_exec_file_display_hook is
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set to a function that calls all of them. This extra complexity is
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needed to preserve compatibility with old code that assumed that
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only one hook could be set, and which called
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deprecated_exec_file_display_hook directly. */
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typedef void (*hook_type) (char *);
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hook_type deprecated_exec_file_display_hook; /* The original hook. */
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static hook_type *exec_file_extra_hooks; /* Array of additional
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hooks. */
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static int exec_file_hook_count = 0; /* Size of array. */
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/* Binary file diddling handle for the core file. */
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bfd *core_bfd = NULL;
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/* corelow.c target. It is never NULL after GDB initialization. */
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struct target_ops *core_target;
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/* Backward compatability with old way of specifying core files. */
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void
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core_file_command (char *filename, int from_tty)
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{
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dont_repeat (); /* Either way, seems bogus. */
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gdb_assert (core_target != NULL);
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if (!filename)
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(core_target->to_detach) (core_target, filename, from_tty);
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else
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(core_target->to_open) (filename, from_tty);
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}
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/* If there are two or more functions that wish to hook into
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exec_file_command, this function will call all of the hook
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functions. */
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static void
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call_extra_exec_file_hooks (char *filename)
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{
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int i;
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for (i = 0; i < exec_file_hook_count; i++)
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(*exec_file_extra_hooks[i]) (filename);
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}
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/* Call this to specify the hook for exec_file_command to call back.
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This is called from the x-window display code. */
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void
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specify_exec_file_hook (void (*hook) (char *))
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{
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hook_type *new_array;
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if (deprecated_exec_file_display_hook != NULL)
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{
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/* There's already a hook installed. Arrange to have both it
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and the subsequent hooks called. */
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if (exec_file_hook_count == 0)
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{
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/* If this is the first extra hook, initialize the hook
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array. */
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exec_file_extra_hooks = (hook_type *)
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xmalloc (sizeof (hook_type));
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exec_file_extra_hooks[0] = deprecated_exec_file_display_hook;
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deprecated_exec_file_display_hook = call_extra_exec_file_hooks;
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exec_file_hook_count = 1;
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}
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/* Grow the hook array by one and add the new hook to the end.
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Yes, it's inefficient to grow it by one each time but since
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this is hardly ever called it's not a big deal. */
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exec_file_hook_count++;
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new_array = (hook_type *)
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xrealloc (exec_file_extra_hooks,
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exec_file_hook_count * sizeof (hook_type));
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exec_file_extra_hooks = new_array;
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exec_file_extra_hooks[exec_file_hook_count - 1] = hook;
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}
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else
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deprecated_exec_file_display_hook = hook;
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}
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void
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reopen_exec_file (void)
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{
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char *filename;
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int res;
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struct stat st;
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struct cleanup *cleanups;
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/* Don't do anything if there isn't an exec file. */
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if (exec_bfd == NULL)
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return;
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/* If the timestamp of the exec file has changed, reopen it. */
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filename = xstrdup (bfd_get_filename (exec_bfd));
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cleanups = make_cleanup (xfree, filename);
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res = stat (filename, &st);
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if (exec_bfd_mtime && exec_bfd_mtime != st.st_mtime)
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exec_file_attach (filename, 0);
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else
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/* If we accessed the file since last opening it, close it now;
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this stops GDB from holding the executable open after it
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exits. */
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bfd_cache_close_all ();
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do_cleanups (cleanups);
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}
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/* If we have both a core file and an exec file,
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print a warning if they don't go together. */
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void
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validate_files (void)
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{
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if (exec_bfd && core_bfd)
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{
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if (!core_file_matches_executable_p (core_bfd, exec_bfd))
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warning (_("core file may not match specified executable file."));
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else if (bfd_get_mtime (exec_bfd) > bfd_get_mtime (core_bfd))
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warning (_("exec file is newer than core file."));
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}
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}
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/* Return the name of the executable file as a string.
