usr/src/lib/libdtrace/common/dtrace.h

   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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   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.
  12  *
  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]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*
  28  * Copyright (c) 2013 by Delphix. All rights reserved.
  29  * Copyright (c) 2013, Joyent, Inc. All rights reserved.
  30  */
  31
  32 #ifndef _DTRACE_H
  33 #define _DTRACE_H
  34
  35 #include <sys/dtrace.h>
  36 #include <stdarg.h>
  37 #include <stdio.h>
  38 #include <gelf.h>
  39
  40 #ifdef  __cplusplus
  41 extern "C" {
  42 #endif
  43
  44 /*
  45  * DTrace Dynamic Tracing Software: Library Interfaces
  46  *
  47  * Note: The contents of this file are private to the implementation of the
  48  * Solaris system and DTrace subsystem and are subject to change at any time
  49  * without notice.  Applications and drivers using these interfaces will fail
  50  * to run on future releases.  These interfaces should not be used for any
  51  * purpose except those expressly outlined in dtrace(7D) and libdtrace(3LIB).
  52  * Please refer to the "Solaris Dynamic Tracing Guide" for more information.
  53  */
  54
  55 #define DTRACE_VERSION  3               /* library ABI interface version */
  56
  57 struct ps_prochandle;
  58 typedef struct dtrace_hdl dtrace_hdl_t;
  59 typedef struct dtrace_prog dtrace_prog_t;
  60 typedef struct dtrace_vector dtrace_vector_t;
  61 typedef struct dtrace_aggdata dtrace_aggdata_t;
  62
  63 #define DTRACE_O_NODEV          0x01    /* do not open dtrace(7D) device */
  64 #define DTRACE_O_NOSYS          0x02    /* do not load /system/object modules */
  65 #define DTRACE_O_LP64           0x04    /* force D compiler to be LP64 */
  66 #define DTRACE_O_ILP32          0x08    /* force D compiler to be ILP32 */
  67 #define DTRACE_O_MASK           0x0f    /* mask of valid flags to dtrace_open */
  68
  69 extern dtrace_hdl_t *dtrace_open(int, int, int *);
  70 extern dtrace_hdl_t *dtrace_vopen(int, int, int *,
  71     const dtrace_vector_t *, void *);
  72
  73 extern int dtrace_go(dtrace_hdl_t *);
  74 extern int dtrace_stop(dtrace_hdl_t *);
  75 extern void dtrace_sleep(dtrace_hdl_t *);
  76 extern void dtrace_close(dtrace_hdl_t *);
  77
  78 extern int dtrace_errno(dtrace_hdl_t *);
  79 extern const char *dtrace_errmsg(dtrace_hdl_t *, int);
  80 extern const char *dtrace_faultstr(dtrace_hdl_t *, int);
  81 extern const char *dtrace_subrstr(dtrace_hdl_t *, int);
  82
  83 extern int dtrace_setopt(dtrace_hdl_t *, const char *, const char *);
  84 extern int dtrace_getopt(dtrace_hdl_t *, const char *, dtrace_optval_t *);
  85
  86 extern void dtrace_update(dtrace_hdl_t *);
  87 extern int dtrace_ctlfd(dtrace_hdl_t *);
  88
  89 /*
  90  * DTrace Program Interface
  91  *
  92  * DTrace programs can be created by compiling ASCII text files containing
  93  * D programs or by compiling in-memory C strings that specify a D program.
  94  * Once created, callers can examine the list of program statements and
  95  * enable the probes and actions described by these statements.
