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 (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
25 * Copyright (c) 2013, Joyent Inc. All rights reserved.
26 * Copyright 2015 Gary Mills
27 */
28
29 /*
30 * DTrace D Language Compiler
31 *
32 * The code in this source file implements the main engine for the D language
33 * compiler. The driver routine for the compiler is dt_compile(), below. The
34 * compiler operates on either stdio FILEs or in-memory strings as its input
35 * and can produce either dtrace_prog_t structures from a D program or a single
36 * dtrace_difo_t structure from a D expression. Multiple entry points are
37 * provided as wrappers around dt_compile() for the various input/output pairs.
38 * The compiler itself is implemented across the following source files:
39 *
40 * dt_lex.l - lex scanner
41 * dt_grammar.y - yacc grammar
42 * dt_parser.c - parse tree creation and semantic checking
43 * dt_decl.c - declaration stack processing
44 * dt_xlator.c - D translator lookup and creation
45 * dt_ident.c - identifier and symbol table routines
46 * dt_pragma.c - #pragma processing and D pragmas
47 * dt_printf.c - D printf() and printa() argument checking and processing
48 * dt_cc.c - compiler driver and dtrace_prog_t construction
49 * dt_cg.c - DIF code generator
50 * dt_as.c - DIF assembler
51 * dt_dof.c - dtrace_prog_t -> DOF conversion
52 *
53 * Several other source files provide collections of utility routines used by
54 * these major files. The compiler itself is implemented in multiple passes:
55 *
56 * (1) The input program is scanned and parsed by dt_lex.l and dt_grammar.y
57 * and parse tree nodes are constructed using the routines in dt_parser.c.
58 * This node construction pass is described further in dt_parser.c.
59 *
60 * (2) The parse tree is "cooked" by assigning each clause a context (see the
61 * routine dt_setcontext(), below) based on its probe description and then
62 * recursively descending the tree performing semantic checking. The cook
63 * routines are also implemented in dt_parser.c and described there.
64 *
65 * (3) For actions that are DIF expression statements, the DIF code generator
66 * and assembler are invoked to create a finished DIFO for the statement.
67 *
68 * (4) The dtrace_prog_t data structures for the program clauses and actions
69 * are built, containing pointers to any DIFOs created in step (3).
70 *
71 * (5) The caller invokes a routine in dt_dof.c to convert the finished program
72 * into DOF format for use in anonymous tracing or enabling in the kernel.
73 *
74 * In the implementation, steps 2-4 are intertwined in that they are performed
75 * in order for each clause as part of a loop that executes over the clauses.
76 *
77 * The D compiler currently implements nearly no optimization. The compiler
78 * implements integer constant folding as part of pass (1), and a set of very
79 * simple peephole optimizations as part of pass (3). As with any C compiler,
80 * a large number of optimizations are possible on both the intermediate data
81 * structures and the generated DIF code. These possibilities should be
82 * investigated in the context of whether they will have any substantive effect
83 * on the overall DTrace probe effect before they are undertaken.
84 */
85
86 #include <sys/types.h>
87 #include <sys/wait.h>
88 #include <sys/sysmacros.h>
89
90 #include <assert.h>
91 #include <strings.h>
92 #include <signal.h>
93 #include <unistd.h>
94 #include <stdlib.h>
95 #include <stdio.h>
96 #include <errno.h>
97 #include <ucontext.h>
98 #include <limits.h>
99 #include <ctype.h>
100 #include <dirent.h>
101 #include <dt_module.h>
102 #include <dt_program.h>
103 #include <dt_provider.h>
104 #include <dt_printf.h>
105 #include <dt_pid.h>
106 #include <dt_grammar.h>
107 #include <dt_ident.h>
108 #include <dt_string.h>
109 #include <dt_impl.h>
110
111 static const dtrace_diftype_t dt_void_rtype = {
112 DIF_TYPE_CTF, CTF_K_INTEGER, 0, 0, 0
113 };
114
115 static const dtrace_diftype_t dt_int_rtype = {
116 DIF_TYPE_CTF, CTF_K_INTEGER, 0, 0, sizeof (uint64_t)
117 };
118
119 static void *dt_compile(dtrace_hdl_t *, int, dtrace_probespec_t, void *,
120 uint_t, int, char *const[], FILE *, const char *);
121
122 /*ARGSUSED*/
123 static int
124 dt_idreset(dt_idhash_t *dhp, dt_ident_t *idp, void *ignored)
125 {
126 idp->di_flags &= ~(DT_IDFLG_REF | DT_IDFLG_MOD |
127 DT_IDFLG_DIFR | DT_IDFLG_DIFW);
128 return (0);
129 }
130
131 /*ARGSUSED*/
132 static int
133 dt_idpragma(dt_idhash_t *dhp, dt_ident_t *idp, void *ignored)
134 {
135 yylineno = idp->di_lineno;
136 xyerror(D_PRAGMA_UNUSED, "unused #pragma %s\n", (char *)idp->di_iarg);
137 return (0);
138 }
139
140 static dtrace_stmtdesc_t *
141 dt_stmt_create(dtrace_hdl_t *dtp, dtrace_ecbdesc_t *edp,
142 dtrace_attribute_t descattr, dtrace_attribute_t stmtattr)
143 {
144 dtrace_stmtdesc_t *sdp = dtrace_stmt_create(dtp, edp);
145
146 if (sdp == NULL)
147 longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
148
149 assert(yypcb->pcb_stmt == NULL);
150 yypcb->pcb_stmt = sdp;
151
152 sdp->dtsd_descattr = descattr;
153 sdp->dtsd_stmtattr = stmtattr;
154
155 return (sdp);
156 }
157
158 static dtrace_actdesc_t *
159 dt_stmt_action(dtrace_hdl_t *dtp, dtrace_stmtdesc_t *sdp)
160 {
161 dtrace_actdesc_t *new;
162
163 if ((new = dtrace_stmt_action(dtp, sdp)) == NULL)
164 longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
165
166 return (new);
167 }
168
169 /*
170 * Utility function to determine if a given action description is destructive.
171 * The dtdo_destructive bit is set for us by the DIF assembler (see dt_as.c).
172 */
173 static int
174 dt_action_destructive(const dtrace_actdesc_t *ap)
175 {
176 return (DTRACEACT_ISDESTRUCTIVE(ap->dtad_kind) || (ap->dtad_kind ==
177 DTRACEACT_DIFEXPR && ap->dtad_difo->dtdo_destructive));
178 }
179
180 static void
181 dt_stmt_append(dtrace_stmtdesc_t *sdp, const dt_node_t *dnp)
182 {
183 dtrace_ecbdesc_t *edp = sdp->dtsd_ecbdesc;
184 dtrace_actdesc_t *ap, *tap;
185 int commit = 0;
186 int speculate = 0;
187 int datarec = 0;
188
189 /*
190 * Make sure that the new statement jibes with the rest of the ECB.
191 */
192 for (ap = edp->dted_action; ap != NULL; ap = ap->dtad_next) {
193 if (ap->dtad_kind == DTRACEACT_COMMIT) {
194 if (commit) {
195 dnerror(dnp, D_COMM_COMM, "commit( ) may "
196 "not follow commit( )\n");
197 }
198
199 if (datarec) {
200 dnerror(dnp, D_COMM_DREC, "commit( ) may "
201 "not follow data-recording action(s)\n");
202 }
203
204 for (tap = ap; tap != NULL; tap = tap->dtad_next) {
205 if (!DTRACEACT_ISAGG(tap->dtad_kind))
206 continue;
207
208 dnerror(dnp, D_AGG_COMM, "aggregating actions "
209 "may not follow commit( )\n");
210 }
211
212 commit = 1;
213 continue;
214 }
215
216 if (ap->dtad_kind == DTRACEACT_SPECULATE) {
217 if (speculate) {
218 dnerror(dnp, D_SPEC_SPEC, "speculate( ) may "
219 "not follow speculate( )\n");
220 }
221
222 if (commit) {
223 dnerror(dnp, D_SPEC_COMM, "speculate( ) may "
224 "not follow commit( )\n");
225 }
226
227 if (datarec) {
228 dnerror(dnp, D_SPEC_DREC, "speculate( ) may "
229 "not follow data-recording action(s)\n");
230 }
231
232 speculate = 1;
233 continue;
234 }
235
236 if (DTRACEACT_ISAGG(ap->dtad_kind)) {
237 if (speculate) {
238 dnerror(dnp, D_AGG_SPEC, "aggregating actions "
239 "may not follow speculate( )\n");
240 }
241
242 datarec = 1;
243 continue;
244 }
245
246 if (speculate) {
247 if (dt_action_destructive(ap)) {
248 dnerror(dnp, D_ACT_SPEC, "destructive actions "
249 "may not follow speculate( )\n");
250 }
251
252 if (ap->dtad_kind == DTRACEACT_EXIT) {
253 dnerror(dnp, D_EXIT_SPEC, "exit( ) may not "
254 "follow speculate( )\n");
255 }
256 }
257
258 /*
259 * Exclude all non data-recording actions.
260 */
261 if (dt_action_destructive(ap) ||
262 ap->dtad_kind == DTRACEACT_DISCARD)
263 continue;
264
265 if (ap->dtad_kind == DTRACEACT_DIFEXPR &&
266 ap->dtad_difo->dtdo_rtype.dtdt_kind == DIF_TYPE_CTF &&
267 ap->dtad_difo->dtdo_rtype.dtdt_size == 0)
268 continue;
269
270 if (commit) {
271 dnerror(dnp, D_DREC_COMM, "data-recording actions "
272 "may not follow commit( )\n");
273 }
274
275 if (!speculate)
276 datarec = 1;
277 }
278
279 if (dtrace_stmt_add(yypcb->pcb_hdl, yypcb->pcb_prog, sdp) != 0)
280 longjmp(yypcb->pcb_jmpbuf, dtrace_errno(yypcb->pcb_hdl));
281
282 if (yypcb->pcb_stmt == sdp)
283 yypcb->pcb_stmt = NULL;
284 }
285
286 /*
287 * For the first element of an aggregation tuple or for printa(), we create a
288 * simple DIF program that simply returns the immediate value that is the ID
289 * of the aggregation itself. This could be optimized in the future by
290 * creating a new in-kernel dtad_kind that just returns an integer.
