1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2005-2007, Joseph Koshy
5 * Copyright (c) 2007 The FreeBSD Foundation
6 * All rights reserved.
7 *
8 * Portions of this software were developed by A. Joseph Koshy under
9 * sponsorship from the FreeBSD Foundation and Google, Inc.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 /*
34 * Transform a hwpmc(4) log into human readable form, and into
35 * gprof(1) compatible profiles.
36 */
37
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD: stable/12/usr.sbin/pmcstat/pmcpl_callgraph.c 334595 2018-06-04 01:10:23Z mmacy $");
40
41 #include <sys/param.h>
42 #include <sys/endian.h>
43 #include <sys/gmon.h>
44 #include <sys/imgact_aout.h>
45 #include <sys/imgact_elf.h>
46 #include <sys/mman.h>
47 #include <sys/pmc.h>
48 #include <sys/queue.h>
49 #include <sys/socket.h>
50 #include <sys/stat.h>
51 #include <sys/wait.h>
52
53 #include <netinet/in.h>
54
55 #include <assert.h>
56 #include <curses.h>
57 #include <err.h>
58 #include <errno.h>
59 #include <fcntl.h>
60 #include <gelf.h>
61 #include <libgen.h>
62 #include <limits.h>
63 #include <netdb.h>
64 #include <pmc.h>
65 #include <pmclog.h>
66 #include <sysexits.h>
67 #include <stdint.h>
68 #include <stdio.h>
69 #include <stdlib.h>
70 #include <string.h>
71 #include <unistd.h>
72
73 #include "pmcstat.h"
74 #include "pmcstat_log.h"
75 #include "pmcstat_top.h"
76 #include "pmcpl_callgraph.h"
77
78 #define min(A,B) ((A) < (B) ? (A) : (B))
79 #define max(A,B) ((A) > (B) ? (A) : (B))
80
81 /* Get the sample value in percent related to nsamples. */
82 #define PMCPL_CG_COUNTP(a) \
83 ((a)->pcg_count * 100.0 / nsamples)
84
85 /*
86 * The toplevel CG nodes (i.e., with rank == 0) are placed in a hash table.
87 */
88
89 struct pmcstat_cgnode_hash_list pmcstat_cgnode_hash[PMCSTAT_NHASH];
90 int pmcstat_cgnode_hash_count;
91
92 static pmcstat_interned_string pmcstat_previous_filename_printed;
93
94 static struct pmcstat_cgnode *
pmcstat_cgnode_allocate(struct pmcstat_image * image,uintfptr_t pc)95 pmcstat_cgnode_allocate(struct pmcstat_image *image, uintfptr_t pc)
96 {
97 struct pmcstat_cgnode *cg;
98
99 if ((cg = malloc(sizeof(*cg))) == NULL)
100 err(EX_OSERR, "ERROR: Cannot allocate callgraph node");
101
102 cg->pcg_image = image;
103 cg->pcg_func = pc;
104
105 cg->pcg_count = 0;
106 cg->pcg_nchildren = 0;
107 LIST_INIT(&cg->pcg_children);
108
109 return (cg);
110 }
111
112 /*
113 * Free a node and its children.
114 */
115 static void
pmcstat_cgnode_free(struct pmcstat_cgnode * cg)116 pmcstat_cgnode_free(struct pmcstat_cgnode *cg)
117 {
118 struct pmcstat_cgnode *cgc, *cgtmp;
119
120 LIST_FOREACH_SAFE(cgc, &cg->pcg_children, pcg_sibling, cgtmp)
121 pmcstat_cgnode_free(cgc);
122 free(cg);
123 }
124
125 /*
126 * Look for a callgraph node associated with pmc `pmcid' in the global
127 * hash table that corresponds to the given `pc' value in the process
128 * `pp'.
