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// RUN: %clangxx_tsan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
#include "test.h"
int Global;
volatile int x;
const int kSize = 64 << 10;
volatile long data[kSize];
void __attribute__((noinline)) foo() {
for (int i = 0; i < kSize; i++)
data[i]++;
}
void *Thread(void *a) {
__atomic_store_n(&x, 1, __ATOMIC_RELEASE);
foo();
data[0]++;
if (a != 0)
barrier_wait(&barrier);
return 0;
}
int main() {
barrier_init(&barrier, 2);
for (int i = 0; i < 50; i++) {
pthread_t t;
pthread_create(&t, 0, Thread, 0);
pthread_join(t, 0);
}
pthread_t t;
pthread_create(&t, 0, Thread, (void*)1);
barrier_wait(&barrier);
for (int i = 0; i < kSize; i++)
data[i]++;
pthread_join(t, 0);
fprintf(stderr, "DONE\n");
return 0;
}
// Previously this test produced bogus stack traces like:
// Previous write of size 8 at 0x0000006a8ff8 by thread T17:
// #0 foo() restore_stack.cc:13:5 (restore_stack.cc.exe+0x00000040622c)
// #1 Thread(void*) restore_stack.cc:18:3 (restore_stack.cc.exe+0x000000406283)
// #2 __tsan_thread_start_func rtl/tsan_interceptors.cc:886 (restore_stack.cc.exe+0x00000040a749)
// #3 Thread(void*) restore_stack.cc:18:3 (restore_stack.cc.exe+0x000000406283)
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK-NOT: __tsan_thread_start_func
// CHECK-NOT: #3 Thread
// CHECK: DONE
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