/* Exception (throw catch) mechanism, for GDB, the GNU debugger.
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/* Exception (throw catch) mechanism, for GDB, the GNU debugger.
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Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
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Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
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1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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Free Software Foundation, Inc.
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Free Software Foundation, Inc.
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This file is part of GDB.
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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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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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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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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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(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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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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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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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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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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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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "defs.h"
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#include "exceptions.h"
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#include "exceptions.h"
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#include "breakpoint.h"
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#include "breakpoint.h"
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#include "target.h"
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#include "target.h"
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#include "inferior.h"
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#include "inferior.h"
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#include "annotate.h"
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#include "annotate.h"
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#include "ui-out.h"
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#include "ui-out.h"
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#include "gdb_assert.h"
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#include "gdb_assert.h"
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#include "gdb_string.h"
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#include "gdb_string.h"
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#include "serial.h"
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#include "serial.h"
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const struct gdb_exception exception_none = { 0, GDB_NO_ERROR, NULL };
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const struct gdb_exception exception_none = { 0, GDB_NO_ERROR, NULL };
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/* Possible catcher states. */
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/* Possible catcher states. */
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enum catcher_state {
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enum catcher_state {
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/* Initial state, a new catcher has just been created. */
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/* Initial state, a new catcher has just been created. */
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CATCHER_CREATED,
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CATCHER_CREATED,
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/* The catch code is running. */
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/* The catch code is running. */
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CATCHER_RUNNING,
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CATCHER_RUNNING,
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CATCHER_RUNNING_1,
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CATCHER_RUNNING_1,
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/* The catch code threw an exception. */
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/* The catch code threw an exception. */
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CATCHER_ABORTING
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CATCHER_ABORTING
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};
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};
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/* Possible catcher actions. */
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/* Possible catcher actions. */
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enum catcher_action {
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enum catcher_action {
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CATCH_ITER,
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CATCH_ITER,
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CATCH_ITER_1,
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CATCH_ITER_1,
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CATCH_THROWING
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CATCH_THROWING
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};
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};
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struct catcher
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struct catcher
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{
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{
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enum catcher_state state;
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enum catcher_state state;
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/* Jump buffer pointing back at the exception handler. */
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/* Jump buffer pointing back at the exception handler. */
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EXCEPTIONS_SIGJMP_BUF buf;
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EXCEPTIONS_SIGJMP_BUF buf;
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/* Status buffer belonging to the exception handler. */
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/* Status buffer belonging to the exception handler. */
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volatile struct gdb_exception *exception;
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volatile struct gdb_exception *exception;
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/* Saved/current state. */
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/* Saved/current state. */
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int mask;
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int mask;
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struct ui_out *saved_uiout;
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struct ui_out *saved_uiout;
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struct cleanup *saved_cleanup_chain;
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struct cleanup *saved_cleanup_chain;
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/* Back link. */
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/* Back link. */
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struct catcher *prev;
