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Bug #51132 LinkedList max nodes, Segmentation fault
Submitted: 2010-02-24 09:16 UTC Modified: 2013-02-18 00:34 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: miha dot space at gmail dot com Assigned: colder (profile)
Status: No Feedback Package: SPL related
PHP Version: 5.*, 6 OS: *
Private report: No CVE-ID: None
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From: miha dot space at gmail dot com
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 [2010-02-24 09:16 UTC] miha dot space at gmail dot com
Description:
------------
Is there any limit i also tried with memory_get_usage and with 29000 linkedlistnodes it uses about 9.25MB. In php.ini i have max 128MB, so this can't be the problem.

Reproduce code:
---------------
<?php
  class LinkedListNode {
    public $data;
    public $next;

    public function __construct($data) {
      $this->data = $data;
      $this->next = NULL;
    }
  }

  class LinkedList {
    private $first;
    private $last;

    public function __construct() {
      $this->first = NULL;
      $this->last = NULL;
    }

    public function insertLast($data) {
      $node = new LinkedListNode($data);

      if( $this->first != NULL ) {
        $this->last->next = &$node;
        $this->last = &$node;
      }
      else {
        $this->first = &$node;
        $this->last = &$node;
      }
    }
  }

  $list = new LinkedList();

  /* it works
  for($i = 0; $i < 29488; $i++) {
    $list->insertLast(1);
  }*/

  // Segmentation fault
  for($i = 0; $i < 29489; $i++) {
    $list->insertLast(1);
  }
?>

Expected result:
----------------
Nothin, it should exit normally, not segfault.

Actual result:
--------------
 php test2.php
Segmentation fault


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AllCommentsChangesGit/SVN commitsRelated reports
 [2010-02-24 09:27 UTC] johannes@php.net
Etienne, please look into it. Thanks.
 [2010-02-24 09:55 UTC] miha dot space at gmail dot com
I tried also in Windows Vista and crashes to, if I try with Windows xp sp3 it works with $i=1000000 or until the memory_limit is reached.
 [2010-02-24 10:06 UTC] pajoye@php.net
Backtrace: http://pastie.org/840266
 [2010-03-02 03:02 UTC] felipe@php.net
-Package: Scripting Engine problem +Package: SPL related
 [2010-04-27 11:22 UTC] colder@php.net
-Status: Assigned +Status: Feedback
 [2010-04-27 11:22 UTC] colder@php.net
Please try using this snapshot:

  http://snaps.php.net/php5.3-latest.tar.gz
 
For Windows:

  http://windows.php.net/snapshots/


 [2013-02-18 00:34 UTC] php-bugs at lists dot php dot net
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Open". Thank you.
 
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