Saxon » SaxonC

I have managed to reproduce the error you are getting on my centos machine when I run the php script in a browser. It works fine when I run on the commandline.

PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/modules/saxon.so' - libsaxonhec.so: cannot enable executable stack as shared object requires: Permission denied in Unknown on line 0

[Tue Mar 15 01:24:36 2016] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.4.45 configured -- resuming normal operations
[Tue Mar 15 01:24:40 2016] [error] [client ::1] PHP Fatal error:  Class 'Saxon\\SaxonProcessor' not found in /var/www/html/saxon.php on line 18

I will investigate the issue and report back shortly.

The root cause of the error you received is because of SELinux is enforced/enabled on your machine.

One solution is to disable the SELinux by opening the file /etc/selinux/config and changing “SELINUX=enforcing” to “SELINUX=disabled”. A reboot is required.

However, in terms of security on your system this might be a bad option. See manual on SELinux: https://wiki.centos.org/HowTos/SELinux

A better solution is to change the security context of the Saxon libraries using the command chcon.

On my system I had to do the following:

Ran:

ls -alZ /usr/lib

What was of interest was for most of the libraries it states "system_u:object_r:lib_t" wheras for libsaxonhec.so it was "unconfined_u:object_r:lib_t:s0". I changed this to the following:

chcon system_u:object_r:lib_t:s0 /usr/lib/libsaxonhec.so

Similar change required for the php saxon module:

chcon system_u:object_r:lib_t:s0 /usr/lib/php/modules/saxon.so

Also please ensure the environment variable LD_LIBRARY_PATH has been set in /etc/sysconfig/httpd (for Centos). For a 32-bit machine add the following at the end of the file:

export LD_LIBRARY_PATH=/usr/lib/rt/lib/i386:/usr/lib/rt/lib/i386/jetvm:$LD_LIBRARY_PATH

When I run chcon commands, error changed to

JET RUNTIME HAS DETECTED UNRECOVERABLE ERROR: system exception at 0x00b105d5

Please, contact the vendor of the application.

Extra information about error is saved in the "/tmp/jet_err_2493.txt" file.

Fatal Error: Crash during termination.

Update:

There still seems to be an underlying problem here. The page seems to load as normal. But if we inspect the apache error log file it shows up the same Jet message mentioned in comment #0. I have reproduced it on my ubuntu machine so will be investigating what is happening.

Bug fixed and committed to subversion.

The problem was because of the multiple HTTP PHP requests in Saxon/C we get more than one call of the methods JNI_CreateJavaVM and finalizeJavaRT. We should only call these methods ones in the same process.

The fix was to prevent multiple calls to these JVM methods by using static variables, similar to what was done in Saxon/C 0.3.1.

Fix will be available in the next maintenance release.

When the PHP MSHUTDOWN is called a seg error is thrown. The SaxonProcessor release method seems not to be in a clean state. Investigating the issue now.

The MSHUTDOWN problem is in related. We have removed the release method call as it is not needed.

Bug fix applied in the Saxon/C 1.0.1 maintenance release.