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Diffstat (limited to 'usr/src/uts/common/dtrace/dtrace.c')
-rw-r--r--usr/src/uts/common/dtrace/dtrace.c59
1 files changed, 42 insertions, 17 deletions
diff --git a/usr/src/uts/common/dtrace/dtrace.c b/usr/src/uts/common/dtrace/dtrace.c
index 91e3230737..00e71888cd 100644
--- a/usr/src/uts/common/dtrace/dtrace.c
+++ b/usr/src/uts/common/dtrace/dtrace.c
@@ -20,7 +20,7 @@
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
@@ -239,10 +239,16 @@ static void
dtrace_nullop(void)
{}
+static int
+dtrace_enable_nullop(void)
+{
+ return (0);
+}
+
static dtrace_pops_t dtrace_provider_ops = {
(void (*)(void *, const dtrace_probedesc_t *))dtrace_nullop,
(void (*)(void *, struct modctl *))dtrace_nullop,
- (void (*)(void *, dtrace_id_t, void *))dtrace_nullop,
+ (int (*)(void *, dtrace_id_t, void *))dtrace_enable_nullop,
(void (*)(void *, dtrace_id_t, void *))dtrace_nullop,
(void (*)(void *, dtrace_id_t, void *))dtrace_nullop,
(void (*)(void *, dtrace_id_t, void *))dtrace_nullop,
@@ -426,6 +432,7 @@ dtrace_load##bits(uintptr_t addr) \
#define DTRACE_DYNHASH_SINK 1
#define DTRACE_DYNHASH_VALID 2
+#define DTRACE_MATCH_FAIL -1
#define DTRACE_MATCH_NEXT 0
#define DTRACE_MATCH_DONE 1
#define DTRACE_ANCHORED(probe) ((probe)->dtpr_func[0] != '\0')
@@ -6654,7 +6661,7 @@ dtrace_match(const dtrace_probekey_t *pkp, uint32_t priv, uid_t uid,
{
dtrace_probe_t template, *probe;
dtrace_hash_t *hash = NULL;
- int len, best = INT_MAX, nmatched = 0;
+ int len, rc, best = INT_MAX, nmatched = 0;
dtrace_id_t i;
ASSERT(MUTEX_HELD(&dtrace_lock));
@@ -6666,7 +6673,8 @@ dtrace_match(const dtrace_probekey_t *pkp, uint32_t priv, uid_t uid,
if (pkp->dtpk_id != DTRACE_IDNONE) {
if ((probe = dtrace_probe_lookup_id(pkp->dtpk_id)) != NULL &&
dtrace_match_probe(probe, pkp, priv, uid, zoneid) > 0) {
- (void) (*matched)(probe, arg);
+ if ((*matched)(probe, arg) == DTRACE_MATCH_FAIL)
+ return (DTRACE_MATCH_FAIL);
nmatched++;
}
return (nmatched);
@@ -6713,8 +6721,12 @@ dtrace_match(const dtrace_probekey_t *pkp, uint32_t priv, uid_t uid,
nmatched++;
- if ((*matched)(probe, arg) != DTRACE_MATCH_NEXT)
+ if ((rc = (*matched)(probe, arg)) !=
+ DTRACE_MATCH_NEXT) {
+ if (rc == DTRACE_MATCH_FAIL)
+ return (DTRACE_MATCH_FAIL);
break;
+ }
}
return (nmatched);
@@ -6733,8 +6745,11 @@ dtrace_match(const dtrace_probekey_t *pkp, uint32_t priv, uid_t uid,
nmatched++;
- if ((*matched)(probe, arg) != DTRACE_MATCH_NEXT)
+ if ((rc = (*matched)(probe, arg)) != DTRACE_MATCH_NEXT) {
+ if (rc == DTRACE_MATCH_FAIL)
+ return (DTRACE_MATCH_FAIL);
break;
+ }
}
return (nmatched);
@@ -6954,7 +6969,7 @@ dtrace_unregister(dtrace_provider_id_t id)
dtrace_probe_t *probe, *first = NULL;
if (old->dtpv_pops.dtps_enable ==
- (void (*)(void *, dtrace_id_t, void *))dtrace_nullop) {
+ (int (*)(void *, dtrace_id_t, void *))dtrace_enable_nullop) {
/*
* If DTrace itself is the provider, we're called with locks
* already held.
