Here the result of valgrind, thanks to Derick!
Now gurus can analyse the result.
Something wrong in implode() function?
Jean-Pierre
#!/usr/local/bin/php -c/usr/local/php/etc/php_cli.ini
<?php
$a= array (
'XXXXX_XXXX' => 'ZZZZ DDD2 17 C',
'XXXXXX_1' => '0.00',
'XXXXXXX_1' => '0.00',
'BBB' => '0.00',
'AAA' => '0.00',
'YYY_YYYYY' => '18.06',
'AAAAA_1' => '0',
'SSSSSS_PPP' => '17',
'PPPPPPPPPP' => 'C-AM',
'EEEEE_DATE' => '30 DEC 2003',
'TTTTTT_T' => ':',
'RRRRR_DATE' => '-',
'WWWDATE' => -1,
'STAMP' => '- :',
);
$xml=array();
for($i=0;$i<150;$i++){
$xml['ZZZZ6000R.Q'.$i]=$a;
}
$xxa=array_keys($xml);
echo ' BEFORE ';flush();
$xxi=implode(',',$xxa);
echo ' AFTER ';flush();
?>
shell> valgrind -v --leak-check=yes php bug_php.php --ug 434
==17820== Memcheck, a.k.a. Valgrind, a memory error detector for x86-linux.
==17820== Copyright (C) 2002-2003, and GNU GPL'd, by Julian Seward.
==17820== Using valgrind-2.0.0, a program supervision framework for
x86-linux.
==17820== Copyright (C) 2000-2003, and GNU GPL'd, by Julian Seward.
==17820== Command line:
==17820== php
==17820== bug_php.php
==17820== --ug
==17820== 434
==17820== Startup, with flags:
==17820== --suppressions=/usr/local/lib/valgrind/default.supp
==17820== -v
==17820== --leak-check=yes
==17820== Reading syms from /usr/local/bin/php
==17820== Reading syms from /lib/ld-2.2.4.so
==17820== Reading syms from /usr/local/lib/valgrind/vgskin_memcheck.so
==17820== Reading syms from /usr/local/lib/valgrind/valgrind.so
==17820== Reading syms from /lib/libcrypt-2.2.4.so
==17820== Reading syms from /lib/libpam.so.0.75
==17820== object doesn't have any debug info
==17820== Reading syms from /usr/lib/libpng.so.2.1.0.14
==17820== object doesn't have a symbol table
==17820== object doesn't have any debug info
==17820== Reading syms from /usr/lib/libz.so.1.1.4
==17820== object doesn't have any debug info
==17820== Reading syms from /lib/libdl-2.2.4.so
==17820== Reading syms from /usr/lib/libbz2.so.1.0.0
==17820== object doesn't have any debug info
==17820== Reading syms from /lib/libresolv-2.2.4.so
==17820== Reading syms from /lib/i686/libm-2.2.4.so
==17820== Reading syms from /lib/libnsl-2.2.4.so
==17820== Reading syms from /usr/local/lib/libcurl.so.2.0.2
==17820== Reading syms from /lib/libssl.so.0.9.6b
==17820== object doesn't have any debug info
==17820== Reading syms from /lib/libcrypto.so.0.9.6b
==17820== object doesn't have any debug info
==17820== Reading syms from /lib/i686/libc-2.2.4.so
==17820== Reading suppressions file: /usr/local/lib/valgrind/default.supp
==17820== Estimated CPU clock rate is 1615 MHz
==17820==
==17820== Reading syms from /lib/libnss_files-2.2.4.so
BEFORE ==17820== Invalid read of size 2
==17820== at 0x8186883: _zval_ptr_dtor
(/home/jpa/dev/php-4.3.4/Zend/zend_execute_API.c:289)
==17820== by 0x81A416F: zend_ptr_stack_clear_multiple
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.h:96)
==17820== by 0x81A1326: execute
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.c:1695)
==17820== by 0x8190A3D: zend_execute_scripts
(/home/jpa/dev/php-4.3.4/Zend/zend.c:884)
==17820== Address 0x4263EBA2 is 46 bytes inside a block of size 56 free'd
==17820== at 0x4002BE5B: free (vg_replace_malloc.c:231)
==17820== by 0x817F43E: _efree
(/home/jpa/dev/php-4.3.4/Zend/zend_alloc.c:265)
==17820== by 0x8187D4E: safe_free_zval_ptr
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.h:44)
==17820== by 0x81868B9: _zval_ptr_dtor
(/home/jpa/dev/php-4.3.4/Zend/zend_execute_API.c:292)
==17820==
