Premature destruction of object in Android

Artur Moreira · 2013-03-12T08:04:12

Hello, Until yesterday I used an older version of AngelScript, from around June 2012 and everything worked fine for my purpose. All scripts ran consistently in android + desktop systems, as far as i was concerned. However, I needed the ability to make nested function calls, and therefore needed the new Push/Pop State functionality. I did the update in today's morning to the latest version of angelscript, put it to run pretty much the same way I used to before but a obscure bug has been introduced. I've tried everything and I can't solve it. I have a custom type named UIButton, which is a banal ref type, meant to be created and managed by scripts. As I always did, I have a UIButton button; declared globally in a script, which works fine in windows. It is instanced with the context and only destroyed when i release the context at shutdown. Nevertheless, against the previous behavior, while I run the same script in android, it crashes my process because button is not valid in any time. I wrapped some logs around the ResetGlobalVars function and in the UIButton constructor and destructor, and here's the output: -> Going to initialize global vars -> UIButton created -> UIButton destroyed -> Finished initializing global vars As you can see, within the call of ResetGlobalVars, the button is both created and destroyed. I have even tried to call this function several times in a row and the log is always the same, the UIButton instance doesn't stay alive no matter what, in android. About compilation of the library, for windows it was compiled as-is, changing only the runtime to Multithreaded (Debug) DLL . For android its the same deal,but added AS_MAX_COMPATIBILITY so the generic calls are used. (couldn't make the .S arm code compile yet). Any help is appreciated, I need to solve this as soon as possible. Granting a safe sandbox environment from scripts is essential to my software. Bonus Question: Is it possible to avoid crashes when calling a method on a null reference? Thanks And to the writer of the library, amazing job, its great beyond words, expect to see it in a pretty cool project soon! :))

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Started by DevilWithin March 07, 2013 02:42 AM

34 comments, last by AgentC 11 years, 1 month ago

WitchLord

4,834

March 08, 2013 08:53 PM

@quarnster: Thanks a lot. I would probably not have found that one, at least not anytime soon. Does it matter where in the Android.mk file this line is added? Can I just add it at the end of the file?

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DevilWithin

687

Author

March 08, 2013 09:51 PM

Im still finding it hard to believe this is working hehe, it all seems so tricky.. :)

Thanks to you too for the help given!!

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WitchLord

4,834

March 09, 2013 12:07 AM

I've checked in the change to the Android make file in revision 1588.

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

quarnster

266

March 09, 2013 06:23 AM

@quarnster: Thanks a lot. I would probably not have found that one, at least not anytime soon. Does it matter where in the Android.mk file this line is added? Can I just add it at the end of the file?

It needs to be between the two include directives.

WitchLord

4,834

March 09, 2013 10:47 PM

Thanks. I've updated the file accordingly.

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

AgentC

2,476

March 12, 2013 08:04 AM

I got hit by this bug as well (manifested as a crash when running scripts on Android) but it did not appear before updating the Android NDK to the latest, which suggests the compiler's handling of arm/thumb interoperation has changed.

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Premature destruction of object in Android

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Premature destruction of object in Android

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