62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
// Copyright 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "sandboxed_api/sandbox2/logsink.h"
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#include <unistd.h>
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#include <csignal>
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#include <cstdio>
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#include <string>
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#include "absl/base/log_severity.h"
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#include "absl/log/log_entry.h"
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#include "absl/log/log_sink_registry.h"
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#include "absl/strings/str_cat.h"
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#include "absl/strings/str_format.h"
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#include "absl/synchronization/mutex.h"
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#include "sandboxed_api/sandbox2/logserver.pb.h"
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namespace sandbox2 {
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constexpr char LogSink::kLogFDName[];
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LogSink::LogSink(int fd) : comms_(fd) { absl::AddLogSink(this); }
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LogSink::~LogSink() { absl::RemoveLogSink(this); }
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void LogSink::Send(const absl::LogEntry& e) {
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absl::MutexLock l(&lock_);
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LogMessage msg;
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msg.set_severity(static_cast<int>(e.log_severity()));
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msg.set_path(std::string(e.source_basename()));
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msg.set_line(e.source_line());
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msg.set_message(absl::StrCat(e.text_message(), "\n"));
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msg.set_pid(getpid());
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if (!comms_.SendProtoBuf(msg)) {
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absl::FPrintF(stderr, "sending log message to supervisor failed:\n%s\n",
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e.text_message_with_prefix());
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}
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if (e.log_severity() == absl::LogSeverity::kFatal) {
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// Raise a SIGABRT to prevent the remaining code in logging to try to dump a
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// symbolized stack trace which can lead to syscall violations.
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kill(0, SIGABRT);
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}
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}
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} // namespace sandbox2
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