  96  */
  97
  98 typedef struct dtrace_proginfo {
  99         dtrace_attribute_t dpi_descattr; /* minimum probedesc attributes */
 100         dtrace_attribute_t dpi_stmtattr; /* minimum statement attributes */
 101         uint_t dpi_aggregates;  /* number of aggregates specified in program */
 102         uint_t dpi_recgens;     /* number of record generating probes in prog */
 103         uint_t dpi_matches;     /* number of probes matched by program */
 104         uint_t dpi_speculations; /* number of speculations specified in prog */
 105 } dtrace_proginfo_t;
 106
 107 #define DTRACE_C_DIFV   0x0001  /* DIF verbose mode: show each compiled DIFO */
 108 #define DTRACE_C_EMPTY  0x0002  /* Permit compilation of empty D source files */
 109 #define DTRACE_C_ZDEFS  0x0004  /* Permit probe defs that match zero probes */
 110 #define DTRACE_C_EATTR  0x0008  /* Error if program attributes less than min */
 111 #define DTRACE_C_CPP    0x0010  /* Preprocess input file with cpp(1) utility */
 112 #define DTRACE_C_KNODEF 0x0020  /* Permit unresolved kernel symbols in DIFO */
 113 #define DTRACE_C_UNODEF 0x0040  /* Permit unresolved user symbols in DIFO */
 114 #define DTRACE_C_PSPEC  0x0080  /* Intepret ambiguous specifiers as probes */
 115 #define DTRACE_C_ETAGS  0x0100  /* Prefix error messages with error tags */
 116 #define DTRACE_C_ARGREF 0x0200  /* Do not require all macro args to be used */
 117 #define DTRACE_C_DEFARG 0x0800  /* Use 0/"" as value for unspecified args */
 118 #define DTRACE_C_NOLIBS 0x1000  /* Do not process D system libraries */
 119 #define DTRACE_C_CTL    0x2000  /* Only process control directives */
 120 #define DTRACE_C_MASK   0x3bff  /* mask of all valid flags to dtrace_*compile */
 121
 122 extern dtrace_prog_t *dtrace_program_strcompile(dtrace_hdl_t *,
 123     const char *, dtrace_probespec_t, uint_t, int, char *const []);
 124
 125 extern dtrace_prog_t *dtrace_program_fcompile(dtrace_hdl_t *,
 126     FILE *, uint_t, int, char *const []);
 127
 128 extern int dtrace_program_exec(dtrace_hdl_t *, dtrace_prog_t *,
 129     dtrace_proginfo_t *);
 130 extern void dtrace_program_info(dtrace_hdl_t *, dtrace_prog_t *,
 131     dtrace_proginfo_t *);
 132
 133 #define DTRACE_D_STRIP  0x01    /* strip non-loadable sections from program */
 134 #define DTRACE_D_PROBES 0x02    /* include provider and probe definitions */
 135 #define DTRACE_D_MASK   0x03    /* mask of valid flags to dtrace_dof_create */
 136
 137 extern int dtrace_program_link(dtrace_hdl_t *, dtrace_prog_t *,
 138     uint_t, const char *, int, char *const []);
 139
 140 extern int dtrace_program_header(dtrace_hdl_t *, FILE *, const char *);
 141
 142 extern void *dtrace_dof_create(dtrace_hdl_t *, dtrace_prog_t *, uint_t);
 143 extern void dtrace_dof_destroy(dtrace_hdl_t *, void *);
 144
 145 extern void *dtrace_getopt_dof(dtrace_hdl_t *);
 146 extern void *dtrace_geterr_dof(dtrace_hdl_t *);
 147
 148 typedef struct dtrace_stmtdesc {
 149         dtrace_ecbdesc_t *dtsd_ecbdesc;         /* ECB description */
 150         dtrace_actdesc_t *dtsd_action;          /* action list */
 151         dtrace_actdesc_t *dtsd_action_last;     /* last action in action list */
 152         void *dtsd_aggdata;                     /* aggregation data */
 153         void *dtsd_fmtdata;                     /* type-specific output data */
 154         void *dtsd_strdata;                     /* type-specific string data */
 155         void (*dtsd_callback)();                /* callback function for EPID */
