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init_mozc.cc
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init_mozc.cc
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// Copyright 2010-2021, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "base/init_mozc.h"
#ifdef _WIN32
#include <windows.h>
#endif // _WIN32
#include <string>
#include "base/file_util.h"
#include "base/logging.h"
#ifndef MOZC_BUILDTOOL_BUILD
#include "base/system_util.h"
#endif // MOZC_BUILDTOOL_BUILD
#include "absl/flags/flag.h"
#include "absl/flags/parse.h"
// Even if log_dir is modified in the middle of the process, the
// logging directory will not be changed because the logging stream is
// initialized in the very early initialization stage.
ABSL_FLAG(std::string, log_dir, "",
"If specified, logfiles are written into this directory "
"instead of the default logging directory.");
ABSL_FLAG(std::string, program_invocation_name, "",
"Program name copied from argv[0].");
namespace mozc {
namespace {
#ifdef _WIN32
LONG CALLBACK ExitProcessExceptionFilter(EXCEPTION_POINTERS *ExceptionInfo) {
// Currently, we haven't found a good way to perform both
// "send mininump" and "exit the process gracefully".
::ExitProcess(static_cast<UINT>(-1));
return EXCEPTION_EXECUTE_HANDLER;
}
#endif // _WIN32
std::string GetLogFilePathFromProgramName(const std::string &program_name) {
const std::string basename = FileUtil::Basename(program_name) + ".log";
if (absl::GetFlag(FLAGS_log_dir).empty()) {
#ifdef MOZC_BUILDTOOL_BUILD
return basename;
#else // MOZC_BUILDTOOL_BUILD
return FileUtil::JoinPath(SystemUtil::GetLoggingDirectory(), basename);
#endif // MOZC_BUILDTOOL_BUILD
}
return FileUtil::JoinPath(absl::GetFlag(FLAGS_log_dir), basename);
}
void ParseCommandLineFlags(int argc, char **argv) {
absl::flags_internal::ParseCommandLineImpl(
argc, argv,
absl::flags_internal::ArgvListAction::kRemoveParsedArgs,
// Suppress help messages invoked by --help and others.
// Use UsageFlagsAction::kHandleUsage to enable it.
absl::flags_internal::UsageFlagsAction::kIgnoreUsage,
absl::flags_internal::OnUndefinedFlag::kIgnoreUndefined);
}
} // namespace
void InitMozc(const char *arg0, int *argc, char ***argv) {
absl::SetFlag(&FLAGS_program_invocation_name, *argv[0]);
#ifdef _WIN32
// InitMozc() is supposed to be used for code generator or
// other programs which are not included in the production code.
// In these code, we don't want to show any error messages when
// exceptions are raised. This is important to keep
// our continuous build stable.
::SetUnhandledExceptionFilter(ExitProcessExceptionFilter);
#endif // _WIN32
ParseCommandLineFlags(*argc, *argv);
const std::string program_name = *argc > 0 ? (*argv)[0] : "UNKNOWN";
Logging::InitLogStream(GetLogFilePathFromProgramName(program_name));
}
} // namespace mozc