Assembler errors when compiling nofib benchmarks with -optc-g

31 Oct 2009

      Hi,

I am working with another grad student on a course project on cache
behavior of GHC programs.  The first part of this project is to reproduce
some of the measurements from Nethercote and Mycroft's "The Cache Behavior
of Large Lazy Functional Programs on Stock Hardware".

We've decided to use oprofile to sample cache misses recorded by the
performance counters.  To get reasonable information out of oprofile, I'd
like to compile the nofib benchmarks via C with export of debugging
symbols.

As a first step toward this, I've changed the NoFibHcOpts variable in
nofib/mk/boilerplate.mk to be:

    NoFibHcOpts = -O -fvia-C -pgmc gcc -optc-g

However, when I do make in the nofib/real/compress directory, for example,
I get the following error message:

==nofib== compress: time to compile BinConv follows...
/usr0/software/ghc-6.10.1/inplace/bin/ghc-stage2 -H32m -O -O -fvia-C -pgmc
gcc -optc-g -Rghc-timing -H32m -hisuf hi -c BinCon
v.hs -o BinConv.o
<>
1.27user 0.12system 0:01.39elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+21251minor)pagefaults 0swaps
==nofib== compress: size of BinConv.o follows...
   text    data     bss     dec     hex filename
   6677     192       8    6877    1add BinConv.o
==nofib== compress: time to compile BinTest follows...
/usr0/software/ghc-6.10.1/inplace/bin/ghc-stage2 -H32m -O -O -fvia-C -pgmc
gcc -optc-g -Rghc-timing -H32m -hisuf hi -c BinTes
t.hs -o BinTest.o
/tmp/ghc14909_0/ghc14909_0.s: Assembler messages:

/tmp/ghc14909_0/ghc14909_0.s:54:0:  Error: unassigned file number 1

/tmp/ghc14909_0/ghc14909_0.s:54:0:
     Error: junk at end of line, first unrecognized character is `0'

/tmp/ghc14909_0/ghc14909_0.s:56:0:  Error: unassigned file number 1

/tmp/ghc14909_0/ghc14909_0.s:56:0:
     Error: junk at end of line, first unrecognized character is `0'

/tmp/ghc14909_0/ghc14909_0.s:57:0:  Error: unassigned file number 1

/tmp/ghc14909_0/ghc14909_0.s:57:0:
     Error: junk at end of line, first unrecognized character is `0'

/tmp/ghc14909_0/ghc14909_0.s:61:0:  Error: unassigned file number 1

/tmp/ghc14909_0/ghc14909_0.s:61:0:
     Error: junk at end of line, first unrecognized character is `0'

etc...

Curiously, if I remove the -optc-g flag, but still use -fvia-C and -pgmc
gcc, everything works fine.

Do you have any ideas what might be causing these errors?  Is there a fix
or workaround to get the C compiler to export debugging symbols?

Second, it appears that a make with -fvia-C -pgmc gcc removes the C source
after it has been compiled.  Is there a way to preserve this source so
that it can be annotated line by line using oprofile?

I apologize if these questions are rudimentary; this is my first
experience with GHC and nofib.  Also, if these questions should be
directed toward a different mailing list, please let me know.

Thanks for any help you can give with this!

Henry

Henry DeYoung

Guilherme Oliveira

Simon Marlow

Henry DeYoung

Simon Marlow

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