java.lang.VerifyError und Android 2.3

Monkey Forums/Monkey Bug Reports/java.lang.VerifyError und Android 2.3

Volker

(Posted 2013) [#1]

This code crashes under Android 2.2 (Samsung Galaxy Tab) and under Android 2.3.3 in the emulator.
It does it while loading the TimelineFX library in LoadLibrary().
Works fine in Html5, XNA and Android 4.x.
I've played with the heap size settings of the virtual machine. The code works with heap size 32 or 64, but with 16 (standard) it crashes.
All files needed: http://skopia.de/BRLfiles.rar

E/AndroidRuntime(10461): FATAL EXCEPTION: GLThread 10

E/AndroidRuntime(10461): java.lang.VerifyError: com.monkeycoder.monkeygame.bb_loaders

E/AndroidRuntime(10461): at com.monkeycoder.monkeygame.c_TFXManager.p_LoadLibrary(MonkeyGame.java:5516)


Import mojo

Import timelinefx

' Under android 2.3 in Emulator with VM Heap: 64 works. 32: works. 16: crashes



Class MyApp Extends App

	Field tfxmanager:TFXManager
	Field smokeeffect:tlEffect
	Field effectamount:int
	
	Field renders:Int
	Field fps:int
	Field old_ms:int
	
	Method OnCreate()
		SetUpdateRate 30
		Self.tfxmanager = New TFXManager(640, 480, 30,, true)
		Self.tfxmanager.LoadLibrary("flares")
	End Method
	
	Method OnUpdate()
		Self.tfxmanager.Update()
		If TouchHit()

			Self.smokeeffect = tfxmanager.GetEffect("Imploding Flare")'		 MyEffects.GetEffect("thick smoke")		
	
			Local posx:Int = Rnd(100, 200)
			Local posy:Int = Rnd(100, 200)
			Self.smokeeffect.SetPosition(posx, posy)
		EndIf
	End
	
	Method OnRender()

		Cls
		DrawText(fps, 10, 30)
		DrawText("Hello world", 10, 10)
		Self.tfxmanager.Render()
		
	End
	
End

Function Main()

	New MyApp
	
End




Class TFXManager
	'
	Private
	'
	Field effectlist:ArrayList<tlEffect>=new ArrayList<tlEffect>
	
	Field particlemanager:tlParticleManager
	Field effectlibrary:tlEffectsLibrary
	Field alleffectnames:StringList = New StringList
	
	Field timeNeededRendering:int
	
	Method New(width:Int, height:int, frequence:Int = 30, particlelimit:Int = 5000, disablesetcolor:Bool = False)
		particlemanager = CreateParticleManager(particlelimit)

		
		'Set the number of times per second that you want the particles to 
		'be updated. Best to set this to the UpdateRate
		SetUpdateFrequency(frequence)
		
		'Let the Particle manager know the screen size
		particlemanager.SetScreenSize(width, height)
		
		'Set the origin so that we can use mouse coords to place effects on screen
		particlemanager.SetOrigin(width / 2, height / 2)
		if disablesetcolor=True Then particlemanager.DisableSetColor() ' for faster drawing under html5, set only to true for development.
	End Method
	
	Public
	
	Method LoadLibrary:Void(filename:String)
		Self.effectlibrary = LoadEffects(filename)
	End Method	
	Method PreloadLibrary:Void()
		' to have all images loaded already, already done in LoadEffects()?
		
