[xdebug-dev] Bug 0000267: CLI segfaults when trace file is not writeable

The following bug has been REOPENED.
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http://bugs.xdebug.org/bug_view_page.php?bug_id=0000267
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Reporter: flotsam
Handler: derick
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Project: Xdebug
Bug ID: 267
Category: Usage problems
Reproducibility: always
Severity: minor
Priority: normal
Status: feedback
Operating System:
PHP Version: 5.2.1
Xdebug Version: 2.0.0rc3
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Date Submitted: 2007-05-13 20:10 CEST
Last Modified: 2007-05-13 20:35 CEST
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Summary: CLI segfaults when trace file is not writeable
Description:
A script lets xdebug write a tracefile. Executed via Apache, xdebug sets
owner.group of the tracefile to those of Apache (www-data.www-data on
Debian) and permissions to 644.

Executing the same script via PHP CLI segfaults w/o any useful info.
Strace shows its because the tracefile is not writeable. CLI executes as
current user, which is not www-data.

It would be nice if xdebug terminates gracefully with an explanatory
message instead of crashing ;)

Here's strace's last lines:

open("/tmp/init-parenchym.php.xt", O_RDWR|O_LARGEFILE) = -1 EACCES
(Permission denied)
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
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 derick - 2007-05-13 20:17 CEST
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I am quite positive this has been fixed in CVS already. For instructions on
how to use the CVS version, see: http://xdebug.org/install.php#source

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 flotsam - 2007-05-13 20:19 CEST
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And as I see now, the same is true vice versa: CLI creates trace file,
Apache is denied to overwrite it, child process segfaults.

(PHP Version is 5.2.2-1+b1)

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 flotsam - 2007-05-13 20:35 CEST
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RE: derick 2007-05-13 20:17

It's not. I just compiled the sources of 2.0.0RC4-dev and had the same bug
as described above.

Besides, make test reports:
Number of tests : 87 69
Tests skipped : 18 ( 20.7%) --------
Tests warned : 0 ( 0.0%) ( 0.0%)
Tests failed : 69 ( 79.3%) (100.0%)
Tests passed : 0 ( 0.0%) ( 0.0%)
---------------------------------------------------------------------
Time taken : 22 seconds

AHEM?

Bug History
Date Modified Username Field Change
======================================================================
2007-05-13 20:10flotsam New Bug
2007-05-13 20:10flotsam Bug Monitored: flotsam
2007-05-13 20:17derick Bugnote Added: 0000612
2007-05-13 20:17derick Assigned To => derick
2007-05-13 20:17derick Resolution open => fixed
2007-05-13 20:17derick Status new => resolved
2007-05-13 20:19flotsam Bugnote Added: 0000613
2007-05-13 20:35flotsam Bugnote Added: 0000614
2007-05-13 20:35flotsam Resolution fixed => reopened
2007-05-13 20:35flotsam Status resolved => feedback
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Received on Sun May 13 2007 - 20:35:53 BST