Commit | Line | Data |
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50656eec MH |
1 | /* |
2 | * probe-event.c : perf-probe definition to kprobe_events format converter | |
3 | * | |
4 | * Written by Masami Hiramatsu <mhiramat@redhat.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | * | |
20 | */ | |
21 | ||
22 | #define _GNU_SOURCE | |
23 | #include <sys/utsname.h> | |
24 | #include <sys/types.h> | |
25 | #include <sys/stat.h> | |
26 | #include <fcntl.h> | |
27 | #include <errno.h> | |
28 | #include <stdio.h> | |
29 | #include <unistd.h> | |
30 | #include <stdlib.h> | |
31 | #include <string.h> | |
4de189fe MH |
32 | #include <stdarg.h> |
33 | #include <limits.h> | |
50656eec MH |
34 | |
35 | #undef _GNU_SOURCE | |
36 | #include "event.h" | |
e1c01d61 | 37 | #include "string.h" |
4de189fe | 38 | #include "strlist.h" |
50656eec MH |
39 | #include "debug.h" |
40 | #include "parse-events.h" /* For debugfs_path */ | |
41 | #include "probe-event.h" | |
42 | ||
43 | #define MAX_CMDLEN 256 | |
44 | #define MAX_PROBE_ARGS 128 | |
45 | #define PERFPROBE_GROUP "probe" | |
46 | ||
47 | #define semantic_error(msg ...) die("Semantic error :" msg) | |
48 | ||
4de189fe | 49 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
50 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
51 | __attribute__((format(printf, 3, 4))); | |
52 | ||
4de189fe MH |
53 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
54 | { | |
55 | int ret; | |
56 | va_list ap; | |
57 | va_start(ap, format); | |
58 | ret = vsnprintf(str, size, format, ap); | |
59 | va_end(ap); | |
60 | if (ret >= (int)size) | |
61 | ret = -E2BIG; | |
62 | return ret; | |
63 | } | |
64 | ||
50656eec MH |
65 | /* Parse probepoint definition. */ |
66 | static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp) | |
67 | { | |
68 | char *ptr, *tmp; | |
69 | char c, nc = 0; | |
70 | /* | |
71 | * <Syntax> | |
72 | * perf probe SRC:LN | |
73 | * perf probe FUNC[+OFFS|%return][@SRC] | |
74 | */ | |
75 | ||
76 | ptr = strpbrk(arg, ":+@%"); | |
77 | if (ptr) { | |
78 | nc = *ptr; | |
79 | *ptr++ = '\0'; | |
80 | } | |
81 | ||
82 | /* Check arg is function or file and copy it */ | |
83 | if (strchr(arg, '.')) /* File */ | |
84 | pp->file = strdup(arg); | |
85 | else /* Function */ | |
86 | pp->function = strdup(arg); | |
87 | DIE_IF(pp->file == NULL && pp->function == NULL); | |
88 | ||
89 | /* Parse other options */ | |
90 | while (ptr) { | |
91 | arg = ptr; | |
92 | c = nc; | |
93 | ptr = strpbrk(arg, ":+@%"); | |
94 | if (ptr) { | |
95 | nc = *ptr; | |
96 | *ptr++ = '\0'; | |
97 | } | |
98 | switch (c) { | |
99 | case ':': /* Line number */ | |
100 | pp->line = strtoul(arg, &tmp, 0); | |
101 | if (*tmp != '\0') | |
102 | semantic_error("There is non-digit charactor" | |
103 | " in line number."); | |
104 | break; | |
105 | case '+': /* Byte offset from a symbol */ | |
106 | pp->offset = strtoul(arg, &tmp, 0); | |
107 | if (*tmp != '\0') | |
108 | semantic_error("There is non-digit charactor" | |
109 | " in offset."); | |
110 | break; | |
111 | case '@': /* File name */ | |
112 | if (pp->file) | |
113 | semantic_error("SRC@SRC is not allowed."); | |
114 | pp->file = strdup(arg); | |
115 | DIE_IF(pp->file == NULL); | |
116 | if (ptr) | |
