File: dll_malloc_left_oob.cpp

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// RUN: %clang_cl_asan %Od %p/dll_host.cpp %Fe%t
// RUN: %clang_cl_asan %LD %Od %s %Fe%t.dll
// RUN: not %run %t %t.dll 2>&1 | FileCheck %s

#include <malloc.h>
extern "C" __declspec(dllexport)
int test_function() {
  char *buffer = (char*)malloc(42);
  buffer[-1] = 42;
  // CHECK: AddressSanitizer: heap-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
  // CHECK: WRITE of size 1 at [[ADDR]] thread T0
  // CHECK-NEXT: test_function {{.*}}dll_malloc_left_oob.cpp:[[@LINE-3]]
  // CHECK-NEXT: main {{.*}}dll_host.cpp
  //
  // CHECK: [[ADDR]] is located 1 bytes before 42-byte region
  // CHECK-LABEL: allocated by thread T0 here:
  // CHECK-NEXT:   malloc
  // CHECK:   test_function {{.*}}dll_malloc_left_oob.cpp:[[@LINE-10]]
  // CHECK-NEXT:   main {{.*}}dll_host.cpp
  // CHECK-LABEL: SUMMARY
  free(buffer);
  return 0;
}