compiler-rt/test/asan/TestCases/Windows/dll_malloc_left_oob.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 #include <malloc.h>
   6 extern "C" __declspec(dllexport)
   7 int test_function() {
   8   char *buffer = (char*)malloc(42);
   9   buffer[-1] = 42;
  10   // CHECK: AddressSanitizer: heap-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
  11   // CHECK: WRITE of size 1 at [[ADDR]] thread T0
  12   // CHECK-NEXT: test_function {{.*}}dll_malloc_left_oob.cpp:[[@LINE-3]]
  13   // CHECK-NEXT: main {{.*}}dll_host.cpp
  14   //
  15   // CHECK: [[ADDR]] is located 1 bytes before 42-byte region
  16   // CHECK-LABEL: allocated by thread T0 here:
  17   // CHECK-NEXT:   malloc
  18   // CHECK:   test_function {{.*}}dll_malloc_left_oob.cpp:[[@LINE-10]]
  19   // CHECK-NEXT:   main {{.*}}dll_host.cpp
  20   // CHECK-LABEL: SUMMARY
  21   free(buffer);
  22   return 0;
  23 }