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 | { |
a1645ce1 | 81 | struct dso *kernel; |
146a1439 MH |
82 | int ret; |
83 | ||
e0faa8d3 MH |
84 | symbol_conf.sort_by_name = true; |
85 | if (symbol_conf.vmlinux_name == NULL) | |
86 | symbol_conf.try_vmlinux_path = true; | |
87 | else | |
88 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
146a1439 MH |
89 | ret = symbol__init(); |
90 | if (ret < 0) { | |
91 | pr_debug("Failed to init symbol map.\n"); | |
92 | goto out; | |
93 | } | |
e0faa8d3 | 94 | |
a1645ce1 ZY |
95 | kernel = dso__new_kernel(symbol_conf.vmlinux_name); |
96 | if (kernel == NULL) | |
97 | die("Failed to create kernel dso."); | |
98 | ||
e0faa8d3 | 99 | map_groups__init(&kmap_groups); |
a1645ce1 | 100 | ret = __map_groups__create_kernel_maps(&kmap_groups, kmaps, kernel); |
146a1439 MH |
101 | if (ret < 0) |
102 | pr_debug("Failed to create kernel maps.\n"); | |
103 | ||
104 | out: | |
105 | if (ret < 0) | |
106 | pr_warning("Failed to init vmlinux path.\n"); | |
107 | return ret; | |
e0faa8d3 MH |
108 | } |
109 | ||
4b4da7f7 | 110 | #ifdef DWARF_SUPPORT |
e0faa8d3 MH |
111 | static int open_vmlinux(void) |
112 | { | |
113 | if (map__load(kmaps[MAP__FUNCTION], NULL) < 0) { | |
114 | pr_debug("Failed to load kernel map.\n"); | |
115 | return -EINVAL; | |
116 | } | |
117 | pr_debug("Try to open %s\n", kmaps[MAP__FUNCTION]->dso->long_name); | |
118 | return open(kmaps[MAP__FUNCTION]->dso->long_name, O_RDONLY); | |
119 | } | |
4b4da7f7 | 120 | |
146a1439 MH |
121 | /* Convert trace point to probe point with debuginfo */ |
122 | static int convert_to_perf_probe_point(struct kprobe_trace_point *tp, | |
123 | struct perf_probe_point *pp) | |
4b4da7f7 MH |
124 | { |
125 | struct symbol *sym; | |
146a1439 | 126 | int fd, ret = -ENOENT; |
4b4da7f7 MH |
127 | |
128 | sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION], | |
129 | tp->symbol, NULL); | |
130 | if (sym) { | |
131 | fd = open_vmlinux(); | |
146a1439 MH |
132 | if (fd >= 0) { |
133 | ret = find_perf_probe_point(fd, | |
134 | sym->start + tp->offset, pp); | |
135 | close(fd); | |
136 | } | |
4b4da7f7 MH |
137 | } |
138 | if (ret <= 0) { | |
146a1439 MH |
139 | pr_debug("Failed to find corresponding probes from " |
140 | "debuginfo. Use kprobe event information.\n"); | |
02b95dad MH |
141 | pp->function = strdup(tp->symbol); |
142 | if (pp->function == NULL) | |
143 | return -ENOMEM; | |
4b4da7f7 MH |
144 | pp->offset = tp->offset; |
145 | } | |
146 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
147 | |
148 | return 0; | |
4b4da7f7 MH |
149 | } |
150 | ||
151 | /* Try to find perf_probe_event with debuginfo */ | |
152 | static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, | |
153 | struct kprobe_trace_event **tevs) | |
154 | { | |
155 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
156 | int fd, ntevs; | |
157 | ||
158 | fd = open_vmlinux(); | |
159 | if (fd < 0) { | |
146a1439 MH |
160 | if (need_dwarf) { |
161 | pr_warning("Failed to open debuginfo file.\n"); | |
162 | return fd; | |
163 | } | |
4b4da7f7 MH |
164 | pr_debug("Could not open vmlinux. Try to use symbols.\n"); |
165 | return 0; | |
166 | } | |
167 | ||
168 | /* Searching trace events corresponding to probe event */ | |
169 | ntevs = find_kprobe_trace_events(fd, pev, tevs); | |
170 | close(fd); | |
171 | ||
146a1439 MH |
172 | if (ntevs > 0) { /* Succeeded to find trace events */ |
173 | pr_debug("find %d kprobe_trace_events.\n", ntevs); | |
4b4da7f7 | 174 | return ntevs; |
146a1439 | 175 | } |
4b4da7f7 | 176 | |
146a1439 MH |
177 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
178 | pr_warning("Probe point '%s' not found.\n", | |
179 | synthesize_perf_probe_point(&pev->point)); | |
180 | return -ENOENT; | |
181 | } | |
182 | /* Error path : ntevs < 0 */ | |
4b4da7f7 | 183 | if (need_dwarf) { |
b55a87ad | 184 | if (ntevs == -EBADF) |
4b4da7f7 MH |
185 | pr_warning("No dwarf info found in the vmlinux - " |
186 | "please rebuild with CONFIG_DEBUG_INFO=y.\n"); | |
146a1439 | 187 | return ntevs; |
4b4da7f7 MH |
188 | } |
189 | pr_debug("An error occurred in debuginfo analysis." | |
190 | " Try to use symbols.\n"); | |
191 | return 0; | |
4b4da7f7 MH |
192 | } |
193 | ||
194 | #define LINEBUF_SIZE 256 | |
195 | #define NR_ADDITIONAL_LINES 2 | |
196 | ||
d3b63d7a | 197 | static int show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
198 | { |
199 | char buf[LINEBUF_SIZE]; | |
200 | const char *color = PERF_COLOR_BLUE; | |
201 | ||
202 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
203 | goto error; | |
204 | if (!skip) { | |
205 | if (show_num) | |
d3b63d7a | 206 | fprintf(stdout, "%7d %s", l, buf); |
4b4da7f7 MH |
207 | else |
208 | color_fprintf(stdout, color, " %s", buf); | |
209 | } | |
210 | ||
211 | while (strlen(buf) == LINEBUF_SIZE - 1 && | |
212 | buf[LINEBUF_SIZE - 2] != '\n') { | |
213 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
214 | goto error; | |
215 | if (!skip) { | |
216 | if (show_num) | |
217 | fprintf(stdout, "%s", buf); | |
218 | else | |
219 | color_fprintf(stdout, color, "%s", buf); | |
220 | } | |
221 | } | |
146a1439 MH |
222 | |
223 | return 0; | |
4b4da7f7 MH |
224 | error: |
225 | if (feof(fp)) | |
146a1439 | 226 | pr_warning("Source file is shorter than expected.\n"); |
4b4da7f7 | 227 | else |
146a1439 MH |
228 | pr_warning("File read error: %s\n", strerror(errno)); |
229 | ||
230 | return -1; | |
4b4da7f7 MH |
231 | } |
232 | ||
233 | /* | |
234 | * Show line-range always requires debuginfo to find source file and | |
235 | * line number. | |
236 | */ | |
146a1439 | 237 | int show_line_range(struct line_range *lr) |
4b4da7f7 | 238 | { |
d3b63d7a | 239 | int l = 1; |
4b4da7f7 MH |
240 | struct line_node *ln; |
241 | FILE *fp; | |
242 | int fd, ret; | |
243 | ||
244 | /* Search a line range */ | |
146a1439 MH |
245 | ret = init_vmlinux(); |
246 | if (ret < 0) | |
247 | return ret; | |
248 | ||
4b4da7f7 | 249 | fd = open_vmlinux(); |
146a1439 MH |
250 | if (fd < 0) { |
251 | pr_warning("Failed to open debuginfo file.\n"); | |
252 | return fd; | |
253 | } | |
254 | ||
4b4da7f7 | 255 | ret = find_line_range(fd, lr); |
4b4da7f7 | 256 | close(fd); |
146a1439 MH |
257 | if (ret == 0) { |
258 | pr_warning("Specified source line is not found.\n"); | |
259 | return -ENOENT; | |
260 | } else if (ret < 0) { | |
261 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
262 | return ret; | |
263 | } | |
4b4da7f7 MH |
264 | |
265 | setup_pager(); | |
266 | ||
267 | if (lr->function) | |
268 | fprintf(stdout, "<%s:%d>\n", lr->function, | |
269 | lr->start - lr->offset); | |
270 | else | |
