forked from OSchip/llvm-project
43 lines
1000 B
C++
43 lines
1000 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
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#include "test.h"
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// Ensure that we can restore a stack of a finished thread.
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int g_data;
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void __attribute__((noinline)) foobar(int *p) {
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*p = 42;
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}
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void *Thread1(void *x) {
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foobar(&g_data);
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barrier_wait(&barrier);
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return NULL;
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}
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void *Thread2(void *x) {
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barrier_wait(&barrier);
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sleep(1); // let the thread finish and exit
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g_data = 43;
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return NULL;
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}
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int main() {
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barrier_init(&barrier, 2);
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pthread_t t[2];
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pthread_create(&t[0], NULL, Thread1, NULL);
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pthread_create(&t[1], NULL, Thread2, NULL);
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pthread_join(t[0], NULL);
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pthread_join(t[1], NULL);
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return 0;
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}
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK: Write of size 4 at {{.*}} by thread T2:
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// CHECK: Previous write of size 4 at {{.*}} by thread T1:
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// CHECK: #0 foobar
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// CHECK: #1 Thread1
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// CHECK: Thread T1 (tid={{.*}}, finished) created by main thread at:
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// CHECK: #0 pthread_create
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// CHECK: #1 main
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