tools/perf/pmu-events/jevents.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
eprintf
get_cpu_str
addfield
fixname
fixdesc
fixregex
cut_comma
match_field
lookup_msr
field_to_perf
get_topic
add_topic
print_events_table_prefix
print_events_table_entry
free_arch_std_events
save_arch_std_events
print_events_table_suffix
real_event
try_fixup
json_events
file_name_to_table_name
print_mapping_table_prefix
print_mapping_table_suffix
process_mapfile
create_empty_mapping
get_maxfds
is_leaf_dir
is_json_file
preprocess_arch_std_files
process_one_file
main
   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 <limits.h>
  43 #include <dirent.h>
  44 #include <sys/time.h>                   /* getrlimit */
  45 #include <sys/resource.h>               /* getrlimit */
  46 #include <ftw.h>
  47 #include <sys/stat.h>
  48 #include <linux/list.h>
  49 #include "jsmn.h"
  50 #include "json.h"
  51 #include "jevents.h"
  52 
  53 int verbose;
  54 char *prog;
  55 
  56 int eprintf(int level, int var, const char *fmt, ...)
  57 {
  58 
  59         int ret;
  60         va_list args;
  61 
  62         if (var < level)
  63                 return 0;
  64 
  65         va_start(args, fmt);
  66 
  67         ret = vfprintf(stderr, fmt, args);
  68 
  69         va_end(args);
  70 
  71         return ret;
  72 }
  73 
  74 __attribute__((weak)) char *get_cpu_str(void)
  75 {
  76         return NULL;
  77 }
  78 
  79 static void addfield(char *map, char **dst, const char *sep,
  80                      const char *a, jsmntok_t *bt)
  81 {
  82         unsigned int len = strlen(a) + 1 + strlen(sep);
  83         int olen = *dst ? strlen(*dst) : 0;
  84         int blen = bt ? json_len(bt) : 0;
  85         char *out;
  86 
  87         out = realloc(*dst, len + olen + blen);
  88         if (!out) {
  89                 /* Don't add field in this case */
  90                 return;
  91         }
  92         *dst = out;
  93 
  94         if (!olen)
  95                 *(*dst) = 0;
  96         else
  97                 strcat(*dst, sep);
  98         strcat(*dst, a);
  99         if (bt)
 100                 strncat(*dst, map + bt->start, blen);
 101 }
 102 
 103 static void fixname(char *s)
 104 {
 105         for (; *s; s++)
 106                 *s = tolower(*s);
 107 }
 108 
 109 static void fixdesc(char *s)
 110 {
 111         char *e = s + strlen(s);
 112 
 113         /* Remove trailing dots that look ugly in perf list */
 114         --e;
 115         while (e >= s && isspace(*e))
 116                 --e;
 117         if (*e == '.')
 118                 *e = 0;
 119 }
 120 
 121 /* Add escapes for '\' so they are proper C strings. */
 122 static char *fixregex(char *s)
 123 {
 124         int len = 0;
 125         int esc_count = 0;
 126         char *fixed = NULL;
 127         char *p, *q;
 128 
 129         /* Count the number of '\' in string */
 130         for (p = s; *p; p++) {
 131                 ++len;
 132                 if (*p == '\\')
 133                         ++esc_count;
 134         }
 135 
 136         if (esc_count == 0)
 137                 return s;
 138 
 139         /* allocate space for a new string */
 140         fixed = (char *) malloc(len + 1);
 141         if (!fixed)
 142                 return NULL;
 143 
 144         /* copy over the characters */
 145         q = fixed;
 146         for (p = s; *p; p++) {
 147                 if (*p == '\\') {
 148                         *q = '\\';
 149                         ++q;
 150                 }
 151                 *q = *p;
 152                 ++q;
 153         }
 154         *q = '\0';
 155         return fixed;
 156 }
 157 
 158 static struct msrmap {
 159         const char *num;
 160         const char *pname;
 161 } msrmap[] = {
 162         { "0x3F6", "ldlat=" },
 163         { "0x1A6", "offcore_rsp=" },
 164         { "0x1A7", "offcore_rsp=" },
 165         { "0x3F7", "frontend=" },
 166         { NULL, NULL }
 167 };
 168 
 169 static struct field {
 170         const char *field;
 171         const char *kernel;
 172 } fields[] = {
 173         { "UMask",      "umask=" },
 174         { "CounterMask", "cmask=" },
 175         { "Invert",     "inv=" },
 176         { "AnyThread",  "any=" },
 177         { "EdgeDetect", "edge=" },
 178         { "SampleAfterValue", "period=" },
 179         { "FCMask",     "fc_mask=" },
 180         { "PortMask",   "ch_mask=" },
 181         { NULL, NULL }
 182 };
 183 
 184 static void cut_comma(char *map, jsmntok_t *newval)
 185 {
 186         int i;
 187 
 188         /* Cut off everything after comma */
 189         for (i = newval->start; i < newval->end; i++) {
 190                 if (map[i] == ',')
 191                         newval->end = i;
 192         }
 193 }
 194 
