mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/Scribunto
synced 2024-11-27 09:40:12 +00:00
3d51662881
This is apparently unofficially deprecated, and we can do things a bit more straightforwardly by using ParserOutput::addJsConfigVars() to communicate the error messages to the JS. This also takes the opportunity to move "ext.scribunto", which is mostly about errors, to "ext.scribunto.errors". Bug: T75618 Change-Id: I1577dab2dab1bd79cb127879de141fdbb8963aeb
390 lines
11 KiB
PHP
390 lines
11 KiB
PHP
<?php
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class Scribunto_LuaSandboxEngine extends Scribunto_LuaEngine {
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public $options, $loaded = false;
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protected $lineCache = array();
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public function getPerformanceCharacteristics() {
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return array(
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'phpCallsRequireSerialization' => false,
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);
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}
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public function getSoftwareInfo( array &$software ) {
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if ( is_callable( 'LuaSandbox::getVersionInfo' ) ) {
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$versions = LuaSandbox::getVersionInfo();
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} else {
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$sandbox = new LuaSandbox;
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list( $luaver ) = $sandbox->loadString( 'return _VERSION' )->call();
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$versions = array(
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'LuaSandbox' => phpversion( "LuaSandbox" ),
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'Lua' => $luaver,
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);
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}
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$software['[https://www.mediawiki.org/wiki/Extension:Scribunto#LuaSandbox LuaSandbox]'] = $versions['LuaSandbox'];
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$software['[http://www.lua.org/ Lua]'] = str_replace( 'Lua ', '', $versions['Lua'] );
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if ( isset( $versions['LuaJIT'] ) ) {
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$software['[http://luajit.org/ LuaJIT]'] = str_replace( 'LuaJIT ', '', $versions['LuaJIT'] );
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}
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}
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private function getLimitReportData() {
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$ret = array();
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$this->load();
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$t = $this->interpreter->getCPUUsage();
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$ret['scribunto-limitreport-timeusage'] = array(
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sprintf( "%.3f", $t ),
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sprintf( "%.3f", $this->options['cpuLimit'] )
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);
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$ret['scribunto-limitreport-memusage'] = array(
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$this->interpreter->getPeakMemoryUsage(),
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$this->options['memoryLimit'],
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);
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$logs = $this->getLogBuffer();
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if ( $logs !== '' ) {
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$ret['scribunto-limitreport-logs'] = $logs;
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}
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if ( $t < 1.0 ) {
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return $ret;
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}
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$percentProfile = $this->interpreter->getProfilerFunctionReport(
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Scribunto_LuaSandboxInterpreter::PERCENT
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);
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if ( !count( $percentProfile ) ) {
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return $ret;
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}
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$timeProfile = $this->interpreter->getProfilerFunctionReport(
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Scribunto_LuaSandboxInterpreter::SECONDS
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);
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$lines = array();
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$cumulativePercent = 0;
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$num = $otherTime = $otherPercent = 0;
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foreach ( $percentProfile as $name => $percent ) {
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$time = $timeProfile[$name] * 1000;
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$num++;
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if ( $cumulativePercent <= 99 && $num <= 10 ) {
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// Map some regularly appearing internal names
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if ( preg_match( '/^<mw.lua:(\d+)>$/', $name, $m ) ) {
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$line = $this->getMwLuaLine( $m[1] );
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if ( preg_match( '/^\s*(local\s+)?function ([a-zA-Z0-9_.]*)/', $line, $m ) ) {
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$name = $m[2] . ' ' . $name;
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}
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}
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$lines[] = array( $name, sprintf( '%.0f', $time ), sprintf( '%.1f', $percent ) );
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} else {
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$otherTime += $time;
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$otherPercent += $percent;
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}
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$cumulativePercent += $percent;
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}
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if ( $otherTime ) {
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$lines[] = array( '[others]', sprintf( '%.0f', $otherTime ), sprintf( '%.1f', $otherPercent ) );
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}
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$ret['scribunto-limitreport-profile'] = $lines;
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return $ret;
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}
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public function getLimitReport() {
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$data = $this->getLimitReportData();
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$lang = Language::factory( 'en' );
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$t = $this->interpreter->getCPUUsage();
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$s = 'Lua time usage: ' . sprintf( "%.3f", $data['scribunto-limitreport-timeusage'] ) . "s\n" .
