platform_bionic/tests/stack_protector_test_helper.cpp

26 lines
1,004 B
C++
Raw Normal View History

/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Deliberately overwrite the stack canary.
__attribute__((noinline)) void modify_stack_protector_test() {
// We can't use memset here because it's fortified, and we want to test
// the line of defense *after* that.
// Without volatile, the generic x86/x86-64 targets don't write to the stack.
volatile char* p;
p = reinterpret_cast<volatile char*>(&p + 1);
*p = '\0';
}