1 #define _XOPEN_SOURCE 500 /* needed for nftw() */
2 #define _GNU_SOURCE /* needed for asprintf() */
3
4 /* Parse event JSON files */
5
6 /*
7 * Copyright (c) 2014, Intel Corporation
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright notice,
14 * this list of conditions and the following disclaimer.
15 *
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 COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
26 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
27 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
29 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
31 * OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <errno.h>
37 #include <string.h>
38 #include <ctype.h>
39 #include <unistd.h>
40 #include <stdarg.h>
41 #include <libgen.h>
42 #include <dirent.h>
43 #include <sys/time.h> /* getrlimit */
44 #include <sys/resource.h> /* getrlimit */
45 #include <ftw.h>
46 #include <sys/stat.h>
47 #include "jsmn.h"
48 #include "json.h"
49 #include "jevents.h"
50
51 int verbose;
52 char *prog;
53
eprintf(int level,int var,const char * fmt,...)54 int eprintf(int level, int var, const char *fmt, ...)
55 {
56
57 int ret;
58 va_list args;
59
60 if (var < level)
61 return 0;
62
63 va_start(args, fmt);
64
65 ret = vfprintf(stderr, fmt, args);
66
67 va_end(args);
68
69 return ret;
70 }
71
get_cpu_str(void)72 __attribute__((weak)) char *get_cpu_str(void)
73 {
74 return NULL;
75 }
76
addfield(char * map,char ** dst,const char * sep,const char * a,jsmntok_t * bt)77 static void addfield(char *map, char **dst, const char *sep,
78 const char *a, jsmntok_t *bt)
79 {
80 unsigned int len = strlen(a) + 1 + strlen(sep);
81 int olen = *dst ? strlen(*dst) : 0;
82 int blen = bt ? json_len(bt) : 0;
83 char *out;
84
85 out = realloc(*dst, len + olen + blen);
86 if (!out) {
87 /* Don't add field in this case */
88 return;
89 }
90 *dst = out;
91
92 if (!olen)
93 *(*dst) = 0;
94 else
95 strcat(*dst, sep);
96 strcat(*dst, a);
97 if (bt)
98 strncat(*dst, map + bt->start, blen);
99 }
100
fixname(char * s)101 static void fixname(char *s)
102 {
103 for (; *s; s++)
104 *s = tolower(*s);
105 }
106
fixdesc(char * s)107 static void fixdesc(char *s)
108 {
109 char *e = s + strlen(s);
110
111 /* Remove trailing dots that look ugly in perf list */
112 --e;
113 while (e >= s && isspace(*e))
114 --e;
115 if (*e == '.')
116 *e = 0;
117 }
118
119 static struct msrmap {
120 const char *num;
121 const char *pname;
122 } msrmap[] = {
123 { "0x3F6", "ldlat=" },
124 { "0x1A6", "offcore_rsp=" },
125 { "0x1A7", "offcore_rsp=" },
126 { "0x3F7", "frontend=" },
127 { NULL, NULL }
128 };
129
130 static struct field {
131 const char *field;
132 const char *kernel;
133 } fields[] = {
134 { "UMask", "umask=" },
135 { "CounterMask", "cmask=" },
136 { "Invert", "inv=" },
137 { "AnyThread", "any=" },
138 { "EdgeDetect", "edge=" },
139 { "SampleAfterValue", "period=" },
140 { "FCMask", "fc_mask=" },
141 { "PortMask", "ch_mask=" },
142 { NULL, NULL }
143 };
144
cut_comma(char * map,jsmntok_t * newval)145 static void cut_comma(char *map, jsmntok_t *newval)
146 {
147 int i;
148
149 /* Cut off everything after comma */
150 for (i = newval->start; i < newval->end; i++) {
151 if (map[i] == ',')
152 newval->end = i;
153 }
154 }
155
match_field(char * map,jsmntok_t * field,int nz,char ** event,jsmntok_t * val)156 static int match_field(char *map, jsmntok_t *field, int nz,
157 char **event, jsmntok_t *val)
158 {
159 struct field *f;
160 jsmntok_t newval = *val;
161
