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94 lines
3.2 KiB
JavaScript
94 lines
3.2 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* This is the js module for Debugger. Import it like so:
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* const { addDebuggerToGlobal } = ChromeUtils.importESModule(
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* "resource://gre/modules/jsdebugger.sys.mjs"
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* );
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* addDebuggerToGlobal(globalThis);
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*
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* This will create a 'Debugger' object, which provides an interface to debug
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* JavaScript code running in other compartments in the same process, on the
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* same thread.
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*
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* For documentation on the API, see:
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* https://developer.mozilla.org/en-US/docs/Tools/Debugger-API
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*/
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const init = Cc["@mozilla.org/jsdebugger;1"].createInstance(Ci.IJSDebugger);
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export function addDebuggerToGlobal(global) {
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init.addClass(global);
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initPromiseDebugging(global);
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}
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// Defines the Debugger in a sandbox global in a separate compartment. This
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// ensures the debugger and debuggee are in different compartments.
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export function addSandboxedDebuggerToGlobal(global) {
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const sb = Cu.Sandbox(global, { freshCompartment: true });
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addDebuggerToGlobal(sb);
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global.Debugger = sb.Debugger;
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}
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function initPromiseDebugging(global) {
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if (global.Debugger.Object.prototype.PromiseDebugging) {
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return;
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}
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// If the PromiseDebugging object doesn't have all legacy functions, we're
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// using the new accessors on Debugger.Object already.
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if (!PromiseDebugging.getDependentPromises) {
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return;
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}
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// Otherwise, polyfill them using PromiseDebugging.
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global.Debugger.Object.prototype.PromiseDebugging = PromiseDebugging;
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global.eval(polyfillSource);
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}
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const polyfillSource = `
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Object.defineProperty(Debugger.Object.prototype, "promiseState", {
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get() {
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const state = this.PromiseDebugging.getState(this.unsafeDereference());
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return {
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state: state.state,
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value: this.makeDebuggeeValue(state.value),
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reason: this.makeDebuggeeValue(state.reason)
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};
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}
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});
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Object.defineProperty(Debugger.Object.prototype, "promiseLifetime", {
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get() {
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return this.PromiseDebugging.getPromiseLifetime(this.unsafeDereference());
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}
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});
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Object.defineProperty(Debugger.Object.prototype, "promiseTimeToResolution", {
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get() {
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return this.PromiseDebugging.getTimeToSettle(this.unsafeDereference());
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}
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});
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Object.defineProperty(Debugger.Object.prototype, "promiseDependentPromises", {
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get() {
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let promises = this.PromiseDebugging.getDependentPromises(this.unsafeDereference());
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return promises.map(p => this.makeDebuggeeValue(p));
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}
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});
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Object.defineProperty(Debugger.Object.prototype, "promiseAllocationSite", {
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get() {
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return this.PromiseDebugging.getAllocationStack(this.unsafeDereference());
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}
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});
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Object.defineProperty(Debugger.Object.prototype, "promiseResolutionSite", {
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get() {
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let state = this.promiseState.state;
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if (state === "fulfilled") {
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return this.PromiseDebugging.getFullfillmentStack(this.unsafeDereference());
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} else {
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return this.PromiseDebugging.getRejectionStack(this.unsafeDereference());
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}
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}
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});
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`;
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