129 */
130 static struct pmcstat_cgnode *
pmcstat_cgnode_hash_lookup_pc(struct pmcstat_process * pp,pmc_id_t pmcid,uintfptr_t pc,int usermode)131 pmcstat_cgnode_hash_lookup_pc(struct pmcstat_process *pp, pmc_id_t pmcid,
132 uintfptr_t pc, int usermode)
133 {
134 struct pmcstat_pcmap *ppm;
135 struct pmcstat_symbol *sym;
136 struct pmcstat_image *image;
137 struct pmcstat_cgnode *cg;
138 struct pmcstat_cgnode_hash *h;
139 uintfptr_t loadaddress;
140 unsigned int i, hash;
141
142 ppm = pmcstat_process_find_map(usermode ? pp : pmcstat_kernproc, pc);
143 if (ppm == NULL)
144 return (NULL);
145
146 image = ppm->ppm_image;
147
148 loadaddress = ppm->ppm_lowpc + image->pi_vaddr - image->pi_start;
149 pc -= loadaddress; /* Convert to an offset in the image. */
150
151 /*
152 * Try determine the function at this offset. If we can't
153 * find a function round leave the `pc' value alone.
154 */
155 if ((sym = pmcstat_symbol_search(image, pc)) != NULL)
156 pc = sym->ps_start;
157 else
158 pmcstat_stats.ps_samples_unknown_function++;
159
160 for (hash = i = 0; i < sizeof(uintfptr_t); i++)
161 hash += (pc >> i) & 0xFF;
162
163 hash &= PMCSTAT_HASH_MASK;
164
165 cg = NULL;
166 LIST_FOREACH(h, &pmcstat_cgnode_hash[hash], pch_next)
167 {
168 if (h->pch_pmcid != pmcid)
169 continue;
170
171 cg = h->pch_cgnode;
172
173 assert(cg != NULL);
174
175 if (cg->pcg_image == image && cg->pcg_func == pc)
176 return (cg);
177 }
178
179 /*
180 * We haven't seen this (pmcid, pc) tuple yet, so allocate a
181 * new callgraph node and a new hash table entry for it.
182 */
183 cg = pmcstat_cgnode_allocate(image, pc);
184 if ((h = malloc(sizeof(*h))) == NULL)
185 err(EX_OSERR, "ERROR: Could not allocate callgraph node");
186
187 h->pch_pmcid = pmcid;
188 h->pch_cgnode = cg;
189 LIST_INSERT_HEAD(&pmcstat_cgnode_hash[hash], h, pch_next);
190
191 pmcstat_cgnode_hash_count++;
192
193 return (cg);
194 }
195
196 /*
197 * Compare two callgraph nodes for sorting.
198 */
199 static int
pmcstat_cgnode_compare(const void * a,const void * b)200 pmcstat_cgnode_compare(const void *a, const void *b)
201 {
202 const struct pmcstat_cgnode *const *pcg1, *const *pcg2, *cg1, *cg2;
203
204 pcg1 = (const struct pmcstat_cgnode *const *) a;
205 cg1 = *pcg1;
206 pcg2 = (const struct pmcstat_cgnode *const *) b;
207 cg2 = *pcg2;
208
209 /* Sort in reverse order */
210 if (cg1->pcg_count < cg2->pcg_count)
211 return (1);
212 if (cg1->pcg_count > cg2->pcg_count)
213 return (-1);
214 return (0);
215 }
216
217 /*
218 * Find (allocating if a needed) a callgraph node in the given
219 * parent with the same (image, pcoffset) pair.
220 */
221
222 static struct pmcstat_cgnode *
pmcstat_cgnode_find(struct pmcstat_cgnode * parent,struct pmcstat_image * image,uintfptr_t pcoffset)223 pmcstat_cgnode_find(struct pmcstat_cgnode *parent, struct pmcstat_image *image,
224 uintfptr_t pcoffset)
225 {
226 struct pmcstat_cgnode *child;
227
228 LIST_FOREACH(child, &parent->pcg_children, pcg_sibling) {
229 if (child->pcg_image == image &&
230 child->pcg_func == pcoffset)
231 return (child);
232 }
233
234 /*
235 * Allocate a new structure.
236 */
237
238 child = pmcstat_cgnode_allocate(image, pcoffset);
239
240 /*
241 * Link it into the parent.
