View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000028 | Xdebug | Usage problems (Wrong Results) | public | 2003-11-11 12:17 | 2004-09-15 10:08 |
| Reporter | melvyn | Assigned To | derick | ||
| Priority | normal | Severity | crash | Reproducibility | always |
| Status | resolved | Resolution | unable to reproduce | ||
| Product Version | |||||
| Target Version | Fixed in Version | ||||
| Summary | 0000028: xdebug_llist_init (l=0x0, dtor=0x190b7d6c <hash_element_dtor>) | ||||
| Description | Reproducable crash. Requesting a 'Data Dictionary' on a database in phpMyAdmin 2.5.4 triggers the bug. I currently have no time to further investigate the actual trigger condition, but demonstrative patch is below | ||||
| Additional Information | Index: xdebug_llist.c =================================================================== RCS file: /repository/xdebug/xdebug_llist.c,v retrieving revision 1.4 diff -u -r1.4 xdebug_llist.c --- xdebug_llist.c 20 Feb 2003 14:30:54 -0000 1.4 +++ xdebug_llist.c 11 Nov 2003 11:15:22 -0000 @@ -29,6 +29,11 @@ xdebug_llist *l; l = malloc(sizeof(xdebug_llist)); + if ( !l ) + { + /* do proper clean up here */ + exit(8); + } xdebug_llist_init(l, dtor); return l; | ||||
| Tags | No tags attached. | ||||
| Operating System | FreeBSD ghost.lan.webteckies.org 4.9-RC FreeBSD 4.9-RC 0000006: Wed Oct 1 07:44:36 CEST 2003 root@ghost.lan.webteckies.org:/usr/obj/usr/src/sys/GHOST i386 | ||||
| PHP Version | 4.3.4-dev | ||||
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I could not reproduce this with 4.3.5-dev, xdebug-2.0dev (current CVS) and phpmyadm 2.5.4. Can you please tell me which xdebug related php.ini settings you made and whether you have a debug or non-debug php build? |
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Try --enable-memory-limit, default setting (8M) and a large enough number of tables (in my case 41). I've screwed around with my php install in the mean time. Xdebug version above was used, but 1.2.0 was also affected. I thought the bug would be clear from the patch, that the success of the malloc was not checked. I found that backtracing. AFAIR auto_trace and default_enable we're on. No phpdebug build. |
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I'm pretty sure I've found the cause: 28094 www 2 0 320M 305M sbwait 0:09 10.27% 9.91% httpd 28126 www 2 0 22176K 14552K sbwait 0:07 25.31% 23.78% httpd The first run is with 'autotrace' on. The second one, without. Apache was stopped and started before the first run and in between the runs. Both requested the data-dictionary of the same database. Since I've now compiled php without memory limit, I do not hit the bug anymore but 300M difference for autotrace seems to be a bit much - especially for a webserver. If there is no bug here, then maybe autotrace should be disabled when sapi != cli. # php -i | grep xdebug xdebug xdebug support => enabled xdebug.auto_profile => Off => Off xdebug.auto_profile_mode => 0 => 0 xdebug.auto_trace => Off => Off xdebug.collect_params => Off => Off xdebug.default_enable => On => On xdebug.dump.COOKIE => no value => no value xdebug.dump.ENV => no value => no value xdebug.dump.FILES => no value => no value xdebug.dump.GET => no value => no value xdebug.dump.POST => no value => no value xdebug.dump.REQUEST => no value => no value xdebug.dump.SERVER => no value => no value xdebug.dump.SESSION => no value => no value xdebug.dump_once => On => On xdebug.dump_undefined => Off => Off xdebug.manual_url => http://www.php.net => http://www.php.net xdebug.max_nesting_level => 64 => 64 xdebug.output_dir => /tmp => /tmp xdebug.remote_enable => Off => Off xdebug.remote_handler => gdb => gdb xdebug.remote_host => localhost => localhost xdebug.remote_mode => req => req xdebug.remote_port => 17869 => 17869 |
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I'm going to mark this bug as resolved, as I'm still unable to duplicate it. If you have more information about it, feel free to reopen it. Besides that, the tracing in Xdebug 2.0 is much better anyway (and doesn't use much memory at all!) Derick |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2003-11-11 12:17 | melvyn | New Issue | |
| 2003-12-01 15:44 | derick | Note Added: 0000067 | |
| 2003-12-01 15:44 | derick | Status | new => feedback |
| 2003-12-02 01:28 | melvyn | Note Added: 0000071 | |
| 2003-12-02 21:56 | melvyn | Note Added: 0000072 | |
| 2004-09-15 10:08 | derick | Status | feedback => resolved |
| 2004-09-15 10:08 | derick | Resolution | open => unable to reproduce |
| 2004-09-15 10:08 | derick | Assigned To | => derick |
| 2004-09-15 10:08 | derick | Note Added: 0000192 | |
| 2016-07-31 13:36 | derick | Category | Usage problems => Usage problems (Crashes) |
| 2016-07-31 13:38 | derick | Category | Usage problems (Crashes) => Usage problems (Wrong Results) |
