libdtrace/common/dt_open.c

	dt_open.c revision 4edabff493bc4820f4297f981943f11de1cbf3be
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/types.h>
#include <sys/modctl.h>
#include <sys/systeminfo.h>
#include <sys/resource.h>

#include <libelf.h>
#include <strings.h>
#include <alloca.h>
#include <limits.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <assert.h>

#define _POSIX_PTHREAD_SEMANTICS
#include <dirent.h>
#undef  _POSIX_PTHREAD_SEMANTICS

#include <dt_impl.h>
#include <dt_program.h>
#include <dt_module.h>
#include <dt_printf.h>
#include <dt_string.h>
#include <dt_provider.h>

/*
 * Stability and versioning definitions.  These #defines are used in the tables
 * of identifiers below to fill in the attribute and version fields associated
 * with each identifier.  The DT_ATTR_* macros are a convenience to permit more
 * concise declarations of common attributes such as Stable/Stable/Common.  The
 * DT_VERS_* macros declare the encoded integer values of all versions used so
 * far.  DT_VERS_LATEST must correspond to the latest version value among all
 * versions exported by the D compiler.  DT_VERS_STRING must be an ASCII string
 * that contains DT_VERS_LATEST within it along with any suffixes (e.g. Beta).
 * You must update DT_VERS_LATEST and DT_VERS_STRING when adding a new version,
 * and then add the new version to the _dtrace_versions[] array declared below.
 * Refer to the Solaris Dynamic Tracing Guide Stability and Versioning chapters
 * respectively for an explanation of these DTrace features and their values.
 *
 * NOTE: Although the DTrace versioning scheme supports the labeling and
 *       introduction of incompatible changes (e.g. dropping an interface in a
 *       major release), the libdtrace code does not currently support this.
 *       All versions are assumed to strictly inherit from one another.  If
 *       we ever need to provide divergent interfaces, this will need work.
 */
#define DT_ATTR_STABCMN { DTRACE_STABILITY_STABLE, \
    DTRACE_STABILITY_STABLE, DTRACE_CLASS_COMMON }

#define DT_ATTR_EVOLCMN { DTRACE_STABILITY_EVOLVING, \
    DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON \
}

/*
 * The version number should be increased for every customer visible release
 * of Solaris. The major number should be incremented when a fundamental
 * change has been made that would affect all consumers, and would reflect
 * sweeping changes to DTrace or the D language. The minor number should be
 * incremented when a change is introduced that could break scripts that had
 * previously worked; for example, adding a new built-in variable could break
 * a script which was already using that identifier. The micro number should
 * be changed when introducing functionality changes or major bug fixes that
 * do not affect backward compatibility -- this is merely to make capabilities
 * easily determined from the version number. Minor bugs do not require any
 * modification to the version number.
 */
#define DT_VERS_1_0 DT_VERSION_NUMBER(1, 0, 0)
#define DT_VERS_1_1 DT_VERSION_NUMBER(1, 1, 0)
#define DT_VERS_1_2 DT_VERSION_NUMBER(1, 2, 0)
#define DT_VERS_1_2_1   DT_VERSION_NUMBER(1, 2, 1)
#define DT_VERS_1_2_2   DT_VERSION_NUMBER(1, 2, 2)
#define DT_VERS_1_3 DT_VERSION_NUMBER(1, 3, 0)
#define DT_VERS_1_4 DT_VERSION_NUMBER(1, 4, 0)
#define DT_VERS_1_4_1   DT_VERSION_NUMBER(1, 4, 1)
#define DT_VERS_LATEST  DT_VERS_1_4_1
#define DT_VERS_STRING  "Sun D 1.4.1"

const dt_version_t _dtrace_versions[] = {
    DT_VERS_1_0,    /* D API 1.0.0 (PSARC 2001/466) Solaris 10 FCS */
    DT_VERS_1_1,    /* D API 1.1.0 Solaris Express 6/05 */
    DT_VERS_1_2,    /* D API 1.2.0 Solaris 10 Update 1 */
    DT_VERS_1_2_1,  /* D API 1.2.1 Solaris Express 4/06 */
    DT_VERS_1_2_2,  /* D API 1.2.2 Solaris Express 6/06 */
    DT_VERS_1_3,    /* D API 1.3 Solaris Express 10/06 */
    DT_VERS_1_4,    /* D API 1.4 Solaris Express 2/07 */
    DT_VERS_1_4_1,  /* D API 1.4.1 Solaris Express 4/07 */
    0
};

