Re: [Tinycc-devel] Bug: segfault when running empty file on tcc-0.9.26-win64

[grischka]

André Willik Valenti wrote:
> It happened using binaries from
> http://download.savannah.gnu.org/releases/tinycc/.

0,9,26 is rather old.  You might want to try the 'mob' branch
from http://repo.or.cz/w/tinycc.git which we'll use for next
release -- hopefully soon ;)

-- gr

> Tried also via libtcc and the same happened: on win32, it works fine; on
> win64, a segfault happens. Here's the code:
>
>
> #include <stdlib.h>
> #include <stdio.h>
> #include <string.h>
>
> #include "libtcc.h"
>
> char my_program[] = "\n";
>
> int main(int argc, char **argv)
> {
>     TCCState *s = tcc_new();
>     tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
>     tcc_compile_string(s, my_program);
>     tcc_relocate(s, TCC_RELOCATE_AUTO); // <-- segfault here
>     return 0;
> }
>
>
> 2017-07-05 0:18 GMT-03:00 André Willik Valenti <address@hidden>:
>
> > Hello,
> >
> > I believe I've found a bug. It happens on 64-bit version of tcc for
> > Windows. No problems were found on 32-bit Windows or 64-bit Linux
> > (installed from apt-get).
> >
> > To reproduce, run on a terminal:
> >
> > REM Creates an empty file
> > type nul > empty.c
> >
> > REM win32 tcc works normally
> > win32\tcc empty.c
> > tcc: error: undefined symbol 'main'
> >
> > REM win32 tcc works normally
> > win32\tcc -run empty.c
> > tcc: error: main not defined
> >
> > REM win64 tcc works normally when generating file output
> > win64\tcc empty.c
> > tcc: error: undefined symbol 'main'
> >
> > REM ...but crashes with a segfault when running source code directly
> > win64\tcc -run empty.c
> >
> >
> > The same happens with a file containing just
> >
> > #
> >
> > or
> >
> > #inclu
> >
> >
> > Regards,
> > André