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Diffstat (limited to 'gdb/common/common-exceptions.c')
| -rw-r--r-- | gdb/common/common-exceptions.c | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/gdb/common/common-exceptions.c b/gdb/common/common-exceptions.c deleted file mode 100644 index 9f21025..0000000 --- a/gdb/common/common-exceptions.c +++ /dev/null @@ -1,235 +0,0 @@ -/* Exception (throw catch) mechanism, for GDB, the GNU debugger. - - Copyright (C) 1986-2019 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 "common-defs.h" -#include "common-exceptions.h" -#include <forward_list> - -/* Possible catcher states. */ -enum catcher_state { - /* Initial state, a new catcher has just been created. */ - CATCHER_CREATED, - /* The catch code is running. */ - CATCHER_RUNNING, - CATCHER_RUNNING_1, - /* The catch code threw an exception. */ - CATCHER_ABORTING -}; - -/* Possible catcher actions. */ -enum catcher_action { - CATCH_ITER, - CATCH_ITER_1, - CATCH_THROWING -}; - -struct catcher -{ - enum catcher_state state = CATCHER_CREATED; - /* Jump buffer pointing back at the exception handler. */ - jmp_buf buf; - /* Status buffer belonging to the exception handler. */ - struct gdb_exception exception; -}; - -/* Where to go for throw_exception(). */ -static std::forward_list<struct catcher> catchers; - -jmp_buf * -exceptions_state_mc_init () -{ - catchers.emplace_front (); - return &catchers.front ().buf; -} - -/* Catcher state machine. Returns non-zero if the m/c should be run - again, zero if it should abort. */ - -static int -exceptions_state_mc (enum catcher_action action) -{ - switch (catchers.front ().state) - { - case CATCHER_CREATED: - switch (action) - { - case CATCH_ITER: - /* Allow the code to run the catcher. */ - catchers.front ().state = CATCHER_RUNNING; - return 1; - default: - internal_error (__FILE__, __LINE__, _("bad state")); - } - case CATCHER_RUNNING: - switch (action) - { - case CATCH_ITER: - /* No error/quit has occured. */ - return 0; - case CATCH_ITER_1: - catchers.front ().state = CATCHER_RUNNING_1; - return 1; - case CATCH_THROWING: - catchers.front ().state = CATCHER_ABORTING; - /* See also throw_exception. */ - return 1; - default: - internal_error (__FILE__, __LINE__, _("bad switch")); - } - case CATCHER_RUNNING_1: - switch (action) - { - case CATCH_ITER: - /* The did a "break" from the inner while loop. */ - return 0; - case CATCH_ITER_1: - catchers.front ().state = CATCHER_RUNNING; - return 0; - case CATCH_THROWING: - catchers.front ().state = CATCHER_ABORTING; - /* See also throw_exception. */ - return 1; - default: - internal_error (__FILE__, __LINE__, _("bad switch")); - } - case CATCHER_ABORTING: - switch (action) - { - case CATCH_ITER: - { - /* Exit normally if this catcher can handle this - exception. The caller analyses the func return - values. */ - return 0; - } - default: - internal_error (__FILE__, __LINE__, _("bad state")); - } - default: - internal_error (__FILE__, __LINE__, _("bad switch")); - } -} - -int -exceptions_state_mc_catch (struct gdb_exception *exception, - int mask) -{ - *exception = std::move (catchers.front ().exception); - catchers.pop_front (); - - if (exception->reason < 0) - { - if (mask & RETURN_MASK (exception->reason)) - { - /* Exit normally and let the caller handle the - exception. */ - return 1; - } - - /* The caller didn't request that the event be caught, relay the - event to the next exception_catch/CATCH_SJLJ. */ - throw_exception_sjlj (*exception); - } - - /* No exception was thrown. */ - return 0; -} - -int -exceptions_state_mc_action_iter (void) -{ - return exceptions_state_mc (CATCH_ITER); -} - -int -exceptions_state_mc_action_iter_1 (void) -{ - return exceptions_state_mc (CATCH_ITER_1); -} - -/* Return EXCEPTION to the nearest containing CATCH_SJLJ block. */ - -void -throw_exception_sjlj (const struct gdb_exception &exception) -{ - /* Jump to the nearest CATCH_SJLJ block, communicating REASON to - that call via setjmp's return value. Note that REASON can't be - zero, by definition in common-exceptions.h. */ - exceptions_state_mc (CATCH_THROWING); - enum return_reason reason = exception.reason; - catchers.front ().exception = exception; - longjmp (catchers.front ().buf, reason); -} - -/* Implementation of throw_exception that uses C++ try/catch. */ - -void -throw_exception (gdb_exception &&exception) -{ - if (exception.reason == RETURN_QUIT) - throw gdb_exception_quit (std::move (exception)); - else if (exception.reason == RETURN_ERROR) - throw gdb_exception_error (std::move (exception)); - else - gdb_assert_not_reached ("invalid return reason"); -} - -static void ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (3, 0) -throw_it (enum return_reason reason, enum errors error, const char *fmt, - va_list ap) -{ - if (reason == RETURN_QUIT) - throw gdb_exception_quit (fmt, ap); - else if (reason == RETURN_ERROR) - throw gdb_exception_error (error, fmt, ap); - else - gdb_assert_not_reached ("invalid return reason"); -} - -void -throw_verror (enum errors error, const char *fmt, va_list ap) -{ - throw_it (RETURN_ERROR, error, fmt, ap); -} - -void -throw_vquit (const char *fmt, va_list ap) -{ - throw_it (RETURN_QUIT, GDB_NO_ERROR, fmt, ap); -} - -void -throw_error (enum errors error, const char *fmt, ...) -{ - va_list args; - - va_start (args, fmt); - throw_verror (error, fmt, args); - va_end (args); -} - -void -throw_quit (const char *fmt, ...) -{ - va_list args; - - va_start (args, fmt); - throw_vquit (fmt, args); - va_end (args); -} |