xref: /illumos-gate/usr/src/lib/libdtrace/common/dtrace.h (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #ifndef	_DTRACE_H
28 #define	_DTRACE_H
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 #include <sys/dtrace.h>
33 #include <stdarg.h>
34 #include <stdio.h>
35 #include <gelf.h>
36 
37 #ifdef	__cplusplus
38 extern "C" {
39 #endif
40 
41 /*
42  * DTrace Dynamic Tracing Software: Library Interfaces
43  *
44  * Note: The contents of this file are private to the implementation of the
45  * Solaris system and DTrace subsystem and are subject to change at any time
46  * without notice.  Applications and drivers using these interfaces will fail
47  * to run on future releases.  These interfaces should not be used for any
48  * purpose except those expressly outlined in dtrace(7D) and libdtrace(3LIB).
49  * Please refer to the "Solaris Dynamic Tracing Guide" for more information.
50  */
51 
52 #define	DTRACE_VERSION	1		/* library ABI interface version */
53 
54 struct ps_prochandle;
55 typedef struct dtrace_hdl dtrace_hdl_t;
56 typedef struct dtrace_prog dtrace_prog_t;
57 typedef struct dtrace_vector dtrace_vector_t;
58 typedef struct dtrace_aggdata dtrace_aggdata_t;
59 typedef int64_t dtrace_aggvarid_t;
60 
61 #define	DTRACE_O_NODEV		0x01	/* do not open dtrace(7D) device */
62 #define	DTRACE_O_NOSYS		0x02	/* do not load /system/object modules */
63 #define	DTRACE_O_LP64		0x04	/* force D compiler to be LP64 */
64 #define	DTRACE_O_ILP32		0x08	/* force D compiler to be ILP32 */
65 #define	DTRACE_O_MASK		0x0f	/* mask of valid flags to dtrace_open */
66 
67 extern dtrace_hdl_t *dtrace_open(int, int, int *);
68 extern dtrace_hdl_t *dtrace_vopen(int, int, int *,
69     const dtrace_vector_t *, void *);
70 
71 extern int dtrace_go(dtrace_hdl_t *);
72 extern int dtrace_stop(dtrace_hdl_t *);
73 extern void dtrace_sleep(dtrace_hdl_t *);
74 extern void dtrace_close(dtrace_hdl_t *);
75 
76 extern int dtrace_errno(dtrace_hdl_t *);
77 extern const char *dtrace_errmsg(dtrace_hdl_t *, int);
78 extern const char *dtrace_faultstr(dtrace_hdl_t *, int);
79 
80 extern int dtrace_setopt(dtrace_hdl_t *, const char *, const char *);
81 extern int dtrace_getopt(dtrace_hdl_t *, const char *, dtrace_optval_t *);
82 
83 extern void dtrace_update(dtrace_hdl_t *);
84 extern int dtrace_ctlfd(dtrace_hdl_t *);
85 
86 /*
87  * DTrace Program Interface
88  *
89  * DTrace programs can be created by compiling ASCII text files containing
90  * D programs, by compiling C strings that specify a D program, or by
91  * manually constructing statements and adding them to an existing program.
92  * The dtrace_program_create() function can be used to create an empty program.
93  * Once created, callers can examine the list of program statements and
94  * enable the probes and actions described by these statements.
