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 | ||
50656eec MH |
22 | #include <sys/utsname.h> |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | #include <fcntl.h> | |
26 | #include <errno.h> | |
27 | #include <stdio.h> | |
28 | #include <unistd.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
4de189fe MH |
31 | #include <stdarg.h> |
32 | #include <limits.h> | |
e80711ca | 33 | #include <elf.h> |
50656eec | 34 | |
31facc5f | 35 | #include "util.h" |
50656eec | 36 | #include "event.h" |
4de189fe | 37 | #include "strlist.h" |
50656eec | 38 | #include "debug.h" |
72041334 | 39 | #include "cache.h" |
631c9def | 40 | #include "color.h" |
e0faa8d3 MH |
41 | #include "symbol.h" |
42 | #include "thread.h" | |
7ca5989d | 43 | #include "debugfs.h" |
1d037ca1 | 44 | #include "trace-event.h" /* For __maybe_unused */ |
50656eec | 45 | #include "probe-event.h" |
4235b045 | 46 | #include "probe-finder.h" |
225466f1 | 47 | #include "session.h" |
50656eec MH |
48 | |
49 | #define MAX_CMDLEN 256 | |
50 | #define MAX_PROBE_ARGS 128 | |
51 | #define PERFPROBE_GROUP "probe" | |
52 | ||
f4d7da49 MH |
53 | bool probe_event_dry_run; /* Dry run flag */ |
54 | ||
146a1439 | 55 | #define semantic_error(msg ...) pr_err("Semantic error :" msg) |
50656eec | 56 | |
4de189fe | 57 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
58 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
59 | __attribute__((format(printf, 3, 4))); | |
60 | ||
4de189fe MH |
61 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
62 | { | |
63 | int ret; | |
64 | va_list ap; | |
65 | va_start(ap, format); | |
66 | ret = vsnprintf(str, size, format, ap); | |
67 | va_end(ap); | |
68 | if (ret >= (int)size) | |
69 | ret = -E2BIG; | |
70 | return ret; | |
71 | } | |
72 | ||
4b4da7f7 | 73 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp); |
225466f1 SD |
74 | static int convert_name_to_addr(struct perf_probe_event *pev, |
75 | const char *exec); | |
d28c6223 | 76 | static struct machine machine; |
e0faa8d3 | 77 | |
469b9b88 | 78 | /* Initialize symbol maps and path of vmlinux/modules */ |
146a1439 | 79 | static int init_vmlinux(void) |
e0faa8d3 | 80 | { |
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 | |
469b9b88 | 94 | ret = machine__init(&machine, "", HOST_KERNEL_ID); |
d28c6223 ACM |
95 | if (ret < 0) |
96 | goto out; | |
97 | ||
469b9b88 | 98 | if (machine__create_kernel_maps(&machine) < 0) { |
0e43e5d2 | 99 | pr_debug("machine__create_kernel_maps() failed.\n"); |
469b9b88 MH |
100 | goto out; |
101 | } | |
146a1439 MH |
102 | out: |
103 | if (ret < 0) | |
104 | pr_warning("Failed to init vmlinux path.\n"); | |
105 | return ret; | |
e0faa8d3 MH |
106 | } |
107 | ||
469b9b88 MH |
108 | static struct symbol *__find_kernel_function_by_name(const char *name, |
109 | struct map **mapp) | |
110 | { | |
111 | return machine__find_kernel_function_by_name(&machine, name, mapp, | |
112 | NULL); | |
113 | } | |
114 | ||
e80711ca MH |
115 | static struct map *kernel_get_module_map(const char *module) |
116 | { | |
117 | struct rb_node *nd; | |
118 | struct map_groups *grp = &machine.kmaps; | |
119 | ||
14a8fd7c MH |
120 | /* A file path -- this is an offline module */ |
121 | if (module && strchr(module, '/')) | |
122 | return machine__new_module(&machine, 0, module); | |
123 | ||
e80711ca MH |
124 | if (!module) |
125 | module = "kernel"; | |
126 | ||
127 | for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) { | |
128 | struct map *pos = rb_entry(nd, struct map, rb_node); | |
129 | if (strncmp(pos->dso->short_name + 1, module, | |
130 | pos->dso->short_name_len - 2) == 0) { | |
131 | return pos; | |
132 | } | |
133 | } | |
134 | return NULL; | |
135 | } | |
136 | ||
137 | static struct dso *kernel_get_module_dso(const char *module) | |
469b9b88 MH |
138 | { |
139 | struct dso *dso; | |
fd930ff9 FBH |
140 | struct map *map; |
141 | const char *vmlinux_name; | |
469b9b88 MH |
142 | |
143 | if (module) { | |
144 | list_for_each_entry(dso, &machine.kernel_dsos, node) { | |
145 | if (strncmp(dso->short_name + 1, module, | |
146 | dso->short_name_len - 2) == 0) | |
147 | goto found; | |
148 | } | |
149 | pr_debug("Failed to find module %s.\n", module); | |
150 | return NULL; | |
fd930ff9 FBH |
151 | } |
152 | ||
153 | map = machine.vmlinux_maps[MAP__FUNCTION]; | |
154 | dso = map->dso; | |
155 | ||
156 | vmlinux_name = symbol_conf.vmlinux_name; | |
157 | if (vmlinux_name) { | |
158 | if (dso__load_vmlinux(dso, map, vmlinux_name, NULL) <= 0) | |
159 | return NULL; | |
469b9b88 | 160 | } else { |
c3a34e06 | 161 | if (dso__load_vmlinux_path(dso, map, NULL) <= 0) { |
469b9b88 MH |
162 | pr_debug("Failed to load kernel map.\n"); |
163 | return NULL; | |
164 | } | |
165 | } | |
166 | found: | |
e80711ca MH |
167 | return dso; |
168 | } | |
169 | ||
170 | const char *kernel_get_module_path(const char *module) | |
171 | { | |
172 | struct dso *dso = kernel_get_module_dso(module); | |
173 | return (dso) ? dso->long_name : NULL; | |
469b9b88 MH |
174 | } |
175 | ||
225466f1 SD |
176 | static int init_user_exec(void) |
177 | { | |
178 | int ret = 0; | |
179 | ||
180 | symbol_conf.try_vmlinux_path = false; | |
181 | symbol_conf.sort_by_name = true; | |
182 | ret = symbol__init(); | |
183 | ||
184 | if (ret < 0) | |
185 | pr_debug("Failed to init symbol map.\n"); | |
186 | ||
187 | return ret; | |
188 | } | |
189 | ||
190 | static int convert_to_perf_probe_point(struct probe_trace_point *tp, | |
191 | struct perf_probe_point *pp) | |
192 | { | |
193 | pp->function = strdup(tp->symbol); | |
194 | ||
195 | if (pp->function == NULL) | |
196 | return -ENOMEM; | |
197 | ||
198 | pp->offset = tp->offset; | |
199 | pp->retprobe = tp->retprobe; | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
4b4da7f7 | 204 | #ifdef DWARF_SUPPORT |
ff741783 MH |
205 | /* Open new debuginfo of given module */ |
206 | static struct debuginfo *open_debuginfo(const char *module) | |
e0faa8d3 | 207 | { |
14a8fd7c | 208 | const char *path; |
ff741783 | 209 | |
14a8fd7c MH |
210 | /* A file path -- this is an offline module */ |
211 | if (module && strchr(module, '/')) | |
212 | path = module; | |
213 | else { | |
214 | path = kernel_get_module_path(module); | |
215 | ||
216 | if (!path) { | |
217 | pr_err("Failed to find path of %s module.\n", | |
218 | module ?: "kernel"); | |
219 | return NULL; | |
220 | } | |
e0faa8d3 | 221 | } |
ff741783 | 222 | return debuginfo__new(path); |
e0faa8d3 | 223 | } |
4b4da7f7 | 224 | |
0e60836b SD |
225 | /* |
226 | * Convert trace point to probe point with debuginfo | |
227 | * Currently only handles kprobes. | |
228 | */ | |
229 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, | |
469b9b88 | 230 | struct perf_probe_point *pp) |
4b4da7f7 MH |
231 | { |
232 | struct symbol *sym; | |
469b9b88 MH |
233 | struct map *map; |
234 | u64 addr; | |
235 | int ret = -ENOENT; | |
ff741783 | 236 | struct debuginfo *dinfo; |
4b4da7f7 | 237 | |
469b9b88 | 238 | sym = __find_kernel_function_by_name(tp->symbol, &map); |
4b4da7f7 | 239 | if (sym) { |
469b9b88 | 240 | addr = map->unmap_ip(map, sym->start + tp->offset); |
9486aa38 | 241 | pr_debug("try to find %s+%ld@%" PRIx64 "\n", tp->symbol, |
469b9b88 | 242 | tp->offset, addr); |
ff741783 MH |
243 | |
244 | dinfo = debuginfo__new_online_kernel(addr); | |
245 | if (dinfo) { | |
246 | ret = debuginfo__find_probe_point(dinfo, | |
247 | (unsigned long)addr, pp); | |
248 | debuginfo__delete(dinfo); | |
249 | } else { | |
250 | pr_debug("Failed to open debuginfo at 0x%" PRIx64 "\n", | |
251 | addr); | |
252 | ret = -ENOENT; | |
253 | } | |
4b4da7f7 MH |
254 | } |
255 | if (ret <= 0) { | |
146a1439 MH |
256 | pr_debug("Failed to find corresponding probes from " |
257 | "debuginfo. Use kprobe event information.\n"); | |
225466f1 | 258 | return convert_to_perf_probe_point(tp, pp); |
4b4da7f7 MH |
259 | } |
260 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
261 | |
262 | return 0; | |
4b4da7f7 MH |
263 | } |
264 | ||
190b57fc MH |
265 | static int add_module_to_probe_trace_events(struct probe_trace_event *tevs, |
266 | int ntevs, const char *module) | |
267 | { | |
14a8fd7c MH |
268 | int i, ret = 0; |
269 | char *tmp; | |
270 | ||
271 | if (!module) | |
272 | return 0; | |
273 | ||
274 | tmp = strrchr(module, '/'); | |
275 | if (tmp) { | |
276 | /* This is a module path -- get the module name */ | |
277 | module = strdup(tmp + 1); | |
278 | if (!module) | |
279 | return -ENOMEM; | |
280 | tmp = strchr(module, '.'); | |
281 | if (tmp) | |
282 | *tmp = '\0'; | |
283 | tmp = (char *)module; /* For free() */ | |
284 | } | |
285 | ||
190b57fc MH |
286 | for (i = 0; i < ntevs; i++) { |
287 | tevs[i].point.module = strdup(module); | |
14a8fd7c MH |
288 | if (!tevs[i].point.module) { |
289 | ret = -ENOMEM; | |
290 | break; | |
291 | } | |
190b57fc | 292 | } |
14a8fd7c MH |
293 | |
294 | if (tmp) | |
295 | free(tmp); | |
296 | ||
297 | return ret; | |
190b57fc MH |
298 | } |
299 | ||
4b4da7f7 | 300 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 301 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
190b57fc | 302 | struct probe_trace_event **tevs, |
4eced234 | 303 | int max_tevs, const char *target) |
4b4da7f7 MH |
304 | { |
305 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
225466f1 | 306 | struct debuginfo *dinfo; |
190b57fc | 307 | int ntevs, ret = 0; |
4b4da7f7 | 308 | |
225466f1 SD |
309 | if (pev->uprobes) { |
310 | if (need_dwarf) { | |
311 | pr_warning("Debuginfo-analysis is not yet supported" | |
312 | " with -x/--exec option.\n"); | |
313 | return -ENOSYS; | |
314 | } | |
315 | return convert_name_to_addr(pev, target); | |
316 | } | |
317 | ||
318 | dinfo = open_debuginfo(target); | |
319 | ||
ff741783 | 320 | if (!dinfo) { |
146a1439 MH |
321 | if (need_dwarf) { |
322 | pr_warning("Failed to open debuginfo file.\n"); | |
ff741783 | 323 | return -ENOENT; |
146a1439 | 324 | } |
