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1 // Copyright 2016 the V8 project authors. All rights reserved. | 1 // Copyright 2016 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // TODO: add test API implementation. | 5 "use strict"; |
| 6 |
| 7 // If true, prints all messages sent and received by inspector. |
| 8 const printProtocolMessages = false; |
| 9 |
| 10 // The active wrapper instance. |
| 11 let activeWrapper = undefined; |
| 12 |
| 13 // Receiver function called by inspector, delegating to active wrapper. |
| 14 function receive(message) { |
| 15 activeWrapper.receiveMessage(message); |
| 16 } |
| 17 |
| 18 // TODO(jgruber): Determine which of these are still required and possible. |
| 19 // Debug events which can occur in the V8 JavaScript engine. |
| 20 const DebugEvent = { Break: 1, |
| 21 Exception: 2, |
| 22 NewFunction: 3, |
| 23 BeforeCompile: 4, |
| 24 AfterCompile: 5, |
| 25 CompileError: 6, |
| 26 AsyncTaskEvent: 7 }; |
| 27 |
| 28 class DebugWrapper { |
| 29 constructor() { |
| 30 // Message dictionary storing {id, message} pairs. |
| 31 this.receivedMessages = {}; |
| 32 |
| 33 // Each message dispatched by the Debug wrapper is assigned a unique number |
| 34 // using nextMessageId. |
| 35 this.nextMessageId = 0; |
| 36 |
| 37 // The listener method called on certain events. |
| 38 this.listener = () => undefined; |
| 39 |
| 40 // Register as the active wrapper. |
| 41 assertTrue(activeWrapper === undefined); |
| 42 activeWrapper = this; |
| 43 } |
| 44 |
| 45 enable() { |
| 46 const {msgid, msg} = this.createMessage("Debugger.enable"); |
| 47 this.sendMessage(msg); |
| 48 assertTrue(this.receivedMessages[msgid] !== undefined); |
| 49 } |
| 50 |
| 51 disable() { |
| 52 const {msgid, msg} = this.createMessage("Debugger.disable"); |
| 53 this.sendMessage(msg); |
| 54 assertTrue(this.receivedMessages[msgid] !== undefined); |
| 55 } |
| 56 |
| 57 setListener(listener) { |
| 58 this.listener = listener; |
| 59 } |
| 60 |
| 61 // --- Internal methods. ----------------------------------------------------- |
| 62 |
| 63 getNextMessageId() { |
| 64 return this.nextMessageId++; |
| 65 } |
| 66 |
| 67 createMessage(method, params) { |
| 68 const id = this.getNextMessageId(); |
| 69 const msg = JSON.stringify({ |
| 70 id: id, |
| 71 method: method, |
| 72 params: params, |
| 73 }); |
| 74 return {msgid: id, msg: msg}; |
| 75 } |
| 76 |
| 77 receiveMessage(message) { |
| 78 if (printProtocolMessages) print(message); |
| 79 |
| 80 const parsedMessage = JSON.parse(message); |
| 81 if (parsedMessage.id !== undefined) { |
| 82 this.receivedMessages[parsedMessage.id] = parsedMessage; |
| 83 } |
| 84 |
| 85 this.dispatchMessage(parsedMessage); |
| 86 } |
| 87 |
| 88 sendMessage(message) { |
| 89 if (printProtocolMessages) print(message); |
| 90 send(message); |
| 91 } |
| 92 |
| 93 // --- Message handlers. ----------------------------------------------------- |
| 94 |
| 95 dispatchMessage(message) { |
| 96 const method = message.method; |
| 97 if (method == "Debugger.scriptParsed") { |
| 98 this.handleDebuggerScriptParsed(message); |
| 99 } |
| 100 } |
| 101 |
| 102 handleDebuggerScriptParsed(message) { |
| 103 const params = message.params; |
| 104 let eventData = { scriptId : params.scriptId |
| 105 , eventType : DebugEvent.AfterCompile |
| 106 } |
| 107 |
| 108 // TODO(jgruber): Arguments as needed. Still completely missing exec_state, |
| 109 // and eventData used to contain the script mirror instead of its id. |
| 110 this.listener(DebugEvent.AfterCompile, undefined, eventData, undefined); |
| 111 } |
| 112 } |
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