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// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
#include "../test.h"
#include <memory.h>
// A reproducer for a known issue.
// See reference to double_race.cpp in tsan_rtl_report.cpp for an explanation.
long long buf[2];
volatile int nreport;
__attribute__((disable_sanitizer_instrumentation)) void
__sanitizer_report_error_summary(const char *summary) {
nreport++;
}
const int kEventPCBits = 61;
extern "C" __attribute__((disable_sanitizer_instrumentation)) bool
__tsan_symbolize_external(unsigned long pc, char *func_buf,
unsigned long func_siz, char *file_buf,
unsigned long file_siz, int *line, int *col) {
if (pc >> kEventPCBits) {
printf("bad PC passed to __tsan_symbolize_external: %lx\n", pc);
_exit(1);
}
return true;
}
void *Thread(void *arg) {
barrier_wait(&barrier);
memset(buf, 2, sizeof(buf));
return 0;
}
int main() {
barrier_init(&barrier, 2);
pthread_t t;
pthread_create(&t, 0, Thread, 0);
memset(buf, 1, sizeof(buf));
barrier_wait(&barrier);
pthread_join(t, 0);
return 0;
}
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK: Write of size 8 at {{.*}} by thread T1:
// CHECK: #0 {{.*}}memset
// CHECK: #{{[12]}} Thread
// CHECK-NOT: bad PC passed to __tsan_symbolize_external
// CHECK-NOT: __sanitizer_report_error_summary
// CHECK-NOT: WARNING: ThreadSanitizer: data race
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