llvm-project/compiler-rt/lib/tsan/lit_tests/cond_race.cc

37 lines
728 B
C++

// RUN: %clang_tsan -O1 %s -o %t && not %t 2>&1 | FileCheck %s
// CHECK: ThreadSanitizer: data race
// CHECK: pthread_cond_signal
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
struct Ctx {
pthread_mutex_t m;
pthread_cond_t c;
bool done;
};
void *thr(void *p) {
Ctx *c = (Ctx*)p;
pthread_mutex_lock(&c->m);
c->done = true;
pthread_mutex_unlock(&c->m);
pthread_cond_signal(&c->c);
return 0;
}
int main() {
Ctx *c = new Ctx();
pthread_mutex_init(&c->m, 0);
pthread_cond_init(&c->c, 0);
pthread_t th;
pthread_create(&th, 0, thr, c);
pthread_mutex_lock(&c->m);
while (!c->done)
pthread_cond_wait(&c->c, &c->m);
pthread_mutex_unlock(&c->m);
delete c;
pthread_join(th, 0);
}