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 | |
31facc5f | 36 | #include "util.h" |
50656eec | 37 | #include "event.h" |
e1c01d61 | 38 | #include "string.h" |
4de189fe | 39 | #include "strlist.h" |
50656eec | 40 | #include "debug.h" |
72041334 | 41 | #include "cache.h" |
631c9def | 42 | #include "color.h" |
e0faa8d3 MH |
43 | #include "symbol.h" |
44 | #include "thread.h" | |
7ca5989d | 45 | #include "debugfs.h" |
4b4da7f7 | 46 | #include "trace-event.h" /* For __unused */ |
50656eec | 47 | #include "probe-event.h" |
4235b045 | 48 | #include "probe-finder.h" |
50656eec MH |
49 | |
50 | #define MAX_CMDLEN 256 | |
51 | #define MAX_PROBE_ARGS 128 | |
52 | #define PERFPROBE_GROUP "probe" | |
53 | ||
f4d7da49 MH |
54 | bool probe_event_dry_run; /* Dry run flag */ |
55 | ||
146a1439 | 56 | #define semantic_error(msg ...) pr_err("Semantic error :" msg) |
50656eec | 57 | |
4de189fe | 58 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
59 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
60 | __attribute__((format(printf, 3, 4))); | |
61 | ||
4de189fe MH |
62 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
63 | { | |
64 | int ret; | |
65 | va_list ap; | |
66 | va_start(ap, format); | |
67 | ret = vsnprintf(str, size, format, ap); | |
68 | va_end(ap); | |
69 | if (ret >= (int)size) | |
70 | ret = -E2BIG; | |
71 | return ret; | |
72 | } | |
73 | ||
4b4da7f7 | 74 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp); |
e0faa8d3 MH |
75 | static struct map_groups kmap_groups; |
76 | static struct map *kmaps[MAP__NR_TYPES]; | |
77 | ||
4b4da7f7 | 78 | /* Initialize symbol maps and path of vmlinux */ |
146a1439 | 79 | static int init_vmlinux(void) |
e0faa8d3 | 80 | { |
146a1439 MH |
81 | int ret; |
82 | ||
e0faa8d3 MH |
83 | symbol_conf.sort_by_name = true; |
84 | if (symbol_conf.vmlinux_name == NULL) | |
85 | symbol_conf.try_vmlinux_path = true; | |
86 | else | |
87 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
146a1439 MH |
88 | ret = symbol__init(); |
89 | if (ret < 0) { | |
90 | pr_debug("Failed to init symbol map.\n"); | |
91 | goto out; | |
92 | } | |
e0faa8d3 MH |
93 | |
94 | map_groups__init(&kmap_groups); | |
146a1439 MH |
95 | ret = map_groups__create_kernel_maps(&kmap_groups, kmaps); |
96 | if (ret < 0) | |
97 | pr_debug("Failed to create kernel maps.\n"); | |
98 | ||
99 | out: | |
100 | if (ret < 0) | |
101 | pr_warning("Failed to init vmlinux path.\n"); | |
102 | return ret; | |
e0faa8d3 MH |
103 | } |
104 | ||
4b4da7f7 | 105 | #ifdef DWARF_SUPPORT |
e0faa8d3 MH |
106 | static int open_vmlinux(void) |
107 | { | |
108 | if (map__load(kmaps[MAP__FUNCTION], NULL) < 0) { | |
109 | pr_debug("Failed to load kernel map.\n"); | |
110 | return -EINVAL; | |
111 | } | |
112 | pr_debug("Try to open %s\n", kmaps[MAP__FUNCTION]->dso->long_name); | |
113 | return open(kmaps[MAP__FUNCTION]->dso->long_name, O_RDONLY); | |
114 | } | |
4b4da7f7 | 115 | |
146a1439 MH |
116 | /* Convert trace point to probe point with debuginfo */ |
117 | static int convert_to_perf_probe_point(struct kprobe_trace_point *tp, | |
118 | struct perf_probe_point *pp) | |
4b4da7f7 MH |
119 | { |
120 | struct symbol *sym; | |
146a1439 | 121 | int fd, ret = -ENOENT; |
4b4da7f7 MH |
122 | |
123 | sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION], | |
124 | tp->symbol, NULL); | |
125 | if (sym) { | |
126 | fd = open_vmlinux(); | |
146a1439 MH |
127 | if (fd >= 0) { |
128 | ret = find_perf_probe_point(fd, | |
129 | sym->start + tp->offset, pp); | |
130 | close(fd); | |
131 | } | |
4b4da7f7 MH |
132 | } |
133 | if (ret <= 0) { | |
146a1439 MH |
134 | pr_debug("Failed to find corresponding probes from " |
135 | "debuginfo. Use kprobe event information.\n"); | |
02b95dad MH |
136 | pp->function = strdup(tp->symbol); |
137 | if (pp->function == NULL) | |
138 | return -ENOMEM; | |
4b4da7f7 MH |
139 | pp->offset = tp->offset; |
140 | } | |
141 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
142 | |
143 | return 0; | |
4b4da7f7 MH |
144 | } |
145 | ||
146 | /* Try to find perf_probe_event with debuginfo */ | |
147 | static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, | |
148 | struct kprobe_trace_event **tevs) | |
149 | { | |
150 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
151 | int fd, ntevs; | |
152 | ||
153 | fd = open_vmlinux(); | |
154 | if (fd < 0) { | |
146a1439 MH |
155 | if (need_dwarf) { |
156 | pr_warning("Failed to open debuginfo file.\n"); | |
157 | return fd; | |
158 | } | |
4b4da7f7 MH |
159 | pr_debug("Could not open vmlinux. Try to use symbols.\n"); |
160 | return 0; | |
161 | } | |
162 | ||
163 | /* Searching trace events corresponding to probe event */ | |
164 | ntevs = find_kprobe_trace_events(fd, pev, tevs); | |
165 | close(fd); | |
166 | ||
146a1439 MH |
167 | if (ntevs > 0) { /* Succeeded to find trace events */ |
168 | pr_debug("find %d kprobe_trace_events.\n", ntevs); | |
4b4da7f7 | 169 | return ntevs; |
146a1439 | 170 | } |
4b4da7f7 | 171 | |
146a1439 MH |
172 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
173 | pr_warning("Probe point '%s' not found.\n", | |
174 | synthesize_perf_probe_point(&pev->point)); | |
175 | return -ENOENT; | |
176 | } | |
177 | /* Error path : ntevs < 0 */ | |
4b4da7f7 | 178 | if (need_dwarf) { |
b55a87ad | 179 | if (ntevs == -EBADF) |
4b4da7f7 MH |
180 | pr_warning("No dwarf info found in the vmlinux - " |
181 | "please rebuild with CONFIG_DEBUG_INFO=y.\n"); | |
146a1439 | 182 | return ntevs; |
4b4da7f7 MH |
183 | } |
184 | pr_debug("An error occurred in debuginfo analysis." | |
185 | " Try to use symbols.\n"); | |
186 | return 0; | |
4b4da7f7 MH |
187 | } |
188 | ||
189 | #define LINEBUF_SIZE 256 | |
190 | #define NR_ADDITIONAL_LINES 2 | |
191 | ||
146a1439 | 192 | static int show_one_line(FILE *fp, unsigned int l, bool skip, bool show_num) |
4b4da7f7 MH |
193 | { |
194 | char buf[LINEBUF_SIZE]; | |
195 | const char *color = PERF_COLOR_BLUE; | |
196 | ||
197 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
198 | goto error; | |
199 | if (!skip) { | |
200 | if (show_num) | |
201 | fprintf(stdout, "%7u %s", l, buf); | |
202 | else | |
203 | color_fprintf(stdout, color, " %s", buf); | |
204 | } | |
205 | ||
206 | while (strlen(buf) == LINEBUF_SIZE - 1 && | |
207 | buf[LINEBUF_SIZE - 2] != '\n') { | |
208 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
209 | goto error; | |
210 | if (!skip) { | |
211 | if (show_num) | |
212 | fprintf(stdout, "%s", buf); | |
213 | else | |
214 | color_fprintf(stdout, color, "%s", buf); | |
215 | } | |
216 | } | |
146a1439 MH |
217 | |
218 | return 0; | |
4b4da7f7 MH |
219 | error: |
220 | if (feof(fp)) | |
146a1439 | 221 | pr_warning("Source file is shorter than expected.\n"); |
4b4da7f7 | 222 | else |
146a1439 MH |