ff741783 | 325 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
326 | return 0; |
327 | } | |
328 | ||
ff741783 MH |
329 | /* Searching trace events corresponding to a probe event */ |
330 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs); | |
331 | ||
332 | debuginfo__delete(dinfo); | |
4b4da7f7 | 333 | |
146a1439 | 334 | if (ntevs > 0) { /* Succeeded to find trace events */ |
0e60836b | 335 | pr_debug("find %d probe_trace_events.\n", ntevs); |
4eced234 | 336 | if (target) |
190b57fc | 337 | ret = add_module_to_probe_trace_events(*tevs, ntevs, |
4eced234 | 338 | target); |
190b57fc | 339 | return ret < 0 ? ret : ntevs; |
146a1439 | 340 | } |
4b4da7f7 | 341 | |
146a1439 MH |
342 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
343 | pr_warning("Probe point '%s' not found.\n", | |
344 | synthesize_perf_probe_point(&pev->point)); | |
345 | return -ENOENT; | |
346 | } | |
347 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
348 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
349 | if (ntevs == -EBADF) { | |
350 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
351 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
352 | if (!need_dwarf) { | |
0e43e5d2 | 353 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
354 | return 0; |
355 | } | |
4b4da7f7 | 356 | } |
15eca306 | 357 | return ntevs; |
4b4da7f7 MH |
358 | } |
359 | ||
7cf0b79e MH |
360 | /* |
361 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
362 | * and chop off leading directories that do not exist. Result is passed back as | |
363 | * a newly allocated path on success. | |
364 | * Return 0 if file was found and readable, -errno otherwise. | |
365 | */ | |
6a330a3c MH |
366 | static int get_real_path(const char *raw_path, const char *comp_dir, |
367 | char **new_path) | |
7cf0b79e | 368 | { |
6a330a3c MH |
369 | const char *prefix = symbol_conf.source_prefix; |
370 | ||
371 | if (!prefix) { | |
372 | if (raw_path[0] != '/' && comp_dir) | |
373 | /* If not an absolute path, try to use comp_dir */ | |
374 | prefix = comp_dir; | |
375 | else { | |
376 | if (access(raw_path, R_OK) == 0) { | |
377 | *new_path = strdup(raw_path); | |
378 | return 0; | |
379 | } else | |
380 | return -errno; | |
381 | } | |
7cf0b79e MH |
382 | } |
383 | ||
6a330a3c | 384 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
7cf0b79e MH |
385 | if (!*new_path) |
386 | return -ENOMEM; | |
387 | ||
388 | for (;;) { | |
6a330a3c | 389 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
7cf0b79e MH |
390 | |
391 | if (access(*new_path, R_OK) == 0) | |
392 | return 0; | |
393 | ||
6a330a3c MH |
394 | if (!symbol_conf.source_prefix) |
395 | /* In case of searching comp_dir, don't retry */ | |
396 | return -errno; | |
397 | ||
7cf0b79e MH |
398 | switch (errno) { |
399 | case ENAMETOOLONG: | |
400 | case ENOENT: | |
401 | case EROFS: | |
402 | case EFAULT: | |
403 | raw_path = strchr(++raw_path, '/'); | |
404 | if (!raw_path) { | |
405 | free(*new_path); | |
406 | *new_path = NULL; | |
407 | return -ENOENT; | |
408 | } | |
409 | continue; | |
410 | ||
411 | default: | |
412 | free(*new_path); | |
413 | *new_path = NULL; | |
414 | return -errno; | |
415 | } | |
416 | } | |
417 | } | |
418 | ||
4b4da7f7 MH |
419 | #define LINEBUF_SIZE 256 |
420 | #define NR_ADDITIONAL_LINES 2 | |
421 | ||
fde52dbd | 422 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
423 | { |
424 | char buf[LINEBUF_SIZE]; | |
befe3414 FBH |
425 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
426 | const char *prefix = NULL; | |
4b4da7f7 | 427 | |
befe3414 | 428 | do { |
4b4da7f7 MH |
429 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
430 | goto error; | |
befe3414 FBH |
431 | if (skip) |
432 | continue; | |
433 | if (!prefix) { | |
434 | prefix = show_num ? "%7d " : " "; | |
435 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 436 | } |
befe3414 FBH |
437 | color_fprintf(stdout, color, "%s", buf); |
438 | ||
439 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 440 | |
fde52dbd | 441 | return 1; |
4b4da7f7 | 442 | error: |
fde52dbd | 443 | if (ferror(fp)) { |
32b2b6ec | 444 | pr_warning("File read error: %s\n", strerror(errno)); |
fde52dbd FBH |
445 | return -1; |
446 | } | |
447 | return 0; | |
448 | } | |
146a1439 | 449 | |
fde52dbd FBH |
450 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
451 | { | |
452 | int rv = __show_one_line(fp, l, skip, show_num); | |
453 | if (rv == 0) { | |
454 | pr_warning("Source file is shorter than expected.\n"); | |
455 | rv = -1; | |
456 | } | |
457 | return rv; | |
4b4da7f7 MH |
458 | } |
459 | ||
fde52dbd FBH |
460 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
461 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
462 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
463 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
464 | ||
4b4da7f7 MH |
465 | /* |
466 | * Show line-range always requires debuginfo to find source file and | |
467 | * line number. | |
468 | */ | |
469b9b88 | 469 | int show_line_range(struct line_range *lr, const char *module) |
4b4da7f7 | 470 | { |
d3b63d7a | 471 | int l = 1; |
4b4da7f7 | 472 | struct line_node *ln; |
ff741783 | 473 | struct debuginfo *dinfo; |
4b4da7f7 | 474 | FILE *fp; |
ff741783 | 475 | int ret; |
7cf0b79e | 476 | char *tmp; |
4b4da7f7 MH |
477 | |
478 | /* Search a line range */ | |
146a1439 MH |
479 | ret = init_vmlinux(); |
480 | if (ret < 0) | |
481 | return ret; | |
482 | ||
ff741783 MH |
483 | dinfo = open_debuginfo(module); |
484 | if (!dinfo) { | |
146a1439 | 485 | pr_warning("Failed to open debuginfo file.\n"); |
ff741783 | 486 | return -ENOENT; |
146a1439 MH |
487 | } |
488 | ||
ff741783 MH |
489 | ret = debuginfo__find_line_range(dinfo, lr); |
490 | debuginfo__delete(dinfo); | |
146a1439 MH |
491 | if (ret == 0) { |
492 | pr_warning("Specified source line is not found.\n"); | |
493 | return -ENOENT; | |
494 | } else if (ret < 0) { | |
495 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
496 | return ret; | |
497 | } | |
4b4da7f7 | 498 | |
7cf0b79e MH |
499 | /* Convert source file path */ |
500 | tmp = lr->path; | |
6a330a3c | 501 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
7cf0b79e MH |
502 | free(tmp); /* Free old path */ |
503 | if (ret < 0) { | |
504 | pr_warning("Failed to find source file. (%d)\n", ret); | |
505 | return ret; | |
506 | } | |
507 | ||
4b4da7f7 MH |
508 | setup_pager(); |
509 | ||
510 | if (lr->function) | |
8737ebde | 511 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
512 | lr->start - lr->offset); |
513 | else | |
62c15fc4 | 514 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
515 | |
516 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
517 | if (fp == NULL) { |
518 | pr_warning("Failed to open %s: %s\n", lr->path, | |
519 | strerror(errno)); | |
520 | return -errno; | |
521 | } | |
4b4da7f7 | 522 | /* Skip to starting line number */ |
44b81e92 | 523 | while (l < lr->start) { |
fde52dbd | 524 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
525 | if (ret < 0) |
526 | goto end; | |
527 | } | |
4b4da7f7 MH |
528 | |
529 | list_for_each_entry(ln, &lr->line_list, list) { | |
44b81e92 | 530 | for (; ln->line > l; l++) { |
fde52dbd | 531 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
532 | if (ret < 0) |
533 | goto end; | |
534 | } | |
fde52dbd | 535 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
536 | if (ret < 0) |
537 | goto end; | |
4b4da7f7 MH |
538 | } |
539 | ||
540 | if (lr->end == INT_MAX) | |
541 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
542 | while (l <= lr->end) { |
543 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
544 | if (ret <= 0) | |
44b81e92 FBH |
545 | break; |
546 | } | |
146a1439 | 547 | end: |
4b4da7f7 | 548 | fclose(fp); |
146a1439 | 549 | return ret; |
4b4da7f7 MH |
550 | } |
551 | ||
ff741783 MH |
552 | static int show_available_vars_at(struct debuginfo *dinfo, |
553 | struct perf_probe_event *pev, | |
bd09d7b5 MH |
554 | int max_vls, struct strfilter *_filter, |
555 | bool externs) | |
cf6eb489 MH |
556 | { |
557 | char *buf; | |
bd09d7b5 | 558 | int ret, i, nvars; |
cf6eb489 MH |
559 | struct str_node *node; |
560 | struct variable_list *vls = NULL, *vl; | |
bd09d7b5 | 561 | const char *var; |
cf6eb489 MH |
562 | |
563 | buf = synthesize_perf_probe_point(&pev->point); | |
564 | if (!buf) | |
565 | return -EINVAL; | |
566 | pr_debug("Searching variables at %s\n", buf); | |
567 | ||
ff741783 MH |
568 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls, |
569 | max_vls, externs); | |
bd09d7b5 MH |
570 | if (ret <= 0) { |
571 | pr_err("Failed to find variables at %s (%d)\n", buf, ret); | |
572 | goto end; | |
573 | } | |
574 | /* Some variables are found */ | |
575 | fprintf(stdout, "Available variables at %s\n", buf); | |
576 | for (i = 0; i < ret; i++) { | |
577 | vl = &vls[i]; | |
578 | /* | |
579 | * A probe point might be converted to | |
580 | * several trace points. | |
581 | */ | |
582 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
583 | vl->point.offset); | |
584 | free(vl->point.symbol); | |
585 | nvars = 0; | |
586 | if (vl->vars) { | |
587 | strlist__for_each(node, vl->vars) { | |
588 | var = strchr(node->s, '\t') + 1; | |
589 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 590 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
591 | nvars++; |
592 | } | |
593 | } | |
594 | strlist__delete(vl->vars); | |
cf6eb489 | 595 | } |
bd09d7b5 MH |
596 | if (nvars == 0) |
597 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
598 | } | |
599 | free(vls); | |
600 | end: | |
cf6eb489 MH |
601 | free(buf); |
602 | return ret; | |
603 | } | |
604 | ||
605 | /* Show available variables on given probe point */ | |
606 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
bd09d7b5 MH |
607 | int max_vls, const char *module, |
608 | struct strfilter *_filter, bool externs) | |
cf6eb489 | 609 | { |
ff741783 MH |
610 | int i, ret = 0; |
