C Instrumentation Framework

Isn't it an LLVM issue? This bug hardly was never spotted...

This isn't an LLVM issue - it's related with aspectator extension and that's all that i know about this problem...

Found this in the new aspectator as well. Steps to reproduce:

LDV_DEBUG=30 ldv-manager rule_models=32_1a "envs=linux-2.6.31.6.tar.bz2" drivers=drivers/char/agp/intel-agp.ko kernel_driver=1 name=ri12

Excerpt from the error message:

/home/pavel/work/ldv/test/work/current--X--drivers/char/agp/intel-agp.ko--X--ri12linux-2.6.31.6--X--32_1a/linux-2.6.31.6/csd_deg_dscv/11/dscv_tempdir/dscv/ri/32_1a/drivers/char/agp/intel-agp.c.p:29827:1: fatal error: character "" wasn't put to stream
compilation terminated.
Aspectator fails on the 3d stage

The character the aspectator had problems with was "®" :-).

At least 17 drivers are affected (but since cluster missed about 100 drivers with no known reason, the 19 amount explained above is still relevant, I guess).

This message arises due to the following check:

if (putc (c, stream) != c)
  ...

There are 26 drivers (36 module-main pairs) that are affected by this issue in linux-2.6.37.

From man:

       int fputc(int c, FILE *stream);
       int putc(int c, FILE *stream);

       fputc() writes the character c, cast to an unsigned char, to stream.
       putc() is equivalent to fputc() except that it may be implemented as a macro which evaluates stream more than
       once.

  if (putc (c, stream) != c)
    {
      LDV_FATAL_ERROR ("character \"%c\" wasn't put to stream", c);
    }

putc (c, stream) != (unsigned char) c

BTW, so simple bug took too much time (more then 2 years) to be resolved...