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, | |
ef4a3565 MH |
153 | struct kprobe_trace_event **tevs, |
154 | int max_tevs) | |
4b4da7f7 MH |
155 | { |
156 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
157 | int fd, ntevs; | |
158 | ||
159 | fd = open_vmlinux(); | |
160 | if (fd < 0) { | |
146a1439 MH |
161 | if (need_dwarf) { |
162 | pr_warning("Failed to open debuginfo file.\n"); | |
163 | return fd; | |
164 | } | |
4b4da7f7 MH |
165 | pr_debug("Could not open vmlinux. Try to use symbols.\n"); |
166 | return 0; | |
167 | } | |
168 | ||
169 | /* Searching trace events corresponding to probe event */ | |
ef4a3565 | 170 | ntevs = find_kprobe_trace_events(fd, pev, tevs, max_tevs); |
4b4da7f7 MH |
171 | close(fd); |
172 | ||
146a1439 MH |
173 | if (ntevs > 0) { /* Succeeded to find trace events */ |
174 | pr_debug("find %d kprobe_trace_events.\n", ntevs); | |
4b4da7f7 | 175 | return ntevs; |
146a1439 | 176 | } |
4b4da7f7 | 177 | |
146a1439 MH |
178 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
179 | pr_warning("Probe point '%s' not found.\n", | |
180 | synthesize_perf_probe_point(&pev->point)); | |
181 | return -ENOENT; | |
182 | } | |
183 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
184 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
185 | if (ntevs == -EBADF) { | |
186 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
187 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
188 | if (!need_dwarf) { | |
189 | pr_debug("Trying to use symbols.\nn"); | |
190 | return 0; | |
191 | } | |
4b4da7f7 | 192 | } |
15eca306 | 193 | return ntevs; |
4b4da7f7 MH |
194 | } |
195 | ||
196 | #define LINEBUF_SIZE 256 | |
197 | #define NR_ADDITIONAL_LINES 2 | |
198 | ||
d3b63d7a | 199 | static int show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
200 | { |
201 | char buf[LINEBUF_SIZE]; | |
202 | const char *color = PERF_COLOR_BLUE; | |
203 | ||
204 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
205 | goto error; | |
206 | if (!skip) { | |
207 | if (show_num) | |
d3b63d7a | 208 | fprintf(stdout, "%7d %s", l, buf); |
4b4da7f7 MH |
209 | else |
210 | color_fprintf(stdout, color, " %s", buf); | |
211 | } | |
212 | ||
213 | while (strlen(buf) == LINEBUF_SIZE - 1 && | |
214 | buf[LINEBUF_SIZE - 2] != '\n') { | |
215 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
216 | goto error; | |
217 | if (!skip) { | |
218 | if (show_num) | |
219 | fprintf(stdout, "%s", buf); | |
220 | else | |
221 | color_fprintf(stdout, color, "%s", buf); | |
222 | } | |
223 | } | |
146a1439 MH |
224 | |
225 | return 0; | |
4b4da7f7 MH |
226 | error: |
227 | if (feof(fp)) | |
146a1439 | 228 | pr_warning("Source file is shorter than expected.\n"); |
4b4da7f7 | 229 | else |
146a1439 MH |
230 | pr_warning("File read error: %s\n", strerror(errno)); |
231 | ||
232 | return -1; | |
4b4da7f7 MH |
233 | } |
234 | ||
235 | /* | |
236 | * Show line-range always requires debuginfo to find source file and | |
237 | * line number. | |
238 | */ | |
146a1439 | 239 | int show_line_range(struct line_range *lr) |
4b4da7f7 | 240 | { |
d3b63d7a | 241 | int l = 1; |
4b4da7f7 MH |
242 | struct line_node *ln; |
243 | FILE *fp; | |
244 | int fd, ret; | |
245 | ||
246 | /* Search a line range */ | |
146a1439 MH |
247 | ret = init_vmlinux(); |
248 | if (ret < 0) | |
249 | return ret; | |
250 | ||
4b4da7f7 | 251 | fd = open_vmlinux(); |
146a1439 MH |
252 | if (fd < 0) { |
253 | pr_warning("Failed to open debuginfo file.\n"); | |
254 | return fd; | |
255 | } | |
256 | ||
4b4da7f7 | 257 | ret = find_line_range(fd, lr); |
4b4da7f7 | 258 | close(fd); |
146a1439 MH |
259 | if (ret == 0) { |
260 | pr_warning("Specified source line is not found.\n"); | |
261 | return -ENOENT; | |
262 | } else if (ret < 0) { | |
263 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
264 | return ret; | |
265 | } | |
4b4da7f7 MH |
266 | |
267 | setup_pager(); | |
268 | ||
269 | if (lr->function) | |
270 | fprintf(stdout, "<%s:%d>\n", lr->function, | |
271 | lr->start - lr->offset); | |
272 | else | |
273 | fprintf(stdout, "<%s:%d>\n", lr->file, lr->start); | |
274 | ||
275 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
276 | if (fp == NULL) { |
277 | pr_warning("Failed to open %s: %s\n", lr->path, | |
278 | strerror(errno)); | |
279 | return -errno; | |
280 | } | |
4b4da7f7 | 281 | /* Skip to starting line number */ |
146a1439 MH |
282 | while (l < lr->start && ret >= 0) |
283 | ret = show_one_line(fp, l++, true, false); | |
284 | if (ret < 0) | |
285 | goto end; | |
4b4da7f7 MH |
286 | |
287 | list_for_each_entry(ln, &lr->line_list, list) { | |
146a1439 MH |
288 | while (ln->line > l && ret >= 0) |
289 | ret = show_one_line(fp, (l++) - lr->offset, | |
290 | false, false); | |
291 | if (ret >= 0) | |
292 | ret = show_one_line(fp, (l++) - lr->offset, | |
293 | false, true); | |
294 | if (ret < 0) | |
295 | goto end; | |
4b4da7f7 MH |
296 | } |
297 | ||
298 | if (lr->end == INT_MAX) | |
299 | lr->end = l + NR_ADDITIONAL_LINES; | |
dda4ab34 | 300 | while (l <= lr->end && !feof(fp) && ret >= 0) |
146a1439 MH |
301 | ret = show_one_line(fp, (l++) - lr->offset, false, false); |
302 | end: | |
4b4da7f7 | 303 | fclose(fp); |
146a1439 | 304 | return ret; |
4b4da7f7 MH |
305 | } |
306 | ||
307 | #else /* !DWARF_SUPPORT */ | |
308 | ||
146a1439 | 309 | static int convert_to_perf_probe_point(struct kprobe_trace_point *tp, |
4b4da7f7 MH |
310 | struct perf_probe_point *pp) |
311 | { | |
02b95dad MH |
312 | pp->function = strdup(tp->symbol); |
313 | if (pp->function == NULL) | |
314 | return -ENOMEM; | |
4b4da7f7 MH |
315 | pp->offset = tp->offset; |
316 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
317 | |
318 | return 0; | |
4b4da7f7 MH |
319 | } |
320 | ||
321 | static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, | |
ef4a3565 MH |
322 | struct kprobe_trace_event **tevs __unused, |
323 | int max_tevs __unused) | |
4b4da7f7 | 324 | { |
146a1439 MH |
325 | if (perf_probe_event_need_dwarf(pev)) { |
326 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
327 | return -ENOSYS; | |
328 | } | |
4b4da7f7 MH |
329 | return 0; |
330 | } | |
331 | ||
146a1439 | 332 | int show_line_range(struct line_range *lr __unused) |
4b4da7f7 | 333 | { |
146a1439 MH |
334 | pr_warning("Debuginfo-analysis is not supported.\n"); |
335 | return -ENOSYS; | |
4b4da7f7 MH |
