1 // Check that the stack trace debugging API works and returns correct
2 // malloc and free stacks.
3 // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
4
5 // FIXME: Figure out why allocation/free stack traces may be too short on ARM.
6 // REQUIRES: stable-runtime
7
8 #include <sanitizer/asan_interface.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11
12 char *mem;
func1()13 void func1() {
14 mem = (char *)malloc(10);
15 }
16
func2()17 void func2() {
18 free(mem);
19 }
20
main()21 int main() {
22 // Disable stderr buffering. Needed on Windows.
23 setvbuf(stderr, NULL, _IONBF, 0);
24
25 func1();
26 func2();
27
28 void *trace[100];
29 size_t num_frames = 100;
30 int thread_id;
31 num_frames = __asan_get_alloc_stack(mem, trace, num_frames, &thread_id);
32
33 fprintf(stderr, "alloc stack retval %s\n", (num_frames > 0 && num_frames < 10)
34 ? "ok" : "");
35 // CHECK: alloc stack retval ok
36 fprintf(stderr, "thread id = %d\n", thread_id);
37 // CHECK: thread id = 0
38 fprintf(stderr, "0x%lx\n", trace[0]);
39 // CHECK: [[ALLOC_FRAME_0:0x[0-9a-f]+]]
40 fprintf(stderr, "0x%lx\n", trace[1]);
41 // CHECK: [[ALLOC_FRAME_1:0x[0-9a-f]+]]
42
43 num_frames = 100;
44 num_frames = __asan_get_free_stack(mem, trace, num_frames, &thread_id);
45
46 fprintf(stderr, "free stack retval %s\n", (num_frames > 0 && num_frames < 10)
47 ? "ok" : "");
48 // CHECK: free stack retval ok
49 fprintf(stderr, "thread id = %d\n", thread_id);
50 // CHECK: thread id = 0
51 fprintf(stderr, "0x%lx\n", trace[0]);
52 // CHECK: [[FREE_FRAME_0:0x[0-9a-f]+]]
53 fprintf(stderr, "0x%lx\n", trace[1]);
54 // CHECK: [[FREE_FRAME_1:0x[0-9a-f]+]]
55
56 mem[0] = 'A'; // BOOM
57
58 // CHECK: ERROR: AddressSanitizer: heap-use-after-free
59 // CHECK: WRITE of size 1 at 0x{{.*}}
60 // CHECK: freed by thread T0 here:
61 // CHECK: #0 [[FREE_FRAME_0]]
62 // CHECK: #1 [[FREE_FRAME_1]]
63 // CHECK: previously allocated by thread T0 here:
64 // CHECK: #0 [[ALLOC_FRAME_0]]
65 // CHECK: #1 [[ALLOC_FRAME_1]]
66
67 return 0;
68 }
69