xref: /llvm-project/compiler-rt/test/asan/TestCases/Windows/bitfield_uaf.cpp (revision b91b8fea8c58e9b414e291df677b12ca44197784)
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 
make_access(S * s)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 
main(void)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:   {{ #[1-3] .* 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