Commit | Line | Data |
---|---|---|
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 | 39 | #include "debug.h" |
72041334 | 40 | #include "cache.h" |
50656eec MH |
41 | #include "parse-events.h" /* For debugfs_path */ |
42 | #include "probe-event.h" | |
43 | ||
44 | #define MAX_CMDLEN 256 | |
45 | #define MAX_PROBE_ARGS 128 | |
46 | #define PERFPROBE_GROUP "probe" | |
47 | ||
48 | #define semantic_error(msg ...) die("Semantic error :" msg) | |
49 | ||
4de189fe | 50 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
51 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
52 | __attribute__((format(printf, 3, 4))); | |
53 | ||
4de189fe MH |
54 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
55 | { | |
56 | int ret; | |
57 | va_list ap; | |
58 | va_start(ap, format); | |
59 | ret = vsnprintf(str, size, format, ap); | |
60 | va_end(ap); | |
61 | if (ret >= (int)size) | |
62 | ret = -E2BIG; | |
63 | return ret; | |
64 | } | |
65 | ||
b7702a21 MH |
66 | /* Check the name is good for event/group */ |
67 | static bool check_event_name(const char *name) | |
68 | { | |
69 | if (!isalpha(*name) && *name != '_') | |
70 | return false; | |
71 | while (*++name != '\0') { | |
72 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
73 | return false; | |
74 | } | |
75 | return true; | |
76 | } | |
77 | ||
50656eec MH |
78 | /* Parse probepoint definition. */ |
79 | static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp) | |
80 | { | |
81 | char *ptr, *tmp; | |
82 | char c, nc = 0; | |
83 | /* | |
84 | * <Syntax> | |
af663d75 MH |
85 | * perf probe [EVENT=]SRC:LN |
86 | * perf probe [EVENT=]FUNC[+OFFS|%return][@SRC] | |
87 | * | |
88 | * TODO:Group name support | |
50656eec MH |
89 | */ |
90 | ||
af663d75 MH |
91 | ptr = strchr(arg, '='); |
92 | if (ptr) { /* Event name */ | |
93 | *ptr = '\0'; | |
94 | tmp = ptr + 1; | |
95 | ptr = strchr(arg, ':'); | |
96 | if (ptr) /* Group name is not supported yet. */ | |
97 | semantic_error("Group name is not supported yet."); | |
b7702a21 MH |
98 | if (!check_event_name(arg)) |
99 | semantic_error("%s is bad for event name -it must " | |
100 | "follow C symbol-naming rule.", arg); | |
af663d75 MH |
101 | pp->event = strdup(arg); |
102 | arg = tmp; | |
103 | } | |
104 | ||
50656eec MH |
105 | ptr = strpbrk(arg, ":+@%"); |
106 | if (ptr) { | |
107 | nc = *ptr; | |
108 | *ptr++ = '\0'; | |
109 | } | |
110 | ||
111 | /* Check arg is function or file and copy it */ | |
112 | if (strchr(arg, '.')) /* File */ | |
113 | pp->file = strdup(arg); | |
114 | else /* Function */ | |
115 | pp->function = strdup(arg); | |
116 | DIE_IF(pp->file == NULL && pp->function == NULL); | |
117 | ||
118 | /* Parse other options */ | |
119 | while (ptr) { | |
120 | arg = ptr; | |
121 | c = nc; | |
122 | ptr = strpbrk(arg, ":+@%"); | |
123 | if (ptr) { | |
124 | nc = *ptr; | |
125 | *ptr++ = '\0'; | |
126 | } | |
127 | switch (c) { | |
128 | case ':': /* Line number */ | |
129 | pp->line = strtoul(arg, &tmp, 0); | |
130 | if (*tmp != '\0') | |
131 | semantic_error("There is non-digit charactor" | |
132 | " in line number."); | |
133 | break; | |
134 | case '+': /* Byte offset from a symbol */ | |