291 */
292 static void
293 dt_action_difconst(dtrace_actdesc_t *ap, uint_t id, dtrace_actkind_t kind)
294 {
295 dtrace_hdl_t *dtp = yypcb->pcb_hdl;
296 dtrace_difo_t *dp = dt_zalloc(dtp, sizeof (dtrace_difo_t));
297
298 if (dp == NULL)
299 longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
300
301 dp->dtdo_buf = dt_alloc(dtp, sizeof (dif_instr_t) * 2);
302 dp->dtdo_inttab = dt_alloc(dtp, sizeof (uint64_t));
303
304 if (dp->dtdo_buf == NULL || dp->dtdo_inttab == NULL) {
305 dt_difo_free(dtp, dp);
306 longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
307 }
308
309 dp->dtdo_buf[0] = DIF_INSTR_SETX(0, 1); /* setx DIF_INTEGER[0], %r1 */
310 dp->dtdo_buf[1] = DIF_INSTR_RET(1); /* ret %r1 */
311 dp->dtdo_len = 2;
312 dp->dtdo_inttab[0] = id;
313 dp->dtdo_intlen = 1;
314 dp->dtdo_rtype = dt_int_rtype;
315
316 ap->dtad_difo = dp;
317 ap->dtad_kind = kind;
318 }
319
320 static void
321 dt_action_clear(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
322 {
323 dt_ident_t *aid;
324 dtrace_actdesc_t *ap;
325 dt_node_t *anp;
326
327 char n[DT_TYPE_NAMELEN];
328 int argc = 0;
329
330 for (anp = dnp->dn_args; anp != NULL; anp = anp->dn_list)
331 argc++; /* count up arguments for error messages below */
332
333 if (argc != 1) {
334 dnerror(dnp, D_CLEAR_PROTO,
335 "%s( ) prototype mismatch: %d args passed, 1 expected\n",
336 dnp->dn_ident->di_name, argc);
337 }
338
339 anp = dnp->dn_args;
340 assert(anp != NULL);
341
342 if (anp->dn_kind != DT_NODE_AGG) {
343 dnerror(dnp, D_CLEAR_AGGARG,
344 "%s( ) argument #1 is incompatible with prototype:\n"
345 "\tprototype: aggregation\n\t argument: %s\n",
346 dnp->dn_ident->di_name,
347 dt_node_type_name(anp, n, sizeof (n)));
348 }
349
350 aid = anp->dn_ident;
351
352 if (aid->di_gen == dtp->dt_gen && !(aid->di_flags & DT_IDFLG_MOD)) {
353 dnerror(dnp, D_CLEAR_AGGBAD,
354 "undefined aggregation: @%s\n", aid->di_name);
355 }
356
357 ap = dt_stmt_action(dtp, sdp);
358 dt_action_difconst(ap, anp->dn_ident->di_id, DTRACEACT_LIBACT);
359 ap->dtad_arg = DT_ACT_CLEAR;
360 }
361
362 static void
363 dt_action_normalize(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
364 {
365 dt_ident_t *aid;
366 dtrace_actdesc_t *ap;
367 dt_node_t *anp, *normal;
368 int denormal = (strcmp(dnp->dn_ident->di_name, "denormalize") == 0);
369
370 char n[DT_TYPE_NAMELEN];
371 int argc = 0;
372
373 for (anp = dnp->dn_args; anp != NULL; anp = anp->dn_list)
374 argc++; /* count up arguments for error messages below */
375
376 if ((denormal && argc != 1) || (!denormal && argc != 2)) {
377 dnerror(dnp, D_NORMALIZE_PROTO,
378 "%s( ) prototype mismatch: %d args passed, %d expected\n",
379 dnp->dn_ident->di_name, argc, denormal ? 1 : 2);
380 }
381
382 anp = dnp->dn_args;
383 assert(anp != NULL);
384
385 if (anp->dn_kind != DT_NODE_AGG) {
386 dnerror(dnp, D_NORMALIZE_AGGARG,
387 "%s( ) argument #1 is incompatible with prototype:\n"
388 "\tprototype: aggregation\n\t argument: %s\n",
389 dnp->dn_ident->di_name,
390 dt_node_type_name(anp, n, sizeof (n)));
391 }
392
393 if ((normal = anp->dn_list) != NULL && !dt_node_is_scalar(normal)) {
394 dnerror(dnp, D_NORMALIZE_SCALAR,
395 "%s( ) argument #2 must be of scalar type\n",
396 dnp->dn_ident->di_name);
397 }
398
399 aid = anp->dn_ident;
400
401 if (aid->di_gen == dtp->dt_gen && !(aid->di_flags & DT_IDFLG_MOD)) {
402 dnerror(dnp, D_NORMALIZE_AGGBAD,
403 "undefined aggregation: @%s\n", aid->di_name);
404 }
405
406 ap = dt_stmt_action(dtp, sdp);
407 dt_action_difconst(ap, anp->dn_ident->di_id, DTRACEACT_LIBACT);
408
409 if (denormal) {
410 ap->dtad_arg = DT_ACT_DENORMALIZE;
411 return;
412 }
413
414 ap->dtad_arg = DT_ACT_NORMALIZE;
415
416 assert(normal != NULL);
417 ap = dt_stmt_action(dtp, sdp);
418 dt_cg(yypcb, normal);
419
420 ap->dtad_difo = dt_as(yypcb);
421 ap->dtad_kind = DTRACEACT_LIBACT;
422 ap->dtad_arg = DT_ACT_NORMALIZE;
423 }
424
425 static void
426 dt_action_trunc(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
427 {
428 dt_ident_t *aid;
429 dtrace_actdesc_t *ap;
430 dt_node_t *anp, *trunc;
431
432 char n[DT_TYPE_NAMELEN];
433 int argc = 0;
434
435 for (anp = dnp->dn_args; anp != NULL; anp = anp->dn_list)
436 argc++; /* count up arguments for error messages below */
437
438 if (argc > 2 || argc < 1) {
439 dnerror(dnp, D_TRUNC_PROTO,
440 "%s( ) prototype mismatch: %d args passed, %s expected\n",
441 dnp->dn_ident->di_name, argc,
442 argc < 1 ? "at least 1" : "no more than 2");
443 }
444
445 anp = dnp->dn_args;
446 assert(anp != NULL);
447 trunc = anp->dn_list;
448
449 if (anp->dn_kind != DT_NODE_AGG) {
450 dnerror(dnp, D_TRUNC_AGGARG,
451 "%s( ) argument #1 is incompatible with prototype:\n"
452 "\tprototype: aggregation\n\t argument: %s\n",
453 dnp->dn_ident->di_name,
454 dt_node_type_name(anp, n, sizeof (n)));
455 }
456
457 if (argc == 2) {
458 assert(trunc != NULL);
459 if (!dt_node_is_scalar(trunc)) {
460 dnerror(dnp, D_TRUNC_SCALAR,
461 "%s( ) argument #2 must be of scalar type\n",
462 dnp->dn_ident->di_name);
463 }
464 }
465
466 aid = anp->dn_ident;
467
468 if (aid->di_gen == dtp->dt_gen && !(aid->di_flags & DT_IDFLG_MOD)) {
469 dnerror(dnp, D_TRUNC_AGGBAD,
470 "undefined aggregation: @%s\n", aid->di_name);
471 }
472
473 ap = dt_stmt_action(dtp, sdp);
474 dt_action_difconst(ap, anp->dn_ident->di_id, DTRACEACT_LIBACT);
475 ap->dtad_arg = DT_ACT_TRUNC;
476
477 ap = dt_stmt_action(dtp, sdp);
478
479 if (argc == 1) {
480 dt_action_difconst(ap, 0, DTRACEACT_LIBACT);
481 } else {
482 assert(trunc != NULL);
483 dt_cg(yypcb, trunc);
484 ap->dtad_difo = dt_as(yypcb);
485 ap->dtad_kind = DTRACEACT_LIBACT;
486 }
487
488 ap->dtad_arg = DT_ACT_TRUNC;
489 }
490
491 static void
492 dt_action_printa(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
493 {
494 dt_ident_t *aid, *fid;
495 dtrace_actdesc_t *ap;
496 const char *format;
497 dt_node_t *anp, *proto = NULL;
498
499 char n[DT_TYPE_NAMELEN];
500 int argc = 0, argr = 0;
501
502 for (anp = dnp->dn_args; anp != NULL; anp = anp->dn_list)
503 argc++; /* count up arguments for error messages below */
504
505 switch (dnp->dn_args->dn_kind) {
506 case DT_NODE_STRING:
507 format = dnp->dn_args->dn_string;
508 anp = dnp->dn_args->dn_list;
509 argr = 2;
510 break;
511 case DT_NODE_AGG:
512 format = NULL;
513 anp = dnp->dn_args;
514 argr = 1;
515 break;
516 default:
517 format = NULL;
518 anp = dnp->dn_args;
519 argr = 1;
520 }
521
522 if (argc < argr) {
523 dnerror(dnp, D_PRINTA_PROTO,
524 "%s( ) prototype mismatch: %d args passed, %d expected\n",
525 dnp->dn_ident->di_name, argc, argr);
526 }
527
528 assert(anp != NULL);
529
530 while (anp != NULL) {
531 if (anp->dn_kind != DT_NODE_AGG) {
532 dnerror(dnp, D_PRINTA_AGGARG,
533 "%s( ) argument #%d is incompatible with "
534 "prototype:\n\tprototype: aggregation\n"
535 "\t argument: %s\n", dnp->dn_ident->di_name, argr,
536 dt_node_type_name(anp, n, sizeof (n)));
537 }
538
539 aid = anp->dn_ident;
540 fid = aid->di_iarg;
541
542 if (aid->di_gen == dtp->dt_gen &&
543 !(aid->di_flags & DT_IDFLG_MOD)) {
544 dnerror(dnp, D_PRINTA_AGGBAD,
545 "undefined aggregation: @%s\n", aid->di_name);
546 }
547
548 /*
549 * If we have multiple aggregations, we must be sure that
550 * their key signatures match.
551 */
552 if (proto != NULL) {
553 dt_printa_validate(proto, anp);
554 } else {
555 proto = anp;
556 }
557
558 if (format != NULL) {
559 yylineno = dnp->dn_line;
560
561 sdp->dtsd_fmtdata =
562 dt_printf_create(yypcb->pcb_hdl, format);
563 dt_printf_validate(sdp->dtsd_fmtdata,
564 DT_PRINTF_AGGREGATION, dnp->dn_ident, 1,
565 fid->di_id, ((dt_idsig_t *)aid->di_data)->dis_args);
566 format = NULL;
567 }
568
569 ap = dt_stmt_action(dtp, sdp);
570 dt_action_difconst(ap, anp->dn_ident->di_id, DTRACEACT_PRINTA);
571
572 anp = anp->dn_list;
573 argr++;
574 }
575 }
576
577 static void
578 dt_action_printflike(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp,
579 dtrace_actkind_t kind)
580 {
581 dt_node_t *anp, *arg1;
582 dtrace_actdesc_t *ap = NULL;
583 char n[DT_TYPE_NAMELEN], *str;
584
585 assert(DTRACEACT_ISPRINTFLIKE(kind));
586
587 if (dnp->dn_args->dn_kind != DT_NODE_STRING) {
588 dnerror(dnp, D_PRINTF_ARG_FMT,
589 "%s( ) argument #1 is incompatible with prototype:\n"
590 "\tprototype: string constant\n\t argument: %s\n",
591 dnp->dn_ident->di_name,
592 dt_node_type_name(dnp->dn_args, n, sizeof (n)));
593 }
594
595 arg1 = dnp->dn_args->dn_list;
596 yylineno = dnp->dn_line;
597 str = dnp->dn_args->dn_string;
598
599
600 /*
601 * If this is an freopen(), we use an empty string to denote that
602 * stdout should be restored. For other printf()-like actions, an
603 * empty format string is illegal: an empty format string would
604 * result in malformed DOF, and the compiler thus flags an empty
605 * format string as a compile-time error. To avoid propagating the
606 * freopen() special case throughout the system, we simply transpose
607 * an empty string into a sentinel string (DT_FREOPEN_RESTORE) that
608 * denotes that stdout should be restored.
609 */
610 if (kind == DTRACEACT_FREOPEN) {
611 if (strcmp(str, DT_FREOPEN_RESTORE) == 0) {
612 /*
613 * Our sentinel is always an invalid argument to
614 * freopen(), but if it's been manually specified, we
615 * must fail now instead of when the freopen() is
616 * actually evaluated.
617 */
618 dnerror(dnp, D_FREOPEN_INVALID,
619 "%s( ) argument #1 cannot be \"%s\"\n",
620 dnp->dn_ident->di_name, DT_FREOPEN_RESTORE);
621 }
622
623 if (str[0] == '\0')
624 str = DT_FREOPEN_RESTORE;
625 }
626
627 sdp->dtsd_fmtdata = dt_printf_create(dtp, str);
628
629 dt_printf_validate(sdp->dtsd_fmtdata, DT_PRINTF_EXACTLEN,
630 dnp->dn_ident, 1, DTRACEACT_AGGREGATION, arg1);
631
632 if (arg1 == NULL) {
633 dif_instr_t *dbuf;
634 dtrace_difo_t *dp;
635
636 if ((dbuf = dt_alloc(dtp, sizeof (dif_instr_t))) == NULL ||
637 (dp = dt_zalloc(dtp, sizeof (dtrace_difo_t))) == NULL) {
638 dt_free(dtp, dbuf);
639 longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
640 }
641
642 dbuf[0] = DIF_INSTR_RET(DIF_REG_R0); /* ret %r0 */
643
644 dp->dtdo_buf = dbuf;
645 dp->dtdo_len = 1;
646 dp->dtdo_rtype = dt_int_rtype;
647
648 ap = dt_stmt_action(dtp, sdp);
649 ap->dtad_difo = dp;
650 ap->dtad_kind = kind;
651 return;
652 }
653
654 for (anp = arg1; anp != NULL; anp = anp->dn_list) {
655 ap = dt_stmt_action(dtp, sdp);
656 dt_cg(yypcb, anp);
657 ap->dtad_difo = dt_as(yypcb);
658 ap->dtad_kind = kind;
659 }
660 }
661
662 static void
663 dt_action_trace(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
664 {
665 int ctflib;
666
667 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
668 boolean_t istrace = (dnp->dn_ident->di_id == DT_ACT_TRACE);
669 const char *act = istrace ? "trace" : "print";
670
671 if (dt_node_is_void(dnp->dn_args)) {
672 dnerror(dnp->dn_args, istrace ? D_TRACE_VOID : D_PRINT_VOID,
673 "%s( ) may not be applied to a void expression\n", act);
674 }
675
676 if (dt_node_resolve(dnp->dn_args, DT_IDENT_XLPTR) != NULL) {
677 dnerror(dnp->dn_args, istrace ? D_TRACE_DYN : D_PRINT_DYN,
678 "%s( ) may not be applied to a translated pointer\n", act);
679 }
680
681 if (dnp->dn_args->dn_kind == DT_NODE_AGG) {
682 dnerror(dnp->dn_args, istrace ? D_TRACE_AGG : D_PRINT_AGG,
683 "%s( ) may not be applied to an aggregation%s\n", act,
684 istrace ? "" : " -- did you mean printa()?");
685 }
686
687 dt_cg(yypcb, dnp->dn_args);
688
689 /*
690 * The print() action behaves identically to trace(), except that it
691 * stores the CTF type of the argument (if present) within the DOF for
692 * the DIFEXPR action. To do this, we set the 'dtsd_strdata' to point
693 * to the fully-qualified CTF type ID for the result of the DIF
694 * action. We use the ID instead of the name to handles complex types
695 * like arrays and function pointers that can't be resolved by
696 * ctf_type_lookup(). This is later processed by dtrace_dof_create()
697 * and turned into a reference into the string table so that we can
698 * get the type information when we process the data after the fact. In
699 * the case where we are referring to userland CTF data, we also need to
700 * to identify which ctf container in question we care about and encode
701 * that within the name.
