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package sun.jvm.hotspot.runtime.solaris_x86;

import java.io.*;
import java.util.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.debugger.x86.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.runtime.x86.*;
import sun.jvm.hotspot.types.*;
import sun.jvm.hotspot.utilities.*;

Placeholder for now to allow us to start the SA without support for stack traces
/** Placeholder for now to allow us to start the SA without support for stack traces */
public class SolarisX86JavaThreadPDAccess implements JavaThreadPDAccess { private static AddressField lastJavaFPField; private static AddressField osThreadField; private static AddressField baseOfStackPointerField; // Field from OSThread private static CIntegerField osThreadThreadIDField; // This is currently unneeded but is being kept in case we change // the currentFrameGuess algorithm private static final long GUESS_SCAN_RANGE = 128 * 1024; 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"); lastJavaFPField = anchorType.getAddressField("_last_Java_fp"); osThreadField = type.getAddressField("_osthread"); type = db.lookupType("OSThread"); osThreadThreadIDField = type.getCIntegerField("_thread_id"); } public Address getLastJavaFP(Address addr) { return lastJavaFPField.getValue(addr.addOffsetTo(sun.jvm.hotspot.runtime.JavaThread.getAnchorField().getOffset())); } public Address getLastJavaPC(Address addr) { return null; } public Address getBaseOfStackPointer(Address addr) { return null; } public Frame getLastFramePD(JavaThread thread, Address addr) { Address fp = thread.getLastJavaFP(); if (fp == null) { return null; // no information } Address pc = thread.getLastJavaPC(); if ( pc != null ) { return new X86Frame(thread.getLastJavaSP(), fp, pc); } else { return new X86Frame(thread.getLastJavaSP(), fp); } } public RegisterMap newRegisterMap(JavaThread thread, boolean updateMap) { return new X86RegisterMap(thread, updateMap); } public Frame getCurrentFrameGuess(JavaThread thread, Address addr) { ThreadProxy t = getThreadProxy(addr); X86ThreadContext context = (X86ThreadContext) t.getContext(); X86CurrentFrameGuess guesser = new X86CurrentFrameGuess(context, thread); if (!guesser.run(GUESS_SCAN_RANGE)) { return null; } if (guesser.getPC() == null) { return new X86Frame(guesser.getSP(), guesser.getFP()); } else { return new X86Frame(guesser.getSP(), guesser.getFP(), guesser.getPC()); } } public void printThreadIDOn(Address addr, PrintStream tty) { tty.print(getThreadProxy(addr)); } public void printInfoOn(Address threadAddr, PrintStream tty) { } public Address getLastSP(Address addr) { ThreadProxy t = getThreadProxy(addr); X86ThreadContext context = (X86ThreadContext) t.getContext(); return context.getRegisterAsAddress(X86ThreadContext.ESP); } 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); } }