platform_bionic/tests/stack_protector_test_helper.cpp
Elliott Hughes fc69a8ad5f Improve and fix the stack-protector tests.
Bug: http://b/26888853
Change-Id: I505dbf7d5934f7247fb639f55dd6a9341df3947b
2016-03-09 14:50:03 -08:00

24 lines
958 B
C++

/*
* 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() {
char buf[128];
// We can't use memset here because it's fortified, and we want to test
// the line of defense *after* that.
char* p = buf;
while ((p - buf) < static_cast<int>(sizeof(buf) + sizeof(void*))) *p++ = '\0';
}