 195 static int match_field(char *map, jsmntok_t *field, int nz,
 196                        char **event, jsmntok_t *val)
 197 {
 198         struct field *f;
 199         jsmntok_t newval = *val;
 200 
 201         for (f = fields; f->field; f++)
 202                 if (json_streq(map, field, f->field) && nz) {
 203                         cut_comma(map, &newval);
 204                         addfield(map, event, ",", f->kernel, &newval);
 205                         return 1;
 206                 }
 207         return 0;
 208 }
 209 
 210 static struct msrmap *lookup_msr(char *map, jsmntok_t *val)
 211 {
 212         jsmntok_t newval = *val;
 213         static bool warned;
 214         int i;
 215 
 216         cut_comma(map, &newval);
 217         for (i = 0; msrmap[i].num; i++)
 218                 if (json_streq(map, &newval, msrmap[i].num))
 219                         return &msrmap[i];
 220         if (!warned) {
 221                 warned = true;
 222                 pr_err("%s: Unknown MSR in event file %.*s\n", prog,
 223                         json_len(val), map + val->start);
 224         }
 225         return NULL;
 226 }
 227 
 228 static struct map {
 229         const char *json;
 230         const char *perf;
 231 } unit_to_pmu[] = {
 232         { "CBO", "uncore_cbox" },
 233         { "QPI LL", "uncore_qpi" },
 234         { "SBO", "uncore_sbox" },
 235         { "iMPH-U", "uncore_arb" },
 236         { "CPU-M-CF", "cpum_cf" },
 237         { "CPU-M-SF", "cpum_sf" },
 238         { "UPI LL", "uncore_upi" },
 239         { "hisi_sccl,ddrc", "hisi_sccl,ddrc" },
 240         { "hisi_sccl,hha", "hisi_sccl,hha" },
 241         { "hisi_sccl,l3c", "hisi_sccl,l3c" },
 242         { "L3PMC", "amd_l3" },
 243         {}
 244 };
 245 
 246 static const char *field_to_perf(struct map *table, char *map, jsmntok_t *val)
 247 {
 248         int i;
 249 
 250         for (i = 0; table[i].json; i++) {
 251                 if (json_streq(map, val, table[i].json))
 252                         return table[i].perf;
 253         }
 254         return NULL;
 255 }
 256 
 257 #define EXPECT(e, t, m) do { if (!(e)) {                        \
 258         jsmntok_t *loc = (t);                                   \
 259         if (!(t)->start && (t) > tokens)                        \
 260                 loc = (t) - 1;                                  \
 261         pr_err("%s:%d: " m ", got %s\n", fn,                    \
 262                json_line(map, loc),                             \
 263                json_name(t));                                   \
 264         err = -EIO;                                             \
 265         goto out_free;                                          \
 266 } } while (0)
 267 
 268 static char *topic;
 269 
 270 static char *get_topic(void)
 271 {
 272         char *tp;
 273         int i;
 274 
 275         /* tp is free'd in process_one_file() */
 276         i = asprintf(&tp, "%s", topic);
 277         if (i < 0) {
 278                 pr_info("%s: asprintf() error %s\n", prog);
 279                 return NULL;
 280         }
 281 
 282         for (i = 0; i < (int) strlen(tp); i++) {
 283                 char c = tp[i];
 284 
 285                 if (c == '-')
 286                         tp[i] = ' ';
 287                 else if (c == '.') {
 288                         tp[i] = '\0';
 289                         break;
 290                 }
 291         }
 292 
 293         return tp;
 294 }
 295 
 296 static int add_topic(char *bname)
 297 {
 298         free(topic);
 299         topic = strdup(bname);
 300         if (!topic) {
 301                 pr_info("%s: strdup() error %s for file %s\n", prog,
 302                                 strerror(errno), bname);
 303                 return -ENOMEM;
 304         }
 305         return 0;
 306 }
 307 
 308 struct perf_entry_data {
 309         FILE *outfp;
 310         char *topic;
 311 };
 312 
 313 static int close_table;
 314 
 315 static void print_events_table_prefix(FILE *fp, const char *tblname)
 316 {
 317         fprintf(fp, "struct pmu_event %s[] = {\n", tblname);
 318         close_table = 1;
 319 }
 320 
 321 static int print_events_table_entry(void *data, char *name, char *event,
 322                                     char *desc, char *long_desc,
 323                                     char *pmu, char *unit, char *perpkg,
 324                                     char *metric_expr,
 325                                     char *metric_name, char *metric_group)
 326 {
 327         struct perf_entry_data *pd = data;
 328         FILE *outfp = pd->outfp;
 329         char *topic = pd->topic;
 330 
 331         /*
 332          * TODO: Remove formatting chars after debugging to reduce
 333          *       string lengths.
