P4
When running with ubsan - enabled binaries, the following 2 issues are observed in jvmti.h (on macOS aarch64, I did not see those on Linux for some reason).
jtreg test vmTestbase/nsk/jvmti/SetVerboseFlag/setvrbflag002/TestDescription.java :
/priv/jenkins/client-home/workspace/openjdk-jdk-weekly-macos_aarch64-opt/build/support/modules_include/java.base/jvmti.h:2645:44: runtime error: load of value 4294967295, which is not a valid value for type 'jvmtiVerboseFlag'
#0 0x104453540 in _jvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag, unsigned char) jvmti.h:2645
#1 0x10444ed5c in agentProc(_jvmtiEnv*, JNIEnv_*, void*) setvrbflag002.cpp:49
#2 0x10444f1c8 in agentThreadWrapper(_jvmtiEnv*, JNIEnv_*, void*) agent_tools.cpp:151
#3 0x10914895c in JvmtiAgentThread::call_start_function() jvmtiImpl.cpp:89
#4 0x108ebd7f0 in JavaThread::thread_main_inner() javaThread.cpp:776
#5 0x1096f6094 in Thread::call_run() thread.cpp:231
#6 0x10941c37c in thread_native_entry(Thread*) os_bsd.cpp:601
#7 0x1936fef90 in _pthread_start+0x84 (libsystem_pthread.dylib:arm64e+0x6f90)
#8 0x1936f9d30 in thread_start+0x4 (libsystem_pthread.dylib:arm64e+0x1d30)
vmTestbase/nsk/jvmti/GetErrorName/geterrname002/TestDescription.java
/priv/jenkins/client-home/workspace/openjdk-jdk-weekly-macos_aarch64-opt/build/support/modules_include/java.base/jvmti.h:2640:42: runtime error: load of value 4294967295, which is not a valid value for type 'jvmtiError'
#0 0x1002b3504 in _jvmtiEnv::GetErrorName(jvmtiError, char**) jvmti.h:2640
#1 0x1002aec9c in agentProc(_jvmtiEnv*, JNIEnv_*, void*) geterrname002.cpp:50
#2 0x1002af198 in agentThreadWrapper(_jvmtiEnv*, JNIEnv_*, void*) agent_tools.cpp:151
#3 0x104f4895c in JvmtiAgentThread::call_start_function() jvmtiImpl.cpp:89
#4 0x104cbd7f0 in JavaThread::thread_main_inner() javaThread.cpp:776
#5 0x1054f6094 in Thread::call_run() thread.cpp:231
#6 0x10521c37c in thread_native_entry(Thread*) os_bsd.cpp:601
#7 0x1936fef90 in _pthread_start+0x84 (libsystem_pthread.dylib:arm64e+0x6f90)
#8 0x1936f9d30 in thread_start+0x4 (libsystem_pthread.dylib:arm64e+0x1d30)
jtreg test vmTestbase/nsk/jvmti/SetVerboseFlag/setvrbflag002/TestDescription.java :
/priv/jenkins/client-home/workspace/openjdk-jdk-weekly-macos_aarch64-opt/build/support/modules_include/java.base/jvmti.h:2645:44: runtime error: load of value 4294967295, which is not a valid value for type 'jvmtiVerboseFlag'
#0 0x104453540 in _jvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag, unsigned char) jvmti.h:2645
#1 0x10444ed5c in agentProc(_jvmtiEnv*, JNIEnv_*, void*) setvrbflag002.cpp:49
#2 0x10444f1c8 in agentThreadWrapper(_jvmtiEnv*, JNIEnv_*, void*) agent_tools.cpp:151
#3 0x10914895c in JvmtiAgentThread::call_start_function() jvmtiImpl.cpp:89
#4 0x108ebd7f0 in JavaThread::thread_main_inner() javaThread.cpp:776
#5 0x1096f6094 in Thread::call_run() thread.cpp:231
#6 0x10941c37c in thread_native_entry(Thread*) os_bsd.cpp:601
#7 0x1936fef90 in _pthread_start+0x84 (libsystem_pthread.dylib:arm64e+0x6f90)
#8 0x1936f9d30 in thread_start+0x4 (libsystem_pthread.dylib:arm64e+0x1d30)
vmTestbase/nsk/jvmti/GetErrorName/geterrname002/TestDescription.java
/priv/jenkins/client-home/workspace/openjdk-jdk-weekly-macos_aarch64-opt/build/support/modules_include/java.base/jvmti.h:2640:42: runtime error: load of value 4294967295, which is not a valid value for type 'jvmtiError'
#0 0x1002b3504 in _jvmtiEnv::GetErrorName(jvmtiError, char**) jvmti.h:2640
#1 0x1002aec9c in agentProc(_jvmtiEnv*, JNIEnv_*, void*) geterrname002.cpp:50
#2 0x1002af198 in agentThreadWrapper(_jvmtiEnv*, JNIEnv_*, void*) agent_tools.cpp:151
#3 0x104f4895c in JvmtiAgentThread::call_start_function() jvmtiImpl.cpp:89
#4 0x104cbd7f0 in JavaThread::thread_main_inner() javaThread.cpp:776
#5 0x1054f6094 in Thread::call_run() thread.cpp:231
#6 0x10521c37c in thread_native_entry(Thread*) os_bsd.cpp:601
#7 0x1936fef90 in _pthread_start+0x84 (libsystem_pthread.dylib:arm64e+0x6f90)
#8 0x1936f9d30 in thread_start+0x4 (libsystem_pthread.dylib:arm64e+0x1d30)