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libctf: library version enforcement 

This old Solaris standard allows callers to specify that they are
expecting one particular API and/or CTF file format from the library.

libctf/
	* ctf-impl.h (_libctf_version): New declaration.
	* ctf-subr.c (_libctf_version): Define it.
	(ctf_version): New.

include/
	* ctf-api.h (ctf_version): New.
This commit is contained in:
Nick Alcock 2019-04-24 11:26:42 +01:00
parent c499eb6896
commit 6c33b742ce
5 changed files with 39 additions and 0 deletions
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4
include/ChangeLog
View File

@ -1,3 +1,7 @@
2019-05-28 Nick Alcock <nick.alcock@oracle.com>
* ctf-api.h (ctf_version): New.
2019-05-28 Nick Alcock <nick.alcock@oracle.com>
* ctf-api.h (ctf_func_info): New.

1
include/ctf-api.h
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@ -269,6 +269,7 @@ extern void *ctf_getspecific (ctf_file_t *);
extern int ctf_errno (ctf_file_t *);
extern const char *ctf_errmsg (int);
extern int ctf_version (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 *);

6
libctf/ChangeLog
View File

@ -1,3 +1,9 @@
2019-05-28 Nick Alcock <nick.alcock@oracle.com>
* ctf-impl.h (_libctf_version): New declaration.
* ctf-subr.c (_libctf_version): Define it.
(ctf_version): New.
2019-05-28 Nick Alcock <nick.alcock@oracle.com>
* ctf-create.c (enumcmp): New.

1
libctf/ctf-impl.h
View File

@ -375,6 +375,7 @@ extern const char *ctf_lookup_symbol_name (ctf_file_t *fp, unsigned long symidx)
extern const char _CTF_SECTION[]; /* name of CTF ELF section */
extern const char _CTF_NULLSTR[]; /* empty string */
extern int _libctf_version; /* library client version */
extern int _libctf_debug; /* debugging messages enabled */
#ifdef __cplusplus

27
libctf/ctf-subr.c
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@ -27,6 +27,7 @@
#include <unistd.h>
static size_t _PAGESIZE _libctf_unused_;
int _libctf_version = CTF_VERSION; /* Library client version. */
int _libctf_debug = 0; /* Debugging messages enabled. */
_libctf_malloc_ void *
@ -190,6 +191,32 @@ ctf_strerror (int err)
return (const char *) (strerror (err));
}
/* Set the CTF library client version to the specified version. If version is
zero, we just return the default library version number. */
int
ctf_version (int version)
{
if (version < 0)
{
errno = EINVAL;
return -1;
}
if (version > 0)
{
/* Dynamic version switching is not presently supported. */
if (version != CTF_VERSION)
{
errno = ENOTSUP;
return -1;
}
ctf_dprintf ("ctf_version: client using version %d\n", version);
_libctf_version = version;
}
return _libctf_version;
}
void
libctf_init_debug (void)
{