blob: add379c55c36bd829023b37d7270367b19751c92 [file] [log] [blame]
Masami Hiramatsu50656ee2009-11-30 19:19:58 -05001/*
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>
Masami Hiramatsu4de189f2009-11-30 19:20:17 -050032#include <stdarg.h>
33#include <limits.h>
Masami Hiramatsu50656ee2009-11-30 19:19:58 -050034
35#undef _GNU_SOURCE
36#include "event.h"
Masami Hiramatsue1c01d62009-11-30 19:20:05 -050037#include "string.h"
Masami Hiramatsu4de189f2009-11-30 19:20:17 -050038#include "strlist.h"
Masami Hiramatsu50656ee2009-11-30 19:19:58 -050039#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
Masami Hiramatsu4de189f2009-11-30 19:20:17 -050049/* If there is no space to write, returns -E2BIG. */
50static int e_snprintf(char *str, size_t size, const char *format, ...)
Masami Hiramatsu84988452009-12-07 12:00:53 -050051 __attribute__((format(printf, 3, 4)));
52
53static int e_snprintf(char *str, size_t size, const char *format, ...)
Masami Hiramatsu4de189f2009-11-30 19:20:17 -050054{
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
Masami Hiramatsu50656ee2009-11-30 19:19:58 -050065/* Parse probepoint definition. */
66static 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 */
Masami Hiramatsufac13fd2009-12-15 10:31:14 -0500153void parse_perf_probe_event(const char *str, struct probe_point *pp,
154 bool *need_dwarf)
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500155{
Masami Hiramatsue1c01d62009-11-30 19:20:05 -0500156 char **argv;
Masami Hiramatsufac13fd2009-12-15 10:31:14 -0500157 int argc, i;
158
159 *need_dwarf = false;
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500160
Masami Hiramatsue1c01d62009-11-30 19:20:05 -0500161 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");
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500166
167 /* Parse probe point */
168 parse_perf_probe_probepoint(argv[0], pp);
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500169 if (pp->file || pp->line)
Masami Hiramatsufac13fd2009-12-15 10:31:14 -0500170 *need_dwarf = true;
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500171
Masami Hiramatsue1c01d62009-11-30 19:20:05 -0500172 /* Copy arguments and ensure return probe has no C argument */
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500173 pp->nr_args = argc - 1;
Masami Hiramatsue1c01d62009-11-30 19:20:05 -0500174 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.");
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500179 if (is_c_varname(pp->args[i])) {
180 if (pp->retprobe)
181 semantic_error("You can't specify local"
182 " variable for kretprobe");
Masami Hiramatsufac13fd2009-12-15 10:31:14 -0500183 *need_dwarf = true;
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500184 }
Masami Hiramatsue1c01d62009-11-30 19:20:05 -0500185 }
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500186
Masami Hiramatsue1c01d62009-11-30 19:20:05 -0500187 argv_free(argv);
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500188}
189
Masami Hiramatsu4de189f2009-11-30 19:20:17 -0500190/* Parse kprobe_events event into struct probe_point */
191void 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. */
Liming Wang93aaa452009-12-02 16:42:54 +0800207 ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]",
208 &pr, (float *)(void *)group, (float *)(void *)event);
Masami Hiramatsu4de189f2009-11-30 19:20:17 -0500209 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 */
Liming Wang93aaa452009-12-02 16:42:54 +0800219 ret = sscanf(argv[1], "%a[^+]+%d", (float *)(void *)&pp->function, &pp->offset);
Masami Hiramatsu4de189f2009-11-30 19:20:17 -0500220 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
238end:
239 argv_free(argv);
240}
241
242int synthesize_perf_probe_event(struct probe_point *pp)
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500243{
244 char *buf;
Masami Hiramatsu4de189f2009-11-30 19:20:17 -0500245 char offs[64] = "", line[64] = "";
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500246 int i, len, ret;
247
248 pp->probes[0] = buf = zalloc(MAX_CMDLEN);
249 if (!buf)
250 die("Failed to allocate memory by zalloc.");
Masami Hiramatsu4de189f2009-11-30 19:20:17 -0500251 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
Masami Hiramatsu84988452009-12-07 12:00:53 -0500266 ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", pp->file, line);
Masami Hiramatsu4de189f2009-11-30 19:20:17 -0500267 if (ret <= 0)
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500268 goto error;
269 len = ret;
270
271 for (i = 0; i < pp->nr_args; i++) {
