[11u] RFR: 8248411: [aarch64] Insufficient error handling when CodeBuffer is exhausted

[Christoph Göttschkes]

Hi,

please review this backport of JDK-8248411 from 15u to 11u.

Bug: https://bugs.openjdk.java.net/browse/JDK-8248411
Original commit: https://github.com/openjdk/jdk/commit/f279ddfa
15u backport webrev: 
https://cr.openjdk.java.net/~phedlin/tr8248411.15u/webrev/index.html

Webrev: https://cr.openjdk.java.net/~cgo/8248411/backport-11u.00/

we are seeing intermittent test failure in jdk11u on aarch64 for the 
hotspot tier1 jtreg tests
"compiler/codecache/TestStressCodeBuffers.java". I backported 
JDK-8248411, which resolves the issues.
I executed the test case several times. Without the patch, 10 of 25 runs 
failed. With the patch applied, 0 of 25 runs failed.

I chose the 15u backport as a basis for this 11u backport. Everything 
except the changes to "src/hotspot/share/opto/output.cpp" applies 
cleanly. The changes in output.cpp are only the addition of one assert 
call and some formatting.

Tests executed:
  * Hotspot tier1 on linux aarch64
  * Tier1 on linux x86_64

Thanks,
Christoph