4fb4f3408c
This adds access to the LiveEdit API object, frame.restart(), and various breakpoint setters. The LiveEdit API still depends on the JS debugging context and blocks its removal; but it should be removed once LiveEdit is rewritten in the midterm. BUG=v8:5530 Review-Url: https://codereview.chromium.org/2503293002 Cr-Commit-Position: refs/heads/master@{#41062}
119 lines
3.7 KiB
JavaScript
119 lines
3.7 KiB
JavaScript
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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var Debug = debug.Debug;
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var LiveEdit = Debug.LiveEdit;
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unique_id = 0;
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var Generator = (function*(){}).constructor;
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function assertIteratorResult(value, done, result) {
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assertEquals({value: value, done: done}, result);
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}
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function MakeGenerator() {
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// Prevents eval script caching.
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unique_id++;
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return Generator('callback',
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"/* " + unique_id + "*/\n" +
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"yield callback();\n" +
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"return 'Cat';\n");
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}
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function MakeFunction() {
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// Prevents eval script caching.
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unique_id++;
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return Function('callback',
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"/* " + unique_id + "*/\n" +
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"callback();\n" +
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"return 'Cat';\n");
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}
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// First, try MakeGenerator with no perturbations.
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(function(){
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var generator = MakeGenerator();
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function callback() {};
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var iter = generator(callback);
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assertIteratorResult(undefined, false, iter.next());
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assertIteratorResult("Cat", true, iter.next());
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})();
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function patch(fun, from, to) {
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function debug() {
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var log = new Array();
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var script = Debug.findScript(fun);
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var pos = script.source.indexOf(from);
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try {
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LiveEdit.TestApi.ApplySingleChunkPatch(script, pos, from.length, to,
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log);
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} finally {
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print("Change log: " + JSON.stringify(log) + "\n");
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}
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}
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%ExecuteInDebugContext(debug);
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}
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// Try to edit a MakeGenerator while it's running, then again while it's
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// stopped.
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(function(){
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var generator = MakeGenerator();
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var gen_patch_attempted = false;
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function attempt_gen_patch() {
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assertFalse(gen_patch_attempted);
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gen_patch_attempted = true;
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assertThrows(function() { patch(generator, "'Cat'", "'Capybara'") },
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LiveEdit.Failure);
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};
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var iter = generator(attempt_gen_patch);
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assertIteratorResult(undefined, false, iter.next());
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// Patch should not succeed because there is a live generator activation on
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// the stack.
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assertIteratorResult("Cat", true, iter.next());
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assertTrue(gen_patch_attempted);
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// At this point one iterator is live, but closed, so the patch will succeed.
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patch(generator, "'Cat'", "'Capybara'");
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iter = generator(function(){});
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assertIteratorResult(undefined, false, iter.next());
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// Patch successful.
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assertIteratorResult("Capybara", true, iter.next());
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// Patching will fail however when a live iterator is suspended.
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iter = generator(function(){});
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assertIteratorResult(undefined, false, iter.next());
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assertThrows(function() { patch(generator, "'Capybara'", "'Tapir'") },
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LiveEdit.Failure);
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assertIteratorResult("Capybara", true, iter.next());
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// Try to patch functions with activations inside and outside generator
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// function activations. We should succeed in the former case, but not in the
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// latter.
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var fun_outside = MakeFunction();
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var fun_inside = MakeFunction();
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var fun_patch_attempted = false;
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var fun_patch_restarted = false;
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function attempt_fun_patches() {
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if (fun_patch_attempted) {
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assertFalse(fun_patch_restarted);
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fun_patch_restarted = true;
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return;
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}
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fun_patch_attempted = true;
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// Patching outside a generator activation must fail.
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assertThrows(function() { patch(fun_outside, "'Cat'", "'Cobra'") },
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LiveEdit.Failure);
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// Patching inside a generator activation may succeed.
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patch(fun_inside, "'Cat'", "'Koala'");
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}
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iter = generator(function() { return fun_inside(attempt_fun_patches) });
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assertEquals('Cat',
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fun_outside(function () {
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assertIteratorResult('Koala', false, iter.next());
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assertTrue(fun_patch_restarted);
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}));
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})();
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