Re: [Haskell-cafe] Unrecognized function symbols in .prof

* Iavor Diatchki [2011-02-07 23:45:58-0800]

Another option would be to look at the generated core by using -ddump-simpl when compiling. This will generate a whole bunch of output, which you can redirect to a file and the search for the mysterious symbols inside.

IIRC they are generated at random each time.

On Mon, Feb 7, 2011 at 11:12 PM, Lee Pike wrote:

...

Hi,

I am profiling a Haskell program using GHC, and after executing the program with +RTS -p, I get a .prof file that lists the cost centers of the program. Some of the cost centers listed are for function symbols that do not exist in the given module. For example, I have in my .prof file:

COST CENTRE MODULE %time %alloc ==_a2MT Foo 19.8 0.0 ==_a2R8 Foo 17.8 0.0 ==_a2Bg Bar 13.7 0.0 .... ....

It appears these are generated symbols; how do I find out what those function symbols correspond to? (In this case, my assumption is that these symbols refer to instances of the Eq class, but I'm not sure.)

[I couldn't find anything about this in the GHC online documentation or via Googling, but sorry if I missed it.]

-- Roman I. Cheplyaka :: http://ro-che.info/ Don't worry what people think, they don't do it very often.