#16820 [Opn-Fbk]: hangs in multithreded environment (ZTS)
ID: 16820 Updated by: [EMAIL PROTECTED] Reported By: wmeler at wp-sa dot pl -Status: Open +Status: Feedback Bug Type: Scripting Engine problem Operating System: linux PHP Version: 4.3.3RC2-dev New Comment: Which linux distro are you testing with? glibc/kernel versions, etc? Previous Comments: [2003-07-28 04:58:06] wmeler at wp-sa dot pl Forgot to change status. And I'm almost sure that on windows shutdown functions won't be called. [2003-07-28 04:56:01] wmeler at wp-sa dot pl What is --worker=MPM ? Did you mean --mpm=worker ? If so, with php4-STABLE-200307280730 I got in error_log (configure options the same as before): [Mon Jul 28 11:41:58 2003] [notice] Apache/2.0.47 (Unix) PHP/4.3.3RC2-dev configured -- resuming normal operations [Mon Jul 28 11:42:28 2003] [notice] child pid 31209 exit signal Segmentation fault (11) [Mon Jul 28 11:42:30 2003] [notice] child pid 31233 exit signal Segmentation fault (11) [Mon Jul 28 11:42:31 2003] [notice] child pid 31252 exit signal Segmentation fault (11) [Mon Jul 28 11:42:33 2003] [notice] child pid 31271 exit signal Segmentation fault (11) Finally I saw the page I requested, but it was after 4 crashes - mozilla tries to reload page if server disconnects without response. [2003-07-21 04:18:51] wmeler at wp-sa dot pl patches work together http://strony.wp.pl/wp/wmeler/ [2003-07-21 03:12:52] [EMAIL PROTECTED] Yes, a patch is always appreciated.. [2003-07-21 02:46:15] wmeler at wp-sa dot pl As I said - heap corrupted. backtrace: #0 0x40393966 in _efree (ptr=0x42671030, __zend_filename=0x403e5840 /tmp/php4-STABLE-200307081130/Zend/zend_execute_API.c, __zend_lineno=291, __zend_orig_filename=0x403e5ca0 /tmp/php4-STABLE-200307081130/Zend/zend_variables.c, __zend_orig_lineno=44) at /tmp/php4-STABLE-200307081130/Zend/zend_alloc.c:259 #1 0x403a3e18 in _zval_dtor (zvalue=0x81d6018, __zend_filename=0x403e5840 /tmp/php4-STABLE-200307081130/Zend/zend_execute_API.c, __zend_lineno=291) at /tmp/php4-STABLE-200307081130/Zend/zend_variables.c:61 #2 0x4039b878 in _zval_ptr_dtor (zval_ptr=0x81d60d4, __zend_filename=0x403e5ca0 /tmp/php4-STABLE-200307081130/Zend/zend_variables.c, __zend_lineno=167) at /tmp/php4-STABLE-200307081130/Zend/zend_execute_API.c:291 #3 0x403a40d2 in _zval_ptr_dtor_wrapper (zval_ptr=0x81d60d4) at /tmp/php4-STABLE-200307081130/Zend/zend_variables.c:167 #4 0x403aa7a3 in zend_hash_destroy (ht=0x81bfa94) at /tmp/php4-STABLE-200307081130/Zend/zend_hash.c:543 #5 0x4039b361 in shutdown_executor (tsrm_ls=0x81aa7f0) at /tmp/php4-STABLE-200307081130/Zend/zend_execute_API.c:186 #6 0x403a546d in zend_deactivate (tsrm_ls=0x81aa7f0) at /tmp/php4-STABLE-200307081130/Zend/zend.c:666 #7 0x40374772 in php_request_shutdown (dummy=0x0) at /tmp/php4-STABLE-200307081130/main/main.c:995 #8 0x403c4923 in php_apache_request_dtor (r=0x81a6830, tsrm_ls=0x81aa7f0) at /tmp/php4-STABLE-200307081130/sapi/apache2handler/sapi_apache2.c:445 #9 0x403c4c4d in php_handler (r=0x81a6830) at /tmp/php4-STABLE-200307081130/sapi/apache2handler/sapi_apache2.c:541 #10 0x808269e in ap_run_handler (r=0x81a6830) at config.c:194 With my patch there are almost no problems. The problem is that shutdown function won't execute - EG(timeout) flag should be cleared before execution of shutdown function. I can correct it if you want. The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/16820 -- Edit this bug report at http://bugs.php.net/?id=16820edit=1
#16820 [Opn-Fbk]: hangs in multithreded environment (ZTS)
ID: 16820
Updated by: [EMAIL PROTECTED]
Reported By: wmeler at wp-sa dot pl
-Status: Open
+Status: Feedback
Bug Type: Scripting Engine problem
Operating System: linux
-PHP Version: 4.3.0-dev
+PHP Version: 4.3.3RC2-dev
New Comment:
Yes, a patch is always appreciated..
