decompile code branch
git-svn-id: svn://svn.lighttpd.net/xcache/trunk@787 c26eb9a1-5813-0410-bd6c-c2e55f420ca73.0
Xuefer
parent
86ac689e68
commit
6d045a5975
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@ -521,12 +521,15 @@ class Decompiler
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}
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}
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// }}}
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function outputPhp(&$opcodes, $opline, $last, $indent) // {{{
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function outputPhp(&$EX, $opline, $last, $indent) // {{{
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{
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$origindent = $indent;
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$curticks = 0;
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for ($i = $opline; $i <= $last; $i ++) {
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$op = $opcodes[$i];
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$op = $EX['opcodes'][$i];
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if (isset($op['gofrom'])) {
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echo 'label' . $i, ":\n";
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}
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if (isset($op['php'])) {
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$toticks = isset($op['ticks']) ? (int) str($op['ticks']) : 0;
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if ($curticks != $toticks) {
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@ -647,21 +650,122 @@ class Decompiler
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return $opcodes;
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}
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// }}}
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function decompileBasicBlock(&$EX, $first, $last, $indent) // {{{
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{
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$this->dasmBasicBlock($EX, $first, $last);
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// $this->dumpRange($EX, $first, $last);
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$this->outputPhp($EX, $first, $last, $indent);
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}
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// }}}
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function removeJmpInfo(&$EX, $line) // {{{
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{
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$opcodes = &$EX['opcodes'];
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foreach ($opcodes[$line]['jmpouts'] as $jmpTo) {
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$jmpins = &$opcodes[$jmpTo]['jmpins'];
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$jmpins = array_flip($jmpins);
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unset($jmpins[$line]);
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$jmpins = array_keys($jmpins);
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}
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$opcodes[$line]['opcode'] = XC_NOP;
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unset($opcodes[$line]['jmpouts']);
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}
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// }}}
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function decompileComplexBlock(&$EX, $first, $last, $indent) // {{{
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{
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$opcodes = &$EX['opcodes'];
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$firstOp = &$opcodes[$first];
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$lastOp = &$opcodes[$last];
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if ($lastOp['opcode'] == XC_JMPNZ
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&& $lastOp['jmpouts'][0] == $first) {
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$this->removeJmpInfo($EX, $last);
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echo $indent, 'do {', PHP_EOL;
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$this->recognizeAndDecompileClosedBlocks($EX, $first, $last, $indent . INDENT);
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echo $indent, '} while (', str($this->getOpVal($lastOp['op1'], $EX)), ');', PHP_EOL;
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return;
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}
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$firstJmp = null;
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$firstJmpOp = null;
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for ($i = $first; $i <= $last; ++$i) {
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if (!empty($opcodes[$i]['jmpouts'])) {
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$firstJmp = $i;
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$firstJmpOp = &$opcodes[$firstJmp];
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break;
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}
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}
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if (isset($firstJmpOp)
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&& $firstJmpOp['opcode'] == XC_JMPZ
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&& $lastOp['opcode'] == XC_JMP
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&& $lastOp['jmpouts'][0] == $first) {
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$this->removeJmpInfo($EX, $firstJmp);
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$this->removeJmpInfo($EX, $last);
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ob_start();
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$this->recognizeAndDecompileClosedBlocks($EX, $first, $last, $indent . INDENT);
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$code = ob_get_clean();
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echo $indent, 'while (', str($this->getOpVal($firstJmpOp['op1'], $EX)), ') {', PHP_EOL;
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echo $code;
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echo $indent, '}', PHP_EOL;
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return;
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}
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$this->decompileBasicBlock($EX, $first, $last, $indent);
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}
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// }}}
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function recognizeAndDecompileClosedBlocks(&$EX, $first, $last, $indent) // {{{ decompile in a tree way
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{
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$opcodes = &$EX['opcodes'];
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$firstComplex = false;
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$i = $starti = $first;
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while ($i <= $last) {
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$op = $opcodes[$i];
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if (!empty($op['jmpins']) || !empty($op['jmpouts'])) {
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$blockFirst = $i;
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$blockLast = -1;
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$i = $blockFirst;
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do {
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if (!empty($op['jmpins'])) {
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// care about jumping from blocks behind, not before
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foreach ($op['jmpins'] as $oplineNumber) {
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if ($oplineNumber <= $last && $blockLast < $oplineNumber) {
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$blockLast = $oplineNumber;
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}
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}
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}
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if (!empty($op['jmpouts'])) {
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$blockLast = max($blockLast, max($op['jmpouts']) - 1);
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}
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++$i;
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} while ($i <= $blockLast);
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assert('$blockLast <= $last');
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if ($blockLast >= $blockFirst) {
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if ($blockFirst > $starti) {
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$this->decompileBasicBlock($EX, $starti, $blockFirst - 1, $indent);
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}
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$this->decompileComplexBlock($EX, $blockFirst, $blockLast, $indent);
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$i = $starti = $blockLast + 1;
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}
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continue;
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}
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++$i;
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}
