From: Brian Candler <B.Candler@...>
Date: 2003-07-23T21:00:23+09:00
Subject: Re: Embedding problem - SEGV

On Wed, Jul 23, 2003 at 08:49:38PM +0900, Brian Candler wrote:
> It seems to work, but the problem is that untrapped exceptions cause a SEGV
> and a core dump.

Spoke too soon - requiring a .so also causes it to segfault.

$ cat embed.c
#include <stdio.h>
#include <ruby.h>

int main(void)
{
        printf("Starting\n");
        ruby_init();
        ruby_init_loadpath();
        ruby_script("embed");
        rb_require("socket");    /* <<< segfaults here */

#if RUBY_VERSION_CODE >= 180
        rb_cleanup(0);
#endif
        printf("Done\n");
        return 0;
}


The backtrace is not helpful though:

(gdb) bt
#0  0x28150b78 in kill () from /usr/lib/libc.so.4
#1  0x28191742 in abort () from /usr/lib/libc.so.4
#2  0x80afb92 in rb_bug (fmt=0x80c54ce "Segmentation fault") at error.c:179
#3  0x8097667 in sigsegv (sig=11) at signal.c:393
#4  0xbfbfffac in ?? ()
#5  0x8055ab0 in rb_require (fname=0x80b0f91 "socket") at eval.c:5538
#6  0x804a809 in main () at embed.c:10
#7  0x804a73d in _start ()

So it's definitely looks like some missing initialisation.
rb_load_file("/dev/null") doesn't help, and I can't use ruby_run() because
that exits the C program.

Thanks for any suggestions...

Brian.