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 | |
469b9b88 | 77 | /* Initialize symbol maps and path of vmlinux/modules */ |
146a1439 | 78 | static int init_vmlinux(void) |
e0faa8d3 | 79 | { |
146a1439 MH |
80 | int ret; |
81 | ||
e0faa8d3 MH |
82 | symbol_conf.sort_by_name = true; |
83 | if (symbol_conf.vmlinux_name == NULL) | |
84 | symbol_conf.try_vmlinux_path = true; | |
85 | else | |
86 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
146a1439 MH |
87 | ret = symbol__init(); |
88 | if (ret < 0) { | |
89 | pr_debug("Failed to init symbol map.\n"); | |
90 | goto out; | |
91 | } | |
e0faa8d3 | 92 | |
469b9b88 | 93 | ret = machine__init(&machine, "", HOST_KERNEL_ID); |
d28c6223 ACM |
94 | if (ret < 0) |
95 | goto out; | |
96 | ||
469b9b88 MH |
97 | if (machine__create_kernel_maps(&machine) < 0) { |
98 | pr_debug("machine__create_kernel_maps "); | |
99 | goto out; | |
100 | } | |
146a1439 MH |
101 | out: |
102 | if (ret < 0) | |
103 | pr_warning("Failed to init vmlinux path.\n"); | |
104 | return ret; | |
e0faa8d3 MH |
105 | } |
106 | ||
469b9b88 MH |
107 | static struct symbol *__find_kernel_function_by_name(const char *name, |
108 | struct map **mapp) | |
109 | { | |
110 | return machine__find_kernel_function_by_name(&machine, name, mapp, | |
111 | NULL); | |
112 | } | |
113 | ||
114 | const char *kernel_get_module_path(const char *module) | |
115 | { | |
116 | struct dso *dso; | |
117 | ||
118 | if (module) { | |
119 | list_for_each_entry(dso, &machine.kernel_dsos, node) { | |
120 | if (strncmp(dso->short_name + 1, module, | |
121 | dso->short_name_len - 2) == 0) | |
122 | goto found; | |
123 | } | |
124 | pr_debug("Failed to find module %s.\n", module); | |
125 | return NULL; | |
126 | } else { | |
127 | dso = machine.vmlinux_maps[MAP__FUNCTION]->dso; | |
128 | if (dso__load_vmlinux_path(dso, | |
129 | machine.vmlinux_maps[MAP__FUNCTION], NULL) < 0) { | |
130 | pr_debug("Failed to load kernel map.\n"); | |
131 | return NULL; | |
132 | } | |
133 | } | |
134 | found: | |
135 | return dso->long_name; | |
136 | } | |
137 | ||
4b4da7f7 | 138 | #ifdef DWARF_SUPPORT |
469b9b88 | 139 | static int open_vmlinux(const char *module) |
e0faa8d3 | 140 | { |
469b9b88 MH |
141 | const char *path = kernel_get_module_path(module); |
142 | if (!path) { | |
143 | pr_err("Failed to find path of %s module", module ?: "kernel"); | |
144 | return -ENOENT; | |
e0faa8d3 | 145 | } |
469b9b88 MH |
146 | pr_debug("Try to open %s\n", path); |
147 | return open(path, O_RDONLY); | |
e0faa8d3 | 148 | } |
4b4da7f7 | 149 | |
0e60836b SD |
150 | /* |
151 | * Convert trace point to probe point with debuginfo | |
152 | * Currently only handles kprobes. | |
153 | */ | |
154 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, | |
469b9b88 | 155 | struct perf_probe_point *pp) |
4b4da7f7 MH |
156 | { |
157 | struct symbol *sym; | |
469b9b88 MH |
158 | struct map *map; |
159 | u64 addr; | |
160 | int ret = -ENOENT; | |
4b4da7f7 | 161 | |
469b9b88 | 162 | sym = __find_kernel_function_by_name(tp->symbol, &map); |
4b4da7f7 | 163 | if (sym) { |
469b9b88 MH |
164 | addr = map->unmap_ip(map, sym->start + tp->offset); |
165 | pr_debug("try to find %s+%ld@%llx\n", tp->symbol, | |
166 | tp->offset, addr); | |
167 | ret = find_perf_probe_point((unsigned long)addr, pp); | |
4b4da7f7 MH |
168 | } |
169 | if (ret <= 0) { | |
146a1439 MH |
170 | pr_debug("Failed to find corresponding probes from " |
171 | "debuginfo. Use kprobe event information.\n"); | |
02b95dad MH |
172 | pp->function = strdup(tp->symbol); |
173 | if (pp->function == NULL) | |
174 | return -ENOMEM; | |
4b4da7f7 MH |
175 | pp->offset = tp->offset; |
176 | } | |
177 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
178 | |
179 | return 0; | |
4b4da7f7 MH |
180 | } |
181 | ||
182 | /* Try to find perf_probe_event with debuginfo */ | |
0e60836b SD |
183 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
184 | struct probe_trace_event **tevs, | |
469b9b88 | 185 | int max_tevs, const char *module) |
4b4da7f7 MH |
186 | { |
187 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
188 | int fd, ntevs; | |
189 | ||
469b9b88 | 190 | fd = open_vmlinux(module); |
4b4da7f7 | 191 | if (fd < 0) { |
146a1439 MH |
192 | if (need_dwarf) { |
193 | pr_warning("Failed to open debuginfo file.\n"); | |
194 | return fd; | |
195 | } | |
4b4da7f7 MH |
196 | pr_debug("Could not open vmlinux. Try to use symbols.\n"); |
197 | return 0; | |
198 | } | |
199 | ||
200 | /* Searching trace events corresponding to probe event */ | |
0e60836b | 201 | ntevs = find_probe_trace_events(fd, pev, tevs, max_tevs); |
4b4da7f7 MH |
202 | close(fd); |
203 | ||
146a1439 | 204 | if (ntevs > 0) { /* Succeeded to find trace events */ |
0e60836b | 205 | pr_debug("find %d probe_trace_events.\n", ntevs); |
4b4da7f7 | 206 | return ntevs; |
146a1439 | 207 | } |
4b4da7f7 | 208 | |
146a1439 MH |
209 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
210 | pr_warning("Probe point '%s' not found.\n", | |
211 | synthesize_perf_probe_point(&pev->point)); | |
212 | return -ENOENT; | |
213 | } | |
214 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
215 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
216 | if (ntevs == -EBADF) { | |
217 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
218 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
219 | if (!need_dwarf) { | |
220 | pr_debug("Trying to use symbols.\nn"); | |
221 | return 0; | |
222 | } | |
4b4da7f7 | 223 | } |
15eca306 | 224 | return ntevs; |
4b4da7f7 MH |
225 | } |
226 | ||
7cf0b79e MH |
227 | /* |
228 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
229 | * and chop off leading directories that do not exist. Result is passed back as | |
230 | * a newly allocated path on success. | |
231 | * Return 0 if file was found and readable, -errno otherwise. | |
232 | */ | |
6a330a3c MH |
233 | static int get_real_path(const char *raw_path, const char *comp_dir, |
234 | char **new_path) | |
7cf0b79e | 235 | { |
6a330a3c MH |
236 | const char *prefix = symbol_conf.source_prefix; |
237 | ||
238 | if (!prefix) { | |
239 | if (raw_path[0] != '/' && comp_dir) | |
240 | /* If not an absolute path, try to use comp_dir */ | |
241 | prefix = comp_dir; | |
242 | else { | |
243 | if (access(raw_path, R_OK) == 0) { | |
244 | *new_path = strdup(raw_path); | |
245 | return 0; | |
246 | } else | |
247 | return -errno; | |
248 | } | |
7cf0b79e MH |
249 | } |
250 | ||
6a330a3c | 251 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
7cf0b79e MH |
252 | if (!*new_path) |
253 | return -ENOMEM; | |
254 | ||
255 | for (;;) { | |
6a330a3c | 256 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
7cf0b79e MH |
257 | |
258 | if (access(*new_path, R_OK) == 0) | |
259 | return 0; | |
260 | ||
6a330a3c MH |
261 | if (!symbol_conf.source_prefix) |
262 | /* In case of searching comp_dir, don't retry */ | |
263 | return -errno; | |
264 | ||
7cf0b79e MH |
265 | switch (errno) { |
266 | case ENAMETOOLONG: | |
267 | case ENOENT: | |
268 | case EROFS: | |
269 | case EFAULT: | |
270 | raw_path = strchr(++raw_path, '/'); | |
271 | if (!raw_path) { | |
272 | free(*new_path); | |
273 | *new_path = NULL; | |
274 | return -ENOENT; | |
275 | } | |
276 | continue; | |
277 | ||
278 | default: | |
279 | free(*new_path); | |
280 | *new_path = NULL; | |
281 | return -errno; | |
282 | } | |
283 | } | |
284 | } | |
285 | ||
4b4da7f7 MH |
286 | #define LINEBUF_SIZE 256 |
287 | #define NR_ADDITIONAL_LINES 2 | |
288 | ||
d3b63d7a | 289 | static int show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
290 | { |
291 | char buf[LINEBUF_SIZE]; | |
292 | const char *color = PERF_COLOR_BLUE; | |
