// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
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#include <stdio.h>
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// Defined by tsan.
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extern "C" void *__interceptor_malloc(unsigned long size);
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extern "C" void __interceptor_free(void *p);
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extern "C" void *malloc(unsigned long size) {
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static int first = 0;
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if (__sync_lock_test_and_set(&first, 1) == 0)
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fprintf(stderr, "user malloc\n");
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return __interceptor_malloc(size);
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}
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extern "C" void free(void *p) {
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__interceptor_free(p);
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}
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int main() {
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volatile char *p = (char*)malloc(10);
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p[0] = 0;
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free((void*)p);
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}
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// CHECK: user malloc
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// CHECK-NOT: ThreadSanitizer
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