271 | fprintf(stdout, "<%s:%d>\n", lr->file, lr->start); | |
272 | ||
273 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
274 | if (fp == NULL) { |
275 | pr_warning("Failed to open %s: %s\n", lr->path, | |
276 | strerror(errno)); | |
277 | return -errno; | |
278 | } | |
4b4da7f7 | 279 | /* Skip to starting line number */ |
146a1439 MH |
280 | while (l < lr->start && ret >= 0) |
281 | ret = show_one_line(fp, l++, true, false); | |
282 | if (ret < 0) | |
283 | goto end; | |
4b4da7f7 MH |
284 | |
285 | list_for_each_entry(ln, &lr->line_list, list) { | |
146a1439 MH |
286 | while (ln->line > l && ret >= 0) |
287 | ret = show_one_line(fp, (l++) - lr->offset, | |
288 | false, false); | |
289 | if (ret >= 0) | |
290 | ret = show_one_line(fp, (l++) - lr->offset, | |
291 | false, true); | |
292 | if (ret < 0) | |
293 | goto end; | |
4b4da7f7 MH |
294 | } |
295 | ||
296 | if (lr->end == INT_MAX) | |
297 | lr->end = l + NR_ADDITIONAL_LINES; | |
dda4ab34 | 298 | while (l <= lr->end && !feof(fp) && ret >= 0) |
146a1439 MH |
299 | ret = show_one_line(fp, (l++) - lr->offset, false, false); |
300 | end: | |
4b4da7f7 | 301 | fclose(fp); |
146a1439 | 302 | return ret; |
4b4da7f7 MH |
303 | } |
304 | ||
305 | #else /* !DWARF_SUPPORT */ | |
306 | ||
146a1439 | 307 | static int convert_to_perf_probe_point(struct kprobe_trace_point *tp, |
4b4da7f7 MH |
308 | struct perf_probe_point *pp) |
309 | { | |
02b95dad MH |
310 | pp->function = strdup(tp->symbol); |
311 | if (pp->function == NULL) | |
312 | return -ENOMEM; | |
4b4da7f7 MH |
313 | pp->offset = tp->offset; |
314 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
315 | |
316 | return 0; | |
4b4da7f7 MH |
317 | } |
318 | ||
319 | static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, | |
320 | struct kprobe_trace_event **tevs __unused) | |
321 | { | |
146a1439 MH |
322 | if (perf_probe_event_need_dwarf(pev)) { |
323 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
324 | return -ENOSYS; | |
325 | } | |
4b4da7f7 MH |
326 | return 0; |
327 | } | |
328 | ||
146a1439 | 329 | int show_line_range(struct line_range *lr __unused) |
4b4da7f7 | 330 | { |
146a1439 MH |
331 | pr_warning("Debuginfo-analysis is not supported.\n"); |
332 | return -ENOSYS; | |
4b4da7f7 MH |
333 | } |
334 | ||
e0faa8d3 MH |
335 | #endif |
336 | ||
146a1439 | 337 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def MH |
338 | { |
339 | const char *ptr; | |
340 | char *tmp; | |
341 | /* | |
342 | * <Syntax> | |
343 | * SRC:SLN[+NUM|-ELN] | |
344 | * FUNC[:SLN[+NUM|-ELN]] | |
345 | */ | |
346 | ptr = strchr(arg, ':'); | |
347 | if (ptr) { | |
d3b63d7a | 348 | lr->start = (int)strtoul(ptr + 1, &tmp, 0); |
dda4ab34 | 349 | if (*tmp == '+') { |
d3b63d7a | 350 | lr->end = lr->start + (int)strtoul(tmp + 1, &tmp, 0); |
dda4ab34 MH |
351 | lr->end--; /* |
352 | * Adjust the number of lines here. | |
353 | * If the number of lines == 1, the | |
354 | * the end of line should be equal to | |
355 | * the start of line. | |
356 | */ | |
357 | } else if (*tmp == '-') | |
d3b63d7a | 358 | lr->end = (int)strtoul(tmp + 1, &tmp, 0); |
631c9def | 359 | else |
d3b63d7a MH |
360 | lr->end = INT_MAX; |
361 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); | |
362 | if (lr->start > lr->end) { | |
631c9def | 363 | semantic_error("Start line must be smaller" |
146a1439 MH |
364 | " than end line.\n"); |
365 | return -EINVAL; | |
366 | } | |
367 | if (*tmp != '\0') { | |
368 | semantic_error("Tailing with invalid character '%d'.\n", | |
631c9def | 369 | *tmp); |
146a1439 MH |
370 | return -EINVAL; |
371 | } | |
02b95dad | 372 | tmp = strndup(arg, (ptr - arg)); |
d3b63d7a | 373 | } else { |
02b95dad | 374 | tmp = strdup(arg); |
d3b63d7a MH |
375 | lr->end = INT_MAX; |
376 | } | |
02b95dad MH |
377 | |
378 | if (tmp == NULL) | |
379 | return -ENOMEM; | |
631c9def MH |
380 | |
381 | if (strchr(tmp, '.')) | |
382 | lr->file = tmp; | |
383 | else | |
384 | lr->function = tmp; | |
146a1439 MH |
385 | |
386 | return 0; | |
631c9def MH |
387 | } |
388 | ||
b7702a21 MH |
389 | /* Check the name is good for event/group */ |
390 | static bool check_event_name(const char *name) | |
391 | { | |
392 | if (!isalpha(*name) && *name != '_') | |
393 | return false; | |
394 | while (*++name != '\0') { | |
395 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
396 | return false; | |
397 | } | |
398 | return true; | |
399 | } | |
400 | ||
50656eec | 401 | /* Parse probepoint definition. */ |
146a1439 | 402 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 403 | { |
4235b045 | 404 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
405 | char *ptr, *tmp; |
406 | char c, nc = 0; | |
407 | /* | |
408 | * <Syntax> | |
2a9c8c36 MH |
409 | * perf probe [EVENT=]SRC[:LN|;PTN] |
410 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
411 | * |
412 | * TODO:Group name support | |
50656eec MH |
413 | */ |
414 | ||
2a9c8c36 MH |
415 | ptr = strpbrk(arg, ";=@+%"); |
416 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
417 | *ptr = '\0'; |
418 | tmp = ptr + 1; | |
146a1439 MH |
419 | if (strchr(arg, ':')) { |
420 | semantic_error("Group name is not supported yet.\n"); | |
421 | return -ENOTSUP; | |
422 | } | |
423 | if (!check_event_name(arg)) { | |
b7702a21 | 424 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
425 | "follow C symbol-naming rule.\n", arg); |
426 | return -EINVAL; | |
427 | } | |
02b95dad MH |
428 | pev->event = strdup(arg); |
429 | if (pev->event == NULL) | |
430 | return -ENOMEM; | |
4235b045 | 431 | pev->group = NULL; |
af663d75 MH |
432 | arg = tmp; |
433 | } | |
434 | ||
2a9c8c36 | 435 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
436 | if (ptr) { |
437 | nc = *ptr; | |
438 | *ptr++ = '\0'; | |
439 | } | |
440 | ||
02b95dad MH |
441 | tmp = strdup(arg); |
442 | if (tmp == NULL) | |
443 | return -ENOMEM; | |
444 | ||
50656eec | 445 | /* Check arg is function or file and copy it */ |
02b95dad MH |
446 | if (strchr(tmp, '.')) /* File */ |
447 | pp->file = tmp; | |
50656eec | 448 | else /* Function */ |
02b95dad | 449 | pp->function = tmp; |
50656eec MH |
450 | |
451 | /* Parse other options */ | |
452 | while (ptr) { | |
453 | arg = ptr; | |
454 | c = nc; | |
2a9c8c36 | 455 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
456 | pp->lazy_line = strdup(arg); |
457 | if (pp->lazy_line == NULL) | |
458 | return -ENOMEM; | |
2a9c8c36 MH |
459 | break; |
460 | } | |
461 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
462 | if (ptr) { |
463 | nc = *ptr; | |
464 | *ptr++ = '\0'; | |
465 | } | |
466 | switch (c) { | |
467 | case ':': /* Line number */ | |
468 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 469 | if (*tmp != '\0') { |