 156         void *dtsd_data;                        /* callback data pointer */
 157         dtrace_attribute_t dtsd_descattr;       /* probedesc attributes */
 158         dtrace_attribute_t dtsd_stmtattr;       /* statement attributes */
 159 } dtrace_stmtdesc_t;
 160
 161 typedef int dtrace_stmt_f(dtrace_hdl_t *, dtrace_prog_t *,
 162     dtrace_stmtdesc_t *, void *);
 163
 164 extern dtrace_stmtdesc_t *dtrace_stmt_create(dtrace_hdl_t *,
 165     dtrace_ecbdesc_t *);
 166 extern dtrace_actdesc_t *dtrace_stmt_action(dtrace_hdl_t *,
 167     dtrace_stmtdesc_t *);
 168 extern int dtrace_stmt_add(dtrace_hdl_t *, dtrace_prog_t *,
 169     dtrace_stmtdesc_t *);
 170 extern int dtrace_stmt_iter(dtrace_hdl_t *, dtrace_prog_t *,
 171     dtrace_stmt_f *, void *);
 172 extern void dtrace_stmt_destroy(dtrace_hdl_t *, dtrace_stmtdesc_t *);
 173
 174 /*
 175  * DTrace Data Consumption Interface
 176  */
 177 typedef enum {
 178         DTRACEFLOW_ENTRY,
 179         DTRACEFLOW_RETURN,
 180         DTRACEFLOW_NONE
 181 } dtrace_flowkind_t;
 182
 183 #define DTRACE_CONSUME_ERROR            -1      /* error while processing */
 184 #define DTRACE_CONSUME_THIS             0       /* consume this probe/record */
 185 #define DTRACE_CONSUME_NEXT             1       /* advance to next probe/rec */
 186 #define DTRACE_CONSUME_ABORT            2       /* abort consumption */
 187
 188 typedef struct dtrace_probedata {
 189         dtrace_hdl_t *dtpda_handle;             /* handle to DTrace library */
 190         dtrace_eprobedesc_t *dtpda_edesc;       /* enabled probe description */
 191         dtrace_probedesc_t *dtpda_pdesc;        /* probe description */
 192         processorid_t dtpda_cpu;                /* CPU for data */
 193         caddr_t dtpda_data;                     /* pointer to raw data */
 194         dtrace_flowkind_t dtpda_flow;           /* flow kind */
 195         const char *dtpda_prefix;               /* recommended flow prefix */
 196         int dtpda_indent;                       /* recommended flow indent */
 197 } dtrace_probedata_t;
 198
 199 typedef int dtrace_consume_probe_f(const dtrace_probedata_t *, void *);
 200 typedef int dtrace_consume_rec_f(const dtrace_probedata_t *,
 201     const dtrace_recdesc_t *, void *);
 202
 203 extern int dtrace_consume(dtrace_hdl_t *, FILE *,
 204     dtrace_consume_probe_f *, dtrace_consume_rec_f *, void *);
 205
 206 #define DTRACE_STATUS_NONE      0       /* no status; not yet time */
 207 #define DTRACE_STATUS_OKAY      1       /* status okay */
 208 #define DTRACE_STATUS_EXITED    2       /* exit() was called; tracing stopped */
 209 #define DTRACE_STATUS_FILLED    3       /* fill buffer filled; tracing stoped */
 210 #define DTRACE_STATUS_STOPPED   4       /* tracing already stopped */
 211
 212 extern int dtrace_status(dtrace_hdl_t *);
 213
 214 /*
 215  * DTrace Formatted Output Interfaces
 216  *
 217  * To format output associated with a given dtrace_stmtdesc, the caller can
 218  * invoke one of the following functions, passing the opaque dtsd_fmtdata and a
 219  * list of record descriptions.  These functions return either -1 to indicate
 220  * an error, or a positive integer indicating the number of records consumed.
 221  * For anonymous enablings, the consumer can use the dtrd_format member of
 222  * the record description to obtain a format description.  The dtfd_string
 223  * member of the format description may be passed to dtrace_print{fa}_create()
 224  * to create the opaque format data.
