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package/localedef: fix host gcc-11.x compile
Add two upstream patches fixing host gcc-11.x compile. Fixes: - https://bugs.busybox.net/show_bug.cgi?id=13806 In file included from ../include/pthread.h:1, from ../sysdeps/nptl/thread_db.h:25, from ../nptl/descr.h:32, from ../sysdeps/x86_64/nptl/tls.h:130, from ../sysdeps/generic/libc-tsd.h:44, from ./localeinfo.h:224, from programs/ld-ctype.c:37: ../sysdeps/nptl/pthread.h:734:47: error: argument 1 of type ‘struct __jmp_buf_tag *’ declared as a pointer [-Werror=array-parameter=] 734 | extern int __sigsetjmp (struct __jmp_buf_tag *__env, int __savemask) __THROWNL; | ~~~~~~~~~~~~~~~~~~~~~~^~~~~ In file included from ../include/setjmp.h:2, from ../nptl/descr.h:24, from ../sysdeps/x86_64/nptl/tls.h:130, from ../sysdeps/generic/libc-tsd.h:44, from ./localeinfo.h:224, from programs/ld-ctype.c:37: ../setjmp/setjmp.h:54:46: note: previously declared as an array ‘struct __jmp_buf_tag[1]’ 54 | extern int __sigsetjmp (struct __jmp_buf_tag __env[1], int __savemask) __THROWNL; | ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~ Signed-off-by: Peter Seiderer <ps.report@gmx.net> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
This commit is contained in:
Peter Seiderer
committed by
Yann E. MORIN
Yann E. MORIN
parent
7320e5dd62
commit
4174f79a57
@@ -0,0 +1,155 @@
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From 44f1469daff3a0bfe67fb5839243f114ace3bad8 Mon Sep 17 00:00:00 2001
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From: Joseph Myers <joseph@codesourcery.com>
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Date: Mon, 5 Oct 2020 16:46:46 +0000
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Subject: [PATCH 3/4] Fix GCC 11 -Warray-parameter warning for __sigsetjmp (bug
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26647)
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This patch fixes part of bug 26647 (-Werror=array-parameter error
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building with GCC 11 because of __sigsetjmp being declared using an
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array parameter in one header and a pointer parameter in another).
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The fix is to split the struct __jmp_buf_tag definition out to a
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separate bits/types/ header so it can be included in pthread.h, so
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that pthread.h can declare __sigsetjmp with the type contents visible,
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so can use an array (as in setjmp.h) rather than a pointer in the
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declaration.
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Note that several other build failures with GCC 11 remain. This does
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not fix the jmp_buf-related -Wstringop-overflow errors (also discussed
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in bug 26647), or -Warray-parameter errors for other functions (bug
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26686), or -Warray-bounds errors (bug 26687).
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Tested, with older compilers, natively for x86_64 and with
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build-many-glibc.py for aarch64-linux-gnu. Tested with
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build-many-glibcs.py with GCC mainline for aarch64-linux-gnu that this
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gets past the -Warray-parameter issue for __sigsetjmp (with the next
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build failure being the other one discussed in bug 26647).
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[Upstream: https://github.com/bminor/glibc/commit/19302b27bdacfe87e861ff46fc0fbad60dd6602d.patch]
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Signed-off-by: Peter Seiderer <ps.report@gmx.net>
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---
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include/bits/types/struct___jmp_buf_tag.h | 1 +
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setjmp/Makefile | 3 +-
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setjmp/bits/types/struct___jmp_buf_tag.h | 37 +++++++++++++++++++++++
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setjmp/setjmp.h | 15 +--------
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sysdeps/nptl/pthread.h | 5 +--
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5 files changed, 44 insertions(+), 17 deletions(-)
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create mode 100644 include/bits/types/struct___jmp_buf_tag.h
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create mode 100644 setjmp/bits/types/struct___jmp_buf_tag.h
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diff --git a/include/bits/types/struct___jmp_buf_tag.h b/include/bits/types/struct___jmp_buf_tag.h
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new file mode 100644
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index 00000000..e3250150
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--- /dev/null
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+++ b/include/bits/types/struct___jmp_buf_tag.h
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@@ -0,0 +1 @@
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+#include <setjmp/bits/types/struct___jmp_buf_tag.h>
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diff --git a/setjmp/Makefile b/setjmp/Makefile
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index dcac5693..603f61d7 100644
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--- a/setjmp/Makefile
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+++ b/setjmp/Makefile
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@@ -22,7 +22,8 @@ subdir := setjmp
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include ../Makeconfig
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-headers := setjmp.h bits/setjmp.h bits/setjmp2.h
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+headers := setjmp.h bits/setjmp.h bits/setjmp2.h \
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+ bits/types/struct___jmp_buf_tag.h
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routines := setjmp sigjmp bsd-setjmp bsd-_setjmp \
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longjmp __longjmp jmp-unwind
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diff --git a/setjmp/bits/types/struct___jmp_buf_tag.h b/setjmp/bits/types/struct___jmp_buf_tag.h
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new file mode 100644
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index 00000000..9d8634f1
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--- /dev/null
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+++ b/setjmp/bits/types/struct___jmp_buf_tag.h
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@@ -0,0 +1,37 @@
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+/* Define struct __jmp_buf_tag.