336 | } |
337 | ||
e0faa8d3 MH |
338 | #endif |
339 | ||
146a1439 | 340 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def MH |
341 | { |
342 | const char *ptr; | |
343 | char *tmp; | |
344 | /* | |
345 | * <Syntax> | |
346 | * SRC:SLN[+NUM|-ELN] | |
347 | * FUNC[:SLN[+NUM|-ELN]] | |
348 | */ | |
349 | ptr = strchr(arg, ':'); | |
350 | if (ptr) { | |
d3b63d7a | 351 | lr->start = (int)strtoul(ptr + 1, &tmp, 0); |
dda4ab34 | 352 | if (*tmp == '+') { |
d3b63d7a | 353 | lr->end = lr->start + (int)strtoul(tmp + 1, &tmp, 0); |
dda4ab34 MH |
354 | lr->end--; /* |
355 | * Adjust the number of lines here. | |
356 | * If the number of lines == 1, the | |
357 | * the end of line should be equal to | |
358 | * the start of line. | |
359 | */ | |
360 | } else if (*tmp == '-') | |
d3b63d7a | 361 | lr->end = (int)strtoul(tmp + 1, &tmp, 0); |
631c9def | 362 | else |
d3b63d7a MH |
363 | lr->end = INT_MAX; |
364 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); | |
365 | if (lr->start > lr->end) { | |
631c9def | 366 | semantic_error("Start line must be smaller" |
146a1439 MH |
367 | " than end line.\n"); |
368 | return -EINVAL; | |
369 | } | |
370 | if (*tmp != '\0') { | |
371 | semantic_error("Tailing with invalid character '%d'.\n", | |
631c9def | 372 | *tmp); |
146a1439 MH |
373 | return -EINVAL; |
374 | } | |
02b95dad | 375 | tmp = strndup(arg, (ptr - arg)); |
d3b63d7a | 376 | } else { |
02b95dad | 377 | tmp = strdup(arg); |
d3b63d7a MH |
378 | lr->end = INT_MAX; |
379 | } | |
02b95dad MH |
380 | |
381 | if (tmp == NULL) | |
382 | return -ENOMEM; | |
631c9def MH |
383 | |
384 | if (strchr(tmp, '.')) | |
385 | lr->file = tmp; | |
386 | else | |
387 | lr->function = tmp; | |
146a1439 MH |
388 | |
389 | return 0; | |
631c9def MH |
390 | } |
391 | ||
b7702a21 MH |
392 | /* Check the name is good for event/group */ |
393 | static bool check_event_name(const char *name) | |
394 | { | |
395 | if (!isalpha(*name) && *name != '_') | |
396 | return false; | |
397 | while (*++name != '\0') { | |
398 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
399 | return false; | |
400 | } | |
401 | return true; | |
402 | } | |
403 | ||
50656eec | 404 | /* Parse probepoint definition. */ |
146a1439 | 405 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 406 | { |
4235b045 | 407 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
408 | char *ptr, *tmp; |
409 | char c, nc = 0; | |
410 | /* | |
411 | * <Syntax> | |
2a9c8c36 MH |
412 | * perf probe [EVENT=]SRC[:LN|;PTN] |
413 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
414 | * |
415 | * TODO:Group name support | |
50656eec MH |
416 | */ |
417 | ||
2a9c8c36 MH |
418 | ptr = strpbrk(arg, ";=@+%"); |
419 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
420 | *ptr = '\0'; |
421 | tmp = ptr + 1; | |
146a1439 MH |
422 | if (strchr(arg, ':')) { |
423 | semantic_error("Group name is not supported yet.\n"); | |
424 | return -ENOTSUP; | |
425 | } | |
426 | if (!check_event_name(arg)) { | |
b7702a21 | 427 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
428 | "follow C symbol-naming rule.\n", arg); |
429 | return -EINVAL; | |
430 | } | |
02b95dad MH |
431 | pev->event = strdup(arg); |
432 | if (pev->event == NULL) | |
433 | return -ENOMEM; | |
4235b045 | 434 | pev->group = NULL; |
af663d75 MH |
435 | arg = tmp; |
436 | } | |
437 | ||
2a9c8c36 | 438 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
439 | if (ptr) { |
440 | nc = *ptr; | |
441 | *ptr++ = '\0'; | |
442 | } | |
443 | ||
02b95dad MH |
444 | tmp = strdup(arg); |
445 | if (tmp == NULL) | |
446 | return -ENOMEM; | |
447 | ||
50656eec | 448 | /* Check arg is function or file and copy it */ |
02b95dad MH |
449 | if (strchr(tmp, '.')) /* File */ |
450 | pp->file = tmp; | |
50656eec | 451 | else /* Function */ |
02b95dad | 452 | pp->function = tmp; |
50656eec MH |
453 | |
454 | /* Parse other options */ | |
455 | while (ptr) { | |
456 | arg = ptr; | |
457 | c = nc; | |
2a9c8c36 | 458 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
459 | pp->lazy_line = strdup(arg); |
460 | if (pp->lazy_line == NULL) | |
461 | return -ENOMEM; | |
2a9c8c36 MH |
462 | break; |
463 | } | |
464 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
465 | if (ptr) { |
466 | nc = *ptr; | |
467 | *ptr++ = '\0'; | |
468 | } | |
469 | switch (c) { | |
470 | case ':': /* Line number */ | |
471 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 472 | if (*tmp != '\0') { |
2a9c8c36 | 473 | semantic_error("There is non-digit char" |
146a1439 MH |
474 | " in line number.\n"); |
475 | return -EINVAL; | |
476 | } | |
50656eec MH |
477 | break; |
478 | case '+': /* Byte offset from a symbol */ | |
479 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 480 | if (*tmp != '\0') { |
2a9c8c36 | 481 | semantic_error("There is non-digit character" |
146a1439 MH |
482 | " in offset.\n"); |
483 | return -EINVAL; | |
484 | } | |
50656eec MH |
485 | break; |
486 | case '@': /* File name */ | |
146a1439 MH |
487 | if (pp->file) { |
488 | semantic_error("SRC@SRC is not allowed.\n"); | |
489 | return -EINVAL; | |
490 | } | |
02b95dad MH |
491 | pp->file = strdup(arg); |
492 | if (pp->file == NULL) | |
493 | return -ENOMEM; | |
50656eec MH |
494 | break; |
495 | case '%': /* Probe places */ | |
496 | if (strcmp(arg, "return") == 0) { | |
497 | pp->retprobe = 1; | |
146a1439 MH |
498 | } else { /* Others not supported yet */ |
499 | semantic_error("%%%s is not supported.\n", arg); | |
500 | return -ENOTSUP; | |
501 | } | |
50656eec | 502 | break; |
146a1439 MH |
503 | default: /* Buggy case */ |
504 | pr_err("This program has a bug at %s:%d.\n", | |
505 | __FILE__, __LINE__); | |
506 | return -ENOTSUP; | |
50656eec MH |
507 | break; |
508 | } | |
509 | } | |
510 | ||
511 | /* Exclusion check */ | |
146a1439 | 512 | if (pp->lazy_line && pp->line) { |
2a9c8c36 | 513 | semantic_error("Lazy pattern can't be used with line number."); |
146a1439 MH |
514 | return -EINVAL; |
515 | } | |
2a9c8c36 | 516 | |
146a1439 | 517 | if (pp->lazy_line && pp->offset) { |
2a9c8c36 | 518 | semantic_error("Lazy pattern can't be used with offset."); |
146a1439 MH |
519 | return -EINVAL; |
520 | } | |
2a9c8c36 | 521 | |
146a1439 | 522 | if (pp->line && pp->offset) { |
50656eec | 523 | semantic_error("Offset can't be used with line number."); |
146a1439 MH |
524 | return -EINVAL; |
