| 1 | // Check that free hook doesn't conflict with Realloc. |
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| 2 | // RUN: %clangxx_asan -O2 %s -o %t |
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| 3 | // RUN: %run %t 2>&1 | FileCheck %s |
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| 4 | |
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| 5 | #include <stdlib.h> |
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| 6 | #include <unistd.h> |
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| 7 | #include <sanitizer/allocator_interface.h> |
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| 8 | |
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| 9 | static void *glob_ptr; |
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| 10 | |
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| 11 | // Required for dyld macOS 12.0+ |
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| 12 | #if (__APPLE__) |
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| 13 | __attribute__((weak)) |
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| 14 | #endif |
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| 15 | extern "C" void |
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| 16 | __sanitizer_free_hook(const volatile void *ptr) { |
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| 17 | if (ptr == glob_ptr) { |
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| 18 | *(int*)ptr = 0; |
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| 19 | write(fd: 1, buf: "FreeHook\n" , n: sizeof("FreeHook\n" )); |
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| 20 | } |
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| 21 | } |
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| 22 | |
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| 23 | int main() { |
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| 24 | int *x = (int*)malloc(size: 100); |
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| 25 | x[0] = 42; |
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| 26 | glob_ptr = x; |
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| 27 | int *y = (int*)realloc(ptr: x, size: 200); |
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| 28 | // Verify that free hook was called and didn't spoil the memory. |
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| 29 | if (y[0] != 42) { |
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| 30 | _exit(status: 1); |
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| 31 | } |
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| 32 | write(fd: 1, buf: "Passed\n" , n: sizeof("Passed\n" )); |
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| 33 | free(ptr: y); |
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| 34 | // CHECK: FreeHook |
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| 35 | // CHECK: Passed |
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| 36 | return 0; |
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| 37 | } |
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| 38 | |
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