Root/tools/perf/util/parse-events.c

1#include "../../../include/linux/hw_breakpoint.h"
2#include "util.h"
3#include "../perf.h"
4#include "parse-options.h"
5#include "parse-events.h"
6#include "exec_cmd.h"
7#include "string.h"
8#include "cache.h"
9#include "header.h"
10#include "debugfs.h"
11
12int nr_counters;
13
14struct perf_event_attr attrs[MAX_COUNTERS];
15char *filters[MAX_COUNTERS];
16
17struct event_symbol {
18    u8 type;
19    u64 config;
20    const char *symbol;
21    const char *alias;
22};
23
24enum event_result {
25    EVT_FAILED,
26    EVT_HANDLED,
27    EVT_HANDLED_ALL
28};
29
30char debugfs_path[MAXPATHLEN];
31
32#define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
33#define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
34
35static struct event_symbol event_symbols[] = {
36  { CHW(CPU_CYCLES), "cpu-cycles", "cycles" },
37  { CHW(INSTRUCTIONS), "instructions", "" },
38  { CHW(CACHE_REFERENCES), "cache-references", "" },
39  { CHW(CACHE_MISSES), "cache-misses", "" },
40  { CHW(BRANCH_INSTRUCTIONS), "branch-instructions", "branches" },
41  { CHW(BRANCH_MISSES), "branch-misses", "" },
42  { CHW(BUS_CYCLES), "bus-cycles", "" },
43
44  { CSW(CPU_CLOCK), "cpu-clock", "" },
45  { CSW(TASK_CLOCK), "task-clock", "" },
46  { CSW(PAGE_FAULTS), "page-faults", "faults" },
47  { CSW(PAGE_FAULTS_MIN), "minor-faults", "" },
48  { CSW(PAGE_FAULTS_MAJ), "major-faults", "" },
49  { CSW(CONTEXT_SWITCHES), "context-switches", "cs" },
50  { CSW(CPU_MIGRATIONS), "cpu-migrations", "migrations" },
51  { CSW(ALIGNMENT_FAULTS), "alignment-faults", "" },
52  { CSW(EMULATION_FAULTS), "emulation-faults", "" },
53};
54
55#define __PERF_EVENT_FIELD(config, name) \
56    ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
57
58#define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW)
59#define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG)
60#define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
61#define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
62
63static const char *hw_event_names[] = {
64    "cycles",
65    "instructions",
66    "cache-references",
67    "cache-misses",
68    "branches",
69    "branch-misses",
70    "bus-cycles",
71};
72
73static const char *sw_event_names[] = {
74    "cpu-clock-msecs",
75    "task-clock-msecs",
76    "page-faults",
77    "context-switches",
78    "CPU-migrations",
79    "minor-faults",
80    "major-faults",
81    "alignment-faults",
82    "emulation-faults",
83};
84
85#define MAX_ALIASES 8
86
87static const char *hw_cache[][MAX_ALIASES] = {
88 { "L1-dcache", "l1-d", "l1d", "L1-data", },
89 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
90 { "LLC", "L2" },
91 { "dTLB", "d-tlb", "Data-TLB", },
92 { "iTLB", "i-tlb", "Instruction-TLB", },
93 { "branch", "branches", "bpu", "btb", "bpc", },
94};
95
96static const char *hw_cache_op[][MAX_ALIASES] = {
97 { "load", "loads", "read", },
98 { "store", "stores", "write", },
99 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
100};
101
102static const char *hw_cache_result[][MAX_ALIASES] = {
103 { "refs", "Reference", "ops", "access", },
104 { "misses", "miss", },
105};
106
107#define C(x) PERF_COUNT_HW_CACHE_##x
108#define CACHE_READ (1 << C(OP_READ))
109#define CACHE_WRITE (1 << C(OP_WRITE))
110#define CACHE_PREFETCH (1 << C(OP_PREFETCH))
111#define COP(x) (1 << x)
112
113/*
114 * cache operartion stat
115 * L1I : Read and prefetch only
116 * ITLB and BPU : Read-only
117 */
118static unsigned long hw_cache_stat[C(MAX)] = {
119 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
120 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
121 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
122 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
123 [C(ITLB)] = (CACHE_READ),
124 [C(BPU)] = (CACHE_READ),
125};
126
127#define for_each_subsystem(sys_dir, sys_dirent, sys_next) \
128    while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \
129    if (sys_dirent.d_type == DT_DIR && \
130       (strcmp(sys_dirent.d_name, ".")) && \
131       (strcmp(sys_dirent.d_name, "..")))
