// 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