[Bug gcov-profile/82614] GCOV crashes while parsing gcda file

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82614

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |ASSIGNED

--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Marco Castelluccio from comment #10)
> (In reply to Martin Liška from comment #9)
> > (In reply to Marco Castelluccio from comment #8)
> > > Created attachment 42462 [details]
> > > Archive with GCNO and GCDA file generated with GCC 6
> > > 
> > > This is an archive containing the GCNO and GCDA files generated with GCC 6.
> > > 
> > > We are going to test 7 next.
> > 
> > Thanks for that. Still can't reproduce and it will be highly probably that
> > it's related to fact that I do not have source files which are annotated.
> > Can you please attach them?
> > 
> > Moreover, can you please run it in gdb and paste full backtrace?
> 
> I don't have the source files either, they are built on a remote machine and
> I'm only downloading the gcno/gcda file.
> 
> Here's the backtrace:
> #0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
> #1  0x00007ffff7a2df5d in __GI_abort () at abort.c:90
> #2  0x00007ffff7a7628d in __libc_message (action=action@entry=(do_abort |
> do_backtrace), fmt=fmt@entry=0x7ffff7b9b9e6 "*** %s ***: %s terminated\n")
>     at ../sysdeps/posix/libc_fatal.c:181
> #3  0x00007ffff7b1c7ef in __GI___fortify_fail_abort
> (need_backtrace=need_backtrace@entry=true, msg=msg@entry=0x7ffff7b9b96d
> "buffer overflow detected")
>     at fortify_fail.c:33
> #4  0x00007ffff7b1c811 in __GI___fortify_fail (msg=msg@entry=0x7ffff7b9b96d
> "buffer overflow detected") at fortify_fail.c:44
> #5  0x00007ffff7b1a500 in __GI___chk_fail () at chk_fail.c:28
> #6  0x00007ffff7b199e9 in _IO_str_chk_overflow (fp=<optimized out>,
> c=<optimized out>) at vsprintf_chk.c:31
> #7  0x00007ffff7a7ad59 in __GI__IO_default_xsputn (f=0x7fffffffd0f0,
> data=<optimized out>, n=19) at genops.c:455
> #8  0x00007ffff7a4932d in _IO_vfprintf_internal (s=s@entry=0x7fffffffd0f0,
> format=<optimized out>, format@entry=0x46f771 "%ld", 
>     ap=ap@entry=0x7fffffffd230) at vfprintf.c:1642
> #9  0x00007ffff7b19a8b in ___vsprintf_chk (s=0x697670 <format_gcov(long,
> long, int)::buffer> "-674122451547433726", flags=1, slen=20, 
>     format=0x46f771 "%ld", args=args@entry=0x7fffffffd230) at
> vsprintf_chk.c:82
> #10 0x00007ffff7b199ba in ___sprintf_chk (s=s@entry=0x697670
> <format_gcov(long, long, int)::buffer> "-674122451547433726",
> flags=flags@entry=1, 
>     slen=slen@entry=20, format=format@entry=0x46f771 "%ld") at
> sprintf_chk.c:31
> #11 0x0000000000405934 in sprintf (__fmt=0x46f771 "%ld", __s=0x697670
> <format_gcov(long, long, int)::buffer> "-674122451547433726")
>     at /usr/include/x86_64-linux-gnu/bits/stdio2.h:34
> #12 format_gcov (top=<optimized out>, bottom=<optimized out>, dp=-1) at
> ../../src/gcc/gcov.c:1998
> #13 0x0000000000404b41 in output_lines (src=0x1108e00, gcov_file=0x71a650)
> at ../../src/gcc/gcov.c:2563
> #14 output_gcov_file (src=0x1108e00, file_name=0xa8f490
> "Unified_cpp_js_src31.gcda") at ../../src/gcc/gcov.c:962
> #15 generate_results (file_name=<optimized out>) at ../../src/gcc/gcov.c:1035
> #16 main (argc=<optimized out>, argv=<optimized out>) at
> ../../src/gcc/gcov.c:640

Thanks! Now I know where's the problem. Let me fix it.