glibc/nptl/tst-default-attr.c

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/* Verify that pthread_[gs]etattr_default_np work correctly.
Copyright (C) 2013-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
Prefer https to http for gnu.org and fsf.org URLs 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
2019-09-07 05:40:42 +00:00
<https://www.gnu.org/licenses/>. */
#include <pthread.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdbool.h>
#define RETURN_IF_FAIL(f, ...) \
({ \
int ret = f (__VA_ARGS__); \
if (ret != 0) \
{ \
printf ("%s:%d: %s returned %d (errno = %d)\n", __FILE__, __LINE__, \
#f, ret, errno); \
return ret; \
} \
})
static int (*verify_result) (pthread_attr_t *);
static size_t stacksize = 1024 * 1024;
static size_t guardsize;
static bool do_join = true;
static int running = 0;
static int detach_failed = 0;
static pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t c = PTHREAD_COND_INITIALIZER;
static void *
thr (void *unused __attribute__ ((unused)))
{
pthread_attr_t attr;
int ret;
memset (&attr, 0xab, sizeof attr);
/* To verify that the pthread_setattr_default_np worked. */
if ((ret = pthread_getattr_default_np (&attr)) != 0)
{
printf ("pthread_getattr_default_np failed: %s\n", strerror (ret));
goto out;
}
if ((ret = (*verify_result) (&attr)) != 0)
goto out;
memset (&attr, 0xab, sizeof attr);
/* To verify that the attributes actually got applied. */
if ((ret = pthread_getattr_np (pthread_self (), &attr)) != 0)
{
printf ("pthread_getattr_default_np failed: %s\n", strerror (ret));
goto out;
}
ret = (*verify_result) (&attr);
out:
if (!do_join)
{
pthread_mutex_lock (&m);
running--;
pthread_cond_signal (&c);
pthread_mutex_unlock (&m);
detach_failed |= ret;
}
return (void *) (uintptr_t) ret;
}
static int
run_threads (const pthread_attr_t *attr)
{
pthread_t t;
void *tret = NULL;
RETURN_IF_FAIL (pthread_setattr_default_np, attr);
/* Run twice to ensure that the attributes do not get overwritten in the
first run somehow. */
for (int i = 0; i < 2; i++)
{
RETURN_IF_FAIL (pthread_create, &t, NULL, thr, NULL);
if (do_join)
RETURN_IF_FAIL (pthread_join, t, &tret);
else
{
pthread_mutex_lock (&m);
running++;
pthread_mutex_unlock (&m);
}
if (tret != NULL)
{
puts ("Thread failed");
return 1;
}
}
/* Stay in sync for detached threads and get their status. */
while (!do_join)
{
pthread_mutex_lock (&m);
if (running == 0)
{
pthread_mutex_unlock (&m);
break;
}
pthread_cond_wait (&c, &m);
pthread_mutex_unlock (&m);
}
return 0;
}
static int
verify_detach_result (pthread_attr_t *attr)
{
int state;
RETURN_IF_FAIL (pthread_attr_getdetachstate, attr, &state);
if (state != PTHREAD_CREATE_DETACHED)
{
puts ("failed to set detach state");
return 1;
}
return 0;
}
static int
do_detach_test (void)
{
pthread_attr_t attr;
do_join = false;
RETURN_IF_FAIL (pthread_attr_init, &attr);
RETURN_IF_FAIL (pthread_attr_setdetachstate, &attr, PTHREAD_CREATE_DETACHED);
RETURN_IF_FAIL (run_threads, &attr);
return detach_failed;
}
static int
verify_affinity_result (pthread_attr_t *attr)
{
cpu_set_t cpuset;
RETURN_IF_FAIL (pthread_attr_getaffinity_np, attr, sizeof (cpuset), &cpuset);
if (!CPU_ISSET (0, &cpuset))
{
puts ("failed to set cpu affinity");
return 1;
}
return 0;
}
static int
do_affinity_test (void)
{
pthread_attr_t attr;
RETURN_IF_FAIL (pthread_attr_init, &attr);
/* Processor affinity. Like scheduling policy, this could fail if the user
does not have the necessary privileges. So we only spew a warning if
pthread_create fails with EPERM. A computer has at least one CPU. */
cpu_set_t cpuset;
CPU_ZERO (&cpuset);
CPU_SET (0, &cpuset);
RETURN_IF_FAIL (pthread_attr_setaffinity_np, &attr, sizeof (cpuset), &cpuset);
int ret = run_threads (&attr);
if (ret == EPERM)
{
printf ("Skipping CPU Affinity test: %s\n", strerror (ret));
return 0;
}
else if (ret != 0)
return ret;
return 0;
}
static int
verify_sched_result (pthread_attr_t *attr)
{
int inherited, policy;
struct sched_param param;
RETURN_IF_FAIL (pthread_attr_getinheritsched, attr, &inherited);