2a9c8c36 | 470 | semantic_error("There is non-digit char" |
146a1439 MH |
471 | " in line number.\n"); |
472 | return -EINVAL; | |
473 | } | |
50656eec MH |
474 | break; |
475 | case '+': /* Byte offset from a symbol */ | |
476 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 477 | if (*tmp != '\0') { |
2a9c8c36 | 478 | semantic_error("There is non-digit character" |
146a1439 MH |
479 | " in offset.\n"); |
480 | return -EINVAL; | |
481 | } | |
50656eec MH |
482 | break; |
483 | case '@': /* File name */ | |
146a1439 MH |
484 | if (pp->file) { |
485 | semantic_error("SRC@SRC is not allowed.\n"); | |
486 | return -EINVAL; | |
487 | } | |
02b95dad MH |
488 | pp->file = strdup(arg); |
489 | if (pp->file == NULL) | |
490 | return -ENOMEM; | |
50656eec MH |
491 | break; |
492 | case '%': /* Probe places */ | |
493 | if (strcmp(arg, "return") == 0) { | |
494 | pp->retprobe = 1; | |
146a1439 MH |
495 | } else { /* Others not supported yet */ |
496 | semantic_error("%%%s is not supported.\n", arg); | |
497 | return -ENOTSUP; | |
498 | } | |
50656eec | 499 | break; |
146a1439 MH |
500 | default: /* Buggy case */ |
501 | pr_err("This program has a bug at %s:%d.\n", | |
502 | __FILE__, __LINE__); | |
503 | return -ENOTSUP; | |
50656eec MH |
504 | break; |
505 | } | |
506 | } | |
507 | ||
508 | /* Exclusion check */ | |
146a1439 | 509 | if (pp->lazy_line && pp->line) { |
2a9c8c36 | 510 | semantic_error("Lazy pattern can't be used with line number."); |
146a1439 MH |
511 | return -EINVAL; |
512 | } | |
2a9c8c36 | 513 | |
146a1439 | 514 | if (pp->lazy_line && pp->offset) { |
2a9c8c36 | 515 | semantic_error("Lazy pattern can't be used with offset."); |
146a1439 MH |
516 | return -EINVAL; |
517 | } | |
2a9c8c36 | 518 | |
146a1439 | 519 | if (pp->line && pp->offset) { |
50656eec | 520 | semantic_error("Offset can't be used with line number."); |
146a1439 MH |
521 | return -EINVAL; |
522 | } | |
50656eec | 523 | |
146a1439 | 524 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 MH |
525 | semantic_error("File always requires line number or " |
526 | "lazy pattern."); | |
146a1439 MH |
527 | return -EINVAL; |
528 | } | |
50656eec | 529 | |
146a1439 | 530 | if (pp->offset && !pp->function) { |
50656eec | 531 | semantic_error("Offset requires an entry function."); |
146a1439 MH |
532 | return -EINVAL; |
533 | } | |
50656eec | 534 | |
146a1439 | 535 | if (pp->retprobe && !pp->function) { |
50656eec | 536 | semantic_error("Return probe requires an entry function."); |
146a1439 MH |
537 | return -EINVAL; |
538 | } | |
50656eec | 539 | |
146a1439 | 540 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 MH |
541 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
542 | "return probe."); | |
146a1439 MH |
543 | return -EINVAL; |
544 | } | |
50656eec | 545 | |
4235b045 | 546 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
547 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
548 | pp->lazy_line); | |
146a1439 | 549 | return 0; |
50656eec MH |
550 | } |
551 | ||
7df2f329 | 552 | /* Parse perf-probe event argument */ |
146a1439 | 553 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 554 | { |
48481938 | 555 | char *tmp; |
7df2f329 MH |
556 | struct perf_probe_arg_field **fieldp; |
557 | ||
558 | pr_debug("parsing arg: %s into ", str); | |
559 | ||
48481938 MH |
560 | tmp = strchr(str, '='); |
561 | if (tmp) { | |
02b95dad MH |
562 | arg->name = strndup(str, tmp - str); |
563 | if (arg->name == NULL) | |
564 | return -ENOMEM; | |
11a1ca35 | 565 | pr_debug("name:%s ", arg->name); |
48481938 MH |
566 | str = tmp + 1; |
567 | } | |
568 | ||
11a1ca35 MH |
569 | tmp = strchr(str, ':'); |
570 | if (tmp) { /* Type setting */ | |
571 | *tmp = '\0'; | |
02b95dad MH |
572 | arg->type = strdup(tmp + 1); |
573 | if (arg->type == NULL) | |
574 | return -ENOMEM; | |
11a1ca35 MH |
575 | pr_debug("type:%s ", arg->type); |
576 | } | |
577 | ||
7df2f329 MH |
578 | tmp = strpbrk(str, "-."); |
579 | if (!is_c_varname(str) || !tmp) { | |
580 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
581 | arg->var = strdup(str); |
582 | if (arg->var == NULL) | |
583 | return -ENOMEM; | |
48481938 | 584 | pr_debug("%s\n", arg->var); |
146a1439 | 585 | return 0; |
7df2f329 MH |
586 | } |
587 | ||
588 | /* Structure fields */ | |
02b95dad MH |
589 | arg->var = strndup(str, tmp - str); |
590 | if (arg->var == NULL) | |
591 | return -ENOMEM; | |
48481938 | 592 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
593 | fieldp = &arg->field; |
594 | ||
595 | do { | |
e334016f MH |
596 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
597 | if (*fieldp == NULL) | |
598 | return -ENOMEM; | |
7df2f329 MH |
599 | if (*tmp == '.') { |
600 | str = tmp + 1; | |
601 | (*fieldp)->ref = false; | |
602 | } else if (tmp[1] == '>') { | |
603 | str = tmp + 2; | |
604 | (*fieldp)->ref = true; | |
146a1439 MH |
605 | } else { |
606 | semantic_error("Argument parse error: %s\n", str); | |
607 | return -EINVAL; | |
608 | } | |
7df2f329 MH |
609 | |
610 | tmp = strpbrk(str, "-."); | |
611 | if (tmp) { | |
02b95dad MH |
612 | (*fieldp)->name = strndup(str, tmp - str); |
613 | if ((*fieldp)->name == NULL) | |
614 | return -ENOMEM; | |
7df2f329 MH |
615 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
616 | fieldp = &(*fieldp)->next; | |
617 | } | |
618 | } while (tmp); | |
02b95dad MH |
619 | (*fieldp)->name = strdup(str); |
620 | if ((*fieldp)->name == NULL) | |
621 | return -ENOMEM; | |
7df2f329 | 622 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b MH |
623 | |
624 | /* If no name is specified, set the last field name */ | |
02b95dad MH |
625 | if (!arg->name) { |
626 | arg->name = strdup((*fieldp)->name); | |
627 | if (arg->name == NULL) | |
628 | return -ENOMEM; | |
629 | } | |
146a1439 | 630 | return 0; |
7df2f329 MH |
631 | } |
632 | ||
4235b045 | 633 | /* Parse perf-probe event command */ |
146a1439 | 634 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 635 | { |
e1c01d61 | 636 | char **argv; |
146a1439 | 637 | int argc, i, ret = 0; |
fac13fd5 | 638 | |
4235b045 | 639 | argv = argv_split(cmd, &argc); |
146a1439 MH |
640 | if (!argv) { |
641 | pr_debug("Failed to split arguments.\n"); | |
642 | return -ENOMEM; | |
643 | } | |
644 | if (argc - 1 > MAX_PROBE_ARGS) { | |
645 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
646 | ret = -ERANGE; | |
647 | goto out; | |
648 | } | |
50656eec | 649 | /* Parse probe point */ |
146a1439 MH |
650 | ret = parse_perf_probe_point(argv[0], pev); |
651 | if (ret < 0) | |
652 | goto out; | |
50656eec | 653 | |
e1c01d61 | 654 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 655 | pev->nargs = argc - 1; |
