--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/debugger/win32/Win32Thread.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2001-2004 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.debugger.win32;
+
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.debugger.x86.*;
+
+class Win32Thread implements ThreadProxy {
+  private Win32Debugger debugger;
+  private int           handle;
+  private boolean       mustDuplicate;
+  private boolean       gotID;
+  private int           id;
+
+  /** The address argument must be the address of the HANDLE of the
+      desired thread in the target process. */
+  Win32Thread(Win32Debugger debugger, Address addr) {
+    this.debugger = debugger;
+    // FIXME: size of data fetched 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.handle   = (int) addr.getCIntegerAt(0, 4, true);
+    // Thread handles in the target process must be duplicated before
+    // fetching their contexts
+    mustDuplicate = true;
+    gotID = false;
+  }
+
+  /** The integer argument must be the value of a HANDLE received from
+      the "threadlist" operation. */
+  Win32Thread(Win32Debugger debugger, long handle) {
+    this.debugger = debugger;
+    this.handle   = (int) handle;
+    mustDuplicate = false;
+    gotID         = false;
+  }
+
+  public ThreadContext getContext() throws IllegalThreadStateException {
+    if (!debugger.isSuspended()) {
+      throw new IllegalThreadStateException("Target process must be suspended");
+    }
+    long[] data = debugger.getThreadIntegerRegisterSet(handle, mustDuplicate);
+    Win32ThreadContext context = new Win32ThreadContext(debugger);
+    for (int i = 0; i < data.length; i++) {
+      context.setRegister(i, data[i]);
+    }
+    return context;
+  }
+
+  public boolean canSetContext() throws DebuggerException {
+    return true;
+  }
+
+  public void setContext(ThreadContext thrCtx)
+    throws IllegalThreadStateException, DebuggerException {
+    if (!debugger.isSuspended()) {
+      throw new IllegalThreadStateException("Target process must be suspended");
+    }
+    X86ThreadContext context = (X86ThreadContext) thrCtx;
+    long[] data = new long[X86ThreadContext.NPRGREG];
+    for (int i = 0; i < data.length; i++) {
+      data[i] = context.getRegister(i);
+    }
+    debugger.setThreadIntegerRegisterSet(handle, mustDuplicate, data);
+  }
+
+  public boolean equals(Object obj) {
+    if ((obj == null) || !(obj instanceof Win32Thread)) {
+      return false;
+    }
+
+    return (((Win32Thread) obj).getThreadID() == getThreadID());
+  }
+
+  public int hashCode() {
+    return getThreadID();
+  }
+
+  public String toString() {
+    return Integer.toString(getThreadID());
+  }
+
+  /** Retrieves the thread ID of this thread by examining the Thread
+      Information Block. */
+  private int getThreadID() {
+    if (!gotID) {
+      try {
+        // Get thread context
+        X86ThreadContext context = (X86ThreadContext) getContext();
+        // Get LDT entry for FS register
+        Win32LDTEntry ldt =
+          debugger.getThreadSelectorEntry(handle,
+                                          mustDuplicate,
+                                          (int) context.getRegister(X86ThreadContext.FS));
+        // Get base address of segment = Thread Environment Block (TEB)
+        Address teb = debugger.newAddress(ldt.getBase());
+        // Thread ID is at offset 0x24
+        id = (int) teb.getCIntegerAt(0x24, 4, true);
+        gotID = true;
+      } catch (AddressException e) {
+        throw new DebuggerException(e);
+      }
+    }
+
+    return id;
+  }
+}