Logo Search packages:      
Sourcecode: chromium-browser version File versions  Download package


// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "build/build_config.h"

#if defined(OS_WIN)
#include <windows.h>
#include <objidl.h>
#include <mlang.h>

#include "chrome/renderer/render_process_impl.h"

#include "app/surface/transport_dib.h"
#include "base/basictypes.h"
#include "base/command_line.h"
#include "base/compiler_specific.h"
#include "base/file_util.h"
#include "base/message_loop.h"
#include "base/histogram.h"
#include "base/path_service.h"
#include "base/sys_info.h"
// TODO(jar): DNS calls should be renderer specific, not including browser.
#include "chrome/browser/net/dns_global.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/chrome_paths.h"
#include "chrome/common/render_messages.h"
#include "chrome/common/nacl_types.h"
#include "chrome/renderer/render_view.h"
#include "ipc/ipc_channel.h"
#include "ipc/ipc_message_utils.h"
#include "media/base/media.h"
#include "media/base/media_switches.h"
#include "native_client/src/trusted/plugin/nacl_entry_points.h"
#include "webkit/glue/plugins/plugin_instance.h"
#include "webkit/glue/plugins/plugin_lib.h"
#include "webkit/glue/webkit_glue.h"

#if defined(OS_MACOSX)
#include "base/mac_util.h"

namespace {

bool LaunchNaClProcess(const char* url,
                       int imc_fd,
                       nacl::Handle* imc_handle,
                       nacl::Handle* nacl_process_handle,
                       int* nacl_process_id) {
  // TODO(gregoryd): nacl::FileDescriptor will be soon merged with
  // base::FileDescriptor
  nacl::FileDescriptor imc_descriptor;
  base::ProcessHandle nacl_process;
  if (!RenderThread::current()->Send(
    new ViewHostMsg_LaunchNaCl(ASCIIToWide(url),
        reinterpret_cast<base::ProcessId*>(nacl_process_id)))) {
    return false;
  *imc_handle = nacl::ToNativeHandle(imc_descriptor);
  *nacl_process_handle = nacl_process;
  return true;

}  // namespace


    : ALLOW_THIS_IN_INITIALIZER_LIST(shared_mem_cache_cleaner_(
          this, &RenderProcessImpl::ClearTransportDIBCache)),
      transport_dib_next_sequence_number_(0) {
  in_process_plugins_ = InProcessPlugins();
  for (size_t i = 0; i < arraysize(shared_mem_cache_); ++i)
    shared_mem_cache_[i] = NULL;

#if defined(OS_WIN)
  // HACK:  See http://b/issue?id=1024307 for rationale.
  if (GetModuleHandle(L"LPK.DLL") == NULL) {
    // Makes sure lpk.dll is loaded by gdi32 to make sure ExtTextOut() works
    // when buffering into a EMF buffer for printing.
    typedef BOOL (__stdcall *GdiInitializeLanguagePack)(int LoadedShapingDLLs);
    GdiInitializeLanguagePack gdi_init_lpk =
    if (gdi_init_lpk) {

  // Out of process dev tools rely upon auto break behavior.
      // Enable lazy in-memory profiling.
      L" --prof --prof-lazy --logfile=* --compress-log");

  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
  if (command_line.HasSwitch(switches::kJavaScriptFlags)) {

  if (command_line.HasSwitch(switches::kEnableWatchdog)) {
    // TODO(JAR): Need to implement renderer IO msgloop watchdog.

  if (command_line.HasSwitch(switches::kDumpHistogramsOnExit)) {

  if (command_line.HasSwitch(switches::kInternalNaCl))

  if (!command_line.HasSwitch(switches::kDisableByteRangeSupport)) {

#if defined(OS_MACOSX)
  FilePath bundle_path = mac_util::MainAppBundlePath();

  initialized_media_library_ =
  FilePath module_path;
  initialized_media_library_ =
      PathService::Get(base::DIR_MODULE, &module_path) &&

  // TODO(hclam): Add more checks here. Currently this is not used.
  if (CommandLine::ForCurrentProcess()->HasSwitch(
          switches::kEnableOpenMax)) {

  // Load the pdf plugin before the sandbox is turned on.
  FilePath pdf;
  if (PathService::Get(chrome::FILE_PDF_PLUGIN, &pdf)) {
    static scoped_refptr<NPAPI::PluginLib> pdf_lib =
    // Actually load the plugin.
    // Keep an instance around to prevent the plugin unloading after a pdf is
    // closed.
    // Don't use scoped_ptr here because then get asserts on process shut down
    // when running in --single-process.
    static NPAPI::PluginInstance* instance = pdf_lib->CreateInstance("");
    instance->plugin_lib();  // Quiet unused variable warnings in gcc.

