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); |
d28c6223 | 75 | static struct machine machine; |
e0faa8d3 | 76 | |
4b4da7f7 | 77 | /* Initialize symbol maps and path of vmlinux */ |
146a1439 | 78 | static int init_vmlinux(void) |
e0faa8d3 | 79 | { |
a1645ce1 | 80 | struct dso *kernel; |
146a1439 MH |
81 | int ret; |
82 | ||
e0faa8d3 MH |
83 | symbol_conf.sort_by_name = true; |
84 | if (symbol_conf.vmlinux_name == NULL) | |
85 | symbol_conf.try_vmlinux_path = true; | |
86 | else | |
87 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
146a1439 MH |
88 | ret = symbol__init(); |
89 | if (ret < 0) { | |
90 | pr_debug("Failed to init symbol map.\n"); | |
91 | goto out; | |
92 | } | |
e0faa8d3 | 93 | |
d28c6223 ACM |
94 | ret = machine__init(&machine, "/", 0); |
95 | if (ret < 0) | |
96 | goto out; | |
97 | ||
a1645ce1 ZY |
98 | kernel = dso__new_kernel(symbol_conf.vmlinux_name); |
99 | if (kernel == NULL) | |
100 | die("Failed to create kernel dso."); | |
101 | ||
d28c6223 | 102 | ret = __machine__create_kernel_maps(&machine, kernel); |
146a1439 MH |
103 | if (ret < 0) |
104 | pr_debug("Failed to create kernel maps.\n"); | |
105 | ||
106 | out: | |
107 | if (ret < 0) | |
108 | pr_warning("Failed to init vmlinux path.\n"); | |
109 | return ret; | |
e0faa8d3 MH |
110 | } |
111 | ||
4b4da7f7 | 112 | #ifdef DWARF_SUPPORT |
e0faa8d3 MH |
113 | static int open_vmlinux(void) |
114 | { | |
d28c6223 | 115 | if (map__load(machine.vmlinux_maps[MAP__FUNCTION], NULL) < 0) { |
e0faa8d3 MH |
116 | pr_debug("Failed to load kernel map.\n"); |
117 | return -EINVAL; | |
118 | } | |
d28c6223 ACM |
119 | pr_debug("Try to open %s\n", machine.vmlinux_maps[MAP__FUNCTION]->dso->long_name); |
120 | return open(machine.vmlinux_maps[MAP__FUNCTION]->dso->long_name, O_RDONLY); | |
e0faa8d3 | 121 | } |
4b4da7f7 | 122 | |
146a1439 MH |
123 | /* Convert trace point to probe point with debuginfo */ |
124 | static int convert_to_perf_probe_point(struct kprobe_trace_point *tp, | |
125 | struct perf_probe_point *pp) | |
4b4da7f7 MH |
126 | { |
127 | struct symbol *sym; | |
146a1439 | 128 | int fd, ret = -ENOENT; |
4b4da7f7 | 129 | |
d28c6223 | 130 | sym = map__find_symbol_by_name(machine.vmlinux_maps[MAP__FUNCTION], |
4b4da7f7 MH |
131 | tp->symbol, NULL); |
132 | if (sym) { | |
133 | fd = open_vmlinux(); | |
146a1439 MH |
134 | if (fd >= 0) { |
135 | ret = find_perf_probe_point(fd, | |
136 | sym->start + tp->offset, pp); | |
137 | close(fd); | |
138 | } | |
4b4da7f7 MH |
139 | } |
140 | if (ret <= 0) { | |
146a1439 MH |
141 | pr_debug("Failed to find corresponding probes from " |
142 | "debuginfo. Use kprobe event information.\n"); | |
02b95dad MH |
143 | pp->function = strdup(tp->symbol); |
144 | if (pp->function == NULL) | |
145 | return -ENOMEM; | |
4b4da7f7 MH |
146 | pp->offset = tp->offset; |
147 | } | |
148 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
149 | |
150 | return 0; | |
4b4da7f7 MH |
151 | } |
152 | ||
153 | /* Try to find perf_probe_event with debuginfo */ | |
154 | static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, | |
ef4a3565 MH |
155 | struct kprobe_trace_event **tevs, |
156 | int max_tevs) | |
4b4da7f7 MH |
157 | { |
158 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
159 | int fd, ntevs; | |
160 | ||
161 | fd = open_vmlinux(); | |
162 | if (fd < 0) { | |
146a1439 MH |
163 | if (need_dwarf) { |
164 | pr_warning("Failed to open debuginfo file.\n"); | |
165 | return fd; | |
166 | } | |
4b4da7f7 MH |
167 | pr_debug("Could not open vmlinux. Try to use symbols.\n"); |
168 | return 0; | |
169 | } | |
170 | ||
171 | /* Searching trace events corresponding to probe event */ | |
ef4a3565 | 172 | ntevs = find_kprobe_trace_events(fd, pev, tevs, max_tevs); |
4b4da7f7 MH |
173 | close(fd); |
174 | ||
146a1439 MH |
175 | if (ntevs > 0) { /* Succeeded to find trace events */ |
176 | pr_debug("find %d kprobe_trace_events.\n", ntevs); | |
4b4da7f7 | 177 | return ntevs; |
146a1439 | 178 | } |
4b4da7f7 | 179 | |
146a1439 MH |
180 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
181 | pr_warning("Probe point '%s' not found.\n", | |
182 | synthesize_perf_probe_point(&pev->point)); | |
183 | return -ENOENT; | |
184 | } | |
185 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
186 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
187 | if (ntevs == -EBADF) { | |
188 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
189 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
190 | if (!need_dwarf) { | |
191 | pr_debug("Trying to use symbols.\nn"); | |
192 | return 0; | |
193 | } | |
4b4da7f7 | 194 | } |
15eca306 | 195 | return ntevs; |
4b4da7f7 MH |
196 | } |
197 | ||
198 | #define LINEBUF_SIZE 256 | |
199 | #define NR_ADDITIONAL_LINES 2 | |
200 | ||
d3b63d7a | 201 | static int show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
202 | { |
203 | char buf[LINEBUF_SIZE]; | |
204 | const char *color = PERF_COLOR_BLUE; | |
205 | ||
206 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
207 | goto error; | |
208 | if (!skip) { | |
209 | if (show_num) | |
d3b63d7a | 210 | fprintf(stdout, "%7d %s", l, buf); |
4b4da7f7 MH |
211 | else |
212 | color_fprintf(stdout, color, " %s", buf); | |
213 | } | |
214 | ||
215 | while (strlen(buf) == LINEBUF_SIZE - 1 && | |
216 | buf[LINEBUF_SIZE - 2] != '\n') { | |
217 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
218 | goto error; | |
219 | if (!skip) { | |
220 | if (show_num) | |
221 | fprintf(stdout, "%s", buf); | |
222 | else | |
223 | color_fprintf(stdout, color, "%s", buf); | |
224 | } | |
225 | } | |
146a1439 MH |
226 | |
227 | return 0; | |
4b4da7f7 MH |
228 | error: |
229 | if (feof(fp)) | |
146a1439 | 230 | pr_warning("Source file is shorter than expected.\n"); |
4b4da7f7 | 231 | else |
146a1439 MH |
232 | pr_warning("File read error: %s\n", strerror(errno)); |
233 | ||
234 | return -1; | |
4b4da7f7 MH |
235 | } |
236 | ||
237 | /* | |
238 | * Show line-range always requires debuginfo to find source file and | |
239 | * line number. | |
240 | */ | |
146a1439 | 241 | int show_line_range(struct line_range *lr) |
4b4da7f7 | 242 | { |
d3b63d7a | 243 | int l = 1; |
4b4da7f7 MH |
244 | struct line_node *ln; |
245 | FILE *fp; | |
246 | int fd, ret; | |
247 | ||
248 | /* Search a line range */ | |
146a1439 MH |
249 | ret = init_vmlinux(); |
250 | if (ret < 0) | |
251 | return ret; | |
252 | ||
4b4da7f7 | 253 | fd = open_vmlinux(); |
146a1439 MH |
254 | if (fd < 0) { |
255 | pr_warning("Failed to open debuginfo file.\n"); | |
256 | return fd; | |
257 | } | |
258 | ||
4b4da7f7 | 259 | ret = find_line_range(fd, lr); |
4b4da7f7 | 260 | close(fd); |
146a1439 MH |
261 | if (ret == 0) { |
262 | pr_warning("Specified source line is not found.\n"); | |
263 | return -ENOENT; | |
264 | } else if (ret < 0) { | |
265 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
