xref: /aosp_15_r20/external/compiler-rt/test/msan/tls_reuse.cc (revision 7c3d14c8b49c529e04be81a3ce6f5cc23712e4c6) 
1*7c3d14c8STreehugger Robot // RUN: %clangxx_msan -O0 %s -o %t && %run %t
2*7c3d14c8STreehugger Robot 
3*7c3d14c8STreehugger Robot // Check that when TLS block is reused between threads, its shadow is cleaned.
4*7c3d14c8STreehugger Robot 
5*7c3d14c8STreehugger Robot #include <pthread.h>
6*7c3d14c8STreehugger Robot #include <stdio.h>
7*7c3d14c8STreehugger Robot 
8*7c3d14c8STreehugger Robot int __thread x;
9*7c3d14c8STreehugger Robot 
ThreadFn(void *)10*7c3d14c8STreehugger Robot void *ThreadFn(void *) {
11*7c3d14c8STreehugger Robot   if (!x)
12*7c3d14c8STreehugger Robot     printf("zzz\n");
13*7c3d14c8STreehugger Robot   int y;
14*7c3d14c8STreehugger Robot   int * volatile p = &y;
15*7c3d14c8STreehugger Robot   x = *p;
16*7c3d14c8STreehugger Robot   return 0;
17*7c3d14c8STreehugger Robot }
18*7c3d14c8STreehugger Robot 
main(void)19*7c3d14c8STreehugger Robot int main(void) {
20*7c3d14c8STreehugger Robot   pthread_t t;
21*7c3d14c8STreehugger Robot   for (int i = 0; i < 100; ++i) {
22*7c3d14c8STreehugger Robot     pthread_create(&t, 0, ThreadFn, 0);
23*7c3d14c8STreehugger Robot     pthread_join(t, 0);
24*7c3d14c8STreehugger Robot   }
25*7c3d14c8STreehugger Robot   return 0;
26*7c3d14c8STreehugger Robot }
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