242 */
243 LIST_INSERT_HEAD(&parent->pcg_children, child, pcg_sibling);
244 parent->pcg_nchildren++;
245
246 return (child);
247 }
248
249 /*
250 * Print one callgraph node. The output format is:
251 *
252 * indentation %(parent's samples) #nsamples function@object
253 */
254 static void
pmcstat_cgnode_print(struct pmcstat_cgnode * cg,int depth,uint32_t total)255 pmcstat_cgnode_print(struct pmcstat_cgnode *cg, int depth, uint32_t total)
256 {
257 uint32_t n;
258 const char *space;
259 struct pmcstat_symbol *sym;
260 struct pmcstat_cgnode **sortbuffer, **cgn, *pcg;
261
262 space = " ";
263
264 if (depth > 0)
265 (void) fprintf(args.pa_graphfile, "%*s", depth, space);
266
267 if (cg->pcg_count == total)
268 (void) fprintf(args.pa_graphfile, "100.0%% ");
269 else
270 (void) fprintf(args.pa_graphfile, "%05.2f%% ",
271 100.0 * cg->pcg_count / total);
272
273 n = fprintf(args.pa_graphfile, " [%u] ", cg->pcg_count);
274
275 /* #samples is a 12 character wide field. */
276 if (n < 12)
277 (void) fprintf(args.pa_graphfile, "%*s", 12 - n, space);
278
279 if (depth > 0)
280 (void) fprintf(args.pa_graphfile, "%*s", depth, space);
281
282 sym = pmcstat_symbol_search(cg->pcg_image, cg->pcg_func);
283 if (sym)
284 (void) fprintf(args.pa_graphfile, "%s",
285 pmcstat_string_unintern(sym->ps_name));
286 else
287 (void) fprintf(args.pa_graphfile, "%p",
288 (void *) (cg->pcg_image->pi_vaddr + cg->pcg_func));
289
290 if (pmcstat_previous_filename_printed !=
291 cg->pcg_image->pi_fullpath) {
292 pmcstat_previous_filename_printed = cg->pcg_image->pi_fullpath;
293 (void) fprintf(args.pa_graphfile, " @ %s\n",
294 pmcstat_string_unintern(
295 pmcstat_previous_filename_printed));
296 } else
297 (void) fprintf(args.pa_graphfile, "\n");
298
299 if (cg->pcg_nchildren == 0)
300 return;
301
302 if ((sortbuffer = (struct pmcstat_cgnode **)
303 malloc(sizeof(struct pmcstat_cgnode *) *
304 cg->pcg_nchildren)) == NULL)
305 err(EX_OSERR, "ERROR: Cannot print callgraph");
306 cgn = sortbuffer;
307
308 LIST_FOREACH(pcg, &cg->pcg_children, pcg_sibling)
309 *cgn++ = pcg;
310
311 assert(cgn - sortbuffer == (int) cg->pcg_nchildren);
312
313 qsort(sortbuffer, cg->pcg_nchildren, sizeof(struct pmcstat_cgnode *),
314 pmcstat_cgnode_compare);
315
316 for (cgn = sortbuffer, n = 0; n < cg->pcg_nchildren; n++, cgn++)
317 pmcstat_cgnode_print(*cgn, depth+1, cg->pcg_count);
318
319 free(sortbuffer);
320 }
321
322 /*
323 * Record a callchain.
324 */
325
326 void
pmcpl_cg_process(struct pmcstat_process * pp,struct pmcstat_pmcrecord * pmcr,uint32_t nsamples,uintfptr_t * cc,int usermode,uint32_t cpu)327 pmcpl_cg_process(struct pmcstat_process *pp, struct pmcstat_pmcrecord *pmcr,
328 uint32_t nsamples, uintfptr_t *cc, int usermode, uint32_t cpu)
329 {
330 uintfptr_t pc, loadaddress;
331 uint32_t n;
332 struct pmcstat_image *image;
333 struct pmcstat_pcmap *ppm;
334 struct pmcstat_symbol *sym;
335 struct pmcstat_cgnode *parent, *child;
336 struct pmcstat_process *km;
337 pmc_id_t pmcid;
338
339 (void) cpu;
340
341 /*
342 * Find the callgraph node recorded in the global hash table
343 * for this (pmcid, pc).
344 */
345
346 pc = cc[0];
347 pmcid = pmcr->pr_pmcid;
348 child = parent = pmcstat_cgnode_hash_lookup_pc(pp, pmcid, pc, usermode);
349 if (parent == NULL) {
350 pmcstat_stats.ps_callchain_dubious_frames++;
351 pmcr->pr_dubious_frames++;
352 return;
353 }
354
355 parent->pcg_count++;
356
357 /*
358 * For each return address in the call chain record, subject
359 * to the maximum depth desired.