525 | } | |
50656eec | 526 | |
146a1439 | 527 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 MH |
528 | semantic_error("File always requires line number or " |
529 | "lazy pattern."); | |
146a1439 MH |
530 | return -EINVAL; |
531 | } | |
50656eec | 532 | |
146a1439 | 533 | if (pp->offset && !pp->function) { |
50656eec | 534 | semantic_error("Offset requires an entry function."); |
146a1439 MH |
535 | return -EINVAL; |
536 | } | |
50656eec | 537 | |
146a1439 | 538 | if (pp->retprobe && !pp->function) { |
50656eec | 539 | semantic_error("Return probe requires an entry function."); |
146a1439 MH |
540 | return -EINVAL; |
541 | } | |
50656eec | 542 | |
146a1439 | 543 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 MH |
544 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
545 | "return probe."); | |
146a1439 MH |
546 | return -EINVAL; |
547 | } | |
50656eec | 548 | |
4235b045 | 549 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
550 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
551 | pp->lazy_line); | |
146a1439 | 552 | return 0; |
50656eec MH |
553 | } |
554 | ||
7df2f329 | 555 | /* Parse perf-probe event argument */ |
146a1439 | 556 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 557 | { |
48481938 | 558 | char *tmp; |
7df2f329 MH |
559 | struct perf_probe_arg_field **fieldp; |
560 | ||
561 | pr_debug("parsing arg: %s into ", str); | |
562 | ||
48481938 MH |
563 | tmp = strchr(str, '='); |
564 | if (tmp) { | |
02b95dad MH |
565 | arg->name = strndup(str, tmp - str); |
566 | if (arg->name == NULL) | |
567 | return -ENOMEM; | |
11a1ca35 | 568 | pr_debug("name:%s ", arg->name); |
48481938 MH |
569 | str = tmp + 1; |
570 | } | |
571 | ||
11a1ca35 MH |
572 | tmp = strchr(str, ':'); |
573 | if (tmp) { /* Type setting */ | |
574 | *tmp = '\0'; | |
02b95dad MH |
575 | arg->type = strdup(tmp + 1); |
576 | if (arg->type == NULL) | |
577 | return -ENOMEM; | |
11a1ca35 MH |
578 | pr_debug("type:%s ", arg->type); |
579 | } | |
580 | ||
7df2f329 MH |
581 | tmp = strpbrk(str, "-."); |
582 | if (!is_c_varname(str) || !tmp) { | |
583 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
584 | arg->var = strdup(str); |
585 | if (arg->var == NULL) | |
586 | return -ENOMEM; | |
48481938 | 587 | pr_debug("%s\n", arg->var); |
146a1439 | 588 | return 0; |
7df2f329 MH |
589 | } |
590 | ||
591 | /* Structure fields */ | |
02b95dad MH |
592 | arg->var = strndup(str, tmp - str); |
593 | if (arg->var == NULL) | |
594 | return -ENOMEM; | |
48481938 | 595 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
596 | fieldp = &arg->field; |
597 | ||
598 | do { | |
e334016f MH |
599 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
600 | if (*fieldp == NULL) | |
601 | return -ENOMEM; | |
7df2f329 MH |
602 | if (*tmp == '.') { |
603 | str = tmp + 1; | |
604 | (*fieldp)->ref = false; | |
605 | } else if (tmp[1] == '>') { | |
606 | str = tmp + 2; | |
607 | (*fieldp)->ref = true; | |
146a1439 MH |
608 | } else { |
609 | semantic_error("Argument parse error: %s\n", str); | |
610 | return -EINVAL; | |
611 | } | |
7df2f329 MH |
612 | |
613 | tmp = strpbrk(str, "-."); | |
614 | if (tmp) { | |
02b95dad MH |
615 | (*fieldp)->name = strndup(str, tmp - str); |
616 | if ((*fieldp)->name == NULL) | |
617 | return -ENOMEM; | |
7df2f329 MH |
618 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
619 | fieldp = &(*fieldp)->next; | |
620 | } | |
621 | } while (tmp); | |
02b95dad MH |
622 | (*fieldp)->name = strdup(str); |
623 | if ((*fieldp)->name == NULL) | |
624 | return -ENOMEM; | |
7df2f329 | 625 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b MH |
626 | |
627 | /* If no name is specified, set the last field name */ | |
02b95dad MH |
628 | if (!arg->name) { |
629 | arg->name = strdup((*fieldp)->name); | |
630 | if (arg->name == NULL) | |
631 | return -ENOMEM; | |
632 | } | |
146a1439 | 633 | return 0; |
7df2f329 MH |
634 | } |
635 | ||
4235b045 | 636 | /* Parse perf-probe event command */ |
146a1439 | 637 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 638 | { |
e1c01d61 | 639 | char **argv; |
146a1439 | 640 | int argc, i, ret = 0; |
fac13fd5 | 641 | |
4235b045 | 642 | argv = argv_split(cmd, &argc); |
146a1439 MH |
643 | if (!argv) { |
644 | pr_debug("Failed to split arguments.\n"); | |
645 | return -ENOMEM; | |
646 | } | |
647 | if (argc - 1 > MAX_PROBE_ARGS) { | |
648 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
649 | ret = -ERANGE; | |
650 | goto out; | |
651 | } | |
50656eec | 652 | /* Parse probe point */ |
146a1439 MH |
653 | ret = parse_perf_probe_point(argv[0], pev); |
654 | if (ret < 0) | |
655 | goto out; | |
50656eec | 656 | |
e1c01d61 | 657 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 658 | pev->nargs = argc - 1; |
e334016f MH |
659 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
660 | if (pev->args == NULL) { | |
661 | ret = -ENOMEM; | |
662 | goto out; | |
663 | } | |
146a1439 MH |
664 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
665 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
666 | if (ret >= 0 && | |
667 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 668 | semantic_error("You can't specify local variable for" |
146a1439 MH |
669 | " kretprobe.\n"); |
670 | ret = -EINVAL; | |
671 | } | |
e1c01d61 | 672 | } |
146a1439 | 673 | out: |
e1c01d61 | 674 | argv_free(argv); |
146a1439 MH |
675 | |
676 | return ret; | |
50656eec MH |
677 | } |
678 | ||
4235b045 MH |
679 | /* Return true if this perf_probe_event requires debuginfo */ |
680 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
681 | { | |
682 | int i; | |
683 | ||
684 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
685 | return true; | |
686 | ||
687 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 688 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
689 | return true; |
690 | ||
691 | return false; | |
692 | } | |
693 | ||
4de189fe | 694 | /* Parse kprobe_events event into struct probe_point */ |
146a1439 | 695 | int parse_kprobe_trace_command(const char *cmd, struct kprobe_trace_event *tev) |
4de189fe | 696 | { |
4235b045 | 697 | struct kprobe_trace_point *tp = &tev->point; |
4de189fe MH |
698 | char pr; |
699 | char *p; | |
700 | int ret, i, argc; | |
701 | char **argv; | |
702 | ||
4235b045 MH |
703 | pr_debug("Parsing kprobe_events: %s\n", cmd); |
704 | argv = argv_split(cmd, &argc); | |
