Index: cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c
===================================================================
--- cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c
+++ cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c
@@ -315,6 +315,12 @@
 	DT_VERS_1_5, &dt_idops_func, "string(int, void *)" },
 { "ipl", DT_IDENT_SCALAR, 0, DIF_VAR_IPL, DT_ATTR_STABCMN, DT_VERS_1_0,
 	&dt_idops_type, "uint_t" },
+#ifdef __FreeBSD__
+{ "jailname", DT_IDENT_SCALAR, 0, DIF_VAR_JAILNAME,
+	DT_ATTR_STABCMN, DT_VERS_1_13, &dt_idops_type, "string" },
+{ "jid", DT_IDENT_SCALAR, 0, DIF_VAR_JID, DT_ATTR_STABCMN, DT_VERS_1_13,
+	&dt_idops_type, "uint_t" },
+#endif
 { "json", DT_IDENT_FUNC, 0, DIF_SUBR_JSON, DT_ATTR_STABCMN, DT_VERS_1_11,
 	&dt_idops_func, "string(const char *, const char *)" },
 { "jstack", DT_IDENT_ACTFUNC, 0, DT_ACT_JSTACK, DT_ATTR_STABCMN, DT_VERS_1_0,
@@ -534,10 +540,8 @@
 { "walltimestamp", DT_IDENT_SCALAR, 0, DIF_VAR_WALLTIMESTAMP,
 	DT_ATTR_STABCMN, DT_VERS_1_0,
 	&dt_idops_type, "int64_t" },
-#ifdef illumos
 { "zonename", DT_IDENT_SCALAR, 0, DIF_VAR_ZONENAME,
 	DT_ATTR_STABCMN, DT_VERS_1_0, &dt_idops_type, "string" },
-#endif
 
 #ifndef illumos
 { "cpu", DT_IDENT_SCALAR, 0, DIF_VAR_CPU,
Index: sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
===================================================================
--- sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
+++ sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
@@ -3689,6 +3689,20 @@
 		return (dtrace_dif_varstr(
 		    (uintptr_t)curthread->t_procp->p_zone->zone_name,
 		    state, mstate));
+#elif defined(__FreeBSD__)
+	case DIF_VAR_JAILNAME:
+		if (!dtrace_priv_kernel(state))
+			return (0);
+
+		return (dtrace_dif_varstr(
+		    (uintptr_t)curthread->t_procp->p_ucred->cr_prison->pr_name,
+		    state, mstate));
+
+	case DIF_VAR_JID:
+		if (!dtrace_priv_kernel(state))
+			return (0);
+
+		return ((uint64_t)curthread->t_procp->p_ucred->cr_prison->pr_id);
 #else
 		return (0);
 #endif
Index: sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h
===================================================================
--- sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h
+++ sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h
@@ -254,6 +254,8 @@
 #define	DIF_VAR_GID		0x011f	/* process group ID */
 #define	DIF_VAR_ERRNO		0x0120	/* thread errno */
 #define	DIF_VAR_EXECARGS	0x0121	/* process arguments */
+#define	DIF_VAR_JID		0x0122	/* process jail id */
+#define	DIF_VAR_JAILNAME	0x0123	/* process jail name */
 
 #ifndef illumos
 #define	DIF_VAR_CPU		0x0200