/*
 * Table of global identifiers.  This is used to populate the global identifier
 * hash when a new dtrace client open occurs.  For more info see dt_ident.h.
 * The global identifiers that represent functions use the dt_idops_func ops
 * and specify the private data pointer as a prototype string which is parsed
 * when the identifier is first encountered.  These prototypes look like ANSI
 * C function prototypes except that the special symbol "@" can be used as a
 * wildcard to represent a single parameter of any type (i.e. any dt_node_t).
 * The standard "..." notation can also be used to represent varargs.  An empty
 * parameter list is taken to mean void (that is, no arguments are permitted).
 * A parameter enclosed in square brackets (e.g. "[int]") denotes an optional
 * argument.
 */
static const dt_ident_t _dtrace_globals[] = {
{ "alloca", DT_IDENT_FUNC, 0, DIF_SUBR_ALLOCA, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void *(size_t)" },
{ "arg0", DT_IDENT_SCALAR, 0, DIF_VAR_ARG0, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "int64_t" },
{ "arg1", DT_IDENT_SCALAR, 0, DIF_VAR_ARG1, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "int64_t" },
{ "arg2", DT_IDENT_SCALAR, 0, DIF_VAR_ARG2, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "int64_t" },
{ "arg3", DT_IDENT_SCALAR, 0, DIF_VAR_ARG3, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "int64_t" },
{ "arg4", DT_IDENT_SCALAR, 0, DIF_VAR_ARG4, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "int64_t" },
{ "arg5", DT_IDENT_SCALAR, 0, DIF_VAR_ARG5, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "int64_t" },
{ "arg6", DT_IDENT_SCALAR, 0, DIF_VAR_ARG6, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "int64_t" },
{ "arg7", DT_IDENT_SCALAR, 0, DIF_VAR_ARG7, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "int64_t" },
{ "arg8", DT_IDENT_SCALAR, 0, DIF_VAR_ARG8, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "int64_t" },
{ "arg9", DT_IDENT_SCALAR, 0, DIF_VAR_ARG9, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "int64_t" },
{ "args", DT_IDENT_ARRAY, 0, DIF_VAR_ARGS, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_args, NULL },
{ "avg", DT_IDENT_AGGFUNC, 0, DTRACEAGG_AVG, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(@)" },
{ "basename", DT_IDENT_FUNC, 0, DIF_SUBR_BASENAME, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "string(const char *)" },
{ "bcopy", DT_IDENT_FUNC, 0, DIF_SUBR_BCOPY, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(void *, void *, size_t)" },
{ "breakpoint", DT_IDENT_ACTFUNC, 0, DT_ACT_BREAKPOINT,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void()" },
{ "caller", DT_IDENT_SCALAR, 0, DIF_VAR_CALLER, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "uintptr_t" },
{ "chill", DT_IDENT_ACTFUNC, 0, DT_ACT_CHILL, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(int)" },
{ "cleanpath", DT_IDENT_FUNC, 0, DIF_SUBR_CLEANPATH, DT_ATTR_STABCMN,
    DT_VERS_1_0, &dt_idops_func, "string(const char *)" },
{ "clear", DT_IDENT_ACTFUNC, 0, DT_ACT_CLEAR, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(...)" },
{ "commit", DT_IDENT_ACTFUNC, 0, DT_ACT_COMMIT, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(int)" },
{ "copyin", DT_IDENT_FUNC, 0, DIF_SUBR_COPYIN, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void *(uintptr_t, size_t)" },
{ "copyinstr", DT_IDENT_FUNC, 0, DIF_SUBR_COPYINSTR,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "string(uintptr_t, [size_t])" },
{ "copyinto", DT_IDENT_FUNC, 0, DIF_SUBR_COPYINTO, DT_ATTR_STABCMN,
    DT_VERS_1_0, &dt_idops_func, "void(uintptr_t, size_t, void *)" },
{ "copyout", DT_IDENT_FUNC, 0, DIF_SUBR_COPYOUT, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(void *, uintptr_t, size_t)" },
{ "copyoutstr", DT_IDENT_FUNC, 0, DIF_SUBR_COPYOUTSTR,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(char *, uintptr_t, size_t)" },
{ "count", DT_IDENT_AGGFUNC, 0, DTRACEAGG_COUNT, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void()" },
{ "curthread", DT_IDENT_SCALAR, 0, DIF_VAR_CURTHREAD,
    { DTRACE_STABILITY_STABLE, DTRACE_STABILITY_PRIVATE,
    DTRACE_CLASS_COMMON }, DT_VERS_1_0,
    &dt_idops_type, "genunix`kthread_t *" },
{ "ddi_pathname", DT_IDENT_FUNC, 0, DIF_SUBR_DDI_PATHNAME,
    DT_ATTR_EVOLCMN, DT_VERS_1_0,
    &dt_idops_func, "string(void *, int64_t)" },
{ "denormalize", DT_IDENT_ACTFUNC, 0, DT_ACT_DENORMALIZE, DT_ATTR_STABCMN,
    DT_VERS_1_0, &dt_idops_func, "void(...)" },
{ "dirname", DT_IDENT_FUNC, 0, DIF_SUBR_DIRNAME, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "string(const char *)" },
{ "discard", DT_IDENT_ACTFUNC, 0, DT_ACT_DISCARD, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(int)" },
{ "epid", DT_IDENT_SCALAR, 0, DIF_VAR_EPID, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "uint_t" },
{ "errno", DT_IDENT_SCALAR, 0, DIF_VAR_ERRNO, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "int" },
{ "execname", DT_IDENT_SCALAR, 0, DIF_VAR_EXECNAME,
    DT_ATTR_STABCMN, DT_VERS_1_0, &dt_idops_type, "string" },
{ "exit", DT_IDENT_ACTFUNC, 0, DT_ACT_EXIT, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(int)" },
{ "freopen", DT_IDENT_ACTFUNC, 0, DT_ACT_FREOPEN, DT_ATTR_STABCMN,
    DT_VERS_1_1, &dt_idops_func, "void(@, ...)" },
{ "ftruncate", DT_IDENT_ACTFUNC, 0, DT_ACT_FTRUNCATE, DT_ATTR_STABCMN,
    DT_VERS_1_0, &dt_idops_func, "void()" },
{ "func", DT_IDENT_ACTFUNC, 0, DT_ACT_SYM, DT_ATTR_STABCMN,
    DT_VERS_1_2, &dt_idops_func, "_symaddr(uintptr_t)" },
{ "getmajor", DT_IDENT_FUNC, 0, DIF_SUBR_GETMAJOR,
    DT_ATTR_EVOLCMN, DT_VERS_1_0,
    &dt_idops_func, "genunix`major_t(genunix`dev_t)" },
{ "getminor", DT_IDENT_FUNC, 0, DIF_SUBR_GETMINOR,
    DT_ATTR_EVOLCMN, DT_VERS_1_0,
    &dt_idops_func, "genunix`minor_t(genunix`dev_t)" },
{ "htonl", DT_IDENT_FUNC, 0, DIF_SUBR_HTONL, DT_ATTR_EVOLCMN, DT_VERS_1_3,
    &dt_idops_func, "uint32_t(uint32_t)" },
{ "htonll", DT_IDENT_FUNC, 0, DIF_SUBR_HTONLL, DT_ATTR_EVOLCMN, DT_VERS_1_3,
    &dt_idops_func, "uint64_t(uint64_t)" },
{ "htons", DT_IDENT_FUNC, 0, DIF_SUBR_HTONS, DT_ATTR_EVOLCMN, DT_VERS_1_3,
    &dt_idops_func, "uint16_t(uint16_t)" },
{ "gid", DT_IDENT_SCALAR, 0, DIF_VAR_GID, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "gid_t" },
{ "id", DT_IDENT_SCALAR, 0, DIF_VAR_ID, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "uint_t" },
{ "index", DT_IDENT_FUNC, 0, DIF_SUBR_INDEX, DT_ATTR_STABCMN, DT_VERS_1_1,
    &dt_idops_func, "int(const char *, const char *, [int])" },
{ "inet_ntoa", DT_IDENT_FUNC, 0, DIF_SUBR_INET_NTOA, DT_ATTR_STABCMN,
    DT_VERS_1_0, &dt_idops_func, "string(ipaddr_t *)" },
{ "inet_ntoa6", DT_IDENT_FUNC, 0, DIF_SUBR_INET_NTOA6, DT_ATTR_STABCMN,
    DT_VERS_1_0, &dt_idops_func, "string(in6_addr_t *)" },
{ "inet_ntop", DT_IDENT_FUNC, 0, DIF_SUBR_INET_NTOP, DT_ATTR_STABCMN,
    DT_VERS_1_0, &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" },
{ "jstack", DT_IDENT_ACTFUNC, 0, DT_ACT_JSTACK, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "stack(...)" },
{ "lltostr", DT_IDENT_FUNC, 0, DIF_SUBR_LLTOSTR, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "string(int64_t)" },
{ "lquantize", DT_IDENT_AGGFUNC, 0, DTRACEAGG_LQUANTIZE,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(@, int32_t, int32_t, ...)" },
{ "max", DT_IDENT_AGGFUNC, 0, DTRACEAGG_MAX, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(@)" },
{ "min", DT_IDENT_AGGFUNC, 0, DTRACEAGG_MIN, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(@)" },
{ "mod", DT_IDENT_ACTFUNC, 0, DT_ACT_MOD, DT_ATTR_STABCMN,
    DT_VERS_1_2, &dt_idops_func, "_symaddr(uintptr_t)" },
{ "msgdsize", DT_IDENT_FUNC, 0, DIF_SUBR_MSGDSIZE,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "size_t(mblk_t *)" },
{ "msgsize", DT_IDENT_FUNC, 0, DIF_SUBR_MSGSIZE,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "size_t(mblk_t *)" },
{ "mutex_owned", DT_IDENT_FUNC, 0, DIF_SUBR_MUTEX_OWNED,
    DT_ATTR_EVOLCMN, DT_VERS_1_0,
    &dt_idops_func, "int(genunix`kmutex_t *)" },
{ "mutex_owner", DT_IDENT_FUNC, 0, DIF_SUBR_MUTEX_OWNER,
    DT_ATTR_EVOLCMN, DT_VERS_1_0,
    &dt_idops_func, "genunix`kthread_t *(genunix`kmutex_t *)" },
{ "mutex_type_adaptive", DT_IDENT_FUNC, 0, DIF_SUBR_MUTEX_TYPE_ADAPTIVE,
    DT_ATTR_EVOLCMN, DT_VERS_1_0,
    &dt_idops_func, "int(genunix`kmutex_t *)" },
{ "mutex_type_spin", DT_IDENT_FUNC, 0, DIF_SUBR_MUTEX_TYPE_SPIN,
    DT_ATTR_EVOLCMN, DT_VERS_1_0,
    &dt_idops_func, "int(genunix`kmutex_t *)" },
{ "ntohl", DT_IDENT_FUNC, 0, DIF_SUBR_NTOHL, DT_ATTR_EVOLCMN, DT_VERS_1_3,
    &dt_idops_func, "uint32_t(uint32_t)" },
{ "ntohll", DT_IDENT_FUNC, 0, DIF_SUBR_NTOHLL, DT_ATTR_EVOLCMN, DT_VERS_1_3,
    &dt_idops_func, "uint64_t(uint64_t)" },
{ "ntohs", DT_IDENT_FUNC, 0, DIF_SUBR_NTOHS, DT_ATTR_EVOLCMN, DT_VERS_1_3,
    &dt_idops_func, "uint16_t(uint16_t)" },
{ "normalize", DT_IDENT_ACTFUNC, 0, DT_ACT_NORMALIZE, DT_ATTR_STABCMN,
    DT_VERS_1_0, &dt_idops_func, "void(...)" },
{ "panic", DT_IDENT_ACTFUNC, 0, DT_ACT_PANIC, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void()" },
{ "pid", DT_IDENT_SCALAR, 0, DIF_VAR_PID, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "pid_t" },
{ "ppid", DT_IDENT_SCALAR, 0, DIF_VAR_PPID, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "pid_t" },
{ "printa", DT_IDENT_ACTFUNC, 0, DT_ACT_PRINTA, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(@, ...)" },
{ "printf", DT_IDENT_ACTFUNC, 0, DT_ACT_PRINTF, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(@, ...)" },
{ "probefunc", DT_IDENT_SCALAR, 0, DIF_VAR_PROBEFUNC,
    DT_ATTR_STABCMN, DT_VERS_1_0, &dt_idops_type, "string" },
{ "probemod", DT_IDENT_SCALAR, 0, DIF_VAR_PROBEMOD,
    DT_ATTR_STABCMN, DT_VERS_1_0, &dt_idops_type, "string" },
{ "probename", DT_IDENT_SCALAR, 0, DIF_VAR_PROBENAME,
    DT_ATTR_STABCMN, DT_VERS_1_0, &dt_idops_type, "string" },
{ "probeprov", DT_IDENT_SCALAR, 0, DIF_VAR_PROBEPROV,
    DT_ATTR_STABCMN, DT_VERS_1_0, &dt_idops_type, "string" },
{ "progenyof", DT_IDENT_FUNC, 0, DIF_SUBR_PROGENYOF,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "int(pid_t)" },
{ "quantize", DT_IDENT_AGGFUNC, 0, DTRACEAGG_QUANTIZE,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(@, ...)" },
{ "raise", DT_IDENT_ACTFUNC, 0, DT_ACT_RAISE, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(int)" },
{ "rand", DT_IDENT_FUNC, 0, DIF_SUBR_RAND, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "int()" },
{ "rindex", DT_IDENT_FUNC, 0, DIF_SUBR_RINDEX, DT_ATTR_STABCMN, DT_VERS_1_1,
    &dt_idops_func, "int(const char *, const char *, [int])" },
{ "rw_iswriter", DT_IDENT_FUNC, 0, DIF_SUBR_RW_ISWRITER,
    DT_ATTR_EVOLCMN, DT_VERS_1_0,
    &dt_idops_func, "int(genunix`krwlock_t *)" },
{ "rw_read_held", DT_IDENT_FUNC, 0, DIF_SUBR_RW_READ_HELD,
    DT_ATTR_EVOLCMN, DT_VERS_1_0,
    &dt_idops_func, "int(genunix`krwlock_t *)" },
{ "rw_write_held", DT_IDENT_FUNC, 0, DIF_SUBR_RW_WRITE_HELD,
    DT_ATTR_EVOLCMN, DT_VERS_1_0,
    &dt_idops_func, "int(genunix`krwlock_t *)" },
{ "self", DT_IDENT_PTR, 0, 0, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "void" },
{ "setopt", DT_IDENT_ACTFUNC, 0, DT_ACT_SETOPT, DT_ATTR_STABCMN,
    DT_VERS_1_2, &dt_idops_func, "void(const char *, [const char *])" },
{ "speculate", DT_IDENT_ACTFUNC, 0, DT_ACT_SPECULATE,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(int)" },
{ "speculation", DT_IDENT_FUNC, 0, DIF_SUBR_SPECULATION,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "int()" },
{ "stack", DT_IDENT_ACTFUNC, 0, DT_ACT_STACK, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "stack(...)" },
{ "stackdepth", DT_IDENT_SCALAR, 0, DIF_VAR_STACKDEPTH,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "uint32_t" },
{ "stop", DT_IDENT_ACTFUNC, 0, DT_ACT_STOP, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void()" },
{ "strchr", DT_IDENT_FUNC, 0, DIF_SUBR_STRCHR, DT_ATTR_STABCMN, DT_VERS_1_1,
    &dt_idops_func, "string(const char *, char)" },
{ "strlen", DT_IDENT_FUNC, 0, DIF_SUBR_STRLEN, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "size_t(const char *)" },
{ "strjoin", DT_IDENT_FUNC, 0, DIF_SUBR_STRJOIN, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "string(const char *, const char *)" },
{ "strrchr", DT_IDENT_FUNC, 0, DIF_SUBR_STRRCHR, DT_ATTR_STABCMN, DT_VERS_1_1,
    &dt_idops_func, "string(const char *, char)" },
{ "strstr", DT_IDENT_FUNC, 0, DIF_SUBR_STRSTR, DT_ATTR_STABCMN, DT_VERS_1_1,
    &dt_idops_func, "string(const char *, const char *)" },
{ "strtok", DT_IDENT_FUNC, 0, DIF_SUBR_STRTOK, DT_ATTR_STABCMN, DT_VERS_1_1,
    &dt_idops_func, "string(const char *, const char *)" },
{ "substr", DT_IDENT_FUNC, 0, DIF_SUBR_SUBSTR, DT_ATTR_STABCMN, DT_VERS_1_1,
    &dt_idops_func, "string(const char *, int, [int])" },
{ "sum", DT_IDENT_AGGFUNC, 0, DTRACEAGG_SUM, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(@)" },
{ "sym", DT_IDENT_ACTFUNC, 0, DT_ACT_SYM, DT_ATTR_STABCMN,
    DT_VERS_1_2, &dt_idops_func, "_symaddr(uintptr_t)" },
{ "system", DT_IDENT_ACTFUNC, 0, DT_ACT_SYSTEM, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(@, ...)" },
{ "this", DT_IDENT_PTR, 0, 0, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "void" },
{ "tid", DT_IDENT_SCALAR, 0, DIF_VAR_TID, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "id_t" },
{ "timestamp", DT_IDENT_SCALAR, 0, DIF_VAR_TIMESTAMP,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "uint64_t" },
{ "trace", DT_IDENT_ACTFUNC, 0, DT_ACT_TRACE, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(@)" },
{ "tracemem", DT_IDENT_ACTFUNC, 0, DT_ACT_TRACEMEM,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "void(@, size_t)" },
{ "trunc", DT_IDENT_ACTFUNC, 0, DT_ACT_TRUNC, DT_ATTR_STABCMN,
    DT_VERS_1_0, &dt_idops_func, "void(...)" },
{ "uaddr", DT_IDENT_ACTFUNC, 0, DT_ACT_UADDR, DT_ATTR_STABCMN,
    DT_VERS_1_2, &dt_idops_func, "_usymaddr(uintptr_t)" },
{ "ucaller", DT_IDENT_SCALAR, 0, DIF_VAR_UCALLER, DT_ATTR_STABCMN,
    DT_VERS_1_2, &dt_idops_type, "uint64_t" },
{ "ufunc", DT_IDENT_ACTFUNC, 0, DT_ACT_USYM, DT_ATTR_STABCMN,
    DT_VERS_1_2, &dt_idops_func, "_usymaddr(uintptr_t)" },
{ "uid", DT_IDENT_SCALAR, 0, DIF_VAR_UID, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "uid_t" },
{ "umod", DT_IDENT_ACTFUNC, 0, DT_ACT_UMOD, DT_ATTR_STABCMN,
    DT_VERS_1_2, &dt_idops_func, "_usymaddr(uintptr_t)" },
{ "uregs", DT_IDENT_ARRAY, 0, DIF_VAR_UREGS, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_regs, NULL },
{ "ustack", DT_IDENT_ACTFUNC, 0, DT_ACT_USTACK, DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_func, "stack(...)" },
{ "ustackdepth", DT_IDENT_SCALAR, 0, DIF_VAR_USTACKDEPTH,
    DT_ATTR_STABCMN, DT_VERS_1_2,
    &dt_idops_type, "uint32_t" },
{ "usym", DT_IDENT_ACTFUNC, 0, DT_ACT_USYM, DT_ATTR_STABCMN,
    DT_VERS_1_2, &dt_idops_func, "_usymaddr(uintptr_t)" },
{ "vtimestamp", DT_IDENT_SCALAR, 0, DIF_VAR_VTIMESTAMP,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "uint64_t" },
{ "walltimestamp", DT_IDENT_SCALAR, 0, DIF_VAR_WALLTIMESTAMP,
    DT_ATTR_STABCMN, DT_VERS_1_0,
    &dt_idops_type, "int64_t" },
{ "zonename", DT_IDENT_SCALAR, 0, DIF_VAR_ZONENAME,
    DT_ATTR_STABCMN, DT_VERS_1_0, &dt_idops_type, "string" },
{ NULL, 0, 0, 0, { 0, 0, 0 }, 0, NULL, NULL }
};