146a1439 MH |
705 | if (!argv) { |
706 | pr_debug("Failed to split arguments.\n"); | |
707 | return -ENOMEM; | |
708 | } | |
709 | if (argc < 2) { | |
710 | semantic_error("Too few probe arguments.\n"); | |
711 | ret = -ERANGE; | |
712 | goto out; | |
713 | } | |
4de189fe MH |
714 | |
715 | /* Scan event and group name. */ | |
93aaa45a | 716 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
717 | &pr, (float *)(void *)&tev->group, |
718 | (float *)(void *)&tev->event); | |
146a1439 MH |
719 | if (ret != 3) { |
720 | semantic_error("Failed to parse event name: %s\n", argv[0]); | |
721 | ret = -EINVAL; | |
722 | goto out; | |
723 | } | |
4235b045 | 724 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 725 | |
4235b045 | 726 | tp->retprobe = (pr == 'r'); |
4de189fe MH |
727 | |
728 | /* Scan function name and offset */ | |
4235b045 MH |
729 | ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol, |
730 | &tp->offset); | |
4de189fe | 731 | if (ret == 1) |
4235b045 | 732 | tp->offset = 0; |
4de189fe | 733 | |
4235b045 | 734 | tev->nargs = argc - 2; |
e334016f MH |
735 | tev->args = zalloc(sizeof(struct kprobe_trace_arg) * tev->nargs); |
736 | if (tev->args == NULL) { | |
737 | ret = -ENOMEM; | |
738 | goto out; | |
739 | } | |
4235b045 | 740 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
741 | p = strchr(argv[i + 2], '='); |
742 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
743 | *p++ = '\0'; |
744 | else | |
745 | p = argv[i + 2]; | |
02b95dad | 746 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 747 | /* TODO: parse regs and offset */ |
02b95dad MH |
748 | tev->args[i].value = strdup(p); |
749 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
750 | ret = -ENOMEM; | |
751 | goto out; | |
752 | } | |
4de189fe | 753 | } |
146a1439 MH |
754 | ret = 0; |
755 | out: | |
4de189fe | 756 | argv_free(argv); |
146a1439 | 757 | return ret; |
4de189fe MH |
758 | } |
759 | ||
7df2f329 MH |
760 | /* Compose only probe arg */ |
761 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
762 | { | |
763 | struct perf_probe_arg_field *field = pa->field; | |
764 | int ret; | |
765 | char *tmp = buf; | |
766 | ||
48481938 MH |
767 | if (pa->name && pa->var) |
768 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
769 | else | |
770 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
771 | if (ret <= 0) |
772 | goto error; | |
773 | tmp += ret; | |
774 | len -= ret; | |
775 | ||
776 | while (field) { | |
777 | ret = e_snprintf(tmp, len, "%s%s", field->ref ? "->" : ".", | |
778 | field->name); | |
779 | if (ret <= 0) | |
780 | goto error; | |
781 | tmp += ret; | |
782 | len -= ret; | |
783 | field = field->next; | |
784 | } | |
11a1ca35 MH |
785 | |
786 | if (pa->type) { | |
787 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
788 | if (ret <= 0) | |
789 | goto error; | |
790 | tmp += ret; | |
791 | len -= ret; | |
792 | } | |
793 | ||
7df2f329 MH |
794 | return tmp - buf; |
795 | error: | |
146a1439 MH |
796 | pr_debug("Failed to synthesize perf probe argument: %s", |
797 | strerror(-ret)); | |
798 | return ret; | |
7df2f329 MH |
799 | } |
800 | ||
4235b045 MH |
801 | /* Compose only probe point (not argument) */ |
802 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 803 | { |
fb1587d8 MH |
804 | char *buf, *tmp; |
805 | char offs[32] = "", line[32] = "", file[32] = ""; | |
806 | int ret, len; | |
4de189fe | 807 | |
e334016f MH |
808 | buf = zalloc(MAX_CMDLEN); |
809 | if (buf == NULL) { | |
810 | ret = -ENOMEM; | |
811 | goto error; | |
812 | } | |
4de189fe | 813 | if (pp->offset) { |
fb1587d8 | 814 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
815 | if (ret <= 0) |
816 | goto error; | |
817 | } | |
818 | if (pp->line) { | |
fb1587d8 MH |
819 | ret = e_snprintf(line, 32, ":%d", pp->line); |
820 | if (ret <= 0) | |
821 | goto error; | |
822 | } | |
823 | if (pp->file) { | |
dd259c5d | 824 | len = strlen(pp->file) - 31; |
fb1587d8 MH |
825 | if (len < 0) |
826 | len = 0; | |
827 | tmp = strchr(pp->file + len, '/'); | |
828 | if (!tmp) | |
dd259c5d | 829 | tmp = pp->file + len; |
fb1587d8 | 830 | ret = e_snprintf(file, 32, "@%s", tmp + 1); |
4de189fe MH |
831 | if (ret <= 0) |
832 | goto error; | |
833 | } | |
834 | ||
835 | if (pp->function) | |
fb1587d8 MH |
836 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
837 | offs, pp->retprobe ? "%return" : "", line, | |
838 | file); | |
4de189fe | 839 | else |
fb1587d8 | 840 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
841 | if (ret <= 0) |
842 | goto error; | |
843 | ||
844 | return buf; | |
7ef17aaf | 845 | error: |
146a1439 MH |
846 | pr_debug("Failed to synthesize perf probe point: %s", |
847 | strerror(-ret)); | |
e334016f MH |
848 | if (buf) |
849 | free(buf); | |
146a1439 | 850 | return NULL; |
7ef17aaf MH |
851 | } |
852 | ||
4235b045 MH |
853 | #if 0 |
854 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
855 | { |
856 | char *buf; | |
857 | int i, len, ret; | |
858 | ||
4235b045 MH |
859 | buf = synthesize_perf_probe_point(&pev->point); |
860 | if (!buf) | |
861 | return NULL; | |
4de189fe | 862 | |
4235b045 MH |
863 | len = strlen(buf); |
864 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 865 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
866 | pev->args[i].name); |
867 | if (ret <= 0) { | |
868 | free(buf); | |
869 | return NULL; | |
870 | } | |
4de189fe MH |
871 | len += ret; |
872 | } | |
4de189fe | 873 | |
4235b045 MH |
874 | return buf; |
875 | } | |
876 | #endif | |
877 | ||
878 | static int __synthesize_kprobe_trace_arg_ref(struct kprobe_trace_arg_ref *ref, | |
879 | char **buf, size_t *buflen, | |
880 | int depth) | |
881 | { | |
882 | int ret; | |
883 | if (ref->next) { | |
884 | depth = __synthesize_kprobe_trace_arg_ref(ref->next, buf, | |
885 | buflen, depth + 1); | |
886 | if (depth < 0) | |
887 | goto out; | |
888 | } | |
889 | ||
890 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
891 | if (ret < 0) | |
892 | depth = ret; | |
893 | else { | |
894 | *buf += ret; | |
895 | *buflen -= ret; | |
896 | } | |
897 | out: | |
898 | return depth; | |
4de189fe | 899 | |
4de189fe MH |
900 | } |
901 | ||
4235b045 MH |
902 | static int synthesize_kprobe_trace_arg(struct kprobe_trace_arg *arg, |
903 | char *buf, size_t buflen) | |
50656eec | 904 | { |
4235b045 MH |
905 | int ret, depth = 0; |
