RFR: Fix Windows aarch64 builds [v2]

[Aleksey Shipilev]

On Thu, 30 Sep 2021 10:50:41 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Current GHA point the problem with Windows aarch64 builds:
>>   https://github.com/shipilev/loom/runs/3721167733
>>  
>> It passes now:
>>   https://github.com/shipilev/loom/runs/3722819426
>> 
>> Additional testing:
>>  - [x] Windows aarch64 GHA builds fine
>>  - [x] Linux aarch64 `tier1_loom` still passes
>
> Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
> 
>  - Merge branch 'fibers' into windows-aarch64-builds
>  - More changes
>  - Fixing GHA failures in Windows AArch64

There are still weird failures on macos-aarch64, like:


2021-09-30T11:41:57.9432190Z /Users/runner/work/loom/loom/jdk/src/hotspot/share/oops/accessBackend.hpp:1203:5: warning: unused typedef 'STATIC_ASSERT_DUMMY_TYPE_1205' [-Wunused-local-typedef]
2021-09-30T11:41:57.9433590Z     STATIC_ASSERT((HasDecoratoUndefined symbols for architecture x86_64:
2021-09-30T11:41:57.9434590Z   "JvmtiThreadState::set_thread(JavaThread*)", referenced from:
2021-09-30T11:41:57.9435460Z       JavaThread::rebind_to_jvmti_thread_state_of(oop) in thread.o
2021-09-30T11:41:57.9436330Z   "JvmtiVTMTDisabler::start_VTMT(_jobject*, int)", referenced from:
2021-09-30T11:41:57.9437180Z       _JVM_VirtualThreadMountBegin in jvm.o
2021-09-30T11:41:57.9438020Z       _JVM_VirtualThreadUnmountBegin in jvm.o
2021-09-30T11:41:57.9438870Z   "JvmtiVTMTDisabler::_VTMT_count", referenced from:
2021-09-30T11:41:57.9439640Z       JavaThread::set_is_VTMT_disabler(bool) in thread.o
2021-09-30T11:41:57.9440470Z   "JvmtiVTMTDisabler::finish_VTMT(_jobject*, int)", referenced from:
2021-09-30T11:41:57.9441300Z       _JVM_VirtualThreadMountEnd in jvm.o
2021-09-30T11:41:57.9442080Z       _JVM_VirtualThreadUnmountEnd in jvm.o
2021-09-30T11:41:57.9442930Z   "JvmtiVTMTDisabler::_VTMT_disable_count", referenced from:
2021-09-30T11:41:57.9443720Z       JavaThread::set_is_in_VTMT(bool) in thread.o
2021-09-30T11:41:57.9444370Z       JavaThread::java_suspend() in thread.o
2021-09-30T11:41:57.9445220Z   "JvmtiEventController::thread_started(JavaThread*)", referenced from:
2021-09-30T11:41:57.9446160Z       JavaThread::rebind_to_jvmti_thread_state_of(oop) in thread.o
2021-09-30T11:41:57.9446890Z ld: symbol(s) not found for architecture x86_64
2021-09-30T11:41:57.9448190Z clang: error: linker command failed with exit code 1 (use -v to see invocation)


But I believe they are unrelated to this patch. windows-aarch64 and linux-aarch64 seem to build fine in GHA. I propose we integrate this PR, and deal with the rest later.

-------------

PR: https://git.openjdk.java.net/loom/pull/70