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IDProjectCategoryView StatusDate SubmittedLast Update
0000670Xdebugpublic2011-03-09 00:292011-03-10 15:35
Reportercanuckistani Assigned To 
PrioritynormalSeveritycrashReproducibilityalways
Status closedResolutionfixed 
PlatformLinuxOSUbuntu OS Version10.10
Product Version2.1.0 
Summary0000670: Segfault in Xdebug when used for code coverage with PHPUnit
Description

Disclaimer: I can't see a way to re-open 0000661, so logging this. Annoying, I know.

Steps To Reproduce
  1. built PHP 5.3.5 with --enable-debug
  2. installed Xdebug and PHPUnit via pear / pecl
  3. ran my unit tests using gdb, specifically a particular test that uses the Rediska redis client:

https://github.com/Shumkov/Rediska

PHP always segfaults, the backtrace from gdb seems to implicate xdebug code:

#0 0x00007ffff611c5c3 in xdebug_set_in_ex (set=0x1f52a60, position=1189155543, noisy=1) at /tmp/pear/temp/xdebug/xdebug_set.c:72
#1 0x00007ffff610abbe in xdebug_analyse_branch (opa=0x1f37638, position=1189155543, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:390
0000002 0x00007ffff610ac21 in xdebug_analyse_branch (opa=0x1f37638, position=133, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:408
0000003 0x00007ffff610ac21 in xdebug_analyse_branch (opa=0x1f37638, position=131, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:408
0000004 0x00007ffff610ac21 in xdebug_analyse_branch (opa=0x1f37638, position=129, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:408
0000005 0x00007ffff610ac21 in xdebug_analyse_branch (opa=0x1f37638, position=119, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:408
0000006 0x00007ffff610ac21 in xdebug_analyse_branch (opa=0x1f37638, position=114, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:408
0000007 0x00007ffff610ac5d in xdebug_analyse_branch (opa=0x1f37638, position=111, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:410
0000008 0x00007ffff610ac21 in xdebug_analyse_branch (opa=0x1f37638, position=101, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:408
0000009 0x00007ffff610ac5d in xdebug_analyse_branch (opa=0x1f37638, position=88, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:410
0000010 0x00007ffff610ac21 in xdebug_analyse_branch (opa=0x1f37638, position=85, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:408
0000011 0x00007ffff610ac21 in xdebug_analyse_branch (opa=0x1f37638, position=79, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:408
0000012 0x00007ffff610ac21 in xdebug_analyse_branch (opa=0x1f37638, position=78, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:408
0000013 0x00007ffff610ac21 in xdebug_analyse_branch (opa=0x1f37638, position=74, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:408
0000014 0x00007ffff610ac5d in xdebug_analyse_branch (opa=0x1f37638, position=44, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:410
0000015 0x00007ffff610ac5d in xdebug_analyse_branch (opa=0x1f37638, position=35, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:410
0000016 0x00007ffff610ac21 in xdebug_analyse_branch (opa=0x1f37638, position=31, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:408
0000017 0x00007ffff610ac21 in xdebug_analyse_branch (opa=0x1f37638, position=27, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:408
0000018 0x00007ffff610ac21 in xdebug_analyse_branch (opa=0x1f37638, position=18, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:408
0000019 0x00007ffff610ac5d in xdebug_analyse_branch (opa=0x1f37638, position=6, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:410
0000020 0x00007ffff610ad5a in xdebug_analyse_oparray (opa=0x1f37638, set=0x1f52a60) at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:444
0000021 0x00007ffff610ae92 in prefill_from_oparray (fn=0x1dd1428 "/data/redis/Rediska/library/Rediska/KeyDistributor/ConsistentHashing.php", opa=0x1f37638)
at /tmp/pear/temp/xdebug/xdebug_code_coverage.c:473

( more lines after this, see file attachement )

Additional Information

The PHP file that seems to cause this crash is:

https://github.com/Shumkov/Rediska/raw/master/library/Rediska/KeyDistributor/ConsistentHashing.php

export USE_ZEND_ALLOC=0 mitigates this issue, so it should be closed, but either this is a bug in PHP (?) or Xdebug is not functioning.

TagsNo tags attached.
Operating System
PHP Version5.3.5

Activities

derick

2011-03-09 21:39

administrator   ~0001682

Hi!

I've good news and bad news. The good news is that I can fix this easily, and a fix will make its way into SVN soon. The bad news is that you have a bug in your code that makes Xdebug crash ;-)

Line 146 of ConsistentHashing.php, has:

145 if ($looped) {
146 break 2;
147 }

You can't do "break 2" there, because you're only in one nested loop (the while on line 120).

cheers,
Derick

canuckistani

2011-03-09 22:47

reporter   ~0001683

Sweet! I was too code-blind to see that yesterday reading the rediska code ( which isn't mine anyway ). I'll address that issue one the Rediska github repo.

derick

2011-03-10 15:35

administrator   ~0001684

Fixed in SVN for 2.1.1 and 2.2.0