/* Exception (throw catch) mechanism, for GDB, the GNU debugger.
- Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
- 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free
- Software Foundation, Inc.
+ Copyright (C) 1986-2014 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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef EXCEPTIONS_H
#define EXCEPTIONS_H
-struct ui_out;
-
-#include <setjmp.h>
-
-/* Reasons for calling throw_exceptions(). NOTE: all reason values
- must be less than zero. enum value 0 is reserved for internal use
- as the return value from an initial setjmp(). The function
- catch_exceptions() reserves values >= 0 as legal results from its
- wrapped function. */
-
-enum return_reason
- {
- /* User interrupt. */
- RETURN_QUIT = -2,
- /* Any other error. */
- RETURN_ERROR
- };
-
-#define RETURN_MASK(reason) (1 << (int)(-reason))
-#define RETURN_MASK_QUIT RETURN_MASK (RETURN_QUIT)
-#define RETURN_MASK_ERROR RETURN_MASK (RETURN_ERROR)
-#define RETURN_MASK_ALL (RETURN_MASK_QUIT | RETURN_MASK_ERROR)
-typedef int return_mask;
-
-/* Describe all exceptions. */
-
-enum errors {
- NO_ERROR,
- /* Any generic error, the corresponding text is in
- exception.message. */
- GENERIC_ERROR,
- NOT_FOUND_ERROR,
- /* Add more errors here. */
- NR_ERRORS
-};
-
-struct exception
-{
- enum return_reason reason;
- enum errors error;
- const char *message;
-};
+#include "ui-out.h"
/* A pre-defined non-exception. */
-extern const struct exception exception_none;
-
-/* Wrap set/long jmp so that it's more portable (internal to
- exceptions). */
-
-#if defined(HAVE_SIGSETJMP)
-#define EXCEPTIONS_SIGJMP_BUF sigjmp_buf
-#define EXCEPTIONS_SIGSETJMP(buf) sigsetjmp((buf), 1)
-#define EXCEPTIONS_SIGLONGJMP(buf,val) siglongjmp((buf), (val))
-#else
-#define EXCEPTIONS_SIGJMP_BUF jmp_buf
-#define EXCEPTIONS_SIGSETJMP(buf) setjmp(buf)
-#define EXCEPTIONS_SIGLONGJMP(buf,val) longjmp((buf), (val))
-#endif
-
-/* Functions to drive the exceptions state m/c (internal to
- exceptions). */
-EXCEPTIONS_SIGJMP_BUF *exceptions_state_mc_init (struct ui_out *func_uiout,
- volatile struct exception *
- exception,
- return_mask mask);
-int exceptions_state_mc_action_iter (void);
-int exceptions_state_mc_action_iter_1 (void);
-
-/* Macro to wrap up standard try/catch behavior.
-
- The double loop lets us correctly handle code "break"ing out of the
- try catch block. (It works as the "break" only exits the inner
- "while" loop, the outer for loop detects this handling it
- correctly.) Of course "return" and "goto" are not so lucky.
-
- For instance:
-
- *INDENT-OFF*
-
- volatile struct exception e;
- TRY_CATCH (e, RETURN_MASK_ERROR)
- {
- }
- switch (e.reason)
- {
- case RETURN_ERROR: ...
- }
-
- */
-
-#define TRY_CATCH(EXCEPTION,MASK) \
- for (EXCEPTIONS_SIGSETJMP \
- (*exceptions_state_mc_init (uiout, &(EXCEPTION), (MASK))); \
- exceptions_state_mc_action_iter (); ) \
- while (exceptions_state_mc_action_iter_1 ())
-
-/* *INDENT-ON* */
-
+extern const struct gdb_exception exception_none;
/* If E is an exception, print it's error message on the specified
- stream. for _fprintf, prefix the message with PREFIX... */
-extern void exception_print (struct ui_file *file, struct exception e);
-extern void exception_fprintf (struct ui_file *file, struct exception e,
+ stream. For _fprintf, prefix the message with PREFIX... */
+extern void exception_print (struct ui_file *file, struct gdb_exception e);
+extern void exception_fprintf (struct ui_file *file, struct gdb_exception e,
const char *prefix,
- ...) ATTR_FORMAT (printf, 3, 4);
-
-/* Throw an exception (as described by "struct exception"). Will
- execute a LONG JUMP to the inner most containing exception handler
- established using catch_exceptions() (or similar).