162 for (f = fields; f->field; f++)
163 if (json_streq(map, field, f->field) && nz) {
164 cut_comma(map, &newval);
165 addfield(map, event, ",", f->kernel, &newval);
166 return 1;
167 }
168 return 0;
169 }
170
lookup_msr(char * map,jsmntok_t * val)171 static struct msrmap *lookup_msr(char *map, jsmntok_t *val)
172 {
173 jsmntok_t newval = *val;
174 static bool warned;
175 int i;
176
177 cut_comma(map, &newval);
178 for (i = 0; msrmap[i].num; i++)
179 if (json_streq(map, &newval, msrmap[i].num))
180 return &msrmap[i];
181 if (!warned) {
182 warned = true;
183 pr_err("%s: Unknown MSR in event file %.*s\n", prog,
184 json_len(val), map + val->start);
185 }
186 return NULL;
187 }
188
189 static struct map {
190 const char *json;
191 const char *perf;
192 } unit_to_pmu[] = {
193 { "CBO", "uncore_cbox" },
194 { "QPI LL", "uncore_qpi" },
195 { "SBO", "uncore_sbox" },
196 { "iMPH-U", "uncore_arb" },
197 {}
198 };
199
field_to_perf(struct map * table,char * map,jsmntok_t * val)200 static const char *field_to_perf(struct map *table, char *map, jsmntok_t *val)
201 {
202 int i;
203
204 for (i = 0; table[i].json; i++) {
205 if (json_streq(map, val, table[i].json))
206 return table[i].perf;
207 }
208 return NULL;
209 }
210
211 #define EXPECT(e, t, m) do { if (!(e)) { \
212 jsmntok_t *loc = (t); \
213 if (!(t)->start && (t) > tokens) \
214 loc = (t) - 1; \
215 pr_err("%s:%d: " m ", got %s\n", fn, \
216 json_line(map, loc), \
217 json_name(t)); \
218 goto out_free; \
219 } } while (0)
220
221 #define TOPIC_DEPTH 256
222 static char *topic_array[TOPIC_DEPTH];
223 static int topic_level;
224
get_topic(void)225 static char *get_topic(void)
226 {
227 char *tp_old, *tp = NULL;
228 int i;
229
230 for (i = 0; i < topic_level + 1; i++) {
231 int n;
232
233 tp_old = tp;
234 n = asprintf(&tp, "%s%s", tp ?: "", topic_array[i]);
235 if (n < 0) {
236 pr_info("%s: asprintf() error %s\n", prog);
237 return NULL;
238 }
239 free(tp_old);
240 }
241
242 for (i = 0; i < (int) strlen(tp); i++) {
243 char c = tp[i];
244
245 if (c == '-')
246 tp[i] = ' ';
247 else if (c == '.') {
248 tp[i] = '\0';
249 break;
250 }
251 }
252
253 return tp;
254 }
255
add_topic(int level,char * bname)256 static int add_topic(int level, char *bname)
257 {
258 char *topic;
259
260 level -= 2;
261
262 if (level >= TOPIC_DEPTH)
263 return -EINVAL;
264
265 topic = strdup(bname);
266 if (!topic) {
267 pr_info("%s: strdup() error %s for file %s\n", prog,
268 strerror(errno), bname);
269 return -ENOMEM;
270 }
271
272 free(topic_array[topic_level]);
273 topic_array[topic_level] = topic;
274 topic_level = level;
275 return 0;
276 }
277
278 struct perf_entry_data {
279 FILE *outfp;
280 char *topic;
281 };
282
283 static int close_table;
284
print_events_table_prefix(FILE * fp,const char * tblname)285 static void print_events_table_prefix(FILE *fp, const char *tblname)
286 {
287 fprintf(fp, "struct pmu_event %s[] = {\n", tblname);
288 close_table = 1;
289 }
290
print_events_table_entry(void * data,char * name,char * event,char * desc,char * long_desc,char * pmu,char * unit,char * perpkg,char * metric_expr,char * metric_name)291 static int print_events_table_entry(void *data, char *name, char *event,
292 char *desc, char *long_desc,
293 char *pmu, char *unit, char *perpkg,
294 char *metric_expr,
295 char *metric_name)
296 {
297 struct perf_entry_data *pd = data;
298 FILE *outfp = pd->outfp;
299 char *topic = pd->topic;
300
301 /*
302 * TODO: Remove formatting chars after debugging to reduce
303 * string lengths.
