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5a82c74822
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
128 lines
2.9 KiB
C
128 lines
2.9 KiB
C
/* Test rdlock overflow.
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Copyright (C) 2000-2019 Free Software Foundation, Inc.
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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 License as
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published by the Free Software Foundation; either version 2.1 of the
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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; see the file COPYING.LIB. If
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not, see <https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <error.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#include <pthreadP.h>
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#define NREADERS 15
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#define READTRIES 5000
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#define DELAY 1000000
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static pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
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static int eagain_returned = 0;
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static int success_returned = 0;
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static void *
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reader_thread (void *nr)
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{
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struct timespec delay;
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int n;
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delay.tv_sec = 0;
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delay.tv_nsec = DELAY;
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for (n = 0; n < READTRIES; ++n)
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{
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int err = pthread_rwlock_rdlock (&lock);
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if (err == EAGAIN)
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{
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atomic_store_relaxed (&eagain_returned, 1);
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continue;
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}
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else if (err == 0)
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atomic_store_relaxed (&success_returned, 1);
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else
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{
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puts ("rdlock failed");
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exit (1);
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}
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nanosleep (&delay, NULL);
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if (pthread_rwlock_unlock (&lock) != 0)
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{
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puts ("unlock for reader failed");
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exit (1);
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}
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}
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return NULL;
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}
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static int
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do_test (void)
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{
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pthread_t thrd[NREADERS];
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int n;
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void *res;
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/* Set the rwlock so that it's close to a reader overflow.
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PTHREAD_RWLOCK_WRPHASE and PTHREAD_RWLOCK_WRLOCK are zero initially. */
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unsigned int readers = PTHREAD_RWLOCK_READER_OVERFLOW
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- ((NREADERS / 3) << PTHREAD_RWLOCK_READER_SHIFT);
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lock.__data.__readers = readers;
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for (n = 0; n < NREADERS; ++n)
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if (pthread_create (&thrd[n], NULL, reader_thread,
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(void *) (long int) n) != 0)
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{
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puts ("reader create failed");
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exit (1);
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}
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/* Wait for all the threads. */
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for (n = 0; n < NREADERS; ++n)
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if (pthread_join (thrd[n], &res) != 0)
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{
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puts ("reader join failed");
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exit (1);
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}
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if (atomic_load_relaxed (&eagain_returned) == 0)
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{
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puts ("EAGAIN has never been returned");
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exit (1);
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}
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if (atomic_load_relaxed (&success_returned) == 0)
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{
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puts ("rdlock was never successfully acquired");
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exit (1);
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}
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if (lock.__data.__readers != readers)
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{
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puts ("__readers in rwlock differs from initial value");
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exit (1);
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}
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return 0;
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}
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#define TIMEOUT 100
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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