compiler-rt/test/asan/TestCases/Windows/dll_intercept_memchr.cpp

   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:  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 }