73 lines
2.6 KiB
C#
73 lines
2.6 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 dnSpy.Contracts.Debugger;
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using dnSpy.Contracts.Debugger.DotNet.Evaluation;
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using dnSpy.Contracts.Debugger.Evaluation;
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using dnSpy.Debugger.DotNet.Metadata;
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namespace dnSpy.Roslyn.Debugger.Formatters {
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readonly struct ToStringFormatter {
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readonly DbgEvaluationInfo evalInfo;
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public ToStringFormatter(DbgEvaluationInfo evalInfo) => this.evalInfo = evalInfo ?? throw new ArgumentNullException(nameof(evalInfo));
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sealed class ToStringState {
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public readonly DmdMethodInfo? ToStringMethod;
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public ToStringState(DmdMethodInfo? toStringMethod) => ToStringMethod = toStringMethod;
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}
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ToStringState GetToStringState(DmdType type) {
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if (type.TryGetData(out ToStringState? state))
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return state;
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return CreateToStringState(type);
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ToStringState CreateToStringState(DmdType type2) {
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var appDomain = type2.AppDomain;
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var method = type2.GetMethod(nameof(object.ToString), DmdSignatureCallingConvention.Default | DmdSignatureCallingConvention.HasThis, 0, appDomain.System_String, Array.Empty<DmdType>(), throwOnError: false) as DmdMethodInfo;
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if (method is not null) {
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if (method.DeclaringType == appDomain.System_Object || method.DeclaringType == appDomain.System_ValueType || method.DeclaringType == appDomain.System_Enum)
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method = null;
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}
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return type2.GetOrCreateData(() => new ToStringState(method));
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}
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}
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public string? GetToStringValue(DbgDotNetValue value) {
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if (value.IsNull)
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return null;
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var state = GetToStringState(value.Type);
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if (state.ToStringMethod is null)
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return null;
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var runtime = evalInfo.Runtime.GetDotNetRuntime();
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var res = runtime.Call(evalInfo, value, state.ToStringMethod, Array.Empty<object>(), DbgDotNetInvokeOptions.None);
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if (res.HasError || res.ValueIsException)
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return null;
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var rawValue = res.Value!.GetRawValue();
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if (!rawValue.HasRawValue)
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return null;
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return rawValue.RawValue as string;
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}
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}
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}
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