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From: Eli Zaretskii <eliz@gnu.org>
To: "Rob Quill" <rob.quill@gmail.com>
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In-reply-to: <baf6008d0610230345m4c079635h5c5110cf5d01ab45@mail.gmail.com> 	(rob.quill@gmail.com)
Subject: Re: Command File Scope Checking
Reply-to: Eli Zaretskii <eliz@gnu.org>
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> Date: Mon, 23 Oct 2006 11:45:23 +0100
> From: "Rob Quill" <rob.quill@gmail.com>
> 
> Is it possible to check if a variable is in scope when using a command
> file, because I don't want control to return to GDB when a variable
> goes out of scope, so I would like to know if a variable is in scope
> before I check the value of it.

    (gdb) info address foobar
    No symbol "foobar" in current context.

If the variable _is_ in scope, you will see a different message, like
this:

    (gdb) info address arglen
    Symbol "arglen" is a variable in register eax.

or maybe this:

    Symbol "gdb_use_lsb" is static storage at address 0x815e720