95  */
96 
97 typedef struct dtrace_proginfo {
98 	dtrace_attribute_t dpi_descattr; /* minimum probedesc attributes */
99 	dtrace_attribute_t dpi_stmtattr; /* minimum statement attributes */
100 	uint_t dpi_aggregates;	/* number of aggregates specified in program */
101 	uint_t dpi_recgens;	/* number of record generating probes in prog */
102 	uint_t dpi_matches;	/* number of probes matched by program */
103 	uint_t dpi_speculations; /* number of speculations specified in prog */
104 } dtrace_proginfo_t;
105 
106 #define	DTRACE_C_DIFV	0x0001	/* DIF verbose mode: show each compiled DIFO */
107 #define	DTRACE_C_EMPTY	0x0002	/* Permit compilation of empty D source files */
108 #define	DTRACE_C_ZDEFS	0x0004	/* Permit probe defs that match zero probes */
109 #define	DTRACE_C_EATTR	0x0008	/* Error if program attributes less than min */
110 #define	DTRACE_C_CPP	0x0010	/* Preprocess input file with cpp(1) utility */
111 #define	DTRACE_C_KNODEF	0x0020	/* Permit unresolved kernel symbols in DIFO */
112 #define	DTRACE_C_UNODEF	0x0040	/* Permit unresolved user symbols in DIFO */
113 #define	DTRACE_C_PSPEC	0x0080	/* Intepret ambiguous specifiers as probes */
114 #define	DTRACE_C_ETAGS	0x0100	/* Prefix error messages with error tags */
115 #define	DTRACE_C_ARGREF	0x0200	/* Do not require all macro args to be used */
116 #define	DTRACE_C_DEFARG	0x0800	/* Use 0/"" as value for unspecified args */
117 #define	DTRACE_C_NOLIBS	0x1000	/* Do not process D system libraries */
118 #define	DTRACE_C_MASK	0x1bff	/* mask of all valid flags to dtrace_*compile */
119 
120 extern dtrace_prog_t *dtrace_program_strcompile(dtrace_hdl_t *,
121     const char *, dtrace_probespec_t, uint_t, int, char *const []);
122 
123 extern dtrace_prog_t *dtrace_program_fcompile(dtrace_hdl_t *,
124     FILE *, uint_t, int, char *const []);
125 
126 extern int dtrace_program_exec(dtrace_hdl_t *, dtrace_prog_t *,
127     dtrace_proginfo_t *);
128 extern void dtrace_program_info(dtrace_hdl_t *, dtrace_prog_t *,
129     dtrace_proginfo_t *);
130 
131 #define	DTRACE_D_STRIP	0x01	/* strip non-loadable sections from program */
132 #define	DTRACE_D_PROBES	0x02	/* include provider and probe definitions */
133 #define	DTRACE_D_MASK	0x03	/* mask of valid flags to dtrace_dof_create */
134 
135 extern int dtrace_program_link(dtrace_hdl_t *, dtrace_prog_t *,
136     uint_t, const char *, int, char *const []);
137 
138 extern void *dtrace_dof_create(dtrace_hdl_t *, dtrace_prog_t *, uint_t);
139 extern void dtrace_dof_destroy(dtrace_hdl_t *, void *);
140 
141 extern void *dtrace_getopt_dof(dtrace_hdl_t *);
142 extern void *dtrace_geterr_dof(dtrace_hdl_t *);
143 
144 extern dtrace_prog_t *dtrace_program_create(dtrace_hdl_t *);
145 extern void dtrace_program_destroy(dtrace_hdl_t *, dtrace_prog_t *);
146 
147 typedef struct dtrace_stmtdesc {
148 	dtrace_ecbdesc_t *dtsd_ecbdesc;		/* ECB description */
149 	dtrace_actdesc_t *dtsd_action;		/* action list */
150 	dtrace_actdesc_t *dtsd_action_last;	/* last action in action list */
151 	void *dtsd_aggdata;			/* aggregation data */
152 	void *dtsd_fmtdata;			/* type-specific output data */
153 	void (*dtsd_callback)();		/* callback function for EPID */
154 	void *dtsd_data;			/* callback data pointer */
