mirror of
https://github.com/espressif/binutils-gdb.git
synced 2025-08-06 06:45:56 +08:00
* Makefile.in (SFILES): Add break-catch-throw.c
(COMMON_OBS): Add break-catch-throw.o. * break-catch-throw.c: New file. * breakpoint.c: Move exception-catching code to new file. (ep_parse_optional_if_clause): No longer static. * breakpoint.h (ep_parse_optional_if_clause): Declare.
This commit is contained in:
Tom Tromey
308
gdb/break-catch-throw.c
Normal file
308
gdb/break-catch-throw.c
Normal file
@ -0,0 +1,308 @@
|
||||
/* Everything about catch/throw catchpoints, for GDB.
|
||||
|
||||
Copyright (C) 1986-2013 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 "arch-utils.h"
|
||||
#include <ctype.h>
|
||||
#include "breakpoint.h"
|
||||
#include "gdbcmd.h"
|
||||
#include "inferior.h"
|
||||
#include "annotate.h"
|
||||
#include "valprint.h"
|
||||
#include "cli/cli-utils.h"
|
||||
#include "completer.h"
|
||||
#include "gdb_obstack.h"
|
||||
#include "mi/mi-common.h"
|
||||
|
||||
/* Enums for exception-handling support. */
|
||||
enum exception_event_kind
|
||||
{
|
||||
EX_EVENT_THROW,
|
||||
EX_EVENT_RETHROW,
|
||||
EX_EVENT_CATCH
|
||||
};
|
||||
|
||||
/* A helper function that returns a value indicating the kind of the
|
||||
exception catchpoint B. */
|
||||
|
||||
static enum exception_event_kind
|
||||
classify_exception_breakpoint (struct breakpoint *b)
|
||||
{
|
||||
if (strstr (b->addr_string, "catch") != NULL)
|
||||
return EX_EVENT_CATCH;
|
||||
else if (strstr (b->addr_string, "rethrow") != NULL)
|
||||
return EX_EVENT_RETHROW;
|
||||
else
|
||||
return EX_EVENT_THROW;
|
||||
}
|
||||
|
||||
static enum print_stop_action
|
||||
print_it_exception_catchpoint (bpstat bs)
|
||||
{
|
||||
struct ui_out *uiout = current_uiout;
|
||||
struct breakpoint *b = bs->breakpoint_at;
|
||||
int bp_temp;
|
||||
enum exception_event_kind kind = classify_exception_breakpoint (b);
|
||||
|
||||
annotate_catchpoint (b->number);
|
||||
|
||||
bp_temp = b->disposition == disp_del;
|
||||
ui_out_text (uiout,
|
||||
bp_temp ? "Temporary catchpoint "
|
||||
: "Catchpoint ");
|
||||
if (!ui_out_is_mi_like_p (uiout))
|
||||
ui_out_field_int (uiout, "bkptno", b->number);
|
||||
ui_out_text (uiout,
|
||||
(kind == EX_EVENT_THROW ? " (exception thrown), "
|
||||
: (kind == EX_EVENT_CATCH ? " (exception caught), "
|
||||
: " (exception rethrown), ")));
|
||||
if (ui_out_is_mi_like_p (uiout))
|
||||
{
|
||||
ui_out_field_string (uiout, "reason",
|
||||
async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT));
|
||||
ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition));
|
||||
ui_out_field_int (uiout, "bkptno", b->number);
|
||||
}
|
||||
return PRINT_SRC_AND_LOC;
|
||||
}
|
||||
|
||||
static void
|
||||
print_one_exception_catchpoint (struct breakpoint *b,
|
||||
struct bp_location **last_loc)
|
||||
{
|
||||
struct value_print_options opts;
|
||||
struct ui_out *uiout = current_uiout;
|
||||
enum exception_event_kind kind = classify_exception_breakpoint (b);
|
||||
|
||||
get_user_print_options (&opts);
|
||||
if (opts.addressprint)
|
||||
{
|
||||
annotate_field (4);
|
||||
if (b->loc == NULL || b->loc->shlib_disabled)
|
||||
ui_out_field_string (uiout, "addr", "<PENDING>");
|
||||
else
|
