4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
28 #include <sys/sysmacros.h>
42 #include <sys/sysctl.h>
43 #include <libproc_compat.h>
54 } dtrace_probespecs[] = {
55 { offsetof(dtrace_probedesc_t, dtpd_provider), DTRACE_PROVNAMELEN },
56 { offsetof(dtrace_probedesc_t, dtpd_mod), DTRACE_MODNAMELEN },
57 { offsetof(dtrace_probedesc_t, dtpd_func), DTRACE_FUNCNAMELEN },
58 { offsetof(dtrace_probedesc_t, dtpd_name), DTRACE_NAMELEN }
62 dtrace_xstr2desc(dtrace_hdl_t *dtp, dtrace_probespec_t spec,
63 const char *s, int argc, char *const argv[], dtrace_probedesc_t *pdp)
65 size_t off, len, vlen, wlen;
66 const char *p, *q, *v, *w;
68 char buf[32]; /* for id_t as %d (see below) */
70 if (spec < DTRACE_PROBESPEC_NONE || spec > DTRACE_PROBESPEC_NAME)
71 return (dt_set_errno(dtp, EINVAL));
73 bzero(pdp, sizeof (dtrace_probedesc_t));
74 p = s + strlen(s) - 1;
77 for (len = 0; p >= s && *p != ':'; len++)
78 p--; /* move backward until we find a delimiter */
85 if ((v = strchr(q, '$')) != NULL && v < q + len) {
87 * Set vlen to the length of the variable name and then
88 * reset len to the length of the text prior to '$'. If
89 * the name begins with a digit, interpret it using the
90 * the argv[] array. Otherwise we look in dt_macros.
91 * For the moment, all dt_macros variables are of type
92 * id_t (see dtrace_update() for more details on that).
94 vlen = (size_t)(q + len - v);
95 len = (size_t)(v - q);
98 * If the variable string begins with $$, skip past the
99 * leading dollar sign since $ and $$ are equivalent
100 * macro reference operators in a probe description.
102 if (vlen > 2 && v[1] == '$') {
111 i = strtol(v + 1, (char **)&w, 10);
113 wlen = vlen - (w - v);
115 if (i < 0 || i >= argc || errno != 0)
116 return (dt_set_errno(dtp, EDT_BADSPCV));
121 if (yypcb != NULL && yypcb->pcb_sargv == argv)
122 yypcb->pcb_sflagv[i] |= DT_IDFLG_REF;
124 } else if (vlen > 1) {
125 char *vstr = alloca(vlen);
128 (void) strncpy(vstr, v + 1, vlen - 1);
129 vstr[vlen - 1] = '\0';
130 idp = dt_idhash_lookup(dtp->dt_macros, vstr);
133 return (dt_set_errno(dtp, EDT_BADSPCV));
136 vlen = snprintf(buf, 32, "%d", idp->di_id);
139 return (dt_set_errno(dtp, EDT_BADSPCV));
142 if (spec == DTRACE_PROBESPEC_NONE)
143 return (dt_set_errno(dtp, EDT_BADSPEC));
145 if (len + vlen >= dtrace_probespecs[spec].dtps_len)
146 return (dt_set_errno(dtp, ENAMETOOLONG));
148 off = dtrace_probespecs[spec--].dtps_offset;
149 bcopy(q, (char *)pdp + off, len);
150 bcopy(v, (char *)pdp + off + len, vlen);
151 bcopy(w, (char *)pdp + off + len + vlen, wlen);
154 pdp->dtpd_id = DTRACE_IDNONE;
159 dtrace_str2desc(dtrace_hdl_t *dtp, dtrace_probespec_t spec,
160 const char *s, dtrace_probedesc_t *pdp)
162 return (dtrace_xstr2desc(dtp, spec, s, 0, NULL, pdp));
166 dtrace_id2desc(dtrace_hdl_t *dtp, dtrace_id_t id, dtrace_probedesc_t *pdp)
168 bzero(pdp, sizeof (dtrace_probedesc_t));
171 if (dt_ioctl(dtp, DTRACEIOC_PROBES, pdp) == -1 ||
173 return (dt_set_errno(dtp, EDT_BADID));
179 dtrace_desc2str(const dtrace_probedesc_t *pdp, char *buf, size_t len)
181 if (pdp->dtpd_id == 0) {
182 (void) snprintf(buf, len, "%s:%s:%s:%s", pdp->dtpd_provider,
183 pdp->dtpd_mod, pdp->dtpd_func, pdp->dtpd_name);
185 (void) snprintf(buf, len, "%u", pdp->dtpd_id);
191 dtrace_attr2str(dtrace_attribute_t attr, char *buf, size_t len)
