Merge V8 5.3.332.45. DO NOT MERGE
Test: Manual
FPIIM-449
Change-Id: Id3254828b068abdea3cb10442e0172a8c9a98e03
(cherry picked from commit 13e2dadd00298019ed862f2b2fc5068bba730bcf)
diff --git a/test/mjsunit/harmony/debug-async-liveedit.js b/test/mjsunit/harmony/debug-async-liveedit.js
new file mode 100644
index 0000000..c651ddb
--- /dev/null
+++ b/test/mjsunit/harmony/debug-async-liveedit.js
@@ -0,0 +1,133 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-async-await
+// Flags: --expose-debug-as debug --allow-natives-syntax --ignition-generators
+
+var Debug = debug.Debug;
+var LiveEdit = Debug.LiveEdit;
+
+unique_id = 0;
+
+var AsyncFunction = (async function(){}).constructor;
+
+function assertPromiseValue(value, promise) {
+ promise.then(resolve => {
+ went = true;
+ if (resolve !== value) {
+ print(`expected ${value} found ${resolve}`);
+ quit(1);
+ }
+ }, reject => {
+ print(`rejected ${reject}`);
+ quit(1);
+ });
+}
+
+function MakeAsyncFunction() {
+ // Prevents eval script caching.
+ unique_id++;
+ return AsyncFunction('callback',
+ "/* " + unique_id + "*/\n" +
+ "await callback();\n" +
+ "return 'Cat';\n");
+}
+
+function MakeFunction() {
+ // Prevents eval script caching.
+ unique_id++;
+ return Function('callback',
+ "/* " + unique_id + "*/\n" +
+ "callback();\n" +
+ "return 'Cat';\n");
+}
+
+// First, try MakeGenerator with no perturbations.
+(function(){
+ var asyncfn = MakeAsyncFunction();
+ function callback() {};
+ var promise = asyncfn(callback);
+ assertPromiseValue('Cat', promise);
+})();
+
+function patch(fun, from, to) {
+ function debug() {
+ var log = new Array();
+ var script = Debug.findScript(fun);
+ var pos = script.source.indexOf(from);
+ print(`pos ${pos}`);
+ try {
+ LiveEdit.TestApi.ApplySingleChunkPatch(script, pos, from.length, to,
+ log);
+ } finally {
+ print("Change log: " + JSON.stringify(log) + "\n");
+ }
+ }
+ %ExecuteInDebugContext(debug);
+}
+
+// Try to edit a MakeAsyncFunction while it's running, then again while it's
+// stopped.
+(function(){
+ var asyncfn = MakeAsyncFunction();
+
+ var patch_attempted = false;
+ function attempt_patch() {
+ assertFalse(patch_attempted);
+ patch_attempted = true;
+ assertThrows(function() { patch(asyncfn, "'Cat'", "'Capybara'") },
+ LiveEdit.Failure);
+ };
+ var promise = asyncfn(attempt_patch);
+ // Patch should not succeed because there is a live async function activation
+ // on the stack.
+ assertPromiseValue("Cat", promise);
+ assertTrue(patch_attempted);
+
+ %RunMicrotasks();
+
+ // At this point one iterator is live, but closed, so the patch will succeed.
+ patch(asyncfn, "'Cat'", "'Capybara'");
+ promise = asyncfn(function(){});
+ // Patch successful.
+ assertPromiseValue("Capybara", promise);
+
+ // Patching will fail however when an async function is suspended.
+ var resolve;
+ promise = asyncfn(function(){return new Promise(function(r){resolve = r})});
+ assertThrows(function() { patch(asyncfn, "'Capybara'", "'Tapir'") },
+ LiveEdit.Failure);
+ resolve();
+ assertPromiseValue("Capybara", promise);
+
+ // Try to patch functions with activations inside and outside async
+ // function activations. We should succeed in the former case, but not in the
+ // latter.
+ var fun_outside = MakeFunction();
+ var fun_inside = MakeFunction();
+ var fun_patch_attempted = false;
+ var fun_patch_restarted = false;
+ function attempt_fun_patches() {
+ if (fun_patch_attempted) {
+ assertFalse(fun_patch_restarted);
+ fun_patch_restarted = true;
+ return;
+ }
+ fun_patch_attempted = true;
+ // Patching outside an async function activation must fail.
+ assertThrows(function() { patch(fun_outside, "'Cat'", "'Cobra'") },
+ LiveEdit.Failure);
+ // Patching inside an async function activation may succeed.
+ patch(fun_inside, "'Cat'", "'Koala'");
+ }
+ promise = asyncfn(function() { return fun_inside(attempt_fun_patches) });
+ assertEquals('Cat',
+ fun_outside(function () {
+ assertPromiseValue('Capybara', promise);
+ assertTrue(fun_patch_restarted);
+ assertTrue(fun_inside.toString().includes("'Koala'"));
+ }));
+})();
+
+%RunMicrotasks();