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   1  <?php
   2  /**
   3   * Profiler showing execution trace.
   4   *
   5   * This program is free software; you can redistribute it and/or modify
   6   * it under the terms of the GNU General Public License as published by
   7   * the Free Software Foundation; either version 2 of the License, or
   8   * (at your option) any later version.
   9   *
  10   * This program is distributed in the hope that it will be useful,
  11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13   * GNU General Public License for more details.
  14   *
  15   * You should have received a copy of the GNU General Public License along
  16   * with this program; if not, write to the Free Software Foundation, Inc.,
  17   * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18   * http://www.gnu.org/copyleft/gpl.html
  19   *
  20   * @file
  21   * @ingroup Profiler
  22   */
  23  
  24  /**
  25   * Execution trace profiler
  26   * @todo document methods (?)
  27   * @ingroup Profiler
  28   */
  29  class ProfilerSimpleTrace extends ProfilerStandard {
  30      protected $trace = "Beginning trace: \n";
  31      protected $memory = 0;
  32  
  33  	protected function collateOnly() {
  34          return true;
  35      }
  36  
  37  	public function profileIn( $functionname ) {
  38          parent::profileIn( $functionname );
  39  
  40          $this->trace .= "         " . sprintf( "%6.1f", $this->memoryDiff() ) .
  41              str_repeat( " ", count( $this->mWorkStack ) ) . " > " . $functionname . "\n";
  42      }
  43  
  44  	public function profileOut( $functionname ) {
  45          $item = end( $this->mWorkStack );
  46  
  47          parent::profileOut( $functionname );
  48  
  49          if ( !$item ) {
  50              $this->trace .= "Profiling error: $functionname\n";
  51          } else {
  52              list( $ofname, /* $ocount */, $ortime ) = $item;
  53              if ( $functionname == 'close' ) {
  54                  $message = "Profile section ended by close(): {$ofname}";
  55                  $functionname = $ofname;
  56                  $this->trace .= $message . "\n";
  57              } elseif ( $ofname != $functionname ) {
  58                  $this->trace .= "Profiling error: in({$ofname}), out($functionname)";
  59              }
  60              $elapsedreal = $this->getTime() - $ortime;
  61              $this->trace .= sprintf( "%03.6f %6.1f", $elapsedreal, $this->memoryDiff() ) .
  62                  str_repeat( " ", count( $this->mWorkStack ) + 1 ) . " < " . $functionname . "\n";
  63          }
  64      }
  65  
  66  	protected function memoryDiff() {
  67          $diff = memory_get_usage() - $this->memory;
  68          $this->memory = memory_get_usage();
  69          return $diff / 1024;
  70      }
  71  
  72  	public function logData() {
  73          if ( $this->mTemplated ) {
  74              if ( PHP_SAPI === 'cli' ) {
  75                  print "<!-- \n {$this->trace} \n -->";
  76              } elseif ( $this->getContentType() === 'text/html' ) {
  77                  print "<!-- \n {$this->trace} \n -->";
  78              } elseif ( $this->getContentType() === 'text/javascript' ) {
  79                  print "\n/*\n {$this->trace}\n*/";
  80              } elseif ( $this->getContentType() === 'text/css' ) {
  81                  print "\n/*\n {$this->trace}\n*/";
  82              }
  83          }
  84      }
  85  }