C++ ContentParent类代码示例

void
TabParent::Destroy()
{
  if (mIsDestroyed) {
    return;
  }

  // If this fails, it's most likely due to a content-process crash,
  // and auto-cleanup will kick in.  Otherwise, the child side will
  // destroy itself and send back __delete__().
  unused << SendDestroy();

  const InfallibleTArray<PIndexedDBParent*>& idbParents =
    ManagedPIndexedDBParent();
  for (uint32_t i = 0; i < idbParents.Length(); ++i) {
    static_cast<IndexedDBParent*>(idbParents[i])->Disconnect();
  }

  if (RenderFrameParent* frame = GetRenderFrame()) {
    frame->Destroy();
  }
  mIsDestroyed = true;

  ContentParent* cp = static_cast<ContentParent*>(Manager());
  cp->NotifyTabDestroying(this);
  mMarkedDestroying = true;
}

mozilla::ipc::IProtocol*
CrashReporterParent::CloneProtocol(Channel* aChannel,
                                   mozilla::ipc::ProtocolCloneContext* aCtx)
{
#ifdef MOZ_CRASHREPORTER
    ContentParent* contentParent = aCtx->GetContentParent();
    CrashReporter::ThreadId childThreadId = contentParent->Pid();
    GeckoProcessType childProcessType =
        contentParent->Process()->GetProcessType();

    nsAutoPtr<PCrashReporterParent> actor(
        contentParent->AllocPCrashReporterParent(childThreadId,
                                                 childProcessType)
    );
    if (!actor ||
        !contentParent->RecvPCrashReporterConstructor(actor,
                                                      childThreadId,
                                                      childThreadId)) {
      return nullptr;
    }

    return actor.forget();
#else
    MOZ_CRASH("Not Implemented");
    return nullptr;
#endif
}

bool
TabParent::Recv__delete__()
{
  ContentParent* cp = static_cast<ContentParent*>(Manager());
  cp->NotifyTabDestroyed(this, mMarkedDestroying);
  return true;
}

BlobParent*
FileSystemTaskBase::GetBlobParent(BlobImpl* aFile) const
{
  MOZ_ASSERT(XRE_IsParentProcess(),
             "Only call from parent process!");
  MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
  MOZ_ASSERT(aFile);

  // Load the lazy dom file data from the parent before sending to the child.
  nsString mimeType;
  aFile->GetType(mimeType);

  // We call GetSize and GetLastModified to prepopulate the value in the
  // BlobImpl.
  {
    ErrorResult rv;
    aFile->GetSize(rv);
    rv.SuppressException();
  }

  {
    ErrorResult rv;
    aFile->GetLastModified(rv);
    rv.SuppressException();
  }

  ContentParent* cp = static_cast<ContentParent*>(mRequestParent->Manager());
  return cp->GetOrCreateActorForBlobImpl(aFile);
}

bool
ContentPermissionRequestParent::IsBeingDestroyed()
{
  // When ContentParent::MarkAsDead() is called, we are being destroyed.
  // It's unsafe to send out any message now.
  ContentParent* contentParent = static_cast<ContentParent*>(Manager());
  return !contentParent->IsAlive();
}

mozilla::ipc::IProtocol*
JavaScriptParent::CloneProtocol(Channel* aChannel, ProtocolCloneContext* aCtx)
{
    ContentParent *contentParent = aCtx->GetContentParent();
    nsAutoPtr<PJavaScriptParent> actor(contentParent->AllocPJavaScriptParent());
    if (!actor || !contentParent->RecvPJavaScriptConstructor(actor)) {
        return nullptr;
    }
    return actor.forget();
}