906 | char *tmp = buf; | |
907 | ||
908 | /* Argument name or separator */ | |
909 | if (arg->name) | |
910 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
911 | else | |
912 | ret = e_snprintf(buf, buflen, " "); | |
913 | if (ret < 0) | |
914 | return ret; | |
915 | buf += ret; | |
916 | buflen -= ret; | |
917 | ||
918 | /* Dereferencing arguments */ | |
919 | if (arg->ref) { | |
920 | depth = __synthesize_kprobe_trace_arg_ref(arg->ref, &buf, | |
921 | &buflen, 1); | |
922 | if (depth < 0) | |
923 | return depth; | |
924 | } | |
925 | ||
926 | /* Print argument value */ | |
927 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
928 | if (ret < 0) | |
929 | return ret; | |
930 | buf += ret; | |
931 | buflen -= ret; | |
932 | ||
933 | /* Closing */ | |
934 | while (depth--) { | |
935 | ret = e_snprintf(buf, buflen, ")"); | |
936 | if (ret < 0) | |
937 | return ret; | |
938 | buf += ret; | |
939 | buflen -= ret; | |
940 | } | |
4984912e MH |
941 | /* Print argument type */ |
942 | if (arg->type) { | |
943 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
944 | if (ret <= 0) | |
945 | return ret; | |
946 | buf += ret; | |
947 | } | |
4235b045 MH |
948 | |
949 | return buf - tmp; | |
950 | } | |
951 | ||
952 | char *synthesize_kprobe_trace_command(struct kprobe_trace_event *tev) | |
953 | { | |
954 | struct kprobe_trace_point *tp = &tev->point; | |
50656eec MH |
955 | char *buf; |
956 | int i, len, ret; | |
957 | ||
e334016f MH |
958 | buf = zalloc(MAX_CMDLEN); |
959 | if (buf == NULL) | |
960 | return NULL; | |
961 | ||
4235b045 MH |
962 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu", |
963 | tp->retprobe ? 'r' : 'p', | |
964 | tev->group, tev->event, | |
965 | tp->symbol, tp->offset); | |
966 | if (len <= 0) | |
50656eec | 967 | goto error; |
50656eec | 968 | |
4235b045 MH |
969 | for (i = 0; i < tev->nargs; i++) { |
970 | ret = synthesize_kprobe_trace_arg(&tev->args[i], buf + len, | |
971 | MAX_CMDLEN - len); | |
4de189fe | 972 | if (ret <= 0) |
50656eec MH |
973 | goto error; |
974 | len += ret; | |
975 | } | |
50656eec | 976 | |
4235b045 | 977 | return buf; |
50656eec | 978 | error: |
4235b045 MH |
979 | free(buf); |
980 | return NULL; | |
981 | } | |
50656eec | 982 | |
146a1439 MH |
983 | int convert_to_perf_probe_event(struct kprobe_trace_event *tev, |
984 | struct perf_probe_event *pev) | |
4235b045 | 985 | { |
02b95dad | 986 | char buf[64] = ""; |
146a1439 | 987 | int i, ret; |
4235b045 | 988 | |
4b4da7f7 | 989 | /* Convert event/group name */ |
02b95dad MH |
990 | pev->event = strdup(tev->event); |
991 | pev->group = strdup(tev->group); | |
992 | if (pev->event == NULL || pev->group == NULL) | |
993 | return -ENOMEM; | |
fb1587d8 | 994 | |
4b4da7f7 | 995 | /* Convert trace_point to probe_point */ |
146a1439 MH |
996 | ret = convert_to_perf_probe_point(&tev->point, &pev->point); |
997 | if (ret < 0) | |
998 | return ret; | |
4b4da7f7 | 999 | |
4235b045 MH |
1000 | /* Convert trace_arg to probe_arg */ |
1001 | pev->nargs = tev->nargs; | |
e334016f MH |
1002 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1003 | if (pev->args == NULL) | |
1004 | return -ENOMEM; | |
02b95dad | 1005 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1006 | if (tev->args[i].name) |
02b95dad | 1007 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1008 | else { |
146a1439 MH |
1009 | ret = synthesize_kprobe_trace_arg(&tev->args[i], |
1010 | buf, 64); | |
02b95dad | 1011 | pev->args[i].name = strdup(buf); |
4235b045 | 1012 | } |
02b95dad MH |
1013 | if (pev->args[i].name == NULL && ret >= 0) |
1014 | ret = -ENOMEM; | |
1015 | } | |
146a1439 MH |
1016 | |
1017 | if (ret < 0) | |
1018 | clear_perf_probe_event(pev); | |
1019 | ||
1020 | return ret; | |
4235b045 MH |
1021 | } |
1022 | ||
1023 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1024 | { | |
1025 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1026 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1027 | int i; |
1028 | ||
1029 | if (pev->event) | |
1030 | free(pev->event); | |
1031 | if (pev->group) | |
1032 | free(pev->group); | |
1033 | if (pp->file) | |
1034 | free(pp->file); | |
1035 | if (pp->function) | |
1036 | free(pp->function); | |
1037 | if (pp->lazy_line) | |
1038 | free(pp->lazy_line); | |
7df2f329 | 1039 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1040 | if (pev->args[i].name) |
1041 | free(pev->args[i].name); | |
48481938 MH |
1042 | if (pev->args[i].var) |
1043 | free(pev->args[i].var); | |
11a1ca35 MH |
1044 | if (pev->args[i].type) |
1045 | free(pev->args[i].type); | |
7df2f329 MH |
1046 | field = pev->args[i].field; |
1047 | while (field) { | |
1048 | next = field->next; | |
1049 | if (field->name) | |
1050 | free(field->name); | |
1051 | free(field); | |
1052 | field = next; | |
1053 | } | |
1054 | } | |
4235b045 MH |
1055 | if (pev->args) |
1056 | free(pev->args); | |
1057 | memset(pev, 0, sizeof(*pev)); | |
1058 | } | |
1059 | ||
1060 | void clear_kprobe_trace_event(struct kprobe_trace_event *tev) | |
1061 | { | |
1062 | struct kprobe_trace_arg_ref *ref, *next; | |
1063 | int i; | |
1064 | ||
1065 | if (tev->event) | |
1066 | free(tev->event); | |
1067 | if (tev->group) | |
1068 | free(tev->group); | |
1069 | if (tev->point.symbol) | |
1070 | free(tev->point.symbol); | |
1071 | for (i = 0; i < tev->nargs; i++) { | |
1072 | if (tev->args[i].name) | |
1073 | free(tev->args[i].name); | |
1074 | if (tev->args[i].value) | |
1075 | free(tev->args[i].value); | |
4984912e MH |
1076 | if (tev->args[i].type) |
1077 | free(tev->args[i].type); | |
4235b045 MH |
1078 | ref = tev->args[i].ref; |
1079 | while (ref) { | |
1080 | next = ref->next; | |
1081 | free(ref); | |
1082 | ref = next; | |
1083 | } | |
1084 | } | |
1085 | if (tev->args) | |
1086 | free(tev->args); | |
1087 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1088 | } |
1089 | ||
f4d7da49 | 1090 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
1091 | { |
1092 | char buf[PATH_MAX]; | |
7ca5989d | 1093 | const char *__debugfs; |
4de189fe MH |
1094 | int ret; |
1095 | ||
7ca5989d MH |
1096 | __debugfs = debugfs_find_mountpoint(); |
1097 | if (__debugfs == NULL) { | |
1098 | pr_warning("Debugfs is not mounted.\n"); | |
1099 | return -ENOENT; | |
1100 | } | |
1101 | ||
1102 | ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); | |