193 const char *name = dtrace_stability_name(attr.dtat_name);
194 const char *data = dtrace_stability_name(attr.dtat_data);
195 const char *class = dtrace_class_name(attr.dtat_class);
197 if (name == NULL || data == NULL || class == NULL)
198 return (NULL); /* one or more invalid attributes */
200 (void) snprintf(buf, len, "%s/%s/%s", name, data, class);
205 dt_getstrattr(char *p, char **qp)
212 if ((q = strchr(p, '/')) == NULL)
222 dtrace_str2attr(const char *str, dtrace_attribute_t *attr)
224 dtrace_stability_t s;
228 if (str == NULL || attr == NULL)
229 return (-1); /* invalid function arguments */
231 *attr = _dtrace_maxattr;
232 p = alloca(strlen(str) + 1);
233 (void) strcpy(p, str);
235 if ((p = dt_getstrattr(p, &q)) == NULL)
238 for (s = 0; s <= DTRACE_STABILITY_MAX; s++) {
239 if (strcasecmp(p, dtrace_stability_name(s)) == 0) {
245 if (s > DTRACE_STABILITY_MAX)
248 if ((p = dt_getstrattr(q, &q)) == NULL)
251 for (s = 0; s <= DTRACE_STABILITY_MAX; s++) {
252 if (strcasecmp(p, dtrace_stability_name(s)) == 0) {
258 if (s > DTRACE_STABILITY_MAX)
261 if ((p = dt_getstrattr(q, &q)) == NULL)
264 for (c = 0; c <= DTRACE_CLASS_MAX; c++) {
265 if (strcasecmp(p, dtrace_class_name(c)) == 0) {
266 attr->dtat_class = c;
271 if (c > DTRACE_CLASS_MAX || (p = dt_getstrattr(q, &q)) != NULL)
278 dtrace_stability_name(dtrace_stability_t s)
281 case DTRACE_STABILITY_INTERNAL: return ("Internal");
282 case DTRACE_STABILITY_PRIVATE: return ("Private");
283 case DTRACE_STABILITY_OBSOLETE: return ("Obsolete");
284 case DTRACE_STABILITY_EXTERNAL: return ("External");
285 case DTRACE_STABILITY_UNSTABLE: return ("Unstable");
286 case DTRACE_STABILITY_EVOLVING: return ("Evolving");
287 case DTRACE_STABILITY_STABLE: return ("Stable");
288 case DTRACE_STABILITY_STANDARD: return ("Standard");
289 default: return (NULL);
294 dtrace_class_name(dtrace_class_t c)
297 case DTRACE_CLASS_UNKNOWN: return ("Unknown");
298 case DTRACE_CLASS_CPU: return ("CPU");
299 case DTRACE_CLASS_PLATFORM: return ("Platform");
300 case DTRACE_CLASS_GROUP: return ("Group");
301 case DTRACE_CLASS_ISA: return ("ISA");
302 case DTRACE_CLASS_COMMON: return ("Common");
303 default: return (NULL);
308 dt_attr_min(dtrace_attribute_t a1, dtrace_attribute_t a2)
310 dtrace_attribute_t am;
312 am.dtat_name = MIN(a1.dtat_name, a2.dtat_name);
313 am.dtat_data = MIN(a1.dtat_data, a2.dtat_data);
314 am.dtat_class = MIN(a1.dtat_class, a2.dtat_class);
320 dt_attr_max(dtrace_attribute_t a1, dtrace_attribute_t a2)
322 dtrace_attribute_t am;
324 am.dtat_name = MAX(a1.dtat_name, a2.dtat_name);
325 am.dtat_data = MAX(a1.dtat_data, a2.dtat_data);
326 am.dtat_class = MAX(a1.dtat_class, a2.dtat_class);
332 * Compare two attributes and return an integer value in the following ranges:
334 * <0 if any of a1's attributes are less than a2's attributes
335 * =0 if all of a1's attributes are equal to a2's attributes
336 * >0 if all of a1's attributes are greater than or equal to a2's attributes
338 * To implement this function efficiently, we subtract a2's attributes from
339 * a1's to obtain a negative result if an a1 attribute is less than its a2
340 * counterpart. We then OR the intermediate results together, relying on the
341 * twos-complement property that if any result is negative, the bitwise union
342 * will also be negative since the highest bit will be set in the result.
