Commit | Line | Data |
---|---|---|
50656eec | 1 | /* |
0e60836b | 2 | * probe-event.c : perf-probe definition to probe_events format converter |
50656eec MH |
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 | |
0e60836b SD |
123 | /* |
124 | * Convert trace point to probe point with debuginfo | |
125 | * Currently only handles kprobes. | |
126 | */ | |
127 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, | |
146a1439 | 128 | struct perf_probe_point *pp) |
4b4da7f7 MH |
129 | { |
130 | struct symbol *sym; | |
146a1439 | 131 | int fd, ret = -ENOENT; |
4b4da7f7 | 132 | |
d28c6223 | 133 | sym = map__find_symbol_by_name(machine.vmlinux_maps[MAP__FUNCTION], |
4b4da7f7 MH |
134 | tp->symbol, NULL); |
135 | if (sym) { | |
136 | fd = open_vmlinux(); | |
146a1439 MH |
137 | if (fd >= 0) { |
138 | ret = find_perf_probe_point(fd, | |
139 | sym->start + tp->offset, pp); | |
140 | close(fd); | |
141 | } | |
4b4da7f7 MH |
142 | } |
143 | if (ret <= 0) { | |
146a1439 MH |
144 | pr_debug("Failed to find corresponding probes from " |
145 | "debuginfo. Use kprobe event information.\n"); | |
02b95dad MH |
146 | pp->function = strdup(tp->symbol); |
147 | if (pp->function == NULL) | |
148 | return -ENOMEM; | |
4b4da7f7 MH |
149 | pp->offset = tp->offset; |
150 | } | |
151 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
152 | |
153 | return 0; | |
4b4da7f7 MH |
154 | } |
155 | ||
156 | /* Try to find perf_probe_event with debuginfo */ | |
0e60836b SD |
157 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
158 | struct probe_trace_event **tevs, | |
ef4a3565 | 159 | int max_tevs) |
4b4da7f7 MH |
160 | { |
161 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
162 | int fd, ntevs; | |
163 | ||
164 | fd = open_vmlinux(); | |
165 | if (fd < 0) { | |
146a1439 MH |
166 | if (need_dwarf) { |
167 | pr_warning("Failed to open debuginfo file.\n"); | |
168 | return fd; | |
169 | } | |
4b4da7f7 MH |
170 | pr_debug("Could not open vmlinux. Try to use symbols.\n"); |
171 | return 0; | |
172 | } | |
173 | ||
174 | /* Searching trace events corresponding to probe event */ | |
0e60836b | 175 | ntevs = find_probe_trace_events(fd, pev, tevs, max_tevs); |
4b4da7f7 MH |
176 | close(fd); |
177 | ||
146a1439 | 178 | if (ntevs > 0) { /* Succeeded to find trace events */ |
0e60836b | 179 | pr_debug("find %d probe_trace_events.\n", ntevs); |
4b4da7f7 | 180 | return ntevs; |
146a1439 | 181 | } |
4b4da7f7 | 182 | |
146a1439 MH |
183 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
184 | pr_warning("Probe point '%s' not found.\n", | |
185 | synthesize_perf_probe_point(&pev->point)); | |
186 | return -ENOENT; | |
187 | } | |
188 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
189 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
190 | if (ntevs == -EBADF) { | |
191 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
192 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
193 | if (!need_dwarf) { | |
194 | pr_debug("Trying to use symbols.\nn"); | |
195 | return 0; | |
196 | } | |
4b4da7f7 | 197 | } |
15eca306 | 198 | return ntevs; |
4b4da7f7 MH |
199 | } |
200 | ||
7cf0b79e MH |
201 | /* |
202 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
203 | * and chop off leading directories that do not exist. Result is passed back as | |
204 | * a newly allocated path on success. | |
205 | * Return 0 if file was found and readable, -errno otherwise. | |
206 | */ | |
6a330a3c MH |
207 | static int get_real_path(const char *raw_path, const char *comp_dir, |
208 | char **new_path) | |
7cf0b79e | 209 | { |
6a330a3c MH |
210 | const char *prefix = symbol_conf.source_prefix; |
211 | ||
212 | if (!prefix) { | |
213 | if (raw_path[0] != '/' && comp_dir) | |
214 | /* If not an absolute path, try to use comp_dir */ | |
215 | prefix = comp_dir; | |
216 | else { | |
217 | if (access(raw_path, R_OK) == 0) { | |
218 | *new_path = strdup(raw_path); | |
219 | return 0; | |
220 | } else | |
221 | return -errno; | |
222 | } | |
7cf0b79e MH |
223 | } |
224 | ||
6a330a3c | 225 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
7cf0b79e MH |
226 | if (!*new_path) |
227 | return -ENOMEM; | |
228 | ||
229 | for (;;) { | |
6a330a3c | 230 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
7cf0b79e MH |
231 | |
232 | if (access(*new_path, R_OK) == 0) | |
233 | return 0; | |
234 | ||
6a330a3c MH |
235 | if (!symbol_conf.source_prefix) |
236 | /* In case of searching comp_dir, don't retry */ | |
237 | return -errno; | |
238 | ||
7cf0b79e MH |
239 | switch (errno) { |
240 | case ENAMETOOLONG: | |
241 | case ENOENT: | |
242 | case EROFS: | |
243 | case EFAULT: | |
244 | raw_path = strchr(++raw_path, '/'); | |
245 | if (!raw_path) { | |
246 | free(*new_path); | |
247 | *new_path = NULL; | |
248 | return -ENOENT; | |
249 | } | |
250 | continue; | |
251 | ||
252 | default: | |
253 | free(*new_path); | |
254 | *new_path = NULL; | |
255 | return -errno; | |
256 | } | |
257 | } | |
258 | } | |
259 | ||
4b4da7f7 MH |
260 | #define LINEBUF_SIZE 256 |
261 | #define NR_ADDITIONAL_LINES 2 | |
262 | ||
d3b63d7a | 263 | static int show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
264 | { |
265 | char buf[LINEBUF_SIZE]; | |
266 | const char *color = PERF_COLOR_BLUE; | |
267 | ||
268 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
269 | goto error; | |
270 | if (!skip) { | |
271 | if (show_num) | |
d3b63d7a | 272 | fprintf(stdout, "%7d %s", l, buf); |
4b4da7f7 MH |
273 | else |
274 | color_fprintf(stdout, color, " %s", buf); | |
275 | } | |
276 | ||
277 | while (strlen(buf) == LINEBUF_SIZE - 1 && | |
278 | buf[LINEBUF_SIZE - 2] != '\n') { | |
279 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
280 | goto error; | |
281 | if (!skip) { | |
282 | if (show_num) | |
283 | fprintf(stdout, "%s", buf); | |
284 | else | |
285 | color_fprintf(stdout, color, "%s", buf); | |
286 | } | |
287 | } | |
146a1439 MH |
288 | |
289 | return 0; | |
4b4da7f7 MH |
290 | error: |
291 | if (feof(fp)) | |
146a1439 | 292 | pr_warning("Source file is shorter than expected.\n"); |
4b4da7f7 | 293 | else |
146a1439 MH |
294 | pr_warning("File read error: %s\n", strerror(errno)); |
295 | ||
296 | return -1; | |
4b4da7f7 MH |
297 | } |
298 | ||
299 | /* | |
300 | * Show line-range always requires debuginfo to find source file and | |
301 | * line number. | |
302 | */ | |
146a1439 | 303 | int show_line_range(struct line_range *lr) |
4b4da7f7 | 304 | { |
d3b63d7a | 305 | int l = 1; |
4b4da7f7 MH |
306 | struct line_node *ln; |
307 | FILE *fp; | |
308 | int fd, ret; | |
7cf0b79e | 309 | char *tmp; |
4b4da7f7 MH |
310 | |
311 | /* Search a line range */ | |
146a1439 MH |
312 | ret = init_vmlinux(); |
313 | if (ret < 0) | |
314 | return ret; | |
315 | ||
4b4da7f7 | 316 | fd = open_vmlinux(); |
146a1439 MH |
317 | if (fd < 0) { |
318 | pr_warning("Failed to open debuginfo file.\n"); | |
319 | return fd; | |
320 | } | |
321 | ||
4b4da7f7 | 322 | ret = find_line_range(fd, lr); |
4b4da7f7 | 323 | close(fd); |
