This replaces the GUI element used for execution timeout handling
on Windows. Instead a timer queue technique is used, which is indeed
a thread pool. A timer queue timer is a lightweight object handled
but that thread pool and the timer thread spends most of the time
sleeping and waiting for an alert.
Please note also that this introduces neither binary nor source
breach. The custom timeout thread functions are deleted, however
they was not exported throug DLL, so couldn't be used by any
external code. As well they couldn't be used anywhere in the core
except in executor api, because those custom timeout thread
functions they used to operate on static variables which would
be overwritten (and that would blow).
So instead a relatively modern technique is used for the timeout
handling. It's still not perfect because the executor still has to
check EX(timed_out). This can be a topic for an improvement in
master. But brobably can be tricky as currently it seems to be not
possible to signal an individual thread. Also note another issue
that static variables aren't thread safe, but the current timer
implementation is.
* PHP-5.4:
update NEWS
Only destruct if EG(active) in zend_shutdown(). (bug #65463, #66036)
Fix typo from commit 32314f6b6
Fix destruction order in zend_shutdown (bug #65463, #66036)
* pull-request/770:
Only destruct if EG(active) in zend_shutdown(). (bug #65463, #66036)
Fix typo from commit 32314f6b6
Fix destruction order in zend_shutdown (bug #65463, #66036)
If Apache or a similar SAPI receives a signal during PHP processing
it calls zend_shutdown() without calling shutdown_executor().
#65463: If a module like Gearman or Memcached is loaded,
in the unfixed version it is unloaded by zend_destroy_modules() before the
CG(CLASS_TABLE) is destructed. When CG(CLASS_TABLE) is destructed,
any pointers to methods (specifically around destruction) in the unloaded
module's .so are now dangling and the process segfaults.
#66036: Any subclasses of an internal class like ArrayObject need
to be destructed in order: subclass first and then the internal class. In the
unfixed version zend_shutdown() clears the CG(CLASS_TABLE) from the head
of the list onwards, so internal classes are destructed first and user-defined
classes last. Internal classes are alloc/deallocated with malloc/free while
user-defined classes with emalloc/efree. If there's shared data between them
then efree() could be called instead of free() leading to a seg-fault.
This piece of code seems to retain compatibility with some windows
versions before 2000. Today it's not relevant anymore and only
produces a warning C4273 because of the conflicting prototype. In
VC9 the declaration is present in winbase.h:4142, but available
is it already in winxp. Here's the doc link
http://msdn.microsoft.com/en-us/library/windows/desktop/ms680345(v=vs.85).aspx
Also fixes duplicate bugs #54054 and #42098.
Furthermore this fixes incorrect error messages thrown from code
running inside an error handler when a compilation is in progress.
The error file and line are now correctly associated with the
file/line of the executor, rather than the compiler.
Without this fix, a webpage using eval() may return code 500. That might display
fine and the 500 go unnoticed, but using AJAX or wget, the 500 will cause problems.