611 | struct debuginfo *dinfo; | |
cf6eb489 MH |
612 | |
613 | ret = init_vmlinux(); | |
614 | if (ret < 0) | |
615 | return ret; | |
616 | ||
ff741783 MH |
617 | dinfo = open_debuginfo(module); |
618 | if (!dinfo) { | |
619 | pr_warning("Failed to open debuginfo file.\n"); | |
620 | return -ENOENT; | |
621 | } | |
622 | ||
cf6eb489 MH |
623 | setup_pager(); |
624 | ||
ff741783 MH |
625 | for (i = 0; i < npevs && ret >= 0; i++) |
626 | ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter, | |
bd09d7b5 | 627 | externs); |
ff741783 MH |
628 | |
629 | debuginfo__delete(dinfo); | |
cf6eb489 MH |
630 | return ret; |
631 | } | |
632 | ||
4b4da7f7 MH |
633 | #else /* !DWARF_SUPPORT */ |
634 | ||
0e60836b | 635 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, |
469b9b88 | 636 | struct perf_probe_point *pp) |
4b4da7f7 | 637 | { |
469b9b88 MH |
638 | struct symbol *sym; |
639 | ||
640 | sym = __find_kernel_function_by_name(tp->symbol, NULL); | |
641 | if (!sym) { | |
642 | pr_err("Failed to find symbol %s in kernel.\n", tp->symbol); | |
643 | return -ENOENT; | |
644 | } | |
146a1439 | 645 | |
225466f1 | 646 | return convert_to_perf_probe_point(tp, pp); |
4b4da7f7 MH |
647 | } |
648 | ||
0e60836b | 649 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
1d037ca1 IT |
650 | struct probe_trace_event **tevs __maybe_unused, |
651 | int max_tevs __maybe_unused, const char *target) | |
4b4da7f7 | 652 | { |
146a1439 MH |
653 | if (perf_probe_event_need_dwarf(pev)) { |
654 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
655 | return -ENOSYS; | |
656 | } | |
225466f1 SD |
657 | |
658 | if (pev->uprobes) | |
659 | return convert_name_to_addr(pev, target); | |
660 | ||
4b4da7f7 MH |
661 | return 0; |
662 | } | |
663 | ||
1d037ca1 IT |
664 | int show_line_range(struct line_range *lr __maybe_unused, |
665 | const char *module __maybe_unused) | |
4b4da7f7 | 666 | { |
146a1439 MH |
667 | pr_warning("Debuginfo-analysis is not supported.\n"); |
668 | return -ENOSYS; | |
4b4da7f7 MH |
669 | } |
670 | ||
1d037ca1 IT |
671 | int show_available_vars(struct perf_probe_event *pevs __maybe_unused, |
672 | int npevs __maybe_unused, int max_vls __maybe_unused, | |
673 | const char *module __maybe_unused, | |
674 | struct strfilter *filter __maybe_unused, | |
675 | bool externs __maybe_unused) | |
cf6eb489 MH |
676 | { |
677 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
678 | return -ENOSYS; | |
679 | } | |
e0faa8d3 MH |
680 | #endif |
681 | ||
21dd9ae5 FBH |
682 | static int parse_line_num(char **ptr, int *val, const char *what) |
683 | { | |
684 | const char *start = *ptr; | |
685 | ||
686 | errno = 0; | |
687 | *val = strtol(*ptr, ptr, 0); | |
688 | if (errno || *ptr == start) { | |
689 | semantic_error("'%s' is not a valid number.\n", what); | |
690 | return -EINVAL; | |
691 | } | |
692 | return 0; | |
693 | } | |
694 | ||
9d95b580 FBH |
695 | /* |
696 | * Stuff 'lr' according to the line range described by 'arg'. | |
697 | * The line range syntax is described by: | |
698 | * | |
699 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 700 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 701 | */ |
146a1439 | 702 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 703 | { |
e116dfa1 | 704 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
705 | int err; |
706 | ||
707 | if (!name) | |
708 | return -ENOMEM; | |
709 | ||
710 | lr->start = 0; | |
711 | lr->end = INT_MAX; | |
712 | ||
713 | range = strchr(name, ':'); | |
714 | if (range) { | |
715 | *range++ = '\0'; | |
716 | ||
717 | err = parse_line_num(&range, &lr->start, "start line"); | |
718 | if (err) | |
719 | goto err; | |
720 | ||
721 | if (*range == '+' || *range == '-') { | |
722 | const char c = *range++; | |
723 | ||
724 | err = parse_line_num(&range, &lr->end, "end line"); | |
725 | if (err) | |
726 | goto err; | |
727 | ||
728 | if (c == '+') { | |
729 | lr->end += lr->start; | |
730 | /* | |
731 | * Adjust the number of lines here. | |
732 | * If the number of lines == 1, the | |
733 | * the end of line should be equal to | |
734 | * the start of line. | |
735 | */ | |
736 | lr->end--; | |
737 | } | |
738 | } | |
9d95b580 | 739 | |
d3b63d7a | 740 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
741 | |
742 | err = -EINVAL; | |
d3b63d7a | 743 | if (lr->start > lr->end) { |
631c9def | 744 | semantic_error("Start line must be smaller" |
146a1439 | 745 | " than end line.\n"); |
21dd9ae5 | 746 | goto err; |
146a1439 | 747 | } |
21dd9ae5 FBH |
748 | if (*range != '\0') { |
749 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
750 | goto err; | |
146a1439 | 751 | } |
d3b63d7a | 752 | } |
02b95dad | 753 | |
e116dfa1 MH |
754 | file = strchr(name, '@'); |
755 | if (file) { | |
756 | *file = '\0'; | |
757 | lr->file = strdup(++file); | |
758 | if (lr->file == NULL) { | |
759 | err = -ENOMEM; | |
760 | goto err; | |
761 | } | |
762 | lr->function = name; | |
763 | } else if (strchr(name, '.')) | |
21dd9ae5 | 764 | lr->file = name; |
631c9def | 765 | else |
21dd9ae5 | 766 | lr->function = name; |
146a1439 MH |
767 | |
768 | return 0; | |
21dd9ae5 FBH |
769 | err: |
770 | free(name); | |
771 | return err; | |
631c9def MH |
772 | } |
773 | ||
b7702a21 MH |
774 | /* Check the name is good for event/group */ |
775 | static bool check_event_name(const char *name) | |
776 | { | |
777 | if (!isalpha(*name) && *name != '_') | |
778 | return false; | |
779 | while (*++name != '\0') { | |
780 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
781 | return false; | |
782 | } | |
783 | return true; | |
784 | } | |
785 | ||
50656eec | 786 | /* Parse probepoint definition. */ |
146a1439 | 787 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 788 | { |
4235b045 | 789 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
790 | char *ptr, *tmp; |
791 | char c, nc = 0; | |
792 | /* | |
793 | * <Syntax> | |
2a9c8c36 MH |
794 | * perf probe [EVENT=]SRC[:LN|;PTN] |
795 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
796 | * |
797 | * TODO:Group name support | |
50656eec MH |
798 | */ |
799 | ||
2a9c8c36 MH |
800 | ptr = strpbrk(arg, ";=@+%"); |
801 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
802 | *ptr = '\0'; |
803 | tmp = ptr + 1; | |
146a1439 MH |
804 | if (strchr(arg, ':')) { |
805 | semantic_error("Group name is not supported yet.\n"); | |
806 | return -ENOTSUP; | |
807 | } | |
808 | if (!check_event_name(arg)) { | |
b7702a21 | 809 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
810 | "follow C symbol-naming rule.\n", arg); |
811 | return -EINVAL; | |
812 | } | |
02b95dad MH |
813 | pev->event = strdup(arg); |
814 | if (pev->event == NULL) | |
815 | return -ENOMEM; | |
4235b045 | 816 | pev->group = NULL; |
af663d75 MH |
817 | arg = tmp; |
818 | } | |
819 | ||
2a9c8c36 | 820 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
821 | if (ptr) { |
822 | nc = *ptr; | |
823 | *ptr++ = '\0'; | |
824 | } | |
825 | ||
02b95dad MH |
826 | tmp = strdup(arg); |
827 | if (tmp == NULL) | |
828 | return -ENOMEM; | |
829 | ||
50656eec | 830 | /* Check arg is function or file and copy it */ |
02b95dad MH |
831 | if (strchr(tmp, '.')) /* File */ |
832 | pp->file = tmp; | |
50656eec | 833 | else /* Function */ |
02b95dad | 834 | pp->function = tmp; |
50656eec MH |
835 | |
836 | /* Parse other options */ | |
837 | while (ptr) { | |
838 | arg = ptr; | |
839 | c = nc; | |
2a9c8c36 | 840 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
841 | pp->lazy_line = strdup(arg); |
842 | if (pp->lazy_line == NULL) | |
843 | return -ENOMEM; | |
2a9c8c36 MH |
844 | break; |
845 | } | |
846 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
847 | if (ptr) { |
848 | nc = *ptr; | |
849 | *ptr++ = '\0'; | |
850 | } | |
851 | switch (c) { | |
852 | case ':': /* Line number */ | |
853 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 854 | if (*tmp != '\0') { |
2a9c8c36 | 855 | semantic_error("There is non-digit char" |
146a1439 MH |
856 | " in line number.\n"); |
857 | return -EINVAL; | |
858 | } | |
50656eec MH |
859 | break; |
860 | case '+': /* Byte offset from a symbol */ | |
861 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 862 | if (*tmp != '\0') { |
2a9c8c36 | 863 | semantic_error("There is non-digit character" |
146a1439 MH |
864 | " in offset.\n"); |
865 | return -EINVAL; | |
866 | } | |
50656eec MH |
867 | break; |
868 | case '@': /* File name */ | |
146a1439 MH |
869 | if (pp->file) { |
870 | semantic_error("SRC@SRC is not allowed.\n"); | |
871 | return -EINVAL; | |
872 | } | |
02b95dad MH |
873 | pp->file = strdup(arg); |
874 | if (pp->file == NULL) | |
875 | return -ENOMEM; | |
50656eec MH |
876 | break; |
877 | case '%': /* Probe places */ | |
878 | if (strcmp(arg, "return") == 0) { | |
879 | pp->retprobe = 1; | |
146a1439 MH |
880 | } else { /* Others not supported yet */ |
881 | semantic_error("%%%s is not supported.\n", arg); | |
882 | return -ENOTSUP; | |
883 | } | |
50656eec | 884 | break; |
146a1439 MH |
885 | default: /* Buggy case */ |
886 | pr_err("This program has a bug at %s:%d.\n", | |
887 | __FILE__, __LINE__); | |
888 | return -ENOTSUP; | |
50656eec MH |
889 | break; |
890 | } | |
891 | } | |
892 | ||
893 | /* Exclusion check */ | |
146a1439 | 894 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
895 | semantic_error("Lazy pattern can't be used with" |
896 | " line number.\n"); | |
146a1439 MH |
897 | return -EINVAL; |
898 | } | |
2a9c8c36 | 899 | |
146a1439 | 900 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 901 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
902 | return -EINVAL; |
903 | } | |
2a9c8c36 | 904 | |
146a1439 | 905 | if (pp->line && pp->offset) { |
0e43e5d2 | 906 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
907 | return -EINVAL; |
908 | } | |
50656eec | 909 | |
146a1439 | 910 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 911 | semantic_error("File always requires line number or " |
