thr->fast_state.IncrementEpoch();
// Can't increment epoch w/o writing to the trace as well.
TraceAddEvent(thr, thr->fast_state, EventTypeMop, 0);
- ReleaseImpl(thr, pc, &s->clock);
+ ReleaseStoreImpl(thr, pc, &s->clock);
NoTsanAtomicStore(a, v, mo);
s->mtx.Unlock();
}
--- /dev/null
+// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
+#include "test.h"
+
+long long Data;
+long long Sync;
+
+void *Thread1(void *x) {
+ Data++;
+ __atomic_store_n(&Sync, 1, __ATOMIC_RELEASE);
+ barrier_wait(&barrier);
+ barrier_wait(&barrier);
+ return NULL;
+}
+
+void *Thread2(void *x) {
+ barrier_wait(&barrier);
+ if (__atomic_load_n(&Sync, __ATOMIC_RELAXED) != 1)
+ exit(0);
+ // This store must terminate release sequence of the store in Thread1,
+ // thus tsan must detect race between Thread1 and main on Data.
+ __atomic_store_n(&Sync, 2, __ATOMIC_RELEASE);
+ barrier_wait(&barrier);
+ return NULL;
+}
+
+int main() {
+ barrier_init(&barrier, 3);
+ pthread_t t[2];
+ pthread_create(&t[0], NULL, Thread1, NULL);
+ pthread_create(&t[1], NULL, Thread2, NULL);
+ barrier_wait(&barrier);
+ barrier_wait(&barrier);
+ if (__atomic_load_n(&Sync, __ATOMIC_ACQUIRE) != 2)
+ exit(0);
+ if (Data != 1)
+ exit(0);
+ pthread_join(t[0], NULL);
+ pthread_join(t[1], NULL);
+ fprintf(stderr, "DONE\n");
+ return 0;
+}
+
+// CHECK: WARNING: ThreadSanitizer: data race
+// CHECK: Read
+// CHECK: #0 main
+// CHECK: Previous write
+// CHECK: #0 Thread1
+// CHECK: Location is global 'Data'
+// CHECK: DONE