||||
ui_out_field_core_addr (uiout, "addr",
|
||||
b->loc->gdbarch, b->loc->address);
|
||||
}
|
||||
annotate_field (5);
|
||||
if (b->loc)
|
||||
*last_loc = b->loc;
|
||||
|
||||
switch (kind)
|
||||
{
|
||||
case EX_EVENT_THROW:
|
||||
ui_out_field_string (uiout, "what", "exception throw");
|
||||
if (ui_out_is_mi_like_p (uiout))
|
||||
ui_out_field_string (uiout, "catch-type", "throw");
|
||||
break;
|
||||
|
||||
case EX_EVENT_RETHROW:
|
||||
ui_out_field_string (uiout, "what", "exception rethrow");
|
||||
if (ui_out_is_mi_like_p (uiout))
|
||||
ui_out_field_string (uiout, "catch-type", "rethrow");
|
||||
break;
|
||||
|
||||
case EX_EVENT_CATCH:
|
||||
ui_out_field_string (uiout, "what", "exception catch");
|
||||
if (ui_out_is_mi_like_p (uiout))
|
||||
ui_out_field_string (uiout, "catch-type", "catch");
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
print_mention_exception_catchpoint (struct breakpoint *b)
|
||||
{
|
||||
struct ui_out *uiout = current_uiout;
|
||||
int bp_temp;
|
||||
enum exception_event_kind kind = classify_exception_breakpoint (b);
|
||||
|
||||
bp_temp = b->disposition == disp_del;
|
||||
ui_out_text (uiout, bp_temp ? _("Temporary catchpoint ")
|
||||
: _("Catchpoint "));
|
||||
ui_out_field_int (uiout, "bkptno", b->number);
|
||||
ui_out_text (uiout, (kind == EX_EVENT_THROW ? _(" (throw)")
|
||||
: (kind == EX_EVENT_CATCH ? _(" (catch)")
|
||||
: _(" (rethrow)"))));
|
||||
}
|
||||
|
||||
/* Implement the "print_recreate" breakpoint_ops method for throw and
|
||||
catch catchpoints. */
|
||||
|
||||
static void
|
||||
print_recreate_exception_catchpoint (struct breakpoint *b,
|
||||
struct ui_file *fp)
|
||||
{
|
||||
int bp_temp;
|
||||
enum exception_event_kind kind = classify_exception_breakpoint (b);
|
||||
|
||||
bp_temp = b->disposition == disp_del;
|
||||
fprintf_unfiltered (fp, bp_temp ? "tcatch " : "catch ");
|
||||
switch (kind)
|
||||
{
|
||||
case EX_EVENT_THROW:
|
||||
fprintf_unfiltered (fp, "throw");
|
||||
break;
|
||||
case EX_EVENT_CATCH:
|
||||
fprintf_unfiltered (fp, "catch");
|
||||
break;
|
||||
case EX_EVENT_RETHROW:
|
||||
fprintf_unfiltered (fp, "rethrow");
|
||||
break;
|
||||
}
|
||||
print_recreate_thread (b, fp);
|
||||
}
|
||||
|
||||
static struct breakpoint_ops gnu_v3_exception_catchpoint_ops;
|
||||
|
||||
static int
|
||||
handle_gnu_v3_exceptions (int tempflag, char *cond_string,
|
||||
enum exception_event_kind ex_event, int from_tty)
|
||||
{
|
||||
char *trigger_func_name;
|
||||
|
||||
if (ex_event == EX_EVENT_CATCH)
|
||||
trigger_func_name = "__cxa_begin_catch";
|
||||
else if (ex_event == EX_EVENT_RETHROW)
|
||||
trigger_func_name = "__cxa_rethrow";
|
||||
else
|
||||
{
|
||||
gdb_assert (ex_event == EX_EVENT_THROW);
|
||||
trigger_func_name = "__cxa_throw";
|
||||
}
|
||||
|
||||
create_breakpoint (get_current_arch (),
|
||||
trigger_func_name, cond_string, -1, NULL,
|
||||
0 /* condition and thread are valid. */,
|
||||
tempflag, bp_breakpoint,
|
||||
0,
|
||||
AUTO_BOOLEAN_TRUE /* pending */,
|
||||
&gnu_v3_exception_catchpoint_ops, from_tty,
|
||||
1 /* enabled */,
|
||||
0 /* internal */,
|
||||
0);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Deal with "catch catch", "catch throw", and "catch rethrow"
