Mercurial > hg > truffle
diff 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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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/runtime/solaris_sparc/SolarisSPARCJavaThreadPDAccess.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,166 @@ +/* + * 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); + } + + +}