 225  */
 226 extern void *dtrace_printf_create(dtrace_hdl_t *, const char *);
 227 extern void *dtrace_printa_create(dtrace_hdl_t *, const char *);
 228 extern size_t dtrace_printf_format(dtrace_hdl_t *, void *, char *, size_t);
 229
 230 extern int dtrace_fprintf(dtrace_hdl_t *, FILE *, void *,
 231     const dtrace_probedata_t *, const dtrace_recdesc_t *, uint_t,
 232     const void *, size_t);
 233
 234 extern int dtrace_fprinta(dtrace_hdl_t *, FILE *, void *,
 235     const dtrace_probedata_t *, const dtrace_recdesc_t *, uint_t,
 236     const void *, size_t);
 237
 238 extern int dtrace_system(dtrace_hdl_t *, FILE *, void *,
 239     const dtrace_probedata_t *, const dtrace_recdesc_t *, uint_t,
 240     const void *, size_t);
 241
 242 extern int dtrace_freopen(dtrace_hdl_t *, FILE *, void *,
 243     const dtrace_probedata_t *, const dtrace_recdesc_t *, uint_t,
 244     const void *, size_t);
 245
 246 /*
 247  * Type-specific output printing
 248  *
 249  * The print() action will associate a string data record that is actually the
 250  * fully-qualified type name of the data traced by the DIFEXPR action.  This is
 251  * stored in the same 'format' record from the kernel, but we know by virtue of
 252  * the fact that the action is still DIFEXPR that it is actually a reference to
 253  * plain string data.
 254  */
 255 extern int dtrace_print(dtrace_hdl_t *, FILE *, const char *,
 256     caddr_t, size_t);
 257
 258 /*
 259  * DTrace Work Interface
 260  */
 261 typedef enum {
 262         DTRACE_WORKSTATUS_ERROR = -1,
 263         DTRACE_WORKSTATUS_OKAY,
 264         DTRACE_WORKSTATUS_DONE
 265 } dtrace_workstatus_t;
 266
 267 extern dtrace_workstatus_t dtrace_work(dtrace_hdl_t *, FILE *,
 268     dtrace_consume_probe_f *, dtrace_consume_rec_f *, void *);
 269
 270 /*
 271  * DTrace Handler Interface
 272  */
 273 #define DTRACE_HANDLE_ABORT             -1      /* abort current operation */
 274 #define DTRACE_HANDLE_OK                0       /* handled okay; continue */
 275
 276 typedef struct dtrace_errdata {
 277         dtrace_hdl_t *dteda_handle;             /* handle to DTrace library */
 278         dtrace_eprobedesc_t *dteda_edesc;       /* enabled probe inducing err */
 279         dtrace_probedesc_t *dteda_pdesc;        /* probe inducing error */
 280         processorid_t dteda_cpu;                /* CPU of error */
 281         int dteda_action;                       /* action inducing error */
 282         int dteda_offset;                       /* offset in DIFO of error */
 283         int dteda_fault;                        /* specific fault */
 284         uint64_t dteda_addr;                    /* address of fault, if any */
 285         const char *dteda_msg;                  /* preconstructed message */
 286 } dtrace_errdata_t;
 287
 288 typedef int dtrace_handle_err_f(const dtrace_errdata_t *, void *);
 289 extern int dtrace_handle_err(dtrace_hdl_t *, dtrace_handle_err_f *, void *);
 290
 291 typedef enum {
 292         DTRACEDROP_PRINCIPAL,                   /* drop to principal buffer */
 293         DTRACEDROP_AGGREGATION,                 /* drop to aggregation buffer */
 294         DTRACEDROP_DYNAMIC,                     /* dynamic drop */
 295         DTRACEDROP_DYNRINSE,                    /* dyn drop due to rinsing */
 296         DTRACEDROP_DYNDIRTY,                    /* dyn drop due to dirty */
 297         DTRACEDROP_SPEC,                        /* speculative drop */
 298         DTRACEDROP_SPECBUSY,                    /* spec drop due to busy */