117 | semantic_error("@SRC must be the last " | |
118 | "option."); | |
119 | break; | |
120 | case '%': /* Probe places */ | |
121 | if (strcmp(arg, "return") == 0) { | |
122 | pp->retprobe = 1; | |
123 | } else /* Others not supported yet */ | |
124 | semantic_error("%%%s is not supported.", arg); | |
125 | break; | |
126 | default: | |
127 | DIE_IF("Program has a bug."); | |
128 | break; | |
129 | } | |
130 | } | |
131 | ||
132 | /* Exclusion check */ | |
133 | if (pp->line && pp->offset) | |
134 | semantic_error("Offset can't be used with line number."); | |
135 | ||
136 | if (!pp->line && pp->file && !pp->function) | |
137 | semantic_error("File always requires line number."); | |
138 | ||
139 | if (pp->offset && !pp->function) | |
140 | semantic_error("Offset requires an entry function."); | |
141 | ||
142 | if (pp->retprobe && !pp->function) | |
143 | semantic_error("Return probe requires an entry function."); | |
144 | ||
145 | if ((pp->offset || pp->line) && pp->retprobe) | |
146 | semantic_error("Offset/Line can't be used with return probe."); | |
147 | ||
148 | pr_debug("symbol:%s file:%s line:%d offset:%d, return:%d\n", | |
149 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe); | |
150 | } | |
151 | ||
152 | /* Parse perf-probe event definition */ | |
fac13fd5 MH |
153 | void parse_perf_probe_event(const char *str, struct probe_point *pp, |
154 | bool *need_dwarf) | |
50656eec | 155 | { |
e1c01d61 | 156 | char **argv; |
fac13fd5 MH |
157 | int argc, i; |
158 | ||
159 | *need_dwarf = false; | |
50656eec | 160 | |
e1c01d61 MH |
161 | argv = argv_split(str, &argc); |
162 | if (!argv) | |
163 | die("argv_split failed."); | |
164 | if (argc > MAX_PROBE_ARGS + 1) | |
165 | semantic_error("Too many arguments"); | |
50656eec MH |
166 | |
167 | /* Parse probe point */ | |
168 | parse_perf_probe_probepoint(argv[0], pp); | |
50656eec | 169 | if (pp->file || pp->line) |
fac13fd5 | 170 | *need_dwarf = true; |
50656eec | 171 | |
e1c01d61 | 172 | /* Copy arguments and ensure return probe has no C argument */ |
50656eec | 173 | pp->nr_args = argc - 1; |
e1c01d61 MH |
174 | pp->args = zalloc(sizeof(char *) * pp->nr_args); |
175 | for (i = 0; i < pp->nr_args; i++) { | |
176 | pp->args[i] = strdup(argv[i + 1]); | |
177 | if (!pp->args[i]) | |
178 | die("Failed to copy argument."); | |
50656eec MH |
179 | if (is_c_varname(pp->args[i])) { |
180 | if (pp->retprobe) | |
181 | semantic_error("You can't specify local" | |
182 | " variable for kretprobe"); | |
fac13fd5 | 183 | *need_dwarf = true; |
50656eec | 184 | } |
e1c01d61 | 185 | } |
50656eec | 186 | |
e1c01d61 | 187 | argv_free(argv); |
50656eec MH |
188 | } |
189 | ||
4de189fe MH |
190 | /* Parse kprobe_events event into struct probe_point */ |
191 | void parse_trace_kprobe_event(const char *str, char **group, char **event, | |
192 | struct probe_point *pp) | |
193 | { | |
194 | char pr; | |
195 | char *p; | |
196 | int ret, i, argc; | |
197 | char **argv; | |
198 | ||
199 | pr_debug("Parsing kprobe_events: %s\n", str); | |
200 | argv = argv_split(str, &argc); | |
201 | if (!argv) | |
202 | die("argv_split failed."); | |
203 | if (argc < 2) | |
204 | semantic_error("Too less arguments."); | |
205 | ||
206 | /* Scan event and group name. */ | |