135 | pp->offset = strtoul(arg, &tmp, 0); | |
136 | if (*tmp != '\0') | |
137 | semantic_error("There is non-digit charactor" | |
138 | " in offset."); | |
139 | break; | |
140 | case '@': /* File name */ | |
141 | if (pp->file) | |
142 | semantic_error("SRC@SRC is not allowed."); | |
143 | pp->file = strdup(arg); | |
144 | DIE_IF(pp->file == NULL); | |
145 | if (ptr) | |
146 | semantic_error("@SRC must be the last " | |
147 | "option."); | |
148 | break; | |
149 | case '%': /* Probe places */ | |
150 | if (strcmp(arg, "return") == 0) { | |
151 | pp->retprobe = 1; | |
152 | } else /* Others not supported yet */ | |
153 | semantic_error("%%%s is not supported.", arg); | |
154 | break; | |
155 | default: | |
156 | DIE_IF("Program has a bug."); | |
157 | break; | |
158 | } | |
159 | } | |
160 | ||
161 | /* Exclusion check */ | |
162 | if (pp->line && pp->offset) | |
163 | semantic_error("Offset can't be used with line number."); | |
164 | ||
165 | if (!pp->line && pp->file && !pp->function) | |
166 | semantic_error("File always requires line number."); | |
167 | ||
168 | if (pp->offset && !pp->function) | |
169 | semantic_error("Offset requires an entry function."); | |
170 | ||
171 | if (pp->retprobe && !pp->function) | |
172 | semantic_error("Return probe requires an entry function."); | |
173 | ||
174 | if ((pp->offset || pp->line) && pp->retprobe) | |
175 | semantic_error("Offset/Line can't be used with return probe."); | |
176 | ||
177 | pr_debug("symbol:%s file:%s line:%d offset:%d, return:%d\n", | |
178 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe); | |
179 | } | |
180 | ||
181 | /* Parse perf-probe event definition */ | |
fac13fd5 MH |
182 | void parse_perf_probe_event(const char *str, struct probe_point *pp, |
183 | bool *need_dwarf) | |
50656eec | 184 | { |
e1c01d61 | 185 | char **argv; |
fac13fd5 MH |
186 | int argc, i; |
187 | ||
188 | *need_dwarf = false; | |
50656eec | 189 | |
e1c01d61 MH |
190 | argv = argv_split(str, &argc); |
191 | if (!argv) | |
192 | die("argv_split failed."); | |
193 | if (argc > MAX_PROBE_ARGS + 1) | |
194 | semantic_error("Too many arguments"); | |
50656eec MH |
195 | |
196 | /* Parse probe point */ | |
197 | parse_perf_probe_probepoint(argv[0], pp); | |
50656eec | 198 | if (pp->file || pp->line) |
fac13fd5 | 199 | *need_dwarf = true; |
50656eec | 200 | |
e1c01d61 | 201 | /* Copy arguments and ensure return probe has no C argument */ |
50656eec | 202 | pp->nr_args = argc - 1; |
e1c01d61 MH |
203 | pp->args = zalloc(sizeof(char *) * pp->nr_args); |
204 | for (i = 0; i < pp->nr_args; i++) { | |
205 | pp->args[i] = strdup(argv[i + 1]); | |
206 | if (!pp->args[i]) | |
207 | die("Failed to copy argument."); | |
50656eec MH |
208 | if (is_c_varname(pp->args[i])) { |
209 | if (pp->retprobe) | |
210 | semantic_error("You can't specify local" | |
211 | " variable for kretprobe"); | |
fac13fd5 | 212 | *need_dwarf = true; |
50656eec | 213 | } |
e1c01d61 | 214 | } |
50656eec | 215 | |
e1c01d61 | 216 | argv_free(argv); |
50656eec MH |
217 | } |
218 | ||
4de189fe | 219 | /* Parse kprobe_events event into struct probe_point */ |
