feat: add first commit

.gitignore

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+js/
+compile
+libmozglue.dylib
+libmozjs-52.dylib
+.idea/
+
+/vendor/
+composer.lock

a.txt

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+

composer.json

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+{
+    "name": "irelance/jsc-decompile-mozjs-34",
+    "license": "proprietary",
+    "type": "project",
+    "authors": [
+        {
+            "name": "irelance",
+            "email": "[email protected]"
+        }
+    ],
+    "autoload": {
+        "psr-4": {
+            "Irelance\\Mozjs34\\": "src"
+        }
+    },
+    "require": {
+        "php": ">=7.0.0"
+    }
+}

run.php

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+<?php
+/**
+ * Created by PhpStorm.
+ * User: irelance
+ * Date: 2017/10/1
+ * Time: 上午10:47
+ */
+include 'vendor/autoload.php';
+
+
+$decompile = new Irelance\Mozjs34\Decompile($argv[1]);
+$decompile->run();
+$decompile->printOpcodes();

src/Context.php

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+<?php
+
+/**
+ * Created by PhpStorm.
+ * User: irelance
+ * Date: 2017/10/1
+ * Time: 下午3:25
+ */
+namespace Irelance\Mozjs34;
+
+class Context
+{
+    protected $summaries = [];
+    protected $operations = [];
+    protected $nodes = [];
+    protected $atoms = [];
+    protected $consts = [];
+    protected $objects = [];
+    protected $regexps = [];
+    protected $tryNotes = [];
+    protected $scopeNotes = [];
+    protected $hasLazyScript;
+
+    public function addSummary($key, $value)
+    {
+        if (isset($this->summaries[$key])) {
+            return false;
+        }
+        $this->summaries[$key] = $value;
+        return true;
+    }
+
+    public function addOperation($op, array $bytes)
+    {
+        $this->operations[] = ['id' => $op, 'params' => $bytes];
+    }
+
+    public function addNode($node)
+    {
+        $this->nodes[] = $node;
+    }
+
+    public function addAtom($atom)
+    {
+        $this->atoms[] = $atom;
+    }
+
+    public function addConst($const)
+    {
+        $this->consts[] = $const;
+    }
+
+    public function addObject($classKind, array $extra)
+    {
+        $this->objects[] = array_merge($extra, ['classKind' => $classKind]);
+    }
+
+    public function addRegexp($source, $flagsword)
+    {
+        $this->regexps[]=[
+            'source'=>$source,
+            'flagsword'=>$flagsword,
+        ];
+    }
+
+    public function addTryNote($kind, $stackDepth, $start, $length)
+    {
+        $this->tryNotes[] = ['kind' => $kind, 'stackDepth' => $stackDepth, 'start' => $start, 'length' => $length];
+    }
+
+    public function addScopeNote($index, $start, $length, $parent)
+    {
+        $this->tryNotes[$index] = ['parent' => $parent, 'start' => $start, 'length' => $length];
+    }
+
+    public function addHasLazyScript($packedFields)
+    {
+        $this->hasLazyScript = $packedFields;
+    }
+
+    public function getSummary($key)
+    {
+        return $this->summaries[$key];
+    }
+
+    public function getSummaries()
+    {
+        return $this->summaries;
+    }
+
+    public function getOperations()
+    {
+        return $this->operations;
+    }
+
+    public function getAtoms()
+    {
+        return $this->atoms;
+    }
+}