293 | ||
294 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
295 | goto error; | |
296 | if (!skip) { | |
297 | if (show_num) | |
d3b63d7a | 298 | fprintf(stdout, "%7d %s", l, buf); |
4b4da7f7 MH |
299 | else |
300 | color_fprintf(stdout, color, " %s", buf); | |
301 | } | |
302 | ||
303 | while (strlen(buf) == LINEBUF_SIZE - 1 && | |
304 | buf[LINEBUF_SIZE - 2] != '\n') { | |
305 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
306 | goto error; | |
307 | if (!skip) { | |
308 | if (show_num) | |
309 | fprintf(stdout, "%s", buf); | |
310 | else | |
311 | color_fprintf(stdout, color, "%s", buf); | |
312 | } | |
313 | } | |
146a1439 MH |
314 | |
315 | return 0; | |
4b4da7f7 MH |
316 | error: |
317 | if (feof(fp)) | |
146a1439 | 318 | pr_warning("Source file is shorter than expected.\n"); |
4b4da7f7 | 319 | else |
146a1439 MH |
320 | pr_warning("File read error: %s\n", strerror(errno)); |
321 | ||
322 | return -1; | |
4b4da7f7 MH |
323 | } |
324 | ||
325 | /* | |
326 | * Show line-range always requires debuginfo to find source file and | |
327 | * line number. | |
328 | */ | |
469b9b88 | 329 | int show_line_range(struct line_range *lr, const char *module) |
4b4da7f7 | 330 | { |
d3b63d7a | 331 | int l = 1; |
4b4da7f7 MH |
332 | struct line_node *ln; |
333 | FILE *fp; | |
334 | int fd, ret; | |
7cf0b79e | 335 | char *tmp; |
4b4da7f7 MH |
336 | |
337 | /* Search a line range */ | |
146a1439 MH |
338 | ret = init_vmlinux(); |
339 | if (ret < 0) | |
340 | return ret; | |
341 | ||
469b9b88 | 342 | fd = open_vmlinux(module); |
146a1439 MH |
343 | if (fd < 0) { |
344 | pr_warning("Failed to open debuginfo file.\n"); | |
345 | return fd; | |
346 | } | |
347 | ||
4b4da7f7 | 348 | ret = find_line_range(fd, lr); |
4b4da7f7 | 349 | close(fd); |
146a1439 MH |
350 | if (ret == 0) { |
351 | pr_warning("Specified source line is not found.\n"); | |
352 | return -ENOENT; | |
353 | } else if (ret < 0) { | |
354 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
355 | return ret; | |
356 | } | |
4b4da7f7 | 357 | |
7cf0b79e MH |
358 | /* Convert source file path */ |
359 | tmp = lr->path; | |
6a330a3c | 360 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
7cf0b79e MH |
361 | free(tmp); /* Free old path */ |
362 | if (ret < 0) { | |
363 | pr_warning("Failed to find source file. (%d)\n", ret); | |
364 | return ret; | |
365 | } | |
366 | ||
4b4da7f7 MH |
367 | setup_pager(); |
368 | ||
369 | if (lr->function) | |
370 | fprintf(stdout, "<%s:%d>\n", lr->function, | |
371 | lr->start - lr->offset); | |
372 | else | |
373 | fprintf(stdout, "<%s:%d>\n", lr->file, lr->start); | |
374 | ||
375 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
376 | if (fp == NULL) { |
377 | pr_warning("Failed to open %s: %s\n", lr->path, | |
378 | strerror(errno)); | |
379 | return -errno; | |
380 | } | |
4b4da7f7 | 381 | /* Skip to starting line number */ |
146a1439 MH |
382 | while (l < lr->start && ret >= 0) |
383 | ret = show_one_line(fp, l++, true, false); | |
384 | if (ret < 0) | |
385 | goto end; | |
4b4da7f7 MH |
386 | |
387 | list_for_each_entry(ln, &lr->line_list, list) { | |
146a1439 MH |
388 | while (ln->line > l && ret >= 0) |
389 | ret = show_one_line(fp, (l++) - lr->offset, | |
390 | false, false); | |
391 | if (ret >= 0) | |
392 | ret = show_one_line(fp, (l++) - lr->offset, | |
393 | false, true); | |
394 | if (ret < 0) | |
395 | goto end; | |
4b4da7f7 MH |
396 | } |
397 | ||
398 | if (lr->end == INT_MAX) | |
399 | lr->end = l + NR_ADDITIONAL_LINES; | |
dda4ab34 | 400 | while (l <= lr->end && !feof(fp) && ret >= 0) |
146a1439 MH |
401 | ret = show_one_line(fp, (l++) - lr->offset, false, false); |
402 | end: | |
4b4da7f7 | 403 | fclose(fp); |
146a1439 | 404 | return ret; |
4b4da7f7 MH |
405 | } |
406 | ||
cf6eb489 | 407 | static int show_available_vars_at(int fd, struct perf_probe_event *pev, |
fb8c5a56 | 408 | int max_vls, bool externs) |
cf6eb489 MH |
409 | { |
410 | char *buf; | |
411 | int ret, i; | |
412 | struct str_node *node; | |
413 | struct variable_list *vls = NULL, *vl; | |
414 | ||
415 | buf = synthesize_perf_probe_point(&pev->point); | |
416 | if (!buf) | |
417 | return -EINVAL; | |
418 | pr_debug("Searching variables at %s\n", buf); | |
419 | ||
fb8c5a56 | 420 | ret = find_available_vars_at(fd, pev, &vls, max_vls, externs); |
cf6eb489 MH |
421 | if (ret > 0) { |
422 | /* Some variables were found */ | |
423 | fprintf(stdout, "Available variables at %s\n", buf); | |
424 | for (i = 0; i < ret; i++) { | |
425 | vl = &vls[i]; | |
426 | /* | |
427 | * A probe point might be converted to | |
428 | * several trace points. | |
429 | */ | |
430 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
431 | vl->point.offset); | |
432 | free(vl->point.symbol); | |
433 | if (vl->vars) { | |
434 | strlist__for_each(node, vl->vars) | |
435 | fprintf(stdout, "\t\t%s\n", node->s); | |
436 | strlist__delete(vl->vars); | |
437 | } else | |
438 | fprintf(stdout, "(No variables)\n"); | |
439 | } | |
440 | free(vls); | |
441 | } else | |
442 | pr_err("Failed to find variables at %s (%d)\n", buf, ret); | |
443 | ||
444 | free(buf); | |
445 | return ret; | |
446 | } | |
447 | ||
448 | /* Show available variables on given probe point */ | |
449 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
469b9b88 | 450 | int max_vls, const char *module, bool externs) |
cf6eb489 MH |
451 | { |
452 | int i, fd, ret = 0; | |
453 | ||
454 | ret = init_vmlinux(); | |
455 | if (ret < 0) | |
456 | return ret; | |
457 | ||
469b9b88 | 458 | fd = open_vmlinux(module); |
cf6eb489 MH |
459 | if (fd < 0) { |
460 | pr_warning("Failed to open debuginfo file.\n"); | |
461 | return fd; | |
462 | } | |
463 | ||
464 | setup_pager(); | |
465 | ||
466 | for (i = 0; i < npevs && ret >= 0; i++) | |
fb8c5a56 | 467 | ret = show_available_vars_at(fd, &pevs[i], max_vls, externs); |
cf6eb489 MH |
468 | |
469 | close(fd); | |
470 | return ret; | |
471 | } | |
472 | ||
4b4da7f7 MH |
473 | #else /* !DWARF_SUPPORT */ |
474 | ||
0e60836b | 475 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, |
469b9b88 | 476 | struct perf_probe_point *pp) |
4b4da7f7 | 477 | { |
469b9b88 MH |
478 | struct symbol *sym; |
479 | ||
480 | sym = __find_kernel_function_by_name(tp->symbol, NULL); | |
481 | if (!sym) { | |
482 | pr_err("Failed to find symbol %s in kernel.\n", tp->symbol); | |
483 | return -ENOENT; | |
484 | } | |
02b95dad MH |
485 | pp->function = strdup(tp->symbol); |
486 | if (pp->function == NULL) | |
487 | return -ENOMEM; | |
4b4da7f7 MH |
488 | pp->offset = tp->offset; |
489 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
490 | |
491 | return 0; | |
4b4da7f7 MH |
492 | } |
493 | ||
0e60836b SD |
494 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
495 | struct probe_trace_event **tevs __unused, | |
469b9b88 | 496 | int max_tevs __unused, const char *mod __unused) |
4b4da7f7 | 497 | { |
146a1439 MH |
498 | if (perf_probe_event_need_dwarf(pev)) { |
499 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
500 | return -ENOSYS; | |
501 | } | |
4b4da7f7 MH |
502 | return 0; |
503 | } | |
504 | ||
469b9b88 | 505 | int show_line_range(struct line_range *lr __unused, const char *module __unused) |
4b4da7f7 | 506 | { |
146a1439 MH |
507 | pr_warning("Debuginfo-analysis is not supported.\n"); |
508 | return -ENOSYS; | |
4b4da7f7 MH |
509 | } |
510 | ||
cf6eb489 | 511 | int show_available_vars(struct perf_probe_event *pevs __unused, |
469b9b88 MH |
512 | int npevs __unused, int max_vls __unused, |
513 | const char *module __unused, bool externs __unused) | |
cf6eb489 MH |
514 | { |
515 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