702 */
703 if (dnp->dn_ident->di_id == DT_ACT_PRINT) {
704 dt_node_t *dret;
705 size_t n;
706 dt_module_t *dmp;
707
708 dret = yypcb->pcb_dret;
709 dmp = dt_module_lookup_by_ctf(dtp, dret->dn_ctfp);
710
711 if (dmp->dm_pid != 0) {
712 ctflib = dt_module_getlibid(dtp, dmp, dret->dn_ctfp);
713 assert(ctflib >= 0);
714 n = snprintf(NULL, 0, "%s`%d`%d", dmp->dm_name,
715 ctflib, dret->dn_type) + 1;
716 } else {
717 n = snprintf(NULL, 0, "%s`%d", dmp->dm_name,
718 dret->dn_type) + 1;
719 }
720 sdp->dtsd_strdata = dt_alloc(dtp, n);
721 if (sdp->dtsd_strdata == NULL)
722 longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
723 if (dmp->dm_pid != 0) {
724 (void) snprintf(sdp->dtsd_strdata, n, "%s`%d`%d",
725 dmp->dm_name, ctflib, dret->dn_type);
726 } else {
727 (void) snprintf(sdp->dtsd_strdata, n, "%s`%d",
728 dmp->dm_name, dret->dn_type);
729 }
730 }
731
732 ap->dtad_difo = dt_as(yypcb);
733 ap->dtad_kind = DTRACEACT_DIFEXPR;
734 }
735
736 static void
737 dt_action_tracemem(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
738 {
739 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
740
741 dt_node_t *addr = dnp->dn_args;
742 dt_node_t *max = dnp->dn_args->dn_list;
743 dt_node_t *size;
744
745 char n[DT_TYPE_NAMELEN];
746
747 if (dt_node_is_integer(addr) == 0 && dt_node_is_pointer(addr) == 0) {
748 dnerror(addr, D_TRACEMEM_ADDR,
749 "tracemem( ) argument #1 is incompatible with "
750 "prototype:\n\tprototype: pointer or integer\n"
751 "\t argument: %s\n",
752 dt_node_type_name(addr, n, sizeof (n)));
753 }
754
755 if (dt_node_is_posconst(max) == 0) {
756 dnerror(max, D_TRACEMEM_SIZE, "tracemem( ) argument #2 must "
757 "be a non-zero positive integral constant expression\n");
758 }
759
760 if ((size = max->dn_list) != NULL) {
761 if (size->dn_list != NULL) {
762 dnerror(size, D_TRACEMEM_ARGS, "tracemem ( ) prototype "
763 "mismatch: expected at most 3 args\n");
764 }
765
766 if (!dt_node_is_scalar(size)) {
767 dnerror(size, D_TRACEMEM_DYNSIZE, "tracemem ( ) "
768 "dynamic size (argument #3) must be of "
769 "scalar type\n");
770 }
771
772 dt_cg(yypcb, size);
773 ap->dtad_difo = dt_as(yypcb);
774 ap->dtad_difo->dtdo_rtype = dt_int_rtype;
775 ap->dtad_kind = DTRACEACT_TRACEMEM_DYNSIZE;
776
777 ap = dt_stmt_action(dtp, sdp);
778 }
779
780 dt_cg(yypcb, addr);
781 ap->dtad_difo = dt_as(yypcb);
782 ap->dtad_kind = DTRACEACT_TRACEMEM;
783
784 ap->dtad_difo->dtdo_rtype.dtdt_flags |= DIF_TF_BYREF;
785 ap->dtad_difo->dtdo_rtype.dtdt_size = max->dn_value;
786 }
787
788 static void
789 dt_action_stack_args(dtrace_hdl_t *dtp, dtrace_actdesc_t *ap, dt_node_t *arg0)
790 {
791 ap->dtad_kind = DTRACEACT_STACK;
792
793 if (dtp->dt_options[DTRACEOPT_STACKFRAMES] != DTRACEOPT_UNSET) {
794 ap->dtad_arg = dtp->dt_options[DTRACEOPT_STACKFRAMES];
795 } else {
796 ap->dtad_arg = 0;
797 }
798
799 if (arg0 != NULL) {
800 if (arg0->dn_list != NULL) {
801 dnerror(arg0, D_STACK_PROTO, "stack( ) prototype "
802 "mismatch: too many arguments\n");
803 }
804
805 if (dt_node_is_posconst(arg0) == 0) {
806 dnerror(arg0, D_STACK_SIZE, "stack( ) size must be a "
807 "non-zero positive integral constant expression\n");
808 }
809
810 ap->dtad_arg = arg0->dn_value;
811 }
812 }
813
814 static void
815 dt_action_stack(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
816 {
817 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
818 dt_action_stack_args(dtp, ap, dnp->dn_args);
819 }
820
821 static void
822 dt_action_ustack_args(dtrace_hdl_t *dtp, dtrace_actdesc_t *ap, dt_node_t *dnp)
823 {
824 uint32_t nframes = 0;
825 uint32_t strsize = 0; /* default string table size */
826 dt_node_t *arg0 = dnp->dn_args;
827 dt_node_t *arg1 = arg0 != NULL ? arg0->dn_list : NULL;
828
829 assert(dnp->dn_ident->di_id == DT_ACT_JSTACK ||
830 dnp->dn_ident->di_id == DT_ACT_USTACK);
831
832 if (dnp->dn_ident->di_id == DT_ACT_JSTACK) {
833 if (dtp->dt_options[DTRACEOPT_JSTACKFRAMES] != DTRACEOPT_UNSET)
834 nframes = dtp->dt_options[DTRACEOPT_JSTACKFRAMES];
835
836 if (dtp->dt_options[DTRACEOPT_JSTACKSTRSIZE] != DTRACEOPT_UNSET)
837 strsize = dtp->dt_options[DTRACEOPT_JSTACKSTRSIZE];
838
839 ap->dtad_kind = DTRACEACT_JSTACK;
840 } else {
841 assert(dnp->dn_ident->di_id == DT_ACT_USTACK);
842
843 if (dtp->dt_options[DTRACEOPT_USTACKFRAMES] != DTRACEOPT_UNSET)
844 nframes = dtp->dt_options[DTRACEOPT_USTACKFRAMES];
845
846 ap->dtad_kind = DTRACEACT_USTACK;
847 }
848
849 if (arg0 != NULL) {
850 if (!dt_node_is_posconst(arg0)) {
851 dnerror(arg0, D_USTACK_FRAMES, "ustack( ) argument #1 "
852 "must be a non-zero positive integer constant\n");
853 }
854 nframes = (uint32_t)arg0->dn_value;
855 }
856
857 if (arg1 != NULL) {
858 if (arg1->dn_kind != DT_NODE_INT ||
859 ((arg1->dn_flags & DT_NF_SIGNED) &&
860 (int64_t)arg1->dn_value < 0)) {
861 dnerror(arg1, D_USTACK_STRSIZE, "ustack( ) argument #2 "
862 "must be a positive integer constant\n");
863 }
864
865 if (arg1->dn_list != NULL) {
866 dnerror(arg1, D_USTACK_PROTO, "ustack( ) prototype "
867 "mismatch: too many arguments\n");
868 }
869
870 strsize = (uint32_t)arg1->dn_value;
871 }
872
873 ap->dtad_arg = DTRACE_USTACK_ARG(nframes, strsize);
874 }
875
876 static void
877 dt_action_ustack(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
878 {
879 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
880 dt_action_ustack_args(dtp, ap, dnp);
881 }
882
883 static void
884 dt_action_setopt(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
885 {
886 dtrace_actdesc_t *ap;
887 dt_node_t *arg0, *arg1;
888
889 /*
890 * The prototype guarantees that we are called with either one or
891 * two arguments, and that any arguments that are present are strings.
892 */
893 arg0 = dnp->dn_args;
894 arg1 = arg0->dn_list;
895
896 ap = dt_stmt_action(dtp, sdp);
897 dt_cg(yypcb, arg0);
898 ap->dtad_difo = dt_as(yypcb);
899 ap->dtad_kind = DTRACEACT_LIBACT;
900 ap->dtad_arg = DT_ACT_SETOPT;
901
902 ap = dt_stmt_action(dtp, sdp);
903
904 if (arg1 == NULL) {
905 dt_action_difconst(ap, 0, DTRACEACT_LIBACT);
906 } else {
907 dt_cg(yypcb, arg1);
908 ap->dtad_difo = dt_as(yypcb);
909 ap->dtad_kind = DTRACEACT_LIBACT;
910 }
911
912 ap->dtad_arg = DT_ACT_SETOPT;
913 }
914
915 /*ARGSUSED*/
916 static void
917 dt_action_symmod_args(dtrace_hdl_t *dtp, dtrace_actdesc_t *ap,
918 dt_node_t *dnp, dtrace_actkind_t kind)
919 {
920 assert(kind == DTRACEACT_SYM || kind == DTRACEACT_MOD ||
921 kind == DTRACEACT_USYM || kind == DTRACEACT_UMOD ||
922 kind == DTRACEACT_UADDR);
923
924 dt_cg(yypcb, dnp);
925 ap->dtad_difo = dt_as(yypcb);
926 ap->dtad_kind = kind;
927 ap->dtad_difo->dtdo_rtype.dtdt_size = sizeof (uint64_t);
928 }
929
930 static void
931 dt_action_symmod(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp,
932 dtrace_actkind_t kind)
933 {
934 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
935 dt_action_symmod_args(dtp, ap, dnp->dn_args, kind);
936 }
937
938 /*ARGSUSED*/
939 static void
940 dt_action_ftruncate(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
941 {
942 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
943
944 /*
945 * Library actions need a DIFO that serves as an argument. As
946 * ftruncate() doesn't take an argument, we generate the constant 0
947 * in a DIFO; this constant will be ignored when the ftruncate() is
948 * processed.