Masami Hiramatsu4de189f2009-11-30 19:20:17 -0500272 ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s",
273 pp->args[i]);
274 if (ret <= 0)
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500275 goto error;
276 len += ret;
277 }
278 pp->found = 1;
279
280 return pp->found;
281error:
282 free(pp->probes[0]);
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500283
284 return ret;
285}
286
Masami Hiramatsu4de189f2009-11-30 19:20:17 -0500287int 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.");
295 ret = e_snprintf(buf, MAX_CMDLEN, "%s+%d", pp->function, pp->offset);
296 if (ret <= 0)
297 goto error;
298 len = ret;
299
300 for (i = 0; i < pp->nr_args; i++) {
301 ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s",
302 pp->args[i]);
303 if (ret <= 0)
304 goto error;
305 len += ret;
306 }
307 pp->found = 1;
308
309 return pp->found;
310error:
311 free(pp->probes[0]);
312
313 return ret;
314}
315
316static 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 */
338static 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 */
367static 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]);
Julia Lawall5660ce32009-12-09 20:26:18 +0100381 memset(pp, 0, sizeof(*pp));
Masami Hiramatsu4de189f2009-11-30 19:20:17 -0500382}
383
Masami Hiramatsu278498d2009-12-08 17:02:40 -0500384/* Show an event */
385static void show_perf_probe_event(const char *group, const char *event,
386 const char *place, struct probe_point *pp)
387{
388 int i;
389 char buf[128];
390
391 e_snprintf(buf, 128, "%s:%s", group, event);
392 printf(" %-40s (on %s", buf, place);
393
394 if (pp->nr_args > 0) {
395 printf(" with");
396 for (i = 0; i < pp->nr_args; i++)
397 printf(" %s", pp->args[i]);
398 }
399 printf(")\n");
400}
401
Masami Hiramatsu4de189f2009-11-30 19:20:17 -0500402/* List up current perf-probe events */
403void show_perf_probe_events(void)
404{
405 unsigned int i;
Masami Hiramatsu278498d2009-12-08 17:02:40 -0500406 int fd, nr;
Masami Hiramatsu4de189f2009-11-30 19:20:17 -0500407 char *group, *event;
408 struct probe_point pp;
409 struct strlist *rawlist;
410 struct str_node *ent;
411
412 fd = open_kprobe_events(O_RDONLY, 0);
413 rawlist = get_trace_kprobe_event_rawlist(fd);
414 close(fd);
415
416 for (i = 0; i < strlist__nr_entries(rawlist); i++) {
417 ent = strlist__entry(rawlist, i);
418 parse_trace_kprobe_event(ent->s, &group, &event, &pp);
Masami Hiramatsu278498d2009-12-08 17:02:40 -0500419 /* Synthesize only event probe point */
420 nr = pp.nr_args;
421 pp.nr_args = 0;
Masami Hiramatsu4de189f2009-11-30 19:20:17 -0500422 synthesize_perf_probe_event(&pp);
Masami Hiramatsu278498d2009-12-08 17:02:40 -0500423 pp.nr_args = nr;
424 /* Show an event */
425 show_perf_probe_event(group, event, pp.probes[0], &pp);
Masami Hiramatsu4de189f2009-11-30 19:20:17 -0500426 free(group);
427 free(event);
428 clear_probe_point(&pp);
429 }
430
431 strlist__delete(rawlist);
432}
433
Masami Hiramatsub498ce12009-11-30 19:20:25 -0500434/* Get current perf-probe event names */
Masami Hiramatsufa282442009-12-08 17:03:23 -0500435static struct strlist *get_perf_event_names(int fd, bool include_group)
Masami Hiramatsub498ce12009-11-30 19:20:25 -0500436{
437 unsigned int i;
438 char *group, *event;
Masami Hiramatsufa282442009-12-08 17:03:23 -0500439 char buf[128];
Masami Hiramatsub498ce12009-11-30 19:20:25 -0500440 struct strlist *sl, *rawlist;
441 struct str_node *ent;
442
443 rawlist = get_trace_kprobe_event_rawlist(fd);
444
Masami Hiramatsue1d20172009-12-07 12:00:46 -0500445 sl = strlist__new(true, NULL);
Masami Hiramatsub498ce12009-11-30 19:20:25 -0500446 for (i = 0; i < strlist__nr_entries(rawlist); i++) {
447 ent = strlist__entry(rawlist, i);
448 parse_trace_kprobe_event(ent->s, &group, &event, NULL);
Masami Hiramatsufa282442009-12-08 17:03:23 -0500449 if (include_group) {
450 if (e_snprintf(buf, 128, "%s:%s", group, event) < 0)
451 die("Failed to copy group:event name.");
452 strlist__add(sl, buf);
453 } else
454 strlist__add(sl, event);
Masami Hiramatsub498ce12009-11-30 19:20:25 -0500455 free(group);
Masami Hiramatsue1d20172009-12-07 12:00:46 -0500456 free(event);
Masami Hiramatsub498ce12009-11-30 19:20:25 -0500457 }
458
459 strlist__delete(rawlist);
460
461 return sl;
462}
463
Masami Hiramatsua9b495b2009-12-08 17:02:47 -0500464static void write_trace_kprobe_event(int fd, const char *buf)
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500465{
466 int ret;
467
Masami Hiramatsufa282442009-12-08 17:03:23 -0500468 pr_debug("Writing event: %s\n", buf);
