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+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* 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/. */
+
+/*
+ * This is the js module for Debugger. Import it like so:
+ * const { addDebuggerToGlobal } = ChromeUtils.importESModule(
+ * "resource://gre/modules/jsdebugger.sys.mjs"
+ * );
+ * addDebuggerToGlobal(globalThis);
+ *
+ * This will create a 'Debugger' object, which provides an interface to debug
+ * JavaScript code running in other compartments in the same process, on the
+ * same thread.
+ *
+ * For documentation on the API, see:
+ * https://developer.mozilla.org/en-US/docs/Tools/Debugger-API
+ */
+
+const init = Cc["@mozilla.org/jsdebugger;1"].createInstance(Ci.IJSDebugger);
+
+export function addDebuggerToGlobal(global) {
+ init.addClass(global);
+ initPromiseDebugging(global);
+}
+
+// Defines the Debugger in a sandbox global in a separate compartment. This
+// ensures the debugger and debuggee are in different compartments.
+export function addSandboxedDebuggerToGlobal(global) {
+ const sb = Cu.Sandbox(global, { freshCompartment: true });
+ addDebuggerToGlobal(sb);
+ global.Debugger = sb.Debugger;
+}
+
+function initPromiseDebugging(global) {
+ if (global.Debugger.Object.prototype.PromiseDebugging) {
+ return;
+ }
+
+ // If the PromiseDebugging object doesn't have all legacy functions, we're
+ // using the new accessors on Debugger.Object already.
+ if (!PromiseDebugging.getDependentPromises) {
+ return;
+ }
+
+ // Otherwise, polyfill them using PromiseDebugging.
+ global.Debugger.Object.prototype.PromiseDebugging = PromiseDebugging;
+ global.eval(polyfillSource);
+}
+
+const polyfillSource = `
+ Object.defineProperty(Debugger.Object.prototype, "promiseState", {
+ get() {
+ const state = this.PromiseDebugging.getState(this.unsafeDereference());
+ return {
+ state: state.state,
+ value: this.makeDebuggeeValue(state.value),
+ reason: this.makeDebuggeeValue(state.reason)
+ };
+ }
+ });
+ Object.defineProperty(Debugger.Object.prototype, "promiseLifetime", {
+ get() {
+ return this.PromiseDebugging.getPromiseLifetime(this.unsafeDereference());
+ }
+ });
+ Object.defineProperty(Debugger.Object.prototype, "promiseTimeToResolution", {
+ get() {
+ return this.PromiseDebugging.getTimeToSettle(this.unsafeDereference());
+ }
+ });
+ Object.defineProperty(Debugger.Object.prototype, "promiseDependentPromises", {
+ get() {
+ let promises = this.PromiseDebugging.getDependentPromises(this.unsafeDereference());
+ return promises.map(p => this.makeDebuggeeValue(p));
+ }
+ });
+ Object.defineProperty(Debugger.Object.prototype, "promiseAllocationSite", {
+ get() {
+ return this.PromiseDebugging.getAllocationStack(this.unsafeDereference());
+ }
+ });
+ Object.defineProperty(Debugger.Object.prototype, "promiseResolutionSite", {
+ get() {
+ let state = this.promiseState.state;
+ if (state === "fulfilled") {
+ return this.PromiseDebugging.getFullfillmentStack(this.unsafeDereference());
+ } else {
+ return this.PromiseDebugging.getRejectionStack(this.unsafeDereference());
+ }
+ }
+ });
+`;