 299         DTRACEDROP_SPECUNAVAIL,                 /* spec drop due to unavail */
 300         DTRACEDROP_STKSTROVERFLOW,              /* stack string tab overflow */
 301         DTRACEDROP_DBLERROR                     /* error in ERROR probe */
 302 } dtrace_dropkind_t;
 303
 304 typedef struct dtrace_dropdata {
 305         dtrace_hdl_t *dtdda_handle;             /* handle to DTrace library */
 306         processorid_t dtdda_cpu;                /* CPU, if any */
 307         dtrace_dropkind_t dtdda_kind;           /* kind of drop */
 308         uint64_t dtdda_drops;                   /* number of drops */
 309         uint64_t dtdda_total;                   /* total drops */
 310         const char *dtdda_msg;                  /* preconstructed message */
 311 } dtrace_dropdata_t;
 312
 313 typedef int dtrace_handle_drop_f(const dtrace_dropdata_t *, void *);
 314 extern int dtrace_handle_drop(dtrace_hdl_t *, dtrace_handle_drop_f *, void *);
 315
 316 typedef void dtrace_handle_proc_f(struct ps_prochandle *, const char *, void *);
 317 extern int dtrace_handle_proc(dtrace_hdl_t *, dtrace_handle_proc_f *, void *);
 318
 319 #define DTRACE_BUFDATA_AGGKEY           0x0001  /* aggregation key */
 320 #define DTRACE_BUFDATA_AGGVAL           0x0002  /* aggregation value */
 321 #define DTRACE_BUFDATA_AGGFORMAT        0x0004  /* aggregation format data */
 322 #define DTRACE_BUFDATA_AGGLAST          0x0008  /* last for this key/val */
 323
 324 typedef struct dtrace_bufdata {
 325         dtrace_hdl_t *dtbda_handle;             /* handle to DTrace library */
 326         const char *dtbda_buffered;             /* buffered output */
 327         dtrace_probedata_t *dtbda_probe;        /* probe data */
 328         const dtrace_recdesc_t *dtbda_recdesc;  /* record description */
 329         const dtrace_aggdata_t *dtbda_aggdata;  /* aggregation data, if agg. */
 330         uint32_t dtbda_flags;                   /* flags; see above */
 331 } dtrace_bufdata_t;
 332
 333 typedef int dtrace_handle_buffered_f(const dtrace_bufdata_t *, void *);
 334 extern int dtrace_handle_buffered(dtrace_hdl_t *,
 335     dtrace_handle_buffered_f *, void *);
 336
 337 typedef struct dtrace_setoptdata {
 338         dtrace_hdl_t *dtsda_handle;             /* handle to DTrace library */
 339         const dtrace_probedata_t *dtsda_probe;  /* probe data */
 340         const char *dtsda_option;               /* option that was set */
 341         dtrace_optval_t dtsda_oldval;           /* old value */
 342         dtrace_optval_t dtsda_newval;           /* new value */
 343 } dtrace_setoptdata_t;
 344
 345 typedef int dtrace_handle_setopt_f(const dtrace_setoptdata_t *, void *);
 346 extern int dtrace_handle_setopt(dtrace_hdl_t *,
 347     dtrace_handle_setopt_f *, void *);
 348
 349 /*
 350  * DTrace Aggregate Interface
 351  */
 352
 353 #define DTRACE_A_PERCPU         0x0001
 354 #define DTRACE_A_KEEPDELTA      0x0002
 355 #define DTRACE_A_ANONYMOUS      0x0004
 356 #define DTRACE_A_TOTAL          0x0008
 357 #define DTRACE_A_MINMAXBIN      0x0010
 358 #define DTRACE_A_HASNEGATIVES   0x0020
 359 #define DTRACE_A_HASPOSITIVES   0x0040
 360
 361 #define DTRACE_AGGZOOM_MAX              0.95    /* height of max bar */
 362
 363 #define DTRACE_AGGWALK_ERROR            -1      /* error while processing */
 364 #define DTRACE_AGGWALK_NEXT             0       /* proceed to next element */
 365 #define DTRACE_AGGWALK_ABORT            1       /* abort aggregation walk */
 366 #define DTRACE_AGGWALK_CLEAR            2       /* clear this element */