0e43e5d2 | 912 | "lazy pattern.\n"); |
146a1439 MH |
913 | return -EINVAL; |
914 | } | |
50656eec | 915 | |
146a1439 | 916 | if (pp->offset && !pp->function) { |
0e43e5d2 | 917 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
918 | return -EINVAL; |
919 | } | |
50656eec | 920 | |
146a1439 | 921 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 922 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
923 | return -EINVAL; |
924 | } | |
50656eec | 925 | |
146a1439 | 926 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 927 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 928 | "return probe.\n"); |
146a1439 MH |
929 | return -EINVAL; |
930 | } | |
50656eec | 931 | |
4235b045 | 932 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
933 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
934 | pp->lazy_line); | |
146a1439 | 935 | return 0; |
50656eec MH |
936 | } |
937 | ||
7df2f329 | 938 | /* Parse perf-probe event argument */ |
146a1439 | 939 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 940 | { |
b2a3c12b | 941 | char *tmp, *goodname; |
7df2f329 MH |
942 | struct perf_probe_arg_field **fieldp; |
943 | ||
944 | pr_debug("parsing arg: %s into ", str); | |
945 | ||
48481938 MH |
946 | tmp = strchr(str, '='); |
947 | if (tmp) { | |
02b95dad MH |
948 | arg->name = strndup(str, tmp - str); |
949 | if (arg->name == NULL) | |
950 | return -ENOMEM; | |
11a1ca35 | 951 | pr_debug("name:%s ", arg->name); |
48481938 MH |
952 | str = tmp + 1; |
953 | } | |
954 | ||
11a1ca35 MH |
955 | tmp = strchr(str, ':'); |
956 | if (tmp) { /* Type setting */ | |
957 | *tmp = '\0'; | |
02b95dad MH |
958 | arg->type = strdup(tmp + 1); |
959 | if (arg->type == NULL) | |
960 | return -ENOMEM; | |
11a1ca35 MH |
961 | pr_debug("type:%s ", arg->type); |
962 | } | |
963 | ||
b2a3c12b | 964 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
965 | if (!is_c_varname(str) || !tmp) { |
966 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
967 | arg->var = strdup(str); |
968 | if (arg->var == NULL) | |
969 | return -ENOMEM; | |
48481938 | 970 | pr_debug("%s\n", arg->var); |
146a1439 | 971 | return 0; |
7df2f329 MH |
972 | } |
973 | ||
b2a3c12b | 974 | /* Structure fields or array element */ |
02b95dad MH |
975 | arg->var = strndup(str, tmp - str); |
976 | if (arg->var == NULL) | |
977 | return -ENOMEM; | |
b2a3c12b | 978 | goodname = arg->var; |
48481938 | 979 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
980 | fieldp = &arg->field; |
981 | ||
982 | do { | |
e334016f MH |
983 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
984 | if (*fieldp == NULL) | |
985 | return -ENOMEM; | |
b2a3c12b MH |
986 | if (*tmp == '[') { /* Array */ |
987 | str = tmp; | |
988 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 989 | (*fieldp)->ref = true; |
b2a3c12b MH |
990 | if (*tmp != ']' || tmp == str + 1) { |
991 | semantic_error("Array index must be a" | |
992 | " number.\n"); | |
993 | return -EINVAL; | |
994 | } | |
995 | tmp++; | |
996 | if (*tmp == '\0') | |
997 | tmp = NULL; | |
998 | } else { /* Structure */ | |
999 | if (*tmp == '.') { | |
1000 | str = tmp + 1; | |
1001 | (*fieldp)->ref = false; | |
1002 | } else if (tmp[1] == '>') { | |
1003 | str = tmp + 2; | |
1004 | (*fieldp)->ref = true; | |
1005 | } else { | |
1006 | semantic_error("Argument parse error: %s\n", | |
1007 | str); | |
1008 | return -EINVAL; | |
1009 | } | |
1010 | tmp = strpbrk(str, "-.["); | |
146a1439 | 1011 | } |
7df2f329 | 1012 | if (tmp) { |
02b95dad MH |
1013 | (*fieldp)->name = strndup(str, tmp - str); |
1014 | if ((*fieldp)->name == NULL) | |
1015 | return -ENOMEM; | |
b2a3c12b MH |
1016 | if (*str != '[') |
1017 | goodname = (*fieldp)->name; | |
7df2f329 MH |
1018 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
1019 | fieldp = &(*fieldp)->next; | |
1020 | } | |
1021 | } while (tmp); | |
02b95dad MH |
1022 | (*fieldp)->name = strdup(str); |
1023 | if ((*fieldp)->name == NULL) | |
1024 | return -ENOMEM; | |
b2a3c12b MH |
1025 | if (*str != '[') |
1026 | goodname = (*fieldp)->name; | |
7df2f329 | 1027 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 1028 | |
b2a3c12b | 1029 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 1030 | if (!arg->name) { |
b2a3c12b | 1031 | arg->name = strdup(goodname); |
02b95dad MH |
1032 | if (arg->name == NULL) |
1033 | return -ENOMEM; | |
1034 | } | |
146a1439 | 1035 | return 0; |
7df2f329 MH |
1036 | } |
1037 | ||
4235b045 | 1038 | /* Parse perf-probe event command */ |
146a1439 | 1039 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1040 | { |
e1c01d61 | 1041 | char **argv; |
146a1439 | 1042 | int argc, i, ret = 0; |
fac13fd5 | 1043 | |
4235b045 | 1044 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1045 | if (!argv) { |
1046 | pr_debug("Failed to split arguments.\n"); | |
1047 | return -ENOMEM; | |
1048 | } | |
1049 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1050 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1051 | ret = -ERANGE; | |
1052 | goto out; | |
1053 | } | |
50656eec | 1054 | /* Parse probe point */ |
146a1439 MH |
1055 | ret = parse_perf_probe_point(argv[0], pev); |
1056 | if (ret < 0) | |
1057 | goto out; | |
50656eec | 1058 | |
e1c01d61 | 1059 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1060 | pev->nargs = argc - 1; |
e334016f MH |
1061 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1062 | if (pev->args == NULL) { | |
1063 | ret = -ENOMEM; | |
1064 | goto out; | |
1065 | } | |
146a1439 MH |
1066 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1067 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1068 | if (ret >= 0 && | |
1069 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1070 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1071 | " kretprobe.\n"); |
1072 | ret = -EINVAL; | |
1073 | } | |
e1c01d61 | 1074 | } |
146a1439 | 1075 | out: |
e1c01d61 | 1076 | argv_free(argv); |
146a1439 MH |
1077 | |
1078 | return ret; | |
50656eec MH |
1079 | } |
1080 | ||
4235b045 MH |
1081 | /* Return true if this perf_probe_event requires debuginfo */ |
1082 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1083 | { | |
1084 | int i; | |
1085 | ||
1086 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
1087 | return true; | |
1088 | ||
1089 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 1090 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
1091 | return true; |
1092 | ||
1093 | return false; | |
1094 | } | |
1095 | ||
0e60836b SD |
1096 | /* Parse probe_events event into struct probe_point */ |
1097 | static int parse_probe_trace_command(const char *cmd, | |
190b57fc | 1098 | struct probe_trace_event *tev) |
4de189fe | 1099 | { |
0e60836b | 1100 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1101 | char pr; |
1102 | char *p; | |
bcbd0040 | 1103 | char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str; |
4de189fe MH |
1104 | int ret, i, argc; |
1105 | char **argv; | |
1106 | ||
0e60836b | 1107 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1108 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1109 | if (!argv) { |
1110 | pr_debug("Failed to split arguments.\n"); | |
1111 | return -ENOMEM; | |
1112 | } | |
1113 | if (argc < 2) { | |
1114 | semantic_error("Too few probe arguments.\n"); | |
1115 | ret = -ERANGE; | |
1116 | goto out; | |
1117 | } | |
4de189fe MH |
1118 | |
1119 | /* Scan event and group name. */ | |
bcbd0040 IT |
1120 | argv0_str = strdup(argv[0]); |
1121 | if (argv0_str == NULL) { | |
1122 | ret = -ENOMEM; | |
1123 | goto out; | |
1124 | } | |
1125 | fmt1_str = strtok_r(argv0_str, ":", &fmt); | |
1126 | fmt2_str = strtok_r(NULL, "/", &fmt); | |
1127 | fmt3_str = strtok_r(NULL, " \t", &fmt); | |
1128 | if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL | |
1129 | || fmt3_str == NULL) { | |
146a1439 MH |
1130 | semantic_error("Failed to parse event name: %s\n", argv[0]); |
1131 | ret = -EINVAL; | |
1132 | goto out; | |
1133 | } | |
bcbd0040 IT |
1134 | pr = fmt1_str[0]; |
1135 | tev->group = strdup(fmt2_str); | |
1136 | tev->event = strdup(fmt3_str); | |
1137 | if (tev->group == NULL || tev->event == NULL) { | |
1138 | ret = -ENOMEM; | |
1139 | goto out; | |
1140 | } | |
4235b045 | 1141 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1142 | |
4235b045 | 1143 | tp->retprobe = (pr == 'r'); |
4de189fe | 1144 | |
190b57fc MH |
1145 | /* Scan module name(if there), function name and offset */ |
1146 | p = strchr(argv[1], ':'); | |
1147 | if (p) { | |
1148 | tp->module = strndup(argv[1], p - argv[1]); | |
1149 | p++; | |
1150 | } else | |
1151 | p = argv[1]; | |
bcbd0040 IT |
1152 | fmt1_str = strtok_r(p, "+", &fmt); |
1153 | tp->symbol = strdup(fmt1_str); | |
1154 | if (tp->symbol == NULL) { | |
1155 | ret = -ENOMEM; | |
1156 | goto out; | |
1157 | } | |
1158 | fmt2_str = strtok_r(NULL, "", &fmt); | |
1159 | if (fmt2_str == NULL) | |
4235b045 | 1160 | tp->offset = 0; |
bcbd0040 IT |
1161 | else |
1162 | tp->offset = strtoul(fmt2_str, NULL, 10); | |
4de189fe | 1163 | |
4235b045 | 1164 | tev->nargs = argc - 2; |
0e60836b | 1165 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1166 | if (tev->args == NULL) { |
1167 | ret = -ENOMEM; | |
1168 | goto out; | |
1169 | } | |
4235b045 | 1170 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1171 | p = strchr(argv[i + 2], '='); |
1172 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1173 | *p++ = '\0'; |
1174 | else | |
1175 | p = argv[i + 2]; | |
02b95dad | 1176 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1177 | /* TODO: parse regs and offset */ |
02b95dad MH |
1178 | tev->args[i].value = strdup(p); |
1179 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1180 | ret = -ENOMEM; | |
1181 | goto out; | |
1182 | } | |
4de189fe | 1183 | } |
146a1439 MH |
1184 | ret = 0; |
1185 | out: | |
bcbd0040 | 1186 | free(argv0_str); |
4de189fe | 1187 | argv_free(argv); |
146a1439 | 1188 | return ret; |
4de189fe MH |
1189 | } |
1190 | ||