146a1439 | 1103 | if (ret >= 0) { |
7ca5989d | 1104 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1105 | if (readwrite && !probe_event_dry_run) |
1106 | ret = open(buf, O_RDWR, O_APPEND); | |
1107 | else | |
1108 | ret = open(buf, O_RDONLY, 0); | |
1109 | } | |
f4d7da49 | 1110 | |
4de189fe MH |
1111 | if (ret < 0) { |
1112 | if (errno == ENOENT) | |
146a1439 MH |
1113 | pr_warning("kprobe_events file does not exist - please" |
1114 | " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); | |
4de189fe | 1115 | else |
146a1439 MH |
1116 | pr_warning("Failed to open kprobe_events file: %s\n", |
1117 | strerror(errno)); | |
4de189fe MH |
1118 | } |
1119 | return ret; | |
1120 | } | |
1121 | ||
1122 | /* Get raw string list of current kprobe_events */ | |
4235b045 | 1123 | static struct strlist *get_kprobe_trace_command_rawlist(int fd) |
4de189fe MH |
1124 | { |
1125 | int ret, idx; | |
1126 | FILE *fp; | |
1127 | char buf[MAX_CMDLEN]; | |
1128 | char *p; | |
1129 | struct strlist *sl; | |
1130 | ||
1131 | sl = strlist__new(true, NULL); | |
1132 | ||
1133 | fp = fdopen(dup(fd), "r"); | |
1134 | while (!feof(fp)) { | |
1135 | p = fgets(buf, MAX_CMDLEN, fp); | |
1136 | if (!p) | |
1137 | break; | |
1138 | ||
1139 | idx = strlen(p) - 1; | |
1140 | if (p[idx] == '\n') | |
1141 | p[idx] = '\0'; | |
1142 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1143 | if (ret < 0) { |
1144 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1145 | strlist__delete(sl); | |
1146 | return NULL; | |
1147 | } | |
4de189fe MH |
1148 | } |
1149 | fclose(fp); | |
1150 | ||
1151 | return sl; | |
1152 | } | |
1153 | ||
278498d4 | 1154 | /* Show an event */ |
146a1439 | 1155 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1156 | { |
7e990a51 | 1157 | int i, ret; |
278498d4 | 1158 | char buf[128]; |
4235b045 | 1159 | char *place; |
278498d4 | 1160 | |
4235b045 MH |
1161 | /* Synthesize only event probe point */ |
1162 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1163 | if (!place) |
1164 | return -EINVAL; | |
4235b045 MH |
1165 | |
1166 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1167 | if (ret < 0) |
146a1439 MH |
1168 | return ret; |
1169 | ||
fb1587d8 | 1170 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1171 | |
4235b045 | 1172 | if (pev->nargs > 0) { |
278498d4 | 1173 | printf(" with"); |
7df2f329 | 1174 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1175 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1176 | buf, 128); | |
1177 | if (ret < 0) | |
1178 | break; | |
7df2f329 MH |
1179 | printf(" %s", buf); |
1180 | } | |
278498d4 MH |
1181 | } |
1182 | printf(")\n"); | |
4235b045 | 1183 | free(place); |
146a1439 | 1184 | return ret; |
278498d4 MH |
1185 | } |
1186 | ||
4de189fe | 1187 | /* List up current perf-probe events */ |
146a1439 | 1188 | int show_perf_probe_events(void) |
4de189fe | 1189 | { |
146a1439 | 1190 | int fd, ret; |
4235b045 MH |
1191 | struct kprobe_trace_event tev; |
1192 | struct perf_probe_event pev; | |
4de189fe MH |
1193 | struct strlist *rawlist; |
1194 | struct str_node *ent; | |
1195 | ||
72041334 | 1196 | setup_pager(); |
146a1439 MH |
1197 | ret = init_vmlinux(); |
1198 | if (ret < 0) | |
1199 | return ret; | |
4235b045 MH |
1200 | |
1201 | memset(&tev, 0, sizeof(tev)); | |
1202 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1203 | |
f4d7da49 | 1204 | fd = open_kprobe_events(false); |
146a1439 MH |
1205 | if (fd < 0) |
1206 | return fd; | |
1207 | ||
4235b045 | 1208 | rawlist = get_kprobe_trace_command_rawlist(fd); |
4de189fe | 1209 | close(fd); |
146a1439 MH |
1210 | if (!rawlist) |
1211 | return -ENOENT; | |
4de189fe | 1212 | |
adf365f4 | 1213 | strlist__for_each(ent, rawlist) { |
146a1439 MH |
1214 | ret = parse_kprobe_trace_command(ent->s, &tev); |
1215 | if (ret >= 0) { | |
1216 | ret = convert_to_perf_probe_event(&tev, &pev); | |
1217 | if (ret >= 0) | |
1218 | ret = show_perf_probe_event(&pev); | |
1219 | } | |
4235b045 MH |
1220 | clear_perf_probe_event(&pev); |
1221 | clear_kprobe_trace_event(&tev); | |
146a1439 MH |
1222 | if (ret < 0) |
1223 | break; | |
4de189fe | 1224 | } |
4de189fe | 1225 | strlist__delete(rawlist); |
146a1439 MH |
1226 | |
1227 | return ret; | |
4de189fe MH |
1228 | } |
1229 | ||
b498ce1f | 1230 | /* Get current perf-probe event names */ |
4235b045 | 1231 | static struct strlist *get_kprobe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1232 | { |
fa28244d | 1233 | char buf[128]; |
b498ce1f MH |
1234 | struct strlist *sl, *rawlist; |
1235 | struct str_node *ent; | |
4235b045 | 1236 | struct kprobe_trace_event tev; |
146a1439 | 1237 | int ret = 0; |
b498ce1f | 1238 | |
4235b045 | 1239 | memset(&tev, 0, sizeof(tev)); |
b498ce1f | 1240 | |
4235b045 | 1241 | rawlist = get_kprobe_trace_command_rawlist(fd); |
e1d2017b | 1242 | sl = strlist__new(true, NULL); |
adf365f4 | 1243 | strlist__for_each(ent, rawlist) { |
146a1439 MH |
1244 | ret = parse_kprobe_trace_command(ent->s, &tev); |
1245 | if (ret < 0) | |
1246 | break; | |
fa28244d | 1247 | if (include_group) { |
146a1439 MH |
1248 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1249 | tev.event); | |
1250 | if (ret >= 0) | |
1251 | ret = strlist__add(sl, buf); | |
fa28244d | 1252 | } else |
146a1439 | 1253 | ret = strlist__add(sl, tev.event); |
4235b045 | 1254 | clear_kprobe_trace_event(&tev); |
146a1439 MH |
1255 | if (ret < 0) |
1256 | break; | |
b498ce1f | 1257 | } |
b498ce1f MH |
1258 | strlist__delete(rawlist); |
1259 | ||
146a1439 MH |
1260 | if (ret < 0) { |
1261 | strlist__delete(sl); | |
1262 | return NULL; | |
1263 | } | |
b498ce1f MH |
1264 | return sl; |
1265 | } | |
1266 | ||
146a1439 | 1267 | static int write_kprobe_trace_event(int fd, struct kprobe_trace_event *tev) |
50656eec | 1268 | { |
6eca8cc3 | 1269 | int ret = 0; |
4235b045 | 1270 | char *buf = synthesize_kprobe_trace_command(tev); |
50656eec | 1271 | |
146a1439 MH |
1272 | if (!buf) { |
1273 | pr_debug("Failed to synthesize kprobe trace event.\n"); | |
1274 | return -EINVAL; | |
1275 | } | |
1276 | ||
fa28244d | 1277 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1278 | if (!probe_event_dry_run) { |
1279 | ret = write(fd, buf, strlen(buf)); | |
1280 | if (ret <= 0) | |
146a1439 MH |
1281 | pr_warning("Failed to write event: %s\n", |
1282 | strerror(errno)); | |
f4d7da49 | 1283 | } |