155 	dtrace_attribute_t dtsd_descattr;	/* probedesc attributes */
156 	dtrace_attribute_t dtsd_stmtattr;	/* statement attributes */
157 } dtrace_stmtdesc_t;
158 
159 typedef int dtrace_stmt_f(dtrace_hdl_t *, dtrace_prog_t *,
160     dtrace_stmtdesc_t *, void *);
161 
162 extern dtrace_stmtdesc_t *dtrace_stmt_create(dtrace_hdl_t *,
163     dtrace_ecbdesc_t *);
164 extern dtrace_actdesc_t *dtrace_stmt_action(dtrace_hdl_t *,
165     dtrace_stmtdesc_t *);
166 extern int dtrace_stmt_add(dtrace_hdl_t *, dtrace_prog_t *,
167     dtrace_stmtdesc_t *);
168 extern int dtrace_stmt_iter(dtrace_hdl_t *, dtrace_prog_t *,
169     dtrace_stmt_f *, void *);
170 extern void dtrace_stmt_destroy(dtrace_stmtdesc_t *);
171 
172 extern dtrace_ecbdesc_t *dtrace_ecbdesc_create(dtrace_hdl_t *,
173     const dtrace_probedesc_t *);
174 extern void dtrace_ecbdesc_hold(dtrace_ecbdesc_t *);
175 extern void dtrace_ecbdesc_release(dtrace_ecbdesc_t *);
176 
177 /*
178  * DTrace Data Consumption Interface
179  */
180 typedef enum {
181 	DTRACEFLOW_ENTRY,
182 	DTRACEFLOW_RETURN,
183 	DTRACEFLOW_NONE
184 } dtrace_flowkind_t;
185 
186 #define	DTRACE_CONSUME_ERROR		-1	/* error while processing */
187 #define	DTRACE_CONSUME_THIS		0	/* consume this probe/record */
188 #define	DTRACE_CONSUME_NEXT		1	/* advance to next probe/rec */
189 #define	DTRACE_CONSUME_ABORT		2	/* abort consumption */
190 
191 typedef struct dtrace_probedata {
192 	dtrace_hdl_t *dtpda_handle;		/* handle to DTrace library */
193 	dtrace_eprobedesc_t *dtpda_edesc;	/* enabled probe description */
194 	dtrace_probedesc_t *dtpda_pdesc;	/* probe description */
195 	processorid_t dtpda_cpu;		/* CPU for data */
196 	caddr_t dtpda_data;			/* pointer to raw data */
197 	dtrace_flowkind_t dtpda_flow;		/* flow kind */
198 	const char *dtpda_prefix;		/* recommended flow prefix */
199 	int dtpda_indent;			/* recommended flow indent */
200 } dtrace_probedata_t;
201 
202 typedef int dtrace_consume_probe_f(const dtrace_probedata_t *, void *);
203 typedef int dtrace_consume_rec_f(const dtrace_probedata_t *,
204     const dtrace_recdesc_t *, void *);
205 
206 extern int dtrace_consume(dtrace_hdl_t *, FILE *,
207     dtrace_consume_probe_f *, dtrace_consume_rec_f *, void *);
208 
209 #define	DTRACE_STATUS_NONE	0	/* no status; not yet time */
210 #define	DTRACE_STATUS_OKAY	1	/* status okay */
211 #define	DTRACE_STATUS_EXITED	2	/* exit() was called; tracing stopped */
212 #define	DTRACE_STATUS_FILLED	3	/* fill buffer filled; tracing stoped */
213 #define	DTRACE_STATUS_STOPPED	4	/* tracing already stopped */
214 
215 extern int dtrace_status(dtrace_hdl_t *);
216 
217 /*
218  * DTrace Formatted Output Interfaces
219  *
220  * To format output associated with a given dtrace_stmtdesc, the caller can
221  * invoke one of the following functions, passing the opaque dtsd_fmtdata and a
222  * list of record descriptions.  These functions return either -1 to indicate
223  * an error, or a positive integer indicating the number of records consumed.
224  * For anonymous enablings, the consumer can use the dtrd_format member of
225  * the record description to obtain a format description.  The dtfd_string
226  * member of the format description may be passed to dtrace_print{fa}_create()
227  * to create the opaque format data.