304 */
305 fprintf(outfp, "{\n");
306
307 fprintf(outfp, "\t.name = \"%s\",\n", name);
308 fprintf(outfp, "\t.event = \"%s\",\n", event);
309 fprintf(outfp, "\t.desc = \"%s\",\n", desc);
310 fprintf(outfp, "\t.topic = \"%s\",\n", topic);
311 if (long_desc && long_desc[0])
312 fprintf(outfp, "\t.long_desc = \"%s\",\n", long_desc);
313 if (pmu)
314 fprintf(outfp, "\t.pmu = \"%s\",\n", pmu);
315 if (unit)
316 fprintf(outfp, "\t.unit = \"%s\",\n", unit);
317 if (perpkg)
318 fprintf(outfp, "\t.perpkg = \"%s\",\n", perpkg);
319 if (metric_expr)
320 fprintf(outfp, "\t.metric_expr = \"%s\",\n", metric_expr);
321 if (metric_name)
322 fprintf(outfp, "\t.metric_name = \"%s\",\n", metric_name);
323 fprintf(outfp, "},\n");
324
325 return 0;
326 }
327
print_events_table_suffix(FILE * outfp)328 static void print_events_table_suffix(FILE *outfp)
329 {
330 fprintf(outfp, "{\n");
331
332 fprintf(outfp, "\t.name = 0,\n");
333 fprintf(outfp, "\t.event = 0,\n");
334 fprintf(outfp, "\t.desc = 0,\n");
335
336 fprintf(outfp, "},\n");
337 fprintf(outfp, "};\n");
338 close_table = 0;
339 }
340
341 static struct fixed {
342 const char *name;
343 const char *event;
344 } fixed[] = {
345 { "inst_retired.any", "event=0xc0,period=2000003" },
346 { "inst_retired.any_p", "event=0xc0,period=2000003" },
347 { "cpu_clk_unhalted.ref", "event=0x0,umask=0x03,period=2000003" },
348 { "cpu_clk_unhalted.thread", "event=0x3c,period=2000003" },
349 { "cpu_clk_unhalted.core", "event=0x3c,period=2000003" },
350 { "cpu_clk_unhalted.thread_any", "event=0x3c,any=1,period=2000003" },
351 { NULL, NULL},
352 };
353
354 /*
355 * Handle different fixed counter encodings between JSON and perf.
356 */
real_event(const char * name,char * event)357 static char *real_event(const char *name, char *event)
358 {
359 int i;
360
361 for (i = 0; fixed[i].name; i++)
362 if (!strcasecmp(name, fixed[i].name))
363 return (char *)fixed[i].event;
364 return event;
365 }
366
367 /* Call func with each event in the json file */
json_events(const char * fn,int (* func)(void * data,char * name,char * event,char * desc,char * long_desc,char * pmu,char * unit,char * perpkg,char * metric_expr,char * metric_name),void * data)368 int json_events(const char *fn,
369 int (*func)(void *data, char *name, char *event, char *desc,
370 char *long_desc,
371 char *pmu, char *unit, char *perpkg,
372 char *metric_expr,
373 char *metric_name),
374 void *data)
375 {
376 int err = -EIO;
377 size_t size;
378 jsmntok_t *tokens, *tok;
379 int i, j, len;
380 char *map;
381 char buf[128];
382
383 if (!fn)
384 return -ENOENT;
385
386 tokens = parse_json(fn, &map, &size, &len);
387 if (!tokens)
388 return -EIO;
389 EXPECT(tokens->type == JSMN_ARRAY, tokens, "expected top level array");
390 tok = tokens + 1;
391 for (i = 0; i < tokens->size; i++) {
392 char *event = NULL, *desc = NULL, *name = NULL;
393 char *long_desc = NULL;
394 char *extra_desc = NULL;
395 char *pmu = NULL;
396 char *filter = NULL;
397 char *perpkg = NULL;
398 char *unit = NULL;
399 char *metric_expr = NULL;
400 char *metric_name = NULL;
401 unsigned long long eventcode = 0;
402 struct msrmap *msr = NULL;
403 jsmntok_t *msrval = NULL;
404 jsmntok_t *precise = NULL;
405 jsmntok_t *obj = tok++;
406
407 EXPECT(obj->type == JSMN_OBJECT, obj, "expected object");
408 for (j = 0; j < obj->size; j += 2) {
409 jsmntok_t *field, *val;
410 int nz;
411 char *s;
412
413 field = tok + j;
414 EXPECT(field->type == JSMN_STRING, tok + j,
415 "Expected field name");
416 val = tok + j + 1;
417 EXPECT(val->type == JSMN_STRING, tok + j + 1,
418 "Expected string value");
419
420 nz = !json_streq(map, val, "0");
421 if (match_field(map, field, nz, &event, val)) {