 367 #define DTRACE_AGGWALK_NORMALIZE        3       /* normalize this element */
 368 #define DTRACE_AGGWALK_DENORMALIZE      4       /* denormalize this element */
 369 #define DTRACE_AGGWALK_REMOVE           5       /* remove this element */
 370
 371 struct dtrace_aggdata {
 372         dtrace_hdl_t *dtada_handle;             /* handle to DTrace library */
 373         dtrace_aggdesc_t *dtada_desc;           /* aggregation description */
 374         dtrace_eprobedesc_t *dtada_edesc;       /* enabled probe description */
 375         dtrace_probedesc_t *dtada_pdesc;        /* probe description */
 376         caddr_t dtada_data;                     /* pointer to raw data */
 377         uint64_t dtada_normal;                  /* the normal -- 1 for denorm */
 378         size_t dtada_size;                      /* total size of the data */
 379         caddr_t dtada_delta;                    /* delta data, if available */
 380         caddr_t *dtada_percpu;                  /* per CPU data, if avail */
 381         caddr_t *dtada_percpu_delta;            /* per CPU delta, if avail */
 382         int64_t dtada_total;                    /* per agg total, if avail */
 383         uint16_t dtada_minbin;                  /* minimum bin, if avail */
 384         uint16_t dtada_maxbin;                  /* maximum bin, if avail */
 385         uint32_t dtada_flags;                   /* flags */
 386 };
 387
 388 typedef int dtrace_aggregate_f(const dtrace_aggdata_t *, void *);
 389 typedef int dtrace_aggregate_walk_f(dtrace_hdl_t *,
 390     dtrace_aggregate_f *, void *);
 391 typedef int dtrace_aggregate_walk_joined_f(const dtrace_aggdata_t **,
 392     const int, void *);
 393
 394 extern void dtrace_aggregate_clear(dtrace_hdl_t *);
 395 extern int dtrace_aggregate_snap(dtrace_hdl_t *);
 396 extern int dtrace_aggregate_print(dtrace_hdl_t *, FILE *,
 397     dtrace_aggregate_walk_f *);
 398
 399 extern int dtrace_aggregate_walk(dtrace_hdl_t *, dtrace_aggregate_f *, void *);
 400
 401 extern int dtrace_aggregate_walk_joined(dtrace_hdl_t *,
 402     dtrace_aggvarid_t *, int, dtrace_aggregate_walk_joined_f *, void *);
 403
 404 extern int dtrace_aggregate_walk_sorted(dtrace_hdl_t *,
 405     dtrace_aggregate_f *, void *);
 406
 407 extern int dtrace_aggregate_walk_keysorted(dtrace_hdl_t *,
 408     dtrace_aggregate_f *, void *);
 409
 410 extern int dtrace_aggregate_walk_valsorted(dtrace_hdl_t *,
 411     dtrace_aggregate_f *, void *);
 412
 413 extern int dtrace_aggregate_walk_keyvarsorted(dtrace_hdl_t *,
 414     dtrace_aggregate_f *, void *);
 415
 416 extern int dtrace_aggregate_walk_valvarsorted(dtrace_hdl_t *,
 417     dtrace_aggregate_f *, void *);
 418
 419 extern int dtrace_aggregate_walk_keyrevsorted(dtrace_hdl_t *,
 420     dtrace_aggregate_f *, void *);
 421
 422 extern int dtrace_aggregate_walk_valrevsorted(dtrace_hdl_t *,
 423     dtrace_aggregate_f *, void *);
 424
 425 extern int dtrace_aggregate_walk_keyvarrevsorted(dtrace_hdl_t *,
 426     dtrace_aggregate_f *, void *);
 427
 428 extern int dtrace_aggregate_walk_valvarrevsorted(dtrace_hdl_t *,
 429     dtrace_aggregate_f *, void *);
 430
 431 #define DTRACE_AGD_PRINTED      0x1     /* aggregation printed in program */
 432
 433 /*
 434  * DTrace Process Control Interface
 435  *
 436  * Library clients who wish to have libdtrace create or grab processes for
 437  * monitoring of their symbol table changes may use these interfaces to
 438  * request that libdtrace obtain control of the process using libproc.
