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19302b27bd
This patch fixes part of bug 26647 (-Werror=array-parameter error building with GCC 11 because of __sigsetjmp being declared using an array parameter in one header and a pointer parameter in another). The fix is to split the struct __jmp_buf_tag definition out to a separate bits/types/ header so it can be included in pthread.h, so that pthread.h can declare __sigsetjmp with the type contents visible, so can use an array (as in setjmp.h) rather than a pointer in the declaration. Note that several other build failures with GCC 11 remain. This does not fix the jmp_buf-related -Wstringop-overflow errors (also discussed in bug 26647), or -Warray-parameter errors for other functions (bug 26686), or -Warray-bounds errors (bug 26687). Tested, with older compilers, natively for x86_64 and with build-many-glibc.py for aarch64-linux-gnu. Tested with build-many-glibcs.py with GCC mainline for aarch64-linux-gnu that this gets past the -Warray-parameter issue for __sigsetjmp (with the next build failure being the other one discussed in bug 26647).
93 lines
3.1 KiB
C
93 lines
3.1 KiB
C
/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/*
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* ISO C99 Standard: 7.13 Nonlocal jumps <setjmp.h>
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*/
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#ifndef _SETJMP_H
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#define _SETJMP_H 1
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#include <features.h>
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__BEGIN_DECLS
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#include <bits/setjmp.h> /* Get `__jmp_buf'. */
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#include <bits/types/struct___jmp_buf_tag.h>
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typedef struct __jmp_buf_tag jmp_buf[1];
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/* Store the calling environment in ENV, also saving the signal mask.
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Return 0. */
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extern int setjmp (jmp_buf __env) __THROWNL;
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/* Store the calling environment in ENV, also saving the
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signal mask if SAVEMASK is nonzero. Return 0.
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This is the internal name for `sigsetjmp'. */
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extern int __sigsetjmp (struct __jmp_buf_tag __env[1], int __savemask) __THROWNL;
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/* Store the calling environment in ENV, not saving the signal mask.
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Return 0. */
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extern int _setjmp (struct __jmp_buf_tag __env[1]) __THROWNL;
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/* Do not save the signal mask. This is equivalent to the `_setjmp'
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BSD function. */
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#define setjmp(env) _setjmp (env)
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/* Jump to the environment saved in ENV, making the
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`setjmp' call there return VAL, or 1 if VAL is 0. */
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extern void longjmp (struct __jmp_buf_tag __env[1], int __val)
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__THROWNL __attribute__ ((__noreturn__));
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#if defined __USE_MISC || defined __USE_XOPEN
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/* Same. Usually `_longjmp' is used with `_setjmp', which does not save
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the signal mask. But it is how ENV was saved that determines whether
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`longjmp' restores the mask; `_longjmp' is just an alias. */
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extern void _longjmp (struct __jmp_buf_tag __env[1], int __val)
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__THROWNL __attribute__ ((__noreturn__));
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#endif
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#ifdef __USE_POSIX
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/* Use the same type for `jmp_buf' and `sigjmp_buf'.
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The `__mask_was_saved' flag determines whether
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or not `longjmp' will restore the signal mask. */
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typedef struct __jmp_buf_tag sigjmp_buf[1];
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/* Store the calling environment in ENV, also saving the
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signal mask if SAVEMASK is nonzero. Return 0. */
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# define sigsetjmp(env, savemask) __sigsetjmp (env, savemask)
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/* Jump to the environment saved in ENV, making the
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sigsetjmp call there return VAL, or 1 if VAL is 0.
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Restore the signal mask if that sigsetjmp call saved it.
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This is just an alias `longjmp'. */
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extern void siglongjmp (sigjmp_buf __env, int __val)
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__THROWNL __attribute__ ((__noreturn__));
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#endif /* Use POSIX. */
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/* Define helper functions to catch unsafe code. */
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#if __USE_FORTIFY_LEVEL > 0
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# include <bits/setjmp2.h>
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#endif
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__END_DECLS
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#endif /* setjmp.h */
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