223 | pr_warning("File read error: %s\n", strerror(errno)); |
224 | ||
225 | return -1; | |
4b4da7f7 MH |
226 | } |
227 | ||
228 | /* | |
229 | * Show line-range always requires debuginfo to find source file and | |
230 | * line number. | |
231 | */ | |
146a1439 | 232 | int show_line_range(struct line_range *lr) |
4b4da7f7 MH |
233 | { |
234 | unsigned int l = 1; | |
235 | struct line_node *ln; | |
236 | FILE *fp; | |
237 | int fd, ret; | |
238 | ||
239 | /* Search a line range */ | |
146a1439 MH |
240 | ret = init_vmlinux(); |
241 | if (ret < 0) | |
242 | return ret; | |
243 | ||
4b4da7f7 | 244 | fd = open_vmlinux(); |
146a1439 MH |
245 | if (fd < 0) { |
246 | pr_warning("Failed to open debuginfo file.\n"); | |
247 | return fd; | |
248 | } | |
249 | ||
4b4da7f7 | 250 | ret = find_line_range(fd, lr); |
4b4da7f7 | 251 | close(fd); |
146a1439 MH |
252 | if (ret == 0) { |
253 | pr_warning("Specified source line is not found.\n"); | |
254 | return -ENOENT; | |
255 | } else if (ret < 0) { | |
256 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
257 | return ret; | |
258 | } | |
4b4da7f7 MH |
259 | |
260 | setup_pager(); | |
261 | ||
262 | if (lr->function) | |
263 | fprintf(stdout, "<%s:%d>\n", lr->function, | |
264 | lr->start - lr->offset); | |
265 | else | |
266 | fprintf(stdout, "<%s:%d>\n", lr->file, lr->start); | |
267 | ||
268 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
269 | if (fp == NULL) { |
270 | pr_warning("Failed to open %s: %s\n", lr->path, | |
271 | strerror(errno)); | |
272 | return -errno; | |
273 | } | |
4b4da7f7 | 274 | /* Skip to starting line number */ |
146a1439 MH |
275 | while (l < lr->start && ret >= 0) |
276 | ret = show_one_line(fp, l++, true, false); | |
277 | if (ret < 0) | |
278 | goto end; | |
4b4da7f7 MH |
279 | |
280 | list_for_each_entry(ln, &lr->line_list, list) { | |
146a1439 MH |
281 | while (ln->line > l && ret >= 0) |
282 | ret = show_one_line(fp, (l++) - lr->offset, | |
283 | false, false); | |
284 | if (ret >= 0) | |
285 | ret = show_one_line(fp, (l++) - lr->offset, | |
286 | false, true); | |
287 | if (ret < 0) | |
288 | goto end; | |
4b4da7f7 MH |
289 | } |
290 | ||
291 | if (lr->end == INT_MAX) | |
292 | lr->end = l + NR_ADDITIONAL_LINES; | |
146a1439 MH |
293 | while (l < lr->end && !feof(fp) && ret >= 0) |
294 | ret = show_one_line(fp, (l++) - lr->offset, false, false); | |
295 | end: | |
4b4da7f7 | 296 | fclose(fp); |
146a1439 | 297 | return ret; |
4b4da7f7 MH |
298 | } |
299 | ||
300 | #else /* !DWARF_SUPPORT */ | |
301 | ||
146a1439 | 302 | static int convert_to_perf_probe_point(struct kprobe_trace_point *tp, |
4b4da7f7 MH |
303 | struct perf_probe_point *pp) |
304 | { | |
02b95dad MH |
305 | pp->function = strdup(tp->symbol); |
306 | if (pp->function == NULL) | |
307 | return -ENOMEM; | |
4b4da7f7 MH |
308 | pp->offset = tp->offset; |
309 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
310 | |
311 | return 0; | |
4b4da7f7 MH |
312 | } |
313 | ||
314 | static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, | |
315 | struct kprobe_trace_event **tevs __unused) | |
316 | { | |
146a1439 MH |
317 | if (perf_probe_event_need_dwarf(pev)) { |
318 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
319 | return -ENOSYS; | |
320 | } | |
4b4da7f7 MH |
321 | return 0; |
322 | } | |
323 | ||
146a1439 | 324 | int show_line_range(struct line_range *lr __unused) |
4b4da7f7 | 325 | { |
146a1439 MH |
326 | pr_warning("Debuginfo-analysis is not supported.\n"); |
327 | return -ENOSYS; | |
4b4da7f7 MH |
328 | } |
329 | ||
e0faa8d3 MH |
330 | #endif |
331 | ||
146a1439 | 332 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def MH |
333 | { |
334 | const char *ptr; | |
335 | char *tmp; | |
336 | /* | |
337 | * <Syntax> | |
338 | * SRC:SLN[+NUM|-ELN] | |
339 | * FUNC[:SLN[+NUM|-ELN]] | |
340 | */ | |
341 | ptr = strchr(arg, ':'); | |
342 | if (ptr) { | |
343 | lr->start = (unsigned int)strtoul(ptr + 1, &tmp, 0); | |
344 | if (*tmp == '+') | |
345 | lr->end = lr->start + (unsigned int)strtoul(tmp + 1, | |
346 | &tmp, 0); | |
347 | else if (*tmp == '-') | |
348 | lr->end = (unsigned int)strtoul(tmp + 1, &tmp, 0); | |
349 | else | |
350 | lr->end = 0; | |
351 | pr_debug("Line range is %u to %u\n", lr->start, lr->end); | |
146a1439 | 352 | if (lr->end && lr->start > lr->end) { |
631c9def | 353 | semantic_error("Start line must be smaller" |
146a1439 MH |
354 | " than end line.\n"); |
355 | return -EINVAL; | |
356 | } | |
357 | if (*tmp != '\0') { | |
358 | semantic_error("Tailing with invalid character '%d'.\n", | |
631c9def | 359 | *tmp); |
146a1439 MH |
360 | return -EINVAL; |
361 | } | |
02b95dad | 362 | tmp = strndup(arg, (ptr - arg)); |
631c9def | 363 | } else |
02b95dad MH |
364 | tmp = strdup(arg); |
365 | ||
366 | if (tmp == NULL) | |
367 | return -ENOMEM; | |
631c9def MH |
368 | |
369 | if (strchr(tmp, '.')) | |
370 | lr->file = tmp; | |
371 | else | |
372 | lr->function = tmp; | |
146a1439 MH |
373 | |
374 | return 0; | |
631c9def MH |
375 | } |
376 | ||
b7702a21 MH |
377 | /* Check the name is good for event/group */ |
378 | static bool check_event_name(const char *name) | |
379 | { | |
380 | if (!isalpha(*name) && *name != '_') | |
381 | return false; | |
382 | while (*++name != '\0') { | |
383 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
384 | return false; | |
385 | } | |
386 | return true; | |
387 | } | |
388 | ||
50656eec | 389 | /* Parse probepoint definition. */ |
146a1439 | 390 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 391 | { |
4235b045 | 392 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
393 | char *ptr, *tmp; |
394 | char c, nc = 0; | |
395 | /* | |
396 | * <Syntax> | |
2a9c8c36 MH |
397 | * perf probe [EVENT=]SRC[:LN|;PTN] |
398 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
399 | * |
400 | * TODO:Group name support | |
50656eec MH |
401 | */ |
402 | ||
2a9c8c36 MH |
403 | ptr = strpbrk(arg, ";=@+%"); |
404 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
405 | *ptr = '\0'; |
406 | tmp = ptr + 1; | |
146a1439 MH |
407 | if (strchr(arg, ':')) { |
408 | semantic_error("Group name is not supported yet.\n"); | |
409 | return -ENOTSUP; | |
410 | } | |
411 | if (!check_event_name(arg)) { | |
b7702a21 | 412 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
413 | "follow C symbol-naming rule.\n", arg); |
414 | return -EINVAL; | |
415 | } | |
02b95dad MH |
416 | pev->event = strdup(arg); |
417 | if (pev->event == NULL) | |
418 | return -ENOMEM; | |
4235b045 | 419 | pev->group = NULL; |
af663d75 MH |
420 | arg = tmp; |
421 | } | |
422 | ||
2a9c8c36 | 423 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
424 | if (ptr) { |
425 | nc = *ptr; | |
426 | *ptr++ = '\0'; | |
427 | } | |
428 | ||
02b95dad MH |
429 | tmp = strdup(arg); |
430 | if (tmp == NULL) | |