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+ 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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+
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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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+
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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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+
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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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+#ifndef __jmp_buf_tag_defined
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+#define __jmp_buf_tag_defined 1
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+
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+#include <bits/setjmp.h> /* Get `__jmp_buf'. */
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+#include <bits/types/__sigset_t.h>
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+
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+/* Calling environment, plus possibly a saved signal mask. */
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+struct __jmp_buf_tag
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+ {
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+ /* NOTE: The machine-dependent definitions of `__sigsetjmp'
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+ assume that a `jmp_buf' begins with a `__jmp_buf' and that
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+ `__mask_was_saved' follows it. Do not move these members
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+ or add others before it. */
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+ __jmp_buf __jmpbuf; /* Calling environment. */
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+ int __mask_was_saved; /* Saved the signal mask? */
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+ __sigset_t __saved_mask; /* Saved signal mask. */
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+ };
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+
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+#endif
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diff --git a/setjmp/setjmp.h b/setjmp/setjmp.h
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index 4e3443c3..c6c59f40 100644
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--- a/setjmp/setjmp.h
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+++ b/setjmp/setjmp.h
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@@ -27,20 +27,7 @@
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__BEGIN_DECLS
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#include <bits/setjmp.h> /* Get `__jmp_buf'. */
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-#include <bits/types/__sigset_t.h>
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-
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-/* Calling environment, plus possibly a saved signal mask. */
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-struct __jmp_buf_tag
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- {
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- /* NOTE: The machine-dependent definitions of `__sigsetjmp'
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- assume that a `jmp_buf' begins with a `__jmp_buf' and that
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- `__mask_was_saved' follows it. Do not move these members
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- or add others before it. */
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- __jmp_buf __jmpbuf; /* Calling environment. */
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- int __mask_was_saved; /* Saved the signal mask? */
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- __sigset_t __saved_mask; /* Saved signal mask. */
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- };
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-
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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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diff --git a/sysdeps/nptl/pthread.h b/sysdeps/nptl/pthread.h
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index 8a403cbf..d4194da7 100644
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--- a/sysdeps/nptl/pthread.h
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+++ b/sysdeps/nptl/pthread.h
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@@ -28,6 +28,7 @@
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#include <bits/wordsize.h>
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#include <bits/types/struct_timespec.h>
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#include <bits/types/__sigset_t.h>
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+#include <bits/types/struct___jmp_buf_tag.h>
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/* Detach state. */
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@@ -730,8 +731,8 @@ extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
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#endif
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/* Function used in the macros. */
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-struct __jmp_buf_tag;
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-extern int __sigsetjmp (struct __jmp_buf_tag *__env, int __savemask) __THROWNL;
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+extern int __sigsetjmp (struct __jmp_buf_tag __env[1],
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+ int __savemask) __THROWNL;
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/* Mutex handling. */
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--
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2.31.1
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@@ -0,0 +1,125 @@
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From ea50889c35fb73ed9e140d800303aae9148c2888 Mon Sep 17 00:00:00 2001
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From: Joseph Myers <joseph@codesourcery.com>
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Date: Fri, 30 Oct 2020 22:25:42 +0000
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Subject: [PATCH 4/4] Avoid -Wstringop-overflow warning in pthread_cleanup_push
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macros
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GCC 11 introduces a -Wstringop-overflow warning for calls to functions
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with an array argument passed as a pointer to memory not large enough
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for that array. This includes the __sigsetjmp calls from
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pthread_cleanup_push macros, because those use a structure in
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__pthread_unwind_buf_t, which has a common initial subsequence with
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jmp_buf but does not include the saved signal mask; this is OK in this
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case because the second argument to __sigsetjmp is 0 so the signal
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mask is not accessed.
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To avoid this warning, use a function alias __sigsetjmp_cancel with
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first argument an array of exactly the type used in the calls to the
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function, if using GCC 11 or later. With older compilers, continue to
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use __sigsetjmp with a cast, to avoid any issues with compilers
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predating the returns_twice attribute not applying the same special
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handling to __sigsetjmp_cancel as to __sigsetjmp.
