sandboxed-api/sandboxed_api/sandbox2/sandbox2.cc
Wiktor Garbacz 10d44614fd Partial support for sandbox2::Notify in UnotifyMonitor
PiperOrigin-RevId: 515562555
Change-Id: Ie73c34bc7e35942b307c458cfef80510e0b734c3
2023-03-10 00:59:37 -08:00

151 lines
4.5 KiB
C++

// Copyright 2019 Google LLC
//
// 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
//
// https://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.
// Implementation file for the sandbox2::Sandbox class.
#include "sandboxed_api/sandbox2/sandbox2.h"
#include <csignal>
#include <memory>
#include <string>
#include <vector>
#include "absl/base/call_once.h"
#include "absl/log/check.h"
#include "absl/status/status.h"
#include "absl/status/statusor.h"
#include "absl/time/time.h"
#include "sandboxed_api/sandbox2/monitor_base.h"
#include "sandboxed_api/sandbox2/monitor_ptrace.h"
#include "sandboxed_api/sandbox2/monitor_unotify.h"
#include "sandboxed_api/sandbox2/result.h"
#include "sandboxed_api/sandbox2/stack_trace.h"
namespace sandbox2 {
namespace {
class Sandbox2Peer : public internal::SandboxPeer {
public:
static std::unique_ptr<SandboxPeer> Spawn(std::unique_ptr<Executor> executor,
std::unique_ptr<Policy> policy) {
return std::make_unique<Sandbox2Peer>(std::move(executor),
std::move(policy));
}
Sandbox2Peer(std::unique_ptr<Executor> executor,
std::unique_ptr<Policy> policy)
: sandbox_(std::move(executor), std::move(policy)) {
sandbox_.RunAsync();
}
Comms* comms() override { return sandbox_.comms(); }
void Kill() override { sandbox_.Kill(); }
Result AwaitResult() override { return sandbox_.AwaitResult(); }
private:
Sandbox2 sandbox_;
};
} // namespace
absl::StatusOr<Result> Sandbox2::AwaitResultWithTimeout(
absl::Duration timeout) {
CHECK(monitor_ != nullptr) << "Sandbox was not launched yet";
return monitor_->AwaitResultWithTimeout(timeout);
}
Result Sandbox2::AwaitResult() {
return AwaitResultWithTimeout(absl::InfiniteDuration()).value();
}
bool Sandbox2::RunAsync() {
Launch();
// If the sandboxee setup failed we return 'false' here.
if (monitor_->IsDone() &&
monitor_->result().final_status() == Result::SETUP_ERROR) {
return false;
}
return true;
}
void Sandbox2::Kill() {
CHECK(monitor_ != nullptr) << "Sandbox was not launched yet";
monitor_->Kill();
}
void Sandbox2::DumpStackTrace() {
CHECK(monitor_ != nullptr) << "Sandbox was not launched yet";
monitor_->DumpStackTrace();
}
bool Sandbox2::IsTerminated() const {
CHECK(monitor_ != nullptr) << "Sandbox was not launched yet";
return monitor_->IsDone();
}
void Sandbox2::set_walltime_limit(absl::Duration limit) const {
CHECK(monitor_ != nullptr) << "Sandbox was not launched yet";
monitor_->SetWallTimeLimit(limit);
}
void Sandbox2::Launch() {
static absl::once_flag init_sandbox_peer_flag;
absl::call_once(init_sandbox_peer_flag, []() {
internal::SandboxPeer::spawn_fn_ = Sandbox2Peer::Spawn;
});
monitor_ = CreateMonitor();
monitor_->Launch();
}
absl::Status Sandbox2::EnableUnotifyMonitor() {
if (notify_) {
LOG(WARNING) << "Running UnotifyMonitor with sandbox2::Notify is not fully "
"supported. Runtime syscall decisions via "
"EventSyscallTrap/EventSyscallTrace, notifications about "
"signals via EventSignal will not work";
}
if (policy_->GetNamespace() == nullptr) {
return absl::FailedPreconditionError(
"Unotify monitor can only be used together with namespaces");
}
if (policy_->collect_stacktrace_on_signal_) {
return absl::FailedPreconditionError(
"Unotify monitor cannot collect stack traces on signal");
}
if (policy_->collect_stacktrace_on_exit_) {
return absl::FailedPreconditionError(
"Unotify monitor cannot collect stack traces on normal exit");
}
use_unotify_monitor_ = true;
return absl::OkStatus();
}
std::unique_ptr<MonitorBase> Sandbox2::CreateMonitor() {
if (!notify_) {
notify_ = std::make_unique<Notify>();
}
if (use_unotify_monitor_) {
return std::make_unique<UnotifyMonitor>(executor_.get(), policy_.get(),
notify_.get());
}
return std::make_unique<PtraceMonitor>(executor_.get(), policy_.get(),
notify_.get());
}
} // namespace sandbox2