949 */
950 dt_action_difconst(ap, 0, DTRACEACT_LIBACT);
951 ap->dtad_arg = DT_ACT_FTRUNCATE;
952 }
953
954 /*ARGSUSED*/
955 static void
956 dt_action_stop(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
957 {
958 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
959
960 ap->dtad_kind = DTRACEACT_STOP;
961 ap->dtad_arg = 0;
962 }
963
964 /*ARGSUSED*/
965 static void
966 dt_action_breakpoint(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
967 {
968 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
969
970 ap->dtad_kind = DTRACEACT_BREAKPOINT;
971 ap->dtad_arg = 0;
972 }
973
974 /*ARGSUSED*/
975 static void
976 dt_action_panic(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
977 {
978 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
979
980 ap->dtad_kind = DTRACEACT_PANIC;
981 ap->dtad_arg = 0;
982 }
983
984 static void
985 dt_action_chill(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
986 {
987 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
988
989 dt_cg(yypcb, dnp->dn_args);
990 ap->dtad_difo = dt_as(yypcb);
991 ap->dtad_kind = DTRACEACT_CHILL;
992 }
993
994 static void
995 dt_action_raise(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
996 {
997 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
998
999 dt_cg(yypcb, dnp->dn_args);
1000 ap->dtad_difo = dt_as(yypcb);
1001 ap->dtad_kind = DTRACEACT_RAISE;
1002 }
1003
1004 static void
1005 dt_action_exit(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
1006 {
1007 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
1008
1009 dt_cg(yypcb, dnp->dn_args);
1010 ap->dtad_difo = dt_as(yypcb);
1011 ap->dtad_kind = DTRACEACT_EXIT;
1012 ap->dtad_difo->dtdo_rtype.dtdt_size = sizeof (int);
1013 }
1014
1015 static void
1016 dt_action_speculate(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
1017 {
1018 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
1019
1020 dt_cg(yypcb, dnp->dn_args);
1021 ap->dtad_difo = dt_as(yypcb);
1022 ap->dtad_kind = DTRACEACT_SPECULATE;
1023 }
1024
1025 static void
1026 dt_action_commit(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
1027 {
1028 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
1029
1030 dt_cg(yypcb, dnp->dn_args);
1031 ap->dtad_difo = dt_as(yypcb);
1032 ap->dtad_kind = DTRACEACT_COMMIT;
1033 }
1034
1035 static void
1036 dt_action_discard(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
1037 {
1038 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
1039
1040 dt_cg(yypcb, dnp->dn_args);
1041 ap->dtad_difo = dt_as(yypcb);
1042 ap->dtad_kind = DTRACEACT_DISCARD;
1043 }
1044
1045 static void
1046 dt_compile_fun(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
1047 {
1048 switch (dnp->dn_expr->dn_ident->di_id) {
1049 case DT_ACT_BREAKPOINT:
1050 dt_action_breakpoint(dtp, dnp->dn_expr, sdp);
1051 break;
1052 case DT_ACT_CHILL:
1053 dt_action_chill(dtp, dnp->dn_expr, sdp);
1054 break;
1055 case DT_ACT_CLEAR:
1056 dt_action_clear(dtp, dnp->dn_expr, sdp);
1057 break;
1058 case DT_ACT_COMMIT:
1059 dt_action_commit(dtp, dnp->dn_expr, sdp);
1060 break;
1061 case DT_ACT_DENORMALIZE:
1062 dt_action_normalize(dtp, dnp->dn_expr, sdp);
1063 break;
1064 case DT_ACT_DISCARD:
1065 dt_action_discard(dtp, dnp->dn_expr, sdp);
1066 break;
1067 case DT_ACT_EXIT:
1068 dt_action_exit(dtp, dnp->dn_expr, sdp);
1069 break;
1070 case DT_ACT_FREOPEN:
1071 dt_action_printflike(dtp, dnp->dn_expr, sdp, DTRACEACT_FREOPEN);
1072 break;
1073 case DT_ACT_FTRUNCATE:
1074 dt_action_ftruncate(dtp, dnp->dn_expr, sdp);
1075 break;
1076 case DT_ACT_MOD:
1077 dt_action_symmod(dtp, dnp->dn_expr, sdp, DTRACEACT_MOD);
1078 break;
1079 case DT_ACT_NORMALIZE:
1080 dt_action_normalize(dtp, dnp->dn_expr, sdp);
1081 break;
1082 case DT_ACT_PANIC:
1083 dt_action_panic(dtp, dnp->dn_expr, sdp);
1084 break;
1085 case DT_ACT_PRINT:
1086 dt_action_trace(dtp, dnp->dn_expr, sdp);
1087 break;
1088 case DT_ACT_PRINTA:
1089 dt_action_printa(dtp, dnp->dn_expr, sdp);
1090 break;
1091 case DT_ACT_PRINTF:
1092 dt_action_printflike(dtp, dnp->dn_expr, sdp, DTRACEACT_PRINTF);
1093 break;
1094 case DT_ACT_RAISE:
1095 dt_action_raise(dtp, dnp->dn_expr, sdp);
1096 break;
1097 case DT_ACT_SETOPT:
1098 dt_action_setopt(dtp, dnp->dn_expr, sdp);
1099 break;
1100 case DT_ACT_SPECULATE:
1101 dt_action_speculate(dtp, dnp->dn_expr, sdp);
1102 break;
1103 case DT_ACT_STACK:
1104 dt_action_stack(dtp, dnp->dn_expr, sdp);
1105 break;
1106 case DT_ACT_STOP:
1107 dt_action_stop(dtp, dnp->dn_expr, sdp);
1108 break;
1109 case DT_ACT_SYM:
1110 dt_action_symmod(dtp, dnp->dn_expr, sdp, DTRACEACT_SYM);
1111 break;
1112 case DT_ACT_SYSTEM:
1113 dt_action_printflike(dtp, dnp->dn_expr, sdp, DTRACEACT_SYSTEM);
1114 break;
1115 case DT_ACT_TRACE:
1116 dt_action_trace(dtp, dnp->dn_expr, sdp);
1117 break;
1118 case DT_ACT_TRACEMEM:
1119 dt_action_tracemem(dtp, dnp->dn_expr, sdp);
1120 break;
1121 case DT_ACT_TRUNC:
1122 dt_action_trunc(dtp, dnp->dn_expr, sdp);
1123 break;
1124 case DT_ACT_UADDR:
1125 dt_action_symmod(dtp, dnp->dn_expr, sdp, DTRACEACT_UADDR);
1126 break;
1127 case DT_ACT_UMOD:
1128 dt_action_symmod(dtp, dnp->dn_expr, sdp, DTRACEACT_UMOD);
1129 break;
1130 case DT_ACT_USYM:
1131 dt_action_symmod(dtp, dnp->dn_expr, sdp, DTRACEACT_USYM);
1132 break;
1133 case DT_ACT_USTACK:
1134 case DT_ACT_JSTACK:
1135 dt_action_ustack(dtp, dnp->dn_expr, sdp);
1136 break;
1137 default:
1138 dnerror(dnp->dn_expr, D_UNKNOWN, "tracing function %s( ) is "
1139 "not yet supported\n", dnp->dn_expr->dn_ident->di_name);
1140 }
1141 }
1142
1143 static void
1144 dt_compile_exp(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
1145 {
1146 dtrace_actdesc_t *ap = dt_stmt_action(dtp, sdp);
1147
1148 dt_cg(yypcb, dnp->dn_expr);
1149 ap->dtad_difo = dt_as(yypcb);
1150 ap->dtad_difo->dtdo_rtype = dt_void_rtype;
1151 ap->dtad_kind = DTRACEACT_DIFEXPR;
1152 }
1153
1154 static void
1155 dt_compile_agg(dtrace_hdl_t *dtp, dt_node_t *dnp, dtrace_stmtdesc_t *sdp)
1156 {
1157 dt_ident_t *aid, *fid;
1158 dt_node_t *anp, *incr = NULL;
1159 dtrace_actdesc_t *ap;
1160 uint_t n = 1, argmax;
1161 uint64_t arg = 0;
1162
1163 /*
1164 * If the aggregation has no aggregating function applied to it, then
1165 * this statement has no effect. Flag this as a programming error.
1166 */
1167 if (dnp->dn_aggfun == NULL) {
1168 dnerror(dnp, D_AGG_NULL, "expression has null effect: @%s\n",
1169 dnp->dn_ident->di_name);
1170 }
1171
1172 aid = dnp->dn_ident;
1173 fid = dnp->dn_aggfun->dn_ident;
1174
1175 if (dnp->dn_aggfun->dn_args != NULL &&
1176 dt_node_is_scalar(dnp->dn_aggfun->dn_args) == 0) {
1177 dnerror(dnp->dn_aggfun, D_AGG_SCALAR, "%s( ) argument #1 must "
1178 "be of scalar type\n", fid->di_name);
1179 }
1180
1181 /*
1182 * The ID of the aggregation itself is implicitly recorded as the first
1183 * member of each aggregation tuple so we can distinguish them later.
1184 */
1185 ap = dt_stmt_action(dtp, sdp);
1186 dt_action_difconst(ap, aid->di_id, DTRACEACT_DIFEXPR);
1187
1188 for (anp = dnp->dn_aggtup; anp != NULL; anp = anp->dn_list) {
1189 ap = dt_stmt_action(dtp, sdp);
1190 n++;
1191
1192 if (anp->dn_kind == DT_NODE_FUNC) {
1193 if (anp->dn_ident->di_id == DT_ACT_STACK) {
1194 dt_action_stack_args(dtp, ap, anp->dn_args);
1195 continue;
1196 }
1197
1198 if (anp->dn_ident->di_id == DT_ACT_USTACK ||
1199 anp->dn_ident->di_id == DT_ACT_JSTACK) {
1200 dt_action_ustack_args(dtp, ap, anp);
1201 continue;
1202 }
1203
1204 switch (anp->dn_ident->di_id) {
1205 case DT_ACT_UADDR:
1206 dt_action_symmod_args(dtp, ap,
1207 anp->dn_args, DTRACEACT_UADDR);
1208 continue;
1209
1210 case DT_ACT_USYM:
1211 dt_action_symmod_args(dtp, ap,
1212 anp->dn_args, DTRACEACT_USYM);
1213 continue;
1214
1215 case DT_ACT_UMOD:
1216 dt_action_symmod_args(dtp, ap,
1217 anp->dn_args, DTRACEACT_UMOD);
1218 continue;
1219
1220 case DT_ACT_SYM:
1221 dt_action_symmod_args(dtp, ap,
1222 anp->dn_args, DTRACEACT_SYM);
1223 continue;
1224
1225 case DT_ACT_MOD:
1226 dt_action_symmod_args(dtp, ap,
1227 anp->dn_args, DTRACEACT_MOD);
1228 continue;
1229
1230 default:
1231 break;
1232 }
1233 }
1234
1235 dt_cg(yypcb, anp);
1236 ap->dtad_difo = dt_as(yypcb);
1237 ap->dtad_kind = DTRACEACT_DIFEXPR;
1238 }
1239
1240 if (fid->di_id == DTRACEAGG_LQUANTIZE) {
1241 /*
1242 * For linear quantization, we have between two and four
1243 * arguments in addition to the expression:
1244 *
1245 * arg1 => Base value
1246 * arg2 => Limit value
1247 * arg3 => Quantization level step size (defaults to 1)
1248 * arg4 => Quantization increment value (defaults to 1)
1249 */
1250 dt_node_t *arg1 = dnp->dn_aggfun->dn_args->dn_list;
1251 dt_node_t *arg2 = arg1->dn_list;
1252 dt_node_t *arg3 = arg2->dn_list;
1253 dt_idsig_t *isp;
1254 uint64_t nlevels, step = 1, oarg;
1255 int64_t baseval, limitval;
1256
1257 if (arg1->dn_kind != DT_NODE_INT) {
1258 dnerror(arg1, D_LQUANT_BASETYPE, "lquantize( ) "
1259 "argument #1 must be an integer constant\n");
1260 }
1261
1262 baseval = (int64_t)arg1->dn_value;
1263
1264 if (baseval < INT32_MIN || baseval > INT32_MAX) {
1265 dnerror(arg1, D_LQUANT_BASEVAL, "lquantize( ) "
1266 "argument #1 must be a 32-bit quantity\n");
1267 }
1268
1269 if (arg2->dn_kind != DT_NODE_INT) {
1270 dnerror(arg2, D_LQUANT_LIMTYPE, "lquantize( ) "
1271 "argument #2 must be an integer constant\n");
1272 }
1273
1274 limitval = (int64_t)arg2->dn_value;
1275
1276 if (limitval < INT32_MIN || limitval > INT32_MAX) {
1277 dnerror(arg2, D_LQUANT_LIMVAL, "lquantize( ) "
1278 "argument #2 must be a 32-bit quantity\n");
1279 }
1280
1281 if (limitval < baseval) {
1282 dnerror(dnp, D_LQUANT_MISMATCH,
1283 "lquantize( ) base (argument #1) must be less "
1284 "than limit (argument #2)\n");
1285 }
1286
1287 if (arg3 != NULL) {
1288 if (!dt_node_is_posconst(arg3)) {
1289 dnerror(arg3, D_LQUANT_STEPTYPE, "lquantize( ) "
1290 "argument #3 must be a non-zero positive "
1291 "integer constant\n");
1292 }
1293
1294 if ((step = arg3->dn_value) > UINT16_MAX) {
1295 dnerror(arg3, D_LQUANT_STEPVAL, "lquantize( ) "
1296 "argument #3 must be a 16-bit quantity\n");
1297 }
1298 }
1299
1300 nlevels = (limitval - baseval) / step;
1301
1302 if (nlevels == 0) {
1303 dnerror(dnp, D_LQUANT_STEPLARGE,
1304 "lquantize( ) step (argument #3) too large: must "
1305 "have at least one quantization level\n");
1306 }
1307
1308 if (nlevels > UINT16_MAX) {
1309 dnerror(dnp, D_LQUANT_STEPSMALL, "lquantize( ) step "
1310 "(argument #3) too small: number of quantization "
1311 "levels must be a 16-bit quantity\n");
1312 }
1313
1314 arg = (step << DTRACE_LQUANTIZE_STEPSHIFT) |
1315 (nlevels << DTRACE_LQUANTIZE_LEVELSHIFT) |
1316 ((baseval << DTRACE_LQUANTIZE_BASESHIFT) &
1317 DTRACE_LQUANTIZE_BASEMASK);
1318
1319 assert(arg != 0);
1320
1321 isp = (dt_idsig_t *)aid->di_data;
1322
1323 if (isp->dis_auxinfo == 0) {
1324 /*
1325 * This is the first time we've seen an lquantize()
1326 * for this aggregation; we'll store our argument
1327 * as the auxiliary signature information.
1328 */
1329 isp->dis_auxinfo = arg;
1330 } else if ((oarg = isp->dis_auxinfo) != arg) {
1331 /*
1332 * If we have seen this lquantize() before and the
1333 * argument doesn't match the original argument, pick
1334 * the original argument apart to concisely report the
1335 * mismatch.
1336 */
1337 int obaseval = DTRACE_LQUANTIZE_BASE(oarg);
1338 int onlevels = DTRACE_LQUANTIZE_LEVELS(oarg);
1339 int ostep = DTRACE_LQUANTIZE_STEP(oarg);
1340
1341 if (obaseval != baseval) {
1342 dnerror(dnp, D_LQUANT_MATCHBASE, "lquantize( ) "
1343 "base (argument #1) doesn't match previous "
1344 "declaration: expected %d, found %d\n",
1345 obaseval, (int)baseval);
1346 }
1347
1348 if (onlevels * ostep != nlevels * step) {
1349 dnerror(dnp, D_LQUANT_MATCHLIM, "lquantize( ) "
1350 "limit (argument #2) doesn't match previous"
1351 " declaration: expected %d, found %d\n",
1352 obaseval + onlevels * ostep,
1353 (int)baseval + (int)nlevels * (int)step);
1354 }
1355
1356 if (ostep != step) {
1357 dnerror(dnp, D_LQUANT_MATCHSTEP, "lquantize( ) "
1358 "step (argument #3) doesn't match previous "
1359 "declaration: expected %d, found %d\n",
1360 ostep, (int)step);
1361 }
1362
1363 /*
1364 * We shouldn't be able to get here -- one of the
1365 * parameters must be mismatched if the arguments
1366 * didn't match.