/*
 * Tables of ILP32 intrinsic integer and floating-point type templates to use
 * to populate the dynamic "C" CTF type container.
 */
static const dt_intrinsic_t _dtrace_intrinsics_32[] = {
{ "void", { CTF_INT_SIGNED, 0, 0 }, CTF_K_INTEGER },
{ "signed", { CTF_INT_SIGNED, 0, 32 }, CTF_K_INTEGER },
{ "unsigned", { 0, 0, 32 }, CTF_K_INTEGER },
{ "char", { CTF_INT_SIGNED | CTF_INT_CHAR, 0, 8 }, CTF_K_INTEGER },
{ "short", { CTF_INT_SIGNED, 0, 16 }, CTF_K_INTEGER },
{ "int", { CTF_INT_SIGNED, 0, 32 }, CTF_K_INTEGER },
{ "long", { CTF_INT_SIGNED, 0, 32 }, CTF_K_INTEGER },
{ "long long", { CTF_INT_SIGNED, 0, 64 }, CTF_K_INTEGER },
{ "signed char", { CTF_INT_SIGNED | CTF_INT_CHAR, 0, 8 }, CTF_K_INTEGER },
{ "signed short", { CTF_INT_SIGNED, 0, 16 }, CTF_K_INTEGER },
{ "signed int", { CTF_INT_SIGNED, 0, 32 }, CTF_K_INTEGER },
{ "signed long", { CTF_INT_SIGNED, 0, 32 }, CTF_K_INTEGER },
{ "signed long long", { CTF_INT_SIGNED, 0, 64 }, CTF_K_INTEGER },
{ "unsigned char", { CTF_INT_CHAR, 0, 8 }, CTF_K_INTEGER },
{ "unsigned short", { 0, 0, 16 }, CTF_K_INTEGER },
{ "unsigned int", { 0, 0, 32 }, CTF_K_INTEGER },
{ "unsigned long", { 0, 0, 32 }, CTF_K_INTEGER },
{ "unsigned long long", { 0, 0, 64 }, CTF_K_INTEGER },
{ "_Bool", { CTF_INT_BOOL, 0, 8 }, CTF_K_INTEGER },
{ "float", { CTF_FP_SINGLE, 0, 32 }, CTF_K_FLOAT },
{ "double", { CTF_FP_DOUBLE, 0, 64 }, CTF_K_FLOAT },
{ "long double", { CTF_FP_LDOUBLE, 0, 128 }, CTF_K_FLOAT },
{ "float imaginary", { CTF_FP_IMAGRY, 0, 32 }, CTF_K_FLOAT },
{ "double imaginary", { CTF_FP_DIMAGRY, 0, 64 }, CTF_K_FLOAT },
{ "long double imaginary", { CTF_FP_LDIMAGRY, 0, 128 }, CTF_K_FLOAT },
{ "float complex", { CTF_FP_CPLX, 0, 64 }, CTF_K_FLOAT },
{ "double complex", { CTF_FP_DCPLX, 0, 128 }, CTF_K_FLOAT },
{ "long double complex", { CTF_FP_LDCPLX, 0, 256 }, CTF_K_FLOAT },
{ NULL, { 0, 0, 0 }, 0 }
};

