heap profile character encoding confusion
Heap profiling this UTF-8 source file (where ø is encoded as C3 B8) with ghc-7.0.3 on GNU/Linux with LANG=en_GB.utf8 seems to give an output .hp file in ISO-8859 encoding (where ø is encoded as F8).
føb :: Integer -> Integer
føb n
| n == 0 = 0
| n == 1 = 1
| n >= 2 = føb (n - 1) + føb (n - 2)
main :: IO ()
main = print (føb 100)
hexdump extract from .hp file:
00000000 28 32 39 33 29 66 f8 62 2f 43 41 46 3a 6c 76 6c |(293)f.b/CAF:lvl|
00000010 31 5f 72 50 70 09 34 30 0a |1_rPp.40.|
00000019
This causes some problems for heap profile visualization programs:
- hp2ps: viewing the .ps in evince shows a wrong character (slashed-l instead of ø)
- hp2pretty: viewing the .svg with rsvg aborts with an invalid utf8 error
hp2any-core seemed to handle the character encoding correctly in this test (displayed as "\248") with correct appearance in hp2any-graph's OpenGL window.
I'd like to know if ISO-8859 will always be used for .hp files, or if the ISO-8859 is a misfeature and UTF-8 will be used in future, or if it will eventually use the current locale settings.
I didn't find any documentation on character encoding here: http://www.haskell.org/ghc/docs/latest/html/users_guide/prof-heap.html
Trac metadata
Trac field | Value |
---|---|
Version | 7.0.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Documentation |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | claudiusmaximus@goto10.org |
Operating system | |
Architecture |