forked from OSchip/llvm-project
44 lines
937 B
C++
44 lines
937 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
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#include <pthread.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.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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return NULL;
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}
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void *Thread2(void *x) {
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usleep(1000*1000);
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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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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 2:
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// CHECK: Previous write of size 4 at {{.*}} by thread 1:
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// CHECK: #0 foobar
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// CHECK: #1 Thread1
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// CHECK: Thread 1 (finished) created at:
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// CHECK: #0 pthread_create
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// CHECK: #1 main
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