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 | ||
7cf0b79e MH |
198 | /* |
199 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
200 | * and chop off leading directories that do not exist. Result is passed back as | |
201 | * a newly allocated path on success. | |
202 | * Return 0 if file was found and readable, -errno otherwise. | |
203 | */ | |
204 | static int get_real_path(const char *raw_path, char **new_path) | |
205 | { | |
206 | if (!symbol_conf.source_prefix) { | |
207 | if (access(raw_path, R_OK) == 0) { | |
208 | *new_path = strdup(raw_path); | |
209 | return 0; | |
210 | } else | |
211 | return -errno; | |
212 | } | |
213 | ||
214 | *new_path = malloc((strlen(symbol_conf.source_prefix) + | |
215 | strlen(raw_path) + 2)); | |
216 | if (!*new_path) | |
217 | return -ENOMEM; | |
218 | ||
219 | for (;;) { | |
220 | sprintf(*new_path, "%s/%s", symbol_conf.source_prefix, | |
221 | raw_path); | |
222 | ||
223 | if (access(*new_path, R_OK) == 0) | |
224 | return 0; | |
225 | ||
226 | switch (errno) { | |
227 | case ENAMETOOLONG: | |
228 | case ENOENT: | |
229 | case EROFS: | |
230 | case EFAULT: | |
231 | raw_path = strchr(++raw_path, '/'); | |
232 | if (!raw_path) { | |
233 | free(*new_path); | |
234 | *new_path = NULL; | |
235 | return -ENOENT; | |
236 | } | |
237 | continue; | |
238 | ||
239 | default: | |
240 | free(*new_path); | |
241 | *new_path = NULL; | |
242 | return -errno; | |
243 | } | |
244 | } | |
245 | } | |
246 | ||
4b4da7f7 MH |
247 | #define LINEBUF_SIZE 256 |
248 | #define NR_ADDITIONAL_LINES 2 | |
249 | ||
d3b63d7a | 250 | static int show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
251 | { |
252 | char buf[LINEBUF_SIZE]; | |
253 | const char *color = PERF_COLOR_BLUE; | |
254 | ||
255 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
256 | goto error; | |
257 | if (!skip) { | |
258 | if (show_num) | |
d3b63d7a | 259 | fprintf(stdout, "%7d %s", l, buf); |
4b4da7f7 MH |
260 | else |
261 | color_fprintf(stdout, color, " %s", buf); | |
262 | } | |
263 | ||
264 | while (strlen(buf) == LINEBUF_SIZE - 1 && | |
265 | buf[LINEBUF_SIZE - 2] != '\n') { | |
266 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
267 | goto error; | |
268 | if (!skip) { | |
269 | if (show_num) | |
270 | fprintf(stdout, "%s", buf); | |
271 | else | |
272 | color_fprintf(stdout, color, "%s", buf); | |
273 | } | |
274 | } | |
146a1439 MH |
275 | |
276 | return 0; | |
4b4da7f7 MH |
277 | error: |
278 | if (feof(fp)) | |
146a1439 | 279 | pr_warning("Source file is shorter than expected.\n"); |
4b4da7f7 | 280 | else |
146a1439 MH |
281 | pr_warning("File read error: %s\n", strerror(errno)); |
282 | ||
283 | return -1; | |
4b4da7f7 MH |
284 | } |
285 | ||
286 | /* | |
287 | * Show line-range always requires debuginfo to find source file and | |
288 | * line number. | |
289 | */ | |
146a1439 | 290 | int show_line_range(struct line_range *lr) |
4b4da7f7 | 291 | { |
d3b63d7a | 292 | int l = 1; |
4b4da7f7 MH |
293 | struct line_node *ln; |
294 | FILE *fp; | |
295 | int fd, ret; | |
7cf0b79e | 296 | char *tmp; |
4b4da7f7 MH |
297 | |
298 | /* Search a line range */ | |
146a1439 MH |
299 | ret = init_vmlinux(); |
300 | if (ret < 0) | |
301 | return ret; | |
302 | ||
4b4da7f7 | 303 | fd = open_vmlinux(); |
146a1439 MH |
304 | if (fd < 0) { |
305 | pr_warning("Failed to open debuginfo file.\n"); | |
306 | return fd; | |
307 | } | |
308 | ||
4b4da7f7 | 309 | ret = find_line_range(fd, lr); |
4b4da7f7 | 310 | close(fd); |
146a1439 MH |
311 | if (ret == 0) { |
312 | pr_warning("Specified source line is not found.\n"); | |
313 | return -ENOENT; | |
314 | } else if (ret < 0) { | |
315 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
316 | return ret; | |
317 | } | |
4b4da7f7 | 318 | |
7cf0b79e MH |
319 | /* Convert source file path */ |
320 | tmp = lr->path; | |
321 | ret = get_real_path(tmp, &lr->path); | |
322 | free(tmp); /* Free old path */ | |
323 | if (ret < 0) { | |
324 | pr_warning("Failed to find source file. (%d)\n", ret); | |
325 | return ret; | |
326 | } | |
327 | ||
4b4da7f7 MH |
328 | setup_pager(); |
329 | ||
330 | if (lr->function) | |
331 | fprintf(stdout, "<%s:%d>\n", lr->function, | |
332 | lr->start - lr->offset); | |
333 | else | |
334 | fprintf(stdout, "<%s:%d>\n", lr->file, lr->start); | |
335 | ||
336 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
337 | if (fp == NULL) { |
338 | pr_warning("Failed to open %s: %s\n", lr->path, | |
339 | strerror(errno)); | |
340 | return -errno; | |
341 | } | |
4b4da7f7 | 342 | /* Skip to starting line number */ |
146a1439 MH |
343 | while (l < lr->start && ret >= 0) |
344 | ret = show_one_line(fp, l++, true, false); | |
345 | if (ret < 0) | |
346 | goto end; | |
4b4da7f7 MH |
347 | |
348 | list_for_each_entry(ln, &lr->line_list, list) { | |
146a1439 MH |
349 | while (ln->line > l && ret >= 0) |
350 | ret = show_one_line(fp, (l++) - lr->offset, | |
351 | false, false); | |
352 | if (ret >= 0) | |
353 | ret = show_one_line(fp, (l++) - lr->offset, | |
354 | false, true); | |
355 | if (ret < 0) | |
356 | goto end; | |
4b4da7f7 MH |
357 | } |
358 | ||
359 | if (lr->end == INT_MAX) | |
360 | lr->end = l + NR_ADDITIONAL_LINES; | |
dda4ab34 | 361 | while (l <= lr->end && !feof(fp) && ret >= 0) |
146a1439 MH |
362 | ret = show_one_line(fp, (l++) - lr->offset, false, false); |
363 | end: | |
4b4da7f7 | 364 | fclose(fp); |
146a1439 | 365 | return ret; |
4b4da7f7 MH |
366 | } |
367 | ||
368 | #else /* !DWARF_SUPPORT */ | |
369 | ||
146a1439 | 370 | static int convert_to_perf_probe_point(struct kprobe_trace_point *tp, |
4b4da7f7 MH |
371 | struct perf_probe_point *pp) |
372 | { | |
02b95dad MH |
373 | pp->function = strdup(tp->symbol); |
374 | if (pp->function == NULL) | |
375 | return -ENOMEM; | |
4b4da7f7 MH |
376 | pp->offset = tp->offset; |
377 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
378 | |
379 | return 0; | |
4b4da7f7 MH |
380 | } |
381 | ||
382 | static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, | |
ef4a3565 MH |
383 | struct kprobe_trace_event **tevs __unused, |
384 | int max_tevs __unused) | |
4b4da7f7 | 385 | { |
146a1439 MH |
386 | if (perf_probe_event_need_dwarf(pev)) { |
387 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
388 | return -ENOSYS; | |
389 | } | |
4b4da7f7 MH |
390 | return 0; |
391 | } | |
392 | ||
146a1439 | 393 | int show_line_range(struct line_range *lr __unused) |
4b4da7f7 | 394 | { |
146a1439 MH |
395 | pr_warning("Debuginfo-analysis is not supported.\n"); |
396 | return -ENOSYS; | |