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struct catcher *prev;
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};
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};
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/* Where to go for throw_exception(). */
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/* Where to go for throw_exception(). */
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static struct catcher *current_catcher;
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static struct catcher *current_catcher;
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EXCEPTIONS_SIGJMP_BUF *
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EXCEPTIONS_SIGJMP_BUF *
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exceptions_state_mc_init (struct ui_out *func_uiout,
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exceptions_state_mc_init (struct ui_out *func_uiout,
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volatile struct gdb_exception *exception,
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volatile struct gdb_exception *exception,
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return_mask mask)
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return_mask mask)
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{
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{
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struct catcher *new_catcher = XZALLOC (struct catcher);
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struct catcher *new_catcher = XZALLOC (struct catcher);
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/* Start with no exception, save it's address. */
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/* Start with no exception, save it's address. */
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exception->reason = 0;
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exception->reason = 0;
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exception->error = GDB_NO_ERROR;
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exception->error = GDB_NO_ERROR;
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exception->message = NULL;
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exception->message = NULL;
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new_catcher->exception = exception;
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new_catcher->exception = exception;
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new_catcher->mask = mask;
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new_catcher->mask = mask;
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/* Override the global ``struct ui_out'' builder. */
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/* Override the global ``struct ui_out'' builder. */
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new_catcher->saved_uiout = uiout;
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new_catcher->saved_uiout = uiout;
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uiout = func_uiout;
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uiout = func_uiout;
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/* Prevent error/quit during FUNC from calling cleanups established
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/* Prevent error/quit during FUNC from calling cleanups established
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prior to here. */
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prior to here. */
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new_catcher->saved_cleanup_chain = save_cleanups ();
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new_catcher->saved_cleanup_chain = save_cleanups ();
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/* Push this new catcher on the top. */
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/* Push this new catcher on the top. */
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new_catcher->prev = current_catcher;
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new_catcher->prev = current_catcher;
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current_catcher = new_catcher;
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current_catcher = new_catcher;
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new_catcher->state = CATCHER_CREATED;
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new_catcher->state = CATCHER_CREATED;
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return &new_catcher->buf;
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return &new_catcher->buf;
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}
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}
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static void
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static void
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catcher_pop (void)
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catcher_pop (void)
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{
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{
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struct catcher *old_catcher = current_catcher;
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struct catcher *old_catcher = current_catcher;
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current_catcher = old_catcher->prev;
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current_catcher = old_catcher->prev;
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/* Restore the cleanup chain, the error/quit messages, and the uiout
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/* Restore the cleanup chain, the error/quit messages, and the uiout
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builder, to their original states. */
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builder, to their original states. */
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restore_cleanups (old_catcher->saved_cleanup_chain);
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restore_cleanups (old_catcher->saved_cleanup_chain);
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uiout = old_catcher->saved_uiout;
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uiout = old_catcher->saved_uiout;
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xfree (old_catcher);
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xfree (old_catcher);
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}
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}
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/* Catcher state machine. Returns non-zero if the m/c should be run
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/* Catcher state machine. Returns non-zero if the m/c should be run
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again, zero if it should abort. */
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again, zero if it should abort. */
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static int
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static int
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exceptions_state_mc (enum catcher_action action)
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exceptions_state_mc (enum catcher_action action)
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{
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{
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switch (current_catcher->state)
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switch (current_catcher->state)
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{
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{
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case CATCHER_CREATED:
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case CATCHER_CREATED:
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switch (action)