4235b045 | 1284 | free(buf); |
146a1439 | 1285 | return ret; |
50656eec MH |
1286 | } |
1287 | ||
146a1439 MH |
1288 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1289 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1290 | { |
1291 | int i, ret; | |
17f88fcd MH |
1292 | |
1293 | /* Try no suffix */ | |
1294 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1295 | if (ret < 0) { |
1296 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1297 | return ret; | |
1298 | } | |
17f88fcd | 1299 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1300 | return 0; |
17f88fcd | 1301 | |
d761b08b MH |
1302 | if (!allow_suffix) { |
1303 | pr_warning("Error: event \"%s\" already exists. " | |
1304 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1305 | return -EEXIST; |
d761b08b MH |
1306 | } |
1307 | ||
17f88fcd MH |
1308 | /* Try to add suffix */ |
1309 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1310 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1311 | if (ret < 0) { |
1312 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1313 | return ret; | |
1314 | } | |
b498ce1f MH |
1315 | if (!strlist__has_entry(namelist, buf)) |
1316 | break; | |
1317 | } | |
146a1439 MH |
1318 | if (i == MAX_EVENT_INDEX) { |
1319 | pr_warning("Too many events are on the same function.\n"); | |
1320 | ret = -ERANGE; | |
1321 | } | |
1322 | ||
1323 | return ret; | |
b498ce1f MH |
1324 | } |
1325 | ||
146a1439 MH |
1326 | static int __add_kprobe_trace_events(struct perf_probe_event *pev, |
1327 | struct kprobe_trace_event *tevs, | |
1328 | int ntevs, bool allow_suffix) | |
50656eec | 1329 | { |
146a1439 | 1330 | int i, fd, ret; |
55632770 | 1331 | struct kprobe_trace_event *tev = NULL; |
4235b045 MH |
1332 | char buf[64]; |
1333 | const char *event, *group; | |
b498ce1f | 1334 | struct strlist *namelist; |
50656eec | 1335 | |
f4d7da49 | 1336 | fd = open_kprobe_events(true); |
146a1439 MH |
1337 | if (fd < 0) |
1338 | return fd; | |
b498ce1f | 1339 | /* Get current event names */ |
4235b045 | 1340 | namelist = get_kprobe_trace_event_names(fd, false); |
146a1439 MH |
1341 | if (!namelist) { |
1342 | pr_debug("Failed to get current event list.\n"); | |
1343 | return -EIO; | |
1344 | } | |
4235b045 | 1345 | |
146a1439 | 1346 | ret = 0; |
4235b045 | 1347 | printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1348 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1349 | tev = &tevs[i]; |
1350 | if (pev->event) | |
1351 | event = pev->event; | |
1352 | else | |
1353 | if (pev->point.function) | |
1354 | event = pev->point.function; | |
1355 | else | |
1356 | event = tev->point.symbol; | |
1357 | if (pev->group) | |
1358 | group = pev->group; | |
1359 | else | |
1360 | group = PERFPROBE_GROUP; | |
1361 | ||
1362 | /* Get an unused new event name */ | |
146a1439 MH |
1363 | ret = get_new_event_name(buf, 64, event, |
1364 | namelist, allow_suffix); | |
1365 | if (ret < 0) | |
1366 | break; | |
4235b045 MH |
1367 | event = buf; |
1368 | ||
02b95dad MH |
1369 | tev->event = strdup(event); |
1370 | tev->group = strdup(group); | |
1371 | if (tev->event == NULL || tev->group == NULL) { | |
1372 | ret = -ENOMEM; | |
1373 | break; | |
1374 | } | |
146a1439 MH |
1375 | ret = write_kprobe_trace_event(fd, tev); |
1376 | if (ret < 0) | |
1377 | break; | |
4235b045 MH |
1378 | /* Add added event name to namelist */ |
1379 | strlist__add(namelist, event); | |
1380 | ||
1381 | /* Trick here - save current event/group */ | |
1382 | event = pev->event; | |
1383 | group = pev->group; | |
1384 | pev->event = tev->event; | |
1385 | pev->group = tev->group; | |
1386 | show_perf_probe_event(pev); | |
1387 | /* Trick here - restore current event/group */ | |
1388 | pev->event = (char *)event; | |
1389 | pev->group = (char *)group; | |
1390 | ||
1391 | /* | |
1392 | * Probes after the first probe which comes from same | |
1393 | * user input are always allowed to add suffix, because | |
1394 | * there might be several addresses corresponding to | |
1395 | * one code line. | |
1396 | */ | |
1397 | allow_suffix = true; | |
50656eec | 1398 | } |
146a1439 MH |
1399 | |
1400 | if (ret >= 0) { | |
1401 | /* Show how to use the event. */ | |
1402 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
1403 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
1404 | tev->event); | |
1405 | } | |
a9b495b0 | 1406 | |
e1d2017b | 1407 | strlist__delete(namelist); |
50656eec | 1408 | close(fd); |
146a1439 | 1409 | return ret; |
50656eec | 1410 | } |
fa28244d | 1411 | |
4235b045 | 1412 | static int convert_to_kprobe_trace_events(struct perf_probe_event *pev, |
ef4a3565 MH |
1413 | struct kprobe_trace_event **tevs, |
1414 | int max_tevs) | |
e0faa8d3 MH |
1415 | { |
1416 | struct symbol *sym; | |
e334016f | 1417 | int ret = 0, i; |
4235b045 MH |
1418 | struct kprobe_trace_event *tev; |
1419 | ||
4b4da7f7 | 1420 | /* Convert perf_probe_event with debuginfo */ |
ef4a3565 | 1421 | ret = try_to_find_kprobe_trace_events(pev, tevs, max_tevs); |
e334016f MH |
1422 | if (ret != 0) |
1423 | return ret; | |
e0faa8d3 | 1424 | |
4235b045 | 1425 | /* Allocate trace event buffer */ |
e334016f MH |
1426 | tev = *tevs = zalloc(sizeof(struct kprobe_trace_event)); |
1427 | if (tev == NULL) | |
1428 | return -ENOMEM; | |
4235b045 MH |
1429 | |
1430 | /* Copy parameters */ | |
02b95dad MH |
1431 | tev->point.symbol = strdup(pev->point.function); |
1432 | if (tev->point.symbol == NULL) { | |
1433 | ret = -ENOMEM; | |
1434 | goto error; | |
1435 | } | |
4235b045 MH |
1436 | tev->point.offset = pev->point.offset; |
1437 | tev->nargs = pev->nargs; | |
1438 | if (tev->nargs) { | |
e334016f MH |
1439 | tev->args = zalloc(sizeof(struct kprobe_trace_arg) |
1440 | * tev->nargs); | |
1441 | if (tev->args == NULL) { | |
02b95dad MH |
1442 | ret = -ENOMEM; |
1443 | goto error; | |
e334016f | 1444 | } |
48481938 | 1445 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1446 | if (pev->args[i].name) { |
1447 | tev->args[i].name = strdup(pev->args[i].name); | |
1448 | if (tev->args[i].name == NULL) { | |
1449 | ret = -ENOMEM; | |
1450 | goto error; | |
1451 | } | |
1452 | } | |
1453 | tev->args[i].value = strdup(pev->args[i].var); | |
1454 | if (tev->args[i].value == NULL) { | |
1455 | ret = -ENOMEM; | |
1456 | goto error; | |
1457 | } | |
1458 | if (pev->args[i].type) { | |
1459 | tev->args[i].type = strdup(pev->args[i].type); | |
