Hi!
Through https://bugs.xdebug.org/view.php?id=1185 I ran into a bug in PHP
proper. Apparently, this script:
<?php
class A {
static private $a;
static public function init() {
self::$a = 123;
}
}
A::init();
echo 'succcess!';
And running it with "valgrind php -n index.php", produces:
root@debian-8-64bit:/home/derick/xdebug-issue-1185# valgrind php -n
index.php
==760== Memcheck, a memory error detector
==760== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==760== Using Valgrind-3.10.0 and LibVEX; rerun with -h for copyright
info
==760== Command: php -n index.php
==760==
==760== Conditional jump or move depends on uninitialised value(s)
==760== at 0x797992: zend_std_get_static_method
(zend_object_handlers.c:1261)
==760== by 0x7B66FE:
ZEND_INIT_STATIC_METHOD_CALL_SPEC_CONST_CONST_HANDLER (zend_vm_execute.h:3887)
==760== by 0x7A379F: execute_ex (zend_vm_execute.h:363)
==760== by 0x76E2AF: zend_execute_scripts (zend.c:1341)
==760== by 0x70CC87: php_execute_script (main.c:2613)
==760== by 0x81A990: do_cli (php_cli.c:998)
==760== by 0x431996: main (php_cli.c:1382)
==760==
succcess!==760==
==760== HEAP SUMMARY:
==760== in use at exit: 96 bytes in 3 blocks
==760== total heap usage: 19,605 allocs, 19,602 frees, 3,589,979
bytes allocated
==760==
==760== LEAK SUMMARY:
==760== definitely lost: 0 bytes in 0 blocks
==760== indirectly lost: 0 bytes in 0 blocks
==760== possibly lost: 0 bytes in 0 blocks
==760== still reachable: 96 bytes in 3 blocks
==760== suppressed: 0 bytes in 0 blocks
==760== Rerun with --leak-check=full to see details of leaked memory
==760==
==760== For counts of detected and suppressed errors, rerun with: -v
==760== Use --track-origins=yes to see where uninitialised values come
from
==760== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
This is with the latest PHP-5.6 branch, and the GCC that comes with
Debian Jessie:
root@debian-8-64bit:/home/derick/xdebug-issue-1185# gcc --version
gcc (Debian 4.9.2-10) 4.9.2
Annoyingly, I can only produce this on a Debian Jessie (8.6) fresh install, and
not on my local machine. I can't seem to find the problem either, but I *can*
provide a VM and instructions to reproduce this. Or provide SSH access
into it upon request.
Anybody wants to try and fix this? I'm going to see whether PHP 7.0 and
7.1 have a similar issue too.
cheers,
Derick
--
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