266 | return ret; | |
267 | } | |
4b4da7f7 MH |
268 | |
269 | setup_pager(); | |
270 | ||
271 | if (lr->function) | |
272 | fprintf(stdout, "<%s:%d>\n", lr->function, | |
273 | lr->start - lr->offset); | |
274 | else | |
275 | fprintf(stdout, "<%s:%d>\n", lr->file, lr->start); | |
276 | ||
277 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
278 | if (fp == NULL) { |
279 | pr_warning("Failed to open %s: %s\n", lr->path, | |
280 | strerror(errno)); | |
281 | return -errno; | |
282 | } | |
4b4da7f7 | 283 | /* Skip to starting line number */ |
146a1439 MH |
284 | while (l < lr->start && ret >= 0) |
285 | ret = show_one_line(fp, l++, true, false); | |
286 | if (ret < 0) | |
287 | goto end; | |
4b4da7f7 MH |
288 | |
289 | list_for_each_entry(ln, &lr->line_list, list) { | |
146a1439 MH |
290 | while (ln->line > l && ret >= 0) |
291 | ret = show_one_line(fp, (l++) - lr->offset, | |
292 | false, false); | |
293 | if (ret >= 0) | |
294 | ret = show_one_line(fp, (l++) - lr->offset, | |
295 | false, true); | |
296 | if (ret < 0) | |
297 | goto end; | |
4b4da7f7 MH |
298 | } |
299 | ||
300 | if (lr->end == INT_MAX) | |
301 | lr->end = l + NR_ADDITIONAL_LINES; | |
dda4ab34 | 302 | while (l <= lr->end && !feof(fp) && ret >= 0) |
146a1439 MH |
303 | ret = show_one_line(fp, (l++) - lr->offset, false, false); |
304 | end: | |
4b4da7f7 | 305 | fclose(fp); |
146a1439 | 306 | return ret; |
4b4da7f7 MH |
307 | } |
308 | ||
309 | #else /* !DWARF_SUPPORT */ | |
310 | ||
146a1439 | 311 | static int convert_to_perf_probe_point(struct kprobe_trace_point *tp, |
4b4da7f7 MH |
312 | struct perf_probe_point *pp) |
313 | { | |
02b95dad MH |
314 | pp->function = strdup(tp->symbol); |
315 | if (pp->function == NULL) | |
316 | return -ENOMEM; | |
4b4da7f7 MH |
317 | pp->offset = tp->offset; |
318 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
319 | |
320 | return 0; | |
4b4da7f7 MH |
321 | } |
322 | ||
323 | static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, | |
ef4a3565 MH |
324 | struct kprobe_trace_event **tevs __unused, |
325 | int max_tevs __unused) | |
4b4da7f7 | 326 | { |
146a1439 MH |
327 | if (perf_probe_event_need_dwarf(pev)) { |
328 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
329 | return -ENOSYS; | |
330 | } | |
4b4da7f7 MH |
331 | return 0; |
332 | } | |
333 | ||
146a1439 | 334 | int show_line_range(struct line_range *lr __unused) |
4b4da7f7 | 335 | { |
146a1439 MH |
336 | pr_warning("Debuginfo-analysis is not supported.\n"); |
337 | return -ENOSYS; | |
4b4da7f7 MH |
338 | } |
339 | ||
e0faa8d3 MH |
340 | #endif |
341 | ||
146a1439 | 342 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def MH |
343 | { |
344 | const char *ptr; | |
345 | char *tmp; | |
346 | /* | |
347 | * <Syntax> | |
348 | * SRC:SLN[+NUM|-ELN] | |
349 | * FUNC[:SLN[+NUM|-ELN]] | |
350 | */ | |
351 | ptr = strchr(arg, ':'); | |
352 | if (ptr) { | |
d3b63d7a | 353 | lr->start = (int)strtoul(ptr + 1, &tmp, 0); |
dda4ab34 | 354 | if (*tmp == '+') { |
d3b63d7a | 355 | lr->end = lr->start + (int)strtoul(tmp + 1, &tmp, 0); |
dda4ab34 MH |
356 | lr->end--; /* |
357 | * Adjust the number of lines here. | |
358 | * If the number of lines == 1, the | |
359 | * the end of line should be equal to | |
360 | * the start of line. | |
361 | */ | |
362 | } else if (*tmp == '-') | |
d3b63d7a | 363 | lr->end = (int)strtoul(tmp + 1, &tmp, 0); |
631c9def | 364 | else |
d3b63d7a MH |
365 | lr->end = INT_MAX; |
366 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); | |
367 | if (lr->start > lr->end) { | |
631c9def | 368 | semantic_error("Start line must be smaller" |
146a1439 MH |
369 | " than end line.\n"); |
370 | return -EINVAL; | |
371 | } | |
372 | if (*tmp != '\0') { | |
373 | semantic_error("Tailing with invalid character '%d'.\n", | |
631c9def | 374 | *tmp); |
146a1439 MH |
375 | return -EINVAL; |
376 | } | |
02b95dad | 377 | tmp = strndup(arg, (ptr - arg)); |
d3b63d7a | 378 | } else { |
02b95dad | 379 | tmp = strdup(arg); |
d3b63d7a MH |
380 | lr->end = INT_MAX; |
381 | } | |
02b95dad MH |
382 | |
383 | if (tmp == NULL) | |
384 | return -ENOMEM; | |
631c9def MH |
385 | |
386 | if (strchr(tmp, '.')) | |
387 | lr->file = tmp; | |
388 | else | |
389 | lr->function = tmp; | |
146a1439 MH |
390 | |
391 | return 0; | |
631c9def MH |
392 | } |
393 | ||
b7702a21 MH |
394 | /* Check the name is good for event/group */ |
395 | static bool check_event_name(const char *name) | |
396 | { | |
397 | if (!isalpha(*name) && *name != '_') | |
398 | return false; | |
399 | while (*++name != '\0') { | |
400 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
401 | return false; | |
402 | } | |
403 | return true; | |
404 | } | |
405 | ||
50656eec | 406 | /* Parse probepoint definition. */ |
146a1439 | 407 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 408 | { |
4235b045 | 409 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
410 | char *ptr, *tmp; |
411 | char c, nc = 0; | |
412 | /* | |
413 | * <Syntax> | |
2a9c8c36 MH |
414 | * perf probe [EVENT=]SRC[:LN|;PTN] |
415 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
416 | * |
417 | * TODO:Group name support | |
50656eec MH |
418 | */ |
419 | ||
2a9c8c36 MH |
420 | ptr = strpbrk(arg, ";=@+%"); |
421 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
422 | *ptr = '\0'; |
423 | tmp = ptr + 1; | |
146a1439 MH |
424 | if (strchr(arg, ':')) { |
425 | semantic_error("Group name is not supported yet.\n"); | |
426 | return -ENOTSUP; | |
427 | } | |
428 | if (!check_event_name(arg)) { | |
b7702a21 | 429 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
430 | "follow C symbol-naming rule.\n", arg); |
431 | return -EINVAL; | |
432 | } | |
02b95dad MH |
433 | pev->event = strdup(arg); |
434 | if (pev->event == NULL) | |
435 | return -ENOMEM; | |
4235b045 | 436 | pev->group = NULL; |
af663d75 MH |
437 | arg = tmp; |
438 | } | |
439 | ||
2a9c8c36 | 440 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
441 | if (ptr) { |
442 | nc = *ptr; | |
443 | *ptr++ = '\0'; | |
444 | } | |
445 | ||
02b95dad MH |
446 | tmp = strdup(arg); |
447 | if (tmp == NULL) | |
448 | return -ENOMEM; | |
449 | ||
50656eec | 450 | /* Check arg is function or file and copy it */ |
02b95dad MH |
451 | if (strchr(tmp, '.')) /* File */ |
452 | pp->file = tmp; | |
50656eec | 453 | else /* Function */ |
02b95dad | 454 | pp->function = tmp; |
50656eec MH |
455 | |
456 | /* Parse other options */ | |
457 | while (ptr) { | |
458 | arg = ptr; | |
459 | c = nc; | |
2a9c8c36 | 460 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
461 | pp->lazy_line = strdup(arg); |
462 | if (pp->lazy_line == NULL) | |
463 | return -ENOMEM; | |
2a9c8c36 MH |
464 | break; |
465 | } | |
466 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
467 | if (ptr) { |
468 | nc = *ptr; | |
469 | *ptr++ = '\0'; | |
