Re: [PHP-DEV] Reentrant C scanners for PHP

[Rasmus Lerdorf]

> > Looks very nice.  Do you think you could LGPL it instead of GPL?  Would be
> > tricky to use in conjunction with the QPL if it was GPL'ed.
>
> As it's my intention that the code is linked against PHP/the
> Zend Engine, the GPL should be fine here (similar to the
> situation of the GPLed KDE project and the QPLed QT 1).
> Anyway, the license is subject to change.

Ok, but we still have a bit of work to do to make the Apache/PHP license
GPL-compatible.  Perhaps by the time ngscan is ready this
GPL-compatibility issues will have worked themselves out and the GPL would
be fine for ngscan.  Leave it GPL'ed and we will wait and see what
happens.

> Can you give http://schumann.cx/ngscan-0.2.tar.gz a try?  The
> example works fine here, regardless of the number of
> iterations.  Backquotes are supported now, too.

No, I still get a segfault:

Program received signal SIGSEGV, Segmentation fault.
0x081439d4 in _efree (ptr=0x835d7ac, __zend_filename=0x8249f46
"cgi_main.c", __zend_lineno=793, __zend_orig_filename=0x0,
__zend_orig_lineno=0) at zend_alloc.c:212
212 CALCULATE_REAL_SIZE_AND_CACHE_INDEX(p->size);
(gdb) bt
#0  0x081439d4 in _efree (ptr=0x835d7ac, __zend_filename=0x8249f46
"cgi_main.c", __zend_lineno=793, __zend_orig_filename=0x0,
__zend_orig_lineno=0) at zend_alloc.c:212
#1  0x08078958 in main (argc=2, argv=0xb9c4) at cgi_main.c:793
#2  0x4040c177 in __libc_start_main (main=0x8077efc , argc=2,
ubp_av=0xb9c4, init=0x8075914 <_init>, fini=0x8249b40 <_fini>,
rtld_fini=0x4000e184 <_dl_fini>, stack_end=0xb9bc) at
../sysdeps/generic/libc-start.c:129

I will send you the exact script causing it (offline)

-Rasmus


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Re: [PHP-DEV] Reentrant C scanners for PHP

[Sascha Schumann]

> Looks very nice.  Do you think you could LGPL it instead of GPL?  Would be
> tricky to use in conjunction with the QPL if it was GPL'ed.

As it's my intention that the code is linked against PHP/the
Zend Engine, the GPL should be fine here (similar to the
situation of the GPLed KDE project and the QPLed QT 1).
Anyway, the license is subject to change.

> This is a test
> $b = 'Hello';
>$c = "$a $b";
>echo $a.$b.$c."\n";
> ?>
> And this is the last line
>
> generates this overrun:

Can you give http://schumann.cx/ngscan-0.2.tar.gz a try?  The
example works fine here, regardless of the number of
iterations.  Backquotes are supported now, too.

- Sascha Experience IRCG
  http://schumann.cx/http://schumann.cx/ircg


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Re: [PHP-DEV] Reentrant C scanners for PHP

[Rasmus Lerdorf]

> Because software already exists to eliminate the scan/parse
> process, speed was not a main concern.  The new language
> scanner is faster than the old one in all tested scenarios
> though.

;)  This is so "Sascha"!

Looks very nice.  Do you think you could LGPL it instead of GPL?  Would be
tricky to use in conjunction with the QPL if it was GPL'ed.

This script:

This is a test

And this is the last line

generates this overrun:

---
cgi_main.c(793) : Block 0x0835D7E8 status:
Beginning:  Overrun (magic=0x082F9BB8, expected=0x7312F8DC)
  End:  Unknown
---

And if I repeat the above code 1 times in a file, I get a segfault:

Program received signal SIGSEGV, Segmentation fault.
0x081439d4 in _efree (ptr=0x835d80c, __zend_filename=0x824a0c6 "cgi_main.c", 
__zend_lineno=793, __zend_orig_filename=0x0,
__zend_orig_lineno=0) at zend_alloc.c:212
212 CALCULATE_REAL_SIZE_AND_CACHE_INDEX(p->size);
(gdb) bt
#0  0x081439d4 in _efree (ptr=0x835d80c, __zend_filename=0x824a0c6 "cgi_main.c", 
__zend_lineno=793, __zend_orig_filename=0x0,
__zend_orig_lineno=0) at zend_alloc.c:212
#1  0x08078958 in main (argc=2, argv=0xb9c4) at cgi_main.c:793
#2  0x4040c177 in __libc_start_main (main=0x8077efc , argc=2, ubp_av=0xb9c4, 
init=0x8075914 <_init>, fini=0x8249cc0 <_fini>,
rtld_fini=0x4000e184 <_dl_fini>, stack_end=0xb9bc) at
../sysdeps/generic/libc-start.c:129

