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Date: Fri, 21 Oct 2011 08:42:00 -0000
From: Jan Kratochvil <jan.kratochvil@redhat.com>
To: Kevin Pouget <kevin.pouget@gmail.com>
Cc: Tom Tromey <tromey@redhat.com>, gdb-patches@sourceware.org
Subject: Re: Dejagnu testing issue
Message-ID: <20111021083242.GA8363@host1.jankratochvil.net>
References: <CAPftXULqAZSLVrHf_FZcQtP4Lu4q5RW5N4bRVq3gVtGsBW8_+w@mail.gmail.com> <m31uu7r9jo.fsf@fleche.redhat.com> <CAPftXUJ5xrFnYRVK+-FkRw_Gv48BscqOBw2mpo8rA5OJdTJtVw@mail.gmail.com>
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On Fri, 21 Oct 2011 10:14:42 +0200, Kevin Pouget wrote:
> for the record, here is the way to get the pid based on "expect_out":
> 
> gdb_test_multiple "info inferior" "list inferiors" {
>     -re ".* \* 1.*process (\[0-9\]*).*$gdb_prompt $" {
> 	set pid $expect_out(1,string)
> 	pass "list inferiors"
>     }
> }

While it works to make it working as was intended it could be for example:

gdb_test_multiple "info inferior" "list inferiors" {
    -re "\r\n\\* 1 *process (\[0-9\]*) .*\r\n$gdb_prompt $" {
        set pid $expect_out(1,string)
        pass "list inferiors"
    }
}

Initial .* is redundant, start of the expect string is not anchored.

\* is equal to * as the first level of backslashes is parsed by TCL
interpreter, not by the regex compiler.

If one fixes \* -> \\* to really match an asterisk it no longer matches.
The asterisk is preceded by a newline, not by a space as in your regex string.


Regards,
Jan