470 | } | |
471 | switch (c) { | |
472 | case ':': /* Line number */ | |
473 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 474 | if (*tmp != '\0') { |
2a9c8c36 | 475 | semantic_error("There is non-digit char" |
146a1439 MH |
476 | " in line number.\n"); |
477 | return -EINVAL; | |
478 | } | |
50656eec MH |
479 | break; |
480 | case '+': /* Byte offset from a symbol */ | |
481 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 482 | if (*tmp != '\0') { |
2a9c8c36 | 483 | semantic_error("There is non-digit character" |
146a1439 MH |
484 | " in offset.\n"); |
485 | return -EINVAL; | |
486 | } | |
50656eec MH |
487 | break; |
488 | case '@': /* File name */ | |
146a1439 MH |
489 | if (pp->file) { |
490 | semantic_error("SRC@SRC is not allowed.\n"); | |
491 | return -EINVAL; | |
492 | } | |
02b95dad MH |
493 | pp->file = strdup(arg); |
494 | if (pp->file == NULL) | |
495 | return -ENOMEM; | |
50656eec MH |
496 | break; |
497 | case '%': /* Probe places */ | |
498 | if (strcmp(arg, "return") == 0) { | |
499 | pp->retprobe = 1; | |
146a1439 MH |
500 | } else { /* Others not supported yet */ |
501 | semantic_error("%%%s is not supported.\n", arg); | |
502 | return -ENOTSUP; | |
503 | } | |
50656eec | 504 | break; |
146a1439 MH |
505 | default: /* Buggy case */ |
506 | pr_err("This program has a bug at %s:%d.\n", | |
507 | __FILE__, __LINE__); | |
508 | return -ENOTSUP; | |
50656eec MH |
509 | break; |
510 | } | |
511 | } | |
512 | ||
513 | /* Exclusion check */ | |
146a1439 | 514 | if (pp->lazy_line && pp->line) { |
2a9c8c36 | 515 | semantic_error("Lazy pattern can't be used with line number."); |
146a1439 MH |
516 | return -EINVAL; |
517 | } | |
2a9c8c36 | 518 | |
146a1439 | 519 | if (pp->lazy_line && pp->offset) { |
2a9c8c36 | 520 | semantic_error("Lazy pattern can't be used with offset."); |
146a1439 MH |
521 | return -EINVAL; |
522 | } | |
2a9c8c36 | 523 | |
146a1439 | 524 | if (pp->line && pp->offset) { |
50656eec | 525 | semantic_error("Offset can't be used with line number."); |
146a1439 MH |
526 | return -EINVAL; |
527 | } | |
50656eec | 528 | |
146a1439 | 529 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 MH |
530 | semantic_error("File always requires line number or " |
531 | "lazy pattern."); | |
146a1439 MH |
532 | return -EINVAL; |
533 | } | |
50656eec | 534 | |
146a1439 | 535 | if (pp->offset && !pp->function) { |
50656eec | 536 | semantic_error("Offset requires an entry function."); |
146a1439 MH |
537 | return -EINVAL; |
538 | } | |
50656eec | 539 | |
146a1439 | 540 | if (pp->retprobe && !pp->function) { |
50656eec | 541 | semantic_error("Return probe requires an entry function."); |
146a1439 MH |
542 | return -EINVAL; |
543 | } | |
50656eec | 544 | |
146a1439 | 545 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 MH |
546 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
547 | "return probe."); | |
146a1439 MH |
548 | return -EINVAL; |
549 | } | |
50656eec | 550 | |
4235b045 | 551 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
552 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
553 | pp->lazy_line); | |
146a1439 | 554 | return 0; |
50656eec MH |
555 | } |
556 | ||
7df2f329 | 557 | /* Parse perf-probe event argument */ |
146a1439 | 558 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 559 | { |
b2a3c12b | 560 | char *tmp, *goodname; |
7df2f329 MH |
561 | struct perf_probe_arg_field **fieldp; |
562 | ||
563 | pr_debug("parsing arg: %s into ", str); | |
564 | ||
48481938 MH |
565 | tmp = strchr(str, '='); |
566 | if (tmp) { | |
02b95dad MH |
567 | arg->name = strndup(str, tmp - str); |
568 | if (arg->name == NULL) | |
569 | return -ENOMEM; | |
11a1ca35 | 570 | pr_debug("name:%s ", arg->name); |
48481938 MH |
571 | str = tmp + 1; |
572 | } | |
573 | ||
11a1ca35 MH |
574 | tmp = strchr(str, ':'); |
575 | if (tmp) { /* Type setting */ | |
576 | *tmp = '\0'; | |
02b95dad MH |
577 | arg->type = strdup(tmp + 1); |
578 | if (arg->type == NULL) | |
579 | return -ENOMEM; | |
11a1ca35 MH |
580 | pr_debug("type:%s ", arg->type); |
581 | } | |
582 | ||
b2a3c12b | 583 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
584 | if (!is_c_varname(str) || !tmp) { |
585 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
586 | arg->var = strdup(str); |
587 | if (arg->var == NULL) | |
588 | return -ENOMEM; | |
48481938 | 589 | pr_debug("%s\n", arg->var); |
146a1439 | 590 | return 0; |
7df2f329 MH |
591 | } |
592 | ||
b2a3c12b | 593 | /* Structure fields or array element */ |
02b95dad MH |
594 | arg->var = strndup(str, tmp - str); |
595 | if (arg->var == NULL) | |
596 | return -ENOMEM; | |
b2a3c12b | 597 | goodname = arg->var; |
48481938 | 598 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
599 | fieldp = &arg->field; |
600 | ||
601 | do { | |
e334016f MH |
602 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
603 | if (*fieldp == NULL) | |
604 | return -ENOMEM; | |
b2a3c12b MH |
605 | if (*tmp == '[') { /* Array */ |
606 | str = tmp; | |
607 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 608 | (*fieldp)->ref = true; |
b2a3c12b MH |
609 | if (*tmp != ']' || tmp == str + 1) { |
610 | semantic_error("Array index must be a" | |
611 | " number.\n"); | |
612 | return -EINVAL; | |
613 | } | |
614 | tmp++; | |
615 | if (*tmp == '\0') | |
616 | tmp = NULL; | |
617 | } else { /* Structure */ | |
618 | if (*tmp == '.') { | |
619 | str = tmp + 1; | |
620 | (*fieldp)->ref = false; | |
621 | } else if (tmp[1] == '>') { | |
622 | str = tmp + 2; | |
623 | (*fieldp)->ref = true; | |
624 | } else { | |
625 | semantic_error("Argument parse error: %s\n", | |
626 | str); | |
627 | return -EINVAL; | |
628 | } | |
629 | tmp = strpbrk(str, "-.["); | |
146a1439 | 630 | } |
7df2f329 | 631 | if (tmp) { |
02b95dad MH |
632 | (*fieldp)->name = strndup(str, tmp - str); |
633 | if ((*fieldp)->name == NULL) | |
634 | return -ENOMEM; | |
b2a3c12b MH |
635 | if (*str != '[') |
636 | goodname = (*fieldp)->name; | |
7df2f329 MH |
637 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
638 | fieldp = &(*fieldp)->next; | |
639 | } | |
640 | } while (tmp); | |
02b95dad MH |
641 | (*fieldp)->name = strdup(str); |
642 | if ((*fieldp)->name == NULL) | |
643 | return -ENOMEM; | |
b2a3c12b MH |
644 | if (*str != '[') |
645 | goodname = (*fieldp)->name; | |
7df2f329 | 646 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 647 | |
b2a3c12b | 648 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 649 | if (!arg->name) { |
b2a3c12b | 650 | arg->name = strdup(goodname); |
02b95dad MH |
651 | if (arg->name == NULL) |
652 | return -ENOMEM; | |
653 | } | |
146a1439 | 654 | return 0; |
7df2f329 MH |
655 | } |
656 | ||
4235b045 | 657 | /* Parse perf-probe event command */ |
146a1439 | 658 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 659 | { |
e1c01d61 | 660 | char **argv; |
