crashanalysercmd/PerfToolsSharedLibraries/Engine/SymbianSymbolLib/Relocator/SymbolRelocator.cs
/*
* Copyright (c) 2004-2008 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description:
*
*/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using SymbianUtils;
using SymbianUtils.Range;
using SymbianUtils.Tracer;
using SymbianUtils.FileTypes;
using SymbianStructuresLib.Debug.Symbols;
using SymbianStructuresLib.CodeSegments;
using SymbianSymbolLib.DbgEnginePlugin;
using SymbianSymbolLib.SourceManagement.Source;
using SymbianSymbolLib.QueryAPI;
namespace SymbianSymbolLib.Relocator
{
internal class SymbolRelocator : IEnumerable<SymSourceAndCollection>
{
#region Constructors
public SymbolRelocator( SymbolPlugin aPlugin )
{
iPlugin = aPlugin;
}
#endregion
#region API
public SymbolCollection Activate( CodeSegDefinition aCodeSegment )
{
SymbolCollection ret = null;
// Find the corresponding code seg
SymSourceAndCollection pair = SourceManager[ aCodeSegment ];
if ( pair != null )
{
SymbolCollection col = pair.Collection;
lock ( col.SyncRoot )
{
if ( col.IsFixed )
{
// Cannot activate a fixed code segment - TODO: should this return "true", i.e. already activated?
}
else
{
bool safe = CheckSafeToActivate( aCodeSegment );
if ( safe )
{
// Deep copy the collection
SymbolCollection dupe = SymbolCollection.NewCopy( iPlugin.ProvisioningManager.IdAllocator, col );
// Set new process-specific relocated base address
dupe.Relocate( aCodeSegment.Base );
// Save so that we can unload it later
pair = new SymSourceAndCollection( pair, dupe );
AddToActivationList( pair, aCodeSegment );
// We managed to activate a binary, so return the collection
ret = dupe;
iPlugin.Trace( "[S] ACTIVATE - {0}", aCodeSegment );
}
}
}
}
//
return ret;
}
public bool Deactivate( CodeSegDefinition aCodeSegment )
{
bool activated = iActivationLUT.ContainsKey( aCodeSegment );
if ( activated )
{
SymSourceAndCollection pair = iActivationLUT[ aCodeSegment ];
//
lock ( iActivatedCollections )
{
iActivatedCollections.Remove( pair.Collection );
}
lock ( iActivationLUT )
{
iActivationLUT.Remove( aCodeSegment );
}
//
iPlugin.Trace( "[S] DEACTIVATE - {0} @ {1}", pair.Collection.FileName, aCodeSegment );
}
//
return activated;
}
#endregion
#region Properties
public SymbolCollectionList CollectionList
{
get { return iActivatedCollections; }
}
public int Count
{
get
{
lock ( iActivatedCollections )
{
lock ( iActivationLUT )
{
System.Diagnostics.Debug.Assert( iActivatedCollections.Count == iActivationLUT.Count );
return iActivationLUT.Count;
}
}
}
}
#endregion
#region Internal methods
internal SymbolPlugin Plugin
{
get { return iPlugin; }
}
internal SymSourceManager SourceManager
{
get { return Plugin.SourceManager; }
}
private void AddToActivationList( SymSourceAndCollection aEntry, CodeSegDefinition aCodeSegment )
{
lock ( iActivatedCollections )
{
iActivatedCollections.AddAndBuildCache( aEntry.Collection );
}
lock ( iActivationLUT )
{
iActivationLUT.Add( aCodeSegment, aEntry );
}
}
private bool CheckSafeToActivate( CodeSegDefinition aCodeSegment )
{
lock ( iActivationLUT )
{
bool alreadyExists = iActivationLUT.ContainsKey( aCodeSegment );
if ( alreadyExists )
{
// Specified code segment already activated
return false;
}
else
{
// We must check that there's no overlap in activation ranges between code segments.
foreach ( KeyValuePair<CodeSegDefinition, SymSourceAndCollection> kvp in iActivationLUT )
{
AddressRange range = kvp.Key;
if ( range.Contains( aCodeSegment ) )
{
// Overlaps with existing activated code segment
return false;
}
}
}
//
return true;
}
}
#endregion
#region From IEnumerable<SymSourceAndCollection>
public IEnumerator<SymSourceAndCollection> GetEnumerator()
{
foreach ( KeyValuePair<CodeSegDefinition, SymSourceAndCollection> kvp in iActivationLUT )
{
yield return kvp.Value;
}
}
System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
{
foreach ( KeyValuePair<CodeSegDefinition, SymSourceAndCollection> kvp in iActivationLUT )
{
yield return kvp.Value;
}
}
#endregion
#region Data members
private readonly SymbolPlugin iPlugin;
private SymbolCollectionList iActivatedCollections = new SymbolCollectionList();
private Dictionary<CodeSegDefinition, SymSourceAndCollection> iActivationLUT = new Dictionary<CodeSegDefinition, SymSourceAndCollection>();
#endregion
}
}