Re: How to trace a crash bug?

Pierre Joye wrote:

hi, On Thu, Mar 25, 2010 at 8:49 AM, Thomas Hruska <thruska@cubiclesoft.com> wrote:

If you read the message, you would see "PHP 5.2.13". I didn't mention thread safe. Sorry. Forgot about that.

NTS does not work with Apache 2.2. The SAPI is not even available in the nts version.

does it crash with a hello world script, or only with your complex script. if its crash only with your script, then we cant help without a testcase.

That is what I am trying to do: Come up with either a simple test case OR pinpoint the crash in the C code. The simple test case route wasn't working, so I'm left with tracing the code. Hence my query.

Does it crash randomly, at start, or using a given request/script?

It isn't random - it crashes every time. Not at start - it is pretty far along in the code - I know exactly where in the PHP code (.php script) that PHP itself crashes. It only happens with a particular request/script and that script is 120KB in size.

I'm pretty sure I'm on the right list. I know C/C++ and want to hook into the PHP source with a C debugger (VS IDE, preferably). In other words, I'm going to be digging around in the engine to find this problem. Plus, this will give me a good look at the guts of PHP.

php windows internals may be better for this specific topic.

Okay. Well, I started the topic here.

ps: if you found a bug, open a ticket in the bugtracker.

Will do after I've got a reasonable test case and/or patch to work with. Simply saying "PHP crashes with complex code" isn't helpful to anyone. I was basically after a general guide for getting a Debug build that I can hook into with the VS debugger and stop on crash bugs from within the Apache module. Oh well. I'll try to build and will get back to you. I can't do anything else on this project until I figure out this bug. I probably should grab the latest snapshot just in case... Darn. Windows snapshot binaries are broken. Guess I'm building it anyway.

No need to at this stage. I'm almost sure it is a configuration problem, missing/wrong DLL or other similar problems.

I'm not doing anything particularly special when it crashes - calling a nearly identical function with a different number of parameters - it never makes it into the target function. A Debug build should pick up the problem. -- Thomas Hruska CubicleSoft President Ph: 517-803-4197 *NEW* MyTaskFocus 1.1 Get on task. Stay on task. http://www.CubicleSoft.com/MyTaskFocus/