libctf, dedup: add deduplicator

This adds the core deduplicator that the ctf_link machinery calls
(possibly repeatedly) to link the CTF sections: it takes an array
of input ctf_file_t's and another array that indicates which entries in
the input array are parents of which other entries, and returns an array
of outputs.  The first output is always the ctf_file_t on which
ctf_link/ctf_dedup/etc was called: the other outputs are child dicts
that have the first output as their parent.

include/
	* ctf-api.h (CTF_LINK_SHARE_DUPLICATED): No longer unimplemented.
libctf/
	* ctf-impl.h (ctf_type_id_key): New, the key in the
	cd_id_to_file_t.
	(ctf_dedup): New, core deduplicator state.
	(ctf_file_t) <ctf_dedup>: New.
	<ctf_dedup_atoms>: New.
	<ctf_dedup_atoms_alloc>: New.
	(ctf_hash_type_id_key): New prototype.
	(ctf_hash_eq_type_id_key): Likewise.
	(ctf_dedup_atoms_init): Likewise.
	* ctf-hash.c (ctf_hash_eq_type_id_key): New.
	(ctf_dedup_atoms_init): Likewise.
	* ctf-create.c (ctf_serialize): Adjusted.
	(ctf_add_encoded): No longer static.
	(ctf_add_reftype): Likewise.
	* ctf-open.c (ctf_file_close): Destroy the
	ctf_dedup_atoms_alloc.
	* ctf-dedup.c: New file.
        * ctf-decls.h [!HAVE_DECL_STPCPY]: Add prototype.
	* configure.ac: Check for stpcpy.
	* Makefile.am: Add it.
	* Makefile.in: Regenerate.
        * config.h.in: Regenerate.
        * configure: Regenerate.

1 files changed, 2 insertions, 0 deletions

diff --git a/libctf/ctf-open.c b/libctf/ctf-open.c
index 285e0e0..fee7789 100644
--- a/libctf/ctf-open.c
+++ b/libctf/ctf-open.c
@@ -1719,6 +1719,8 @@ ctf_file_close (ctf_file_t *fp)
   ctf_dynhash_destroy (fp->ctf_link_in_cu_mapping);
   ctf_dynhash_destroy (fp->ctf_link_out_cu_mapping);
   ctf_dynhash_destroy (fp->ctf_add_processing);
+  ctf_dedup_fini (fp, NULL, 0);
+  ctf_dynset_destroy (fp->ctf_dedup_atoms_alloc);
 
   for (err = ctf_list_next (&fp->ctf_errs_warnings); err != NULL; err = nerr)
     {