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Tested with build-many-glibcs.py for arm-linux-gnueabi that this fixes
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the testsuite build failures.
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[Upstream: https://github.com/bminor/glibc/commit/548f467fa14ffe7d955beeb31b30e2aeae4467e0.patch]
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Signed-off-by: Peter Seiderer <ps.report@gmx.net>
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---
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misc/sys/cdefs.h | 8 ++++++++
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sysdeps/nptl/pthread.h | 37 +++++++++++++++++++++++++++----------
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2 files changed, 35 insertions(+), 10 deletions(-)
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diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
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index 38221d0b..ce877487 100644
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--- a/misc/sys/cdefs.h
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+++ b/misc/sys/cdefs.h
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@@ -556,4 +556,12 @@ _Static_assert (0, "IEEE 128-bits long double requires redirection on this platf
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# define __attr_access(x)
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#endif
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+/* Specify that a function such as setjmp or vfork may return
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+ twice. */
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+#if __GNUC_PREREQ (4, 1)
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+# define __attribute_returns_twice__ __attribute__ ((__returns_twice__))
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+#else
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+# define __attribute_returns_twice__ /* Ignore. */
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+#endif
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+
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#endif /* sys/cdefs.h */
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diff --git a/sysdeps/nptl/pthread.h b/sysdeps/nptl/pthread.h
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index d4194da7..3a34d823 100644
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--- a/sysdeps/nptl/pthread.h
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+++ b/sysdeps/nptl/pthread.h
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@@ -512,13 +512,15 @@ extern void pthread_testcancel (void);
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/* Cancellation handling with integration into exception handling. */
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+struct __cancel_jmp_buf_tag
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+{
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+ __jmp_buf __cancel_jmp_buf;
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+ int __mask_was_saved;
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+};
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+
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typedef struct
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{
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- struct
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- {
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- __jmp_buf __cancel_jmp_buf;
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- int __mask_was_saved;
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- } __cancel_jmp_buf[1];
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+ struct __cancel_jmp_buf_tag __cancel_jmp_buf[1];
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void *__pad[4];
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} __pthread_unwind_buf_t __attribute__ ((__aligned__));
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@@ -658,8 +660,8 @@ __pthread_cleanup_routine (struct __pthread_cleanup_frame *__frame)
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__pthread_unwind_buf_t __cancel_buf; \
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void (*__cancel_routine) (void *) = (routine); \
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void *__cancel_arg = (arg); \
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- int __not_first_call = __sigsetjmp ((struct __jmp_buf_tag *) (void *) \
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- __cancel_buf.__cancel_jmp_buf, 0); \
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+ int __not_first_call = __sigsetjmp_cancel (__cancel_buf.__cancel_jmp_buf, \
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+ 0); \
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if (__glibc_unlikely (__not_first_call)) \
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{ \
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__cancel_routine (__cancel_arg); \
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@@ -693,8 +695,8 @@ extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
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__pthread_unwind_buf_t __cancel_buf; \
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void (*__cancel_routine) (void *) = (routine); \
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void *__cancel_arg = (arg); \
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- int __not_first_call = __sigsetjmp ((struct __jmp_buf_tag *) (void *) \
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- __cancel_buf.__cancel_jmp_buf, 0); \
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+ int __not_first_call = __sigsetjmp_cancel (__cancel_buf.__cancel_jmp_buf, \
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+ 0); \
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if (__glibc_unlikely (__not_first_call)) \
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{ \
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__cancel_routine (__cancel_arg); \
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@@ -730,9 +732,24 @@ extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
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;
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#endif
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-/* Function used in the macros. */
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+/* Function used in the macros. Calling __sigsetjmp, with its first
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+ argument declared as an array, results in a -Wstringop-overflow
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+ warning from GCC 11 because struct pthread_unwind_buf is smaller
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+ than jmp_buf. The calls from the macros have __SAVEMASK set to 0,
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+ so nothing beyond the common prefix is used and this warning is a
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+ false positive. Use an alias with its first argument declared to
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+ use the type in the macros if possible to avoid this warning. */
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+#if __GNUC_PREREQ (11, 0)
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+extern int __REDIRECT_NTHNL (__sigsetjmp_cancel,
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+ (struct __cancel_jmp_buf_tag __env[1],
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+ int __savemask),
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+ __sigsetjmp) __attribute_returns_twice__;
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+#else
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+# define __sigsetjmp_cancel(env, savemask) \
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+ __sigsetjmp ((struct __jmp_buf_tag *) (void *) (env), (savemask))
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extern int __sigsetjmp (struct __jmp_buf_tag __env[1],
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int __savemask) __THROWNL;
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+#endif
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/* Mutex handling. */
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--
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2.31.1
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Reference in New Issue
Block a user