[Soot-list] Exceptions in IFDS Analysis

[Henddher Pedroza]

I was getting strange exceptions also, and after letting it run pass the exceptions, it ended up with OOE. 
I bumped up the heap size to 4000M and it seems to be ok now.

-Xmx4000m

I am actually running IDE Main + IFDSUninitializedVariables on a dummy stand-alone java app with 5 classes (~5K uncompressed)

But, I don't know :(

On Apr 5, 2013, at 3:35 PM, Marc-André Laverdière-Papineau <marc-andre.laverdiere-papineau at polymtl.ca> wrote:

> Hello,
> 
> I have been getting this problem only recently, and I am not sure what I 
> am doing wrong.
> 
> I am getting exceptions like these:
> 
> Exception in thread "pool-2-thread-1" java.lang.NullPointerException
> 	at 
> com.google.common.base.Preconditions.checkNotNull(Preconditions.java:191)
> 	at com.google.common.cache.LocalCache.get(LocalCache.java:3989)
> 	at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3994)
> 	at 
> com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4878)
> 	at 
> com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4884)
> 	at 
> soot.jimple.toolkits.ide.icfg.JimpleBasedInterproceduralCFG.getOrCreateUnitGraph(JimpleBasedInterproceduralCFG.java:174)
> 	at 
> soot.jimple.toolkits.ide.icfg.JimpleBasedInterproceduralCFG.isExitStmt(JimpleBasedInterproceduralCFG.java:199)
> 
> and
> 
> Exception in thread "main" java.lang.NullPointerException
> 	at 
> soot.jimple.toolkits.ide.icfg.JimpleBasedInterproceduralCFG.getMethodOf(JimpleBasedInterproceduralCFG.java:163)
> 	at 
> soot.jimple.toolkits.ide.icfg.JimpleBasedInterproceduralCFG.getMethodOf(JimpleBasedInterproceduralCFG.java:65)
> 	at heros.solver.IDESolver.setVal(IDESolver.java:576)
> 
> Digging a bit, I am seeing that unitToOwner returns null in this chunk 
> of code, when u is an IdentityStmt.
> 
> 	@Override
> 	public boolean isExitStmt(Unit u) {
> 		Body body = unitToOwner.get(u);
> 		DirectedGraph<Unit> unitGraph = getOrCreateUnitGraph(body);
> 		return unitGraph.getTails().contains(u);
> 	}
> 
> Even when I breakpoint and look down in the trace, I am unable to 
> determine where it is coming from, or why is it that a given method is 
> analyzed or not. You can say that troubleshooting is hard :(
> 
> Has anybody else ever dealt with this? How did you fix it?
> 
> P.S. I am running with some exclusions and -no-bodies-for-excluded
> P.P.S I tried feeding all the units in the application classes in 
> unitToOwner and I'm still hitting this problem.
> 
> Regards,
> 
> -- 
> Marc-André Laverdière-Papineau
> Doctorant - PhD Candidate
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