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ctfc: add function to lookup CTF ID of a TREE type

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Add a new function, ctf_lookup_tree_type, to return the CTF type ID
associated with a type via its is TREE node. The function is exposed via
a prototype in ctfc.h.

gcc/ChangeLog:

	* ctfc.c (ctf_lookup_tree_type): New function.
	* ctfc.h: Likewise.
This commit is contained in:
David Faust 2021-08-03 10:01:31 -07:00
parent 44e4ed6a3c
commit 5b723401b3
2 changed files with 18 additions and 0 deletions
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16
gcc/ctfc.c
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@ -791,6 +791,22 @@ ctf_add_sou (ctf_container_ref ctfc, uint32_t flag, const char * name,
return type;
}
/* Given a TREE_TYPE node, return the CTF type ID for that type. */
ctf_id_t
ctf_lookup_tree_type (ctf_container_ref ctfc, const tree type)
{
dw_die_ref die = lookup_type_die (type);
if (die == NULL)
return CTF_NULL_TYPEID;
ctf_dtdef_ref dtd = ctf_dtd_lookup (ctfc, die);
if (dtd == NULL)
return CTF_NULL_TYPEID;
return dtd->dtd_type;
}
/* Check if CTF for TYPE has already been generated. Mainstay for
de-duplication. If CTF type already exists, returns TRUE and updates
the TYPE_ID for the caller. */

2
gcc/ctfc.h
View file

@ -430,6 +430,8 @@ extern int ctf_add_function_arg (ctf_container_ref, dw_die_ref,
extern int ctf_add_variable (ctf_container_ref, const char *, ctf_id_t,
dw_die_ref, unsigned int);
extern ctf_id_t ctf_lookup_tree_type (ctf_container_ref, const tree);
/* CTF section does not emit location information; at this time, location
information is needed for BTF CO-RE use-cases. */