87 lines
2.7 KiB
C#
87 lines
2.7 KiB
C#
/*
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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.ComponentModel.Composition;
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using System.Diagnostics;
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using System.IO;
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using Microsoft.Diagnostics.Runtime;
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namespace dnSpy.Debugger.DotNet.CorDebug.DAC {
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abstract class ClrDacProvider {
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public abstract ClrDac Create(int pid, string clrPath, IClrDacDebugger clrDacDebugger);
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}
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[Export(typeof(ClrDacProvider))]
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sealed class ClrDacProviderImpl : ClrDacProvider {
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public override ClrDac Create(int pid, string clrPath, IClrDacDebugger clrDacDebugger) {
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if (clrPath is null)
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throw new ArgumentNullException(nameof(clrPath));
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var clrDac = CreateCore(pid, clrPath, clrDacDebugger);
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Debug2.Assert(clrDac is not null);
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return clrDac ?? NullClrDac.Instance;
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}
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ClrDac? CreateCore(int pid, string clrPath, IClrDacDebugger clrDacDebugger) {
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DataTarget? dataTarget = null;
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bool failed = true;
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try {
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// The timeout isn't used if Passive is used
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dataTarget = DataTarget.AttachToProcess(pid, 0, AttachFlag.Passive);
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var clrInfo = GetClrInfo(dataTarget, clrPath);
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if (clrInfo is null)
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return null;
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// Use this overload to make sure it doesn't try to download the dac file which
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// will block this thread for several seconds or much longer.
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var clrRuntime = clrInfo.CreateRuntime(clrInfo.LocalMatchingDac);
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var clrDac = new ClrDacImpl(dataTarget, clrRuntime, clrDacDebugger);
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failed = false;
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return clrDac;
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}
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catch (ClrDiagnosticsException) {
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return null;
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}
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catch (IOException) {
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return null;
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}
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catch (InvalidOperationException) {
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return null;
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}
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finally {
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if (failed)
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dataTarget?.Dispose();
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}
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}
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static ClrInfo? GetClrInfo(DataTarget dt, string clrPath) {
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foreach (var clrInfo in dt.ClrVersions) {
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if (!StringComparer.OrdinalIgnoreCase.Equals(clrInfo.ModuleInfo.FileName, clrPath))
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continue;
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Debug.Assert(File.Exists(clrInfo.LocalMatchingDac));
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if (!File.Exists(clrInfo.LocalMatchingDac))
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continue;
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return clrInfo;
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}
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return null;
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}
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}
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}
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