forked from OSchip/llvm-project
41 lines
880 B
C++
41 lines
880 B
C++
#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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char *data = new char[10];
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char *data1 = new char[10];
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char *data2 = new char[10];
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void *Thread1(void *x) {
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memcpy(data+5, data1, 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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memcpy(data+3, data2, 4);
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return NULL;
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}
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int main() {
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fprintf(stderr, "addr=%p\n", &data[5]);
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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: addr=[[ADDR:0x[0-9,a-f]+]]
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK: Write of size 1 at [[ADDR]] by thread 2:
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// CHECK: #0 memcpy
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// CHECK: #1 Thread2
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// CHECK: Previous write of size 1 at [[ADDR]] by thread 1:
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// CHECK: #0 memcpy
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// CHECK: #1 Thread1
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