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libctf: lookups by name and symbol

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These functions allow you to look up types given a name in a simple
subset of C declarator syntax (no function pointers), to look up the
types of variables given a name, and to look up the types of data
objects and the type signatures of functions given symbol table offsets.

(Despite its name, one function in this commit, ctf_lookup_symbol_name(),
is for the internal use of libctf only, and does not appear in any
public header files.)

libctf/
	* ctf-lookup.c (isqualifier): New.
	(ctf_lookup_by_name): Likewise.
	(struct ctf_lookup_var_key): Likewise.
	(ctf_lookup_var): Likewise.
	(ctf_lookup_variable): Likewise.
	(ctf_lookup_symbol_name): Likewise.
	(ctf_lookup_by_symbol): Likewise.
	(ctf_func_info): Likewise.
	(ctf_func_args): Likewise.

include/
	* ctf-api.h (ctf_func_info): New.
	(ctf_func_args): Likewise.
	(ctf_lookup_by_symbol): Likewise.
	(ctf_lookup_by_symbol): Likewise.
	(ctf_lookup_variable): Likewise.
This commit is contained in:
Nick Alcock
2019-04-24 11:15:33 +01:00
parent 316afdb130
commit b437bfe0f4
5 changed files with 392 additions and 0 deletions
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7
include/ctf-api.h
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@ -270,6 +270,13 @@ extern void *ctf_getspecific (ctf_file_t *);
extern int ctf_errno (ctf_file_t *);
extern const char *ctf_errmsg (int);
extern int ctf_func_info (ctf_file_t *, unsigned long, ctf_funcinfo_t *);
extern int ctf_func_args (ctf_file_t *, unsigned long, uint32_t, ctf_id_t *);
extern ctf_id_t ctf_lookup_by_name (ctf_file_t *, const char *);
extern ctf_id_t ctf_lookup_by_symbol (ctf_file_t *, unsigned long);
extern ctf_id_t ctf_lookup_variable (ctf_file_t *, const char *);
extern ctf_id_t ctf_type_resolve (ctf_file_t *, ctf_id_t);
extern char *ctf_type_aname (ctf_file_t *, ctf_id_t);
extern ssize_t ctf_type_lname (ctf_file_t *, ctf_id_t, char *, size_t);