146a1439 | 661 | int argc, i, ret = 0; |
fac13fd5 | 662 | |
4235b045 | 663 | argv = argv_split(cmd, &argc); |
146a1439 MH |
664 | if (!argv) { |
665 | pr_debug("Failed to split arguments.\n"); | |
666 | return -ENOMEM; | |
667 | } | |
668 | if (argc - 1 > MAX_PROBE_ARGS) { | |
669 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
670 | ret = -ERANGE; | |
671 | goto out; | |
672 | } | |
50656eec | 673 | /* Parse probe point */ |
146a1439 MH |
674 | ret = parse_perf_probe_point(argv[0], pev); |
675 | if (ret < 0) | |
676 | goto out; | |
50656eec | 677 | |
e1c01d61 | 678 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 679 | pev->nargs = argc - 1; |
e334016f MH |
680 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
681 | if (pev->args == NULL) { | |
682 | ret = -ENOMEM; | |
683 | goto out; | |
684 | } | |
146a1439 MH |
685 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
686 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
687 | if (ret >= 0 && | |
688 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 689 | semantic_error("You can't specify local variable for" |
146a1439 MH |
690 | " kretprobe.\n"); |
691 | ret = -EINVAL; | |
692 | } | |
e1c01d61 | 693 | } |
146a1439 | 694 | out: |
e1c01d61 | 695 | argv_free(argv); |
146a1439 MH |
696 | |
697 | return ret; | |
50656eec MH |
698 | } |
699 | ||
4235b045 MH |
700 | /* Return true if this perf_probe_event requires debuginfo */ |
701 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
702 | { | |
703 | int i; | |
704 | ||
705 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
706 | return true; | |
707 | ||
708 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 709 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
710 | return true; |
711 | ||
712 | return false; | |
713 | } | |
714 | ||
4de189fe | 715 | /* Parse kprobe_events event into struct probe_point */ |
146a1439 | 716 | int parse_kprobe_trace_command(const char *cmd, struct kprobe_trace_event *tev) |
4de189fe | 717 | { |
4235b045 | 718 | struct kprobe_trace_point *tp = &tev->point; |
4de189fe MH |
719 | char pr; |
720 | char *p; | |
721 | int ret, i, argc; | |
722 | char **argv; | |
723 | ||
4235b045 MH |
724 | pr_debug("Parsing kprobe_events: %s\n", cmd); |
725 | argv = argv_split(cmd, &argc); | |
146a1439 MH |
726 | if (!argv) { |
727 | pr_debug("Failed to split arguments.\n"); | |
728 | return -ENOMEM; | |
729 | } | |
730 | if (argc < 2) { | |
731 | semantic_error("Too few probe arguments.\n"); | |
732 | ret = -ERANGE; | |
733 | goto out; | |
734 | } | |
4de189fe MH |
735 | |
736 | /* Scan event and group name. */ | |
93aaa45a | 737 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
738 | &pr, (float *)(void *)&tev->group, |
739 | (float *)(void *)&tev->event); | |
146a1439 MH |
740 | if (ret != 3) { |
741 | semantic_error("Failed to parse event name: %s\n", argv[0]); | |
742 | ret = -EINVAL; | |
743 | goto out; | |
744 | } | |
4235b045 | 745 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 746 | |
4235b045 | 747 | tp->retprobe = (pr == 'r'); |
4de189fe MH |
748 | |
749 | /* Scan function name and offset */ | |
4235b045 MH |
750 | ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol, |
751 | &tp->offset); | |
4de189fe | 752 | if (ret == 1) |
4235b045 | 753 | tp->offset = 0; |
4de189fe | 754 | |
4235b045 | 755 | tev->nargs = argc - 2; |
e334016f MH |
756 | tev->args = zalloc(sizeof(struct kprobe_trace_arg) * tev->nargs); |
757 | if (tev->args == NULL) { | |
758 | ret = -ENOMEM; | |
759 | goto out; | |
760 | } | |
4235b045 | 761 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
762 | p = strchr(argv[i + 2], '='); |
763 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
764 | *p++ = '\0'; |
765 | else | |
766 | p = argv[i + 2]; | |
02b95dad | 767 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 768 | /* TODO: parse regs and offset */ |
02b95dad MH |
769 | tev->args[i].value = strdup(p); |
770 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
771 | ret = -ENOMEM; | |
772 | goto out; | |
773 | } | |
4de189fe | 774 | } |
146a1439 MH |
775 | ret = 0; |
776 | out: | |
4de189fe | 777 | argv_free(argv); |
146a1439 | 778 | return ret; |
4de189fe MH |
779 | } |
780 | ||
7df2f329 MH |
781 | /* Compose only probe arg */ |
782 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
783 | { | |
784 | struct perf_probe_arg_field *field = pa->field; | |
785 | int ret; | |
786 | char *tmp = buf; | |
787 | ||
48481938 MH |
788 | if (pa->name && pa->var) |
789 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
790 | else | |
791 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
792 | if (ret <= 0) |
793 | goto error; | |
794 | tmp += ret; | |
795 | len -= ret; | |
796 | ||
797 | while (field) { | |
b2a3c12b MH |
798 | if (field->name[0] == '[') |
799 | ret = e_snprintf(tmp, len, "%s", field->name); | |
800 | else | |
801 | ret = e_snprintf(tmp, len, "%s%s", | |
802 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
803 | if (ret <= 0) |
804 | goto error; | |
805 | tmp += ret; | |
806 | len -= ret; | |
807 | field = field->next; | |
808 | } | |
11a1ca35 MH |
809 | |
810 | if (pa->type) { | |
811 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
812 | if (ret <= 0) | |
813 | goto error; | |
814 | tmp += ret; | |
815 | len -= ret; | |
816 | } | |
817 | ||
7df2f329 MH |
818 | return tmp - buf; |
819 | error: | |
146a1439 MH |
820 | pr_debug("Failed to synthesize perf probe argument: %s", |
821 | strerror(-ret)); | |
822 | return ret; | |
7df2f329 MH |
823 | } |
824 | ||
4235b045 MH |
825 | /* Compose only probe point (not argument) */ |
826 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 827 | { |
fb1587d8 MH |
828 | char *buf, *tmp; |
829 | char offs[32] = "", line[32] = "", file[32] = ""; | |
830 | int ret, len; | |
4de189fe | 831 | |
e334016f MH |
832 | buf = zalloc(MAX_CMDLEN); |
833 | if (buf == NULL) { | |
834 | ret = -ENOMEM; | |
835 | goto error; | |
836 | } | |
4de189fe | 837 | if (pp->offset) { |
fb1587d8 | 838 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
839 | if (ret <= 0) |
840 | goto error; | |
841 | } | |
842 | if (pp->line) { | |
fb1587d8 MH |
843 | ret = e_snprintf(line, 32, ":%d", pp->line); |
844 | if (ret <= 0) | |
845 | goto error; | |
846 | } | |
847 | if (pp->file) { | |
dd259c5d | 848 | len = strlen(pp->file) - 31; |
fb1587d8 MH |
849 | if (len < 0) |
850 | len = 0; | |
851 | tmp = strchr(pp->file + len, '/'); | |
852 | if (!tmp) | |
dd259c5d | 853 | tmp = pp->file + len; |
fb1587d8 | 854 | ret = e_snprintf(file, 32, "@%s", tmp + 1); |
4de189fe MH |
855 | if (ret <= 0) |
856 | goto error; | |
857 | } | |
858 | ||
859 | if (pp->function) | |
fb1587d8 MH |
860 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
861 | offs, pp->retprobe ? "%return" : "", line, | |
862 | file); | |
4de189fe | 863 | else |