src/Decompile.php

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+<?php
+
+/**
+ * Created by PhpStorm.
+ * User: irelance
+ * Date: 2017/9/20
+ * Time: 上午8:04
+ *
+ * js/src/jsscript.h
+ * js/src/vm/Xdr.h
+ */
+namespace Irelance\Mozjs34;
+
+class Decompile
+{
+    use Xdr\Common;
+    use Xdr\Script;
+    use Xdr\Atom;
+    use Xdr\Object;
+    use Xdr\Scope;
+    private $fp;
+    private $CRLF;
+    protected $parseIndex = 0;
+
+    protected $buildId = '';
+    protected $contexts = [];
+
+    public $bytecodes = [];
+    public $bytecodeLength = 0;
+
+    public function __construct($filename)
+    {
+        $this->fp = fopen($filename, 'rb');
+        $this->CRLF = php_sapi_name() == 'cli' ? "\n" : "<hr>";
+        $this->init();
+    }
+
+    public function __destruct()
+    {
+        fclose($this->fp);
+    }
+
+    public function init()
+    {
+        $i = 0;
+        while (!feof($this->fp)) {
+            $c = fgetc($this->fp);
+            $this->bytecodes[$i] = ord($c);
+            $i++;
+        }
+        $this->bytecodeLength = count($this->bytecodes);
+    }
+
+    public function printOpcodes()
+    {
+        /** @var Context $context * */
+        foreach ($this->contexts as $index => $context) {
+            $opcodes = $context->getOperations();
+            echo '------------------' . $index . '------------------', $this->CRLF;
+            foreach ($opcodes as $opcode) {
+                $op = Constant::_Opcode[$opcode['id']];
+                echo $op['name'], ' ', $op['len'], ' ', $op['use'], ' ', $op['def'], ' :';
+                echo implode(', ', $opcode['params']), $this->CRLF;
+            }
+            echo '----------------------------------------', $this->CRLF;
+        }
+    }
+
+    public function printAtoms()
+    {
+        /** @var Context $context * */
+        foreach ($this->contexts as $index => $context) {
+            $atoms = $context->getAtoms();
+            echo '------------------' . $index . '------------------', $this->CRLF;
+            echo implode(' ', $atoms), $this->CRLF;
+            echo '----------------------------------------', $this->CRLF;
+        }
+    }
+
+    public function printSummaries()
+    {
+        /** @var Context $context * */
+        foreach ($this->contexts as $index => $context) {
+            $summaries = $context->getSummaries();
+            echo '------------------' . $index . '------------------', $this->CRLF;
+            foreach ($summaries as $key => $val) {
+                echo $key, ': ', $val, $this->CRLF;
+            }
+            echo '----------------------------------------', $this->CRLF;
+        }
+    }
+
+    protected function parserVersion()
+    {
+        $this->parseIndex = 0;
+        $bytecodeVer = $this->todec();
+        return $bytecodeVer;
+    }
+
+    public function run()
+    {
+        $this->parserVersion();
+        $this->XDRScript();
+        echo '----------------ByteCode---------------', $this->CRLF;
+        echo 'file size :', $this->bytecodeLength, $this->CRLF;
+        echo 'parse size :', $this->parseIndex, $this->CRLF;
+        echo '---------------------------------------', $this->CRLF;
+    }
+}

src/Xdr/Atom.php

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+<?php
+/**
+ * Created by PhpStorm.
+ * User: irelance
+ * Date: 2017/10/10
+ * Time: 上午11:30
+ */
+
+namespace Irelance\Mozjs34\Xdr;
+
+trait Atom
+{
+    protected function getLatin1Chars($length)
+    {
+        $end = $this->parseIndex + $length;
+        $atom = '';
+        for (; $this->parseIndex < $end; $this->parseIndex++) {
+            $atom .= chr($this->bytecodes[$this->parseIndex]);
+        }
+        return $atom;
+    }
+
+    protected function getTwoByteChar()
+    {
+        $char = '\u' . dechex($this->bytecodes[$this->parseIndex + 1]) . dechex($this->bytecodes[$this->parseIndex]);
+        $this->parseIndex += 2;
+        return $char;
+    }
+
+    protected function getTwoByteChars($length)
+    {
+        $atom = '';
+        for ($i = 0; $i < $length; $i++) {
+            $atom .= $this->getTwoByteChar();
+        }
+        return json_decode('"' . $atom . '"');
+    }
+
+    public function XDRAtom()
+    {
+        $lengthAndEncoding = $this->todec();
+        $hasLatin1Chars = $lengthAndEncoding & 1;
+        $length = $lengthAndEncoding >> 1;
+        if ($hasLatin1Chars) {
+            $atom = $this->getLatin1Chars($length);
+        } else {
+            $atom = $this->getTwoByteChars($length);
+        }
+        return $atom;
+    }
+}