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ERR nonzero means get error if there is none specified;
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otherwise return 0 in that case. */
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char *
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get_exec_file (int err)
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{
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if (exec_bfd)
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return bfd_get_filename (exec_bfd);
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if (!err)
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return NULL;
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error (_("No executable file specified.\n\
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Use the \"file\" or \"exec-file\" command."));
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return NULL;
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}
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/* Report a memory error by throwing a MEMORY_ERROR error. */
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void
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memory_error (int status, CORE_ADDR memaddr)
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{
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if (status == EIO)
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/* Actually, address between memaddr and memaddr + len was out of
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bounds. */
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throw_error (MEMORY_ERROR,
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_("Cannot access memory at address %s"),
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paddress (target_gdbarch (), memaddr));
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else
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throw_error (MEMORY_ERROR,
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_("Error accessing memory address %s: %s."),
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paddress (target_gdbarch (), memaddr),
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safe_strerror (status));
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}
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/* Same as target_read_memory, but report an error if can't read. */
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void
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read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
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{
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int status;
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status = target_read_memory (memaddr, myaddr, len);
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if (status != 0)
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memory_error (status, memaddr);
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}
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/* Same as target_read_stack, but report an error if can't read. */
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void
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read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
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{
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int status;
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status = target_read_stack (memaddr, myaddr, len);
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if (status != 0)
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memory_error (status, memaddr);
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}
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/* Argument / return result struct for use with
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do_captured_read_memory_integer(). MEMADDR and LEN are filled in
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by gdb_read_memory_integer(). RESULT is the contents that were
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successfully read from MEMADDR of length LEN. */
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struct captured_read_memory_integer_arguments
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{
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CORE_ADDR memaddr;
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int len;
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enum bfd_endian byte_order;
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LONGEST result;
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};
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/* Helper function for gdb_read_memory_integer(). DATA must be a
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pointer to a captured_read_memory_integer_arguments struct.
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Return 1 if successful. Note that the catch_errors() interface
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will return 0 if an error occurred while reading memory. This
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choice of return code is so that we can distinguish between
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success and failure. */
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static int
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do_captured_read_memory_integer (void *data)
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{
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struct captured_read_memory_integer_arguments *args
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= (struct captured_read_memory_integer_arguments*) data;
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CORE_ADDR memaddr = args->memaddr;
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int len = args->len;
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enum bfd_endian byte_order = args->byte_order;
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args->result = read_memory_integer (memaddr, len, byte_order);
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return 1;
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}
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/* Read memory at MEMADDR of length LEN and put the contents in
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RETURN_VALUE. Return 0 if MEMADDR couldn't be read and non-zero
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if successful. */
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int
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safe_read_memory_integer (CORE_ADDR memaddr, int len,
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enum bfd_endian byte_order,
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LONGEST *return_value)
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{
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int status;
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struct captured_read_memory_integer_arguments args;
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args.memaddr = memaddr;
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args.len = len;
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args.byte_order = byte_order;
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status = catch_errors (do_captured_read_memory_integer, &args,
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"", RETURN_MASK_ALL);
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if (status)
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*return_value = args.result;
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return status;
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}
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LONGEST
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read_memory_integer (CORE_ADDR memaddr, int len,
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enum bfd_endian byte_order)
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{