/*
 * Tables of LP64 intrinsic integer and floating-point type templates to use
 * to populate the dynamic "C" CTF type container.
 */
static const dt_intrinsic_t _dtrace_intrinsics_64[] = {
{ "void", { CTF_INT_SIGNED, 0, 0 }, CTF_K_INTEGER },
{ "signed", { CTF_INT_SIGNED, 0, 32 }, CTF_K_INTEGER },
{ "unsigned", { 0, 0, 32 }, CTF_K_INTEGER },
{ "char", { CTF_INT_SIGNED | CTF_INT_CHAR, 0, 8 }, CTF_K_INTEGER },
{ "short", { CTF_INT_SIGNED, 0, 16 }, CTF_K_INTEGER },
{ "int", { CTF_INT_SIGNED, 0, 32 }, CTF_K_INTEGER },
{ "long", { CTF_INT_SIGNED, 0, 64 }, CTF_K_INTEGER },
{ "long long", { CTF_INT_SIGNED, 0, 64 }, CTF_K_INTEGER },
{ "signed char", { CTF_INT_SIGNED | CTF_INT_CHAR, 0, 8 }, CTF_K_INTEGER },
{ "signed short", { CTF_INT_SIGNED, 0, 16 }, CTF_K_INTEGER },
{ "signed int", { CTF_INT_SIGNED, 0, 32 }, CTF_K_INTEGER },
{ "signed long", { CTF_INT_SIGNED, 0, 64 }, CTF_K_INTEGER },
{ "signed long long", { CTF_INT_SIGNED, 0, 64 }, CTF_K_INTEGER },
{ "unsigned char", { CTF_INT_CHAR, 0, 8 }, CTF_K_INTEGER },
{ "unsigned short", { 0, 0, 16 }, CTF_K_INTEGER },
{ "unsigned int", { 0, 0, 32 }, CTF_K_INTEGER },
{ "unsigned long", { 0, 0, 64 }, CTF_K_INTEGER },
{ "unsigned long long", { 0, 0, 64 }, CTF_K_INTEGER },
{ "_Bool", { CTF_INT_BOOL, 0, 8 }, CTF_K_INTEGER },
{ "float", { CTF_FP_SINGLE, 0, 32 }, CTF_K_FLOAT },
{ "double", { CTF_FP_DOUBLE, 0, 64 }, CTF_K_FLOAT },
{ "long double", { CTF_FP_LDOUBLE, 0, 128 }, CTF_K_FLOAT },
{ "float imaginary", { CTF_FP_IMAGRY, 0, 32 }, CTF_K_FLOAT },
{ "double imaginary", { CTF_FP_DIMAGRY, 0, 64 }, CTF_K_FLOAT },
{ "long double imaginary", { CTF_FP_LDIMAGRY, 0, 128 }, CTF_K_FLOAT },
{ "float complex", { CTF_FP_CPLX, 0, 64 }, CTF_K_FLOAT },
{ "double complex", { CTF_FP_DCPLX, 0, 128 }, CTF_K_FLOAT },
{ "long double complex", { CTF_FP_LDCPLX, 0, 256 }, CTF_K_FLOAT },
{ NULL, { 0, 0, 0 }, 0 }
};

/*
 * Tables of ILP32 typedefs to use to populate the dynamic "D" CTF container.
 * These aliases ensure that D definitions can use typical <sys/types.h> names.
 */
static const dt_typedef_t _dtrace_typedefs_32[] = {
{ "char", "int8_t" },
{ "short", "int16_t" },
{ "int", "int32_t" },
{ "long long", "int64_t" },
{ "int", "intptr_t" },
{ "int", "ssize_t" },
{ "unsigned char", "uint8_t" },
{ "unsigned short", "uint16_t" },
{ "unsigned", "uint32_t" },
{ "unsigned long long", "uint64_t" },
{ "unsigned char", "uchar_t" },
{ "unsigned short", "ushort_t" },
{ "unsigned", "uint_t" },
{ "unsigned long", "ulong_t" },
{ "unsigned long long", "u_longlong_t" },
{ "int", "ptrdiff_t" },
{ "unsigned", "uintptr_t" },
{ "unsigned", "size_t" },
{ "long", "id_t" },
{ "long", "pid_t" },
{ NULL, NULL }
};

/*
 * Tables of LP64 typedefs to use to populate the dynamic "D" CTF container.
 * These aliases ensure that D definitions can use typical <sys/types.h> names.
 */
static const dt_typedef_t _dtrace_typedefs_64[] = {
{ "char", "int8_t" },
{ "short", "int16_t" },
{ "int", "int32_t" },
{ "long", "int64_t" },
{ "long", "intptr_t" },
{ "long", "ssize_t" },
{ "unsigned char", "uint8_t" },
{ "unsigned short", "uint16_t" },
{ "unsigned", "uint32_t" },
{ "unsigned long", "uint64_t" },
{ "unsigned char", "uchar_t" },
{ "unsigned short", "ushort_t" },
{ "unsigned", "uint_t" },
{ "unsigned long", "ulong_t" },
{ "unsigned long long", "u_longlong_t" },
{ "long", "ptrdiff_t" },
{ "unsigned long", "uintptr_t" },
{ "unsigned long", "size_t" },
{ "int", "id_t" },
{ "int", "pid_t" },
{ NULL, NULL }
};

/*
 * Tables of ILP32 integer type templates used to populate the dtp->dt_ints[]
 * cache when a new dtrace client open occurs.  Values are set by dtrace_open().
 */
static const dt_intdesc_t _dtrace_ints_32[] = {
{ "int", NULL, CTF_ERR, 0x7fffffffULL },
{ "unsigned int", NULL, CTF_ERR, 0xffffffffULL },
{ "long", NULL, CTF_ERR, 0x7fffffffULL },
{ "unsigned long", NULL, CTF_ERR, 0xffffffffULL },
{ "long long", NULL, CTF_ERR, 0x7fffffffffffffffULL },
{ "unsigned long long", NULL, CTF_ERR, 0xffffffffffffffffULL }
};

/*
 * Tables of LP64 integer type templates used to populate the dtp->dt_ints[]
 * cache when a new dtrace client open occurs.  Values are set by dtrace_open().
 */
static const dt_intdesc_t _dtrace_ints_64[] = {
{ "int", NULL, CTF_ERR, 0x7fffffffULL },
{ "unsigned int", NULL, CTF_ERR, 0xffffffffULL },
{ "long", NULL, CTF_ERR, 0x7fffffffffffffffULL },
{ "unsigned long", NULL, CTF_ERR, 0xffffffffffffffffULL },
{ "long long", NULL, CTF_ERR, 0x7fffffffffffffffULL },
{ "unsigned long long", NULL, CTF_ERR, 0xffffffffffffffffULL }
};

