David Srbecký
13 years ago
23 changed files with 311 additions and 341 deletions
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@@ -0,0 +1,101 @@
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using System.Runtime.CompilerServices; |
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using ICSharpCode.NRefactory.TypeSystem; |
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using Debugger.Interop.CorDebug; |
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namespace Debugger |
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{ |
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public static class Util |
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{ |
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// Type-safe box because ConditionalWeakTable requires reference type
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class Box<T> |
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{ |
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public T Value; |
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public static implicit operator Box<T>(T value) |
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{ |
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return new Box<T> { Value = value }; |
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} |
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} |
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static ConditionalWeakTable<IUnresolvedMember, Box<bool>> hasStepOverAttribute = new ConditionalWeakTable<IUnresolvedMember, Box<bool>>(); |
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public static bool HasStepOverAttribute(this IMethod method) |
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{ |
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return hasStepOverAttribute.GetValue(method.UnresolvedMember, delegate { |
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string[] debuggerAttributes = { |
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typeof(System.Diagnostics.DebuggerStepThroughAttribute).FullName, |
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typeof(System.Diagnostics.DebuggerNonUserCodeAttribute).FullName, |
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typeof(System.Diagnostics.DebuggerHiddenAttribute).FullName |
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}; |
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if (method.Attributes.Any(a => debuggerAttributes.Contains(a.AttributeType.FullName))) |
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return true; |
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if (method.DeclaringType.GetDefinition().Attributes.Any(a => debuggerAttributes.Contains(a.AttributeType.FullName))) |
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return true; |
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return false; |
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}).Value; |
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} |
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static ConditionalWeakTable<IUnresolvedMember, Box<uint>> backingFieldToken = new ConditionalWeakTable<IUnresolvedMember, Box<uint>>(); |
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/// <summary> Is this method in form 'return this.field;'? </summary>
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public static uint GetBackingFieldToken(this IMethod method) |
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{ |
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return backingFieldToken.GetValue(method.UnresolvedMember, delegate { |
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ICorDebugCode corCode; |
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try { |
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corCode = method.ToCorFunction().GetILCode(); |
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} catch (System.Runtime.InteropServices.COMException) { |
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return 0; |
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} |
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if (corCode == null || corCode.IsIL() == 0 || corCode.GetSize() > 12) { |
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return 0; |
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} |
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List<byte> code = new List<byte>(corCode.GetCode()); |
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uint token = 0; |
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bool success = |
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(Read(code, 0x00) || true) && // nop || nothing
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(Read(code, 0x02, 0x7B) || Read(code, 0x7E)) && // ldarg.0; ldfld || ldsfld
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ReadToken(code, ref token) && // <field token>
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(Read(code, 0x0A, 0x2B, 0x00, 0x06) || true) && // stloc.0; br.s; offset+00; ldloc.0 || nothing
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Read(code, 0x2A); // ret
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if (!success) { |
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return 0; |
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} |
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return token; |
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}).Value; |
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} |
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// Read expected sequence of bytes
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static bool Read(List<byte> code, params byte[] expected) |
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{ |
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if (code.Count < expected.Length) |
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return false; |
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for(int i = 0; i < expected.Length; i++) { |
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if (code[i] != expected[i]) |
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return false; |
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} |
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code.RemoveRange(0, expected.Length); |
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return true; |
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} |
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// Read field token
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static bool ReadToken(List<byte> code, ref uint token) |
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{ |
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if (code.Count < 4) |
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return false; |
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if (code[3] != 0x04) // field token
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return false; |
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token = ((uint)code[0]) + ((uint)code[1] << 8) + ((uint)code[2] << 16) + ((uint)code[3] << 24); |
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code.RemoveRange(0, 4); |
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return true; |
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} |
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} |
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} |
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