35 lines · cpp
1// RUN: %clang_cl_asan %Od %s %Fe%t2// RUN: not %run %t 2>&1 | FileCheck %s3 4#include <windows.h>5 6typedef 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 13void 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 21int main(void) {22 S *s = (S*)malloc(sizeof(S));23 free(s);24 // CHECK: [[ADDR]] is located 0 bytes inside of 4-byte region25 // CHECK-LABEL: freed by thread T0 here:26 // CHECK: {{#0 .* free }}27 // CHECK: {{ #[1-3] .* main .*bitfield_uaf.cpp}}:[[@LINE-4]]28 // CHECK-LABEL: previously allocated by thread T0 here:29 // CHECK: {{#0 .* malloc }}30 // CHECK: {{ #[1-3] .* main .*bitfield_uaf.cpp}}:[[@LINE-8]]31 make_access(s);32 return 0;33}34 35