blob: fadfc09cf111734a3c3315eaf49bb58f9e61def2 [file] [log] [blame]
/*
* Copyright (C) 2011 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.
*/
#include <signal.h>
#include <sys/mman.h>
#include "thread.h"
namespace art {
void Thread::SetUpAlternateSignalStack() {
// Bionic does this for us.
}
void Thread::TearDownAlternateSignalStack() {
// Bionic does this for us.
}
void Thread::MadviseAwayAlternateSignalStack() {
stack_t old_ss;
int result = sigaltstack(nullptr, &old_ss);
CHECK_EQ(result, 0);
result = madvise(old_ss.ss_sp, old_ss.ss_size, MADV_FREE);
CHECK_EQ(result, 0);
}
} // namespace art