516 | return -ENOSYS; | |
517 | } | |
e0faa8d3 MH |
518 | #endif |
519 | ||
146a1439 | 520 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def MH |
521 | { |
522 | const char *ptr; | |
523 | char *tmp; | |
524 | /* | |
525 | * <Syntax> | |
526 | * SRC:SLN[+NUM|-ELN] | |
527 | * FUNC[:SLN[+NUM|-ELN]] | |
528 | */ | |
529 | ptr = strchr(arg, ':'); | |
530 | if (ptr) { | |
d3b63d7a | 531 | lr->start = (int)strtoul(ptr + 1, &tmp, 0); |
dda4ab34 | 532 | if (*tmp == '+') { |
d3b63d7a | 533 | lr->end = lr->start + (int)strtoul(tmp + 1, &tmp, 0); |
dda4ab34 MH |
534 | lr->end--; /* |
535 | * Adjust the number of lines here. | |
536 | * If the number of lines == 1, the | |
537 | * the end of line should be equal to | |
538 | * the start of line. | |
539 | */ | |
540 | } else if (*tmp == '-') | |
d3b63d7a | 541 | lr->end = (int)strtoul(tmp + 1, &tmp, 0); |
631c9def | 542 | else |
d3b63d7a MH |
543 | lr->end = INT_MAX; |
544 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); | |
545 | if (lr->start > lr->end) { | |
631c9def | 546 | semantic_error("Start line must be smaller" |
146a1439 MH |
547 | " than end line.\n"); |
548 | return -EINVAL; | |
549 | } | |
550 | if (*tmp != '\0') { | |
551 | semantic_error("Tailing with invalid character '%d'.\n", | |
631c9def | 552 | *tmp); |
146a1439 MH |
553 | return -EINVAL; |
554 | } | |
02b95dad | 555 | tmp = strndup(arg, (ptr - arg)); |
d3b63d7a | 556 | } else { |
02b95dad | 557 | tmp = strdup(arg); |
d3b63d7a MH |
558 | lr->end = INT_MAX; |
559 | } | |
02b95dad MH |
560 | |
561 | if (tmp == NULL) | |
562 | return -ENOMEM; | |
631c9def MH |
563 | |
564 | if (strchr(tmp, '.')) | |
565 | lr->file = tmp; | |
566 | else | |
567 | lr->function = tmp; | |
146a1439 MH |
568 | |
569 | return 0; | |
631c9def MH |
570 | } |
571 | ||
b7702a21 MH |
572 | /* Check the name is good for event/group */ |
573 | static bool check_event_name(const char *name) | |
574 | { | |
575 | if (!isalpha(*name) && *name != '_') | |
576 | return false; | |
577 | while (*++name != '\0') { | |
578 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
579 | return false; | |
580 | } | |
581 | return true; | |
582 | } | |
583 | ||
50656eec | 584 | /* Parse probepoint definition. */ |
146a1439 | 585 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 586 | { |
4235b045 | 587 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
588 | char *ptr, *tmp; |
589 | char c, nc = 0; | |
590 | /* | |
591 | * <Syntax> | |
2a9c8c36 MH |
592 | * perf probe [EVENT=]SRC[:LN|;PTN] |
593 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
594 | * |
595 | * TODO:Group name support | |
50656eec MH |
596 | */ |
597 | ||
2a9c8c36 MH |
598 | ptr = strpbrk(arg, ";=@+%"); |
599 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
600 | *ptr = '\0'; |
601 | tmp = ptr + 1; | |
146a1439 MH |
602 | if (strchr(arg, ':')) { |
603 | semantic_error("Group name is not supported yet.\n"); | |
604 | return -ENOTSUP; | |
605 | } | |
606 | if (!check_event_name(arg)) { | |
b7702a21 | 607 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
608 | "follow C symbol-naming rule.\n", arg); |
609 | return -EINVAL; | |
610 | } | |
02b95dad MH |
611 | pev->event = strdup(arg); |
612 | if (pev->event == NULL) | |
613 | return -ENOMEM; | |
4235b045 | 614 | pev->group = NULL; |
af663d75 MH |
615 | arg = tmp; |
616 | } | |
617 | ||
2a9c8c36 | 618 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
619 | if (ptr) { |
620 | nc = *ptr; | |
621 | *ptr++ = '\0'; | |
622 | } | |
623 | ||
02b95dad MH |
624 | tmp = strdup(arg); |
625 | if (tmp == NULL) | |
626 | return -ENOMEM; | |
627 | ||
50656eec | 628 | /* Check arg is function or file and copy it */ |
02b95dad MH |
629 | if (strchr(tmp, '.')) /* File */ |
630 | pp->file = tmp; | |
50656eec | 631 | else /* Function */ |
02b95dad | 632 | pp->function = tmp; |
50656eec MH |
633 | |
634 | /* Parse other options */ | |
635 | while (ptr) { | |
636 | arg = ptr; | |
637 | c = nc; | |
2a9c8c36 | 638 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
639 | pp->lazy_line = strdup(arg); |
640 | if (pp->lazy_line == NULL) | |
641 | return -ENOMEM; | |
2a9c8c36 MH |
642 | break; |
643 | } | |
644 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
645 | if (ptr) { |
646 | nc = *ptr; | |
647 | *ptr++ = '\0'; | |
648 | } | |
649 | switch (c) { | |
650 | case ':': /* Line number */ | |
651 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 652 | if (*tmp != '\0') { |
2a9c8c36 | 653 | semantic_error("There is non-digit char" |
146a1439 MH |
654 | " in line number.\n"); |
655 | return -EINVAL; | |
656 | } | |
50656eec MH |
657 | break; |
658 | case '+': /* Byte offset from a symbol */ | |
659 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 660 | if (*tmp != '\0') { |
2a9c8c36 | 661 | semantic_error("There is non-digit character" |
146a1439 MH |
662 | " in offset.\n"); |
663 | return -EINVAL; | |
664 | } | |
50656eec MH |
665 | break; |
666 | case '@': /* File name */ | |
146a1439 MH |
667 | if (pp->file) { |
668 | semantic_error("SRC@SRC is not allowed.\n"); | |
669 | return -EINVAL; | |
670 | } | |
02b95dad MH |
671 | pp->file = strdup(arg); |
672 | if (pp->file == NULL) | |
673 | return -ENOMEM; | |
50656eec MH |
674 | break; |
675 | case '%': /* Probe places */ | |
676 | if (strcmp(arg, "return") == 0) { | |
677 | pp->retprobe = 1; | |
146a1439 MH |
678 | } else { /* Others not supported yet */ |
679 | semantic_error("%%%s is not supported.\n", arg); | |
680 | return -ENOTSUP; | |
681 | } | |
50656eec | 682 | break; |
146a1439 MH |
683 | default: /* Buggy case */ |
684 | pr_err("This program has a bug at %s:%d.\n", | |
685 | __FILE__, __LINE__); | |
686 | return -ENOTSUP; | |
50656eec MH |
687 | break; |
688 | } | |
689 | } | |
690 | ||
691 | /* Exclusion check */ | |
146a1439 | 692 | if (pp->lazy_line && pp->line) { |
2a9c8c36 | 693 | semantic_error("Lazy pattern can't be used with line number."); |
146a1439 MH |
694 | return -EINVAL; |
695 | } | |
2a9c8c36 | 696 | |
146a1439 | 697 | if (pp->lazy_line && pp->offset) { |
2a9c8c36 | 698 | semantic_error("Lazy pattern can't be used with offset."); |
146a1439 MH |
699 | return -EINVAL; |
700 | } | |
2a9c8c36 | 701 | |
146a1439 | 702 | if (pp->line && pp->offset) { |
50656eec | 703 | semantic_error("Offset can't be used with line number."); |
146a1439 MH |
704 | return -EINVAL; |
705 | } | |
50656eec | 706 | |
146a1439 | 707 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 MH |
708 | semantic_error("File always requires line number or " |
709 | "lazy pattern."); | |
146a1439 MH |
710 | return -EINVAL; |
711 | } | |
50656eec | 712 | |
146a1439 | 713 | if (pp->offset && !pp->function) { |
50656eec | 714 | semantic_error("Offset requires an entry function."); |
146a1439 MH |
715 | return -EINVAL; |
716 | } | |
50656eec | 717 | |
146a1439 | 718 | if (pp->retprobe && !pp->function) { |
50656eec | 719 | semantic_error("Return probe requires an entry function."); |
146a1439 MH |
720 | return -EINVAL; |
721 | } | |
50656eec | 722 | |
146a1439 | 723 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 MH |
724 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
725 | "return probe."); | |
146a1439 MH |
726 | return -EINVAL; |
727 | } | |
50656eec | 728 | |
4235b045 | 729 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
730 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
731 | pp->lazy_line); | |
146a1439 | 732 | return 0; |
50656eec MH |
733 | } |
734 | ||
7df2f329 | 735 | /* Parse perf-probe event argument */ |
146a1439 | 736 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 737 | { |
b2a3c12b | 738 | char *tmp, *goodname; |
