test/asan/TestCases/Windows/dll_poison_unpoison.cc

   1 // RUN: %clangxx_asan -O0 %p/dll_host.cc -Fe%t
   2 // RUN: %clangxx_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
   7 void should_not_crash(volatile char *c) {
   8   *c = 42;
   9 }
  10
  11 void should_crash(volatile char *c) {
  12   *c = 42;
  13 }
  14
  15 extern "C" __declspec(dllexport)
  16 int 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 }