// Licensed to the .NET Foundation under one or more agreements. // The .NET Foundation licenses this file to you under the MIT license. // See the LICENSE file in the project root for more information. using System; using System.Reflection; using System.Runtime.InteropServices; namespace System.Reflection.Emit { public sealed class LocalBuilder : LocalVariableInfo { #region Private Data Members private int m_localIndex; private Type m_localType; private MethodInfo m_methodBuilder; private bool m_isPinned; #endregion #region Constructor private LocalBuilder() { } internal LocalBuilder(int localIndex, Type localType, MethodInfo methodBuilder) : this(localIndex, localType, methodBuilder, false) { } internal LocalBuilder(int localIndex, Type localType, MethodInfo methodBuilder, bool isPinned) { m_isPinned = isPinned; m_localIndex = localIndex; m_localType = localType; m_methodBuilder = methodBuilder; } #endregion #region Internal Members internal int GetLocalIndex() { return m_localIndex; } internal MethodInfo GetMethodBuilder() { return m_methodBuilder; } #endregion #region LocalVariableInfo Override public override bool IsPinned { get { return m_isPinned; } } public override Type LocalType { get { return m_localType; } } public override int LocalIndex { get { return m_localIndex; } } #endregion #region Public Members public void SetLocalSymInfo(String name) { SetLocalSymInfo(name, 0, 0); } public void SetLocalSymInfo(String name, int startOffset, int endOffset) { ModuleBuilder dynMod; SignatureHelper sigHelp; int sigLength; byte[] signature; byte[] mungedSig; int index; MethodBuilder methodBuilder = m_methodBuilder as MethodBuilder; if (methodBuilder == null) // it's a light code gen entity throw new NotSupportedException(); dynMod = (ModuleBuilder)methodBuilder.Module; if (methodBuilder.IsTypeCreated()) { // cannot change method after its containing type has been created throw new InvalidOperationException(SR.InvalidOperation_TypeHasBeenCreated); } // set the name and range of offset for the local if (dynMod.GetSymWriter() == null) { // cannot set local name if not debug module throw new InvalidOperationException(SR.InvalidOperation_NotADebugModule); } sigHelp = SignatureHelper.GetFieldSigHelper(dynMod); sigHelp.AddArgument(m_localType); signature = sigHelp.InternalGetSignature(out sigLength); // The symbol store doesn't want the calling convention on the // front of the signature, but InternalGetSignature returns // the callinging convention. So we strip it off. This is a // bit unfortunate, since it means that we need to allocate // yet another array of bytes... mungedSig = new byte[sigLength - 1]; Buffer.BlockCopy(signature, 1, mungedSig, 0, sigLength - 1); index = methodBuilder.GetILGenerator().m_ScopeTree.GetCurrentActiveScopeIndex(); if (index == -1) { // top level scope information is kept with methodBuilder methodBuilder.m_localSymInfo.AddLocalSymInfo( name, mungedSig, m_localIndex, startOffset, endOffset); } else { methodBuilder.GetILGenerator().m_ScopeTree.AddLocalSymInfoToCurrentScope( name, mungedSig, m_localIndex, startOffset, endOffset); } } #endregion } }