--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/runtime/win32_x86/Win32X86JavaThreadPDAccess.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,137 @@
+/*
+ * Copyright 2000-2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package sun.jvm.hotspot.runtime.win32_x86;
+
+import java.io.*;
+import java.util.*;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.debugger.win32.*;
+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.*;
+
+/** This class is only public to allow using the VMObjectFactory to
+    instantiate these.
+*/
+
+public class Win32X86JavaThreadPDAccess implements JavaThreadPDAccess {
+  private static AddressField  lastJavaFPField;
+  private static AddressField  osThreadField;
+
+  // Field from OSThread
+  private static Field         osThreadThreadHandleField;
+
+  // 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");
+    osThreadThreadHandleField = type.getField("_thread_handle");
+  }
+
+  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) {
+    // Addr is the address of the JavaThread.
+    // 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 HANDLE within the OSThread
+    Address threadHandleAddr =
+      osThreadAddr.addOffsetTo(osThreadThreadHandleField.getOffset());
+    JVMDebugger debugger = VM.getVM().getDebugger();
+    return debugger.getThreadForIdentifierAddress(threadHandleAddr);
+  }
+}