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switch (action)
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{
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{
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case CATCH_ITER:
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case CATCH_ITER:
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/* Allow the code to run the catcher. */
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/* Allow the code to run the catcher. */
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current_catcher->state = CATCHER_RUNNING;
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current_catcher->state = CATCHER_RUNNING;
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return 1;
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return 1;
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default:
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default:
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internal_error (__FILE__, __LINE__, _("bad state"));
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internal_error (__FILE__, __LINE__, _("bad state"));
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}
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}
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case CATCHER_RUNNING:
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case CATCHER_RUNNING:
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switch (action)
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switch (action)
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{
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{
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case CATCH_ITER:
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case CATCH_ITER:
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/* No error/quit has occured. Just clean up. */
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/* No error/quit has occured. Just clean up. */
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catcher_pop ();
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catcher_pop ();
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return 0;
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return 0;
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case CATCH_ITER_1:
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case CATCH_ITER_1:
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current_catcher->state = CATCHER_RUNNING_1;
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current_catcher->state = CATCHER_RUNNING_1;
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return 1;
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return 1;
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case CATCH_THROWING:
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case CATCH_THROWING:
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current_catcher->state = CATCHER_ABORTING;
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current_catcher->state = CATCHER_ABORTING;
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/* See also throw_exception. */
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/* See also throw_exception. */
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return 1;
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return 1;
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default:
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default:
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internal_error (__FILE__, __LINE__, _("bad switch"));
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internal_error (__FILE__, __LINE__, _("bad switch"));
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}
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}
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case CATCHER_RUNNING_1:
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case CATCHER_RUNNING_1:
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switch (action)
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switch (action)
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{
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{
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case CATCH_ITER:
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case CATCH_ITER:
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/* The did a "break" from the inner while loop. */
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/* The did a "break" from the inner while loop. */
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catcher_pop ();
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catcher_pop ();
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return 0;
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return 0;
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case CATCH_ITER_1:
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case CATCH_ITER_1:
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current_catcher->state = CATCHER_RUNNING;
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current_catcher->state = CATCHER_RUNNING;
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return 0;
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return 0;
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case CATCH_THROWING:
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case CATCH_THROWING:
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current_catcher->state = CATCHER_ABORTING;
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current_catcher->state = CATCHER_ABORTING;
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/* See also throw_exception. */
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/* See also throw_exception. */
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return 1;
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return 1;
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default:
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default:
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internal_error (__FILE__, __LINE__, _("bad switch"));
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internal_error (__FILE__, __LINE__, _("bad switch"));
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}
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}
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case CATCHER_ABORTING:
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case CATCHER_ABORTING:
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switch (action)
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switch (action)
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{
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{
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case CATCH_ITER:
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case CATCH_ITER:
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{
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{
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struct gdb_exception exception = *current_catcher->exception;
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struct gdb_exception exception = *current_catcher->exception;
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if (current_catcher->mask & RETURN_MASK (exception.reason))
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if (current_catcher->mask & RETURN_MASK (exception.reason))
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{
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{
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/* Exit normally if this catcher can handle this
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/* Exit normally if this catcher can handle this
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exception. The caller analyses the func return
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exception. The caller analyses the func return
