profiling problems

[Hal Daume III]

Have you removed the .o and .hi files before compiling with -prof?  These
are not compatible.

--
Hal Daume III

 "Computer science is no more about computers    | hdaume@isi.edu
  than astronomy is about telescopes." -Dijkstra | www.isi.edu/~hdaume

On Tue, 25 Feb 2003, Damien R. Sullivan wrote:

> I have this code which compiles and runs normally, but gives bus errors or
> segfaults at run time when compiled with -prof -auto-all.  ghc-5.04
> SunOS cownose.cs.indiana.edu 5.8 Generic_108528-18 sun4u sparc SUNW,Ultra-5_10
> 
> What's wrong?
> 
> import Numeric
> import Ratio
> import System
> 
> top 1 = 1
> top n = 9*n*top (n-2) + oddfact (n-2)
> 
> lfact :: [Integer]
> lfact = 1 : zipWith (*) [3,5 .. ] lfact
> 
> oddfact :: Integer -> Integer
> oddfact n = lfact!!ni
>     where 
>     ni = nint `div` 2
>     nint = fromInteger n
> 
> log_two :: Int -> Rational
> log_two lim = 2* top n % (3^lim * oddfact n)
>     where n = fromIntegral lim
> 
> log_tup :: Int -> (Rational, Rational)
> log_tup lim =
>     -- TODO any chance I can drop the br?  Would it get me more than a digit?
>     (l + lo_err, l + hi_err)
>     where 
>     l = log_two lim
>     -- TODO double check these
>     lo_err = (2)/(n+1)*(d/(1+c))^(lim+1)
>     hi_err = (2)/(n+1)*d^(lim+1)
> -- original logs
> --     lo_err = (-2)/(n+1)*(d/(1+c))^(lim+1)
> --     hi_err = -lo_err
>     -- lo_err = (-1)/(n+1)*x^(lim+1)
>     -- c = 0
>     n = toRational lim
>     d = 1%3
>     c = d
> 
> log_tup_str lim = 
>     (floatlo, floathi, diff)
>     where 
>     (lo, hi) = log_tup lim
>     floatlo = floatRat lo lim
>     floathi = floatRat hi lim
>     diff = floathi - floatlo
> 
> 
> floatRat :: Rational -> Int -> Integer
> floatRat r lim =
>     num*10^lim `div` den
>     where
>     num = numerator r
>     den = denominator r
> 
> main :: IO ()
> main = 
>      do
>         args <- System.getArgs
>         let lim :: Int
>             lim = read (args!!0)
>         let (s1, s2, s3) = log_tup_str lim
>         let sh1 = show s1
>         let l1 = length sh1
>         let shd = show s3
>         let ld = length shd
>         putStrLn (show s1)
>         putStrLn (show s2)
>         putStrLn (show s3)
>         putStr "digits: "
>         putStrLn (show (l1-ld))
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