e334016f MH |
656 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
657 | if (pev->args == NULL) { | |
658 | ret = -ENOMEM; | |
659 | goto out; | |
660 | } | |
146a1439 MH |
661 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
662 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
663 | if (ret >= 0 && | |
664 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 665 | semantic_error("You can't specify local variable for" |
146a1439 MH |
666 | " kretprobe.\n"); |
667 | ret = -EINVAL; | |
668 | } | |
e1c01d61 | 669 | } |
146a1439 | 670 | out: |
e1c01d61 | 671 | argv_free(argv); |
146a1439 MH |
672 | |
673 | return ret; | |
50656eec MH |
674 | } |
675 | ||
4235b045 MH |
676 | /* Return true if this perf_probe_event requires debuginfo */ |
677 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
678 | { | |
679 | int i; | |
680 | ||
681 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
682 | return true; | |
683 | ||
684 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 685 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
686 | return true; |
687 | ||
688 | return false; | |
689 | } | |
690 | ||
4de189fe | 691 | /* Parse kprobe_events event into struct probe_point */ |
146a1439 | 692 | int parse_kprobe_trace_command(const char *cmd, struct kprobe_trace_event *tev) |
4de189fe | 693 | { |
4235b045 | 694 | struct kprobe_trace_point *tp = &tev->point; |
4de189fe MH |
695 | char pr; |
696 | char *p; | |
697 | int ret, i, argc; | |
698 | char **argv; | |
699 | ||
4235b045 MH |
700 | pr_debug("Parsing kprobe_events: %s\n", cmd); |
701 | argv = argv_split(cmd, &argc); | |
146a1439 MH |
702 | if (!argv) { |
703 | pr_debug("Failed to split arguments.\n"); | |
704 | return -ENOMEM; | |
705 | } | |
706 | if (argc < 2) { | |
707 | semantic_error("Too few probe arguments.\n"); | |
708 | ret = -ERANGE; | |
709 | goto out; | |
710 | } | |
4de189fe MH |
711 | |
712 | /* Scan event and group name. */ | |
93aaa45a | 713 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
714 | &pr, (float *)(void *)&tev->group, |
715 | (float *)(void *)&tev->event); | |
146a1439 MH |
716 | if (ret != 3) { |
717 | semantic_error("Failed to parse event name: %s\n", argv[0]); | |
718 | ret = -EINVAL; | |
719 | goto out; | |
720 | } | |
4235b045 | 721 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 722 | |
4235b045 | 723 | tp->retprobe = (pr == 'r'); |
4de189fe MH |
724 | |
725 | /* Scan function name and offset */ | |
4235b045 MH |
726 | ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol, |
727 | &tp->offset); | |
4de189fe | 728 | if (ret == 1) |
4235b045 | 729 | tp->offset = 0; |
4de189fe | 730 | |
4235b045 | 731 | tev->nargs = argc - 2; |
e334016f MH |
732 | tev->args = zalloc(sizeof(struct kprobe_trace_arg) * tev->nargs); |
733 | if (tev->args == NULL) { | |
734 | ret = -ENOMEM; | |
735 | goto out; | |
736 | } | |
4235b045 | 737 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
738 | p = strchr(argv[i + 2], '='); |
739 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
740 | *p++ = '\0'; |
741 | else | |
742 | p = argv[i + 2]; | |
02b95dad | 743 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 744 | /* TODO: parse regs and offset */ |
02b95dad MH |
745 | tev->args[i].value = strdup(p); |
746 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
747 | ret = -ENOMEM; | |
748 | goto out; | |
749 | } | |
4de189fe | 750 | } |
146a1439 MH |
751 | ret = 0; |
752 | out: | |
4de189fe | 753 | argv_free(argv); |
146a1439 | 754 | return ret; |
4de189fe MH |
755 | } |
756 | ||
7df2f329 MH |
757 | /* Compose only probe arg */ |
758 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
759 | { | |
760 | struct perf_probe_arg_field *field = pa->field; | |
761 | int ret; | |
762 | char *tmp = buf; | |
763 | ||
48481938 MH |
764 | if (pa->name && pa->var) |
765 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
766 | else | |
767 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
768 | if (ret <= 0) |
769 | goto error; | |
770 | tmp += ret; | |
771 | len -= ret; | |
772 | ||
773 | while (field) { | |
774 | ret = e_snprintf(tmp, len, "%s%s", field->ref ? "->" : ".", | |
775 | field->name); | |
776 | if (ret <= 0) | |
777 | goto error; | |
778 | tmp += ret; | |
779 | len -= ret; | |
780 | field = field->next; | |
781 | } | |
11a1ca35 MH |
782 | |
783 | if (pa->type) { | |
784 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
785 | if (ret <= 0) | |
786 | goto error; | |
787 | tmp += ret; | |
788 | len -= ret; | |
789 | } | |
790 | ||
7df2f329 MH |
791 | return tmp - buf; |
792 | error: | |
146a1439 MH |
793 | pr_debug("Failed to synthesize perf probe argument: %s", |
794 | strerror(-ret)); | |
795 | return ret; | |
7df2f329 MH |
796 | } |
797 | ||
4235b045 MH |
798 | /* Compose only probe point (not argument) */ |
799 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 800 | { |
fb1587d8 MH |
801 | char *buf, *tmp; |
802 | char offs[32] = "", line[32] = "", file[32] = ""; | |
803 | int ret, len; | |
4de189fe | 804 | |
e334016f MH |
805 | buf = zalloc(MAX_CMDLEN); |
806 | if (buf == NULL) { | |
807 | ret = -ENOMEM; | |
808 | goto error; | |
809 | } | |
4de189fe | 810 | if (pp->offset) { |
fb1587d8 | 811 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
812 | if (ret <= 0) |
813 | goto error; | |
814 | } | |
815 | if (pp->line) { | |
fb1587d8 MH |
816 | ret = e_snprintf(line, 32, ":%d", pp->line); |
817 | if (ret <= 0) | |
818 | goto error; | |
819 | } | |
820 | if (pp->file) { | |
dd259c5d | 821 | len = strlen(pp->file) - 31; |
fb1587d8 MH |
822 | if (len < 0) |
823 | len = 0; | |
824 | tmp = strchr(pp->file + len, '/'); | |
825 | if (!tmp) | |
dd259c5d | 826 | tmp = pp->file + len; |
fb1587d8 | 827 | ret = e_snprintf(file, 32, "@%s", tmp + 1); |
4de189fe MH |
828 | if (ret <= 0) |
829 | goto error; | |
830 | } | |
831 | ||
832 | if (pp->function) | |
fb1587d8 MH |
833 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
834 | offs, pp->retprobe ? "%return" : "", line, | |
835 | file); | |
4de189fe | 836 | else |
fb1587d8 | 837 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
838 | if (ret <= 0) |
839 | goto error; | |
840 | ||
841 | return buf; | |
7ef17aaf | 842 | error: |
146a1439 MH |
843 | pr_debug("Failed to synthesize perf probe point: %s", |
844 | strerror(-ret)); | |
e334016f MH |
845 | if (buf) |
846 | free(buf); | |
146a1439 | 847 | return NULL; |
7ef17aaf MH |
848 | } |
849 | ||
4235b045 MH |
850 | #if 0 |
851 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
852 | { |
853 | char *buf; | |
854 | int i, len, ret; | |
855 | ||
4235b045 MH |