422 /* ok */
423 } else if (json_streq(map, field, "EventCode")) {
424 char *code = NULL;
425 addfield(map, &code, "", "", val);
426 eventcode |= strtoul(code, NULL, 0);
427 free(code);
428 } else if (json_streq(map, field, "ExtSel")) {
429 char *code = NULL;
430 addfield(map, &code, "", "", val);
431 eventcode |= strtoul(code, NULL, 0) << 21;
432 free(code);
433 } else if (json_streq(map, field, "EventName")) {
434 addfield(map, &name, "", "", val);
435 } else if (json_streq(map, field, "BriefDescription")) {
436 addfield(map, &desc, "", "", val);
437 fixdesc(desc);
438 } else if (json_streq(map, field,
439 "PublicDescription")) {
440 addfield(map, &long_desc, "", "", val);
441 fixdesc(long_desc);
442 } else if (json_streq(map, field, "PEBS") && nz) {
443 precise = val;
444 } else if (json_streq(map, field, "MSRIndex") && nz) {
445 msr = lookup_msr(map, val);
446 } else if (json_streq(map, field, "MSRValue")) {
447 msrval = val;
448 } else if (json_streq(map, field, "Errata") &&
449 !json_streq(map, val, "null")) {
450 addfield(map, &extra_desc, ". ",
451 " Spec update: ", val);
452 } else if (json_streq(map, field, "Data_LA") && nz) {
453 addfield(map, &extra_desc, ". ",
454 " Supports address when precise",
455 NULL);
456 } else if (json_streq(map, field, "Unit")) {
457 const char *ppmu;
458
459 ppmu = field_to_perf(unit_to_pmu, map, val);
460 if (ppmu) {
461 pmu = strdup(ppmu);
462 } else {
463 if (!pmu)
464 pmu = strdup("uncore_");
465 addfield(map, &pmu, "", "", val);
466 for (s = pmu; *s; s++)
467 *s = tolower(*s);
468 }
469 addfield(map, &desc, ". ", "Unit: ", NULL);
470 addfield(map, &desc, "", pmu, NULL);
471 addfield(map, &desc, "", " ", NULL);
472 } else if (json_streq(map, field, "Filter")) {
473 addfield(map, &filter, "", "", val);
474 } else if (json_streq(map, field, "ScaleUnit")) {
475 addfield(map, &unit, "", "", val);
476 } else if (json_streq(map, field, "PerPkg")) {
477 addfield(map, &perpkg, "", "", val);
478 } else if (json_streq(map, field, "MetricName")) {
479 addfield(map, &metric_name, "", "", val);
480 } else if (json_streq(map, field, "MetricExpr")) {
481 addfield(map, &metric_expr, "", "", val);
482 for (s = metric_expr; *s; s++)
483 *s = tolower(*s);
484 }
485 /* ignore unknown fields */
486 }
487 if (precise && desc && !strstr(desc, "(Precise Event)")) {
488 if (json_streq(map, precise, "2"))
489 addfield(map, &extra_desc, " ",
490 "(Must be precise)", NULL);
491 else
492 addfield(map, &extra_desc, " ",
493 "(Precise event)", NULL);
494 }
495 snprintf(buf, sizeof buf, "event=%#llx", eventcode);
496 addfield(map, &event, ",", buf, NULL);
497 if (desc && extra_desc)
498 addfield(map, &desc, " ", extra_desc, NULL);
499 if (long_desc && extra_desc)
500 addfield(map, &long_desc, " ", extra_desc, NULL);
501 if (filter)
502 addfield(map, &event, ",", filter, NULL);
503 if (msr != NULL)
504 addfield(map, &event, ",", msr->pname, msrval);
505 fixname(name);
506
507 err = func(data, name, real_event(name, event), desc, long_desc,
508 pmu, unit, perpkg, metric_expr, metric_name);
509 free(event);
510 free(desc);
511 free(name);
512 free(long_desc);
513 free(extra_desc);
514 free(pmu);
515 free(filter);
516 free(perpkg);
517 free(unit);
518 free(metric_expr);
519 free(metric_name);
520 if (err)
521 break;
522 tok += j;
523 }
524 EXPECT(tok - tokens == len, tok, "unexpected objects at end");
525 err = 0;
526 out_free:
527 free_json(map, size, tokens);
528 return err;
529 }
530
file_name_to_table_name(char * fname)531 static char *file_name_to_table_name(char *fname)
532 {
533 unsigned int i;
534 int n;
535 int c;
536 char *tblname;
537
538 /*
539 * Ensure tablename starts with alphabetic character.