431 | return -ENOMEM; | |
432 | ||
50656eec | 433 | /* Check arg is function or file and copy it */ |
02b95dad MH |
434 | if (strchr(tmp, '.')) /* File */ |
435 | pp->file = tmp; | |
50656eec | 436 | else /* Function */ |
02b95dad | 437 | pp->function = tmp; |
50656eec MH |
438 | |
439 | /* Parse other options */ | |
440 | while (ptr) { | |
441 | arg = ptr; | |
442 | c = nc; | |
2a9c8c36 | 443 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
444 | pp->lazy_line = strdup(arg); |
445 | if (pp->lazy_line == NULL) | |
446 | return -ENOMEM; | |
2a9c8c36 MH |
447 | break; |
448 | } | |
449 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
450 | if (ptr) { |
451 | nc = *ptr; | |
452 | *ptr++ = '\0'; | |
453 | } | |
454 | switch (c) { | |
455 | case ':': /* Line number */ | |
456 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 457 | if (*tmp != '\0') { |
2a9c8c36 | 458 | semantic_error("There is non-digit char" |
146a1439 MH |
459 | " in line number.\n"); |
460 | return -EINVAL; | |
461 | } | |
50656eec MH |
462 | break; |
463 | case '+': /* Byte offset from a symbol */ | |
464 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 465 | if (*tmp != '\0') { |
2a9c8c36 | 466 | semantic_error("There is non-digit character" |
146a1439 MH |
467 | " in offset.\n"); |
468 | return -EINVAL; | |
469 | } | |
50656eec MH |
470 | break; |
471 | case '@': /* File name */ | |
146a1439 MH |
472 | if (pp->file) { |
473 | semantic_error("SRC@SRC is not allowed.\n"); | |
474 | return -EINVAL; | |
475 | } | |
02b95dad MH |
476 | pp->file = strdup(arg); |
477 | if (pp->file == NULL) | |
478 | return -ENOMEM; | |
50656eec MH |
479 | break; |
480 | case '%': /* Probe places */ | |
481 | if (strcmp(arg, "return") == 0) { | |
482 | pp->retprobe = 1; | |
146a1439 MH |
483 | } else { /* Others not supported yet */ |
484 | semantic_error("%%%s is not supported.\n", arg); | |
485 | return -ENOTSUP; | |
486 | } | |
50656eec | 487 | break; |
146a1439 MH |
488 | default: /* Buggy case */ |
489 | pr_err("This program has a bug at %s:%d.\n", | |
490 | __FILE__, __LINE__); | |
491 | return -ENOTSUP; | |
50656eec MH |
492 | break; |
493 | } | |
494 | } | |
495 | ||
496 | /* Exclusion check */ | |
146a1439 | 497 | if (pp->lazy_line && pp->line) { |
2a9c8c36 | 498 | semantic_error("Lazy pattern can't be used with line number."); |
146a1439 MH |
499 | return -EINVAL; |
500 | } | |
2a9c8c36 | 501 | |
146a1439 | 502 | if (pp->lazy_line && pp->offset) { |
2a9c8c36 | 503 | semantic_error("Lazy pattern can't be used with offset."); |
146a1439 MH |
504 | return -EINVAL; |
505 | } | |
2a9c8c36 | 506 | |
146a1439 | 507 | if (pp->line && pp->offset) { |
50656eec | 508 | semantic_error("Offset can't be used with line number."); |
146a1439 MH |
509 | return -EINVAL; |
510 | } | |
50656eec | 511 | |
146a1439 | 512 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 MH |
513 | semantic_error("File always requires line number or " |
514 | "lazy pattern."); | |
146a1439 MH |
515 | return -EINVAL; |
516 | } | |
50656eec | 517 | |
146a1439 | 518 | if (pp->offset && !pp->function) { |
50656eec | 519 | semantic_error("Offset requires an entry function."); |
146a1439 MH |
520 | return -EINVAL; |
521 | } | |
50656eec | 522 | |
146a1439 | 523 | if (pp->retprobe && !pp->function) { |
50656eec | 524 | semantic_error("Return probe requires an entry function."); |
146a1439 MH |
525 | return -EINVAL; |
526 | } | |
50656eec | 527 | |
146a1439 | 528 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 MH |
529 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
530 | "return probe."); | |
146a1439 MH |
531 | return -EINVAL; |
532 | } | |
50656eec | 533 | |
4235b045 | 534 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
535 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
536 | pp->lazy_line); | |
146a1439 | 537 | return 0; |
50656eec MH |
538 | } |
539 | ||
7df2f329 | 540 | /* Parse perf-probe event argument */ |
146a1439 | 541 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 542 | { |
48481938 | 543 | char *tmp; |
7df2f329 MH |
544 | struct perf_probe_arg_field **fieldp; |
545 | ||
546 | pr_debug("parsing arg: %s into ", str); | |
547 | ||
48481938 MH |
548 | tmp = strchr(str, '='); |
549 | if (tmp) { | |
02b95dad MH |
550 | arg->name = strndup(str, tmp - str); |
551 | if (arg->name == NULL) | |
552 | return -ENOMEM; | |
11a1ca35 | 553 | pr_debug("name:%s ", arg->name); |
48481938 MH |
554 | str = tmp + 1; |
555 | } | |
556 | ||
11a1ca35 MH |
557 | tmp = strchr(str, ':'); |
558 | if (tmp) { /* Type setting */ | |
559 | *tmp = '\0'; | |
02b95dad MH |
560 | arg->type = strdup(tmp + 1); |
561 | if (arg->type == NULL) | |
562 | return -ENOMEM; | |
11a1ca35 MH |
563 | pr_debug("type:%s ", arg->type); |
564 | } | |
565 | ||
7df2f329 MH |
566 | tmp = strpbrk(str, "-."); |
567 | if (!is_c_varname(str) || !tmp) { | |
568 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
569 | arg->var = strdup(str); |
570 | if (arg->var == NULL) | |
571 | return -ENOMEM; | |
48481938 | 572 | pr_debug("%s\n", arg->var); |
146a1439 | 573 | return 0; |
7df2f329 MH |
574 | } |
575 | ||
576 | /* Structure fields */ | |
02b95dad MH |
577 | arg->var = strndup(str, tmp - str); |
578 | if (arg->var == NULL) | |
579 | return -ENOMEM; | |
48481938 | 580 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
581 | fieldp = &arg->field; |
582 | ||
583 | do { | |
e334016f MH |
584 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
585 | if (*fieldp == NULL) | |
586 | return -ENOMEM; | |
7df2f329 MH |
587 | if (*tmp == '.') { |
588 | str = tmp + 1; | |
589 | (*fieldp)->ref = false; | |
590 | } else if (tmp[1] == '>') { | |
591 | str = tmp + 2; | |
592 | (*fieldp)->ref = true; | |
146a1439 MH |
593 | } else { |
594 | semantic_error("Argument parse error: %s\n", str); | |
595 | return -EINVAL; | |
596 | } | |
7df2f329 MH |
597 | |
598 | tmp = strpbrk(str, "-."); | |
599 | if (tmp) { | |
02b95dad MH |
600 | (*fieldp)->name = strndup(str, tmp - str); |
601 | if ((*fieldp)->name == NULL) | |
602 | return -ENOMEM; | |
7df2f329 MH |
603 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
604 | fieldp = &(*fieldp)->next; | |
605 | } | |
606 | } while (tmp); | |
02b95dad MH |
607 | (*fieldp)->name = strdup(str); |
608 | if ((*fieldp)->name == NULL) | |
609 | return -ENOMEM; | |
7df2f329 | 610 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b MH |
611 | |
612 | /* If no name is specified, set the last field name */ | |
02b95dad MH |
613 | if (!arg->name) { |
614 | arg->name = strdup((*fieldp)->name); | |
615 | if (arg->name == NULL) | |
616 | return -ENOMEM; | |
617 | } | |
146a1439 | 618 | return 0; |
7df2f329 MH |
619 | } |
620 | ||
4235b045 | 621 | /* Parse perf-probe event command */ |
146a1439 | 622 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 623 | { |
