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// RUN: %clangxx_tsan -O1 %s -o %t
// RUN: %run %t 2>&1 | FileCheck %s
// RUN: %run %t arg 2>&1 | FileCheck %s
// RUN: %run %t arg arg 2>&1 | FileCheck %s
#include "test.h"
// Test for destruction of pthread_cond_t.
// POSIX states that it is safe to destroy a condition variable upon which no
// threads are currently blocked. That is, it is not necessary to wait untill
// other threads return from pthread_cond_wait, they just need to be unblocked.
pthread_mutex_t m;
pthread_cond_t c;
bool done1, done2;
void *thr(void *p) {
pthread_mutex_lock(&m);
done1 = true;
pthread_cond_signal(&c);
while (!done2)
pthread_cond_wait(&c, &m);
pthread_mutex_unlock(&m);
return 0;
}
int main(int argc, char **argv) {
pthread_t th;
pthread_mutex_init(&m, 0);
pthread_cond_init(&c, 0);
pthread_create(&th, 0, thr, 0);
pthread_mutex_lock(&m);
while (!done1)
pthread_cond_wait(&c, &m);
done2 = true;
// Any of these sequences is legal.
if (argc == 1) {
pthread_cond_signal(&c);
pthread_mutex_unlock(&m);
pthread_cond_destroy(&c);
} else if (argc == 2) {
pthread_mutex_unlock(&m);
pthread_cond_signal(&c);
pthread_cond_destroy(&c);
} else {
pthread_cond_signal(&c);
pthread_cond_destroy(&c);
pthread_mutex_unlock(&m);
}
pthread_join(th, 0);
fprintf(stderr, "DONE\n");
}
// CHECK-NOT: ThreadSanitizer: data race
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