856 | buf = synthesize_perf_probe_point(&pev->point); |
857 | if (!buf) | |
858 | return NULL; | |
4de189fe | 859 | |
4235b045 MH |
860 | len = strlen(buf); |
861 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 862 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
863 | pev->args[i].name); |
864 | if (ret <= 0) { | |
865 | free(buf); | |
866 | return NULL; | |
867 | } | |
4de189fe MH |
868 | len += ret; |
869 | } | |
4de189fe | 870 | |
4235b045 MH |
871 | return buf; |
872 | } | |
873 | #endif | |
874 | ||
875 | static int __synthesize_kprobe_trace_arg_ref(struct kprobe_trace_arg_ref *ref, | |
876 | char **buf, size_t *buflen, | |
877 | int depth) | |
878 | { | |
879 | int ret; | |
880 | if (ref->next) { | |
881 | depth = __synthesize_kprobe_trace_arg_ref(ref->next, buf, | |
882 | buflen, depth + 1); | |
883 | if (depth < 0) | |
884 | goto out; | |
885 | } | |
886 | ||
887 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
888 | if (ret < 0) | |
889 | depth = ret; | |
890 | else { | |
891 | *buf += ret; | |
892 | *buflen -= ret; | |
893 | } | |
894 | out: | |
895 | return depth; | |
4de189fe | 896 | |
4de189fe MH |
897 | } |
898 | ||
4235b045 MH |
899 | static int synthesize_kprobe_trace_arg(struct kprobe_trace_arg *arg, |
900 | char *buf, size_t buflen) | |
50656eec | 901 | { |
4235b045 MH |
902 | int ret, depth = 0; |
903 | char *tmp = buf; | |
904 | ||
905 | /* Argument name or separator */ | |
906 | if (arg->name) | |
907 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
908 | else | |
909 | ret = e_snprintf(buf, buflen, " "); | |
910 | if (ret < 0) | |
911 | return ret; | |
912 | buf += ret; | |
913 | buflen -= ret; | |
914 | ||
915 | /* Dereferencing arguments */ | |
916 | if (arg->ref) { | |
917 | depth = __synthesize_kprobe_trace_arg_ref(arg->ref, &buf, | |
918 | &buflen, 1); | |
919 | if (depth < 0) | |
920 | return depth; | |
921 | } | |
922 | ||
923 | /* Print argument value */ | |
924 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
925 | if (ret < 0) | |
926 | return ret; | |
927 | buf += ret; | |
928 | buflen -= ret; | |
929 | ||
930 | /* Closing */ | |
931 | while (depth--) { | |
932 | ret = e_snprintf(buf, buflen, ")"); | |
933 | if (ret < 0) | |
934 | return ret; | |
935 | buf += ret; | |
936 | buflen -= ret; | |
937 | } | |
4984912e MH |
938 | /* Print argument type */ |
939 | if (arg->type) { | |
940 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
941 | if (ret <= 0) | |
942 | return ret; | |
943 | buf += ret; | |
944 | } | |
4235b045 MH |
945 | |
946 | return buf - tmp; | |
947 | } | |
948 | ||
949 | char *synthesize_kprobe_trace_command(struct kprobe_trace_event *tev) | |
950 | { | |
951 | struct kprobe_trace_point *tp = &tev->point; | |
50656eec MH |
952 | char *buf; |
953 | int i, len, ret; | |
954 | ||
e334016f MH |
955 | buf = zalloc(MAX_CMDLEN); |
956 | if (buf == NULL) | |
957 | return NULL; | |
958 | ||
4235b045 MH |
959 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu", |
960 | tp->retprobe ? 'r' : 'p', | |
961 | tev->group, tev->event, | |
962 | tp->symbol, tp->offset); | |
963 | if (len <= 0) | |
50656eec | 964 | goto error; |
50656eec | 965 | |
4235b045 MH |
966 | for (i = 0; i < tev->nargs; i++) { |
967 | ret = synthesize_kprobe_trace_arg(&tev->args[i], buf + len, | |
968 | MAX_CMDLEN - len); | |
4de189fe | 969 | if (ret <= 0) |
50656eec MH |
970 | goto error; |
971 | len += ret; | |
972 | } | |
50656eec | 973 | |
4235b045 | 974 | return buf; |
50656eec | 975 | error: |
4235b045 MH |
976 | free(buf); |
977 | return NULL; | |
978 | } | |
50656eec | 979 | |
146a1439 MH |
980 | int convert_to_perf_probe_event(struct kprobe_trace_event *tev, |
981 | struct perf_probe_event *pev) | |
4235b045 | 982 | { |
02b95dad | 983 | char buf[64] = ""; |
146a1439 | 984 | int i, ret; |
4235b045 | 985 | |
4b4da7f7 | 986 | /* Convert event/group name */ |
02b95dad MH |
987 | pev->event = strdup(tev->event); |
988 | pev->group = strdup(tev->group); | |
989 | if (pev->event == NULL || pev->group == NULL) | |
990 | return -ENOMEM; | |
fb1587d8 | 991 | |
4b4da7f7 | 992 | /* Convert trace_point to probe_point */ |
146a1439 MH |
993 | ret = convert_to_perf_probe_point(&tev->point, &pev->point); |
994 | if (ret < 0) | |
995 | return ret; | |
4b4da7f7 | 996 | |
4235b045 MH |
997 | /* Convert trace_arg to probe_arg */ |
998 | pev->nargs = tev->nargs; | |
e334016f MH |
999 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1000 | if (pev->args == NULL) | |
1001 | return -ENOMEM; | |
02b95dad | 1002 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1003 | if (tev->args[i].name) |
02b95dad | 1004 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1005 | else { |
146a1439 MH |
1006 | ret = synthesize_kprobe_trace_arg(&tev->args[i], |
1007 | buf, 64); | |
02b95dad | 1008 | pev->args[i].name = strdup(buf); |
4235b045 | 1009 | } |
02b95dad MH |
1010 | if (pev->args[i].name == NULL && ret >= 0) |
1011 | ret = -ENOMEM; | |
1012 | } | |
146a1439 MH |
1013 | |
1014 | if (ret < 0) | |
1015 | clear_perf_probe_event(pev); | |
1016 | ||
1017 | return ret; | |
4235b045 MH |
1018 | } |
1019 | ||
1020 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1021 | { | |
1022 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1023 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1024 | int i; |
1025 | ||
1026 | if (pev->event) | |
1027 | free(pev->event); | |
1028 | if (pev->group) | |
1029 | free(pev->group); | |
1030 | if (pp->file) | |
1031 | free(pp->file); | |
1032 | if (pp->function) | |
1033 | free(pp->function); | |
1034 | if (pp->lazy_line) | |
1035 | free(pp->lazy_line); | |
7df2f329 | 1036 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1037 | if (pev->args[i].name) |
1038 | free(pev->args[i].name); | |
48481938 MH |
1039 | if (pev->args[i].var) |
1040 | free(pev->args[i].var); | |
11a1ca35 MH |
1041 | if (pev->args[i].type) |
1042 | free(pev->args[i].type); | |
7df2f329 MH |
1043 | field = pev->args[i].field; |
1044 | while (field) { | |
1045 | next = field->next; | |
1046 | if (field->name) | |
1047 | free(field->name); | |
1048 | free(field); | |
1049 | field = next; | |
1050 | } | |
1051 | } | |
4235b045 MH |
1052 | if (pev->args) |
1053 | free(pev->args); | |
1054 | memset(pev, 0, sizeof(*pev)); | |
1055 | } | |
1056 | ||
1057 | void clear_kprobe_trace_event(struct kprobe_trace_event *tev) | |
1058 | { | |
1059 | struct kprobe_trace_arg_ref *ref, *next; | |
1060 | int i; | |
1061 | ||
1062 | if (tev->event) | |
1063 | free(tev->event); | |
1064 | if (tev->group) | |
1065 | free(tev->group); | |
1066 | if (tev->point.symbol) | |
1067 | free(tev->point.symbol); | |
1068 | for (i = 0; i < tev->nargs; i++) { | |