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if ($starti <= $last) {
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$this->decompileBasicBlock($EX, $starti, $last, $indent);
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}
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}
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// }}}
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function &dop_array($op_array, $indent = '') // {{{
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{
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$op_array['opcodes'] = $this->fixOpcode($op_array['opcodes'], true, $indent == '' ? 1 : null);
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$opcodes = &$op_array['opcodes'];
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$EX['indent'] = '';
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// {{{ build jmp array
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// {{{ build jmpins/jmpouts to op_array
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for ($i = 0, $cnt = count($opcodes); $i < $cnt; $i ++) {
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$op = &$opcodes[$i];
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/*
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if ($op['opcode'] == XC_JMPZ) {
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$this->dumpop($op, $EX);
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var_dump($op);
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}
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continue;
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*/
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$op['line'] = $i;
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switch ($op['opcode']) {
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case XC_CONT:
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@ -670,6 +774,11 @@ class Decompiler
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break;
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case XC_GOTO:
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$target = $op['op1']['var'];
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$op['goto'] = $target;
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$opcodes[$target]['gofrom'][] = $i;
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break;
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case XC_JMP:
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$target = $op['op1']['var'];
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$op['jmpouts'] = array($target);
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@ -707,6 +816,11 @@ class Decompiler
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break;
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*/
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}
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/*
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if (!empty($op['jmpouts']) || !empty($op['jmpins'])) {
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echo $i, "\t", xcache_get_opcode($op['opcode']), PHP_EOL;
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}
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// */
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}
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unset($op);
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// }}}
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@ -739,11 +853,8 @@ class Decompiler
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$EX['recvs'] = array();
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$EX['uses'] = array();
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for ($next = 0, $last = $EX['last'];
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$loop = $this->outputCode($EX, $next, $last, $indent, true);
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list($next, $last) = $loop) {
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// empty
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}
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// decompile in a tree way
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$this->recognizeAndDecompileClosedBlocks($EX, 0, count($opcodes) - 1, $EX['indent']);
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return $EX;
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}
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// }}}
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@ -764,7 +875,7 @@ class Decompiler
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// echo ";;;\n";
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}
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$this->dasmBasicBlock($EX, $opline, $end);
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$this->outputPhp($EX['opcodes'], $opline, $end, $indent);
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$this->outputPhp($EX, $opline, $end, $indent);
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// jmpout op
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$op = &$EX['opcodes'][$end];
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$op1 = $op['op1'];
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@ -832,10 +943,6 @@ class Decompiler
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case XC_BRK:
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break;
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case XC_GOTO:
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echo $indent, 'goto', ' line', $op['jmpouts'][0], ';', "\n";
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break;
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default:
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echo $indent;
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echo xcache_get_opcode($op['opcode']), ' line', $op['jmpouts'][0];
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@ -893,7 +1000,7 @@ class Decompiler
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$opcodes = &$EX['opcodes'];
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$lastphpop = null;
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for ($i = $opline, $ic = $last + 1; $i < $ic; $i ++) {
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for ($i = $opline; $i <= $last; $i ++) {
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// {{{ prepair
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$op = &$opcodes[$i];
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$opc = $op['opcode'];
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@ -1381,12 +1488,12 @@ class Decompiler
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}
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for (;;) {
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if ($i + 1 < $ic
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if ($i + 1 <= $last
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&& $opcodes[$i + 1]['opcode'] == XC_ADD_INTERFACE
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&& $opcodes[$i + 1]['op1']['var'] == $res['var']) {
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// continue
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}
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else if ($i + 2 < $ic
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else if ($i + 2 <= $last
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&& $opcodes[$i + 2]['opcode'] == XC_ADD_INTERFACE
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&& $opcodes[$i + 2]['op1']['var'] == $res['var']
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&& $opcodes[$i + 1]['opcode'] == XC_FETCH_CLASS) {
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@ -1591,6 +1698,10 @@ class Decompiler
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}
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break;
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case XC_GOTO:
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$resvar = 'goto label' . $op['op1']['var'];
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$istmpres = false;
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break;
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case XC_JMP: // {{{
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$op['cond'] = null;
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$op['isjmp'] = true;
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@ -1796,6 +1907,14 @@ class Decompiler
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echo PHP_EOL;
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}
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// }}}
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function dumpRange(&$EX, $first, $last) // {{{
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{
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for ($i = $first; $i <= $last; ++$i) {
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echo $i, "\t"; $this->dumpop($EX['opcodes'][$i], $EX);
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}
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echo "==", PHP_EOL;
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}
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// }}}
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function dargs(&$EX, $indent) // {{{
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{
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$op_array = &$EX['op_array'];
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