132
133static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
134{
135    char evt_path[MAXPATHLEN];
136    int fd;
137
138    snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
139            sys_dir->d_name, evt_dir->d_name);
140    fd = open(evt_path, O_RDONLY);
141    if (fd < 0)
142        return -EINVAL;
143    close(fd);
144
145    return 0;
146}
147
148#define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) \
149    while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \
150    if (evt_dirent.d_type == DT_DIR && \
151       (strcmp(evt_dirent.d_name, ".")) && \
152       (strcmp(evt_dirent.d_name, "..")) && \
153       (!tp_event_has_id(&sys_dirent, &evt_dirent)))
154
155#define MAX_EVENT_LENGTH 512
156
157
158struct tracepoint_path *tracepoint_id_to_path(u64 config)
159{
160    struct tracepoint_path *path = NULL;
161    DIR *sys_dir, *evt_dir;
162    struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
163    char id_buf[4];
164    int fd;
165    u64 id;
166    char evt_path[MAXPATHLEN];
167    char dir_path[MAXPATHLEN];
168
169    if (debugfs_valid_mountpoint(debugfs_path))
170        return NULL;
171
172    sys_dir = opendir(debugfs_path);
173    if (!sys_dir)
174        return NULL;
175
176    for_each_subsystem(sys_dir, sys_dirent, sys_next) {
177
178        snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
179             sys_dirent.d_name);
180        evt_dir = opendir(dir_path);
181        if (!evt_dir)
182            continue;
183
184        for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
185
186            snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
187                 evt_dirent.d_name);
188            fd = open(evt_path, O_RDONLY);
189            if (fd < 0)
190                continue;
191            if (read(fd, id_buf, sizeof(id_buf)) < 0) {
192                close(fd);
193                continue;
194            }
195            close(fd);
196            id = atoll(id_buf);
197            if (id == config) {
198                closedir(evt_dir);
199                closedir(sys_dir);
200                path = zalloc(sizeof(*path));
201                path->system = malloc(MAX_EVENT_LENGTH);
202                if (!path->system) {
203                    free(path);
204                    return NULL;
205                }
206                path->name = malloc(MAX_EVENT_LENGTH);
207                if (!path->name) {
208                    free(path->system);
209                    free(path);
210                    return NULL;
211                }
212                strncpy(path->system, sys_dirent.d_name,
213                    MAX_EVENT_LENGTH);
214                strncpy(path->name, evt_dirent.d_name,
215                    MAX_EVENT_LENGTH);
216                return path;
217            }
218        }
219        closedir(evt_dir);
220    }
221
222    closedir(sys_dir);
223    return NULL;
224}
225
226#define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
227static const char *tracepoint_id_to_name(u64 config)
228{
229    static char buf[TP_PATH_LEN];
230    struct tracepoint_path *path;
231
232    path = tracepoint_id_to_path(config);
233    if (path) {
234        snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
235        free(path->name);
236        free(path->system);
237        free(path);
238    } else
239        snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
240
241    return buf;
242}
243
244static int is_cache_op_valid(u8 cache_type, u8 cache_op)
245{
246    if (hw_cache_stat[cache_type] & COP(cache_op))
247        return 1; /* valid */
248    else
249        return 0; /* invalid */
250}
251
252static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
253{
254    static char name[50];
255
256    if (cache_result) {
257        sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
258            hw_cache_op[cache_op][0],
259            hw_cache_result[cache_result][0]);
260    } else {
261        sprintf(name, "%s-%s", hw_cache[cache_type][0],
262            hw_cache_op[cache_op][1]);
263    }
264
265    return name;
266}
267
268const char *event_name(int counter)
269{
270    u64 config = attrs[counter].config;
271    int type = attrs[counter].type;
272
273    return __event_name(type, config);
274}
275
276const char *__event_name(int type, u64 config)
277{
278    static char buf[32];
279
280    if (type == PERF_TYPE_RAW) {
281        sprintf(buf, "raw 0x%llx", config);
282        return buf;
283    }
284
285    switch (type) {
286    case PERF_TYPE_HARDWARE:
287        if (config < PERF_COUNT_HW_MAX)
288            return hw_event_names[config];
289        return "unknown-hardware";
290
291    case PERF_TYPE_HW_CACHE: {
292        u8 cache_type, cache_op, cache_result;
293
294        cache_type = (config >> 0) & 0xff;
295        if (cache_type > PERF_COUNT_HW_CACHE_MAX)
296            return "unknown-ext-hardware-cache-type";
297