-Rasmus


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Re: [PHP-DEV] Reentrant C scanners for PHP

[Thies C. Arntzen]

On Fri, Jul 06, 2001 at 01:08:03AM +0200, Sascha Schumann wrote:
> This is the first public release of fully reentrant C
> scanners for the PHP language and the INI system.  They
> can be used to replace the Flex-based implementations
> commonly found in the Zend Engine.
> 
> Features:
> 
> - Flexible I/O model; lays groundwork for fully supporting
>   modern web-servers such as Apache 2.0;
> - uses portable C only; significantly improves portability by
>   removing dependence on GNU extensions of C++;
> - fully thread-safe without loss of speed.
> 
> The software is currently available in the form of three
> source files and a patch to the Zend Engine.

where are the .re2c files?

tc


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Re: [PHP-DEV] Reentrant C scanners for PHP

[Sascha Schumann]

On Thu, 5 Jul 2001, Jason Greene wrote:

> Sascha,
>
> This looks good.
> Is this going to be brought into php, or is it going to remain
> a separate project?

There is a concrete need for this system, so I'll push for
the inclusion of those scanners into PHP.  Because the code
is still in sort of alpha state (after one and a half day of
development), this will be completely optional initially.
Making it available through the usual PHP snapshots/releases
will broaden the userbase, so that we get a reasonable amount
of feedback which helps us to improve the system.

- Sascha Experience IRCG
  http://schumann.cx/http://schumann.cx/ircg


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Re: [PHP-DEV] Reentrant C scanners for PHP

[Jason Greene]

Sascha, 

This looks good.
Is this going to be brought into php, or is it going to remain a separate project?

Thanks,
Jason
- Original Message - 
From: "Sascha Schumann" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, July 05, 2001 6:08 PM
Subject: [PHP-DEV] Reentrant C scanners for PHP


> This is the first public release of fully reentrant C
> scanners for the PHP language and the INI system.  They
> can be used to replace the Flex-based implementations
> commonly found in the Zend Engine.
> 
> Features:
> 
> - Flexible I/O model; lays groundwork for fully supporting
>   modern web-servers such as Apache 2.0;
> - uses portable C only; significantly improves portability by
>   removing dependence on GNU extensions of C++;
> - fully thread-safe without loss of speed.
> 
> The software is currently available in the form of three
> source files and a patch to the Zend Engine.
> 
> http://schumann.cx/ngscan-0.1.tar.gz
> 
> To install, cd into the ngscan directory and run
> "make ZEND=../php4/Zend install", followed by a buildconf.
> 
> Because software already exists to eliminate the scan/parse
> process, speed was not a main concern.  The new language
> scanner is faster than the old one in all tested scenarios
> though.
> 
>  time savedlines what
> 10%500K  
> 15%500K  
> 40%1.5M  pure HTML
>   -500K  ZTS,(1)
> 87%500K  ZTS, 
> 99%1.5M  ZTS, pure HTML (2)
> 
> (1) crashed in vprintf, apparently some glibc/pthread issue
> (2) +4 minutes vs 800 milli-seconds
> 
> (user times taken from a command-line CGI, CFLAGS=-O,
> --enable-inline-optimization, gcc 2.95.3, Linux 2.4.6, glibc
> 2.2.3)
> 
> - Sascha Experience IRCG
>   http://schumann.cx/http://schumann.cx/ircg
> 
> 
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[PHP-DEV] Reentrant C scanners for PHP

[Sascha Schumann]

This is the first public release of fully reentrant C
scanners for the PHP language and the INI system.  They
can be used to replace the Flex-based implementations
commonly found in the Zend Engine.

Features:

- Flexible I/O model; lays groundwork for fully supporting
  modern web-servers such as Apache 2.0;
- uses portable C only; significantly improves portability by
  removing dependence on GNU extensions of C++;
- fully thread-safe without loss of speed.

The software is currently available in the form of three
source files and a patch to the Zend Engine.

http://schumann.cx/ngscan-0.1.tar.gz

To install, cd into the ngscan directory and run
"make ZEND=../php4/Zend install", followed by a buildconf.

Because software already exists to eliminate the scan/parse
process, speed was not a main concern.  The new language
scanner is faster than the old one in all tested scenarios
though.

 time savedlines what
10%500K  
15%500K  
40%1.5M  pure HTML
  -500K  ZTS,(1)
87%500K  ZTS, 
99%1.5M  ZTS, pure HTML (2)

(1) crashed in vprintf, apparently some glibc/pthread issue
(2) +4 minutes vs 800 milli-seconds

(user times taken from a command-line CGI, CFLAGS=-O,
--enable-inline-optimization, gcc 2.95.3, Linux 2.4.6, glibc
2.2.3)

- Sascha Experience IRCG
  http://schumann.cx/http://schumann.cx/ircg


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