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" | |
553873e1 | 43 | #include <api/fs/debugfs.h> |
23773ca1 | 44 | #include <api/fs/tracefs.h> |
1d037ca1 | 45 | #include "trace-event.h" /* For __maybe_unused */ |
50656eec | 46 | #include "probe-event.h" |
4235b045 | 47 | #include "probe-finder.h" |
225466f1 | 48 | #include "session.h" |
50656eec MH |
49 | |
50 | #define MAX_CMDLEN 256 | |
50656eec MH |
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); |
981d05ad | 74 | static void clear_probe_trace_event(struct probe_trace_event *tev); |
ee45b6c2 | 75 | static struct machine *host_machine; |
e0faa8d3 | 76 | |
469b9b88 | 77 | /* Initialize symbol maps and path of vmlinux/modules */ |
ee45b6c2 | 78 | static int init_symbol_maps(bool user_only) |
e0faa8d3 | 79 | { |
146a1439 MH |
80 | int ret; |
81 | ||
e0faa8d3 | 82 | symbol_conf.sort_by_name = true; |
680d926a | 83 | symbol_conf.allow_aliases = true; |
0a7e6d1b | 84 | ret = symbol__init(NULL); |
146a1439 MH |
85 | if (ret < 0) { |
86 | pr_debug("Failed to init symbol map.\n"); | |
87 | goto out; | |
88 | } | |
e0faa8d3 | 89 | |
ee45b6c2 MH |
90 | if (host_machine || user_only) /* already initialized */ |
91 | return 0; | |
d28c6223 | 92 | |
ee45b6c2 MH |
93 | if (symbol_conf.vmlinux_name) |
94 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
95 | ||
96 | host_machine = machine__new_host(); | |
97 | if (!host_machine) { | |
98 | pr_debug("machine__new_host() failed.\n"); | |
99 | symbol__exit(); | |
100 | ret = -1; | |
469b9b88 | 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 | ||
ee45b6c2 MH |
108 | static void exit_symbol_maps(void) |
109 | { | |
110 | if (host_machine) { | |
111 | machine__delete(host_machine); | |
112 | host_machine = NULL; | |
113 | } | |
114 | symbol__exit(); | |
115 | } | |
116 | ||
469b9b88 MH |
117 | static struct symbol *__find_kernel_function_by_name(const char *name, |
118 | struct map **mapp) | |
119 | { | |
ee45b6c2 | 120 | return machine__find_kernel_function_by_name(host_machine, name, mapp, |
469b9b88 MH |
121 | NULL); |
122 | } | |
123 | ||
8f33f7de MH |
124 | static struct symbol *__find_kernel_function(u64 addr, struct map **mapp) |
125 | { | |
126 | return machine__find_kernel_function(host_machine, addr, mapp, NULL); | |
127 | } | |
128 | ||
129 | static struct ref_reloc_sym *kernel_get_ref_reloc_sym(void) | |
130 | { | |
131 | /* kmap->ref_reloc_sym should be set if host_machine is initialized */ | |
132 | struct kmap *kmap; | |
133 | ||
134 | if (map__load(host_machine->vmlinux_maps[MAP__FUNCTION], NULL) < 0) | |
135 | return NULL; | |
136 | ||
137 | kmap = map__kmap(host_machine->vmlinux_maps[MAP__FUNCTION]); | |
ba92732e WN |
138 | if (!kmap) |
139 | return NULL; | |
8f33f7de MH |
140 | return kmap->ref_reloc_sym; |
141 | } | |
142 | ||
143 | static u64 kernel_get_symbol_address_by_name(const char *name, bool reloc) | |
144 | { | |
145 | struct ref_reloc_sym *reloc_sym; | |
146 | struct symbol *sym; | |
147 | struct map *map; | |
148 | ||
149 | /* ref_reloc_sym is just a label. Need a special fix*/ | |
150 | reloc_sym = kernel_get_ref_reloc_sym(); | |
151 | if (reloc_sym && strcmp(name, reloc_sym->name) == 0) | |
152 | return (reloc) ? reloc_sym->addr : reloc_sym->unrelocated_addr; | |
153 | else { | |
154 | sym = __find_kernel_function_by_name(name, &map); | |
155 | if (sym) | |
156 | return map->unmap_ip(map, sym->start) - | |
f56847c2 | 157 | ((reloc) ? 0 : map->reloc); |
8f33f7de MH |
158 | } |
159 | return 0; | |
160 | } | |
161 | ||
e80711ca MH |