/*
 * Table of macro variable templates used to populate the macro identifier hash
 * when a new dtrace client open occurs.  Values are set by dtrace_update().
 */
static const dt_ident_t _dtrace_macros[] = {
{ "egid", DT_IDENT_SCALAR, 0, 0, DT_ATTR_STABCMN, DT_VERS_1_0 },
{ "euid", DT_IDENT_SCALAR, 0, 0, DT_ATTR_STABCMN, DT_VERS_1_0 },
{ "gid", DT_IDENT_SCALAR, 0, 0, DT_ATTR_STABCMN, DT_VERS_1_0 },
{ "pid", DT_IDENT_SCALAR, 0, 0, DT_ATTR_STABCMN, DT_VERS_1_0 },
{ "pgid", DT_IDENT_SCALAR, 0, 0, DT_ATTR_STABCMN, DT_VERS_1_0 },
{ "ppid", DT_IDENT_SCALAR, 0, 0, DT_ATTR_STABCMN, DT_VERS_1_0 },
{ "projid", DT_IDENT_SCALAR, 0, 0, DT_ATTR_STABCMN, DT_VERS_1_0 },
{ "sid", DT_IDENT_SCALAR, 0, 0, DT_ATTR_STABCMN, DT_VERS_1_0 },
{ "taskid", DT_IDENT_SCALAR, 0, 0, DT_ATTR_STABCMN, DT_VERS_1_0 },
{ "target", DT_IDENT_SCALAR, 0, 0, DT_ATTR_STABCMN, DT_VERS_1_0 },
{ "uid", DT_IDENT_SCALAR, 0, 0, DT_ATTR_STABCMN, DT_VERS_1_0 },
{ NULL, 0, 0, 0, { 0, 0, 0 }, 0 }
};

/*
 * Hard-wired definition string to be compiled and cached every time a new
 * DTrace library handle is initialized.  This string should only be used to
 * contain definitions that should be present regardless of DTRACE_O_NOLIBS.
 */
static const char _dtrace_hardwire[] = "\
inline long NULL = 0; \n\
#pragma D binding \"1.0\" NULL\n\
";

/*
 * Default DTrace configuration to use when opening libdtrace DTRACE_O_NODEV.
 * If DTRACE_O_NODEV is not set, we load the configuration from the kernel.
 * The use of CTF_MODEL_NATIVE is more subtle than it might appear: we are
 * relying on the fact that when running dtrace(1M), isaexec will invoke the
 * binary with the same bitness as the kernel, which is what we want by default
 * when generating our DIF.  The user can override the choice using oflags.
 */
static const dtrace_conf_t _dtrace_conf = {
    DIF_VERSION,        /* dtc_difversion */
    DIF_DIR_NREGS,      /* dtc_difintregs */
    DIF_DTR_NREGS,      /* dtc_diftupregs */
    CTF_MODEL_NATIVE    /* dtc_ctfmodel */
};

const dtrace_attribute_t _dtrace_maxattr = {
    DTRACE_STABILITY_MAX,
    DTRACE_STABILITY_MAX,
    DTRACE_CLASS_MAX
};

const dtrace_attribute_t _dtrace_defattr = {
    DTRACE_STABILITY_STABLE,
    DTRACE_STABILITY_STABLE,
    DTRACE_CLASS_COMMON
};

const dtrace_attribute_t _dtrace_symattr = {
    DTRACE_STABILITY_PRIVATE,
    DTRACE_STABILITY_PRIVATE,
    DTRACE_CLASS_UNKNOWN
};

const dtrace_attribute_t _dtrace_typattr = {
    DTRACE_STABILITY_PRIVATE,
    DTRACE_STABILITY_PRIVATE,
    DTRACE_CLASS_UNKNOWN
};

const dtrace_attribute_t _dtrace_prvattr = {
    DTRACE_STABILITY_PRIVATE,
    DTRACE_STABILITY_PRIVATE,
    DTRACE_CLASS_UNKNOWN
};

const dtrace_pattr_t _dtrace_prvdesc = {
{ DTRACE_STABILITY_UNSTABLE, DTRACE_STABILITY_UNSTABLE, DTRACE_CLASS_COMMON },
{ DTRACE_STABILITY_UNSTABLE, DTRACE_STABILITY_UNSTABLE, DTRACE_CLASS_COMMON },
{ DTRACE_STABILITY_UNSTABLE, DTRACE_STABILITY_UNSTABLE, DTRACE_CLASS_COMMON },
{ DTRACE_STABILITY_UNSTABLE, DTRACE_STABILITY_UNSTABLE, DTRACE_CLASS_COMMON },
{ DTRACE_STABILITY_UNSTABLE, DTRACE_STABILITY_UNSTABLE, DTRACE_CLASS_COMMON },
};

const char *_dtrace_defcpp = "/usr/ccs/lib/cpp"; /* default cpp(1) to invoke */
const char *_dtrace_defld = "/usr/ccs/bin/ld";   /* default ld(1) to invoke */

const char *_dtrace_libdir = "/usr/lib/dtrace"; /* default library directory */
const char *_dtrace_provdir = "/dev/dtrace/provider"; /* provider directory */

int _dtrace_strbuckets = 211;   /* default number of hash buckets (prime) */
int _dtrace_intbuckets = 256;   /* default number of integer buckets (Pof2) */
uint_t _dtrace_strsize = 256;   /* default size of string intrinsic type */
uint_t _dtrace_stkindent = 14;  /* default whitespace indent for stack/ustack */
uint_t _dtrace_pidbuckets = 64; /* default number of pid hash buckets */
uint_t _dtrace_pidlrulim = 8;   /* default number of pid handles to cache */
size_t _dtrace_bufsize = 512;   /* default dt_buf_create() size */
int _dtrace_argmax = 32;    /* default maximum number of probe arguments */

int _dtrace_debug = 0;      /* debug messages enabled (off) */
const char *const _dtrace_version = DT_VERS_STRING; /* API version string */
int _dtrace_rdvers = RD_VERSION; /* rtld_db feature version */

typedef struct dt_fdlist {
    int *df_fds;        /* array of provider driver file descriptors */
    uint_t df_ents;     /* number of valid elements in df_fds[] */
    uint_t df_size;     /* size of df_fds[] */
} dt_fdlist_t;

#pragma init(_dtrace_init)
void
_dtrace_init(void)
{
    _dtrace_debug = getenv("DTRACE_DEBUG") != NULL;

    for (; _dtrace_rdvers > 0; _dtrace_rdvers--) {
        if (rd_init(_dtrace_rdvers) == RD_OK)
            break;
    }
}

static dtrace_hdl_t *
set_open_errno(dtrace_hdl_t *dtp, int *errp, int err)
{
    if (dtp != NULL)
        dtrace_close(dtp);
    if (errp != NULL)
        *errp = err;
    return (NULL);
}

static void
dt_provmod_open(dt_provmod_t **provmod, dt_fdlist_t *dfp)
{
    dt_provmod_t *prov;
    char path[PATH_MAX];
    struct dirent *dp, *ep;
    DIR *dirp;
    int fd;

    if ((dirp = opendir(_dtrace_provdir)) == NULL)
        return; /* failed to open directory; just skip it */

    ep = alloca(sizeof (struct dirent) + PATH_MAX + 1);
    bzero(ep, sizeof (struct dirent) + PATH_MAX + 1);

    while (readdir_r(dirp, ep, &dp) == 0 && dp != NULL) {
        if (dp->d_name[0] == '.')
            continue; /* skip "." and ".." */

        if (dfp->df_ents == dfp->df_size) {
            uint_t size = dfp->df_size ? dfp->df_size * 2 : 16;
            int *fds = realloc(dfp->df_fds, size * sizeof (int));

            if (fds == NULL)
                break; /* skip the rest of this directory */

            dfp->df_fds = fds;
            dfp->df_size = size;
        }

        (void) snprintf(path, sizeof (path), "%s/%s",
            _dtrace_provdir, dp->d_name);

        if ((fd = open(path, O_RDONLY)) == -1)
            continue; /* failed to open driver; just skip it */

        if (((prov = malloc(sizeof (dt_provmod_t))) == NULL) ||
            (prov->dp_name = malloc(strlen(dp->d_name) + 1)) == NULL) {
            free(prov);
            (void) close(fd);
            break;
        }

        (void) strcpy(prov->dp_name, dp->d_name);
        prov->dp_next = *provmod;
        *provmod = prov;

        dt_dprintf("opened provider %s\n", dp->d_name);
        dfp->df_fds[dfp->df_ents++] = fd;
    }

    (void) closedir(dirp);
}

static void
dt_provmod_destroy(dt_provmod_t **provmod)
{
    dt_provmod_t *next, *current;

    for (current = *provmod; current != NULL; current = next) {
        next = current->dp_next;
        free(current->dp_name);
        free(current);
    }

