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/*******************************************************************************
* Copyright (c) 2004, 2009 QNX Software Systems and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* QNX Software Systems - Initial API and implementation
* oyvind.harboe@zylin.com - http://bugs.eclipse.org/250638
*******************************************************************************/
package org.eclipse.cdt.debug.internal.core.model;
import java.math.BigInteger;
import java.util.ArrayList;
import org.eclipse.cdt.core.IAddress;
import org.eclipse.cdt.core.IAddressFactory;
import org.eclipse.cdt.debug.core.CDebugCorePlugin;
import org.eclipse.cdt.debug.core.ICDebugConstants;
import org.eclipse.cdt.debug.core.cdi.CDIException;
import org.eclipse.cdt.debug.core.cdi.event.ICDIEvent;
import org.eclipse.cdt.debug.core.cdi.event.ICDIEventListener;
import org.eclipse.cdt.debug.core.cdi.event.ICDIMemoryChangedEvent;
import org.eclipse.cdt.debug.core.cdi.model.ICDIInstruction;
import org.eclipse.cdt.debug.core.cdi.model.ICDIMixedInstruction;
import org.eclipse.cdt.debug.core.cdi.model.ICDITarget;
import org.eclipse.cdt.debug.core.model.ICStackFrame;
import org.eclipse.cdt.debug.core.model.IDisassembly;
import org.eclipse.cdt.debug.core.model.IDisassemblyBlock;
import org.eclipse.cdt.debug.core.model.IExecFileInfo;
import org.eclipse.debug.core.DebugEvent;
import org.eclipse.debug.core.DebugException;
/**
* CDI implementation of IDisassembly
*/
public class Disassembly extends CDebugElement implements IDisassembly, ICDIEventListener {
final static private int DISASSEMBLY_BLOCK_SIZE = 100;
private DisassemblyBlock[] fBlocks = new DisassemblyBlock[1];
/**
* Constructor for Disassembly.
*
* @param target
*/
public Disassembly( CDebugTarget target ) {
super( target );
getCDISession().getEventManager().addEventListener( this );
}
/* (non-Javadoc)
* @see org.eclipse.cdt.debug.core.model.IDisassembly#getDisassemblyBlock(org.eclipse.cdt.debug.core.model.ICStackFrame)
*/
@Override
public IDisassemblyBlock getDisassemblyBlock( ICStackFrame frame ) throws DebugException {
if ( fBlocks[0] == null || !fBlocks[0].contains( frame ) ) {
fBlocks[0] = createBlock( frame );
}
return fBlocks[0];
}
private DisassemblyBlock createBlock( ICStackFrame frame ) throws DebugException {
ICDITarget target = (ICDITarget)getDebugTarget().getAdapter( ICDITarget.class );
if ( target != null ) {
String fileName = frame.getFile();
int lineNumber = frame.getLineNumber();
ICDIMixedInstruction[] mixedInstrs = new ICDIMixedInstruction[0];
IAddress address = frame.getAddress();
if (address==null)
return null;
if ( fileName != null && fileName.length() > 0 ) {
try {
mixedInstrs = target.getMixedInstructions( fileName,
lineNumber,
CDebugCorePlugin.getDefault().getPluginPreferences().getInt( ICDebugConstants.PREF_MAX_NUMBER_OF_INSTRUCTIONS ) );
}
catch( CDIException e ) {
// ignore and try to get disassembly without source
}
}
// Double check if debugger returns correct address range.
