1 // RUN: %clangxx_msan -O2 %s -o %t 2 // RUN: %t 2>&1 | FileCheck %s 3 #include <stdlib.h> 4 #include <unistd.h> 5 6 extern "C" { 7 bool __msan_get_ownership(const void *p); 8 9 void *global_ptr; 10 11 // Note: avoid calling functions that allocate memory in malloc/free 12 // to avoid infinite recursion. __msan_malloc_hook(void * ptr,size_t sz)13void __msan_malloc_hook(void *ptr, size_t sz) { 14 if (__msan_get_ownership(ptr)) { 15 write(1, "MallocHook\n", sizeof("MallocHook\n")); 16 global_ptr = ptr; 17 } 18 } __msan_free_hook(void * ptr)19void __msan_free_hook(void *ptr) { 20 if (__msan_get_ownership(ptr) && ptr == global_ptr) 21 write(1, "FreeHook\n", sizeof("FreeHook\n")); 22 } 23 } // extern "C" 24 main()25int main() { 26 volatile int *x = new int; 27 // CHECK: MallocHook 28 // Check that malloc hook was called with correct argument. 29 if (global_ptr != (void*)x) { 30 _exit(1); 31 } 32 *x = 0; 33 delete x; 34 // CHECK: FreeHook 35 return 0; 36 } 37