345 dt_attr_cmp(dtrace_attribute_t a1, dtrace_attribute_t a2)
347 return (((int)a1.dtat_name - a2.dtat_name) |
348 ((int)a1.dtat_data - a2.dtat_data) |
349 ((int)a1.dtat_class - a2.dtat_class));
353 dt_attr_str(dtrace_attribute_t a, char *buf, size_t len)
355 static const char stability[] = "ipoxuesS";
356 static const char class[] = "uCpgIc";
358 if (a.dtat_name < sizeof (stability) &&
359 a.dtat_data < sizeof (stability) && a.dtat_class < sizeof (class)) {
360 (void) snprintf(buf, len, "[%c/%c/%c]", stability[a.dtat_name],
361 stability[a.dtat_data], class[a.dtat_class]);
363 (void) snprintf(buf, len, "[%u/%u/%u]",
364 a.dtat_name, a.dtat_data, a.dtat_class);
371 dt_version_num2str(dt_version_t v, char *buf, size_t len)
373 uint_t M = DT_VERSION_MAJOR(v);
374 uint_t m = DT_VERSION_MINOR(v);
375 uint_t u = DT_VERSION_MICRO(v);
378 (void) snprintf(buf, len, "%u.%u", M, m);
380 (void) snprintf(buf, len, "%u.%u.%u", M, m, u);
386 dt_version_str2num(const char *s, dt_version_t *vp)
388 int i = 0, n[3] = { 0, 0, 0 };
391 while ((c = *s++) != '\0') {
393 n[i] = n[i] * 10 + c - '0';
394 else if (c != '.' || i++ >= sizeof (n) / sizeof (n[0]) - 1)
398 if (n[0] > DT_VERSION_MAJMAX ||
399 n[1] > DT_VERSION_MINMAX ||
400 n[2] > DT_VERSION_MICMAX)
404 *vp = DT_VERSION_NUMBER(n[0], n[1], n[2]);
410 dt_version_defined(dt_version_t v)
414 for (i = 0; _dtrace_versions[i] != 0; i++) {
415 if (_dtrace_versions[i] == v)
423 dt_cpp_add_arg(dtrace_hdl_t *dtp, const char *str)
427 if (dtp->dt_cpp_argc == dtp->dt_cpp_args) {
428 int olds = dtp->dt_cpp_args;
430 char **argv = realloc(dtp->dt_cpp_argv, sizeof (char *) * news);
435 bzero(&argv[olds], sizeof (char *) * olds);
436 dtp->dt_cpp_argv = argv;
437 dtp->dt_cpp_args = news;
440 if ((arg = strdup(str)) == NULL)
443 assert(dtp->dt_cpp_argc < dtp->dt_cpp_args);
444 dtp->dt_cpp_argv[dtp->dt_cpp_argc++] = arg;
449 dt_cpp_pop_arg(dtrace_hdl_t *dtp)
453 if (dtp->dt_cpp_argc <= 1)
454 return (NULL); /* dt_cpp_argv[0] cannot be popped */
456 arg = dtp->dt_cpp_argv[--dtp->dt_cpp_argc];
457 dtp->dt_cpp_argv[dtp->dt_cpp_argc] = NULL;
464 dt_dprintf(const char *format, ...)
