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> 6 extern "C" __declspec(dllexport) test_function()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