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From "Regis Xu (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (HARMONY-6659) [classlib][luni]Launcher causing JVM to silently ignore unrecognized options
Date Mon, 27 Sep 2010 09:18:34 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-6659?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Regis Xu reassigned HARMONY-6659:
---------------------------------

    Assignee: Regis Xu

> [classlib][luni]Launcher causing JVM to silently ignore unrecognized options
> ----------------------------------------------------------------------------
>
>                 Key: HARMONY-6659
>                 URL: https://issues.apache.org/jira/browse/HARMONY-6659
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>            Reporter: Jin Yang
>            Assignee: Regis Xu
>         Attachments: HARMONY-6659.diff
>
>
> Harmony launcher instructs the JVM to discard any unrecognized argument silently, this
hides incorrectly formed command lines and can lead to tests passing (e.g. those that contain
-Xcompressedrefs) when they should fail.  To see the problem simply add an unrecognized VM
option to the command line, e.g.
> 	Command:	'.\java -XthisShouldBarf -version'
> `	Expected Output:
> 		Unrecognized option: -XthisShouldBarf
> 		Could not create the Java virtual machine.
> 	Actual Output:
> 		Apache Harmony Launcher : (c) Copyright 1991, 2010 The Apache Software Foundation or
its licensors,as applicable.
> 		java version "1.6.0"
> 		Harmony Virtual Machine Element (20100920_64951)
> 		IBM J9 VM (2.6)
> 		IBM J9 2.6 Windows XP x86-32  (JIT enabled, AOT enabled)
> 		J9VM - R26_head_20100917_1044_B64808
> 		JIT  - dev_20100903_16914
> 		GC   - R26_head_20100916_1755_B64769
> 		J9CL - 20100920_64951
> 		Harmony - Unknow
> It can be fixed by changing the argument #6 from JNI_TRUE to JNI_FALSE  in lancher's
calling
>  invocation
>       (PORTLIB, argc, argv, handle, JNI_VERSION_1_4, JNI_TRUE, mainClass,
>        classArg, propertiesFileName, isStandaloneJar, vmdllsubdir, versionFlag);
> This argument is to inidicate JVM whether should ignore any unrecognized option.
> This change will only affect IBM JVM because it's sensitive to this argument. 
> While DRLVM will not be affected because it doesn't use this option(passing JNI_TRUE
or JNI_FALSE will have same effect, DRLVM will always fail on any unrecognized option)

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