added SA support for TrainingReplayThread

Author: iklam

src/hotspot/share/compiler/compileBroker.cpp

@@ -804,13 +804,6 @@ Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
   Handle thread_oop = JavaThread::create_system_thread_object(name, CHECK_NH);
   return thread_oop;
 }
-class TrainingReplayThread : public JavaThread {
-  static void training_replay_thread_entry(JavaThread* thread, TRAPS);
-public:
-  TrainingReplayThread() : JavaThread(&training_replay_thread_entry) { }
-
-  bool is_hidden_from_external_view() const      { return true; }
-};
 
 void TrainingReplayThread::training_replay_thread_entry(JavaThread* thread, TRAPS) {
   CompilationPolicy::replay_training_at_init_loop(thread);

src/hotspot/share/compiler/compileBroker.hpp

@@ -31,6 +31,7 @@
 #include "compiler/compilerDirectives.hpp"
 #include "compiler/compilerThread.hpp"
 #include "runtime/atomic.hpp"
+#include "runtime/javaThread.hpp"
 #include "runtime/perfDataTypes.hpp"
 #include "utilities/stack.hpp"
 #if INCLUDE_JVMCI
@@ -446,4 +447,12 @@ class CompileBroker: AllStatic {
   static void print_heapinfo(outputStream *out, const char* function, size_t granularity);
 };
 
+class TrainingReplayThread : public JavaThread {
+  static void training_replay_thread_entry(JavaThread* thread, TRAPS);
+public:
+  TrainingReplayThread() : JavaThread(&training_replay_thread_entry) { }
+
+  bool is_hidden_from_external_view() const      { return true; }
+};
+
 #endif // SHARE_COMPILER_COMPILEBROKER_HPP

src/hotspot/share/runtime/vmStructs.cpp

@@ -1260,6 +1260,7 @@
         declare_type(ServiceThread, JavaThread)                           \
         declare_type(NotificationThread, JavaThread)                      \
         declare_type(CompilerThread, JavaThread)                          \
+        declare_type(TrainingReplayThread, JavaThread)                    \
         declare_type(StringDedupThread, JavaThread)                       \
         declare_type(AttachListenerThread, JavaThread)                    \
   declare_toplevel_type(OSThread)                                         \

src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/Threads.java

@@ -151,6 +151,7 @@ private static synchronized void initialize(TypeDataBase db) {
         virtualConstructor.addMapping("JavaThread", JavaThread.class);
         if (!VM.getVM().isCore()) {
             virtualConstructor.addMapping("CompilerThread", CompilerThread.class);
+            virtualConstructor.addMapping("TrainingReplayThread", TrainingReplayThread.class);
         }
         virtualConstructor.addMapping("JvmtiAgentThread", JvmtiAgentThread.class);
         virtualConstructor.addMapping("ServiceThread", ServiceThread.class);

src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/TrainingReplayThread.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+package sun.jvm.hotspot.runtime;
+
+import sun.jvm.hotspot.debugger.Address;
+
+public class TrainingReplayThread extends JavaThread {
+    public TrainingReplayThread(Address addr) {
+        super(addr);
+    }
+
+    public boolean isHiddenFromExternalView() { return true; }
+}