Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/utilities/PointerFinder.java @ 3945:8ed53447f690
Merge
author | iveresov |
---|---|
date | Thu, 15 Sep 2011 12:44:09 -0700 |
parents | 3e8fbc61cee8 |
children | da91efe96a93 |
line wrap: on
line source
/* * Copyright (c) 2000, 2010, 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.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.inBlobCode = loc.blob.codeContains(a); loc.inBlobData = loc.blob.dataContains(a); if (loc.blob.isNMethod()) { NMethod nm = (NMethod) loc.blob; loc.inBlobOops = nm.oopsContains(a); } loc.inBlobUnknownLocation = (!(loc.inBlobCode || 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; } }