fb1587d8 | 864 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
865 | if (ret <= 0) |
866 | goto error; | |
867 | ||
868 | return buf; | |
7ef17aaf | 869 | error: |
146a1439 MH |
870 | pr_debug("Failed to synthesize perf probe point: %s", |
871 | strerror(-ret)); | |
e334016f MH |
872 | if (buf) |
873 | free(buf); | |
146a1439 | 874 | return NULL; |
7ef17aaf MH |
875 | } |
876 | ||
4235b045 MH |
877 | #if 0 |
878 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
879 | { |
880 | char *buf; | |
881 | int i, len, ret; | |
882 | ||
4235b045 MH |
883 | buf = synthesize_perf_probe_point(&pev->point); |
884 | if (!buf) | |
885 | return NULL; | |
4de189fe | 886 | |
4235b045 MH |
887 | len = strlen(buf); |
888 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 889 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
890 | pev->args[i].name); |
891 | if (ret <= 0) { | |
892 | free(buf); | |
893 | return NULL; | |
894 | } | |
4de189fe MH |
895 | len += ret; |
896 | } | |
4de189fe | 897 | |
4235b045 MH |
898 | return buf; |
899 | } | |
900 | #endif | |
901 | ||
902 | static int __synthesize_kprobe_trace_arg_ref(struct kprobe_trace_arg_ref *ref, | |
903 | char **buf, size_t *buflen, | |
904 | int depth) | |
905 | { | |
906 | int ret; | |
907 | if (ref->next) { | |
908 | depth = __synthesize_kprobe_trace_arg_ref(ref->next, buf, | |
909 | buflen, depth + 1); | |
910 | if (depth < 0) | |
911 | goto out; | |
912 | } | |
913 | ||
914 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
915 | if (ret < 0) | |
916 | depth = ret; | |
917 | else { | |
918 | *buf += ret; | |
919 | *buflen -= ret; | |
920 | } | |
921 | out: | |
922 | return depth; | |
4de189fe | 923 | |
4de189fe MH |
924 | } |
925 | ||
4235b045 MH |
926 | static int synthesize_kprobe_trace_arg(struct kprobe_trace_arg *arg, |
927 | char *buf, size_t buflen) | |
50656eec | 928 | { |
4235b045 MH |
929 | int ret, depth = 0; |
930 | char *tmp = buf; | |
931 | ||
932 | /* Argument name or separator */ | |
933 | if (arg->name) | |
934 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
935 | else | |
936 | ret = e_snprintf(buf, buflen, " "); | |
937 | if (ret < 0) | |
938 | return ret; | |
939 | buf += ret; | |
940 | buflen -= ret; | |
941 | ||
942 | /* Dereferencing arguments */ | |
943 | if (arg->ref) { | |
944 | depth = __synthesize_kprobe_trace_arg_ref(arg->ref, &buf, | |
945 | &buflen, 1); | |
946 | if (depth < 0) | |
947 | return depth; | |
948 | } | |
949 | ||
950 | /* Print argument value */ | |
951 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
952 | if (ret < 0) | |
953 | return ret; | |
954 | buf += ret; | |
955 | buflen -= ret; | |
956 | ||
957 | /* Closing */ | |
958 | while (depth--) { | |
959 | ret = e_snprintf(buf, buflen, ")"); | |
960 | if (ret < 0) | |
961 | return ret; | |
962 | buf += ret; | |
963 | buflen -= ret; | |
964 | } | |
4984912e MH |
965 | /* Print argument type */ |
966 | if (arg->type) { | |
967 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
968 | if (ret <= 0) | |
969 | return ret; | |
970 | buf += ret; | |
971 | } | |
4235b045 MH |
972 | |
973 | return buf - tmp; | |
974 | } | |
975 | ||
976 | char *synthesize_kprobe_trace_command(struct kprobe_trace_event *tev) | |
977 | { | |
978 | struct kprobe_trace_point *tp = &tev->point; | |
50656eec MH |
979 | char *buf; |
980 | int i, len, ret; | |
981 | ||
e334016f MH |
982 | buf = zalloc(MAX_CMDLEN); |
983 | if (buf == NULL) | |
984 | return NULL; | |
985 | ||
4235b045 MH |
986 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu", |
987 | tp->retprobe ? 'r' : 'p', | |
988 | tev->group, tev->event, | |
989 | tp->symbol, tp->offset); | |
990 | if (len <= 0) | |
50656eec | 991 | goto error; |
50656eec | 992 | |
4235b045 MH |
993 | for (i = 0; i < tev->nargs; i++) { |
994 | ret = synthesize_kprobe_trace_arg(&tev->args[i], buf + len, | |
995 | MAX_CMDLEN - len); | |
4de189fe | 996 | if (ret <= 0) |
50656eec MH |
997 | goto error; |
998 | len += ret; | |
999 | } | |
50656eec | 1000 | |
4235b045 | 1001 | return buf; |
50656eec | 1002 | error: |
4235b045 MH |
1003 | free(buf); |
1004 | return NULL; | |
1005 | } | |
50656eec | 1006 | |
146a1439 MH |
1007 | int convert_to_perf_probe_event(struct kprobe_trace_event *tev, |
1008 | struct perf_probe_event *pev) | |
4235b045 | 1009 | { |
02b95dad | 1010 | char buf[64] = ""; |
146a1439 | 1011 | int i, ret; |
4235b045 | 1012 | |
4b4da7f7 | 1013 | /* Convert event/group name */ |
02b95dad MH |
1014 | pev->event = strdup(tev->event); |
1015 | pev->group = strdup(tev->group); | |
1016 | if (pev->event == NULL || pev->group == NULL) | |
1017 | return -ENOMEM; | |
fb1587d8 | 1018 | |
4b4da7f7 | 1019 | /* Convert trace_point to probe_point */ |
146a1439 MH |
1020 | ret = convert_to_perf_probe_point(&tev->point, &pev->point); |
1021 | if (ret < 0) | |
1022 | return ret; | |
4b4da7f7 | 1023 | |
4235b045 MH |
1024 | /* Convert trace_arg to probe_arg */ |
1025 | pev->nargs = tev->nargs; | |
e334016f MH |
1026 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1027 | if (pev->args == NULL) | |
1028 | return -ENOMEM; | |
02b95dad | 1029 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1030 | if (tev->args[i].name) |
02b95dad | 1031 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1032 | else { |
146a1439 MH |
1033 | ret = synthesize_kprobe_trace_arg(&tev->args[i], |
1034 | buf, 64); | |
02b95dad | 1035 | pev->args[i].name = strdup(buf); |
4235b045 | 1036 | } |
02b95dad MH |
1037 | if (pev->args[i].name == NULL && ret >= 0) |
1038 | ret = -ENOMEM; | |
1039 | } | |
146a1439 MH |
1040 | |
1041 | if (ret < 0) | |
1042 | clear_perf_probe_event(pev); | |
1043 | ||
1044 | return ret; | |
4235b045 MH |
1045 | } |
1046 | ||
1047 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1048 | { | |
1049 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1050 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1051 | int i; |
1052 | ||
1053 | if (pev->event) | |
1054 | free(pev->event); | |
1055 | if (pev->group) | |
1056 | free(pev->group); | |
1057 | if (pp->file) | |
1058 | free(pp->file); | |
1059 | if (pp->function) | |
1060 | free(pp->function); | |
1061 | if (pp->lazy_line) | |
1062 | free(pp->lazy_line); | |
7df2f329 | 1063 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1064 | if (pev->args[i].name) |
1065 | free(pev->args[i].name); | |
48481938 MH |
1066 | if (pev->args[i].var) |
1067 | free(pev->args[i].var); | |
11a1ca35 MH |
1068 | if (pev->args[i].type) |
1069 | free(pev->args[i].type); | |
7df2f329 MH |
1070 | field = pev->args[i].field; |
1071 | while (field) { | |
1072 | next = field->next; | |
1073 | if (field->name) | |
1074 | free(field->name); | |
1075 | free(field); | |
1076 | field = next; | |
1077 | } | |
1078 | } | |
4235b045 MH |
1079 | if (pev->args) |
1080 | free(pev->args); | |
1081 | memset(pev, 0, sizeof(*pev)); | |