Previous Comments:
[2003-07-21 02:46:15] wmeler at wp-sa dot pl
As I said - heap corrupted.
backtrace:
#0 0x40393966 in _efree (ptr=0x42671030,
__zend_filename=0x403e5840
/tmp/php4-STABLE-200307081130/Zend/zend_execute_API.c,
__zend_lineno=291,
__zend_orig_filename=0x403e5ca0
/tmp/php4-STABLE-200307081130/Zend/zend_variables.c,
__zend_orig_lineno=44) at
/tmp/php4-STABLE-200307081130/Zend/zend_alloc.c:259
#1 0x403a3e18 in _zval_dtor (zvalue=0x81d6018,
__zend_filename=0x403e5840
/tmp/php4-STABLE-200307081130/Zend/zend_execute_API.c,
__zend_lineno=291) at
/tmp/php4-STABLE-200307081130/Zend/zend_variables.c:61
#2 0x4039b878 in _zval_ptr_dtor (zval_ptr=0x81d60d4,
__zend_filename=0x403e5ca0
/tmp/php4-STABLE-200307081130/Zend/zend_variables.c,
__zend_lineno=167) at
/tmp/php4-STABLE-200307081130/Zend/zend_execute_API.c:291
#3 0x403a40d2 in _zval_ptr_dtor_wrapper (zval_ptr=0x81d60d4)
at /tmp/php4-STABLE-200307081130/Zend/zend_variables.c:167
#4 0x403aa7a3 in zend_hash_destroy (ht=0x81bfa94)
at /tmp/php4-STABLE-200307081130/Zend/zend_hash.c:543
#5 0x4039b361 in shutdown_executor (tsrm_ls=0x81aa7f0)
at /tmp/php4-STABLE-200307081130/Zend/zend_execute_API.c:186
#6 0x403a546d in zend_deactivate (tsrm_ls=0x81aa7f0)
at /tmp/php4-STABLE-200307081130/Zend/zend.c:666
#7 0x40374772 in php_request_shutdown (dummy=0x0) at
/tmp/php4-STABLE-200307081130/main/main.c:995
#8 0x403c4923 in php_apache_request_dtor (r=0x81a6830,
tsrm_ls=0x81aa7f0)
at
/tmp/php4-STABLE-200307081130/sapi/apache2handler/sapi_apache2.c:445
#9 0x403c4c4d in php_handler (r=0x81a6830)
at
/tmp/php4-STABLE-200307081130/sapi/apache2handler/sapi_apache2.c:541
#10 0x808269e in ap_run_handler (r=0x81a6830) at config.c:194
With my patch there are almost no problems. The problem is that
shutdown function won't execute - EG(timeout) flag should be cleared
before execution of shutdown function.
I can correct it if you want.
[2003-07-21 02:07:48] wmeler at wp-sa dot pl
I took few days off. You know - holidays.
My config.nice :
'./configure' \
'--disable-all' \
'--with-apxs2=/usr/local/apache2/bin/apxs' \
'--with-config-file-path=/usr/local/apache2/conf/' \
'--enable-debug' \
$@
my script:
?
function shutdown() {
echo strlen($GLOBALS['a']);
}
set_time_limit(1);
register_shutdown_function('shutdown');
while (true) $a.='a';
I use apache 2.0.47 with config.nice:
./configure \
--enable-so \
--with-mpm=worker \
$@
Now I have SIGSEGVs instead of hangs :) - probably longjump hit in the
middle of emalloc/erealloc and memory cache is corrupted.
I used my own module before, witch uses shared variables and locks -
thats why it hanged. Now - without my module it just crashes :).
[2003-07-21 01:30:30] [EMAIL PROTECTED]
Still waiting for the configure line..
[2003-07-16 01:08:36] [EMAIL PROTECTED]
Could you also tell us what configure line you have used?
(so we can try to reproduce this too before applying any patches..)
[2003-07-11 03:15:05] wmeler at wp-sa dot pl
that funny restrictions ... try this:
http://strony.wp.pl/wp/wmeler/execution-timeout.patch.html
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/16820
--
Edit this bug report at http://bugs.php.net/?id=16820edit=1
#16820 [Opn-Fbk]: hangs in multithreded environment (ZTS)
ID: 16820
Updated by: [EMAIL PROTECTED]
Reported By: wmeler at wp-sa dot pl
-Status: Open
+Status: Feedback
Bug Type: Scripting Engine problem
Operating System: linux
PHP Version: 4.3.0-dev
New Comment:
Could you also tell us what configure line you have used?
(so we can try to reproduce this too before applying any patches..)
Previous Comments:
[2003-07-11 03:15:05] wmeler at wp-sa dot pl
that funny restrictions ... try this:
http://strony.wp.pl/wp/wmeler/execution-timeout.patch.html
[2003-07-11 02:54:49] [EMAIL PROTECTED]
That url gives 403..was it incorrect..?