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values. */
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values. */
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catcher_pop ();
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catcher_pop ();
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return 0;
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return 0;
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}
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}
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/* The caller didn't request that the event be caught,
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/* The caller didn't request that the event be caught,
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relay the event to the next containing
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relay the event to the next containing
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catch_errors(). */
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catch_errors(). */
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catcher_pop ();
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catcher_pop ();
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throw_exception (exception);
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throw_exception (exception);
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}
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}
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default:
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default:
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internal_error (__FILE__, __LINE__, _("bad state"));
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internal_error (__FILE__, __LINE__, _("bad state"));
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}
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}
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default:
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default:
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internal_error (__FILE__, __LINE__, _("bad switch"));
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internal_error (__FILE__, __LINE__, _("bad switch"));
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}
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}
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}
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}
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int
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int
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exceptions_state_mc_action_iter (void)
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exceptions_state_mc_action_iter (void)
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{
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{
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return exceptions_state_mc (CATCH_ITER);
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return exceptions_state_mc (CATCH_ITER);
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}
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}
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int
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int
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exceptions_state_mc_action_iter_1 (void)
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exceptions_state_mc_action_iter_1 (void)
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{
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{
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return exceptions_state_mc (CATCH_ITER_1);
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return exceptions_state_mc (CATCH_ITER_1);
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}
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}
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/* Return EXCEPTION to the nearest containing catch_errors(). */
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/* Return EXCEPTION to the nearest containing catch_errors(). */
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NORETURN void
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NORETURN void
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throw_exception (struct gdb_exception exception)
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throw_exception (struct gdb_exception exception)
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{
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{
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quit_flag = 0;
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quit_flag = 0;
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immediate_quit = 0;
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immediate_quit = 0;
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|
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/* Perhaps it would be cleaner to do this via the cleanup chain (not sure
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/* Perhaps it would be cleaner to do this via the cleanup chain (not sure
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I can think of a reason why that is vital, though). */
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I can think of a reason why that is vital, though). */
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bpstat_clear_actions (stop_bpstat); /* Clear queued breakpoint commands */
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bpstat_clear_actions (stop_bpstat); /* Clear queued breakpoint commands */
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disable_current_display ();
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disable_current_display ();
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do_cleanups (ALL_CLEANUPS);
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do_cleanups (ALL_CLEANUPS);
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if (target_can_async_p () && !target_executing)
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if (target_can_async_p () && !target_executing)
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do_exec_cleanups (ALL_CLEANUPS);
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do_exec_cleanups (ALL_CLEANUPS);
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if (sync_execution)
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if (sync_execution)
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do_exec_error_cleanups (ALL_CLEANUPS);
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do_exec_error_cleanups (ALL_CLEANUPS);
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/* Jump to the containing catch_errors() call, communicating REASON
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/* Jump to the containing catch_errors() call, communicating REASON
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to that call via setjmp's return value. Note that REASON can't
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to that call via setjmp's return value. Note that REASON can't
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be zero, by definition in defs.h. */
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be zero, by definition in defs.h. */
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exceptions_state_mc (CATCH_THROWING);
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exceptions_state_mc (CATCH_THROWING);
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*current_catcher->exception = exception;
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*current_catcher->exception = exception;
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EXCEPTIONS_SIGLONGJMP (current_catcher->buf, exception.reason);
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EXCEPTIONS_SIGLONGJMP (current_catcher->buf, exception.reason);
