--- /dev/null	2021-01-19 17:38:25.908523431 +0000
+++ new/agent/src/share/classes/sun/jvm/hotspot/debugger/proc/aarch64/ProcAARCH64Thread.java	2021-01-25 19:31:17.486274146 +0000
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, Red Hat Inc.
+ * 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.debugger.proc.aarch64;
+
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.debugger.aarch64.*;
+import sun.jvm.hotspot.debugger.proc.*;
+import sun.jvm.hotspot.utilities.*;
+
+public class ProcAARCH64Thread implements ThreadProxy {
+    private ProcDebugger debugger;
+    private int         id;
+
+    public ProcAARCH64Thread(ProcDebugger debugger, Address addr) {
+        this.debugger = debugger;
+
+        // FIXME: the size here should be configurable. However, making it
+        // so would produce a dependency on the "types" package from the
+        // debugger package, which is not desired.
+        this.id       = (int) addr.getCIntegerAt(0, 4, true);
+    }
+
+    public ProcAARCH64Thread(ProcDebugger debugger, long id) {
+        this.debugger = debugger;
+        this.id = (int) id;
+    }
+
+    public ThreadContext getContext() throws IllegalThreadStateException {
+        ProcAARCH64ThreadContext context = new ProcAARCH64ThreadContext(debugger);
+        long[] regs = debugger.getThreadIntegerRegisterSet(id);
+        if (Assert.ASSERTS_ENABLED) {
+            Assert.that(regs.length == AARCH64ThreadContext.NPRGREG, "size mismatch");
+        }
+        for (int i = 0; i < regs.length; i++) {
+            context.setRegister(i, regs[i]);
+        }
+        return context;
+    }
+
+    public boolean canSetContext() throws DebuggerException {
+        return false;
+    }
+
+    public void setContext(ThreadContext context)
+    throws IllegalThreadStateException, DebuggerException {
+        throw new DebuggerException("Unimplemented");
+    }
+
+    public String toString() {
+        return "t@" + id;
+    }
+
+    public boolean equals(Object obj) {
+        if ((obj == null) || !(obj instanceof ProcAARCH64Thread)) {
+            return false;
+        }
+
+        return (((ProcAARCH64Thread) obj).id == id);
+    }
+
+    public int hashCode() {
+        return id;
+    }
+}