    *provmod = NULL;
}

static const char *
dt_get_sysinfo(int cmd, char *buf, size_t len)
{
    ssize_t rv = sysinfo(cmd, buf, len);
    char *p = buf;

    if (rv < 0 || rv > len)
        (void) snprintf(buf, len, "%s", "Unknown");

    while ((p = strchr(p, '.')) != NULL)
        *p++ = '_';

    return (buf);
}

static dtrace_hdl_t *
dt_vopen(int version, int flags, int *errp,
    const dtrace_vector_t *vector, void *arg)
{
    dtrace_hdl_t *dtp = NULL;
    int dtfd = -1, ftfd = -1, fterr = 0;
    dtrace_prog_t *pgp;
    dt_module_t *dmp;
    dt_provmod_t *provmod = NULL;
    int i, err;
    struct rlimit rl;

    const dt_intrinsic_t *dinp;
    const dt_typedef_t *dtyp;
    const dt_ident_t *idp;

    dtrace_typeinfo_t dtt;
    ctf_funcinfo_t ctc;
    ctf_arinfo_t ctr;

    dt_fdlist_t df = { NULL, 0, 0 };

    char isadef[32], utsdef[32];
    char s1[64], s2[64];

    if (version <= 0)
        return (set_open_errno(dtp, errp, EINVAL));

    if (version > DTRACE_VERSION)
        return (set_open_errno(dtp, errp, EDT_VERSION));

    if (version < DTRACE_VERSION) {
        /*
         * Currently, increasing the library version number is used to
         * denote a binary incompatible change.  That is, a consumer
         * of the library cannot run on a version of the library with
         * a higher DTRACE_VERSION number than the consumer compiled
         * against.  Once the library API has been committed to,
         * backwards binary compatibility will be required; at that
         * time, this check should change to return EDT_OVERSION only
         * if the specified version number is less than the version
         * number at the time of interface commitment.
         */
        return (set_open_errno(dtp, errp, EDT_OVERSION));
    }

    if (flags & ~DTRACE_O_MASK)
        return (set_open_errno(dtp, errp, EINVAL));

    if ((flags & DTRACE_O_LP64) && (flags & DTRACE_O_ILP32))
        return (set_open_errno(dtp, errp, EINVAL));

    if (vector == NULL && arg != NULL)
        return (set_open_errno(dtp, errp, EINVAL));

    if (elf_version(EV_CURRENT) == EV_NONE)
        return (set_open_errno(dtp, errp, EDT_ELFVERSION));

    if (vector != NULL || (flags & DTRACE_O_NODEV))
        goto alloc; /* do not attempt to open dtrace device */

    /*
     * Before we get going, crank our limit on file descriptors up to the
     * hard limit.  This is to allow for the fact that libproc keeps file
     * descriptors to objects open for the lifetime of the proc handle;
     * without raising our hard limit, we would have an acceptably small
     * bound on the number of processes that we could concurrently
     * instrument with the pid provider.
     */
    if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
        rl.rlim_cur = rl.rlim_max;
        (void) setrlimit(RLIMIT_NOFILE, &rl);
    }

    /*
     * Get the device path of each of the providers.  We hold them open
     * in the df.df_fds list until we open the DTrace driver itself,
     * allowing us to see all of the probes provided on this system.  Once
     * we have the DTrace driver open, we can safely close all the providers
     * now that they have registered with the framework.
     */
    dt_provmod_open(&provmod, &df);

    dtfd = open("/dev/dtrace/dtrace", O_RDWR);
    err = errno; /* save errno from opening dtfd */

    ftfd = open("/dev/dtrace/provider/fasttrap", O_RDWR);
    fterr = ftfd == -1 ? errno : 0; /* save errno from open ftfd */

    while (df.df_ents-- != 0)
        (void) close(df.df_fds[df.df_ents]);

    free(df.df_fds);

    /*
     * If we failed to open the dtrace device, fail dtrace_open().
     * We convert some kernel errnos to custom libdtrace errnos to
     * improve the resulting message from the usual strerror().
     */
    if (dtfd == -1) {
        dt_provmod_destroy(&provmod);
        switch (err) {
        case ENOENT:
            err = EDT_NOENT;
            break;
        case EBUSY:
            err = EDT_BUSY;
            break;
        case EACCES:
            err = EDT_ACCESS;
            break;
        }
        return (set_open_errno(dtp, errp, err));
    }

    (void) fcntl(dtfd, F_SETFD, FD_CLOEXEC);
    (void) fcntl(ftfd, F_SETFD, FD_CLOEXEC);

alloc:
    if ((dtp = malloc(sizeof (dtrace_hdl_t))) == NULL)
        return (set_open_errno(dtp, errp, EDT_NOMEM));

    bzero(dtp, sizeof (dtrace_hdl_t));
    dtp->dt_oflags = flags;
    dtp->dt_prcmode = DT_PROC_STOP_PREINIT;
    dtp->dt_linkmode = DT_LINK_KERNEL;
    dtp->dt_linktype = DT_LTYP_ELF;
    dtp->dt_xlatemode = DT_XL_STATIC;
    dtp->dt_stdcmode = DT_STDC_XA;
    dtp->dt_version = version;
    dtp->dt_fd = dtfd;
    dtp->dt_ftfd = ftfd;
    dtp->dt_fterr = fterr;
    dtp->dt_cdefs_fd = -1;
    dtp->dt_ddefs_fd = -1;
    dtp->dt_stdout_fd = -1;
    dtp->dt_modbuckets = _dtrace_strbuckets;
    dtp->dt_mods = calloc(dtp->dt_modbuckets, sizeof (dt_module_t *));
    dtp->dt_provbuckets = _dtrace_strbuckets;
    dtp->dt_provs = calloc(dtp->dt_provbuckets, sizeof (dt_provider_t *));
    dt_proc_hash_create(dtp);
    dtp->dt_vmax = DT_VERS_LATEST;
    dtp->dt_cpp_path = strdup(_dtrace_defcpp);
    dtp->dt_cpp_argv = malloc(sizeof (char *));
    dtp->dt_cpp_argc = 1;
    dtp->dt_cpp_args = 1;
    dtp->dt_ld_path = strdup(_dtrace_defld);
    dtp->dt_provmod = provmod;
    dtp->dt_vector = vector;
    dtp->dt_varg = arg;
    dt_dof_init(dtp);
    (void) uname(&dtp->dt_uts);

    if (dtp->dt_mods == NULL || dtp->dt_provs == NULL ||
        dtp->dt_procs == NULL || dtp->dt_ld_path == NULL ||
        dtp->dt_cpp_path == NULL || dtp->dt_cpp_argv == NULL)
        return (set_open_errno(dtp, errp, EDT_NOMEM));

    for (i = 0; i < DTRACEOPT_MAX; i++)
        dtp->dt_options[i] = DTRACEOPT_UNSET;

    dtp->dt_cpp_argv[0] = (char *)strbasename(dtp->dt_cpp_path);

    (void) snprintf(isadef, sizeof (isadef), "-D__SUNW_D_%u",
        (uint_t)(sizeof (void *) * NBBY));

    (void) snprintf(utsdef, sizeof (utsdef), "-D__%s_%s",
        dt_get_sysinfo(SI_SYSNAME, s1, sizeof (s1)),
        dt_get_sysinfo(SI_RELEASE, s2, sizeof (s2)));

    if (dt_cpp_add_arg(dtp, "-D__sun") == NULL ||
        dt_cpp_add_arg(dtp, "-D__unix") == NULL ||
        dt_cpp_add_arg(dtp, "-D__SVR4") == NULL ||
        dt_cpp_add_arg(dtp, "-D__SUNW_D=1") == NULL ||
        dt_cpp_add_arg(dtp, isadef) == NULL ||
        dt_cpp_add_arg(dtp, utsdef) == NULL)
        return (set_open_errno(dtp, errp, EDT_NOMEM));

    if (flags & DTRACE_O_NODEV)
        bcopy(&_dtrace_conf, &dtp->dt_conf, sizeof (_dtrace_conf));
    else if (dt_ioctl(dtp, DTRACEIOC_CONF, &dtp->dt_conf) != 0)
        return (set_open_errno(dtp, errp, errno));

    if (flags & DTRACE_O_LP64)
        dtp->dt_conf.dtc_ctfmodel = CTF_MODEL_LP64;
    else if (flags & DTRACE_O_ILP32)
        dtp->dt_conf.dtc_ctfmodel = CTF_MODEL_ILP32;

#ifdef __sparc
    /*
     * On SPARC systems, __sparc is always defined for <sys/isa_defs.h>
     * and __sparcv9 is defined if we are doing a 64-bit compile.
     */
    if (dt_cpp_add_arg(dtp, "-D__sparc") == NULL)
        return (set_open_errno(dtp, errp, EDT_NOMEM));

    if (dtp->dt_conf.dtc_ctfmodel == CTF_MODEL_LP64 &&
        dt_cpp_add_arg(dtp, "-D__sparcv9") == NULL)
        return (set_open_errno(dtp, errp, EDT_NOMEM));
#endif