 334          */
 335         fprintf(outfp, "{\n");
 336 
 337         if (name)
 338                 fprintf(outfp, "\t.name = \"%s\",\n", name);
 339         if (event)
 340                 fprintf(outfp, "\t.event = \"%s\",\n", event);
 341         fprintf(outfp, "\t.desc = \"%s\",\n", desc);
 342         fprintf(outfp, "\t.topic = \"%s\",\n", topic);
 343         if (long_desc && long_desc[0])
 344                 fprintf(outfp, "\t.long_desc = \"%s\",\n", long_desc);
 345         if (pmu)
 346                 fprintf(outfp, "\t.pmu = \"%s\",\n", pmu);
 347         if (unit)
 348                 fprintf(outfp, "\t.unit = \"%s\",\n", unit);
 349         if (perpkg)
 350                 fprintf(outfp, "\t.perpkg = \"%s\",\n", perpkg);
 351         if (metric_expr)
 352                 fprintf(outfp, "\t.metric_expr = \"%s\",\n", metric_expr);
 353         if (metric_name)
 354                 fprintf(outfp, "\t.metric_name = \"%s\",\n", metric_name);
 355         if (metric_group)
 356                 fprintf(outfp, "\t.metric_group = \"%s\",\n", metric_group);
 357         fprintf(outfp, "},\n");
 358 
 359         return 0;
 360 }
 361 
 362 struct event_struct {
 363         struct list_head list;
 364         char *name;
 365         char *event;
 366         char *desc;
 367         char *long_desc;
 368         char *pmu;
 369         char *unit;
 370         char *perpkg;
 371         char *metric_expr;
 372         char *metric_name;
 373         char *metric_group;
 374 };
 375 
 376 #define ADD_EVENT_FIELD(field) do { if (field) {                \
 377         es->field = strdup(field);                              \
 378         if (!es->field)                                         \
 379                 goto out_free;                                  \
 380 } } while (0)
 381 
 382 #define FREE_EVENT_FIELD(field) free(es->field)
 383 
 384 #define TRY_FIXUP_FIELD(field) do { if (es->field && !*field) {\
 385         *field = strdup(es->field);                             \
 386         if (!*field)                                            \
 387                 return -ENOMEM;                                 \
 388 } } while (0)
 389 
 390 #define FOR_ALL_EVENT_STRUCT_FIELDS(op) do {                    \
 391         op(name);                                               \
 392         op(event);                                              \
 393         op(desc);                                               \
 394         op(long_desc);                                          \
 395         op(pmu);                                                \
 396         op(unit);                                               \
 397         op(perpkg);                                             \
 398         op(metric_expr);                                        \
 399         op(metric_name);                                        \
 400         op(metric_group);                                       \
 401 } while (0)
 402 
 403 static LIST_HEAD(arch_std_events);
 404 
 405 static void free_arch_std_events(void)
 406 {
 407         struct event_struct *es, *next;
 408 
 409         list_for_each_entry_safe(es, next, &arch_std_events, list) {
 410                 FOR_ALL_EVENT_STRUCT_FIELDS(FREE_EVENT_FIELD);
 411                 list_del_init(&es->list);
 412                 free(es);
 413         }
 414 }
 415 
 416 static int save_arch_std_events(void *data, char *name, char *event,
 417                                 char *desc, char *long_desc, char *pmu,
 418                                 char *unit, char *perpkg, char *metric_expr,
 419                                 char *metric_name, char *metric_group)
 420 {
 421         struct event_struct *es;
 422 
 423         es = malloc(sizeof(*es));
 424         if (!es)
 425                 return -ENOMEM;
 426         memset(es, 0, sizeof(*es));
 427         FOR_ALL_EVENT_STRUCT_FIELDS(ADD_EVENT_FIELD);
 428         list_add_tail(&es->list, &arch_std_events);
 429         return 0;
 430 out_free:
 431         FOR_ALL_EVENT_STRUCT_FIELDS(FREE_EVENT_FIELD);
 432         free(es);
 433         return -ENOMEM;
 434 }
 435 
 436 static void print_events_table_suffix(FILE *outfp)
 437 {
 438         fprintf(outfp, "{\n");
 439 
 440         fprintf(outfp, "\t.name = 0,\n");
 441         fprintf(outfp, "\t.event = 0,\n");
 442         fprintf(outfp, "\t.desc = 0,\n");
 443 
 444         fprintf(outfp, "},\n");
 445         fprintf(outfp, "};\n");
 446         close_table = 0;
 447 }
 448 
 449 static struct fixed {
 450         const char *name;
 451         const char *event;
 452 } fixed[] = {
 453         { "inst_retired.any", "event=0xc0,period=2000003" },
 454         { "inst_retired.any_p", "event=0xc0,period=2000003" },
 455         { "cpu_clk_unhalted.ref", "event=0x0,umask=0x03,period=2000003" },
 456         { "cpu_clk_unhalted.thread", "event=0x3c,period=2000003" },
 457         { "cpu_clk_unhalted.core", "event=0x3c,period=2000003" },
 458         { "cpu_clk_unhalted.thread_any", "event=0x3c,any=1,period=2000003" },
 459         { NULL, NULL},
 460 };
 461 
 462 /*
 463  * Handle different fixed counter encodings between JSON and perf.