360 * - Find the image associated with the sample. Stop if there
361 * there is no valid image at that address.
362 * - Find the function that overlaps the return address.
363 * - If found: use the start address of the function.
364 * If not found (say an object's symbol table is not present or
365 * is incomplete), round down to th gprof bucket granularity.
366 * - Convert return virtual address to an offset in the image.
367 * - Look for a child with the same {offset,image} tuple,
368 * inserting one if needed.
369 * - Increment the count of occurrences of the child.
370 */
371 km = pmcstat_kernproc;
372
373 for (n = 1; n < (uint32_t) args.pa_graphdepth && n < nsamples; n++,
374 parent = child) {
375 pc = cc[n];
376
377 ppm = pmcstat_process_find_map(usermode ? pp : km, pc);
378 if (ppm == NULL) {
379 /* Detect full frame capture (kernel + user). */
380 if (!usermode) {
381 ppm = pmcstat_process_find_map(pp, pc);
382 if (ppm != NULL)
383 km = pp;
384 }
385 }
386 if (ppm == NULL)
387 continue;
388
389 image = ppm->ppm_image;
390 loadaddress = ppm->ppm_lowpc + image->pi_vaddr -
391 image->pi_start;
392 pc -= loadaddress;
393
394 if ((sym = pmcstat_symbol_search(image, pc)) != NULL)
395 pc = sym->ps_start;
396
397 child = pmcstat_cgnode_find(parent, image, pc);
398 child->pcg_count++;
399 }
400 }
401
402 /*
403 * Printing a callgraph for a PMC.
404 */
405 static void
pmcstat_callgraph_print_for_pmcid(struct pmcstat_pmcrecord * pmcr)406 pmcstat_callgraph_print_for_pmcid(struct pmcstat_pmcrecord *pmcr)
407 {
408 int n, nentries;
409 uint32_t nsamples;
410 pmc_id_t pmcid;
411 struct pmcstat_cgnode **sortbuffer, **cgn;
412 struct pmcstat_cgnode_hash *pch;
413
414 /*
415 * We pull out all callgraph nodes in the top-level hash table
416 * with a matching PMC id. We then sort these based on the
417 * frequency of occurrence. Each callgraph node is then
418 * printed.
419 */
420
421 nsamples = 0;
422 pmcid = pmcr->pr_pmcid;
423 if ((sortbuffer = (struct pmcstat_cgnode **)
424 malloc(sizeof(struct pmcstat_cgnode *) *
425 pmcstat_cgnode_hash_count)) == NULL)
426 err(EX_OSERR, "ERROR: Cannot sort callgraph");
427 cgn = sortbuffer;
428
429 for (n = 0; n < PMCSTAT_NHASH; n++)
430 LIST_FOREACH(pch, &pmcstat_cgnode_hash[n], pch_next)
431 if (pch->pch_pmcid == pmcid) {
432 nsamples += pch->pch_cgnode->pcg_count;
433 *cgn++ = pch->pch_cgnode;
434 }
435
436 nentries = cgn - sortbuffer;
437 assert(nentries <= pmcstat_cgnode_hash_count);
438
439 if (nentries == 0) {
440 free(sortbuffer);
441 return;
442 }
443
444 qsort(sortbuffer, nentries, sizeof(struct pmcstat_cgnode *),
445 pmcstat_cgnode_compare);
446
447 (void) fprintf(args.pa_graphfile,
448 "@ %s [%u samples]\n\n",
449 pmcstat_string_unintern(pmcr->pr_pmcname),
450 nsamples);
451
452 for (cgn = sortbuffer, n = 0; n < nentries; n++, cgn++) {
453 pmcstat_previous_filename_printed = NULL;
454 pmcstat_cgnode_print(*cgn, 0, nsamples);
455 (void) fprintf(args.pa_graphfile, "\n");
456 }
457
458 free(sortbuffer);
459 }
460
461 /*
462 * Print out callgraphs.