af663d75 | 220 | void parse_trace_kprobe_event(const char *str, struct probe_point *pp) |
4de189fe MH |
221 | { |
222 | char pr; | |
223 | char *p; | |
224 | int ret, i, argc; | |
225 | char **argv; | |
226 | ||
227 | pr_debug("Parsing kprobe_events: %s\n", str); | |
228 | argv = argv_split(str, &argc); | |
229 | if (!argv) | |
230 | die("argv_split failed."); | |
231 | if (argc < 2) | |
232 | semantic_error("Too less arguments."); | |
233 | ||
234 | /* Scan event and group name. */ | |
93aaa45a | 235 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
af663d75 MH |
236 | &pr, (float *)(void *)&pp->group, |
237 | (float *)(void *)&pp->event); | |
4de189fe MH |
238 | if (ret != 3) |
239 | semantic_error("Failed to parse event name: %s", argv[0]); | |
af663d75 | 240 | pr_debug("Group:%s Event:%s probe:%c\n", pp->group, pp->event, pr); |
4de189fe MH |
241 | |
242 | pp->retprobe = (pr == 'r'); | |
243 | ||
244 | /* Scan function name and offset */ | |
af663d75 MH |
245 | ret = sscanf(argv[1], "%a[^+]+%d", (float *)(void *)&pp->function, |
246 | &pp->offset); | |
4de189fe MH |
247 | if (ret == 1) |
248 | pp->offset = 0; | |
249 | ||
250 | /* kprobe_events doesn't have this information */ | |
251 | pp->line = 0; | |
252 | pp->file = NULL; | |
253 | ||
254 | pp->nr_args = argc - 2; | |
255 | pp->args = zalloc(sizeof(char *) * pp->nr_args); | |
256 | for (i = 0; i < pp->nr_args; i++) { | |
257 | p = strchr(argv[i + 2], '='); | |
258 | if (p) /* We don't need which register is assigned. */ | |
259 | *p = '\0'; | |
260 | pp->args[i] = strdup(argv[i + 2]); | |
261 | if (!pp->args[i]) | |
262 | die("Failed to copy argument."); | |
263 | } | |
264 | ||
4de189fe MH |
265 | argv_free(argv); |
266 | } | |
267 | ||
7ef17aaf MH |
268 | /* Synthesize only probe point (not argument) */ |
269 | int synthesize_perf_probe_point(struct probe_point *pp) | |
4de189fe MH |
270 | { |
271 | char *buf; | |
272 | char offs[64] = "", line[64] = ""; | |
7ef17aaf | 273 | int ret; |
4de189fe MH |
274 | |
275 | pp->probes[0] = buf = zalloc(MAX_CMDLEN); | |
276 | if (!buf) | |
277 | die("Failed to allocate memory by zalloc."); | |
278 | if (pp->offset) { | |
279 | ret = e_snprintf(offs, 64, "+%d", pp->offset); | |
280 | if (ret <= 0) | |
281 | goto error; | |
282 | } | |
283 | if (pp->line) { | |
284 | ret = e_snprintf(line, 64, ":%d", pp->line); | |
285 | if (ret <= 0) | |
286 | goto error; | |
287 | } | |
288 | ||
289 | if (pp->function) | |
290 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s", pp->function, | |
291 | offs, pp->retprobe ? "%return" : "", line); | |
292 | else | |
84988450 | 293 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", pp->file, line); |
7ef17aaf MH |
294 | if (ret <= 0) { |
295 | error: | |
296 | free(pp->probes[0]); | |
297 | pp->probes[0] = NULL; | |
298 | } | |
299 | return ret; | |
300 | } | |
301 | ||
302 | int synthesize_perf_probe_event(struct probe_point *pp) | |
303 | { | |
304 | char *buf; | |
305 | int i, len, ret; | |
306 | ||
307 | len = synthesize_perf_probe_point(pp); | |
308 | if (len < 0) | |
309 | return 0; | |
4de189fe | 310 | |
7ef17aaf | 311 | buf = pp->probes[0]; |
4de189fe MH |
312 | for (i = 0; i < pp->nr_args; i++) { |