7df2f329 MH |
1191 | /* Compose only probe arg */ |
1192 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
1193 | { | |
1194 | struct perf_probe_arg_field *field = pa->field; | |
1195 | int ret; | |
1196 | char *tmp = buf; | |
1197 | ||
48481938 MH |
1198 | if (pa->name && pa->var) |
1199 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
1200 | else | |
1201 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
1202 | if (ret <= 0) |
1203 | goto error; | |
1204 | tmp += ret; | |
1205 | len -= ret; | |
1206 | ||
1207 | while (field) { | |
b2a3c12b MH |
1208 | if (field->name[0] == '[') |
1209 | ret = e_snprintf(tmp, len, "%s", field->name); | |
1210 | else | |
1211 | ret = e_snprintf(tmp, len, "%s%s", | |
1212 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
1213 | if (ret <= 0) |
1214 | goto error; | |
1215 | tmp += ret; | |
1216 | len -= ret; | |
1217 | field = field->next; | |
1218 | } | |
11a1ca35 MH |
1219 | |
1220 | if (pa->type) { | |
1221 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
1222 | if (ret <= 0) | |
1223 | goto error; | |
1224 | tmp += ret; | |
1225 | len -= ret; | |
1226 | } | |
1227 | ||
7df2f329 MH |
1228 | return tmp - buf; |
1229 | error: | |
0e43e5d2 | 1230 | pr_debug("Failed to synthesize perf probe argument: %s\n", |
146a1439 MH |
1231 | strerror(-ret)); |
1232 | return ret; | |
7df2f329 MH |
1233 | } |
1234 | ||
4235b045 MH |
1235 | /* Compose only probe point (not argument) */ |
1236 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1237 | { |
fb1587d8 MH |
1238 | char *buf, *tmp; |
1239 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1240 | int ret, len; | |
4de189fe | 1241 | |
e334016f MH |
1242 | buf = zalloc(MAX_CMDLEN); |
1243 | if (buf == NULL) { | |
1244 | ret = -ENOMEM; | |
1245 | goto error; | |
1246 | } | |
4de189fe | 1247 | if (pp->offset) { |
fb1587d8 | 1248 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1249 | if (ret <= 0) |
1250 | goto error; | |
1251 | } | |
1252 | if (pp->line) { | |
fb1587d8 MH |
1253 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1254 | if (ret <= 0) | |
1255 | goto error; | |
1256 | } | |
1257 | if (pp->file) { | |
32ae2ade FBH |
1258 | tmp = pp->file; |
1259 | len = strlen(tmp); | |
1260 | if (len > 30) { | |
1261 | tmp = strchr(pp->file + len - 30, '/'); | |
1262 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1263 | } | |
1264 | ret = e_snprintf(file, 32, "@%s", tmp); | |
4de189fe MH |
1265 | if (ret <= 0) |
1266 | goto error; | |
1267 | } | |
1268 | ||
1269 | if (pp->function) | |
fb1587d8 MH |
1270 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1271 | offs, pp->retprobe ? "%return" : "", line, | |
1272 | file); | |
4de189fe | 1273 | else |
fb1587d8 | 1274 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1275 | if (ret <= 0) |
1276 | goto error; | |
1277 | ||
1278 | return buf; | |
7ef17aaf | 1279 | error: |
0e43e5d2 | 1280 | pr_debug("Failed to synthesize perf probe point: %s\n", |
146a1439 | 1281 | strerror(-ret)); |
e334016f MH |
1282 | if (buf) |
1283 | free(buf); | |
146a1439 | 1284 | return NULL; |
7ef17aaf MH |
1285 | } |
1286 | ||
4235b045 MH |
1287 | #if 0 |
1288 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1289 | { |
1290 | char *buf; | |
1291 | int i, len, ret; | |
1292 | ||
4235b045 MH |
1293 | buf = synthesize_perf_probe_point(&pev->point); |
1294 | if (!buf) | |
1295 | return NULL; | |
4de189fe | 1296 | |
4235b045 MH |
1297 | len = strlen(buf); |
1298 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1299 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1300 | pev->args[i].name); |
1301 | if (ret <= 0) { | |
1302 | free(buf); | |
1303 | return NULL; | |
1304 | } | |
4de189fe MH |
1305 | len += ret; |
1306 | } | |
4de189fe | 1307 | |
4235b045 MH |
1308 | return buf; |
1309 | } | |
1310 | #endif | |
1311 | ||
0e60836b | 1312 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1313 | char **buf, size_t *buflen, |
1314 | int depth) | |
1315 | { | |
1316 | int ret; | |
1317 | if (ref->next) { | |
0e60836b | 1318 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1319 | buflen, depth + 1); |
1320 | if (depth < 0) | |
1321 | goto out; | |
1322 | } | |
1323 | ||
1324 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1325 | if (ret < 0) | |
1326 | depth = ret; | |
1327 | else { | |
1328 | *buf += ret; | |
1329 | *buflen -= ret; | |
1330 | } | |
1331 | out: | |
1332 | return depth; | |
4de189fe | 1333 | |
4de189fe MH |
1334 | } |
1335 | ||
0e60836b | 1336 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1337 | char *buf, size_t buflen) |
50656eec | 1338 | { |
0e60836b | 1339 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1340 | int ret, depth = 0; |
1341 | char *tmp = buf; | |
1342 | ||
1343 | /* Argument name or separator */ | |
1344 | if (arg->name) | |
1345 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1346 | else | |
1347 | ret = e_snprintf(buf, buflen, " "); | |
1348 | if (ret < 0) | |
1349 | return ret; | |
1350 | buf += ret; | |
1351 | buflen -= ret; | |
1352 | ||
b7dcb857 MH |
1353 | /* Special case: @XXX */ |
1354 | if (arg->value[0] == '@' && arg->ref) | |
1355 | ref = ref->next; | |
1356 | ||
4235b045 | 1357 | /* Dereferencing arguments */ |
b7dcb857 | 1358 | if (ref) { |
0e60836b | 1359 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1360 | &buflen, 1); |
1361 | if (depth < 0) | |
1362 | return depth; | |
1363 | } | |
1364 | ||
1365 | /* Print argument value */ | |
b7dcb857 MH |
1366 | if (arg->value[0] == '@' && arg->ref) |
1367 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1368 | arg->ref->offset); | |
1369 | else | |
1370 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1371 | if (ret < 0) |
1372 | return ret; | |
1373 | buf += ret; | |
1374 | buflen -= ret; | |
1375 | ||
1376 | /* Closing */ | |
1377 | while (depth--) { | |
1378 | ret = e_snprintf(buf, buflen, ")"); | |
1379 | if (ret < 0) | |
1380 | return ret; | |
1381 | buf += ret; | |
1382 | buflen -= ret; | |
1383 | } | |
4984912e MH |
1384 | /* Print argument type */ |
1385 | if (arg->type) { | |
1386 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1387 | if (ret <= 0) | |
1388 | return ret; | |
1389 | buf += ret; | |
1390 | } | |
4235b045 MH |
1391 | |
1392 | return buf - tmp; | |
1393 | } | |
1394 | ||
0e60836b | 1395 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1396 | { |
0e60836b | 1397 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1398 | char *buf; |
1399 | int i, len, ret; | |
1400 | ||
e334016f MH |
1401 | buf = zalloc(MAX_CMDLEN); |
1402 | if (buf == NULL) | |
1403 | return NULL; | |
1404 | ||
225466f1 SD |
1405 | if (tev->uprobes) |
1406 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s:%s", | |
1407 | tp->retprobe ? 'r' : 'p', | |
1408 | tev->group, tev->event, | |
1409 | tp->module, tp->symbol); | |
1410 | else | |
1411 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s%s%s+%lu", | |
1412 | tp->retprobe ? 'r' : 'p', | |
1413 | tev->group, tev->event, | |
1414 | tp->module ?: "", tp->module ? ":" : "", | |
1415 | tp->symbol, tp->offset); | |
1416 | ||
4235b045 | 1417 | if (len <= 0) |
50656eec | 1418 | goto error; |
50656eec | 1419 | |
4235b045 | 1420 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1421 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1422 | MAX_CMDLEN - len); |
4de189fe | 1423 | if (ret <= 0) |
50656eec MH |
1424 | goto error; |
1425 | len += ret; | |
1426 | } | |
50656eec | 1427 | |
4235b045 | 1428 | return buf; |
50656eec | 1429 | error: |
4235b045 MH |
1430 | free(buf); |
1431 | return NULL; | |
1432 | } | |
50656eec | 1433 | |
0e60836b | 1434 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
225466f1 | 1435 | struct perf_probe_event *pev, bool is_kprobe) |
4235b045 | 1436 | { |
02b95dad | 1437 | char buf[64] = ""; |
146a1439 | 1438 | int i, ret; |
4235b045 | 1439 | |
4b4da7f7 | 1440 | /* Convert event/group name */ |
02b95dad MH |
1441 | pev->event = strdup(tev->event); |
1442 | pev->group = strdup(tev->group); | |
1443 | if (pev->event == NULL || pev->group == NULL) | |
1444 | return -ENOMEM; | |
fb1587d8 | 1445 | |
4b4da7f7 | 1446 | /* Convert trace_point to probe_point */ |
225466f1 SD |
1447 | if (is_kprobe) |
1448 | ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); | |
1449 | else | |
1450 | ret = convert_to_perf_probe_point(&tev->point, &pev->point); | |
1451 | ||
146a1439 MH |
1452 | if (ret < 0) |
1453 | return ret; | |
4b4da7f7 | 1454 | |
4235b045 MH |
1455 | /* Convert trace_arg to probe_arg */ |
1456 | pev->nargs = tev->nargs; | |
e334016f MH |
1457 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1458 | if (pev->args == NULL) | |
1459 | return -ENOMEM; | |
02b95dad | 1460 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1461 | if (tev->args[i].name) |
02b95dad | 1462 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1463 | else { |
0e60836b | 1464 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1465 | buf, 64); |
02b95dad | 1466 | pev->args[i].name = strdup(buf); |
4235b045 | 1467 | } |
02b95dad MH |
1468 | if (pev->args[i].name == NULL && ret >= 0) |
1469 | ret = -ENOMEM; | |
1470 | } | |
146a1439 MH |
1471 | |
1472 | if (ret < 0) | |
1473 | clear_perf_probe_event(pev); | |
1474 | ||
1475 | return ret; | |
4235b045 MH |
1476 | } |
1477 | ||
1478 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1479 | { | |
1480 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1481 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1482 | int i; |
1483 | ||
1484 | if (pev->event) | |
1485 | free(pev->event); | |
1486 | if (pev->group) | |
1487 | free(pev->group); | |
1488 | if (pp->file) | |
1489 | free(pp->file); | |
1490 | if (pp->function) | |
1491 | free(pp->function); | |
1492 | if (pp->lazy_line) | |
1493 | free(pp->lazy_line); | |
7df2f329 | 1494 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1495 | if (pev->args[i].name) |
1496 | free(pev->args[i].name); | |
