Hi,

Enclosed is a patch to allow interrupting
map_symbol_filenames_psymtab. This patch adds a call to QUIT in
map_symbol_filenames_psymtab, and several functions to cleanup data
that would have leaked.

Also, this patch adds a cleanup for the existing leak in
default_make_symbol_completion_list_break_on (check return_val's
relation to the existing QUITs). Although the new QUIT doesn't
introduce this particular leak, it creates many more opportunities for
it to happen.

Thanks,

Sterling
--
2011-10-27  Sterling Augustine  <saugustine@google.com>

	* psymtab.c (map_symbol_filenames_psymtab): Call QUIT.
	* symtab.c (free_completion_list): New function.
	(do_free_completion_list): Likewise.
	(default_make_symbol_completion_list_break_on): New variable
	back_to. Call make_cleanup and discard_cleanups.
	(make_source_files_completion_list): Likewise.