93aaa45a LW |
207 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
208 | &pr, (float *)(void *)group, (float *)(void *)event); | |
4de189fe MH |
209 | if (ret != 3) |
210 | semantic_error("Failed to parse event name: %s", argv[0]); | |
211 | pr_debug("Group:%s Event:%s probe:%c\n", *group, *event, pr); | |
212 | ||
213 | if (!pp) | |
214 | goto end; | |
215 | ||
216 | pp->retprobe = (pr == 'r'); | |
217 | ||
218 | /* Scan function name and offset */ | |
93aaa45a | 219 | ret = sscanf(argv[1], "%a[^+]+%d", (float *)(void *)&pp->function, &pp->offset); |
4de189fe MH |
220 | if (ret == 1) |
221 | pp->offset = 0; | |
222 | ||
223 | /* kprobe_events doesn't have this information */ | |
224 | pp->line = 0; | |
225 | pp->file = NULL; | |
226 | ||
227 | pp->nr_args = argc - 2; | |
228 | pp->args = zalloc(sizeof(char *) * pp->nr_args); | |
229 | for (i = 0; i < pp->nr_args; i++) { | |
230 | p = strchr(argv[i + 2], '='); | |
231 | if (p) /* We don't need which register is assigned. */ | |
232 | *p = '\0'; | |
233 | pp->args[i] = strdup(argv[i + 2]); | |
234 | if (!pp->args[i]) | |
235 | die("Failed to copy argument."); | |
236 | } | |
237 | ||
238 | end: | |
239 | argv_free(argv); | |
240 | } | |
241 | ||
242 | int synthesize_perf_probe_event(struct probe_point *pp) | |
243 | { | |
244 | char *buf; | |
245 | char offs[64] = "", line[64] = ""; | |
246 | int i, len, ret; | |
247 | ||
248 | pp->probes[0] = buf = zalloc(MAX_CMDLEN); | |
249 | if (!buf) | |
250 | die("Failed to allocate memory by zalloc."); | |
251 | if (pp->offset) { | |
252 | ret = e_snprintf(offs, 64, "+%d", pp->offset); | |
253 | if (ret <= 0) | |
254 | goto error; | |
255 | } | |
256 | if (pp->line) { | |
257 | ret = e_snprintf(line, 64, ":%d", pp->line); | |
258 | if (ret <= 0) | |
259 | goto error; | |
260 | } | |
261 | ||
262 | if (pp->function) | |
263 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s", pp->function, | |
264 | offs, pp->retprobe ? "%return" : "", line); | |
265 | else | |
84988450 | 266 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", pp->file, line); |
4de189fe MH |
267 | if (ret <= 0) |
268 | goto error; | |
269 | len = ret; | |
270 | ||
271 | for (i = 0; i < pp->nr_args; i++) { | |
272 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", | |
273 | pp->args[i]); | |
274 | if (ret <= 0) | |
275 | goto error; | |
276 | len += ret; | |
277 | } | |
278 | pp->found = 1; | |
279 | ||
280 | return pp->found; | |
281 | error: | |
282 | free(pp->probes[0]); | |
283 | ||
284 | return ret; | |
285 | } | |
286 | ||
50656eec MH |
287 | int synthesize_trace_kprobe_event(struct probe_point *pp) |
288 | { | |
289 | char *buf; | |
290 | int i, len, ret; | |
291 | ||
292 | pp->probes[0] = buf = zalloc(MAX_CMDLEN); | |
293 | if (!buf) | |
294 | die("Failed to allocate memory by zalloc."); | |
4de189fe MH |
295 | ret = e_snprintf(buf, MAX_CMDLEN, "%s+%d", pp->function, pp->offset); |
296 | if (ret <= 0) | |
50656eec MH |
297 | goto error; |
298 | len = ret; | |
299 | ||
300 | for (i = 0; i < pp->nr_args; i++) { | |
4de189fe MH |
301 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
302 | pp->args[i]); | |
303 | if (ret <= 0) | |
50656eec MH |
304 | goto error; |
305 | len += ret; | |
306 | } | |
307 | pp->found = 1; | |
