RFR (S): JDK-8026154: [TESTBUG] runtime/CDSCompressedKPtrs/XShareAuto.java failed due to exception

Christian Tornqvist christian.tornqvist at oracle.com
Mon Mar 10 15:41:48 UTC 2014

Looks good! Thanks for fixing this.


-----Original Message-----
From: hotspot-runtime-dev-bounces at openjdk.java.net 
[mailto:hotspot-runtime-dev-bounces at openjdk.java.net] On Behalf Of Mikhailo 
Sent: Thursday, March 6, 2014 8:10 AM
To: hotspot-runtime-dev
Subject: RFR (S): JDK-8026154: [TESTBUG] 
runtime/CDSCompressedKPtrs/XShareAuto.java failed due to exception

     Please review this change that fixes several tests.
     The issues addressed by this change have similar root cause, hence I 
have consolidated them under the umbrella of JDK-8026154 and hope to submit 
them as one change set.

     In detail, these changes are introduced to cover situation where 
mapping of the shared (CDS) archive into memory fails. Such situation is a 
random occurance, and is most likely due
     to ASLR (Adress Space Layout Randomization). ASLR is a  security 
feature managed by OS that randomizes the address where shared libraries are 
loaded; if the shared library is mapped
     into the space intended for the CDS archive, the mapping of the archive 
will fail. With this change, these tests take such situation into account.

     JBS: https://bugs.openjdk.java.net/browse/JDK-8026154
     Webrev: http://cr.openjdk.java.net/~mseledtsov/8026154/webrev.00/
         Exercises these tests on all standard platforms via JPRT -> PASS
         Local testing with number of iterations, especially on Windows 
where ASLR
             seems to be more aggressive

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