48481938 MH |
1497 | if (pev->args[i].var) |
1498 | free(pev->args[i].var); | |
11a1ca35 MH |
1499 | if (pev->args[i].type) |
1500 | free(pev->args[i].type); | |
7df2f329 MH |
1501 | field = pev->args[i].field; |
1502 | while (field) { | |
1503 | next = field->next; | |
1504 | if (field->name) | |
1505 | free(field->name); | |
1506 | free(field); | |
1507 | field = next; | |
1508 | } | |
1509 | } | |
4235b045 MH |
1510 | if (pev->args) |
1511 | free(pev->args); | |
1512 | memset(pev, 0, sizeof(*pev)); | |
1513 | } | |
1514 | ||
0e60836b | 1515 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1516 | { |
0e60836b | 1517 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1518 | int i; |
1519 | ||
1520 | if (tev->event) | |
1521 | free(tev->event); | |
1522 | if (tev->group) | |
1523 | free(tev->group); | |
1524 | if (tev->point.symbol) | |
1525 | free(tev->point.symbol); | |
190b57fc MH |
1526 | if (tev->point.module) |
1527 | free(tev->point.module); | |
4235b045 MH |
1528 | for (i = 0; i < tev->nargs; i++) { |
1529 | if (tev->args[i].name) | |
1530 | free(tev->args[i].name); | |
1531 | if (tev->args[i].value) | |
1532 | free(tev->args[i].value); | |
4984912e MH |
1533 | if (tev->args[i].type) |
1534 | free(tev->args[i].type); | |
4235b045 MH |
1535 | ref = tev->args[i].ref; |
1536 | while (ref) { | |
1537 | next = ref->next; | |
1538 | free(ref); | |
1539 | ref = next; | |
1540 | } | |
1541 | } | |
1542 | if (tev->args) | |
1543 | free(tev->args); | |
1544 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1545 | } |
1546 | ||
225466f1 SD |
1547 | static void print_warn_msg(const char *file, bool is_kprobe) |
1548 | { | |
1549 | ||
1550 | if (errno == ENOENT) { | |
1551 | const char *config; | |
1552 | ||
1553 | if (!is_kprobe) | |
1554 | config = "CONFIG_UPROBE_EVENTS"; | |
1555 | else | |
1556 | config = "CONFIG_KPROBE_EVENTS"; | |
1557 | ||
1558 | pr_warning("%s file does not exist - please rebuild kernel" | |
1559 | " with %s.\n", file, config); | |
1560 | } else | |
1561 | pr_warning("Failed to open %s file: %s\n", file, | |
1562 | strerror(errno)); | |
1563 | } | |
1564 | ||
1565 | static int open_probe_events(const char *trace_file, bool readwrite, | |
1566 | bool is_kprobe) | |
4de189fe MH |
1567 | { |
1568 | char buf[PATH_MAX]; | |
7ca5989d | 1569 | const char *__debugfs; |
4de189fe MH |
1570 | int ret; |
1571 | ||
7ca5989d MH |
1572 | __debugfs = debugfs_find_mountpoint(); |
1573 | if (__debugfs == NULL) { | |
1574 | pr_warning("Debugfs is not mounted.\n"); | |
1575 | return -ENOENT; | |
1576 | } | |
1577 | ||
225466f1 | 1578 | ret = e_snprintf(buf, PATH_MAX, "%s/%s", __debugfs, trace_file); |
146a1439 | 1579 | if (ret >= 0) { |
7ca5989d | 1580 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1581 | if (readwrite && !probe_event_dry_run) |
1582 | ret = open(buf, O_RDWR, O_APPEND); | |
1583 | else | |
1584 | ret = open(buf, O_RDONLY, 0); | |
f4d7da49 | 1585 | |
225466f1 SD |
1586 | if (ret < 0) |
1587 | print_warn_msg(buf, is_kprobe); | |
4de189fe MH |
1588 | } |
1589 | return ret; | |
1590 | } | |
1591 | ||
225466f1 SD |
1592 | static int open_kprobe_events(bool readwrite) |
1593 | { | |
1594 | return open_probe_events("tracing/kprobe_events", readwrite, true); | |
1595 | } | |
1596 | ||
1597 | static int open_uprobe_events(bool readwrite) | |
1598 | { | |
1599 | return open_probe_events("tracing/uprobe_events", readwrite, false); | |
1600 | } | |
1601 | ||
1602 | /* Get raw string list of current kprobe_events or uprobe_events */ | |
0e60836b | 1603 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1604 | { |
1605 | int ret, idx; | |
1606 | FILE *fp; | |
1607 | char buf[MAX_CMDLEN]; | |
1608 | char *p; | |
1609 | struct strlist *sl; | |
1610 | ||
1611 | sl = strlist__new(true, NULL); | |
1612 | ||
1613 | fp = fdopen(dup(fd), "r"); | |
1614 | while (!feof(fp)) { | |
1615 | p = fgets(buf, MAX_CMDLEN, fp); | |
1616 | if (!p) | |
1617 | break; | |
1618 | ||
1619 | idx = strlen(p) - 1; | |
1620 | if (p[idx] == '\n') | |
1621 | p[idx] = '\0'; | |
1622 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1623 | if (ret < 0) { |
1624 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1625 | strlist__delete(sl); | |
1626 | return NULL; | |
1627 | } | |
4de189fe MH |
1628 | } |
1629 | fclose(fp); | |
1630 | ||
1631 | return sl; | |
1632 | } | |
1633 | ||
278498d4 | 1634 | /* Show an event */ |
146a1439 | 1635 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1636 | { |
7e990a51 | 1637 | int i, ret; |
278498d4 | 1638 | char buf[128]; |
4235b045 | 1639 | char *place; |
278498d4 | 1640 | |
4235b045 MH |
1641 | /* Synthesize only event probe point */ |
1642 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1643 | if (!place) |
1644 | return -EINVAL; | |
4235b045 MH |
1645 | |
1646 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1647 | if (ret < 0) |
146a1439 MH |
1648 | return ret; |
1649 | ||
fb1587d8 | 1650 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1651 | |
4235b045 | 1652 | if (pev->nargs > 0) { |
278498d4 | 1653 | printf(" with"); |
7df2f329 | 1654 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1655 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1656 | buf, 128); | |
1657 | if (ret < 0) | |
1658 | break; | |
7df2f329 MH |
1659 | printf(" %s", buf); |
1660 | } | |
278498d4 MH |
1661 | } |
1662 | printf(")\n"); | |
4235b045 | 1663 | free(place); |
146a1439 | 1664 | return ret; |
278498d4 MH |
1665 | } |
1666 | ||
225466f1 | 1667 | static int __show_perf_probe_events(int fd, bool is_kprobe) |
4de189fe | 1668 | { |
225466f1 | 1669 | int ret = 0; |
0e60836b | 1670 | struct probe_trace_event tev; |
4235b045 | 1671 | struct perf_probe_event pev; |
4de189fe MH |
1672 | struct strlist *rawlist; |
1673 | struct str_node *ent; | |
1674 | ||
4235b045 MH |
1675 | memset(&tev, 0, sizeof(tev)); |
1676 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1677 | |
0e60836b | 1678 | rawlist = get_probe_trace_command_rawlist(fd); |
146a1439 MH |
1679 | if (!rawlist) |
1680 | return -ENOENT; | |
4de189fe | 1681 | |
adf365f4 | 1682 | strlist__for_each(ent, rawlist) { |
0e60836b | 1683 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 | 1684 | if (ret >= 0) { |
225466f1 SD |
1685 | ret = convert_to_perf_probe_event(&tev, &pev, |
1686 | is_kprobe); | |
146a1439 MH |
1687 | if (ret >= 0) |
1688 | ret = show_perf_probe_event(&pev); | |
1689 | } | |
4235b045 | 1690 | clear_perf_probe_event(&pev); |
0e60836b | 1691 | clear_probe_trace_event(&tev); |
146a1439 MH |
1692 | if (ret < 0) |
1693 | break; | |
4de189fe | 1694 | } |
4de189fe | 1695 | strlist__delete(rawlist); |
146a1439 MH |
1696 | |
1697 | return ret; | |
4de189fe MH |
1698 | } |
1699 | ||
225466f1 SD |
1700 | /* List up current perf-probe events */ |
1701 | int show_perf_probe_events(void) | |
1702 | { | |
1703 | int fd, ret; | |
1704 | ||
1705 | setup_pager(); | |
1706 | fd = open_kprobe_events(false); | |
1707 | ||
1708 | if (fd < 0) | |
1709 | return fd; | |
1710 | ||
1711 | ret = init_vmlinux(); | |
1712 | if (ret < 0) | |
1713 | return ret; | |
1714 | ||
1715 | ret = __show_perf_probe_events(fd, true); | |
1716 | close(fd); | |
1717 | ||
1718 | fd = open_uprobe_events(false); | |
1719 | if (fd >= 0) { | |
1720 | ret = __show_perf_probe_events(fd, false); | |
1721 | close(fd); | |
1722 | } | |
1723 | ||
1724 | return ret; | |
1725 | } | |
1726 | ||
b498ce1f | 1727 | /* Get current perf-probe event names */ |
0e60836b | 1728 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1729 | { |
fa28244d | 1730 | char buf[128]; |
b498ce1f MH |
1731 | struct strlist *sl, *rawlist; |
1732 | struct str_node *ent; | |
0e60836b | 1733 | struct probe_trace_event tev; |
146a1439 | 1734 | int ret = 0; |
b498ce1f | 1735 | |
4235b045 | 1736 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 1737 | rawlist = get_probe_trace_command_rawlist(fd); |
e1d2017b | 1738 | sl = strlist__new(true, NULL); |
adf365f4 | 1739 | strlist__for_each(ent, rawlist) { |
0e60836b | 1740 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1741 | if (ret < 0) |
1742 | break; | |
fa28244d | 1743 | if (include_group) { |
146a1439 MH |
1744 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1745 | tev.event); | |
1746 | if (ret >= 0) | |
1747 | ret = strlist__add(sl, buf); | |
fa28244d | 1748 | } else |
146a1439 | 1749 | ret = strlist__add(sl, tev.event); |
0e60836b | 1750 | clear_probe_trace_event(&tev); |
146a1439 MH |
1751 | if (ret < 0) |
1752 | break; | |
b498ce1f | 1753 | } |
b498ce1f MH |
1754 | strlist__delete(rawlist); |
1755 | ||
146a1439 MH |
1756 | if (ret < 0) { |
1757 | strlist__delete(sl); | |
1758 | return NULL; | |
1759 | } | |
b498ce1f MH |
1760 | return sl; |
1761 | } | |
1762 | ||
0e60836b | 1763 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 1764 | { |
6eca8cc3 | 1765 | int ret = 0; |
0e60836b | 1766 | char *buf = synthesize_probe_trace_command(tev); |
50656eec | 1767 | |
146a1439 | 1768 | if (!buf) { |
0e60836b | 1769 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
1770 | return -EINVAL; |
1771 | } | |
1772 | ||
fa28244d | 1773 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1774 | if (!probe_event_dry_run) { |
1775 | ret = write(fd, buf, strlen(buf)); | |
1776 | if (ret <= 0) | |
146a1439 MH |
1777 | pr_warning("Failed to write event: %s\n", |
1778 | strerror(errno)); | |
f4d7da49 | 1779 | } |
4235b045 | 1780 | free(buf); |
146a1439 | 1781 | return ret; |
50656eec MH |
1782 | } |
1783 | ||
146a1439 MH |
1784 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1785 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1786 | { |
1787 | int i, ret; | |
17f88fcd MH |
1788 | |
1789 | /* Try no suffix */ | |
1790 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1791 | if (ret < 0) { |
1792 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1793 | return ret; | |
1794 | } | |
17f88fcd | 1795 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1796 | return 0; |
