text: // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
  #include <pthread.h>
  #include <stddef.h>
  #include <stdio.h>
  #include <string.h>
  #include <unistd.h>
  
  // Ensure that we can restore a stack of a finished thread.
  
  int g_data;
  
  void __attribute__((noinline)) foobar(int *p) {
    *p = 42;
  }
  
  void *Thread1(void *x) {
    foobar(&g_data);
    return NULL;
  }
  
  void *Thread2(void *x) {
    sleep(1);
    g_data = 43;
    return NULL;
  }
  
  int main() {
    pthread_t t[2];
    pthread_create(&t[0], NULL, Thread1, NULL);
    pthread_create(&t[1], NULL, Thread2, NULL);
    pthread_join(t[0], NULL);
    pthread_join(t[1], NULL);
    return 0;
  }
  
  // CHECK: WARNING: ThreadSanitizer: data race
  // CHECK:   Write of size 4 at {{.*}} by thread T2:
  // CHECK:   Previous write of size 4 at {{.*}} by thread T1:
  // CHECK:     #0 foobar
  // CHECK:     #1 Thread1
  // CHECK:   Thread T1 (tid={{.*}}, finished) created by main thread at:
  // CHECK:     #0 pthread_create
  // CHECK:     #1 main
  