146a1439 MH |
324 | if (ret == 0) { |
325 | pr_warning("Specified source line is not found.\n"); | |
326 | return -ENOENT; | |
327 | } else if (ret < 0) { | |
328 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
329 | return ret; | |
330 | } | |
4b4da7f7 | 331 | |
7cf0b79e MH |
332 | /* Convert source file path */ |
333 | tmp = lr->path; | |
6a330a3c | 334 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
7cf0b79e MH |
335 | free(tmp); /* Free old path */ |
336 | if (ret < 0) { | |
337 | pr_warning("Failed to find source file. (%d)\n", ret); | |
338 | return ret; | |
339 | } | |
340 | ||
4b4da7f7 MH |
341 | setup_pager(); |
342 | ||
343 | if (lr->function) | |
344 | fprintf(stdout, "<%s:%d>\n", lr->function, | |
345 | lr->start - lr->offset); | |
346 | else | |
347 | fprintf(stdout, "<%s:%d>\n", lr->file, lr->start); | |
348 | ||
349 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
350 | if (fp == NULL) { |
351 | pr_warning("Failed to open %s: %s\n", lr->path, | |
352 | strerror(errno)); | |
353 | return -errno; | |
354 | } | |
4b4da7f7 | 355 | /* Skip to starting line number */ |
146a1439 MH |
356 | while (l < lr->start && ret >= 0) |
357 | ret = show_one_line(fp, l++, true, false); | |
358 | if (ret < 0) | |
359 | goto end; | |
4b4da7f7 MH |
360 | |
361 | list_for_each_entry(ln, &lr->line_list, list) { | |
146a1439 MH |
362 | while (ln->line > l && ret >= 0) |
363 | ret = show_one_line(fp, (l++) - lr->offset, | |
364 | false, false); | |
365 | if (ret >= 0) | |
366 | ret = show_one_line(fp, (l++) - lr->offset, | |
367 | false, true); | |
368 | if (ret < 0) | |
369 | goto end; | |
4b4da7f7 MH |
370 | } |
371 | ||
372 | if (lr->end == INT_MAX) | |
373 | lr->end = l + NR_ADDITIONAL_LINES; | |
dda4ab34 | 374 | while (l <= lr->end && !feof(fp) && ret >= 0) |
146a1439 MH |
375 | ret = show_one_line(fp, (l++) - lr->offset, false, false); |
376 | end: | |
4b4da7f7 | 377 | fclose(fp); |
146a1439 | 378 | return ret; |
4b4da7f7 MH |
379 | } |
380 | ||
381 | #else /* !DWARF_SUPPORT */ | |
382 | ||
0e60836b SD |
383 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, |
384 | struct perf_probe_point *pp) | |
4b4da7f7 | 385 | { |
02b95dad MH |
386 | pp->function = strdup(tp->symbol); |
387 | if (pp->function == NULL) | |
388 | return -ENOMEM; | |
4b4da7f7 MH |
389 | pp->offset = tp->offset; |
390 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
391 | |
392 | return 0; | |
4b4da7f7 MH |
393 | } |
394 | ||
0e60836b SD |
395 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
396 | struct probe_trace_event **tevs __unused, | |
ef4a3565 | 397 | int max_tevs __unused) |
4b4da7f7 | 398 | { |
146a1439 MH |
399 | if (perf_probe_event_need_dwarf(pev)) { |
400 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
401 | return -ENOSYS; | |
402 | } | |
4b4da7f7 MH |
403 | return 0; |
404 | } | |
405 | ||
146a1439 | 406 | int show_line_range(struct line_range *lr __unused) |
4b4da7f7 | 407 | { |
146a1439 MH |
408 | pr_warning("Debuginfo-analysis is not supported.\n"); |
409 | return -ENOSYS; | |
4b4da7f7 MH |
410 | } |
411 | ||
e0faa8d3 MH |
412 | #endif |
413 | ||
146a1439 | 414 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def MH |
415 | { |
416 | const char *ptr; | |
417 | char *tmp; | |
418 | /* | |
419 | * <Syntax> | |
420 | * SRC:SLN[+NUM|-ELN] | |
421 | * FUNC[:SLN[+NUM|-ELN]] | |
422 | */ | |
423 | ptr = strchr(arg, ':'); | |
424 | if (ptr) { | |
d3b63d7a | 425 | lr->start = (int)strtoul(ptr + 1, &tmp, 0); |
dda4ab34 | 426 | if (*tmp == '+') { |
d3b63d7a | 427 | lr->end = lr->start + (int)strtoul(tmp + 1, &tmp, 0); |
dda4ab34 MH |
428 | lr->end--; /* |
429 | * Adjust the number of lines here. | |
430 | * If the number of lines == 1, the | |
431 | * the end of line should be equal to | |
432 | * the start of line. | |
433 | */ | |
434 | } else if (*tmp == '-') | |
d3b63d7a | 435 | lr->end = (int)strtoul(tmp + 1, &tmp, 0); |
631c9def | 436 | else |
d3b63d7a MH |
437 | lr->end = INT_MAX; |
438 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); | |
439 | if (lr->start > lr->end) { | |
631c9def | 440 | semantic_error("Start line must be smaller" |
146a1439 MH |
441 | " than end line.\n"); |
442 | return -EINVAL; | |
443 | } | |
444 | if (*tmp != '\0') { | |
445 | semantic_error("Tailing with invalid character '%d'.\n", | |
631c9def | 446 | *tmp); |
146a1439 MH |
447 | return -EINVAL; |
448 | } | |
02b95dad | 449 | tmp = strndup(arg, (ptr - arg)); |
d3b63d7a | 450 | } else { |
02b95dad | 451 | tmp = strdup(arg); |
d3b63d7a MH |
452 | lr->end = INT_MAX; |
453 | } | |
02b95dad MH |
454 | |
455 | if (tmp == NULL) | |
456 | return -ENOMEM; | |
631c9def MH |
457 | |
458 | if (strchr(tmp, '.')) | |
459 | lr->file = tmp; | |
460 | else | |
461 | lr->function = tmp; | |
146a1439 MH |
462 | |
463 | return 0; | |
631c9def MH |
464 | } |
465 | ||
b7702a21 MH |
466 | /* Check the name is good for event/group */ |
467 | static bool check_event_name(const char *name) | |
468 | { | |
469 | if (!isalpha(*name) && *name != '_') | |
470 | return false; | |
471 | while (*++name != '\0') { | |
472 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
473 | return false; | |
474 | } | |
475 | return true; | |
476 | } | |
477 | ||
50656eec | 478 | /* Parse probepoint definition. */ |
146a1439 | 479 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 480 | { |
4235b045 | 481 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
482 | char *ptr, *tmp; |
483 | char c, nc = 0; | |
484 | /* | |
485 | * <Syntax> | |
2a9c8c36 MH |
486 | * perf probe [EVENT=]SRC[:LN|;PTN] |
487 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
488 | * |
489 | * TODO:Group name support | |
50656eec MH |
490 | */ |
491 | ||
2a9c8c36 MH |
492 | ptr = strpbrk(arg, ";=@+%"); |
493 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
494 | *ptr = '\0'; |
495 | tmp = ptr + 1; | |
146a1439 MH |
496 | if (strchr(arg, ':')) { |
497 | semantic_error("Group name is not supported yet.\n"); | |
498 | return -ENOTSUP; | |
499 | } | |
500 | if (!check_event_name(arg)) { | |
b7702a21 | 501 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
502 | "follow C symbol-naming rule.\n", arg); |
503 | return -EINVAL; | |
504 | } | |
02b95dad MH |
505 | pev->event = strdup(arg); |
506 | if (pev->event == NULL) | |
507 | return -ENOMEM; | |
4235b045 | 508 | pev->group = NULL; |
af663d75 MH |
509 | arg = tmp; |
510 | } | |
511 | ||
2a9c8c36 | 512 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
513 | if (ptr) { |
514 | nc = *ptr; | |
515 | *ptr++ = '\0'; | |
516 | } | |
517 | ||
02b95dad MH |
518 | tmp = strdup(arg); |
519 | if (tmp == NULL) | |
520 | return -ENOMEM; | |
521 | ||
50656eec | 522 | /* Check arg is function or file and copy it */ |
02b95dad MH |
523 | if (strchr(tmp, '.')) /* File */ |
524 | pp->file = tmp; | |
50656eec | 525 | else /* Function */ |
02b95dad | 526 | pp->function = tmp; |
50656eec MH |
527 | |
528 | /* Parse other options */ | |
529 | while (ptr) { | |
