int
audit_objopen(Rt_map *clmp, Rt_map *nlmp)
{
Lmid_t lmid = get_linkmap_id(LIST(nlmp));
int appl = 0, respond = 1, ndx = 0;
uint_t clients = 0;
Audit_info * aip;
/*
* Determine the total number of audit libraries in use. This provides
* the number of client structures required for this object.
*/
if (auditors)
clients = auditors->ad_cnt;
if (AUDITORS(clmp))
clients += AUDITORS(clmp)->ad_cnt;
if ((nlmp != clmp) && AUDITORS(nlmp))
clients += AUDITORS(nlmp)->ad_cnt;
/*
* The initial allocation of the audit information structure includes
* an array of audit clients, 1 per audit library presently available.
*
* ---------------
* | ai_cnt |
* Audit_info | ai_clients |-------
* | ai_dynplts | |
* |---------------| |
* Audit_client | 1 |<------
* |---------------|
* | 2 |
* .........
*/
if ((AUDINFO(nlmp) = aip = calloc(1, sizeof (Audit_info) +
(sizeof (Audit_client) * clients))) == 0)
return (0);
aip->ai_cnt = clients;
aip->ai_clients = (Audit_client *)((uintptr_t)aip +
sizeof (Audit_info));
if ((rtld_flags & RT_FL_APPLIC) == 0)
appl = rtld_flags |= RT_FL_APPLIC;
if (auditors)
respond = _audit_objopen(&(auditors->ad_list), nlmp,
lmid, aip, &ndx);
if (respond && AUDITORS(clmp))
respond = _audit_objopen(&(AUDITORS(clmp)->ad_list), nlmp,
lmid, aip, &ndx);
if (respond && (nlmp != clmp) && AUDITORS(nlmp))
respond = _audit_objopen(&(AUDITORS(nlmp)->ad_list), nlmp,
lmid, aip, &ndx);
if (appl)
rtld_flags &= ~RT_FL_APPLIC;
return (respond);
}
int
audit_objopen(Rt_map *clmp, Rt_map *nlmp)
{
Lmid_t lmid = get_linkmap_id(LIST(nlmp));
int respond = 1, ndx = 0;
uint_t rtldflags;
uint_t clients = 0;
Audit_info *aip;
if (rt_critical())
return (respond);
/*
* Determine the number of auditors that can receive information
* regarding this object. This provides the number of client
* structures required for this object.
*/
if (auditors)
clients = auditors->ad_cnt;
if (AUDITORS(clmp))
clients += AUDITORS(clmp)->ad_cnt;
if ((nlmp != clmp) && AUDITORS(nlmp))
clients += AUDITORS(nlmp)->ad_cnt;
/*
* Allocate an audit information structure. Each audited object
* maintains a AUDINFO() structure. As this structure can only be
* created once all auditors are loaded, a client count can now be
* computed.
*
* The allocation of the audit information structure includes an array
* of audit clients, 1 per audit library that has been loaded.
*
* ---------------
* | ai_cnt |
* Audit_info | ai_clients |-------
* | ai_dynplts | |
* |---------------| |
* Audit_client | 1 |<------
* |---------------|
* | 2 |
* .........
*/
if ((AUDINFO(nlmp) = aip = calloc(1, sizeof (Audit_info) +
(sizeof (Audit_client) * clients))) == NULL)
return (0);
aip->ai_cnt = clients;
aip->ai_clients = (Audit_client *)((uintptr_t)aip +
sizeof (Audit_info));
APPLICATION_ENTER(rtldflags);
if (auditors)
respond = _audit_objopen(auditors->ad_list, nlmp,
lmid, aip, &ndx);
if (respond && AUDITORS(clmp))
respond = _audit_objopen(AUDITORS(clmp)->ad_list, nlmp,
lmid, aip, &ndx);
if (respond && (nlmp != clmp) && AUDITORS(nlmp))
respond = _audit_objopen(AUDITORS(nlmp)->ad_list, nlmp,
lmid, aip, &ndx);
APPLICATION_RETURN(rtldflags);
return (respond);
}
/*
* la_objopen() caller for the head link-map. Global auditors, or an auditor
* started from the object that heads a link-map list (typically the dynamic
* executable), are passed to la_objopen(). However, local auditors can
* provide activity and preinit events, and for these events, a cookie
* representing the head link-map list object is expected. This routine obtains
* these cookies from the link-map list lm_cookies element. This element
* ensures all clients of the same auditor use the same cookie.
