1 /*
   2  * This file and its contents are supplied under the terms of the
   3  * Common Development and Distribution License ("CDDL"), version 1.0.
   4  * You may only use this file in accordance with the terms of version
   5  * 1.0 of the CDDL.
   6  *
   7  * A full copy of the text of the CDDL should have accompanied this
   8  * source.  A copy of the CDDL is also available via the Internet at
   9  * http://www.illumos.org/license/CDDL.
  10  */
  11 
  12 /*
  13  * Copyright 2019 Joyent, Inc.
  14  */
  15 
  16 #include <mdb/mdb_modapi.h>
  17 #include <mdb/mdb_ks.h>
  18 #include <sys/refstr.h>
  19 
  20 #define REFSTR_LEN (1024)
  21 
  22 int
  23 cmd_refstr(uintptr_t addr, uint_t flags __unused,
  24     int argc, const mdb_arg_t *argv)
  25 {
  26         if (!(flags & DCMD_ADDRSPEC)) {
  27                 mdb_warn("address is required\n");
  28                 return (DCMD_ERR);
  29         }
  30 
  31         if (mdb_getopts(argc, argv, NULL) != argc)
  32                 return (DCMD_USAGE);
  33 
  34         char *buf = mdb_alloc(REFSTR_LEN, UM_SLEEP | UM_GC);
  35 
  36         if (mdb_read_refstr(addr, buf, REFSTR_LEN) < 0) {
  37                 mdb_warn("couldn't read refstr from %p", addr);
  38                 return (DCMD_ERR);
  39         }
  40 
  41         mdb_printf("%s\n", buf);
  42         return (DCMD_OK);
  43 }