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) 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