530 | arg = ptr; | |
531 | c = nc; | |
2a9c8c36 | 532 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
533 | pp->lazy_line = strdup(arg); |
534 | if (pp->lazy_line == NULL) | |
535 | return -ENOMEM; | |
2a9c8c36 MH |
536 | break; |
537 | } | |
538 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
539 | if (ptr) { |
540 | nc = *ptr; | |
541 | *ptr++ = '\0'; | |
542 | } | |
543 | switch (c) { | |
544 | case ':': /* Line number */ | |
545 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 546 | if (*tmp != '\0') { |
2a9c8c36 | 547 | semantic_error("There is non-digit char" |
146a1439 MH |
548 | " in line number.\n"); |
549 | return -EINVAL; | |
550 | } | |
50656eec MH |
551 | break; |
552 | case '+': /* Byte offset from a symbol */ | |
553 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 554 | if (*tmp != '\0') { |
2a9c8c36 | 555 | semantic_error("There is non-digit character" |
146a1439 MH |
556 | " in offset.\n"); |
557 | return -EINVAL; | |
558 | } | |
50656eec MH |
559 | break; |
560 | case '@': /* File name */ | |
146a1439 MH |
561 | if (pp->file) { |
562 | semantic_error("SRC@SRC is not allowed.\n"); | |
563 | return -EINVAL; | |
564 | } | |
02b95dad MH |
565 | pp->file = strdup(arg); |
566 | if (pp->file == NULL) | |
567 | return -ENOMEM; | |
50656eec MH |
568 | break; |
569 | case '%': /* Probe places */ | |
570 | if (strcmp(arg, "return") == 0) { | |
571 | pp->retprobe = 1; | |
146a1439 MH |
572 | } else { /* Others not supported yet */ |
573 | semantic_error("%%%s is not supported.\n", arg); | |
574 | return -ENOTSUP; | |
575 | } | |
50656eec | 576 | break; |
146a1439 MH |
577 | default: /* Buggy case */ |
578 | pr_err("This program has a bug at %s:%d.\n", | |
579 | __FILE__, __LINE__); | |
580 | return -ENOTSUP; | |
50656eec MH |
581 | break; |
582 | } | |
583 | } | |
584 | ||
585 | /* Exclusion check */ | |
146a1439 | 586 | if (pp->lazy_line && pp->line) { |
2a9c8c36 | 587 | semantic_error("Lazy pattern can't be used with line number."); |
146a1439 MH |
588 | return -EINVAL; |
589 | } | |
2a9c8c36 | 590 | |
146a1439 | 591 | if (pp->lazy_line && pp->offset) { |
2a9c8c36 | 592 | semantic_error("Lazy pattern can't be used with offset."); |
146a1439 MH |
593 | return -EINVAL; |
594 | } | |
2a9c8c36 | 595 | |
146a1439 | 596 | if (pp->line && pp->offset) { |
50656eec | 597 | semantic_error("Offset can't be used with line number."); |
146a1439 MH |
598 | return -EINVAL; |
599 | } | |
50656eec | 600 | |
146a1439 | 601 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 MH |
602 | semantic_error("File always requires line number or " |
603 | "lazy pattern."); | |
146a1439 MH |
604 | return -EINVAL; |
605 | } | |
50656eec | 606 | |
146a1439 | 607 | if (pp->offset && !pp->function) { |
50656eec | 608 | semantic_error("Offset requires an entry function."); |
146a1439 MH |
609 | return -EINVAL; |
610 | } | |
50656eec | 611 | |
146a1439 | 612 | if (pp->retprobe && !pp->function) { |
50656eec | 613 | semantic_error("Return probe requires an entry function."); |
146a1439 MH |
614 | return -EINVAL; |
615 | } | |
50656eec | 616 | |
146a1439 | 617 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 MH |
618 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
619 | "return probe."); | |
146a1439 MH |
620 | return -EINVAL; |
621 | } | |
50656eec | 622 | |
4235b045 | 623 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
624 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
625 | pp->lazy_line); | |
146a1439 | 626 | return 0; |
50656eec MH |
627 | } |
628 | ||
7df2f329 | 629 | /* Parse perf-probe event argument */ |
146a1439 | 630 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 631 | { |
b2a3c12b | 632 | char *tmp, *goodname; |
7df2f329 MH |
633 | struct perf_probe_arg_field **fieldp; |
634 | ||
635 | pr_debug("parsing arg: %s into ", str); | |
636 | ||
48481938 MH |
637 | tmp = strchr(str, '='); |
638 | if (tmp) { | |
02b95dad MH |
639 | arg->name = strndup(str, tmp - str); |
640 | if (arg->name == NULL) | |
641 | return -ENOMEM; | |
11a1ca35 | 642 | pr_debug("name:%s ", arg->name); |
48481938 MH |
643 | str = tmp + 1; |
644 | } | |
645 | ||
11a1ca35 MH |
646 | tmp = strchr(str, ':'); |
647 | if (tmp) { /* Type setting */ | |
648 | *tmp = '\0'; | |
02b95dad MH |
649 | arg->type = strdup(tmp + 1); |
650 | if (arg->type == NULL) | |
651 | return -ENOMEM; | |
11a1ca35 MH |
652 | pr_debug("type:%s ", arg->type); |
653 | } | |
654 | ||
b2a3c12b | 655 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
656 | if (!is_c_varname(str) || !tmp) { |
657 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
658 | arg->var = strdup(str); |
659 | if (arg->var == NULL) | |
660 | return -ENOMEM; | |
48481938 | 661 | pr_debug("%s\n", arg->var); |
146a1439 | 662 | return 0; |
7df2f329 MH |
663 | } |
664 | ||
b2a3c12b | 665 | /* Structure fields or array element */ |
02b95dad MH |
666 | arg->var = strndup(str, tmp - str); |
667 | if (arg->var == NULL) | |
668 | return -ENOMEM; | |
b2a3c12b | 669 | goodname = arg->var; |
48481938 | 670 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
671 | fieldp = &arg->field; |
672 | ||
673 | do { | |
e334016f MH |
674 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
675 | if (*fieldp == NULL) | |
676 | return -ENOMEM; | |
b2a3c12b MH |
677 | if (*tmp == '[') { /* Array */ |
678 | str = tmp; | |
679 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 680 | (*fieldp)->ref = true; |
b2a3c12b MH |
681 | if (*tmp != ']' || tmp == str + 1) { |
682 | semantic_error("Array index must be a" | |
683 | " number.\n"); | |
684 | return -EINVAL; | |
685 | } | |
686 | tmp++; | |
687 | if (*tmp == '\0') | |
688 | tmp = NULL; | |
689 | } else { /* Structure */ | |
690 | if (*tmp == '.') { | |
691 | str = tmp + 1; | |
692 | (*fieldp)->ref = false; | |
693 | } else if (tmp[1] == '>') { | |
694 | str = tmp + 2; | |
695 | (*fieldp)->ref = true; | |
696 | } else { | |
697 | semantic_error("Argument parse error: %s\n", | |
698 | str); | |
699 | return -EINVAL; | |
700 | } | |
701 | tmp = strpbrk(str, "-.["); | |
146a1439 | 702 | } |
7df2f329 | 703 | if (tmp) { |
02b95dad MH |
704 | (*fieldp)->name = strndup(str, tmp - str); |
705 | if ((*fieldp)->name == NULL) | |
706 | return -ENOMEM; | |
b2a3c12b MH |
707 | if (*str != '[') |
708 | goodname = (*fieldp)->name; | |
7df2f329 MH |
709 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
710 | fieldp = &(*fieldp)->next; | |
711 | } | |
712 | } while (tmp); | |
02b95dad MH |
713 | (*fieldp)->name = strdup(str); |
714 | if ((*fieldp)->name == NULL) | |
715 | return -ENOMEM; | |
b2a3c12b MH |
716 | if (*str != '[') |
717 | goodname = (*fieldp)->name; | |
7df2f329 | 718 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 719 | |
b2a3c12b | 720 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 721 | if (!arg->name) { |
b2a3c12b | 722 | arg->name = strdup(goodname); |
02b95dad MH |
723 | if (arg->name == NULL) |
724 | return -ENOMEM; | |
725 | } | |
