[Bug gdb/10684] gdb crashes when given enough multiline input

["john dot wright at hp dot com" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From john dot wright at hp dot com  2009-09-23 00:12 -------
Created an attachment (id=4222)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4222&action=view)
Proposed patch

command_handler: Terminate linebuffer before xstrdup

If a line ends in a backslash, we copy linebuffer into a global
readline_input_state variable, using xstrdup.  But the operations
leading to this point do not guarantee that linebuffer is terminated.
Thus, when we later use xstrcpy to copy it back into the linebuffer
variable, linebuffer will not have enough space allocated to hold
the result.

This patch ensures linebuffer is terminated before calling xstrdup.


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http://sourceware.org/bugzilla/show_bug.cgi?id=10684

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