review request for JDK-8010428: Special -agentpath checks needed with minimal VM to produce proper error message

[Carlos Lucasius]

Please review the following fix for JDK-8010428  (Special -agentpath 
checks needed with minimal VM to produce proper error message):

    http://cr.openjdk.java.net/~clucasius/8010428/webrev00/



Description (copied from 
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8010428):

    If you try to use -agentpath to load libhprof.so or libjdwp.so with
    the minimal VM, it fails with an unfriendly message that doesn't
    indicate the real problem (hprof and jdwp not supported with the
    minimal VM). For example:

    $ bin/java -minimal
    -agentpath:/export/home/aurora/jp/ejdk1.8.0/jre/lib/i386/libhprof.so
    HPROF ERROR: Unable to access JVMTI Version 1 (0x30010000), is your
    JDK a 5.0 or newer version? JNIEnv's GetEnv() returned -2
    [hprof_util.c:1706]

    The VM needs an explicit check for attempts to load libhprof.so or
    libjdwp.so with -agentpath, and fail immediately with the proper
    error message.


Thanks,

-Carlos



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