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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
/*
* Target actor for all resources in a content process of Firefox (chrome sandboxes, frame
* scripts, documents, etc.)
*
* See devtools/docs/backend/actor-hierarchy.md for more details.
*/
const { Cc, Ci, Cu } = require("chrome");
const Services = require("Services");
const { ThreadActor } = require("devtools/server/actors/thread");
const { WebConsoleActor } = require("devtools/server/actors/webconsole");
const makeDebugger = require("devtools/server/actors/utils/make-debugger");
const { Pool } = require("devtools/shared/protocol");
const { assert } = require("devtools/shared/DevToolsUtils");
const {
SourcesManager,
} = require("devtools/server/actors/utils/sources-manager");
const { Actor } = require("devtools/shared/protocol");
const {
contentProcessTargetSpec,
} = require("devtools/shared/specs/targets/content-process");
const Targets = require("devtools/server/actors/targets/index");
const Resources = require("devtools/server/actors/resources/index");
const TargetActorMixin = require("devtools/server/actors/targets/target-actor-mixin");
loader.lazyRequireGetter(
this,
"WorkerDescriptorActorList",
"devtools/server/actors/worker/worker-descriptor-actor-list",
true
);
loader.lazyRequireGetter(
this,
"MemoryActor",
"devtools/server/actors/memory",
true
);
const ContentProcessTargetActor = TargetActorMixin(
Targets.TYPES.PROCESS,
contentProcessTargetSpec,
{
initialize: function(connection) {
Actor.prototype.initialize.call(this, connection);
this.conn = connection;
this.threadActor = null;
// Use a see-everything debugger
this.makeDebugger = makeDebugger.bind(null, {
findDebuggees: dbg => dbg.findAllGlobals(),
shouldAddNewGlobalAsDebuggee: global => true,
});
const sandboxPrototype = {
get tabs() {
return Array.from(
Services.ww.getWindowEnumerator(),
win => win.docShell.messageManager
);
},
};
// Scope into which the webconsole executes:
// A sandbox with chrome privileges with a `tabs` getter.
const systemPrincipal = Cc[
"@mozilla.org/systemprincipal;1"
].createInstance(Ci.nsIPrincipal);
const sandbox = Cu.Sandbox(systemPrincipal, {
sandboxPrototype,
wantGlobalProperties: ["ChromeUtils"],
});
this._consoleScope = sandbox;
this._workerList = null;
this._workerDescriptorActorPool = null;
this._onWorkerListChanged = this._onWorkerListChanged.bind(this);
// Try to destroy the Content Process Target when the content process shuts down.
// The parent process can't communicate during shutdown as the communication channel
// is already down (message manager or JS Window Actor API).
// So that we have to observe to some event fired from this process.
// While such cleanup doesn't sound ultimately necessary (the process will be completely destroyed)
// mochitests are asserting that there is no leaks during process shutdown.
// Do not override destroy as Protocol.js may override it when calling destroy,
// and we won't be able to call removeObserver correctly.
this.destroyObserver = this.destroy.bind(this);
Services.obs.addObserver(this.destroyObserver, "xpcom-shutdown");
},
get isRootActor() {
return true;
},
get exited() {
return !this._contextPool;
},
get url() {
return undefined;
},
get window() {
return this._consoleScope;
},
get sourcesManager() {
if (!this._sourcesManager) {
assert(
this.threadActor,
"threadActor should exist when creating SourcesManager."
);
this._sourcesManager = new SourcesManager(this.threadActor);
}
return this._sourcesManager;
},
/*
* Return a Debugger instance or create one if there is none yet
*/
get dbg() {
if (!this._dbg) {
this._dbg = this.makeDebugger();
}
return this._dbg;
},
form: function() {
if (!this._consoleActor) {
this._consoleActor = new WebConsoleActor(this.conn, this);
this.manage(this._consoleActor);
}
if (!this.threadActor) {
this.threadActor = new ThreadActor(this, null);
this.manage(this.threadActor);
}
if (!this.memoryActor) {
this.memoryActor = new MemoryActor(this.conn, this);
this.manage(this.memoryActor);
}
return {
actor: this.actorID,
consoleActor: this._consoleActor.actorID,
threadActor: this.threadActor.actorID,
memoryActor: this.memoryActor.actorID,
processID: Services.appinfo.processID,
traits: {
networkMonitor: false,
},
};
},
ensureWorkerList() {
if (!this._workerList) {
this._workerList = new WorkerDescriptorActorList(this.conn, {});
}
return this._workerList;
},
listWorkers: function() {
return this.ensureWorkerList()
.getList()
.then(actors => {
const pool = new Pool(this.conn, "workers");
for (const actor of actors) {
pool.manage(actor);
}
// Do not destroy the pool before transfering ownership to the newly created
// pool, so that we do not accidentally destroy actors that are still in use.
if (this._workerDescriptorActorPool) {
this._workerDescriptorActorPool.destroy();
}
this._workerDescriptorActorPool = pool;
this._workerList.onListChanged = this._onWorkerListChanged;
return {
from: this.actorID,
workers: actors,
};
});
},
_onWorkerListChanged: function() {
this.conn.send({ from: this.actorID, type: "workerListChanged" });
this._workerList.onListChanged = null;
},
pauseMatchingServiceWorkers(request) {
this.ensureWorkerList().workerPauser.setPauseServiceWorkers(
request.origin
);
},
destroy: function() {
if (this.isDestroyed()) {
return;
}
Resources.unwatchAllTargetResources(this);
// Notify the client that this target is being destroyed.
// So that we can destroy the target front and all its children.
this.emit("tabDetached");
Actor.prototype.destroy.call(this);
if (this.threadActor) {
this.threadActor = null;
}
// Tell the live lists we aren't watching any more.
if (this._workerList) {
this._workerList.destroy();
this._workerList = null;
}
if (this._sourcesManager) {
this._sourcesManager.destroy();
this._sourcesManager = null;
}
if (this._dbg) {
this._dbg.disable();
this._dbg = null;
}
Services.obs.removeObserver(this.destroyObserver, "xpcom-shutdown");
},
}
);
exports.ContentProcessTargetActor = ContentProcessTargetActor;
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