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// Copyright 2019 The gVisor Authors.
//
// 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.
#ifdef __linux__
#include <errno.h>
#include <sys/syscall.h>
#include <unistd.h>
#include "test/util/save_util.h"
#if defined(__x86_64__) || defined(__i386__)
#define SYS_TRIGGER_SAVE SYS_create_module
#elif defined(__aarch64__)
#define SYS_TRIGGER_SAVE SYS_finit_module
#else
#error "Unknown architecture"
#endif
namespace gvisor {
namespace testing {
void MaybeSave() {
if (internal::ShouldSave()) {
int orig_errno = errno;
// We use it to trigger saving the sentry state
// when this syscall is called.
// Notice: this needs to be a valid syscall
// that is not used in any of the syscall tests.
syscall(SYS_TRIGGER_SAVE, nullptr, 0);
errno = orig_errno;
}
}
} // namespace testing
} // namespace gvisor
#endif // __linux__
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