Add tests that backtrace and backtrace_symbols produce correct results

[Andreas Schwab]

"Joseph S. Myers" <joseph@codesourcery.com> writes:

> +  if (strstr (symbols[i++], "read") == NULL)
> +    {
> +      /* Perhaps symbols[2] is __kernel_vsyscall?  */
> +      if (strstr (symbols[i++], "read") == NULL)
> +	{
> +	  FAIL ();

This can only work if you have unwind information.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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