| // 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.cc in tsan_rtl_report.cc for an explanation. |
| |
| char buf[16]; |
| volatile int nreport; |
| |
| void __sanitizer_report_error_summary(const char *summary) { |
| nreport++; |
| } |
| |
| const int kEventPCBits = 61; |
| |
| extern "C" 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: #1 Thread |
| // CHECK-NOT: bad PC passed to __tsan_symbolize_external |
| // CHECK: WARNING: ThreadSanitizer: data race |
| // CHECK: Write of size 8 at {{.*}} by thread T1: |
| // CHECK: #0 Thread |