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

[André Willik Valenti]

It happened using binaries from http://download.savannah.gnu.org/releases/tinycc/.

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