Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 285 insertions, 0 deletions

diff --git a/devtools/client/fronts/thread.js b/devtools/client/fronts/thread.js
new file mode 100644
index 0000000000..f5d05aa868
--- /dev/null
+++ b/devtools/client/fronts/thread.js
@@ -0,0 +1,285 @@
+/* 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";
+
+const { ThreadStateTypes } = require("resource://devtools/client/constants.js");
+const {
+  FrontClassWithSpec,
+  registerFront,
+} = require("resource://devtools/shared/protocol.js");
+
+const { threadSpec } = require("resource://devtools/shared/specs/thread.js");
+
+loader.lazyRequireGetter(
+  this,
+  "ObjectFront",
+  "resource://devtools/client/fronts/object.js",
+  true
+);
+loader.lazyRequireGetter(
+  this,
+  "FrameFront",
+  "resource://devtools/client/fronts/frame.js"
+);
+loader.lazyRequireGetter(
+  this,
+  "SourceFront",
+  "resource://devtools/client/fronts/source.js",
+  true
+);
+
+/**
+ * Creates a thread front for the remote debugging protocol server. This client
+ * is a front to the thread actor created in the server side, hiding the
+ * protocol details in a traditional JavaScript API.
+ *
+ * @param client DevToolsClient
+ * @param actor string
+ *        The actor ID for this thread.
+ */
+class ThreadFront extends FrontClassWithSpec(threadSpec) {
+  constructor(client, targetFront, parentFront) {
+    super(client, targetFront, parentFront);
+    this.client = client;
+    this._pauseGrips = {};
+    this._threadGrips = {};
+    // Note that this isn't matching ThreadActor state field.
+    // ThreadFront is only using two values: paused or attached.
+    this._state = "attached";
+
+    this._beforePaused = this._beforePaused.bind(this);
+    this._beforeResumed = this._beforeResumed.bind(this);
+    this.before("paused", this._beforePaused);
+    this.before("resumed", this._beforeResumed);
+    this.targetFront.on("will-navigate", this._onWillNavigate.bind(this));
+    // Attribute name from which to retrieve the actorID out of the target actor's form
+    this.formAttributeName = "threadActor";
+  }
+
+  get state() {
+    return this._state;
+  }
+
+  get paused() {
+    return this._state === "paused";
+  }
+
+  get actor() {
+    return this.actorID;
+  }
+
+  _assertPaused(command) {
+    if (!this.paused) {
+      throw Error(
+        command + " command sent while not paused. Currently " + this._state
+      );
+    }
+  }
+
+  getFrames(start, count) {
+    return super.frames(start, count);
+  }
+
+  /**
+   * Resume a paused thread. If the optional limit parameter is present, then
+   * the thread will also pause when that limit is reached.
+   *
+   * @param [optional] object limit
+   *        An object with a type property set to the appropriate limit (next,
+   *        step, or finish) per the remote debugging protocol specification.
+   *        Use null to specify no limit.
+   */
+  async _doResume(resumeLimit, frameActorID) {
+    this._assertPaused("resume");
+
+    // Put the client in a tentative "resuming" state so we can prevent
+    // further requests that should only be sent in the paused state.
+    this._previousState = this._state;
+    this._state = "resuming";
+    try {
+      await super.resume(resumeLimit, frameActorID);
+    } catch (e) {
+      if (this._state == "resuming") {
+        // There was an error resuming, update the state to the new one
+        // reported by the server, if given (only on wrongState), otherwise
+        // reset back to the previous state.
+        if (e.state) {
+          this._state = ThreadStateTypes[e.state];
+        } else {
+          this._state = this._previousState;
+        }
+      }
+    }
+
+    delete this._previousState;
+  }
+
+  /**
+   * Resume a paused thread.
+   */
+  resume() {
+    return this._doResume(null);
+  }
+
+  /**
+   * Resume then pause without stepping.
