topic STL string is causing problem in destructor in 64 bit itanium platform in Operating System - HP-UX

STL string is causing problem in destructor in 64 bit itanium platform

Vincent Paul S — Fri, 09 Jan 2009 15:51:14 GMT

Hi,

We are migrating from 32 bit version of the code to 64 bit version. The platform we use for 64 bit is Itanium hp-ux. Getting a strange error in basic_string class.

string httpBuffer;
....
....
//a sample block inside main
{
string sHeaders;

sHeaders=httpBuffer.substr(....);
}

When the flow is coming out of the block we are getting segmentation fault in basic_string destructor. Please help on this also let me know if you require more information.

Re: STL string is causing problem in destructor in 64 bit itanium platform

Mike Stroyan — Fri, 09 Jan 2009 16:49:09 GMT

This question is better suited to the
"HP-UX" > "languages and scripting" forum.

My first suspicion when a simple destructor segfaults is that some other code has corrupted the malloc information. That could happen because of overwritting a buffer or accessing freed memory. You could try compiling with aCC's +check option to see if it catches a problem.

Re: STL string is causing problem in destructor in 64 bit itanium platform

Vincent Paul S — Fri, 09 Jan 2009 17:22:48 GMT

can you please clarify how to use the option. I checked in this link: http://docs.hp.com/en/8/options.htm#option-index

I couldn't find the +check option. Please help.

Re: STL string is causing problem in destructor in 64 bit itanium platform

Dennis Handly — Sat, 10 Jan 2009 04:22:21 GMT

>When the flow is coming out of the block we are getting segmentation fault in basic_string destructor.

I need a stack trace. It might help if you recompile with +d first.
Is this application threaded?
What version of aCC6 are you using?

>I couldn't find the +check= option.

You need to use a later version of aC++:
http://docs.hp.com/en/14487/index.htm

>Mike: My first suspicion when a simple destructor segfaults is that some other code has corrupted the malloc information.

Right.
(I've asked the moderators to move this to the correct forum.)

Re: STL string is causing problem in destructor in 64 bit itanium platform

Vincent Paul S — Tue, 13 Jan 2009 16:34:47 GMT

We got the solution now. The problem is only with the flags.

Using -mt option in aCC compiler is working. The problem happened because the string libraries were not used in thread safe mode !!