 464  */
 465 static char *real_event(const char *name, char *event)
 466 {
 467         int i;
 468 
 469         if (!name)
 470                 return NULL;
 471 
 472         for (i = 0; fixed[i].name; i++)
 473                 if (!strcasecmp(name, fixed[i].name))
 474                         return (char *)fixed[i].event;
 475         return event;
 476 }
 477 
 478 static int
 479 try_fixup(const char *fn, char *arch_std, char **event, char **desc,
 480           char **name, char **long_desc, char **pmu, char **filter,
 481           char **perpkg, char **unit, char **metric_expr, char **metric_name,
 482           char **metric_group, unsigned long long eventcode)
 483 {
 484         /* try to find matching event from arch standard values */
 485         struct event_struct *es;
 486 
 487         list_for_each_entry(es, &arch_std_events, list) {
 488                 if (!strcmp(arch_std, es->name)) {
 489                         if (!eventcode && es->event) {
 490                                 /* allow EventCode to be overridden */
 491                                 free(*event);
 492                                 *event = NULL;
 493                         }
 494                         FOR_ALL_EVENT_STRUCT_FIELDS(TRY_FIXUP_FIELD);
 495                         return 0;
 496                 }
 497         }
 498 
 499         pr_err("%s: could not find matching %s for %s\n",
 500                                         prog, arch_std, fn);
 501         return -1;
 502 }
 503 
 504 /* Call func with each event in the json file */
 505 int json_events(const char *fn,
 506           int (*func)(void *data, char *name, char *event, char *desc,
 507                       char *long_desc,
 508                       char *pmu, char *unit, char *perpkg,
 509                       char *metric_expr,
 510                       char *metric_name, char *metric_group),
 511           void *data)
 512 {
 513         int err;
 514         size_t size;
 515         jsmntok_t *tokens, *tok;
 516         int i, j, len;
 517         char *map;
 518         char buf[128];
 519 
 520         if (!fn)
 521                 return -ENOENT;
 522 
 523         tokens = parse_json(fn, &map, &size, &len);
 524         if (!tokens)
 525                 return -EIO;
 526         EXPECT(tokens->type == JSMN_ARRAY, tokens, "expected top level array");
 527         tok = tokens + 1;
 528         for (i = 0; i < tokens->size; i++) {
 529                 char *event = NULL, *desc = NULL, *name = NULL;
 530                 char *long_desc = NULL;
 531                 char *extra_desc = NULL;
 532                 char *pmu = NULL;
 533                 char *filter = NULL;
 534                 char *perpkg = NULL;
 535                 char *unit = NULL;
 536                 char *metric_expr = NULL;
 537                 char *metric_name = NULL;
 538                 char *metric_group = NULL;
 539                 char *arch_std = NULL;
 540                 unsigned long long eventcode = 0;
 541                 struct msrmap *msr = NULL;
 542                 jsmntok_t *msrval = NULL;
 543                 jsmntok_t *precise = NULL;
 544                 jsmntok_t *obj = tok++;
 545 
 546                 EXPECT(obj->type == JSMN_OBJECT, obj, "expected object");
 547                 for (j = 0; j < obj->size; j += 2) {
 548                         jsmntok_t *field, *val;
 549                         int nz;
 550                         char *s;
 551 
 552                         field = tok + j;
 553                         EXPECT(field->type == JSMN_STRING, tok + j,
 554                                "Expected field name");
 555                         val = tok + j + 1;
 556                         EXPECT(val->type == JSMN_STRING, tok + j + 1,
 557                                "Expected string value");
 558 
 559                         nz = !json_streq(map, val, "0");
 560                         if (match_field(map, field, nz, &event, val)) {
 561                                 /* ok */
 562                         } else if (json_streq(map, field, "EventCode")) {
 563                                 char *code = NULL;
 564                                 addfield(map, &code, "", "", val);
 565                                 eventcode |= strtoul(code, NULL, 0);
 566                                 free(code);
 567                         } else if (json_streq(map, field, "ExtSel")) {
 568                                 char *code = NULL;
 569                                 addfield(map, &code, "", "", val);
 570                                 eventcode |= strtoul(code, NULL, 0) << 21;
 571                                 free(code);
 572                         } else if (json_streq(map, field, "EventName")) {
 573                                 addfield(map, &name, "", "", val);
 574                         } else if (json_streq(map, field, "BriefDescription")) {
 575                                 addfield(map, &desc, "", "", val);
 576                                 fixdesc(desc);
 577                         } else if (json_streq(map, field,
 578                                              "PublicDescription")) {
 579                                 addfield(map, &long_desc, "", "", val);
 580                                 fixdesc(long_desc);
 581                         } else if (json_streq(map, field, "PEBS") && nz) {
 582                                 precise = val;
 583                         } else if (json_streq(map, field, "MSRIndex") && nz) {
 584                                 msr = lookup_msr(map, val);
 585                         } else if (json_streq(map, field, "MSRValue")) {
 586                                 msrval = val;
 587                         } else if (json_streq(map, field, "Errata") &&
 588                                    !json_streq(map, val, "null")) {
 589                                 addfield(map, &extra_desc, ". ",