7df2f329 MH |
739 | struct perf_probe_arg_field **fieldp; |
740 | ||
741 | pr_debug("parsing arg: %s into ", str); | |
742 | ||
48481938 MH |
743 | tmp = strchr(str, '='); |
744 | if (tmp) { | |
02b95dad MH |
745 | arg->name = strndup(str, tmp - str); |
746 | if (arg->name == NULL) | |
747 | return -ENOMEM; | |
11a1ca35 | 748 | pr_debug("name:%s ", arg->name); |
48481938 MH |
749 | str = tmp + 1; |
750 | } | |
751 | ||
11a1ca35 MH |
752 | tmp = strchr(str, ':'); |
753 | if (tmp) { /* Type setting */ | |
754 | *tmp = '\0'; | |
02b95dad MH |
755 | arg->type = strdup(tmp + 1); |
756 | if (arg->type == NULL) | |
757 | return -ENOMEM; | |
11a1ca35 MH |
758 | pr_debug("type:%s ", arg->type); |
759 | } | |
760 | ||
b2a3c12b | 761 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
762 | if (!is_c_varname(str) || !tmp) { |
763 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
764 | arg->var = strdup(str); |
765 | if (arg->var == NULL) | |
766 | return -ENOMEM; | |
48481938 | 767 | pr_debug("%s\n", arg->var); |
146a1439 | 768 | return 0; |
7df2f329 MH |
769 | } |
770 | ||
b2a3c12b | 771 | /* Structure fields or array element */ |
02b95dad MH |
772 | arg->var = strndup(str, tmp - str); |
773 | if (arg->var == NULL) | |
774 | return -ENOMEM; | |
b2a3c12b | 775 | goodname = arg->var; |
48481938 | 776 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
777 | fieldp = &arg->field; |
778 | ||
779 | do { | |
e334016f MH |
780 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
781 | if (*fieldp == NULL) | |
782 | return -ENOMEM; | |
b2a3c12b MH |
783 | if (*tmp == '[') { /* Array */ |
784 | str = tmp; | |
785 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 786 | (*fieldp)->ref = true; |
b2a3c12b MH |
787 | if (*tmp != ']' || tmp == str + 1) { |
788 | semantic_error("Array index must be a" | |
789 | " number.\n"); | |
790 | return -EINVAL; | |
791 | } | |
792 | tmp++; | |
793 | if (*tmp == '\0') | |
794 | tmp = NULL; | |
795 | } else { /* Structure */ | |
796 | if (*tmp == '.') { | |
797 | str = tmp + 1; | |
798 | (*fieldp)->ref = false; | |
799 | } else if (tmp[1] == '>') { | |
800 | str = tmp + 2; | |
801 | (*fieldp)->ref = true; | |
802 | } else { | |
803 | semantic_error("Argument parse error: %s\n", | |
804 | str); | |
805 | return -EINVAL; | |
806 | } | |
807 | tmp = strpbrk(str, "-.["); | |
146a1439 | 808 | } |
7df2f329 | 809 | if (tmp) { |
02b95dad MH |
810 | (*fieldp)->name = strndup(str, tmp - str); |
811 | if ((*fieldp)->name == NULL) | |
812 | return -ENOMEM; | |
b2a3c12b MH |
813 | if (*str != '[') |
814 | goodname = (*fieldp)->name; | |
7df2f329 MH |
815 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
816 | fieldp = &(*fieldp)->next; | |
817 | } | |
818 | } while (tmp); | |
02b95dad MH |
819 | (*fieldp)->name = strdup(str); |
820 | if ((*fieldp)->name == NULL) | |
821 | return -ENOMEM; | |
b2a3c12b MH |
822 | if (*str != '[') |
823 | goodname = (*fieldp)->name; | |
7df2f329 | 824 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 825 | |
b2a3c12b | 826 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 827 | if (!arg->name) { |
b2a3c12b | 828 | arg->name = strdup(goodname); |
02b95dad MH |
829 | if (arg->name == NULL) |
830 | return -ENOMEM; | |
831 | } | |
146a1439 | 832 | return 0; |
7df2f329 MH |
833 | } |
834 | ||
4235b045 | 835 | /* Parse perf-probe event command */ |
146a1439 | 836 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 837 | { |
e1c01d61 | 838 | char **argv; |
146a1439 | 839 | int argc, i, ret = 0; |
fac13fd5 | 840 | |
4235b045 | 841 | argv = argv_split(cmd, &argc); |
146a1439 MH |
842 | if (!argv) { |
843 | pr_debug("Failed to split arguments.\n"); | |
844 | return -ENOMEM; | |
845 | } | |
846 | if (argc - 1 > MAX_PROBE_ARGS) { | |
847 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
848 | ret = -ERANGE; | |
849 | goto out; | |
850 | } | |
50656eec | 851 | /* Parse probe point */ |
146a1439 MH |
852 | ret = parse_perf_probe_point(argv[0], pev); |
853 | if (ret < 0) | |
854 | goto out; | |
50656eec | 855 | |
e1c01d61 | 856 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 857 | pev->nargs = argc - 1; |
e334016f MH |
858 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
859 | if (pev->args == NULL) { | |
860 | ret = -ENOMEM; | |
861 | goto out; | |
862 | } | |
146a1439 MH |
863 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
864 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
865 | if (ret >= 0 && | |
866 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 867 | semantic_error("You can't specify local variable for" |
146a1439 MH |
868 | " kretprobe.\n"); |
869 | ret = -EINVAL; | |
870 | } | |
e1c01d61 | 871 | } |
146a1439 | 872 | out: |
e1c01d61 | 873 | argv_free(argv); |
146a1439 MH |
874 | |
875 | return ret; | |
50656eec MH |
876 | } |
877 | ||
4235b045 MH |
878 | /* Return true if this perf_probe_event requires debuginfo */ |
879 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
880 | { | |
881 | int i; | |
882 | ||
883 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
884 | return true; | |
885 | ||
886 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 887 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
888 | return true; |
889 | ||
890 | return false; | |
891 | } | |
892 | ||
0e60836b SD |
893 | /* Parse probe_events event into struct probe_point */ |
894 | static int parse_probe_trace_command(const char *cmd, | |
895 | struct probe_trace_event *tev) | |
4de189fe | 896 | { |
0e60836b | 897 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
898 | char pr; |
899 | char *p; | |
900 | int ret, i, argc; | |
901 | char **argv; | |
902 | ||
0e60836b | 903 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 904 | argv = argv_split(cmd, &argc); |
146a1439 MH |
905 | if (!argv) { |
906 | pr_debug("Failed to split arguments.\n"); | |
907 | return -ENOMEM; | |
908 | } | |
909 | if (argc < 2) { | |
910 | semantic_error("Too few probe arguments.\n"); | |
911 | ret = -ERANGE; | |
912 | goto out; | |
913 | } | |
4de189fe MH |
914 | |
915 | /* Scan event and group name. */ | |
93aaa45a | 916 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
917 | &pr, (float *)(void *)&tev->group, |
918 | (float *)(void *)&tev->event); | |
146a1439 MH |
919 | if (ret != 3) { |
920 | semantic_error("Failed to parse event name: %s\n", argv[0]); | |
921 | ret = -EINVAL; | |
922 | goto out; | |
923 | } | |
4235b045 | 924 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 925 | |
4235b045 | 926 | tp->retprobe = (pr == 'r'); |
4de189fe MH |
927 | |
928 | /* Scan function name and offset */ | |
4235b045 MH |
929 | ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol, |
930 | &tp->offset); | |
4de189fe | 931 | if (ret == 1) |
4235b045 | 932 | tp->offset = 0; |
4de189fe | 933 | |
4235b045 | 934 | tev->nargs = argc - 2; |
0e60836b | 935 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
936 | if (tev->args == NULL) { |
937 | ret = -ENOMEM; | |
938 | goto out; | |
939 | } | |
4235b045 | 940 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
941 | p = strchr(argv[i + 2], '='); |
942 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
943 | *p++ = '\0'; |
944 | else | |
945 | p = argv[i + 2]; | |
02b95dad | 946 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 947 | /* TODO: parse regs and offset */ |
02b95dad MH |
948 | tev->args[i].value = strdup(p); |
949 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
950 | ret = -ENOMEM; | |
951 | goto out; | |
952 | } | |
4de189fe | 953 | } |
146a1439 MH |
954 | ret = 0; |
955 | out: | |
4de189fe | 956 | argv_free(argv); |
146a1439 | 957 | return ret; |
4de189fe MH |
