1 files changed, 1031 insertions, 0 deletions

diff --git a/lib/libdtrace/common/dt_options.c b/lib/libdtrace/common/dt_options.c
new file mode 100644
index 000000000000..fa1407f83c12
--- /dev/null
+++ b/lib/libdtrace/common/dt_options.c
@@ -0,0 +1,1031 @@
+/*
+ * 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/resource.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+
+#include <strings.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <limits.h>
+#if defined(sun)
+#include <alloca.h>
+#endif
+#include <errno.h>
+#include <fcntl.h>
+
+#include <dt_impl.h>
+#include <dt_string.h>
+
+static int
+dt_opt_agg(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	dt_aggregate_t *agp = &dtp->dt_aggregate;
+
+	if (arg != NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	agp->dtat_flags |= option;
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_amin(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	char str[DTRACE_ATTR2STR_MAX];
+	dtrace_attribute_t attr;
+
+	if (arg == NULL || dtrace_str2attr(arg, &attr) == -1)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	dt_dprintf("set compiler attribute minimum to %s\n",
+	    dtrace_attr2str(attr, str, sizeof (str)));
+
+	if (dtp->dt_pcb != NULL) {
+		dtp->dt_pcb->pcb_cflags |= DTRACE_C_EATTR;
+		dtp->dt_pcb->pcb_amin = attr;
+	} else {
+		dtp->dt_cflags |= DTRACE_C_EATTR;
+		dtp->dt_amin = attr;
+	}
+
+	return (0);
+}
+
+static void
+dt_coredump(void)
+{
+	const char msg[] = "libdtrace DEBUG: [ forcing coredump ]\n";
+
+	struct sigaction act;
+	struct rlimit lim;
+
+	(void) write(STDERR_FILENO, msg, sizeof (msg) - 1);
+
+	act.sa_handler = SIG_DFL;
+	act.sa_flags = 0;
+
+	(void) sigemptyset(&act.sa_mask);
+	(void) sigaction(SIGABRT, &act, NULL);
+
+	lim.rlim_cur = RLIM_INFINITY;
+	lim.rlim_max = RLIM_INFINITY;
+
+	(void) setrlimit(RLIMIT_CORE, &lim);
+	abort();
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_core(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	static int enabled = 0;
+
+	if (arg != NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (enabled++ || atexit(dt_coredump) == 0)
+		return (0);
+
+	return (dt_set_errno(dtp, errno));
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_cpp_hdrs(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	if (arg != NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (dtp->dt_pcb != NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTCTX));
+
+	if (dt_cpp_add_arg(dtp, "-H") == NULL)
+		return (dt_set_errno(dtp, EDT_NOMEM));
+
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_cpp_path(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	char *cpp;
+
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (dtp->dt_pcb != NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTCTX));
+
+	if ((cpp = strdup(arg)) == NULL)
+		return (dt_set_errno(dtp, EDT_NOMEM));
+
+	dtp->dt_cpp_argv[0] = (char *)strbasename(cpp);
+	free(dtp->dt_cpp_path);
+	dtp->dt_cpp_path = cpp;
+
+	return (0);
+}
+
+static int
+dt_opt_cpp_opts(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	char *buf;
+	size_t len;
+	const char *opt = (const char *)option;
+
+	if (opt == NULL || arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (dtp->dt_pcb != NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTCTX));
+
+	len = strlen(opt) + strlen(arg) + 1;
+	buf = alloca(len);
+
+	(void) strcpy(buf, opt);
+	(void) strcat(buf, arg);
+
+	if (dt_cpp_add_arg(dtp, buf) == NULL)
+		return (dt_set_errno(dtp, EDT_NOMEM));
+
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_ctypes(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	int fd;