 590                                         " Spec update: ", val);
 591                         } else if (json_streq(map, field, "Data_LA") && nz) {
 592                                 addfield(map, &extra_desc, ". ",
 593                                         " Supports address when precise",
 594                                         NULL);
 595                         } else if (json_streq(map, field, "Unit")) {
 596                                 const char *ppmu;
 597 
 598                                 ppmu = field_to_perf(unit_to_pmu, map, val);
 599                                 if (ppmu) {
 600                                         pmu = strdup(ppmu);
 601                                 } else {
 602                                         if (!pmu)
 603                                                 pmu = strdup("uncore_");
 604                                         addfield(map, &pmu, "", "", val);
 605                                         for (s = pmu; *s; s++)
 606                                                 *s = tolower(*s);
 607                                 }
 608                                 addfield(map, &desc, ". ", "Unit: ", NULL);
 609                                 addfield(map, &desc, "", pmu, NULL);
 610                                 addfield(map, &desc, "", " ", NULL);
 611                         } else if (json_streq(map, field, "Filter")) {
 612                                 addfield(map, &filter, "", "", val);
 613                         } else if (json_streq(map, field, "ScaleUnit")) {
 614                                 addfield(map, &unit, "", "", val);
 615                         } else if (json_streq(map, field, "PerPkg")) {
 616                                 addfield(map, &perpkg, "", "", val);
 617                         } else if (json_streq(map, field, "MetricName")) {
 618                                 addfield(map, &metric_name, "", "", val);
 619                         } else if (json_streq(map, field, "MetricGroup")) {
 620                                 addfield(map, &metric_group, "", "", val);
 621                         } else if (json_streq(map, field, "MetricExpr")) {
 622                                 addfield(map, &metric_expr, "", "", val);
 623                                 for (s = metric_expr; *s; s++)
 624                                         *s = tolower(*s);
 625                         } else if (json_streq(map, field, "ArchStdEvent")) {
 626                                 addfield(map, &arch_std, "", "", val);
 627                                 for (s = arch_std; *s; s++)
 628                                         *s = tolower(*s);
 629                         }
 630                         /* ignore unknown fields */
 631                 }
 632                 if (precise && desc && !strstr(desc, "(Precise Event)")) {
 633                         if (json_streq(map, precise, "2"))
 634                                 addfield(map, &extra_desc, " ",
 635                                                 "(Must be precise)", NULL);
 636                         else
 637                                 addfield(map, &extra_desc, " ",
 638                                                 "(Precise event)", NULL);
 639                 }
 640                 snprintf(buf, sizeof buf, "event=%#llx", eventcode);
 641                 addfield(map, &event, ",", buf, NULL);
 642                 if (desc && extra_desc)
 643                         addfield(map, &desc, " ", extra_desc, NULL);
 644                 if (long_desc && extra_desc)
 645                         addfield(map, &long_desc, " ", extra_desc, NULL);
 646                 if (filter)
 647                         addfield(map, &event, ",", filter, NULL);
 648                 if (msr != NULL)
 649                         addfield(map, &event, ",", msr->pname, msrval);
 650                 if (name)
 651                         fixname(name);
 652 
 653                 if (arch_std) {
 654                         /*
 655                          * An arch standard event is referenced, so try to
 656                          * fixup any unassigned values.
 657                          */
 658                         err = try_fixup(fn, arch_std, &event, &desc, &name,
 659                                         &long_desc, &pmu, &filter, &perpkg,
 660                                         &unit, &metric_expr, &metric_name,
 661                                         &metric_group, eventcode);
 662                         if (err)
 663                                 goto free_strings;
 664                 }
 665                 err = func(data, name, real_event(name, event), desc, long_desc,
 666                            pmu, unit, perpkg, metric_expr, metric_name, metric_group);
 667 free_strings:
 668                 free(event);
 669                 free(desc);
 670                 free(name);
 671                 free(long_desc);
 672                 free(extra_desc);
 673                 free(pmu);
 674                 free(filter);
 675                 free(perpkg);
 676                 free(unit);
 677                 free(metric_expr);
 678                 free(metric_name);
 679                 free(metric_group);
 680                 free(arch_std);
 681 
 682                 if (err)
 683                         break;
 684                 tok += j;
 685         }
 686         EXPECT(tok - tokens == len, tok, "unexpected objects at end");
 687         err = 0;
 688 out_free:
 689         free_json(map, size, tokens);
 690         return err;
 691 }
 692 
 693 static char *file_name_to_table_name(char *fname)
 694 {
 695         unsigned int i;
 696         int n;
 697         int c;
 698         char *tblname;
 699 
 700         /*
 701          * Ensure tablename starts with alphabetic character.
 702          * Derive rest of table name from basename of the JSON file,
 703          * replacing hyphens and stripping out .json suffix.