298        cache_op = (config >> 8) & 0xff;
299        if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
300            return "unknown-ext-hardware-cache-op";
301
302        cache_result = (config >> 16) & 0xff;
303        if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
304            return "unknown-ext-hardware-cache-result";
305
306        if (!is_cache_op_valid(cache_type, cache_op))
307            return "invalid-cache";
308
309        return event_cache_name(cache_type, cache_op, cache_result);
310    }
311
312    case PERF_TYPE_SOFTWARE:
313        if (config < PERF_COUNT_SW_MAX)
314            return sw_event_names[config];
315        return "unknown-software";
316
317    case PERF_TYPE_TRACEPOINT:
318        return tracepoint_id_to_name(config);
319
320    default:
321        break;
322    }
323
324    return "unknown";
325}
326
327static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
328{
329    int i, j;
330    int n, longest = -1;
331
332    for (i = 0; i < size; i++) {
333        for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
334            n = strlen(names[i][j]);
335            if (n > longest && !strncasecmp(*str, names[i][j], n))
336                longest = n;
337        }
338        if (longest > 0) {
339            *str += longest;
340            return i;
341        }
342    }
343
344    return -1;
345}
346
347static enum event_result
348parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
349{
350    const char *s = *str;
351    int cache_type = -1, cache_op = -1, cache_result = -1;
352
353    cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
354    /*
355     * No fallback - if we cannot get a clear cache type
356     * then bail out:
357     */
358    if (cache_type == -1)
359        return EVT_FAILED;
360
361    while ((cache_op == -1 || cache_result == -1) && *s == '-') {
362        ++s;
363
364        if (cache_op == -1) {
365            cache_op = parse_aliases(&s, hw_cache_op,
366                        PERF_COUNT_HW_CACHE_OP_MAX);
367            if (cache_op >= 0) {
368                if (!is_cache_op_valid(cache_type, cache_op))
369                    return 0;
370                continue;
371            }
372        }
373
374        if (cache_result == -1) {
375            cache_result = parse_aliases(&s, hw_cache_result,
376                        PERF_COUNT_HW_CACHE_RESULT_MAX);
377            if (cache_result >= 0)
378                continue;
379        }
380
381        /*
382         * Can't parse this as a cache op or result, so back up
383         * to the '-'.
384         */
385        --s;
386        break;
387    }
388
389    /*
390     * Fall back to reads:
391     */
392    if (cache_op == -1)
393        cache_op = PERF_COUNT_HW_CACHE_OP_READ;
394
395    /*
396     * Fall back to accesses:
397     */
398    if (cache_result == -1)
399        cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
400
401    attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
402    attr->type = PERF_TYPE_HW_CACHE;
403
404    *str = s;
405    return EVT_HANDLED;
406}
407
408static enum event_result
409parse_single_tracepoint_event(char *sys_name,
410                  const char *evt_name,
411                  unsigned int evt_length,
412                  char *flags,
413                  struct perf_event_attr *attr,
414                  const char **strp)
415{
416    char evt_path[MAXPATHLEN];
417    char id_buf[4];
418    u64 id;
419    int fd;
420
421    if (flags) {
422        if (!strncmp(flags, "record", strlen(flags))) {
423            attr->sample_type |= PERF_SAMPLE_RAW;
424            attr->sample_type |= PERF_SAMPLE_TIME;
425            attr->sample_type |= PERF_SAMPLE_CPU;
426        }
427    }
428
429    snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
430         sys_name, evt_name);
431
432    fd = open(evt_path, O_RDONLY);
433    if (fd < 0)
434        return EVT_FAILED;
435
436    if (read(fd, id_buf, sizeof(id_buf)) < 0) {
437        close(fd);
438        return EVT_FAILED;
439    }
440
441    close(fd);
442    id = atoll(id_buf);
443    attr->config = id;
444    attr->type = PERF_TYPE_TRACEPOINT;
445    *strp = evt_name + evt_length;
446
447    return EVT_HANDLED;
448}
449
450/* sys + ':' + event + ':' + flags*/
451#define MAX_EVOPT_LEN (MAX_EVENT_LENGTH * 2 + 2 + 128)
452static enum event_result
453parse_multiple_tracepoint_event(char *sys_name, const char *evt_exp,
454                char *flags)
455{
456    char evt_path[MAXPATHLEN];
457    struct dirent *evt_ent;
458    DIR *evt_dir;
459
460    snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
461    evt_dir = opendir(evt_path);
462
463    if (!evt_dir) {
464        perror("Can't open event dir");
465        return EVT_FAILED;
466    }
467
468    while ((evt_ent = readdir(evt_dir))) {
469        char event_opt[MAX_EVOPT_LEN + 1];
470        int len;
471
472        if (!strcmp(evt_ent->d_name, ".")
