forked from OSchip/llvm-project
37 lines
860 B
C++
37 lines
860 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 <unistd.h>
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void *Thread1(void *x) {
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int *p = (int*)x;
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p[0] = 1;
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return NULL;
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}
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void *Thread2(void *x) {
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usleep(500*1000);
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char *p = (char*)x;
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p[2] = 1;
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return NULL;
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}
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int main() {
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int *data = new int(42);
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fprintf(stderr, "ptr1=%p\n", data);
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fprintf(stderr, "ptr2=%p\n", (char*)data + 2);
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pthread_t t[2];
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pthread_create(&t[0], NULL, Thread1, data);
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pthread_create(&t[1], NULL, Thread2, data);
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pthread_join(t[0], NULL);
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pthread_join(t[1], NULL);
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delete data;
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}
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// CHECK: ptr1=[[PTR1:0x[0-9,a-f]+]]
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// CHECK: ptr2=[[PTR2:0x[0-9,a-f]+]]
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK: Write of size 1 at [[PTR2]] by thread 2:
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// CHECK: Previous write of size 4 at [[PTR1]] by thread 1:
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