e1c01d61 | 624 | char **argv; |
146a1439 | 625 | int argc, i, ret = 0; |
fac13fd5 | 626 | |
4235b045 | 627 | argv = argv_split(cmd, &argc); |
146a1439 MH |
628 | if (!argv) { |
629 | pr_debug("Failed to split arguments.\n"); | |
630 | return -ENOMEM; | |
631 | } | |
632 | if (argc - 1 > MAX_PROBE_ARGS) { | |
633 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
634 | ret = -ERANGE; | |
635 | goto out; | |
636 | } | |
50656eec | 637 | /* Parse probe point */ |
146a1439 MH |
638 | ret = parse_perf_probe_point(argv[0], pev); |
639 | if (ret < 0) | |
640 | goto out; | |
50656eec | 641 | |
e1c01d61 | 642 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 643 | pev->nargs = argc - 1; |
e334016f MH |
644 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
645 | if (pev->args == NULL) { | |
646 | ret = -ENOMEM; | |
647 | goto out; | |
648 | } | |
146a1439 MH |
649 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
650 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
651 | if (ret >= 0 && | |
652 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 653 | semantic_error("You can't specify local variable for" |
146a1439 MH |
654 | " kretprobe.\n"); |
655 | ret = -EINVAL; | |
656 | } | |
e1c01d61 | 657 | } |
146a1439 | 658 | out: |
e1c01d61 | 659 | argv_free(argv); |
146a1439 MH |
660 | |
661 | return ret; | |
50656eec MH |
662 | } |
663 | ||
4235b045 MH |
664 | /* Return true if this perf_probe_event requires debuginfo */ |
665 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
666 | { | |
667 | int i; | |
668 | ||
669 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
670 | return true; | |
671 | ||
672 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 673 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
674 | return true; |
675 | ||
676 | return false; | |
677 | } | |
678 | ||
4de189fe | 679 | /* Parse kprobe_events event into struct probe_point */ |
146a1439 | 680 | int parse_kprobe_trace_command(const char *cmd, struct kprobe_trace_event *tev) |
4de189fe | 681 | { |
4235b045 | 682 | struct kprobe_trace_point *tp = &tev->point; |
4de189fe MH |
683 | char pr; |
684 | char *p; | |
685 | int ret, i, argc; | |
686 | char **argv; | |
687 | ||
4235b045 MH |
688 | pr_debug("Parsing kprobe_events: %s\n", cmd); |
689 | argv = argv_split(cmd, &argc); | |
146a1439 MH |
690 | if (!argv) { |
691 | pr_debug("Failed to split arguments.\n"); | |
692 | return -ENOMEM; | |
693 | } | |
694 | if (argc < 2) { | |
695 | semantic_error("Too few probe arguments.\n"); | |
696 | ret = -ERANGE; | |
697 | goto out; | |
698 | } | |
4de189fe MH |
699 | |
700 | /* Scan event and group name. */ | |
93aaa45a | 701 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
702 | &pr, (float *)(void *)&tev->group, |
703 | (float *)(void *)&tev->event); | |
146a1439 MH |
704 | if (ret != 3) { |
705 | semantic_error("Failed to parse event name: %s\n", argv[0]); | |
706 | ret = -EINVAL; | |
707 | goto out; | |
708 | } | |
4235b045 | 709 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 710 | |
4235b045 | 711 | tp->retprobe = (pr == 'r'); |
4de189fe MH |
712 | |
713 | /* Scan function name and offset */ | |
4235b045 MH |
714 | ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol, |
715 | &tp->offset); | |
4de189fe | 716 | if (ret == 1) |
4235b045 | 717 | tp->offset = 0; |
4de189fe | 718 | |
4235b045 | 719 | tev->nargs = argc - 2; |
e334016f MH |
720 | tev->args = zalloc(sizeof(struct kprobe_trace_arg) * tev->nargs); |
721 | if (tev->args == NULL) { | |
722 | ret = -ENOMEM; | |
723 | goto out; | |
724 | } | |
4235b045 | 725 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
726 | p = strchr(argv[i + 2], '='); |
727 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
728 | *p++ = '\0'; |
729 | else | |
730 | p = argv[i + 2]; | |
02b95dad | 731 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 732 | /* TODO: parse regs and offset */ |
02b95dad MH |
733 | tev->args[i].value = strdup(p); |
734 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
735 | ret = -ENOMEM; | |
736 | goto out; | |
737 | } | |
4de189fe | 738 | } |
146a1439 MH |
739 | ret = 0; |
740 | out: | |
4de189fe | 741 | argv_free(argv); |
146a1439 | 742 | return ret; |
4de189fe MH |
743 | } |
744 | ||
7df2f329 MH |
745 | /* Compose only probe arg */ |
746 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
747 | { | |
748 | struct perf_probe_arg_field *field = pa->field; | |
749 | int ret; | |
750 | char *tmp = buf; | |
751 | ||
48481938 MH |
752 | if (pa->name && pa->var) |
753 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
754 | else | |
755 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
756 | if (ret <= 0) |
757 | goto error; | |
758 | tmp += ret; | |
759 | len -= ret; | |
760 | ||
761 | while (field) { | |
762 | ret = e_snprintf(tmp, len, "%s%s", field->ref ? "->" : ".", | |
763 | field->name); | |
764 | if (ret <= 0) | |
765 | goto error; | |
766 | tmp += ret; | |
767 | len -= ret; | |
768 | field = field->next; | |
769 | } | |
11a1ca35 MH |
770 | |
771 | if (pa->type) { | |
772 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
773 | if (ret <= 0) | |
774 | goto error; | |
775 | tmp += ret; | |
776 | len -= ret; | |
777 | } | |
778 | ||
7df2f329 MH |
779 | return tmp - buf; |
780 | error: | |
146a1439 MH |
781 | pr_debug("Failed to synthesize perf probe argument: %s", |
782 | strerror(-ret)); | |
783 | return ret; | |
7df2f329 MH |
784 | } |
785 | ||
4235b045 MH |
786 | /* Compose only probe point (not argument) */ |
787 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 788 | { |
fb1587d8 MH |
789 | char *buf, *tmp; |
790 | char offs[32] = "", line[32] = "", file[32] = ""; | |
791 | int ret, len; | |
4de189fe | 792 | |
e334016f MH |
793 | buf = zalloc(MAX_CMDLEN); |
794 | if (buf == NULL) { | |
795 | ret = -ENOMEM; | |
796 | goto error; | |
797 | } | |
4de189fe | 798 | if (pp->offset) { |
fb1587d8 | 799 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
800 | if (ret <= 0) |
801 | goto error; | |
802 | } | |
803 | if (pp->line) { | |
fb1587d8 MH |
804 | ret = e_snprintf(line, 32, ":%d", pp->line); |
805 | if (ret <= 0) | |
806 | goto error; | |
807 | } | |
808 | if (pp->file) { | |
dd259c5d | 809 | len = strlen(pp->file) - 31; |
fb1587d8 MH |
810 | if (len < 0) |
811 | len = 0; | |
812 | tmp = strchr(pp->file + len, '/'); | |
813 | if (!tmp) | |
dd259c5d | 814 | tmp = pp->file + len; |
fb1587d8 | 815 | ret = e_snprintf(file, 32, "@%s", tmp + 1); |
4de189fe MH |
816 | if (ret <= 0) |
817 | goto error; | |
818 | } | |
819 | ||
820 | if (pp->function) | |
fb1587d8 MH |
821 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
822 | offs, pp->retprobe ? "%return" : "", line, | |
823 | file); | |
4de189fe | 824 | else |