1367 */
1368 assert(0);
1369 }
1370
1371 incr = arg3 != NULL ? arg3->dn_list : NULL;
1372 argmax = 5;
1373 }
1374
1375 if (fid->di_id == DTRACEAGG_LLQUANTIZE) {
1376 /*
1377 * For log/linear quantizations, we have between one and five
1378 * arguments in addition to the expression:
1379 *
1380 * arg1 => Factor
1381 * arg2 => Low magnitude
1382 * arg3 => High magnitude
1383 * arg4 => Number of steps per magnitude
1384 * arg5 => Quantization increment value (defaults to 1)
1385 */
1386 dt_node_t *llarg = dnp->dn_aggfun->dn_args->dn_list;
1387 uint64_t oarg, order, v;
1388 dt_idsig_t *isp;
1389 int i;
1390
1391 struct {
1392 char *str; /* string identifier */
1393 int badtype; /* error on bad type */
1394 int badval; /* error on bad value */
1395 int mismatch; /* error on bad match */
1396 int shift; /* shift value */
1397 uint16_t value; /* value itself */
1398 } args[] = {
1399 { "factor", D_LLQUANT_FACTORTYPE,
1400 D_LLQUANT_FACTORVAL, D_LLQUANT_FACTORMATCH,
1401 DTRACE_LLQUANTIZE_FACTORSHIFT },
1402 { "low magnitude", D_LLQUANT_LOWTYPE,
1403 D_LLQUANT_LOWVAL, D_LLQUANT_LOWMATCH,
1404 DTRACE_LLQUANTIZE_LOWSHIFT },
1405 { "high magnitude", D_LLQUANT_HIGHTYPE,
1406 D_LLQUANT_HIGHVAL, D_LLQUANT_HIGHMATCH,
1407 DTRACE_LLQUANTIZE_HIGHSHIFT },
1408 { "linear steps per magnitude", D_LLQUANT_NSTEPTYPE,
1409 D_LLQUANT_NSTEPVAL, D_LLQUANT_NSTEPMATCH,
1410 DTRACE_LLQUANTIZE_NSTEPSHIFT },
1411 { NULL }
1412 };
1413
1414 assert(arg == 0);
1415
1416 for (i = 0; args[i].str != NULL; i++) {
1417 if (llarg->dn_kind != DT_NODE_INT) {
1418 dnerror(llarg, args[i].badtype, "llquantize( ) "
1419 "argument #%d (%s) must be an "
1420 "integer constant\n", i + 1, args[i].str);
1421 }
1422
1423 if ((uint64_t)llarg->dn_value > UINT16_MAX) {
1424 dnerror(llarg, args[i].badval, "llquantize( ) "
1425 "argument #%d (%s) must be an unsigned "
1426 "16-bit quantity\n", i + 1, args[i].str);
1427 }
1428
1429 args[i].value = (uint16_t)llarg->dn_value;
1430
1431 assert(!(arg & (UINT16_MAX << args[i].shift)));
1432 arg |= ((uint64_t)args[i].value << args[i].shift);
1433 llarg = llarg->dn_list;
1434 }
1435
1436 assert(arg != 0);
1437
1438 if (args[0].value < 2) {
1439 dnerror(dnp, D_LLQUANT_FACTORSMALL, "llquantize( ) "
1440 "factor (argument #1) must be two or more\n");
1441 }
1442
1443 if (args[1].value >= args[2].value) {
1444 dnerror(dnp, D_LLQUANT_MAGRANGE, "llquantize( ) "
1445 "high magnitude (argument #3) must be greater "
1446 "than low magnitude (argument #2)\n");
1447 }
1448
1449 if (args[3].value < args[0].value) {
1450 dnerror(dnp, D_LLQUANT_FACTORNSTEPS, "llquantize( ) "
1451 "factor (argument #1) must be less than or "
1452 "equal to the number of linear steps per "
1453 "magnitude (argument #4)\n");
1454 }
1455
1456 for (v = args[0].value; v < args[3].value; v *= args[0].value)
1457 continue;
1458
1459 if ((args[3].value % args[0].value) || (v % args[3].value)) {
1460 dnerror(dnp, D_LLQUANT_FACTOREVEN, "llquantize( ) "
1461 "factor (argument #1) must evenly divide the "
1462 "number of steps per magnitude (argument #4), "
1463 "and the number of steps per magnitude must evenly "
1464 "divide a power of the factor\n");
1465 }
1466
1467 for (i = 0, order = 1; i < args[2].value; i++) {
1468 if (order * args[0].value > order) {
1469 order *= args[0].value;
1470 continue;
1471 }
1472
1473 dnerror(dnp, D_LLQUANT_MAGTOOBIG, "llquantize( ) "
1474 "factor (%d) raised to power of high magnitude "
1475 "(%d) overflows 64-bits\n", args[0].value,
1476 args[2].value);
1477 }
1478
1479 isp = (dt_idsig_t *)aid->di_data;
1480
1481 if (isp->dis_auxinfo == 0) {
1482 /*
1483 * This is the first time we've seen an llquantize()
1484 * for this aggregation; we'll store our argument
1485 * as the auxiliary signature information.
1486 */
1487 isp->dis_auxinfo = arg;
1488 } else if ((oarg = isp->dis_auxinfo) != arg) {
1489 /*
1490 * If we have seen this llquantize() before and the
1491 * argument doesn't match the original argument, pick
1492 * the original argument apart to concisely report the
1493 * mismatch.
1494 */
1495 int expected = 0, found = 0;
1496
1497 for (i = 0; expected == found; i++) {
1498 assert(args[i].str != NULL);
1499
1500 expected = (oarg >> args[i].shift) & UINT16_MAX;
1501 found = (arg >> args[i].shift) & UINT16_MAX;
1502 }
1503
1504 dnerror(dnp, args[i - 1].mismatch, "llquantize( ) "
1505 "%s (argument #%d) doesn't match previous "
1506 "declaration: expected %d, found %d\n",
1507 args[i - 1].str, i, expected, found);
1508 }
1509
1510 incr = llarg;
1511 argmax = 6;
1512 }
1513
1514 if (fid->di_id == DTRACEAGG_QUANTIZE) {
1515 incr = dnp->dn_aggfun->dn_args->dn_list;
1516 argmax = 2;
1517 }
1518
1519 if (incr != NULL) {
1520 if (!dt_node_is_scalar(incr)) {
1521 dnerror(dnp, D_PROTO_ARG, "%s( ) increment value "
1522 "(argument #%d) must be of scalar type\n",
1523 fid->di_name, argmax);
1524 }
1525
1526 if ((anp = incr->dn_list) != NULL) {
1527 int argc = argmax;
1528
1529 for (; anp != NULL; anp = anp->dn_list)
1530 argc++;
1531
1532 dnerror(incr, D_PROTO_LEN, "%s( ) prototype "
1533 "mismatch: %d args passed, at most %d expected",
1534 fid->di_name, argc, argmax);
1535 }
1536
1537 ap = dt_stmt_action(dtp, sdp);
1538 n++;
1539
1540 dt_cg(yypcb, incr);
1541 ap->dtad_difo = dt_as(yypcb);
1542 ap->dtad_difo->dtdo_rtype = dt_void_rtype;
1543 ap->dtad_kind = DTRACEACT_DIFEXPR;
1544 }
1545
1546 assert(sdp->dtsd_aggdata == NULL);
1547 sdp->dtsd_aggdata = aid;
1548
1549 ap = dt_stmt_action(dtp, sdp);
1550 assert(fid->di_kind == DT_IDENT_AGGFUNC);
1551 assert(DTRACEACT_ISAGG(fid->di_id));
1552 ap->dtad_kind = fid->di_id;
1553 ap->dtad_ntuple = n;
1554 ap->dtad_arg = arg;
1555
1556 if (dnp->dn_aggfun->dn_args != NULL) {
1557 dt_cg(yypcb, dnp->dn_aggfun->dn_args);
1558 ap->dtad_difo = dt_as(yypcb);
1559 }
1560 }
1561
1562 static void
1563 dt_compile_one_clause(dtrace_hdl_t *dtp, dt_node_t *cnp, dt_node_t *pnp)
1564 {
1565 dtrace_ecbdesc_t *edp;
1566 dtrace_stmtdesc_t *sdp;
1567 dt_node_t *dnp;
1568
1569 yylineno = pnp->dn_line;
1570 dt_setcontext(dtp, pnp->dn_desc);
1571 (void) dt_node_cook(cnp, DT_IDFLG_REF);
1572
1573 if (DT_TREEDUMP_PASS(dtp, 2))
1574 dt_node_printr(cnp, stderr, 0);
1575
1576 if ((edp = dt_ecbdesc_create(dtp, pnp->dn_desc)) == NULL)
1577 longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
1578
1579 assert(yypcb->pcb_ecbdesc == NULL);
1580 yypcb->pcb_ecbdesc = edp;
1581
1582 if (cnp->dn_pred != NULL) {
1583 dt_cg(yypcb, cnp->dn_pred);
1584 edp->dted_pred.dtpdd_difo = dt_as(yypcb);
1585 }
1586
1587 if (cnp->dn_acts == NULL) {
1588 dt_stmt_append(dt_stmt_create(dtp, edp,
1589 cnp->dn_ctxattr, _dtrace_defattr), cnp);
1590 }
1591
1592 for (dnp = cnp->dn_acts; dnp != NULL; dnp = dnp->dn_list) {
1593 assert(yypcb->pcb_stmt == NULL);
1594 sdp = dt_stmt_create(dtp, edp, cnp->dn_ctxattr, cnp->dn_attr);
1595
1596 switch (dnp->dn_kind) {
1597 case DT_NODE_DEXPR:
1598 if (dnp->dn_expr->dn_kind == DT_NODE_AGG)
1599 dt_compile_agg(dtp, dnp->dn_expr, sdp);
1600 else
1601 dt_compile_exp(dtp, dnp, sdp);
1602 break;
1603 case DT_NODE_DFUNC:
1604 dt_compile_fun(dtp, dnp, sdp);
1605 break;
1606 case DT_NODE_AGG:
1607 dt_compile_agg(dtp, dnp, sdp);
1608 break;
1609 default:
1610 dnerror(dnp, D_UNKNOWN, "internal error -- node kind "
1611 "%u is not a valid statement\n", dnp->dn_kind);
1612 }
1613
1614 assert(yypcb->pcb_stmt == sdp);
1615 dt_stmt_append(sdp, dnp);
1616 }
1617
1618 assert(yypcb->pcb_ecbdesc == edp);
1619 dt_ecbdesc_release(dtp, edp);
1620 dt_endcontext(dtp);
1621 yypcb->pcb_ecbdesc = NULL;
1622 }
1623
1624 static void
1625 dt_compile_clause(dtrace_hdl_t *dtp, dt_node_t *cnp)
1626 {
1627 dt_node_t *pnp;
1628
1629 for (pnp = cnp->dn_pdescs; pnp != NULL; pnp = pnp->dn_list)
1630 dt_compile_one_clause(dtp, cnp, pnp);
1631 }
1632
1633 static void
1634 dt_compile_xlator(dt_node_t *dnp)
1635 {
1636 dt_xlator_t *dxp = dnp->dn_xlator;
1637 dt_node_t *mnp;
1638
1639 for (mnp = dnp->dn_members; mnp != NULL; mnp = mnp->dn_list) {
1640 assert(dxp->dx_membdif[mnp->dn_membid] == NULL);
1641 dt_cg(yypcb, mnp);
1642 dxp->dx_membdif[mnp->dn_membid] = dt_as(yypcb);
1643 }
1644 }
1645
1646 void
1647 dt_setcontext(dtrace_hdl_t *dtp, dtrace_probedesc_t *pdp)
1648 {
1649 const dtrace_pattr_t *pap;
1650 dt_probe_t *prp;
1651 dt_provider_t *pvp;
1652 dt_ident_t *idp;
1653 char attrstr[8];
1654 int err;
1655
1656 /*
1657 * Both kernel and pid based providers are allowed to have names
1658 * ending with what could be interpreted as a number. We assume it's
1659 * a pid and that we may need to dynamically create probes for
1660 * that process if:
1661 *
1662 * (1) The provider doesn't exist, or,
1663 * (2) The provider exists and has DTRACE_PRIV_PROC privilege.
1664 *
1665 * On an error, dt_pid_create_probes() will set the error message
1666 * and tag -- we just have to longjmp() out of here.
