xcache
/
xcache
1
0
Fork 0
Code Releases Activity
Browse Source

Disassembler: can now recover compile time constant 

git-svn-id: svn://svn.lighttpd.net/xcache/trunk@1302 c26eb9a1-5813-0410-bd6c-c2e55f420ca7
3.1
Xuefer 8 years ago
parent
31c0487196
commit
beb0ee22d1
2 changed files with 62 additions and 23 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 74
      lib/Decompiler.class.php
  2. 11
      mod_disassembler/sample.php

74
lib/Decompiler.class.php
View File

@ -25,6 +25,12 @@ function str($code, $indent = '') // {{{
return (string) $code;
}
// }}}
function unsetArray(&$array, $name) // {{{
{
unset($array[$name]);
}
// }}}
function foldToCode($src, $indent = '') // {{{ wrap or rewrap anything to Decompiler_Code
{
if (is_array($indent)) {
@ -47,7 +53,7 @@ function foldToCode($src, $indent = '') // {{{ wrap or rewrap anything to Decomp
return $src;
}
// }}}
function value($value) // {{{
function value($value, &$EX) // {{{
{
$spec = xcache_get_special_value($value);
if (isset($spec)) {
@ -62,10 +68,15 @@ function value($value) // {{{
// use as is
}
else if (is_array($value)) {
$value = new Decompiler_ConstArray($value);
$value = new Decompiler_ConstArray($value, $EX);
}
else {
$value = new Decompiler_Value($value);
if (isset($EX['value2constant'][$value])) {
$value = new Decompiler_Code($EX['value2constant'][$value]);
}
else {
$value = new Decompiler_Value($value);
}
}
return $value;
}
@ -440,11 +451,11 @@ class Decompiler_Array extends Decompiler_Value // {{{
// }}}
class Decompiler_ConstArray extends Decompiler_Array // {{{
{
function Decompiler_ConstArray($array)
function Decompiler_ConstArray($array, &$EX)
{
$elements = array();
foreach ($array as $key => $value) {
$elements[] = array(value($key), value($value));
$elements[] = array(value($key, $EX), value($value, $EX));
}
$this->value = $elements;
}
@ -465,6 +476,9 @@ class Decompiler
{
public $namespace;
public $namespaceDecided;
public $activeClass;
public $activeMethod;
public $activeFunction;
function Decompiler()
{
@ -612,7 +626,7 @@ class Decompiler
{
switch ($op['op_type']) {
case XC_IS_CONST:
return value($op['constant']);
return value($op['constant'], $EX);
case XC_IS_VAR:
case XC_IS_TMP_VAR:
@ -1344,6 +1358,16 @@ class Decompiler
$EX['recvs'] = array();
$EX['uses'] = array();
$EX['lastBlock'] = null;
$EX['value2constant'] = array();
if (isset($this->activeClass)) {
$EX['value2constant'][$this->activeClass] = '__CLASS__';
}
if (isset($this->activeMethod)) {
$EX['value2constant'][$this->activeMethod] = '__METHOD__';
}
if (isset($this->activeFunction)) {
$EX['value2constant'][$this->activeFunction] = '__FUNCTION__';
}
/* dump whole array
$this->keepTs = true;
@ -1362,8 +1386,9 @@ class Decompiler
$T = &$EX['Ts'];
$opcodes = &$EX['opcodes'];
$lastphpop = null;
$currentSourceLine = null;
for ($i = $range[0]; $i <= $range[1]; $i ++) {
for ($i = $range[0]; $i <= $range[1]; $i ++, unsetArray($EX['value2constant'], $currentSourceLine)) {
// {{{ prepair
$op = &$opcodes[$i];
$opc = $op['opcode'];
@ -1376,6 +1401,8 @@ class Decompiler
$op2 = $op['op2'];
$res = $op['result'];
$ext = $op['extended_value'];
$currentSourceLine = $op['line'];
$EX['value2constant'][$currentSourceLine] = '__LINE__';
$opname = xcache_get_opcode($opc);
@ -1440,10 +1467,7 @@ class Decompiler
$istmpres = true;
}
else {
$class = $this->getOpVal($op2, $EX);
if (isset($op2['constant'])) {
$class = $this->stripNamespace(unquoteName($class));
}
$class = isset($op2['constant']) ? $op2['constant'] : $this->getOpVal($op2, $EX);
}
$resvar = $class;
break;
@ -1475,8 +1499,7 @@ class Decompiler
$rvalue = $this->getOpVal($op1, $EX);
$fetchtype = defined('ZEND_FETCH_TYPE_MASK') ? ($ext & ZEND_FETCH_TYPE_MASK) : $op2['EA.type'];
if ($fetchtype == ZEND_FETCH_STATIC_MEMBER) {
$class = $this->getOpVal($op2, $EX);
$rvalue = unquoteName(str($class)) . '::$' . unquoteName($rvalue, $EX);
$rvalue = $this->stripNamespace($op2['constant']) . '::$' . unquoteName($rvalue, $EX);
}
else if ($opc != XC_UNSET_VAR) {
$name = unquoteName($rvalue, $EX);
@ -1625,7 +1648,7 @@ class Decompiler
if (isset($statics[$name])) {
$var = $statics[$name];
$resvar .= ' = ';
$resvar .= str(value($var), $EX);
$resvar .= str(value($var, $EX), $EX);
}
unset($statics);
break 2;
@ -1673,8 +1696,7 @@ class Decompiler
}
$fetchtype = defined('ZEND_FETCH_TYPE_MASK') ? ($ext & ZEND_FETCH_TYPE_MASK) : $op2['EA.type'];
if ($fetchtype == ZEND_FETCH_STATIC_MEMBER) {
$class = $this->getOpVal($op2, $EX);
$rvalue = unquoteName(str($class)) . '::' . unquoteName($rvalue, $EX);
$rvalue = $this->stripNamespace($op2['constant']) . '::' . unquoteName($rvalue, $EX);
}
}
else if ($opc == XC_ISSET_ISEMPTY) {
@ -1739,7 +1761,7 @@ class Decompiler
$EX['called_scope'] = null;
}
$EX['fbc'] = $this->getOpVal($op2, $EX);
$EX['fbc'] = isset($op2['constant']) ? $op2['constant'] : $this->getOpVal($op2, $EX);
if (($opc == XC_INIT_STATIC_METHOD_CALL || $opc == XC_INIT_METHOD_CALL) && !isset($EX['fbc'])) {
$EX['fbc'] = '__construct';
}
@ -1845,7 +1867,9 @@ class Decompiler
unset($fetchop, $addop);
$i += 2;
}
$this->activeClass = $class['name'];
$this->dclass($class, $EX['indent']);
$this->activeClass = null;
echo "\n";
unset($class);
break;
@ -1861,7 +1885,7 @@ class Decompiler
$op2val = $this->getOpVal($op2, $EX);
switch ($opc) {
case XC_ADD_CHAR:
$op2val = value(chr(str($op2val)));
$op2val = value(chr(str($op2val)), $EX);
break;
case XC_ADD_STRING:
break;
@ -2023,7 +2047,7 @@ class Decompiler
$offset = isset($op1['var']) ? $op1['var'] : $op1['constant'];
$lvalue = $this->getOpVal($op['result'], $EX);
if ($opc == XC_RECV_INIT) {
$default = value($op['op2']['constant']);
$default = value($op['op2']['constant'], $EX);
}
else {
$default = null;
@ -2430,7 +2454,7 @@ class Decompiler
foreach ($class[$type] as $name => $v) {
echo $newindent;
echo $prefix, $name, ' = ';
echo str(value($v), $newindent);
echo str(value($v, $EX), $newindent);
echo ";\n";
}
}
@ -2501,7 +2525,7 @@ class Decompiler
}
if (isset($value)) {
echo ' = ';
echo str(value($value), $newindent);
echo str(value($value, $EX), $newindent);
}
echo ";\n";
}
@ -2548,7 +2572,11 @@ class Decompiler
break;
}
}
$this->activeMethod = $this->activeClass . '::' . $opa['function_name'];
$this->activeFunction = $opa['function_name'];
$this->dfunction($func, $newindent, $decorations, $isInterface || $isAbstractMethod);
$this->activeFunction = null;
$this->activeMethod = null;
if ($opa['function_name'] == 'Decompiler') {
//exit;
}
@ -2590,14 +2618,18 @@ class Decompiler
echo "<?". "php\n\n";
foreach ($this->dc['class_table'] as $key => $class) {
if ($key{0} != "\0") {
$this->activeClass = $class['name'];
$this->dclass($class);
$this->activeClass = null;
echo "\n";
}
}
foreach ($this->dc['function_table'] as $key => $func) {
if ($key{0} != "\0") {
$this->activeFunction = $key;
$this->dfunction($func);
$this->activeFunction = null;
echo "\n";
}
}