+   *
+   */
+  resumeThenPause() {
+    return this._doResume({ type: "break" });
+  }
+
+  /**
+   * Step over a function call.
+   */
+  stepOver(frameActorID) {
+    return this._doResume({ type: "next" }, frameActorID);
+  }
+
+  /**
+   * Step into a function call.
+   */
+  stepIn(frameActorID) {
+    return this._doResume({ type: "step" }, frameActorID);
+  }
+
+  /**
+   * Step out of a function call.
+   */
+  stepOut(frameActorID) {
+    return this._doResume({ type: "finish" }, frameActorID);
+  }
+
+  /**
+   * Restart selected frame.
+   */
+  restart(frameActorID) {
+    return this._doResume({ type: "restart" }, frameActorID);
+  }
+
+  /**
+   * Immediately interrupt a running thread.
+   */
+  interrupt() {
+    return this._doInterrupt(null);
+  }
+
+  /**
+   * Pause execution right before the next JavaScript bytecode is executed.
+   */
+  breakOnNext() {
+    return this._doInterrupt("onNext");
+  }
+
+  /**
+   * Interrupt a running thread.
+   */
+  _doInterrupt(when) {
+    return super.interrupt(when);
+  }
+
+  /**
+   * Request the loaded sources for the current thread.
+   */
+  async getSources() {
+    let sources = [];
+    try {
+      sources = await super.sources();
+    } catch (e) {
+      // we may have closed the connection
+      console.log(`getSources failed. Connection may have closed: ${e}`);
+    }
+    return { sources };
+  }
+
+  /**
+   * Return a ObjectFront object for the given object grip.
+   *
+   * @param grip object
+   *        A pause-lifetime object grip returned by the protocol.
+   */
+  pauseGrip(grip) {
+    if (grip.actor in this._pauseGrips) {
+      return this._pauseGrips[grip.actor];
+    }
+
+    const objectFront = new ObjectFront(
+      this.conn,
+      this.targetFront,
+      this,
+      grip
+    );
+    this._pauseGrips[grip.actor] = objectFront;
+    return objectFront;
+  }
+
+  /**
+   * Clear and invalidate all the grip fronts from the given cache.
+   *
+   * @param gripCacheName
+   *        The property name of the grip cache we want to clear.
+   */
+  _clearObjectFronts(gripCacheName) {
+    for (const id in this[gripCacheName]) {
+      this[gripCacheName][id].valid = false;
+    }
+    this[gripCacheName] = {};
+  }
+
+  /**
+   * Invalidate pause-lifetime grip clients and clear the list of current grip
+   * clients.
+   */
+  _clearPauseGrips() {
+    this._clearObjectFronts("_pauseGrips");
+  }
+
+  _beforePaused(packet) {
+    this._state = "paused";
+    this._onThreadState(packet);
+  }
+
+  _beforeResumed() {
+    this._state = "attached";
+    this._onThreadState(null);
+    this.unmanageChildren(FrameFront);
+  }
+
+  _onWillNavigate() {
+    this.unmanageChildren(SourceFront);
+  }
+
+  /**
+   * Handle thread state change by doing necessary cleanup
+   */
+  _onThreadState(packet) {
+    // The debugger UI may not be initialized yet so we want to keep
+    // the packet around so it knows what to pause state to display
+    // when it's initialized
+    this._lastPausePacket = packet;
+    this._clearPauseGrips();
+  }
+
+  getLastPausePacket() {
+    return this._lastPausePacket;
+  }
+
+  /**
+   * Return an instance of SourceFront for the given source actor form.
+   */
+  source(form) {
+    if (form.actor in this._threadGrips) {
+      return this._threadGrips[form.actor];
+    }
+
+    const sourceFront = new SourceFront(this.client, form);
+    this.manage(sourceFront);
+    this._threadGrips[form.actor] = sourceFront;
+    return sourceFront;
+  }
+}
+
+exports.ThreadFront = ThreadFront;
+registerFront(ThreadFront);