I suppose you could do it that way, but isn't there a better way? I'd like to minimize extra work but this function is important in maintaining a large project.
Please?
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Delphi: Capturing a procedure or function's Name for logging purposes
Is there a way in Delphi (Developer Studio 2006) to grab the name of a procedure or function for logging purposes? example:
function MyMultiply(x, y: Integer): Integer;
var Mystring: String;
begin
result:=x*y;
MyString:= // something here that returns 'MyMultiply'
LogThis('Function Called: '+MyString);
end;
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Answers
Yes, there is a way. The following code will get the memory address of the routine that calls Log. When you call a function or procedure, the return address is placed on the stack. Log pulls this off the stack, and sends it to the LogAddress procedure through the EAX register. LogAddress needs some work (I'll explain in a moment what needs to be done), but for now it will just show you the address of the where Log was called. To use it, all you need to do is call Log anywhere in your application, be it in a class, function, procedure, whereever.
procedure LogAddress(ptr: pointer);
begin
ShowMessage(inttoHex(integ
end;
procedure Log;
begin
asm
pop EAX
push EAX
call LogAddress
end;
end;
procedure MyProc;
begin
Log;
end;
procedure TForm3.Button1Click(Sender
begin
Log;
end;
procedure TForm3.FormCreate(Sender: TObject);
begin
Log;
MyProc;
end;
Now, to make the address usable, you need to replace the ShowMessage code in LogAddress with code that looks up the address in the detailed map file. You generate a detailed map file under the Project | Options | Linker menu option in Delphi. In this same dialog you'll notice an image base value that defaults to $00400000. To make sense of the map file, you take this image base value, add $1000, and that's the address needed to look up the value in the map file. To see that this works, pull up the Windows calculator, using the scientific mode (so you can use hex addresses), and do the math using the show message data. You'll find that you can not only locate the routine that called it, you can even locate the line of code following where the Log statement is called. Note that the map file must be up to date for this to work, so you must do a build all for these addresses to be in sync.
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by: TNamePosted on 2007-05-26 at 06:05:03ID: 19161806
I guess simply hardcoding it not an option?
E.g.:
function MyMultiply(x, y: Integer): Integer;
const Mystring = 'MyMultiply';
begin
result:=x*y;
LogThis('Function Called: '+MyString);
end;