fb1587d8 | 825 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
826 | if (ret <= 0) |
827 | goto error; | |
828 | ||
829 | return buf; | |
7ef17aaf | 830 | error: |
146a1439 MH |
831 | pr_debug("Failed to synthesize perf probe point: %s", |
832 | strerror(-ret)); | |
e334016f MH |
833 | if (buf) |
834 | free(buf); | |
146a1439 | 835 | return NULL; |
7ef17aaf MH |
836 | } |
837 | ||
4235b045 MH |
838 | #if 0 |
839 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
840 | { |
841 | char *buf; | |
842 | int i, len, ret; | |
843 | ||
4235b045 MH |
844 | buf = synthesize_perf_probe_point(&pev->point); |
845 | if (!buf) | |
846 | return NULL; | |
4de189fe | 847 | |
4235b045 MH |
848 | len = strlen(buf); |
849 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 850 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
851 | pev->args[i].name); |
852 | if (ret <= 0) { | |
853 | free(buf); | |
854 | return NULL; | |
855 | } | |
4de189fe MH |
856 | len += ret; |
857 | } | |
4de189fe | 858 | |
4235b045 MH |
859 | return buf; |
860 | } | |
861 | #endif | |
862 | ||
863 | static int __synthesize_kprobe_trace_arg_ref(struct kprobe_trace_arg_ref *ref, | |
864 | char **buf, size_t *buflen, | |
865 | int depth) | |
866 | { | |
867 | int ret; | |
868 | if (ref->next) { | |
869 | depth = __synthesize_kprobe_trace_arg_ref(ref->next, buf, | |
870 | buflen, depth + 1); | |
871 | if (depth < 0) | |
872 | goto out; | |
873 | } | |
874 | ||
875 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
876 | if (ret < 0) | |
877 | depth = ret; | |
878 | else { | |
879 | *buf += ret; | |
880 | *buflen -= ret; | |
881 | } | |
882 | out: | |
883 | return depth; | |
4de189fe | 884 | |
4de189fe MH |
885 | } |
886 | ||
4235b045 MH |
887 | static int synthesize_kprobe_trace_arg(struct kprobe_trace_arg *arg, |
888 | char *buf, size_t buflen) | |
50656eec | 889 | { |
4235b045 MH |
890 | int ret, depth = 0; |
891 | char *tmp = buf; | |
892 | ||
893 | /* Argument name or separator */ | |
894 | if (arg->name) | |
895 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
896 | else | |
897 | ret = e_snprintf(buf, buflen, " "); | |
898 | if (ret < 0) | |
899 | return ret; | |
900 | buf += ret; | |
901 | buflen -= ret; | |
902 | ||
903 | /* Dereferencing arguments */ | |
904 | if (arg->ref) { | |
905 | depth = __synthesize_kprobe_trace_arg_ref(arg->ref, &buf, | |
906 | &buflen, 1); | |
907 | if (depth < 0) | |
908 | return depth; | |
909 | } | |
910 | ||
911 | /* Print argument value */ | |
912 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
913 | if (ret < 0) | |
914 | return ret; | |
915 | buf += ret; | |
916 | buflen -= ret; | |
917 | ||
918 | /* Closing */ | |
919 | while (depth--) { | |
920 | ret = e_snprintf(buf, buflen, ")"); | |
921 | if (ret < 0) | |
922 | return ret; | |
923 | buf += ret; | |
924 | buflen -= ret; | |
925 | } | |
4984912e MH |
926 | /* Print argument type */ |
927 | if (arg->type) { | |
928 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
929 | if (ret <= 0) | |
930 | return ret; | |
931 | buf += ret; | |
932 | } | |
4235b045 MH |
933 | |
934 | return buf - tmp; | |
935 | } | |
936 | ||
937 | char *synthesize_kprobe_trace_command(struct kprobe_trace_event *tev) | |
938 | { | |
939 | struct kprobe_trace_point *tp = &tev->point; | |
50656eec MH |
940 | char *buf; |
941 | int i, len, ret; | |
942 | ||
e334016f MH |
943 | buf = zalloc(MAX_CMDLEN); |
944 | if (buf == NULL) | |
945 | return NULL; | |
946 | ||
4235b045 MH |
947 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu", |
948 | tp->retprobe ? 'r' : 'p', | |
949 | tev->group, tev->event, | |
950 | tp->symbol, tp->offset); | |
951 | if (len <= 0) | |
50656eec | 952 | goto error; |
50656eec | 953 | |
4235b045 MH |
954 | for (i = 0; i < tev->nargs; i++) { |
955 | ret = synthesize_kprobe_trace_arg(&tev->args[i], buf + len, | |
956 | MAX_CMDLEN - len); | |
4de189fe | 957 | if (ret <= 0) |
50656eec MH |
958 | goto error; |
959 | len += ret; | |
960 | } | |
50656eec | 961 | |
4235b045 | 962 | return buf; |
50656eec | 963 | error: |
4235b045 MH |
964 | free(buf); |
965 | return NULL; | |
966 | } | |
50656eec | 967 | |
146a1439 MH |
968 | int convert_to_perf_probe_event(struct kprobe_trace_event *tev, |
969 | struct perf_probe_event *pev) | |
4235b045 | 970 | { |
02b95dad | 971 | char buf[64] = ""; |
146a1439 | 972 | int i, ret; |
4235b045 | 973 | |
4b4da7f7 | 974 | /* Convert event/group name */ |
02b95dad MH |
975 | pev->event = strdup(tev->event); |
976 | pev->group = strdup(tev->group); | |
977 | if (pev->event == NULL || pev->group == NULL) | |
978 | return -ENOMEM; | |
fb1587d8 | 979 | |
4b4da7f7 | 980 | /* Convert trace_point to probe_point */ |
146a1439 MH |
981 | ret = convert_to_perf_probe_point(&tev->point, &pev->point); |
982 | if (ret < 0) | |
983 | return ret; | |
4b4da7f7 | 984 | |
4235b045 MH |
985 | /* Convert trace_arg to probe_arg */ |
986 | pev->nargs = tev->nargs; | |
e334016f MH |
987 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
988 | if (pev->args == NULL) | |
989 | return -ENOMEM; | |
02b95dad | 990 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 991 | if (tev->args[i].name) |
02b95dad | 992 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 993 | else { |
146a1439 MH |
994 | ret = synthesize_kprobe_trace_arg(&tev->args[i], |
995 | buf, 64); | |
02b95dad | 996 | pev->args[i].name = strdup(buf); |
4235b045 | 997 | } |
02b95dad MH |
998 | if (pev->args[i].name == NULL && ret >= 0) |
999 | ret = -ENOMEM; | |
1000 | } | |
146a1439 MH |
1001 | |
1002 | if (ret < 0) | |
1003 | clear_perf_probe_event(pev); | |
1004 | ||
1005 | return ret; | |
4235b045 MH |
1006 | } |
1007 | ||
1008 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1009 | { | |
1010 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1011 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1012 | int i; |
1013 | ||
1014 | if (pev->event) | |
1015 | free(pev->event); | |
1016 | if (pev->group) | |
1017 | free(pev->group); | |
1018 | if (pp->file) | |
1019 | free(pp->file); | |
1020 | if (pp->function) | |
1021 | free(pp->function); | |
1022 | if (pp->lazy_line) | |
1023 | free(pp->lazy_line); | |
7df2f329 | 1024 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1025 | if (pev->args[i].name) |
1026 | free(pev->args[i].name); | |
48481938 MH |
1027 | if (pev->args[i].var) |
1028 | free(pev->args[i].var); | |
11a1ca35 MH |
1029 | if (pev->args[i].type) |
1030 | free(pev->args[i].type); | |
7df2f329 MH |
1031 | field = pev->args[i].field; |
1032 | while (field) { | |
1033 | next = field->next; | |
1034 | if (field->name) | |
1035 | free(field->name); | |
1036 | free(field); | |
1037 | field = next; | |
1038 | } | |
1039 | } | |
4235b045 MH |
1040 | if (pev->args) |
1041 | free(pev->args); | |
1042 | memset(pev, 0, sizeof(*pev)); | |
