michael@0: // Copyright (c) 2009 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: #include "chrome/common/child_process_info.h"
michael@0: 
michael@0: #include <limits>
michael@0: 
michael@0: #include "base/logging.h"
michael@0: #include "base/process_util.h"
michael@0: #include "base/rand_util.h"
michael@0: #include "base/string_util.h"
michael@0: 
michael@0: std::wstring ChildProcessInfo::GetTypeNameInEnglish(
michael@0:     ChildProcessInfo::ProcessType type) {
michael@0:   switch (type) {
michael@0:     case BROWSER_PROCESS:
michael@0:       return L"Browser";
michael@0:     case RENDER_PROCESS:
michael@0:       return L"Tab";
michael@0:     case PLUGIN_PROCESS:
michael@0:       return L"Plug-in";
michael@0:     case WORKER_PROCESS:
michael@0:       return L"Web Worker";
michael@0:     case UNKNOWN_PROCESS:
michael@0:       default:
michael@0:       DCHECK(false) << "Unknown child process type!";
michael@0:       return L"Unknown";
michael@0:     }
michael@0: }
michael@0: 
michael@0: std::wstring ChildProcessInfo::GetLocalizedTitle() const {
michael@0:   return name_;
michael@0: }
michael@0: 
michael@0: ChildProcessInfo::ChildProcessInfo(ProcessType type) {
michael@0:   // This constructor is only used by objects which derive from this class,
michael@0:   // which means *this* is a real object that refers to a child process, and not
michael@0:   // just a simple object that contains information about it.  So add it to our
michael@0:   // list of running processes.
michael@0:   type_ = type;
michael@0:   pid_ = -1;
michael@0: }
michael@0: 
michael@0: 
michael@0: ChildProcessInfo::~ChildProcessInfo() {
michael@0: }
michael@0: 
michael@0: std::wstring ChildProcessInfo::GenerateRandomChannelID(void* instance) {
michael@0:   // Note: the string must start with the current process id, this is how
michael@0:   // child processes determine the pid of the parent.
michael@0:   // Build the channel ID.  This is composed of a unique identifier for the
michael@0:   // parent browser process, an identifier for the child instance, and a random
michael@0:   // component. We use a random component so that a hacked child process can't
michael@0:   // cause denial of service by causing future named pipe creation to fail.
michael@0:   return StringPrintf(L"%d.%x.%d",
michael@0:                       base::GetCurrentProcId(), instance,
michael@0:                       base::RandInt(0, std::numeric_limits<int>::max()));
michael@0: }