1// RUN: %clang_cl_asan -O0 %p/dll_host.cc -Fe%t 2// RUN: %clang_cl_asan -LD -O0 %s -Fe%t.dll 3// RUN: not %run %t %t.dll 2>&1 | FileCheck %s 4 5#include <malloc.h> 6extern "C" __declspec(dllexport) 7int 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.cc:[[@LINE-3]] 13// CHECK-NEXT: main {{.*}}dll_host.cc 14// 15// CHECK: [[ADDR]] is located 1 bytes to the left of 42-byte region 16// CHECK-LABEL: allocated by thread T0 here: 17// CHECK-NEXT: malloc 18// CHECK-NEXT: test_function {{.*}}dll_malloc_left_oob.cc:[[@LINE-10]] 19// CHECK-NEXT: main {{.*}}dll_host.cc 20// CHECK-LABEL: SUMMARY 21 free(buffer); 22 return 0; 23} 24