958 | } |
959 | ||
7df2f329 MH |
960 | /* Compose only probe arg */ |
961 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
962 | { | |
963 | struct perf_probe_arg_field *field = pa->field; | |
964 | int ret; | |
965 | char *tmp = buf; | |
966 | ||
48481938 MH |
967 | if (pa->name && pa->var) |
968 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
969 | else | |
970 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
971 | if (ret <= 0) |
972 | goto error; | |
973 | tmp += ret; | |
974 | len -= ret; | |
975 | ||
976 | while (field) { | |
b2a3c12b MH |
977 | if (field->name[0] == '[') |
978 | ret = e_snprintf(tmp, len, "%s", field->name); | |
979 | else | |
980 | ret = e_snprintf(tmp, len, "%s%s", | |
981 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
982 | if (ret <= 0) |
983 | goto error; | |
984 | tmp += ret; | |
985 | len -= ret; | |
986 | field = field->next; | |
987 | } | |
11a1ca35 MH |
988 | |
989 | if (pa->type) { | |
990 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
991 | if (ret <= 0) | |
992 | goto error; | |
993 | tmp += ret; | |
994 | len -= ret; | |
995 | } | |
996 | ||
7df2f329 MH |
997 | return tmp - buf; |
998 | error: | |
146a1439 MH |
999 | pr_debug("Failed to synthesize perf probe argument: %s", |
1000 | strerror(-ret)); | |
1001 | return ret; | |
7df2f329 MH |
1002 | } |
1003 | ||
4235b045 MH |
1004 | /* Compose only probe point (not argument) */ |
1005 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1006 | { |
fb1587d8 MH |
1007 | char *buf, *tmp; |
1008 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1009 | int ret, len; | |
4de189fe | 1010 | |
e334016f MH |
1011 | buf = zalloc(MAX_CMDLEN); |
1012 | if (buf == NULL) { | |
1013 | ret = -ENOMEM; | |
1014 | goto error; | |
1015 | } | |
4de189fe | 1016 | if (pp->offset) { |
fb1587d8 | 1017 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1018 | if (ret <= 0) |
1019 | goto error; | |
1020 | } | |
1021 | if (pp->line) { | |
fb1587d8 MH |
1022 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1023 | if (ret <= 0) | |
1024 | goto error; | |
1025 | } | |
1026 | if (pp->file) { | |
dd259c5d | 1027 | len = strlen(pp->file) - 31; |
fb1587d8 MH |
1028 | if (len < 0) |
1029 | len = 0; | |
1030 | tmp = strchr(pp->file + len, '/'); | |
1031 | if (!tmp) | |
dd259c5d | 1032 | tmp = pp->file + len; |
fb1587d8 | 1033 | ret = e_snprintf(file, 32, "@%s", tmp + 1); |
4de189fe MH |
1034 | if (ret <= 0) |
1035 | goto error; | |
1036 | } | |
1037 | ||
1038 | if (pp->function) | |
fb1587d8 MH |
1039 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1040 | offs, pp->retprobe ? "%return" : "", line, | |
1041 | file); | |
4de189fe | 1042 | else |
fb1587d8 | 1043 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1044 | if (ret <= 0) |
1045 | goto error; | |
1046 | ||
1047 | return buf; | |
7ef17aaf | 1048 | error: |
146a1439 MH |
1049 | pr_debug("Failed to synthesize perf probe point: %s", |
1050 | strerror(-ret)); | |
e334016f MH |
1051 | if (buf) |
1052 | free(buf); | |
146a1439 | 1053 | return NULL; |
7ef17aaf MH |
1054 | } |
1055 | ||
4235b045 MH |
1056 | #if 0 |
1057 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1058 | { |
1059 | char *buf; | |
1060 | int i, len, ret; | |
1061 | ||
4235b045 MH |
1062 | buf = synthesize_perf_probe_point(&pev->point); |
1063 | if (!buf) | |
1064 | return NULL; | |
4de189fe | 1065 | |
4235b045 MH |
1066 | len = strlen(buf); |
1067 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1068 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1069 | pev->args[i].name); |
1070 | if (ret <= 0) { | |
1071 | free(buf); | |
1072 | return NULL; | |
1073 | } | |
4de189fe MH |
1074 | len += ret; |
1075 | } | |
4de189fe | 1076 | |
4235b045 MH |
1077 | return buf; |
1078 | } | |
1079 | #endif | |
1080 | ||
0e60836b | 1081 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1082 | char **buf, size_t *buflen, |
1083 | int depth) | |
1084 | { | |
1085 | int ret; | |
1086 | if (ref->next) { | |
0e60836b | 1087 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1088 | buflen, depth + 1); |
1089 | if (depth < 0) | |
1090 | goto out; | |
1091 | } | |
1092 | ||
1093 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1094 | if (ret < 0) | |
1095 | depth = ret; | |
1096 | else { | |
1097 | *buf += ret; | |
1098 | *buflen -= ret; | |
1099 | } | |
1100 | out: | |
1101 | return depth; | |
4de189fe | 1102 | |
4de189fe MH |
1103 | } |
1104 | ||
0e60836b | 1105 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1106 | char *buf, size_t buflen) |
50656eec | 1107 | { |
0e60836b | 1108 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1109 | int ret, depth = 0; |
1110 | char *tmp = buf; | |
1111 | ||
1112 | /* Argument name or separator */ | |
1113 | if (arg->name) | |
1114 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1115 | else | |
1116 | ret = e_snprintf(buf, buflen, " "); | |
1117 | if (ret < 0) | |
1118 | return ret; | |
1119 | buf += ret; | |
1120 | buflen -= ret; | |
1121 | ||
b7dcb857 MH |
1122 | /* Special case: @XXX */ |
1123 | if (arg->value[0] == '@' && arg->ref) | |
1124 | ref = ref->next; | |
1125 | ||
4235b045 | 1126 | /* Dereferencing arguments */ |
b7dcb857 | 1127 | if (ref) { |
0e60836b | 1128 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1129 | &buflen, 1); |
1130 | if (depth < 0) | |
1131 | return depth; | |
1132 | } | |
1133 | ||
1134 | /* Print argument value */ | |
b7dcb857 MH |
1135 | if (arg->value[0] == '@' && arg->ref) |
1136 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1137 | arg->ref->offset); | |
1138 | else | |
1139 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1140 | if (ret < 0) |
1141 | return ret; | |
1142 | buf += ret; | |
1143 | buflen -= ret; | |
1144 | ||
1145 | /* Closing */ | |
1146 | while (depth--) { | |
1147 | ret = e_snprintf(buf, buflen, ")"); | |
1148 | if (ret < 0) | |
1149 | return ret; | |
1150 | buf += ret; | |
1151 | buflen -= ret; | |
1152 | } | |
4984912e MH |
1153 | /* Print argument type */ |
1154 | if (arg->type) { | |
1155 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1156 | if (ret <= 0) | |
1157 | return ret; | |
1158 | buf += ret; | |
1159 | } | |
4235b045 MH |
1160 | |
1161 | return buf - tmp; | |
1162 | } | |
1163 | ||
0e60836b | 1164 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1165 | { |
0e60836b | 1166 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1167 | char *buf; |
1168 | int i, len, ret; | |
1169 | ||
e334016f MH |
1170 | buf = zalloc(MAX_CMDLEN); |
1171 | if (buf == NULL) | |
1172 | return NULL; | |
1173 | ||
4235b045 MH |
1174 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu", |
1175 | tp->retprobe ? 'r' : 'p', | |
1176 | tev->group, tev->event, | |
1177 | tp->symbol, tp->offset); | |
1178 | if (len <= 0) | |
50656eec | 1179 | goto error; |
50656eec | 1180 | |
4235b045 | 1181 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1182 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1183 | MAX_CMDLEN - len); |
4de189fe | 1184 | if (ret <= 0) |
50656eec MH |
1185 | goto error; |
1186 | len += ret; | |
1187 | } | |
50656eec | 1188 | |
4235b045 | 1189 | return buf; |
50656eec | 1190 | error: |
4235b045 MH |
1191 | free(buf); |
1192 | return NULL; | |
1193 | } | |
50656eec | 1194 | |
0e60836b | 1195 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
469b9b88 | 1196 | struct perf_probe_event *pev) |
4235b045 | 1197 | { |
02b95dad | 1198 | char buf[64] = ""; |
146a1439 | 1199 | int i, ret; |
4235b045 | 1200 | |
4b4da7f7 | 1201 | /* Convert event/group name */ |
02b95dad MH |
1202 | pev->event = strdup(tev->event); |
1203 | pev->group = strdup(tev->group); | |