1667 */
1668 if (isdigit(pdp->dtpd_provider[strlen(pdp->dtpd_provider) - 1]) &&
1669 ((pvp = dt_provider_lookup(dtp, pdp->dtpd_provider)) == NULL ||
1670 pvp->pv_desc.dtvd_priv.dtpp_flags & DTRACE_PRIV_PROC) &&
1671 dt_pid_create_probes(pdp, dtp, yypcb) != 0) {
1672 longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);
1673 }
1674
1675 /*
1676 * Call dt_probe_info() to get the probe arguments and attributes. If
1677 * a representative probe is found, set 'pap' to the probe provider's
1678 * attributes. Otherwise set 'pap' to default Unstable attributes.
1679 */
1680 if ((prp = dt_probe_info(dtp, pdp, &yypcb->pcb_pinfo)) == NULL) {
1681 pap = &_dtrace_prvdesc;
1682 err = dtrace_errno(dtp);
1683 bzero(&yypcb->pcb_pinfo, sizeof (dtrace_probeinfo_t));
1684 yypcb->pcb_pinfo.dtp_attr = pap->dtpa_provider;
1685 yypcb->pcb_pinfo.dtp_arga = pap->dtpa_args;
1686 } else {
1687 pap = &prp->pr_pvp->pv_desc.dtvd_attr;
1688 err = 0;
1689 }
1690
1691 if (err == EDT_NOPROBE && !(yypcb->pcb_cflags & DTRACE_C_ZDEFS)) {
1692 xyerror(D_PDESC_ZERO, "probe description %s:%s:%s:%s does not "
1693 "match any probes\n", pdp->dtpd_provider, pdp->dtpd_mod,
1694 pdp->dtpd_func, pdp->dtpd_name);
1695 }
1696
1697 if (err != EDT_NOPROBE && err != EDT_UNSTABLE && err != 0)
1698 xyerror(D_PDESC_INVAL, "%s\n", dtrace_errmsg(dtp, err));
1699
1700 dt_dprintf("set context to %s:%s:%s:%s [%u] prp=%p attr=%s argc=%d\n",
1701 pdp->dtpd_provider, pdp->dtpd_mod, pdp->dtpd_func, pdp->dtpd_name,
1702 pdp->dtpd_id, (void *)prp, dt_attr_str(yypcb->pcb_pinfo.dtp_attr,
1703 attrstr, sizeof (attrstr)), yypcb->pcb_pinfo.dtp_argc);
1704
1705 /*
1706 * Reset the stability attributes of D global variables that vary
1707 * based on the attributes of the provider and context itself.
1708 */
1709 if ((idp = dt_idhash_lookup(dtp->dt_globals, "probeprov")) != NULL)
1710 idp->di_attr = pap->dtpa_provider;
1711 if ((idp = dt_idhash_lookup(dtp->dt_globals, "probemod")) != NULL)
1712 idp->di_attr = pap->dtpa_mod;
1713 if ((idp = dt_idhash_lookup(dtp->dt_globals, "probefunc")) != NULL)
1714 idp->di_attr = pap->dtpa_func;
1715 if ((idp = dt_idhash_lookup(dtp->dt_globals, "probename")) != NULL)
1716 idp->di_attr = pap->dtpa_name;
1717 if ((idp = dt_idhash_lookup(dtp->dt_globals, "args")) != NULL)
1718 idp->di_attr = pap->dtpa_args;
1719
1720 yypcb->pcb_pdesc = pdp;
1721 yypcb->pcb_probe = prp;
1722 }
1723
1724 /*
1725 * Reset context-dependent variables and state at the end of cooking a D probe
1726 * definition clause. This ensures that external declarations between clauses
1727 * do not reference any stale context-dependent data from the previous clause.
1728 */
1729 void
1730 dt_endcontext(dtrace_hdl_t *dtp)
1731 {
1732 static const char *const cvars[] = {
1733 "probeprov", "probemod", "probefunc", "probename", "args", NULL
1734 };
1735
1736 dt_ident_t *idp;
1737 int i;
1738
1739 for (i = 0; cvars[i] != NULL; i++) {
1740 if ((idp = dt_idhash_lookup(dtp->dt_globals, cvars[i])) != NULL)
1741 idp->di_attr = _dtrace_defattr;
1742 }
1743
1744 yypcb->pcb_pdesc = NULL;
1745 yypcb->pcb_probe = NULL;
1746 }
1747
1748 static int
1749 dt_reduceid(dt_idhash_t *dhp, dt_ident_t *idp, dtrace_hdl_t *dtp)
1750 {
1751 if (idp->di_vers != 0 && idp->di_vers > dtp->dt_vmax)
1752 dt_idhash_delete(dhp, idp);
1753
1754 return (0);
1755 }
1756
1757 /*
1758 * When dtrace_setopt() is called for "version", it calls dt_reduce() to remove
1759 * any identifiers or translators that have been previously defined as bound to
1760 * a version greater than the specified version. Therefore, in our current
1761 * version implementation, establishing a binding is a one-way transformation.
1762 * In addition, no versioning is currently provided for types as our .d library
1763 * files do not define any types and we reserve prefixes DTRACE_ and dtrace_
1764 * for our exclusive use. If required, type versioning will require more work.
1765 */
1766 int
1767 dt_reduce(dtrace_hdl_t *dtp, dt_version_t v)
1768 {
1769 char s[DT_VERSION_STRMAX];
1770 dt_xlator_t *dxp, *nxp;
1771
1772 if (v > dtp->dt_vmax)
1773 return (dt_set_errno(dtp, EDT_VERSREDUCED));
1774 else if (v == dtp->dt_vmax)
1775 return (0); /* no reduction necessary */
1776
1777 dt_dprintf("reducing api version to %s\n",
1778 dt_version_num2str(v, s, sizeof (s)));
1779
1780 dtp->dt_vmax = v;
1781
1782 for (dxp = dt_list_next(&dtp->dt_xlators); dxp != NULL; dxp = nxp) {
1783 nxp = dt_list_next(dxp);
1784 if ((dxp->dx_souid.di_vers != 0 && dxp->dx_souid.di_vers > v) ||
1785 (dxp->dx_ptrid.di_vers != 0 && dxp->dx_ptrid.di_vers > v))
1786 dt_list_delete(&dtp->dt_xlators, dxp);
1787 }
1788
1789 (void) dt_idhash_iter(dtp->dt_macros, (dt_idhash_f *)dt_reduceid, dtp);
1790 (void) dt_idhash_iter(dtp->dt_aggs, (dt_idhash_f *)dt_reduceid, dtp);
1791 (void) dt_idhash_iter(dtp->dt_globals, (dt_idhash_f *)dt_reduceid, dtp);
1792 (void) dt_idhash_iter(dtp->dt_tls, (dt_idhash_f *)dt_reduceid, dtp);
1793
1794 return (0);
1795 }
1796
1797 /*
1798 * Fork and exec the cpp(1) preprocessor to run over the specified input file,
1799 * and return a FILE handle for the cpp output. We use the /dev/fd filesystem
1800 * here to simplify the code by leveraging file descriptor inheritance.
1801 */
1802 static FILE *
1803 dt_preproc(dtrace_hdl_t *dtp, FILE *ifp)
1804 {
1805 int argc = dtp->dt_cpp_argc;
1806 char **argv = malloc(sizeof (char *) * (argc + 5));
1807 FILE *ofp = tmpfile();
1808
1809 char ipath[20], opath[20]; /* big enough for /dev/fd/ + INT_MAX + \0 */
1810 char verdef[32]; /* big enough for -D__SUNW_D_VERSION=0x%08x + \0 */
1811
1812 struct sigaction act, oact;
1813 sigset_t mask, omask;
1814
1815 int wstat, estat;
1816 pid_t pid;
1817 off64_t off;
1818 int c;
1819
1820 if (argv == NULL || ofp == NULL) {
1821 (void) dt_set_errno(dtp, errno);
1822 goto err;
1823 }
1824
1825 /*
1826 * If the input is a seekable file, see if it is an interpreter file.
1827 * If we see #!, seek past the first line because cpp will choke on it.
1828 * We start cpp just prior to the \n at the end of this line so that
1829 * it still sees the newline, ensuring that #line values are correct.
1830 */
1831 if (isatty(fileno(ifp)) == 0 && (off = ftello64(ifp)) != -1) {
1832 if ((c = fgetc(ifp)) == '#' && (c = fgetc(ifp)) == '!') {
1833 for (off += 2; c != '\n'; off++) {
1834 if ((c = fgetc(ifp)) == EOF)
1835 break;
1836 }
1837 if (c == '\n')
1838 off--; /* start cpp just prior to \n */
1839 }
1840 (void) fflush(ifp);
1841 (void) fseeko64(ifp, off, SEEK_SET);
1842 }
1843
1844 (void) snprintf(ipath, sizeof (ipath), "/dev/fd/%d", fileno(ifp));
1845 (void) snprintf(opath, sizeof (opath), "/dev/fd/%d", fileno(ofp));
1846
1847 bcopy(dtp->dt_cpp_argv, argv, sizeof (char *) * argc);
1848
1849 (void) snprintf(verdef, sizeof (verdef),
1850 "-D__SUNW_D_VERSION=0x%08x", dtp->dt_vmax);
1851 argv[argc++] = verdef;
1852
1853 switch (dtp->dt_stdcmode) {
1854 case DT_STDC_XA:
1855 case DT_STDC_XT:
1856 argv[argc++] = "-D__STDC__=0";
1857 break;
1858 case DT_STDC_XC:
1859 argv[argc++] = "-D__STDC__=1";
1860 break;
1861 }
1862
1863 argv[argc++] = ipath;
1864 argv[argc++] = opath;
1865 argv[argc] = NULL;
1866
1867 /*
1868 * libdtrace must be able to be embedded in other programs that may
1869 * include application-specific signal handlers. Therefore, if we
1870 * need to fork to run cpp(1), we must avoid generating a SIGCHLD
1871 * that could confuse the containing application. To do this,
1872 * we block SIGCHLD and reset its disposition to SIG_DFL.
1873 * We restore our signal state once we are done.
1874 */
1875 (void) sigemptyset(&mask);
1876 (void) sigaddset(&mask, SIGCHLD);
1877 (void) sigprocmask(SIG_BLOCK, &mask, &omask);
1878
1879 bzero(&act, sizeof (act));
1880 act.sa_handler = SIG_DFL;
1881 (void) sigaction(SIGCHLD, &act, &oact);
1882
1883 if ((pid = fork1()) == -1) {
1884 (void) sigaction(SIGCHLD, &oact, NULL);
1885 (void) sigprocmask(SIG_SETMASK, &omask, NULL);
1886 (void) dt_set_errno(dtp, EDT_CPPFORK);
1887 goto err;
1888 }
1889
1890 if (pid == 0) {
1891 (void) execvp(dtp->dt_cpp_path, argv);
1892 _exit(errno == ENOENT ? 127 : 126);
1893 }
1894
1895 do {
1896 dt_dprintf("waiting for %s (PID %d)\n", dtp->dt_cpp_path,
1897 (int)pid);
1898 } while (waitpid(pid, &wstat, 0) == -1 && errno == EINTR);
1899
1900 (void) sigaction(SIGCHLD, &oact, NULL);
1901 (void) sigprocmask(SIG_SETMASK, &omask, NULL);
1902
1903 dt_dprintf("%s returned exit status 0x%x\n", dtp->dt_cpp_path, wstat);
1904 estat = WIFEXITED(wstat) ? WEXITSTATUS(wstat) : -1;
1905
1906 if (estat != 0) {
1907 switch (estat) {
1908 case 126:
1909 (void) dt_set_errno(dtp, EDT_CPPEXEC);
1910 break;
1911 case 127:
1912 (void) dt_set_errno(dtp, EDT_CPPENT);
1913 break;
1914 default:
1915 (void) dt_set_errno(dtp, EDT_CPPERR);
1916 }
1917 goto err;
1918 }
1919
1920 free(argv);
1921 (void) fflush(ofp);
1922 (void) fseek(ofp, 0, SEEK_SET);
1923 return (ofp);
1924
1925 err:
1926 free(argv);
1927 (void) fclose(ofp);
1928 return (NULL);
1929 }
1930
1931 static void
1932 dt_lib_depend_error(dtrace_hdl_t *dtp, const char *format, ...)