@@ -7100,7 +7115,7 @@ dtrace_invalidate(dtrace_provider_id_t id)
dtrace_provider_t *pvp = (dtrace_provider_t *)id;
ASSERT(pvp->dtpv_pops.dtps_enable !=
- (void (*)(void *, dtrace_id_t, void *))dtrace_nullop);
+ (int (*)(void *, dtrace_id_t, void *))dtrace_enable_nullop);
mutex_enter(&dtrace_provider_lock);
mutex_enter(&dtrace_lock);
@@ -7141,7 +7156,7 @@ dtrace_condense(dtrace_provider_id_t id)
* Make sure this isn't the dtrace provider itself.
*/
ASSERT(prov->dtpv_pops.dtps_enable !=
- (void (*)(void *, dtrace_id_t, void *))dtrace_nullop);
+ (int (*)(void *, dtrace_id_t, void *))dtrace_enable_nullop);
mutex_enter(&dtrace_provider_lock);
mutex_enter(&dtrace_lock);
@@ -9095,7 +9110,7 @@ dtrace_ecb_add(dtrace_state_t *state, dtrace_probe_t *probe)
return (ecb);
}
-static void
+static int
dtrace_ecb_enable(dtrace_ecb_t *ecb)
{
dtrace_probe_t *probe = ecb->dte_probe;
@@ -9108,7 +9123,7 @@ dtrace_ecb_enable(dtrace_ecb_t *ecb)
/*
* This is the NULL probe -- there's nothing to do.
*/
- return;
+ return (0);
}
if (probe->dtpr_ecb == NULL) {
@@ -9122,8 +9137,8 @@ dtrace_ecb_enable(dtrace_ecb_t *ecb)
if (ecb->dte_predicate != NULL)
probe->dtpr_predcache = ecb->dte_predicate->dtp_cacheid;
- prov->dtpv_pops.dtps_enable(prov->dtpv_arg,
- probe->dtpr_id, probe->dtpr_arg);
+ return (prov->dtpv_pops.dtps_enable(prov->dtpv_arg,
+ probe->dtpr_id, probe->dtpr_arg));
} else {
/*
* This probe is already active. Swing the last pointer to
@@ -9136,6 +9151,7 @@ dtrace_ecb_enable(dtrace_ecb_t *ecb)
probe->dtpr_predcache = 0;
dtrace_sync();
+ return (0);
}
}
@@ -9919,7 +9935,9 @@ dtrace_ecb_create_enable(dtrace_probe_t *probe, void *arg)
if ((ecb = dtrace_ecb_create(state, probe, enab)) == NULL)
return (DTRACE_MATCH_DONE);
- dtrace_ecb_enable(ecb);
+ if (dtrace_ecb_enable(ecb) < 0)
+ return (DTRACE_MATCH_FAIL);
+
return (DTRACE_MATCH_NEXT);
}
@@ -10714,7 +10732,7 @@ static int
dtrace_enabling_match(dtrace_enabling_t *enab, int *nmatched)
{
int i = 0;
- int matched = 0;
+ int total_matched = 0, matched = 0;
ASSERT(MUTEX_HELD(&cpu_lock));
ASSERT(MUTEX_HELD(&dtrace_lock));
@@ -10725,7 +10743,14 @@ dtrace_enabling_match(dtrace_enabling_t *enab, int *nmatched)
enab->dten_current = ep;
enab->dten_error = 0;
- matched += dtrace_probe_enable(&ep->dted_probe, enab);
+ /*
+ * If a provider failed to enable a probe then get out and
+ * let the consumer know we failed.
+ */
+ if ((matched = dtrace_probe_enable(&ep->dted_probe, enab)) < 0)
+ return (EBUSY);
+
+ total_matched += matched;
if (enab->dten_error != 0) {
/*
@@ -10753,7 +10778,7 @@ dtrace_enabling_match(dtrace_enabling_t *enab, int *nmatched)
enab->dten_probegen = dtrace_probegen;
if (nmatched != NULL)
- *nmatched = matched;
+ *nmatched = total_matched;
return (0);
}
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-31 00:02:36 +0000