/
node_main.cc
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/
node_main.cc
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// Copyright (c) 2015 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "shell/app/node_main.h"
#include <memory>
#include <string>
#include <unordered_set>
#include <utility>
#include <vector>
#include "base/command_line.h"
#include "base/feature_list.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/thread_pool/thread_pool_instance.h"
#include "base/threading/thread_task_runner_handle.h"
#include "electron/electron_version.h"
#include "gin/array_buffer.h"
#include "gin/public/isolate_holder.h"
#include "gin/v8_initializer.h"
#include "shell/app/uv_task_runner.h"
#include "shell/browser/javascript_environment.h"
#include "shell/browser/node_debugger.h"
#include "shell/common/api/electron_bindings.h"
#include "shell/common/crash_reporter/crash_reporter.h"
#include "shell/common/gin_helper/dictionary.h"
#include "shell/common/node_bindings.h"
#include "shell/common/node_includes.h"
#if defined(_WIN64)
#include "shell/common/crash_reporter/crash_reporter_win.h"
#endif
namespace {
// Initialize Node.js cli options to pass to Node.js
// See https://nodejs.org/api/cli.html#cli_options
void SetNodeCliFlags() {
// Options that are unilaterally disallowed
const std::unordered_set<base::StringPiece, base::StringPieceHash>
disallowed = {"--openssl-config", "--use-bundled-ca", "--use-openssl-ca",
"--force-fips", "--enable-fips"};
const auto argv = base::CommandLine::ForCurrentProcess()->argv();
std::vector<std::string> args;
// TODO(codebytere): We need to set the first entry in args to the
// process name owing to src/node_options-inl.h#L286-L290 but this is
// redundant and so should be refactored upstream.
args.reserve(argv.size() + 1);
args.emplace_back("electron");
for (const auto& arg : argv) {
#if defined(OS_WIN)
const auto& option = base::UTF16ToUTF8(arg);
#else
const auto& option = arg;
#endif
const auto stripped = base::StringPiece(option).substr(0, option.find('='));
if (disallowed.count(stripped) != 0) {
LOG(ERROR) << "The Node.js cli flag " << stripped
<< " is not supported in Electron";
} else {
args.push_back(option);
}
}
std::vector<std::string> errors;
// Node.js itself will output parsing errors to
// console so we don't need to handle that ourselves
ProcessGlobalArgs(&args, nullptr, &errors, node::kDisallowedInEnvironment);
}
} // namespace
namespace electron {
#if !defined(OS_LINUX)
void AddExtraParameter(const std::string& key, const std::string& value) {
crash_reporter::CrashReporter::GetInstance()->AddExtraParameter(key, value);
}
void RemoveExtraParameter(const std::string& key) {
crash_reporter::CrashReporter::GetInstance()->RemoveExtraParameter(key);
}
#endif
int NodeMain(int argc, char* argv[]) {
base::CommandLine::Init(argc, argv);
int exit_code = 1;
{
// Feed gin::PerIsolateData with a task runner.
argv = uv_setup_args(argc, argv);
uv_loop_t* loop = uv_default_loop();
scoped_refptr<UvTaskRunner> uv_task_runner(new UvTaskRunner(loop));
base::ThreadTaskRunnerHandle handle(uv_task_runner);
// Initialize feature list.
auto feature_list = std::make_unique<base::FeatureList>();
feature_list->InitializeFromCommandLine("", "");
base::FeatureList::SetInstance(std::move(feature_list));
#if defined(_WIN64)
crash_reporter::CrashReporterWin::SetUnhandledExceptionFilter();
#endif
// Explicitly register electron's builtin modules.
NodeBindings::RegisterBuiltinModules();
// Parse and set Node.js cli flags.
SetNodeCliFlags();
int exec_argc;
const char** exec_argv;
node::Init(&argc, const_cast<const char**>(argv), &exec_argc, &exec_argv);
gin::V8Initializer::LoadV8Snapshot(
gin::V8Initializer::V8SnapshotFileType::kWithAdditionalContext);
// V8 requires a task scheduler apparently
base::ThreadPoolInstance::CreateAndStartWithDefaultParams("Electron");
// Initialize gin::IsolateHolder.
JavascriptEnvironment gin_env(loop);
node::IsolateData* isolate_data =
node::CreateIsolateData(gin_env.isolate(), loop, gin_env.platform());
CHECK_NE(nullptr, isolate_data);
node::Environment* env =
node::CreateEnvironment(isolate_data, gin_env.context(), argc, argv,
exec_argc, exec_argv, false);
CHECK_NE(nullptr, env);
// Enable support for v8 inspector.
NodeDebugger node_debugger(env);
node_debugger.Start();
node::BootstrapEnvironment(env);
env->InitializeDiagnostics();
gin_helper::Dictionary process(gin_env.isolate(), env->process_object());
#if defined(OS_WIN)
process.SetMethod("log", &ElectronBindings::Log);
#endif
process.SetMethod("crash", &ElectronBindings::Crash);
// Setup process.crashReporter.start in child node processes
gin_helper::Dictionary reporter =
gin::Dictionary::CreateEmpty(gin_env.isolate());
reporter.SetMethod("start", &crash_reporter::CrashReporter::StartInstance);
#if !defined(OS_LINUX)
reporter.SetMethod("addExtraParameter", &AddExtraParameter);
reporter.SetMethod("removeExtraParameter", &RemoveExtraParameter);
#endif
process.Set("crashReporter", reporter);
gin_helper::Dictionary versions;
if (process.Get("versions", &versions)) {
versions.SetReadOnly(ELECTRON_PROJECT_NAME, ELECTRON_VERSION_STRING);
}
node::LoadEnvironment(env);
v8::Isolate* isolate = env->isolate();
{
v8::SealHandleScope seal(isolate);
bool more;
do {
uv_run(env->event_loop(), UV_RUN_DEFAULT);
gin_env.platform()->DrainTasks(env->isolate());
more = uv_loop_alive(env->event_loop());
if (more && !env->is_stopping())
continue;
if (!uv_loop_alive(env->event_loop())) {
EmitBeforeExit(env);
}
// Emit `beforeExit` if the loop became alive either after emitting
// event, or after running some callbacks.
more = uv_loop_alive(env->event_loop());
} while (more && !env->is_stopping());
}
node_debugger.Stop();
exit_code = node::EmitExit(env);
node::ResetStdio();
env->set_can_call_into_js(false);
env->stop_sub_worker_contexts();
env->RunCleanup();
node::RunAtExit(env);
node::FreeEnvironment(env);
node::FreeIsolateData(isolate_data);
gin_env.platform()->DrainTasks(isolate);
gin_env.platform()->CancelPendingDelayedTasks(isolate);
gin_env.platform()->UnregisterIsolate(isolate);
}
// According to "src/gin/shell/gin_main.cc":
//
// gin::IsolateHolder waits for tasks running in ThreadPool in its
// destructor and thus must be destroyed before ThreadPool starts skipping
// CONTINUE_ON_SHUTDOWN tasks.
base::ThreadPoolInstance::Get()->Shutdown();
v8::V8::Dispose();
return exit_code;
}
} // namespace electron