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}
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}
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static char *last_message;
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static char *last_message;
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NORETURN void
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NORETURN void
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deprecated_throw_reason (enum return_reason reason)
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deprecated_throw_reason (enum return_reason reason)
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{
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{
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struct gdb_exception exception;
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struct gdb_exception exception;
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memset (&exception, 0, sizeof exception);
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memset (&exception, 0, sizeof exception);
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|
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exception.reason = reason;
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exception.reason = reason;
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switch (reason)
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switch (reason)
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{
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{
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case RETURN_QUIT:
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case RETURN_QUIT:
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break;
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break;
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case RETURN_ERROR:
|
case RETURN_ERROR:
|
exception.error = GENERIC_ERROR;
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exception.error = GENERIC_ERROR;
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break;
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break;
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default:
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default:
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internal_error (__FILE__, __LINE__, _("bad switch"));
|
internal_error (__FILE__, __LINE__, _("bad switch"));
|
}
|
}
|
|
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throw_exception (exception);
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throw_exception (exception);
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}
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}
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static void
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static void
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print_flush (void)
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print_flush (void)
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{
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{
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struct serial *gdb_stdout_serial;
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struct serial *gdb_stdout_serial;
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|
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if (deprecated_error_begin_hook)
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if (deprecated_error_begin_hook)
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deprecated_error_begin_hook ();
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deprecated_error_begin_hook ();
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target_terminal_ours ();
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target_terminal_ours ();
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|
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/* We want all output to appear now, before we print the error. We
|
/* We want all output to appear now, before we print the error. We
|
have 3 levels of buffering we have to flush (it's possible that
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have 3 levels of buffering we have to flush (it's possible that
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some of these should be changed to flush the lower-level ones
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some of these should be changed to flush the lower-level ones
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too): */
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too): */
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|
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/* 1. The _filtered buffer. */
|
/* 1. The _filtered buffer. */
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wrap_here ("");
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wrap_here ("");
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|
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/* 2. The stdio buffer. */
|
/* 2. The stdio buffer. */
|
gdb_flush (gdb_stdout);
|
gdb_flush (gdb_stdout);
|
gdb_flush (gdb_stderr);
|
gdb_flush (gdb_stderr);
|
|
|
/* 3. The system-level buffer. */
|
/* 3. The system-level buffer. */
|
gdb_stdout_serial = serial_fdopen (1);
|
gdb_stdout_serial = serial_fdopen (1);
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if (gdb_stdout_serial)
|
if (gdb_stdout_serial)
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{
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{
|
serial_drain_output (gdb_stdout_serial);
|
serial_drain_output (gdb_stdout_serial);
|
serial_un_fdopen (gdb_stdout_serial);
|
serial_un_fdopen (gdb_stdout_serial);
|
}
|
}
|
|
|
annotate_error_begin ();
|
annotate_error_begin ();
|
}
|
}
|
|
|
static void
|
static void
|
print_exception (struct ui_file *file, struct gdb_exception e)
|
print_exception (struct ui_file *file, struct gdb_exception e)
|
{
|
{
|
/* KLUGE: cagney/2005-01-13: Write the string out one line at a time
|
/* KLUGE: cagney/2005-01-13: Write the string out one line at a time
|
as that way the MI's behavior is preserved. */
|
as that way the MI's behavior is preserved. */
|
const char *start;
|
const char *start;
|
const char *end;
|
const char *end;
|
for (start = e.message; start != NULL; start = end)
|
for (start = e.message; start != NULL; start = end)
|
{
|
{
|
end = strchr (start, '\n');
|
end = strchr (start, '\n');
|
if (end == NULL)
|
if (end == NULL)
|
fputs_filtered (start, file);
|
fputs_filtered (start, file);
|
else
|
else
|
{
|
{
|
end++;
|
end++;
|
ui_file_write (file, start, end - start);
|
ui_file_write (file, start, end - start);
|
}
|
}
|
}
|
}
|
fprintf_filtered (file, "\n");
|
fprintf_filtered (file, "\n");
|
|
|
/* Now append the annotation. */
|
/* Now append the annotation. */
|
switch (e.reason)
|
switch (e.reason)
|
{
|
{
|
case RETURN_QUIT:
|
case RETURN_QUIT:
|
annotate_quit ();
|
annotate_quit ();
|
break;
|
break;
|
case RETURN_ERROR:
|
case RETURN_ERROR:
|
/* Assume that these are all errors. */
|
/* Assume that these are all errors. */
|
annotate_error ();
|
annotate_error ();
|
break;
|
break;
|
default:
|
default:
|
internal_error (__FILE__, __LINE__, _("Bad switch."));
|
internal_error (__FILE__, __LINE__, _("Bad switch."));
|
}
|
}
|
}
|
}
|
|
|
void
|
void
|
exception_print (struct ui_file *file, struct gdb_exception e)
|
exception_print (struct ui_file *file, struct gdb_exception e)
|
{
|
{
|
if (e.reason < 0 && e.message != NULL)
|
if (e.reason < 0 && e.message != NULL)
|
{
|
{
|
print_flush ();
|
print_flush ();
|
print_exception (file, e);
|
print_exception (file, e);
|
}
|
}
|
}
|
}
|
|
|
void
|
void
|
exception_fprintf (struct ui_file *file, struct gdb_exception e,
|
exception_fprintf (struct ui_file *file, struct gdb_exception e,
|
const char *prefix, ...)
|
const char *prefix, ...)
