| 1 | // RUN: %clang_cl_asan %Od %s %Fe%t |
|---|
| 2 | // RUN: not %run %t 2>&1 | FileCheck %s |
|---|
| 3 | |
|---|
| 4 | #include <windows.h> |
|---|
| 5 | |
|---|
| 6 | typedef struct _S { |
|---|
| 7 | unsigned int bf1:1; |
|---|
| 8 | unsigned int bf2:2; |
|---|
| 9 | unsigned int bf3:3; |
|---|
| 10 | unsigned int bf4:4; |
|---|
| 11 | } S; |
|---|
| 12 | |
|---|
| 13 | void make_access(S *s) { |
|---|
| 14 | s->bf2 = 2; |
|---|
| 15 | // CHECK: AddressSanitizer: heap-use-after-free on address [[ADDR:0x[0-9a-f]+]] |
|---|
| 16 | // CHECK: READ of size {{[124]}} at [[ADDR]] |
|---|
| 17 | // CHECK: {{#0 .* make_access.*bitfield_uaf.cpp}}:[[@LINE-3]] |
|---|
| 18 | // CHECK: {{#1 .* main}} |
|---|
| 19 | } |
|---|
| 20 | |
|---|
| 21 | int main(void) { |
|---|
| 22 | S *s = (S*)malloc(sizeof(S)); |
|---|
| 23 | free(s); |
|---|
| 24 | // CHECK: [[ADDR]] is located 0 bytes inside of 4-byte region |
|---|
| 25 | // CHECK-LABEL: freed by thread T0 here: |
|---|
| 26 | // CHECK: {{#0 .* free }} |
|---|
| 27 | // CHECK: {{ #[1-2] .* main .*bitfield_uaf.cpp}}:[[@LINE-4]] |
|---|
| 28 | // CHECK-LABEL: previously allocated by thread T0 here: |
|---|
| 29 | // CHECK: {{#0 .* malloc }} |
|---|
| 30 | // CHECK: {{ #[1-2] .* main .*bitfield_uaf.cpp}}:[[@LINE-8]] |
|---|
| 31 | make_access(s); |
|---|
| 32 | return 0; |
|---|
| 33 | } |
|---|
| 34 | |
|---|
| 35 | |
|---|