4b4da7f7 MH |
397 | } |
398 | ||
e0faa8d3 MH |
399 | #endif |
400 | ||
146a1439 | 401 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def MH |
402 | { |
403 | const char *ptr; | |
404 | char *tmp; | |
405 | /* | |
406 | * <Syntax> | |
407 | * SRC:SLN[+NUM|-ELN] | |
408 | * FUNC[:SLN[+NUM|-ELN]] | |
409 | */ | |
410 | ptr = strchr(arg, ':'); | |
411 | if (ptr) { | |
d3b63d7a | 412 | lr->start = (int)strtoul(ptr + 1, &tmp, 0); |
dda4ab34 | 413 | if (*tmp == '+') { |
d3b63d7a | 414 | lr->end = lr->start + (int)strtoul(tmp + 1, &tmp, 0); |
dda4ab34 MH |
415 | lr->end--; /* |
416 | * Adjust the number of lines here. | |
417 | * If the number of lines == 1, the | |
418 | * the end of line should be equal to | |
419 | * the start of line. | |
420 | */ | |
421 | } else if (*tmp == '-') | |
d3b63d7a | 422 | lr->end = (int)strtoul(tmp + 1, &tmp, 0); |
631c9def | 423 | else |
d3b63d7a MH |
424 | lr->end = INT_MAX; |
425 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); | |
426 | if (lr->start > lr->end) { | |
631c9def | 427 | semantic_error("Start line must be smaller" |
146a1439 MH |
428 | " than end line.\n"); |
429 | return -EINVAL; | |
430 | } | |
431 | if (*tmp != '\0') { | |
432 | semantic_error("Tailing with invalid character '%d'.\n", | |
631c9def | 433 | *tmp); |
146a1439 MH |
434 | return -EINVAL; |
435 | } | |
02b95dad | 436 | tmp = strndup(arg, (ptr - arg)); |
d3b63d7a | 437 | } else { |
02b95dad | 438 | tmp = strdup(arg); |
d3b63d7a MH |
439 | lr->end = INT_MAX; |
440 | } | |
02b95dad MH |
441 | |
442 | if (tmp == NULL) | |
443 | return -ENOMEM; | |
631c9def MH |
444 | |
445 | if (strchr(tmp, '.')) | |
446 | lr->file = tmp; | |
447 | else | |
448 | lr->function = tmp; | |
146a1439 MH |
449 | |
450 | return 0; | |
631c9def MH |
451 | } |
452 | ||
b7702a21 MH |
453 | /* Check the name is good for event/group */ |
454 | static bool check_event_name(const char *name) | |
455 | { | |
456 | if (!isalpha(*name) && *name != '_') | |
457 | return false; | |
458 | while (*++name != '\0') { | |
459 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
460 | return false; | |
461 | } | |
462 | return true; | |
463 | } | |
464 | ||
50656eec | 465 | /* Parse probepoint definition. */ |
146a1439 | 466 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 467 | { |
4235b045 | 468 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
469 | char *ptr, *tmp; |
470 | char c, nc = 0; | |
471 | /* | |
472 | * <Syntax> | |
2a9c8c36 MH |
473 | * perf probe [EVENT=]SRC[:LN|;PTN] |
474 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
475 | * |
476 | * TODO:Group name support | |
50656eec MH |
477 | */ |
478 | ||
2a9c8c36 MH |
479 | ptr = strpbrk(arg, ";=@+%"); |
480 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
481 | *ptr = '\0'; |
482 | tmp = ptr + 1; | |
146a1439 MH |
483 | if (strchr(arg, ':')) { |
484 | semantic_error("Group name is not supported yet.\n"); | |
485 | return -ENOTSUP; | |
486 | } | |
487 | if (!check_event_name(arg)) { | |
b7702a21 | 488 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
489 | "follow C symbol-naming rule.\n", arg); |
490 | return -EINVAL; | |
491 | } | |
02b95dad MH |
492 | pev->event = strdup(arg); |
493 | if (pev->event == NULL) | |
494 | return -ENOMEM; | |
4235b045 | 495 | pev->group = NULL; |
af663d75 MH |
496 | arg = tmp; |
497 | } | |
498 | ||
2a9c8c36 | 499 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
500 | if (ptr) { |
501 | nc = *ptr; | |
502 | *ptr++ = '\0'; | |
503 | } | |
504 | ||
02b95dad MH |
505 | tmp = strdup(arg); |
506 | if (tmp == NULL) | |
507 | return -ENOMEM; | |
508 | ||
50656eec | 509 | /* Check arg is function or file and copy it */ |
02b95dad MH |
510 | if (strchr(tmp, '.')) /* File */ |
511 | pp->file = tmp; | |
50656eec | 512 | else /* Function */ |
02b95dad | 513 | pp->function = tmp; |
50656eec MH |
514 | |
515 | /* Parse other options */ | |
516 | while (ptr) { | |
517 | arg = ptr; | |
518 | c = nc; | |
2a9c8c36 | 519 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
520 | pp->lazy_line = strdup(arg); |
521 | if (pp->lazy_line == NULL) | |
522 | return -ENOMEM; | |
2a9c8c36 MH |
523 | break; |
524 | } | |
525 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
526 | if (ptr) { |
527 | nc = *ptr; | |
528 | *ptr++ = '\0'; | |
529 | } | |
530 | switch (c) { | |
531 | case ':': /* Line number */ | |
532 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 533 | if (*tmp != '\0') { |
2a9c8c36 | 534 | semantic_error("There is non-digit char" |
146a1439 MH |
535 | " in line number.\n"); |
536 | return -EINVAL; | |
537 | } | |
50656eec MH |
538 | break; |
539 | case '+': /* Byte offset from a symbol */ | |
540 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 541 | if (*tmp != '\0') { |
2a9c8c36 | 542 | semantic_error("There is non-digit character" |
146a1439 MH |
543 | " in offset.\n"); |
544 | return -EINVAL; | |
545 | } | |
50656eec MH |
546 | break; |
547 | case '@': /* File name */ | |
146a1439 MH |
548 | if (pp->file) { |
549 | semantic_error("SRC@SRC is not allowed.\n"); | |
550 | return -EINVAL; | |
551 | } | |
02b95dad MH |
552 | pp->file = strdup(arg); |
553 | if (pp->file == NULL) | |
554 | return -ENOMEM; | |
50656eec MH |
555 | break; |
556 | case '%': /* Probe places */ | |
557 | if (strcmp(arg, "return") == 0) { | |
558 | pp->retprobe = 1; | |
146a1439 MH |
559 | } else { /* Others not supported yet */ |
560 | semantic_error("%%%s is not supported.\n", arg); | |
561 | return -ENOTSUP; | |
562 | } | |
50656eec | 563 | break; |
146a1439 MH |
564 | default: /* Buggy case */ |
565 | pr_err("This program has a bug at %s:%d.\n", | |
566 | __FILE__, __LINE__); | |
567 | return -ENOTSUP; | |
50656eec MH |
568 | break; |
569 | } | |
570 | } | |
571 | ||
572 | /* Exclusion check */ | |
146a1439 | 573 | if (pp->lazy_line && pp->line) { |
2a9c8c36 | 574 | semantic_error("Lazy pattern can't be used with line number."); |
146a1439 MH |
575 | return -EINVAL; |
576 | } | |
2a9c8c36 | 577 | |
146a1439 | 578 | if (pp->lazy_line && pp->offset) { |
2a9c8c36 | 579 | semantic_error("Lazy pattern can't be used with offset."); |
146a1439 MH |
580 | return -EINVAL; |
581 | } | |
2a9c8c36 | 582 | |
146a1439 | 583 | if (pp->line && pp->offset) { |
50656eec | 584 | semantic_error("Offset can't be used with line number."); |
146a1439 MH |
585 | return -EINVAL; |
586 | } | |
50656eec | 587 | |
146a1439 | 588 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 MH |
589 | semantic_error("File always requires line number or " |
