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From "Jin Yang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-6659) [classlib][luni]Launcher causing JVM to silently ignore unrecognized options
Date Sun, 26 Sep 2010 12:26:33 GMT
[classlib][luni]Launcher causing JVM to silently ignore unrecognized options
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                 Key: HARMONY-6659
                 URL: https://issues.apache.org/jira/browse/HARMONY-6659
             Project: Harmony
          Issue Type: Bug
          Components: Classlib
            Reporter: Jin Yang


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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