I didn't see any constant PI value. If I hv seen that I would hv noticed that.
I am on Windows... What do u mean by "open that compiled application in
Reflector"? I never used that before.
I am writing an application using Visual Studio. Nothing wrong with my code
right?
From: Tommy Carlier
Sent: Sunday, January 10, 2010 9:19 PM
To: [email protected]
Subject: Re: [mono-cecil] Field read and write
That's right. Try this (if you're on Windows): compile an application that
references a constant (like Math.PI), and open that compiled application in
Reflector. The call the Math.PI will have been replaced by a constant value.
2010/1/10 Wee Li Yen <[email protected]>
Tommy, so what u mean is there is no way I can detect field read and write in
this case?
But how come Jb said "So if you want to detect where PI is used, you have to
check for the `ldc.r8 Math.PI` pattern."? My previous post was trying to say
that I can't find this.
From: Tommy Carlier
Sent: Sunday, January 10, 2010 8:21 PM
To: [email protected]
Subject: Re: [mono-cecil] Field read and write
Because Math.PI is a constant, the compiler will just copy its value to the
location of where it's used. So, if your code says "double pi = Math.PI;", the
compiler will translate it to "double pi = 3.1415926...;". That's why there are
no references to Math.PI.
2010/1/10 Wee Li Yen <[email protected]>
Sorry to bother you on this issue again.
I print out all the instructions from VisitInstruction (BaseCodeVisitor) in
this way:
OpCode opCode = instr.OpCode;
object operand = instr.Operand;
Console.Write("###" + opCode + " " + ((operand != null)?
operand.ToString() : "") + "###");
Console.WriteLine();
But I don't see ldc.r8 Math.PI...
Do you know why? Thanks...
--------------------------------------------------
From: "Jb Evain" <[email protected]>
Sent: Friday, January 08, 2010 5:58 PM
To: <[email protected]>
Subject: Re: [mono-cecil] Field read and write
2010/1/8 Li Yen Wee <[email protected]>:
But how has it got to do with me not being able to detect the field
PIValue
as written and Math.PI as read?
Again, if you had bothered to investigate a little bit you would know.
PI is defined as a constant, so the compiler will inline its value
everywhere it's used
var pi = Math.PI is compiled as:
ldc.r8 3.1415926535897931
stloc pi
So if you want to detect where PI is used, you have to check for the
`ldc.r8 Math.PI` pattern.
--
Jb Evain <[email protected]>
--------------------------------------------------------------------------------
--
--
mono-cecil--
--
mono-cecil
