git ssb - Implement a proper debugInterface with print and printHex · wanderer🌟/js-primea-hypervisor@d48321af

Alex Beregszaszi committed on 8/4/2016, 12:13:36 AM
Parent: 0c67dbd7d1ebd5df858985a411d801af32110ab8

debugInterface.jsView
		@@ -1,16 +1,35 @@
1	1	/**
2	2	* Debug Interface
3	3	* This expose some functions that can help with debugging wast
4	4	*/
5		-const Interface = require('./interface.js')
6		-let MOD
7	5
8		-module.exports = class DebugInterface extends Interface {
9		- debugPrint (a, b) {
10		- console.log(a)
	6	+// This is ASCII only
	7	+function Uint8ArrayToString (input) {
	8	+ return String.fromCharCode.apply(null, input)
	9	+}
	10	+
	11	+function Uint8ArrayToHexString (input) {
	12	+ var ret = ''
	13	+ for (var i = 0; i < input.length; i++) {
	14	+ ret += input[i].toString(16)
11	15	}
	16	+ return ret
	17	+}
12	18
13		- memPrint () {
14		- console.log((new Uint8Array(MOD.exports.memory)).toString())
	19	+module.exports = class DebugInterface {
	20	+ setModule (mod) {
	21	+ this.module = mod
15	22	}
	23	+
	24	+ get exportTable () {
	25	+ return {
	26	+ 'print': function (offset, length) {
	27	+ console.log(`<DEBUG(str): ${Uint8ArrayToString(new Uint8Array(this.module.exports.memory, offset, length))}>`)
	28	+ }.bind(this),
	29	+
	30	+ 'printHex': function (offset, length) {
	31	+ console.log(`<DEBUG(hex): ${Uint8ArrayToHexString(new Uint8Array(this.module.exports.memory, offset, length))}>`)
	32	+ }.bind(this)
	33	+ }
	34	+ }
16	35	}

index.jsView
		@@ -13,25 +13,33 @@
13	13	*/
14	14
15	15	// The Kernel Exposes this Interface to VM instances it makes
16	16	const Interface = require('./interface.js')
	17	+
17	18	// The Kernel Stores all of its state in the Environment. The Interface is used
18	19	// to by the VM to retrive infromation from the Environment.
19	20	const Environment = require('./environment.js')
20	21
	22	+const DebugInterface = require('./debugInterface.js')
	23	+
21	24	module.exports = class Kernal {
22	25	// runs some code in the VM
23	26	constructor (environment = new Environment()) {
24	27	this.environment = environment
25	28	}
26	29
27	30	// handles running code.
28	31	static codeHandler (code, ethInterface = new Interface(new Environment())) {
	32	+ const debugInterface = new DebugInterface()
	33	+
29	34	const instance = Wasm.instantiateModule(code, {
30		- 'ethereum': ethInterface.exportTable
	35	+ 'ethereum': ethInterface.exportTable,
	36	+ 'debug': debugInterface.exportTable
31	37	})
32	38
33	39	ethInterface.setModule(instance)
	40	+ debugInterface.setModule(instance)
	41	+
34	42	if (instance.exports.main) {
35	43	instance.exports.main()
36	44	}
37	45	return instance

tests/interfaceRunner.jsView
		@@ -5,8 +5,9 @@
5	5
6	6	const Kernel = require('../index.js')
7	7	const Environment = require('../environment.js')
8	8	const Interface = require('../interface.js')
	9	+const DebugInterface = require('../debugInterface.js')
9	10	const dir = __dirname + '/interface'
10	11	// get the test names
11	12	let tests = fs.readdirSync(dir).filter((file) => file.endsWith('.wast'))
12	13	// tests = ['balance.wast']
		@@ -24,12 +25,17 @@
24	25	const environment = new Environment(envData)
25	26	environment.parent = ethereum
26	27	const testContract = new Kernel(environment)
27	28	const ethInterface = new Interface(environment, testContract)
	29	+ const debugInterface = new DebugInterface()
28	30
29	31	try {
30		- const mod = Wasm.instantiateModule(buffer, { 'ethereum': ethInterface.exportTable })
	32	+ const mod = Wasm.instantiateModule(buffer, {
	33	+ 'ethereum': ethInterface.exportTable,
	34	+ 'debug': debugInterface.exportTable
	35	+ })
31	36	ethInterface.setModule(mod)
	37	+ debugInterface.setModule(mod)
32	38	mod.exports.test()
33	39	} catch (e) {
34	40	t.fail()
35	41	console.error('FAIL')

wanderer🌟 / js-primea-hypervisor