if ( mixedInstrs.length == 0 ||
!containsAddress( mixedInstrs, address ) ) {
try {
BigInteger addr = new BigInteger( address.toString() );
ICDIInstruction[] instructions = getFunctionInstructions( target.getInstructions( addr, addr.add( BigInteger.valueOf( DISASSEMBLY_BLOCK_SIZE ) ) ) );
return DisassemblyBlock.create( this, instructions );
}
catch( CDIException e ) {
targetRequestFailed( e.getMessage(), e );
}
}
else {
return DisassemblyBlock.create( this, mixedInstrs );
}
}
return null;
}
@Override
public IDisassemblyBlock getDisassemblyBlock( IAddress address ) throws DebugException {
fBlocks[0] = createBlock( address, null);
return fBlocks[0];
}
public IDisassemblyBlock getDisassemblyBlock( IAddress startAddress, IAddress endAddress ) throws DebugException {
fBlocks[0] = createBlock( startAddress, endAddress );
return fBlocks[0];
}
private DisassemblyBlock createBlock( IAddress startAddress, IAddress endAddress) throws DebugException {
ICDITarget target = (ICDITarget)getDebugTarget().getAdapter( ICDITarget.class );
if ( target != null ) {
ICDIMixedInstruction[] mixedInstrs = new ICDIMixedInstruction[0];
if ( mixedInstrs.length == 0 ||
!containsAddress( mixedInstrs, startAddress ) ) {
try {
BigInteger startAddr = new BigInteger( startAddress.toString() );
BigInteger endAddr = null;
if (endAddress != null) {
endAddr = new BigInteger( endAddress.toString() );
} else {
endAddr = startAddr.add( BigInteger.valueOf(
CDebugCorePlugin.getDefault().getPluginPreferences().getInt(ICDebugConstants.PREF_MAX_NUMBER_OF_INSTRUCTIONS)));
}
mixedInstrs = target.getMixedInstructions( startAddr, endAddr);
return DisassemblyBlock.create( this, mixedInstrs );
}
catch( CDIException e ) {
targetRequestFailed( e.getMessage(), e );
}
}
else {
return DisassemblyBlock.create( this, mixedInstrs );
}
}
return null;
}
private boolean containsAddress( ICDIMixedInstruction[] mi, IAddress address ) {
for( int i = 0; i < mi.length; ++i ) {
ICDIInstruction[] instructions = mi[i].getInstructions();
for ( int j = 0; j < instructions.length; ++j ) {
if ( address.getValue().equals( instructions[j].getAdress() ) )
return true;
}
}
return false;
}
private ICDIInstruction[] getFunctionInstructions( ICDIInstruction[] rawInstructions ) {
if ( rawInstructions.length > 0 && rawInstructions[0].getFuntionName() != null && rawInstructions[0].getFuntionName().length() > 0 ) {
ArrayList list = new ArrayList( rawInstructions.length );
list.add( rawInstructions[0] );
for( int i = 1; i < rawInstructions.length; ++i ) {
if ( rawInstructions[0].getFuntionName().equals( rawInstructions[i].getFuntionName() ) ) {
list.add( rawInstructions[i] );
}
}
return (ICDIInstruction[])list.toArray( new ICDIInstruction[list.size()] );
}
return rawInstructions;
}
public void dispose() {
getCDISession().getEventManager().removeEventListener( this );
CDebugCorePlugin.getDefault().getDisassemblyContextService().unregister( this );
for ( int i = 0; i < fBlocks.length; ++i )
if ( fBlocks[i] != null ) {
fBlocks[i].dispose();
fBlocks[i] = null;
}
}
/* (non-Javadoc)
* @see org.eclipse.core.runtime.IAdaptable#getAdapter(java.lang.Class)
*/
@Override
public Object getAdapter( Class adapter ) {
if ( IExecFileInfo.class.equals( adapter ) )
return getDebugTarget().getAdapter( adapter );
return super.getAdapter( adapter );
}
public void reset() {
for ( int i = 0; i < fBlocks.length; ++i )
if ( fBlocks[i] != null ) {
fBlocks[i].dispose();
fBlocks[i] = null;
}
fireChangeEvent( DebugEvent.CONTENT );
}
/* (non-Javadoc)
* @see org.eclipse.cdt.debug.core.model.IDisassembly#getAddressFactory()
*/
@Override
public IAddressFactory getAddressFactory() {
return ((CDebugTarget)getDebugTarget()).getAddressFactory();
}
/* (non-Javadoc)
* @see org.eclipse.cdt.debug.core.cdi.event.ICDIEventListener#handleDebugEvents(org.eclipse.cdt.debug.core.cdi.event.ICDIEvent[])
*/
@Override
public void handleDebugEvents( ICDIEvent[] events ) {
boolean update = false;
for ( int i = 0; i < events.length; ++i ) {
if ( events[i] instanceof ICDIMemoryChangedEvent ) {
BigInteger[] addresses = ((ICDIMemoryChangedEvent)events[i]).getAddresses();
for ( int j = 0; j < addresses.length; ++j ) {
IAddress address = getAddressFactory().createAddress( addresses[j] );
for ( int k = 0; k < fBlocks.length; ++k ) {
if ( fBlocks[k] != null && fBlocks[k].contains( address ) ) {
update = true;
break;
}
}
}
}
}
if ( update )
reset();
}
}
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