162 | static struct map *kernel_get_module_map(const char *module) |
163 | { | |
164 | struct rb_node *nd; | |
ee45b6c2 | 165 | struct map_groups *grp = &host_machine->kmaps; |
e80711ca | 166 | |
14a8fd7c MH |
167 | /* A file path -- this is an offline module */ |
168 | if (module && strchr(module, '/')) | |
ee45b6c2 | 169 | return machine__new_module(host_machine, 0, module); |
14a8fd7c | 170 | |
e80711ca MH |
171 | if (!module) |
172 | module = "kernel"; | |
173 | ||
174 | for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) { | |
175 | struct map *pos = rb_entry(nd, struct map, rb_node); | |
176 | if (strncmp(pos->dso->short_name + 1, module, | |
177 | pos->dso->short_name_len - 2) == 0) { | |
178 | return pos; | |
179 | } | |
180 | } | |
181 | return NULL; | |
182 | } | |
183 | ||
9b118aca MH |
184 | static struct map *get_target_map(const char *target, bool user) |
185 | { | |
186 | /* Init maps of given executable or kernel */ | |
187 | if (user) | |
188 | return dso__new_map(target); | |
189 | else | |
190 | return kernel_get_module_map(target); | |
191 | } | |
192 | ||
193 | static void put_target_map(struct map *map, bool user) | |
194 | { | |
195 | if (map && user) { | |
196 | /* Only the user map needs to be released */ | |
197 | dso__delete(map->dso); | |
198 | map__delete(map); | |
199 | } | |
200 | } | |
201 | ||
202 | ||
e80711ca | 203 | static struct dso *kernel_get_module_dso(const char *module) |
469b9b88 MH |
204 | { |
205 | struct dso *dso; | |
fd930ff9 FBH |
206 | struct map *map; |
207 | const char *vmlinux_name; | |
469b9b88 MH |
208 | |
209 | if (module) { | |
8fa7d87f WL |
210 | list_for_each_entry(dso, &host_machine->kernel_dsos.head, |
211 | node) { | |
469b9b88 MH |
212 | if (strncmp(dso->short_name + 1, module, |
213 | dso->short_name_len - 2) == 0) | |
214 | goto found; | |
215 | } | |
216 | pr_debug("Failed to find module %s.\n", module); | |
217 | return NULL; | |
fd930ff9 FBH |
218 | } |
219 | ||
ee45b6c2 | 220 | map = host_machine->vmlinux_maps[MAP__FUNCTION]; |
fd930ff9 FBH |
221 | dso = map->dso; |
222 | ||
223 | vmlinux_name = symbol_conf.vmlinux_name; | |
224 | if (vmlinux_name) { | |
5230fb7d | 225 | if (dso__load_vmlinux(dso, map, vmlinux_name, false, NULL) <= 0) |
fd930ff9 | 226 | return NULL; |
469b9b88 | 227 | } else { |
c3a34e06 | 228 | if (dso__load_vmlinux_path(dso, map, NULL) <= 0) { |
469b9b88 MH |
229 | pr_debug("Failed to load kernel map.\n"); |
230 | return NULL; | |
231 | } | |
232 | } | |
233 | found: | |
e80711ca MH |
234 | return dso; |
235 | } | |
236 | ||
237 | const char *kernel_get_module_path(const char *module) | |
238 | { | |
239 | struct dso *dso = kernel_get_module_dso(module); | |
240 | return (dso) ? dso->long_name : NULL; | |
469b9b88 MH |
241 | } |
242 | ||
fb7345bb MH |
243 | static int convert_exec_to_group(const char *exec, char **result) |
244 | { | |
245 | char *ptr1, *ptr2, *exec_copy; | |
246 | char buf[64]; | |
247 | int ret; | |
248 | ||
249 | exec_copy = strdup(exec); | |
250 | if (!exec_copy) | |
251 | return -ENOMEM; | |
252 | ||
253 | ptr1 = basename(exec_copy); | |
254 | if (!ptr1) { | |
255 | ret = -EINVAL; | |
256 | goto out; | |
257 | } | |
258 | ||
259 | ptr2 = strpbrk(ptr1, "-._"); | |
260 | if (ptr2) | |
261 | *ptr2 = '\0'; | |
262 | ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1); | |
263 | if (ret < 0) | |
264 | goto out; | |
265 | ||
266 | *result = strdup(buf); | |
267 | ret = *result ? 0 : -ENOMEM; | |
268 | ||
269 | out: | |
270 | free(exec_copy); | |
271 | return ret; | |
272 | } | |
273 | ||