NS_IMETHODIMP
nsMemoryInfoDumper::DumpGCAndCCLogsToFile(const nsAString& aIdentifier,
                                          bool aDumpAllTraces,
                                          bool aDumpChildProcesses,
                                          nsIDumpGCAndCCLogsCallback* aCallback)
{
  nsString identifier(aIdentifier);
  EnsureNonEmptyIdentifier(identifier);
  nsCOMPtr<nsIDumpGCAndCCLogsCallback> callbackHolder =
    new nsDumpGCAndCCLogsCallbackHolder(aCallback);

  if (aDumpChildProcesses) {
    nsTArray<ContentParent*> children;
    ContentParent::GetAll(children);
    for (uint32_t i = 0; i < children.Length(); i++) {
      ContentParent* cp = children[i];
      nsCOMPtr<nsICycleCollectorLogSink> logSink =
        nsCycleCollector_createLogSink();

      logSink->SetFilenameIdentifier(identifier);
      logSink->SetProcessIdentifier(cp->Pid());

      Unused << cp->CycleCollectWithLogs(aDumpAllTraces, logSink,
                                         callbackHolder);
    }
  }

  nsCOMPtr<nsICycleCollectorListener> logger =
    do_CreateInstance("@mozilla.org/cycle-collector-logger;1");

  if (aDumpAllTraces) {
    nsCOMPtr<nsICycleCollectorListener> allTracesLogger;
    logger->AllTraces(getter_AddRefs(allTracesLogger));
    logger = allTracesLogger;
  }

  nsCOMPtr<nsICycleCollectorLogSink> logSink;
  logger->GetLogSink(getter_AddRefs(logSink));

  logSink->SetFilenameIdentifier(identifier);

  nsJSContext::CycleCollectNow(logger);

  nsCOMPtr<nsIFile> gcLog, ccLog;
  logSink->GetGcLog(getter_AddRefs(gcLog));
  logSink->GetCcLog(getter_AddRefs(ccLog));
  callbackHolder->OnDump(gcLog, ccLog, /* parent = */ true);

  return NS_OK;
}

bool
ScreenManagerParent::RecvScreenForBrowser(const TabId& aTabId,
                                          ScreenDetails* aRetVal,
                                          bool* aSuccess)
{
  *aSuccess = false;
#ifdef MOZ_VALGRIND
  // Zero this so that Valgrind doesn't complain when we send it to another
  // process.
  memset(aRetVal, 0, sizeof(ScreenDetails));
#endif

  // Find the mWidget associated with the tabparent, and then return
  // the nsIScreen it's on.
  ContentParent* cp = static_cast<ContentParent*>(this->Manager());
  ContentProcessManager* cpm = ContentProcessManager::GetSingleton();
  nsRefPtr<TabParent> tabParent =
    cpm->GetTopLevelTabParentByProcessAndTabId(cp->ChildID(), aTabId);
  if(!tabParent){
    return false;
  }

  nsCOMPtr<nsIWidget> widget = tabParent->GetWidget();

  nsCOMPtr<nsIScreen> screen;
  if (widget) {
    if (widget->GetNativeData(NS_NATIVE_WINDOW)) {
      mScreenMgr->ScreenForNativeWidget(widget->GetNativeData(NS_NATIVE_WINDOW),
                                        getter_AddRefs(screen));
    }
  } else {
    nsresult rv = mScreenMgr->GetPrimaryScreen(getter_AddRefs(screen));
    if (NS_WARN_IF(NS_FAILED(rv))) {
      return true;
    }
  }

  NS_ENSURE_TRUE(screen, true);

  ScreenDetails details;
  if (!ExtractScreenDetails(screen, details)) {
    return true;
  }

  *aRetVal = details;
  *aSuccess = true;
  return true;
}

void
FilePickerParent::SendFiles(const nsCOMArray<nsIDOMFile>& aDomfiles)
{
  ContentParent* parent = static_cast<ContentParent*>(Manager()->Manager());
  InfallibleTArray<PBlobParent*> files;

  for (unsigned i = 0; i < aDomfiles.Length(); i++) {
    BlobParent* blob = parent->GetOrCreateActorForBlob(aDomfiles[i]);
    if (blob) {
      files.AppendElement(blob);
    }
  }

  InputFiles infiles;
  infiles.filesParent().SwapElements(files);
  unused << Send__delete__(this, infiles, mResult);
}

FileSystemResponseValue
GetFileOrDirectoryTask::GetSuccessRequestResult() const
{
  MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
  if (mIsDirectory) {
    return FileSystemDirectoryResponse(mTargetRealPath);
  }