1204 | if (pev->event == NULL || pev->group == NULL) | |
1205 | return -ENOMEM; | |
fb1587d8 | 1206 | |
4b4da7f7 | 1207 | /* Convert trace_point to probe_point */ |
0e60836b | 1208 | ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); |
146a1439 MH |
1209 | if (ret < 0) |
1210 | return ret; | |
4b4da7f7 | 1211 | |
4235b045 MH |
1212 | /* Convert trace_arg to probe_arg */ |
1213 | pev->nargs = tev->nargs; | |
e334016f MH |
1214 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1215 | if (pev->args == NULL) | |
1216 | return -ENOMEM; | |
02b95dad | 1217 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1218 | if (tev->args[i].name) |
02b95dad | 1219 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1220 | else { |
0e60836b | 1221 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1222 | buf, 64); |
02b95dad | 1223 | pev->args[i].name = strdup(buf); |
4235b045 | 1224 | } |
02b95dad MH |
1225 | if (pev->args[i].name == NULL && ret >= 0) |
1226 | ret = -ENOMEM; | |
1227 | } | |
146a1439 MH |
1228 | |
1229 | if (ret < 0) | |
1230 | clear_perf_probe_event(pev); | |
1231 | ||
1232 | return ret; | |
4235b045 MH |
1233 | } |
1234 | ||
1235 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1236 | { | |
1237 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1238 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1239 | int i; |
1240 | ||
1241 | if (pev->event) | |
1242 | free(pev->event); | |
1243 | if (pev->group) | |
1244 | free(pev->group); | |
1245 | if (pp->file) | |
1246 | free(pp->file); | |
1247 | if (pp->function) | |
1248 | free(pp->function); | |
1249 | if (pp->lazy_line) | |
1250 | free(pp->lazy_line); | |
7df2f329 | 1251 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1252 | if (pev->args[i].name) |
1253 | free(pev->args[i].name); | |
48481938 MH |
1254 | if (pev->args[i].var) |
1255 | free(pev->args[i].var); | |
11a1ca35 MH |
1256 | if (pev->args[i].type) |
1257 | free(pev->args[i].type); | |
7df2f329 MH |
1258 | field = pev->args[i].field; |
1259 | while (field) { | |
1260 | next = field->next; | |
1261 | if (field->name) | |
1262 | free(field->name); | |
1263 | free(field); | |
1264 | field = next; | |
1265 | } | |
1266 | } | |
4235b045 MH |
1267 | if (pev->args) |
1268 | free(pev->args); | |
1269 | memset(pev, 0, sizeof(*pev)); | |
1270 | } | |
1271 | ||
0e60836b | 1272 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1273 | { |
0e60836b | 1274 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1275 | int i; |
1276 | ||
1277 | if (tev->event) | |
1278 | free(tev->event); | |
1279 | if (tev->group) | |
1280 | free(tev->group); | |
1281 | if (tev->point.symbol) | |
1282 | free(tev->point.symbol); | |
1283 | for (i = 0; i < tev->nargs; i++) { | |
1284 | if (tev->args[i].name) | |
1285 | free(tev->args[i].name); | |
1286 | if (tev->args[i].value) | |
1287 | free(tev->args[i].value); | |
4984912e MH |
1288 | if (tev->args[i].type) |
1289 | free(tev->args[i].type); | |
4235b045 MH |
1290 | ref = tev->args[i].ref; |
1291 | while (ref) { | |
1292 | next = ref->next; | |
1293 | free(ref); | |
1294 | ref = next; | |
1295 | } | |
1296 | } | |
1297 | if (tev->args) | |
1298 | free(tev->args); | |
1299 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1300 | } |
1301 | ||
f4d7da49 | 1302 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
1303 | { |
1304 | char buf[PATH_MAX]; | |
7ca5989d | 1305 | const char *__debugfs; |
4de189fe MH |
1306 | int ret; |
1307 | ||
7ca5989d MH |
1308 | __debugfs = debugfs_find_mountpoint(); |
1309 | if (__debugfs == NULL) { | |
1310 | pr_warning("Debugfs is not mounted.\n"); | |
1311 | return -ENOENT; | |
1312 | } | |
1313 | ||
1314 | ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); | |
146a1439 | 1315 | if (ret >= 0) { |
7ca5989d | 1316 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1317 | if (readwrite && !probe_event_dry_run) |
1318 | ret = open(buf, O_RDWR, O_APPEND); | |
1319 | else | |
1320 | ret = open(buf, O_RDONLY, 0); | |
1321 | } | |
f4d7da49 | 1322 | |
4de189fe MH |
1323 | if (ret < 0) { |
1324 | if (errno == ENOENT) | |
146a1439 MH |
1325 | pr_warning("kprobe_events file does not exist - please" |
1326 | " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); | |
4de189fe | 1327 | else |
146a1439 MH |
1328 | pr_warning("Failed to open kprobe_events file: %s\n", |
1329 | strerror(errno)); | |
4de189fe MH |
1330 | } |
1331 | return ret; | |
1332 | } | |
1333 | ||
1334 | /* Get raw string list of current kprobe_events */ | |
0e60836b | 1335 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1336 | { |
1337 | int ret, idx; | |
1338 | FILE *fp; | |
1339 | char buf[MAX_CMDLEN]; | |
1340 | char *p; | |
1341 | struct strlist *sl; | |
1342 | ||
1343 | sl = strlist__new(true, NULL); | |
1344 | ||
1345 | fp = fdopen(dup(fd), "r"); | |
1346 | while (!feof(fp)) { | |
1347 | p = fgets(buf, MAX_CMDLEN, fp); | |
1348 | if (!p) | |
1349 | break; | |
1350 | ||
1351 | idx = strlen(p) - 1; | |
1352 | if (p[idx] == '\n') | |
1353 | p[idx] = '\0'; | |
1354 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1355 | if (ret < 0) { |
1356 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1357 | strlist__delete(sl); | |
1358 | return NULL; | |
1359 | } | |
4de189fe MH |
1360 | } |
1361 | fclose(fp); | |
1362 | ||
1363 | return sl; | |
1364 | } | |
1365 | ||
278498d4 | 1366 | /* Show an event */ |
146a1439 | 1367 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1368 | { |
7e990a51 | 1369 | int i, ret; |
278498d4 | 1370 | char buf[128]; |
4235b045 | 1371 | char *place; |
278498d4 | 1372 | |
4235b045 MH |
1373 | /* Synthesize only event probe point */ |
1374 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1375 | if (!place) |
1376 | return -EINVAL; | |
4235b045 MH |
1377 | |
1378 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1379 | if (ret < 0) |
146a1439 MH |
1380 | return ret; |
1381 | ||
fb1587d8 | 1382 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1383 | |
4235b045 | 1384 | if (pev->nargs > 0) { |
278498d4 | 1385 | printf(" with"); |
7df2f329 | 1386 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1387 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1388 | buf, 128); | |
1389 | if (ret < 0) | |
1390 | break; | |
7df2f329 MH |
1391 | printf(" %s", buf); |
1392 | } | |
278498d4 MH |
1393 | } |
1394 | printf(")\n"); | |
4235b045 | 1395 | free(place); |
146a1439 | 1396 | return ret; |
278498d4 MH |
1397 | } |
1398 | ||
4de189fe | 1399 | /* List up current perf-probe events */ |
146a1439 | 1400 | int show_perf_probe_events(void) |
4de189fe | 1401 | { |
146a1439 | 1402 | int fd, ret; |
0e60836b | 1403 | struct probe_trace_event tev; |
4235b045 | 1404 | struct perf_probe_event pev; |
4de189fe MH |
1405 | struct strlist *rawlist; |
1406 | struct str_node *ent; | |
1407 | ||
72041334 | 1408 | setup_pager(); |
146a1439 MH |
1409 | ret = init_vmlinux(); |
1410 | if (ret < 0) | |
1411 | return ret; | |
4235b045 MH |
1412 | |
1413 | memset(&tev, 0, sizeof(tev)); | |
1414 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1415 | |
f4d7da49 | 1416 | fd = open_kprobe_events(false); |
146a1439 MH |
1417 | if (fd < 0) |
1418 | return fd; | |
1419 | ||
0e60836b | 1420 | rawlist = get_probe_trace_command_rawlist(fd); |
4de189fe | 1421 | close(fd); |
146a1439 MH |
1422 | if (!rawlist) |
1423 | return -ENOENT; | |
4de189fe | 1424 | |
adf365f4 | 1425 | strlist__for_each(ent, rawlist) { |
0e60836b | 1426 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1427 | if (ret >= 0) { |
1428 | ret = convert_to_perf_probe_event(&tev, &pev); | |
1429 | if (ret >= 0) | |
1430 | ret = show_perf_probe_event(&pev); | |
