[PHP-dev 565] Re: Fwd: Re: [PHP-DEV] mbstring and 4.3.0

[Yasuo Ohgaki]

大垣です。

コードで確認していないので当てずっぽうです。

-d を使った場合、まだ関数のエントリ（ハッシュ）が初期化されていない
のでsegfaultするのでは？

--
Yasuo Ohgaki

Moriyoshi Koizumi wrote:
> 小泉です。
> 
> 悪いニュースが三連続になってしまいましたが、
> 念のため転送しておきます。関数オーバーロードで segfault という
> つっこみなんですが…。
> 
> 現在この問題が発生した原因を究明している余裕がありません。
> どなたか見ていただけないでしょうか？
> 
> # 問題発生原因が本当にオーバーロードなのか、それとも、
> # オーバーロードによって露呈したEGにまつわる別の不具合なのか。
> # これだとバックトレースがまったく役に立ちませんね。
> 
> 
> "Ilia A." <ilia@prohost.org> wrote:
> 
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>>From: "Ilia A." <ilia@prohost.org>
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>>To: Andrei Zmievski <andrei@gravitonic.com>,
>>   PHP Developers <php-dev@lists.php.net>
>>Date: Tue, 12 Nov 2002 15:07:44 -0500
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>>Subject: Re: [PHP-DEV] mbstring and 4.3.0
>>X-UIDL: e309e329402b182e8f1d662b6653457c
>>
>>On November 7, 2002 10:04 am, Andrei Zmievski wrote:
>>
>>>At the PHP Conference in Germany several of us have discussed the
>>>current state of mbstring and there was a proposal to not have it
>>>enabled by default for 4.3.0 release. It seems that the extension
>>>attempts to do "magic" stuff by overloading functions in the executor
>>>globals and, as Thies said, that could be dangerous. Also, doesn't it
>>>affect run-tests.php script currently?
>>>
>>
>>On the note of overloading done by mbstring, it appears this behavior is not 
>>entirely stable. On at least one test system (Sun OS 5.9) it causes crashes 
>>and overruns by using the test script in the test suite.
>>Ex:
>>sapi/cli/php -d "mbstring.func_overload=1" -r ''
>>Unknown(0) : Fatal error - (null)() [http://www.php.net/ref.mbstring]: 
>>mbstring couldn't find function mail.
>>Could not startup.
>>[Tue Nov 12 21:01:33 2002]  Script:  '-'
>>---------------------------------------
>>php4/Zend/zend_execute.h(44) : Block 0x001FB640 status:
>>Beginning:      Overrun (magic=0x001FE7F8, expected=0x7312F8DC)
>>      End:      Unknown
>>---------------------------------------
>>
>>The test script itself (ext/mbstring/tests/overload.phpt) causes a 
>>segmentation fault. Here is a back trace:
>>#0  0x001528f8 in shutdown_memory_manager (silent=1, clean_cache=1) at 
>>php4/Zend/zend_alloc.c:461
>>#1  0x0011d944 in php_module_shutdown () at php4/main/main.c:1219
>>#2  0x0018d8d0 in main (argc=39, argv=0xffbffa74) at 
>>php4/sapi/cli/php_cli.c:761
>>
>>Ilia
>>
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> 
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