*
* Although a local auditor will get an la_objopen() call for the object that
* heads the link-map list of the object being audited, the auditor is not
* permitted to request binding information for this head object. The head
* object has already been in existence, and bindings may have been resolved
* with it. This local auditor is coming into existence too late, and thus we
* don't allow any bindings to be caught at all.
*/
static int
_audit_add_head(Rt_map *clmp, Rt_map *hlmp, int preinit, int activity)
{
Lm_list *clml = LIST(clmp);
Lmid_t lmid = get_linkmap_id(clml);
Audit_list *alp;
Aliste idx;
int save = 0;
for (APLIST_TRAVERSE(AUDITORS(clmp)->ad_list, idx, alp)) {
Audit_client *acp;
Rt_map *almp = alp->al_lmp;
Lm_list *alml = LIST(almp);
uintptr_t *cookie;
uint_t rtldflags;
/*
* Ensure this local auditor isn't already in existence as an
* auditor for the head of the link-map list. If it is, then
* this auditor will have already receive preinit and activity
* events.
*/
if (AUDITORS(hlmp) && _audit_used_by_head(hlmp, almp))
continue;
/*
* Create a cookie that represents the object that heads the
* link-map list. If the cookie already exists, then this
* auditor has already been established for another objects
* local auditing. In this case, do not issue a la_objopen()
* or la_activity() event, as these will have already occurred.
*/
if ((acp = _audit_get_head_client(clml->lm_head, almp)) != NULL)
continue;
if ((acp =
_audit_create_head_client(clml->lm_head, almp)) == NULL)
return (0);
cookie = &(acp->ac_cookie);
save++;
/*
* Call the la_objopen() if available.
*/
if (alp->al_objopen) {
uint_t flags;
DBG_CALL(Dbg_audit_objopen(clml, DBG_AUD_CALL,
alp->al_libname, NAME(hlmp), 0, FALSE));
APPLICATION_ENTER(rtldflags);
leave(alml, thr_flg_reenter);
flags = (*alp->al_objopen)((Link_map *)hlmp, lmid,
cookie);
(void) enter(thr_flg_reenter);
APPLICATION_RETURN(rtldflags);
if (flags) {
DBG_CALL(Dbg_audit_objopen(clml, DBG_AUD_RET,
alp->al_libname, NAME(hlmp), flags, TRUE));
}
}
/*
* Call the la_activity() if available.
*/
if (alp->al_activity) {
alml->lm_flags |= LML_FLG_AUDITNOTIFY;
clml->lm_flags |= LML_FLG_ACTAUDIT;
DBG_CALL(Dbg_audit_activity(clml, alp->al_libname,
NAME(clml->lm_head), LA_ACT_ADD));
APPLICATION_ENTER(rtldflags);
leave(alml, thr_flg_reenter);
(*alp->al_activity)(cookie, LA_ACT_ADD);
(void) enter(thr_flg_reenter);
APPLICATION_RETURN(rtldflags);
}
}
/*
* If new head link-map cookies have been generated, then maintain
* any preinit and/or activity requirements.
*/
if (save) {
if (preinit && (aplist_append(&aud_preinit, clmp,
AL_CNT_AUDITORS) == NULL))
return (0);
if (activity && (aplist_append(&aud_activity, clmp,
AL_CNT_AUDITORS) == NULL))
return (0);
}
return (1);
}