RenderProcessImpl::~RenderProcessImpl() {
  // TODO(port): Try and limit what we pull in for our non-Win unit test bundle.
#ifndef NDEBUG
  // log important leaked objects


bool RenderProcessImpl::InProcessPlugins() {
  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
#if defined(OS_LINUX)
  // Plugin processes require a UI message loop, and the Linux message loop
  // implementation only allows one UI loop per process.
  if (command_line.HasSwitch(switches::kInProcessPlugins))
    NOTIMPLEMENTED() << ": in process plugins not supported on Linux";
  return command_line.HasSwitch(switches::kInProcessPlugins);
  return command_line.HasSwitch(switches::kInProcessPlugins) ||

// -----------------------------------------------------------------------------
// Platform specific code for dealing with bitmap transport...

TransportDIB* RenderProcessImpl::CreateTransportDIB(size_t size) {
#if defined(OS_WIN) || defined(OS_LINUX)
  // Windows and Linux create transport DIBs inside the renderer
  return TransportDIB::Create(size, transport_dib_next_sequence_number_++);
#elif defined(OS_MACOSX)  // defined(OS_WIN) || defined(OS_LINUX)
  // Mac creates transport DIBs in the browser, so we need to do a sync IPC to
  // get one.  The TransportDIB is cached in the browser.
  TransportDIB::Handle handle;
  IPC::Message* msg = new ViewHostMsg_AllocTransportDIB(size, true, &handle);
  if (!main_thread()->Send(msg))
    return NULL;
  if (handle.fd < 0)
    return NULL;
  return TransportDIB::Map(handle);
#endif  // defined(OS_MACOSX)

void RenderProcessImpl::FreeTransportDIB(TransportDIB* dib) {
  if (!dib)

#if defined(OS_MACOSX)
  // On Mac we need to tell the browser that it can drop a reference to the
  // shared memory.
  IPC::Message* msg = new ViewHostMsg_FreeTransportDIB(dib->id());

  delete dib;

// -----------------------------------------------------------------------------

skia::PlatformCanvas* RenderProcessImpl::GetDrawingCanvas(
    TransportDIB** memory, const gfx::Rect& rect) {
  int width = rect.width();
  int height = rect.height();
  const size_t stride = skia::PlatformCanvas::StrideForWidth(rect.width());
#if defined(OS_LINUX)
  const size_t max_size = base::SysInfo::MaxSharedMemorySize();
  const size_t max_size = 0;

  // If the requested size is too big, reduce the height. Ideally we might like
  // to reduce the width as well to make the size reduction more "balanced", but
  // it rarely comes up in practice.
  if ((max_size != 0) && (height * stride > max_size))
    height = max_size / stride;

  const size_t size = height * stride;

  if (!GetTransportDIBFromCache(memory, size)) {
    *memory = CreateTransportDIB(size);
    if (!*memory)
      return false;

  return (*memory)->GetPlatformCanvas(width, height);

void RenderProcessImpl::ReleaseTransportDIB(TransportDIB* mem) {
  if (PutSharedMemInCache(mem)) {


bool RenderProcessImpl::UseInProcessPlugins() const {
  return in_process_plugins_;

bool RenderProcessImpl::HasInitializedMediaLibrary() const {
  return initialized_media_library_;

bool RenderProcessImpl::GetTransportDIBFromCache(TransportDIB** mem,
                                             size_t size) {
  // look for a cached object that is suitable for the requested size.
  for (size_t i = 0; i < arraysize(shared_mem_cache_); ++i) {
    if (shared_mem_cache_[i] &&
        size <= shared_mem_cache_[i]->size()) {
      *mem = shared_mem_cache_[i];
      shared_mem_cache_[i] = NULL;
      return true;

  return false;

int RenderProcessImpl::FindFreeCacheSlot(size_t size) {
  // simple algorithm:
  //  - look for an empty slot to store mem, or
  //  - if full, then replace smallest entry which is smaller than |size|
  for (size_t i = 0; i < arraysize(shared_mem_cache_); ++i) {
    if (shared_mem_cache_[i] == NULL)
      return i;

  size_t smallest_size = size;
  int smallest_index = -1;

  for (size_t i = 1; i < arraysize(shared_mem_cache_); ++i) {
    const size_t entry_size = shared_mem_cache_[i]->size();
    if (entry_size < smallest_size) {
      smallest_size = entry_size;
      smallest_index = i;

  if (smallest_index != -1) {
    shared_mem_cache_[smallest_index] = NULL;

  return smallest_index;

bool RenderProcessImpl::PutSharedMemInCache(TransportDIB* mem) {
  const int slot = FindFreeCacheSlot(mem->size());
  if (slot == -1)
    return false;

  shared_mem_cache_[slot] = mem;
  return true;

void RenderProcessImpl::ClearTransportDIBCache() {
  for (size_t i = 0; i < arraysize(shared_mem_cache_); ++i) {
    if (shared_mem_cache_[i]) {
      shared_mem_cache_[i] = NULL;

Generated by  Doxygen 1.6.0   Back to index