forked from OSchip/llvm-project
44 lines
919 B
C
44 lines
919 B
C
// RUN: %clang_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
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#include <pthread.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <unistd.h>
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int *mem;
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pthread_mutex_t mtx;
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void *Thread1(void *x) {
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pthread_mutex_lock(&mtx);
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free(mem);
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pthread_mutex_unlock(&mtx);
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return NULL;
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}
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void *Thread2(void *x) {
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usleep(1000000);
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pthread_mutex_lock(&mtx);
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mem[0] = 42;
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pthread_mutex_unlock(&mtx);
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return NULL;
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}
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int main() {
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mem = (int*)malloc(100);
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pthread_mutex_init(&mtx, 0);
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pthread_t t;
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pthread_create(&t, NULL, Thread1, NULL);
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Thread2(0);
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pthread_join(t, NULL);
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pthread_mutex_destroy(&mtx);
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return 0;
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}
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// CHECK: WARNING: ThreadSanitizer: heap-use-after-free
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// CHECK: Write of size 4 at {{.*}} by main thread:
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// CHECK: #0 Thread2
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// CHECK: #1 main
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// CHECK: Previous write of size 8 at {{.*}} by thread 1:
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// CHECK: #0 free
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// CHECK: #1 Thread1
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