1069 | if (tev->args[i].name) | |
1070 | free(tev->args[i].name); | |
1071 | if (tev->args[i].value) | |
1072 | free(tev->args[i].value); | |
4984912e MH |
1073 | if (tev->args[i].type) |
1074 | free(tev->args[i].type); | |
4235b045 MH |
1075 | ref = tev->args[i].ref; |
1076 | while (ref) { | |
1077 | next = ref->next; | |
1078 | free(ref); | |
1079 | ref = next; | |
1080 | } | |
1081 | } | |
1082 | if (tev->args) | |
1083 | free(tev->args); | |
1084 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1085 | } |
1086 | ||
f4d7da49 | 1087 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
1088 | { |
1089 | char buf[PATH_MAX]; | |
7ca5989d | 1090 | const char *__debugfs; |
4de189fe MH |
1091 | int ret; |
1092 | ||
7ca5989d MH |
1093 | __debugfs = debugfs_find_mountpoint(); |
1094 | if (__debugfs == NULL) { | |
1095 | pr_warning("Debugfs is not mounted.\n"); | |
1096 | return -ENOENT; | |
1097 | } | |
1098 | ||
1099 | ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); | |
146a1439 | 1100 | if (ret >= 0) { |
7ca5989d | 1101 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1102 | if (readwrite && !probe_event_dry_run) |
1103 | ret = open(buf, O_RDWR, O_APPEND); | |
1104 | else | |
1105 | ret = open(buf, O_RDONLY, 0); | |
1106 | } | |
f4d7da49 | 1107 | |
4de189fe MH |
1108 | if (ret < 0) { |
1109 | if (errno == ENOENT) | |
146a1439 MH |
1110 | pr_warning("kprobe_events file does not exist - please" |
1111 | " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); | |
4de189fe | 1112 | else |
146a1439 MH |
1113 | pr_warning("Failed to open kprobe_events file: %s\n", |
1114 | strerror(errno)); | |
4de189fe MH |
1115 | } |
1116 | return ret; | |
1117 | } | |
1118 | ||
1119 | /* Get raw string list of current kprobe_events */ | |
4235b045 | 1120 | static struct strlist *get_kprobe_trace_command_rawlist(int fd) |
4de189fe MH |
1121 | { |
1122 | int ret, idx; | |
1123 | FILE *fp; | |
1124 | char buf[MAX_CMDLEN]; | |
1125 | char *p; | |
1126 | struct strlist *sl; | |
1127 | ||
1128 | sl = strlist__new(true, NULL); | |
1129 | ||
1130 | fp = fdopen(dup(fd), "r"); | |
1131 | while (!feof(fp)) { | |
1132 | p = fgets(buf, MAX_CMDLEN, fp); | |
1133 | if (!p) | |
1134 | break; | |
1135 | ||
1136 | idx = strlen(p) - 1; | |
1137 | if (p[idx] == '\n') | |
1138 | p[idx] = '\0'; | |
1139 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1140 | if (ret < 0) { |
1141 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1142 | strlist__delete(sl); | |
1143 | return NULL; | |
1144 | } | |
4de189fe MH |
1145 | } |
1146 | fclose(fp); | |
1147 | ||
1148 | return sl; | |
1149 | } | |
1150 | ||
278498d4 | 1151 | /* Show an event */ |
146a1439 | 1152 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1153 | { |
7e990a51 | 1154 | int i, ret; |
278498d4 | 1155 | char buf[128]; |
4235b045 | 1156 | char *place; |
278498d4 | 1157 | |
4235b045 MH |
1158 | /* Synthesize only event probe point */ |
1159 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1160 | if (!place) |
1161 | return -EINVAL; | |
4235b045 MH |
1162 | |
1163 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1164 | if (ret < 0) |
146a1439 MH |
1165 | return ret; |
1166 | ||
fb1587d8 | 1167 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1168 | |
4235b045 | 1169 | if (pev->nargs > 0) { |
278498d4 | 1170 | printf(" with"); |
7df2f329 | 1171 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1172 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1173 | buf, 128); | |
1174 | if (ret < 0) | |
1175 | break; | |
7df2f329 MH |
1176 | printf(" %s", buf); |
1177 | } | |
278498d4 MH |
1178 | } |
1179 | printf(")\n"); | |
4235b045 | 1180 | free(place); |
146a1439 | 1181 | return ret; |
278498d4 MH |
1182 | } |
1183 | ||
4de189fe | 1184 | /* List up current perf-probe events */ |
146a1439 | 1185 | int show_perf_probe_events(void) |
4de189fe | 1186 | { |
146a1439 | 1187 | int fd, ret; |
4235b045 MH |
1188 | struct kprobe_trace_event tev; |
1189 | struct perf_probe_event pev; | |
4de189fe MH |
1190 | struct strlist *rawlist; |
1191 | struct str_node *ent; | |
1192 | ||
72041334 | 1193 | setup_pager(); |
146a1439 MH |
1194 | ret = init_vmlinux(); |
1195 | if (ret < 0) | |
1196 | return ret; | |
4235b045 MH |
1197 | |
1198 | memset(&tev, 0, sizeof(tev)); | |
1199 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1200 | |
f4d7da49 | 1201 | fd = open_kprobe_events(false); |
146a1439 MH |
1202 | if (fd < 0) |
1203 | return fd; | |
1204 | ||
4235b045 | 1205 | rawlist = get_kprobe_trace_command_rawlist(fd); |
4de189fe | 1206 | close(fd); |
146a1439 MH |
1207 | if (!rawlist) |
1208 | return -ENOENT; | |
4de189fe | 1209 | |
adf365f4 | 1210 | strlist__for_each(ent, rawlist) { |
146a1439 MH |
1211 | ret = parse_kprobe_trace_command(ent->s, &tev); |
1212 | if (ret >= 0) { | |
1213 | ret = convert_to_perf_probe_event(&tev, &pev); | |
1214 | if (ret >= 0) | |
1215 | ret = show_perf_probe_event(&pev); | |
1216 | } | |
4235b045 MH |
1217 | clear_perf_probe_event(&pev); |
1218 | clear_kprobe_trace_event(&tev); | |
146a1439 MH |
1219 | if (ret < 0) |
1220 | break; | |
4de189fe | 1221 | } |
4de189fe | 1222 | strlist__delete(rawlist); |
146a1439 MH |
1223 | |
1224 | return ret; | |
4de189fe MH |
1225 | } |
1226 | ||
b498ce1f | 1227 | /* Get current perf-probe event names */ |
4235b045 | 1228 | static struct strlist *get_kprobe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1229 | { |
fa28244d | 1230 | char buf[128]; |
b498ce1f MH |
1231 | struct strlist *sl, *rawlist; |
1232 | struct str_node *ent; | |
4235b045 | 1233 | struct kprobe_trace_event tev; |
146a1439 | 1234 | int ret = 0; |
b498ce1f | 1235 | |
4235b045 | 1236 | memset(&tev, 0, sizeof(tev)); |
b498ce1f | 1237 | |
4235b045 | 1238 | rawlist = get_kprobe_trace_command_rawlist(fd); |
e1d2017b | 1239 | sl = strlist__new(true, NULL); |
adf365f4 | 1240 | strlist__for_each(ent, rawlist) { |
146a1439 MH |
1241 | ret = parse_kprobe_trace_command(ent->s, &tev); |
1242 | if (ret < 0) | |
1243 | break; | |
fa28244d | 1244 | if (include_group) { |
146a1439 MH |
1245 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1246 | tev.event); | |
1247 | if (ret >= 0) | |
1248 | ret = strlist__add(sl, buf); | |
fa28244d | 1249 | } else |
146a1439 | 1250 | ret = strlist__add(sl, tev.event); |
4235b045 | 1251 | clear_kprobe_trace_event(&tev); |
146a1439 MH |
1252 | if (ret < 0) |
1253 | break; | |
b498ce1f | 1254 | } |
b498ce1f MH |
1255 | strlist__delete(rawlist); |
1256 | ||
146a1439 MH |
1257 | if (ret < 0) { |
1258 | strlist__delete(sl); | |
1259 | return NULL; | |
1260 | } | |
b498ce1f MH |
1261 | return sl; |
1262 | } | |