590 | "lazy pattern."); | |
146a1439 MH |
591 | return -EINVAL; |
592 | } | |
50656eec | 593 | |
146a1439 | 594 | if (pp->offset && !pp->function) { |
50656eec | 595 | semantic_error("Offset requires an entry function."); |
146a1439 MH |
596 | return -EINVAL; |
597 | } | |
50656eec | 598 | |
146a1439 | 599 | if (pp->retprobe && !pp->function) { |
50656eec | 600 | semantic_error("Return probe requires an entry function."); |
146a1439 MH |
601 | return -EINVAL; |
602 | } | |
50656eec | 603 | |
146a1439 | 604 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 MH |
605 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
606 | "return probe."); | |
146a1439 MH |
607 | return -EINVAL; |
608 | } | |
50656eec | 609 | |
4235b045 | 610 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
611 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
612 | pp->lazy_line); | |
146a1439 | 613 | return 0; |
50656eec MH |
614 | } |
615 | ||
7df2f329 | 616 | /* Parse perf-probe event argument */ |
146a1439 | 617 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 618 | { |
b2a3c12b | 619 | char *tmp, *goodname; |
7df2f329 MH |
620 | struct perf_probe_arg_field **fieldp; |
621 | ||
622 | pr_debug("parsing arg: %s into ", str); | |
623 | ||
48481938 MH |
624 | tmp = strchr(str, '='); |
625 | if (tmp) { | |
02b95dad MH |
626 | arg->name = strndup(str, tmp - str); |
627 | if (arg->name == NULL) | |
628 | return -ENOMEM; | |
11a1ca35 | 629 | pr_debug("name:%s ", arg->name); |
48481938 MH |
630 | str = tmp + 1; |
631 | } | |
632 | ||
11a1ca35 MH |
633 | tmp = strchr(str, ':'); |
634 | if (tmp) { /* Type setting */ | |
635 | *tmp = '\0'; | |
02b95dad MH |
636 | arg->type = strdup(tmp + 1); |
637 | if (arg->type == NULL) | |
638 | return -ENOMEM; | |
11a1ca35 MH |
639 | pr_debug("type:%s ", arg->type); |
640 | } | |
641 | ||
b2a3c12b | 642 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
643 | if (!is_c_varname(str) || !tmp) { |
644 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
645 | arg->var = strdup(str); |
646 | if (arg->var == NULL) | |
647 | return -ENOMEM; | |
48481938 | 648 | pr_debug("%s\n", arg->var); |
146a1439 | 649 | return 0; |
7df2f329 MH |
650 | } |
651 | ||
b2a3c12b | 652 | /* Structure fields or array element */ |
02b95dad MH |
653 | arg->var = strndup(str, tmp - str); |
654 | if (arg->var == NULL) | |
655 | return -ENOMEM; | |
b2a3c12b | 656 | goodname = arg->var; |
48481938 | 657 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
658 | fieldp = &arg->field; |
659 | ||
660 | do { | |
e334016f MH |
661 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
662 | if (*fieldp == NULL) | |
663 | return -ENOMEM; | |
b2a3c12b MH |
664 | if (*tmp == '[') { /* Array */ |
665 | str = tmp; | |
666 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 667 | (*fieldp)->ref = true; |
b2a3c12b MH |
668 | if (*tmp != ']' || tmp == str + 1) { |
669 | semantic_error("Array index must be a" | |
670 | " number.\n"); | |
671 | return -EINVAL; | |
672 | } | |
673 | tmp++; | |
674 | if (*tmp == '\0') | |
675 | tmp = NULL; | |
676 | } else { /* Structure */ | |
677 | if (*tmp == '.') { | |
678 | str = tmp + 1; | |
679 | (*fieldp)->ref = false; | |
680 | } else if (tmp[1] == '>') { | |
681 | str = tmp + 2; | |
682 | (*fieldp)->ref = true; | |
683 | } else { | |
684 | semantic_error("Argument parse error: %s\n", | |
685 | str); | |
686 | return -EINVAL; | |
687 | } | |
688 | tmp = strpbrk(str, "-.["); | |
146a1439 | 689 | } |
7df2f329 | 690 | if (tmp) { |
02b95dad MH |
691 | (*fieldp)->name = strndup(str, tmp - str); |
692 | if ((*fieldp)->name == NULL) | |
693 | return -ENOMEM; | |
b2a3c12b MH |
694 | if (*str != '[') |
695 | goodname = (*fieldp)->name; | |
7df2f329 MH |
696 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
697 | fieldp = &(*fieldp)->next; | |
698 | } | |
699 | } while (tmp); | |
02b95dad MH |
700 | (*fieldp)->name = strdup(str); |
701 | if ((*fieldp)->name == NULL) | |
702 | return -ENOMEM; | |
b2a3c12b MH |
703 | if (*str != '[') |
704 | goodname = (*fieldp)->name; | |
7df2f329 | 705 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 706 | |
b2a3c12b | 707 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 708 | if (!arg->name) { |
b2a3c12b | 709 | arg->name = strdup(goodname); |
02b95dad MH |
710 | if (arg->name == NULL) |
711 | return -ENOMEM; | |
712 | } | |
146a1439 | 713 | return 0; |
7df2f329 MH |
714 | } |
715 | ||
4235b045 | 716 | /* Parse perf-probe event command */ |
146a1439 | 717 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 718 | { |
e1c01d61 | 719 | char **argv; |
146a1439 | 720 | int argc, i, ret = 0; |
fac13fd5 | 721 | |
4235b045 | 722 | argv = argv_split(cmd, &argc); |
146a1439 MH |
723 | if (!argv) { |
724 | pr_debug("Failed to split arguments.\n"); | |
725 | return -ENOMEM; | |
726 | } | |
727 | if (argc - 1 > MAX_PROBE_ARGS) { | |
728 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
729 | ret = -ERANGE; | |
730 | goto out; | |
731 | } | |
50656eec | 732 | /* Parse probe point */ |
146a1439 MH |
733 | ret = parse_perf_probe_point(argv[0], pev); |
734 | if (ret < 0) | |
735 | goto out; | |
50656eec | 736 | |
e1c01d61 | 737 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 738 | pev->nargs = argc - 1; |
e334016f MH |
739 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
740 | if (pev->args == NULL) { | |
741 | ret = -ENOMEM; | |
742 | goto out; | |
743 | } | |
146a1439 MH |
744 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
745 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
746 | if (ret >= 0 && | |
747 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 748 | semantic_error("You can't specify local variable for" |
146a1439 MH |
749 | " kretprobe.\n"); |
750 | ret = -EINVAL; | |
751 | } | |
e1c01d61 | 752 | } |
146a1439 | 753 | out: |
e1c01d61 | 754 | argv_free(argv); |
146a1439 MH |
755 | |
756 | return ret; | |
50656eec MH |
757 | } |
758 | ||
4235b045 MH |
759 | /* Return true if this perf_probe_event requires debuginfo */ |
760 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
761 | { | |
762 | int i; | |
763 | ||
764 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
765 | return true; | |
766 | ||
767 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 768 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
769 | return true; |
770 | ||
771 | return false; | |
772 | } | |
773 | ||
4de189fe | 774 | /* Parse kprobe_events event into struct probe_point */ |
146a1439 | 775 | int parse_kprobe_trace_command(const char *cmd, struct kprobe_trace_event *tev) |
