94 lines
4 KiB
C
94 lines
4 KiB
C
/* Exception (throw catch) mechanism, for GDB, the GNU debugger.
|
|
|
|
Copyright (C) 1986-2015 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/>. */
|
|
|
|
#ifndef EXCEPTIONS_H
|
|
#define EXCEPTIONS_H
|
|
|
|
#include "ui-out.h"
|
|
|
|
/* A pre-defined non-exception. */
|
|
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 gdb_exception e);
|
|
extern void exception_fprintf (struct ui_file *file, struct gdb_exception e,
|
|
const char *prefix,
|
|
...) 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 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.
|
|
|
|
For the period of the FUNC() call: UIOUT is installed as the output
|
|
builder; ERRSTRING is installed as the error/quit message; and a
|
|
new cleanup_chain is established. The old values are restored
|
|
before catch_exceptions() returns.
|
|
|
|
The variant catch_exceptions_with_msg() is the same as
|
|
catch_exceptions() but adds the ability to return an allocated
|
|
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 supersedes catch_errors().
|
|
|
|
This function uses SETJMP() and LONGJUMP(). */
|
|
|
|
struct ui_out;
|
|
typedef int (catch_exceptions_ftype) (struct ui_out *ui_out, void *args);
|
|
extern int catch_exceptions (struct ui_out *uiout,
|
|
catch_exceptions_ftype *func, void *func_args,
|
|
return_mask mask);
|
|
typedef void (catch_exception_ftype) (struct ui_out *ui_out, void *args);
|
|
extern int catch_exceptions_with_msg (struct ui_out *uiout,
|
|
catch_exceptions_ftype *func,
|
|
void *func_args,
|
|
char **gdberrmsg,
|
|
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
|
|
probably useful for CATCH_ERRORS_FTYPE to always return a non-zero
|
|
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 superseded by catch_exceptions(). */
|
|
|
|
typedef int (catch_errors_ftype) (void *);
|
|
extern int catch_errors (catch_errors_ftype *, void *, char *, return_mask);
|
|
|
|
#endif
|