146a1439 | 726 | return 0; |
7df2f329 MH |
727 | } |
728 | ||
4235b045 | 729 | /* Parse perf-probe event command */ |
146a1439 | 730 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 731 | { |
e1c01d61 | 732 | char **argv; |
146a1439 | 733 | int argc, i, ret = 0; |
fac13fd5 | 734 | |
4235b045 | 735 | argv = argv_split(cmd, &argc); |
146a1439 MH |
736 | if (!argv) { |
737 | pr_debug("Failed to split arguments.\n"); | |
738 | return -ENOMEM; | |
739 | } | |
740 | if (argc - 1 > MAX_PROBE_ARGS) { | |
741 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
742 | ret = -ERANGE; | |
743 | goto out; | |
744 | } | |
50656eec | 745 | /* Parse probe point */ |
146a1439 MH |
746 | ret = parse_perf_probe_point(argv[0], pev); |
747 | if (ret < 0) | |
748 | goto out; | |
50656eec | 749 | |
e1c01d61 | 750 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 751 | pev->nargs = argc - 1; |
e334016f MH |
752 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
753 | if (pev->args == NULL) { | |
754 | ret = -ENOMEM; | |
755 | goto out; | |
756 | } | |
146a1439 MH |
757 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
758 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
759 | if (ret >= 0 && | |
760 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 761 | semantic_error("You can't specify local variable for" |
146a1439 MH |
762 | " kretprobe.\n"); |
763 | ret = -EINVAL; | |
764 | } | |
e1c01d61 | 765 | } |
146a1439 | 766 | out: |
e1c01d61 | 767 | argv_free(argv); |
146a1439 MH |
768 | |
769 | return ret; | |
50656eec MH |
770 | } |
771 | ||
4235b045 MH |
772 | /* Return true if this perf_probe_event requires debuginfo */ |
773 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
774 | { | |
775 | int i; | |
776 | ||
777 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
778 | return true; | |
779 | ||
780 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 781 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
782 | return true; |
783 | ||
784 | return false; | |
785 | } | |
786 | ||
0e60836b SD |
787 | /* Parse probe_events event into struct probe_point */ |
788 | static int parse_probe_trace_command(const char *cmd, | |
789 | struct probe_trace_event *tev) | |
4de189fe | 790 | { |
0e60836b | 791 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
792 | char pr; |
793 | char *p; | |
794 | int ret, i, argc; | |
795 | char **argv; | |
796 | ||
0e60836b | 797 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 798 | argv = argv_split(cmd, &argc); |
146a1439 MH |
799 | if (!argv) { |
800 | pr_debug("Failed to split arguments.\n"); | |
801 | return -ENOMEM; | |
802 | } | |
803 | if (argc < 2) { | |
804 | semantic_error("Too few probe arguments.\n"); | |
805 | ret = -ERANGE; | |
806 | goto out; | |
807 | } | |
4de189fe MH |
808 | |
809 | /* Scan event and group name. */ | |
93aaa45a | 810 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
811 | &pr, (float *)(void *)&tev->group, |
812 | (float *)(void *)&tev->event); | |
146a1439 MH |
813 | if (ret != 3) { |
814 | semantic_error("Failed to parse event name: %s\n", argv[0]); | |
815 | ret = -EINVAL; | |
816 | goto out; | |
817 | } | |
4235b045 | 818 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 819 | |
4235b045 | 820 | tp->retprobe = (pr == 'r'); |
4de189fe MH |
821 | |
822 | /* Scan function name and offset */ | |
4235b045 MH |
823 | ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol, |
824 | &tp->offset); | |
4de189fe | 825 | if (ret == 1) |
4235b045 | 826 | tp->offset = 0; |
4de189fe | 827 | |
4235b045 | 828 | tev->nargs = argc - 2; |
0e60836b | 829 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
830 | if (tev->args == NULL) { |
831 | ret = -ENOMEM; | |
832 | goto out; | |
833 | } | |
4235b045 | 834 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
835 | p = strchr(argv[i + 2], '='); |
836 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
837 | *p++ = '\0'; |
838 | else | |
839 | p = argv[i + 2]; | |
02b95dad | 840 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 841 | /* TODO: parse regs and offset */ |
02b95dad MH |
842 | tev->args[i].value = strdup(p); |
843 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
844 | ret = -ENOMEM; | |
845 | goto out; | |
846 | } | |
4de189fe | 847 | } |
146a1439 MH |
848 | ret = 0; |
849 | out: | |
4de189fe | 850 | argv_free(argv); |
146a1439 | 851 | return ret; |
4de189fe MH |
852 | } |
853 | ||
7df2f329 MH |
854 | /* Compose only probe arg */ |
855 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
856 | { | |
857 | struct perf_probe_arg_field *field = pa->field; | |
858 | int ret; | |
859 | char *tmp = buf; | |
860 | ||
48481938 MH |
861 | if (pa->name && pa->var) |
862 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
863 | else | |
864 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
865 | if (ret <= 0) |
866 | goto error; | |
867 | tmp += ret; | |
868 | len -= ret; | |
869 | ||
870 | while (field) { | |
b2a3c12b MH |
871 | if (field->name[0] == '[') |
872 | ret = e_snprintf(tmp, len, "%s", field->name); | |
873 | else | |
874 | ret = e_snprintf(tmp, len, "%s%s", | |
875 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
876 | if (ret <= 0) |
877 | goto error; | |
878 | tmp += ret; | |
879 | len -= ret; | |
880 | field = field->next; | |
881 | } | |
11a1ca35 MH |
882 | |
883 | if (pa->type) { | |
884 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
885 | if (ret <= 0) | |
886 | goto error; | |
887 | tmp += ret; | |
888 | len -= ret; | |
889 | } | |
890 | ||
7df2f329 MH |
891 | return tmp - buf; |
892 | error: | |
146a1439 MH |
893 | pr_debug("Failed to synthesize perf probe argument: %s", |
894 | strerror(-ret)); | |
895 | return ret; | |
7df2f329 MH |
896 | } |
897 | ||
4235b045 MH |
898 | /* Compose only probe point (not argument) */ |
899 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 900 | { |
fb1587d8 MH |
901 | char *buf, *tmp; |
902 | char offs[32] = "", line[32] = "", file[32] = ""; | |
903 | int ret, len; | |
4de189fe | 904 | |
e334016f MH |
905 | buf = zalloc(MAX_CMDLEN); |
906 | if (buf == NULL) { | |
907 | ret = -ENOMEM; | |
908 | goto error; | |
909 | } | |
4de189fe | 910 | if (pp->offset) { |
fb1587d8 | 911 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
912 | if (ret <= 0) |
913 | goto error; | |
914 | } | |
915 | if (pp->line) { | |
fb1587d8 MH |
916 | ret = e_snprintf(line, 32, ":%d", pp->line); |
917 | if (ret <= 0) | |
918 | goto error; | |
919 | } | |
920 | if (pp->file) { | |
dd259c5d | 921 | len = strlen(pp->file) - 31; |
fb1587d8 MH |
922 | if (len < 0) |
923 | len = 0; | |
924 | tmp = strchr(pp->file + len, '/'); | |
925 | if (!tmp) | |
dd259c5d | 926 | tmp = pp->file + len; |
fb1587d8 | 927 | ret = e_snprintf(file, 32, "@%s", tmp + 1); |
4de189fe MH |
928 | if (ret <= 0) |
929 | goto error; | |
930 | } | |
931 | ||
932 | if (pp->function) | |
fb1587d8 MH |
933 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
