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