test/asan/TestCases/Windows/dll_stack_use_after_return.cc


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// RUN: %clang_cl_asan -O0 %p/dll_host.cc -Fe%t
// RUN: %clang_cl_asan -LD -O0 %s -Fe%t.dll
// RUN: env ASAN_OPTIONS=detect_stack_use_after_return=1 not %run %t %t.dll 2>&1 | FileCheck %s

#include <malloc.h>

char *x;

void foo() {
  char stack_buffer[42];
  x = &stack_buffer[13];
}

extern "C" __declspec(dllexport)
int test_function() {
  foo();
  *x = 42;
// CHECK: AddressSanitizer: stack-use-after-return
// CHECK: WRITE of size 1 at [[ADDR:.*]] thread T0
// CHECK-NEXT:  test_function {{.*}}dll_stack_use_after_return.cc:[[@LINE-3]]
// CHECK-NEXT:  main
//
// CHECK: Address [[ADDR]] is located in stack of thread T0 at offset [[OFFSET:.*]] in frame
// CHECK-NEXT: #0 {{.*}} foo {{.*}}dll_stack_use_after_return.cc
// CHECK: 'stack_buffer' <== Memory access at offset [[OFFSET]] is inside this variable
  return 0;
}