540 * Derive rest of table name from basename of the JSON file,
541 * replacing hyphens and stripping out .json suffix.
542 */
543 n = asprintf(&tblname, "pme_%s", basename(fname));
544 if (n < 0) {
545 pr_info("%s: asprintf() error %s for file %s\n", prog,
546 strerror(errno), fname);
547 return NULL;
548 }
549
550 for (i = 0; i < strlen(tblname); i++) {
551 c = tblname[i];
552
553 if (c == '-')
554 tblname[i] = '_';
555 else if (c == '.') {
556 tblname[i] = '\0';
557 break;
558 } else if (!isalnum(c) && c != '_') {
559 pr_err("%s: Invalid character '%c' in file name %s\n",
560 prog, c, basename(fname));
561 free(tblname);
562 tblname = NULL;
563 break;
564 }
565 }
566
567 return tblname;
568 }
569
print_mapping_table_prefix(FILE * outfp)570 static void print_mapping_table_prefix(FILE *outfp)
571 {
572 fprintf(outfp, "struct pmu_events_map pmu_events_map[] = {\n");
573 }
574
print_mapping_table_suffix(FILE * outfp)575 static void print_mapping_table_suffix(FILE *outfp)
576 {
577 /*
578 * Print the terminating, NULL entry.
579 */
580 fprintf(outfp, "{\n");
581 fprintf(outfp, "\t.cpuid = 0,\n");
582 fprintf(outfp, "\t.version = 0,\n");
583 fprintf(outfp, "\t.type = 0,\n");
584 fprintf(outfp, "\t.table = 0,\n");
585 fprintf(outfp, "},\n");
586
587 /* and finally, the closing curly bracket for the struct */
588 fprintf(outfp, "};\n");
589 }
590
process_mapfile(FILE * outfp,char * fpath)591 static int process_mapfile(FILE *outfp, char *fpath)
592 {
593 int n = 16384;
594 FILE *mapfp;
595 char *save = NULL;
596 char *line, *p;
597 int line_num;
598 char *tblname;
599
600 pr_info("%s: Processing mapfile %s\n", prog, fpath);
601
602 line = malloc(n);
603 if (!line)
604 return -1;
605
606 mapfp = fopen(fpath, "r");
607 if (!mapfp) {
608 pr_info("%s: Error %s opening %s\n", prog, strerror(errno),
609 fpath);
610 return -1;
611 }
612
613 print_mapping_table_prefix(outfp);
614
615 /* Skip first line (header) */
616 p = fgets(line, n, mapfp);
617 if (!p)
618 goto out;
619
620 line_num = 1;
621 while (1) {
622 char *cpuid, *version, *type, *fname;
623
624 line_num++;
625 p = fgets(line, n, mapfp);
626 if (!p)
627 break;
628
629 if (line[0] == '#' || line[0] == '\n')
630 continue;
631
632 if (line[strlen(line)-1] != '\n') {
633 /* TODO Deal with lines longer than 16K */
634 pr_info("%s: Mapfile %s: line %d too long, aborting\n",
635 prog, fpath, line_num);
636 return -1;
637 }
638 line[strlen(line)-1] = '\0';
639
640 cpuid = strtok_r(p, ",", &save);
641 version = strtok_r(NULL, ",", &save);
642 fname = strtok_r(NULL, ",", &save);
643 type = strtok_r(NULL, ",", &save);
644
645 tblname = file_name_to_table_name(fname);
646 fprintf(outfp, "{\n");
647 fprintf(outfp, "\t.cpuid = \"%s\",\n", cpuid);
648 fprintf(outfp, "\t.version = \"%s\",\n", version);
649 fprintf(outfp, "\t.type = \"%s\",\n", type);
650
651 /*
652 * CHECK: We can't use the type (eg "core") field in the
653 * table name. For us to do that, we need to somehow tweak
654 * the other caller of file_name_to_table(), process_json()
655 * to determine the type. process_json() file has no way
656 * of knowing these are "core" events unless file name has
657 * core in it. If filename has core in it, we can safely
658 * ignore the type field here also.
