Bug ID: JDK-8253167 ARM32 builds fail after JDK-8247910

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JDK 11	JDK 16
11.0.12Fixed	16 b17Fixed

Oh, this is a fun failure:

* For target hotspot_variant-server_libjvm_objs_ageTable.o:
In file included from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/utilities/globalDefinitions.hpp:514:0,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/memory/allocation.hpp:29,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/metaprogramming/primitiveConversions.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/oops/markWord.hpp:29,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shared/ageTable.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shared/ageTable.inline.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shared/ageTable.cpp:27:
/home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/utilities/align.hpp: In function 'constexpr T alignment_mask(T)':
/home/buildbot/worker/build-jdkX-linux/build/src/hotspot/cpu/arm/globalDefinitions_arm.hpp:61:20: error: 'asm' in 'constexpr' function
 #define BREAKPOINT __asm__ volatile ("bkpt")
                    ^
/home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/utilities/debug.hpp:59:5: note: in expansion of macro 'BREAKPOINT'
     BREAKPOINT;                                                                \
     ^~~~~~~~~~
/home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/utilities/debug.hpp:65:24: note: in expansion of macro 'vmassert'
   ... (rest of output omitted)

Fix Request (11u): Patch doesn't apply cleanly, because of a different copyright year. This is not technically an issue for 11u, but since the fix for JDK-8213483 (which is relevant for 11u and should be fixed) also fixes this issue, I request to fix this one as well. Webrev: https://cr.openjdk.java.net/~cgo/8213483/webrev.11u.01/ Review: https://mail.openjdk.java.net/pipermail/jdk-updates-dev/2021-April/005908.html
22-04-2021
Changeset: bca9e55b Author: Kim Barrett <kbarrett@openjdk.org> Date: 2020-09-21 00:31:26 +0000 URL: https://git.openjdk.java.net/jdk/commit/bca9e55b
21-09-2020
constexpr functions are not permitted to contain asm statements (until C++20), even if not executed by a constexpr invocation. This means assert (for example) can't be used in a constexpr function on arm32, because of the implementation of the BREAKPOINT macro as an asm statement. I expect win32 to have the same problem, but don't currently have a way to attempt a build to demonstrate that. I think the way to deal with both is to remove the asm-based implementations of BREAKPOINT and use the default that calls ::breakpoint(), as all the other platform variants do.
18-09-2020
ILW = HML = P2
15-09-2020

Duplicate :	JDK-8253417 - Windows 32bit fastdebug compile error padded.hpp
Relates :	JDK-8247910 - Improve alignment and power-of-2 utilities using C++14
Relates :	JDK-8213483 - ARM32: runtime/ErrorHandling/ShowRegistersOnAssertTest.java jtreg test fail