1043 | } | |
1044 | ||
1045 | void clear_kprobe_trace_event(struct kprobe_trace_event *tev) | |
1046 | { | |
1047 | struct kprobe_trace_arg_ref *ref, *next; | |
1048 | int i; | |
1049 | ||
1050 | if (tev->event) | |
1051 | free(tev->event); | |
1052 | if (tev->group) | |
1053 | free(tev->group); | |
1054 | if (tev->point.symbol) | |
1055 | free(tev->point.symbol); | |
1056 | for (i = 0; i < tev->nargs; i++) { | |
1057 | if (tev->args[i].name) | |
1058 | free(tev->args[i].name); | |
1059 | if (tev->args[i].value) | |
1060 | free(tev->args[i].value); | |
4984912e MH |
1061 | if (tev->args[i].type) |
1062 | free(tev->args[i].type); | |
4235b045 MH |
1063 | ref = tev->args[i].ref; |
1064 | while (ref) { | |
1065 | next = ref->next; | |
1066 | free(ref); | |
1067 | ref = next; | |
1068 | } | |
1069 | } | |
1070 | if (tev->args) | |
1071 | free(tev->args); | |
1072 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1073 | } |
1074 | ||
f4d7da49 | 1075 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
1076 | { |
1077 | char buf[PATH_MAX]; | |
7ca5989d | 1078 | const char *__debugfs; |
4de189fe MH |
1079 | int ret; |
1080 | ||
7ca5989d MH |
1081 | __debugfs = debugfs_find_mountpoint(); |
1082 | if (__debugfs == NULL) { | |
1083 | pr_warning("Debugfs is not mounted.\n"); | |
1084 | return -ENOENT; | |
1085 | } | |
1086 | ||
1087 | ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); | |
146a1439 | 1088 | if (ret >= 0) { |
7ca5989d | 1089 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1090 | if (readwrite && !probe_event_dry_run) |
1091 | ret = open(buf, O_RDWR, O_APPEND); | |
1092 | else | |
1093 | ret = open(buf, O_RDONLY, 0); | |
1094 | } | |
f4d7da49 | 1095 | |
4de189fe MH |
1096 | if (ret < 0) { |
1097 | if (errno == ENOENT) | |
146a1439 MH |
1098 | pr_warning("kprobe_events file does not exist - please" |
1099 | " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); | |
4de189fe | 1100 | else |
146a1439 MH |
1101 | pr_warning("Failed to open kprobe_events file: %s\n", |
1102 | strerror(errno)); | |
4de189fe MH |
1103 | } |
1104 | return ret; | |
1105 | } | |
1106 | ||
1107 | /* Get raw string list of current kprobe_events */ | |
4235b045 | 1108 | static struct strlist *get_kprobe_trace_command_rawlist(int fd) |
4de189fe MH |
1109 | { |
1110 | int ret, idx; | |
1111 | FILE *fp; | |
1112 | char buf[MAX_CMDLEN]; | |
1113 | char *p; | |
1114 | struct strlist *sl; | |
1115 | ||
1116 | sl = strlist__new(true, NULL); | |
1117 | ||
1118 | fp = fdopen(dup(fd), "r"); | |
1119 | while (!feof(fp)) { | |
1120 | p = fgets(buf, MAX_CMDLEN, fp); | |
1121 | if (!p) | |
1122 | break; | |
1123 | ||
1124 | idx = strlen(p) - 1; | |
1125 | if (p[idx] == '\n') | |
1126 | p[idx] = '\0'; | |
1127 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1128 | if (ret < 0) { |
1129 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1130 | strlist__delete(sl); | |
1131 | return NULL; | |
1132 | } | |
4de189fe MH |
1133 | } |
1134 | fclose(fp); | |
1135 | ||
1136 | return sl; | |
1137 | } | |
1138 | ||
278498d4 | 1139 | /* Show an event */ |
146a1439 | 1140 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1141 | { |
7e990a51 | 1142 | int i, ret; |
278498d4 | 1143 | char buf[128]; |
4235b045 | 1144 | char *place; |
278498d4 | 1145 | |
4235b045 MH |
1146 | /* Synthesize only event probe point */ |
1147 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1148 | if (!place) |
1149 | return -EINVAL; | |
4235b045 MH |
1150 | |
1151 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1152 | if (ret < 0) |
146a1439 MH |
1153 | return ret; |
1154 | ||
fb1587d8 | 1155 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1156 | |
4235b045 | 1157 | if (pev->nargs > 0) { |
278498d4 | 1158 | printf(" with"); |
7df2f329 | 1159 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1160 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1161 | buf, 128); | |
1162 | if (ret < 0) | |
1163 | break; | |
7df2f329 MH |
1164 | printf(" %s", buf); |
1165 | } | |
278498d4 MH |
1166 | } |
1167 | printf(")\n"); | |
4235b045 | 1168 | free(place); |
146a1439 | 1169 | return ret; |
278498d4 MH |
1170 | } |
1171 | ||
4de189fe | 1172 | /* List up current perf-probe events */ |
146a1439 | 1173 | int show_perf_probe_events(void) |
4de189fe | 1174 | { |
146a1439 | 1175 | int fd, ret; |
4235b045 MH |
1176 | struct kprobe_trace_event tev; |
1177 | struct perf_probe_event pev; | |
4de189fe MH |
1178 | struct strlist *rawlist; |
1179 | struct str_node *ent; | |
1180 | ||
72041334 | 1181 | setup_pager(); |
146a1439 MH |
1182 | ret = init_vmlinux(); |
1183 | if (ret < 0) | |
1184 | return ret; | |
4235b045 MH |
1185 | |
1186 | memset(&tev, 0, sizeof(tev)); | |
1187 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1188 | |
f4d7da49 | 1189 | fd = open_kprobe_events(false); |
146a1439 MH |
1190 | if (fd < 0) |
1191 | return fd; | |
1192 | ||
4235b045 | 1193 | rawlist = get_kprobe_trace_command_rawlist(fd); |
4de189fe | 1194 | close(fd); |
146a1439 MH |
1195 | if (!rawlist) |
1196 | return -ENOENT; | |
4de189fe | 1197 | |
adf365f4 | 1198 | strlist__for_each(ent, rawlist) { |
146a1439 MH |
1199 | ret = parse_kprobe_trace_command(ent->s, &tev); |
1200 | if (ret >= 0) { | |
1201 | ret = convert_to_perf_probe_event(&tev, &pev); | |
1202 | if (ret >= 0) | |
1203 | ret = show_perf_probe_event(&pev); | |
1204 | } | |
4235b045 MH |
1205 | clear_perf_probe_event(&pev); |
1206 | clear_kprobe_trace_event(&tev); | |
146a1439 MH |
1207 | if (ret < 0) |
1208 | break; | |
4de189fe | 1209 | } |
4de189fe | 1210 | strlist__delete(rawlist); |
146a1439 MH |
1211 | |
1212 | return ret; | |
4de189fe MH |
1213 | } |
1214 | ||
b498ce1f | 1215 | /* Get current perf-probe event names */ |
4235b045 | 1216 | static struct strlist *get_kprobe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1217 | { |
fa28244d | 1218 | char buf[128]; |
b498ce1f MH |
1219 | struct strlist *sl, *rawlist; |
1220 | struct str_node *ent; | |
4235b045 | 1221 | struct kprobe_trace_event tev; |
146a1439 | 1222 | int ret = 0; |
b498ce1f | 1223 | |
4235b045 | 1224 | memset(&tev, 0, sizeof(tev)); |
b498ce1f | 1225 | |
4235b045 | 1226 | rawlist = get_kprobe_trace_command_rawlist(fd); |
e1d2017b | 1227 | sl = strlist__new(true, NULL); |
adf365f4 | 1228 | strlist__for_each(ent, rawlist) { |
146a1439 MH |
1229 | ret = parse_kprobe_trace_command(ent->s, &tev); |
1230 | if (ret < 0) | |
1231 | break; | |
fa28244d | 1232 | if (include_group) { |
146a1439 MH |
1233 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1234 | tev.event); | |
1235 | if (ret >= 0) | |
1236 | ret = strlist__add(sl, buf); | |
fa28244d | 1237 | } else |
146a1439 | 1238 | ret = strlist__add(sl, tev.event); |
4235b045 | 1239 | clear_kprobe_trace_event(&tev); |
146a1439 MH |