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500469 ret = write(fd, buf, strlen(buf));
470 if (ret <= 0)
Masami Hiramatsufa282442009-12-08 17:03:23 -0500471 die("Failed to write event: %s", strerror(errno));
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500472}
473
Masami Hiramatsub498ce12009-11-30 19:20:25 -0500474static void get_new_event_name(char *buf, size_t len, const char *base,
475 struct strlist *namelist)
476{
477 int i, ret;
Masami Hiramatsu17f88fc2009-12-08 17:03:02 -0500478
479 /* Try no suffix */
480 ret = e_snprintf(buf, len, "%s", base);
481 if (ret < 0)
482 die("snprintf() failed: %s", strerror(-ret));
483 if (!strlist__has_entry(namelist, buf))
484 return;
485
486 /* Try to add suffix */
487 for (i = 1; i < MAX_EVENT_INDEX; i++) {
Masami Hiramatsub498ce12009-11-30 19:20:25 -0500488 ret = e_snprintf(buf, len, "%s_%d", base, i);
489 if (ret < 0)
490 die("snprintf() failed: %s", strerror(-ret));
491 if (!strlist__has_entry(namelist, buf))
492 break;
493 }
494 if (i == MAX_EVENT_INDEX)
495 die("Too many events are on the same function.");
496}
497
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500498void add_trace_kprobe_events(struct probe_point *probes, int nr_probes)
499{
500 int i, j, fd;
501 struct probe_point *pp;
502 char buf[MAX_CMDLEN];
Masami Hiramatsub498ce12009-11-30 19:20:25 -0500503 char event[64];
504 struct strlist *namelist;
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500505
Masami Hiramatsub498ce12009-11-30 19:20:25 -0500506 fd = open_kprobe_events(O_RDWR, O_APPEND);
507 /* Get current event names */
Masami Hiramatsufa282442009-12-08 17:03:23 -0500508 namelist = get_perf_event_names(fd, false);
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500509
510 for (j = 0; j < nr_probes; j++) {
511 pp = probes + j;
Masami Hiramatsub498ce12009-11-30 19:20:25 -0500512 for (i = 0; i < pp->found; i++) {
513 /* Get an unused new event name */
514 get_new_event_name(event, 64, pp->function, namelist);
515 snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s\n",
516 pp->retprobe ? 'r' : 'p',
517 PERFPROBE_GROUP, event,
518 pp->probes[i]);
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500519 write_trace_kprobe_event(fd, buf);
Masami Hiramatsua9b495b2009-12-08 17:02:47 -0500520 printf("Added new event:\n");
521 /* Get the first parameter (probe-point) */
522 sscanf(pp->probes[i], "%s", buf);
523 show_perf_probe_event(PERFPROBE_GROUP, event,
524 buf, pp);
Masami Hiramatsub498ce12009-11-30 19:20:25 -0500525 /* Add added event name to namelist */
526 strlist__add(namelist, event);
527 }
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500528 }
Masami Hiramatsua9b495b2009-12-08 17:02:47 -0500529 /* Show how to use the event. */
530 printf("\nYou can now use it on all perf tools, such as:\n\n");
531 printf("\tperf record -e %s:%s -a sleep 1\n\n", PERFPROBE_GROUP, event);
532
Masami Hiramatsue1d20172009-12-07 12:00:46 -0500533 strlist__delete(namelist);
Masami Hiramatsu50656ee2009-11-30 19:19:58 -0500534 close(fd);
535}
Masami Hiramatsufa282442009-12-08 17:03:23 -0500536
537static void del_trace_kprobe_event(int fd, const char *group,
538 const char *event, struct strlist *namelist)
539{
540 char buf[128];
541
542 if (e_snprintf(buf, 128, "%s:%s", group, event) < 0)
543 die("Failed to copy event.");
544 if (!strlist__has_entry(namelist, buf)) {
545 pr_warning("Warning: event \"%s\" is not found.\n", buf);
546 return;
547 }
548 /* Convert from perf-probe event to trace-kprobe event */
549 if (e_snprintf(buf, 128, "-:%s/%s", group, event) < 0)
550 die("Failed to copy event.");
551
552 write_trace_kprobe_event(fd, buf);
553 printf("Remove event: %s:%s\n", group, event);
554}
555
556void del_trace_kprobe_events(struct strlist *dellist)
557{
558 int fd;
559 unsigned int i;
560 const char *group, *event;
561 char *p, *str;
562 struct str_node *ent;
563 struct strlist *namelist;
564
565 fd = open_kprobe_events(O_RDWR, O_APPEND);
566 /* Get current event names */
567 namelist = get_perf_event_names(fd, true);
568
569 for (i = 0; i < strlist__nr_entries(dellist); i++) {
570 ent = strlist__entry(dellist, i);
571 str = strdup(ent->s);
572 if (!str)
573 die("Failed to copy event.");
574 p = strchr(str, ':');
575 if (p) {
576 group = str;
577 *p = '\0';
578 event = p + 1;
579 } else {
580 group = PERFPROBE_GROUP;
581 event = str;
582 }
583 del_trace_kprobe_event(fd, group, event, namelist);
584 free(str);
585 }
586 strlist__delete(namelist);
587 close(fd);
588}
589