1460 | if (tev->args[i].type == NULL) { | |
1461 | ret = -ENOMEM; | |
1462 | goto error; | |
1463 | } | |
1464 | } | |
48481938 | 1465 | } |
4235b045 MH |
1466 | } |
1467 | ||
1468 | /* Currently just checking function name from symbol map */ | |
1469 | sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION], | |
1470 | tev->point.symbol, NULL); | |
146a1439 MH |
1471 | if (!sym) { |
1472 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1473 | tev->point.symbol); | |
02b95dad MH |
1474 | ret = -ENOENT; |
1475 | goto error; | |
1476 | } | |
e334016f | 1477 | |
02b95dad MH |
1478 | return 1; |
1479 | error: | |
1480 | clear_kprobe_trace_event(tev); | |
1481 | free(tev); | |
1482 | *tevs = NULL; | |
e334016f | 1483 | return ret; |
4235b045 MH |
1484 | } |
1485 | ||
1486 | struct __event_package { | |
1487 | struct perf_probe_event *pev; | |
1488 | struct kprobe_trace_event *tevs; | |
1489 | int ntevs; | |
1490 | }; | |
1491 | ||
146a1439 | 1492 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
ef4a3565 | 1493 | bool force_add, int max_tevs) |
4235b045 | 1494 | { |
146a1439 | 1495 | int i, j, ret; |
4235b045 MH |
1496 | struct __event_package *pkgs; |
1497 | ||
e334016f MH |
1498 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
1499 | if (pkgs == NULL) | |
1500 | return -ENOMEM; | |
4235b045 MH |
1501 | |
1502 | /* Init vmlinux path */ | |
146a1439 MH |
1503 | ret = init_vmlinux(); |
1504 | if (ret < 0) | |
1505 | return ret; | |
4235b045 MH |
1506 | |
1507 | /* Loop 1: convert all events */ | |
1508 | for (i = 0; i < npevs; i++) { | |
1509 | pkgs[i].pev = &pevs[i]; | |
1510 | /* Convert with or without debuginfo */ | |
146a1439 | 1511 | ret = convert_to_kprobe_trace_events(pkgs[i].pev, |
ef4a3565 | 1512 | &pkgs[i].tevs, max_tevs); |
146a1439 MH |
1513 | if (ret < 0) |
1514 | goto end; | |
1515 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
1516 | } |
1517 | ||
4235b045 | 1518 | /* Loop 2: add all events */ |
146a1439 MH |
1519 | for (i = 0; i < npevs && ret >= 0; i++) |
1520 | ret = __add_kprobe_trace_events(pkgs[i].pev, pkgs[i].tevs, | |
1521 | pkgs[i].ntevs, force_add); | |
1522 | end: | |
1523 | /* Loop 3: cleanup trace events */ | |
4235b045 | 1524 | for (i = 0; i < npevs; i++) |
146a1439 MH |
1525 | for (j = 0; j < pkgs[i].ntevs; j++) |
1526 | clear_kprobe_trace_event(&pkgs[i].tevs[j]); | |
1527 | ||
1528 | return ret; | |
e0faa8d3 MH |
1529 | } |
1530 | ||
146a1439 | 1531 | static int __del_trace_kprobe_event(int fd, struct str_node *ent) |
bbbb521b MH |
1532 | { |
1533 | char *p; | |
1534 | char buf[128]; | |
4235b045 | 1535 | int ret; |
bbbb521b MH |
1536 | |
1537 | /* Convert from perf-probe event to trace-kprobe event */ | |
146a1439 MH |
1538 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
1539 | if (ret < 0) | |
1540 | goto error; | |
1541 | ||
bbbb521b | 1542 | p = strchr(buf + 2, ':'); |
146a1439 MH |
1543 | if (!p) { |
1544 | pr_debug("Internal error: %s should have ':' but not.\n", | |
1545 | ent->s); | |
1546 | ret = -ENOTSUP; | |
1547 | goto error; | |
1548 | } | |
bbbb521b MH |
1549 | *p = '/'; |
1550 | ||
4235b045 MH |
1551 | pr_debug("Writing event: %s\n", buf); |
1552 | ret = write(fd, buf, strlen(buf)); | |
146a1439 MH |
1553 | if (ret < 0) |
1554 | goto error; | |
1555 | ||
bbbb521b | 1556 | printf("Remove event: %s\n", ent->s); |
146a1439 MH |
1557 | return 0; |
1558 | error: | |
1559 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
1560 | return ret; | |
bbbb521b MH |
1561 | } |
1562 | ||
146a1439 MH |
1563 | static int del_trace_kprobe_event(int fd, const char *group, |
1564 | const char *event, struct strlist *namelist) | |
fa28244d MH |
1565 | { |
1566 | char buf[128]; | |
bbbb521b | 1567 | struct str_node *ent, *n; |
146a1439 | 1568 | int found = 0, ret = 0; |
fa28244d | 1569 | |
146a1439 MH |
1570 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
1571 | if (ret < 0) { | |
1572 | pr_err("Failed to copy event."); | |
1573 | return ret; | |
1574 | } | |
fa28244d | 1575 | |
bbbb521b MH |
1576 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
1577 | strlist__for_each_safe(ent, n, namelist) | |
1578 | if (strglobmatch(ent->s, buf)) { | |
1579 | found++; | |
146a1439 MH |
1580 | ret = __del_trace_kprobe_event(fd, ent); |
1581 | if (ret < 0) | |
1582 | break; | |
bbbb521b MH |
1583 | strlist__remove(namelist, ent); |
1584 | } | |
1585 | } else { | |
1586 | ent = strlist__find(namelist, buf); | |
1587 | if (ent) { | |
1588 | found++; | |
146a1439 MH |
1589 | ret = __del_trace_kprobe_event(fd, ent); |
1590 | if (ret >= 0) | |
1591 | strlist__remove(namelist, ent); | |
bbbb521b MH |
1592 | } |
1593 | } | |
146a1439 MH |
1594 | if (found == 0 && ret >= 0) |
1595 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
1596 | ||
1597 | return ret; | |
fa28244d MH |
1598 | } |
1599 | ||
146a1439 | 1600 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 1601 | { |
146a1439 | 1602 | int fd, ret = 0; |
fa28244d MH |
1603 | const char *group, *event; |
1604 | char *p, *str; | |
1605 | struct str_node *ent; | |
1606 | struct strlist *namelist; | |
1607 | ||
f4d7da49 | 1608 | fd = open_kprobe_events(true); |
146a1439 MH |
1609 | if (fd < 0) |
1610 | return fd; | |
1611 | ||
fa28244d | 1612 | /* Get current event names */ |
4235b045 | 1613 | namelist = get_kprobe_trace_event_names(fd, true); |
146a1439 MH |
1614 | if (namelist == NULL) |
1615 | return -EINVAL; | |
fa28244d | 1616 | |
adf365f4 | 1617 | strlist__for_each(ent, dellist) { |
02b95dad MH |
1618 | str = strdup(ent->s); |
1619 | if (str == NULL) { | |
1620 | ret = -ENOMEM; | |
1621 | break; | |
1622 | } | |
bbbb521b | 1623 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
1624 | p = strchr(str, ':'); |
1625 | if (p) { | |
1626 | group = str; | |
1627 | *p = '\0'; | |
1628 | event = p + 1; | |
1629 | } else { | |
bbbb521b | 1630 | group = "*"; |
fa28244d MH |
1631 | event = str; |
1632 | } | |
bbbb521b | 1633 | pr_debug("Group: %s, Event: %s\n", group, event); |
146a1439 | 1634 | ret = del_trace_kprobe_event(fd, group, event, namelist); |
fa28244d | 1635 | free(str); |
146a1439 MH |
1636 | if (ret < 0) |
1637 | break; | |
fa28244d MH |
1638 | } |
1639 | strlist__delete(namelist); | |
1640 | close(fd); | |
146a1439 MH |
1641 | |
1642 | return ret; | |
fa28244d MH |
1643 | } |
1644 |