4de189fe | 776 | { |
4235b045 | 777 | struct kprobe_trace_point *tp = &tev->point; |
4de189fe MH |
778 | char pr; |
779 | char *p; | |
780 | int ret, i, argc; | |
781 | char **argv; | |
782 | ||
4235b045 MH |
783 | pr_debug("Parsing kprobe_events: %s\n", cmd); |
784 | argv = argv_split(cmd, &argc); | |
146a1439 MH |
785 | if (!argv) { |
786 | pr_debug("Failed to split arguments.\n"); | |
787 | return -ENOMEM; | |
788 | } | |
789 | if (argc < 2) { | |
790 | semantic_error("Too few probe arguments.\n"); | |
791 | ret = -ERANGE; | |
792 | goto out; | |
793 | } | |
4de189fe MH |
794 | |
795 | /* Scan event and group name. */ | |
93aaa45a | 796 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
797 | &pr, (float *)(void *)&tev->group, |
798 | (float *)(void *)&tev->event); | |
146a1439 MH |
799 | if (ret != 3) { |
800 | semantic_error("Failed to parse event name: %s\n", argv[0]); | |
801 | ret = -EINVAL; | |
802 | goto out; | |
803 | } | |
4235b045 | 804 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 805 | |
4235b045 | 806 | tp->retprobe = (pr == 'r'); |
4de189fe MH |
807 | |
808 | /* Scan function name and offset */ | |
4235b045 MH |
809 | ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol, |
810 | &tp->offset); | |
4de189fe | 811 | if (ret == 1) |
4235b045 | 812 | tp->offset = 0; |
4de189fe | 813 | |
4235b045 | 814 | tev->nargs = argc - 2; |
e334016f MH |
815 | tev->args = zalloc(sizeof(struct kprobe_trace_arg) * tev->nargs); |
816 | if (tev->args == NULL) { | |
817 | ret = -ENOMEM; | |
818 | goto out; | |
819 | } | |
4235b045 | 820 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
821 | p = strchr(argv[i + 2], '='); |
822 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
823 | *p++ = '\0'; |
824 | else | |
825 | p = argv[i + 2]; | |
02b95dad | 826 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 827 | /* TODO: parse regs and offset */ |
02b95dad MH |
828 | tev->args[i].value = strdup(p); |
829 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
830 | ret = -ENOMEM; | |
831 | goto out; | |
832 | } | |
4de189fe | 833 | } |
146a1439 MH |
834 | ret = 0; |
835 | out: | |
4de189fe | 836 | argv_free(argv); |
146a1439 | 837 | return ret; |
4de189fe MH |
838 | } |
839 | ||
7df2f329 MH |
840 | /* Compose only probe arg */ |
841 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
842 | { | |
843 | struct perf_probe_arg_field *field = pa->field; | |
844 | int ret; | |
845 | char *tmp = buf; | |
846 | ||
48481938 MH |
847 | if (pa->name && pa->var) |
848 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
849 | else | |
850 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
851 | if (ret <= 0) |
852 | goto error; | |
853 | tmp += ret; | |
854 | len -= ret; | |
855 | ||
856 | while (field) { | |
b2a3c12b MH |
857 | if (field->name[0] == '[') |
858 | ret = e_snprintf(tmp, len, "%s", field->name); | |
859 | else | |
860 | ret = e_snprintf(tmp, len, "%s%s", | |
861 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
862 | if (ret <= 0) |
863 | goto error; | |
864 | tmp += ret; | |
865 | len -= ret; | |
866 | field = field->next; | |
867 | } | |
11a1ca35 MH |
868 | |
869 | if (pa->type) { | |
870 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
871 | if (ret <= 0) | |
872 | goto error; | |
873 | tmp += ret; | |
874 | len -= ret; | |
875 | } | |
876 | ||
7df2f329 MH |
877 | return tmp - buf; |
878 | error: | |
146a1439 MH |
879 | pr_debug("Failed to synthesize perf probe argument: %s", |
880 | strerror(-ret)); | |
881 | return ret; | |
7df2f329 MH |
882 | } |
883 | ||
4235b045 MH |
884 | /* Compose only probe point (not argument) */ |
885 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 886 | { |
fb1587d8 MH |
887 | char *buf, *tmp; |
888 | char offs[32] = "", line[32] = "", file[32] = ""; | |
889 | int ret, len; | |
4de189fe | 890 | |
e334016f MH |
891 | buf = zalloc(MAX_CMDLEN); |
892 | if (buf == NULL) { | |
893 | ret = -ENOMEM; | |
894 | goto error; | |
895 | } | |
4de189fe | 896 | if (pp->offset) { |
fb1587d8 | 897 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
898 | if (ret <= 0) |
899 | goto error; | |
900 | } | |
901 | if (pp->line) { | |
fb1587d8 MH |
902 | ret = e_snprintf(line, 32, ":%d", pp->line); |
903 | if (ret <= 0) | |
904 | goto error; | |
905 | } | |
906 | if (pp->file) { | |
dd259c5d | 907 | len = strlen(pp->file) - 31; |
fb1587d8 MH |
908 | if (len < 0) |
909 | len = 0; | |
910 | tmp = strchr(pp->file + len, '/'); | |
911 | if (!tmp) | |
dd259c5d | 912 | tmp = pp->file + len; |
fb1587d8 | 913 | ret = e_snprintf(file, 32, "@%s", tmp + 1); |
4de189fe MH |
914 | if (ret <= 0) |
915 | goto error; | |
916 | } | |
917 | ||
918 | if (pp->function) | |
fb1587d8 MH |
919 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
920 | offs, pp->retprobe ? "%return" : "", line, | |
921 | file); | |
4de189fe | 922 | else |
fb1587d8 | 923 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
924 | if (ret <= 0) |
925 | goto error; | |
926 | ||
927 | return buf; | |
7ef17aaf | 928 | error: |
146a1439 MH |
929 | pr_debug("Failed to synthesize perf probe point: %s", |
930 | strerror(-ret)); | |
e334016f MH |
931 | if (buf) |
932 | free(buf); | |
146a1439 | 933 | return NULL; |
7ef17aaf MH |
934 | } |
935 | ||
4235b045 MH |
936 | #if 0 |
937 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
938 | { |
939 | char *buf; | |
940 | int i, len, ret; | |
941 | ||
4235b045 MH |
942 | buf = synthesize_perf_probe_point(&pev->point); |
943 | if (!buf) | |
944 | return NULL; | |
4de189fe | 945 | |
4235b045 MH |
946 | len = strlen(buf); |
947 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 948 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
949 | pev->args[i].name); |
950 | if (ret <= 0) { | |
951 | free(buf); | |
952 | return NULL; | |
953 | } | |
4de189fe MH |
954 | len += ret; |
955 | } | |
4de189fe | 956 | |
4235b045 MH |
957 | return buf; |
958 | } | |
959 | #endif | |
960 | ||
961 | static int __synthesize_kprobe_trace_arg_ref(struct kprobe_trace_arg_ref *ref, | |
962 | char **buf, size_t *buflen, | |
963 | int depth) | |
964 | { | |
965 | int ret; | |
966 | if (ref->next) { | |
967 | depth = __synthesize_kprobe_trace_arg_ref(ref->next, buf, | |
968 | buflen, depth + 1); | |
969 | if (depth < 0) | |
970 | goto out; | |
971 | } | |
972 | ||
973 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
974 | if (ret < 0) | |
975 | depth = ret; | |
976 | else { | |
977 | *buf += ret; | |
978 | *buflen -= ret; | |
979 | } | |
980 | out: | |