313 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", | |
314 | pp->args[i]); | |
315 | if (ret <= 0) | |
316 | goto error; | |
317 | len += ret; | |
318 | } | |
319 | pp->found = 1; | |
320 | ||
321 | return pp->found; | |
322 | error: | |
323 | free(pp->probes[0]); | |
7ef17aaf | 324 | pp->probes[0] = NULL; |
4de189fe MH |
325 | |
326 | return ret; | |
327 | } | |
328 | ||
50656eec MH |
329 | int synthesize_trace_kprobe_event(struct probe_point *pp) |
330 | { | |
331 | char *buf; | |
332 | int i, len, ret; | |
333 | ||
334 | pp->probes[0] = buf = zalloc(MAX_CMDLEN); | |
335 | if (!buf) | |
336 | die("Failed to allocate memory by zalloc."); | |
4de189fe MH |
337 | ret = e_snprintf(buf, MAX_CMDLEN, "%s+%d", pp->function, pp->offset); |
338 | if (ret <= 0) | |
50656eec MH |
339 | goto error; |
340 | len = ret; | |
341 | ||
342 | for (i = 0; i < pp->nr_args; i++) { | |
4de189fe MH |
343 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
344 | pp->args[i]); | |
345 | if (ret <= 0) | |
50656eec MH |
346 | goto error; |
347 | len += ret; | |
348 | } | |
349 | pp->found = 1; | |
350 | ||
351 | return pp->found; | |
352 | error: | |
353 | free(pp->probes[0]); | |
7ef17aaf | 354 | pp->probes[0] = NULL; |
50656eec MH |
355 | |
356 | return ret; | |
357 | } | |
358 | ||
4de189fe MH |
359 | static int open_kprobe_events(int flags, int mode) |
360 | { | |
361 | char buf[PATH_MAX]; | |
362 | int ret; | |
363 | ||
364 | ret = e_snprintf(buf, PATH_MAX, "%s/../kprobe_events", debugfs_path); | |
365 | if (ret < 0) | |
366 | die("Failed to make kprobe_events path."); | |
367 | ||
368 | ret = open(buf, flags, mode); | |
369 | if (ret < 0) { | |
370 | if (errno == ENOENT) | |
371 | die("kprobe_events file does not exist -" | |
63bbd5e2 | 372 | " please rebuild with CONFIG_KPROBE_EVENT."); |
4de189fe MH |
373 | else |
374 | die("Could not open kprobe_events file: %s", | |
375 | strerror(errno)); | |
376 | } | |
377 | return ret; | |
378 | } | |
379 | ||
380 | /* Get raw string list of current kprobe_events */ | |
381 | static struct strlist *get_trace_kprobe_event_rawlist(int fd) | |
382 | { | |
383 | int ret, idx; | |
384 | FILE *fp; | |
385 | char buf[MAX_CMDLEN]; | |
386 | char *p; | |
387 | struct strlist *sl; | |
388 | ||
389 | sl = strlist__new(true, NULL); | |
390 | ||
391 | fp = fdopen(dup(fd), "r"); | |
392 | while (!feof(fp)) { | |
393 | p = fgets(buf, MAX_CMDLEN, fp); | |
394 | if (!p) | |
395 | break; | |
396 | ||
397 | idx = strlen(p) - 1; | |
398 | if (p[idx] == '\n') | |
399 | p[idx] = '\0'; | |
400 | ret = strlist__add(sl, buf); | |
401 | if (ret < 0) | |
402 | die("strlist__add failed: %s", strerror(-ret)); | |
403 | } | |
404 | fclose(fp); | |
405 | ||
406 | return sl; | |
407 | } | |
408 | ||
409 | /* Free and zero clear probe_point */ | |
410 | static void clear_probe_point(struct probe_point *pp) | |
411 | { | |
412 | int i; | |
413 | ||
af663d75 MH |
414 | if (pp->event) |
415 | free(pp->event); | |
416 | if (pp->group) | |
417 | free(pp->group); | |
4de189fe MH |
418 | if (pp->function) |
419 | free(pp->function); | |
420 | if (pp->file) | |
421 | free(pp->file); | |
422 | for (i = 0; i < pp->nr_args; i++) | |
