I am still in process of debugging but creating this issue, s390x change done in JDK-8361376 are either incomplete or wrong.

* For target buildtools_create_symbols_javac__the.COMPILE_CREATE_SYMBOLS_batch:
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGILL (0x4) at pc=0x000003ff94e149aa, pid=335189, tid=335669
#
# JRE version: OpenJDK Runtime Environment (26.0) (fastdebug build 26-internal-adhoc.amit.jdk)
# Java VM: OpenJDK 64-Bit Server VM (fastdebug 26-internal-adhoc.amit.jdk, mixed mode, tiered, compressed oops, compressed class ptrs, g1 gc, linux-s390x)
# Problematic frame:
# V [libjvm.so+0x4149ae] BarrierSetNMethod::set_guard_value(nmethod*, int, int)+0xfe
#
# Core dump will be written. Default location: Core dumps may be processed with "/lib/systemd/systemd-coredump %P %u %g %s %t 9223372036854775808 %h %d" (or dumping to /home/amit/jdk/make/core.335189)
#
# An error report file with more information is saved as:
# /home/amit/jdk/make/hs_err_pid335189.log
     Locks owned:
   ... (rest of output omitted)