1082 | } | |
1083 | ||
1084 | void clear_kprobe_trace_event(struct kprobe_trace_event *tev) | |
1085 | { | |
1086 | struct kprobe_trace_arg_ref *ref, *next; | |
1087 | int i; | |
1088 | ||
1089 | if (tev->event) | |
1090 | free(tev->event); | |
1091 | if (tev->group) | |
1092 | free(tev->group); | |
1093 | if (tev->point.symbol) | |
1094 | free(tev->point.symbol); | |
1095 | for (i = 0; i < tev->nargs; i++) { | |
1096 | if (tev->args[i].name) | |
1097 | free(tev->args[i].name); | |
1098 | if (tev->args[i].value) | |
1099 | free(tev->args[i].value); | |
4984912e MH |
1100 | if (tev->args[i].type) |
1101 | free(tev->args[i].type); | |
4235b045 MH |
1102 | ref = tev->args[i].ref; |
1103 | while (ref) { | |
1104 | next = ref->next; | |
1105 | free(ref); | |
1106 | ref = next; | |
1107 | } | |
1108 | } | |
1109 | if (tev->args) | |
1110 | free(tev->args); | |
1111 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1112 | } |
1113 | ||
f4d7da49 | 1114 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
1115 | { |
1116 | char buf[PATH_MAX]; | |
7ca5989d | 1117 | const char *__debugfs; |
4de189fe MH |
1118 | int ret; |
1119 | ||
7ca5989d MH |
1120 | __debugfs = debugfs_find_mountpoint(); |
1121 | if (__debugfs == NULL) { | |
1122 | pr_warning("Debugfs is not mounted.\n"); | |
1123 | return -ENOENT; | |
1124 | } | |
1125 | ||
1126 | ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); | |
146a1439 | 1127 | if (ret >= 0) { |
7ca5989d | 1128 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1129 | if (readwrite && !probe_event_dry_run) |
1130 | ret = open(buf, O_RDWR, O_APPEND); | |
1131 | else | |
1132 | ret = open(buf, O_RDONLY, 0); | |
1133 | } | |
f4d7da49 | 1134 | |
4de189fe MH |
1135 | if (ret < 0) { |
1136 | if (errno == ENOENT) | |
146a1439 MH |
1137 | pr_warning("kprobe_events file does not exist - please" |
1138 | " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); | |
4de189fe | 1139 | else |
146a1439 MH |
1140 | pr_warning("Failed to open kprobe_events file: %s\n", |
1141 | strerror(errno)); | |
4de189fe MH |
1142 | } |
1143 | return ret; | |
1144 | } | |
1145 | ||
1146 | /* Get raw string list of current kprobe_events */ | |
4235b045 | 1147 | static struct strlist *get_kprobe_trace_command_rawlist(int fd) |
4de189fe MH |
1148 | { |
1149 | int ret, idx; | |
1150 | FILE *fp; | |
1151 | char buf[MAX_CMDLEN]; | |
1152 | char *p; | |
1153 | struct strlist *sl; | |
1154 | ||
1155 | sl = strlist__new(true, NULL); | |
1156 | ||
1157 | fp = fdopen(dup(fd), "r"); | |
1158 | while (!feof(fp)) { | |
1159 | p = fgets(buf, MAX_CMDLEN, fp); | |
1160 | if (!p) | |
1161 | break; | |
1162 | ||
1163 | idx = strlen(p) - 1; | |
1164 | if (p[idx] == '\n') | |
1165 | p[idx] = '\0'; | |
1166 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1167 | if (ret < 0) { |
1168 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1169 | strlist__delete(sl); | |
1170 | return NULL; | |
1171 | } | |
4de189fe MH |
1172 | } |
1173 | fclose(fp); | |
1174 | ||
1175 | return sl; | |
1176 | } | |
1177 | ||
278498d4 | 1178 | /* Show an event */ |
146a1439 | 1179 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1180 | { |
7e990a51 | 1181 | int i, ret; |
278498d4 | 1182 | char buf[128]; |
4235b045 | 1183 | char *place; |
278498d4 | 1184 | |
4235b045 MH |
1185 | /* Synthesize only event probe point */ |
1186 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1187 | if (!place) |
1188 | return -EINVAL; | |
4235b045 MH |
1189 | |
1190 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1191 | if (ret < 0) |
146a1439 MH |
1192 | return ret; |
1193 | ||
fb1587d8 | 1194 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1195 | |
4235b045 | 1196 | if (pev->nargs > 0) { |
278498d4 | 1197 | printf(" with"); |
7df2f329 | 1198 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1199 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1200 | buf, 128); | |
1201 | if (ret < 0) | |
1202 | break; | |
7df2f329 MH |
1203 | printf(" %s", buf); |
1204 | } | |
278498d4 MH |
1205 | } |
1206 | printf(")\n"); | |
4235b045 | 1207 | free(place); |
146a1439 | 1208 | return ret; |
278498d4 MH |
1209 | } |
1210 | ||
4de189fe | 1211 | /* List up current perf-probe events */ |
146a1439 | 1212 | int show_perf_probe_events(void) |
4de189fe | 1213 | { |
146a1439 | 1214 | int fd, ret; |
4235b045 MH |
1215 | struct kprobe_trace_event tev; |
1216 | struct perf_probe_event pev; | |
4de189fe MH |
1217 | struct strlist *rawlist; |
1218 | struct str_node *ent; | |
1219 | ||
72041334 | 1220 | setup_pager(); |
146a1439 MH |
1221 | ret = init_vmlinux(); |
1222 | if (ret < 0) | |
1223 | return ret; | |
4235b045 MH |
1224 | |
1225 | memset(&tev, 0, sizeof(tev)); | |
1226 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1227 | |
f4d7da49 | 1228 | fd = open_kprobe_events(false); |
146a1439 MH |
1229 | if (fd < 0) |
1230 | return fd; | |
1231 | ||
4235b045 | 1232 | rawlist = get_kprobe_trace_command_rawlist(fd); |
4de189fe | 1233 | close(fd); |
146a1439 MH |
1234 | if (!rawlist) |
1235 | return -ENOENT; | |
4de189fe | 1236 | |
adf365f4 | 1237 | strlist__for_each(ent, rawlist) { |
146a1439 MH |
1238 | ret = parse_kprobe_trace_command(ent->s, &tev); |
1239 | if (ret >= 0) { | |
1240 | ret = convert_to_perf_probe_event(&tev, &pev); | |
1241 | if (ret >= 0) | |
1242 | ret = show_perf_probe_event(&pev); | |
1243 | } | |
4235b045 MH |
1244 | clear_perf_probe_event(&pev); |
1245 | clear_kprobe_trace_event(&tev); | |
146a1439 MH |
1246 | if (ret < 0) |
1247 | break; | |
4de189fe | 1248 | } |
4de189fe | 1249 | strlist__delete(rawlist); |
146a1439 MH |
1250 | |
1251 | return ret; | |
4de189fe MH |
1252 | } |
1253 | ||
b498ce1f | 1254 | /* Get current perf-probe event names */ |
4235b045 | 1255 | static struct strlist *get_kprobe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1256 | { |
fa28244d | 1257 | char buf[128]; |
b498ce1f MH |
1258 | struct strlist *sl, *rawlist; |
1259 | struct str_node *ent; | |
4235b045 | 1260 | struct kprobe_trace_event tev; |
146a1439 | 1261 | int ret = 0; |
b498ce1f | 1262 | |
4235b045 | 1263 | memset(&tev, 0, sizeof(tev)); |
b498ce1f | 1264 | |
4235b045 | 1265 | rawlist = get_kprobe_trace_command_rawlist(fd); |
e1d2017b | 1266 | sl = strlist__new(true, NULL); |
adf365f4 | 1267 | strlist__for_each(ent, rawlist) { |
146a1439 MH |
1268 | ret = parse_kprobe_trace_command(ent->s, &tev); |
1269 | if (ret < 0) | |
1270 | break; | |
fa28244d | 1271 | if (include_group) { |
146a1439 MH |
1272 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1273 | tev.event); | |
1274 | if (ret >= 0) | |
1275 | ret = strlist__add(sl, buf); | |
fa28244d | 1276 | } else |
146a1439 | 1277 | ret = strlist__add(sl, tev.event); |
4235b045 | 1278 | clear_kprobe_trace_event(&tev); |
146a1439 MH |
1279 | if (ret < 0) |
1280 | break; | |