1263 | ||
146a1439 | 1264 | static int write_kprobe_trace_event(int fd, struct kprobe_trace_event *tev) |
50656eec MH |
1265 | { |
1266 | int ret; | |
4235b045 | 1267 | char *buf = synthesize_kprobe_trace_command(tev); |
50656eec | 1268 | |
146a1439 MH |
1269 | if (!buf) { |
1270 | pr_debug("Failed to synthesize kprobe trace event.\n"); | |
1271 | return -EINVAL; | |
1272 | } | |
1273 | ||
fa28244d | 1274 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1275 | if (!probe_event_dry_run) { |
1276 | ret = write(fd, buf, strlen(buf)); | |
1277 | if (ret <= 0) | |
146a1439 MH |
1278 | pr_warning("Failed to write event: %s\n", |
1279 | strerror(errno)); | |
f4d7da49 | 1280 | } |
4235b045 | 1281 | free(buf); |
146a1439 | 1282 | return ret; |
50656eec MH |
1283 | } |
1284 | ||
146a1439 MH |
1285 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1286 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1287 | { |
1288 | int i, ret; | |
17f88fcd MH |
1289 | |
1290 | /* Try no suffix */ | |
1291 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1292 | if (ret < 0) { |
1293 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1294 | return ret; | |
1295 | } | |
17f88fcd | 1296 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1297 | return 0; |
17f88fcd | 1298 | |
d761b08b MH |
1299 | if (!allow_suffix) { |
1300 | pr_warning("Error: event \"%s\" already exists. " | |
1301 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1302 | return -EEXIST; |
d761b08b MH |
1303 | } |
1304 | ||
17f88fcd MH |
1305 | /* Try to add suffix */ |
1306 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1307 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1308 | if (ret < 0) { |
1309 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1310 | return ret; | |
1311 | } | |
b498ce1f MH |
1312 | if (!strlist__has_entry(namelist, buf)) |
1313 | break; | |
1314 | } | |
146a1439 MH |
1315 | if (i == MAX_EVENT_INDEX) { |
1316 | pr_warning("Too many events are on the same function.\n"); | |
1317 | ret = -ERANGE; | |
1318 | } | |
1319 | ||
1320 | return ret; | |
b498ce1f MH |
1321 | } |
1322 | ||
146a1439 MH |
1323 | static int __add_kprobe_trace_events(struct perf_probe_event *pev, |
1324 | struct kprobe_trace_event *tevs, | |
1325 | int ntevs, bool allow_suffix) | |
50656eec | 1326 | { |
146a1439 | 1327 | int i, fd, ret; |
55632770 | 1328 | struct kprobe_trace_event *tev = NULL; |
4235b045 MH |
1329 | char buf[64]; |
1330 | const char *event, *group; | |
b498ce1f | 1331 | struct strlist *namelist; |
50656eec | 1332 | |
f4d7da49 | 1333 | fd = open_kprobe_events(true); |
146a1439 MH |
1334 | if (fd < 0) |
1335 | return fd; | |
b498ce1f | 1336 | /* Get current event names */ |
4235b045 | 1337 | namelist = get_kprobe_trace_event_names(fd, false); |
146a1439 MH |
1338 | if (!namelist) { |
1339 | pr_debug("Failed to get current event list.\n"); | |
1340 | return -EIO; | |
1341 | } | |
4235b045 | 1342 | |
146a1439 | 1343 | ret = 0; |
4235b045 | 1344 | printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1345 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1346 | tev = &tevs[i]; |
1347 | if (pev->event) | |
1348 | event = pev->event; | |
1349 | else | |
1350 | if (pev->point.function) | |
1351 | event = pev->point.function; | |
1352 | else | |
1353 | event = tev->point.symbol; | |
1354 | if (pev->group) | |
1355 | group = pev->group; | |
1356 | else | |
1357 | group = PERFPROBE_GROUP; | |
1358 | ||
1359 | /* Get an unused new event name */ | |
146a1439 MH |
1360 | ret = get_new_event_name(buf, 64, event, |
1361 | namelist, allow_suffix); | |
1362 | if (ret < 0) | |
1363 | break; | |
4235b045 MH |
1364 | event = buf; |
1365 | ||
02b95dad MH |
1366 | tev->event = strdup(event); |
1367 | tev->group = strdup(group); | |
1368 | if (tev->event == NULL || tev->group == NULL) { | |
1369 | ret = -ENOMEM; | |
1370 | break; | |
1371 | } | |
146a1439 MH |
1372 | ret = write_kprobe_trace_event(fd, tev); |
1373 | if (ret < 0) | |
1374 | break; | |
4235b045 MH |
1375 | /* Add added event name to namelist */ |
1376 | strlist__add(namelist, event); | |
1377 | ||
1378 | /* Trick here - save current event/group */ | |
1379 | event = pev->event; | |
1380 | group = pev->group; | |
1381 | pev->event = tev->event; | |
1382 | pev->group = tev->group; | |
1383 | show_perf_probe_event(pev); | |
1384 | /* Trick here - restore current event/group */ | |
1385 | pev->event = (char *)event; | |
1386 | pev->group = (char *)group; | |
1387 | ||
1388 | /* | |
1389 | * Probes after the first probe which comes from same | |
1390 | * user input are always allowed to add suffix, because | |
1391 | * there might be several addresses corresponding to | |
1392 | * one code line. | |
1393 | */ | |
1394 | allow_suffix = true; | |
50656eec | 1395 | } |
146a1439 MH |
1396 | |
1397 | if (ret >= 0) { | |
1398 | /* Show how to use the event. */ | |
1399 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
1400 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
1401 | tev->event); | |
1402 | } | |
a9b495b0 | 1403 | |
e1d2017b | 1404 | strlist__delete(namelist); |
50656eec | 1405 | close(fd); |
146a1439 | 1406 | return ret; |
50656eec | 1407 | } |
fa28244d | 1408 | |
4235b045 MH |
1409 | static int convert_to_kprobe_trace_events(struct perf_probe_event *pev, |
1410 | struct kprobe_trace_event **tevs) | |
e0faa8d3 MH |
1411 | { |
1412 | struct symbol *sym; | |
e334016f | 1413 | int ret = 0, i; |
4235b045 MH |
1414 | struct kprobe_trace_event *tev; |
1415 | ||
4b4da7f7 | 1416 | /* Convert perf_probe_event with debuginfo */ |
e334016f MH |
1417 | ret = try_to_find_kprobe_trace_events(pev, tevs); |
1418 | if (ret != 0) | |
1419 | return ret; | |
e0faa8d3 | 1420 | |
4235b045 | 1421 | /* Allocate trace event buffer */ |
e334016f MH |
1422 | tev = *tevs = zalloc(sizeof(struct kprobe_trace_event)); |
1423 | if (tev == NULL) | |
1424 | return -ENOMEM; | |
4235b045 MH |
1425 | |
1426 | /* Copy parameters */ | |
02b95dad MH |
1427 | tev->point.symbol = strdup(pev->point.function); |
1428 | if (tev->point.symbol == NULL) { | |
1429 | ret = -ENOMEM; | |
1430 | goto error; | |
1431 | } | |
4235b045 MH |
1432 | tev->point.offset = pev->point.offset; |
1433 | tev->nargs = pev->nargs; | |
1434 | if (tev->nargs) { | |
e334016f MH |
1435 | tev->args = zalloc(sizeof(struct kprobe_trace_arg) |
1436 | * tev->nargs); | |
1437 | if (tev->args == NULL) { | |
02b95dad MH |
1438 | ret = -ENOMEM; |
1439 | goto error; | |
e334016f | 1440 | } |
48481938 | 1441 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1442 | if (pev->args[i].name) { |
1443 | tev->args[i].name = strdup(pev->args[i].name); | |