	End Method	
	Method GetEffect:tlEffect(name:string, amount:Float = 1, scale:Float = 1)
		If Self.effectlibrary = Null
			Error("TFX-Manager: No libray found, loaded one?")
		EndIf
		Local tempeffect:tlEffect = effectlibrary.GetEffect(name)
		If tempeffect = Null Then Error("TFX-Manager: Effect not found")
		Local copyoffeffect:tlEffect = CopyEffect(tempeffect, Self.particlemanager)
		Self.SetAmount(copyoffeffect, amount)
		Self.SetScale(copyoffeffect, scale)
		'
		Self.particlemanager.AddEffect(copyoffeffect)
		Self.effectlist.AddLast(copyoffeffect)
		'
		Return copyoffeffect
	End Method	
	Method DestroyEffect:Void(effect:tlEffect, softkill:Bool = False)
		If effectlist.Contains(effect) = False ' do not destroy effects twice, if its done somewhere else
			Return 
		EndIf
		particlemanager.RemoveEffect(effect)
		effectlist.Remove(effect)
		effect.Destroy()
	End Method
	Method SetScale(effect:tlEffect, scale:Float)
		'scales how big the complete effect is drawn
		effect.SetZ(scale)
	End Method
	Method SetParticleScaleXY:Void(effect:tlEffect, scaleX:Float, scaleY:Float)
		' scales only size of particles
		effect.SetSizeX(scaleX)
		effect.SetSizeY(scaleY)
	End Method
	Method SetAmount(effect:tlEffect, amount:Float)
		' sets how many particles spawn. Lower values have great impact on speed
		effect.SetAmount(amount)	
	End Method
	Method Update:Void()
		Self.particlemanager.Update()
	End Method	
	Method GetTimeNeeded:Int()
		' returns time needed for last rendering
		Return Self.timeNeededRendering
	End Method
	Method RemoveAllEffects:Void()
		For Local e:tlEffect = EachIn Self.effectlist		
			Self.particlemanager.RemoveEffect(e)
			e.Destroy()
		Next
		Self.effectlist.Clear()
	End Method
	
	Method Render:Void()
		Local starttime:Int = Millisecs()
		Self.particlemanager.DrawParticles()
		Self.timeNeededRendering = Millisecs() -starttime
		SetColor(255, 255, 255) 'remove later if its done in tfx
		SetAlpha(1)
		SetBlend(AlphaBlend)
	End Method
End Class

marksibly

(Posted 2013) [#2]

It break here too on 2.3.3 emulator, but I get an OutOfMemoryError instead.

I've tracked it down to the loading of the XML file (which doesn't seem that big to me) but I doubt there's much I can do - it fails on an allocation of 512K bytes, even though there's apparently 2M free. Not sure if this is an old android bug or what.

Perhaps you could streamline the XML? But even if you did and got it working, you've still 'only' got 2M to play with after that so it's probably not much help...

You could also try reading the XML 'bit by bit' using a filestream instead of using LoadString, but again I think the low memory would catch up with you sooner or later anyway.

AdamRedwoods

(Posted 2013) [#3]

512K is a lot for heap size. those heap limits will get you every time.

ways to get around:
1. if you really need the bigger heap, i believe Android 2.3 allows a "largeHeap" request in the manifest.

2. if you move data load to the DataBuffer (which uses ByteBuffer), you can see if ByteBuffer.allocate() will allocate off the heap (unsure on this one).
http://stackoverflow.com/questions/5670862/bytebuffer-allocate-vs-bytebuffer-allocatedirect

marksibly

(Posted 2013) [#4]

[edit]
Ignore...
[/edit]

AdamRedwoods

(Posted 2013) [#5]

oh you're right heap size is around 16-24mb, not sure what i was thinking.
plus, that heap will grow and freeMemory() doesn't show that limit, i think maxMemory() does.

unless there's some magic manifest setting to fix things.

heh, NDK

marksibly

(Posted 2013) [#6]

Yeah, my freeMemory code was flawed - this seems to give more believable results:

	public static int FreeMemory(){
		System.gc();
		return (int)( Runtime.getRuntime().maxMemory()-Runtime.getRuntime().totalMemory()+Runtime.getRuntime().freeMemory() );
	}

But it indicates that the 512k byte allocation fails when there's 6M free, which could mean severe fragmentation? Or (IMO more likely) there's a bug somewhere in older Android...

One thing that fixes it is reducing 'max particles' - 1000 works here, while some higher values cause an OutOfMemory in other parts of the app. Particle is a pretty heavyweight class so this will have quite an effect.