Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/linux_x86/LinuxX86JavaThreadPDAccess.java @ 11054:38ea2efa32a7
8010278: SA: provide mechanism for using an alternative SA debugger back-end.
Reviewed-by: sla, dsamersoff
| author | kevinw |
|---|---|
| date | Wed, 26 Jun 2013 00:01:20 +0100 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.runtime.linux_x86; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.debugger.x86.*; | |
| 31 import sun.jvm.hotspot.runtime.*; | |
| 32 import sun.jvm.hotspot.runtime.x86.*; | |
| 33 import sun.jvm.hotspot.types.*; | |
| 34 import sun.jvm.hotspot.utilities.*; | |
| 35 | |
| 36 public class LinuxX86JavaThreadPDAccess implements JavaThreadPDAccess { | |
| 37 private static AddressField lastJavaFPField; | |
| 38 private static AddressField osThreadField; | |
| 39 | |
| 40 // Field from OSThread | |
| 41 private static CIntegerField osThreadThreadIDField; | |
| 42 | |
| 43 // This is currently unneeded but is being kept in case we change | |
| 44 // the currentFrameGuess algorithm | |
| 45 private static final long GUESS_SCAN_RANGE = 128 * 1024; | |
| 46 | |
| 47 static { | |
| 48 VM.registerVMInitializedObserver(new Observer() { | |
| 49 public void update(Observable o, Object data) { | |
| 50 initialize(VM.getVM().getTypeDataBase()); | |
| 51 } | |
| 52 }); | |
| 53 } | |
| 54 | |
| 55 private static synchronized void initialize(TypeDataBase db) { | |
| 56 Type type = db.lookupType("JavaThread"); | |
| 57 osThreadField = type.getAddressField("_osthread"); | |
| 58 | |
| 59 Type anchorType = db.lookupType("JavaFrameAnchor"); | |
| 60 lastJavaFPField = anchorType.getAddressField("_last_Java_fp"); | |
| 61 | |
| 62 Type osThreadType = db.lookupType("OSThread"); | |
| 63 osThreadThreadIDField = osThreadType.getCIntegerField("_thread_id"); | |
| 64 } | |
| 65 | |
| 66 public Address getLastJavaFP(Address addr) { | |
| 67 return lastJavaFPField.getValue(addr.addOffsetTo(sun.jvm.hotspot.runtime.JavaThread.getAnchorField().getOffset())); | |
| 68 } | |
| 69 | |
| 70 public Address getLastJavaPC(Address addr) { | |
| 71 return null; | |
| 72 } | |
| 73 | |
| 74 public Address getBaseOfStackPointer(Address addr) { | |
| 75 return null; | |
| 76 } | |
| 77 | |
| 78 public Frame getLastFramePD(JavaThread thread, Address addr) { | |
| 79 Address fp = thread.getLastJavaFP(); | |
| 80 if (fp == null) { | |
| 81 return null; // no information | |
| 82 } | |
| 83 return new X86Frame(thread.getLastJavaSP(), fp); | |
| 84 } | |
| 85 | |
| 86 public RegisterMap newRegisterMap(JavaThread thread, boolean updateMap) { | |
| 87 return new X86RegisterMap(thread, updateMap); | |
| 88 } | |
| 89 | |
| 90 public Frame getCurrentFrameGuess(JavaThread thread, Address addr) { | |
| 91 ThreadProxy t = getThreadProxy(addr); | |
| 92 X86ThreadContext context = (X86ThreadContext) t.getContext(); | |
| 93 X86CurrentFrameGuess guesser = new X86CurrentFrameGuess(context, thread); | |
| 94 if (!guesser.run(GUESS_SCAN_RANGE)) { | |
| 95 return null; | |
| 96 } | |
| 97 if (guesser.getPC() == null) { | |
| 98 return new X86Frame(guesser.getSP(), guesser.getFP()); | |
| 99 } else { | |
| 100 return new X86Frame(guesser.getSP(), guesser.getFP(), guesser.getPC()); | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 public void printThreadIDOn(Address addr, PrintStream tty) { | |
| 105 tty.print(getThreadProxy(addr)); | |
| 106 } | |
| 107 | |
| 108 public void printInfoOn(Address threadAddr, PrintStream tty) { | |
| 109 tty.print("Thread id: "); | |
| 110 printThreadIDOn(threadAddr, tty); | |
| 111 // tty.println("\nPostJavaState: " + getPostJavaState(threadAddr)); | |
| 112 } | |
| 113 | |
| 114 public Address getLastSP(Address addr) { | |
| 115 ThreadProxy t = getThreadProxy(addr); | |
| 116 X86ThreadContext context = (X86ThreadContext) t.getContext(); | |
| 117 return context.getRegisterAsAddress(X86ThreadContext.ESP); | |
| 118 } | |
| 119 | |
| 120 public ThreadProxy getThreadProxy(Address addr) { | |
| 121 // Addr is the address of the JavaThread. | |
| 122 // Fetch the OSThread (for now and for simplicity, not making a | |
| 123 // separate "OSThread" class in this package) | |
| 124 Address osThreadAddr = osThreadField.getValue(addr); | |
| 125 // Get the address of the _thread_id from the OSThread | |
| 126 Address threadIdAddr = osThreadAddr.addOffsetTo(osThreadThreadIDField.getOffset()); | |
| 127 | |
| 128 JVMDebugger debugger = VM.getVM().getDebugger(); | |
| 129 return debugger.getThreadForIdentifierAddress(threadIdAddr); | |
| 130 } | |
| 131 } |