11
mod_disassembler/sample.php
View File

@ -36,7 +36,7 @@ abstract class ClassName
{
echo CONST_VALUE;
echo ClassName::CONST_VALUE;
unset(t::$classProp1);
unset(ClassName::$classProp1);
unset($obj->objProp);
unset($this->thisProp);
unset($array['index']->valueProp);
@ -45,6 +45,9 @@ abstract class ClassName
isset($GLOBALS['a']);
empty($GLOBALS['a']);
unset($GLOBALS['a']);
isset(ClassName::$a);
empty(ClassName::$a);
unset(ClassName::$a);
echo $GLOBALS['a'];
$obj->objProp = 1;
$this->thisProp = 1;
@ -57,7 +60,7 @@ abstract class ClassName
abstract public function abastractMethod();
/** doc */
public function method(array $a = NULL, $b = NULL)
public function method($a = NULL, $b = NULL)
{
}
@ -109,6 +112,7 @@ final class Child extends ClassName implements IInterface
ClassName::__construct();
echo __CLASS__;
echo __METHOD__;
echo __FUNCTION__;
throw new Exception();
$this->methodCall();
}
@ -121,10 +125,12 @@ final class Child extends ClassName implements IInterface
static public function __callStatic($name, $args)
{
parent::__callStatic($name, $args);
}
public function __toString()
{
parent::__toString();
}
public function __set($name, $value)
@ -168,6 +174,7 @@ if ($late) {
function lateBindingFunction($arg)
{
echo 'lateFunction';
return new lateBindingFunction();
}
}

Write Preview
Loading…
Cancel
Save