17f88fcd | 1797 | |
d761b08b MH |
1798 | if (!allow_suffix) { |
1799 | pr_warning("Error: event \"%s\" already exists. " | |
1800 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1801 | return -EEXIST; |
d761b08b MH |
1802 | } |
1803 | ||
17f88fcd MH |
1804 | /* Try to add suffix */ |
1805 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1806 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1807 | if (ret < 0) { |
1808 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1809 | return ret; | |
1810 | } | |
b498ce1f MH |
1811 | if (!strlist__has_entry(namelist, buf)) |
1812 | break; | |
1813 | } | |
146a1439 MH |
1814 | if (i == MAX_EVENT_INDEX) { |
1815 | pr_warning("Too many events are on the same function.\n"); | |
1816 | ret = -ERANGE; | |
1817 | } | |
1818 | ||
1819 | return ret; | |
b498ce1f MH |
1820 | } |
1821 | ||
0e60836b SD |
1822 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
1823 | struct probe_trace_event *tevs, | |
146a1439 | 1824 | int ntevs, bool allow_suffix) |
50656eec | 1825 | { |
146a1439 | 1826 | int i, fd, ret; |
0e60836b | 1827 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
1828 | char buf[64]; |
1829 | const char *event, *group; | |
b498ce1f | 1830 | struct strlist *namelist; |
50656eec | 1831 | |
225466f1 SD |
1832 | if (pev->uprobes) |
1833 | fd = open_uprobe_events(true); | |
1834 | else | |
1835 | fd = open_kprobe_events(true); | |
1836 | ||
146a1439 MH |
1837 | if (fd < 0) |
1838 | return fd; | |
b498ce1f | 1839 | /* Get current event names */ |
0e60836b | 1840 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
1841 | if (!namelist) { |
1842 | pr_debug("Failed to get current event list.\n"); | |
1843 | return -EIO; | |
1844 | } | |
4235b045 | 1845 | |
146a1439 | 1846 | ret = 0; |
a844d1ef | 1847 | printf("Added new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1848 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1849 | tev = &tevs[i]; |
1850 | if (pev->event) | |
1851 | event = pev->event; | |
1852 | else | |
1853 | if (pev->point.function) | |
1854 | event = pev->point.function; | |
1855 | else | |
1856 | event = tev->point.symbol; | |
1857 | if (pev->group) | |
1858 | group = pev->group; | |
1859 | else | |
1860 | group = PERFPROBE_GROUP; | |
1861 | ||
1862 | /* Get an unused new event name */ | |
146a1439 MH |
1863 | ret = get_new_event_name(buf, 64, event, |
1864 | namelist, allow_suffix); | |
1865 | if (ret < 0) | |
1866 | break; | |
4235b045 MH |
1867 | event = buf; |
1868 | ||
02b95dad MH |
1869 | tev->event = strdup(event); |
1870 | tev->group = strdup(group); | |
1871 | if (tev->event == NULL || tev->group == NULL) { | |
1872 | ret = -ENOMEM; | |
1873 | break; | |
1874 | } | |
0e60836b | 1875 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
1876 | if (ret < 0) |
1877 | break; | |
4235b045 MH |
1878 | /* Add added event name to namelist */ |
1879 | strlist__add(namelist, event); | |
1880 | ||
1881 | /* Trick here - save current event/group */ | |
1882 | event = pev->event; | |
1883 | group = pev->group; | |
1884 | pev->event = tev->event; | |
1885 | pev->group = tev->group; | |
1886 | show_perf_probe_event(pev); | |
1887 | /* Trick here - restore current event/group */ | |
1888 | pev->event = (char *)event; | |
1889 | pev->group = (char *)group; | |
1890 | ||
1891 | /* | |
1892 | * Probes after the first probe which comes from same | |
1893 | * user input are always allowed to add suffix, because | |
1894 | * there might be several addresses corresponding to | |
1895 | * one code line. | |
1896 | */ | |
1897 | allow_suffix = true; | |
50656eec | 1898 | } |
146a1439 MH |
1899 | |
1900 | if (ret >= 0) { | |
1901 | /* Show how to use the event. */ | |
a844d1ef | 1902 | printf("\nYou can now use it in all perf tools, such as:\n\n"); |
146a1439 MH |
1903 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, |
1904 | tev->event); | |
1905 | } | |
a9b495b0 | 1906 | |
e1d2017b | 1907 | strlist__delete(namelist); |
50656eec | 1908 | close(fd); |
146a1439 | 1909 | return ret; |
50656eec | 1910 | } |
fa28244d | 1911 | |
0e60836b SD |
1912 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
1913 | struct probe_trace_event **tevs, | |
4eced234 | 1914 | int max_tevs, const char *target) |
e0faa8d3 MH |
1915 | { |
1916 | struct symbol *sym; | |
e334016f | 1917 | int ret = 0, i; |
0e60836b | 1918 | struct probe_trace_event *tev; |
4235b045 | 1919 | |
4b4da7f7 | 1920 | /* Convert perf_probe_event with debuginfo */ |
4eced234 | 1921 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, target); |
e334016f | 1922 | if (ret != 0) |
190b57fc | 1923 | return ret; /* Found in debuginfo or got an error */ |
e0faa8d3 | 1924 | |
4235b045 | 1925 | /* Allocate trace event buffer */ |
0e60836b | 1926 | tev = *tevs = zalloc(sizeof(struct probe_trace_event)); |
e334016f MH |
1927 | if (tev == NULL) |
1928 | return -ENOMEM; | |
4235b045 MH |
1929 | |
1930 | /* Copy parameters */ | |
02b95dad MH |
1931 | tev->point.symbol = strdup(pev->point.function); |
1932 | if (tev->point.symbol == NULL) { | |
1933 | ret = -ENOMEM; | |
1934 | goto error; | |
1935 | } | |
ce27a443 | 1936 | |
4eced234 SD |
1937 | if (target) { |
1938 | tev->point.module = strdup(target); | |
ce27a443 JZ |
1939 | if (tev->point.module == NULL) { |
1940 | ret = -ENOMEM; | |
1941 | goto error; | |
1942 | } | |
190b57fc | 1943 | } |
ce27a443 | 1944 | |
4235b045 | 1945 | tev->point.offset = pev->point.offset; |
04ddd04b | 1946 | tev->point.retprobe = pev->point.retprobe; |
4235b045 | 1947 | tev->nargs = pev->nargs; |
225466f1 SD |
1948 | tev->uprobes = pev->uprobes; |
1949 | ||
4235b045 | 1950 | if (tev->nargs) { |
0e60836b | 1951 | tev->args = zalloc(sizeof(struct probe_trace_arg) |
e334016f MH |
1952 | * tev->nargs); |
1953 | if (tev->args == NULL) { | |
02b95dad MH |
1954 | ret = -ENOMEM; |
1955 | goto error; | |
e334016f | 1956 | } |
48481938 | 1957 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1958 | if (pev->args[i].name) { |
1959 | tev->args[i].name = strdup(pev->args[i].name); | |
1960 | if (tev->args[i].name == NULL) { | |
1961 | ret = -ENOMEM; | |
1962 | goto error; | |
1963 | } | |
1964 | } | |
1965 | tev->args[i].value = strdup(pev->args[i].var); | |
1966 | if (tev->args[i].value == NULL) { | |
1967 | ret = -ENOMEM; | |
1968 | goto error; | |
1969 | } | |
1970 | if (pev->args[i].type) { | |
1971 | tev->args[i].type = strdup(pev->args[i].type); | |
1972 | if (tev->args[i].type == NULL) { | |
1973 | ret = -ENOMEM; | |
1974 | goto error; | |
1975 | } | |
1976 | } | |
48481938 | 1977 | } |
4235b045 MH |
1978 | } |
1979 | ||
225466f1 SD |
1980 | if (pev->uprobes) |
1981 | return 1; | |
1982 | ||
4235b045 | 1983 | /* Currently just checking function name from symbol map */ |
469b9b88 | 1984 | sym = __find_kernel_function_by_name(tev->point.symbol, NULL); |
146a1439 MH |
1985 | if (!sym) { |
1986 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1987 | tev->point.symbol); | |
02b95dad MH |
1988 | ret = -ENOENT; |
1989 | goto error; | |
1c1bc922 PN |
1990 | } else if (tev->point.offset > sym->end - sym->start) { |
1991 | pr_warning("Offset specified is greater than size of %s\n", | |
1992 | tev->point.symbol); | |
1993 | ret = -ENOENT; | |
1994 | goto error; | |
1995 | ||
02b95dad | 1996 | } |
e334016f | 1997 | |
02b95dad MH |
1998 | return 1; |
1999 | error: | |
0e60836b | 2000 | clear_probe_trace_event(tev); |
02b95dad MH |
2001 | free(tev); |
2002 | *tevs = NULL; | |
e334016f | 2003 | return ret; |
4235b045 MH |
2004 | } |
2005 | ||
2006 | struct __event_package { | |
2007 | struct perf_probe_event *pev; | |
0e60836b | 2008 | struct probe_trace_event *tevs; |
4235b045 MH |
2009 | int ntevs; |
2010 | }; | |
2011 | ||
146a1439 | 2012 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
4eced234 | 2013 | int max_tevs, const char *target, bool force_add) |
4235b045 | 2014 | { |
146a1439 | 2015 | int i, j, ret; |
4235b045 MH |
2016 | struct __event_package *pkgs; |
2017 | ||
225466f1 | 2018 | ret = 0; |
e334016f | 2019 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
225466f1 | 2020 | |
e334016f MH |
2021 | if (pkgs == NULL) |
2022 | return -ENOMEM; | |
4235b045 | 2023 | |
225466f1 SD |
2024 | if (!pevs->uprobes) |
2025 | /* Init vmlinux path */ | |
2026 | ret = init_vmlinux(); | |
2027 | else | |
2028 | ret = init_user_exec(); | |
2029 | ||
449e5b24 MH |
2030 | if (ret < 0) { |
2031 | free(pkgs); | |
146a1439 | 2032 | return ret; |
449e5b24 | 2033 | } |
4235b045 MH |
2034 | |
2035 | /* Loop 1: convert all events */ | |
2036 | for (i = 0; i < npevs; i++) { | |
2037 | pkgs[i].pev = &pevs[i]; | |
2038 | /* Convert with or without debuginfo */ | |
0e60836b | 2039 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
2040 | &pkgs[i].tevs, |
2041 | max_tevs, | |
4eced234 | 2042 | target); |
146a1439 MH |
2043 | if (ret < 0) |
2044 | goto end; | |
2045 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
2046 | } |
2047 | ||
4235b045 | 2048 | /* Loop 2: add all events */ |
8635bf6e | 2049 | for (i = 0; i < npevs; i++) { |
0e60836b | 2050 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 | 2051 | pkgs[i].ntevs, force_add); |
fbee632d ACM |
2052 | if (ret < 0) |
2053 | break; | |
2054 | } | |
146a1439 | 2055 | end: |
449e5b24 MH |
2056 | /* Loop 3: cleanup and free trace events */ |
2057 | for (i = 0; i < npevs; i++) { | |
146a1439 | 2058 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 2059 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
449e5b24 MH |
2060 | free(pkgs[i].tevs); |
2061 | } | |
2062 | free(pkgs); | |
146a1439 MH |
2063 | |
2064 | return ret; | |
e0faa8d3 MH |
2065 | } |
2066 | ||
0e60836b | 2067 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
2068 | { |
2069 | char *p; | |
2070 | char buf[128]; | |
4235b045 | 2071 | int ret; |
bbbb521b | 2072 | |
0e60836b | 2073 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
