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POCustom Rule in FxCop to only apply to methods called by particular type's method
 

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  1. POCustom Rule in FxCop to only apply to methods called by particular type's method
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    <p>I want to create an FxRule that applies a method, only if the method gets called from a specific class.</p> <p>NOTE: I don't want to just apply a rule to a method of a particular class, i want to be able to handle methods calling other methods calling other methods which do the boxing.</p> <p>I'd like to get FxCop to report problems associated with the method that does the boxing.</p> <p>Below is the code i have so far:</p> <pre><code>using System; using System.Linq; using Microsoft.FxCop.Sdk; using System.Collections.Generic; class CheckUpdatableComponents : BaseIntrospectionRule { private string[] MethodsToCheck = new string[] { "BeginDraw", "BeginRun", "Draw", "EndRun", "EndDraw", "Update" }; /// &lt;summary&gt;Gets the base class hooked up.&lt;/summary&gt; public CheckUpdatableComponents() : base("CheckUpdatableComponents", "FxCopRules.Rules", typeof(CheckUpdatableComponents).Assembly) { } public override ProblemCollection Check(string namespaceName, TypeNodeCollection types) { foreach (var type in types.Where(T =&gt; IsSubClassOf(T, "Microsoft.Xna.Framework.Game"))) { foreach (var MethodToCheck in MethodsToCheck) { Method RunMethod = type.GetMethod(Identifier.For(MethodToCheck)); if (RunMethod != null) { Visit(RunMethod); } } } return Problems; } public override void VisitMethod(Method method) { Problems.Add(new Problem(GetResolution(), method, method.ToString())); // This problem only appears for each of the RunMethods, and doesn't seem to be recursing down the tree. foreach (var Instruction in method.Instructions) { if (Instruction.NodeType == NodeType.Box || Instruction.NodeType == NodeType.Unbox || Instruction.NodeType == NodeType.UnboxAny || Instruction.OpCode == OpCode.Box || Instruction.OpCode == OpCode.Unbox || Instruction.OpCode == OpCode.Unbox_Any) { } } base.VisitMethod(method); } private bool IsSubClassOf(TypeNode type, string typeName) { if (type.FullName == typeName) return true; if (type.BaseType == null) return false; else return IsSubClassOf(type.BaseType, typeName); } } </code></pre> <p>My issue with the above code, is firstly, that it doesn't appear to be recursing. Secondly, that FxCop reports the problems as being associated with the namespace (probably because i kick off the visit using the Check(namespace....) part.</p> <p>My problem is that i want FxCop to report a method that has boxing as a problem, but only if it gets called by a particular method, however i have no way of walking up the call tree, i can only visit lower nodes to check for problems with my starting location.</p> <p>Has anyone done this sort of thing before?</p> <p>How can i find out what methods call a given method?</p>
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    1. USDavid Gardiner
    1. USGeorge Duckett
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      1. POCustom Rule in FxCop to only apply to methods called by particular type's method
      1. USGeorges Dupéron
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