glibc/misc
Joseph Myers 548f467fa1 Avoid -Wstringop-overflow warning in pthread_cleanup_push macros
GCC 11 introduces a -Wstringop-overflow warning for calls to functions
with an array argument passed as a pointer to memory not large enough
for that array.  This includes the __sigsetjmp calls from
pthread_cleanup_push macros, because those use a structure in
__pthread_unwind_buf_t, which has a common initial subsequence with
jmp_buf but does not include the saved signal mask; this is OK in this
case because the second argument to __sigsetjmp is 0 so the signal
mask is not accessed.

To avoid this warning, use a function alias __sigsetjmp_cancel with
first argument an array of exactly the type used in the calls to the
function, if using GCC 11 or later.  With older compilers, continue to
use __sigsetjmp with a cast, to avoid any issues with compilers
predating the returns_twice attribute not applying the same special
handling to __sigsetjmp_cancel as to __sigsetjmp.

Tested with build-many-glibcs.py for arm-linux-gnueabi that this fixes
the testsuite build failures.
2020-10-30 22:25:42 +00:00
..
bits Prepare redirections for IEEE long double on powerpc64le 2020-02-17 15:28:29 -06:00
sys Avoid -Wstringop-overflow warning in pthread_cleanup_push macros 2020-10-30 22:25:42 +00:00
acct.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
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bug-hsearch1.c .. 2009-01-23 20:41:36 +00:00
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daemon.c Remove internal usage of extensible stat functions 2020-09-11 14:35:32 -03:00
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err.h Rename __LONG_DOUBLE_USES_FLOAT128 to __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI 2020-04-30 08:52:08 -05:00
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fstab.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
fstab.h Remove pre-ISO C support 2012-01-07 23:57:22 -05:00
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getttyent.c Fix -Os getc_unlocked linknamespace, localplt issues (bug 15105, bug 19463). 2018-02-21 18:01:11 +00:00
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Makefile Add the __libc_single_threaded variable 2020-07-06 11:15:58 +02:00
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single_threaded.c Add the __libc_single_threaded variable 2020-07-06 11:15:58 +02:00
sstk.c misc: Remove sstk from the autogenerated system call list 2020-04-28 17:13:25 +02:00
stab.h Update. 1997-06-21 02:59:26 +00:00
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syscall.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
syscall.h update from main archive 960107 1997-01-07 23:29:44 +00:00
sysexits.h Update. 1999-06-09 13:08:30 +00:00
syslog.c Correct locking and cancellation cleanup in syslog functions (bug 26100) 2020-08-18 11:27:03 +02:00
syslog.h initial import 1995-02-18 01:27:10 +00:00
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tst-empty.c Move all tests out of the csu subdirectory 2016-12-21 11:52:19 +01:00
tst-error1.c Split DIAG_* macros to new header libc-diag.h. 2017-02-25 09:59:46 -05:00
tst-fd_to_filename.c <fd_to_filename.h>: Add type safety and port to Hurd 2020-02-18 13:42:29 +01:00
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tst-hsearch.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-insremque.c [BZ #2766] 2006-06-17 17:01:42 +00:00
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tst-mntent2.c Fix warning in misc/tst-mntent2.c. 2014-12-16 10:27:16 +01:00
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tst-mntent-blank-passno.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-mntent.c getmntent: fix memory corruption w/blank lines [BZ #18887] 2015-08-29 18:07:00 -04:00
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tst-syscalls.c Add a syscall test for [BZ #25810] 2020-04-22 09:48:10 -07:00
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ttyent.h Remove pre-ISO C support 2012-01-07 23:57:22 -05:00
ttyslot.c As a minor cleanup remove the (r)index defines from include/string.h as 2017-02-06 18:15:18 +00:00
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Versions Add the __libc_single_threaded variable 2020-07-06 11:15:58 +02:00
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