308 | ||
309 | return pp->found; | |
310 | error: | |
311 | free(pp->probes[0]); | |
50656eec MH |
312 | |
313 | return ret; | |
314 | } | |
315 | ||
4de189fe MH |
316 | static int open_kprobe_events(int flags, int mode) |
317 | { | |
318 | char buf[PATH_MAX]; | |
319 | int ret; | |
320 | ||
321 | ret = e_snprintf(buf, PATH_MAX, "%s/../kprobe_events", debugfs_path); | |
322 | if (ret < 0) | |
323 | die("Failed to make kprobe_events path."); | |
324 | ||
325 | ret = open(buf, flags, mode); | |
326 | if (ret < 0) { | |
327 | if (errno == ENOENT) | |
328 | die("kprobe_events file does not exist -" | |
329 | " please rebuild with CONFIG_KPROBE_TRACER."); | |
330 | else | |
331 | die("Could not open kprobe_events file: %s", | |
332 | strerror(errno)); | |
333 | } | |
334 | return ret; | |
335 | } | |
336 | ||
337 | /* Get raw string list of current kprobe_events */ | |
338 | static struct strlist *get_trace_kprobe_event_rawlist(int fd) | |
339 | { | |
340 | int ret, idx; | |
341 | FILE *fp; | |
342 | char buf[MAX_CMDLEN]; | |
343 | char *p; | |
344 | struct strlist *sl; | |
345 | ||
346 | sl = strlist__new(true, NULL); | |
347 | ||
348 | fp = fdopen(dup(fd), "r"); | |
349 | while (!feof(fp)) { | |
350 | p = fgets(buf, MAX_CMDLEN, fp); | |
351 | if (!p) | |
352 | break; | |
353 | ||
354 | idx = strlen(p) - 1; | |
355 | if (p[idx] == '\n') | |
356 | p[idx] = '\0'; | |
357 | ret = strlist__add(sl, buf); | |
358 | if (ret < 0) | |
359 | die("strlist__add failed: %s", strerror(-ret)); | |
360 | } | |
361 | fclose(fp); | |
362 | ||
363 | return sl; | |
364 | } | |
365 | ||
366 | /* Free and zero clear probe_point */ | |
367 | static void clear_probe_point(struct probe_point *pp) | |
368 | { | |
369 | int i; | |
370 | ||
371 | if (pp->function) | |
372 | free(pp->function); | |
373 | if (pp->file) | |
374 | free(pp->file); | |
375 | for (i = 0; i < pp->nr_args; i++) | |
376 | free(pp->args[i]); | |
377 | if (pp->args) | |
378 | free(pp->args); | |
379 | for (i = 0; i < pp->found; i++) | |
380 | free(pp->probes[i]); | |
5660ce34 | 381 | memset(pp, 0, sizeof(*pp)); |
4de189fe MH |
382 | } |
383 | ||
278498d4 MH |
384 | /* Show an event */ |
385 | static void show_perf_probe_event(const char *group, const char *event, | |
386 | const char *place, struct probe_point *pp) | |
387 | { | |
7e990a51 | 388 | int i, ret; |
278498d4 MH |
389 | char buf[128]; |
390 | ||
7e990a51 MH |
391 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
392 | if (ret < 0) | |
393 | die("Failed to copy event: %s", strerror(-ret)); | |
278498d4 MH |
394 | printf(" %-40s (on %s", buf, place); |
395 | ||
396 | if (pp->nr_args > 0) { | |
397 | printf(" with"); | |
398 | for (i = 0; i < pp->nr_args; i++) | |
399 | printf(" %s", pp->args[i]); | |
400 | } | |
401 | printf(")\n"); | |
402 | } | |
403 | ||
4de189fe MH |
404 | /* List up current perf-probe events */ |
405 | void show_perf_probe_events(void) | |
406 | { | |
407 | unsigned int i; | |
278498d4 | 408 | int fd, nr; |
4de189fe MH |
409 | char *group, *event; |
410 | struct probe_point pp; | |
411 | struct strlist *rawlist; | |
412 | struct str_node *ent; | |
413 | ||
414 | fd = open_kprobe_events(O_RDONLY, 0); | |
415 | rawlist = get_trace_kprobe_event_rawlist(fd); | |
