RFR: 8338383: Implement JEP 491: Synchronize Virtual Threads without Pinning [v3]

[Patricio Chilano Mateo]

On Tue, 22 Oct 2024 15:50:15 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> Patricio Chilano Mateo has updated the pull request incrementally with six additional commits since the last revision:
>> 
>>  - Fix comments in objectMonitor.hpp
>>  - Move frame::saved_thread_address() to platform dependent files
>>  - Fix typo in jvmtiExport.cpp
>>  - remove usage of frame::metadata_words in possibly_adjust_frame()
>>  - Fix comments in c2 locking paths
>>  - Revert and simplify changes to c1_Runtime1 on aarch64 and riscv
>
> src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp line 5357:
> 
>> 5355: 
>> 5356: void MacroAssembler::dec_held_monitor_count() {
>> 5357:   Address dst = Address(rthread, JavaThread::held_monitor_count_offset());
> 
> Suggestion:
> 
> // Clobbers: rscratch1 and rscratch2
> void MacroAssembler::dec_held_monitor_count() {
>   Address dst = Address(rthread, JavaThread::held_monitor_count_offset());

Added.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21565#discussion_r1813515113