--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/utilities/PointerFinder.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,149 @@
+/*
+ * Copyright 2000-2004 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.utilities;
+
+import sun.jvm.hotspot.code.*;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.gc_interface.*;
+import sun.jvm.hotspot.interpreter.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.memory.*;
+
+/** This class, only intended for use in the debugging system,
+    provides the functionality of find() in the VM. */
+
+public class PointerFinder {
+  public static PointerLocation find(Address a) {
+    PointerLocation loc = new PointerLocation(a);
+
+    CollectedHeap heap = VM.getVM().getUniverse().heap();
+    if (heap instanceof GenCollectedHeap) {
+      GenCollectedHeap genheap = (GenCollectedHeap) heap;
+      if (genheap.isIn(a)) {
+        for (int i = 0; i < genheap.nGens(); i++) {
+          Generation g = genheap.getGen(i);
+          if (g.isIn(a)) {
+            loc.gen = g;
+            break;
+          }
+        }
+
+        if (loc.gen == null) {
+          // Should be in perm gen
+          Generation permGen = genheap.permGen();
+          if (Assert.ASSERTS_ENABLED) {
+            Assert.that(permGen.isIn(a), "should have been in ordinary or perm gens if it's in the heap");
+          }
+          loc.permGen = permGen;
+        }
+
+        if (VM.getVM().getUseTLAB()) {
+          // Try to find thread containing it
+          for (JavaThread t = VM.getVM().getThreads().first(); t != null; t = t.next()) {
+            ThreadLocalAllocBuffer tlab = t.tlab();
+            if (tlab.contains(a)) {
+              loc.inTLAB = true;
+              loc.tlabThread = t;
+              loc.tlab = tlab;
+              break;
+            }
+          }
+        }
+
+        return loc;
+      }
+    } else {
+      if (heap.isIn(a)) {
+        loc.heap = heap;
+        return loc;
+      }
+    }
+
+    Interpreter interp = VM.getVM().getInterpreter();
+    if (interp.contains(a)) {
+      loc.inInterpreter = true;
+      loc.interpreterCodelet = interp.getCodeletContaining(a);
+      return loc;
+    }
+
+    if (!VM.getVM().isCore()) {
+      CodeCache c = VM.getVM().getCodeCache();
+      if (c.contains(a)) {
+        loc.inCodeCache = true;
+        loc.blob = c.findBlobUnsafe(a);
+        if (Assert.ASSERTS_ENABLED) {
+          Assert.that(loc.blob != null, "Should have found CodeBlob");
+        }
+        loc.inBlobInstructions = loc.blob.instructionsContains(a);
+        loc.inBlobData         = loc.blob.dataContains(a);
+        loc.inBlobOops         = loc.blob.oopsContains(a);
+        loc.inBlobUnknownLocation = (!(loc.inBlobInstructions ||
+                                       loc.inBlobData ||
+                                       loc.inBlobOops));
+        return loc;
+      }
+    }
+
+    // Check JNIHandles; both local and global
+    JNIHandles handles = VM.getVM().getJNIHandles();
+    JNIHandleBlock handleBlock = handles.globalHandles();
+    if (handleBlock != null) {
+      handleBlock = handleBlock.blockContainingHandle(a);
+    }
+    if (handleBlock != null) {
+      loc.inStrongGlobalJNIHandleBlock = true;
+      loc.handleBlock = handleBlock;
+      return loc;
+    } else {
+      handleBlock = handles.weakGlobalHandles();
+      if (handleBlock != null) {
+        handleBlock = handleBlock.blockContainingHandle(a);
+        if (handleBlock != null) {
+          loc.inWeakGlobalJNIHandleBlock = true;
+          loc.handleBlock = handleBlock;
+          return loc;
+        } else {
+          // Look in thread-local handles
+          for (JavaThread t = VM.getVM().getThreads().first(); t != null; t = t.next()) {
+            handleBlock = t.activeHandles();
+            if (handleBlock != null) {
+              handleBlock = handleBlock.blockContainingHandle(a);
+              if (handleBlock != null) {
+                loc.inLocalJNIHandleBlock = true;
+                loc.handleBlock = handleBlock;
+                loc.handleThread = t;
+                return loc;
+              }
+            }
+          }
+        }
+      }
+    }
+
+
+    // Fall through; have to return it anyway.
+    return loc;
+  }
+}