Hi,
very new to Emit and Cecil.
looking to insert method calls into my code.
in this example, i am trying to add calls, on each branch statement, inside
my Demo.Do() method
getting very weird results... depends on the instructions i add probes to
---
NullReferenceException from IL Spy,
corrupt assembly when running,
stack size mismatch.
if the code below the right way to inject these calls? what am i doing
wrong?
Thanks,
Koren
*here's the code.*
// target assembly
class Demo {
void Do() {
//...
}
}
class Probe {
void Invoke(string, string, string, int, double) { //... }
}
// in my cecil emitting assembly,
// _module = target assembly
var staticMethod = _module.Types.First(x =>
x.Name.Equals("Probe")).Methods.First(x => x.Name.Equals("Invoke"));
var method = _module.Types.First(x =>
x.Name.Equals("Demo")).Methods.First(x=>x.Name.Equals("Do"));
// get Demo.Do() body
var il = method.Body.GetILProcessor();
// get a collection of branch instructions, i want to invoke the Probe at.
(i.e. if (x>10) { probe(); // ... } else { probe(); //... } )
// i am getting the next nop after the branch statement to avoid splitting
up related il lines
var instructions = method.Body.Instructions
.Where(x => x.OpCode.FlowControl == FlowControl.Cond_Branch)
.Where(x => x.Next != null && x.Next.OpCode.Code ==
Code.Nop)
.Select(x => x.Next)
.ToList();
// loop on relevant instructions, emit the call to Probe
for (int i = 0; i < instructions.Count; i++)
{
var target = instructions[i];
var block = new[] {
il.Create(OpCodes.Ldstr, "p1"),
il.Create(OpCodes.Ldstr, "p2"),
il.Create(OpCodes.Ldstr, "p3"),
il.Create(OpCodes.Ldc_I4, i),
il.Create(OpCodes.Ldc_R8, 0),
il.Create(OpCodes.Call, staticMethod),
il.Create(OpCodes.Nop)
};
for (int b = 0; b < block.Length; b++)
{
il.InsertAfter(target, block[b]);
target = block[b];
}
}
--
--
--
mono-cecil
---
You received this message because you are subscribed to the Google Groups
"mono-cecil" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
