crashanalysercmd/PerfToolsSharedLibraries/Engine/SymbianStackLib/Plugins/Accurate/Instructions/Types/AccInstBranch.cs
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/crashanalysercmd/PerfToolsSharedLibraries/Engine/SymbianStackLib/Plugins/Accurate/Instructions/Types/AccInstBranch.cs Thu Feb 11 15:50:58 2010 +0200
@@ -0,0 +1,103 @@
+/*
+* Copyright (c) 2009 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.BasicTypes;
+using SymbianStructuresLib.Arm;
+using SymbianStructuresLib.Arm.Instructions;
+using SymbianStructuresLib.Arm.Registers;
+using SymbianInstructionLib.Arm.Instructions.Common;
+using SymbianInstructionLib.Arm.Instructions.Arm;
+using SymbianInstructionLib.Arm.Instructions.Arm.DataProcessing;
+using SymbianInstructionLib.Arm.Instructions.Thumb;
+using SymbianInstructionLib.Arm.Instructions.Thumb.DataProcessing;
+using SymbianStackAlgorithmAccurate.CPU;
+using SymbianStackAlgorithmAccurate.Prologue;
+
+namespace SymbianStackAlgorithmAccurate.Instructions.Types
+{
+ internal class AccInstBranch : AccInstruction
+ {
+ #region Constructors
+ public AccInstBranch( IArmInstruction aInstruction )
+ : base( aInstruction )
+ {
+ System.Diagnostics.Debug.Assert( base.Instruction.AIGroup == TArmInstructionGroup.EGroupBranch );
+ }
+ #endregion
+
+ #region API
+ internal override void Process( ArmPrologueHelper aProlog )
+ {
+ }
+
+ internal override void Prefilter( AccInstructionList aInstructions, int aMyIndex, int aInstructionCountOffsetToPC )
+ {
+ if ( this.Ignored == false )
+ {
+ int count = aInstructions.Count;
+ //
+ if ( base.Instruction.AIConditionCode == TArmInstructionCondition.AL )
+ {
+ // As soon as we see any unconditional branch statement we can be sure that we are past the Prologue.
+ for ( int i = aMyIndex + 1; i < count; i++ )
+ {
+ aInstructions[ i ].Ignored = true;
+ }
+ }
+ else
+ {
+ // Count the number of interesting instructions before the conditional branch
+ int interestingInstructionCount = 0;
+ for ( int i = 0; i < aMyIndex; i++ )
+ {
+ AccInstruction accInstruction = aInstructions[ i ];
+ IArmInstruction inst = accInstruction.Instruction;
+ //
+ bool involvesSP = inst.QueryInvolvement( TArmRegisterType.EArmReg_SP );
+ if ( involvesSP )
+ {
+ ++interestingInstructionCount;
+ }
+ }
+
+ // If we have seen at least one interesting instruction then assume prologue is complete.
+ if ( interestingInstructionCount >= 1 )
+ {
+ for ( int i = aMyIndex; i < count; i++ )
+ {
+ aInstructions[ i ].Ignored = true;
+ }
+ }
+ }
+ }
+ }
+ #endregion
+
+ #region Properties
+ #endregion
+
+ #region Internal methods
+ #endregion
+
+ #region Data members
+ #endregion
+ }
+}
+