+
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if ((fd = open64(arg, O_CREAT | O_WRONLY, 0666)) == -1)
+		return (dt_set_errno(dtp, errno));
+
+	(void) close(dtp->dt_cdefs_fd);
+	dtp->dt_cdefs_fd = fd;
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_droptags(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	dtp->dt_droptags = 1;
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_dtypes(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	int fd;
+
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if ((fd = open64(arg, O_CREAT | O_WRONLY, 0666)) == -1)
+		return (dt_set_errno(dtp, errno));
+
+	(void) close(dtp->dt_ddefs_fd);
+	dtp->dt_ddefs_fd = fd;
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_debug(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	if (arg != NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	_dtrace_debug = 1;
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_iregs(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	int n;
+
+	if (arg == NULL || (n = atoi(arg)) <= 0)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	dtp->dt_conf.dtc_difintregs = n;
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_lazyload(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	dtp->dt_lazyload = 1;
+
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_ld_path(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	char *ld;
+
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (dtp->dt_pcb != NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTCTX));
+
+	if ((ld = strdup(arg)) == NULL)
+		return (dt_set_errno(dtp, EDT_NOMEM));
+
+	free(dtp->dt_ld_path);
+	dtp->dt_ld_path = ld;
+
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_libdir(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	dt_dirpath_t *dp;
+
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if ((dp = malloc(sizeof (dt_dirpath_t))) == NULL ||
+	    (dp->dir_path = strdup(arg)) == NULL) {
+		free(dp);
+		return (dt_set_errno(dtp, EDT_NOMEM));
+	}
+
+	dt_list_append(&dtp->dt_lib_path, dp);
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_linkmode(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (strcmp(arg, "kernel") == 0)
+		dtp->dt_linkmode = DT_LINK_KERNEL;
+	else if (strcmp(arg, "primary") == 0)
+		dtp->dt_linkmode = DT_LINK_PRIMARY;
+	else if (strcmp(arg, "dynamic") == 0)
+		dtp->dt_linkmode = DT_LINK_DYNAMIC;
+	else if (strcmp(arg, "static") == 0)
+		dtp->dt_linkmode = DT_LINK_STATIC;
+	else
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_linktype(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (strcasecmp(arg, "elf") == 0)
+		dtp->dt_linktype = DT_LTYP_ELF;
+	else if (strcasecmp(arg, "dof") == 0)
+		dtp->dt_linktype = DT_LTYP_DOF;
+	else
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_evaltime(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (strcmp(arg, "exec") == 0)
+		dtp->dt_prcmode = DT_PROC_STOP_CREATE;
+	else if (strcmp(arg, "preinit") == 0)
+		dtp->dt_prcmode = DT_PROC_STOP_PREINIT;
+	else if (strcmp(arg, "postinit") == 0)
+		dtp->dt_prcmode = DT_PROC_STOP_POSTINIT;
+	else if (strcmp(arg, "main") == 0)
+		dtp->dt_prcmode = DT_PROC_STOP_MAIN;
+	else
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_pgmax(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	int n;
+
+	if (arg == NULL || (n = atoi(arg)) < 0)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	dtp->dt_procs->dph_lrulim = n;
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_stdc(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (dtp->dt_pcb != NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTCTX));