1933 {
1934 va_list ap;
1935
1936 va_start(ap, format);
1937 dt_set_errmsg(dtp, NULL, NULL, NULL, 0, format, ap);
1938 va_end(ap);
1939 }
1940
1941 int
1942 dt_lib_depend_add(dtrace_hdl_t *dtp, dt_list_t *dlp, const char *arg)
1943 {
1944 dt_lib_depend_t *dld;
1945 const char *end;
1946
1947 assert(arg != NULL);
1948
1949 if ((end = strrchr(arg, '/')) == NULL)
1950 return (dt_set_errno(dtp, EINVAL));
1951
1952 if ((dld = dt_zalloc(dtp, sizeof (dt_lib_depend_t))) == NULL)
1953 return (-1);
1954
1955 if ((dld->dtld_libpath = dt_alloc(dtp, MAXPATHLEN)) == NULL) {
1956 dt_free(dtp, dld);
1957 return (-1);
1958 }
1959
1960 (void) strlcpy(dld->dtld_libpath, arg, end - arg + 2);
1961 if ((dld->dtld_library = strdup(arg)) == NULL) {
1962 dt_free(dtp, dld->dtld_libpath);
1963 dt_free(dtp, dld);
1964 return (dt_set_errno(dtp, EDT_NOMEM));
1965 }
1966
1967 dt_list_append(dlp, dld);
1968 return (0);
1969 }
1970
1971 dt_lib_depend_t *
1972 dt_lib_depend_lookup(dt_list_t *dld, const char *arg)
1973 {
1974 dt_lib_depend_t *dldn;
1975
1976 for (dldn = dt_list_next(dld); dldn != NULL;
1977 dldn = dt_list_next(dldn)) {
1978 if (strcmp(dldn->dtld_library, arg) == 0)
1979 return (dldn);
1980 }
1981
1982 return (NULL);
1983 }
1984
1985 /*
1986 * Go through all the library files, and, if any library dependencies exist for
1987 * that file, add it to that node's list of dependents. The result of this
1988 * will be a graph which can then be topologically sorted to produce a
1989 * compilation order.
1990 */
1991 static int
1992 dt_lib_build_graph(dtrace_hdl_t *dtp)
1993 {
1994 dt_lib_depend_t *dld, *dpld;
1995
1996 for (dld = dt_list_next(&dtp->dt_lib_dep); dld != NULL;
1997 dld = dt_list_next(dld)) {
1998 char *library = dld->dtld_library;
1999
2000 for (dpld = dt_list_next(&dld->dtld_dependencies); dpld != NULL;
2001 dpld = dt_list_next(dpld)) {
2002 dt_lib_depend_t *dlda;
2003
2004 if ((dlda = dt_lib_depend_lookup(&dtp->dt_lib_dep,
2005 dpld->dtld_library)) == NULL) {
2006 dt_lib_depend_error(dtp,
2007 "Invalid library dependency in %s: %s\n",
2008 dld->dtld_library, dpld->dtld_library);
2009
2010 return (dt_set_errno(dtp, EDT_COMPILER));
2011 }
2012
2013 if ((dt_lib_depend_add(dtp, &dlda->dtld_dependents,
2014 library)) != 0) {
2015 return (-1); /* preserve dt_errno */
2016 }
2017 }
2018 }
2019 return (0);
2020 }
2021
2022 static int
2023 dt_topo_sort(dtrace_hdl_t *dtp, dt_lib_depend_t *dld, int *count)
2024 {
2025 dt_lib_depend_t *dpld, *dlda, *new;
2026
2027 dld->dtld_start = ++(*count);
2028
2029 for (dpld = dt_list_next(&dld->dtld_dependents); dpld != NULL;
2030 dpld = dt_list_next(dpld)) {
2031 dlda = dt_lib_depend_lookup(&dtp->dt_lib_dep,
2032 dpld->dtld_library);
2033 assert(dlda != NULL);
2034
2035 if (dlda->dtld_start == 0 &&
2036 dt_topo_sort(dtp, dlda, count) == -1)
2037 return (-1);
2038 }
2039
2040 if ((new = dt_zalloc(dtp, sizeof (dt_lib_depend_t))) == NULL)
2041 return (-1);
2042
2043 if ((new->dtld_library = strdup(dld->dtld_library)) == NULL) {
2044 dt_free(dtp, new);
2045 return (dt_set_errno(dtp, EDT_NOMEM));
2046 }
2047
2048 new->dtld_start = dld->dtld_start;
2049 new->dtld_finish = dld->dtld_finish = ++(*count);
2050 dt_list_prepend(&dtp->dt_lib_dep_sorted, new);
2051
2052 dt_dprintf("library %s sorted (%d/%d)\n", new->dtld_library,
2053 new->dtld_start, new->dtld_finish);
2054
2055 return (0);
2056 }
2057
2058 static int
2059 dt_lib_depend_sort(dtrace_hdl_t *dtp)
2060 {
2061 dt_lib_depend_t *dld, *dpld, *dlda;
2062 int count = 0;
2063
2064 if (dt_lib_build_graph(dtp) == -1)
2065 return (-1); /* preserve dt_errno */
2066
2067 /*
2068 * Perform a topological sort of the graph that hangs off
2069 * dtp->dt_lib_dep. The result of this process will be a
2070 * dependency ordered list located at dtp->dt_lib_dep_sorted.
2071 */
2072 for (dld = dt_list_next(&dtp->dt_lib_dep); dld != NULL;
2073 dld = dt_list_next(dld)) {
2074 if (dld->dtld_start == 0 &&
2075 dt_topo_sort(dtp, dld, &count) == -1)
2076 return (-1); /* preserve dt_errno */;
2077 }
2078
2079 /*
2080 * Check the graph for cycles. If an ancestor's finishing time is
2081 * less than any of its dependent's finishing times then a back edge
2082 * exists in the graph and this is a cycle.
2083 */
2084 for (dld = dt_list_next(&dtp->dt_lib_dep); dld != NULL;
2085 dld = dt_list_next(dld)) {
2086 for (dpld = dt_list_next(&dld->dtld_dependents); dpld != NULL;
2087 dpld = dt_list_next(dpld)) {
2088 dlda = dt_lib_depend_lookup(&dtp->dt_lib_dep_sorted,
2089 dpld->dtld_library);
2090 assert(dlda != NULL);
2091
2092 if (dlda->dtld_finish > dld->dtld_finish) {
2093 dt_lib_depend_error(dtp,
2094 "Cyclic dependency detected: %s => %s\n",
2095 dld->dtld_library, dpld->dtld_library);
2096
2097 return (dt_set_errno(dtp, EDT_COMPILER));
2098 }
2099 }
2100 }
2101
2102 return (0);
2103 }
2104
2105 static void
2106 dt_lib_depend_free(dtrace_hdl_t *dtp)
2107 {
2108 dt_lib_depend_t *dld, *dlda;
2109
2110 while ((dld = dt_list_next(&dtp->dt_lib_dep)) != NULL) {
2111 while ((dlda = dt_list_next(&dld->dtld_dependencies)) != NULL) {
2112 dt_list_delete(&dld->dtld_dependencies, dlda);
2113 dt_free(dtp, dlda->dtld_library);
2114 dt_free(dtp, dlda->dtld_libpath);
2115 dt_free(dtp, dlda);
2116 }
2117 while ((dlda = dt_list_next(&dld->dtld_dependents)) != NULL) {
2118 dt_list_delete(&dld->dtld_dependents, dlda);
2119 dt_free(dtp, dlda->dtld_library);
2120 dt_free(dtp, dlda->dtld_libpath);
2121 dt_free(dtp, dlda);
2122 }
2123 dt_list_delete(&dtp->dt_lib_dep, dld);
2124 dt_free(dtp, dld->dtld_library);
2125 dt_free(dtp, dld->dtld_libpath);
2126 dt_free(dtp, dld);
2127 }
2128
2129 while ((dld = dt_list_next(&dtp->dt_lib_dep_sorted)) != NULL) {
2130 dt_list_delete(&dtp->dt_lib_dep_sorted, dld);
2131 dt_free(dtp, dld->dtld_library);
2132 dt_free(dtp, dld);
2133 }
2134 }
2135
2136 /*
2137 * Open all the .d library files found in the specified directory and
2138 * compile each one of them. We silently ignore any missing directories and
2139 * other files found therein. We only fail (and thereby fail dt_load_libs()) if
2140 * we fail to compile a library and the error is something other than #pragma D
2141 * depends_on. Dependency errors are silently ignored to permit a library
2142 * directory to contain libraries which may not be accessible depending on our
2143 * privileges.
2144 */
2145 static int
2146 dt_load_libs_dir(dtrace_hdl_t *dtp, const char *path)
2147 {
2148 struct dirent *dp;
2149 const char *p, *end;
2150 DIR *dirp;
2151
2152 char fname[PATH_MAX];
2153 FILE *fp;
2154 void *rv;
2155 dt_lib_depend_t *dld;
2156
2157 if ((dirp = opendir(path)) == NULL) {
2158 dt_dprintf("skipping lib dir %s: %s\n", path, strerror(errno));
2159 return (0);
2160 }
2161
2162 /* First, parse each file for library dependencies. */
2163 while ((dp = readdir(dirp)) != NULL) {
2164 if ((p = strrchr(dp->d_name, '.')) == NULL || strcmp(p, ".d"))
2165 continue; /* skip any filename not ending in .d */
2166
2167 (void) snprintf(fname, sizeof (fname),
2168 "%s/%s", path, dp->d_name);
2169
2170 if ((fp = fopen(fname, "rF")) == NULL) {
2171 dt_dprintf("skipping library %s: %s\n",
2172 fname, strerror(errno));
2173 continue;
2174 }
2175
2176 /*
2177 * Skip files whose name match an already processed library
2178 */
2179 for (dld = dt_list_next(&dtp->dt_lib_dep); dld != NULL;
2180 dld = dt_list_next(dld)) {
2181 end = strrchr(dld->dtld_library, '/');
2182 /* dt_lib_depend_add ensures this */
2183 assert(end != NULL);
2184 if (strcmp(end + 1, dp->d_name) == 0)
2185 break;
2186 }
2187
2188 if (dld != NULL) {
2189 dt_dprintf("skipping library %s, already processed "
2190 "library with the same name: %s", dp->d_name,
2191 dld->dtld_library);
2192 (void) fclose(fp);
2193 continue;
2194 }
2195
2196 dtp->dt_filetag = fname;
2197 if (dt_lib_depend_add(dtp, &dtp->dt_lib_dep, fname) != 0) {
2198 (void) fclose(fp);
2199 return (-1); /* preserve dt_errno */
2200 }
2201
2202 rv = dt_compile(dtp, DT_CTX_DPROG,
2203 DTRACE_PROBESPEC_NAME, NULL,
2204 DTRACE_C_EMPTY | DTRACE_C_CTL, 0, NULL, fp, NULL);
2205
2206 if (rv != NULL && dtp->dt_errno &&
2207 (dtp->dt_errno != EDT_COMPILER ||
2208 dtp->dt_errtag != dt_errtag(D_PRAGMA_DEPEND))) {
2209 (void) fclose(fp);
2210 return (-1); /* preserve dt_errno */
2211 }
2212
2213 if (dtp->dt_errno)
2214 dt_dprintf("error parsing library %s: %s\n",
2215 fname, dtrace_errmsg(dtp, dtrace_errno(dtp)));
2216
2217 (void) fclose(fp);
2218 dtp->dt_filetag = NULL;
2219 }
2220
2221 (void) closedir(dirp);
2222
2223 return (0);
2224 }
2225
2226 /*
2227 * Perform a topological sorting of all the libraries found across the entire
2228 * dt_lib_path. Once sorted, compile each one in topological order to cache its
2229 * inlines and translators, etc. We silently ignore any missing directories and
2230 * other files found therein. We only fail (and thereby fail dt_load_libs()) if
2231 * we fail to compile a library and the error is something other than #pragma D
2232 * depends_on. Dependency errors are silently ignored to permit a library
2233 * directory to contain libraries which may not be accessible depending on our
2234 * privileges.
2235 */
2236 static int
2237 dt_load_libs_sort(dtrace_hdl_t *dtp)
2238 {
2239 dtrace_prog_t *pgp;
2240 FILE *fp;
2241 dt_lib_depend_t *dld;
2242
2243 /*
2244 * Finish building the graph containing the library dependencies
2245 * and perform a topological sort to generate an ordered list
2246 * for compilation.
2247 */
2248 if (dt_lib_depend_sort(dtp) == -1)
2249 goto err;
2250
2251 for (dld = dt_list_next(&dtp->dt_lib_dep_sorted); dld != NULL;
2252 dld = dt_list_next(dld)) {
2253
2254 if ((fp = fopen(dld->dtld_library, "r")) == NULL) {
2255 dt_dprintf("skipping library %s: %s\n",
2256 dld->dtld_library, strerror(errno));
2257 continue;
2258 }
2259
2260 dtp->dt_filetag = dld->dtld_library;
2261 pgp = dtrace_program_fcompile(dtp, fp, DTRACE_C_EMPTY, 0, NULL);
2262 (void) fclose(fp);
2263 dtp->dt_filetag = NULL;
2264
2265 if (pgp == NULL && (dtp->dt_errno != EDT_COMPILER ||
2266 dtp->dt_errtag != dt_errtag(D_PRAGMA_DEPEND)))
2267 goto err;
2268
2269 if (pgp == NULL) {
2270 dt_dprintf("skipping library %s: %s\n",
2271 dld->dtld_library,
2272 dtrace_errmsg(dtp, dtrace_errno(dtp)));
2273 } else {
2274 dld->dtld_loaded = B_TRUE;
2275 dt_program_destroy(dtp, pgp);
2276 }
2277 }
2278
2279 dt_lib_depend_free(dtp);
2280 return (0);
2281
2282 err:
2283 dt_lib_depend_free(dtp);
2284 return (-1); /* preserve dt_errno */
2285 }
2286
2287 /*
2288 * Load the contents of any appropriate DTrace .d library files. These files
2289 * contain inlines and translators that will be cached by the compiler. We
2290 * defer this activity until the first compile to permit libdtrace clients to
2291 * add their own library directories and so that we can properly report errors.