 704          */
 705         n = asprintf(&tblname, "pme_%s", fname);
 706         if (n < 0) {
 707                 pr_info("%s: asprintf() error %s for file %s\n", prog,
 708                                 strerror(errno), fname);
 709                 return NULL;
 710         }
 711 
 712         for (i = 0; i < strlen(tblname); i++) {
 713                 c = tblname[i];
 714 
 715                 if (c == '-' || c == '/')
 716                         tblname[i] = '_';
 717                 else if (c == '.') {
 718                         tblname[i] = '\0';
 719                         break;
 720                 } else if (!isalnum(c) && c != '_') {
 721                         pr_err("%s: Invalid character '%c' in file name %s\n",
 722                                         prog, c, basename(fname));
 723                         free(tblname);
 724                         tblname = NULL;
 725                         break;
 726                 }
 727         }
 728 
 729         return tblname;
 730 }
 731 
 732 static void print_mapping_table_prefix(FILE *outfp)
 733 {
 734         fprintf(outfp, "struct pmu_events_map pmu_events_map[] = {\n");
 735 }
 736 
 737 static void print_mapping_table_suffix(FILE *outfp)
 738 {
 739         /*
 740          * Print the terminating, NULL entry.
 741          */
 742         fprintf(outfp, "{\n");
 743         fprintf(outfp, "\t.cpuid = 0,\n");
 744         fprintf(outfp, "\t.version = 0,\n");
 745         fprintf(outfp, "\t.type = 0,\n");
 746         fprintf(outfp, "\t.table = 0,\n");
 747         fprintf(outfp, "},\n");
 748 
 749         /* and finally, the closing curly bracket for the struct */
 750         fprintf(outfp, "};\n");
 751 }
 752 
 753 static int process_mapfile(FILE *outfp, char *fpath)
 754 {
 755         int n = 16384;
 756         FILE *mapfp;
 757         char *save = NULL;
 758         char *line, *p;
 759         int line_num;
 760         char *tblname;
 761         int ret = 0;
 762 
 763         pr_info("%s: Processing mapfile %s\n", prog, fpath);
 764 
 765         line = malloc(n);
 766         if (!line)
 767                 return -1;
 768 
 769         mapfp = fopen(fpath, "r");
 770         if (!mapfp) {
 771                 pr_info("%s: Error %s opening %s\n", prog, strerror(errno),
 772                                 fpath);
 773                 free(line);
 774                 return -1;
 775         }
 776 
 777         print_mapping_table_prefix(outfp);
 778 
 779         /* Skip first line (header) */
 780         p = fgets(line, n, mapfp);
 781         if (!p)
 782                 goto out;
 783 
 784         line_num = 1;
 785         while (1) {
 786                 char *cpuid, *version, *type, *fname;
 787 
 788                 line_num++;
 789                 p = fgets(line, n, mapfp);
 790                 if (!p)
 791                         break;
 792 
 793                 if (line[0] == '#' || line[0] == '\n')
 794                         continue;
 795 
 796                 if (line[strlen(line)-1] != '\n') {
 797                         /* TODO Deal with lines longer than 16K */
 798                         pr_info("%s: Mapfile %s: line %d too long, aborting\n",
 799                                         prog, fpath, line_num);
 800                         ret = -1;
 801                         goto out;
 802                 }
 803                 line[strlen(line)-1] = '\0';
 804 
 805                 cpuid = fixregex(strtok_r(p, ",", &save));
 806                 version = strtok_r(NULL, ",", &save);
 807                 fname = strtok_r(NULL, ",", &save);
 808                 type = strtok_r(NULL, ",", &save);
 809 
 810                 tblname = file_name_to_table_name(fname);
 811                 fprintf(outfp, "{\n");
 812                 fprintf(outfp, "\t.cpuid = \"%s\",\n", cpuid);
 813                 fprintf(outfp, "\t.version = \"%s\",\n", version);
 814                 fprintf(outfp, "\t.type = \"%s\",\n", type);
 815 
 816                 /*
 817                  * CHECK: We can't use the type (eg "core") field in the
 818                  * table name. For us to do that, we need to somehow tweak
 819                  * the other caller of file_name_to_table(), process_json()
 820                  * to determine the type. process_json() file has no way
 821                  * of knowing these are "core" events unless file name has
 822                  * core in it. If filename has core in it, we can safely
 823                  * ignore the type field here also.
 824                  */
 825                 fprintf(outfp, "\t.table = %s\n", tblname);
 826                 fprintf(outfp, "},\n");
 827         }
 828 
 829 out:
 830         print_mapping_table_suffix(outfp);
 831         fclose(mapfp);
 832         free(line);
 833         return ret;
 834 }
 835 
 836 /*
 837  * If we fail to locate/process JSON and map files, create a NULL mapping
 838  * table. This would at least allow perf to build even if we can't find/use
 839  * the aliases.
 840  */
 841 static void create_empty_mapping(const char *output_file)
 842 {
 843         FILE *outfp;
 844 
 845         pr_info("%s: Creating empty pmu_events_map[] table\n", prog);
 846 
 847         /* Truncate file to clear any partial writes to it */
 848         outfp = fopen(output_file, "w");
 849         if (!outfp) {
 850                 perror("fopen()");
 851                 _Exit(1);
 852         }
 853 
 854         fprintf(outfp, "#include \"pmu-events/pmu-events.h\"\n");
 855         print_mapping_table_prefix(outfp);
 856         print_mapping_table_suffix(outfp);
 857         fclose(outfp);
 858 }
 859 
 860 static int get_maxfds(void)
 861 {
 862         struct rlimit rlim;
 863 
 864         if (getrlimit(RLIMIT_NOFILE, &rlim) == 0)
 865                 return min((int)rlim.rlim_max / 2, 512);
 866 
 867         return 512;
 868 }
 869 
 870 /*
 871  * nftw() doesn't let us pass an argument to the processing function,
 872  * so use a global variables.
