301 lines
10 KiB
C++
301 lines
10 KiB
C++
// Copyright (c) 2015 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "shell/app/node_main.h"
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#include <map>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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#include "base/base_switches.h"
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#include "base/command_line.h"
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#include "base/containers/fixed_flat_set.h"
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#include "base/environment.h"
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#include "base/feature_list.h"
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#include "base/strings/string_util.h"
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#include "base/strings/utf_string_conversions.h"
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#include "base/task/single_thread_task_runner.h"
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#include "base/task/thread_pool/thread_pool_instance.h"
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#include "content/public/common/content_switches.h"
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#include "electron/electron_version.h"
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#include "electron/fuses.h"
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#include "gin/array_buffer.h"
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#include "gin/public/isolate_holder.h"
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#include "gin/v8_initializer.h"
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#include "shell/app/uv_task_runner.h"
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#include "shell/browser/javascript_environment.h"
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#include "shell/common/api/electron_bindings.h"
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#include "shell/common/gin_helper/dictionary.h"
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#include "shell/common/node_bindings.h"
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#include "shell/common/node_includes.h"
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#include "shell/common/node_util.h"
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#if BUILDFLAG(IS_WIN)
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#include "chrome/child/v8_crashpad_support_win.h"
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#endif
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#if BUILDFLAG(IS_LINUX)
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#include "base/posix/global_descriptors.h"
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#include "base/strings/string_number_conversions.h"
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#include "components/crash/core/app/crash_switches.h" // nogncheck
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#include "content/public/common/content_descriptors.h"
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#endif
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#if BUILDFLAG(IS_MAC)
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#include "shell/common/mac/codesign_util.h"
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#endif
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#if !IS_MAS_BUILD()
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#include "components/crash/core/app/crashpad.h" // nogncheck
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#include "shell/app/electron_crash_reporter_client.h"
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#include "shell/common/crash_keys.h"
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#endif
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namespace {
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// Preparse Node.js cli options to pass to Node.js
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// See https://nodejs.org/api/cli.html#cli_options
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void ExitIfContainsDisallowedFlags(const std::vector<std::string>& argv) {
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// Options that are unilaterally disallowed.
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static constexpr auto disallowed = base::MakeFixedFlatSet<base::StringPiece>({
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"--enable-fips",
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"--force-fips",
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"--openssl-config",
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"--use-bundled-ca",
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"--use-openssl-ca",
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});
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for (const auto& arg : argv) {
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const auto key = base::StringPiece(arg).substr(0, arg.find('='));
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if (disallowed.contains(key)) {
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LOG(ERROR) << "The Node.js cli flag " << key
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<< " is not supported in Electron";
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// Node.js returns 9 from ProcessGlobalArgs for any errors encountered
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// when setting up cli flags and env vars. Since we're outlawing these
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// flags (making them errors) exit with the same error code for
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// consistency.
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exit(9);
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}
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}
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}
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#if IS_MAS_BUILD()
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void SetCrashKeyStub(const std::string& key, const std::string& value) {}
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void ClearCrashKeyStub(const std::string& key) {}
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#endif
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} // namespace
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namespace electron {
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v8::Local<v8::Value> GetParameters(v8::Isolate* isolate) {
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std::map<std::string, std::string> keys;
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#if !IS_MAS_BUILD()
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electron::crash_keys::GetCrashKeys(&keys);
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#endif
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return gin::ConvertToV8(isolate, keys);
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}
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int NodeMain(int argc, char* argv[]) {
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bool initialized = base::CommandLine::Init(argc, argv);
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if (!initialized) {
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LOG(ERROR) << "Failed to initialize CommandLine";
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exit(1);
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}
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auto os_env = base::Environment::Create();
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bool node_options_enabled = electron::fuses::IsNodeOptionsEnabled();
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if (!node_options_enabled) {
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os_env->UnSetVar("NODE_OPTIONS");
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}
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#if BUILDFLAG(IS_MAC)
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if (!ProcessSignatureIsSameWithCurrentApp(getppid())) {
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// On macOS, it is forbidden to run sandboxed app with custom arguments
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// from another app, i.e. args are discarded in following call:
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// exec("Sandboxed.app", ["--custom-args-will-be-discarded"])
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// However it is possible to bypass the restriction by abusing the node mode
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// of Electron apps:
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// exec("Electron.app", {env: {ELECTRON_RUN_AS_NODE: "1",
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// NODE_OPTIONS: "--require 'bad.js'"}})
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// To prevent Electron apps from being used to work around macOS security
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// restrictions, when the parent process is not part of the app bundle, all
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// environment variables starting with NODE_ will be removed.