|
{
|
{
|
if (e.reason < 0 && e.message != NULL)
|
if (e.reason < 0 && e.message != NULL)
|
{
|
{
|
va_list args;
|
va_list args;
|
|
|
print_flush ();
|
print_flush ();
|
|
|
/* Print the prefix. */
|
/* Print the prefix. */
|
va_start (args, prefix);
|
va_start (args, prefix);
|
vfprintf_filtered (file, prefix, args);
|
vfprintf_filtered (file, prefix, args);
|
va_end (args);
|
va_end (args);
|
|
|
print_exception (file, e);
|
print_exception (file, e);
|
}
|
}
|
}
|
}
|
|
|
void
|
void
|
print_any_exception (struct ui_file *file, const char *prefix,
|
print_any_exception (struct ui_file *file, const char *prefix,
|
struct gdb_exception e)
|
struct gdb_exception e)
|
{
|
{
|
if (e.reason < 0 && e.message != NULL)
|
if (e.reason < 0 && e.message != NULL)
|
{
|
{
|
target_terminal_ours ();
|
target_terminal_ours ();
|
wrap_here (""); /* Force out any buffered output */
|
wrap_here (""); /* Force out any buffered output */
|
gdb_flush (gdb_stdout);
|
gdb_flush (gdb_stdout);
|
annotate_error_begin ();
|
annotate_error_begin ();
|
|
|
/* Print the prefix. */
|
/* Print the prefix. */
|
if (prefix != NULL && prefix[0] != '\0')
|
if (prefix != NULL && prefix[0] != '\0')
|
fputs_filtered (prefix, file);
|
fputs_filtered (prefix, file);
|
print_exception (file, e);
|
print_exception (file, e);
|
}
|
}
|
}
|
}
|
|
|
NORETURN static void ATTR_NORETURN ATTR_FORMAT (printf, 3, 0)
|
NORETURN static void ATTR_NORETURN ATTR_FORMAT (printf, 3, 0)
|
throw_it (enum return_reason reason, enum errors error, const char *fmt,
|
throw_it (enum return_reason reason, enum errors error, const char *fmt,
|
va_list ap)
|
va_list ap)
|
{
|
{
|
struct gdb_exception e;
|
struct gdb_exception e;
|
char *new_message;
|
char *new_message;
|
|
|
/* Save the message. Create the new message before deleting the
|
/* Save the message. Create the new message before deleting the
|
old, the new message may include the old message text. */
|
old, the new message may include the old message text. */
|
new_message = xstrvprintf (fmt, ap);
|
new_message = xstrvprintf (fmt, ap);
|
xfree (last_message);
|
xfree (last_message);
|
last_message = new_message;
|
last_message = new_message;
|
|
|
/* Create the exception. */
|
/* Create the exception. */
|
e.reason = reason;
|
e.reason = reason;
|
e.error = error;
|
e.error = error;
|
e.message = last_message;
|
e.message = last_message;
|
|
|
/* Throw the exception. */
|
/* Throw the exception. */
|
throw_exception (e);
|
throw_exception (e);
|
}
|
}
|
|
|
NORETURN void
|
NORETURN void
|
throw_verror (enum errors error, const char *fmt, va_list ap)
|
throw_verror (enum errors error, const char *fmt, va_list ap)
|
{
|
{
|
throw_it (RETURN_ERROR, error, fmt, ap);
|
throw_it (RETURN_ERROR, error, fmt, ap);
|
}
|
}
|
|
|
NORETURN void
|
NORETURN void
|
throw_vfatal (const char *fmt, va_list ap)
|
throw_vfatal (const char *fmt, va_list ap)
|
{
|
{
|
throw_it (RETURN_QUIT, GDB_NO_ERROR, fmt, ap);
|
throw_it (RETURN_QUIT, GDB_NO_ERROR, fmt, ap);
|
}
|
}
|
|
|
NORETURN void
|
NORETURN void
|
throw_error (enum errors error, const char *fmt, ...)
|
throw_error (enum errors error, const char *fmt, ...)
|
{
|
{
|
va_list args;
|
va_list args;
|
va_start (args, fmt);
|
va_start (args, fmt);
|
throw_it (RETURN_ERROR, error, fmt, args);
|
throw_it (RETURN_ERROR, error, fmt, args);
|
va_end (args);
|
va_end (args);
|
}
|
}
|
|
|
/* Call FUNC() with args FUNC_UIOUT and FUNC_ARGS, catching any
|
/* Call FUNC() with args FUNC_UIOUT and FUNC_ARGS, catching any
|
errors. Set FUNC_CAUGHT to an ``enum return_reason'' if the
|
errors. Set FUNC_CAUGHT to an ``enum return_reason'' if the
|
function is aborted (using throw_exception() or zero if the
|
function is aborted (using throw_exception() or zero if the
|
function returns normally. Set FUNC_VAL to the value returned by
|
function returns normally. Set FUNC_VAL to the value returned by
|
the function or 0 if the function was aborted.
