electron/shell/browser/node_debugger.cc

// Copyright (c) 2014 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#include "shell/browser/node_debugger.h"

#include <memory>
#include <string>
#include <vector>

#include "base/command_line.h"
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "libplatform/libplatform.h"
#include "shell/common/gin_helper/dictionary.h"
#include "shell/common/node_includes.h"

namespace electron {

NodeDebugger::NodeDebugger(node::Environment* env) : env_(env) {}

NodeDebugger::~NodeDebugger() = default;

void NodeDebugger::Start() {
  auto* inspector = env_->inspector_agent();
  if (inspector == nullptr)
    return;

  std::vector<std::string> args;
  for (auto& arg : base::CommandLine::ForCurrentProcess()->argv()) {
#if defined(OS_WIN)
    args.push_back(base::UTF16ToUTF8(arg));
#else
    args.push_back(arg);
#endif
  }

  node::DebugOptions options;
  std::vector<std::string> exec_args;
  std::vector<std::string> v8_args;
  std::vector<std::string> errors;

  node::options_parser::Parse(&args, &exec_args, &v8_args, &options,
                              node::options_parser::kDisallowedInEnvironment,
                              &errors);

  if (!errors.empty()) {
    // TODO(jeremy): what's the appropriate behaviour here?
    LOG(ERROR) << "Error parsing node options: "
               << base::JoinString(errors, " ");
  }

  const char* path = "";
  if (inspector->Start(path, options,
                       std::make_shared<node::HostPort>(options.host_port),
                       true /* is_main */))
    DCHECK(inspector->IsListening());

  v8::HandleScope handle_scope(env_->isolate());
  node::profiler::StartProfilers(env_);

  if (inspector->options().break_node_first_line) {
    inspector->PauseOnNextJavascriptStatement("Break at bootstrap");
  }
}

void NodeDebugger::Stop() {
  auto* inspector = env_->inspector_agent();
  if (inspector && inspector->IsListening()) {
    inspector->WaitForDisconnect();
    inspector->Stop();
  }
}

}  // namespace electron