469 va_start(alist, format);
470 (void) fputs("libdtrace DEBUG: ", stderr);
471 (void) vfprintf(stderr, format, alist);
478 dt_ioctl(dtrace_hdl_t *dtp, int val, void *arg)
480 dt_ioctl(dtrace_hdl_t *dtp, u_long val, void *arg)
483 const dtrace_vector_t *v = dtp->dt_vector;
486 /* Avoid sign extension. */
491 return (v->dtv_ioctl(dtp->dt_varg, val, arg));
494 return (ioctl(dtp->dt_fd, val, arg));
501 dt_status(dtrace_hdl_t *dtp, processorid_t cpu)
503 const dtrace_vector_t *v = dtp->dt_vector;
507 return (p_online(cpu, P_STATUS));
510 size_t len = sizeof(maxid);
511 if (sysctlbyname("kern.smp.maxid", &maxid, &len, NULL, 0) != 0)
512 return (cpu == 0 ? 1 : -1);
514 return (cpu <= maxid ? 1 : -1);
518 return (v->dtv_status(dtp->dt_varg, cpu));
522 dt_sysconf(dtrace_hdl_t *dtp, int name)
524 const dtrace_vector_t *v = dtp->dt_vector;
527 return (sysconf(name));
529 return (v->dtv_sysconf(dtp->dt_varg, name));
533 * Wrapper around write(2) to handle partial writes. For maximum safety of
534 * output files and proper error reporting, we continuing writing in the
535 * face of partial writes until write(2) fails or 'buf' is completely written.
536 * We also record any errno in the specified dtrace_hdl_t as well as 'errno'.
539 dt_write(dtrace_hdl_t *dtp, int fd, const void *buf, size_t n)
545 if ((len = write(fd, buf, resid)) <= 0)
549 buf = (char *)buf + len;
552 if (resid == n && n != 0)
553 return (dt_set_errno(dtp, errno));
559 * This function handles all output from libdtrace, as well as the
560 * dtrace_sprintf() case. If we're here due to dtrace_sprintf(), then
561 * dt_sprintf_buflen will be non-zero; in this case, we sprintf into the
562 * specified buffer and return. Otherwise, if output is buffered (denoted by
563 * a NULL fp), we sprintf the desired output into the buffered buffer
564 * (expanding the buffer if required). If we don't satisfy either of these
565 * conditions (that is, if we are to actually generate output), then we call
566 * fprintf with the specified fp. In this case, we need to deal with one of
567 * the more annoying peculiarities of libc's printf routines: any failed
568 * write persistently sets an error flag inside the FILE causing every
569 * subsequent write to fail, but only the caller that initiated the error gets
570 * the errno. Since libdtrace clients often intercept SIGINT, this case is
571 * particularly frustrating since we don't want the EINTR on one attempt to
572 * write to the output file to preclude later attempts to write. This
573 * function therefore does a clearerr() if any error occurred, and saves the
574 * errno for the caller inside the specified dtrace_hdl_t.
578 dt_printf(dtrace_hdl_t *dtp, FILE *fp, const char *format, ...)
585 * On FreeBSD, check if output is currently being re-directed
586 * to another file. If so, output to that file instead of the
587 * one the caller has specified.
589 if (dtp->dt_freopen_fp != NULL)
590 fp = dtp->dt_freopen_fp;
593 va_start(ap, format);
595 if (dtp->dt_sprintf_buflen != 0) {
599 assert(dtp->dt_sprintf_buf != NULL);
601 buf = &dtp->dt_sprintf_buf[len = strlen(dtp->dt_sprintf_buf)];
602 len = dtp->dt_sprintf_buflen - len;
605 if ((n = vsnprintf(buf, len, format, ap)) < 0)
606 n = dt_set_errno(dtp, errno);
618 * It's not legal to use buffered ouput if there is not a
619 * handler for buffered output.