981 | return depth; | |
4de189fe | 982 | |
4de189fe MH |
983 | } |
984 | ||
4235b045 MH |
985 | static int synthesize_kprobe_trace_arg(struct kprobe_trace_arg *arg, |
986 | char *buf, size_t buflen) | |
50656eec | 987 | { |
b7dcb857 | 988 | struct kprobe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
989 | int ret, depth = 0; |
990 | char *tmp = buf; | |
991 | ||
992 | /* Argument name or separator */ | |
993 | if (arg->name) | |
994 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
995 | else | |
996 | ret = e_snprintf(buf, buflen, " "); | |
997 | if (ret < 0) | |
998 | return ret; | |
999 | buf += ret; | |
1000 | buflen -= ret; | |
1001 | ||
b7dcb857 MH |
1002 | /* Special case: @XXX */ |
1003 | if (arg->value[0] == '@' && arg->ref) | |
1004 | ref = ref->next; | |
1005 | ||
4235b045 | 1006 | /* Dereferencing arguments */ |
b7dcb857 MH |
1007 | if (ref) { |
1008 | depth = __synthesize_kprobe_trace_arg_ref(ref, &buf, | |
4235b045 MH |
1009 | &buflen, 1); |
1010 | if (depth < 0) | |
1011 | return depth; | |
1012 | } | |
1013 | ||
1014 | /* Print argument value */ | |
b7dcb857 MH |
1015 | if (arg->value[0] == '@' && arg->ref) |
1016 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1017 | arg->ref->offset); | |
1018 | else | |
1019 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1020 | if (ret < 0) |
1021 | return ret; | |
1022 | buf += ret; | |
1023 | buflen -= ret; | |
1024 | ||
1025 | /* Closing */ | |
1026 | while (depth--) { | |
1027 | ret = e_snprintf(buf, buflen, ")"); | |
1028 | if (ret < 0) | |
1029 | return ret; | |
1030 | buf += ret; | |
1031 | buflen -= ret; | |
1032 | } | |
4984912e MH |
1033 | /* Print argument type */ |
1034 | if (arg->type) { | |
1035 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1036 | if (ret <= 0) | |
1037 | return ret; | |
1038 | buf += ret; | |
1039 | } | |
4235b045 MH |
1040 | |
1041 | return buf - tmp; | |
1042 | } | |
1043 | ||
1044 | char *synthesize_kprobe_trace_command(struct kprobe_trace_event *tev) | |
1045 | { | |
1046 | struct kprobe_trace_point *tp = &tev->point; | |
50656eec MH |
1047 | char *buf; |
1048 | int i, len, ret; | |
1049 | ||
e334016f MH |
1050 | buf = zalloc(MAX_CMDLEN); |
1051 | if (buf == NULL) | |
1052 | return NULL; | |
1053 | ||
4235b045 MH |
1054 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu", |
1055 | tp->retprobe ? 'r' : 'p', | |
1056 | tev->group, tev->event, | |
1057 | tp->symbol, tp->offset); | |
1058 | if (len <= 0) | |
50656eec | 1059 | goto error; |
50656eec | 1060 | |
4235b045 MH |
1061 | for (i = 0; i < tev->nargs; i++) { |
1062 | ret = synthesize_kprobe_trace_arg(&tev->args[i], buf + len, | |
1063 | MAX_CMDLEN - len); | |
4de189fe | 1064 | if (ret <= 0) |
50656eec MH |
1065 | goto error; |
1066 | len += ret; | |
1067 | } | |
50656eec | 1068 | |
4235b045 | 1069 | return buf; |
50656eec | 1070 | error: |
4235b045 MH |
1071 | free(buf); |
1072 | return NULL; | |
1073 | } | |
50656eec | 1074 | |
146a1439 MH |
1075 | int convert_to_perf_probe_event(struct kprobe_trace_event *tev, |
1076 | struct perf_probe_event *pev) | |
4235b045 | 1077 | { |
02b95dad | 1078 | char buf[64] = ""; |
146a1439 | 1079 | int i, ret; |
4235b045 | 1080 | |
4b4da7f7 | 1081 | /* Convert event/group name */ |
02b95dad MH |
1082 | pev->event = strdup(tev->event); |
1083 | pev->group = strdup(tev->group); | |
1084 | if (pev->event == NULL || pev->group == NULL) | |
1085 | return -ENOMEM; | |
fb1587d8 | 1086 | |
4b4da7f7 | 1087 | /* Convert trace_point to probe_point */ |
146a1439 MH |
1088 | ret = convert_to_perf_probe_point(&tev->point, &pev->point); |
1089 | if (ret < 0) | |
1090 | return ret; | |
4b4da7f7 | 1091 | |
4235b045 MH |
1092 | /* Convert trace_arg to probe_arg */ |
1093 | pev->nargs = tev->nargs; | |
e334016f MH |
1094 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1095 | if (pev->args == NULL) | |
1096 | return -ENOMEM; | |
02b95dad | 1097 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1098 | if (tev->args[i].name) |
02b95dad | 1099 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1100 | else { |
146a1439 MH |
1101 | ret = synthesize_kprobe_trace_arg(&tev->args[i], |
1102 | buf, 64); | |
02b95dad | 1103 | pev->args[i].name = strdup(buf); |
4235b045 | 1104 | } |
02b95dad MH |
1105 | if (pev->args[i].name == NULL && ret >= 0) |
1106 | ret = -ENOMEM; | |
1107 | } | |
146a1439 MH |
1108 | |
1109 | if (ret < 0) | |
1110 | clear_perf_probe_event(pev); | |
1111 | ||
1112 | return ret; | |
4235b045 MH |
1113 | } |
1114 | ||
1115 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1116 | { | |
1117 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1118 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1119 | int i; |
1120 | ||
1121 | if (pev->event) | |
1122 | free(pev->event); | |
1123 | if (pev->group) | |
1124 | free(pev->group); | |
1125 | if (pp->file) | |
1126 | free(pp->file); | |
1127 | if (pp->function) | |
1128 | free(pp->function); | |
1129 | if (pp->lazy_line) | |
1130 | free(pp->lazy_line); | |
7df2f329 | 1131 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1132 | if (pev->args[i].name) |
1133 | free(pev->args[i].name); | |
48481938 MH |
1134 | if (pev->args[i].var) |
1135 | free(pev->args[i].var); | |
11a1ca35 MH |
1136 | if (pev->args[i].type) |
1137 | free(pev->args[i].type); | |
7df2f329 MH |
1138 | field = pev->args[i].field; |
1139 | while (field) { | |
1140 | next = field->next; | |
1141 | if (field->name) | |
1142 | free(field->name); | |
1143 | free(field); | |
1144 | field = next; | |
1145 | } | |
1146 | } | |
4235b045 MH |
1147 | if (pev->args) |
1148 | free(pev->args); | |
1149 | memset(pev, 0, sizeof(*pev)); | |
1150 | } | |
1151 | ||
1152 | void clear_kprobe_trace_event(struct kprobe_trace_event *tev) | |
1153 | { | |
1154 | struct kprobe_trace_arg_ref *ref, *next; | |
1155 | int i; | |
1156 | ||
1157 | if (tev->event) | |
1158 | free(tev->event); | |
1159 | if (tev->group) | |
1160 | free(tev->group); | |
1161 | if (tev->point.symbol) | |
1162 | free(tev->point.symbol); | |
1163 | for (i = 0; i < tev->nargs; i++) { | |
1164 | if (tev->args[i].name) | |
1165 | free(tev->args[i].name); | |
1166 | if (tev->args[i].value) | |
1167 | free(tev->args[i].value); | |
4984912e MH |
1168 | if (tev->args[i].type) |
1169 | free(tev->args[i].type); | |
4235b045 MH |
1170 | ref = tev->args[i].ref; |
1171 | while (ref) { | |
1172 | next = ref->next; | |
1173 | free(ref); | |
1174 | ref = next; | |
1175 | } | |
1176 | } | |
1177 | if (tev->args) | |
1178 | free(tev->args); | |