1431 | } | |
4235b045 | 1432 | clear_perf_probe_event(&pev); |
0e60836b | 1433 | clear_probe_trace_event(&tev); |
146a1439 MH |
1434 | if (ret < 0) |
1435 | break; | |
4de189fe | 1436 | } |
4de189fe | 1437 | strlist__delete(rawlist); |
146a1439 MH |
1438 | |
1439 | return ret; | |
4de189fe MH |
1440 | } |
1441 | ||
b498ce1f | 1442 | /* Get current perf-probe event names */ |
0e60836b | 1443 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1444 | { |
fa28244d | 1445 | char buf[128]; |
b498ce1f MH |
1446 | struct strlist *sl, *rawlist; |
1447 | struct str_node *ent; | |
0e60836b | 1448 | struct probe_trace_event tev; |
146a1439 | 1449 | int ret = 0; |
b498ce1f | 1450 | |
4235b045 | 1451 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 1452 | rawlist = get_probe_trace_command_rawlist(fd); |
e1d2017b | 1453 | sl = strlist__new(true, NULL); |
adf365f4 | 1454 | strlist__for_each(ent, rawlist) { |
0e60836b | 1455 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1456 | if (ret < 0) |
1457 | break; | |
fa28244d | 1458 | if (include_group) { |
146a1439 MH |
1459 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1460 | tev.event); | |
1461 | if (ret >= 0) | |
1462 | ret = strlist__add(sl, buf); | |
fa28244d | 1463 | } else |
146a1439 | 1464 | ret = strlist__add(sl, tev.event); |
0e60836b | 1465 | clear_probe_trace_event(&tev); |
146a1439 MH |
1466 | if (ret < 0) |
1467 | break; | |
b498ce1f | 1468 | } |
b498ce1f MH |
1469 | strlist__delete(rawlist); |
1470 | ||
146a1439 MH |
1471 | if (ret < 0) { |
1472 | strlist__delete(sl); | |
1473 | return NULL; | |
1474 | } | |
b498ce1f MH |
1475 | return sl; |
1476 | } | |
1477 | ||
0e60836b | 1478 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 1479 | { |
6eca8cc3 | 1480 | int ret = 0; |
0e60836b | 1481 | char *buf = synthesize_probe_trace_command(tev); |
50656eec | 1482 | |
146a1439 | 1483 | if (!buf) { |
0e60836b | 1484 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
1485 | return -EINVAL; |
1486 | } | |
1487 | ||
fa28244d | 1488 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1489 | if (!probe_event_dry_run) { |
1490 | ret = write(fd, buf, strlen(buf)); | |
1491 | if (ret <= 0) | |
146a1439 MH |
1492 | pr_warning("Failed to write event: %s\n", |
1493 | strerror(errno)); | |
f4d7da49 | 1494 | } |
4235b045 | 1495 | free(buf); |
146a1439 | 1496 | return ret; |
50656eec MH |
1497 | } |
1498 | ||
146a1439 MH |
1499 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1500 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1501 | { |
1502 | int i, ret; | |
17f88fcd MH |
1503 | |
1504 | /* Try no suffix */ | |
1505 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1506 | if (ret < 0) { |
1507 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1508 | return ret; | |
1509 | } | |
17f88fcd | 1510 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1511 | return 0; |
17f88fcd | 1512 | |
d761b08b MH |
1513 | if (!allow_suffix) { |
1514 | pr_warning("Error: event \"%s\" already exists. " | |
1515 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1516 | return -EEXIST; |
d761b08b MH |
1517 | } |
1518 | ||
17f88fcd MH |
1519 | /* Try to add suffix */ |
1520 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1521 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1522 | if (ret < 0) { |
1523 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1524 | return ret; | |
1525 | } | |
b498ce1f MH |
1526 | if (!strlist__has_entry(namelist, buf)) |
1527 | break; | |
1528 | } | |
146a1439 MH |
1529 | if (i == MAX_EVENT_INDEX) { |
1530 | pr_warning("Too many events are on the same function.\n"); | |
1531 | ret = -ERANGE; | |
1532 | } | |
1533 | ||
1534 | return ret; | |
b498ce1f MH |
1535 | } |
1536 | ||
0e60836b SD |
1537 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
1538 | struct probe_trace_event *tevs, | |
146a1439 | 1539 | int ntevs, bool allow_suffix) |
50656eec | 1540 | { |
146a1439 | 1541 | int i, fd, ret; |
0e60836b | 1542 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
1543 | char buf[64]; |
1544 | const char *event, *group; | |
b498ce1f | 1545 | struct strlist *namelist; |
50656eec | 1546 | |
f4d7da49 | 1547 | fd = open_kprobe_events(true); |
146a1439 MH |
1548 | if (fd < 0) |
1549 | return fd; | |
b498ce1f | 1550 | /* Get current event names */ |
0e60836b | 1551 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
1552 | if (!namelist) { |
1553 | pr_debug("Failed to get current event list.\n"); | |
1554 | return -EIO; | |
1555 | } | |
4235b045 | 1556 | |
146a1439 | 1557 | ret = 0; |
4235b045 | 1558 | printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1559 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1560 | tev = &tevs[i]; |
1561 | if (pev->event) | |
1562 | event = pev->event; | |
1563 | else | |
1564 | if (pev->point.function) | |
1565 | event = pev->point.function; | |
1566 | else | |
1567 | event = tev->point.symbol; | |
1568 | if (pev->group) | |
1569 | group = pev->group; | |
1570 | else | |
1571 | group = PERFPROBE_GROUP; | |
1572 | ||
1573 | /* Get an unused new event name */ | |
146a1439 MH |
1574 | ret = get_new_event_name(buf, 64, event, |
1575 | namelist, allow_suffix); | |
1576 | if (ret < 0) | |
1577 | break; | |
4235b045 MH |
1578 | event = buf; |
1579 | ||
02b95dad MH |
1580 | tev->event = strdup(event); |
1581 | tev->group = strdup(group); | |
1582 | if (tev->event == NULL || tev->group == NULL) { | |
1583 | ret = -ENOMEM; | |
1584 | break; | |
1585 | } | |
0e60836b | 1586 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
1587 | if (ret < 0) |
1588 | break; | |
4235b045 MH |
1589 | /* Add added event name to namelist */ |
1590 | strlist__add(namelist, event); | |
1591 | ||
1592 | /* Trick here - save current event/group */ | |
1593 | event = pev->event; | |
1594 | group = pev->group; | |
1595 | pev->event = tev->event; | |
1596 | pev->group = tev->group; | |
1597 | show_perf_probe_event(pev); | |
1598 | /* Trick here - restore current event/group */ | |
1599 | pev->event = (char *)event; | |
1600 | pev->group = (char *)group; | |
1601 | ||
1602 | /* | |
1603 | * Probes after the first probe which comes from same | |
1604 | * user input are always allowed to add suffix, because | |
1605 | * there might be several addresses corresponding to | |
1606 | * one code line. | |
1607 | */ | |
1608 | allow_suffix = true; | |
50656eec | 1609 | } |
146a1439 MH |
1610 | |
1611 | if (ret >= 0) { | |
1612 | /* Show how to use the event. */ | |
1613 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
1614 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
1615 | tev->event); | |
1616 | } | |
a9b495b0 | 1617 | |
e1d2017b | 1618 | strlist__delete(namelist); |
50656eec | 1619 | close(fd); |
146a1439 | 1620 | return ret; |
50656eec | 1621 | } |
fa28244d | 1622 | |
0e60836b SD |
1623 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
1624 | struct probe_trace_event **tevs, | |
469b9b88 | 1625 | int max_tevs, const char *module) |
e0faa8d3 MH |
1626 | { |
1627 | struct symbol *sym; | |
e334016f | 1628 | int ret = 0, i; |
0e60836b | 1629 | struct probe_trace_event *tev; |
4235b045 | 1630 | |
4b4da7f7 | 1631 | /* Convert perf_probe_event with debuginfo */ |
469b9b88 | 1632 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, module); |
e334016f MH |
1633 | if (ret != 0) |
1634 | return ret; | |
e0faa8d3 | 1635 | |
4235b045 | 1636 | /* Allocate trace event buffer */ |
0e60836b | 1637 | tev = *tevs = zalloc(sizeof(struct probe_trace_event)); |
e334016f MH |
1638 | if (tev == NULL) |
1639 | return -ENOMEM; | |
4235b045 MH |
1640 | |
1641 | /* Copy parameters */ | |
02b95dad MH |