 439  */
 440
 441 extern struct ps_prochandle *dtrace_proc_create(dtrace_hdl_t *,
 442     const char *, char *const *);
 443
 444 extern struct ps_prochandle *dtrace_proc_grab(dtrace_hdl_t *, pid_t, int);
 445 extern void dtrace_proc_release(dtrace_hdl_t *, struct ps_prochandle *);
 446 extern void dtrace_proc_continue(dtrace_hdl_t *, struct ps_prochandle *);
 447
 448 /*
 449  * DTrace Object, Symbol, and Type Interfaces
 450  *
 451  * Library clients can use libdtrace to perform symbol and C type information
 452  * lookups by symbol name, symbol address, or C type name, or to lookup meta-
 453  * information cached for each of the program objects in use by DTrace.  The
 454  * resulting struct contain pointers to arbitrary-length strings, including
 455  * object, symbol, and type names, that are persistent until the next call to
 456  * dtrace_update().  Once dtrace_update() is called, any cached values must
 457  * be flushed and not used subsequently by the client program.
 458  */
 459
 460 #define DTRACE_OBJ_EXEC  ((const char *)0L)     /* primary executable file */
 461 #define DTRACE_OBJ_RTLD  ((const char *)1L)     /* run-time link-editor */
 462 #define DTRACE_OBJ_CDEFS ((const char *)2L)     /* C include definitions */
 463 #define DTRACE_OBJ_DDEFS ((const char *)3L)     /* D program definitions */
 464 #define DTRACE_OBJ_EVERY ((const char *)-1L)    /* all known objects */
 465 #define DTRACE_OBJ_KMODS ((const char *)-2L)    /* all kernel objects */
 466 #define DTRACE_OBJ_UMODS ((const char *)-3L)    /* all user objects */
 467
 468 typedef struct dtrace_objinfo {
 469         const char *dto_name;                   /* object file scope name */
 470         const char *dto_file;                   /* object file path (if any) */
 471         int dto_id;                             /* object file id (if any) */
 472         uint_t dto_flags;                       /* object flags (see below) */
 473         GElf_Addr dto_text_va;                  /* address of text section */
 474         GElf_Xword dto_text_size;               /* size of text section */
 475         GElf_Addr dto_data_va;                  /* address of data section */
 476         GElf_Xword dto_data_size;               /* size of data section */
 477         GElf_Addr dto_bss_va;                   /* address of BSS */
 478         GElf_Xword dto_bss_size;                /* size of BSS */
 479 } dtrace_objinfo_t;
 480
 481 #define DTRACE_OBJ_F_KERNEL     0x1             /* object is a kernel module */
 482 #define DTRACE_OBJ_F_PRIMARY    0x2             /* object is a primary module */
 483
 484 typedef int dtrace_obj_f(dtrace_hdl_t *, const dtrace_objinfo_t *, void *);
 485
 486 extern int dtrace_object_iter(dtrace_hdl_t *, dtrace_obj_f *, void *);
 487 extern int dtrace_object_info(dtrace_hdl_t *, const char *, dtrace_objinfo_t *);
 488
 489 typedef struct dtrace_syminfo {
 490         const char *dts_object;                 /* object name */
 491         const char *dts_name;                   /* symbol name */
 492         ulong_t dts_id;                         /* symbol id */
 493 } dtrace_syminfo_t;
 494
 495 extern int dtrace_lookup_by_name(dtrace_hdl_t *, const char *, const char *,
 496     GElf_Sym *, dtrace_syminfo_t *);
 497
 498 extern int dtrace_lookup_by_addr(dtrace_hdl_t *, GElf_Addr addr,
 499     GElf_Sym *, dtrace_syminfo_t *);
 500
 501 typedef struct dtrace_typeinfo {
 502         const char *dtt_object;                 /* object containing type */
 503         ctf_file_t *dtt_ctfp;                   /* CTF container handle */
 504         ctf_id_t dtt_type;                      /* CTF type identifier */
 505         uint_t dtt_flags;                       /* Misc. flags */
 506 } dtrace_typeinfo_t;
 507
 508 #define DTT_FL_USER     0x1                     /* user type */
 509
 510 extern int dtrace_lookup_by_type(dtrace_hdl_t *, const char *, const char *,
 511     dtrace_typeinfo_t *);
 512
 513 extern int dtrace_symbol_type(dtrace_hdl_t *, const GElf_Sym *,
 514     const dtrace_syminfo_t *, dtrace_typeinfo_t *);
 515
 516 extern int dtrace_type_strcompile(dtrace_hdl_t *,
 517     const char *, dtrace_typeinfo_t *);
 518
 519 extern int dtrace_type_fcompile(dtrace_hdl_t *,
 520     FILE *, dtrace_typeinfo_t *);
 521
 522 /*
 523  * DTrace Probe Interface
 524  *
 525  * Library clients can use these functions to iterate over the set of available
 526  * probe definitions and inquire as to their attributes.  The probe iteration
 527  * interfaces report probes that are declared as well as those from dtrace(7D).