|
the function or 0 if the function was aborted.
|
|
|
Must not be called with immediate_quit in effect (bad things might
|
Must not be called with immediate_quit in effect (bad things might
|
happen, say we got a signal in the middle of a memcpy to quit_return).
|
happen, say we got a signal in the middle of a memcpy to quit_return).
|
This is an OK restriction; with very few exceptions immediate_quit can
|
This is an OK restriction; with very few exceptions immediate_quit can
|
be replaced by judicious use of QUIT.
|
be replaced by judicious use of QUIT.
|
|
|
MASK specifies what to catch; it is normally set to
|
MASK specifies what to catch; it is normally set to
|
RETURN_MASK_ALL, if for no other reason than that the code which
|
RETURN_MASK_ALL, if for no other reason than that the code which
|
calls catch_errors might not be set up to deal with a quit which
|
calls catch_errors might not be set up to deal with a quit which
|
isn't caught. But if the code can deal with it, it generally
|
isn't caught. But if the code can deal with it, it generally
|
should be RETURN_MASK_ERROR, unless for some reason it is more
|
should be RETURN_MASK_ERROR, unless for some reason it is more
|
useful to abort only the portion of the operation inside the
|
useful to abort only the portion of the operation inside the
|
catch_errors. Note that quit should return to the command line
|
catch_errors. Note that quit should return to the command line
|
fairly quickly, even if some further processing is being done. */
|
fairly quickly, even if some further processing is being done. */
|
|
|
/* MAYBE: cagney/1999-11-05: catch_errors() in conjunction with
|
/* MAYBE: cagney/1999-11-05: catch_errors() in conjunction with
|
error() et.al. could maintain a set of flags that indicate the the
|
error() et.al. could maintain a set of flags that indicate the the
|
current state of each of the longjmp buffers. This would give the
|
current state of each of the longjmp buffers. This would give the
|
longjmp code the chance to detect a longjmp botch (before it gets
|
longjmp code the chance to detect a longjmp botch (before it gets
|
to longjmperror()). Prior to 1999-11-05 this wasn't possible as
|
to longjmperror()). Prior to 1999-11-05 this wasn't possible as
|
code also randomly used a SET_TOP_LEVEL macro that directly
|
code also randomly used a SET_TOP_LEVEL macro that directly
|
initialize the longjmp buffers. */
|
initialize the longjmp buffers. */
|
|
|
/* MAYBE: cagney/1999-11-05: Should the catch_errors and cleanups code
|
/* MAYBE: cagney/1999-11-05: Should the catch_errors and cleanups code
|
be consolidated into a single file instead of being distributed
|
be consolidated into a single file instead of being distributed
|
between utils.c and top.c? */
|
between utils.c and top.c? */
|
|
|
int
|
int
|
catch_exceptions (struct ui_out *uiout,
|
catch_exceptions (struct ui_out *uiout,
|
catch_exceptions_ftype *func,
|
catch_exceptions_ftype *func,
|
void *func_args,
|
void *func_args,
|
return_mask mask)
|
return_mask mask)
|
{
|
{
|
return catch_exceptions_with_msg (uiout, func, func_args, NULL, mask);
|
return catch_exceptions_with_msg (uiout, func, func_args, NULL, mask);
|
}
|
}
|
|
|
struct gdb_exception
|
struct gdb_exception
|
catch_exception (struct ui_out *uiout,
|
catch_exception (struct ui_out *uiout,
|
