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Questions tagged [il]

CIL (Common Intermediate Language) is a low-level language used by Microsoft .NET Framework and Mono.

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Is there any IL editor to change the bytecode of an assembly?

I've detected some defects on legacy third party assemblies that we're using on our code decompilind them. I would like to fix them but as I don't have the source code I need to directly modify the bytecode. The changes are really simple (changing…
Ignacio Soler Garcia
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Generic syntactic sugar or true improvement

I have a question regarding the following method calls: var ctl1 = this.FindControlRecursively("SomeField") as HiddenField; var ctl = this.FindControlRecursively("SomeField"); Here's IL for these two calls: IL_0010: ldstr …
Pat Lindley
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cecil: Instruction.Operand types corresponding to Instruction.OpCode.Code value

Is there any documentation or is there a part of the cecil source code that I can consult to get a comprehensive view of which Operand types cecil will use for a given Code value? Eg: I can glean from MethodBodyRocks that Ldloc takes an Operand of…
Keith
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High Performance Cloning

I'm after a means of deep cloning an object graph in a perfomant way. I'm going to have multiple threads cloning a graph extremely quickly such that they can play with some state and throw away the results if they're not interesting, returning to…
Ian
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Generating IL for Recursive Methods

I tried to generate IL for recursive method using following strategy, Firstly I defined type using following code snippet private void InitializeAssembly(string outputFileName) { AppDomain appDomain = AppDomain.CurrentDomain; …
Upul Bandara
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What is unsafe in this code?

I am learning about managed and unmanaged code in CLR. So I wrote this example with C-style pointers in C#: unsafe static void Main(string[] args) { int x; int* y; y = &x; *y = 50; Console.WriteLine(*y); …
vldmrrdjcc
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What is the maximal number of methods per .NET class

Title asks it all, actually, but still, for completeness sake: Hi, I'm writing a small post-compiling tool in the .NET platform, and while trying to optimize it, I've encountered a question I can-not easily find an answer to from the ECMA standards…
damageboy
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IL: ldfld vs ldflda

I'm writing a small IL-weaving application using Mono.Cecil, that requires me to manipulate the target assembly on an IL level. My question is quite simple, but I still find the matter very confusing. What is the practical difference between the…
ShdNx
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how to catch an int

I am using IL to throw an Int32 and catch it. This is just out of curiosity, I am not trying to achieve anything, so please dont tell me to throw an Exception instead of int. .method private hidebysig static void Main(string[] args) cil managed { …
Nitin Chaudhari
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Are Delegates more lightweight than classes?

I tried disassembling a C# created executable, but I couldn't come to a conclusion. What I'd like to know is that if for the CLR c#'s delegates are really special entities or just a compiler sugar? I ask this because I'm implementing a language that…
Waneck
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How to inject IL into a method at runtime

Title more or less says it all. Based on this article, I've come up with this: public static unsafe void Replace(this MethodBase destination, MethodBase source) { IntPtr srcHandle = source.MethodHandle.GetFunctionPointer(); IntPtr dstHandle…
YellPika
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Does initialization of local variable with null impacts performance?

Lets compare two pieces of code: String str = null; //Possibly do something... str = "Test"; Console.WriteLine(str); and String str; //Possibly do something... str = "Test"; Console.WriteLine(str); I was always thinking that these pieces of code…
petro.sidlovskyy
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Create a copy of method from IL

I am trying to create a copy of a method during runtime using reflection. I have the following code. public static R CopyMethod(Func f, T t) { AppDomain currentDom = Thread.GetDomain(); AssemblyName asm = new AssemblyName(); …
Igor Ševo
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Traverse a c# method and anazlye the method body

Whats the easiest way to traverse a methodinfo in c#? I want to traverse the method body and find field-references and such and retrieves the types. In System.Reflection there is: mi.GetMethodBody().GetILAsByteArray() which is kinda low-level and…
Marcus
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Emit IL code to load a decimal value

I have code like this to emit IL code that loads integer or string values. But I don't know how to add the decimal type to that. It isn't supported in the Emit method. Any solutions to this? ILGenerator ilGen = methodBuilder.GetILGenerator(); if…
ygoe
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