2074 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
2075 | if (ret < 0) | |
2076 | goto error; | |
2077 | ||
bbbb521b | 2078 | p = strchr(buf + 2, ':'); |
146a1439 MH |
2079 | if (!p) { |
2080 | pr_debug("Internal error: %s should have ':' but not.\n", | |
2081 | ent->s); | |
2082 | ret = -ENOTSUP; | |
2083 | goto error; | |
2084 | } | |
bbbb521b MH |
2085 | *p = '/'; |
2086 | ||
4235b045 MH |
2087 | pr_debug("Writing event: %s\n", buf); |
2088 | ret = write(fd, buf, strlen(buf)); | |
44a56040 MH |
2089 | if (ret < 0) { |
2090 | ret = -errno; | |
146a1439 | 2091 | goto error; |
44a56040 | 2092 | } |
146a1439 | 2093 | |
a844d1ef | 2094 | printf("Removed event: %s\n", ent->s); |
146a1439 MH |
2095 | return 0; |
2096 | error: | |
2097 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
2098 | return ret; | |
bbbb521b MH |
2099 | } |
2100 | ||
225466f1 SD |
2101 | static int del_trace_probe_event(int fd, const char *buf, |
2102 | struct strlist *namelist) | |
fa28244d | 2103 | { |
bbbb521b | 2104 | struct str_node *ent, *n; |
225466f1 | 2105 | int ret = -1; |
fa28244d | 2106 | |
bbbb521b MH |
2107 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
2108 | strlist__for_each_safe(ent, n, namelist) | |
2109 | if (strglobmatch(ent->s, buf)) { | |
0e60836b | 2110 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
2111 | if (ret < 0) |
2112 | break; | |
bbbb521b MH |
2113 | strlist__remove(namelist, ent); |
2114 | } | |
2115 | } else { | |
2116 | ent = strlist__find(namelist, buf); | |
2117 | if (ent) { | |
0e60836b | 2118 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
2119 | if (ret >= 0) |
2120 | strlist__remove(namelist, ent); | |
bbbb521b MH |
2121 | } |
2122 | } | |
146a1439 MH |
2123 | |
2124 | return ret; | |
fa28244d MH |
2125 | } |
2126 | ||
146a1439 | 2127 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 2128 | { |
225466f1 SD |
2129 | int ret = -1, ufd = -1, kfd = -1; |
2130 | char buf[128]; | |
fa28244d MH |
2131 | const char *group, *event; |
2132 | char *p, *str; | |
2133 | struct str_node *ent; | |
225466f1 | 2134 | struct strlist *namelist = NULL, *unamelist = NULL; |
146a1439 | 2135 | |
fa28244d | 2136 | /* Get current event names */ |
225466f1 SD |
2137 | kfd = open_kprobe_events(true); |
2138 | if (kfd < 0) | |
2139 | return kfd; | |
2140 | ||
2141 | namelist = get_probe_trace_event_names(kfd, true); | |
2142 | ufd = open_uprobe_events(true); | |
2143 | ||
2144 | if (ufd >= 0) | |
2145 | unamelist = get_probe_trace_event_names(ufd, true); | |
2146 | ||
2147 | if (namelist == NULL && unamelist == NULL) | |
2148 | goto error; | |
fa28244d | 2149 | |
adf365f4 | 2150 | strlist__for_each(ent, dellist) { |
02b95dad MH |
2151 | str = strdup(ent->s); |
2152 | if (str == NULL) { | |
2153 | ret = -ENOMEM; | |
225466f1 | 2154 | goto error; |
02b95dad | 2155 | } |
bbbb521b | 2156 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
2157 | p = strchr(str, ':'); |
2158 | if (p) { | |
2159 | group = str; | |
2160 | *p = '\0'; | |
2161 | event = p + 1; | |
2162 | } else { | |
bbbb521b | 2163 | group = "*"; |
fa28244d MH |
2164 | event = str; |
2165 | } | |
225466f1 SD |
2166 | |
2167 | ret = e_snprintf(buf, 128, "%s:%s", group, event); | |
2168 | if (ret < 0) { | |
2169 | pr_err("Failed to copy event."); | |
2170 | free(str); | |
2171 | goto error; | |
2172 | } | |
2173 | ||
bbbb521b | 2174 | pr_debug("Group: %s, Event: %s\n", group, event); |
225466f1 SD |
2175 | |
2176 | if (namelist) | |
2177 | ret = del_trace_probe_event(kfd, buf, namelist); | |
2178 | ||
2179 | if (unamelist && ret != 0) | |
2180 | ret = del_trace_probe_event(ufd, buf, unamelist); | |
2181 | ||
2182 | if (ret != 0) | |
2183 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
2184 | ||
fa28244d MH |
2185 | free(str); |
2186 | } | |
225466f1 SD |
2187 | |
2188 | error: | |
2189 | if (kfd >= 0) { | |
a23c4dc4 | 2190 | strlist__delete(namelist); |
225466f1 SD |
2191 | close(kfd); |
2192 | } | |
2193 | ||
2194 | if (ufd >= 0) { | |
a23c4dc4 | 2195 | strlist__delete(unamelist); |
225466f1 SD |
2196 | close(ufd); |
2197 | } | |
146a1439 MH |
2198 | |
2199 | return ret; | |
fa28244d | 2200 | } |
225466f1 | 2201 | |
3c42258c MH |
2202 | /* TODO: don't use a global variable for filter ... */ |
2203 | static struct strfilter *available_func_filter; | |
fa28244d | 2204 | |
e80711ca | 2205 | /* |
3c42258c MH |
2206 | * If a symbol corresponds to a function with global binding and |
2207 | * matches filter return 0. For all others return 1. | |
e80711ca | 2208 | */ |
1d037ca1 | 2209 | static int filter_available_functions(struct map *map __maybe_unused, |
3c42258c | 2210 | struct symbol *sym) |
e80711ca | 2211 | { |
3c42258c MH |
2212 | if (sym->binding == STB_GLOBAL && |
2213 | strfilter__compare(available_func_filter, sym->name)) | |
2214 | return 0; | |
2215 | return 1; | |
e80711ca MH |
2216 | } |
2217 | ||
225466f1 SD |
2218 | static int __show_available_funcs(struct map *map) |
2219 | { | |
2220 | if (map__load(map, filter_available_functions)) { | |
2221 | pr_err("Failed to load map.\n"); | |
2222 | return -EINVAL; | |
2223 | } | |
2224 | if (!dso__sorted_by_name(map->dso, map->type)) | |
2225 | dso__sort_by_name(map->dso, map->type); | |
2226 | ||
2227 | dso__fprintf_symbols_by_name(map->dso, map->type, stdout); | |
2228 | return 0; | |
2229 | } | |
2230 | ||
2231 | static int available_kernel_funcs(const char *module) | |
e80711ca MH |
2232 | { |
2233 | struct map *map; | |
2234 | int ret; | |
2235 | ||
e80711ca MH |
2236 | ret = init_vmlinux(); |
2237 | if (ret < 0) | |
2238 | return ret; | |
2239 | ||
225466f1 | 2240 | map = kernel_get_module_map(module); |
e80711ca | 2241 | if (!map) { |
225466f1 | 2242 | pr_err("Failed to find %s map.\n", (module) ? : "kernel"); |
e80711ca MH |
2243 | return -EINVAL; |
2244 | } | |
225466f1 SD |
2245 | return __show_available_funcs(map); |
2246 | } | |
2247 | ||
2248 | static int available_user_funcs(const char *target) | |
2249 | { | |
2250 | struct map *map; | |
2251 | int ret; | |
2252 | ||
2253 | ret = init_user_exec(); | |
2254 | if (ret < 0) | |
2255 | return ret; | |
2256 | ||
2257 | map = dso__new_map(target); | |
2258 | ret = __show_available_funcs(map); | |
2259 | dso__delete(map->dso); | |
2260 | map__delete(map); | |
2261 | return ret; | |
2262 | } | |
2263 | ||
2264 | int show_available_funcs(const char *target, struct strfilter *_filter, | |
2265 | bool user) | |
2266 | { | |
2267 | setup_pager(); | |
3c42258c | 2268 | available_func_filter = _filter; |
225466f1 SD |
2269 | |
2270 | if (!user) | |
2271 | return available_kernel_funcs(target); | |
2272 | ||
2273 | return available_user_funcs(target); | |
2274 | } | |
2275 | ||
2276 | /* | |
2277 | * uprobe_events only accepts address: | |
2278 | * Convert function and any offset to address | |
2279 | */ | |
2280 | static int convert_name_to_addr(struct perf_probe_event *pev, const char *exec) | |
2281 | { | |
2282 | struct perf_probe_point *pp = &pev->point; | |
2283 | struct symbol *sym; | |
2284 | struct map *map = NULL; | |
2285 | char *function = NULL, *name = NULL; | |
2286 | int ret = -EINVAL; | |
2287 | unsigned long long vaddr = 0; | |
2288 | ||
2289 | if (!pp->function) { | |
2290 | pr_warning("No function specified for uprobes"); | |
2291 | goto out; | |
2292 | } | |
2293 | ||
2294 | function = strdup(pp->function); | |
2295 | if (!function) { | |
2296 | pr_warning("Failed to allocate memory by strdup.\n"); | |
2297 | ret = -ENOMEM; | |
2298 | goto out; | |
2299 | } | |
2300 | ||
2301 | name = realpath(exec, NULL); | |
2302 | if (!name) { | |
2303 | pr_warning("Cannot find realpath for %s.\n", exec); | |
2304 | goto out; | |
2305 | } | |
2306 | map = dso__new_map(name); | |
2307 | if (!map) { | |
2308 | pr_warning("Cannot find appropriate DSO for %s.\n", exec); | |
2309 | goto out; | |
2310 | } | |
2311 | available_func_filter = strfilter__new(function, NULL); | |
3c42258c | 2312 | if (map__load(map, filter_available_functions)) { |
e80711ca | 2313 | pr_err("Failed to load map.\n"); |
225466f1 | 2314 | goto out; |
e80711ca | 2315 | } |
e80711ca | 2316 | |
225466f1 SD |
2317 | sym = map__find_symbol_by_name(map, function, NULL); |
2318 | if (!sym) { | |
2319 | pr_warning("Cannot find %s in DSO %s\n", function, exec); | |
2320 | goto out; | |
2321 | } | |
2322 | ||
2323 | if (map->start > sym->start) | |
2324 | vaddr = map->start; | |
2325 | vaddr += sym->start + pp->offset + map->pgoff; | |
2326 | pp->offset = 0; | |
2327 | ||
2328 | if (!pev->event) { | |
2329 | pev->event = function; | |
2330 | function = NULL; | |
2331 | } | |
2332 | if (!pev->group) { | |
1fb89448 | 2333 | char *ptr1, *ptr2, *exec_copy; |
225466f1 SD |
2334 | |
2335 | pev->group = zalloc(sizeof(char *) * 64); | |
1fb89448 DA |
2336 | exec_copy = strdup(exec); |
2337 | if (!exec_copy) { | |
2338 | ret = -ENOMEM; | |
2339 | pr_warning("Failed to copy exec string.\n"); | |
2340 | goto out; | |
2341 | } | |
2342 | ||
2343 | ptr1 = strdup(basename(exec_copy)); | |
225466f1 SD |
2344 | if (ptr1) { |
2345 | ptr2 = strpbrk(ptr1, "-._"); | |
2346 | if (ptr2) | |
2347 | *ptr2 = '\0'; | |
2348 | e_snprintf(pev->group, 64, "%s_%s", PERFPROBE_GROUP, | |
2349 | ptr1); | |
2350 | free(ptr1); | |
2351 | } | |
1fb89448 | 2352 | free(exec_copy); |
225466f1 SD |
2353 | } |
2354 | free(pp->function); | |
2355 | pp->function = zalloc(sizeof(char *) * MAX_PROBE_ARGS); | |
2356 | if (!pp->function) { | |
2357 | ret = -ENOMEM; | |
2358 | pr_warning("Failed to allocate memory by zalloc.\n"); | |
2359 | goto out; | |
2360 | } | |
2361 | e_snprintf(pp->function, MAX_PROBE_ARGS, "0x%llx", vaddr); | |
2362 | ret = 0; | |
2363 | ||
2364 | out: | |
2365 | if (map) { | |
2366 | dso__delete(map->dso); | |
2367 | map__delete(map); | |
2368 | } | |
2369 | if (function) | |
2370 | free(function); | |
2371 | if (name) | |
2372 | free(name); | |
2373 | return ret; | |
e80711ca | 2374 | } |