1240 | if (ret < 0) |
1241 | break; | |
b498ce1f | 1242 | } |
b498ce1f MH |
1243 | strlist__delete(rawlist); |
1244 | ||
146a1439 MH |
1245 | if (ret < 0) { |
1246 | strlist__delete(sl); | |
1247 | return NULL; | |
1248 | } | |
b498ce1f MH |
1249 | return sl; |
1250 | } | |
1251 | ||
146a1439 | 1252 | static int write_kprobe_trace_event(int fd, struct kprobe_trace_event *tev) |
50656eec MH |
1253 | { |
1254 | int ret; | |
4235b045 | 1255 | char *buf = synthesize_kprobe_trace_command(tev); |
50656eec | 1256 | |
146a1439 MH |
1257 | if (!buf) { |
1258 | pr_debug("Failed to synthesize kprobe trace event.\n"); | |
1259 | return -EINVAL; | |
1260 | } | |
1261 | ||
fa28244d | 1262 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1263 | if (!probe_event_dry_run) { |
1264 | ret = write(fd, buf, strlen(buf)); | |
1265 | if (ret <= 0) | |
146a1439 MH |
1266 | pr_warning("Failed to write event: %s\n", |
1267 | strerror(errno)); | |
f4d7da49 | 1268 | } |
4235b045 | 1269 | free(buf); |
146a1439 | 1270 | return ret; |
50656eec MH |
1271 | } |
1272 | ||
146a1439 MH |
1273 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1274 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1275 | { |
1276 | int i, ret; | |
17f88fcd MH |
1277 | |
1278 | /* Try no suffix */ | |
1279 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1280 | if (ret < 0) { |
1281 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1282 | return ret; | |
1283 | } | |
17f88fcd | 1284 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1285 | return 0; |
17f88fcd | 1286 | |
d761b08b MH |
1287 | if (!allow_suffix) { |
1288 | pr_warning("Error: event \"%s\" already exists. " | |
1289 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1290 | return -EEXIST; |
d761b08b MH |
1291 | } |
1292 | ||
17f88fcd MH |
1293 | /* Try to add suffix */ |
1294 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1295 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1296 | if (ret < 0) { |
1297 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1298 | return ret; | |
1299 | } | |
b498ce1f MH |
1300 | if (!strlist__has_entry(namelist, buf)) |
1301 | break; | |
1302 | } | |
146a1439 MH |
1303 | if (i == MAX_EVENT_INDEX) { |
1304 | pr_warning("Too many events are on the same function.\n"); | |
1305 | ret = -ERANGE; | |
1306 | } | |
1307 | ||
1308 | return ret; | |
b498ce1f MH |
1309 | } |
1310 | ||
146a1439 MH |
1311 | static int __add_kprobe_trace_events(struct perf_probe_event *pev, |
1312 | struct kprobe_trace_event *tevs, | |
1313 | int ntevs, bool allow_suffix) | |
50656eec | 1314 | { |
146a1439 | 1315 | int i, fd, ret; |
55632770 | 1316 | struct kprobe_trace_event *tev = NULL; |
4235b045 MH |
1317 | char buf[64]; |
1318 | const char *event, *group; | |
b498ce1f | 1319 | struct strlist *namelist; |
50656eec | 1320 | |
f4d7da49 | 1321 | fd = open_kprobe_events(true); |
146a1439 MH |
1322 | if (fd < 0) |
1323 | return fd; | |
b498ce1f | 1324 | /* Get current event names */ |
4235b045 | 1325 | namelist = get_kprobe_trace_event_names(fd, false); |
146a1439 MH |
1326 | if (!namelist) { |
1327 | pr_debug("Failed to get current event list.\n"); | |
1328 | return -EIO; | |
1329 | } | |
4235b045 | 1330 | |
146a1439 | 1331 | ret = 0; |
4235b045 | 1332 | printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1333 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1334 | tev = &tevs[i]; |
1335 | if (pev->event) | |
1336 | event = pev->event; | |
1337 | else | |
1338 | if (pev->point.function) | |
1339 | event = pev->point.function; | |
1340 | else | |
1341 | event = tev->point.symbol; | |
1342 | if (pev->group) | |
1343 | group = pev->group; | |
1344 | else | |
1345 | group = PERFPROBE_GROUP; | |
1346 | ||
1347 | /* Get an unused new event name */ | |
146a1439 MH |
1348 | ret = get_new_event_name(buf, 64, event, |
1349 | namelist, allow_suffix); | |
1350 | if (ret < 0) | |
1351 | break; | |
4235b045 MH |
1352 | event = buf; |
1353 | ||
02b95dad MH |
1354 | tev->event = strdup(event); |
1355 | tev->group = strdup(group); | |
1356 | if (tev->event == NULL || tev->group == NULL) { | |
1357 | ret = -ENOMEM; | |
1358 | break; | |
1359 | } | |
146a1439 MH |
1360 | ret = write_kprobe_trace_event(fd, tev); |
1361 | if (ret < 0) | |
1362 | break; | |
4235b045 MH |
1363 | /* Add added event name to namelist */ |
1364 | strlist__add(namelist, event); | |
1365 | ||
1366 | /* Trick here - save current event/group */ | |
1367 | event = pev->event; | |
1368 | group = pev->group; | |
1369 | pev->event = tev->event; | |
1370 | pev->group = tev->group; | |
1371 | show_perf_probe_event(pev); | |
1372 | /* Trick here - restore current event/group */ | |
1373 | pev->event = (char *)event; | |
1374 | pev->group = (char *)group; | |
1375 | ||
1376 | /* | |
1377 | * Probes after the first probe which comes from same | |
1378 | * user input are always allowed to add suffix, because | |
1379 | * there might be several addresses corresponding to | |
1380 | * one code line. | |
1381 | */ | |
1382 | allow_suffix = true; | |
50656eec | 1383 | } |
146a1439 MH |
1384 | |
1385 | if (ret >= 0) { | |
1386 | /* Show how to use the event. */ | |
1387 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
1388 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
1389 | tev->event); | |
1390 | } | |
a9b495b0 | 1391 | |
e1d2017b | 1392 | strlist__delete(namelist); |
50656eec | 1393 | close(fd); |
146a1439 | 1394 | return ret; |
50656eec | 1395 | } |
fa28244d | 1396 | |
4235b045 MH |
1397 | static int convert_to_kprobe_trace_events(struct perf_probe_event *pev, |
1398 | struct kprobe_trace_event **tevs) | |
e0faa8d3 MH |
1399 | { |
1400 | struct symbol *sym; | |
e334016f | 1401 | int ret = 0, i; |
4235b045 MH |
1402 | struct kprobe_trace_event *tev; |
1403 | ||
4b4da7f7 | 1404 | /* Convert perf_probe_event with debuginfo */ |
e334016f MH |
1405 | ret = try_to_find_kprobe_trace_events(pev, tevs); |
1406 | if (ret != 0) | |
1407 | return ret; | |
e0faa8d3 | 1408 | |
4235b045 | 1409 | /* Allocate trace event buffer */ |
e334016f MH |
1410 | tev = *tevs = zalloc(sizeof(struct kprobe_trace_event)); |
1411 | if (tev == NULL) | |
1412 | return -ENOMEM; | |
4235b045 MH |
1413 | |
1414 | /* Copy parameters */ | |
02b95dad MH |
1415 | tev->point.symbol = strdup(pev->point.function); |
1416 | if (tev->point.symbol == NULL) { | |
1417 | ret = -ENOMEM; | |
1418 | goto error; | |
1419 | } | |
4235b045 MH |
1420 | tev->point.offset = pev->point.offset; |
1421 | tev->nargs = pev->nargs; | |
1422 | if (tev->nargs) { | |
e334016f MH |
1423 | tev->args = zalloc(sizeof(struct kprobe_trace_arg) |
1424 | * tev->nargs); | |
1425 | if (tev->args == NULL) { | |
02b95dad MH |
1426 | ret = -ENOMEM; |
1427 | goto error; | |
e334016f | 1428 | } |
