Segmentation fault - void asCScriptEngine::CallObjectMethod(...)

Carlos Luna · 2012-06-13T19:02:43

Hi, I'm getting a segmentation fault here: void asCScriptEngine::CallObjectMethod(...) { .....f(obj, param); // <- line 3373 - causes segmentation fault } "f" comes out with some weird value. This function is being called by the asCScriptEngine::WriteMessage(...). I'm registering my callback function like this: void scriptInterface::setMessageCallback(asIScriptEngine* compiler) { compiler->SetMessageCallback( asMETHOD(scriptInterface,MessageCallback),this,asCALL_THISCALL ); } virtual void scriptInterface::MessageCallback(const asSMessageInfo *msg) { // Implement a simple message callback function const char *type = "ERR "; if( msg->type == asMSGTYPE_WARNING ) type = "WARN"; else if( msg->type == asMSGTYPE_INFORMATION ) type = "INFO"; printf("%s (%d, %d) : %s : %s\n", msg->section, msg->row, msg->col, type, msg->message); } I have the feeling that the problem is here (file angelscript.h line 1024) // Template specialization template <> struct asSMethodPtr<SINGLE_PTR_SIZE> { template<class M> static asSFuncPtr Convert(M Mthd) { asSFuncPtr p; asMemClear(&p, sizeof(p)); asMemCopy(&p, &Mthd, SINGLE_PTR_SIZE); //<- after this, "f" (inside "p") gets wrong value // Mark this as a class method p.flag = 3; return p; } }; To make things even weirder, everything works as expected under Windows XP. I'm getting this error under Linux (Ubuntu) - using Code::Blocks as IDE. Any ideas? Carlos

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Started by Tzarls May 30, 2012 06:20 PM

15 comments, last by Tzarls 11 years, 10 months ago

WitchLord

4,834

June 02, 2012 02:44 AM

Thanks for the offer. I'll try to reproduce it on my mac first. If I don't succeed I'll definitely need help in figuring out how to make this work.

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Tzarls

1,411

Author

June 06, 2012 03:57 PM

Hi Andreas. Any success in finding the cause of the problem?

WitchLord

4,834

June 06, 2012 05:18 PM

Unfortunately I haven't had the time to look into this problem yet. I'll let you know when I do.

AngelCode.com - game development and more - Reference DB - game developer references
AngelScript - free scripting library - BMFont - free bitmap font generator - Tower - free puzzle game

WitchLord

4,834

June 09, 2012 07:44 PM

I've fixed this in revision 1338.

Thanks,
Andreas

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AngelScript - free scripting library - BMFont - free bitmap font generator - Tower - free puzzle game

Tzarls

1,411

Author

June 10, 2012 03:59 PM

Nice, thanks! Can I ask what the problem was?

WitchLord

4,834

June 10, 2012 04:56 PM

One of the internal functions for calling class methods didn't have the implementation to support virtual class methods. Somehow this had gone unnoticed for many years.

Here's the diff showing what was changed.

Regards,
Andreas

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AngelScript - free scripting library - BMFont - free bitmap font generator - Tower - free puzzle game

Tzarls

1,411

Author

June 13, 2012 07:02 PM

FWIW, I´ve just tested this fix in my original project and it works as expected. Thanks again!

Segmentation fault - void asCScriptEngine::CallObjectMethod(...)

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