==17820== Invalid read of size 2
==17820== at 0x818688C: _zval_ptr_dtor
(/home/jpa/dev/php-4.3.4/Zend/zend_execute_API.c:290)
==17820== by 0x81A416F: zend_ptr_stack_clear_multiple
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.h:96)
==17820== by 0x81A1326: execute
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.c:1695)
==17820== by 0x8190A3D: zend_execute_scripts
(/home/jpa/dev/php-4.3.4/Zend/zend.c:884)
==17820== Address 0x4263EBA2 is 46 bytes inside a block of size 56 free'd
==17820== at 0x4002BE5B: free (vg_replace_malloc.c:231)
==17820== by 0x817F43E: _efree
(/home/jpa/dev/php-4.3.4/Zend/zend_alloc.c:265)
==17820== by 0x8187D4E: safe_free_zval_ptr
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.h:44)
==17820== by 0x81868B9: _zval_ptr_dtor
(/home/jpa/dev/php-4.3.4/Zend/zend_execute_API.c:292)
==17820==
==17820== Invalid read of size 2
==17820== at 0x81868C5: _zval_ptr_dtor
(/home/jpa/dev/php-4.3.4/Zend/zend_execute_API.c:293)
==17820== by 0x81A416F: zend_ptr_stack_clear_multiple
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.h:96)
==17820== by 0x81A1326: execute
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.c:1695)
==17820== by 0x8190A3D: zend_execute_scripts
(/home/jpa/dev/php-4.3.4/Zend/zend.c:884)
==17820== Address 0x4263EBA2 is 46 bytes inside a block of size 56 free'd
==17820== at 0x4002BE5B: free (vg_replace_malloc.c:231)
==17820== by 0x817F43E: _efree
(/home/jpa/dev/php-4.3.4/Zend/zend_alloc.c:265)
==17820== by 0x8187D4E: safe_free_zval_ptr
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.h:44)
==17820== by 0x81868B9: _zval_ptr_dtor
(/home/jpa/dev/php-4.3.4/Zend/zend_execute_API.c:292)
AFTER ==17820==
==17820== ERROR SUMMARY: 4 errors from 3 contexts (suppressed: 3 from 1)
==17820==
==17820== 1 errors in context 1 of 3:
==17820== Invalid read of size 2
==17820== at 0x81868C5: _zval_ptr_dtor
(/home/jpa/dev/php-4.3.4/Zend/zend_execute_API.c:293)
==17820== by 0x81A416F: zend_ptr_stack_clear_multiple
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.h:96)
==17820== by 0x81A1326: execute
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.c:1695)
==17820== by 0x8190A3D: zend_execute_scripts
(/home/jpa/dev/php-4.3.4/Zend/zend.c:884)
==17820== Address 0x4263EBA2 is 46 bytes inside a block of size 56 free'd
==17820== at 0x4002BE5B: free (vg_replace_malloc.c:231)
==17820== by 0x817F43E: _efree
(/home/jpa/dev/php-4.3.4/Zend/zend_alloc.c:265)
==17820== by 0x8187D4E: safe_free_zval_ptr
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.h:44)
==17820== by 0x81868B9: _zval_ptr_dtor
(/home/jpa/dev/php-4.3.4/Zend/zend_execute_API.c:292)
==17820==
==17820== 1 errors in context 2 of 3:
==17820== Invalid read of size 2
==17820== at 0x818688C: _zval_ptr_dtor
(/home/jpa/dev/php-4.3.4/Zend/zend_execute_API.c:290)
==17820== by 0x81A416F: zend_ptr_stack_clear_multiple
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.h:96)
==17820== by 0x81A1326: execute
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.c:1695)
==17820== by 0x8190A3D: zend_execute_scripts
(/home/jpa/dev/php-4.3.4/Zend/zend.c:884)
==17820== Address 0x4263EBA2 is 46 bytes inside a block of size 56 free'd
==17820== at 0x4002BE5B: free (vg_replace_malloc.c:231)
==17820== by 0x817F43E: _efree
(/home/jpa/dev/php-4.3.4/Zend/zend_alloc.c:265)
==17820== by 0x8187D4E: safe_free_zval_ptr
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.h:44)
==17820== by 0x81868B9: _zval_ptr_dtor
(/home/jpa/dev/php-4.3.4/Zend/zend_execute_API.c:292)
==17820==
