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Bug 256541

Summary:	[newcodemodel] java.lang.NullPointerException
Product:	cnd	Reporter:	Alexander Simon <alexvsimon>
Component:	Code Model	Assignee:	Vladimir Kvashin <vkvashin>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	P3
Version:	8.1
Hardware:	PC
OS:	Solaris
Issue Type:	DEFECT	Exception Reporter:

Description Alexander Simon 2015-11-12 10:47:01 UTC

NPE in log:

INFO [dlight.libs.common.logger]
java.lang.NullPointerException
	at org.clang.lex.impl.EvaluateValueHelper.$destroy(EvaluateValueHelper.java:46)
	at org.clang.lex.Preprocessor.$releasePPValue(Preprocessor.java:9651)
	at org.clang.lex.Preprocessor.EvaluateDirectiveExpression(Preprocessor.java:5808)
	at org.clang.lex.Preprocessor.HandleIfDirective(Preprocessor.java:8633)
	at org.clang.lex.Preprocessor.HandleDirective(Preprocessor.java:4262)
	at org.clang.lex.Lexer.LexTokenInternal(Lexer.java:2800)
	at org.clang.lex.Lexer.Lex(Lexer.java:378)
	at org.clang.lex.Preprocessor.Lex(Preprocessor.java:2362)
	at org.clang.lex.Preprocessor.LexUnexpandedToken(Preprocessor.java:2533)
	at org.clang.lex.Preprocessor.ReadFunctionLikeMacroArgs(Preprocessor.java:6313)
	at org.clang.lex.Preprocessor.ReadFunctionLikeMacroArgs(Preprocessor.java:6270)
	at org.clang.lex.Preprocessor.HandleMacroExpandedIdentifier(Preprocessor.java:5973)
	at org.clang.lex.Preprocessor.HandleIdentifier(Preprocessor.java:3812)
	at org.clang.lex.Lexer.LexIdentifier(Lexer.java:3513)
	at org.clang.lex.Lexer.LexTokenInternal(Lexer.java:2198)
	at org.clang.lex.Lexer.Lex(Lexer.java:378)
	at org.clang.lex.Preprocessor.Lex(Preprocessor.java:2362)
	at org.clang.tools.services.impl.PreprocessorSupport.ConsumePreprocessedInput(PreprocessorSupport.java:404)
	at org.clang.tools.services.impl.PreprocessorSupport.dumpPreprocessedEntry(PreprocessorSupport.java:292)
	at org.clang.tools.services.impl.PreprocessorSupport.preprocessEntries(PreprocessorSupport.java:232)
	at org.clang.tools.services.impl.PreprocessorSupport.preprocess(PreprocessorSupport.java:175)
	at org.clang.tools.services.ClankPreprocessorServices.preprocess(ClankPreprocessorServices.java:67)
	at org.netbeans.modules.cnd.apt.impl.support.clank.ClankDriverImpl.preprocessImpl(ClankDriverImpl.java:158)
	at org.netbeans.modules.cnd.apt.support.ClankDriver.preprocess(ClankDriver.java:120)
	at org.netbeans.modules.cnd.modelimpl.parser.clank.ClankTokenStreamProducer.preprocessWithHandler(ClankTokenStreamProducer.java:297)
	at org.netbeans.modules.cnd.modelimpl.parser.clank.ClankTokenStreamProducer.getPreprocessorOutputForInterestedFile(ClankTokenStreamProducer.java:273)
	at org.netbeans.modules.cnd.modelimpl.parser.clank.ClankTokenStreamProducer.preprocessAndGetFileTokenStream(ClankTokenStreamProducer.java:231)
	at org.netbeans.modules.cnd.modelimpl.parser.clank.ClankTokenStreamProducer.getTokenStreamForParsing(ClankTokenStreamProducer.java:196)
	at org.netbeans.modules.cnd.modelimpl.csm.core.FileImpl.doParse(FileImpl.java:1519)
	at org.netbeans.modules.cnd.modelimpl.csm.core.FileImpl._parse(FileImpl.java:1150)
	at org.netbeans.modules.cnd.modelimpl.csm.core.FileImpl.ensureParsedImpl(FileImpl.java:726)
	at org.netbeans.modules.cnd.modelimpl.csm.core.FileImpl.ensureParsed(FileImpl.java:641)
[catch] at org.netbeans.modules.cnd.modelimpl.csm.core.ParserThread._run(ParserThread.java:148)
	at org.netbeans.modules.cnd.modelimpl.csm.core.ParserThread.run(ParserThread.java:74)
	at org.netbeans.modules.cnd.modelimpl.csm.core.ParserThreadManager$Wrapper.run(ParserThreadManager.java:92)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
	at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
	at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)

Comment 1 Alexander Simon 2015-11-12 10:59:04 UTC

Source code is gcc trunk:
https://codeload.github.com/gcc-mirror/gcc/zip/master
Was unconfigured project.

Comment 2 Vladimir Kvashin 2015-12-18 17:21:28 UTC

I parsed unconfigured gcc-master on Ubuntu Linux and on Solaris, with GNU and Studio 12.4 tool chains (on both OS) and this exception never repeated.

Code analysis shows that the only reason for this NPE to happen is possible another exception in Preprocessor.EvaluateDirectiveExpression before $getPPValue(BitWidth) is called.

(That's because $getPPValue(BitWidth) never returns null, as null can never get into EvaluateValueHelper.$PPValues). 

And that's how it was on Nov 12 when the bug was filed.

So the remedy is just to add "if (ResVal != null) { ..."

Sputnik
 bddd002445b7

Comment 3 ilia 2016-01-28 14:27:57 UTC

There is no change for this bug in cnd-main. Seems it was filtered out because binaries-list file was overridden