1 // Check that MemProf correctly handles malloc and free hooks.
2 // RUN: %clangxx_memprof -O2 %s -o %t && %run %t 2>&1 | FileCheck %s
3
4 #include <sanitizer/allocator_interface.h>
5 #include <stdlib.h>
6 #include <unistd.h>
7
8 extern "C" {
9 const volatile void *global_ptr;
10
11 #define WRITE(s) write(1, s, sizeof(s))
12
13 // Note: avoid calling functions that allocate memory in malloc/free
14 // to avoid infinite recursion.
__sanitizer_malloc_hook(const volatile void * ptr,size_t sz)15 void __sanitizer_malloc_hook(const volatile void *ptr, size_t sz) {
16 if (__sanitizer_get_ownership(ptr) && sz == 4) {
17 WRITE("MallocHook\n");
18 global_ptr = ptr;
19 }
20 }
__sanitizer_free_hook(const volatile void * ptr)21 void __sanitizer_free_hook(const volatile void *ptr) {
22 if (__sanitizer_get_ownership(ptr) && ptr == global_ptr)
23 WRITE("FreeHook\n");
24 }
25 } // extern "C"
26
27 volatile int *x;
28
MallocHook1(const volatile void * ptr,size_t sz)29 void MallocHook1(const volatile void *ptr, size_t sz) { WRITE("MH1\n"); }
MallocHook2(const volatile void * ptr,size_t sz)30 void MallocHook2(const volatile void *ptr, size_t sz) { WRITE("MH2\n"); }
FreeHook1(const volatile void * ptr)31 void FreeHook1(const volatile void *ptr) { WRITE("FH1\n"); }
FreeHook2(const volatile void * ptr)32 void FreeHook2(const volatile void *ptr) { WRITE("FH2\n"); }
33 // Call this function with uninitialized arguments to poison
34 // TLS shadow for function parameters before calling operator
35 // new and, eventually, user-provided hook.
allocate(int * unused1,int * unused2)36 __attribute__((noinline)) void allocate(int *unused1, int *unused2) {
37 x = new int;
38 }
39
main()40 int main() {
41 __sanitizer_install_malloc_and_free_hooks(MallocHook1, FreeHook1);
42 __sanitizer_install_malloc_and_free_hooks(MallocHook2, FreeHook2);
43 int *undef1, *undef2;
44 allocate(undef1, undef2);
45 // CHECK: MallocHook
46 // CHECK: MH1
47 // CHECK: MH2
48 // Check that malloc hook was called with correct argument.
49 if (global_ptr != (void *)x) {
50 _exit(1);
51 }
52 *x = 0;
53 delete x;
54 // CHECK: FreeHook
55 // CHECK: FH1
56 // CHECK: FH2
57 return 0;
58 }
59