1179 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1180 | } |
1181 | ||
f4d7da49 | 1182 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
1183 | { |
1184 | char buf[PATH_MAX]; | |
7ca5989d | 1185 | const char *__debugfs; |
4de189fe MH |
1186 | int ret; |
1187 | ||
7ca5989d MH |
1188 | __debugfs = debugfs_find_mountpoint(); |
1189 | if (__debugfs == NULL) { | |
1190 | pr_warning("Debugfs is not mounted.\n"); | |
1191 | return -ENOENT; | |
1192 | } | |
1193 | ||
1194 | ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); | |
146a1439 | 1195 | if (ret >= 0) { |
7ca5989d | 1196 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1197 | if (readwrite && !probe_event_dry_run) |
1198 | ret = open(buf, O_RDWR, O_APPEND); | |
1199 | else | |
1200 | ret = open(buf, O_RDONLY, 0); | |
1201 | } | |
f4d7da49 | 1202 | |
4de189fe MH |
1203 | if (ret < 0) { |
1204 | if (errno == ENOENT) | |
146a1439 MH |
1205 | pr_warning("kprobe_events file does not exist - please" |
1206 | " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); | |
4de189fe | 1207 | else |
146a1439 MH |
1208 | pr_warning("Failed to open kprobe_events file: %s\n", |
1209 | strerror(errno)); | |
4de189fe MH |
1210 | } |
1211 | return ret; | |
1212 | } | |
1213 | ||
1214 | /* Get raw string list of current kprobe_events */ | |
4235b045 | 1215 | static struct strlist *get_kprobe_trace_command_rawlist(int fd) |
4de189fe MH |
1216 | { |
1217 | int ret, idx; | |
1218 | FILE *fp; | |
1219 | char buf[MAX_CMDLEN]; | |
1220 | char *p; | |
1221 | struct strlist *sl; | |
1222 | ||
1223 | sl = strlist__new(true, NULL); | |
1224 | ||
1225 | fp = fdopen(dup(fd), "r"); | |
1226 | while (!feof(fp)) { | |
1227 | p = fgets(buf, MAX_CMDLEN, fp); | |
1228 | if (!p) | |
1229 | break; | |
1230 | ||
1231 | idx = strlen(p) - 1; | |
1232 | if (p[idx] == '\n') | |
1233 | p[idx] = '\0'; | |
1234 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1235 | if (ret < 0) { |
1236 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1237 | strlist__delete(sl); | |
1238 | return NULL; | |
1239 | } | |
4de189fe MH |
1240 | } |
1241 | fclose(fp); | |
1242 | ||
1243 | return sl; | |
1244 | } | |
1245 | ||
278498d4 | 1246 | /* Show an event */ |
146a1439 | 1247 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1248 | { |
7e990a51 | 1249 | int i, ret; |
278498d4 | 1250 | char buf[128]; |
4235b045 | 1251 | char *place; |
278498d4 | 1252 | |
4235b045 MH |
1253 | /* Synthesize only event probe point */ |
1254 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1255 | if (!place) |
1256 | return -EINVAL; | |
4235b045 MH |
1257 | |
1258 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1259 | if (ret < 0) |
146a1439 MH |
1260 | return ret; |
1261 | ||
fb1587d8 | 1262 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1263 | |
4235b045 | 1264 | if (pev->nargs > 0) { |
278498d4 | 1265 | printf(" with"); |
7df2f329 | 1266 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1267 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1268 | buf, 128); | |
1269 | if (ret < 0) | |
1270 | break; | |
7df2f329 MH |
1271 | printf(" %s", buf); |
1272 | } | |
278498d4 MH |
1273 | } |
1274 | printf(")\n"); | |
4235b045 | 1275 | free(place); |
146a1439 | 1276 | return ret; |
278498d4 MH |
1277 | } |
1278 | ||
4de189fe | 1279 | /* List up current perf-probe events */ |
146a1439 | 1280 | int show_perf_probe_events(void) |
4de189fe | 1281 | { |
146a1439 | 1282 | int fd, ret; |
4235b045 MH |
1283 | struct kprobe_trace_event tev; |
1284 | struct perf_probe_event pev; | |
4de189fe MH |
1285 | struct strlist *rawlist; |
1286 | struct str_node *ent; | |
1287 | ||
72041334 | 1288 | setup_pager(); |
146a1439 MH |
1289 | ret = init_vmlinux(); |
1290 | if (ret < 0) | |
1291 | return ret; | |
4235b045 MH |
1292 | |
1293 | memset(&tev, 0, sizeof(tev)); | |
1294 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1295 | |
f4d7da49 | 1296 | fd = open_kprobe_events(false); |
146a1439 MH |
1297 | if (fd < 0) |
1298 | return fd; | |
1299 | ||
4235b045 | 1300 | rawlist = get_kprobe_trace_command_rawlist(fd); |
4de189fe | 1301 | close(fd); |
146a1439 MH |
1302 | if (!rawlist) |
1303 | return -ENOENT; | |
4de189fe | 1304 | |
adf365f4 | 1305 | strlist__for_each(ent, rawlist) { |
146a1439 MH |
1306 | ret = parse_kprobe_trace_command(ent->s, &tev); |
1307 | if (ret >= 0) { | |
1308 | ret = convert_to_perf_probe_event(&tev, &pev); | |
1309 | if (ret >= 0) | |
1310 | ret = show_perf_probe_event(&pev); | |
1311 | } | |
4235b045 MH |
1312 | clear_perf_probe_event(&pev); |
1313 | clear_kprobe_trace_event(&tev); | |
146a1439 MH |
1314 | if (ret < 0) |
1315 | break; | |
4de189fe | 1316 | } |
4de189fe | 1317 | strlist__delete(rawlist); |
146a1439 MH |
1318 | |
1319 | return ret; | |
4de189fe MH |
1320 | } |
1321 | ||
b498ce1f | 1322 | /* Get current perf-probe event names */ |
4235b045 | 1323 | static struct strlist *get_kprobe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1324 | { |
fa28244d | 1325 | char buf[128]; |
b498ce1f MH |
1326 | struct strlist *sl, *rawlist; |
1327 | struct str_node *ent; | |
4235b045 | 1328 | struct kprobe_trace_event tev; |
146a1439 | 1329 | int ret = 0; |
b498ce1f | 1330 | |
4235b045 | 1331 | memset(&tev, 0, sizeof(tev)); |
b498ce1f | 1332 | |
4235b045 | 1333 | rawlist = get_kprobe_trace_command_rawlist(fd); |
e1d2017b | 1334 | sl = strlist__new(true, NULL); |
adf365f4 | 1335 | strlist__for_each(ent, rawlist) { |
146a1439 MH |
1336 | ret = parse_kprobe_trace_command(ent->s, &tev); |
1337 | if (ret < 0) | |
1338 | break; | |
fa28244d | 1339 | if (include_group) { |
146a1439 MH |
1340 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1341 | tev.event); | |
1342 | if (ret >= 0) | |
1343 | ret = strlist__add(sl, buf); | |
fa28244d | 1344 | } else |
146a1439 | 1345 | ret = strlist__add(sl, tev.event); |
4235b045 | 1346 | clear_kprobe_trace_event(&tev); |
146a1439 MH |
1347 | if (ret < 0) |
1348 | break; | |
b498ce1f | 1349 | } |
b498ce1f MH |
1350 | strlist__delete(rawlist); |
1351 | ||
146a1439 MH |
1352 | if (ret < 0) { |
1353 | strlist__delete(sl); | |
1354 | return NULL; | |
1355 | } | |
b498ce1f MH |
1356 | return sl; |
1357 | } | |
1358 | ||
146a1439 | 1359 | static int write_kprobe_trace_event(int fd, struct kprobe_trace_event *tev) |
50656eec | 1360 | { |
6eca8cc3 | 1361 | int ret = 0; |
4235b045 | 1362 | char *buf = synthesize_kprobe_trace_command(tev); |
50656eec | 1363 | |
146a1439 MH |
1364 | if (!buf) { |
1365 | pr_debug("Failed to synthesize kprobe trace event.\n"); | |