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gdb_byte buf[sizeof (LONGEST)];
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read_memory (memaddr, buf, len);
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return extract_signed_integer (buf, len, byte_order);
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}
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ULONGEST
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read_memory_unsigned_integer (CORE_ADDR memaddr, int len,
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enum bfd_endian byte_order)
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{
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gdb_byte buf[sizeof (ULONGEST)];
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read_memory (memaddr, buf, len);
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return extract_unsigned_integer (buf, len, byte_order);
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}
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void
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read_memory_string (CORE_ADDR memaddr, char *buffer, int max_len)
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{
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char *cp;
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int i;
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int cnt;
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cp = buffer;
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while (1)
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{
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if (cp - buffer >= max_len)
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{
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buffer[max_len - 1] = '\0';
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break;
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}
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cnt = max_len - (cp - buffer);
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if (cnt > 8)
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cnt = 8;
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read_memory (memaddr + (int) (cp - buffer), (gdb_byte *) cp, cnt);
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for (i = 0; i < cnt && *cp; i++, cp++)
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; /* null body */
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if (i < cnt && !*cp)
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break;
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}
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}
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CORE_ADDR
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read_memory_typed_address (CORE_ADDR addr, struct type *type)
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{
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gdb_byte *buf = alloca (TYPE_LENGTH (type));
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read_memory (addr, buf, TYPE_LENGTH (type));
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return extract_typed_address (buf, type);
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}
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/* Same as target_write_memory, but report an error if can't
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write. */
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void
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write_memory (CORE_ADDR memaddr,
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const bfd_byte *myaddr, ssize_t len)
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{
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int status;
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status = target_write_memory (memaddr, myaddr, len);
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if (status != 0)
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memory_error (status, memaddr);
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}
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/* Same as write_memory, but notify 'memory_changed' observers. */
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void
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write_memory_with_notification (CORE_ADDR memaddr, const bfd_byte *myaddr,
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ssize_t len)
|
||
{
|
||
write_memory (memaddr, myaddr, len);
|
||
observer_notify_memory_changed (current_inferior (), memaddr, len, myaddr);
|
||
}
|
||
|
||
/* Store VALUE at ADDR in the inferior as a LEN-byte unsigned
|
||
integer. */
|
||
void
|
||
write_memory_unsigned_integer (CORE_ADDR addr, int len,
|
||
enum bfd_endian byte_order,
|
||
ULONGEST value)
|
||
{
|
||
gdb_byte *buf = alloca (len);
|
||
|
||
store_unsigned_integer (buf, len, byte_order, value);
|
||
write_memory (addr, buf, len);
|
||
}
|
||
|
||
/* Store VALUE at ADDR in the inferior as a LEN-byte signed
|
||
integer. */
|
||
void
|
||
write_memory_signed_integer (CORE_ADDR addr, int len,
|
||
enum bfd_endian byte_order,
|
||
LONGEST value)
|
||
{
|
||
gdb_byte *buf = alloca (len);
|
||
|
||
store_signed_integer (buf, len, byte_order, value);
|
||
write_memory (addr, buf, len);
|
||
}
|
||
|
||
/* The current default bfd target. Points to storage allocated for
|
||
gnutarget_string. */
|
||
char *gnutarget;
|
||
|
||
/* Same thing, except it is "auto" not NULL for the default case. */
|
||
static char *gnutarget_string;
|
||
static void
|
||
show_gnutarget_string (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c,
|
||
const char *value)
|
||
{
|
||
fprintf_filtered (file,
|
||
_("The current BFD target is \"%s\".\n"), value);
|
||
}
|
||
|
||
static void set_gnutarget_command (char *, int,
|
||
struct cmd_list_element *);
|
||
|
||
static void
|
||
set_gnutarget_command (char *ignore, int from_tty,
|
||
struct cmd_list_element *c)
|
||
{
|
||
char *gend = gnutarget_string + strlen (gnutarget_string);
|
||
|
||
gend = remove_trailing_whitespace (gnutarget_string, gend);
|
||
*gend = '\0';
|
||
|
||
if (strcmp (gnutarget_string, "auto") == 0)
|
||
gnutarget = NULL;
|
||
else
|
||
gnutarget = gnutarget_string;
|
||
}
|
||
|
||
/* A completion function for "set gnutarget". */
|
||
|
||
static VEC (char_ptr) *
|
||
complete_set_gnutarget (struct cmd_list_element *cmd,
|
||
const char *text, const char *word)
|
||
{
|
||
static const char **bfd_targets;
|
||
|
||
if (bfd_targets == NULL)
|
||
{
|
||
int last;
|
||
|
||
bfd_targets = bfd_target_list ();
|
||
for (last = 0; bfd_targets[last] != NULL; ++last)
|
||
;
|
||
|
||
bfd_targets = xrealloc (bfd_targets, (last + 2) * sizeof (const char **));
|
||
bfd_targets[last] = "auto";
|
||
bfd_targets[last + 1] = NULL;
|
||
}
|
||
|
||
return complete_on_enum (bfd_targets, text, word);
|
||
}
|
||
|
||
/* Set the gnutarget. */
|
||
void
|
||
set_gnutarget (char *newtarget)
|
||
{
|
||
if (gnutarget_string != NULL)
|
||
xfree (gnutarget_string);
|
||
gnutarget_string = xstrdup (newtarget);
|
||
set_gnutarget_command (NULL, 0, NULL);
|
||
}
|
||
|
||
void
|
||
_initialize_core (void)
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
c = add_cmd ("core-file", class_files, core_file_command, _("\
|
||
Use FILE as core dump for examining memory and registers.\n\
|
||
No arg means have no core file. This command has been superseded by the\n\
|
||
`target core' and `detach' commands."), &cmdlist);
|
||
set_cmd_completer (c, filename_completer);
|
||
|
||
|
||
c = add_setshow_string_noescape_cmd ("gnutarget", class_files,
|
||
&gnutarget_string, _("\
|
||
Set the current BFD target."), _("\
|
||
Show the current BFD target."), _("\
|
||
Use `set gnutarget auto' to specify automatic detection."),
|
||
set_gnutarget_command,
|
||
show_gnutarget_string,
|
||
&setlist, &showlist);
|
||
set_cmd_completer (c, complete_set_gnutarget);
|
||
|
||
add_alias_cmd ("g", "gnutarget", class_files, 1, &setlist);
|
||
|
||
if (getenv ("GNUTARGET"))
|
||
set_gnutarget (getenv ("GNUTARGET"));
|
||
else
|
||
set_gnutarget ("auto");
|
||
}
|