| /* |
| * Copyright (c) 2000, 2006, 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.solaris_sparc; |
| |
| import java.io.*; |
| import java.util.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.debugger.sparc.*; |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.runtime.sparc.*; |
| import sun.jvm.hotspot.types.*; |
| import sun.jvm.hotspot.utilities.*; |
| |
| public class SolarisSPARCJavaThreadPDAccess implements JavaThreadPDAccess { |
| private static AddressField baseOfStackPointerField; |
| private static AddressField postJavaStateField; |
| private static AddressField osThreadField; |
| private static int isPC; |
| private static int hasFlushed; |
| |
| // Field from OSThread |
| private static CIntegerField osThreadThreadIDField; |
| |
| 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"); |
| Type anchorType = db.lookupType("JavaFrameAnchor"); |
| |
| baseOfStackPointerField = type.getAddressField("_base_of_stack_pointer"); |
| osThreadField = type.getAddressField("_osthread"); |
| hasFlushed = db.lookupIntConstant("JavaFrameAnchor::flushed").intValue(); |
| |
| type = db.lookupType("OSThread"); |
| osThreadThreadIDField = type.getCIntegerField("_thread_id"); |
| } |
| |
| public Address getLastJavaFP(Address addr) { |
| return null; |
| |
| } |
| |
| public Address getLastJavaPC(Address addr) { |
| return null; |
| } |
| |
| public Address getBaseOfStackPointer(Address addr) { |
| return baseOfStackPointerField.getValue(addr); |
| } |
| |
| public Frame getLastFramePD(JavaThread thread, Address addr) { |
| |
| // This assert doesn't work in the debugging case for threads |
| // which are running Java code and which haven't re-entered the |
| // runtime (e.g., through a Method.invoke() or otherwise). They |
| // haven't yet "decached" their last Java stack pointer to the |
| // thread. |
| |
| // if (Assert.ASSERTS_ENABLED) { |
| // Assert.that(hasLastJavaFrame(), "must have last_Java_sp() when suspended"); |
| // // FIXME: add assertion about flushing register windows for runtime system |
| // // (not appropriate for debugging system, though, unless at safepoin t) |
| // } |
| |
| // FIXME: I don't think this is necessary, but might be useful |
| // while debugging |
| if (thread.getLastJavaSP() == null) { |
| return null; |
| } |
| |
| // sparc does a lazy window flush. The _flags field of the JavaFrameAnchor |
| // encodes whether the windows have flushed. Whenever the windows have flushed |
| // there will be a last_Java_pc. |
| // In a relective system we'd have to do something to force the thread to flush |
| // its windows and give us the pc (or the younger_sp so we can find it ourselves) |
| // In a debugger situation (process or core) the flush should have happened and |
| // so if we don't have the younger sp we can find it |
| // |
| if (thread.getLastJavaPC() != null) { |
| return new SPARCFrame(SPARCFrame.biasSP(thread.getLastJavaSP()), thread.getLastJavaPC()); |
| } else { |
| Frame top = getCurrentFrameGuess(thread, addr); |
| return new SPARCFrame(SPARCFrame.biasSP(thread.getLastJavaSP()), |
| SPARCFrame.biasSP(SPARCFrame.findYoungerSP(top.getSP(), thread.getLastJavaSP())), |
| false); |
| } |
| |
| |
| } |
| |
| public RegisterMap newRegisterMap(JavaThread thread, boolean updateMap) { |
| return new SPARCRegisterMap(thread, updateMap); |
| } |
| |
| public Frame getCurrentFrameGuess(JavaThread thread, Address addr) { |
| |
| // If java stack is walkable then both last_Java_sp and last_Java_pc are |
| // non null and we can start stack walk from this frame. |
| if (thread.getLastJavaSP() != null && thread.getLastJavaPC() != null) { |
| return new SPARCFrame(SPARCFrame.biasSP(thread.getLastJavaSP()), thread.getLastJavaPC()); |
| } |
| |
| ThreadProxy t = getThreadProxy(addr); |
| SPARCThreadContext context = (SPARCThreadContext) t.getContext(); |
| // For now, let's see what happens if we do a similar thing to |
| // what the runtime code does. I suspect this may cause us to lose |
| // the top frame from the stack. |
| Address sp = context.getRegisterAsAddress(SPARCThreadContext.R_SP); |
| Address pc = context.getRegisterAsAddress(SPARCThreadContext.R_PC); |
| |
| if ((sp == null) || (pc == null)) { |
| // Problems (have not hit this case so far, but would be bad to continue if we did) |
| return null; |
| } |
| |
| return new SPARCFrame(sp, pc); |
| } |
| |
| |
| public void printThreadIDOn(Address addr, PrintStream tty) { |
| tty.print(getThreadProxy(addr)); |
| } |
| |
| public Address getLastSP(Address addr) { |
| ThreadProxy t = getThreadProxy(addr); |
| SPARCThreadContext context = (SPARCThreadContext) t.getContext(); |
| return SPARCFrame.unBiasSP(context.getRegisterAsAddress(SPARCThreadContext.R_SP)); |
| } |
| |
| public void printInfoOn(Address threadAddr, PrintStream tty) { |
| } |
| |
| public ThreadProxy getThreadProxy(Address addr) { |
| // 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 tidAddr = osThreadAddr.addOffsetTo(osThreadThreadIDField.getOffset()); |
| |
| JVMDebugger debugger = VM.getVM().getDebugger(); |
| return debugger.getThreadForIdentifierAddress(tidAddr); |
| } |
| |
| |
| } |