benign_race.cpp
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// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
#include "test.h"
int Global;
int WTFGlobal;
extern "C" {
void AnnotateBenignRaceSized(const char *f, int l,
void *mem, unsigned int size, const char *desc);
void WTFAnnotateBenignRaceSized(const char *f, int l,
void *mem, unsigned int size,
const char *desc);
}
void *Thread(void *x) {
Global = 42;
WTFGlobal = 142;
barrier_wait(&barrier);
return 0;
}
int main() {
barrier_init(&barrier, 2);
AnnotateBenignRaceSized(__FILE__, __LINE__,
&Global, sizeof(Global), "Race on Global");
WTFAnnotateBenignRaceSized(__FILE__, __LINE__,
&WTFGlobal, sizeof(WTFGlobal),
"Race on WTFGlobal");
pthread_t t;
pthread_create(&t, 0, Thread, 0);
barrier_wait(&barrier);
Global = 43;
WTFGlobal = 143;
pthread_join(t, 0);
fprintf(stderr, "OK\n");
}
// CHECK-NOT: WARNING: ThreadSanitizer: data race