659 */
660 fprintf(outfp, "\t.table = %s\n", tblname);
661 fprintf(outfp, "},\n");
662 }
663
664 out:
665 print_mapping_table_suffix(outfp);
666 return 0;
667 }
668
669 /*
670 * If we fail to locate/process JSON and map files, create a NULL mapping
671 * table. This would at least allow perf to build even if we can't find/use
672 * the aliases.
673 */
create_empty_mapping(const char * output_file)674 static void create_empty_mapping(const char *output_file)
675 {
676 FILE *outfp;
677
678 pr_info("%s: Creating empty pmu_events_map[] table\n", prog);
679
680 /* Truncate file to clear any partial writes to it */
681 outfp = fopen(output_file, "w");
682 if (!outfp) {
683 perror("fopen()");
684 _Exit(1);
685 }
686
687 fprintf(outfp, "#include \"../../pmu-events/pmu-events.h\"\n");
688 print_mapping_table_prefix(outfp);
689 print_mapping_table_suffix(outfp);
690 fclose(outfp);
691 }
692
get_maxfds(void)693 static int get_maxfds(void)
694 {
695 struct rlimit rlim;
696
697 if (getrlimit(RLIMIT_NOFILE, &rlim) == 0)
698 return min((int)rlim.rlim_max / 2, 512);
699
700 return 512;
701 }
702
703 /*
704 * nftw() doesn't let us pass an argument to the processing function,
705 * so use a global variables.
706 */
707 static FILE *eventsfp;
708 static char *mapfile;
709
process_one_file(const char * fpath,const struct stat * sb,int typeflag,struct FTW * ftwbuf)710 static int process_one_file(const char *fpath, const struct stat *sb,
711 int typeflag, struct FTW *ftwbuf)
712 {
713 char *tblname, *bname = (char *) fpath + ftwbuf->base;
714 int is_dir = typeflag == FTW_D;
715 int is_file = typeflag == FTW_F;
716 int level = ftwbuf->level;
717 int err = 0;
718
719 pr_debug("%s %d %7jd %-20s %s\n",
720 is_file ? "f" : is_dir ? "d" : "x",
721 level, sb->st_size, bname, fpath);
722
723 /* base dir */
724 if (level == 0)
725 return 0;
726
727 /* model directory, reset topic */
728 if (level == 1 && is_dir) {
729 if (close_table)
730 print_events_table_suffix(eventsfp);
731
732 /*
733 * Drop file name suffix. Replace hyphens with underscores.
734 * Fail if file name contains any alphanum characters besides
735 * underscores.
736 */
737 tblname = file_name_to_table_name(bname);
738 if (!tblname) {
739 pr_info("%s: Error determining table name for %s\n", prog,
740 bname);
741 return -1;
742 }
743
744 print_events_table_prefix(eventsfp, tblname);
745 return 0;
746 }
747
748 /*
749 * Save the mapfile name for now. We will process mapfile
750 * after processing all JSON files (so we can write out the
751 * mapping table after all PMU events tables).
752 *
753 * TODO: Allow for multiple mapfiles? Punt for now.
754 */
755 if (level == 1 && is_file) {
756 if (!strncmp(bname, "mapfile.csv", 11)) {
757 if (mapfile) {
758 pr_info("%s: Many mapfiles? Using %s, ignoring %s\n",
759 prog, mapfile, fpath);
760 } else {
761 mapfile = strdup(fpath);
762 }
763 return 0;
764 }
765
766 pr_info("%s: Ignoring file %s\n", prog, fpath);
767 return 0;
768 }
769
770 /*
771 * If the file name does not have a .json extension,
772 * ignore it. It could be a readme.txt for instance.
