1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
// RUN: %clang_hwasan -O0 -DISREAD=1 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK
// RUN: %clang_hwasan -O1 -DISREAD=1 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK
// RUN: %clang_hwasan -O2 -DISREAD=1 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK
// RUN: %clang_hwasan -O3 -DISREAD=1 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK
// RUN: %clang_hwasan -O0 -DISREAD=0 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK
// REQUIRES: stable-runtime
#include <stdlib.h>
#include <stdio.h>
#include <sanitizer/hwasan_interface.h>
int main() {
__hwasan_enable_allocator_tagging();
char * volatile x = (char*)malloc(10);
free(x);
__hwasan_disable_allocator_tagging();
fprintf(stderr, ISREAD ? "Going to do a READ\n" : "Going to do a WRITE\n");
// CHECK: Going to do a [[TYPE:[A-Z]*]]
int r = 0;
if (ISREAD) r = x[5]; else x[5] = 42; // should be on the same line.
// CHECK: ERROR: HWAddressSanitizer: tag-mismatch on address {{.*}} at pc {{[0x]+}}[[PC:.*]]
// CHECK: [[TYPE]] of size 1 at {{.*}} tags: [[PTR_TAG:[0-9a-f][0-9a-f]]]/[[MEM_TAG:[0-9a-f][0-9a-f]]] (ptr/mem)
// CHECK: #{{[0-9]}} {{[0-9]+}}{{.*}}[[PC]]
// If we instrument using calls (default on x86), main is not the top frame
// of the fault.
// CHECK: in main {{.*}}use-after-free.c:[[@LINE-6]]
// Offset is 5 or 11 depending on left/right alignment.
// CHECK: is a small unallocated heap chunk; size: {{16|32}} offset: {{5|11}}
// CHECK: Cause: use-after-free
// CHECK: is located 5 bytes inside a 10-byte region
//
// CHECK: freed by thread {{.*}} here:
// CHECK: #0 {{.*}} in {{.*}}free{{.*}} {{.*}}hwasan_allocation_functions.cpp
// CHECK: #1 {{.*}} in main {{.*}}use-after-free.c:[[@LINE-19]]
// CHECK: previously allocated by thread {{.*}} here:
// CHECK: #0 {{.*}} in {{.*}}malloc{{.*}} {{.*}}hwasan_allocation_functions.cpp
// CHECK: #1 {{.*}} in main {{.*}}use-after-free.c:[[@LINE-24]]
// CHECK: Memory tags around the buggy address (one tag corresponds to 16 bytes):
// CHECK: =>{{.*}}[[MEM_TAG]]
// CHECK: SUMMARY: HWAddressSanitizer: tag-mismatch
return r;
}
|
