X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fexceptions.h;h=5711c1a35e1e81cbbefb3c3cbba84e99e650430f;hb=2b2798cc9716f45f752ea03411b6f9c9afc17cc6;hp=919738a7375e1b3dbff9566a5aff0424c86ce0ed;hpb=8a076db965ba49f891b959752db7c8bb0c524688;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/exceptions.h b/gdb/exceptions.h index 919738a737..5711c1a35e 100644 --- a/gdb/exceptions.h +++ b/gdb/exceptions.h @@ -1,14 +1,12 @@ /* 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 Free Software - Foundation, Inc. + Copyright (C) 1986-2016 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, @@ -17,84 +15,26 @@ 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 . */ #ifndef EXCEPTIONS_H #define EXCEPTIONS_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, - /* Add more errors here. */ - NR_ERRORS -}; - -struct exception -{ - enum return_reason reason; - enum errors error; - const char *message; -}; - -/* A pre-defined non-exception. */ -extern const struct exception exception_none; +#include "ui-out.h" /* If E is an exception, print it's error message on the specified - stream. */ -extern void exception_print (struct ui_file *file, const char *pre_print, - struct exception e); - -/* 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_reason (enum return_reason reason) 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_vsilent (const char *fmt, va_list ap) ATTR_NORETURN; - + 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 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. @@ -108,10 +48,19 @@ extern NORETURN void throw_vsilent (const char *fmt, va_list ap) ATTR_NORETURN; 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(). */ @@ -119,38 +68,24 @@ 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, - char *errstring, return_mask mask); + 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 *errstring, char **gdberrmsg, + 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