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/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Microsoft Public License. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Microsoft Public License, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Microsoft Public License.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System;
using System.Linq.Expressions;
using System.Reflection;
using System.Runtime.CompilerServices;
using Microsoft.Scripting.Runtime;
using System.Threading;
namespace Microsoft.Scripting.Interpreter {
public class LastFaultingLineExpression : Expression {
private readonly Expression _lineNumberExpression;
public LastFaultingLineExpression(Expression lineNumberExpression) {
_lineNumberExpression = lineNumberExpression;
}
public sealed override ExpressionType NodeType {
get { return ExpressionType.Extension; }
}
public sealed override Type Type {
get { return typeof(int); }
}
public override bool CanReduce {
get {
return true;
}
}
public override Expression/*!*/ Reduce() {
return _lineNumberExpression;
}
protected override Expression VisitChildren(ExpressionVisitor visitor) {
Expression lineNo = visitor.Visit(_lineNumberExpression);
if (lineNo != _lineNumberExpression) {
return new LastFaultingLineExpression(lineNo);
}
return this;
}
}
class UpdateStackTraceInstruction : Instruction {
internal DebugInfo[] _debugInfos;
public override int ProducedStack {
get {
return 1;
}
}
public override int Run(InterpretedFrame frame) {
DebugInfo info = DebugInfo.GetMatchingDebugInfo(_debugInfos, frame.FaultingInstruction);
if (info != null && !info.IsClear) {
frame.Push(info.StartLine);
}else{
frame.Push(-1);
}
return +1;
}
}
}
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