0000817: Missing arguments in function traces - MantisBT

ID	Project	Category	View Status	Date Submitted	Last Update
0000817	Xdebug	Uncategorized	public	2012-04-23 10:13	2012-04-28 16:23

Reporter	ngaur	Assigned To
Priority	normal	Severity	major	Reproducibility	always
Status	resolved	Resolution	not fixable
OS	Debian Gnu/Linux	OS Version	Lenny
Target Version	2.2.0

Summary	0000817: Missing arguments in function traces
Description	In my funtion traes, the values of argumetns passed to functions appear as '???' xdebug config zend_extension=/usr/lib/php5/20060613/xdebug2.2.so xdebug.trace_enable_trigger=1 xdebug.trace_output_name=xdebug_trace.%t.%p xdebug.collect_params=4 Sample output: 0.0008 124584 -> drupal_bootstrap($phase = ???) /var/local/www/xxxxx/htdocs/index.php:15 0.0009 125224 -> _drupal_bootstrap($phase = ???) /var/local/www/xxxxx/htdocs/includes/bootstrap.inc:1109 0.0009 125840 -> drupal_unset_globals() /var/local/www/xxxxx/htdocs/includes/bootstrap.inc:1119 0.0009 125840 -> ini_get(???) /var/local/www/xxxxx/htdocs/includes/bootstrap.inc:346 0.0009 125840 -> timer_start($name = ???) /var/local/www/xxxxx/htdocs/includes/bootstrap.inc:1121 0.0010 126280 -> microtime() /var/local/www/xxxxx/htdocs/includes/bootstrap.inc:232 0.0010 126352 -> explode(???, ???) /var/local/www/xxxxx/htdocs/includes/bootstrap.inc:232 0.0010 127784 -> conf_init() /var/local/www/xxxxx/htdocs/includes/bootstrap.inc:1123 0.0010 130136 -> strtolower(???) /var/local/www/xxxxx/htdocs/includes/bootstrap.inc:385 0.0011 136008 -> drupal_valid_http_host($host = ???) /var/local/www/xxxxx/htdocs/includes/bootstrap.inc:386 0.0011 136280 -> preg_match(???, ???) /var/local/www/xxxxx/htdocs/includes/bootstrap.inc:367 0.0011 136280 -> conf_path($require_settings = ???, $reset = ???) /var/local/www/xxxxx/htdocs/includes/bootstrap.inc:398 require statements do show the name of the require'd file.
Steps To Reproduce	I haven't tried it on other systems yet. Every trace I do displays the problem. I compiled from source. xdebug 2.2.0RC1. Compilation exactly as per instructions in README. issue appears on all traces.
Additional Information	I couldn't see this as an existing issue, but it's not the easiest one to search for.
Tags	No tags attached.

Operating System	linux
PHP Version	5.2.6

derick 2012-04-23 10:55 administrator ~0002078	Can you post your phpinfo() output in an attachment to this bug please?

ngaur 2012-04-23 11:37 reporter ~0002081	phpinfo uploaded as requested.

derick 2012-04-23 12:02 administrator ~0002082	Hmm, the only thing I can think of is maybe the suhosin patch, but I've not heard of that doing this before. Could you please try the recently released 2.2.0RC2?

ngaur 2012-04-23 14:37 reporter ~0002083	Tried RC2. No change.

ngaur 2012-04-24 17:30 reporter ~0002089	I've just gone through recreating this in a clean virtual machine. The problem still presents itself. The suhosin patch is present - it comes as standard in the debian package for lenny, though it's been removed in later debian distributions. I kept the test case as simple as I could: Installed a debian lenny virtual machine from http://www.visoracle.com/vm/debian50/ (VMs for lenny are geting hard to find, so not quite as minimal as I would otherwise have chosen). updated to the latest of all packages available at archive.debian.org. (lenny is out of support, so this will never change). Added nginx and php5-{cli,cgi,common,dev} Compiled and installed xdebug 2.2.0RC2. Configured xdebug exactly as per my description inthe original bug report, except for the file name of the xdebug library. added a startup script for php-cgi, which effectively starts php like so: USER=www-data PATH=/usr/bin PHP_FCGI_CHILDREN=15 PHP_FCGI_MAX_REQUESTS=60 /usr/bin/php-cgi -b 127.0.0.1:9000 configured nginx to send ".php" requests to php. nothing special. wrote a very simple php script which defines a function and calls it. triggered a trace via Cookie XDEBUG_TRACE=1

ngaur 2012-04-24 18:08 reporter ~0002090	I don't think suhosin is the culprit. In the virtual machine referred to above, I removed php5-{cgi,cli,common,dev}, and installed a version of php5 without suhosin. It's php-5.2.9, and the packages are in the zipfile linked from http://www.net-tools.org/web/index.php?option=com_content&view=article&id=118:php5-compiled-for-debian-lenny-without-suhosin-patch&catid=20:scripts&Itemid=40. The bug is still present.

ngaur 2012-04-24 18:45 reporter ~0002091	Suhosin is definitely not the culprit. I removed php from my VM again, and installed the version from http://archives.dotdeb.org/dists/lenny/php5/5.3.10/binary-i386/ This is php5.3.10, with the suhosin patch. I recompiled xdebug, and re-tested. The bug does not present itself in this test. This may be a way out of the problem for me in future, but it'll be a bit of a process to upgrade php on the live server.

derick 2012-04-28 16:23 administrator ~0002116	I've figure out what this is: overzealos optimisations with the lenny compiler. If Xdebug gets compiled with -O2, I get the ??? as well. If I compile with -O0 or -O1 all is well. The workaround in this case is, after running "phpize" edit the makefile and change CFLAGS=-g -O2 to CFLAGS=-g -O1 before running make. I'm going to close this as this is not something I can fix in Xdebug.