473            || !strcmp(evt_ent->d_name, "..")
474            || !strcmp(evt_ent->d_name, "enable")
475            || !strcmp(evt_ent->d_name, "filter"))
476            continue;
477
478        if (!strglobmatch(evt_ent->d_name, evt_exp))
479            continue;
480
481        len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
482                   evt_ent->d_name, flags ? ":" : "",
483                   flags ?: "");
484        if (len < 0)
485            return EVT_FAILED;
486
487        if (parse_events(NULL, event_opt, 0))
488            return EVT_FAILED;
489    }
490
491    return EVT_HANDLED_ALL;
492}
493
494
495static enum event_result parse_tracepoint_event(const char **strp,
496                    struct perf_event_attr *attr)
497{
498    const char *evt_name;
499    char *flags;
500    char sys_name[MAX_EVENT_LENGTH];
501    unsigned int sys_length, evt_length;
502
503    if (debugfs_valid_mountpoint(debugfs_path))
504        return 0;
505
506    evt_name = strchr(*strp, ':');
507    if (!evt_name)
508        return EVT_FAILED;
509
510    sys_length = evt_name - *strp;
511    if (sys_length >= MAX_EVENT_LENGTH)
512        return 0;
513
514    strncpy(sys_name, *strp, sys_length);
515    sys_name[sys_length] = '\0';
516    evt_name = evt_name + 1;
517
518    flags = strchr(evt_name, ':');
519    if (flags) {
520        /* split it out: */
521        evt_name = strndup(evt_name, flags - evt_name);
522        flags++;
523    }
524
525    evt_length = strlen(evt_name);
526    if (evt_length >= MAX_EVENT_LENGTH)
527        return EVT_FAILED;
528
529    if (strpbrk(evt_name, "*?")) {
530        *strp = evt_name + evt_length;
531        return parse_multiple_tracepoint_event(sys_name, evt_name,
532                               flags);
533    } else
534        return parse_single_tracepoint_event(sys_name, evt_name,
535                             evt_length, flags,
536                             attr, strp);
537}
538
539static enum event_result
540parse_breakpoint_type(const char *type, const char **strp,
541              struct perf_event_attr *attr)
542{
543    int i;
544
545    for (i = 0; i < 3; i++) {
546        if (!type[i])
547            break;
548
549        switch (type[i]) {
550        case 'r':
551            attr->bp_type |= HW_BREAKPOINT_R;
552            break;
553        case 'w':
554            attr->bp_type |= HW_BREAKPOINT_W;
555            break;
556        case 'x':
557            attr->bp_type |= HW_BREAKPOINT_X;
558            break;
559        default:
560            return EVT_FAILED;
561        }
562    }
563    if (!attr->bp_type) /* Default */
564        attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
565
566    *strp = type + i;
567
568    return EVT_HANDLED;
569}
570
571static enum event_result
572parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
573{
574    const char *target;
575    const char *type;
576    char *endaddr;
577    u64 addr;
578    enum event_result err;
579
580    target = strchr(*strp, ':');
581    if (!target)
582        return EVT_FAILED;
583
584    if (strncmp(*strp, "mem", target - *strp) != 0)
585        return EVT_FAILED;
586
587    target++;
588
589    addr = strtoull(target, &endaddr, 0);
590    if (target == endaddr)
591        return EVT_FAILED;
592
593    attr->bp_addr = addr;
594    *strp = endaddr;
595
596    type = strchr(target, ':');
597
598    /* If no type is defined, just rw as default */
599    if (!type) {
600        attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
601    } else {
602        err = parse_breakpoint_type(++type, strp, attr);
603        if (err == EVT_FAILED)
604            return EVT_FAILED;
605    }
606
607    /* We should find a nice way to override the access type */
608    attr->bp_len = HW_BREAKPOINT_LEN_4;
609    attr->type = PERF_TYPE_BREAKPOINT;
610
611    return EVT_HANDLED;
612}
613
614static int check_events(const char *str, unsigned int i)
615{
616    int n;
617
618    n = strlen(event_symbols[i].symbol);
619    if (!strncmp(str, event_symbols[i].symbol, n))
620        return n;
621
622    n = strlen(event_symbols[i].alias);
623    if (n)
624        if (!strncmp(str, event_symbols[i].alias, n))
625            return n;
626    return 0;
627}
628
629static enum event_result
630parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
631{
632    const char *str = *strp;
633    unsigned int i;
634    int n;
635
636    for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
637        n = check_events(str, i);
638        if (n > 0) {
639            attr->type = event_symbols[i].type;
640            attr->config = event_symbols[i].config;
641            *strp = str + n;
642            return EVT_HANDLED;
643        }
644    }
645    return EVT_FAILED;
646}
647
648static enum event_result
649parse_raw_event(const char **strp, struct perf_event_attr *attr)
650{
651    const char *str = *strp;
652    u64 config;
653    int n;
654
655    if (*str != 'r')
656        return EVT_FAILED;
657    n = hex2u64(str + 1, &config);
658    if (n > 0) {
659        *strp = str + n + 1;
660        attr->type = PERF_TYPE_RAW;
661        attr->config = config;
662        return EVT_HANDLED;
663    }
664    return EVT_FAILED;
665}
666
667static enum event_result
668parse_numeric_event(const char **strp, struct perf_event_attr *attr)
669{
670    const char *str = *strp;
671    char *endp;
672    unsigned long type;
673    u64 config;
674
675    type = strtoul(str, &endp, 0);
676    if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
677        str = endp + 1;
678        config = strtoul(str, &endp, 0);
679        if (endp > str) {
680            attr->type = type;
681            attr->config = config;
682            *strp = endp;
683            return EVT_HANDLED;
684        }
685    }
686    return EVT_FAILED;
687}
688
689static enum event_result
690parse_event_modifier(const char **strp, struct perf_event_attr *attr)
691{
692    const char *str = *strp;
693    int eu = 1, ek = 1, eh = 1;
694
695    if (*str++ != ':')
696        return 0;
697    while (*str) {
698        if (*str == 'u')
699            eu = 0;
700        else if (*str == 'k')
701            ek = 0;
702        else if (*str == 'h')
703            eh = 0;
704        else
705            break;
706        ++str;
707    }
708    if (str >= *strp + 2) {
709        *strp = str;
710        attr->exclude_user = eu;
711        attr->exclude_kernel = ek;
712        attr->exclude_hv = eh;
713        return 1;
714    }
715    return 0;
716}
717
718/*
719 * Each event can have multiple symbolic names.
720 * Symbolic names are (almost) exactly matched.
721 */
722static enum event_result
723parse_event_symbols(const char **str, struct perf_event_attr *attr)
724{
725    enum event_result ret;
726
727    ret = parse_tracepoint_event(str, attr);
728    if (ret != EVT_FAILED)
729        goto modifier;
730
731    ret = parse_raw_event(str, attr);
732    if (ret != EVT_FAILED)
733        goto modifier;
734
735    ret = parse_numeric_event(str, attr);
736    if (ret != EVT_FAILED)
737        goto modifier;
738
739    ret = parse_symbolic_event(str, attr);
740    if (ret != EVT_FAILED)
741        goto modifier;
742
743    ret = parse_generic_hw_event(str, attr);
744    if (ret != EVT_FAILED)
745        goto modifier;
746
747    ret = parse_breakpoint_event(str, attr);
748    if (ret != EVT_FAILED)
749        goto modifier;
750
751    fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
752    fprintf(stderr, "Run 'perf list' for a list of valid events\n");
753    return EVT_FAILED;
754
755modifier:
756    parse_event_modifier(str, attr);
757
758    return ret;
759}
760
761static int store_event_type(const char *orgname)
762{
763    char filename[PATH_MAX], *c;
764    FILE *file;
765    int id, n;
766
767    sprintf(filename, "%s/", debugfs_path);
768    strncat(filename, orgname, strlen(orgname));
769    strcat(filename, "/id");
770
771    c = strchr(filename, ':');
772    if (c)
773        *c = '/';
774
775    file = fopen(filename, "r");
776    if (!file)
777        return 0;
778    n = fscanf(file, "%i", &id);
779    fclose(file);
780    if (n < 1) {
781        pr_err("cannot store event ID\n");
782        return -EINVAL;
783    }
784    return perf_header__push_event(id, orgname);
785}
786
787int parse_events(const struct option *opt __used, const char *str, int unset __used)
788{
789    struct perf_event_attr attr;
790    enum event_result ret;
791
792    if (strchr(str, ':'))
793        if (store_event_type(str) < 0)
794            return -1;
795
796    for (;;) {
797        if (nr_counters == MAX_COUNTERS)
