--- old/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/solaris_x86/SolarisX86JavaThreadPDAccess.java	2020-05-20 18:11:12.654989017 -0700
+++ /dev/null	2020-03-09 18:57:19.455001459 -0700
@@ -1,142 +0,0 @@
-/*
- * Copyright (c) 2000, 2020, 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.solaris_x86;
-
-import java.io.*;
-import java.util.*;
-import sun.jvm.hotspot.debugger.*;
-import sun.jvm.hotspot.debugger.x86.*;
-import sun.jvm.hotspot.runtime.*;
-import sun.jvm.hotspot.runtime.x86.*;
-import sun.jvm.hotspot.types.*;
-import sun.jvm.hotspot.utilities.*;
-import sun.jvm.hotspot.utilities.Observable;
-import sun.jvm.hotspot.utilities.Observer;
-
-/** Placeholder for now to allow us to start the SA without support
-    for stack traces */
-
-public class SolarisX86JavaThreadPDAccess implements JavaThreadPDAccess {
-  private static AddressField lastJavaFPField;
-  private static AddressField osThreadField;
-  private static AddressField baseOfStackPointerField;
-
-  // Field from OSThread
-  private static CIntegerField osThreadThreadIDField;
-
-  // This is currently unneeded but is being kept in case we change
-  // the currentFrameGuess algorithm
-  private static final long GUESS_SCAN_RANGE = 128 * 1024;
-
-
-  static {
-    VM.registerVMInitializedObserver(new Observer() {
-        public void update(Observable o, Object data) {
-          initialize(VM.getVM().getTypeDataBase());
-        }
-      });
-  }
-
-  private static synchronized void initialize(TypeDataBase db) {
-    Type type = db.lookupType("JavaThread");
-    Type anchorType = db.lookupType("JavaFrameAnchor");
-
-    lastJavaFPField    = anchorType.getAddressField("_last_Java_fp");
-    osThreadField      = type.getAddressField("_osthread");
-
-    type = db.lookupType("OSThread");
-    osThreadThreadIDField   = type.getCIntegerField("_thread_id");
-  }
-
-  public    Address getLastJavaFP(Address addr) {
-    return lastJavaFPField.getValue(addr.addOffsetTo(sun.jvm.hotspot.runtime.JavaThread.getAnchorField().getOffset()));
-  }
-
-  public    Address getLastJavaPC(Address addr) {
-    return null;
-  }
-
-  public Address getBaseOfStackPointer(Address addr) {
-    return null;
-  }
-
-  public Frame getLastFramePD(JavaThread thread, Address addr) {
-    Address fp = thread.getLastJavaFP();
-    if (fp == null) {
-      return null; // no information
-    }
-    Address pc =  thread.getLastJavaPC();
-    if ( pc != null ) {
-      return new X86Frame(thread.getLastJavaSP(), fp, pc);
-    } else {
-      return new X86Frame(thread.getLastJavaSP(), fp);
-    }
-  }
-
-  public RegisterMap newRegisterMap(JavaThread thread, boolean updateMap) {
-    return new X86RegisterMap(thread, updateMap);
-  }
-
-  public Frame getCurrentFrameGuess(JavaThread thread, Address addr) {
-    ThreadProxy t = getThreadProxy(addr);
-    X86ThreadContext context = (X86ThreadContext) t.getContext();
-    X86CurrentFrameGuess guesser = new X86CurrentFrameGuess(context, thread);
-    if (!guesser.run(GUESS_SCAN_RANGE)) {
-      return null;
-    }
-    if (guesser.getPC() == null) {
-      return new X86Frame(guesser.getSP(), guesser.getFP());
-    } else {
-      return new X86Frame(guesser.getSP(), guesser.getFP(), guesser.getPC());
-    }
-  }
-
-
-  public void printThreadIDOn(Address addr, PrintStream tty) {
-    tty.print(getThreadProxy(addr));
-  }
-
-
-  public void printInfoOn(Address threadAddr, PrintStream tty) {
-  }
-
-  public Address getLastSP(Address addr) {
-    ThreadProxy t = getThreadProxy(addr);
-    X86ThreadContext context = (X86ThreadContext) t.getContext();
-    return context.getRegisterAsAddress(X86ThreadContext.ESP);
-  }
-
-  public ThreadProxy getThreadProxy(Address addr) {
-    // Fetch the OSThread (for now and for simplicity, not making a
-    // separate "OSThread" class in this package)
-    Address osThreadAddr = osThreadField.getValue(addr);
-    // Get the address of the thread ID from the OSThread
-    Address tidAddr = osThreadAddr.addOffsetTo(osThreadThreadIDField.getOffset());
-
-    JVMDebugger debugger = VM.getVM().getDebugger();
-    return debugger.getThreadForIdentifierAddress(tidAddr);
-  }
-
-}