100 lines
3.4 KiB
C#
100 lines
3.4 KiB
C#
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/*
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Copyright (C) 2014-2019 de4dot@gmail.com
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This file is part of dnSpy
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dnSpy is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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dnSpy is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.Diagnostics;
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using dnlib.DotNet;
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using dnSpy.Contracts.Debugger;
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using dnSpy.Contracts.Decompiler;
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using dnSpy.Debugger.DotNet.Metadata;
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namespace dnSpy.Debugger.DotNet.Steppers.Engine {
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static class CompilerUtils {
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public static bool IsIgnoredIteratorStateMachineMethod(MethodDef method) {
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var declType = method.DeclaringType;
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if (declType.DeclaringType is null)
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return false;
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if (!declType.IsDefined(utf8System_Runtime_CompilerServices, utf8CompilerGeneratedAttribute))
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return false;
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bool result = false;
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foreach (var ii in declType.Interfaces) {
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if (ii.Interface.FullName == "System.Collections.IEnumerator") {
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result = true;
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break;
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}
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}
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if (!result)
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return false;
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if (method.IsVirtual) {
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// Ignore everything except MoveNext
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if (method.Name == utf8MoveNext)
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return false;
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foreach (var ovr in method.Overrides) {
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if (ovr.MethodDeclaration.Name == utf8MoveNext)
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return false;
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}
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}
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return true;
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}
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static readonly UTF8String utf8MoveNext = new UTF8String("MoveNext");
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static readonly UTF8String utf8System_Runtime_CompilerServices = new UTF8String("System.Runtime.CompilerServices");
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static readonly UTF8String utf8CompilerGeneratedAttribute = new UTF8String("CompilerGeneratedAttribute");
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// The compiler adds a new instance method to the class if a base member is accessed using 'base.XXX'
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// from inside an iterator or async method. That method just calls the real base method.
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public static bool IsBaseWrapperMethod(DbgModule module, uint token) {
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var reflectionModule = module.GetReflectionModule();
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Debug2.Assert(reflectionModule is not null);
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if (reflectionModule is null)
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return false;
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var method = reflectionModule.ResolveMethod((int)token, DmdResolveOptions.None);
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Debug2.Assert(method is not null);
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if (method is null)
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return false;
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if (!method.IsPrivate || method.IsStatic || method.IsAbstract || method.IsVirtual)
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return false;
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var name = method.Name;
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if (string.IsNullOrEmpty(name))
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return false;
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bool okName = false;
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var c = name[0];
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if (c == '<') {
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// Roslyn C#, eg. "<>n__2"
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if (name.StartsWith("<>n__", StringComparison.Ordinal))
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okName = true;
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// mcs, eg. "<GetString>__BaseCallProxy1"
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else if (name.IndexOf(">__BaseCallProxy", StringComparison.Ordinal) >= 0)
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okName = true;
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}
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// VB, eg. "$VB$ClosureStub_GetString_MyBase"
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else if (c == '$' && name.StartsWith("$VB$ClosureStub_", StringComparison.Ordinal) && name.EndsWith("_MyBase", StringComparison.Ordinal))
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okName = true;
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if (!okName)
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return false;
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return method.IsDefined("System.Runtime.CompilerServices.CompilerGeneratedAttribute", inherit: false);
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}
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}
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}
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