[jboss-jira] [JBoss JIRA] (JASSIST-152) instrumentation fails when building stackmap for local var of array type : bad array type for AALOAD: null

[Yanic Inghelbrecht (JIRA)]

    [ https://issues.jboss.org/browse/JASSIST-152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12665337#comment-12665337 ] 

Yanic Inghelbrecht commented on JASSIST-152:
--------------------------------------------

For your convenience, here's the code for the method for which the instrumentation fails :

	private static Map<String, Column[]> buildColumnOverride(XAnnotatedElement element, String path) {
		Map<String, Column[]> columnOverride = new HashMap<String, Column[]>();
		if ( element == null ) return columnOverride;
		AttributeOverride singleOverride = element.getAnnotation( AttributeOverride.class );
		AttributeOverrides multipleOverrides = element.getAnnotation( AttributeOverrides.class );
		AttributeOverride[] overrides;
		if ( singleOverride != null ) {
			overrides = new AttributeOverride[] { singleOverride };
		}
		else if ( multipleOverrides != null ) {
			overrides = multipleOverrides.value();
		}
		else {
			overrides = null;
		}

		//fill overridden columns
		if ( overrides != null ) {
			for (AttributeOverride depAttr : overrides) {
				columnOverride.put(
						StringHelper.qualify( path, depAttr.name() ),
						new Column[] { depAttr.column() }
				);
			}
		}
		return columnOverride;
	}

(LGPL licensed, taken from the hibernate 4.0.1 final distribution)
                
> instrumentation fails when building stackmap for local var of array type : bad array type for AALOAD: null
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: JASSIST-152
>                 URL: https://issues.jboss.org/browse/JASSIST-152
>             Project: Javassist
>          Issue Type: Bug
>    Affects Versions: 3.15.0-GA
>         Environment: Any
>            Reporter: Yanic Inghelbrecht
>            Assignee: Shigeru Chiba
>         Attachments: demonstration.zip
>
>
> When trying to instrument the attached org.hibernate.cfg.AbstractPropertyHolder (copied from the hibernate 4.0.1 final distribution), instrumentation fails with the following exception :
> java.lang.RuntimeException: fatal error: 
> 	at javassist.bytecode.stackmap.TypeData$TypeName.getTypeData(TypeData.java:177)
> 	at javassist.bytecode.stackmap.MapMaker.fillStackMap(MapMaker.java:410)
> 	at javassist.bytecode.stackmap.MapMaker.toStackMapBody(MapMaker.java:393)
> 	at javassist.bytecode.stackmap.MapMaker.toStackMap(MapMaker.java:323)
> 	at javassist.bytecode.stackmap.MapMaker.make(MapMaker.java:98)
> 	at javassist.bytecode.MethodInfo.rebuildStackMap(MethodInfo.java:417)
> 	at javassist.bytecode.MethodInfo.rebuildStackMapIf6(MethodInfo.java:399)
> 	at javassist.expr.ExprEditor.doit(ExprEditor.java:113)
> 	at javassist.CtBehavior.instrument(CtBehavior.java:672)
> 	at test_abstractpropertyholder.SimpleTranslator.modify(SimpleTranslator.java:25)
> 	at test_abstractpropertyholder.SimpleTranslator.onLoad(SimpleTranslator.java:19)
> 	at test_abstractpropertyholder.JavassistInstrumenter.getInstrumentedClass(JavassistInstrumenter.java:21)
> 	at test_abstractpropertyholder.Main.main(Main.java:32)transforming org.hibernate.cfg.AbstractPropertyHolder
> Caused by: javassist.bytecode.BadBytecode: bad array type for AALOAD: null
> 	at javassist.bytecode.stackmap.TypeData$ArrayElement.getName(TypeData.java:422)
> 	at javassist.bytecode.stackmap.TypeData$TypeName.getExpected(TypeData.java:292)
> 	at javassist.bytecode.stackmap.TypeData$TypeName.getTypeData(TypeData.java:175)
> 	... 12 more

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