Iavor, Thanks.
One way to test this would be to name the equality function explicitly. For example, something like this: myEquality x y = ... instance Eq MyType where (==) = myEquality
Good idea (but a little painful!).
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.
The symbols aren't in the core of the module I'm profiling---sorry, I didn't mention that the symbols are from an imported library (compiled with -auto-all, so the library symbols are included in the .prof). Is there a convenient way to dump core when building libraries with cabal? (--ghc-options=-ddump-simpl doesn't seem to do it). Anyway, I'll resort to your option #1. Thanks, Lee
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.]
Thanks, Lee
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