gcc/testsuite/c-c++-common/tsan/simple_stack.c

   1 /* { dg-shouldfail "tsan" } */
   2 /* { dg-additional-options "-ldl" } */
   3
   4 #include <pthread.h>
   5 #include "tsan_barrier.h"
   6
   7 static pthread_barrier_t barrier;
   8 int Global;
   9
  10 void __attribute__((noinline)) foo1() {
  11   Global = 42;
  12 }
  13
  14 void __attribute__((noinline)) bar1() {
  15   volatile int tmp = 42; (void)tmp;
  16   foo1();
  17 }
  18
  19 void __attribute__((noinline)) foo2() {
  20   volatile int v = Global; (void)v;
  21 }
  22
  23 void __attribute__((noinline)) bar2() {
  24   volatile int tmp = 42; (void)tmp;
  25   foo2();
  26 }
  27
  28 void *Thread1(void *x) {
  29   barrier_wait(&barrier);
  30   bar1();
  31   return NULL;
  32 }
  33
  34 void *Thread2(void *x) {
  35   bar2();
  36   barrier_wait(&barrier);
  37   return NULL;
  38 }
  39
  40 void StartThread(pthread_t *t, void *(*f)(void*)) {
  41   pthread_create(t, NULL, f, NULL);
  42 }
  43
  44 int main() {
  45   barrier_init(&barrier, 2);
  46   pthread_t t[2];
  47   StartThread(&t[0], Thread1);
  48   StartThread(&t[1], Thread2);
  49   pthread_join(t[0], NULL);
  50   pthread_join(t[1], NULL);
  51   return 0;
  52 }
  53
  54 /* { dg-output "WARNING: ThreadSanitizer: data race.*" } */
  55 /* { dg-output "  Write of size 4 at .* by thread T1:(\n|\r\n|\r)" } */
  56 /* { dg-output "    #0 foo1.* .*(simple_stack.c:11|\\?{2}:0) (.*)" } */
  57 /* { dg-output "    #1 bar1.* .*(simple_stack.c:16|\\?{2}:0) (.*)" } */
  58 /* { dg-output "    #2 Thread1.* .*(simple_stack.c:30|\\?{2}:0) (.*)" } */
  59 /* { dg-output "  Previous read of size 4 at .* by thread T2:(\n|\r\n|\r)" } */
  60 /* { dg-output "    #0 foo2.* .*(simple_stack.c:20|\\?{2}:0) (.*)" } */
  61 /* { dg-output "    #1 bar2.* .*(simple_stack.c:25|\\?{2}:0) (.*)" } */
  62 /* { dg-output "    #2 Thread2.* .*(simple_stack.c:35|\\?{2}:0) (.*)" } */
  63 /* { dg-output "  Thread T1 \\(tid=.*, running\\) created by main thread at:(\n|\r\n|\r)" } */
  64 /* { dg-output "    #0 pthread_create .* (.*)" } */
  65 /* { dg-output "    #1 StartThread.* .*(simple_stack.c:41|\\?{2}:0) (.*)" } */
  66 /* { dg-output "  Thread T2 (.*) created by main thread at:(\n|\r\n|\r)" } */
  67 /* { dg-output "    #0 pthread_create .* (.*)" } */
  68 /* { dg-output "    #1 StartThread.* .*(simple_stack.c:41|\\?{2}:0) (.*)" } */