2292 */
2293 static int
2294 dt_load_libs(dtrace_hdl_t *dtp)
2295 {
2296 dt_dirpath_t *dirp;
2297
2298 if (dtp->dt_cflags & DTRACE_C_NOLIBS)
2299 return (0); /* libraries already processed */
2300
2301 dtp->dt_cflags |= DTRACE_C_NOLIBS;
2302
2303 /*
2304 * /usr/lib/dtrace is always at the head of the list. The rest of the
2305 * list is specified in the precedence order the user requested. Process
2306 * everything other than the head first. DTRACE_C_NOLIBS has already
2307 * been spcified so dt_vopen will ensure that there is always one entry
2308 * in dt_lib_path.
2309 */
2310 for (dirp = dt_list_next(dt_list_next(&dtp->dt_lib_path));
2311 dirp != NULL; dirp = dt_list_next(dirp)) {
2312 if (dt_load_libs_dir(dtp, dirp->dir_path) != 0) {
2313 dtp->dt_cflags &= ~DTRACE_C_NOLIBS;
2314 return (-1); /* errno is set for us */
2315 }
2316 }
2317
2318 /* Handle /usr/lib/dtrace */
2319 dirp = dt_list_next(&dtp->dt_lib_path);
2320 if (dt_load_libs_dir(dtp, dirp->dir_path) != 0) {
2321 dtp->dt_cflags &= ~DTRACE_C_NOLIBS;
2322 return (-1); /* errno is set for us */
2323 }
2324
2325 if (dt_load_libs_sort(dtp) < 0)
2326 return (-1); /* errno is set for us */
2327
2328 return (0);
2329 }
2330
2331 static void *
2332 dt_compile(dtrace_hdl_t *dtp, int context, dtrace_probespec_t pspec, void *arg,
2333 uint_t cflags, int argc, char *const argv[], FILE *fp, const char *s)
2334 {
2335 dt_node_t *dnp;
2336 dt_decl_t *ddp;
2337 dt_pcb_t pcb;
2338 void *volatile rv;
2339 int err;
2340
2341 if ((fp == NULL && s == NULL) || (cflags & ~DTRACE_C_MASK) != 0) {
2342 (void) dt_set_errno(dtp, EINVAL);
2343 return (NULL);
2344 }
2345
2346 if (dt_list_next(&dtp->dt_lib_path) != NULL && dt_load_libs(dtp) != 0)
2347 return (NULL); /* errno is set for us */
2348
2349 if (dtp->dt_globals->dh_nelems != 0)
2350 (void) dt_idhash_iter(dtp->dt_globals, dt_idreset, NULL);
2351
2352 if (dtp->dt_tls->dh_nelems != 0)
2353 (void) dt_idhash_iter(dtp->dt_tls, dt_idreset, NULL);
2354
2355 if (fp && (cflags & DTRACE_C_CPP) && (fp = dt_preproc(dtp, fp)) == NULL)
2356 return (NULL); /* errno is set for us */
2357
2358 dt_pcb_push(dtp, &pcb);
2359
2360 pcb.pcb_fileptr = fp;
2361 pcb.pcb_string = s;
2362 pcb.pcb_strptr = s;
2363 pcb.pcb_strlen = s ? strlen(s) : 0;
2364 pcb.pcb_sargc = argc;
2365 pcb.pcb_sargv = argv;
2366 pcb.pcb_sflagv = argc ? calloc(argc, sizeof (ushort_t)) : NULL;
2367 pcb.pcb_pspec = pspec;
2368 pcb.pcb_cflags = dtp->dt_cflags | cflags;
2369 pcb.pcb_amin = dtp->dt_amin;
2370 pcb.pcb_yystate = -1;
2371 pcb.pcb_context = context;
2372 pcb.pcb_token = context;
2373
2374 if (context != DT_CTX_DPROG)
2375 yybegin(YYS_EXPR);
2376 else if (cflags & DTRACE_C_CTL)
2377 yybegin(YYS_CONTROL);
2378 else
2379 yybegin(YYS_CLAUSE);
2380
2381 if ((err = setjmp(yypcb->pcb_jmpbuf)) != 0)
2382 goto out;
2383
2384 if (yypcb->pcb_sargc != 0 && yypcb->pcb_sflagv == NULL)
2385 longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
2386
2387 yypcb->pcb_idents = dt_idhash_create("ambiguous", NULL, 0, 0);
2388 yypcb->pcb_locals = dt_idhash_create("clause local", NULL,
2389 DIF_VAR_OTHER_UBASE, DIF_VAR_OTHER_MAX);
2390
2391 if (yypcb->pcb_idents == NULL || yypcb->pcb_locals == NULL)
2392 longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM);
2393
2394 /*
2395 * Invoke the parser to evaluate the D source code. If any errors
2396 * occur during parsing, an error function will be called and we
2397 * will longjmp back to pcb_jmpbuf to abort. If parsing succeeds,
2398 * we optionally display the parse tree if debugging is enabled.
2399 */
2400 if (yyparse() != 0 || yypcb->pcb_root == NULL)
2401 xyerror(D_EMPTY, "empty D program translation unit\n");
2402
2403 yybegin(YYS_DONE);
2404
2405 if (cflags & DTRACE_C_CTL)
2406 goto out;
2407
2408 if (context != DT_CTX_DTYPE && DT_TREEDUMP_PASS(dtp, 1))
2409 dt_node_printr(yypcb->pcb_root, stderr, 0);
2410
2411 if (yypcb->pcb_pragmas != NULL)
2412 (void) dt_idhash_iter(yypcb->pcb_pragmas, dt_idpragma, NULL);
2413
2414 if (argc > 1 && !(yypcb->pcb_cflags & DTRACE_C_ARGREF) &&
2415 !(yypcb->pcb_sflagv[argc - 1] & DT_IDFLG_REF)) {
2416 xyerror(D_MACRO_UNUSED, "extraneous argument '%s' ($%d is "
2417 "not referenced)\n", yypcb->pcb_sargv[argc - 1], argc - 1);
2418 }
2419
2420 /*
2421 * Perform sugar transformations (for "if" / "else") and replace the
2422 * existing clause chain with the new one.
2423 */
2424 if (context == DT_CTX_DPROG) {
2425 dt_node_t *dnp, *next_dnp;
2426 dt_node_t *new_list = NULL;
2427
2428 for (dnp = yypcb->pcb_root->dn_list;
2429 dnp != NULL; dnp = next_dnp) {
2430 /* remove this node from the list */
2431 next_dnp = dnp->dn_list;
2432 dnp->dn_list = NULL;
2433
2434 if (dnp->dn_kind == DT_NODE_CLAUSE)
2435 dnp = dt_compile_sugar(dtp, dnp);
2436 /* append node to the new list */
2437 new_list = dt_node_link(new_list, dnp);
2438 }
2439 yypcb->pcb_root->dn_list = new_list;
2440 }
2441
2442 /*
2443 * If we have successfully created a parse tree for a D program, loop
2444 * over the clauses and actions and instantiate the corresponding
2445 * libdtrace program. If we are parsing a D expression, then we
2446 * simply run the code generator and assembler on the resulting tree.
2447 */
2448 switch (context) {
2449 case DT_CTX_DPROG:
2450 assert(yypcb->pcb_root->dn_kind == DT_NODE_PROG);
2451
2452 if ((dnp = yypcb->pcb_root->dn_list) == NULL &&
2453 !(yypcb->pcb_cflags & DTRACE_C_EMPTY))
2454 xyerror(D_EMPTY, "empty D program translation unit\n");
2455
2456 if ((yypcb->pcb_prog = dt_program_create(dtp)) == NULL)
2457 longjmp(yypcb->pcb_jmpbuf, dtrace_errno(dtp));
2458
2459 for (; dnp != NULL; dnp = dnp->dn_list) {
2460 switch (dnp->dn_kind) {
2461 case DT_NODE_CLAUSE:
2462 if (DT_TREEDUMP_PASS(dtp, 4))
2463 dt_printd(dnp, stderr, 0);
2464 dt_compile_clause(dtp, dnp);
2465 break;
2466 case DT_NODE_XLATOR:
2467 if (dtp->dt_xlatemode == DT_XL_DYNAMIC)
2468 dt_compile_xlator(dnp);
2469 break;
2470 case DT_NODE_PROVIDER:
2471 (void) dt_node_cook(dnp, DT_IDFLG_REF);
2472 break;
2473 }
2474 }
2475
2476 yypcb->pcb_prog->dp_xrefs = yypcb->pcb_asxrefs;
2477 yypcb->pcb_prog->dp_xrefslen = yypcb->pcb_asxreflen;
2478 yypcb->pcb_asxrefs = NULL;
2479 yypcb->pcb_asxreflen = 0;
2480
2481 rv = yypcb->pcb_prog;
2482 break;
2483
2484 case DT_CTX_DEXPR:
2485 (void) dt_node_cook(yypcb->pcb_root, DT_IDFLG_REF);
2486 dt_cg(yypcb, yypcb->pcb_root);
2487 rv = dt_as(yypcb);
2488 break;
2489
2490 case DT_CTX_DTYPE:
2491 ddp = (dt_decl_t *)yypcb->pcb_root; /* root is really a decl */
2492 err = dt_decl_type(ddp, arg);
2493 dt_decl_free(ddp);
2494
2495 if (err != 0)
2496 longjmp(yypcb->pcb_jmpbuf, EDT_COMPILER);
2497
2498 rv = NULL;
2499 break;
2500 }
2501
2502 out:
2503 if (context != DT_CTX_DTYPE && yypcb->pcb_root != NULL &&
2504 DT_TREEDUMP_PASS(dtp, 3))
2505 dt_node_printr(yypcb->pcb_root, stderr, 0);
2506
2507 if (dtp->dt_cdefs_fd != -1 && (ftruncate64(dtp->dt_cdefs_fd, 0) == -1 ||
2508 lseek64(dtp->dt_cdefs_fd, 0, SEEK_SET) == -1 ||
2509 ctf_write(dtp->dt_cdefs->dm_ctfp, dtp->dt_cdefs_fd) == CTF_ERR))
2510 dt_dprintf("failed to update CTF cache: %s\n", strerror(errno));
2511
2512 if (dtp->dt_ddefs_fd != -1 && (ftruncate64(dtp->dt_ddefs_fd, 0) == -1 ||
2513 lseek64(dtp->dt_ddefs_fd, 0, SEEK_SET) == -1 ||
2514 ctf_write(dtp->dt_ddefs->dm_ctfp, dtp->dt_ddefs_fd) == CTF_ERR))
2515 dt_dprintf("failed to update CTF cache: %s\n", strerror(errno));
2516
2517 if (yypcb->pcb_fileptr && (cflags & DTRACE_C_CPP))
2518 (void) fclose(yypcb->pcb_fileptr); /* close dt_preproc() file */
2519
2520 dt_pcb_pop(dtp, err);
2521 (void) dt_set_errno(dtp, err);
2522 return (err ? NULL : rv);
2523 }
2524
2525 dtrace_prog_t *
2526 dtrace_program_strcompile(dtrace_hdl_t *dtp, const char *s,
2527 dtrace_probespec_t spec, uint_t cflags, int argc, char *const argv[])
2528 {
2529 return (dt_compile(dtp, DT_CTX_DPROG,
2530 spec, NULL, cflags, argc, argv, NULL, s));
2531 }
2532
2533 dtrace_prog_t *
2534 dtrace_program_fcompile(dtrace_hdl_t *dtp, FILE *fp,
2535 uint_t cflags, int argc, char *const argv[])
2536 {
2537 return (dt_compile(dtp, DT_CTX_DPROG,
2538 DTRACE_PROBESPEC_NAME, NULL, cflags, argc, argv, fp, NULL));
2539 }
2540
2541 int
2542 dtrace_type_strcompile(dtrace_hdl_t *dtp, const char *s, dtrace_typeinfo_t *dtt)
2543 {
2544 (void) dt_compile(dtp, DT_CTX_DTYPE,
2545 DTRACE_PROBESPEC_NONE, dtt, 0, 0, NULL, NULL, s);
2546 return (dtp->dt_errno ? -1 : 0);
2547 }
2548
2549 int
2550 dtrace_type_fcompile(dtrace_hdl_t *dtp, FILE *fp, dtrace_typeinfo_t *dtt)
2551 {
2552 (void) dt_compile(dtp, DT_CTX_DTYPE,
2553 DTRACE_PROBESPEC_NONE, dtt, 0, 0, NULL, fp, NULL);
2554 return (dtp->dt_errno ? -1 : 0);
2555 }