Re: [testsuite] setting sysroot for target-board

[Pedro Alves <pedro at codesourcery dot com>]

On Sunday 08 May 2011 18:01:16, Wei-cheng Wang wrote:
> On Fri, May 6, 2011 at 5:47 PM, Pedro Alves <pedro@codesourcery.com> wrote:
> > On Friday 06 May 2011 03:24:08, Wei-cheng Wang wrote:
> > Doing this here assumes you'll only need the sysroot after connecting.
> > How have you tested this?  It seems you forgot the MI equivalent.
> Yes, I did test it.
> I found this issue when I tested gdb/gdbserver with a remote
> cross-target. Some thread- and shared library-related test cases
> failed due to using the wrong shared libraries for the host, so I
> tried to add sysroot support and Iâve tested it again to make sure gdb
> will use the right shared libraries for the target.
> > I think a better place would be right after spawning
> > gdb (default_gdb_start/default_mi_gdb_start).  If since you
> > already have a board file anyway, you could also override *gdb_start
> > and do it there instead of adding a new flag.
> I agree. Itâs better to put this in default_gdb_start/default_mi_gdb_start.
> Since these two functions are not just a few of lines,

You'd override "gdb_start", which is already a hook, not default_gdb_start
itself:

proc gdb_start { } {
    default_gdb_start
}

You can also override big functions in tcl and rename/call
the overridden version, so that the fact that the functions
are big is not a problem, though that's a bit hackish.

> I will suggest adding this support, so it much easier to set sysroot as needed.

Agreed.

> And here is the update according to your suggestion. Thanks.

Thanks.  The tab/space/indenting looked a bit off, not sure
that's just patch/email tricking me, but otherwise looks
good to me.


> - - - -
> 2011-05-06  Wei-cheng Wang <cole945@gmail.com>
> 
>         * lib/gdb.exp (default_gdb_start): Add support for setting sysroot for
>         target system.
>         * lib/mi-support.exp (default_mi_gdb_start): Likewise.
> 
> diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
> index 20e2fb7..c6fa62d 100644
> --- a/gdb/testsuite/lib/gdb.exp
> +++ b/gdb/testsuite/lib/gdb.exp
> @@ -1349,6 +1349,18 @@ proc default_gdb_start { } {
>  	    warning "Couldn't set the width to 0."
>  	}
>      }
> +
> +    if [target_info exists gdb,sysroot] {
> +        send_gdb "set sysroot [target_info gdb,sysroot]\n"
> +        gdb_expect 10 {
> +	    -re "$gdb_prompt $" {
> +	        verbose "Setting sysroot to [target_info gdb,sysroot]" 2
> +	    }
> +	    timeout {
> +                warning "Couldn't set the sysroot to [target_info gdb,sysroot]"
> +	    }
> +        }
> +    }
>      return 0;
>  }
> 
> diff --git a/gdb/testsuite/lib/mi-support.exp b/gdb/testsuite/lib/mi-support.exp
> index e1dbd19..15565bc 100644
> --- a/gdb/testsuite/lib/mi-support.exp
> +++ b/gdb/testsuite/lib/mi-support.exp
> @@ -221,6 +221,17 @@ proc default_mi_gdb_start { args } {
>  	    }
>      	}
>      }
> +    if [target_info exists gdb,sysroot] {
> +    send_gdb "103-gdb-set sysroot [target_info gdb,sysroot]\n"
> +        gdb_expect 10 {
> +	    -re ".*103-gdb-set sysroot [target_info
> gdb,sysroot]\r\n103\\\^done\r\n$mi_gdb_prompt$" {
> +	        verbose "Setting sysroot to [target_info gdb,sysroot]" 2
> +	    }
> +	    timeout {
> +	        warning "Couldn't set the sysroot to [target_info gdb,sysroot]."
> +	    }
> +        }
> +    }
> 
>      detect_async
> 

-- 
Pedro Alves