 873  */
 874 static FILE *eventsfp;
 875 static char *mapfile;
 876 
 877 static int is_leaf_dir(const char *fpath)
 878 {
 879         DIR *d;
 880         struct dirent *dir;
 881         int res = 1;
 882 
 883         d = opendir(fpath);
 884         if (!d)
 885                 return 0;
 886 
 887         while ((dir = readdir(d)) != NULL) {
 888                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 889                         continue;
 890 
 891                 if (dir->d_type == DT_DIR) {
 892                         res = 0;
 893                         break;
 894                 } else if (dir->d_type == DT_UNKNOWN) {
 895                         char path[PATH_MAX];
 896                         struct stat st;
 897 
 898                         sprintf(path, "%s/%s", fpath, dir->d_name);
 899                         if (stat(path, &st))
 900                                 break;
 901 
 902                         if (S_ISDIR(st.st_mode)) {
 903                                 res = 0;
 904                                 break;
 905                         }
 906                 }
 907         }
 908 
 909         closedir(d);
 910 
 911         return res;
 912 }
 913 
 914 static int is_json_file(const char *name)
 915 {
 916         const char *suffix;
 917 
 918         if (strlen(name) < 5)
 919                 return 0;
 920 
 921         suffix = name + strlen(name) - 5;
 922 
 923         if (strncmp(suffix, ".json", 5) == 0)
 924                 return 1;
 925         return 0;
 926 }
 927 
 928 static int preprocess_arch_std_files(const char *fpath, const struct stat *sb,
 929                                 int typeflag, struct FTW *ftwbuf)
 930 {
 931         int level = ftwbuf->level;
 932         int is_file = typeflag == FTW_F;
 933 
 934         if (level == 1 && is_file && is_json_file(fpath))
 935                 return json_events(fpath, save_arch_std_events, (void *)sb);
 936 
 937         return 0;
 938 }
 939 
 940 static int process_one_file(const char *fpath, const struct stat *sb,
 941                             int typeflag, struct FTW *ftwbuf)
 942 {
 943         char *tblname, *bname;
 944         int is_dir  = typeflag == FTW_D;
 945         int is_file = typeflag == FTW_F;
 946         int level   = ftwbuf->level;
 947         int err = 0;
 948 
 949         if (level == 2 && is_dir) {
 950                 /*
 951                  * For level 2 directory, bname will include parent name,
 952                  * like vendor/platform. So search back from platform dir
 953                  * to find this.
 954                  */
 955                 bname = (char *) fpath + ftwbuf->base - 2;
 956                 for (;;) {
 957                         if (*bname == '/')
 958                                 break;
 959                         bname--;
 960                 }
 961                 bname++;
 962         } else
 963                 bname = (char *) fpath + ftwbuf->base;
 964 
 965         pr_debug("%s %d %7jd %-20s %s\n",
 966                  is_file ? "f" : is_dir ? "d" : "x",
 967                  level, sb->st_size, bname, fpath);
 968 
 969         /* base dir or too deep */
 970         if (level == 0 || level > 3)
 971                 return 0;
 972 
 973 
 974         /* model directory, reset topic */
 975         if ((level == 1 && is_dir && is_leaf_dir(fpath)) ||
 976             (level == 2 && is_dir)) {
 977                 if (close_table)
 978                         print_events_table_suffix(eventsfp);
 979 
 980                 /*
 981                  * Drop file name suffix. Replace hyphens with underscores.
 982                  * Fail if file name contains any alphanum characters besides
 983                  * underscores.
 984                  */
 985                 tblname = file_name_to_table_name(bname);
 986                 if (!tblname) {
 987                         pr_info("%s: Error determining table name for %s\n", prog,
 988                                 bname);
 989                         return -1;
 990                 }
 991 
 992                 print_events_table_prefix(eventsfp, tblname);
 993                 return 0;
 994         }
 995 
 996         /*
 997          * Save the mapfile name for now. We will process mapfile
 998          * after processing all JSON files (so we can write out the
 999          * mapping table after all PMU events tables).
1000          *
1001          */
1002         if (level == 1 && is_file) {
1003                 if (!strcmp(bname, "mapfile.csv")) {
1004                         mapfile = strdup(fpath);
1005                         return 0;
1006                 }
1007 
1008                 pr_info("%s: Ignoring file %s\n", prog, fpath);
1009                 return 0;
1010         }
1011 
1012         /*
1013          * If the file name does not have a .json extension,
1014          * ignore it. It could be a readme.txt for instance.
1015          */
1016         if (is_file) {
1017                 if (!is_json_file(bname)) {
1018                         pr_info("%s: Ignoring file without .json suffix %s\n", prog,
1019                                 fpath);
1020                         return 0;
1021                 }
1022         }
1023 
1024         if (level > 1 && add_topic(bname))
1025                 return -ENOMEM;
1026 
1027         /*
1028          * Assume all other files are JSON files.