621 if (dtp->dt_bufhdlr == NULL) {
623 return (dt_set_errno(dtp, EDT_NOBUFFERED));
626 if (dtp->dt_buffered_buf == NULL) {
627 assert(dtp->dt_buffered_size == 0);
628 dtp->dt_buffered_size = 1;
629 dtp->dt_buffered_buf = malloc(dtp->dt_buffered_size);
631 if (dtp->dt_buffered_buf == NULL) {
633 return (dt_set_errno(dtp, EDT_NOMEM));
636 dtp->dt_buffered_offs = 0;
637 dtp->dt_buffered_buf[0] = '\0';
640 if ((needed = vsnprintf(NULL, 0, format, ap)) < 0) {
641 rval = dt_set_errno(dtp, errno);
654 assert(dtp->dt_buffered_offs < dtp->dt_buffered_size);
655 avail = dtp->dt_buffered_size - dtp->dt_buffered_offs;
657 if (needed + 1 < avail)
660 if ((newbuf = realloc(dtp->dt_buffered_buf,
661 dtp->dt_buffered_size << 1)) == NULL) {
663 return (dt_set_errno(dtp, EDT_NOMEM));
666 dtp->dt_buffered_buf = newbuf;
667 dtp->dt_buffered_size <<= 1;
670 if (vsnprintf(&dtp->dt_buffered_buf[dtp->dt_buffered_offs],
671 avail, format, ap) < 0) {
672 rval = dt_set_errno(dtp, errno);
677 dtp->dt_buffered_offs += needed;
678 assert(dtp->dt_buffered_buf[dtp->dt_buffered_offs] == '\0');
682 n = vfprintf(fp, format, ap);
688 return (dt_set_errno(dtp, errno));
695 dt_buffered_flush(dtrace_hdl_t *dtp, dtrace_probedata_t *pdata,
696 const dtrace_recdesc_t *rec, const dtrace_aggdata_t *agg, uint32_t flags)
698 dtrace_bufdata_t data;
700 if (dtp->dt_buffered_offs == 0)
703 data.dtbda_handle = dtp;
704 data.dtbda_buffered = dtp->dt_buffered_buf;
705 data.dtbda_probe = pdata;
706 data.dtbda_recdesc = rec;
707 data.dtbda_aggdata = agg;
708 data.dtbda_flags = flags;
710 if ((*dtp->dt_bufhdlr)(&data, dtp->dt_bufarg) == DTRACE_HANDLE_ABORT)
711 return (dt_set_errno(dtp, EDT_DIRABORT));
713 dtp->dt_buffered_offs = 0;
714 dtp->dt_buffered_buf[0] = '\0';
720 dt_buffered_destroy(dtrace_hdl_t *dtp)
722 free(dtp->dt_buffered_buf);
723 dtp->dt_buffered_buf = NULL;
724 dtp->dt_buffered_offs = 0;
725 dtp->dt_buffered_size = 0;
729 dt_zalloc(dtrace_hdl_t *dtp, size_t size)
733 if (size > 16 * 1024 * 1024) {
734 (void) dt_set_errno(dtp, EDT_NOMEM);
738 if ((data = malloc(size)) == NULL)
739 (void) dt_set_errno(dtp, EDT_NOMEM);
747 dt_alloc(dtrace_hdl_t *dtp, size_t size)
751 if (size > 16 * 1024 * 1024) {
752 (void) dt_set_errno(dtp, EDT_NOMEM);
756 if ((data = malloc(size)) == NULL)
757 (void) dt_set_errno(dtp, EDT_NOMEM);
763 dt_free(dtrace_hdl_t *dtp, void *data)
765 assert(dtp != NULL); /* ensure sane use of this interface */
770 dt_difo_free(dtrace_hdl_t *dtp, dtrace_difo_t *dp)
773 return; /* simplify caller code */
775 dt_free(dtp, dp->dtdo_buf);
776 dt_free(dtp, dp->dtdo_inttab);
777 dt_free(dtp, dp->dtdo_strtab);
778 dt_free(dtp, dp->dtdo_vartab);
779 dt_free(dtp, dp->dtdo_kreltab);
780 dt_free(dtp, dp->dtdo_ureltab);
781 dt_free(dtp, dp->dtdo_xlmtab);
787 * dt_gmatch() is similar to gmatch(3GEN) and dtrace(7D) globbing, but also
788 * implements the behavior that an empty pattern matches any string.
791 dt_gmatch(const char *s, const char *p)
793 return (p == NULL || *p == '\0' || gmatch(s, p));
797 dt_basename(char *str)
799 char *last = strrchr(str, '/');
808 * dt_popc() is a fast implementation of population count. The algorithm is
809 * from "Hacker's Delight" by Henry Warren, Jr with a 64-bit equivalent added.
815 x = x - ((x >> 1) & 0x55555555UL);
816 x = (x & 0x33333333UL) + ((x >> 2) & 0x33333333UL);
817 x = (x + (x >> 4)) & 0x0F0F0F0FUL;
823 x = x - ((x >> 1) & 0x5555555555555555ULL);
824 x = (x & 0x3333333333333333ULL) + ((x >> 2) & 0x3333333333333333ULL);
825 x = (x + (x >> 4)) & 0x0F0F0F0F0F0F0F0FULL;
834 * dt_popcb() is a bitmap-based version of population count that returns the
835 * number of one bits in the specified bitmap 'bp' at bit positions below 'n'.
