2013-04-16 02:04:53 +08:00
|
|
|
|
/* 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"
|
2013-04-16 02:05:48 +08:00
|
|
|
|
#include "exceptions.h"
|
|
|
|
|
#include "linespec.h"
|
2013-04-16 02:06:42 +08:00
|
|
|
|
#include "probe.h"
|
2013-04-16 02:04:53 +08:00
|
|
|
|
|
|
|
|
|
/* Enums for exception-handling support. */
|
|
|
|
|
enum exception_event_kind
|
|
|
|
|
{
|
|
|
|
|
EX_EVENT_THROW,
|
|
|
|
|
EX_EVENT_RETHROW,
|
|
|
|
|
EX_EVENT_CATCH
|
|
|
|
|
};
|
|
|
|
|
|
2013-04-16 02:06:42 +08:00
|
|
|
|
/* Each spot where we may place an exception-related catchpoint has
|
|
|
|
|
two names: the SDT probe point and the function name. This
|
|
|
|
|
structure holds both. */
|
|
|
|
|
|
|
|
|
|
struct exception_names
|
|
|
|
|
{
|
|
|
|
|
/* The name of the probe point to try, in the form accepted by
|
|
|
|
|
'parse_probes'. */
|
|
|
|
|
|
|
|
|
|
const char *probe;
|
|
|
|
|
|
|
|
|
|
/* The name of the corresponding function. */
|
|
|
|
|
|
|
|
|
|
const char *function;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Names of the probe points and functions on which to break. This is
|
|
|
|
|
indexed by exception_event_kind. */
|
|
|
|
|
static const struct exception_names exception_functions[] =
|
2013-04-16 02:05:48 +08:00
|
|
|
|
{
|
2013-04-16 02:06:42 +08:00
|
|
|
|
{ "-probe-stap libstdcxx:throw", "__cxa_throw" },
|
|
|
|
|
{ "-probe-stap libstdcxx:rethrow", "__cxa_rethrow" },
|
|
|
|
|
{ "-probe-stap libstdcxx:catch", "__cxa_begin_catch" }
|
2013-04-16 02:05:48 +08:00
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static struct breakpoint_ops gnu_v3_exception_catchpoint_ops;
|
|
|
|
|
|
|
|
|
|
/* The type of an exception catchpoint. */
|
|
|
|
|
|
|
|
|
|
struct exception_catchpoint
|
|
|
|
|
{
|
|
|
|
|
/* The base class. */
|
|
|
|
|
|
|
|
|
|
struct breakpoint base;
|
|
|
|
|
|
|
|
|
|
/* The kind of exception catchpoint. */
|
|
|
|
|
|
|
|
|
|
enum exception_event_kind kind;
|
|
|
|
|
};
|
|
|
|
|
|
2013-04-16 02:04:53 +08:00
|
|
|
|
/* 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)
|
|
|
|
|
{
|
2013-04-16 02:05:48 +08:00
|
|
|
|
struct exception_catchpoint *cp = (struct exception_catchpoint *) b;
|
|
|
|
|
|
|
|
|
|
return cp->kind;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Implement the 're_set' method. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
re_set_exception_catchpoint (struct breakpoint *self)
|
|
|
|
|
{
|
|
|
|
|
struct symtabs_and_lines sals = {0};
|
|
|
|
|
struct symtabs_and_lines sals_end = {0};
|
|
|
|
|
volatile struct gdb_exception e;
|
|
|
|
|
struct cleanup *cleanup;
|
|
|
|
|
enum exception_event_kind kind = classify_exception_breakpoint (self);
|
2013-04-16 02:06:42 +08:00
|
|
|
|
int pass;
|
2013-04-16 02:05:48 +08:00
|
|
|
|
|
2013-04-16 02:06:42 +08:00
|
|
|
|
for (pass = 0; sals.sals == NULL && pass < 2; ++pass)
|
2013-04-16 02:05:48 +08:00
|
|
|
|
{
|
2013-04-16 02:06:42 +08:00
|
|
|
|
TRY_CATCH (e, RETURN_MASK_ERROR)
|
|
|
|
|
{
|
|
|
|
|
char *spec;
|
|
|
|
|
|
|
|
|
|
if (pass == 0)
|
|
|
|
|
{
|
|
|
|
|
spec = ASTRDUP (exception_functions[kind].probe);
|
|
|
|
|
sals = parse_probes (&spec, NULL);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
spec = ASTRDUP (exception_functions[kind].function);
|
|
|
|
|
self->ops->decode_linespec (self, &spec, &sals);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
/* NOT_FOUND_ERROR just means the breakpoint will be pending, so
|
|
|
|
|
let it through. */
|
|
|
|
|
if (e.reason < 0 && e.error != NOT_FOUND_ERROR)
|
|
|
|
|
throw_exception (e);
|
2013-04-16 02:05:48 +08:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
cleanup = make_cleanup (xfree, sals.sals);
|
|
|
|
|
update_breakpoint_locations (self, sals, sals_end);
|
|
|
|
|
do_cleanups (cleanup);
|
2013-04-16 02:04:53 +08:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
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);
|
|
|
|
|
}
|
|
|
|
|
|
2013-04-16 02:05:48 +08:00
|
|
|
|
static void
|
2013-04-16 02:04:53 +08:00
|
|
|
|
handle_gnu_v3_exceptions (int tempflag, char *cond_string,
|
|
|
|
|
enum exception_event_kind ex_event, int from_tty)
|
|
|
|
|
{
|
2013-04-16 02:05:48 +08:00
|
|
|
|
struct exception_catchpoint *cp;
|
2013-04-16 02:04:53 +08:00
|
|
|
|
|
2013-04-16 02:05:48 +08:00
|
|
|
|
cp = XCNEW (struct exception_catchpoint);
|
|
|
|
|
init_catchpoint (&cp->base, get_current_arch (), tempflag, cond_string,
|
|
|
|
|
&gnu_v3_exception_catchpoint_ops);
|
|
|
|
|
/* We need to reset 'type' in order for code in breakpoint.c to do
|
|
|
|
|
the right thing. */
|
|
|
|
|
cp->base.type = bp_breakpoint;
|
|
|
|
|
cp->kind = ex_event;
|
|
|
|
|
|
|
|
|
|
re_set_exception_catchpoint (&cp->base);
|
|
|
|
|
|
|
|
|
|
install_breakpoint (0, &cp->base, 1);
|
2013-04-16 02:04:53 +08:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* 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"));
|
|
|
|
|
|
2013-04-16 02:05:48 +08:00
|
|
|
|
handle_gnu_v3_exceptions (tempflag, cond_string, ex_event, from_tty);
|
2013-04-16 02:04:53 +08:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* 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;
|
2013-04-16 02:05:48 +08:00
|
|
|
|
ops->re_set = re_set_exception_catchpoint;
|
2013-04-16 02:04:53 +08:00
|
|
|
|
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);
|
|
|
|
|
}
|