228  */
229 extern void *dtrace_printf_create(dtrace_hdl_t *, const char *);
230 extern void *dtrace_printa_create(dtrace_hdl_t *, const char *);
231 extern size_t dtrace_printf_format(dtrace_hdl_t *, void *, char *, size_t);
232 
233 extern int dtrace_fprintf(dtrace_hdl_t *, FILE *, void *,
234     const dtrace_probedata_t *, const dtrace_recdesc_t *, uint_t,
235     const void *, size_t);
236 
237 extern int dtrace_fprinta(dtrace_hdl_t *, FILE *, void *,
238     const dtrace_probedata_t *, const dtrace_recdesc_t *, uint_t,
239     const void *, size_t);
240 
241 extern int dtrace_system(dtrace_hdl_t *, FILE *, void *,
242     const dtrace_probedata_t *, const dtrace_recdesc_t *, uint_t,
243     const void *, size_t);
244 
245 extern int dtrace_freopen(dtrace_hdl_t *, FILE *, void *,
246     const dtrace_probedata_t *, const dtrace_recdesc_t *, uint_t,
247     const void *, size_t);
248 
249 /*
250  * DTrace Work Interface
251  */
252 typedef enum {
253 	DTRACE_WORKSTATUS_ERROR = -1,
254 	DTRACE_WORKSTATUS_OKAY,
255 	DTRACE_WORKSTATUS_DONE
256 } dtrace_workstatus_t;
257 
258 extern dtrace_workstatus_t dtrace_work(dtrace_hdl_t *, FILE *,
259     dtrace_consume_probe_f *, dtrace_consume_rec_f *, void *);
260 
261 /*
262  * DTrace Handler Interface
263  */
264 #define	DTRACE_HANDLE_ABORT		-1	/* abort current operation */
265 #define	DTRACE_HANDLE_OK		0	/* handled okay; continue */
266 
267 typedef struct dtrace_errdata {
268 	dtrace_hdl_t *dteda_handle;		/* handle to DTrace library */
269 	dtrace_eprobedesc_t *dteda_edesc;	/* enabled probe inducing err */
270 	dtrace_probedesc_t *dteda_pdesc;	/* probe inducing error */
271 	processorid_t dteda_cpu;		/* CPU of error */
272 	int dteda_action;			/* action inducing error */
273 	int dteda_offset;			/* offset in DIFO of error */
274 	int dteda_fault;			/* specific fault */
275 	uint64_t dteda_addr;			/* address of fault, if any */
276 	const char *dteda_msg;			/* preconstructed message */
277 } dtrace_errdata_t;
278 
279 typedef int dtrace_handle_err_f(dtrace_errdata_t *, void *);
280 extern int dtrace_handle_err(dtrace_hdl_t *, dtrace_handle_err_f *, void *);
281 
282 typedef enum {
283 	DTRACEDROP_PRINCIPAL,			/* drop to principal buffer */
284 	DTRACEDROP_AGGREGATION,			/* drop to aggregation buffer */
285 	DTRACEDROP_DYNAMIC,			/* dynamic drop */
286 	DTRACEDROP_DYNRINSE,			/* dyn drop due to rinsing */
287 	DTRACEDROP_DYNDIRTY,			/* dyn drop due to dirty */
288 	DTRACEDROP_SPEC,			/* speculative drop */
289 	DTRACEDROP_SPECBUSY,			/* spec drop due to busy */
290 	DTRACEDROP_SPECUNAVAIL			/* spec drop due to unavail */
291 } dtrace_dropkind_t;
292 
293 typedef struct dtrace_dropdata {
294 	dtrace_hdl_t *dtdda_handle;		/* handle to DTrace library */
295 	processorid_t dtdda_cpu;		/* CPU, if any */
296 	dtrace_dropkind_t dtdda_kind;		/* kind of drop */
297 	uint64_t dtdda_drops;			/* number of drops */
298 	uint64_t dtdda_total;			/* total drops */
299 	const char *dtdda_msg;			/* preconstructed message */
300 } dtrace_dropdata_t;
301 
302 typedef int dtrace_handle_drop_f(dtrace_dropdata_t *, void *);
303 extern int dtrace_handle_drop(dtrace_hdl_t *, dtrace_handle_drop_f *, void *);
304 
305 typedef void dtrace_handle_proc_f(struct ps_prochandle *, void *);
306 extern int dtrace_handle_proc(dtrace_hdl_t *, dtrace_handle_proc_f *, void *);
307 
308 typedef struct dtrace_bufdata {
309 	dtrace_hdl_t *dtbda_handle;		/* handle to DTrace library */