 528  */
 529 typedef struct dtrace_probeinfo {
 530         dtrace_attribute_t dtp_attr;            /* name attributes */
 531         dtrace_attribute_t dtp_arga;            /* arg attributes */
 532         const dtrace_typeinfo_t *dtp_argv;      /* arg types */
 533         int dtp_argc;                           /* arg count */
 534 } dtrace_probeinfo_t;
 535
 536 typedef int dtrace_probe_f(dtrace_hdl_t *, const dtrace_probedesc_t *, void *);
 537
 538 extern int dtrace_probe_iter(dtrace_hdl_t *,
 539     const dtrace_probedesc_t *pdp, dtrace_probe_f *, void *);
 540
 541 extern int dtrace_probe_info(dtrace_hdl_t *,
 542     const dtrace_probedesc_t *, dtrace_probeinfo_t *);
 543
 544 /*
 545  * DTrace Vector Interface
 546  *
 547  * The DTrace library normally speaks directly to dtrace(7D).  However,
 548  * this communication may be vectored elsewhere.  Consumers who wish to
 549  * perform a vectored open must fill in the vector, and use the dtrace_vopen()
 550  * entry point to obtain a library handle.
 551  */
 552 struct dtrace_vector {
 553         int (*dtv_ioctl)(void *, int, void *);
 554         int (*dtv_lookup_by_addr)(void *, GElf_Addr, GElf_Sym *,
 555             dtrace_syminfo_t *);
 556         int (*dtv_status)(void *, processorid_t);
 557         long (*dtv_sysconf)(void *, int);
 558 };
 559
 560 /*
 561  * DTrace Utility Functions
 562  *
 563  * Library clients can use these functions to convert addresses strings, to
 564  * convert between string and integer probe descriptions and the
 565  * dtrace_probedesc_t representation, and to perform similar conversions on
 566  * stability attributes.
 567  */
 568 extern int dtrace_addr2str(dtrace_hdl_t *, uint64_t, char *, int);
 569 extern int dtrace_uaddr2str(dtrace_hdl_t *, pid_t, uint64_t, char *, int);
 570
 571 extern int dtrace_xstr2desc(dtrace_hdl_t *, dtrace_probespec_t,
 572     const char *, int, char *const [], dtrace_probedesc_t *);
 573
 574 extern int dtrace_str2desc(dtrace_hdl_t *, dtrace_probespec_t,
 575     const char *, dtrace_probedesc_t *);
 576
 577 extern int dtrace_id2desc(dtrace_hdl_t *, dtrace_id_t, dtrace_probedesc_t *);
 578
 579 #define DTRACE_DESC2STR_MAX     1024    /* min buf size for dtrace_desc2str() */
 580
 581 extern char *dtrace_desc2str(const dtrace_probedesc_t *, char *, size_t);
 582
 583 #define DTRACE_ATTR2STR_MAX     64      /* min buf size for dtrace_attr2str() */
 584
 585 extern char *dtrace_attr2str(dtrace_attribute_t, char *, size_t);
 586 extern int dtrace_str2attr(const char *, dtrace_attribute_t *);
 587
 588 extern const char *dtrace_stability_name(dtrace_stability_t);
 589 extern const char *dtrace_class_name(dtrace_class_t);
 590
 591 extern int dtrace_provider_modules(dtrace_hdl_t *, const char **, int);
 592
 593 extern const char *const _dtrace_version;
 594 extern int _dtrace_debug;
 595
 596 #ifdef  __cplusplus
 597 }
 598 #endif
 599
 600 #endif  /* _DTRACE_H */