Mike Magruder
f4bed8899a
We force users to use the create() methods of StaticResultWaitHandle and StaticExceptionWaitHandle, which properly set m_resultOrException. However, deserialization will use the normal constructor which was failing to initialize the field. The destructor, then, would operate on random data. This broke hphpd when a stack trace had one of these objects on it somewhere. The 'where' command would succeed, but the next command (which deletes the stack trace), would segfault in the wait handle's destructor. I think it's fair to not serialize this member. It's not exposed thru PHP except via joining with the wait handle, and I think an argument can be made that it's just plain wrong to join with a deserialized copy of a wait handle. So I've just initialized it to a reasonable default.
HipHop VM for PHP 
HipHop VM (HHVM) is a new open-source virtual machine designed for executing programs written in PHP. HHVM uses a just-in-time compilation approach to achieve superior performance while maintaining the flexibility that PHP developers are accustomed to. HipHop VM (and before it HPHPc) has realized > 5x increase in throughput for Facebook compared with Zend PHP 5.2.
HipHop is most commonly run as a standalone server, replacing both Apache and modphp.
Installing
You can install a prebuilt package or compile from source.
Running
You can run standalone programs just by passing them to hhvm: hhvm my_script.php.
HipHop bundles in a webserver. So if you want to run on port 80 in the current directory:
sudo hhvm -m server
For anything more complicated, you'll want to make a config.hdf and run sudo hhvm -m server -c config.hdf.
Contributing
We'd love to have your help in making HipHop better. If you run into problems, please open an issue, or better yet, fork us and send a pull request. Join us on #hhvm on freenode.
If you want to help but don't know where to start, try fixing some of the Zend tests that don't pass. You can run them with hphp/test/run. When they work, move them to zend/good and send a pull request.
Before changes can be accepted a Contributors Licensing Agreement (pdf - print, sign, scan, link) must be signed.
Licence
HipHop VM is licensed under the PHP and Zend licenses except as otherwise noted.