diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_dof.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_dof.c
index 5442683..0b531c5 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_dof.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_dof.c
@@ -469,7 +469,7 @@ dof_add_probe(dt_idhash_t *dhp, dt_ident_t *idp, void *data)
 		 * locally so an alternate symbol is added for the purpose
 		 * of this relocation.
 		 */
-		if (pip->pi_rname[0] == '\0')
+		if (pip->pi_rname == NULL)
 			dofr.dofr_name = dofpr.dofpr_func;
 		else
 			dofr.dofr_name = dof_add_string(ddo, pip->pi_rname);
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_provider.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_provider.c
index 0f1bfe0..6acb86b 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_provider.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_provider.c
@@ -520,6 +520,8 @@ dt_probe_destroy(dt_probe_t *prp)
 
 	for (pip = prp->pr_inst; pip != NULL; pip = pip_next) {
 		pip_next = pip->pi_next;
+		dt_free(dtp, pip->pi_rname);
+		dt_free(dtp, pip->pi_fname);
 		dt_free(dtp, pip->pi_offs);
 		dt_free(dtp, pip->pi_enoffs);
 		dt_free(dtp, pip);
@@ -552,28 +554,18 @@ dt_probe_define(dt_provider_t *pvp, dt_probe_t *prp,
 		if ((pip = dt_zalloc(dtp, sizeof (*pip))) == NULL)
 			return (-1);
 
-		if ((pip->pi_offs = dt_zalloc(dtp,
-		    sizeof (uint32_t))) == NULL) {
-			dt_free(dtp, pip);
-			return (-1);
-		}
+		if ((pip->pi_offs = dt_zalloc(dtp, sizeof (uint32_t))) == NULL)
+			goto nomem;
 
 		if ((pip->pi_enoffs = dt_zalloc(dtp,
-		    sizeof (uint32_t))) == NULL) {
-			dt_free(dtp, pip->pi_offs);
-			dt_free(dtp, pip);
-			return (-1);
-		}
+		    sizeof (uint32_t))) == NULL)
+			goto nomem;
 
-		(void) strlcpy(pip->pi_fname, fname, sizeof (pip->pi_fname));
-		if (rname != NULL) {
-			if (strlen(rname) + 1 > sizeof (pip->pi_rname)) {
-				dt_free(dtp, pip->pi_offs);
-				dt_free(dtp, pip);
-				return (dt_set_errno(dtp, EDT_COMPILER));
-			}
-			(void) strcpy(pip->pi_rname, rname);
-		}
+		if ((pip->pi_fname = strdup(fname)) == NULL)
+			goto nomem;
+
+		if (rname != NULL && (pip->pi_rname = strdup(rname)) == NULL)
+			goto nomem;
 
 		pip->pi_noffs = 0;
 		pip->pi_maxoffs = 1;
@@ -618,6 +610,13 @@ dt_probe_define(dt_provider_t *pvp, dt_probe_t *prp,
 	(*offs)[(*noffs)++] = offset;
 
 	return (0);
+
+nomem:
+	dt_free(dtp, pip->pi_fname);
+	dt_free(dtp, pip->pi_enoffs);
+	dt_free(dtp, pip->pi_offs);
+	dt_free(dtp, pip);
+	return (dt_set_errno(dtp, EDT_NOMEM));
 }
 
 /*
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_provider.h b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_provider.h
index af4ec33..2752baa 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_provider.h
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_provider.h
@@ -64,8 +64,8 @@ typedef struct dt_probe_iter {
 } dt_probe_iter_t;
 
 typedef struct dt_probe_instance {
-	char pi_fname[DTRACE_FUNCNAMELEN]; /* function name */
-	char pi_rname[DTRACE_FUNCNAMELEN + 20]; /* mangled relocation name */
+	char *pi_fname;			/* function name */
+	char *pi_rname;			/* mangled relocation name */
 	uint32_t *pi_offs;		/* offsets into the function */
 	uint32_t *pi_enoffs;		/* is-enabled offsets */
 	uint_t pi_noffs;		/* number of offsets */