Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/linux_sparc/LinuxSPARCJavaThreadPDAccess.java @ 12226:7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
Reviewed-by: coleenp, mgerdin, hseigel
| author | ehelin |
|---|---|
| date | Mon, 12 Aug 2013 17:37:02 +0200 |
| 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) 2006, 2007, 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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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.runtime.linux_sparc; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.debugger.sparc.*; | |
| 31 import sun.jvm.hotspot.runtime.*; | |
| 32 import sun.jvm.hotspot.runtime.sparc.*; | |
| 33 import sun.jvm.hotspot.types.*; | |
| 34 import sun.jvm.hotspot.utilities.*; | |
| 35 | |
| 36 public class LinuxSPARCJavaThreadPDAccess implements JavaThreadPDAccess { | |
| 37 private static AddressField baseOfStackPointerField; | |
| 38 private static AddressField postJavaStateField; | |
| 39 private static AddressField osThreadField; | |
| 40 private static int isPC; | |
| 41 private static int hasFlushed; | |
| 42 | |
| 43 // Field from OSThread | |
| 44 private static CIntegerField osThreadThreadIDField; | |
| 45 | |
| 46 static { | |
| 47 VM.registerVMInitializedObserver(new Observer() { | |
| 48 public void update(Observable o, Object data) { | |
| 49 initialize(VM.getVM().getTypeDataBase()); | |
| 50 } | |
| 51 }); | |
| 52 } | |
| 53 | |
| 54 private static synchronized void initialize(TypeDataBase db) { | |
| 55 Type type = db.lookupType("JavaThread"); | |
| 56 Type anchorType = db.lookupType("JavaFrameAnchor"); | |
| 57 | |
| 58 osThreadField = type.getAddressField("_osthread"); | |
| 59 hasFlushed = db.lookupIntConstant("JavaFrameAnchor::flushed").intValue(); | |
| 60 | |
| 61 type = db.lookupType("OSThread"); | |
| 62 osThreadThreadIDField = type.getCIntegerField("_thread_id"); | |
| 63 } | |
| 64 | |
| 65 public Address getLastJavaFP(Address addr) { | |
| 66 return null; | |
| 67 | |
| 68 } | |
| 69 | |
| 70 public Address getLastJavaPC(Address addr) { | |
| 71 return null; | |
| 72 } | |
| 73 | |
| 74 public Address getBaseOfStackPointer(Address addr) { | |
| 75 return baseOfStackPointerField.getValue(addr); | |
| 76 } | |
| 77 | |
| 78 public Frame getLastFramePD(JavaThread thread, Address addr) { | |
| 79 | |
| 80 // This assert doesn't work in the debugging case for threads | |
| 81 // which are running Java code and which haven't re-entered the | |
| 82 // runtime (e.g., through a Method.invoke() or otherwise). They | |
| 83 // haven't yet "decached" their last Java stack pointer to the | |
| 84 // thread. | |
| 85 | |
| 86 // if (Assert.ASSERTS_ENABLED) { | |
| 87 // Assert.that(hasLastJavaFrame(), "must have last_Java_sp() when suspended"); | |
| 88 // // FIXME: add assertion about flushing register windows for runtime system | |
| 89 // // (not appropriate for debugging system, though, unless at safepoin t) | |
| 90 // } | |
| 91 | |
| 92 // FIXME: I don't think this is necessary, but might be useful | |
| 93 // while debugging | |
| 94 if (thread.getLastJavaSP() == null) { | |
| 95 return null; | |
| 96 } | |
| 97 | |
| 98 // sparc does a lazy window flush. The _flags field of the JavaFrameAnchor | |
| 99 // encodes whether the windows have flushed. Whenever the windows have flushed | |
| 100 // there will be a last_Java_pc. | |
| 101 // In a relective system we'd have to do something to force the thread to flush | |
| 102 // its windows and give us the pc (or the younger_sp so we can find it ourselves) | |
| 103 // In a debugger situation (process or core) the flush should have happened and | |
| 104 // so if we don't have the younger sp we can find it | |
| 105 // | |
| 106 if (thread.getLastJavaPC() != null) { | |
| 107 return new SPARCFrame(SPARCFrame.biasSP(thread.getLastJavaSP()), thread.getLastJavaPC()); | |
| 108 } else { | |
| 109 Frame top = getCurrentFrameGuess(thread, addr); | |
| 110 return new SPARCFrame(SPARCFrame.biasSP(thread.getLastJavaSP()), | |
| 111 SPARCFrame.biasSP(SPARCFrame.findYoungerSP(top.getSP(), thread.getLastJavaSP())), | |
| 112 false); | |
| 113 } | |
| 114 | |
| 115 | |
| 116 } | |
| 117 | |
| 118 public RegisterMap newRegisterMap(JavaThread thread, boolean updateMap) { | |
| 119 return new SPARCRegisterMap(thread, updateMap); | |
| 120 } | |
| 121 | |
| 122 public Frame getCurrentFrameGuess(JavaThread thread, Address addr) { | |
| 123 ThreadProxy t = getThreadProxy(addr); | |
| 124 SPARCThreadContext context = (SPARCThreadContext) t.getContext(); | |
| 125 // For now, let's see what happens if we do a similar thing to | |
| 126 // what the runtime code does. I suspect this may cause us to lose | |
| 127 // the top frame from the stack. | |
| 128 Address sp = context.getRegisterAsAddress(SPARCThreadContext.R_SP); | |
| 129 Address pc = context.getRegisterAsAddress(SPARCThreadContext.R_PC); | |
| 130 | |
| 131 if ((sp == null) || (pc == null)) { | |
| 132 // Problems (have not hit this case so far, but would be bad to continue if we did) | |
| 133 return null; | |
| 134 } | |
| 135 | |
| 136 return new SPARCFrame(sp, pc); | |
| 137 } | |
| 138 | |
| 139 | |
| 140 public void printThreadIDOn(Address addr, PrintStream tty) { | |
| 141 tty.print(getThreadProxy(addr)); | |
| 142 } | |
| 143 | |
| 144 public Address getLastSP(Address addr) { | |
| 145 ThreadProxy t = getThreadProxy(addr); | |
| 146 SPARCThreadContext context = (SPARCThreadContext) t.getContext(); | |
| 147 return SPARCFrame.unBiasSP(context.getRegisterAsAddress(SPARCThreadContext.R_SP)); | |
| 148 } | |
| 149 | |
| 150 public void printInfoOn(Address threadAddr, PrintStream tty) { | |
| 151 } | |
| 152 | |
| 153 public ThreadProxy getThreadProxy(Address addr) { | |
| 154 // Fetch the OSThread (for now and for simplicity, not making a | |
| 155 // separate "OSThread" class in this package) | |
| 156 Address osThreadAddr = osThreadField.getValue(addr); | |
| 157 // Get the address of the thread ID from the OSThread | |
| 158 Address tidAddr = osThreadAddr.addOffsetTo(osThreadThreadIDField.getOffset()); | |
| 159 | |
| 160 JVMDebugger debugger = VM.getVM().getDebugger(); | |
| 161 return debugger.getThreadForIdentifierAddress(tidAddr); | |
| 162 } | |
| 163 | |
| 164 | |
| 165 } |