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 <sanitizer/asan_interface.h> 6 should_not_crash(volatile char * c)7void should_not_crash(volatile char *c) { 8 *c = 42; 9 } 10 should_crash(volatile char * c)11void should_crash(volatile char *c) { 12 *c = 42; 13 } 14 15 extern "C" __declspec(dllexport) test_function()16int test_function() { 17 char buffer[256]; 18 should_not_crash(&buffer[0]); 19 __asan_poison_memory_region(buffer, 128); 20 should_not_crash(&buffer[192]); 21 __asan_unpoison_memory_region(buffer, 64); 22 should_not_crash(&buffer[32]); 23 24 should_crash(&buffer[96]); 25 // CHECK: AddressSanitizer: use-after-poison on address [[ADDR:0x[0-9a-f]+]] 26 // CHECK-NEXT: WRITE of size 1 at [[ADDR]] thread T0 27 // CHECK-NEXT: should_crash{{.*}}\dll_poison_unpoison.cc 28 // CHECK-NEXT: test_function{{.*}}\dll_poison_unpoison.cc:[[@LINE-4]] 29 // CHECK-NEXT: main 30 // 31 // CHECK: [[ADDR]] is located in stack of thread T0 at offset [[OFFSET:.*]] in frame 32 // CHECK-NEXT: test_function{{.*}}\dll_poison_unpoison.cc 33 // CHECK: 'buffer' <== Memory access at offset [[OFFSET]] is inside this variable 34 return 0; 35 } 36