b498ce1f | 1281 | } |
b498ce1f MH |
1282 | strlist__delete(rawlist); |
1283 | ||
146a1439 MH |
1284 | if (ret < 0) { |
1285 | strlist__delete(sl); | |
1286 | return NULL; | |
1287 | } | |
b498ce1f MH |
1288 | return sl; |
1289 | } | |
1290 | ||
146a1439 | 1291 | static int write_kprobe_trace_event(int fd, struct kprobe_trace_event *tev) |
50656eec | 1292 | { |
6eca8cc3 | 1293 | int ret = 0; |
4235b045 | 1294 | char *buf = synthesize_kprobe_trace_command(tev); |
50656eec | 1295 | |
146a1439 MH |
1296 | if (!buf) { |
1297 | pr_debug("Failed to synthesize kprobe trace event.\n"); | |
1298 | return -EINVAL; | |
1299 | } | |
1300 | ||
fa28244d | 1301 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1302 | if (!probe_event_dry_run) { |
1303 | ret = write(fd, buf, strlen(buf)); | |
1304 | if (ret <= 0) | |
146a1439 MH |
1305 | pr_warning("Failed to write event: %s\n", |
1306 | strerror(errno)); | |
f4d7da49 | 1307 | } |
4235b045 | 1308 | free(buf); |
146a1439 | 1309 | return ret; |
50656eec MH |
1310 | } |
1311 | ||
146a1439 MH |
1312 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1313 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1314 | { |
1315 | int i, ret; | |
17f88fcd MH |
1316 | |
1317 | /* Try no suffix */ | |
1318 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1319 | if (ret < 0) { |
1320 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1321 | return ret; | |
1322 | } | |
17f88fcd | 1323 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1324 | return 0; |
17f88fcd | 1325 | |
d761b08b MH |
1326 | if (!allow_suffix) { |
1327 | pr_warning("Error: event \"%s\" already exists. " | |
1328 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1329 | return -EEXIST; |
d761b08b MH |
1330 | } |
1331 | ||
17f88fcd MH |
1332 | /* Try to add suffix */ |
1333 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1334 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1335 | if (ret < 0) { |
1336 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1337 | return ret; | |
1338 | } | |
b498ce1f MH |
1339 | if (!strlist__has_entry(namelist, buf)) |
1340 | break; | |
1341 | } | |
146a1439 MH |
1342 | if (i == MAX_EVENT_INDEX) { |
1343 | pr_warning("Too many events are on the same function.\n"); | |
1344 | ret = -ERANGE; | |
1345 | } | |
1346 | ||
1347 | return ret; | |
b498ce1f MH |
1348 | } |
1349 | ||
146a1439 MH |
1350 | static int __add_kprobe_trace_events(struct perf_probe_event *pev, |
1351 | struct kprobe_trace_event *tevs, | |
1352 | int ntevs, bool allow_suffix) | |
50656eec | 1353 | { |
146a1439 | 1354 | int i, fd, ret; |
55632770 | 1355 | struct kprobe_trace_event *tev = NULL; |
4235b045 MH |
1356 | char buf[64]; |
1357 | const char *event, *group; | |
b498ce1f | 1358 | struct strlist *namelist; |
50656eec | 1359 | |
f4d7da49 | 1360 | fd = open_kprobe_events(true); |
146a1439 MH |
1361 | if (fd < 0) |
1362 | return fd; | |
b498ce1f | 1363 | /* Get current event names */ |
4235b045 | 1364 | namelist = get_kprobe_trace_event_names(fd, false); |
146a1439 MH |
1365 | if (!namelist) { |
1366 | pr_debug("Failed to get current event list.\n"); | |
1367 | return -EIO; | |
1368 | } | |
4235b045 | 1369 | |
146a1439 | 1370 | ret = 0; |
4235b045 | 1371 | printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1372 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1373 | tev = &tevs[i]; |
1374 | if (pev->event) | |
1375 | event = pev->event; | |
1376 | else | |
1377 | if (pev->point.function) | |
1378 | event = pev->point.function; | |
1379 | else | |
1380 | event = tev->point.symbol; | |
1381 | if (pev->group) | |
1382 | group = pev->group; | |
1383 | else | |
1384 | group = PERFPROBE_GROUP; | |
1385 | ||
1386 | /* Get an unused new event name */ | |
146a1439 MH |
1387 | ret = get_new_event_name(buf, 64, event, |
1388 | namelist, allow_suffix); | |
1389 | if (ret < 0) | |
1390 | break; | |
4235b045 MH |
1391 | event = buf; |
1392 | ||
02b95dad MH |
1393 | tev->event = strdup(event); |
1394 | tev->group = strdup(group); | |
1395 | if (tev->event == NULL || tev->group == NULL) { | |
1396 | ret = -ENOMEM; | |
1397 | break; | |
1398 | } | |
146a1439 MH |
1399 | ret = write_kprobe_trace_event(fd, tev); |
1400 | if (ret < 0) | |
1401 | break; | |
4235b045 MH |
1402 | /* Add added event name to namelist */ |
1403 | strlist__add(namelist, event); | |
1404 | ||
1405 | /* Trick here - save current event/group */ | |
1406 | event = pev->event; | |
1407 | group = pev->group; | |
1408 | pev->event = tev->event; | |
1409 | pev->group = tev->group; | |
1410 | show_perf_probe_event(pev); | |
1411 | /* Trick here - restore current event/group */ | |
1412 | pev->event = (char *)event; | |
1413 | pev->group = (char *)group; | |
1414 | ||
1415 | /* | |
1416 | * Probes after the first probe which comes from same | |
1417 | * user input are always allowed to add suffix, because | |
1418 | * there might be several addresses corresponding to | |
1419 | * one code line. | |
1420 | */ | |
1421 | allow_suffix = true; | |
50656eec | 1422 | } |
146a1439 MH |
1423 | |
1424 | if (ret >= 0) { | |
1425 | /* Show how to use the event. */ | |
1426 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
1427 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
1428 | tev->event); | |
1429 | } | |
a9b495b0 | 1430 | |
e1d2017b | 1431 | strlist__delete(namelist); |
50656eec | 1432 | close(fd); |
146a1439 | 1433 | return ret; |
50656eec | 1434 | } |
fa28244d | 1435 | |
4235b045 | 1436 | static int convert_to_kprobe_trace_events(struct perf_probe_event *pev, |
ef4a3565 MH |
1437 | struct kprobe_trace_event **tevs, |
1438 | int max_tevs) | |
e0faa8d3 MH |
1439 | { |
1440 | struct symbol *sym; | |
e334016f | 1441 | int ret = 0, i; |
4235b045 MH |
1442 | struct kprobe_trace_event *tev; |
1443 | ||
4b4da7f7 | 1444 | /* Convert perf_probe_event with debuginfo */ |
ef4a3565 | 1445 | ret = try_to_find_kprobe_trace_events(pev, tevs, max_tevs); |
e334016f MH |
1446 | if (ret != 0) |
1447 | return ret; | |
e0faa8d3 | 1448 | |
4235b045 | 1449 | /* Allocate trace event buffer */ |
e334016f MH |
1450 | tev = *tevs = zalloc(sizeof(struct kprobe_trace_event)); |
1451 | if (tev == NULL) | |
1452 | return -ENOMEM; | |
4235b045 MH |
1453 | |
1454 | /* Copy parameters */ | |
02b95dad MH |
1455 | tev->point.symbol = strdup(pev->point.function); |
1456 | if (tev->point.symbol == NULL) { | |
1457 | ret = -ENOMEM; | |
1458 | goto error; | |
1459 | } | |
4235b045 MH |
1460 | tev->point.offset = pev->point.offset; |
1461 | tev->nargs = pev->nargs; | |
1462 | if (tev->nargs) { | |
e334016f MH |
1463 | tev->args = zalloc(sizeof(struct kprobe_trace_arg) |
1464 | * tev->nargs); | |
1465 | if (tev->args == NULL) { | |
02b95dad MH |
1466 | ret = -ENOMEM; |
1467 | goto error; | |
e334016f | 1468 | } |
