
This also fixes a bug in PluginLoaderPosix where if the last N plugins in the canonical list crash, the callbacks are never run. BUG=17863 TEST=On Linux, plugins work as before. Review URL: http://codereview.chromium.org/8372015 TBR=rsesek@chromium.org Review URL: http://codereview.chromium.org/8351014 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@106977 0039d316-1c4b-4281-b951-d872f2087c98
121 lines
4.4 KiB
C++
121 lines
4.4 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CONTENT_BROWSER_PLUGIN_LOADER_POSIX_H_
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#define CONTENT_BROWSER_PLUGIN_LOADER_POSIX_H_
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#include <vector>
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#include "base/memory/ref_counted.h"
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#include "base/time.h"
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#include "content/browser/plugin_service.h"
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#include "content/browser/utility_process_host.h"
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#include "ipc/ipc_message.h"
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#include "webkit/plugins/webplugininfo.h"
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class FilePath;
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class UtilityProcessHost;
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namespace base {
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class MessageLoopProxy;
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}
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// This class is responsible for managing the out-of-process plugin loading on
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// POSIX systems. It primarily lives on the IO thread, but has a brief stay on
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// the FILE thread to iterate over plugin directories when it is first
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// constructed.
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//
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// The following is the algorithm used to load plugins:
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// 1. This asks the PluginList for the list of all potential plugins to attempt
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// to load. This is referred to as the canonical list.
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// 2. The child process this hosts is forked and the canonical list is sent to
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// it.
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// 3. The child process iterates over the canonical list, attempting to load
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// each plugin in the order specified by the list. It sends an IPC message
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// to the browser after each load, indicating success or failure. The two
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// processes synchronize the position in the vector that will be used to
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// attempt to load the next plugin.
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// 4. If the child dies during this process, the host forks another child and
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// resumes loading at the position past the plugin that it just attempted to
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// load, bypassing the problematic plugin.
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// 5. This algorithm continues until the canonical list has been walked to the
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// end, after which the list of loaded plugins is set on the PluginList and
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// the completion callback is run.
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class PluginLoaderPosix : public UtilityProcessHost::Client,
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IPC::Message::Sender {
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public:
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PluginLoaderPosix();
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// Must be called from the IO thread.
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void LoadPlugins(scoped_refptr<base::MessageLoopProxy> target_loop,
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const PluginService::GetPluginsCallback& callback);
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// UtilityProcessHost::Client:
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virtual void OnProcessCrashed(int exit_code) OVERRIDE;
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virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
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// IPC::Message::Sender:
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virtual bool Send(IPC::Message* msg);
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private:
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struct PendingCallback {
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PendingCallback(scoped_refptr<base::MessageLoopProxy> target_loop,
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const PluginService::GetPluginsCallback& callback);
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~PendingCallback();
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scoped_refptr<base::MessageLoopProxy> target_loop;
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PluginService::GetPluginsCallback callback;
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};
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virtual ~PluginLoaderPosix();
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// Called on the FILE thread to get the list of plugin paths to probe.
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void GetPluginsToLoad();
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// Must be called on the IO thread.
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virtual void LoadPluginsInternal();
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// Message handlers.
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void OnPluginLoaded(const webkit::WebPluginInfo& plugin);
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void OnPluginLoadFailed(const FilePath& plugin_path);
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// Checks if the plugin path is an internal plugin, and, if it is, adds it to
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// |loaded_plugins_|.
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bool MaybeAddInternalPlugin(const FilePath& plugin_path);
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// Runs all the registered callbacks on each's target loop if the condition
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// for ending the load process is done (i.e. the |next_load_index_| is outside
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// the ranage of the |canonical_list_|).
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void RunPendingCallbacks();
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// The process host for which this is a client.
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UtilityProcessHost* process_host_;
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// A list of paths to plugins which will be loaded by the utility process, in
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// the order specified by this vector.
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std::vector<FilePath> canonical_list_;
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// The index in |canonical_list_| of the plugin that the child process will
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// attempt to load next.
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size_t next_load_index_;
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// Internal plugins that have been registered at the time of loading.
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std::vector<webkit::WebPluginInfo> internal_plugins_;
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// A vector of plugins that have been loaded successfully.
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std::vector<webkit::WebPluginInfo> loaded_plugins_;
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// The callback and message loop on which the callback will be run when the
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// plugin loading process has been completed.
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std::vector<PendingCallback> callbacks_;
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// The time at which plugin loading started.
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base::TimeTicks load_start_time_;
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friend class MockPluginLoaderPosix;
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DISALLOW_COPY_AND_ASSIGN(PluginLoaderPosix);
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};
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#endif // CONTENT_BROWSER_PLUGIN_LOADER_POSIX_H_
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