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// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
#include "test.h"
extern "C" {
void AnnotateIgnoreReadsBegin(const char *f, int l);
void AnnotateIgnoreReadsEnd(const char *f, int l);
void AnnotateIgnoreWritesBegin(const char *f, int l);
void AnnotateIgnoreWritesEnd(const char *f, int l);
}
int *g;
void *Thread(void *a) {
int *p = 0;
while ((p = __atomic_load_n(&g, __ATOMIC_RELAXED)) == 0)
usleep(100); // spin-wait
*p = 42;
return 0;
}
int main() {
pthread_t t;
pthread_create(&t, 0, Thread, 0);
AnnotateIgnoreWritesBegin(__FILE__, __LINE__);
int *p = new int(0);
AnnotateIgnoreWritesEnd(__FILE__, __LINE__);
__atomic_store_n(&g, p, __ATOMIC_RELAXED);
pthread_join(t, 0);
delete p;
fprintf(stderr, "OK\n");
return 0;
}
// CHECK-NOT: WARNING: ThreadSanitizer: data race
// CHECK: OK
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