463 */
464
465 static void
pmcstat_callgraph_print(void)466 pmcstat_callgraph_print(void)
467 {
468 struct pmcstat_pmcrecord *pmcr;
469
470 LIST_FOREACH(pmcr, &pmcstat_pmcs, pr_next)
471 pmcstat_callgraph_print_for_pmcid(pmcr);
472 }
473
474 static void
pmcstat_cgnode_topprint(struct pmcstat_cgnode * cg,int depth __unused,uint32_t nsamples)475 pmcstat_cgnode_topprint(struct pmcstat_cgnode *cg,
476 int depth __unused, uint32_t nsamples)
477 {
478 int v_attrs, vs_len, ns_len, width, len, n, nchildren;
479 float v;
480 char ns[30], vs[10];
481 struct pmcstat_symbol *sym;
482 struct pmcstat_cgnode **sortbuffer, **cgn, *pcg;
483
484 /* Format value. */
485 v = PMCPL_CG_COUNTP(cg);
486 snprintf(vs, sizeof(vs), "%.1f", v);
487 v_attrs = PMCSTAT_ATTRPERCENT(v);
488 sym = NULL;
489
490 /* Format name. */
491 if (!(args.pa_flags & FLAG_SKIP_TOP_FN_RES))
492 sym = pmcstat_symbol_search(cg->pcg_image, cg->pcg_func);
493 if (sym != NULL) {
494 snprintf(ns, sizeof(ns), "%s",
495 pmcstat_string_unintern(sym->ps_name));
496 } else
497 snprintf(ns, sizeof(ns), "%p",
498 (void *)(cg->pcg_image->pi_vaddr + cg->pcg_func));
499
500 PMCSTAT_ATTRON(v_attrs);
501 PMCSTAT_PRINTW("%5.5s", vs);
502 PMCSTAT_ATTROFF(v_attrs);
503 PMCSTAT_PRINTW(" %-10.10s %-20.20s",
504 pmcstat_string_unintern(cg->pcg_image->pi_name),
505 ns);
506
507 nchildren = cg->pcg_nchildren;
508 if (nchildren == 0) {
509 PMCSTAT_PRINTW("\n");
510 return;
511 }
512
513 width = pmcstat_displaywidth - 40;
514
515 if ((sortbuffer = (struct pmcstat_cgnode **)
516 malloc(sizeof(struct pmcstat_cgnode *) *
517 nchildren)) == NULL)
518 err(EX_OSERR, "ERROR: Cannot print callgraph");
519 cgn = sortbuffer;
520
521 LIST_FOREACH(pcg, &cg->pcg_children, pcg_sibling)
522 *cgn++ = pcg;
523
524 assert(cgn - sortbuffer == (int)nchildren);
525
526 qsort(sortbuffer, nchildren, sizeof(struct pmcstat_cgnode *),
527 pmcstat_cgnode_compare);
528
529 /* Count how many callers. */
530 for (cgn = sortbuffer, n = 0; n < nchildren; n++, cgn++) {
531 pcg = *cgn;
532
533 v = PMCPL_CG_COUNTP(pcg);
534 if (v < pmcstat_threshold)
535 break;
536 }
537 nchildren = n;
538
539 for (cgn = sortbuffer, n = 0; n < nchildren; n++, cgn++) {
540 pcg = *cgn;
541
542 /* Format value. */
543 if (nchildren > 1) {
544 v = PMCPL_CG_COUNTP(pcg);
545 vs_len = snprintf(vs, sizeof(vs), ":%.1f", v);
546 v_attrs = PMCSTAT_ATTRPERCENT(v);
547 } else
548 vs_len = 0;
549
550 /* Format name. */
551 sym = pmcstat_symbol_search(pcg->pcg_image, pcg->pcg_func);
552 if (sym != NULL) {
553 ns_len = snprintf(ns, sizeof(ns), "%s",
554 pmcstat_string_unintern(sym->ps_name));
555 } else
556 ns_len = snprintf(ns, sizeof(ns), "%p",
557 (void *)pcg->pcg_func);
558
559 len = ns_len + vs_len + 1;
560 if (width - len < 0) {
561 PMCSTAT_PRINTW(" ...");
562 break;
563 }
564 width -= len;
565
566 PMCSTAT_PRINTW(" %s", ns);
567 if (nchildren > 1) {
568 PMCSTAT_ATTRON(v_attrs);
569 PMCSTAT_PRINTW("%s", vs);
570 PMCSTAT_ATTROFF(v_attrs);
571 }
572 }
573 PMCSTAT_PRINTW("\n");
574 free(sortbuffer);
575 }
576
577 /*
578 * Top mode display.