1444 | if (tev->args[i].name == NULL) { | |
1445 | ret = -ENOMEM; | |
1446 | goto error; | |
1447 | } | |
1448 | } | |
1449 | tev->args[i].value = strdup(pev->args[i].var); | |
1450 | if (tev->args[i].value == NULL) { | |
1451 | ret = -ENOMEM; | |
1452 | goto error; | |
1453 | } | |
1454 | if (pev->args[i].type) { | |
1455 | tev->args[i].type = strdup(pev->args[i].type); | |
1456 | if (tev->args[i].type == NULL) { | |
1457 | ret = -ENOMEM; | |
1458 | goto error; | |
1459 | } | |
1460 | } | |
48481938 | 1461 | } |
4235b045 MH |
1462 | } |
1463 | ||
1464 | /* Currently just checking function name from symbol map */ | |
1465 | sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION], | |
1466 | tev->point.symbol, NULL); | |
146a1439 MH |
1467 | if (!sym) { |
1468 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1469 | tev->point.symbol); | |
02b95dad MH |
1470 | ret = -ENOENT; |
1471 | goto error; | |
1472 | } | |
e334016f | 1473 | |
02b95dad MH |
1474 | return 1; |
1475 | error: | |
1476 | clear_kprobe_trace_event(tev); | |
1477 | free(tev); | |
1478 | *tevs = NULL; | |
e334016f | 1479 | return ret; |
4235b045 MH |
1480 | } |
1481 | ||
1482 | struct __event_package { | |
1483 | struct perf_probe_event *pev; | |
1484 | struct kprobe_trace_event *tevs; | |
1485 | int ntevs; | |
1486 | }; | |
1487 | ||
146a1439 MH |
1488 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
1489 | bool force_add) | |
4235b045 | 1490 | { |
146a1439 | 1491 | int i, j, ret; |
4235b045 MH |
1492 | struct __event_package *pkgs; |
1493 | ||
e334016f MH |
1494 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
1495 | if (pkgs == NULL) | |
1496 | return -ENOMEM; | |
4235b045 MH |
1497 | |
1498 | /* Init vmlinux path */ | |
146a1439 MH |
1499 | ret = init_vmlinux(); |
1500 | if (ret < 0) | |
1501 | return ret; | |
4235b045 MH |
1502 | |
1503 | /* Loop 1: convert all events */ | |
1504 | for (i = 0; i < npevs; i++) { | |
1505 | pkgs[i].pev = &pevs[i]; | |
1506 | /* Convert with or without debuginfo */ | |
146a1439 MH |
1507 | ret = convert_to_kprobe_trace_events(pkgs[i].pev, |
1508 | &pkgs[i].tevs); | |
1509 | if (ret < 0) | |
1510 | goto end; | |
1511 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
1512 | } |
1513 | ||
4235b045 | 1514 | /* Loop 2: add all events */ |
146a1439 MH |
1515 | for (i = 0; i < npevs && ret >= 0; i++) |
1516 | ret = __add_kprobe_trace_events(pkgs[i].pev, pkgs[i].tevs, | |
1517 | pkgs[i].ntevs, force_add); | |
1518 | end: | |
1519 | /* Loop 3: cleanup trace events */ | |
4235b045 | 1520 | for (i = 0; i < npevs; i++) |
146a1439 MH |
1521 | for (j = 0; j < pkgs[i].ntevs; j++) |
1522 | clear_kprobe_trace_event(&pkgs[i].tevs[j]); | |
1523 | ||
1524 | return ret; | |
e0faa8d3 MH |
1525 | } |
1526 | ||
146a1439 | 1527 | static int __del_trace_kprobe_event(int fd, struct str_node *ent) |
bbbb521b MH |
1528 | { |
1529 | char *p; | |
1530 | char buf[128]; | |
4235b045 | 1531 | int ret; |
bbbb521b MH |
1532 | |
1533 | /* Convert from perf-probe event to trace-kprobe event */ | |
146a1439 MH |
1534 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
1535 | if (ret < 0) | |
1536 | goto error; | |
1537 | ||
bbbb521b | 1538 | p = strchr(buf + 2, ':'); |
146a1439 MH |
1539 | if (!p) { |
1540 | pr_debug("Internal error: %s should have ':' but not.\n", | |
1541 | ent->s); | |
1542 | ret = -ENOTSUP; | |
1543 | goto error; | |
1544 | } | |
bbbb521b MH |
1545 | *p = '/'; |
1546 | ||
4235b045 MH |
1547 | pr_debug("Writing event: %s\n", buf); |
1548 | ret = write(fd, buf, strlen(buf)); | |
146a1439 MH |
1549 | if (ret < 0) |
1550 | goto error; | |
1551 | ||
bbbb521b | 1552 | printf("Remove event: %s\n", ent->s); |
146a1439 MH |
1553 | return 0; |
1554 | error: | |
1555 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
1556 | return ret; | |
bbbb521b MH |
1557 | } |
1558 | ||
146a1439 MH |
1559 | static int del_trace_kprobe_event(int fd, const char *group, |
1560 | const char *event, struct strlist *namelist) | |
fa28244d MH |
1561 | { |
1562 | char buf[128]; | |
bbbb521b | 1563 | struct str_node *ent, *n; |
146a1439 | 1564 | int found = 0, ret = 0; |
fa28244d | 1565 | |
146a1439 MH |
1566 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
1567 | if (ret < 0) { | |
1568 | pr_err("Failed to copy event."); | |
1569 | return ret; | |
1570 | } | |
fa28244d | 1571 | |
bbbb521b MH |
1572 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
1573 | strlist__for_each_safe(ent, n, namelist) | |
1574 | if (strglobmatch(ent->s, buf)) { | |
1575 | found++; | |
146a1439 MH |
1576 | ret = __del_trace_kprobe_event(fd, ent); |
1577 | if (ret < 0) | |
1578 | break; | |
bbbb521b MH |
1579 | strlist__remove(namelist, ent); |
1580 | } | |
1581 | } else { | |
1582 | ent = strlist__find(namelist, buf); | |
1583 | if (ent) { | |
1584 | found++; | |
146a1439 MH |
1585 | ret = __del_trace_kprobe_event(fd, ent); |
1586 | if (ret >= 0) | |
1587 | strlist__remove(namelist, ent); | |
bbbb521b MH |
1588 | } |
1589 | } | |
146a1439 MH |
1590 | if (found == 0 && ret >= 0) |
1591 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
1592 | ||
1593 | return ret; | |
fa28244d MH |
1594 | } |
1595 | ||
146a1439 | 1596 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 1597 | { |
146a1439 | 1598 | int fd, ret = 0; |
fa28244d MH |
1599 | const char *group, *event; |
1600 | char *p, *str; | |
1601 | struct str_node *ent; | |
1602 | struct strlist *namelist; | |
1603 | ||
f4d7da49 | 1604 | fd = open_kprobe_events(true); |
146a1439 MH |
1605 | if (fd < 0) |
1606 | return fd; | |
1607 | ||
fa28244d | 1608 | /* Get current event names */ |
4235b045 | 1609 | namelist = get_kprobe_trace_event_names(fd, true); |
146a1439 MH |
1610 | if (namelist == NULL) |
1611 | return -EINVAL; | |
fa28244d | 1612 | |
adf365f4 | 1613 | strlist__for_each(ent, dellist) { |
02b95dad MH |
1614 | str = strdup(ent->s); |
1615 | if (str == NULL) { | |
1616 | ret = -ENOMEM; | |
1617 | break; | |
1618 | } | |
bbbb521b | 1619 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
1620 | p = strchr(str, ':'); |
1621 | if (p) { | |
1622 | group = str; | |
1623 | *p = '\0'; | |
1624 | event = p + 1; | |
1625 | } else { | |
bbbb521b | 1626 | group = "*"; |
fa28244d MH |
1627 | event = str; |
1628 | } | |
bbbb521b | 1629 | pr_debug("Group: %s, Event: %s\n", group, event); |
146a1439 | 1630 | ret = del_trace_kprobe_event(fd, group, event, namelist); |
fa28244d | 1631 | free(str); |
146a1439 MH |
1632 | if (ret < 0) |
1633 | break; | |
fa28244d MH |
1634 | } |
1635 | strlist__delete(namelist); | |
1636 | close(fd); | |
146a1439 MH |
1637 | |
1638 | return ret; | |
fa28244d MH |
1639 | } |
1640 |