if (inherited != PTHREAD_EXPLICIT_SCHED)
{
puts ("failed to set EXPLICIT_SCHED (%d != %d)");
return 1;
}
RETURN_IF_FAIL (pthread_attr_getschedpolicy, attr, &policy);
if (policy != SCHED_RR)
{
printf ("failed to set SCHED_RR (%d != %d)\n", policy, SCHED_RR);
return 1;
}
RETURN_IF_FAIL (pthread_attr_getschedparam, attr, &param);
if (param.sched_priority != 42)
{
printf ("failed to set sched_priority (%d != %d)\n",
param.sched_priority, 42);
return 1;
}
return 0;
}
static int
do_sched_test (void)
{
pthread_attr_t attr;
RETURN_IF_FAIL (pthread_attr_init, &attr);
/* Scheduling policy. Note that we don't always test these since it's
possible that the user the tests run as don't have the appropriate
privileges. */
RETURN_IF_FAIL (pthread_attr_setinheritsched, &attr, PTHREAD_EXPLICIT_SCHED);
RETURN_IF_FAIL (pthread_attr_setschedpolicy, &attr, SCHED_RR);
struct sched_param param;
param.sched_priority = 42;
RETURN_IF_FAIL (pthread_attr_setschedparam, &attr, &param);
int ret = run_threads (&attr);
if (ret == EPERM)
{
printf ("Skipping Scheduler Attributes test: %s\n", strerror (ret));
return 0;
}
else if (ret != 0)
return ret;
return 0;
}
static int
verify_guardsize_result (pthread_attr_t *attr)
{
size_t guard;
RETURN_IF_FAIL (pthread_attr_getguardsize, attr, &guard);
if (guardsize != guard)
{
printf ("failed to set guardsize (%zu, %zu)\n", guardsize, guard);
return 1;
}
return 0;
}
static int
do_guardsize_test (void)
{
long int pagesize = sysconf (_SC_PAGESIZE);
pthread_attr_t attr;
if (pagesize < 0)
{
printf ("sysconf failed: %s\n", strerror (errno));
return 1;
}
RETURN_IF_FAIL (pthread_getattr_default_np, &attr);
/* Increase default guardsize by a page. */
RETURN_IF_FAIL (pthread_attr_getguardsize, &attr, &guardsize);
guardsize += pagesize;
RETURN_IF_FAIL (pthread_attr_setguardsize, &attr, guardsize);
RETURN_IF_FAIL (run_threads, &attr);
return 0;
}
static int
verify_stacksize_result (pthread_attr_t *attr)
{
size_t stack;
RETURN_IF_FAIL (pthread_attr_getstacksize, attr, &stack);
if (stacksize != stack)
{
printf ("failed to set default stacksize (%zu, %zu)\n", stacksize, stack);
return 1;
}
return 0;
}
static int
do_stacksize_test (void)
{
long int pagesize = sysconf (_SC_PAGESIZE);
pthread_attr_t attr;
if (pagesize < 0)
{
printf ("sysconf failed: %s\n", strerror (errno));
return 1;
}
/* Perturb the size by a page so that we're not aligned on the 64K boundary.
pthread_create does this perturbation on x86 to avoid causing the 64k
aliasing conflict. We want to prevent pthread_create from doing that
since it is not consistent for all architectures. */
stacksize += pagesize;
RETURN_IF_FAIL (pthread_attr_init, &attr);
/* Run twice to ensure that we don't give a false positive. */
RETURN_IF_FAIL (pthread_attr_setstacksize, &attr, stacksize);
RETURN_IF_FAIL (run_threads, &attr);
stacksize *= 2;
RETURN_IF_FAIL (pthread_attr_setstacksize, &attr, stacksize);
RETURN_IF_FAIL (run_threads, &attr);
return 0;
}
/* We test each attribute separately because sched and affinity tests may need
additional user privileges that may not be available during the test run.
Each attribute test is a set of two functions, viz. a function to set the
default attribute (do_foo_test) and another to verify its result
(verify_foo_result). Each test spawns a thread and checks (1) if the
attribute values were applied correctly and (2) if the change in the default
value reflected. */
static int
do_test (void)
{
puts ("stacksize test");
verify_result = verify_stacksize_result;
RETURN_IF_FAIL (do_stacksize_test);
puts ("guardsize test");
verify_result = verify_guardsize_result;
RETURN_IF_FAIL (do_guardsize_test);
puts ("sched test");
verify_result = verify_sched_result;
RETURN_IF_FAIL (do_sched_test);
puts ("affinity test");
verify_result = verify_affinity_result;
RETURN_IF_FAIL (do_affinity_test);
puts ("detach test");
verify_result = verify_detach_result;
RETURN_IF_FAIL (do_detach_test);
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"