[2003-07-11 02:40:47] wmeler at wp-sa dot pl
script like:
?
set_time_limit(1);
while (TRUE) {
$a.='a';
}
?
should hang server in ZTS mode on linux after few reloads.
You can download my patch from
http://strony.wp.pl/wp/wmeler/execution-timeout.patch
It is for erlier version, but it applies with offsets.
[2003-07-10 19:54:27] [EMAIL PROTECTED]
Can you please provide either a testcase for this so we can actually
reproduce this or a patch to fix it?
[2002-10-21 11:19:40] [EMAIL PROTECTED]
Updated version info. (assuming the last comment was based on the
snapshot)
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/16820
--
Edit this bug report at http://bugs.php.net/?id=16820edit=1
#16820 [Opn-Fbk]: hangs in multithreded environment (ZTS)
ID: 16820
Updated by: [EMAIL PROTECTED]
Reported By: wmeler at wp-sa dot pl
-Status: Open
+Status: Feedback
Bug Type: Scripting Engine problem
Operating System: linux
PHP Version: 4.3.0-dev
New Comment:
That url gives 403..was it incorrect..?
Previous Comments:
[2003-07-11 02:40:47] wmeler at wp-sa dot pl
script like:
?
set_time_limit(1);
while (TRUE) {
$a.='a';
}
?
should hang server in ZTS mode on linux after few reloads.
You can download my patch from
http://strony.wp.pl/wp/wmeler/execution-timeout.patch
It is for erlier version, but it applies with offsets.
[2003-07-10 19:54:27] [EMAIL PROTECTED]
Can you please provide either a testcase for this so we can actually
reproduce this or a patch to fix it?
[2002-10-21 11:19:40] [EMAIL PROTECTED]
Updated version info. (assuming the last comment was based on the
snapshot)
[2002-10-21 00:18:54] wmeler at wp-sa dot pl
Well, it seems that nothing has changed - on timeout it still does
longjmp without care of semaphores. Locks won't be freed so it will
hang.
As I wrote few months ago, signal handler should only set EG(timeout)
flag.
[2002-10-20 01:00:03] php-bugs at lists dot php dot net
No feedback was provided for this bug for over 2 weeks, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to Open.
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/16820
--
Edit this bug report at http://bugs.php.net/?id=16820edit=1
#16820 [Opn-Fbk]: hangs in multithreded environment (ZTS)
ID: 16820 Updated by: [EMAIL PROTECTED] Reported By: wmeler at wp-sa dot pl -Status: Open +Status: Feedback Bug Type: Scripting Engine problem Operating System: linux PHP Version: 4.3.0-dev New Comment: Can you please provide either a testcase for this so we can actually reproduce this or a patch to fix it? Previous Comments: [2002-10-21 11:19:40] [EMAIL PROTECTED] Updated version info. (assuming the last comment was based on the snapshot) [2002-10-21 00:18:54] wmeler at wp-sa dot pl Well, it seems that nothing has changed - on timeout it still does longjmp without care of semaphores. Locks won't be freed so it will hang. As I wrote few months ago, signal handler should only set EG(timeout) flag. [2002-10-20 01:00:03] php-bugs at lists dot php dot net No feedback was provided for this bug for over 2 weeks, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to Open. [2002-10-03 22:43:06] [EMAIL PROTECTED] Please try using this CVS snapshot: http://snaps.php.net/php4-latest.tar.gz For Windows: http://snaps.php.net/win32/php4-win32-latest.zip [2002-06-16 00:11:29] [EMAIL PROTECTED] reclassified The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/16820 -- Edit this bug report at http://bugs.php.net/?id=16820edit=1
#16820 [Opn-Fbk]: hangs in multithreded environment (ZTS)
ID: 16820 Updated by: [EMAIL PROTECTED] Reported By: [EMAIL PROTECTED] -Status: Open +Status: Feedback Bug Type: Scripting Engine problem Operating System: linux PHP Version: 4.2.0 New Comment: Please try using this CVS snapshot: http://snaps.php.net/php4-latest.tar.gz For Windows: http://snaps.php.net/win32/php4-win32-latest.zip Previous Comments: [2002-06-16 00:11:29] [EMAIL PROTECTED] reclassified [2002-04-25 06:24:51] [EMAIL PROTECTED] If you have bad luck and get termination signal (after exceding max_execution_time limit) in some critical section locks won't be released !!! (because of usage of longjmp function in zend_bailout) eg. when signal come when process is executing malloc in ealloc (Zend/zend_alloc.c) function it won't release internal lock, and shutdown functions that free memory will hang as well as other threads. You probably can prevent it with HANDLE_BLOCK_INTERRUPTIONS macro, but it isn't good solution. I suggest that zend_timeout function should set EG(timed_out) flag, as it is done in windows environment. Flag should be checked in execute function (Zend/zend_execute.c) in main loop. waiting for your patch (my is working, but is ugly coded;-)), Wojtek -- Edit this bug report at http://bugs.php.net/?id=16820edit=1
