CPUIDBrandString stub is generated on demand

The fix for JDK-8138922 introduced a new assert in stubCodeGenerator.hpp. This assert is triggered with the JFR:

# Internal Error (/opt/jprt/T/P1/005544.dpochepk/s/hotspot/src/share/vm/runtime/stubCodeGenerator.hpp:72), pid=12594, tid=12727
# assert(!_frozen) failed: no modifications allowed

Stack: [0xc2f5e000,0xc2faf000], sp=0xc2fac360, free space=312k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x11c7507] VMError::report_and_die(int, char const*, char const*, char*, Thread*, unsigned char*, void*, void*, char const*, int, unsigned int)+0x137;; VMError::report_and_die(int, char const*, char const*, char*, Thread*, unsigned char*, void*, void*, char const*, int, unsigned int)+0x137
V [libjvm.so+0x11c8120] VMError::report_and_die(Thread*, char const*, int, char const*, char const*, char*)+0x30;; VMError::report_and_die(Thread*, char const*, int, char const*, char const*, char*)+0x30
V [libjvm.so+0x7e4500] report_vm_error(char const*, int, char const*, char const*, ...)+0x60;; report_vm_error(char const*, int, char const*, char const*, ...)+0x60
V [libjvm.so+0x10933fa] StubCodeMark::StubCodeMark(StubCodeGenerator*, char const*, char const*)+0x14a;; StubCodeMark::StubCodeMark(StubCodeGenerator*, char const*, char const*)+0x14a
V [libjvm.so+0x12005c1] VM_Version_Ext_StubGenerator::generate_getCPUIDBrandString()+0xd1;; VM_Version_Ext_StubGenerator::generate_getCPUIDBrandString()+0xd1
V [libjvm.so+0x11fdac3] VM_Version_Ext::generate_cpuid_brand_string_code()+0x103;; VM_Version_Ext::generate_cpuid_brand_string_code()+0x103
V [libjvm.so+0x11fdeab] VM_Version_Ext::cpu_brand_string()+0xab;; VM_Version_Ext::cpu_brand_string()+0xab
V [libjvm.so+0x11ff2d1] VM_Version_Ext::cpu_detailed_description(char*, unsigned int)+0x91;; VM_Version_Ext::cpu_detailed_description(char*, unsigned int)+0x91
V [libjvm.so+0x11ffbd8] VM_Version_Ext::cpu_description()+0x28;; VM_Version_Ext::cpu_description()+0x28
V [libjvm.so+0xef9c63] CPUInformationInterface::initialize()+0x83;; CPUInformationInterface::initialize()+0x83
V [libjvm.so+0xb0bc59] JfrOSInterface::initialize()+0x79;; JfrOSInterface::initialize()+0x79
V [libjvm.so+0xaecc13] Jfr::initialize_stage_one()+0x353;; Jfr::initialize_stage_one()+0x353
V [libjvm.so+0xaf0934] JfrActivator::start()+0x154;; JfrActivator::start()+0x154
V [libjvm.so+0xb02a2d] JNI2JFR_start_flight_recorder+0x17d;; JNI2JFR_start_flight_recorder+0x17d
C [libjfr.so+0x1c3b] Java_oracle_jrockit_jfr_JFR_startFlightRecorder+0x2b;; Java_oracle_jrockit_jfr_JFR_startFlightRecorder+0x2b
J 4714 oracle.jrockit.jfr.JFR.startFlightRecorder()Z (0 bytes) @ 0xee65411f [0xee6540a0+0x0000007f]
J 4713 C1 oracle.jrockit.jfr.JFR.startInternal()V (79 bytes) @ 0xe7807cc4 [0xe7807c80+0x00000044]
J 4707 C1 oracle.jrockit.jfr.JFR.tryLazyStart()V (151 bytes) @ 0xe78066b0 [0xe7806600+0x000000b0]
J 4705 C1 oracle.jrockit.jfr.JFR.get()Loracle/jrockit/jfr/JFR; (50 bytes) @ 0xe7805de0 [0xe7805ba0+0x00000240]
v ~StubRoutines::call_stub
V [libjvm.so+0xacdd5c] JavaCalls::call_helper(JavaValue*, methodHandle const&, JavaCallArguments*, Thread*)+0x73c;; .L602+0x304
V [libjvm.so+0xeeeda9] os::os_exception_wrapper(void (*)(JavaValue*, methodHandle const&, JavaCallArguments*, Thread*), JavaValue*, methodHandle const&, JavaCallArguments*, Thread*)+0x19;; os::os_exception_wrapper(void (*)(JavaValue*, methodHandle const&, JavaCallArguments*, Thread*), JavaValue*, methodHandle const&, JavaCallArguments*, Thread*)+0x19
V [libjvm.so+0xacd246] JavaCalls::call(JavaValue*, methodHandle const&, JavaCallArguments*, Thread*)+0x66;; JavaCalls::call(JavaValue*, methodHandle const&, JavaCallArguments*, Thread*)+0x66
V [libjvm.so+0xb40869] jni_invoke_static(JNIEnv_*, JavaValue*, _jobject*, JNICallType, _jmethodID*, JNI_ArgumentPusher*, Thread*) [clone .isra.119] [clone .constprop.130]+0x3e9;; .L1078+0x5a
V [libjvm.so+0xb5895a] jni_CallStaticObjectMethod+0x16a;; jni_CallStaticObjectMethod+0x16a
C [libjfr.so+0xfeb] ensure_java_inited+0xab;; ensure_java_inited+0xab
C [libjfr.so+0x10e3] JFR_java_callback_start_recording+0x63;; JFR_java_callback_start_recording+0x63
V [libjvm.so+0xafabf9] JFR2JNI_start_recording(char const*, unsigned int, char const**, bool, long long, long long, char const*, bool, long long, long long, bool, Thread*)+0x1e9;; JFR2JNI_start_recording(char const*, unsigned int, char const**, bool, long long, long long, char const*, bool, long long, long long, bool, Thread*)+0x1e9
V [libjvm.so+0xaff8c1] StartFlightRecordingDCmd::execute(DCmdSource, Thread*)+0x211;; StartFlightRecordingDCmd::execute(DCmdSource, Thread*)+0x211
V [libjvm.so+0x8a8b9c] DCmd::parse_and_execute(DCmdSource, outputStream*, char const*, char, Thread*)+0x1ec;; DCmd::parse_and_execute(DCmdSource, outputStream*, char const*, char, Thread*)+0x1ec
V [libjvm.so+0x490242] jcmd(AttachOperation*, outputStream*)+0x42;; jcmd(AttachOperation*, outputStream*)+0x42
V [libjvm.so+0x491e4a] attach_listener_thread_entry(JavaThread*, Thread*)+0x2ba;; attach_listener_thread_entry(JavaThread*, Thread*)+0x2ba
V [libjvm.so+0x1138b93] JavaThread::thread_main_inner()+0x1d3;; JavaThread::thread_main_inner()+0x1d3
V [libjvm.so+0x1138e62] JavaThread::run()+0x232;; JavaThread::run()+0x232
V [libjvm.so+0xee720c] java_start(Thread*)+0xdc;; java_start(Thread*)+0xdc
C [libpthread.so.0+0x6b5a] start_thread+0xca
C [libc.so.6+0xf7e1e] clone+0x5e