[PHP-dev 564] Fwd: Re: [PHP-DEV] mbstring and 4.3.0

[Moriyoshi Koizumi]

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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