773 */
774 if (is_file) {
775 char *suffix = bname + strlen(bname) - 5;
776
777 if (strncmp(suffix, ".json", 5)) {
778 pr_info("%s: Ignoring file without .json suffix %s\n", prog,
779 fpath);
780 return 0;
781 }
782 }
783
784 if (level > 1 && add_topic(level, bname))
785 return -ENOMEM;
786
787 /*
788 * Assume all other files are JSON files.
789 *
790 * If mapfile refers to 'power7_core.json', we create a table
791 * named 'power7_core'. Any inconsistencies between the mapfile
792 * and directory tree could result in build failure due to table
793 * names not being found.
794 *
795 * Atleast for now, be strict with processing JSON file names.
796 * i.e. if JSON file name cannot be mapped to C-style table name,
797 * fail.
798 */
799 if (is_file) {
800 struct perf_entry_data data = {
801 .topic = get_topic(),
802 .outfp = eventsfp,
803 };
804
805 err = json_events(fpath, print_events_table_entry, &data);
806
807 free(data.topic);
808 }
809
810 return err;
811 }
812
813 #ifndef PATH_MAX
814 #define PATH_MAX 4096
815 #endif
816
817 /*
818 * Starting in directory 'start_dirname', find the "mapfile.csv" and
819 * the set of JSON files for the architecture 'arch'.
820 *
821 * From each JSON file, create a C-style "PMU events table" from the
822 * JSON file (see struct pmu_event).
823 *
824 * From the mapfile, create a mapping between the CPU revisions and
825 * PMU event tables (see struct pmu_events_map).
826 *
827 * Write out the PMU events tables and the mapping table to pmu-event.c.
828 */
main(int argc,char * argv[])829 int main(int argc, char *argv[])
830 {
831 int rc;
832 int maxfds;
833 char ldirname[PATH_MAX];
834
835 const char *arch;
836 const char *output_file;
837 const char *start_dirname;
838 struct stat stbuf;
839
840 prog = basename(argv[0]);
841 if (argc < 4) {
842 pr_err("Usage: %s <arch> <starting_dir> <output_file>\n", prog);
843 return 1;
844 }
845
846 arch = argv[1];
847 start_dirname = argv[2];
848 output_file = argv[3];
849
850 if (argc > 4)
851 verbose = atoi(argv[4]);
852
853 eventsfp = fopen(output_file, "w");
854 if (!eventsfp) {
855 pr_err("%s Unable to create required file %s (%s)\n",
856 prog, output_file, strerror(errno));
857 return 2;
858 }
859
860 sprintf(ldirname, "%s/%s", start_dirname, arch);
861
862 /* If architecture does not have any event lists, bail out */
863 if (stat(ldirname, &stbuf) < 0) {
864 pr_info("%s: Arch %s has no PMU event lists\n", prog, arch);
865 goto empty_map;
866 }
867
868 /* Include pmu-events.h first */
869 fprintf(eventsfp, "#include \"../../pmu-events/pmu-events.h\"\n");
870
871 /*
872 * The mapfile allows multiple CPUids to point to the same JSON file,
873 * so, not sure if there is a need for symlinks within the pmu-events
874 * directory.
875 *
876 * For now, treat symlinks of JSON files as regular files and create
877 * separate tables for each symlink (presumably, each symlink refers
878 * to specific version of the CPU).
879 */
880
881 maxfds = get_maxfds();
882 mapfile = NULL;
883 rc = nftw(ldirname, process_one_file, maxfds, 0);
884 if (rc && verbose) {
885 pr_info("%s: Error walking file tree %s\n", prog, ldirname);
886 goto empty_map;
887 } else if (rc < 0) {
888 /* Make build fail */
889 return 1;
890 } else if (rc) {
891 goto empty_map;
892 }
893
894 if (close_table)
895 print_events_table_suffix(eventsfp);
896
897 if (!mapfile) {
898 pr_info("%s: No CPU->JSON mapping?\n", prog);
899 goto empty_map;
900 }
901
902 if (process_mapfile(eventsfp, mapfile)) {
903 pr_info("%s: Error processing mapfile %s\n", prog, mapfile);
904 /* Make build fail */
905 return 1;
906 }
907
908 return 0;
909
910 empty_map:
911 fclose(eventsfp);
912 create_empty_mapping(output_file);
913 return 0;
914 }
915