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[Mercurial <1611598@xxxxxxxxxxxxxxxxxx>]

details: http://icedtea.classpath.org//hg/icedtea7?cmd=changeset;node=3f1ac6eef871
author: Andrew John Hughes <gnu_andrew@xxxxxxxxxxxxxx>
date: Fri Nov 11 05:51:16 2016 +0000

        PR3134: JamVM is broken due to 2 new native methods in
sun.misc.Unsafe (from S8158260)

        2016-08-10  Tiago Stuermer Daitx  <tdaitx@xxxxxxxxx>

		PR3134: JamVM is broken due to 2 new native
		methods in sun.misc.Unsafe (from S8158260)
		* Makefile.am:
		(ICEDTEA_PATCHES): Add JamVM patch for PR3134.
		* NEWS: Updated.
		* patches/jamvm/pr3134-unsafe_methods.patch:
		Add implementation of isBigEndian0 and unalignedAccess0.

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https://bugs.launchpad.net/bugs/1611598

Title:
  jamvm is broken due to missing native methods in sun.misc.Unsafe

Status in OpenJDK:
  In Progress
Status in openjdk-7 package in Ubuntu:
  Confirmed
Status in openjdk-7 source package in Precise:
  Fix Released
Status in openjdk-7 source package in Trusty:
  Fix Released

Bug description:
  [Issue]
  The fix of OpenJDK's bug 8158260 (http://icedtea.classpath.org/hg/release/icedtea7-forest-2.6/hotspot/rev/4f8cbd54a9c6) introduced 2 new native methods to the sun.misc.Unsafe class: isBigEndian0 and unalignedAccess0.

  This completely broke JamVM and as of now it is impossible to start a
  jamvm session.

  jtreg summary results for OpenJDK 7:
  hotspot   - Test results: passed: 5; failed: 309; error: 7
  langtools - Test results: passed: 374; failed: 1,593; error: 1

  An error output from a testcase:
  ----------System.err:(6/344)----------
  Error initialising VM (initialiseMainThread)
  Check the README for compatible class-libraries/versions
  Exception occurred while printing exception (java/lang/NullPointerException)...
  Original exception was java/lang/UnsatisfiedLinkError
  Error: Could not create the Java Virtual Machine.
  Error: A fatal exception has occurred. Program will exit.
  result: Failed. Unexpected exit from test [exit code: 1]

  Running java -jamvm -version fails the same way.

  [Fix]
  The simple fix is to add both methods to the natives.c file in the classlib/openjdk directory.

  I have tested this with IcedTea 2.6.7 and now jtreg passes:
  hotspot   - Test results: passed: 220; failed: 90; error: 11
  langtools - Test results: passed: 1,901; failed: 65; error: 2

  I have reported this upstream at https://sourceforge.net/p/jamvm/code
  /merge-requests/1/ and it is now waiting review.

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