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'Lua memory usage: ' . $lang->formatSize( $data['scribunto-limitreport-memusage'] ) . "\n";
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if ( isset( $data['scribunto-limitreport-profile'] ) ) {
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$s .= "Lua Profile:\n";
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$format = " %-59s %8.0f ms %8.1f%%\n";
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foreach ( $data['scribunto-limitreport-profile'] as $line ) {
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$s .= sprintf( $format, $line[0], $line[1], $line[2] );
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}
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}
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return $s;
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}
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public function reportLimitData( ParserOutput $output ) {
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$data = $this->getLimitReportData();
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foreach ( $data as $k => $v ) {
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$output->setLimitReportData( $k, $v );
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}
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if ( isset( $data['scribunto-limitreport-logs'] ) ) {
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$output->addModules( 'ext.scribunto.logs' );
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}
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}
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public function formatLimitData( $key, &$value, &$report, $isHTML, $localize ) {
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global $wgLang;
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$lang = $localize ? $wgLang : Language::factory( 'en' );
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switch ( $key ) {
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case 'scribunto-limitreport-logs':
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if ( $isHTML ) {
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$report .= $this->formatHtmlLogs( $value, $localize );
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}
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return false;
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case 'scribunto-limitreport-memusage':
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$value = array_map( array( $lang, 'formatSize' ), $value );
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break;
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}
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if ( $key !== 'scribunto-limitreport-profile' ) {
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return true;
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}
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$keyMsg = wfMessage( 'scribunto-limitreport-profile' );
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$msMsg = wfMessage( 'scribunto-limitreport-profile-ms' );
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$percentMsg = wfMessage( 'scribunto-limitreport-profile-percent' );
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if ( !$localize ) {
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$keyMsg->inLanguage( 'en' )->useDatabase( false );
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$msMsg->inLanguage( 'en' )->useDatabase( false );
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$percentMsg->inLanguage( 'en' )->useDatabase( false );
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}
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// To avoid having to do actual work in Message::fetchMessage for each
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// line in the loops below, call ->exists() here to populate ->message.
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$msMsg->exists();
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$percentMsg->exists();
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if ( $isHTML ) {
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$report .= Html::openElement( 'tr' ) .
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Html::rawElement( 'th', array( 'colspan' => 2 ), $keyMsg->parse() ) .
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Html::closeElement( 'tr' ) .
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Html::openElement( 'tr' ) .
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Html::openElement( 'td', array( 'colspan' => 2 ) ) .
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Html::openElement( 'table' );
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foreach ( $value as $line ) {
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$name = $line[0];
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$location = '';
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if ( preg_match( '/^(.*?) *<([^<>]+):(\d+)>$/', $name, $m ) ) {
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$name = $m[1];
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$title = Title::newFromText( $m[2] );
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if ( $title && $title->getNamespace() === NS_MODULE ) {
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$location = '<' . Linker::link( $title ) . ":{$m[3]}>";
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} else {
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$location = htmlspecialchars( "<{$m[2]}:{$m[3]}>" );
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}
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}
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$ms = clone $msMsg;
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$ms->params( $line[1] );
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$pct = clone $percentMsg;
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$pct->params( $line[2] );
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$report .= Html::openElement( 'tr' ) .
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Html::element( 'td', null, $name ) .
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Html::rawElement( 'td', null, $location ) .
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Html::rawElement( 'td', array( 'align' => 'right' ), $ms->parse() ) .
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Html::rawElement( 'td', array( 'align' => 'right' ), $pct->parse() ) .
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Html::closeElement( 'tr' );
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}
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$report .= Html::closeElement( 'table' ) .
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Html::closeElement( 'td' ) .
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Html::closeElement( 'tr' );
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} else {
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$report .= $keyMsg->text() . ":\n";
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foreach ( $value as $line ) {
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$ms = clone $msMsg;
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$ms->params( $line[1] );
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$pct = clone $percentMsg;
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$pct->params( $line[2] );
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$report .= sprintf( " %-59s %11s %11s\n", $line[0], $ms->text(), $pct->text() );
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}
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}
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return false;
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}
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protected function getMwLuaLine( $lineNum ) {
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if ( !isset( $this->lineCache['mw.lua'] ) ) {
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$this->lineCache['mw.lua'] = file( $this->getLuaLibDir() . '/mw.lua' );
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}
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return $this->lineCache['mw.lua'][$lineNum - 1];
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}
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function newInterpreter() {
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return new Scribunto_LuaSandboxInterpreter( $this, $this->options );
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}
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}
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class Scribunto_LuaSandboxInterpreter extends Scribunto_LuaInterpreter {
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/**
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* @var Scribunto_LuaEngine
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*/
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public $engine;
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/**
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* @var LuaSandbox
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*/
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public $sandbox;
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/**
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* @var bool
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*/
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public $profilerEnabled;
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const SAMPLES = 0;
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const SECONDS = 1;
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const PERCENT = 2;
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function __construct( $engine, array $options ) {
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if ( !extension_loaded( 'luasandbox' ) ) {
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throw new Scribunto_LuaInterpreterNotFoundError(
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'The luasandbox extension is not present, this engine cannot be used.' );
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}
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$this->engine = $engine;
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$this->sandbox = new LuaSandbox;
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$this->sandbox->setMemoryLimit( $options['memoryLimit'] );
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$this->sandbox->setCPULimit( $options['cpuLimit'] );
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if ( is_callable( array( $this->sandbox, 'enableProfiler' ) ) )
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{
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if ( !isset( $options['profilerPeriod'] ) ) {