1029          *
1030          * If mapfile refers to 'power7_core.json', we create a table
1031          * named 'power7_core'. Any inconsistencies between the mapfile
1032          * and directory tree could result in build failure due to table
1033          * names not being found.
1034          *
1035          * Atleast for now, be strict with processing JSON file names.
1036          * i.e. if JSON file name cannot be mapped to C-style table name,
1037          * fail.
1038          */
1039         if (is_file) {
1040                 struct perf_entry_data data = {
1041                         .topic = get_topic(),
1042                         .outfp = eventsfp,
1043                 };
1044 
1045                 err = json_events(fpath, print_events_table_entry, &data);
1046 
1047                 free(data.topic);
1048         }
1049 
1050         return err;
1051 }
1052 
1053 #ifndef PATH_MAX
1054 #define PATH_MAX        4096
1055 #endif
1056 
1057 /*
1058  * Starting in directory 'start_dirname', find the "mapfile.csv" and
1059  * the set of JSON files for the architecture 'arch'.
1060  *
1061  * From each JSON file, create a C-style "PMU events table" from the
1062  * JSON file (see struct pmu_event).
1063  *
1064  * From the mapfile, create a mapping between the CPU revisions and
1065  * PMU event tables (see struct pmu_events_map).
1066  *
1067  * Write out the PMU events tables and the mapping table to pmu-event.c.
1068  */
1069 int main(int argc, char *argv[])
1070 {
1071         int rc;
1072         int maxfds;
1073         char ldirname[PATH_MAX];
1074 
1075         const char *arch;
1076         const char *output_file;
1077         const char *start_dirname;
1078         struct stat stbuf;
1079 
1080         prog = basename(argv[0]);
1081         if (argc < 4) {
1082                 pr_err("Usage: %s <arch> <starting_dir> <output_file>\n", prog);
1083                 return 1;
1084         }
1085 
1086         arch = argv[1];
1087         start_dirname = argv[2];
1088         output_file = argv[3];
1089 
1090         if (argc > 4)
1091                 verbose = atoi(argv[4]);
1092 
1093         eventsfp = fopen(output_file, "w");
1094         if (!eventsfp) {
1095                 pr_err("%s Unable to create required file %s (%s)\n",
1096                                 prog, output_file, strerror(errno));
1097                 return 2;
1098         }
1099 
1100         sprintf(ldirname, "%s/%s", start_dirname, arch);
1101 
1102         /* If architecture does not have any event lists, bail out */
1103         if (stat(ldirname, &stbuf) < 0) {
1104                 pr_info("%s: Arch %s has no PMU event lists\n", prog, arch);
1105                 goto empty_map;
1106         }
1107 
1108         /* Include pmu-events.h first */
1109         fprintf(eventsfp, "#include \"pmu-events/pmu-events.h\"\n");
1110 
1111         /*
1112          * The mapfile allows multiple CPUids to point to the same JSON file,
1113          * so, not sure if there is a need for symlinks within the pmu-events
1114          * directory.
1115          *
1116          * For now, treat symlinks of JSON files as regular files and create
1117          * separate tables for each symlink (presumably, each symlink refers
1118          * to specific version of the CPU).
1119          */
1120 
1121         maxfds = get_maxfds();
1122         mapfile = NULL;
1123         rc = nftw(ldirname, preprocess_arch_std_files, maxfds, 0);
1124         if (rc && verbose) {
1125                 pr_info("%s: Error preprocessing arch standard files %s\n",
1126                         prog, ldirname);
1127                 goto empty_map;
1128         } else if (rc < 0) {
1129                 /* Make build fail */
1130                 fclose(eventsfp);
1131                 free_arch_std_events();
1132                 return 1;
1133         } else if (rc) {
1134                 goto empty_map;
1135         }
1136 
1137         rc = nftw(ldirname, process_one_file, maxfds, 0);
1138         if (rc && verbose) {
1139                 pr_info("%s: Error walking file tree %s\n", prog, ldirname);
1140                 goto empty_map;
1141         } else if (rc < 0) {
1142                 /* Make build fail */
1143                 fclose(eventsfp);
1144                 free_arch_std_events();
1145                 return 1;
1146         } else if (rc) {
1147                 goto empty_map;
1148         }
1149 
1150         if (close_table)
1151                 print_events_table_suffix(eventsfp);
1152 
1153         if (!mapfile) {
1154                 pr_info("%s: No CPU->JSON mapping?\n", prog);
1155                 goto empty_map;
1156         }
1157 
1158         if (process_mapfile(eventsfp, mapfile)) {
1159                 pr_info("%s: Error processing mapfile %s\n", prog, mapfile);
1160                 /* Make build fail */
1161                 fclose(eventsfp);
1162                 free_arch_std_events();
1163                 return 1;
1164         }
1165 
1166         return 0;
1167 
1168 empty_map:
1169         fclose(eventsfp);
1170         create_empty_mapping(output_file);
1171         free_arch_std_events();
1172         return 0;
1173 }
/* [<][>][^][v][top][bottom][index][help] */
root/tools/perf/pmu-events/jevents.c

DEFINITIONS
