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2021-09-20 18:20:01 +02:00
/*
Copyright (C) 2014-2019 de4dot@gmail.com
This file is part of dnSpy
dnSpy is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
dnSpy is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
*/
using System;
using System.Globalization;
using System.Linq;
using dnSpy.Contracts.Debugger;
using dnSpy.Contracts.Debugger.DotNet.Evaluation;
using dnSpy.Contracts.Debugger.DotNet.Evaluation.ValueNodes;
using dnSpy.Contracts.Debugger.Engine.Evaluation;
using dnSpy.Contracts.Debugger.Evaluation;
using dnSpy.Contracts.Debugger.Text;
using dnSpy.Debugger.DotNet.Metadata;
namespace dnSpy.Debugger.DotNet.Evaluation.Engine {
sealed class DbgEngineValueNodeImpl : DbgEngineValueNode {
public override string? ErrorMessage => dnValueNode.ErrorMessage;
public override DbgEngineValue? Value => value;
public override string Expression => dnValueNode.Expression;
public override string ImageName => dnValueNode.ImageName;
public override bool IsReadOnly => value is null || dnValueNode.IsReadOnly;
public override bool CausesSideEffects => dnValueNode.CausesSideEffects;
public override bool? HasChildren => dnValueNode.HasChildren;
readonly DbgDotNetEngineValueNodeFactoryImpl owner;
readonly DbgDotNetValueNode dnValueNode;
readonly DbgEngineValueImpl? value;
public DbgEngineValueNodeImpl(DbgDotNetEngineValueNodeFactoryImpl owner, DbgDotNetValueNode dnValueNode) {
if (dnValueNode is null)
throw new ArgumentNullException(nameof(dnValueNode));
this.owner = owner ?? throw new ArgumentNullException(nameof(owner));
var dnValue = dnValueNode.Value;
value = dnValue is null ? null : new DbgEngineValueImpl(dnValue);
this.dnValueNode = dnValueNode;
}
public override ulong GetChildCount(DbgEvaluationInfo evalInfo) {
var dispatcher = evalInfo.Runtime.GetDotNetRuntime().Dispatcher;
if (dispatcher.CheckAccess())
return GetChildCountCore(evalInfo);
return GetChildCount(dispatcher, evalInfo);
ulong GetChildCount(DbgDotNetDispatcher dispatcher2, DbgEvaluationInfo evalInfo2) {
if (!dispatcher2.TryInvokeRethrow(() => GetChildCountCore(evalInfo2), out var result))
result = 0;
return result;
}
}
ulong GetChildCountCore(DbgEvaluationInfo evalInfo) =>
dnValueNode.GetChildCount(evalInfo);
public override DbgEngineValueNode[] GetChildren(DbgEvaluationInfo evalInfo, ulong index, int count, DbgValueNodeEvaluationOptions options) {
var dispatcher = evalInfo.Runtime.GetDotNetRuntime().Dispatcher;
if (dispatcher.CheckAccess())
return GetChildrenCore(evalInfo, index, count, options);
return GetChildren(dispatcher, evalInfo, index, count, options);
DbgEngineValueNode[] GetChildren(DbgDotNetDispatcher dispatcher2, DbgEvaluationInfo evalInfo2, ulong index2, int count2, DbgValueNodeEvaluationOptions options2) {
if (!dispatcher2.TryInvokeRethrow(() => GetChildrenCore(evalInfo2, index2, count2, options2), out var result))
result = Array.Empty<DbgEngineValueNode>();
return result;
}
}
DbgEngineValueNode[] GetChildrenCore(DbgEvaluationInfo evalInfo, ulong index, int count, DbgValueNodeEvaluationOptions options) {
DbgEngineValueNode[]? res = null;
DbgDotNetValueNode[]? dnNodes = null;
try {
dnNodes = dnValueNode.GetChildren(evalInfo, index, count, options);
res = new DbgEngineValueNode[dnNodes.Length];
for (int i = 0; i < res.Length; i++) {
evalInfo.CancellationToken.ThrowIfCancellationRequested();
res[i] = owner.Create(dnNodes[i]);
}
}
catch (Exception ex) {
if (res is not null)
evalInfo.Runtime.Process.DbgManager.Close(res.Where(a => a is not null));
if (dnNodes is not null)
evalInfo.Runtime.Process.DbgManager.Close(dnNodes);
if (!ExceptionUtils.IsInternalDebuggerError(ex))
throw;
res = new DbgEngineValueNode[count];
for (int i = 0; i < res.Length; i++)
res[i] = owner.CreateError(evalInfo, DbgDotNetEngineValueNodeFactoryExtensions.errorName, PredefinedEvaluationErrorMessages.InternalDebuggerError, "<expression>", false);
return res;
}
return res;
}
public override void Format(DbgEvaluationInfo evalInfo, IDbgValueNodeFormatParameters options, CultureInfo? cultureInfo) {
var dispatcher = evalInfo.Runtime.GetDotNetRuntime().Dispatcher;
if (dispatcher.CheckAccess())
FormatCore(evalInfo, options, cultureInfo);
else
Format2(dispatcher, evalInfo, options, cultureInfo);
void Format2(DbgDotNetDispatcher dispatcher2, DbgEvaluationInfo evalInfo2, IDbgValueNodeFormatParameters options2, CultureInfo? cultureInfo2) =>