934 | offs, pp->retprobe ? "%return" : "", line, | |
935 | file); | |
4de189fe | 936 | else |
fb1587d8 | 937 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
938 | if (ret <= 0) |
939 | goto error; | |
940 | ||
941 | return buf; | |
7ef17aaf | 942 | error: |
146a1439 MH |
943 | pr_debug("Failed to synthesize perf probe point: %s", |
944 | strerror(-ret)); | |
e334016f MH |
945 | if (buf) |
946 | free(buf); | |
146a1439 | 947 | return NULL; |
7ef17aaf MH |
948 | } |
949 | ||
4235b045 MH |
950 | #if 0 |
951 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
952 | { |
953 | char *buf; | |
954 | int i, len, ret; | |
955 | ||
4235b045 MH |
956 | buf = synthesize_perf_probe_point(&pev->point); |
957 | if (!buf) | |
958 | return NULL; | |
4de189fe | 959 | |
4235b045 MH |
960 | len = strlen(buf); |
961 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 962 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
963 | pev->args[i].name); |
964 | if (ret <= 0) { | |
965 | free(buf); | |
966 | return NULL; | |
967 | } | |
4de189fe MH |
968 | len += ret; |
969 | } | |
4de189fe | 970 | |
4235b045 MH |
971 | return buf; |
972 | } | |
973 | #endif | |
974 | ||
0e60836b | 975 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
976 | char **buf, size_t *buflen, |
977 | int depth) | |
978 | { | |
979 | int ret; | |
980 | if (ref->next) { | |
0e60836b | 981 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
982 | buflen, depth + 1); |
983 | if (depth < 0) | |
984 | goto out; | |
985 | } | |
986 | ||
987 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
988 | if (ret < 0) | |
989 | depth = ret; | |
990 | else { | |
991 | *buf += ret; | |
992 | *buflen -= ret; | |
993 | } | |
994 | out: | |
995 | return depth; | |
4de189fe | 996 | |
4de189fe MH |
997 | } |
998 | ||
0e60836b | 999 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1000 | char *buf, size_t buflen) |
50656eec | 1001 | { |
0e60836b | 1002 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1003 | int ret, depth = 0; |
1004 | char *tmp = buf; | |
1005 | ||
1006 | /* Argument name or separator */ | |
1007 | if (arg->name) | |
1008 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1009 | else | |
1010 | ret = e_snprintf(buf, buflen, " "); | |
1011 | if (ret < 0) | |
1012 | return ret; | |
1013 | buf += ret; | |
1014 | buflen -= ret; | |
1015 | ||
b7dcb857 MH |
1016 | /* Special case: @XXX */ |
1017 | if (arg->value[0] == '@' && arg->ref) | |
1018 | ref = ref->next; | |
1019 | ||
4235b045 | 1020 | /* Dereferencing arguments */ |
b7dcb857 | 1021 | if (ref) { |
0e60836b | 1022 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1023 | &buflen, 1); |
1024 | if (depth < 0) | |
1025 | return depth; | |
1026 | } | |
1027 | ||
1028 | /* Print argument value */ | |
b7dcb857 MH |
1029 | if (arg->value[0] == '@' && arg->ref) |
1030 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1031 | arg->ref->offset); | |
1032 | else | |
1033 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1034 | if (ret < 0) |
1035 | return ret; | |
1036 | buf += ret; | |
1037 | buflen -= ret; | |
1038 | ||
1039 | /* Closing */ | |
1040 | while (depth--) { | |
1041 | ret = e_snprintf(buf, buflen, ")"); | |
1042 | if (ret < 0) | |
1043 | return ret; | |
1044 | buf += ret; | |
1045 | buflen -= ret; | |
1046 | } | |
4984912e MH |
1047 | /* Print argument type */ |
1048 | if (arg->type) { | |
1049 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1050 | if (ret <= 0) | |
1051 | return ret; | |
1052 | buf += ret; | |
1053 | } | |
4235b045 MH |
1054 | |
1055 | return buf - tmp; | |
1056 | } | |
1057 | ||
0e60836b | 1058 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1059 | { |
0e60836b | 1060 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1061 | char *buf; |
1062 | int i, len, ret; | |
1063 | ||
e334016f MH |
1064 | buf = zalloc(MAX_CMDLEN); |
1065 | if (buf == NULL) | |
1066 | return NULL; | |
1067 | ||
4235b045 MH |
1068 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu", |
1069 | tp->retprobe ? 'r' : 'p', | |
1070 | tev->group, tev->event, | |
1071 | tp->symbol, tp->offset); | |
1072 | if (len <= 0) | |
50656eec | 1073 | goto error; |
50656eec | 1074 | |
4235b045 | 1075 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1076 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1077 | MAX_CMDLEN - len); |
4de189fe | 1078 | if (ret <= 0) |
50656eec MH |
1079 | goto error; |
1080 | len += ret; | |
1081 | } | |
50656eec | 1082 | |
4235b045 | 1083 | return buf; |
50656eec | 1084 | error: |
4235b045 MH |
1085 | free(buf); |
1086 | return NULL; | |
1087 | } | |
50656eec | 1088 | |
0e60836b | 1089 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
146a1439 | 1090 | struct perf_probe_event *pev) |
4235b045 | 1091 | { |
02b95dad | 1092 | char buf[64] = ""; |
146a1439 | 1093 | int i, ret; |
4235b045 | 1094 | |
4b4da7f7 | 1095 | /* Convert event/group name */ |
02b95dad MH |
1096 | pev->event = strdup(tev->event); |
1097 | pev->group = strdup(tev->group); | |
1098 | if (pev->event == NULL || pev->group == NULL) | |
1099 | return -ENOMEM; | |
fb1587d8 | 1100 | |
4b4da7f7 | 1101 | /* Convert trace_point to probe_point */ |
0e60836b | 1102 | ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); |
146a1439 MH |
1103 | if (ret < 0) |
1104 | return ret; | |
4b4da7f7 | 1105 | |
4235b045 MH |
1106 | /* Convert trace_arg to probe_arg */ |
1107 | pev->nargs = tev->nargs; | |
e334016f MH |
1108 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1109 | if (pev->args == NULL) | |
1110 | return -ENOMEM; | |
02b95dad | 1111 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1112 | if (tev->args[i].name) |
02b95dad | 1113 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1114 | else { |
0e60836b | 1115 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1116 | buf, 64); |
02b95dad | 1117 | pev->args[i].name = strdup(buf); |
4235b045 | 1118 | } |
02b95dad MH |
1119 | if (pev->args[i].name == NULL && ret >= 0) |
1120 | ret = -ENOMEM; | |
1121 | } | |
146a1439 MH |
1122 | |
1123 | if (ret < 0) | |
1124 | clear_perf_probe_event(pev); | |
1125 | ||
1126 | return ret; | |
4235b045 MH |
1127 | } |
1128 | ||
1129 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1130 | { | |
1131 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1132 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1133 | int i; |
1134 | ||
1135 | if (pev->event) | |
1136 | free(pev->event); | |
1137 | if (pev->group) | |
1138 | free(pev->group); | |
1139 | if (pp->file) | |
1140 | free(pp->file); | |
1141 | if (pp->function) | |
1142 | free(pp->function); | |
1143 | if (pp->lazy_line) | |
1144 | free(pp->lazy_line); | |
7df2f329 | 1145 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1146 | if (pev->args[i].name) |
1147 | free(pev->args[i].name); | |
48481938 MH |
1148 | if (pev->args[i].var) |
1149 | free(pev->args[i].var); | |
11a1ca35 MH |
1150 | if (pev->args[i].type) |
1151 | free(pev->args[i].type); | |
7df2f329 MH |
1152 | field = pev->args[i].field; |
