A common init function for binaries and a default main function for tests

[folly.git] / folly / init / Init.cpp

diff --git a/folly/init/Init.cpp b/folly/init/Init.cpp
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+/*
+ * Copyright 2016 Facebook, Inc.
+ *
+ * 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 <folly/init/Init.h>
+#include <folly/Singleton.h>
+#include <folly/experimental/symbolizer/SignalHandler.h>
+
+#include <glog/logging.h>
+#include <gflags/gflags.h>
+
+namespace folly {
+
+void init(int* argc, char*** argv, bool removeFlags) {
+  // Install the handler now, to trap errors received during startup.
+  // The callbacks, if any, can be installed later
+  folly::symbolizer::installFatalSignalHandler();
+
+  google::ParseCommandLineFlags(argc, argv, removeFlags);
+
+  auto programName = argc && argv && *argc > 0 ? (*argv)[0] : "unknown";
+  google::InitGoogleLogging(programName);
+
+  // Don't use glog's DumpStackTraceAndExit; rely on our signal handler.
+  google::InstallFailureFunction(abort);
+
+  // Move from the registration phase to the "you can actually instantiate
+  // things now" phase.
+  folly::SingletonVault::singleton()->registrationComplete();
+
+  // Actually install the callbacks into the handler.
+  folly::symbolizer::installFatalSignalCallbacks();
+}
+} //!folly