content/renderer/pepper/pepper_plugin_registry.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/renderer/pepper/pepper_plugin_registry.h"
   6
   7 #include "base/logging.h"
   8 #include "content/common/pepper_plugin_list.h"
   9 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
  10 #include "content/renderer/pepper/plugin_module.h"
  11 #include "ppapi/shared_impl/ppapi_permissions.h"
  12
  13 namespace content {
  14
  15 // static
  16 PepperPluginRegistry* PepperPluginRegistry::GetInstance() {
  17   static PepperPluginRegistry* registry = NULL;
  18   // This object leaks.  It is a temporary hack to work around a crash.
  19   // http://code.google.com/p/chromium/issues/detail?id=63234
  20   if (!registry) {
  21     registry = new PepperPluginRegistry;
  22     registry->Initialize();
  23   }
  24   return registry;
  25 }
  26
  27 const PepperPluginInfo* PepperPluginRegistry::GetInfoForPlugin(
  28     const WebPluginInfo& info) {
  29   for (size_t i = 0; i < plugin_list_.size(); ++i) {
  30     if (info.path == plugin_list_[i].path)
  31       return &plugin_list_[i];
  32   }
  33   // We did not find the plugin in our list. But wait! the plugin can also
  34   // be a latecomer, as it happens with pepper flash. This information
  35   // is actually in |info| and we can use it to construct it and add it to
  36   // the list. This same deal needs to be done in the browser side in
  37   // PluginService.
  38   PepperPluginInfo plugin;
  39   if (!MakePepperPluginInfo(info, &plugin))
  40     return NULL;
  41
  42   plugin_list_.push_back(plugin);
  43   return &plugin_list_[plugin_list_.size() - 1];
  44 }
  45
  46 PluginModule* PepperPluginRegistry::GetLiveModule(const base::FilePath& path) {
  47   NonOwningModuleMap::iterator module_iter = live_modules_.find(path);
  48   if (module_iter == live_modules_.end())
  49     return NULL;
  50
  51   // Check the instances for the module to see if they've all been Delete()d.
  52   // We don't want to return a PluginModule in that case, since the plugin may
  53   // have exited already.
  54   const PluginModule::PluginInstanceSet& instance_set =
  55       module_iter->second->GetAllInstances();
  56
  57   // If instance_set is empty, InstanceCreated() hasn't been called yet, so
  58   // it's safe to return the PluginModule.
  59   if (instance_set.empty())
  60     return module_iter->second;
  61
  62   PluginModule::PluginInstanceSet::const_iterator instance_iter =
  63       instance_set.begin();
  64   while (instance_iter != instance_set.end()) {
  65     if (!(*instance_iter)->is_deleted())
  66       return module_iter->second;
  67     ++instance_iter;
  68   }
  69   return NULL;
  70 }
  71
  72 void PepperPluginRegistry::AddLiveModule(const base::FilePath& path,
  73                                          PluginModule* module) {
  74   DCHECK(live_modules_.find(path) == live_modules_.end());
  75   live_modules_[path] = module;
  76 }
  77
  78 void PepperPluginRegistry::PluginModuleDead(PluginModule* dead_module) {
  79   // DANGER: Don't dereference the dead_module pointer! It may be in the
  80   // process of being deleted.
  81
  82   // Modules aren't destroyed very often and there are normally at most a
  83   // couple of them. So for now we just do a brute-force search.
  84   for (NonOwningModuleMap::iterator i = live_modules_.begin();
  85        i != live_modules_.end();
  86        ++i) {
  87     if (i->second == dead_module) {
  88       live_modules_.erase(i);
  89       return;
  90     }
  91   }
  92   // Can occur in tests.
  93 }
  94
  95 PepperPluginRegistry::~PepperPluginRegistry() {
  96   // Explicitly clear all preloaded modules first. This will cause callbacks
  97   // to erase these modules from the live_modules_ list, and we don't want
  98   // that to happen implicitly out-of-order.
  99   preloaded_modules_.clear();
 100
 101   DCHECK(live_modules_.empty());
 102 }
 103
 104 PepperPluginRegistry::PepperPluginRegistry() {}
 105
 106 void PepperPluginRegistry::Initialize() {
 107   ComputePepperPluginList(&plugin_list_);
 108
 109   // Note that in each case, AddLiveModule must be called before completing
 110   // initialization. If we bail out (in the continue clauses) before saving
 111   // the initialized module, it will still try to unregister itself in its
 112   // destructor.
 113   for (size_t i = 0; i < plugin_list_.size(); i++) {
 114     const PepperPluginInfo& current = plugin_list_[i];
 115     if (current.is_out_of_process)
 116       continue;  // Out of process plugins need no special pre-initialization.
 117
 118     scoped_refptr<PluginModule> module =
 119         new PluginModule(current.name,
 120                          current.path,
 121                          ppapi::PpapiPermissions(current.permissions));
 122     AddLiveModule(current.path, module.get());
 123     if (current.is_internal) {
 124       if (!module->InitAsInternalPlugin(current.internal_entry_points)) {
 125         DLOG(ERROR) << "Failed to load pepper module: " << current.path.value();
 126         continue;
 127       }
 128     } else {
 129       // Preload all external plugins we're not running out of process.
 130       if (!module->InitAsLibrary(current.path)) {
 131         DLOG(ERROR) << "Failed to load pepper module: " << current.path.value();
 132         continue;
 133       }
 134     }
 135     preloaded_modules_[current.path] = module;
 136   }
 137 }
 138
 139 }  // namespace content