dispatcher2.TryInvokeRethrow(() => FormatCore(evalInfo2, options2, cultureInfo2));
}
void FormatCore(DbgEvaluationInfo evalInfo, IDbgValueNodeFormatParameters options, CultureInfo? cultureInfo) {
evalInfo.Runtime.GetDotNetRuntime().Dispatcher.VerifyAccess();
DbgValueFormatterOptions formatterOptions;
DbgValueFormatterTypeOptions typeFormatterOptions;
var formatter = owner.Formatter;
var dnValue = value?.DotNetValue;
if (options.NameOutput is not null) {
formatterOptions = PredefinedFormatSpecifiers.GetValueFormatterOptions(dnValueNode.FormatSpecifiers, options.NameFormatterOptions);
if (dnValueNode.FormatName(evalInfo, options.NameOutput, formatter, formatterOptions, cultureInfo)) {
// Nothing
}
else
dnValueNode.Name.WriteTo(options.NameOutput);
evalInfo.CancellationToken.ThrowIfCancellationRequested();
}
if (options.ExpectedTypeOutput is not null) {
formatterOptions = PredefinedFormatSpecifiers.GetValueFormatterOptions(dnValueNode.FormatSpecifiers, options.TypeFormatterOptions);
typeFormatterOptions = PredefinedFormatSpecifiers.GetValueFormatterTypeOptions(dnValueNode.FormatSpecifiers, options.ExpectedTypeFormatterOptions);
if (dnValueNode.FormatExpectedType(evalInfo, options.ExpectedTypeOutput, formatter, typeFormatterOptions, formatterOptions, cultureInfo)) {
// Nothing
}
else if (dnValueNode.ExpectedType is DmdType expectedType)
formatter.FormatType(evalInfo, options.ExpectedTypeOutput, expectedType, null, typeFormatterOptions, cultureInfo);
evalInfo.CancellationToken.ThrowIfCancellationRequested();
}
if (options.ActualTypeOutput is not null) {
formatterOptions = PredefinedFormatSpecifiers.GetValueFormatterOptions(dnValueNode.FormatSpecifiers, options.TypeFormatterOptions);
typeFormatterOptions = PredefinedFormatSpecifiers.GetValueFormatterTypeOptions(dnValueNode.FormatSpecifiers, options.ActualTypeFormatterOptions);
if (dnValueNode.FormatActualType(evalInfo, options.ActualTypeOutput, formatter, typeFormatterOptions, formatterOptions, cultureInfo)) {
// Nothing
}
else if (dnValueNode.ActualType is DmdType actualType)
formatter.FormatType(evalInfo, options.ActualTypeOutput, actualType, dnValue, typeFormatterOptions, cultureInfo);
evalInfo.CancellationToken.ThrowIfCancellationRequested();
}
if (options.ValueOutput is not null) {
formatterOptions = PredefinedFormatSpecifiers.GetValueFormatterOptions(dnValueNode.FormatSpecifiers, options.ValueFormatterOptions);
if (dnValueNode.FormatValue(evalInfo, options.ValueOutput, formatter, formatterOptions, cultureInfo)) {
// Nothing
}
else if (dnValue is not null)
formatter.FormatValue(evalInfo, options.ValueOutput, dnValue, formatterOptions, cultureInfo);
else if (ErrorMessage is string errorMessage)
options.ValueOutput.Write(DbgTextColor.Error, owner.ErrorMessagesHelper.GetErrorMessage(errorMessage));
evalInfo.CancellationToken.ThrowIfCancellationRequested();
}
}
public override DbgEngineValueNodeAssignmentResult Assign(DbgEvaluationInfo evalInfo, string expression, DbgEvaluationOptions options) {
var dispatcher = evalInfo.Runtime.GetDotNetRuntime().Dispatcher;
if (dispatcher.CheckAccess())
return AssignCore(evalInfo, expression, options);
return Assign(dispatcher, evalInfo, expression, options);
DbgEngineValueNodeAssignmentResult Assign(DbgDotNetDispatcher dispatcher2, DbgEvaluationInfo evalInfo2, string expression2, DbgEvaluationOptions options2) {
if (!dispatcher2.TryInvokeRethrow(() => AssignCore(evalInfo2, expression2, options2), out var result))
result = new DbgEngineValueNodeAssignmentResult(DbgEEAssignmentResultFlags.None, DispatcherConstants.ProcessExitedError);
return result;
}
}
DbgEngineValueNodeAssignmentResult AssignCore(DbgEvaluationInfo evalInfo, string expression, DbgEvaluationOptions options) {
try {
var ee = evalInfo.Context.Language.ExpressionEvaluator;
var res = ee.Assign(evalInfo, Expression, expression, options);
return new DbgEngineValueNodeAssignmentResult(res.Flags, res.Error);
}
catch (Exception ex) when (ExceptionUtils.IsInternalDebuggerError(ex)) {
return new DbgEngineValueNodeAssignmentResult(DbgEEAssignmentResultFlags.None, PredefinedEvaluationErrorMessages.InternalDebuggerError);
}
}
protected override void CloseCore(DbgDispatcher dispatcher) {
dnValueNode.Close(dispatcher);
Value?.Close(dispatcher);
}
}
}