test/asan/TestCases/Windows/dll_intercept_memcpy.cc

   1 // RUN: %clangxx_asan -O0 %p/dll_host.cc -Fe%t
   2 // RUN: %clangxx_asan -LD -O0 %s -Fe%t.dll
   3 // FIXME: 'cat' is needed due to PR19744.
   4 // RUN: not %run %t %t.dll 2>&1 | cat | FileCheck %s
   5
   6 #include <stdio.h>
   7 #include <string.h>
   8
   9 void call_memcpy(void* (*f)(void *, const void *, size_t),
  10                  void *a, const void *b, size_t c) {
  11   f(a, b, c);
  12 }
  13
  14 extern "C" __declspec(dllexport)
  15 int test_function() {
  16   char buff1[6] = "Hello", buff2[5];
  17
  18   call_memcpy(&memcpy, buff2, buff1, 5);
  19   if (buff1[2] != buff2[2])
  20     return 2;
  21   printf("Initial test OK\n");
  22   fflush(0);
  23 // CHECK: Initial test OK
  24
  25   call_memcpy(&memcpy, buff2, buff1, 6);
  26 // CHECK: AddressSanitizer: stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
  27 // CHECK: WRITE of size 6 at [[ADDR]] thread T0
  28 // CHECK-NEXT:  __asan_memcpy
  29 // CHECK-NEXT:  call_memcpy
  30 // CHECK-NEXT:  test_function {{.*}}dll_intercept_memcpy.cc:[[@LINE-5]]
  31 // CHECK: Address [[ADDR]] is located in stack of thread T0 at offset {{.*}} in frame
  32 // CHECK-NEXT:  test_function {{.*}}dll_intercept_memcpy.cc
  33 // CHECK: 'buff2' <== Memory access at offset {{.*}} overflows this variable
  34 }