798            return -1;
799
800        memset(&attr, 0, sizeof(attr));
801        ret = parse_event_symbols(&str, &attr);
802        if (ret == EVT_FAILED)
803            return -1;
804
805        if (!(*str == 0 || *str == ',' || isspace(*str)))
806            return -1;
807
808        if (ret != EVT_HANDLED_ALL) {
809            attrs[nr_counters] = attr;
810            nr_counters++;
811        }
812
813        if (*str == 0)
814            break;
815        if (*str == ',')
816            ++str;
817        while (isspace(*str))
818            ++str;
819    }
820
821    return 0;
822}
823
824int parse_filter(const struct option *opt __used, const char *str,
825         int unset __used)
826{
827    int i = nr_counters - 1;
828    int len = strlen(str);
829
830    if (i < 0 || attrs[i].type != PERF_TYPE_TRACEPOINT) {
831        fprintf(stderr,
832            "-F option should follow a -e tracepoint option\n");
833        return -1;
834    }
835
836    filters[i] = malloc(len + 1);
837    if (!filters[i]) {
838        fprintf(stderr, "not enough memory to hold filter string\n");
839        return -1;
840    }
841    strcpy(filters[i], str);
842
843    return 0;
844}
845
846static const char * const event_type_descriptors[] = {
847    "Hardware event",
848    "Software event",
849    "Tracepoint event",
850    "Hardware cache event",
851    "Raw hardware event descriptor",
852    "Hardware breakpoint",
853};
854
855/*
856 * Print the events from <debugfs_mount_point>/tracing/events
857 */
858
859static void print_tracepoint_events(void)
860{
861    DIR *sys_dir, *evt_dir;
862    struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
863    char evt_path[MAXPATHLEN];
864    char dir_path[MAXPATHLEN];
865
866    if (debugfs_valid_mountpoint(debugfs_path))
867        return;
868
869    sys_dir = opendir(debugfs_path);
870    if (!sys_dir)
871        return;
872
873    for_each_subsystem(sys_dir, sys_dirent, sys_next) {
874
875        snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
876             sys_dirent.d_name);
877        evt_dir = opendir(dir_path);
878        if (!evt_dir)
879            continue;
880
881        for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
882            snprintf(evt_path, MAXPATHLEN, "%s:%s",
883                 sys_dirent.d_name, evt_dirent.d_name);
884            printf(" %-42s [%s]\n", evt_path,
885                event_type_descriptors[PERF_TYPE_TRACEPOINT]);
886        }
887        closedir(evt_dir);
888    }
889    closedir(sys_dir);
890}
891
892/*
893 * Print the help text for the event symbols:
894 */
895void print_events(void)
896{
897    struct event_symbol *syms = event_symbols;
898    unsigned int i, type, op, prev_type = -1;
899    char name[40];
900
901    printf("\n");
902    printf("List of pre-defined events (to be used in -e):\n");
903
904    for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
905        type = syms->type;
906
907        if (type != prev_type)
908            printf("\n");
909
910        if (strlen(syms->alias))
911            sprintf(name, "%s OR %s", syms->symbol, syms->alias);
912        else
913            strcpy(name, syms->symbol);
914        printf(" %-42s [%s]\n", name,
915            event_type_descriptors[type]);
916
917        prev_type = type;
918    }
919
920    printf("\n");
921    for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
922        for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
923            /* skip invalid cache type */
924            if (!is_cache_op_valid(type, op))
925                continue;
926
927            for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
928                printf(" %-42s [%s]\n",
929                    event_cache_name(type, op, i),
930                    event_type_descriptors[PERF_TYPE_HW_CACHE]);
931            }
932        }
933    }
934
935    printf("\n");
936    printf(" %-42s [%s]\n",
937        "rNNN", event_type_descriptors[PERF_TYPE_RAW]);
938    printf("\n");
939
940    printf(" %-42s [%s]\n",
941            "mem:<addr>[:access]",
942            event_type_descriptors[PERF_TYPE_BREAKPOINT]);
943    printf("\n");
944
945    print_tracepoint_events();
946
947    exit(129);
948}
949

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