+
+	if (strcmp(arg, "a") == 0)
+		dtp->dt_stdcmode = DT_STDC_XA;
+	else if (strcmp(arg, "c") == 0)
+		dtp->dt_stdcmode = DT_STDC_XC;
+	else if (strcmp(arg, "s") == 0)
+		dtp->dt_stdcmode = DT_STDC_XS;
+	else if (strcmp(arg, "t") == 0)
+		dtp->dt_stdcmode = DT_STDC_XT;
+	else
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_syslibdir(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	dt_dirpath_t *dp = dt_list_next(&dtp->dt_lib_path);
+	char *path;
+
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if ((path = strdup(arg)) == NULL)
+		return (dt_set_errno(dtp, EDT_NOMEM));
+
+	free(dp->dir_path);
+	dp->dir_path = path;
+
+	return (0);
+}
+
+
+/*ARGSUSED*/
+static int
+dt_opt_tree(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	int m;
+
+	if (arg == NULL || (m = atoi(arg)) <= 0)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	dtp->dt_treedump = m;
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_tregs(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	int n;
+
+	if (arg == NULL || (n = atoi(arg)) <= 0)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	dtp->dt_conf.dtc_diftupregs = n;
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_xlate(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (strcmp(arg, "dynamic") == 0)
+		dtp->dt_xlatemode = DT_XL_DYNAMIC;
+	else if (strcmp(arg, "static") == 0)
+		dtp->dt_xlatemode = DT_XL_STATIC;
+	else
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_cflags(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	if (arg != NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (dtp->dt_pcb != NULL)
+		dtp->dt_pcb->pcb_cflags |= option;
+	else
+		dtp->dt_cflags |= option;
+
+	return (0);
+}
+
+static int
+dt_opt_dflags(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	if (arg != NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	dtp->dt_dflags |= option;
+	return (0);
+}
+
+static int
+dt_opt_invcflags(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	if (arg != NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (dtp->dt_pcb != NULL)
+		dtp->dt_pcb->pcb_cflags &= ~option;
+	else
+		dtp->dt_cflags &= ~option;
+
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_version(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	dt_version_t v;
+
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (dt_version_str2num(arg, &v) == -1)
+		return (dt_set_errno(dtp, EDT_VERSINVAL));
+
+	if (!dt_version_defined(v))
+		return (dt_set_errno(dtp, EDT_VERSUNDEF));
+
+	return (dt_reduce(dtp, v));
+}
+
+static int
+dt_opt_runtime(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	char *end;
+	dtrace_optval_t val = 0;
+	int i;
+
+	const struct {
+		char *positive;
+		char *negative;
+	} couples[] = {
+		{ "yes",	"no" },
+		{ "enable",	"disable" },
+		{ "enabled",	"disabled" },
+		{ "true",	"false" },
+		{ "on",		"off" },
+		{ "set",	"unset" },
+		{ NULL }
+	};
+
+	if (arg != NULL) {
+		if (arg[0] == '\0') {
+			val = DTRACEOPT_UNSET;
+			goto out;
+		}
+
+		for (i = 0; couples[i].positive != NULL; i++) {
+			if (strcasecmp(couples[i].positive, arg) == 0) {
+				val = 1;
+				goto out;
+			}
+
+			if (strcasecmp(couples[i].negative, arg) == 0) {
+				val = DTRACEOPT_UNSET;
+				goto out;
+			}
+		}
+
+		errno = 0;
+		val = strtoull(arg, &end, 0);
+
+		if (*end != '\0' || errno != 0 || val < 0)
+			return (dt_set_errno(dtp, EDT_BADOPTVAL));
+	}
+
+out:
+	dtp->dt_options[option] = val;
+	return (0);
+}
+
+static int
+dt_optval_parse(const char *arg, dtrace_optval_t *rval)