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if (util::UnsetAllNodeEnvs()) {
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LOG(ERROR) << "Node.js environment variables are disabled because this "
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"process is invoked by other apps.";
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}
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}
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#endif // BUILDFLAG(IS_MAC)
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#if BUILDFLAG(IS_WIN)
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v8_crashpad_support::SetUp();
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#endif
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#if BUILDFLAG(IS_LINUX)
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std::string fd_string, pid_string;
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if (os_env->GetVar("CRASHDUMP_SIGNAL_FD", &fd_string) &&
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os_env->GetVar("CRASHPAD_HANDLER_PID", &pid_string)) {
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int fd = -1, pid = -1;
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DCHECK(base::StringToInt(fd_string, &fd));
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DCHECK(base::StringToInt(pid_string, &pid));
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base::GlobalDescriptors::GetInstance()->Set(kCrashDumpSignal, fd);
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// Following API is unsafe in multi-threaded scenario, but at this point
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// we are still single threaded.
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os_env->UnSetVar("CRASHDUMP_SIGNAL_FD");
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os_env->UnSetVar("CRASHPAD_HANDLER_PID");
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}
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#endif
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int exit_code = 1;
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{
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// Feed gin::PerIsolateData with a task runner.
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uv_loop_t* loop = uv_default_loop();
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auto uv_task_runner = base::MakeRefCounted<UvTaskRunner>(loop);
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base::SingleThreadTaskRunner::CurrentDefaultHandle handle(uv_task_runner);
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// Initialize feature list.
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auto feature_list = std::make_unique<base::FeatureList>();
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feature_list->InitFromCommandLine("", "");
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base::FeatureList::SetInstance(std::move(feature_list));
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// Explicitly register electron's builtin bindings.
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NodeBindings::RegisterBuiltinBindings();
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// Hack around with the argv pointer. Used for process.title = "blah".
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argv = uv_setup_args(argc, argv);
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// Parse Node.js cli flags and strip out disallowed options.
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std::vector<std::string> args(argv, argv + argc);
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ExitIfContainsDisallowedFlags(args);
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std::unique_ptr<node::InitializationResult> result =
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node::InitializeOncePerProcess(
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args,
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{node::ProcessInitializationFlags::kNoInitializeV8,
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node::ProcessInitializationFlags::kNoInitializeNodeV8Platform});
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for (const std::string& error : result->errors())
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fprintf(stderr, "%s: %s\n", args[0].c_str(), error.c_str());
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if (result->early_return() != 0) {
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return result->exit_code();
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}
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#if BUILDFLAG(IS_LINUX)
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// On Linux, initialize crashpad after Nodejs init phase so that
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// crash and termination signal handlers can be set by the crashpad client.
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if (!pid_string.empty()) {
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auto* command_line = base::CommandLine::ForCurrentProcess();
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command_line->AppendSwitchASCII(
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crash_reporter::switches::kCrashpadHandlerPid, pid_string);
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ElectronCrashReporterClient::Create();
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crash_reporter::InitializeCrashpad(false, "node");
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crash_keys::SetCrashKeysFromCommandLine(
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*base::CommandLine::ForCurrentProcess());
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crash_keys::SetPlatformCrashKey();
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// Ensure the flags and env variable does not propagate to userland.
