[Haskell-cafe] Getting segmentation fault when profiling, despite `-K100M'.

[Niklas Larsson]

Reading a bit closer I assume you have already done that. Sorry for that.

Regards,
Niklas

2011/8/16 Niklas Larsson <metaniklas at gmail.com>:
> If you want to call a Haskell function from C you should do a "foreign
> export" of the function, that will create a stub function with C
> calling convention that you can call.
>
> Regards,
> Niklas
>
> 2011/8/16 David Banas <dbanas at banasfamily.net>:
>> Hi all,
>>
>> I'm trying to profile a mixed language program, in which Haskell is NOT
>> the top layer and does not contain the `main' function. (C is/does.)
>>
>> Is this effort doomed to fail?
>>
>> I'm getting a segmentation fault, as soon as the first Haskell function
>> is called, despite having included `-K100M' in my list of +RTS args:
>>
>>  19     int argc = 5;
>>  20     char* argv[] = {"ghcDll",
>>  21                     "+RTS",
>>  22                     "-hc",
>>  23                     "-p",
>>  24                     "-K100M",
>>  25                     NULL}; // argv must end with NULL
>>  26
>>  27     // Initialize Haskell runtime
>>  28     char** args = argv;
>>  29     hs_init(&argc, &args);
>>
>> Using gdb to trace through the C-code, up until the first call to
>> Haskell, I get to here:
>>
>>  64     // Call the Haskell function.
>>  65     res = amiInit(
>>  66         impulse_matrix,
>>  67         row_size,
>>
>> Here's the beginning of `amiInit':
>>
>>  41 -- Our Haskell implementation of `AMI_Init'.
>>  42 amiInit :: Ptr CDouble -> CInt -> CInt -> CDouble -> CDouble ->
>>  43            CString -> Ptr CString -> Ptr (StablePtr AmiModel) -> Ptr
>> CString -> IO Int
>>  44 amiInit impulse_matrix row_size aggressors sample_interval bit_time
>>  45         ami_parameters_in ami_parameters_out ami_memory_handle
>> msgHndl
>>  46     | impulse_matrix == nullPtr = return 0
>>  47     | otherwise = do
>>  48         putStrLn "I'm here."
>>
>> I never see "I'm here." printed to my console, before I get the
>> segmentation fault.
>>
>> Any thoughts?
>>
>> Thanks,
>> -db
>>
>>
>>
>> _______________________________________________
>> Haskell-Cafe mailing list
>> Haskell-Cafe at haskell.org
>> http://www.haskell.org/mailman/listinfo/haskell-cafe
>>
>