1642 | tev->point.symbol = strdup(pev->point.function); |
1643 | if (tev->point.symbol == NULL) { | |
1644 | ret = -ENOMEM; | |
1645 | goto error; | |
1646 | } | |
4235b045 | 1647 | tev->point.offset = pev->point.offset; |
04ddd04b | 1648 | tev->point.retprobe = pev->point.retprobe; |
4235b045 MH |
1649 | tev->nargs = pev->nargs; |
1650 | if (tev->nargs) { | |
0e60836b | 1651 | tev->args = zalloc(sizeof(struct probe_trace_arg) |
e334016f MH |
1652 | * tev->nargs); |
1653 | if (tev->args == NULL) { | |
02b95dad MH |
1654 | ret = -ENOMEM; |
1655 | goto error; | |
e334016f | 1656 | } |
48481938 | 1657 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1658 | if (pev->args[i].name) { |
1659 | tev->args[i].name = strdup(pev->args[i].name); | |
1660 | if (tev->args[i].name == NULL) { | |
1661 | ret = -ENOMEM; | |
1662 | goto error; | |
1663 | } | |
1664 | } | |
1665 | tev->args[i].value = strdup(pev->args[i].var); | |
1666 | if (tev->args[i].value == NULL) { | |
1667 | ret = -ENOMEM; | |
1668 | goto error; | |
1669 | } | |
1670 | if (pev->args[i].type) { | |
1671 | tev->args[i].type = strdup(pev->args[i].type); | |
1672 | if (tev->args[i].type == NULL) { | |
1673 | ret = -ENOMEM; | |
1674 | goto error; | |
1675 | } | |
1676 | } | |
48481938 | 1677 | } |
4235b045 MH |
1678 | } |
1679 | ||
1680 | /* Currently just checking function name from symbol map */ | |
469b9b88 | 1681 | sym = __find_kernel_function_by_name(tev->point.symbol, NULL); |
146a1439 MH |
1682 | if (!sym) { |
1683 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1684 | tev->point.symbol); | |
02b95dad MH |
1685 | ret = -ENOENT; |
1686 | goto error; | |
1687 | } | |
e334016f | 1688 | |
02b95dad MH |
1689 | return 1; |
1690 | error: | |
0e60836b | 1691 | clear_probe_trace_event(tev); |
02b95dad MH |
1692 | free(tev); |
1693 | *tevs = NULL; | |
e334016f | 1694 | return ret; |
4235b045 MH |
1695 | } |
1696 | ||
1697 | struct __event_package { | |
1698 | struct perf_probe_event *pev; | |
0e60836b | 1699 | struct probe_trace_event *tevs; |
4235b045 MH |
1700 | int ntevs; |
1701 | }; | |
1702 | ||
146a1439 | 1703 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
469b9b88 | 1704 | int max_tevs, const char *module, bool force_add) |
4235b045 | 1705 | { |
146a1439 | 1706 | int i, j, ret; |
4235b045 MH |
1707 | struct __event_package *pkgs; |
1708 | ||
e334016f MH |
1709 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
1710 | if (pkgs == NULL) | |
1711 | return -ENOMEM; | |
4235b045 MH |
1712 | |
1713 | /* Init vmlinux path */ | |
146a1439 | 1714 | ret = init_vmlinux(); |
449e5b24 MH |
1715 | if (ret < 0) { |
1716 | free(pkgs); | |
146a1439 | 1717 | return ret; |
449e5b24 | 1718 | } |
4235b045 MH |
1719 | |
1720 | /* Loop 1: convert all events */ | |
1721 | for (i = 0; i < npevs; i++) { | |
1722 | pkgs[i].pev = &pevs[i]; | |
1723 | /* Convert with or without debuginfo */ | |
0e60836b | 1724 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
1725 | &pkgs[i].tevs, |
1726 | max_tevs, | |
1727 | module); | |
146a1439 MH |
1728 | if (ret < 0) |
1729 | goto end; | |
1730 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
1731 | } |
1732 | ||
4235b045 | 1733 | /* Loop 2: add all events */ |
146a1439 | 1734 | for (i = 0; i < npevs && ret >= 0; i++) |
0e60836b | 1735 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 MH |
1736 | pkgs[i].ntevs, force_add); |
1737 | end: | |
449e5b24 MH |
1738 | /* Loop 3: cleanup and free trace events */ |
1739 | for (i = 0; i < npevs; i++) { | |
146a1439 | 1740 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 1741 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
449e5b24 MH |
1742 | free(pkgs[i].tevs); |
1743 | } | |
1744 | free(pkgs); | |
146a1439 MH |
1745 | |
1746 | return ret; | |
e0faa8d3 MH |
1747 | } |
1748 | ||
0e60836b | 1749 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
1750 | { |
1751 | char *p; | |
1752 | char buf[128]; | |
4235b045 | 1753 | int ret; |
bbbb521b | 1754 | |
0e60836b | 1755 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
1756 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
1757 | if (ret < 0) | |
1758 | goto error; | |
1759 | ||
bbbb521b | 1760 | p = strchr(buf + 2, ':'); |
146a1439 MH |
1761 | if (!p) { |
1762 | pr_debug("Internal error: %s should have ':' but not.\n", | |
1763 | ent->s); | |
1764 | ret = -ENOTSUP; | |
1765 | goto error; | |
1766 | } | |
bbbb521b MH |
1767 | *p = '/'; |
1768 | ||
4235b045 MH |
1769 | pr_debug("Writing event: %s\n", buf); |
1770 | ret = write(fd, buf, strlen(buf)); | |
146a1439 MH |
1771 | if (ret < 0) |
1772 | goto error; | |
1773 | ||
bbbb521b | 1774 | printf("Remove event: %s\n", ent->s); |
146a1439 MH |
1775 | return 0; |
1776 | error: | |
1777 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
1778 | return ret; | |
bbbb521b MH |
1779 | } |
1780 | ||
0e60836b | 1781 | static int del_trace_probe_event(int fd, const char *group, |
146a1439 | 1782 | const char *event, struct strlist *namelist) |
fa28244d MH |
1783 | { |
1784 | char buf[128]; | |
bbbb521b | 1785 | struct str_node *ent, *n; |
146a1439 | 1786 | int found = 0, ret = 0; |
fa28244d | 1787 | |
146a1439 MH |
1788 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
1789 | if (ret < 0) { | |
1790 | pr_err("Failed to copy event."); | |
1791 | return ret; | |
1792 | } | |
fa28244d | 1793 | |
bbbb521b MH |
1794 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
1795 | strlist__for_each_safe(ent, n, namelist) | |
1796 | if (strglobmatch(ent->s, buf)) { | |
1797 | found++; | |
0e60836b | 1798 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
1799 | if (ret < 0) |
1800 | break; | |
bbbb521b MH |
1801 | strlist__remove(namelist, ent); |
1802 | } | |
1803 | } else { | |
1804 | ent = strlist__find(namelist, buf); | |
1805 | if (ent) { | |
1806 | found++; | |
0e60836b | 1807 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
1808 | if (ret >= 0) |
1809 | strlist__remove(namelist, ent); | |
bbbb521b MH |
1810 | } |
1811 | } | |
146a1439 MH |
1812 | if (found == 0 && ret >= 0) |
1813 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
1814 | ||
1815 | return ret; | |
fa28244d MH |
1816 | } |
1817 | ||
146a1439 | 1818 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 1819 | { |
146a1439 | 1820 | int fd, ret = 0; |
fa28244d MH |
1821 | const char *group, *event; |
1822 | char *p, *str; | |
1823 | struct str_node *ent; | |
1824 | struct strlist *namelist; | |
1825 | ||
f4d7da49 | 1826 | fd = open_kprobe_events(true); |
146a1439 MH |
1827 | if (fd < 0) |
1828 | return fd; | |
1829 | ||
fa28244d | 1830 | /* Get current event names */ |
0e60836b | 1831 | namelist = get_probe_trace_event_names(fd, true); |
146a1439 MH |
1832 | if (namelist == NULL) |
1833 | return -EINVAL; | |
fa28244d | 1834 | |
adf365f4 | 1835 | strlist__for_each(ent, dellist) { |
02b95dad MH |
1836 | str = strdup(ent->s); |
1837 | if (str == NULL) { | |
1838 | ret = -ENOMEM; | |
1839 | break; | |
1840 | } | |
bbbb521b | 1841 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
1842 | p = strchr(str, ':'); |
1843 | if (p) { | |
1844 | group = str; | |
1845 | *p = '\0'; | |
1846 | event = p + 1; | |
1847 | } else { | |
bbbb521b | 1848 | group = "*"; |
fa28244d MH |
1849 | event = str; |
1850 | } | |
bbbb521b | 1851 | pr_debug("Group: %s, Event: %s\n", group, event); |
0e60836b | 1852 | ret = del_trace_probe_event(fd, group, event, namelist); |
fa28244d | 1853 | free(str); |
146a1439 MH |
1854 | if (ret < 0) |
1855 | break; | |
fa28244d MH |
1856 | } |
1857 | strlist__delete(namelist); | |
1858 | close(fd); | |
146a1439 MH |
1859 | |
1860 | return ret; | |
fa28244d MH |
1861 | } |
1862 |