423 | free(pp->args[i]); | |
424 | if (pp->args) | |
425 | free(pp->args); | |
426 | for (i = 0; i < pp->found; i++) | |
427 | free(pp->probes[i]); | |
5660ce34 | 428 | memset(pp, 0, sizeof(*pp)); |
4de189fe MH |
429 | } |
430 | ||
278498d4 | 431 | /* Show an event */ |
af663d75 MH |
432 | static void show_perf_probe_event(const char *event, const char *place, |
433 | struct probe_point *pp) | |
278498d4 | 434 | { |
7e990a51 | 435 | int i, ret; |
278498d4 MH |
436 | char buf[128]; |
437 | ||
af663d75 | 438 | ret = e_snprintf(buf, 128, "%s:%s", pp->group, event); |
7e990a51 MH |
439 | if (ret < 0) |
440 | die("Failed to copy event: %s", strerror(-ret)); | |
278498d4 MH |
441 | printf(" %-40s (on %s", buf, place); |
442 | ||
443 | if (pp->nr_args > 0) { | |
444 | printf(" with"); | |
445 | for (i = 0; i < pp->nr_args; i++) | |
446 | printf(" %s", pp->args[i]); | |
447 | } | |
448 | printf(")\n"); | |
449 | } | |
450 | ||
4de189fe MH |
451 | /* List up current perf-probe events */ |
452 | void show_perf_probe_events(void) | |
453 | { | |
7ef17aaf | 454 | int fd; |
4de189fe MH |
455 | struct probe_point pp; |
456 | struct strlist *rawlist; | |
457 | struct str_node *ent; | |
458 | ||
72041334 MH |
459 | setup_pager(); |
460 | ||
4de189fe MH |
461 | fd = open_kprobe_events(O_RDONLY, 0); |
462 | rawlist = get_trace_kprobe_event_rawlist(fd); | |
463 | close(fd); | |
464 | ||
adf365f4 | 465 | strlist__for_each(ent, rawlist) { |
af663d75 | 466 | parse_trace_kprobe_event(ent->s, &pp); |
278498d4 | 467 | /* Synthesize only event probe point */ |
7ef17aaf | 468 | synthesize_perf_probe_point(&pp); |
278498d4 | 469 | /* Show an event */ |
af663d75 | 470 | show_perf_probe_event(pp.event, pp.probes[0], &pp); |
4de189fe MH |
471 | clear_probe_point(&pp); |
472 | } | |
473 | ||
474 | strlist__delete(rawlist); | |
475 | } | |
476 | ||
b498ce1f | 477 | /* Get current perf-probe event names */ |
fa28244d | 478 | static struct strlist *get_perf_event_names(int fd, bool include_group) |
b498ce1f | 479 | { |
fa28244d | 480 | char buf[128]; |
b498ce1f MH |
481 | struct strlist *sl, *rawlist; |
482 | struct str_node *ent; | |
af663d75 | 483 | struct probe_point pp; |
b498ce1f | 484 | |
af663d75 | 485 | memset(&pp, 0, sizeof(pp)); |
b498ce1f MH |
486 | rawlist = get_trace_kprobe_event_rawlist(fd); |
487 | ||
e1d2017b | 488 | sl = strlist__new(true, NULL); |
adf365f4 | 489 | strlist__for_each(ent, rawlist) { |
af663d75 | 490 | parse_trace_kprobe_event(ent->s, &pp); |
fa28244d | 491 | if (include_group) { |
af663d75 MH |
492 | if (e_snprintf(buf, 128, "%s:%s", pp.group, |
493 | pp.event) < 0) | |
fa28244d MH |
494 | die("Failed to copy group:event name."); |
495 | strlist__add(sl, buf); | |
496 | } else | |
af663d75 MH |
497 | strlist__add(sl, pp.event); |
498 | clear_probe_point(&pp); | |
b498ce1f MH |
499 | } |
500 | ||
501 | strlist__delete(rawlist); | |
502 | ||
503 | return sl; | |
504 | } | |
505 | ||
a9b495b0 | 506 | static void write_trace_kprobe_event(int fd, const char *buf) |
50656eec MH |
507 | { |
508 | int ret; | |
509 | ||
fa28244d | 510 | pr_debug("Writing event: %s\n", buf); |
50656eec MH |
