Method InitializeThreads

snapshot/linux/process_reader_linux.cc:380–422

}

void ProcessReaderLinux::InitializeThreads() {
  DCHECK(threads_.empty());
  initialized_threads_ = true;

  pid_t pid = ProcessID();
  if (pid == getpid()) {
    // TODO(jperaza): ptrace can't be used on threads in the same thread group.
    // Using clone to create a new thread in it's own thread group doesn't work
    // because glibc doesn't support threads it didn't create via pthreads.
    // Fork a new process to snapshot us and copy the data back?
    LOG(ERROR) << "not implemented";
    return;
  }

  Thread main_thread;
  main_thread.tid = pid;
  if (main_thread.InitializePtrace(connection_)) {
    main_thread.InitializeStack(this);
    threads_.push_back(main_thread);
  } else {
    LOG(WARNING) << "Couldn't initialize main thread.";
  }

  bool main_thread_found = false;
  std::vector<pid_t> thread_ids;
  bool result = connection_->Threads(&thread_ids);
  DCHECK(result);
  for (pid_t tid : thread_ids) {
    if (tid == pid) {
      DCHECK(!main_thread_found);
      main_thread_found = true;
      continue;
    }

    Thread thread;
    thread.tid = tid;
    if (connection_->Attach(tid) && thread.InitializePtrace(connection_)) {
      thread.InitializeStack(this);
      threads_.push_back(thread);
    }
  }
  DCHECK(main_thread_found);
}

void ProcessReaderLinux::InitializeModules() {
  INITIALIZATION_STATE_DCHECK_VALID(initialized_);