310 	const char *dtbda_buffered;		/* buffered output */
311 	dtrace_probedata_t *dtbda_probe;	/* probe data */
312 	dtrace_recdesc_t *dtbda_recdesc;	/* record description */
313 	dtrace_aggdata_t *dtbda_aggdata;	/* aggregation data, if agg. */
314 } dtrace_bufdata_t;
315 
316 typedef int dtrace_handle_buffered_f(dtrace_bufdata_t *, void *);
317 extern int dtrace_handle_buffered(dtrace_hdl_t *,
318     dtrace_handle_buffered_f *, void *);
319 
320 /*
321  * DTrace Aggregate Interface
322  */
323 
324 #define	DTRACE_A_PERCPU		0x0001
325 #define	DTRACE_A_KEEPDELTA	0x0002
326 #define	DTRACE_A_ANONYMOUS	0x0004
327 
328 #define	DTRACE_AGGWALK_ERROR		-1	/* error while processing */
329 #define	DTRACE_AGGWALK_NEXT		0	/* proceed to next element */
330 #define	DTRACE_AGGWALK_ABORT		1	/* abort aggregation walk */
331 #define	DTRACE_AGGWALK_CLEAR		2	/* clear this element */
332 #define	DTRACE_AGGWALK_NORMALIZE	3	/* normalize this element */
333 #define	DTRACE_AGGWALK_DENORMALIZE	4	/* denormalize this element */
334 #define	DTRACE_AGGWALK_REMOVE		5	/* remove this element */
335 
336 struct dtrace_aggdata {
337 	dtrace_hdl_t *dtada_handle;		/* handle to DTrace library */
338 	dtrace_aggdesc_t *dtada_desc;		/* aggregation description */
339 	dtrace_eprobedesc_t *dtada_edesc;	/* enabled probe description */
340 	dtrace_probedesc_t *dtada_pdesc;	/* probe description */
341 	caddr_t dtada_data;			/* pointer to raw data */
342 	uint64_t dtada_normal;			/* the normal -- 1 for denorm */
343 	size_t dtada_size;			/* total size of the data */
344 	caddr_t dtada_delta;			/* delta data, if available */
345 	caddr_t *dtada_percpu;			/* per CPU data, if avail */
346 	caddr_t *dtada_percpu_delta;		/* per CPU delta, if avail */
347 };
348 
349 typedef int dtrace_aggregate_f(dtrace_aggdata_t *, void *);
350 typedef int dtrace_aggregate_walk_f(dtrace_hdl_t *,
351     dtrace_aggregate_f *, void *);
352 
353 extern void dtrace_aggregate_clear(dtrace_hdl_t *);
354 extern int dtrace_aggregate_snap(dtrace_hdl_t *);
355 extern int dtrace_aggregate_print(dtrace_hdl_t *, FILE *,
356     dtrace_aggregate_walk_f *);
357 
358 extern int dtrace_aggregate_walk(dtrace_hdl_t *, dtrace_aggregate_f *, void *);
359 
360 extern int dtrace_aggregate_walk_keysorted(dtrace_hdl_t *,
361     dtrace_aggregate_f *, void *);
362 
363 extern int dtrace_aggregate_walk_valsorted(dtrace_hdl_t *,
364     dtrace_aggregate_f *, void *);
365 
366 extern int dtrace_aggregate_walk_keyvarsorted(dtrace_hdl_t *,
367     dtrace_aggregate_f *, void *);
368 
369 extern int dtrace_aggregate_walk_valvarsorted(dtrace_hdl_t *,
370     dtrace_aggregate_f *, void *);
371 
372 extern int dtrace_aggregate_walk_keyrevsorted(dtrace_hdl_t *,
373     dtrace_aggregate_f *, void *);
374 
375 extern int dtrace_aggregate_walk_valrevsorted(dtrace_hdl_t *,
376     dtrace_aggregate_f *, void *);
377 
378 extern int dtrace_aggregate_walk_keyvarrevsorted(dtrace_hdl_t *,
379     dtrace_aggregate_f *, void *);
380 
381 extern int dtrace_aggregate_walk_valvarrevsorted(dtrace_hdl_t *,
382     dtrace_aggregate_f *, void *);
383 
384 #define	DTRACE_AGD_PRINTED	0x1	/* aggregation printed in program */
385 
386 /*
387  * DTrace Process Control Interface
388  *
389  * Library clients who wish to have libdtrace create or grab processes for
390  * monitoring of their symbol table changes may use these interfaces to
391  * request that libdtrace obtain control of the process using libproc.
