src/compiler-rt/test/tsan/mmap_stress.cc

   1 // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
   2 #include "test.h"
   3 #include <errno.h>
   4 #include <sys/mman.h>
   5
   6 void *SubWorker(void *arg) {
   7   (void)arg;
   8   const int kMmapSize =  65536;
   9   for (int i = 0; i < 500; i++) {
  10     int *ptr = (int*)mmap(0, kMmapSize, PROT_READ | PROT_WRITE,
  11                           MAP_PRIVATE | MAP_ANON, -1, 0);
  12     *ptr = 42;
  13     munmap(ptr, kMmapSize);
  14   }
  15   return 0;
  16 }
  17
  18 void *Worker1(void *arg) {
  19   (void)arg;
  20   pthread_t th[4];
  21   for (int i = 0; i < 4; i++)
  22     pthread_create(&th[i], 0, SubWorker, 0);
  23   for (int i = 0; i < 4; i++)
  24     pthread_join(th[i], 0);
  25   return 0;
  26 }
  27
  28 void *Worker(void *arg) {
  29   (void)arg;
  30   pthread_t th[4];
  31   for (int i = 0; i < 4; i++)
  32     pthread_create(&th[i], 0, Worker1, 0);
  33   for (int i = 0; i < 4; i++)
  34     pthread_join(th[i], 0);
  35   return 0;
  36 }
  37
  38 int main() {
  39   pthread_t th[4];
  40   for (int i = 0; i < 4; i++)
  41     pthread_create(&th[i], 0, Worker, 0);
  42   for (int i = 0; i < 4; i++)
  43     pthread_join(th[i], 0);
  44   fprintf(stderr, "DONE\n");
  45 }
  46
  47 // CHECK: DONE