-
- Code normally throws an exception using error() et.al. For various
- reaons, GDB also contains code that throws an exception directly.
- For instance, the remote*.c targets contain CNTRL-C signal handlers
- that propogate the QUIT event up the exception chain. ``This could
- be a good thing or a dangerous thing.'' -- the Existential
- Wombat. */
-
-extern NORETURN void throw_exception (struct exception exception) ATTR_NORETURN;
-extern NORETURN void throw_verror (enum errors, const char *fmt,
- va_list ap) ATTR_NORETURN;
-extern NORETURN void throw_vfatal (const char *fmt, va_list ap) ATTR_NORETURN;
-extern NORETURN void throw_error (enum errors error, const char *fmt,
- ...) ATTR_NORETURN ATTR_FORMAT (printf, 2, 3);
-
-/* Instead of deprecated_throw_reason, code should use catch_exception
- and throw_exception. */
-extern NORETURN void deprecated_throw_reason (enum return_reason reason) ATTR_NORETURN;
+ ...) ATTRIBUTE_PRINTF (3, 4);
/* Call FUNC(UIOUT, FUNC_ARGS) but wrapped within an exception
handler. If an exception (enum return_reason) is thrown using
throw_exception() than all cleanups installed since
catch_exceptions() was entered are invoked, the (-ve) exception
value is then returned by catch_exceptions. If FUNC() returns
- normally (with a postive or zero return value) then that value is
+ normally (with a positive or zero return value) then that value is
returned by catch_exceptions(). It is an internal_error() for
FUNC() to return a negative value.
copy of the gdb error message. This is used when a silent error is
issued and the caller wants to manually issue the error message.
+ MASK specifies what to catch; it is normally set to
+ 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
+ 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
+ useful to abort only the portion of the operation inside the
+ catch_errors. Note that quit should return to the command line
+ fairly quickly, even if some further processing is being done.
+
FIXME; cagney/2001-08-13: The need to override the global UIOUT
builder variable should just go away.
- This function superseeds catch_errors().
+ This function supersedes catch_errors().
This function uses SETJMP() and LONGJUMP(). */
char **gdberrmsg,
return_mask mask);
-/* This function, in addition, suppresses the printing of the captured
- error message. It's up to the client to print it. */
-
-extern struct exception catch_exception (struct ui_out *uiout,
- catch_exception_ftype *func,
- void *func_args,
- return_mask mask);
-
/* If CATCH_ERRORS_FTYPE throws an error, catch_errors() returns zero
- otherwize the result from CATCH_ERRORS_FTYPE is returned. It is
+ otherwize the result from CATCH_ERRORS_FTYPE is returned. It is
probably useful for CATCH_ERRORS_FTYPE to always return a non-zero
- value. It's unfortunate that, catch_errors() does not return an
+ value. It's unfortunate that, catch_errors() does not return an
indication of the exact exception that it caught - quit_flag might
help.
- This function is superseeded by catch_exceptions(). */
+ This function is superseded by catch_exceptions(). */
typedef int (catch_errors_ftype) (void *);
extern int catch_errors (catch_errors_ftype *, void *, char *, return_mask);
-/* Template to catch_errors() that wraps calls to command
- functions. */
-
-typedef void (catch_command_errors_ftype) (char *, int);
-extern int catch_command_errors (catch_command_errors_ftype *func, char *command, int from_tty, return_mask);
-
#endif