  ContentParent* cp = static_cast<ContentParent*>(mRequestParent->Manager());
  BlobParent* actor = cp->GetOrCreateActorForBlob(mTargetFile);
  if (!actor) {
    return FileSystemErrorResponse(NS_ERROR_DOM_FILESYSTEM_UNKNOWN_ERR);
  }
  FileSystemFileResponse response;
  response.blobParent() = actor;
  return response;
}

bool
AssertAppProcess(PBrowserParent* aActor,
                 AssertAppProcessType aType,
                 const char* aCapability)
{
  if (!aActor) {
    NS_WARNING("Testing process capability for null actor");
    return false;
  }

  TabParent* tab = static_cast<TabParent*>(aActor);
  nsCOMPtr<mozIApplication> app = tab->GetOwnOrContainingApp();
  bool aValid = false;

  // isBrowser frames inherit their app descriptor to identify their
  // data storage, but they don't inherit the capability associated
  // with that descriptor.
  if (app && (aType == ASSERT_APP_HAS_PERMISSION || !tab->IsBrowserElement())) {
    switch (aType) {
      case ASSERT_APP_HAS_PERMISSION:
      case ASSERT_APP_PROCESS_PERMISSION:
        if (!NS_SUCCEEDED(app->HasPermission(aCapability, &aValid))) {
          aValid = false;
        }
        break;
      case ASSERT_APP_PROCESS_MANIFEST_URL: {
        nsAutoString manifestURL;
        if (NS_SUCCEEDED(app->GetManifestURL(manifestURL)) &&
            manifestURL.EqualsASCII(aCapability)) {
          aValid = true;
        }
        break;
      }
      default:
        break;
    }
  }

  if (!aValid) {
    printf_stderr("Security problem: Content process does not have `%s'.  It will be killed.\n", aCapability);
    ContentParent* process = tab->Manager();
    process->KillHard();
  }
  return aValid;
}

nsresult
DeviceStorageRequestParent::PostBlobSuccessEvent::CancelableRun() {
  NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");

  nsString mime;
  CopyASCIItoUTF16(mMimeType, mime);

  nsCOMPtr<nsIDOMBlob> blob = new nsDOMFileFile(mFile->mPath, mime, mLength, mFile->mFile);

  ContentParent* cp = static_cast<ContentParent*>(mParent->Manager());
  BlobParent* actor = cp->GetOrCreateActorForBlob(blob);

  BlobResponse response;
  response.blobParent() = actor;

  unused <<  mParent->Send__delete__(mParent, response);
  return NS_OK;
}

void FilePickerParent::SendFilesOrDirectories(
    const nsTArray<BlobImplOrString>& aData) {
  ContentParent* parent = TabParent::GetFrom(Manager())->Manager();

  if (mMode == nsIFilePicker::modeGetFolder) {
    MOZ_ASSERT(aData.Length() <= 1);
    if (aData.IsEmpty()) {
      Unused << Send__delete__(this, void_t(), mResult);
      return;
    }

    MOZ_ASSERT(aData[0].mType == BlobImplOrString::eDirectoryPath);

    // Let's inform the security singleton about the given access of this tab on
    // this directory path.
    RefPtr<FileSystemSecurity> fss = FileSystemSecurity::GetOrCreate();
    fss->GrantAccessToContentProcess(parent->ChildID(),
                                     aData[0].mDirectoryPath);

    InputDirectory input;
    input.directoryPath() = aData[0].mDirectoryPath;
    Unused << Send__delete__(this, input, mResult);
    return;
  }

  InfallibleTArray<IPCBlob> ipcBlobs;

  for (unsigned i = 0; i < aData.Length(); i++) {
    IPCBlob ipcBlob;

    MOZ_ASSERT(aData[i].mType == BlobImplOrString::eBlobImpl);
    nsresult rv = IPCBlobUtils::Serialize(aData[i].mBlobImpl, parent, ipcBlob);
    if (NS_WARN_IF(NS_FAILED(rv))) {
      break;
    }

    ipcBlobs.AppendElement(ipcBlob);
  }

  InputBlobs inblobs;
  inblobs.blobs().SwapElements(ipcBlobs);

