8000973: SA on windows thread inspection is broken

Summary: After bug 7161732, On Windows SA could not find correct address of thread_id of OSThread since _thread_id moved to end of the class . The presupposition of the address is following thread handle no longer stands. Fix by adding thread_id field to OSThread and getting the  address directly from OSThread.
Reviewed-by: nloodin, sspitsyn
Contributed-by: yumin.qi@oracle.com

agent/src/share/classes/sun/jvm/hotspot/debugger/windbg/amd64/WindbgAMD64Thread.java

 /*
- * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2013, 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
@@ -34,21 +34,11 @@ class WindbgAMD64Thread implements ThreadProxy {
   private boolean        gotID;
   private long           id;
 
-  /** The address argument must be the address of the HANDLE of the
-      desired thread in the target process. */
+  // The address argument must be the address of the OSThread::_thread_id
   WindbgAMD64Thread(WindbgDebugger 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.
-
-    // another hack here is that we use sys thread id instead of handle.
-    // windbg can't get details based on handles it seems.
-    // I assume that osThread_win32 thread struct has _thread_id (which
-    // sys thread id) just after handle field.
-
-    this.sysId   = (int) addr.addOffsetTo(debugger.getAddressSize()).getCIntegerAt(0, 4, true);
-    gotID = false;
+    this.sysId    = (long)addr.getCIntegerAt(0, 4, true);
+    gotID         = false;
   }
 
   WindbgAMD64Thread(WindbgDebugger debugger, long sysId) {

agent/src/share/classes/sun/jvm/hotspot/debugger/windbg/x86/WindbgX86Thread.java

 /*
- * Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2013, 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
@@ -34,21 +34,11 @@ class WindbgX86Thread implements ThreadProxy {
   private boolean        gotID;
   private long           id;
 
-  /** The address argument must be the address of the HANDLE of the
-      desired thread in the target process. */
+  // The address argument must be the address of OSThread::_thread_id
   WindbgX86Thread(WindbgDebugger 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.
-
-    // another hack here is that we use sys thread id instead of handle.
-    // windbg can't get details based on handles it seems.
-    // I assume that osThread_win32 thread struct has _thread_id (which
-    // sys thread id) just after handle field.
-
-    this.sysId   = (int) addr.addOffsetTo(debugger.getAddressSize()).getCIntegerAt(0, 4, true);
-    gotID = false;
+    this.sysId    = (long)addr.getCIntegerAt(0, 4, true);
+    gotID         = false;
   }
 
   WindbgX86Thread(WindbgDebugger debugger, long sysId) {

agent/src/share/classes/sun/jvm/hotspot/runtime/OSThread.java

 /*
- * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2004, 2013, 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
@@ -32,6 +32,7 @@ import sun.jvm.hotspot.types.*;
 // to the sys_thread_t structure of the classic JVM implementation.
 public class OSThread extends VMObject {
     private static JIntField interruptedField;
+    private static JIntField threadIdField;
     static {
         VM.registerVMInitializedObserver(new Observer() {
             public void update(Observable o, Object data) {
@@ -43,6 +44,7 @@ public class OSThread extends VMObject {
     private static synchronized void initialize(TypeDataBase db) {
         Type type = db.lookupType("OSThread");
         interruptedField = type.getJIntField("_interrupted");
+        threadIdField = type.getJIntField("_thread_id");
     }
 
     public OSThread(Address addr) {
@@ -52,4 +54,9 @@ public class OSThread extends VMObject {
     public boolean interrupted() {
         return ((int)interruptedField.getValue(addr)) != 0;
     }
+
+    public int threadId() {
+        return (int)threadIdField.getValue(addr);
+    }
+
 }

agent/src/share/classes/sun/jvm/hotspot/runtime/win32_amd64/Win32AMD64JavaThreadPDAccess.java

 /*
- * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2013, 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
@@ -43,7 +43,7 @@ public class Win32AMD64JavaThreadPDAccess implements JavaThreadPDAccess {
   private static AddressField  osThreadField;
 
   // Field from OSThread
-  private static Field         osThreadThreadHandleField;
+  private static Field         osThreadThreadIdField;
 
   // This is currently unneeded but is being kept in case we change
   // the currentFrameGuess algorithm
@@ -64,7 +64,7 @@ public class Win32AMD64JavaThreadPDAccess implements JavaThreadPDAccess {
     osThreadField           = type.getAddressField("_osthread");
 
     type = db.lookupType("OSThread");
-    osThreadThreadHandleField = type.getField("_thread_handle");
+    osThreadThreadIdField = type.getField("_thread_id");
   }
 
   public Address getLastJavaFP(Address addr) {
@@ -128,10 +128,10 @@ public class Win32AMD64JavaThreadPDAccess implements JavaThreadPDAccess {
     // 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());
+    // Get the address of the thread_id within the OSThread
+    Address threadIdAddr =
+      osThreadAddr.addOffsetTo(osThreadThreadIdField.getOffset());
     JVMDebugger debugger = VM.getVM().getDebugger();
-    return debugger.getThreadForIdentifierAddress(threadHandleAddr);
+    return debugger.getThreadForIdentifierAddress(threadIdAddr);
   }
 }

agent/src/share/classes/sun/jvm/hotspot/runtime/win32_x86/Win32X86JavaThreadPDAccess.java

 /*
- * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2013, 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
@@ -42,7 +42,7 @@ public class Win32X86JavaThreadPDAccess implements JavaThreadPDAccess {
   private static AddressField  osThreadField;
 
   // Field from OSThread
-  private static Field         osThreadThreadHandleField;
+  private static Field         osThreadThreadIdField;
 
   // This is currently unneeded but is being kept in case we change
   // the currentFrameGuess algorithm
@@ -63,7 +63,7 @@ public class Win32X86JavaThreadPDAccess implements JavaThreadPDAccess {
     osThreadField           = type.getAddressField("_osthread");
 
     type = db.lookupType("OSThread");
-    osThreadThreadHandleField = type.getField("_thread_handle");
+    osThreadThreadIdField = type.getField("_thread_id");
   }
 
   public Address getLastJavaFP(Address addr) {
@@ -127,10 +127,10 @@ public class Win32X86JavaThreadPDAccess implements JavaThreadPDAccess {
     // 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());
+    // Get the address of the thread_id within the OSThread
+    Address threadIdAddr =
+      osThreadAddr.addOffsetTo(osThreadThreadIdField.getOffset());
     JVMDebugger debugger = VM.getVM().getDebugger();
-    return debugger.getThreadForIdentifierAddress(threadHandleAddr);
+    return debugger.getThreadForIdentifierAddress(threadIdAddr);
   }
 }