+{
+	dtrace_optval_t mul = 1;
+	size_t len;
+	char *end;
+
+	len = strlen(arg);
+	errno = 0;
+
+	switch (arg[len - 1]) {
+	case 't':
+	case 'T':
+		mul *= 1024;
+		/*FALLTHRU*/
+	case 'g':
+	case 'G':
+		mul *= 1024;
+		/*FALLTHRU*/
+	case 'm':
+	case 'M':
+		mul *= 1024;
+		/*FALLTHRU*/
+	case 'k':
+	case 'K':
+		mul *= 1024;
+		/*FALLTHRU*/
+	default:
+		break;
+	}
+
+	errno = 0;
+	*rval = strtoull(arg, &end, 0) * mul;
+
+	if ((mul > 1 && end != &arg[len - 1]) || (mul == 1 && *end != '\0') ||
+	    *rval < 0 || errno != 0)
+		return (-1);
+
+	return (0);
+}
+
+static int
+dt_opt_size(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	dtrace_optval_t val = 0;
+
+	if (arg != NULL && dt_optval_parse(arg, &val) != 0)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	dtp->dt_options[option] = val;
+	return (0);
+}
+
+static int
+dt_opt_rate(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	char *end;
+	int i;
+	dtrace_optval_t mul = 1, val = 0;
+
+	const struct {
+		char *name;
+		hrtime_t mul;
+	} suffix[] = {
+		{ "ns", 	NANOSEC / NANOSEC },
+		{ "nsec",	NANOSEC / NANOSEC },
+		{ "us",		NANOSEC / MICROSEC },
+		{ "usec",	NANOSEC / MICROSEC },
+		{ "ms",		NANOSEC / MILLISEC },
+		{ "msec",	NANOSEC / MILLISEC },
+		{ "s",		NANOSEC / SEC },
+		{ "sec",	NANOSEC / SEC },
+		{ "m",		NANOSEC * (hrtime_t)60 },
+		{ "min",	NANOSEC * (hrtime_t)60 },
+		{ "h",		NANOSEC * (hrtime_t)60 * (hrtime_t)60 },
+		{ "hour",	NANOSEC * (hrtime_t)60 * (hrtime_t)60 },
+		{ "d",		NANOSEC * (hrtime_t)(24 * 60 * 60) },
+		{ "day",	NANOSEC * (hrtime_t)(24 * 60 * 60) },
+		{ "hz",		0 },
+		{ NULL }
+	};
+
+	if (arg != NULL) {
+		errno = 0;
+		val = strtoull(arg, &end, 0);
+
+		for (i = 0; suffix[i].name != NULL; i++) {
+			if (strcasecmp(suffix[i].name, end) == 0) {
+				mul = suffix[i].mul;
+				break;
+			}
+		}
+
+		if (suffix[i].name == NULL && *end != '\0' || val < 0)
+			return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+		if (mul == 0) {
+			/*
+			 * The rate has been specified in frequency-per-second.
+			 */
+			if (val != 0)
+				val = NANOSEC / val;
+		} else {
+			val *= mul;
+		}
+	}
+
+	dtp->dt_options[option] = val;
+	return (0);
+}
+
+/*
+ * When setting the strsize option, set the option in the dt_options array
+ * using dt_opt_size() as usual, and then update the definition of the CTF
+ * type for the D intrinsic "string" to be an array of the corresponding size.
+ * If any errors occur, reset dt_options[option] to its previous value.
+ */
+static int
+dt_opt_strsize(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	dtrace_optval_t val = dtp->dt_options[option];
+	ctf_file_t *fp = DT_STR_CTFP(dtp);
+	ctf_id_t type = ctf_type_resolve(fp, DT_STR_TYPE(dtp));
+	ctf_arinfo_t r;
+
+	if (dt_opt_size(dtp, arg, option) != 0)
+		return (-1); /* dt_errno is set for us */
+
+	if (dtp->dt_options[option] > UINT_MAX) {
+		dtp->dt_options[option] = val;
+		return (dt_set_errno(dtp, EOVERFLOW));
+	}
+
+	if (ctf_array_info(fp, type, &r) == CTF_ERR) {
+		dtp->dt_options[option] = val;
+		dtp->dt_ctferr = ctf_errno(fp);
+		return (dt_set_errno(dtp, EDT_CTF));
+	}
+
+	r.ctr_nelems = (uint_t)dtp->dt_options[option];
+
+	if (ctf_set_array(fp, type, &r) == CTF_ERR ||
+	    ctf_update(fp) == CTF_ERR) {
+		dtp->dt_options[option] = val;
+		dtp->dt_ctferr = ctf_errno(fp);
+		return (dt_set_errno(dtp, EDT_CTF));
+	}
+
+	return (0);
+}
+
+static const struct {
+	const char *dtbp_name;
+	int dtbp_policy;
+} _dtrace_bufpolicies[] = {
+	{ "ring", DTRACEOPT_BUFPOLICY_RING },
+	{ "fill", DTRACEOPT_BUFPOLICY_FILL },