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$options['profilerPeriod'] = 0.02;
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}
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if ( $options['profilerPeriod'] ) {
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$this->profilerEnabled = true;
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$this->sandbox->enableProfiler( $options['profilerPeriod'] );
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}
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}
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}
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protected function convertSandboxError( LuaSandboxError $e ) {
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$opts = array();
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if ( isset( $e->luaTrace ) ) {
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$opts['trace'] = $e->luaTrace;
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}
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$message = $e->getMessage();
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if ( preg_match( '/^(.*?):(\d+): (.*)$/', $message, $m ) ) {
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$opts['module'] = $m[1];
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$opts['line'] = $m[2];
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$message = $m[3];
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}
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return $this->engine->newLuaError( $message, $opts );
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}
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/**
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* @param string $text
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* @param string $chunkName
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* @throws Scribunto_LuaError
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*/
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public function loadString( $text, $chunkName ) {
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try {
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return $this->sandbox->loadString( $text, $chunkName );
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} catch ( LuaSandboxError $e ) {
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throw $this->convertSandboxError( $e );
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}
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}
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public function registerLibrary( $name, array $functions ) {
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$realLibrary = array();
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foreach ( $functions as $funcName => $callback ) {
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$realLibrary[$funcName] = array(
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new Scribunto_LuaSandboxCallback( $callback ),
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$funcName );
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}
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$this->sandbox->registerLibrary( $name, $realLibrary );
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# TODO: replace this with
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#$this->sandbox->registerVirtualLibrary(
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# $name, array( $this, 'callback' ), $functions );
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}
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public function callFunction( $func /*, ... */ ) {
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$args = func_get_args();
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$func = array_shift( $args );
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try {
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$ret = call_user_func_array( array( $func, 'call' ), $args );
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if ( $ret === false ) {
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// Per the documentation on LuaSandboxFunction::call, a return value
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// of false means that something went wrong and it's PHP's fault,
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// so throw a "real" exception.
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throw new MWException(
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__METHOD__ . ': LuaSandboxFunction::call returned false' );
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}
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return $ret;
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} catch ( LuaSandboxTimeoutError $e ) {
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throw $this->engine->newException( 'scribunto-common-timeout' );
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} catch ( LuaSandboxError $e ) {
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throw $this->convertSandboxError( $e );
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}
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}
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public function wrapPhpFunction( $callable ) {
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if ( is_callable( array( $this->sandbox, 'wrapPhpFunction' ) ) ) {
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return $this->sandbox->wrapPhpFunction( $callable );
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}
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// We have to hack around the lack of the wrapper function by loading a
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// dummy library with $callable, then extracting the function, and then
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// for good measure nilling out the library table.
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list( $name ) = $this->sandbox->loadString( '
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for i = 0, math.huge do
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if not _G["*LuaSandbox* temp" .. i] then return "*LuaSandbox* temp" .. i end
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end
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' )->call();
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$this->sandbox->registerLibrary( $name, array( 'func' => $callable ) );
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list( $func ) = $this->sandbox->loadString(
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"local ret = _G['$name'].func _G['$name'] = nil return ret"
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)->call();
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return $func;
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}
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public function isLuaFunction( $object ) {
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return $object instanceof LuaSandboxFunction;
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}
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public function getPeakMemoryUsage() {
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return $this->sandbox->getPeakMemoryUsage();
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}
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public function getCPUUsage() {
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return $this->sandbox->getCPUUsage();
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}
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public function getProfilerFunctionReport( $units ) {
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if ( $this->profilerEnabled ) {
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static $unitsMap;
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if ( !$unitsMap ) {
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$unitsMap = array(
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self::SAMPLES => LuaSandbox::SAMPLES,
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self::SECONDS => LuaSandbox::SECONDS,
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self::PERCENT => LuaSandbox::PERCENT );
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}
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return $this->sandbox->getProfilerFunctionReport( $unitsMap[$units] );
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} else {
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return array();
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}
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}
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public function pauseUsageTimer() {
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if ( is_callable( array( $this->sandbox, 'pauseUsageTimer' ) ) ) {
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$this->sandbox->pauseUsageTimer();
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}
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}
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public function unpauseUsageTimer() {
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if ( is_callable( array( $this->sandbox, 'unpauseUsageTimer' ) ) ) {
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$this->sandbox->unpauseUsageTimer();
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}
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}
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}
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class Scribunto_LuaSandboxCallback {
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function __construct( $callback ) {
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$this->callback = $callback;
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}
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/**
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* We use __call with a variable function name so that LuaSandbox will be
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* able to return a meaningful function name in profiling data.
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*/
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function __call( $funcName, $args ) {
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try {
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return call_user_func_array( $this->callback, $args );
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} catch ( Scribunto_LuaError $e ) {
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throw new LuaSandboxRuntimeError( $e->getLuaMessage() );
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}
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}
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}
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