  Unused << Send__delete__(this, inblobs, mResult);
}

nsresult
nsPermissionManager::AddInternal(const nsAFlatCString &aHost,
                                 const nsAFlatCString &aType,
                                 PRUint32              aPermission,
                                 PRInt64               aID,
                                 PRUint32              aExpireType,
                                 PRInt64               aExpireTime,
                                 NotifyOperationType   aNotifyOperation,
                                 DBOperationType       aDBOperation)
{
  if (!IsChildProcess()) {
    IPC::Permission permission((aHost),
                               (aType),
                               aPermission, aExpireType, aExpireTime);

    nsTArray<ContentParent*> cplist;
    ContentParent::GetAll(cplist);
    for (PRUint32 i = 0; i < cplist.Length(); ++i) {
      ContentParent* cp = cplist[i];
      if (cp->NeedsPermissionsUpdate())
        unused << cp->SendAddPermission(permission);
    }
  }

  if (!gHostArena) {
    gHostArena = new PLArenaPool;
    if (!gHostArena)
      return NS_ERROR_OUT_OF_MEMORY;    
    PL_INIT_ARENA_POOL(gHostArena, "PermissionHostArena", HOST_ARENA_SIZE);
  }

  // look up the type index
  PRInt32 typeIndex = GetTypeIndex(aType.get(), true);
  NS_ENSURE_TRUE(typeIndex != -1, NS_ERROR_OUT_OF_MEMORY);

  // When an entry already exists, PutEntry will return that, instead
  // of adding a new one
  nsHostEntry *entry = mHostTable.PutEntry(aHost.get());
  if (!entry) return NS_ERROR_FAILURE;
  if (!entry->GetKey()) {
    mHostTable.RawRemoveEntry(entry);
    return NS_ERROR_OUT_OF_MEMORY;
  }

  // figure out the transaction type, and get any existing permission value
  OperationType op;
  PRInt32 index = entry->GetPermissionIndex(typeIndex);
  if (index == -1) {
    if (aPermission == nsIPermissionManager::UNKNOWN_ACTION)
      op = eOperationNone;
    else
      op = eOperationAdding;

  } else {
    nsPermissionEntry oldPermissionEntry = entry->GetPermissions()[index];

    // remove the permission if the permission is UNKNOWN, update the
    // permission if its value or expire type have changed OR if the time has
    // changed and the expire type is time, otherwise, don't modify.  There's
    // no need to modify a permission that doesn't expire with time when the
    // only thing changed is the expire time.
    if (aPermission == oldPermissionEntry.mPermission && 
        aExpireType == oldPermissionEntry.mExpireType &&
        (aExpireType != nsIPermissionManager::EXPIRE_TIME || 
         aExpireTime == oldPermissionEntry.mExpireTime))
      op = eOperationNone;
    else if (aPermission == nsIPermissionManager::UNKNOWN_ACTION)
      op = eOperationRemoving;
    else
      op = eOperationChanging;
  }

  // do the work for adding, deleting, or changing a permission:
  // update the in-memory list, write to the db, and notify consumers.
  PRInt64 id;
  switch (op) {
  case eOperationNone:
    {
      // nothing to do
      return NS_OK;
    }

  case eOperationAdding:
    {
      if (aDBOperation == eWriteToDB) {
        // we'll be writing to the database - generate a known unique id
        id = ++mLargestID;
      } else {
        // we're reading from the database - use the id already assigned
        id = aID;
      }

      entry->GetPermissions().AppendElement(nsPermissionEntry(typeIndex, aPermission, id, aExpireType, aExpireTime));

      if (aDBOperation == eWriteToDB && aExpireType != nsIPermissionManager::EXPIRE_SESSION)
        UpdateDB(op, mStmtInsert, id, aHost, aType, aPermission, aExpireType, aExpireTime);

      if (aNotifyOperation == eNotify) {
        NotifyObserversWithPermission(aHost,
                                      mTypeArray[typeIndex],
//.........这里部分代码省略.........