+	{ "switch", DTRACEOPT_BUFPOLICY_SWITCH },
+	{ NULL, 0 }
+};
+
+/*ARGSUSED*/
+static int
+dt_opt_bufpolicy(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	dtrace_optval_t policy = DTRACEOPT_UNSET;
+	int i;
+
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	for (i = 0; _dtrace_bufpolicies[i].dtbp_name != NULL; i++) {
+		if (strcmp(_dtrace_bufpolicies[i].dtbp_name, arg) == 0) {
+			policy = _dtrace_bufpolicies[i].dtbp_policy;
+			break;
+		}
+	}
+
+	if (policy == DTRACEOPT_UNSET)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	dtp->dt_options[DTRACEOPT_BUFPOLICY] = policy;
+
+	return (0);
+}
+
+static const struct {
+	const char *dtbr_name;
+	int dtbr_policy;
+} _dtrace_bufresize[] = {
+	{ "auto", DTRACEOPT_BUFRESIZE_AUTO },
+	{ "manual", DTRACEOPT_BUFRESIZE_MANUAL },
+	{ NULL, 0 }
+};
+
+/*ARGSUSED*/
+static int
+dt_opt_bufresize(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	dtrace_optval_t policy = DTRACEOPT_UNSET;
+	int i;
+
+	if (arg == NULL)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	for (i = 0; _dtrace_bufresize[i].dtbr_name != NULL; i++) {
+		if (strcmp(_dtrace_bufresize[i].dtbr_name, arg) == 0) {
+			policy = _dtrace_bufresize[i].dtbr_policy;
+			break;
+		}
+	}
+
+	if (policy == DTRACEOPT_UNSET)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	dtp->dt_options[DTRACEOPT_BUFRESIZE] = policy;
+
+	return (0);
+}
+
+int
+dt_options_load(dtrace_hdl_t *dtp)
+{
+	dof_hdr_t hdr, *dof;
+	dof_sec_t *sec;
+	size_t offs;
+	int i;
+
+	/*
+	 * To load the option values, we need to ask the kernel to provide its
+	 * DOF, which we'll sift through to look for OPTDESC sections.
+	 */
+	bzero(&hdr, sizeof (dof_hdr_t));
+	hdr.dofh_loadsz = sizeof (dof_hdr_t);
+
+#if defined(sun)
+	if (dt_ioctl(dtp, DTRACEIOC_DOFGET, &hdr) == -1)
+#else
+	dof = &hdr;
+	if (dt_ioctl(dtp, DTRACEIOC_DOFGET, &dof) == -1)
+#endif
+		return (dt_set_errno(dtp, errno));
+
+	if (hdr.dofh_loadsz < sizeof (dof_hdr_t))
+		return (dt_set_errno(dtp, EINVAL));
+
+	dof = alloca(hdr.dofh_loadsz);
+	bzero(dof, sizeof (dof_hdr_t));
+	dof->dofh_loadsz = hdr.dofh_loadsz;
+
+	for (i = 0; i < DTRACEOPT_MAX; i++)
+		dtp->dt_options[i] = DTRACEOPT_UNSET;
+
+#if defined(sun)
+	if (dt_ioctl(dtp, DTRACEIOC_DOFGET, dof) == -1)
+#else
+	if (dt_ioctl(dtp, DTRACEIOC_DOFGET, &dof) == -1)
+#endif
+		return (dt_set_errno(dtp, errno));
+
+	for (i = 0; i < dof->dofh_secnum; i++) {
+		sec = (dof_sec_t *)(uintptr_t)((uintptr_t)dof +
+		    dof->dofh_secoff + i * dof->dofh_secsize);
+
+		if (sec->dofs_type != DOF_SECT_OPTDESC)
+			continue;
+
+		break;
+	}
+
+	for (offs = 0; offs < sec->dofs_size; offs += sec->dofs_entsize) {
+		dof_optdesc_t *opt = (dof_optdesc_t *)(uintptr_t)
+		    ((uintptr_t)dof + sec->dofs_offset + offs);
+
+		if (opt->dofo_strtab != DOF_SECIDX_NONE)
+			continue;
+
+		if (opt->dofo_option >= DTRACEOPT_MAX)
+			continue;
+
+		dtp->dt_options[opt->dofo_option] = opt->dofo_value;
+	}
+
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+dt_opt_preallocate(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
+{
+	dtrace_optval_t size;
+	void *p;
+
+	if (arg == NULL || dt_optval_parse(arg, &size) != 0)
+		return (dt_set_errno(dtp, EDT_BADOPTVAL));
+
+	if (size > SIZE_MAX)
+		size = SIZE_MAX;
+
+	if ((p = dt_zalloc(dtp, size)) == NULL) {
+		do {
+			size /= 2;
+		} while ((p = dt_zalloc(dtp, size)) == NULL);
+	}
+
+	dt_free(dtp, p);
+
+	return (0);
+}
+
+typedef struct dt_option {
+	const char *o_name;
+	int (*o_func)(dtrace_hdl_t *, const char *, uintptr_t);
+	uintptr_t o_option;
+} dt_option_t;
+
+/*
+ * Compile-time options.
