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view agent/src/share/classes/sun/jvm/hotspot/runtime/solaris_sparc/SolarisSPARCJavaThreadPDAccess.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | a5838065ab24 |
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/* * Copyright 2000-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.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) { 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); } }