test/tsan/deep_stack1.cc

   1 // RUN: %clangxx_tsan -O1 %s -o %t -DORDER1 && not %t 2>&1 | FileCheck %s
   2 // RUN: %clangxx_tsan -O1 %s -o %t -DORDER2 && not %t 2>&1 | FileCheck %s
   3 #include <pthread.h>
   4 #include <stdio.h>
   5 #include <unistd.h>
   6
   7 volatile int X;
   8 volatile int N;
   9 void (*volatile F)();
  10
  11 static void foo() {
  12   if (--N == 0)
  13     X = 42;
  14   else
  15     F();
  16 }
  17
  18 void *Thread(void *p) {
  19 #ifdef ORDER1
  20   sleep(1);
  21 #endif
  22   F();
  23   return 0;
  24 }
  25
  26 int main() {
  27   N = 50000;
  28   F = foo;
  29   pthread_t t;
  30   pthread_attr_t a;
  31   pthread_attr_init(&a);
  32   pthread_attr_setstacksize(&a, N * 256 + (1 << 20));
  33   pthread_create(&t, &a, Thread, 0);
  34 #ifdef ORDER2
  35   sleep(1);
  36 #endif
  37   X = 43;
  38   pthread_join(t, 0);
  39 }
  40
  41 // CHECK: WARNING: ThreadSanitizer: data race
  42 // CHECK:    #100 foo
  43 // We must output suffucuently large stack (at least 100 frames)
  44