+ */
+static const dt_option_t _dtrace_ctoptions[] = {
+	{ "aggpercpu", dt_opt_agg, DTRACE_A_PERCPU },
+	{ "amin", dt_opt_amin },
+	{ "argref", dt_opt_cflags, DTRACE_C_ARGREF },
+	{ "core", dt_opt_core },
+	{ "cpp", dt_opt_cflags, DTRACE_C_CPP },
+	{ "cpphdrs", dt_opt_cpp_hdrs },
+	{ "cpppath", dt_opt_cpp_path },
+	{ "ctypes", dt_opt_ctypes },
+	{ "defaultargs", dt_opt_cflags, DTRACE_C_DEFARG },
+	{ "dtypes", dt_opt_dtypes },
+	{ "debug", dt_opt_debug },
+	{ "define", dt_opt_cpp_opts, (uintptr_t)"-D" },
+	{ "droptags", dt_opt_droptags },
+	{ "empty", dt_opt_cflags, DTRACE_C_EMPTY },
+	{ "errtags", dt_opt_cflags, DTRACE_C_ETAGS },
+	{ "evaltime", dt_opt_evaltime },
+	{ "incdir", dt_opt_cpp_opts, (uintptr_t)"-I" },
+	{ "iregs", dt_opt_iregs },
+	{ "kdefs", dt_opt_invcflags, DTRACE_C_KNODEF },
+	{ "knodefs", dt_opt_cflags, DTRACE_C_KNODEF },
+	{ "late", dt_opt_xlate },
+	{ "lazyload", dt_opt_lazyload },
+	{ "ldpath", dt_opt_ld_path },
+	{ "libdir", dt_opt_libdir },
+	{ "linkmode", dt_opt_linkmode },
+	{ "linktype", dt_opt_linktype },
+	{ "nolibs", dt_opt_cflags, DTRACE_C_NOLIBS },
+	{ "pgmax", dt_opt_pgmax },
+	{ "preallocate", dt_opt_preallocate },
+	{ "pspec", dt_opt_cflags, DTRACE_C_PSPEC },
+	{ "stdc", dt_opt_stdc },
+	{ "strip", dt_opt_dflags, DTRACE_D_STRIP },
+	{ "syslibdir", dt_opt_syslibdir },
+	{ "tree", dt_opt_tree },
+	{ "tregs", dt_opt_tregs },
+	{ "udefs", dt_opt_invcflags, DTRACE_C_UNODEF },
+	{ "undef", dt_opt_cpp_opts, (uintptr_t)"-U" },
+	{ "unodefs", dt_opt_cflags, DTRACE_C_UNODEF },
+	{ "verbose", dt_opt_cflags, DTRACE_C_DIFV },
+	{ "version", dt_opt_version },
+	{ "zdefs", dt_opt_cflags, DTRACE_C_ZDEFS },
+	{ NULL, NULL, 0 }
+};
+
+/*
+ * Run-time options.
+ */
+static const dt_option_t _dtrace_rtoptions[] = {
+	{ "aggsize", dt_opt_size, DTRACEOPT_AGGSIZE },
+	{ "bufsize", dt_opt_size, DTRACEOPT_BUFSIZE },
+	{ "bufpolicy", dt_opt_bufpolicy, DTRACEOPT_BUFPOLICY },
+	{ "bufresize", dt_opt_bufresize, DTRACEOPT_BUFRESIZE },
+	{ "cleanrate", dt_opt_rate, DTRACEOPT_CLEANRATE },
+	{ "cpu", dt_opt_runtime, DTRACEOPT_CPU },
+	{ "destructive", dt_opt_runtime, DTRACEOPT_DESTRUCTIVE },
+	{ "dynvarsize", dt_opt_size, DTRACEOPT_DYNVARSIZE },
+	{ "grabanon", dt_opt_runtime, DTRACEOPT_GRABANON },
+	{ "jstackframes", dt_opt_runtime, DTRACEOPT_JSTACKFRAMES },
+	{ "jstackstrsize", dt_opt_size, DTRACEOPT_JSTACKSTRSIZE },
+	{ "nspec", dt_opt_runtime, DTRACEOPT_NSPEC },
+	{ "specsize", dt_opt_size, DTRACEOPT_SPECSIZE },
+	{ "stackframes", dt_opt_runtime, DTRACEOPT_STACKFRAMES },
+	{ "statusrate", dt_opt_rate, DTRACEOPT_STATUSRATE },
+	{ "strsize", dt_opt_strsize, DTRACEOPT_STRSIZE },
+	{ "ustackframes", dt_opt_runtime, DTRACEOPT_USTACKFRAMES },
+	{ NULL, NULL, 0 }
+};
+
+/*
+ * Dynamic run-time options.
