text: // Stress test recovery mode with many threads.
  //
  // RUN: %clangxx_asan -fsanitize-recover=address -pthread %s -o %t
  //
  // RUN: %env_asan_opts=halt_on_error=false:suppress_equal_pcs=false %run %t 1 10 >%t.log 2>&1
  // RUN: grep 'ERROR: AddressSanitizer: use-after-poison' %t.log | count 10
  // RUN: FileCheck %s <%t.log
  //
  // RUN: %env_asan_opts=halt_on_error=false:suppress_equal_pcs=false:exitcode=0 %run %t 10 20 >%t.log 2>&1
  // RUN: grep 'ERROR: AddressSanitizer: use-after-poison' %t.log | count 200
  // RUN: FileCheck %s <%t.log
  //
  // RUN: %env_asan_opts=halt_on_error=false:exitcode=0 %run %t 10 20 >%t.log 2>&1
  // RUN: grep 'ERROR: AddressSanitizer: use-after-poison' %t.log | count 1
  // RUN: FileCheck %s <%t.log
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <pthread.h>
  #include <time.h>
  
  #include <sanitizer/asan_interface.h>
  
  size_t nthreads = 10;
  size_t niter = 10;
  
  void random_delay(unsigned *seed) {
    *seed = 1664525 * *seed + 1013904223;
    struct timespec delay = { 0, (*seed % 1000) * 1000 };
    nanosleep(&delay, 0);
  }
  
  void *run(void *arg) {
    unsigned seed = (unsigned)(size_t)arg;
  
    volatile char tmp[2];
    __asan_poison_memory_region(&tmp, sizeof(tmp));
  
    for (size_t i = 0; i < niter; ++i) {
      random_delay(&seed);
      // CHECK: ERROR: AddressSanitizer: use-after-poison
      volatile int idx = 0;
      tmp[idx] = 0;
    }
  
    return 0;
  }
  
  int main(int argc, char **argv) {
    if (argc != 3) {
      fprintf(stderr, "Syntax: %s nthreads niter\n", argv[0]);
      exit(1);
    }
  
    nthreads = (size_t)strtoul(argv[1], 0, 0);
    niter = (size_t)strtoul(argv[2], 0, 0);
  
    pthread_t *tids = new pthread_t[nthreads];
  
    for (size_t i = 0; i < nthreads; ++i) {
      if (0 != pthread_create(&tids[i], 0, run, (void *)i)) {
        fprintf(stderr, "Failed to create thread\n");
        exit(1);
      }
    }
  
    for (size_t i = 0; i < nthreads; ++i) {
      if (0 != pthread_join(tids[i], 0)) {
        fprintf(stderr, "Failed to join thread\n");
        exit(1);
      }
    }
  
    // CHECK: All threads terminated
    printf("All threads terminated\n");
  
    delete [] tids;
  
    return 0;
  }
  