511 | ret = write(fd, buf, strlen(buf)); |
512 | if (ret <= 0) | |
fa28244d | 513 | die("Failed to write event: %s", strerror(errno)); |
50656eec MH |
514 | } |
515 | ||
b498ce1f | 516 | static void get_new_event_name(char *buf, size_t len, const char *base, |
d761b08b | 517 | struct strlist *namelist, bool allow_suffix) |
b498ce1f MH |
518 | { |
519 | int i, ret; | |
17f88fcd MH |
520 | |
521 | /* Try no suffix */ | |
522 | ret = e_snprintf(buf, len, "%s", base); | |
523 | if (ret < 0) | |
524 | die("snprintf() failed: %s", strerror(-ret)); | |
525 | if (!strlist__has_entry(namelist, buf)) | |
526 | return; | |
527 | ||
d761b08b MH |
528 | if (!allow_suffix) { |
529 | pr_warning("Error: event \"%s\" already exists. " | |
530 | "(Use -f to force duplicates.)\n", base); | |
531 | die("Can't add new event."); | |
532 | } | |
533 | ||
17f88fcd MH |
534 | /* Try to add suffix */ |
535 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f MH |
536 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
537 | if (ret < 0) | |
538 | die("snprintf() failed: %s", strerror(-ret)); | |
539 | if (!strlist__has_entry(namelist, buf)) | |
540 | break; | |
541 | } | |
542 | if (i == MAX_EVENT_INDEX) | |
543 | die("Too many events are on the same function."); | |
544 | } | |
545 | ||
d761b08b MH |
546 | void add_trace_kprobe_events(struct probe_point *probes, int nr_probes, |
547 | bool force_add) | |
50656eec MH |
548 | { |
549 | int i, j, fd; | |
550 | struct probe_point *pp; | |
551 | char buf[MAX_CMDLEN]; | |
b498ce1f MH |
552 | char event[64]; |
553 | struct strlist *namelist; | |
d761b08b | 554 | bool allow_suffix; |
50656eec | 555 | |
b498ce1f MH |
556 | fd = open_kprobe_events(O_RDWR, O_APPEND); |
557 | /* Get current event names */ | |
fa28244d | 558 | namelist = get_perf_event_names(fd, false); |
50656eec MH |
559 | |
560 | for (j = 0; j < nr_probes; j++) { | |
561 | pp = probes + j; | |
af663d75 MH |
562 | if (!pp->event) |
563 | pp->event = strdup(pp->function); | |
564 | if (!pp->group) | |
565 | pp->group = strdup(PERFPROBE_GROUP); | |
566 | DIE_IF(!pp->event || !pp->group); | |
d761b08b MH |
567 | /* If force_add is true, suffix search is allowed */ |
568 | allow_suffix = force_add; | |
b498ce1f MH |
569 | for (i = 0; i < pp->found; i++) { |
570 | /* Get an unused new event name */ | |
d761b08b MH |
571 | get_new_event_name(event, 64, pp->event, namelist, |
572 | allow_suffix); | |
b498ce1f MH |
573 | snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s\n", |
574 | pp->retprobe ? 'r' : 'p', | |
af663d75 | 575 | pp->group, event, |
b498ce1f | 576 | pp->probes[i]); |
50656eec | 577 | write_trace_kprobe_event(fd, buf); |
a9b495b0 MH |
578 | printf("Added new event:\n"); |
579 | /* Get the first parameter (probe-point) */ | |
580 | sscanf(pp->probes[i], "%s", buf); | |
af663d75 | 581 | show_perf_probe_event(event, buf, pp); |
b498ce1f MH |
582 | /* Add added event name to namelist */ |
583 | strlist__add(namelist, event); | |
d761b08b MH |
584 | /* |
585 | * Probes after the first probe which comes from same | |
586 | * user input are always allowed to add suffix, because | |
587 | * there might be several addresses corresponding to | |