48481938 | 1429 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1430 | if (pev->args[i].name) { |
1431 | tev->args[i].name = strdup(pev->args[i].name); | |
1432 | if (tev->args[i].name == NULL) { | |
1433 | ret = -ENOMEM; | |
1434 | goto error; | |
1435 | } | |
1436 | } | |
1437 | tev->args[i].value = strdup(pev->args[i].var); | |
1438 | if (tev->args[i].value == NULL) { | |
1439 | ret = -ENOMEM; | |
1440 | goto error; | |
1441 | } | |
1442 | if (pev->args[i].type) { | |
1443 | tev->args[i].type = strdup(pev->args[i].type); | |
1444 | if (tev->args[i].type == NULL) { | |
1445 | ret = -ENOMEM; | |
1446 | goto error; | |
1447 | } | |
1448 | } | |
48481938 | 1449 | } |
4235b045 MH |
1450 | } |
1451 | ||
1452 | /* Currently just checking function name from symbol map */ | |
1453 | sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION], | |
1454 | tev->point.symbol, NULL); | |
146a1439 MH |
1455 | if (!sym) { |
1456 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1457 | tev->point.symbol); | |
02b95dad MH |
1458 | ret = -ENOENT; |
1459 | goto error; | |
1460 | } | |
e334016f | 1461 | |
02b95dad MH |
1462 | return 1; |
1463 | error: | |
1464 | clear_kprobe_trace_event(tev); | |
1465 | free(tev); | |
1466 | *tevs = NULL; | |
e334016f | 1467 | return ret; |
4235b045 MH |
1468 | } |
1469 | ||
1470 | struct __event_package { | |
1471 | struct perf_probe_event *pev; | |
1472 | struct kprobe_trace_event *tevs; | |
1473 | int ntevs; | |
1474 | }; | |
1475 | ||
146a1439 MH |
1476 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
1477 | bool force_add) | |
4235b045 | 1478 | { |
146a1439 | 1479 | int i, j, ret; |
4235b045 MH |
1480 | struct __event_package *pkgs; |
1481 | ||
e334016f MH |
1482 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
1483 | if (pkgs == NULL) | |
1484 | return -ENOMEM; | |
4235b045 MH |
1485 | |
1486 | /* Init vmlinux path */ | |
146a1439 MH |
1487 | ret = init_vmlinux(); |
1488 | if (ret < 0) | |
1489 | return ret; | |
4235b045 MH |
1490 | |
1491 | /* Loop 1: convert all events */ | |
1492 | for (i = 0; i < npevs; i++) { | |
1493 | pkgs[i].pev = &pevs[i]; | |
1494 | /* Convert with or without debuginfo */ | |
146a1439 MH |
1495 | ret = convert_to_kprobe_trace_events(pkgs[i].pev, |
1496 | &pkgs[i].tevs); | |
1497 | if (ret < 0) | |
1498 | goto end; | |
1499 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
1500 | } |
1501 | ||
4235b045 | 1502 | /* Loop 2: add all events */ |
146a1439 MH |
1503 | for (i = 0; i < npevs && ret >= 0; i++) |
1504 | ret = __add_kprobe_trace_events(pkgs[i].pev, pkgs[i].tevs, | |
1505 | pkgs[i].ntevs, force_add); | |
1506 | end: | |
1507 | /* Loop 3: cleanup trace events */ | |
4235b045 | 1508 | for (i = 0; i < npevs; i++) |
146a1439 MH |
1509 | for (j = 0; j < pkgs[i].ntevs; j++) |
1510 | clear_kprobe_trace_event(&pkgs[i].tevs[j]); | |
1511 | ||
1512 | return ret; | |
e0faa8d3 MH |
1513 | } |
1514 | ||
146a1439 | 1515 | static int __del_trace_kprobe_event(int fd, struct str_node *ent) |
bbbb521b MH |
1516 | { |
1517 | char *p; | |
1518 | char buf[128]; | |
4235b045 | 1519 | int ret; |
bbbb521b MH |
1520 | |
1521 | /* Convert from perf-probe event to trace-kprobe event */ | |
146a1439 MH |
1522 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
1523 | if (ret < 0) | |
1524 | goto error; | |
1525 | ||
bbbb521b | 1526 | p = strchr(buf + 2, ':'); |
146a1439 MH |
1527 | if (!p) { |
1528 | pr_debug("Internal error: %s should have ':' but not.\n", | |
1529 | ent->s); | |
1530 | ret = -ENOTSUP; | |
1531 | goto error; | |
1532 | } | |
bbbb521b MH |
1533 | *p = '/'; |
1534 | ||
4235b045 MH |
1535 | pr_debug("Writing event: %s\n", buf); |
1536 | ret = write(fd, buf, strlen(buf)); | |
146a1439 MH |
1537 | if (ret < 0) |
1538 | goto error; | |
1539 | ||
bbbb521b | 1540 | printf("Remove event: %s\n", ent->s); |
146a1439 MH |
1541 | return 0; |
1542 | error: | |
1543 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
1544 | return ret; | |
bbbb521b MH |
1545 | } |
1546 | ||
146a1439 MH |
1547 | static int del_trace_kprobe_event(int fd, const char *group, |
1548 | const char *event, struct strlist *namelist) | |
fa28244d MH |
1549 | { |
1550 | char buf[128]; | |
bbbb521b | 1551 | struct str_node *ent, *n; |
146a1439 | 1552 | int found = 0, ret = 0; |
fa28244d | 1553 | |
146a1439 MH |
1554 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
1555 | if (ret < 0) { | |
1556 | pr_err("Failed to copy event."); | |
1557 | return ret; | |
1558 | } | |
fa28244d | 1559 | |
bbbb521b MH |
1560 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
1561 | strlist__for_each_safe(ent, n, namelist) | |
1562 | if (strglobmatch(ent->s, buf)) { | |
1563 | found++; | |
146a1439 MH |
1564 | ret = __del_trace_kprobe_event(fd, ent); |
1565 | if (ret < 0) | |
1566 | break; | |
bbbb521b MH |
1567 | strlist__remove(namelist, ent); |
1568 | } | |
1569 | } else { | |
1570 | ent = strlist__find(namelist, buf); | |
1571 | if (ent) { | |
1572 | found++; | |
146a1439 MH |
1573 | ret = __del_trace_kprobe_event(fd, ent); |
1574 | if (ret >= 0) | |
1575 | strlist__remove(namelist, ent); | |
bbbb521b MH |
1576 | } |
1577 | } | |
146a1439 MH |
1578 | if (found == 0 && ret >= 0) |
1579 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
1580 | ||
1581 | return ret; | |
fa28244d MH |
1582 | } |
1583 | ||
146a1439 | 1584 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 1585 | { |
146a1439 | 1586 | int fd, ret = 0; |
fa28244d MH |
1587 | const char *group, *event; |
1588 | char *p, *str; | |
1589 | struct str_node *ent; | |
1590 | struct strlist *namelist; | |
1591 | ||
f4d7da49 | 1592 | fd = open_kprobe_events(true); |
146a1439 MH |
1593 | if (fd < 0) |
1594 | return fd; | |
1595 | ||
fa28244d | 1596 | /* Get current event names */ |
4235b045 | 1597 | namelist = get_kprobe_trace_event_names(fd, true); |
146a1439 MH |
1598 | if (namelist == NULL) |
1599 | return -EINVAL; | |
fa28244d | 1600 | |
adf365f4 | 1601 | strlist__for_each(ent, dellist) { |
02b95dad MH |
1602 | str = strdup(ent->s); |
1603 | if (str == NULL) { | |
1604 | ret = -ENOMEM; | |
1605 | break; | |
1606 | } | |
bbbb521b | 1607 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
1608 | p = strchr(str, ':'); |
1609 | if (p) { | |
1610 | group = str; | |
1611 | *p = '\0'; | |
1612 | event = p + 1; | |
1613 | } else { | |
bbbb521b | 1614 | group = "*"; |
fa28244d MH |
1615 | event = str; |
1616 | } | |
bbbb521b | 1617 | pr_debug("Group: %s, Event: %s\n", group, event); |
146a1439 | 1618 | ret = del_trace_kprobe_event(fd, group, event, namelist); |
fa28244d | 1619 | free(str); |
146a1439 MH |
1620 | if (ret < 0) |
1621 | break; | |
fa28244d MH |
1622 | } |
1623 | strlist__delete(namelist); | |
1624 | close(fd); | |
146a1439 MH |
1625 | |
1626 | return ret; | |
fa28244d MH |
1627 | } |
1628 |