|
||||
commands. */
|
||||
|
||||
static void
|
||||
catch_exception_command_1 (enum exception_event_kind ex_event, char *arg,
|
||||
int tempflag, int from_tty)
|
||||
{
|
||||
char *cond_string = NULL;
|
||||
|
||||
if (!arg)
|
||||
arg = "";
|
||||
arg = skip_spaces (arg);
|
||||
|
||||
cond_string = ep_parse_optional_if_clause (&arg);
|
||||
|
||||
if ((*arg != '\0') && !isspace (*arg))
|
||||
error (_("Junk at end of arguments."));
|
||||
|
||||
if (ex_event != EX_EVENT_THROW
|
||||
&& ex_event != EX_EVENT_CATCH
|
||||
&& ex_event != EX_EVENT_RETHROW)
|
||||
error (_("Unsupported or unknown exception event; cannot catch it"));
|
||||
|
||||
if (handle_gnu_v3_exceptions (tempflag, cond_string, ex_event, from_tty))
|
||||
return;
|
||||
|
||||
warning (_("Unsupported with this platform/compiler combination."));
|
||||
}
|
||||
|
||||
/* Implementation of "catch catch" command. */
|
||||
|
||||
static void
|
||||
catch_catch_command (char *arg, int from_tty, struct cmd_list_element *command)
|
||||
{
|
||||
int tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
|
||||
|
||||
catch_exception_command_1 (EX_EVENT_CATCH, arg, tempflag, from_tty);
|
||||
}
|
||||
|
||||
/* Implementation of "catch throw" command. */
|
||||
|
||||
static void
|
||||
catch_throw_command (char *arg, int from_tty, struct cmd_list_element *command)
|
||||
{
|
||||
int tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
|
||||
|
||||
catch_exception_command_1 (EX_EVENT_THROW, arg, tempflag, from_tty);
|
||||
}
|
||||
|
||||
/* Implementation of "catch rethrow" command. */
|
||||
|
||||
static void
|
||||
catch_rethrow_command (char *arg, int from_tty,
|
||||
struct cmd_list_element *command)
|
||||
{
|
||||
int tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
|
||||
|
||||
catch_exception_command_1 (EX_EVENT_RETHROW, arg, tempflag, from_tty);
|
||||
}
|
||||
|
||||
|
||||
|
||||
static void
|
||||
initialize_throw_catchpoint_ops (void)
|
||||
{
|
||||
struct breakpoint_ops *ops;
|
||||
|
||||
initialize_breakpoint_ops ();
|
||||
|
||||
/* GNU v3 exception catchpoints. */
|
||||
ops = &gnu_v3_exception_catchpoint_ops;
|
||||
*ops = bkpt_breakpoint_ops;
|
||||
ops->print_it = print_it_exception_catchpoint;
|
||||
ops->print_one = print_one_exception_catchpoint;
|
||||
ops->print_mention = print_mention_exception_catchpoint;
|
||||
ops->print_recreate = print_recreate_exception_catchpoint;
|
||||
}
|
||||
|
||||
initialize_file_ftype _initialize_break_catch_throw;
|
||||
|
||||
void
|
||||
_initialize_break_catch_throw (void)
|
||||
{
|
||||
initialize_throw_catchpoint_ops ();
|
||||
|
||||
/* Add catch and tcatch sub-commands. */
|
||||
add_catch_command ("catch", _("\
|
||||
Catch an exception, when caught."),
|
||||
catch_catch_command,
|
||||
NULL,
|
||||
CATCH_PERMANENT,
|
||||
CATCH_TEMPORARY);
|
||||
add_catch_command ("throw", _("\
|
||||
Catch an exception, when thrown."),
|
||||
catch_throw_command,
|
||||
NULL,
|
||||
CATCH_PERMANENT,
|
||||
CATCH_TEMPORARY);
|
||||
add_catch_command ("rethrow", _("\
|
||||
Catch an exception, when rethrown."),
|
||||
catch_rethrow_command,
|
||||
NULL,
|
||||
CATCH_PERMANENT,
|
||||
CATCH_TEMPORARY);
|
||||
}
|
||||
Reference in New Issue
Block a user