1366 | return -EINVAL; | |
1367 | } | |
1368 | ||
fa28244d | 1369 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1370 | if (!probe_event_dry_run) { |
1371 | ret = write(fd, buf, strlen(buf)); | |
1372 | if (ret <= 0) | |
146a1439 MH |
1373 | pr_warning("Failed to write event: %s\n", |
1374 | strerror(errno)); | |
f4d7da49 | 1375 | } |
4235b045 | 1376 | free(buf); |
146a1439 | 1377 | return ret; |
50656eec MH |
1378 | } |
1379 | ||
146a1439 MH |
1380 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1381 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1382 | { |
1383 | int i, ret; | |
17f88fcd MH |
1384 | |
1385 | /* Try no suffix */ | |
1386 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1387 | if (ret < 0) { |
1388 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1389 | return ret; | |
1390 | } | |
17f88fcd | 1391 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1392 | return 0; |
17f88fcd | 1393 | |
d761b08b MH |
1394 | if (!allow_suffix) { |
1395 | pr_warning("Error: event \"%s\" already exists. " | |
1396 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1397 | return -EEXIST; |
d761b08b MH |
1398 | } |
1399 | ||
17f88fcd MH |
1400 | /* Try to add suffix */ |
1401 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1402 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1403 | if (ret < 0) { |
1404 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1405 | return ret; | |
1406 | } | |
b498ce1f MH |
1407 | if (!strlist__has_entry(namelist, buf)) |
1408 | break; | |
1409 | } | |
146a1439 MH |
1410 | if (i == MAX_EVENT_INDEX) { |
1411 | pr_warning("Too many events are on the same function.\n"); | |
1412 | ret = -ERANGE; | |
1413 | } | |
1414 | ||
1415 | return ret; | |
b498ce1f MH |
1416 | } |
1417 | ||
146a1439 MH |
1418 | static int __add_kprobe_trace_events(struct perf_probe_event *pev, |
1419 | struct kprobe_trace_event *tevs, | |
1420 | int ntevs, bool allow_suffix) | |
50656eec | 1421 | { |
146a1439 | 1422 | int i, fd, ret; |
55632770 | 1423 | struct kprobe_trace_event *tev = NULL; |
4235b045 MH |
1424 | char buf[64]; |
1425 | const char *event, *group; | |
b498ce1f | 1426 | struct strlist *namelist; |
50656eec | 1427 | |
f4d7da49 | 1428 | fd = open_kprobe_events(true); |
146a1439 MH |
1429 | if (fd < 0) |
1430 | return fd; | |
b498ce1f | 1431 | /* Get current event names */ |
4235b045 | 1432 | namelist = get_kprobe_trace_event_names(fd, false); |
146a1439 MH |
1433 | if (!namelist) { |
1434 | pr_debug("Failed to get current event list.\n"); | |
1435 | return -EIO; | |
1436 | } | |
4235b045 | 1437 | |
146a1439 | 1438 | ret = 0; |
4235b045 | 1439 | printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1440 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1441 | tev = &tevs[i]; |
1442 | if (pev->event) | |
1443 | event = pev->event; | |
1444 | else | |
1445 | if (pev->point.function) | |
1446 | event = pev->point.function; | |
1447 | else | |
1448 | event = tev->point.symbol; | |
1449 | if (pev->group) | |
1450 | group = pev->group; | |
1451 | else | |
1452 | group = PERFPROBE_GROUP; | |
1453 | ||
1454 | /* Get an unused new event name */ | |
146a1439 MH |
1455 | ret = get_new_event_name(buf, 64, event, |
1456 | namelist, allow_suffix); | |
1457 | if (ret < 0) | |
1458 | break; | |
4235b045 MH |
1459 | event = buf; |
1460 | ||
02b95dad MH |
1461 | tev->event = strdup(event); |
1462 | tev->group = strdup(group); | |
1463 | if (tev->event == NULL || tev->group == NULL) { | |
1464 | ret = -ENOMEM; | |
1465 | break; | |
1466 | } | |
146a1439 MH |
1467 | ret = write_kprobe_trace_event(fd, tev); |
1468 | if (ret < 0) | |
1469 | break; | |
4235b045 MH |
1470 | /* Add added event name to namelist */ |
1471 | strlist__add(namelist, event); | |
1472 | ||
1473 | /* Trick here - save current event/group */ | |
1474 | event = pev->event; | |
1475 | group = pev->group; | |
1476 | pev->event = tev->event; | |
1477 | pev->group = tev->group; | |
1478 | show_perf_probe_event(pev); | |
1479 | /* Trick here - restore current event/group */ | |
1480 | pev->event = (char *)event; | |
1481 | pev->group = (char *)group; | |
1482 | ||
1483 | /* | |
1484 | * Probes after the first probe which comes from same | |
1485 | * user input are always allowed to add suffix, because | |
1486 | * there might be several addresses corresponding to | |
1487 | * one code line. | |
1488 | */ | |
1489 | allow_suffix = true; | |
50656eec | 1490 | } |
146a1439 MH |
1491 | |
1492 | if (ret >= 0) { | |
1493 | /* Show how to use the event. */ | |
1494 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
1495 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
1496 | tev->event); | |
1497 | } | |
a9b495b0 | 1498 | |
e1d2017b | 1499 | strlist__delete(namelist); |
50656eec | 1500 | close(fd); |
146a1439 | 1501 | return ret; |
50656eec | 1502 | } |
fa28244d | 1503 | |
4235b045 | 1504 | static int convert_to_kprobe_trace_events(struct perf_probe_event *pev, |
ef4a3565 MH |
1505 | struct kprobe_trace_event **tevs, |
1506 | int max_tevs) | |
e0faa8d3 MH |
1507 | { |
1508 | struct symbol *sym; | |
e334016f | 1509 | int ret = 0, i; |
4235b045 MH |
1510 | struct kprobe_trace_event *tev; |
1511 | ||
4b4da7f7 | 1512 | /* Convert perf_probe_event with debuginfo */ |
ef4a3565 | 1513 | ret = try_to_find_kprobe_trace_events(pev, tevs, max_tevs); |
e334016f MH |
1514 | if (ret != 0) |
1515 | return ret; | |
e0faa8d3 | 1516 | |
4235b045 | 1517 | /* Allocate trace event buffer */ |
e334016f MH |
1518 | tev = *tevs = zalloc(sizeof(struct kprobe_trace_event)); |
1519 | if (tev == NULL) | |
1520 | return -ENOMEM; | |
4235b045 MH |
1521 | |
1522 | /* Copy parameters */ | |
02b95dad MH |
1523 | tev->point.symbol = strdup(pev->point.function); |
1524 | if (tev->point.symbol == NULL) { | |
1525 | ret = -ENOMEM; | |
1526 | goto error; | |
1527 | } | |
4235b045 MH |
1528 | tev->point.offset = pev->point.offset; |
1529 | tev->nargs = pev->nargs; | |
1530 | if (tev->nargs) { | |
e334016f MH |
1531 | tev->args = zalloc(sizeof(struct kprobe_trace_arg) |
1532 | * tev->nargs); | |
1533 | if (tev->args == NULL) { | |
02b95dad MH |
1534 | ret = -ENOMEM; |
1535 | goto error; | |
e334016f | 1536 | } |
48481938 | 1537 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1538 | if (pev->args[i].name) { |
1539 | tev->args[i].name = strdup(pev->args[i].name); | |
1540 | if (tev->args[i].name == NULL) { | |
1541 | ret = -ENOMEM; | |
1542 | goto error; | |
1543 | } | |
1544 | } | |
1545 | tev->args[i].value = strdup(pev->args[i].var); | |