416 | close(fd); | |
417 | ||
418 | for (i = 0; i < strlist__nr_entries(rawlist); i++) { | |
419 | ent = strlist__entry(rawlist, i); | |
420 | parse_trace_kprobe_event(ent->s, &group, &event, &pp); | |
278498d4 MH |
421 | /* Synthesize only event probe point */ |
422 | nr = pp.nr_args; | |
423 | pp.nr_args = 0; | |
4de189fe | 424 | synthesize_perf_probe_event(&pp); |
278498d4 MH |
425 | pp.nr_args = nr; |
426 | /* Show an event */ | |
427 | show_perf_probe_event(group, event, pp.probes[0], &pp); | |
4de189fe MH |
428 | free(group); |
429 | free(event); | |
430 | clear_probe_point(&pp); | |
431 | } | |
432 | ||
433 | strlist__delete(rawlist); | |
434 | } | |
435 | ||
b498ce1f | 436 | /* Get current perf-probe event names */ |
fa28244d | 437 | static struct strlist *get_perf_event_names(int fd, bool include_group) |
b498ce1f MH |
438 | { |
439 | unsigned int i; | |
440 | char *group, *event; | |
fa28244d | 441 | char buf[128]; |
b498ce1f MH |
442 | struct strlist *sl, *rawlist; |
443 | struct str_node *ent; | |
444 | ||
445 | rawlist = get_trace_kprobe_event_rawlist(fd); | |
446 | ||
e1d2017b | 447 | sl = strlist__new(true, NULL); |
b498ce1f MH |
448 | for (i = 0; i < strlist__nr_entries(rawlist); i++) { |
449 | ent = strlist__entry(rawlist, i); | |
450 | parse_trace_kprobe_event(ent->s, &group, &event, NULL); | |
fa28244d MH |
451 | if (include_group) { |
452 | if (e_snprintf(buf, 128, "%s:%s", group, event) < 0) | |
453 | die("Failed to copy group:event name."); | |
454 | strlist__add(sl, buf); | |
455 | } else | |
456 | strlist__add(sl, event); | |
b498ce1f | 457 | free(group); |
e1d2017b | 458 | free(event); |
b498ce1f MH |
459 | } |
460 | ||
461 | strlist__delete(rawlist); | |
462 | ||
463 | return sl; | |
464 | } | |
465 | ||
a9b495b0 | 466 | static void write_trace_kprobe_event(int fd, const char *buf) |
50656eec MH |
467 | { |
468 | int ret; | |
469 | ||
fa28244d | 470 | pr_debug("Writing event: %s\n", buf); |
50656eec MH |
471 | ret = write(fd, buf, strlen(buf)); |
472 | if (ret <= 0) | |
fa28244d | 473 | die("Failed to write event: %s", strerror(errno)); |
50656eec MH |
474 | } |
475 | ||
b498ce1f MH |
476 | static void get_new_event_name(char *buf, size_t len, const char *base, |
477 | struct strlist *namelist) | |
478 | { | |
479 | int i, ret; | |
17f88fcd MH |
480 | |
481 | /* Try no suffix */ | |
482 | ret = e_snprintf(buf, len, "%s", base); | |
483 | if (ret < 0) | |
484 | die("snprintf() failed: %s", strerror(-ret)); | |
485 | if (!strlist__has_entry(namelist, buf)) | |
486 | return; | |
487 | ||
488 | /* Try to add suffix */ | |
489 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f MH |
490 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
491 | if (ret < 0) | |
492 | die("snprintf() failed: %s", strerror(-ret)); | |
493 | if (!strlist__has_entry(namelist, buf)) | |
494 | break; | |
495 | } | |
496 | if (i == MAX_EVENT_INDEX) | |
497 | die("Too many events are on the same function."); | |
498 | } | |
499 | ||
50656eec MH |
500 | void add_trace_kprobe_events(struct probe_point *probes, int nr_probes) |
501 | { | |
502 | int i, j, fd; | |
503 | struct probe_point *pp; | |
504 | char buf[MAX_CMDLEN]; | |
b498ce1f MH |
505 | char event[64]; |
506 | struct strlist *namelist; | |
