[8u-dev] Request for Approval: Bulk backport of 8180565, 8180617, 8180511, 8180576, 8180575 and 8180813

[Tobias Hartmann]

Hi,

please approve the backports of the following fixes to JDK 8u:

8180565: Null pointer dereferences of ConstMethod::method()
http://cr.openjdk.java.net/~thartmann/8180565/webrev.00/
http://hg.openjdk.java.net/jdk9/dev/hotspot/rev/8f941bab493f
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2017-May/026261.html

8180617: Null pointer dereference in InitializeNode::complete_stores
http://cr.openjdk.java.net/~thartmann/8180617/webrev.00/
http://hg.openjdk.java.net/jdk9/dev/hotspot/rev/0b218e675429
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2017-May/026275.html

8180511: Null pointer dereference in Matcher::ReduceInst()
http://cr.openjdk.java.net/~thartmann/8180511/webrev.00/
http://hg.openjdk.java.net/jdk9/dev/hotspot/rev/1f917785fbe7
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2017-May/026258.html

8180576: Null pointer dereference in Matcher::xform()
http://cr.openjdk.java.net/~thartmann/8180576/webrev.00/
http://hg.openjdk.java.net/jdk9/dev/hotspot/rev/286c8e80795b
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2017-May/026259.html

8180575: Null pointer dereference in LoadNode::Identity()
http://cr.openjdk.java.net/~thartmann/8180575/webrev.00/
http://hg.openjdk.java.net/jdk9/dev/hotspot/rev/31c842513336
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2017-May/026260.html

8180813: Null pointer dereference of CodeCache::find_blob() result
http://cr.openjdk.java.net/~thartmann/8180813/webrev.00/
http://hg.openjdk.java.net/jdk9/dev/hotspot/rev/63ac6d565c21
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2017-May/026307.html

The backport of 8180813 does not apply cleanly because "is_compiled" is called "is_nmethod" and "as_compiled_method_or_null" is called "as_nmethod_or_null" in JDK 8u.

Here's the new webrev for 8180813:
http://cr.openjdk.java.net/~thartmann/8180813_8u/webrev.00/
The review is in progress:
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2017-May/026371.html

All other backports apply cleanly. Tested with JPRT.

Thanks,
Tobias