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libctf, dedup: add deduplicator

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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.
This commit is contained in:
Nick Alcock
2020-06-05 18:35:46 +01:00
parent a9b9870206
commit 0f0c11f7fc
14 changed files with 3401 additions and 24 deletions
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2
include/ctf-api.h
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@@ -83,7 +83,7 @@ typedef struct ctf_link_sym
/* Share all types that are not in conflict. The default. */
#define CTF_LINK_SHARE_UNCONFLICTED 0x0
/* Share only types that are used by multiple inputs. Not implemented yet. */
/* Share only types that are used by multiple inputs. */
#define CTF_LINK_SHARE_DUPLICATED 0x1
/* Create empty outputs for all registered CU mappings even if no types are