Bug #53663 [Fbk->Opn]: fatal error with bad memory allocation in a script echo & exit

From: Date: Mon, 17 Jan 2011 03:42:44 +0000
Subject: Bug #53663 [Fbk->Opn]: fatal error with bad memory allocation in a script echo & exit
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-157942@lists.php.net to get a copy of this message
Edit report at http://bugs.php.net/bug.php?id=53663&edit=1

 ID:                 53663
 User updated by:    sskaje at gmail dot com
 Reported by:        sskaje at gmail dot com
 Summary:            fatal error with bad memory allocation in a script
                     echo & exit
-Status:             Feedback
+Status:             Open
 Type:               Bug
 Package:            Scripting Engine problem
 Operating System:   Linux/CentOS
 PHP Version:        5.3.4
 Block user comment: N
 Private report:     N

 New Comment:

@Stas: I upgrade my php to 5.3.5 and the memory allocation message
disappeared 
while a *no response* request still exists.

php scripts:

[root@dev test]# more test*.php > /tmp/php.txt
[root@dev test]# cat /tmp/php.txt 
::::::::::::::
test1.php
::::::::::::::
<?php

echo 'a';
exit;
require(__DIR__ . '/Controller.php');

class test extends TestController
{
    public function action()
    {
        $this->output = 'Hello';
        $this->display('raw');
    }
}
new test;
::::::::::::::
test2.php
::::::::::::::
<?php

echo 'a';
exit;

__halt_compiler();
require(__DIR__ . '/Controller.php');

class test extends TestController
{
    public function action()
    {
        $this->output = 'Hello';
        $this->display('raw');
    }
}
new test;
::::::::::::::
test3.php
::::::::::::::
<?php

echo 'a';
exit;

require(__DIR__ . '/Controller.php');

__halt_compiler();
class test extends TestController
{
    public function action()
    {
        $this->output = 'Hello';
        $this->display('raw');
    }
}
new test;
::::::::::::::
test4.php
::::::::::::::
<?php

echo 'a';
exit;

require(__DIR__ . '/Controller.php');

class test extends TestController
{
    public function action()
    {
        $this->output = 'Hello';
        $this->display('raw');
    }
}
__halt_compiler();
new test;


==============
Controller.php:
[root@dev test]# more Controller.php 
<?php
/**
 * 业务 TestController
 * 
 */

require(__DIR__ . '/../ControllerBase.php');

abstract class TestController extends ControllerBase
{
    public function __construct()
    {
        # 禁用 GPC
        $this->diable_gpc();
        
        $this->checkPara();
        $this->action();
    }


    public function __destruct()
    {
        if (!empty($this->output)) {
            # 默认输出
            $this->display();
            unset($this->output);
        }
    }
}

# EOF


==========================
Results:
 test1.php: no http response returned.
 test2.php: http 200 and an output of 'a'
 test3.php: same as test2.php
 test4.php: same as test1.php


Previous Comments:
------------------------------------------------------------------------
[2011-01-16 22:09:33] stas@php.net

Could you please post exact script that doesn't work? I tried some
permutations of uncommenting stuff in your example and no one of them
led to the error.

------------------------------------------------------------------------
[2011-01-06 09:17:17] sskaje at gmail dot com

The original script is like 

<?php

require(__DIR__ . '/blahsparent.php');
class blahblah extends blahsparent
{
    
}

new blahblah;

only if __halt_compiler(); was added before the line of 'class ....',
error would not be triggered.

------------------------------------------------------------------------
[2011-01-06 09:13:04] sskaje at gmail dot com

In fact, there are also error logs in httpd error-log:

[Thu Jan 06 15:15:41 2011] [error] [client 172.16.1.123] PHP Fatal
error:  Allowed memory size of 134217728 bytes exhausted (tried to
allocate 543450464 bytes) in Unknown on line 0
[Thu Jan 06 15:16:27 2011] [error] [client 172.16.1.123] PHP Fatal
error:  Allowed memory size of 134217728 bytes exhausted (tried to
allocate 1735355393 bytes) in Unknown on line 0
[Thu Jan 06 15:16:27 2011] [error] [client 172.16.1.123] PHP Fatal
error:  Allowed memory size of 134217728 bytes exhausted (tried to
allocate 1999598178 bytes) in Unknown on line 0
[Thu Jan 06 15:16:27 2011] [error] [client 172.16.1.123] PHP Fatal
error:  Allowed memory size of 134217728 bytes exhausted (tried to
allocate 1999598178 bytes) in Unknown on line 0
[Thu Jan 06 15:16:27 2011] [error] [client 172.16.1.123] PHP Fatal
error:  Allowed memory size of 134217728 bytes exhausted (tried to
allocate 1999598178 bytes) in Unknown on line 0
[Thu Jan 06 15:16:28 2011] [error] [client 172.16.1.123] PHP Fatal
error:  Allowed memory size of 134217728 bytes exhausted (tried to
allocate 1999598178 bytes) in Unknown on line 0

And the 'PHP Fatal error: Exception thrown without a stack frame in
Unknown on line 0' might not be logged by this test script. 

Sorry.

------------------------------------------------------------------------
[2011-01-06 09:09:45] sskaje at gmail dot com

Description:
------------
Linux/CentOS 5.5 x86_64
PHP 5.3.4
Apache 2.2.16
Tested and can be reproduced under Apache httpd +
mod_php5/nginx+fastcgi.
Ok under CLI(at least cant be reproduced under cli.)

I tested a script like below, which was simplified to the minimal.
I was about to dump something, then wrote a var_dump() with an exit;,
then i found the php results a fatal error like:

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to
allocate 1702113144 bytes) in Unknown on line 0 ...

then In apache error log:

PHP Fatal error: Exception thrown without a stack frame in Unknown on
line 0

Apache httpd/nginx usually gives *no response* to the http get request.


check the following code:
uncomment:
  1st __halt_compiler();   .... OK
  2nd __halt_compiler();   .... BAD

then exchange the lines of definitions of class a and b, uncomment:
  1st __halt_compiler();   .... OK
  2nd __halt_compiler();   .... OK


only in 5.3.4, works perfectly in 5.3.3.

Test script:
---------------
<?php
echo 'a';
exit;
#__halt_compiler();
class a extends b{}
class b{}

#__halt_compiler();
#new a;

Expected result:
----------------
a

Actual result:
--------------
error like 
[quote]
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to
allocate 1702113144 bytes) in Unknown on line 0 ...

then In apache error log:

PHP Fatal error: Exception thrown without a stack frame in Unknown on
line 0

Apache httpd/nginx usually gives *no response* to the http get request.

[/quote]


------------------------------------------------------------------------



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