1153 | while (field) { | |
1154 | next = field->next; | |
1155 | if (field->name) | |
1156 | free(field->name); | |
1157 | free(field); | |
1158 | field = next; | |
1159 | } | |
1160 | } | |
4235b045 MH |
1161 | if (pev->args) |
1162 | free(pev->args); | |
1163 | memset(pev, 0, sizeof(*pev)); | |
1164 | } | |
1165 | ||
0e60836b | 1166 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1167 | { |
0e60836b | 1168 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1169 | int i; |
1170 | ||
1171 | if (tev->event) | |
1172 | free(tev->event); | |
1173 | if (tev->group) | |
1174 | free(tev->group); | |
1175 | if (tev->point.symbol) | |
1176 | free(tev->point.symbol); | |
1177 | for (i = 0; i < tev->nargs; i++) { | |
1178 | if (tev->args[i].name) | |
1179 | free(tev->args[i].name); | |
1180 | if (tev->args[i].value) | |
1181 | free(tev->args[i].value); | |
4984912e MH |
1182 | if (tev->args[i].type) |
1183 | free(tev->args[i].type); | |
4235b045 MH |
1184 | ref = tev->args[i].ref; |
1185 | while (ref) { | |
1186 | next = ref->next; | |
1187 | free(ref); | |
1188 | ref = next; | |
1189 | } | |
1190 | } | |
1191 | if (tev->args) | |
1192 | free(tev->args); | |
1193 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1194 | } |
1195 | ||
f4d7da49 | 1196 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
1197 | { |
1198 | char buf[PATH_MAX]; | |
7ca5989d | 1199 | const char *__debugfs; |
4de189fe MH |
1200 | int ret; |
1201 | ||
7ca5989d MH |
1202 | __debugfs = debugfs_find_mountpoint(); |
1203 | if (__debugfs == NULL) { | |
1204 | pr_warning("Debugfs is not mounted.\n"); | |
1205 | return -ENOENT; | |
1206 | } | |
1207 | ||
1208 | ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); | |
146a1439 | 1209 | if (ret >= 0) { |
7ca5989d | 1210 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1211 | if (readwrite && !probe_event_dry_run) |
1212 | ret = open(buf, O_RDWR, O_APPEND); | |
1213 | else | |
1214 | ret = open(buf, O_RDONLY, 0); | |
1215 | } | |
f4d7da49 | 1216 | |
4de189fe MH |
1217 | if (ret < 0) { |
1218 | if (errno == ENOENT) | |
146a1439 MH |
1219 | pr_warning("kprobe_events file does not exist - please" |
1220 | " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); | |
4de189fe | 1221 | else |
146a1439 MH |
1222 | pr_warning("Failed to open kprobe_events file: %s\n", |
1223 | strerror(errno)); | |
4de189fe MH |
1224 | } |
1225 | return ret; | |
1226 | } | |
1227 | ||
1228 | /* Get raw string list of current kprobe_events */ | |
0e60836b | 1229 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1230 | { |
1231 | int ret, idx; | |
1232 | FILE *fp; | |
1233 | char buf[MAX_CMDLEN]; | |
1234 | char *p; | |
1235 | struct strlist *sl; | |
1236 | ||
1237 | sl = strlist__new(true, NULL); | |
1238 | ||
1239 | fp = fdopen(dup(fd), "r"); | |
1240 | while (!feof(fp)) { | |
1241 | p = fgets(buf, MAX_CMDLEN, fp); | |
1242 | if (!p) | |
1243 | break; | |
1244 | ||
1245 | idx = strlen(p) - 1; | |
1246 | if (p[idx] == '\n') | |
1247 | p[idx] = '\0'; | |
1248 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1249 | if (ret < 0) { |
1250 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1251 | strlist__delete(sl); | |
1252 | return NULL; | |
1253 | } | |
4de189fe MH |
1254 | } |
1255 | fclose(fp); | |
1256 | ||
1257 | return sl; | |
1258 | } | |
1259 | ||
278498d4 | 1260 | /* Show an event */ |
146a1439 | 1261 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1262 | { |
7e990a51 | 1263 | int i, ret; |
278498d4 | 1264 | char buf[128]; |
4235b045 | 1265 | char *place; |
278498d4 | 1266 | |
4235b045 MH |
1267 | /* Synthesize only event probe point */ |
1268 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1269 | if (!place) |
1270 | return -EINVAL; | |
4235b045 MH |
1271 | |
1272 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1273 | if (ret < 0) |
146a1439 MH |
1274 | return ret; |
1275 | ||
fb1587d8 | 1276 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1277 | |
4235b045 | 1278 | if (pev->nargs > 0) { |
278498d4 | 1279 | printf(" with"); |
7df2f329 | 1280 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1281 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1282 | buf, 128); | |
1283 | if (ret < 0) | |
1284 | break; | |
7df2f329 MH |
1285 | printf(" %s", buf); |
1286 | } | |
278498d4 MH |
1287 | } |
1288 | printf(")\n"); | |
4235b045 | 1289 | free(place); |
146a1439 | 1290 | return ret; |
278498d4 MH |
1291 | } |
1292 | ||
4de189fe | 1293 | /* List up current perf-probe events */ |
146a1439 | 1294 | int show_perf_probe_events(void) |
4de189fe | 1295 | { |
146a1439 | 1296 | int fd, ret; |
0e60836b | 1297 | struct probe_trace_event tev; |
4235b045 | 1298 | struct perf_probe_event pev; |
4de189fe MH |
1299 | struct strlist *rawlist; |
1300 | struct str_node *ent; | |
1301 | ||
72041334 | 1302 | setup_pager(); |
146a1439 MH |
1303 | ret = init_vmlinux(); |
1304 | if (ret < 0) | |
1305 | return ret; | |
4235b045 MH |
1306 | |
1307 | memset(&tev, 0, sizeof(tev)); | |
1308 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1309 | |
f4d7da49 | 1310 | fd = open_kprobe_events(false); |
146a1439 MH |
1311 | if (fd < 0) |
1312 | return fd; | |
1313 | ||
0e60836b | 1314 | rawlist = get_probe_trace_command_rawlist(fd); |
4de189fe | 1315 | close(fd); |
146a1439 MH |
1316 | if (!rawlist) |
1317 | return -ENOENT; | |
4de189fe | 1318 | |
adf365f4 | 1319 | strlist__for_each(ent, rawlist) { |
0e60836b | 1320 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1321 | if (ret >= 0) { |
1322 | ret = convert_to_perf_probe_event(&tev, &pev); | |
1323 | if (ret >= 0) | |
1324 | ret = show_perf_probe_event(&pev); | |
1325 | } | |
4235b045 | 1326 | clear_perf_probe_event(&pev); |
0e60836b | 1327 | clear_probe_trace_event(&tev); |
146a1439 MH |
1328 | if (ret < 0) |
1329 | break; | |
4de189fe | 1330 | } |
4de189fe | 1331 | strlist__delete(rawlist); |
146a1439 MH |
1332 | |
1333 | return ret; | |
4de189fe MH |
1334 | } |
1335 | ||
b498ce1f | 1336 | /* Get current perf-probe event names */ |
0e60836b | 1337 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1338 | { |
fa28244d | 1339 | char buf[128]; |
b498ce1f MH |
1340 | struct strlist *sl, *rawlist; |
1341 | struct str_node *ent; | |
0e60836b | 1342 | struct probe_trace_event tev; |
146a1439 | 1343 | int ret = 0; |
b498ce1f | 1344 | |
4235b045 | 1345 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 1346 | rawlist = get_probe_trace_command_rawlist(fd); |
e1d2017b | 1347 | sl = strlist__new(true, NULL); |
adf365f4 | 1348 | strlist__for_each(ent, rawlist) { |
0e60836b | 1349 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1350 | if (ret < 0) |
1351 | break; | |
fa28244d | 1352 | if (include_group) { |
146a1439 MH |
1353 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1354 | tev.event); | |
1355 | if (ret >= 0) | |
1356 | ret = strlist__add(sl, buf); | |
fa28244d | 1357 | } else |
146a1439 | 1358 | ret = strlist__add(sl, tev.event); |
