ctfmerge: Assert that there is enough room for types.

[bdrewery]

Summary

This isn't ready but I wanted to show what I'm running with. More fixes like
D24536 are needed first.

[bdrewery]

Hmm I had this at Isilon but not here.

--- cddl/contrib/opensolaris/tools/ctf/cvt/merge.c
+++ cddl/contrib/opensolaris/tools/ctf/cvt/merge.c
@@ -347,7 +347,7 @@ equiv_node(tdesc_t *ctdp, tdesc_t *mtdp, equiv_data_t *ed)
        int (*equiv)(tdesc_t *, tdesc_t *, equiv_data_t *);
        int mapping;

-       if (ctdp->t_emark > ed->ed_clear_mark ||
+       if (ctdp->t_emark > ed->ed_clear_mark &&
            mtdp->t_emark > ed->ed_clear_mark)
                return (ctdp->t_emark == mtdp->t_emark);

[bdrewery]

In D24537#539813, @bdrewery wrote:

Hmm I had this at Isilon but not here.

--- cddl/contrib/opensolaris/tools/ctf/cvt/merge.c
+++ cddl/contrib/opensolaris/tools/ctf/cvt/merge.c
@@ -347,7 +347,7 @@ equiv_node(tdesc_t *ctdp, tdesc_t *mtdp, equiv_data_t *ed)
        int (*equiv)(tdesc_t *, tdesc_t *, equiv_data_t *);
        int mapping;

-       if (ctdp->t_emark > ed->ed_clear_mark ||
+       if (ctdp->t_emark > ed->ed_clear_mark &&
            mtdp->t_emark > ed->ed_clear_mark)
                return (ctdp->t_emark == mtdp->t_emark);

Ah this is already in FreeBSD.

[cem]

cddl/contrib/opensolaris/tools/ctf/cvt/merge.c

455

Are we still doing FreeBSD ifdefs (or ifndef illumos) in our CTF tools? I.e., is there an active upstream here?

[markj]

cddl/contrib/opensolaris/tools/ctf/cvt/merge.c

455

Not really. At least, in the past I haven't bothered delimiting our modifications unless they were specific to FreeBSD.

481

ISCHILD is kind of a weird predicate to use, but I can't see a nicer way to express it using ctf.h macros. You might add a comment explaining why we do these checks.

[bdrewery]

Wasn't intended to be pushed yet.

[markj]

FWIW, with CTFv3 landed I think this revision is obsolete.

[bdrewery]

@markj Great, thanks!