catch_exception_ftype *func,
|
catch_exception_ftype *func,
|
void *func_args,
|
void *func_args,
|
return_mask mask)
|
return_mask mask)
|
{
|
{
|
volatile struct gdb_exception exception;
|
volatile struct gdb_exception exception;
|
TRY_CATCH (exception, mask)
|
TRY_CATCH (exception, mask)
|
{
|
{
|
(*func) (uiout, func_args);
|
(*func) (uiout, func_args);
|
}
|
}
|
return exception;
|
return exception;
|
}
|
}
|
|
|
int
|
int
|
catch_exceptions_with_msg (struct ui_out *uiout,
|
catch_exceptions_with_msg (struct ui_out *uiout,
|
catch_exceptions_ftype *func,
|
catch_exceptions_ftype *func,
|
void *func_args,
|
void *func_args,
|
char **gdberrmsg,
|
char **gdberrmsg,
|
return_mask mask)
|
return_mask mask)
|
{
|
{
|
volatile struct gdb_exception exception;
|
volatile struct gdb_exception exception;
|
volatile int val = 0;
|
volatile int val = 0;
|
TRY_CATCH (exception, mask)
|
TRY_CATCH (exception, mask)
|
{
|
{
|
val = (*func) (uiout, func_args);
|
val = (*func) (uiout, func_args);
|
}
|
}
|
print_any_exception (gdb_stderr, NULL, exception);
|
print_any_exception (gdb_stderr, NULL, exception);
|
gdb_assert (val >= 0);
|
gdb_assert (val >= 0);
|
gdb_assert (exception.reason <= 0);
|
gdb_assert (exception.reason <= 0);
|
if (exception.reason < 0)
|
if (exception.reason < 0)
|
{
|
{
|
/* If caller wants a copy of the low-level error message, make
|
/* If caller wants a copy of the low-level error message, make
|
one. This is used in the case of a silent error whereby the
|
one. This is used in the case of a silent error whereby the
|
caller may optionally want to issue the message. */
|
caller may optionally want to issue the message. */
|
if (gdberrmsg != NULL)
|
if (gdberrmsg != NULL)
|
{
|
{
|
if (exception.message != NULL)
|
if (exception.message != NULL)
|
*gdberrmsg = xstrdup (exception.message);
|
*gdberrmsg = xstrdup (exception.message);
|
else
|
else
|
*gdberrmsg = NULL;
|
*gdberrmsg = NULL;
|
}
|
}
|
return exception.reason;
|
return exception.reason;
|
}
|
}
|
return val;
|
return val;
|
}
|
}
|
|
|
int
|
int
|
catch_errors (catch_errors_ftype *func, void *func_args, char *errstring,
|
catch_errors (catch_errors_ftype *func, void *func_args, char *errstring,
|
return_mask mask)
|
return_mask mask)
|
{
|
{
|
volatile int val = 0;
|
volatile int val = 0;
|
volatile struct gdb_exception exception;
|
volatile struct gdb_exception exception;
|
TRY_CATCH (exception, mask)
|
TRY_CATCH (exception, mask)
|
{
|
{
|
val = func (func_args);
|
val = func (func_args);
|
}
|
}
|
print_any_exception (gdb_stderr, errstring, exception);
|
print_any_exception (gdb_stderr, errstring, exception);
|
if (exception.reason != 0)
|
if (exception.reason != 0)
|
return 0;
|
return 0;
|
return val;
|
return val;
|
}
|
}
|
|
|
int
|
int
|
catch_command_errors (catch_command_errors_ftype * command,
|
catch_command_errors (catch_command_errors_ftype * command,
|
char *arg, int from_tty, return_mask mask)
|
char *arg, int from_tty, return_mask mask)
|
{
|
{
|
volatile struct gdb_exception e;
|
volatile struct gdb_exception e;
|
TRY_CATCH (e, mask)
|
TRY_CATCH (e, mask)
|
{
|
{
|
command (arg, from_tty);
|
command (arg, from_tty);
|
}
|
}
|
print_any_exception (gdb_stderr, NULL, e);
|
print_any_exception (gdb_stderr, NULL, e);
|
if (e.reason < 0)
|
if (e.reason < 0)
|
return 0;
|
return 0;
|
return 1;
|
return 1;
|
}
|
}
|
|
|