588 | * one code line. | |
589 | */ | |
590 | allow_suffix = true; | |
b498ce1f | 591 | } |
50656eec | 592 | } |
a9b495b0 MH |
593 | /* Show how to use the event. */ |
594 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
595 | printf("\tperf record -e %s:%s -a sleep 1\n\n", PERFPROBE_GROUP, event); | |
596 | ||
e1d2017b | 597 | strlist__delete(namelist); |
50656eec MH |
598 | close(fd); |
599 | } | |
fa28244d | 600 | |
bbbb521b MH |
601 | static void __del_trace_kprobe_event(int fd, struct str_node *ent) |
602 | { | |
603 | char *p; | |
604 | char buf[128]; | |
605 | ||
606 | /* Convert from perf-probe event to trace-kprobe event */ | |
607 | if (e_snprintf(buf, 128, "-:%s", ent->s) < 0) | |
608 | die("Failed to copy event."); | |
609 | p = strchr(buf + 2, ':'); | |
610 | if (!p) | |
611 | die("Internal error: %s should have ':' but not.", ent->s); | |
612 | *p = '/'; | |
613 | ||
614 | write_trace_kprobe_event(fd, buf); | |
615 | printf("Remove event: %s\n", ent->s); | |
616 | } | |
617 | ||
fa28244d MH |
618 | static void del_trace_kprobe_event(int fd, const char *group, |
619 | const char *event, struct strlist *namelist) | |
620 | { | |
621 | char buf[128]; | |
bbbb521b MH |
622 | struct str_node *ent, *n; |
623 | int found = 0; | |
fa28244d MH |
624 | |
625 | if (e_snprintf(buf, 128, "%s:%s", group, event) < 0) | |
626 | die("Failed to copy event."); | |
fa28244d | 627 | |
bbbb521b MH |
628 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
629 | strlist__for_each_safe(ent, n, namelist) | |
630 | if (strglobmatch(ent->s, buf)) { | |
631 | found++; | |
632 | __del_trace_kprobe_event(fd, ent); | |
633 | strlist__remove(namelist, ent); | |
634 | } | |
635 | } else { | |
636 | ent = strlist__find(namelist, buf); | |
637 | if (ent) { | |
638 | found++; | |
639 | __del_trace_kprobe_event(fd, ent); | |
640 | strlist__remove(namelist, ent); | |
641 | } | |
642 | } | |
643 | if (found == 0) | |
644 | pr_info("Info: event \"%s\" does not exist, could not remove it.\n", buf); | |
fa28244d MH |
645 | } |
646 | ||
647 | void del_trace_kprobe_events(struct strlist *dellist) | |
648 | { | |
649 | int fd; | |
fa28244d MH |
650 | const char *group, *event; |
651 | char *p, *str; | |
652 | struct str_node *ent; | |
653 | struct strlist *namelist; | |
654 | ||
655 | fd = open_kprobe_events(O_RDWR, O_APPEND); | |
656 | /* Get current event names */ | |
657 | namelist = get_perf_event_names(fd, true); | |
658 | ||
adf365f4 | 659 | strlist__for_each(ent, dellist) { |
fa28244d MH |
660 | str = strdup(ent->s); |
661 | if (!str) | |
662 | die("Failed to copy event."); | |
bbbb521b | 663 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
664 | p = strchr(str, ':'); |
665 | if (p) { | |
666 | group = str; | |
667 | *p = '\0'; | |
668 | event = p + 1; | |
669 | } else { | |
bbbb521b | 670 | group = "*"; |
fa28244d MH |
671 | event = str; |
672 | } | |
bbbb521b | 673 | pr_debug("Group: %s, Event: %s\n", group, event); |
fa28244d MH |
674 | del_trace_kprobe_event(fd, group, event, namelist); |
675 | free(str); | |
676 | } | |
677 | strlist__delete(namelist); | |
678 | close(fd); | |
679 | } | |
680 |