Bug #71196 [NEW]: Memory leak with out-of-order live ranges
From: bwoebi
Operating system: Irrelevant
PHP version: master-Git-2015-12-22 (Git)
Package: Scripting Engine problem
Bug Type: Bug
Bug description:Memory leak with out-of-order live ranges
Description:
------------
Outputting live ranges gives me:
LIVE RANGES:
6: L6 - L7
(tmp/var)
3: L2 - L9
Now, if there is an exception thrown between opline 2 and 5,
http://lxr.php.net/xref/PHP_MASTER/Zend/zend_execute.c#2586
has a
condition with a break;, hence cleanup won't be done for temporary 3
(the array).
Removing that break; fixes it, but maybe there is a better fix?
Test script:
---------------
try {
$a = "1";
[1, (y().$a.$a) . ($a.$a)];
} catch (Error $e) {
var_dump($e->getMessage());
}
Actual result:
--------------
HashTable leaks:
[Tue Dec 22 13:21:38 2015] Script: '/Users/Bob/php-src-X/_'
Zend/zend_vm_execute.h(7076) : Freeing 0x10BC5A360 (56 bytes),
script=/Users/Bob/php-src-X/_
[Tue Dec 22 13:21:38 2015] Script: '/Users/Bob/php-src-X/_'
/Users/Bob/php-src-X/Zend/zend_hash.c(133) : Freeing 0x10BC60A00 (264
bytes), script=/Users/Bob/php-src-X/_
=== Total 2 memory leaks detected ===
--
Edit bug report at https://bugs.php.net/bug.php?id=71196&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=71196&r=trysnapshot54
Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=71196&r=trysnapshot55
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=71196&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=71196&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=71196&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=71196&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=71196&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=71196&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=71196&r=support
Expected behavior: https://bugs.php.net/fix.php?id=71196&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=71196&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=71196&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=71196&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=71196&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=71196&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=71196&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=71196&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=71196&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=71196&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=71196&r=mysqlcfg
Thread (3 messages)
- bwoebi@php.net