579 */
580
581 void
pmcpl_cg_topdisplay(void)582 pmcpl_cg_topdisplay(void)
583 {
584 int n, nentries;
585 uint32_t nsamples;
586 struct pmcstat_cgnode **sortbuffer, **cgn;
587 struct pmcstat_cgnode_hash *pch;
588 struct pmcstat_pmcrecord *pmcr;
589
590 pmcr = pmcstat_pmcindex_to_pmcr(pmcstat_pmcinfilter);
591 if (!pmcr)
592 err(EX_SOFTWARE, "ERROR: invalid pmcindex");
593
594 /*
595 * We pull out all callgraph nodes in the top-level hash table
596 * with a matching PMC index. We then sort these based on the
597 * frequency of occurrence. Each callgraph node is then
598 * printed.
599 */
600
601 nsamples = 0;
602
603 if ((sortbuffer = (struct pmcstat_cgnode **)
604 malloc(sizeof(struct pmcstat_cgnode *) *
605 pmcstat_cgnode_hash_count)) == NULL)
606 err(EX_OSERR, "ERROR: Cannot sort callgraph");
607 cgn = sortbuffer;
608
609 for (n = 0; n < PMCSTAT_NHASH; n++)
610 LIST_FOREACH(pch, &pmcstat_cgnode_hash[n], pch_next)
611 if (pmcr == NULL || pch->pch_pmcid == pmcr->pr_pmcid) {
612 nsamples += pch->pch_cgnode->pcg_count;
613 *cgn++ = pch->pch_cgnode;
614 }
615
616 nentries = cgn - sortbuffer;
617 assert(nentries <= pmcstat_cgnode_hash_count);
618
619 if (nentries == 0) {
620 free(sortbuffer);
621 return;
622 }
623
624 qsort(sortbuffer, nentries, sizeof(struct pmcstat_cgnode *),
625 pmcstat_cgnode_compare);
626
627 PMCSTAT_PRINTW("%5.5s %-10.10s %-20.20s %s\n",
628 "%SAMP", "IMAGE", "FUNCTION", "CALLERS");
629
630 nentries = min(pmcstat_displayheight - 2, nentries);
631
632 for (cgn = sortbuffer, n = 0; n < nentries; n++, cgn++) {
633 if (PMCPL_CG_COUNTP(*cgn) < pmcstat_threshold)
634 break;
635 pmcstat_cgnode_topprint(*cgn, 0, nsamples);
636 }
637
638 free(sortbuffer);
639 }
640
641 /*
642 * Handle top mode keypress.
643 */
644
645 int
pmcpl_cg_topkeypress(int c,void * arg)646 pmcpl_cg_topkeypress(int c, void *arg)
647 {
648 WINDOW *w;
649
650 w = (WINDOW *)arg;
651
652 (void) c; (void) w;
653
654 return 0;
655 }
656
657 int
pmcpl_cg_init(void)658 pmcpl_cg_init(void)
659 {
660 int i;
661
662 pmcstat_cgnode_hash_count = 0;
663 pmcstat_previous_filename_printed = NULL;
664
665 for (i = 0; i < PMCSTAT_NHASH; i++) {
666 LIST_INIT(&pmcstat_cgnode_hash[i]);
667 }
668
669 return (0);
670 }
671
672 void
pmcpl_cg_shutdown(FILE * mf)673 pmcpl_cg_shutdown(FILE *mf)
674 {
675 int i;
676 struct pmcstat_cgnode_hash *pch, *pchtmp;
677
678 (void) mf;
679
680 if (args.pa_flags & FLAG_DO_CALLGRAPHS)
681 pmcstat_callgraph_print();
682
683 /*
684 * Free memory.
685 */
686 for (i = 0; i < PMCSTAT_NHASH; i++) {
687 LIST_FOREACH_SAFE(pch, &pmcstat_cgnode_hash[i], pch_next,
688 pchtmp) {
689 pmcstat_cgnode_free(pch->pch_cgnode);
690 LIST_REMOVE(pch, pch_next);
691 free(pch);
692 }
693 }
694 }
695
696