1546 | if (tev->args[i].value == NULL) { | |
1547 | ret = -ENOMEM; | |
1548 | goto error; | |
1549 | } | |
1550 | if (pev->args[i].type) { | |
1551 | tev->args[i].type = strdup(pev->args[i].type); | |
1552 | if (tev->args[i].type == NULL) { | |
1553 | ret = -ENOMEM; | |
1554 | goto error; | |
1555 | } | |
1556 | } | |
48481938 | 1557 | } |
4235b045 MH |
1558 | } |
1559 | ||
1560 | /* Currently just checking function name from symbol map */ | |
d28c6223 | 1561 | sym = map__find_symbol_by_name(machine.vmlinux_maps[MAP__FUNCTION], |
4235b045 | 1562 | tev->point.symbol, NULL); |
146a1439 MH |
1563 | if (!sym) { |
1564 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1565 | tev->point.symbol); | |
02b95dad MH |
1566 | ret = -ENOENT; |
1567 | goto error; | |
1568 | } | |
e334016f | 1569 | |
02b95dad MH |
1570 | return 1; |
1571 | error: | |
1572 | clear_kprobe_trace_event(tev); | |
1573 | free(tev); | |
1574 | *tevs = NULL; | |
e334016f | 1575 | return ret; |
4235b045 MH |
1576 | } |
1577 | ||
1578 | struct __event_package { | |
1579 | struct perf_probe_event *pev; | |
1580 | struct kprobe_trace_event *tevs; | |
1581 | int ntevs; | |
1582 | }; | |
1583 | ||
146a1439 | 1584 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
ef4a3565 | 1585 | bool force_add, int max_tevs) |
4235b045 | 1586 | { |
146a1439 | 1587 | int i, j, ret; |
4235b045 MH |
1588 | struct __event_package *pkgs; |
1589 | ||
e334016f MH |
1590 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
1591 | if (pkgs == NULL) | |
1592 | return -ENOMEM; | |
4235b045 MH |
1593 | |
1594 | /* Init vmlinux path */ | |
146a1439 MH |
1595 | ret = init_vmlinux(); |
1596 | if (ret < 0) | |
1597 | return ret; | |
4235b045 MH |
1598 | |
1599 | /* Loop 1: convert all events */ | |
1600 | for (i = 0; i < npevs; i++) { | |
1601 | pkgs[i].pev = &pevs[i]; | |
1602 | /* Convert with or without debuginfo */ | |
146a1439 | 1603 | ret = convert_to_kprobe_trace_events(pkgs[i].pev, |
ef4a3565 | 1604 | &pkgs[i].tevs, max_tevs); |
146a1439 MH |
1605 | if (ret < 0) |
1606 | goto end; | |
1607 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
1608 | } |
1609 | ||
4235b045 | 1610 | /* Loop 2: add all events */ |
146a1439 MH |
1611 | for (i = 0; i < npevs && ret >= 0; i++) |
1612 | ret = __add_kprobe_trace_events(pkgs[i].pev, pkgs[i].tevs, | |
1613 | pkgs[i].ntevs, force_add); | |
1614 | end: | |
1615 | /* Loop 3: cleanup trace events */ | |
4235b045 | 1616 | for (i = 0; i < npevs; i++) |
146a1439 MH |
1617 | for (j = 0; j < pkgs[i].ntevs; j++) |
1618 | clear_kprobe_trace_event(&pkgs[i].tevs[j]); | |
1619 | ||
1620 | return ret; | |
e0faa8d3 MH |
1621 | } |
1622 | ||
146a1439 | 1623 | static int __del_trace_kprobe_event(int fd, struct str_node *ent) |
bbbb521b MH |
1624 | { |
1625 | char *p; | |
1626 | char buf[128]; | |
4235b045 | 1627 | int ret; |
bbbb521b MH |
1628 | |
1629 | /* Convert from perf-probe event to trace-kprobe event */ | |
146a1439 MH |
1630 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
1631 | if (ret < 0) | |
1632 | goto error; | |
1633 | ||
bbbb521b | 1634 | p = strchr(buf + 2, ':'); |
146a1439 MH |
1635 | if (!p) { |
1636 | pr_debug("Internal error: %s should have ':' but not.\n", | |
1637 | ent->s); | |
1638 | ret = -ENOTSUP; | |
1639 | goto error; | |
1640 | } | |
bbbb521b MH |
1641 | *p = '/'; |
1642 | ||
4235b045 MH |
1643 | pr_debug("Writing event: %s\n", buf); |
1644 | ret = write(fd, buf, strlen(buf)); | |
146a1439 MH |
1645 | if (ret < 0) |
1646 | goto error; | |
1647 | ||
bbbb521b | 1648 | printf("Remove event: %s\n", ent->s); |
146a1439 MH |
1649 | return 0; |
1650 | error: | |
1651 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
1652 | return ret; | |
bbbb521b MH |
1653 | } |
1654 | ||
146a1439 MH |
1655 | static int del_trace_kprobe_event(int fd, const char *group, |
1656 | const char *event, struct strlist *namelist) | |
fa28244d MH |
1657 | { |
1658 | char buf[128]; | |
bbbb521b | 1659 | struct str_node *ent, *n; |
146a1439 | 1660 | int found = 0, ret = 0; |
fa28244d | 1661 | |
146a1439 MH |
1662 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
1663 | if (ret < 0) { | |
1664 | pr_err("Failed to copy event."); | |
1665 | return ret; | |
1666 | } | |
fa28244d | 1667 | |
bbbb521b MH |
1668 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
1669 | strlist__for_each_safe(ent, n, namelist) | |
1670 | if (strglobmatch(ent->s, buf)) { | |
1671 | found++; | |
146a1439 MH |
1672 | ret = __del_trace_kprobe_event(fd, ent); |
1673 | if (ret < 0) | |
1674 | break; | |
bbbb521b MH |
1675 | strlist__remove(namelist, ent); |
1676 | } | |
1677 | } else { | |
1678 | ent = strlist__find(namelist, buf); | |
1679 | if (ent) { | |
1680 | found++; | |
146a1439 MH |
1681 | ret = __del_trace_kprobe_event(fd, ent); |
1682 | if (ret >= 0) | |
1683 | strlist__remove(namelist, ent); | |
bbbb521b MH |
1684 | } |
1685 | } | |
146a1439 MH |
1686 | if (found == 0 && ret >= 0) |
1687 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
1688 | ||
1689 | return ret; | |
fa28244d MH |
1690 | } |
1691 | ||
146a1439 | 1692 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 1693 | { |
146a1439 | 1694 | int fd, ret = 0; |
fa28244d MH |
1695 | const char *group, *event; |
1696 | char *p, *str; | |
1697 | struct str_node *ent; | |
1698 | struct strlist *namelist; | |
1699 | ||
f4d7da49 | 1700 | fd = open_kprobe_events(true); |
146a1439 MH |
1701 | if (fd < 0) |
1702 | return fd; | |
1703 | ||
fa28244d | 1704 | /* Get current event names */ |
4235b045 | 1705 | namelist = get_kprobe_trace_event_names(fd, true); |
146a1439 MH |
1706 | if (namelist == NULL) |
1707 | return -EINVAL; | |
fa28244d | 1708 | |
adf365f4 | 1709 | strlist__for_each(ent, dellist) { |
02b95dad MH |
1710 | str = strdup(ent->s); |
1711 | if (str == NULL) { | |
1712 | ret = -ENOMEM; | |
1713 | break; | |
1714 | } | |
bbbb521b | 1715 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
1716 | p = strchr(str, ':'); |
1717 | if (p) { | |
1718 | group = str; | |
1719 | *p = '\0'; | |
1720 | event = p + 1; | |
1721 | } else { | |
bbbb521b | 1722 | group = "*"; |
fa28244d MH |
1723 | event = str; |
1724 | } | |
bbbb521b | 1725 | pr_debug("Group: %s, Event: %s\n", group, event); |
146a1439 | 1726 | ret = del_trace_kprobe_event(fd, group, event, namelist); |
fa28244d | 1727 | free(str); |
146a1439 MH |
1728 | if (ret < 0) |
1729 | break; | |
fa28244d MH |
1730 | } |
1731 | strlist__delete(namelist); | |
1732 | close(fd); | |
146a1439 MH |
1733 | |
1734 | return ret; | |
fa28244d MH |
1735 | } |
1736 |