| /* |
| * Copyright (c) 2003, 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.runtime.linux_amd64; |
| |
| import java.io.*; |
| import java.util.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.debugger.amd64.*; |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.runtime.amd64.*; |
| import sun.jvm.hotspot.runtime.x86.*; |
| import sun.jvm.hotspot.types.*; |
| import sun.jvm.hotspot.utilities.*; |
| |
| public class LinuxAMD64JavaThreadPDAccess implements JavaThreadPDAccess { |
| private static AddressField lastJavaFPField; |
| private static AddressField osThreadField; |
| |
| // Field from OSThread |
| private static CIntegerField osThreadThreadIDField; |
| |
| // 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"); |
| osThreadField = type.getAddressField("_osthread"); |
| |
| Type anchorType = db.lookupType("JavaFrameAnchor"); |
| lastJavaFPField = anchorType.getAddressField("_last_Java_fp"); |
| |
| Type osThreadType = db.lookupType("OSThread"); |
| osThreadThreadIDField = osThreadType.getCIntegerField("_thread_id"); |
| } |
| |
| 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 |
| } |
| 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); |
| AMD64ThreadContext context = (AMD64ThreadContext) t.getContext(); |
| AMD64CurrentFrameGuess guesser = new AMD64CurrentFrameGuess(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) { |
| tty.print("Thread id: "); |
| printThreadIDOn(threadAddr, tty); |
| // tty.println("\nPostJavaState: " + getPostJavaState(threadAddr)); |
| } |
| |
| public Address getLastSP(Address addr) { |
| ThreadProxy t = getThreadProxy(addr); |
| AMD64ThreadContext context = (AMD64ThreadContext) t.getContext(); |
| return context.getRegisterAsAddress(AMD64ThreadContext.RSP); |
| } |
| |
| 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 _thread_id from the OSThread |
| Address threadIdAddr = osThreadAddr.addOffsetTo(osThreadThreadIDField.getOffset()); |
| |
| JVMDebugger debugger = VM.getVM().getDebugger(); |
| return debugger.getThreadForIdentifierAddress(threadIdAddr); |
| } |
| } |