#ifdef __x86
    /*
     * On x86 systems, __i386 is defined for <sys/isa_defs.h> for 32-bit
     * compiles and __amd64 is defined for 64-bit compiles.  Unlike SPARC,
     * they are defined exclusive of one another (see PSARC 2004/619).
     */
    if (dtp->dt_conf.dtc_ctfmodel == CTF_MODEL_LP64) {
        if (dt_cpp_add_arg(dtp, "-D__amd64") == NULL)
            return (set_open_errno(dtp, errp, EDT_NOMEM));
    } else {
        if (dt_cpp_add_arg(dtp, "-D__i386") == NULL)
            return (set_open_errno(dtp, errp, EDT_NOMEM));
    }
#endif

    if (dtp->dt_conf.dtc_difversion < DIF_VERSION)
        return (set_open_errno(dtp, errp, EDT_DIFVERS));

    if (dtp->dt_conf.dtc_ctfmodel == CTF_MODEL_ILP32)
        bcopy(_dtrace_ints_32, dtp->dt_ints, sizeof (_dtrace_ints_32));
    else
        bcopy(_dtrace_ints_64, dtp->dt_ints, sizeof (_dtrace_ints_64));

    dtp->dt_macros = dt_idhash_create("macro", NULL, 0, UINT_MAX);
    dtp->dt_aggs = dt_idhash_create("aggregation", NULL,
        DTRACE_AGGVARIDNONE + 1, UINT_MAX);

    dtp->dt_globals = dt_idhash_create("global", _dtrace_globals,
        DIF_VAR_OTHER_UBASE, DIF_VAR_OTHER_MAX);

    dtp->dt_tls = dt_idhash_create("thread local", NULL,
        DIF_VAR_OTHER_UBASE, DIF_VAR_OTHER_MAX);

    if (dtp->dt_macros == NULL || dtp->dt_aggs == NULL ||
        dtp->dt_globals == NULL || dtp->dt_tls == NULL)
        return (set_open_errno(dtp, errp, EDT_NOMEM));

    /*
     * Populate the dt_macros identifier hash table by hand: we can't use
     * the dt_idhash_populate() mechanism because we're not yet compiling
     * and dtrace_update() needs to immediately reference these idents.
     */
    for (idp = _dtrace_macros; idp->di_name != NULL; idp++) {
        if (dt_idhash_insert(dtp->dt_macros, idp->di_name,
            idp->di_kind, idp->di_flags, idp->di_id, idp->di_attr,
            idp->di_vers, idp->di_ops ? idp->di_ops : &dt_idops_thaw,
            idp->di_iarg, 0) == NULL)
            return (set_open_errno(dtp, errp, EDT_NOMEM));
    }

    /*
     * Update the module list using /system/object and load the values for
     * the macro variable definitions according to the current process.
     */
    dtrace_update(dtp);

    /*
     * Select the intrinsics and typedefs we want based on the data model.
     * The intrinsics are under "C".  The typedefs are added under "D".
     */
    if (dtp->dt_conf.dtc_ctfmodel == CTF_MODEL_ILP32) {
        dinp = _dtrace_intrinsics_32;
        dtyp = _dtrace_typedefs_32;
    } else {
        dinp = _dtrace_intrinsics_64;
        dtyp = _dtrace_typedefs_64;
    }

    /*
     * Create a dynamic CTF container under the "C" scope for intrinsic
     * types and types defined in ANSI-C header files that are included.
     */
    if ((dmp = dtp->dt_cdefs = dt_module_create(dtp, "C")) == NULL)
        return (set_open_errno(dtp, errp, EDT_NOMEM));

    if ((dmp->dm_ctfp = ctf_create(&dtp->dt_ctferr)) == NULL)
        return (set_open_errno(dtp, errp, EDT_CTF));

    dt_dprintf("created CTF container for %s (%p)\n",
        dmp->dm_name, (void *)dmp->dm_ctfp);

    (void) ctf_setmodel(dmp->dm_ctfp, dtp->dt_conf.dtc_ctfmodel);
    ctf_setspecific(dmp->dm_ctfp, dmp);

    dmp->dm_flags = DT_DM_LOADED; /* fake up loaded bit */
    dmp->dm_modid = -1; /* no module ID */

    /*
     * Fill the dynamic "C" CTF container with all of the intrinsic
     * integer and floating-point types appropriate for this data model.
     */
    for (; dinp->din_name != NULL; dinp++) {
        if (dinp->din_kind == CTF_K_INTEGER) {
            err = ctf_add_integer(dmp->dm_ctfp, CTF_ADD_ROOT,
                dinp->din_name, &dinp->din_data);
        } else {
            err = ctf_add_float(dmp->dm_ctfp, CTF_ADD_ROOT,
                dinp->din_name, &dinp->din_data);
        }

        if (err == CTF_ERR) {
            dt_dprintf("failed to add %s to C container: %s\n",
                dinp->din_name, ctf_errmsg(
                ctf_errno(dmp->dm_ctfp)));
            return (set_open_errno(dtp, errp, EDT_CTF));
        }
    }

    if (ctf_update(dmp->dm_ctfp) != 0) {
        dt_dprintf("failed to update C container: %s\n",
            ctf_errmsg(ctf_errno(dmp->dm_ctfp)));
        return (set_open_errno(dtp, errp, EDT_CTF));
    }

    /*
     * Add intrinsic pointer types that are needed to initialize printf
     * format dictionary types (see table in dt_printf.c).
     */
    (void) ctf_add_pointer(dmp->dm_ctfp, CTF_ADD_ROOT,
        ctf_lookup_by_name(dmp->dm_ctfp, "void"));

    (void) ctf_add_pointer(dmp->dm_ctfp, CTF_ADD_ROOT,
        ctf_lookup_by_name(dmp->dm_ctfp, "char"));

    (void) ctf_add_pointer(dmp->dm_ctfp, CTF_ADD_ROOT,
        ctf_lookup_by_name(dmp->dm_ctfp, "int"));

    if (ctf_update(dmp->dm_ctfp) != 0) {
        dt_dprintf("failed to update C container: %s\n",
            ctf_errmsg(ctf_errno(dmp->dm_ctfp)));
        return (set_open_errno(dtp, errp, EDT_CTF));
    }

    /*
     * Create a dynamic CTF container under the "D" scope for types that
     * are defined by the D program itself or on-the-fly by the D compiler.
     * The "D" CTF container is a child of the "C" CTF container.
     */
    if ((dmp = dtp->dt_ddefs = dt_module_create(dtp, "D")) == NULL)
        return (set_open_errno(dtp, errp, EDT_NOMEM));

    if ((dmp->dm_ctfp = ctf_create(&dtp->dt_ctferr)) == NULL)
        return (set_open_errno(dtp, errp, EDT_CTF));

    dt_dprintf("created CTF container for %s (%p)\n",
        dmp->dm_name, (void *)dmp->dm_ctfp);

    (void) ctf_setmodel(dmp->dm_ctfp, dtp->dt_conf.dtc_ctfmodel);
    ctf_setspecific(dmp->dm_ctfp, dmp);

    dmp->dm_flags = DT_DM_LOADED; /* fake up loaded bit */
    dmp->dm_modid = -1; /* no module ID */

    if (ctf_import(dmp->dm_ctfp, dtp->dt_cdefs->dm_ctfp) == CTF_ERR) {
        dt_dprintf("failed to import D parent container: %s\n",
            ctf_errmsg(ctf_errno(dmp->dm_ctfp)));
        return (set_open_errno(dtp, errp, EDT_CTF));
    }

    /*
     * Fill the dynamic "D" CTF container with all of the built-in typedefs
     * that we need to use for our D variable and function definitions.
     * This ensures that basic inttypes.h names are always available to us.
     */
    for (; dtyp->dty_src != NULL; dtyp++) {
        if (ctf_add_typedef(dmp->dm_ctfp, CTF_ADD_ROOT,
            dtyp->dty_dst, ctf_lookup_by_name(dmp->dm_ctfp,
            dtyp->dty_src)) == CTF_ERR) {
            dt_dprintf("failed to add typedef %s %s to D "
                "container: %s", dtyp->dty_src, dtyp->dty_dst,
                ctf_errmsg(ctf_errno(dmp->dm_ctfp)));
            return (set_open_errno(dtp, errp, EDT_CTF));
        }
    }

    /*
     * Insert a CTF ID corresponding to a pointer to a type of kind
     * CTF_K_FUNCTION we can use in the compiler for function pointers.
     * CTF treats all function pointers as "int (*)()" so we only need one.
     */
    ctc.ctc_return = ctf_lookup_by_name(dmp->dm_ctfp, "int");
    ctc.ctc_argc = 0;
    ctc.ctc_flags = 0;

    dtp->dt_type_func = ctf_add_function(dmp->dm_ctfp,
        CTF_ADD_ROOT, &ctc, NULL);

    dtp->dt_type_fptr = ctf_add_pointer(dmp->dm_ctfp,
        CTF_ADD_ROOT, dtp->dt_type_func);