48481938 | 1469 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1470 | if (pev->args[i].name) { |
1471 | tev->args[i].name = strdup(pev->args[i].name); | |
1472 | if (tev->args[i].name == NULL) { | |
1473 | ret = -ENOMEM; | |
1474 | goto error; | |
1475 | } | |
1476 | } | |
1477 | tev->args[i].value = strdup(pev->args[i].var); | |
1478 | if (tev->args[i].value == NULL) { | |
1479 | ret = -ENOMEM; | |
1480 | goto error; | |
1481 | } | |
1482 | if (pev->args[i].type) { | |
1483 | tev->args[i].type = strdup(pev->args[i].type); | |
1484 | if (tev->args[i].type == NULL) { | |
1485 | ret = -ENOMEM; | |
1486 | goto error; | |
1487 | } | |
1488 | } | |
48481938 | 1489 | } |
4235b045 MH |
1490 | } |
1491 | ||
1492 | /* Currently just checking function name from symbol map */ | |
d28c6223 | 1493 | sym = map__find_symbol_by_name(machine.vmlinux_maps[MAP__FUNCTION], |
4235b045 | 1494 | tev->point.symbol, NULL); |
146a1439 MH |
1495 | if (!sym) { |
1496 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1497 | tev->point.symbol); | |
02b95dad MH |
1498 | ret = -ENOENT; |
1499 | goto error; | |
1500 | } | |
e334016f | 1501 | |
02b95dad MH |
1502 | return 1; |
1503 | error: | |
1504 | clear_kprobe_trace_event(tev); | |
1505 | free(tev); | |
1506 | *tevs = NULL; | |
e334016f | 1507 | return ret; |
4235b045 MH |
1508 | } |
1509 | ||
1510 | struct __event_package { | |
1511 | struct perf_probe_event *pev; | |
1512 | struct kprobe_trace_event *tevs; | |
1513 | int ntevs; | |
1514 | }; | |
1515 | ||
146a1439 | 1516 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
ef4a3565 | 1517 | bool force_add, int max_tevs) |
4235b045 | 1518 | { |
146a1439 | 1519 | int i, j, ret; |
4235b045 MH |
1520 | struct __event_package *pkgs; |
1521 | ||
e334016f MH |
1522 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
1523 | if (pkgs == NULL) | |
1524 | return -ENOMEM; | |
4235b045 MH |
1525 | |
1526 | /* Init vmlinux path */ | |
146a1439 MH |
1527 | ret = init_vmlinux(); |
1528 | if (ret < 0) | |
1529 | return ret; | |
4235b045 MH |
1530 | |
1531 | /* Loop 1: convert all events */ | |
1532 | for (i = 0; i < npevs; i++) { | |
1533 | pkgs[i].pev = &pevs[i]; | |
1534 | /* Convert with or without debuginfo */ | |
146a1439 | 1535 | ret = convert_to_kprobe_trace_events(pkgs[i].pev, |
ef4a3565 | 1536 | &pkgs[i].tevs, max_tevs); |
146a1439 MH |
1537 | if (ret < 0) |
1538 | goto end; | |
1539 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
1540 | } |
1541 | ||
4235b045 | 1542 | /* Loop 2: add all events */ |
146a1439 MH |
1543 | for (i = 0; i < npevs && ret >= 0; i++) |
1544 | ret = __add_kprobe_trace_events(pkgs[i].pev, pkgs[i].tevs, | |
1545 | pkgs[i].ntevs, force_add); | |
1546 | end: | |
1547 | /* Loop 3: cleanup trace events */ | |
4235b045 | 1548 | for (i = 0; i < npevs; i++) |
146a1439 MH |
1549 | for (j = 0; j < pkgs[i].ntevs; j++) |
1550 | clear_kprobe_trace_event(&pkgs[i].tevs[j]); | |
1551 | ||
1552 | return ret; | |
e0faa8d3 MH |
1553 | } |
1554 | ||
146a1439 | 1555 | static int __del_trace_kprobe_event(int fd, struct str_node *ent) |
bbbb521b MH |
1556 | { |
1557 | char *p; | |
1558 | char buf[128]; | |
4235b045 | 1559 | int ret; |
bbbb521b MH |
1560 | |
1561 | /* Convert from perf-probe event to trace-kprobe event */ | |
146a1439 MH |
1562 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
1563 | if (ret < 0) | |
1564 | goto error; | |
1565 | ||
bbbb521b | 1566 | p = strchr(buf + 2, ':'); |
146a1439 MH |
1567 | if (!p) { |
1568 | pr_debug("Internal error: %s should have ':' but not.\n", | |
1569 | ent->s); | |
1570 | ret = -ENOTSUP; | |
1571 | goto error; | |
1572 | } | |
bbbb521b MH |
1573 | *p = '/'; |
1574 | ||
4235b045 MH |
1575 | pr_debug("Writing event: %s\n", buf); |
1576 | ret = write(fd, buf, strlen(buf)); | |
146a1439 MH |
1577 | if (ret < 0) |
1578 | goto error; | |
1579 | ||
bbbb521b | 1580 | printf("Remove event: %s\n", ent->s); |
146a1439 MH |
1581 | return 0; |
1582 | error: | |
1583 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
1584 | return ret; | |
bbbb521b MH |
1585 | } |
1586 | ||
146a1439 MH |
1587 | static int del_trace_kprobe_event(int fd, const char *group, |
1588 | const char *event, struct strlist *namelist) | |
fa28244d MH |
1589 | { |
1590 | char buf[128]; | |
bbbb521b | 1591 | struct str_node *ent, *n; |
146a1439 | 1592 | int found = 0, ret = 0; |
fa28244d | 1593 | |
146a1439 MH |
1594 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
1595 | if (ret < 0) { | |
1596 | pr_err("Failed to copy event."); | |
1597 | return ret; | |
1598 | } | |
fa28244d | 1599 | |
bbbb521b MH |
1600 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
1601 | strlist__for_each_safe(ent, n, namelist) | |
1602 | if (strglobmatch(ent->s, buf)) { | |
1603 | found++; | |
146a1439 MH |
1604 | ret = __del_trace_kprobe_event(fd, ent); |
1605 | if (ret < 0) | |
1606 | break; | |
bbbb521b MH |
1607 | strlist__remove(namelist, ent); |
1608 | } | |
1609 | } else { | |
1610 | ent = strlist__find(namelist, buf); | |
1611 | if (ent) { | |
1612 | found++; | |
146a1439 MH |
1613 | ret = __del_trace_kprobe_event(fd, ent); |
1614 | if (ret >= 0) | |
1615 | strlist__remove(namelist, ent); | |
bbbb521b MH |
1616 | } |
1617 | } | |
146a1439 MH |
1618 | if (found == 0 && ret >= 0) |
1619 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
1620 | ||
1621 | return ret; | |
fa28244d MH |
1622 | } |
1623 | ||
146a1439 | 1624 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 1625 | { |
146a1439 | 1626 | int fd, ret = 0; |
fa28244d MH |
1627 | const char *group, *event; |
1628 | char *p, *str; | |
1629 | struct str_node *ent; | |
1630 | struct strlist *namelist; | |
1631 | ||
f4d7da49 | 1632 | fd = open_kprobe_events(true); |
146a1439 MH |
1633 | if (fd < 0) |
1634 | return fd; | |
1635 | ||
fa28244d | 1636 | /* Get current event names */ |
4235b045 | 1637 | namelist = get_kprobe_trace_event_names(fd, true); |
146a1439 MH |
1638 | if (namelist == NULL) |
1639 | return -EINVAL; | |
fa28244d | 1640 | |
adf365f4 | 1641 | strlist__for_each(ent, dellist) { |
02b95dad MH |
1642 | str = strdup(ent->s); |
1643 | if (str == NULL) { | |
1644 | ret = -ENOMEM; | |
1645 | break; | |
1646 | } | |
bbbb521b | 1647 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
1648 | p = strchr(str, ':'); |
1649 | if (p) { | |
1650 | group = str; | |
1651 | *p = '\0'; | |
1652 | event = p + 1; | |
1653 | } else { | |
bbbb521b | 1654 | group = "*"; |
fa28244d MH |
1655 | event = str; |
1656 | } | |
bbbb521b | 1657 | pr_debug("Group: %s, Event: %s\n", group, event); |
146a1439 | 1658 | ret = del_trace_kprobe_event(fd, group, event, namelist); |
fa28244d | 1659 | free(str); |
146a1439 MH |
1660 | if (ret < 0) |
1661 | break; | |
fa28244d MH |
1662 | } |
1663 | strlist__delete(namelist); | |
1664 | close(fd); | |
146a1439 MH |
1665 | |
1666 | return ret; | |
fa28244d MH |
1667 | } |
1668 |