1 // RUN: %clang_cl_asan -Od %p/dll_host.cpp -Fe%t
2 // RUN: %clang_cl_asan -LD -Od %s -Fe%t.dll
3 // RUN: not %run %t %t.dll 2>&1 | FileCheck %s
4
5 // On windows 64-bit, the memchr function is written in assembly and is not
6 // hookable with the interception library. There is not enough padding before
7 // the function and there is a short jump on the second instruction which
8 // doesn't not allow enough space to encode a 64-bit indirect jump.
9 // UNSUPPORTED: x86_64-windows
10
11 #include <string.h>
12
13 extern "C" __declspec(dllexport)
test_function()14 int test_function() {
15 char buff[6] = "Hello";
16
17 memchr(buff, 'z', 7);
18 // CHECK: AddressSanitizer: stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
19 // CHECK: READ of size 7 at [[ADDR]] thread T0
20 // CHECK-NEXT: __asan_wrap_memchr
21 // CHECK-NEXT: memchr
22 // CHECK-NEXT: test_function {{.*}}dll_intercept_memchr.cpp:[[@LINE-5]]
23 // CHECK: Address [[ADDR]] is located in stack of thread T0 at offset {{.*}} in frame
24 // CHECK-NEXT: test_function {{.*}}dll_intercept_memchr.cpp
25 // CHECK: 'buff'{{.*}} <== Memory access at offset {{.*}} overflows this variable
26 return 0;
27 }
28