12259 CTF shouldn't assume enum size

@@ -8,11 +8,11 @@
  * source.  A copy of the CDDL is also available via the Internet at
  * http://www.illumos.org/license/CDDL.
  */
 
 /*
- * Copyright (c) 2019, Joyent, Inc.
+ * Copyright 2020 Joyent, Inc.
  */
 
 #include <stdint.h>
 
 /*

@@ -70,5 +70,35 @@
 } chrono_t;
 
 enum ff6 ff6;
 ff10_t ff10;
 chrono_t trigger;
+
+/*
+ * Normally enums are integer-sized, but a packed enum is a counter-example, as
+ * is something like trace_alloc_type_t which can't fit in an int.
+ */
+
+enum char_enum {
+        CE1,
+        CE2
+} __attribute__((packed)) ce;
+
+enum short_enum {
+        SE1,
+        SE2,
+        SE3 = 255,
+        SE4 = 256,
+        SE5 = 257
+} __attribute__((packed)) se;
+
+enum int_enum {
+        IE1,
+        IE2,
+        IE3 = 256,
+        IE4 = 257
+} ie;
+
+enum ll_enum {
+        LLE1 = -1ULL,
+        LLE2 = -2ULL,
+} lle;