    /*
     * We also insert CTF definitions for the special D intrinsic types
     * string and <DYN> into the D container.  The string type is added
     * as a typedef of char[n].  The <DYN> type is an alias for void.
     * We compare types to these special CTF ids throughout the compiler.
     */
    ctr.ctr_contents = ctf_lookup_by_name(dmp->dm_ctfp, "char");
    ctr.ctr_index = ctf_lookup_by_name(dmp->dm_ctfp, "long");
    ctr.ctr_nelems = _dtrace_strsize;

    dtp->dt_type_str = ctf_add_typedef(dmp->dm_ctfp, CTF_ADD_ROOT,
        "string", ctf_add_array(dmp->dm_ctfp, CTF_ADD_ROOT, &ctr));

    dtp->dt_type_dyn = ctf_add_typedef(dmp->dm_ctfp, CTF_ADD_ROOT,
        "<DYN>", ctf_lookup_by_name(dmp->dm_ctfp, "void"));

    dtp->dt_type_stack = ctf_add_typedef(dmp->dm_ctfp, CTF_ADD_ROOT,
        "stack", ctf_lookup_by_name(dmp->dm_ctfp, "void"));

    dtp->dt_type_symaddr = ctf_add_typedef(dmp->dm_ctfp, CTF_ADD_ROOT,
        "_symaddr", ctf_lookup_by_name(dmp->dm_ctfp, "void"));

    dtp->dt_type_usymaddr = ctf_add_typedef(dmp->dm_ctfp, CTF_ADD_ROOT,
        "_usymaddr", ctf_lookup_by_name(dmp->dm_ctfp, "void"));

    if (dtp->dt_type_func == CTF_ERR || dtp->dt_type_fptr == CTF_ERR ||
        dtp->dt_type_str == CTF_ERR || dtp->dt_type_dyn == CTF_ERR ||
        dtp->dt_type_stack == CTF_ERR || dtp->dt_type_symaddr == CTF_ERR ||
        dtp->dt_type_usymaddr == CTF_ERR) {
        dt_dprintf("failed to add intrinsic to D container: %s\n",
            ctf_errmsg(ctf_errno(dmp->dm_ctfp)));
        return (set_open_errno(dtp, errp, EDT_CTF));
    }

    if (ctf_update(dmp->dm_ctfp) != 0) {
        dt_dprintf("failed update D container: %s\n",
            ctf_errmsg(ctf_errno(dmp->dm_ctfp)));
        return (set_open_errno(dtp, errp, EDT_CTF));
    }

    /*
     * Initialize the integer description table used to convert integer
     * constants to the appropriate types.  Refer to the comments above
     * dt_node_int() for a complete description of how this table is used.
     */
    for (i = 0; i < sizeof (dtp->dt_ints) / sizeof (dtp->dt_ints[0]); i++) {
        if (dtrace_lookup_by_type(dtp, DTRACE_OBJ_EVERY,
            dtp->dt_ints[i].did_name, &dtt) != 0) {
            dt_dprintf("failed to lookup integer type %s: %s\n",
                dtp->dt_ints[i].did_name,
                dtrace_errmsg(dtp, dtrace_errno(dtp)));
            return (set_open_errno(dtp, errp, dtp->dt_errno));
        }
        dtp->dt_ints[i].did_ctfp = dtt.dtt_ctfp;
        dtp->dt_ints[i].did_type = dtt.dtt_type;
    }

    /*
     * Now that we've created the "C" and "D" containers, move them to the
     * start of the module list so that these types and symbols are found
     * first (for stability) when iterating through the module list.
     */
    dt_list_delete(&dtp->dt_modlist, dtp->dt_ddefs);
    dt_list_prepend(&dtp->dt_modlist, dtp->dt_ddefs);

    dt_list_delete(&dtp->dt_modlist, dtp->dt_cdefs);
    dt_list_prepend(&dtp->dt_modlist, dtp->dt_cdefs);

    if (dt_pfdict_create(dtp) == -1)
        return (set_open_errno(dtp, errp, dtp->dt_errno));

    /*
     * If we are opening libdtrace DTRACE_O_NODEV enable C_ZDEFS by default
     * because without /dev/dtrace open, we will not be able to load the
     * names and attributes of any providers or probes from the kernel.
     */
    if (flags & DTRACE_O_NODEV)
        dtp->dt_cflags |= DTRACE_C_ZDEFS;

    /*
     * Load hard-wired inlines into the definition cache by calling the
     * compiler on the raw definition string defined above.
     */
    if ((pgp = dtrace_program_strcompile(dtp, _dtrace_hardwire,
        DTRACE_PROBESPEC_NONE, DTRACE_C_EMPTY, 0, NULL)) == NULL) {
        dt_dprintf("failed to load hard-wired definitions: %s\n",
            dtrace_errmsg(dtp, dtrace_errno(dtp)));
        return (set_open_errno(dtp, errp, EDT_HARDWIRE));
    }

    dt_program_destroy(dtp, pgp);

    /*
     * Set up the default DTrace library path.  Once set, the next call to
     * dt_compile() will compile all the libraries.  We intentionally defer
     * library processing to improve overhead for clients that don't ever
     * compile, and to provide better error reporting (because the full
     * reporting of compiler errors requires dtrace_open() to succeed).
     */
    if (dtrace_setopt(dtp, "libdir", _dtrace_libdir) != 0)
        return (set_open_errno(dtp, errp, dtp->dt_errno));

    return (dtp);
}

dtrace_hdl_t *
dtrace_open(int version, int flags, int *errp)
{
    return (dt_vopen(version, flags, errp, NULL, NULL));
}

dtrace_hdl_t *
dtrace_vopen(int version, int flags, int *errp,
    const dtrace_vector_t *vector, void *arg)
{
    return (dt_vopen(version, flags, errp, vector, arg));
}

void
dtrace_close(dtrace_hdl_t *dtp)
{
    dt_ident_t *idp, *ndp;
    dt_module_t *dmp;
    dt_provider_t *pvp;
    dtrace_prog_t *pgp;
    dt_xlator_t *dxp;
    dt_dirpath_t *dirp;
    int i;

    while ((pgp = dt_list_next(&dtp->dt_programs)) != NULL)
        dt_program_destroy(dtp, pgp);

    while ((dxp = dt_list_next(&dtp->dt_xlators)) != NULL)
        dt_xlator_destroy(dtp, dxp);

    dt_free(dtp, dtp->dt_xlatormap);

    for (idp = dtp->dt_externs; idp != NULL; idp = ndp) {
        ndp = idp->di_next;
        dt_ident_destroy(idp);
    }

    if (dtp->dt_macros != NULL)
        dt_idhash_destroy(dtp->dt_macros);
    if (dtp->dt_aggs != NULL)
        dt_idhash_destroy(dtp->dt_aggs);
    if (dtp->dt_globals != NULL)
        dt_idhash_destroy(dtp->dt_globals);
    if (dtp->dt_tls != NULL)
        dt_idhash_destroy(dtp->dt_tls);

    while ((dmp = dt_list_next(&dtp->dt_modlist)) != NULL)
        dt_module_destroy(dtp, dmp);

    while ((pvp = dt_list_next(&dtp->dt_provlist)) != NULL)
        dt_provider_destroy(dtp, pvp);

    if (dtp->dt_procs != NULL)
        dt_proc_hash_destroy(dtp);

    if (dtp->dt_fd != -1)
        (void) close(dtp->dt_fd);
    if (dtp->dt_ftfd != -1)
        (void) close(dtp->dt_ftfd);
    if (dtp->dt_cdefs_fd != -1)
        (void) close(dtp->dt_cdefs_fd);
    if (dtp->dt_ddefs_fd != -1)
        (void) close(dtp->dt_ddefs_fd);
    if (dtp->dt_stdout_fd != -1)
        (void) close(dtp->dt_stdout_fd);

    dt_epid_destroy(dtp);
    dt_aggid_destroy(dtp);
    dt_format_destroy(dtp);
    dt_buffered_destroy(dtp);
    dt_aggregate_destroy(dtp);
    free(dtp->dt_buf.dtbd_data);
    dt_pfdict_destroy(dtp);
    dt_provmod_destroy(&dtp->dt_provmod);
    dt_dof_fini(dtp);

    for (i = 1; i < dtp->dt_cpp_argc; i++)
        free(dtp->dt_cpp_argv[i]);

    while ((dirp = dt_list_next(&dtp->dt_lib_path)) != NULL) {
        dt_list_delete(&dtp->dt_lib_path, dirp);
        free(dirp->dir_path);
        free(dirp);
    }

    free(dtp->dt_cpp_argv);
    free(dtp->dt_cpp_path);
    free(dtp->dt_ld_path);

    free(dtp->dt_mods);
    free(dtp->dt_provs);
    free(dtp);
}

int
dtrace_provider_modules(dtrace_hdl_t *dtp, const char **mods, int nmods)
{
    dt_provmod_t *prov;
    int i = 0;

    for (prov = dtp->dt_provmod; prov != NULL; prov = prov->dp_next, i++) {
        if (i < nmods)
            mods[i] = prov->dp_name;
    }

    return (i);
}

int
dtrace_ctlfd(dtrace_hdl_t *dtp)
{
    return (dtp->dt_fd);
}