Fix crashes on Apple Silicon (openjdk#5)

See explanation in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265284#c10

From: NetBSD port (but with additional portability tweaks)
Authored by: pho@netbsd.org

Author: battleblow

src/hotspot/cpu/aarch64/jniFastGetField_aarch64.cpp

@@ -58,7 +58,7 @@ static const Register result        = r7;
 // (8262896).  So each FastGetXXXField is wrapped into a C++ statically
 // compiled template function that optionally switches to WXExec if necessary.
 
-#ifdef __APPLE__
+#ifdef _ALLBSD_SOURCE
 
 static address generated_fast_get_field[T_LONG + 1 - T_BOOLEAN];
 
@@ -86,14 +86,14 @@ address JNI_FastGetField::generate_fast_get_int_field1() {
   return (address)static_fast_get_field_wrapper<BType>;
 }
 
-#else // __APPLE__
+#else // _ALLBSD_SOURCE
 
 template<int BType>
 address JNI_FastGetField::generate_fast_get_int_field1() {
   return generate_fast_get_int_field0((BasicType)BType);
 }
 
-#endif // __APPLE__
+#endif // _ALLBSD_SOURCE
 
 address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) {
   const char *name;

src/hotspot/os_cpu/bsd_aarch64/os_bsd_aarch64.cpp

@@ -253,7 +253,7 @@ bool PosixSignals::pd_hotspot_signal_handler(int sig, siginfo_t* info,
                                              ucontext_t* uc, JavaThread* thread) {
   // Enable WXWrite: this function is called by the signal handler at arbitrary
   // point of execution.
-  MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, thread));
+  ThreadWXEnable wx(WXWrite, thread);
 
   // decide if this trap can be handled by a stub
   address stub = nullptr;

src/hotspot/share/c1/c1_Runtime1.cpp

@@ -1339,7 +1339,7 @@ void Runtime1::patch_code(JavaThread* current, C1StubId stub_id) {
 
   // Enable WXWrite: the function is called by c1 stub as a runtime function
   // (see another implementation above).
-  MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
+  BSD_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
 
   if (TracePatching) {
     tty->print_cr("Deoptimizing because patch is needed");

src/hotspot/share/gc/shared/barrierSetNMethod.cpp

@@ -167,7 +167,7 @@ void BarrierSetNMethod::arm_all_nmethods() {
 int BarrierSetNMethod::nmethod_stub_entry_barrier(address* return_address_ptr) {
   // Enable WXWrite: the function is called directly from nmethod_entry_barrier
   // stub.
-  MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, Thread::current()));
+  BSD_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, Thread::current()));
 
   address return_address = *return_address_ptr;
   AARCH64_PORT_ONLY(return_address = pauth_strip_pointer(return_address));

src/hotspot/share/gc/shenandoah/shenandoahBarrierSetNMethod.cpp

@@ -51,7 +51,7 @@ bool ShenandoahBarrierSetNMethod::nmethod_entry_barrier(nmethod* nm) {
     return true;
   }
 
-  MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, Thread::current());)
+  BSD_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, Thread::current());)
 
   if (nm->is_unloading()) {
     // We don't need to take the lock when unlinking nmethods from

src/hotspot/share/gc/z/zBarrierSetNMethod.cpp

@@ -55,7 +55,7 @@ bool ZBarrierSetNMethod::nmethod_entry_barrier(nmethod* nm) {
     return true;
   }
 
-  MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, Thread::current()));
+  BSD_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, Thread::current()));
 
   if (nm->is_unloading()) {
     log_develop_trace(gc, nmethod)("nmethod: " PTR_FORMAT " visited by entry (unloading)", p2i(nm));

src/hotspot/share/interpreter/interpreterRuntime.cpp

@@ -1019,7 +1019,7 @@ JRT_END
 
 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
   // Enable WXWrite: the function is called directly by interpreter.
-  MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
+  BSD_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
 
   // frequency_counter_overflow_inner can throw async exception.
   nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);

src/hotspot/share/jfr/instrumentation/jfrJvmtiAgent.cpp

@@ -143,7 +143,7 @@ void JfrJvmtiAgent::retransform_classes(JNIEnv* env, jobjectArray classes_array,
   }
   ResourceMark rm(THREAD);
   // WXWrite is needed before entering the vm below and in callee methods.
-  MACOS_AARCH64_ONLY(ThreadWXEnable __wx(WXWrite, THREAD));
+  BSD_AARCH64_ONLY(ThreadWXEnable __wx(WXWrite, THREAD));
   jclass* const classes = create_classes_array(classes_count, CHECK);
   assert(classes != nullptr, "invariant");
   for (jint i = 0; i < classes_count; i++) {

src/hotspot/share/jfr/jni/jfrJniMethod.cpp

@@ -107,7 +107,7 @@ NO_TRANSITION(void, jfr_set_enabled(JNIEnv* env, jclass jvm, jlong event_type_id
   JfrEventSetting::set_enabled(event_type_id, JNI_TRUE == enabled);
   if (EventOldObjectSample::eventId == event_type_id) {
     JavaThread* thread = JavaThread::thread_from_jni_environment(env);
-    MACOS_AARCH64_ONLY(ThreadWXEnable __wx(WXWrite, thread));
+    BSD_AARCH64_ONLY(ThreadWXEnable __wx(WXWrite, thread));
     ThreadInVMfromNative transition(thread);
     if (JNI_TRUE == enabled) {
       LeakProfiler::start(JfrOptionSet::old_object_queue_size());

src/hotspot/share/jfr/recorder/service/jfrRecorderService.cpp

@@ -700,7 +700,7 @@ void JfrRecorderService::emit_leakprofiler_events(int64_t cutoff_ticks, bool emi
   JfrRotationLock lock;
   // Take the rotation lock before the transition.
   JavaThread* current_thread = JavaThread::current();
-  MACOS_AARCH64_ONLY(ThreadWXEnable __wx(WXWrite, current_thread));
+  BSD_AARCH64_ONLY(ThreadWXEnable __wx(WXWrite, current_thread));
   ThreadInVMfromNative transition(current_thread);
   LeakProfiler::emit_events(cutoff_ticks, emit_all, skip_bfs);
 }