1 files changed, 95 insertions, 0 deletions
diff --git a/devtools/server/connectors/js-process-actor/target-watchers/process.sys.mjs b/devtools/server/connectors/js-process-actor/target-watchers/process.sys.mjs
new file mode 100644
index 0000000000..c2b6dd807c
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+++ b/devtools/server/connectors/js-process-actor/target-watchers/process.sys.mjs
@@ -0,0 +1,95 @@
+/* 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/. */
+
+import { ContentProcessWatcherRegistry } from "resource://devtools/server/connectors/js-process-actor/ContentProcessWatcherRegistry.sys.mjs";
+
+function watch() {
+  // There is nothing to watch. This JS Process Actor will automatically be spawned
+  // for each new DOM Process.
+}
+function unwatch() {}
+
+function createTargetsForWatcher(watcherDataObject) {
+  // Always ignore the parent process. A special WindowGlobal target actor will be spawned.
+  if (ChromeUtils.domProcessChild.childID == 0) {
+    return;
+  }
+
+  createContentProcessTargetActor(watcherDataObject);
+}
+
+/**
+ * Instantiate a content process target actor for the current process
+ * and for a given watcher actor.
+ *
+ * @param {Object} watcherDataObject
+ */
+function createContentProcessTargetActor(watcherDataObject) {
+  logDOMProcess(
+    ChromeUtils.domProcessChild,
+    "Instantiate ContentProcessTarget"
+  );
+
+  const { connection, loader } =
+    ContentProcessWatcherRegistry.getOrCreateConnectionForWatcher(
+      watcherDataObject.watcherActorID
+    );
+
+  const { ContentProcessTargetActor } = loader.require(
+    "devtools/server/actors/targets/content-process"
+  );
+
+  // Create the actual target actor.
+  const targetActor = new ContentProcessTargetActor(connection, {
+    sessionContext: watcherDataObject.sessionContext,
+  });
+
+  ContentProcessWatcherRegistry.onNewTargetActor(
+    watcherDataObject,
+    targetActor
+  );
+}
+
+function destroyTargetsForWatcher(watcherDataObject, options) {
+  // Unregister and destroy the existing target actors for this target type
+  const actorsToDestroy = watcherDataObject.actors.filter(
+    actor => actor.targetType == "process"
+  );
+  watcherDataObject.actors = watcherDataObject.actors.filter(
+    actor => actor.targetType != "process"
+  );
+
+  for (const actor of actorsToDestroy) {
+    ContentProcessWatcherRegistry.destroyTargetActor(
+      watcherDataObject,
+      actor,
+      options
+    );
+  }
+}
+
+// If true, log info about DOMProcess's being created.
+const DEBUG = false;
+
+/**
+ * Print information about operation being done against each content process.
+ *
+ * @param {nsIDOMProcessChild} domProcessChild
+ *        The process for which we should log a message.
+ * @param {String} message
+ *        Message to log.
+ */
+function logDOMProcess(domProcessChild, message) {
+  if (!DEBUG) {
+    return;
+  }
+  dump(" [pid:" + domProcessChild + "] " + message + "\n");
+}
+
+export const ProcessTargetWatcher = {
+  watch,
+  unwatch,
+  createTargetsForWatcher,
+  destroyTargetsForWatcher,
+};