[Bug 255901] java/openjdk12: Fix possible segfaults with clang 12

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255901

--- Comment #2 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/ports/commit/?id=d6f8398fa2774d0e8eb6ab29b40b6ef0b16ba133

commit d6f8398fa2774d0e8eb6ab29b40b6ef0b16ba133
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2021-05-15 14:45:59 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2021-05-29 14:08:18 +0000

    java/openjdk12: fix build with clang 12

    During an exp-run for llvm 12 (see bug 255570), it turned out that
    java/openjdk11 does not build with clang 12.0.0:

    Creating support/demos/image/jfc/J2Ddemo/J2Ddemo.jar
    /usr/local/bin/bash: line 5: 49140 Abort trap              (core dumped)
/wrkdirs/usr/ports/java/openjdk12/work/openjdk-jdk12u-jdk-12.0.2-10-4/build/bsd-x86_64-server-release/support/interim-image/bin/java
-XX:DumpLoadedClassList=/wrkdirs/usr/ports/java/openjdk12/work/openjdk-jdk12u-jdk-12.0.2-10-4/build/bsd-x86_64-server-release/support/link_opt/classlist.raw
-Djava.lang.invoke.MethodHandle.TRACE_RESOLVE=true -cp
/wrkdirs/usr/ports/java/openjdk12/work/openjdk-jdk12u-jdk-12.0.2-10-4/build/bsd-x86_64-server-release/support/classlist.jar
build.tools.classlist.HelloClasslist > /dev/null 2>&1 >
/wrkdirs/usr/ports/java/openjdk12/work/openjdk-jdk12u-jdk-12.0.2-10-4/build/bsd-x86_64-server-release/support/link_opt/default_jli_trace.txt
    gmake[4]: *** [GenerateLinkOptData.gmk:66:
/wrkdirs/usr/ports/java/openjdk12/work/openjdk-jdk12u-jdk-12.0.2-10-4/build/bsd-x86_64-server-release/support/link_opt/classlist]
Error 134

    This is due to missing backports of upstream commits:

    commit c484d8904285652246c3af212a4211b9a8955149
    Author: Thomas Stuefe <stuefe@openjdk.org>
    Date:   Tue Mar 16 05:49:01 2021 +0000

        8263557: Possible NULL dereference in Arena::destruct_contents()

        Reviewed-by: kbarrett, coleenp

    commit 34ae46e2bca691f989d4d84129baf545ff8a7469
    Author: Andrew Haley <aph@openjdk.org>
    Date:   Thu Mar 19 14:53:57 2020 +0000

        8241296: Segfault in JNIHandleBlock::oops_do()

        Reviewed-by: stefank

    Approved by:    maintainer timeout (2 weeks)
    PR:             255901
    MFH:            2021Q2

 .../openjdk12/files/patch-commit-34ae46e2bca (new) | 23 ++++++++++++++++++++++
 .../openjdk12/files/patch-commit-c484d890428 (new) | 23 ++++++++++++++++++++++
 2 files changed, 46 insertions(+)

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