| 1 | // RUN: %clangxx_tsan -c -O1 -fno-sanitize=thread %s -o %t.o |
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| 2 | // RUN: %clangxx_tsan -O1 %s %t.o -o %t && %run %t 2>&1 | FileCheck %s |
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| 3 | |
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| 4 | #include <stdio.h> |
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| 5 | #include <stdlib.h> |
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| 6 | |
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| 7 | #if !__has_feature(thread_sanitizer) |
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| 8 | |
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| 9 | // Defined by tsan. |
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| 10 | extern "C" void *__interceptor_malloc(unsigned long size); |
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| 11 | extern "C" void __interceptor_free(void *p); |
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| 12 | extern "C" void *malloc(unsigned long size) { |
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| 13 | static int first = 0; |
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| 14 | if (__sync_lock_test_and_set(&first, 1) == 0) |
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| 15 | fprintf(stderr, format: "user malloc\n" ); |
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| 16 | return __interceptor_malloc(size); |
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| 17 | } |
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| 18 | |
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| 19 | extern "C" void free(void *p) { |
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| 20 | __interceptor_free(p); |
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| 21 | } |
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| 22 | |
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| 23 | #else |
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| 24 | |
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| 25 | int main() { |
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| 26 | volatile char *p = (char*)malloc(10); |
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| 27 | p[0] = 0; |
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| 28 | free((void*)p); |
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| 29 | } |
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| 30 | |
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| 31 | #endif |
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| 32 | |
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| 33 | // CHECK: user malloc |
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| 34 | // CHECK-NOT: ThreadSanitizer |
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| 35 | |
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| 36 | |
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