I am running our automated tests on macOS 12 - of which we have a grand total of ONE x64 system available to run headless tests.
Specifically I've been trying to run all tier1->tier3 tests and it looks to me as if there is one hotspot issue - reported by two tests on both production and debug
builds although the production build case doesn't crash it still fails

The tests are

gtest/GTestWrapper.java
and
gtest/NMTGtests.java#nmt-detail

and the specific subtest in ALL of the 4 failures I've seen is for this

os.dll_address_to_function_and_library_name_vm


I see this test was previously problem listed on macOS and fixed earlier this year.
https://bugs.openjdk.java.net/browse/JDK-8259569 but I don't know how related this is to that .

The links and results are here :-

MACH5 JOB #1
===========


tests : open/test/hotspot/jtreg/:tier1_common


production :

gtest/GTestWrapper.java

[ RUN ] os.dll_address_to_function_and_library_name_vm
open/test/hotspot/gtest/runtime/test_os.cpp:726: Failure
Value of: os::print_function_and_library_name(&st, addr)
  Actual: true
Expected: false
[ FAILED ] os.dll_address_to_function_and_library_name_vm (13 ms)
[ RUN ] os.iso8601_time_vm
====

debug :
gtest/GTestWrapper.java

 RUN ] os.dll_address_to_function_and_library_name_vm
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/decoder_machO.hpp:43
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (//workspace/open/src/hotspot/os/bsd/decoder_machO.hpp:43), pid=41911, tid=259
# Error: ShouldNotReachHere()
#
# JRE version: Java(TM) SE Runtime Environment (18.0) (fastdebug build 18-internal+0-2021-09-17-1847254.philip.race.jdkmac.git)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 18-internal+0-2021-09-17-1847254.philip.race.jdkmac.git, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, bsd-amd64)
# Core dump will be written. Default location: core.41911
#
# An error report file with more information is saved as:
# /testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_common/scratch/2/hs_err_pid41911.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
...
...
...

==============

gtest/NMTGtests.java#nmt-detail

[ RUN ] os.dll_address_to_function_and_library_name_vm
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/decoder_machO.hpp:43
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/workspace/open/src/hotspot/os/bsd/decoder_machO.hpp:43), pid=41918, tid=259
# Error: ShouldNotReachHere()
#
# JRE version: Java(TM) SE Runtime Environment (18.0) (fastdebug build 18-internal+0-2021-09-17-1847254.philip.race.jdkmac.git)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 18-internal+0-2021-09-17-1847254.philip.race.jdkmac.git, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, bsd-amd64)
# Core dump will be written. Default location: core.41918
#
# An error report file with more information is saved as:
# /testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_common/scratch/0/hs_err_pid41918.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
assert failed: Error: ShouldNotReachHere()assert failed: assert(pc != __null) failed: no pc?
[2021-09-18T02:11:49.308259Z] Waiting for completion for process 41918
[2021-09-18T02:11:49.308586Z] Waiting for completion finished for process 41918

=========


MACH 5 JOB #2
=============


test : gtest/NMTGtests.java#nmt-detail

[ RUN ] os.dll_address_to_function_and_library_name_vm
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/decoder_machO.hpp:43
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/workspace/open/src/hotspot/os/bsd/decoder_machO.hpp:43), pid=14605, tid=259
# Error: ShouldNotReachHere()
#
# JRE version: Java(TM) SE Runtime Environment (18.0) (fastdebug build 18-internal+0-2021-09-17-1827261.philip.race.jdkmac.git)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 18-internal+0-2021-09-17-1827261.philip.race.jdkmac.git, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, bsd-amd64)
# Core dump will be written. Default location: core.14605
#
# An error report file with more information is saved as:
# //testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_common/scratch/0/hs_err_pid14605.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
assert failed: Error: ShouldNotReachHere()assert failed: assert(pc != __null) failed: no pc?
[2021-09-17T23:39:44.503687Z] Waiting for completion for process 14605
[2021-09-17T23:39:44.504040Z] Waiting for completion finished for process 14605