0e60836b | 1359 | clear_probe_trace_event(&tev); |
146a1439 MH |
1360 | if (ret < 0) |
1361 | break; | |
b498ce1f | 1362 | } |
b498ce1f MH |
1363 | strlist__delete(rawlist); |
1364 | ||
146a1439 MH |
1365 | if (ret < 0) { |
1366 | strlist__delete(sl); | |
1367 | return NULL; | |
1368 | } | |
b498ce1f MH |
1369 | return sl; |
1370 | } | |
1371 | ||
0e60836b | 1372 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 1373 | { |
6eca8cc3 | 1374 | int ret = 0; |
0e60836b | 1375 | char *buf = synthesize_probe_trace_command(tev); |
50656eec | 1376 | |
146a1439 | 1377 | if (!buf) { |
0e60836b | 1378 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
1379 | return -EINVAL; |
1380 | } | |
1381 | ||
fa28244d | 1382 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1383 | if (!probe_event_dry_run) { |
1384 | ret = write(fd, buf, strlen(buf)); | |
1385 | if (ret <= 0) | |
146a1439 MH |
1386 | pr_warning("Failed to write event: %s\n", |
1387 | strerror(errno)); | |
f4d7da49 | 1388 | } |
4235b045 | 1389 | free(buf); |
146a1439 | 1390 | return ret; |
50656eec MH |
1391 | } |
1392 | ||
146a1439 MH |
1393 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1394 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1395 | { |
1396 | int i, ret; | |
17f88fcd MH |
1397 | |
1398 | /* Try no suffix */ | |
1399 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1400 | if (ret < 0) { |
1401 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1402 | return ret; | |
1403 | } | |
17f88fcd | 1404 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1405 | return 0; |
17f88fcd | 1406 | |
d761b08b MH |
1407 | if (!allow_suffix) { |
1408 | pr_warning("Error: event \"%s\" already exists. " | |
1409 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1410 | return -EEXIST; |
d761b08b MH |
1411 | } |
1412 | ||
17f88fcd MH |
1413 | /* Try to add suffix */ |
1414 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1415 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1416 | if (ret < 0) { |
1417 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1418 | return ret; | |
1419 | } | |
b498ce1f MH |
1420 | if (!strlist__has_entry(namelist, buf)) |
1421 | break; | |
1422 | } | |
146a1439 MH |
1423 | if (i == MAX_EVENT_INDEX) { |
1424 | pr_warning("Too many events are on the same function.\n"); | |
1425 | ret = -ERANGE; | |
1426 | } | |
1427 | ||
1428 | return ret; | |
b498ce1f MH |
1429 | } |
1430 | ||
0e60836b SD |
1431 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
1432 | struct probe_trace_event *tevs, | |
146a1439 | 1433 | int ntevs, bool allow_suffix) |
50656eec | 1434 | { |
146a1439 | 1435 | int i, fd, ret; |
0e60836b | 1436 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
1437 | char buf[64]; |
1438 | const char *event, *group; | |
b498ce1f | 1439 | struct strlist *namelist; |
50656eec | 1440 | |
f4d7da49 | 1441 | fd = open_kprobe_events(true); |
146a1439 MH |
1442 | if (fd < 0) |
1443 | return fd; | |
b498ce1f | 1444 | /* Get current event names */ |
0e60836b | 1445 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
1446 | if (!namelist) { |
1447 | pr_debug("Failed to get current event list.\n"); | |
1448 | return -EIO; | |
1449 | } | |
4235b045 | 1450 | |
146a1439 | 1451 | ret = 0; |
4235b045 | 1452 | printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1453 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1454 | tev = &tevs[i]; |
1455 | if (pev->event) | |
1456 | event = pev->event; | |
1457 | else | |
1458 | if (pev->point.function) | |
1459 | event = pev->point.function; | |
1460 | else | |
1461 | event = tev->point.symbol; | |
1462 | if (pev->group) | |
1463 | group = pev->group; | |
1464 | else | |
1465 | group = PERFPROBE_GROUP; | |
1466 | ||
1467 | /* Get an unused new event name */ | |
146a1439 MH |
1468 | ret = get_new_event_name(buf, 64, event, |
1469 | namelist, allow_suffix); | |
1470 | if (ret < 0) | |
1471 | break; | |
4235b045 MH |
1472 | event = buf; |
1473 | ||
02b95dad MH |
1474 | tev->event = strdup(event); |
1475 | tev->group = strdup(group); | |
1476 | if (tev->event == NULL || tev->group == NULL) { | |
1477 | ret = -ENOMEM; | |
1478 | break; | |
1479 | } | |
0e60836b | 1480 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
1481 | if (ret < 0) |
1482 | break; | |
4235b045 MH |
1483 | /* Add added event name to namelist */ |
1484 | strlist__add(namelist, event); | |
1485 | ||
1486 | /* Trick here - save current event/group */ | |
1487 | event = pev->event; | |
1488 | group = pev->group; | |
1489 | pev->event = tev->event; | |
1490 | pev->group = tev->group; | |
1491 | show_perf_probe_event(pev); | |
1492 | /* Trick here - restore current event/group */ | |
1493 | pev->event = (char *)event; | |
1494 | pev->group = (char *)group; | |
1495 | ||
1496 | /* | |
1497 | * Probes after the first probe which comes from same | |
1498 | * user input are always allowed to add suffix, because | |
1499 | * there might be several addresses corresponding to | |
1500 | * one code line. | |
1501 | */ | |
1502 | allow_suffix = true; | |
50656eec | 1503 | } |
146a1439 MH |
1504 | |
1505 | if (ret >= 0) { | |
1506 | /* Show how to use the event. */ | |
1507 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
1508 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
1509 | tev->event); | |
1510 | } | |
a9b495b0 | 1511 | |
e1d2017b | 1512 | strlist__delete(namelist); |
50656eec | 1513 | close(fd); |
146a1439 | 1514 | return ret; |
50656eec | 1515 | } |
fa28244d | 1516 | |
0e60836b SD |
1517 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
1518 | struct probe_trace_event **tevs, | |
ef4a3565 | 1519 | int max_tevs) |
e0faa8d3 MH |
1520 | { |
1521 | struct symbol *sym; | |
e334016f | 1522 | int ret = 0, i; |
0e60836b | 1523 | struct probe_trace_event *tev; |
4235b045 | 1524 | |
4b4da7f7 | 1525 | /* Convert perf_probe_event with debuginfo */ |
0e60836b | 1526 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs); |
e334016f MH |
1527 | if (ret != 0) |
1528 | return ret; | |
e0faa8d3 | 1529 | |
4235b045 | 1530 | /* Allocate trace event buffer */ |
0e60836b | 1531 | tev = *tevs = zalloc(sizeof(struct probe_trace_event)); |
e334016f MH |
1532 | if (tev == NULL) |
1533 | return -ENOMEM; | |
4235b045 MH |
1534 | |
1535 | /* Copy parameters */ | |
02b95dad MH |
1536 | tev->point.symbol = strdup(pev->point.function); |
1537 | if (tev->point.symbol == NULL) { | |
1538 | ret = -ENOMEM; | |
1539 | goto error; | |
1540 | } | |
4235b045 | 1541 | tev->point.offset = pev->point.offset; |
04ddd04b | 1542 | tev->point.retprobe = pev->point.retprobe; |
4235b045 MH |
1543 | tev->nargs = pev->nargs; |
1544 | if (tev->nargs) { | |
0e60836b | 1545 | tev->args = zalloc(sizeof(struct probe_trace_arg) |
e334016f MH |
1546 | * tev->nargs); |
1547 | if (tev->args == NULL) { | |
02b95dad MH |
1548 | ret = -ENOMEM; |
1549 | goto error; | |
e334016f | 1550 | } |
48481938 | 1551 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1552 | if (pev->args[i].name) { |