==17820== 2 errors in context 3 of 3:
==17820== Invalid read of size 2
==17820== at 0x8186883: _zval_ptr_dtor
(/home/jpa/dev/php-4.3.4/Zend/zend_execute_API.c:289)
==17820== by 0x81A416F: zend_ptr_stack_clear_multiple
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.h:96)
==17820== by 0x81A1326: execute
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.c:1695)
==17820== by 0x8190A3D: zend_execute_scripts
(/home/jpa/dev/php-4.3.4/Zend/zend.c:884)
==17820== Address 0x4263EBA2 is 46 bytes inside a block of size 56 free'd
==17820== at 0x4002BE5B: free (vg_replace_malloc.c:231)
==17820== by 0x817F43E: _efree
(/home/jpa/dev/php-4.3.4/Zend/zend_alloc.c:265)
==17820== by 0x8187D4E: safe_free_zval_ptr
(/home/jpa/dev/php-4.3.4/Zend/zend_execute.h:44)
==17820== by 0x81868B9: _zval_ptr_dtor
(/home/jpa/dev/php-4.3.4/Zend/zend_execute_API.c:292)
--17820--
--17820-- supp: 3 _dl_relocate_object/libc-2.2.4.so/_dl_catch_error(Cond)
==17820==
==17820== IN SUMMARY: 4 errors from 3 contexts (suppressed: 3 from 1)
==17820==
==17820== malloc/free: in use at exit: 924 bytes in 7 blocks.
==17820== malloc/free: 17447 allocs, 17440 frees, 3337750 bytes allocated.
==17820==
==17820== searching for pointers to 7 not-freed blocks.
==17820== checked 8276972 bytes.
==17820==
==17820== LEAK SUMMARY:
==17820== definitely lost: 0 bytes in 0 blocks.
==17820== possibly lost: 0 bytes in 0 blocks.
==17820== still reachable: 924 bytes in 7 blocks.
==17820== suppressed: 0 bytes in 0 blocks.
==17820== Reachable blocks (those to which a pointer was found) are not
shown.
==17820== To see them, rerun with: --show-reachable=yes
==17820==
--17820-- TT/TC: 0 tc sectors discarded.
--17820-- 9118 chainings, 0 unchainings.
--17820-- translate: new 12574 (211072 -> 2966498; ratio 140:10)
--17820-- discard 0 (0 -> 0; ratio 0:10).
--17820-- dispatch: 6850000 jumps (bb entries), of which 810191 (11%) were
unchained.
--17820-- 139/52227 major/minor sched events. 17402 tt_fast
misses.
--17820-- reg-alloc: 2068 t-req-spill, 558773+9763 orig+spill uis, 63291
total-reg-r.
--17820-- sanity: 140 cheap, 6 expensive checks.
--17820-- ccalls: 72861 C calls, 62% saves+restores avoided (270194
bytes)
--17820-- 95773 args, avg 0.89 setup instrs each (20064 bytes)
--17820-- 0% clear the stack (218583 bytes)
--17820-- 21133 retvals, 30% of reg-reg movs avoided (12658
bytes)
----- Original Message -----
From: "Derick Rethans" <[EMAIL PROTECTED]>
To: "Jean-Pierre Arneodo" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>; "Andi Gutmans" <[EMAIL PROTECTED]>
Sent: Wednesday, November 26, 2003 12:27 PM
Subject: Re: [PHP-DEV] Segmentation fault in v4.3.4
> On Wed, 26 Nov 2003, Jean-Pierre Arneodo wrote:
>
> > The script uses 3 extensions a lot:
> > - xml: EXPAT Version 1.95.6
> > - curl: libcurl/7.10.2 OpenSSL/0.9.6b zlib/1.1.4
> > - mysql: Client API version 4.0.15 (The MySQL server and lib on the
host
> > is a 4.0.16)
> >
> > 80 classes are involved, it is difficult to reduce the script to 20
lines.
> > The segfault is data depending. it doesn't happen every time.
> >
> > My first idea was to rebuild the cli to have a core dump on segfault we
can
> > analyse.
> > But with the --enable-debug configure flag, no segfault :-(
> > but some traces.
> >
> > Any direction to investigate?
>
> Have a look at the valgrind tool. Use it on a debug build of PHP like
> this:
>
> valgrind php <yourscript>
>
> it should spit out memory problems then.
>
> Derick
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