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zdtm/thread-bomb: Limit stack size in thread-bomb

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ia32 thread-bomb test failed when compel refused to seize the test,
trying to mmap() in remote process and getting ENOMEM.
It turns to be true - remote process thread-bomb was filled with 8Mb
mappings created by pthread_create() (the default stack size).

So, that 1024 * 8Mb is a bit too much to place in 4Gb.

Fix the test on 32-bit platforms by using much smaller stack.
Also check the return value of pthread_create().

Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrei Vagin <avagin@gmail.com>
This commit is contained in:
Dmitry Safonov 2019-05-02 02:34:45 +01:00 • committed by Andrei Vagin
parent 0e22e245e5
commit 8c5b25cbf5
1 changed files with 24 additions and 3 deletions
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27
test/zdtm/transition/thread-bomb.c
View file

@ -11,6 +11,10 @@
#define exit_group(code) \
syscall(__NR_exit_group, code)
static pthread_attr_t attr;
/* Having in mind setup with 64 Kb large pages */
static const size_t stack_size = 64 * 1024;
static void *thread_fn(void *arg)
{
pthread_t t, p, *self;
@ -24,14 +28,27 @@ static void *thread_fn(void *arg)
self = malloc(sizeof(*self));
*self = pthread_self();
pthread_create(&t, NULL, thread_fn, self);
pthread_create(&t, &attr, thread_fn, self);
return NULL;
}
int main(int argc, char **argv)
{
char *val;
int max_nr = 1024, i;
char *val;
int err;
err = pthread_attr_init(&attr);
if (err) {
pr_err("pthread_attr_init(): %d\n", err);
exit(1);
}
err = pthread_attr_setstacksize(&attr, stack_size);
if (err) {
pr_err("pthread_attr_setstacksize(): %d\n", err);
exit(1);
}
val = getenv("ZDTM_THREAD_BOMB");
if (val)
@ -43,7 +60,11 @@ int main(int argc, char **argv)
for (i = 0; i < max_nr; i++) {
pthread_t p;
pthread_create(&p, NULL, thread_fn, NULL);
err = pthread_create(&p, &attr, thread_fn, NULL);
if (err) {
pr_err("pthread_create(): %d\n", err);
exit(1);
}
}
test_daemon();