392  */
393 
394 extern struct ps_prochandle *dtrace_proc_create(dtrace_hdl_t *,
395     const char *, char *const *);
396 
397 extern struct ps_prochandle *dtrace_proc_grab(dtrace_hdl_t *, pid_t, int);
398 extern void dtrace_proc_release(dtrace_hdl_t *, struct ps_prochandle *);
399 extern void dtrace_proc_continue(dtrace_hdl_t *, struct ps_prochandle *);
400 
401 /*
402  * DTrace DIF Object (DIFO) Interface
403  *
404  * Library clients who wish to create their own custom DIF programs can use
405  * the functions below to create a DIFO from a C string containing a D
406  * expression statement.  Clients may also create raw DIF on-the-fly without
407  * invoking the D compiler by simply constructing the dtrace_difo_t by hand.
408  */
409 
410 extern dtrace_difo_t *dtrace_difo_create(dtrace_hdl_t *, const char *);
411 extern void dtrace_difo_print(const dtrace_difo_t *, FILE *);
412 extern void dtrace_difo_hold(dtrace_difo_t *);
413 extern void dtrace_difo_release(dtrace_difo_t *);
414 
415 /*
416  * DTrace Object, Symbol, and Type Interfaces
417  *
418  * Library clients can use libdtrace to perform symbol and C type information
419  * lookups by symbol name, symbol address, or C type name, or to lookup meta-
420  * information cached for each of the program objects in use by DTrace.  The
421  * resulting struct contain pointers to arbitrary-length strings, including
422  * object, symbol, and type names, that are persistent until the next call to
423  * dtrace_update().  Once dtrace_update() is called, any cached values must
424  * be flushed and not used subsequently by the client program.
425  */
426 
427 #define	DTRACE_OBJ_EXEC	 ((const char *)0L)	/* primary executable file */
428 #define	DTRACE_OBJ_RTLD	 ((const char *)1L)	/* run-time link-editor */
429 #define	DTRACE_OBJ_CDEFS ((const char *)2L)	/* C include definitions */
430 #define	DTRACE_OBJ_DDEFS ((const char *)3L)	/* D program definitions */
431 #define	DTRACE_OBJ_EVERY ((const char *)-1L)	/* all known objects */
432 #define	DTRACE_OBJ_KMODS ((const char *)-2L)	/* all kernel objects */
433 #define	DTRACE_OBJ_UMODS ((const char *)-3L)	/* all user objects */
434 
435 typedef struct dtrace_objinfo {
436 	const char *dto_name;			/* object file scope name */
437 	const char *dto_file;			/* object file path (if any) */
438 	int dto_id;				/* object file id (if any) */
439 	uint_t dto_flags;			/* object flags (see below) */
440 	GElf_Addr dto_text_va;			/* address of text section */
441 	GElf_Xword dto_text_size;		/* size of text section */
442 	GElf_Addr dto_data_va;			/* address of data section */
443 	GElf_Xword dto_data_size;		/* size of data section */
444 	GElf_Addr dto_bss_va;			/* address of BSS */
445 	GElf_Xword dto_bss_size;		/* size of BSS */
446 } dtrace_objinfo_t;
447 
448 #define	DTRACE_OBJ_F_KERNEL	0x1		/* object is a kernel module */
449 #define	DTRACE_OBJ_F_PRIMARY	0x2		/* object is a primary module */
450 
451 typedef int dtrace_obj_f(dtrace_hdl_t *, const dtrace_objinfo_t *, void *);
452 
453 extern int dtrace_object_iter(dtrace_hdl_t *, dtrace_obj_f *, void *);
454 extern int dtrace_object_info(dtrace_hdl_t *, const char *, dtrace_objinfo_t *);
455 
456 typedef struct dtrace_syminfo {
457 	const char *dts_object;			/* object name */
458 	const char *dts_name;			/* symbol name */
459 	ulong_t dts_id;				/* symbol id */
460 } dtrace_syminfo_t;
461 
462 extern int dtrace_lookup_by_name(dtrace_hdl_t *, const char *, const char *,
463     GElf_Sym *, dtrace_syminfo_t *);
464 
465 extern int dtrace_lookup_by_addr(dtrace_hdl_t *, GElf_Addr addr,
466     GElf_Sym *, dtrace_syminfo_t *);
467 
468 typedef struct dtrace_typeinfo {
469 	const char *dtt_object;			/* object containing type */
470 	ctf_file_t *dtt_ctfp;			/* CTF container handle */
471 	ctf_id_t dtt_type;			/* CTF type identifier */
472 } dtrace_typeinfo_t;
473 
474 extern int dtrace_lookup_by_type(dtrace_hdl_t *, const char *, const char *,
475     dtrace_typeinfo_t *);
476 
477 extern int dtrace_symbol_type(dtrace_hdl_t *, const GElf_Sym *,
478     const dtrace_syminfo_t *, dtrace_typeinfo_t *);
479 
480 extern int dtrace_type_strcompile(dtrace_hdl_t *,
481     const char *, dtrace_typeinfo_t *);
482 
483 extern int dtrace_type_fcompile(dtrace_hdl_t *,
484     FILE *, dtrace_typeinfo_t *);
485 
486 /*
487  * DTrace Probe Interface
488  *
489  * Library clients can use these functions to iterate over the set of available
490  * probe definitions and inquire as to their attributes.  The probe iteration
491  * interfaces report probes that are declared as well as those from dtrace(7D).