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command_line->RemoveSwitch(crash_reporter::switches::kCrashpadHandlerPid);
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}
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#elif BUILDFLAG(IS_WIN) || (BUILDFLAG(IS_MAC) && !IS_MAS_BUILD())
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ElectronCrashReporterClient::Create();
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crash_reporter::InitializeCrashpad(false, "node");
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crash_keys::SetCrashKeysFromCommandLine(
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*base::CommandLine::ForCurrentProcess());
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crash_keys::SetPlatformCrashKey();
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#endif
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gin::V8Initializer::LoadV8Snapshot(
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gin::V8SnapshotFileType::kWithAdditionalContext);
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// V8 requires a task scheduler.
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base::ThreadPoolInstance::CreateAndStartWithDefaultParams("Electron");
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// Allow Node.js to track the amount of time the event loop has spent
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// idle in the kernel’s event provider .
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uv_loop_configure(loop, UV_METRICS_IDLE_TIME);
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// Initialize gin::IsolateHolder.
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bool setup_wasm_streaming =
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node::per_process::cli_options->get_per_isolate_options()
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->get_per_env_options()
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->experimental_fetch;
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JavascriptEnvironment gin_env(loop, setup_wasm_streaming);
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v8::Isolate* isolate = gin_env.isolate();
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v8::Isolate::Scope isolate_scope(isolate);
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v8::Locker locker(isolate);
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node::Environment* env = nullptr;
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node::IsolateData* isolate_data = nullptr;
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{
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v8::HandleScope scope(isolate);
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isolate_data = node::CreateIsolateData(isolate, loop, gin_env.platform());
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CHECK_NE(nullptr, isolate_data);
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uint64_t env_flags = node::EnvironmentFlags::kDefaultFlags |
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node::EnvironmentFlags::kHideConsoleWindows;
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env = node::CreateEnvironment(
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isolate_data, isolate->GetCurrentContext(), result->args(),
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result->exec_args(),
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static_cast<node::EnvironmentFlags::Flags>(env_flags));
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CHECK_NE(nullptr, env);
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node::SetIsolateUpForNode(isolate);
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gin_helper::Dictionary process(isolate, env->process_object());
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process.SetMethod("crash", &ElectronBindings::Crash);
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// Setup process.crashReporter in child node processes
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auto reporter = gin_helper::Dictionary::CreateEmpty(isolate);
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reporter.SetMethod("getParameters", &GetParameters);
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#if IS_MAS_BUILD()
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reporter.SetMethod("addExtraParameter", &SetCrashKeyStub);
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reporter.SetMethod("removeExtraParameter", &ClearCrashKeyStub);
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#else
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reporter.SetMethod("addExtraParameter",
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&electron::crash_keys::SetCrashKey);
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reporter.SetMethod("removeExtraParameter",
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&electron::crash_keys::ClearCrashKey);
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#endif
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process.Set("crashReporter", reporter);
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gin_helper::Dictionary versions;
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if (process.Get("versions", &versions)) {
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versions.SetReadOnly(ELECTRON_PROJECT_NAME, ELECTRON_VERSION_STRING);
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}
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}
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v8::HandleScope scope(isolate);
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node::LoadEnvironment(env, node::StartExecutionCallback{});
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// Potential reasons we get Nothing here may include: the env
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// is stopping, or the user hooks process.emit('exit').
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exit_code = node::SpinEventLoop(env).FromMaybe(1);
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node::ResetStdio();
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node::Stop(env, node::StopFlags::kDoNotTerminateIsolate);
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node::FreeEnvironment(env);
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node::FreeIsolateData(isolate_data);
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}
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// According to "src/gin/shell/gin_main.cc":
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//
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// gin::IsolateHolder waits for tasks running in ThreadPool in its
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// destructor and thus must be destroyed before ThreadPool starts skipping
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// CONTINUE_ON_SHUTDOWN tasks.
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base::ThreadPoolInstance::Get()->Shutdown();
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v8::V8::Dispose();
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return exit_code;
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}
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} // namespace electron
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