50656eec | 507 | |
b498ce1f MH |
508 | fd = open_kprobe_events(O_RDWR, O_APPEND); |
509 | /* Get current event names */ | |
fa28244d | 510 | namelist = get_perf_event_names(fd, false); |
50656eec MH |
511 | |
512 | for (j = 0; j < nr_probes; j++) { | |
513 | pp = probes + j; | |
b498ce1f MH |
514 | for (i = 0; i < pp->found; i++) { |
515 | /* Get an unused new event name */ | |
516 | get_new_event_name(event, 64, pp->function, namelist); | |
517 | snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s\n", | |
518 | pp->retprobe ? 'r' : 'p', | |
519 | PERFPROBE_GROUP, event, | |
520 | pp->probes[i]); | |
50656eec | 521 | write_trace_kprobe_event(fd, buf); |
a9b495b0 MH |
522 | printf("Added new event:\n"); |
523 | /* Get the first parameter (probe-point) */ | |
524 | sscanf(pp->probes[i], "%s", buf); | |
525 | show_perf_probe_event(PERFPROBE_GROUP, event, | |
526 | buf, pp); | |
b498ce1f MH |
527 | /* Add added event name to namelist */ |
528 | strlist__add(namelist, event); | |
529 | } | |
50656eec | 530 | } |
a9b495b0 MH |
531 | /* Show how to use the event. */ |
532 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
533 | printf("\tperf record -e %s:%s -a sleep 1\n\n", PERFPROBE_GROUP, event); | |
534 | ||
e1d2017b | 535 | strlist__delete(namelist); |
50656eec MH |
536 | close(fd); |
537 | } | |
fa28244d MH |
538 | |
539 | static void del_trace_kprobe_event(int fd, const char *group, | |
540 | const char *event, struct strlist *namelist) | |
541 | { | |
542 | char buf[128]; | |
3e340590 | 543 | struct str_node *ent; |
fa28244d MH |
544 | |
545 | if (e_snprintf(buf, 128, "%s:%s", group, event) < 0) | |
546 | die("Failed to copy event."); | |
3e340590 MH |
547 | ent = strlist__find(namelist, buf); |
548 | if (!ent) { | |
f6bbff77 | 549 | pr_info("Info: event \"%s\" does not exist, could not remove it.\n", buf); |
fa28244d MH |
550 | return; |
551 | } | |
552 | /* Convert from perf-probe event to trace-kprobe event */ | |
553 | if (e_snprintf(buf, 128, "-:%s/%s", group, event) < 0) | |
554 | die("Failed to copy event."); | |
555 | ||
556 | write_trace_kprobe_event(fd, buf); | |
557 | printf("Remove event: %s:%s\n", group, event); | |
3e340590 | 558 | strlist__remove(namelist, ent); |
fa28244d MH |
559 | } |
560 | ||
561 | void del_trace_kprobe_events(struct strlist *dellist) | |
562 | { | |
563 | int fd; | |
564 | unsigned int i; | |
565 | const char *group, *event; | |
566 | char *p, *str; | |
567 | struct str_node *ent; | |
568 | struct strlist *namelist; | |
569 | ||
570 | fd = open_kprobe_events(O_RDWR, O_APPEND); | |
571 | /* Get current event names */ | |
572 | namelist = get_perf_event_names(fd, true); | |
573 | ||
574 | for (i = 0; i < strlist__nr_entries(dellist); i++) { | |
575 | ent = strlist__entry(dellist, i); | |
576 | str = strdup(ent->s); | |
577 | if (!str) | |
578 | die("Failed to copy event."); | |
579 | p = strchr(str, ':'); | |
580 | if (p) { | |
581 | group = str; | |
582 | *p = '\0'; | |
583 | event = p + 1; | |
584 | } else { | |
585 | group = PERFPROBE_GROUP; | |
586 | event = str; | |
587 | } | |
588 | del_trace_kprobe_event(fd, group, event, namelist); | |
589 | free(str); | |
590 | } | |
591 | strlist__delete(namelist); | |
592 | close(fd); | |
593 | } | |
594 |