492  */
493 typedef struct dtrace_probeinfo {
494 	dtrace_attribute_t dtp_attr;		/* name attributes */
495 	dtrace_attribute_t dtp_arga;		/* arg attributes */
496 	const dtrace_typeinfo_t *dtp_argv;	/* arg types */
497 	int dtp_argc;				/* arg count */
498 } dtrace_probeinfo_t;
499 
500 typedef int dtrace_probe_f(dtrace_hdl_t *, const dtrace_probedesc_t *, void *);
501 
502 extern int dtrace_probe_iter(dtrace_hdl_t *,
503     const dtrace_probedesc_t *pdp, dtrace_probe_f *, void *);
504 
505 extern int dtrace_probe_info(dtrace_hdl_t *,
506     const dtrace_probedesc_t *, dtrace_probeinfo_t *);
507 
508 /*
509  * DTrace Vector Interface
510  *
511  * The DTrace library normally speaks directly to dtrace(7D).  However,
512  * this communication may be vectored elsewhere.  Consumers who wish to
513  * perform a vectored open must fill in the vector, and use the dtrace_vopen()
514  * entry point to obtain a library handle.
515  */
516 struct dtrace_vector {
517 	int (*dtv_ioctl)(void *, int, void *);
518 	int (*dtv_lookup_by_addr)(void *, GElf_Addr, GElf_Sym *,
519 	    dtrace_syminfo_t *);
520 	int (*dtv_status)(void *, processorid_t);
521 	long (*dtv_sysconf)(void *, int);
522 };
523 
524 /*
525  * DTrace Utility Functions
526  *
527  * Library clients can use these functions to convert between string and
528  * integer probe descriptions and the dtrace_probedesc_t representation
529  * and to perform similar conversions on stability attributes.
530  */
531 extern int dtrace_xstr2desc(dtrace_hdl_t *, dtrace_probespec_t,
532     const char *, int, char *const [], dtrace_probedesc_t *);
533 
534 extern int dtrace_str2desc(dtrace_hdl_t *, dtrace_probespec_t,
535     const char *, dtrace_probedesc_t *);
536 
537 extern int dtrace_id2desc(dtrace_hdl_t *, dtrace_id_t, dtrace_probedesc_t *);
538 
539 #define	DTRACE_DESC2STR_MAX	1024	/* min buf size for dtrace_desc2str() */
540 
541 extern char *dtrace_desc2str(const dtrace_probedesc_t *, char *, size_t);
542 
543 #define	DTRACE_ATTR2STR_MAX	64	/* min buf size for dtrace_attr2str() */
544 
545 extern char *dtrace_attr2str(dtrace_attribute_t, char *, size_t);
546 extern int dtrace_str2attr(const char *, dtrace_attribute_t *);
547 
548 extern const char *dtrace_stability_name(dtrace_stability_t);
549 extern const char *dtrace_class_name(dtrace_class_t);
550 
551 extern int dtrace_provider_modules(dtrace_hdl_t *, const char **, int);
552 
553 extern const char *const _dtrace_version;
554 extern int _dtrace_debug;
555 
556 #ifdef	__cplusplus
557 }
558 #endif
559 
560 #endif	/* _DTRACE_H */
561