forked from OSchip/llvm-project
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
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// RUN: %clang_tsan -O1 %s -o %t
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// RUN: not %t 2>&1 | FileCheck %s --check-prefix=CHECK-NOZUPP
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// RUN: TSAN_OPTIONS="suppressions=%s.supp print_suppressions=1" %t 2>&1 | FileCheck %s --check-prefix=CHECK-SUPP
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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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sleep(1);
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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-NOZUPP: WARNING: ThreadSanitizer: heap-use-after-free
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// CHECK-NOZUPP: Write of size 4 at {{.*}} by main thread{{.*}}:
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// CHECK-NOZUPP: #0 Thread2
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// CHECK-NOZUPP: #1 main
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// CHECK-NOZUPP: Previous write of size 8 at {{.*}} by thread T1{{.*}}:
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// CHECK-NOZUPP: #0 free
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// CHECK-NOZUPP: #{{(1|2)}} Thread1
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// CHECK-NOZUPP: SUMMARY: ThreadSanitizer: heap-use-after-free{{.*}}Thread2
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// CHECK-SUPP: ThreadSanitizer: Matched 1 suppressions
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// CHECK-SUPP: 1 race:^Thread2$
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