838 dt_popcb(const ulong_t *bp, ulong_t n)
840 ulong_t maxb = n & BT_ULMASK;
841 ulong_t maxw = n >> BT_ULSHIFT;
847 for (w = 0; w < maxw; w++)
848 popc += dt_popc(bp[w]);
850 return (popc + dt_popc(bp[maxw] & ((1UL << maxb) - 1)));
858 dt_rw_read_held(pthread_rwlock_t *lock)
860 extern int _rw_read_held(struct _rwlock *);
861 return (_rw_read_held((struct _rwlock *)lock));
865 dt_rw_write_held(pthread_rwlock_t *lock)
867 extern int _rw_write_held(struct _rwlock *);
868 return (_rw_write_held((struct _rwlock *)lock));
873 dt_mutex_held(pthread_mutex_t *lock)
876 extern int _mutex_held(struct _lwp_mutex *);
877 return (_mutex_held((struct _lwp_mutex *)lock));
884 dt_string2str(char *s, char *str, int nbytes)
890 * Like snprintf(3C), we don't check the value of str if the
891 * number of bytes is 0.
897 (void) strncpy(str, s, nbytes - 1);
899 * Like snprintf(3C) (and unlike strncpy(3C)), we guarantee
900 * that the string is null-terminated.
902 str[nbytes - 1] = '\0';
904 (void) strcpy(str, s);
911 dtrace_addr2str(dtrace_hdl_t *dtp, uint64_t addr, char *str, int nbytes)
913 dtrace_syminfo_t dts;
916 size_t n = 20; /* for 0x%llx\0 */
920 if ((err = dtrace_lookup_by_addr(dtp, addr, &sym, &dts)) == 0)
921 n += strlen(dts.dts_object) + strlen(dts.dts_name) + 2; /* +` */
925 if (err == 0 && addr != sym.st_value) {
926 (void) snprintf(s, n, "%s`%s+0x%llx", dts.dts_object,
927 dts.dts_name, (u_longlong_t)addr - sym.st_value);
928 } else if (err == 0) {
929 (void) snprintf(s, n, "%s`%s",
930 dts.dts_object, dts.dts_name);
933 * We'll repeat the lookup, but this time we'll specify a NULL
934 * GElf_Sym -- indicating that we're only interested in the
937 if (dtrace_lookup_by_addr(dtp, addr, NULL, &dts) == 0) {
938 (void) snprintf(s, n, "%s`0x%llx", dts.dts_object,
941 (void) snprintf(s, n, "0x%llx", (u_longlong_t)addr);
945 return (dt_string2str(s, str, nbytes));
949 dtrace_uaddr2str(dtrace_hdl_t *dtp, pid_t pid,
950 uint64_t addr, char *str, int nbytes)
952 char name[PATH_MAX], objname[PATH_MAX], c[PATH_MAX * 2];
953 struct ps_prochandle *P = NULL;
958 P = dt_proc_grab(dtp, pid, PGRAB_RDONLY | PGRAB_FORCE, 0);
961 (void) snprintf(c, sizeof (c), "0x%llx", addr);
962 return (dt_string2str(c, str, nbytes));
965 dt_proc_lock(dtp, P);
967 if (Plookup_by_addr(P, addr, name, sizeof (name), &sym) == 0) {
968 (void) Pobjname(P, addr, objname, sizeof (objname));
970 obj = dt_basename(objname);
972 if (addr > sym.st_value) {
973 (void) snprintf(c, sizeof (c), "%s`%s+0x%llx", obj,
974 name, (u_longlong_t)(addr - sym.st_value));
976 (void) snprintf(c, sizeof (c), "%s`%s", obj, name);
978 } else if (Pobjname(P, addr, objname, sizeof (objname)) != 0) {
979 (void) snprintf(c, sizeof (c), "%s`0x%llx",
980 dt_basename(objname), addr);
982 (void) snprintf(c, sizeof (c), "0x%llx", addr);
985 dt_proc_unlock(dtp, P);
986 dt_proc_release(dtp, P);
988 return (dt_string2str(c, str, nbytes));