+ */
+static const dt_option_t _dtrace_drtoptions[] = {
+	{ "aggrate", dt_opt_rate, DTRACEOPT_AGGRATE },
+	{ "aggsortkey", dt_opt_runtime, DTRACEOPT_AGGSORTKEY },
+	{ "aggsortkeypos", dt_opt_runtime, DTRACEOPT_AGGSORTKEYPOS },
+	{ "aggsortpos", dt_opt_runtime, DTRACEOPT_AGGSORTPOS },
+	{ "aggsortrev", dt_opt_runtime, DTRACEOPT_AGGSORTREV },
+	{ "flowindent", dt_opt_runtime, DTRACEOPT_FLOWINDENT },
+	{ "quiet", dt_opt_runtime, DTRACEOPT_QUIET },
+	{ "rawbytes", dt_opt_runtime, DTRACEOPT_RAWBYTES },
+	{ "stackindent", dt_opt_runtime, DTRACEOPT_STACKINDENT },
+	{ "switchrate", dt_opt_rate, DTRACEOPT_SWITCHRATE },
+	{ NULL, NULL, 0 }
+};
+
+int
+dtrace_getopt(dtrace_hdl_t *dtp, const char *opt, dtrace_optval_t *val)
+{
+	const dt_option_t *op;
+
+	if (opt == NULL)
+		return (dt_set_errno(dtp, EINVAL));
+
+	/*
+	 * We only need to search the run-time options -- it's not legal
+	 * to get the values of compile-time options.
+	 */
+	for (op = _dtrace_rtoptions; op->o_name != NULL; op++) {
+		if (strcmp(op->o_name, opt) == 0) {
+			*val = dtp->dt_options[op->o_option];
+			return (0);
+		}
+	}
+
+	for (op = _dtrace_drtoptions; op->o_name != NULL; op++) {
+		if (strcmp(op->o_name, opt) == 0) {
+			*val = dtp->dt_options[op->o_option];
+			return (0);
+		}
+	}
+
+	return (dt_set_errno(dtp, EDT_BADOPTNAME));
+}
+
+int
+dtrace_setopt(dtrace_hdl_t *dtp, const char *opt, const char *val)
+{
+	const dt_option_t *op;
+
+	if (opt == NULL)
+		return (dt_set_errno(dtp, EINVAL));
+
+	for (op = _dtrace_ctoptions; op->o_name != NULL; op++) {
+		if (strcmp(op->o_name, opt) == 0)
+			return (op->o_func(dtp, val, op->o_option));
+	}
+
+	for (op = _dtrace_drtoptions; op->o_name != NULL; op++) {
+		if (strcmp(op->o_name, opt) == 0)
+			return (op->o_func(dtp, val, op->o_option));
+	}
+
+	for (op = _dtrace_rtoptions; op->o_name != NULL; op++) {
+		if (strcmp(op->o_name, opt) == 0) {
+			/*
+			 * Only dynamic run-time options may be set while
+			 * tracing is active.
+			 */
+			if (dtp->dt_active)
+				return (dt_set_errno(dtp, EDT_ACTIVE));
+
+			return (op->o_func(dtp, val, op->o_option));
+		}
+	}
+
+	return (dt_set_errno(dtp, EDT_BADOPTNAME));
+}