1553 | tev->args[i].name = strdup(pev->args[i].name); | |
1554 | if (tev->args[i].name == NULL) { | |
1555 | ret = -ENOMEM; | |
1556 | goto error; | |
1557 | } | |
1558 | } | |
1559 | tev->args[i].value = strdup(pev->args[i].var); | |
1560 | if (tev->args[i].value == NULL) { | |
1561 | ret = -ENOMEM; | |
1562 | goto error; | |
1563 | } | |
1564 | if (pev->args[i].type) { | |
1565 | tev->args[i].type = strdup(pev->args[i].type); | |
1566 | if (tev->args[i].type == NULL) { | |
1567 | ret = -ENOMEM; | |
1568 | goto error; | |
1569 | } | |
1570 | } | |
48481938 | 1571 | } |
4235b045 MH |
1572 | } |
1573 | ||
1574 | /* Currently just checking function name from symbol map */ | |
d28c6223 | 1575 | sym = map__find_symbol_by_name(machine.vmlinux_maps[MAP__FUNCTION], |
4235b045 | 1576 | tev->point.symbol, NULL); |
146a1439 MH |
1577 | if (!sym) { |
1578 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1579 | tev->point.symbol); | |
02b95dad MH |
1580 | ret = -ENOENT; |
1581 | goto error; | |
1582 | } | |
e334016f | 1583 | |
02b95dad MH |
1584 | return 1; |
1585 | error: | |
0e60836b | 1586 | clear_probe_trace_event(tev); |
02b95dad MH |
1587 | free(tev); |
1588 | *tevs = NULL; | |
e334016f | 1589 | return ret; |
4235b045 MH |
1590 | } |
1591 | ||
1592 | struct __event_package { | |
1593 | struct perf_probe_event *pev; | |
0e60836b | 1594 | struct probe_trace_event *tevs; |
4235b045 MH |
1595 | int ntevs; |
1596 | }; | |
1597 | ||
146a1439 | 1598 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
ef4a3565 | 1599 | bool force_add, int max_tevs) |
4235b045 | 1600 | { |
146a1439 | 1601 | int i, j, ret; |
4235b045 MH |
1602 | struct __event_package *pkgs; |
1603 | ||
e334016f MH |
1604 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
1605 | if (pkgs == NULL) | |
1606 | return -ENOMEM; | |
4235b045 MH |
1607 | |
1608 | /* Init vmlinux path */ | |
146a1439 | 1609 | ret = init_vmlinux(); |
449e5b24 MH |
1610 | if (ret < 0) { |
1611 | free(pkgs); | |
146a1439 | 1612 | return ret; |
449e5b24 | 1613 | } |
4235b045 MH |
1614 | |
1615 | /* Loop 1: convert all events */ | |
1616 | for (i = 0; i < npevs; i++) { | |
1617 | pkgs[i].pev = &pevs[i]; | |
1618 | /* Convert with or without debuginfo */ | |
0e60836b | 1619 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
ef4a3565 | 1620 | &pkgs[i].tevs, max_tevs); |
146a1439 MH |
1621 | if (ret < 0) |
1622 | goto end; | |
1623 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
1624 | } |
1625 | ||
4235b045 | 1626 | /* Loop 2: add all events */ |
146a1439 | 1627 | for (i = 0; i < npevs && ret >= 0; i++) |
0e60836b | 1628 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 MH |
1629 | pkgs[i].ntevs, force_add); |
1630 | end: | |
449e5b24 MH |
1631 | /* Loop 3: cleanup and free trace events */ |
1632 | for (i = 0; i < npevs; i++) { | |
146a1439 | 1633 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 1634 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
449e5b24 MH |
1635 | free(pkgs[i].tevs); |
1636 | } | |
1637 | free(pkgs); | |
146a1439 MH |
1638 | |
1639 | return ret; | |
e0faa8d3 MH |
1640 | } |
1641 | ||
0e60836b | 1642 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
1643 | { |
1644 | char *p; | |
1645 | char buf[128]; | |
4235b045 | 1646 | int ret; |
bbbb521b | 1647 | |
0e60836b | 1648 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
1649 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
1650 | if (ret < 0) | |
1651 | goto error; | |
1652 | ||
bbbb521b | 1653 | p = strchr(buf + 2, ':'); |
146a1439 MH |
1654 | if (!p) { |
1655 | pr_debug("Internal error: %s should have ':' but not.\n", | |
1656 | ent->s); | |
1657 | ret = -ENOTSUP; | |
1658 | goto error; | |
1659 | } | |
bbbb521b MH |
1660 | *p = '/'; |
1661 | ||
4235b045 MH |
1662 | pr_debug("Writing event: %s\n", buf); |
1663 | ret = write(fd, buf, strlen(buf)); | |
146a1439 MH |
1664 | if (ret < 0) |
1665 | goto error; | |
1666 | ||
bbbb521b | 1667 | printf("Remove event: %s\n", ent->s); |
146a1439 MH |
1668 | return 0; |
1669 | error: | |
1670 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
1671 | return ret; | |
bbbb521b MH |
1672 | } |
1673 | ||
0e60836b | 1674 | static int del_trace_probe_event(int fd, const char *group, |
146a1439 | 1675 | const char *event, struct strlist *namelist) |
fa28244d MH |
1676 | { |
1677 | char buf[128]; | |
bbbb521b | 1678 | struct str_node *ent, *n; |
146a1439 | 1679 | int found = 0, ret = 0; |
fa28244d | 1680 | |
146a1439 MH |
1681 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
1682 | if (ret < 0) { | |
1683 | pr_err("Failed to copy event."); | |
1684 | return ret; | |
1685 | } | |
fa28244d | 1686 | |
bbbb521b MH |
1687 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
1688 | strlist__for_each_safe(ent, n, namelist) | |
1689 | if (strglobmatch(ent->s, buf)) { | |
1690 | found++; | |
0e60836b | 1691 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
1692 | if (ret < 0) |
1693 | break; | |
bbbb521b MH |
1694 | strlist__remove(namelist, ent); |
1695 | } | |
1696 | } else { | |
1697 | ent = strlist__find(namelist, buf); | |
1698 | if (ent) { | |
1699 | found++; | |
0e60836b | 1700 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
1701 | if (ret >= 0) |
1702 | strlist__remove(namelist, ent); | |
bbbb521b MH |
1703 | } |
1704 | } | |
146a1439 MH |
1705 | if (found == 0 && ret >= 0) |
1706 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
1707 | ||
1708 | return ret; | |
fa28244d MH |
1709 | } |
1710 | ||
146a1439 | 1711 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 1712 | { |
146a1439 | 1713 | int fd, ret = 0; |
fa28244d MH |
1714 | const char *group, *event; |
1715 | char *p, *str; | |
1716 | struct str_node *ent; | |
1717 | struct strlist *namelist; | |
1718 | ||
f4d7da49 | 1719 | fd = open_kprobe_events(true); |
146a1439 MH |
1720 | if (fd < 0) |
1721 | return fd; | |
1722 | ||
fa28244d | 1723 | /* Get current event names */ |
0e60836b | 1724 | namelist = get_probe_trace_event_names(fd, true); |
146a1439 MH |
1725 | if (namelist == NULL) |
1726 | return -EINVAL; | |
fa28244d | 1727 | |
adf365f4 | 1728 | strlist__for_each(ent, dellist) { |
02b95dad MH |
1729 | str = strdup(ent->s); |
1730 | if (str == NULL) { | |
1731 | ret = -ENOMEM; | |
1732 | break; | |
1733 | } | |
bbbb521b | 1734 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
1735 | p = strchr(str, ':'); |
1736 | if (p) { | |
1737 | group = str; | |
1738 | *p = '\0'; | |
1739 | event = p + 1; | |
1740 | } else { | |
bbbb521b | 1741 | group = "*"; |
fa28244d MH |
1742 | event = str; |
1743 | } | |
bbbb521b | 1744 | pr_debug("Group: %s, Event: %s\n", group, event); |
0e60836b | 1745 | ret = del_trace_probe_event(fd, group, event, namelist); |
fa28244d | 1746 | free(str); |
146a1439 MH |
1747 | if (ret < 0) |
1748 | break; | |
fa28244d MH |
1749 | } |
1750 | strlist__delete(namelist); | |
1751 | close(fd); | |
146a1439 MH |
1752 | |
1753 | return ret; | |
fa28244d MH |
1754 | } |
1755 |