9b118aca MH |
274 | static void clear_perf_probe_point(struct perf_probe_point *pp) |
275 | { | |
276 | free(pp->file); | |
277 | free(pp->function); | |
278 | free(pp->lazy_line); | |
279 | } | |
280 | ||
eb948e50 MH |
281 | static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs) |
282 | { | |
283 | int i; | |
284 | ||
285 | for (i = 0; i < ntevs; i++) | |
286 | clear_probe_trace_event(tevs + i); | |
287 | } | |
288 | ||
89fe808a | 289 | #ifdef HAVE_DWARF_SUPPORT |
9b118aca MH |
290 | /* |
291 | * Some binaries like glibc have special symbols which are on the symbol | |
292 | * table, but not in the debuginfo. If we can find the address of the | |
293 | * symbol from map, we can translate the address back to the probe point. | |
294 | */ | |
295 | static int find_alternative_probe_point(struct debuginfo *dinfo, | |
296 | struct perf_probe_point *pp, | |
297 | struct perf_probe_point *result, | |
298 | const char *target, bool uprobes) | |
299 | { | |
300 | struct map *map = NULL; | |
301 | struct symbol *sym; | |
302 | u64 address = 0; | |
303 | int ret = -ENOENT; | |
304 | ||
305 | /* This can work only for function-name based one */ | |
306 | if (!pp->function || pp->file) | |
307 | return -ENOTSUP; | |
308 | ||
309 | map = get_target_map(target, uprobes); | |
310 | if (!map) | |
311 | return -EINVAL; | |
312 | ||
313 | /* Find the address of given function */ | |
314 | map__for_each_symbol_by_name(map, pp->function, sym) { | |
e6d7c91c MH |
315 | if (uprobes) |
316 | address = sym->start; | |
317 | else | |
318 | address = map->unmap_ip(map, sym->start); | |
e578da3b | 319 | break; |
9b118aca MH |
320 | } |
321 | if (!address) { | |
322 | ret = -ENOENT; | |
323 | goto out; | |
324 | } | |
f6c15621 WN |
325 | pr_debug("Symbol %s address found : %" PRIx64 "\n", |
326 | pp->function, address); | |
9b118aca MH |
327 | |
328 | ret = debuginfo__find_probe_point(dinfo, (unsigned long)address, | |
329 | result); | |
330 | if (ret <= 0) | |
331 | ret = (!ret) ? -ENOENT : ret; | |
332 | else { | |
333 | result->offset += pp->offset; | |
334 | result->line += pp->line; | |
9d7b45c5 | 335 | result->retprobe = pp->retprobe; |
9b118aca MH |
336 | ret = 0; |
337 | } | |
338 | ||
339 | out: | |
340 | put_target_map(map, uprobes); | |
341 | return ret; | |
342 | ||
343 | } | |
344 | ||
345 | static int get_alternative_probe_event(struct debuginfo *dinfo, | |
346 | struct perf_probe_event *pev, | |
347 | struct perf_probe_point *tmp, | |
348 | const char *target) | |
349 | { | |
350 | int ret; | |
351 | ||
352 | memcpy(tmp, &pev->point, sizeof(*tmp)); | |
353 | memset(&pev->point, 0, sizeof(pev->point)); | |
354 | ret = find_alternative_probe_point(dinfo, tmp, &pev->point, | |
355 | target, pev->uprobes); | |
356 | if (ret < 0) | |
357 | memcpy(&pev->point, tmp, sizeof(*tmp)); | |
358 | ||
359 | return ret; | |
360 | } | |
a15ad2f5 | 361 | |
811dd2ae MH |
362 | static int get_alternative_line_range(struct debuginfo *dinfo, |
363 | struct line_range *lr, | |
364 | const char *target, bool user) | |
365 | { | |
6d4a4896 DA |
366 | struct perf_probe_point pp = { .function = lr->function, |
367 | .file = lr->file, | |
368 | .line = lr->start }; | |
369 | struct perf_probe_point result; | |
811dd2ae MH |
370 | int ret, len = 0; |
371 | ||
6d4a4896 DA |
372 | memset(&result, 0, sizeof(result)); |
373 | ||
811dd2ae MH |
374 | if (lr->end != INT_MAX) |
375 | len = lr->end - lr->start; | |
376 | ret = find_alternative_probe_point(dinfo, &pp, &result, | |
377 | target, user); | |
378 | if (!ret) { | |
379 | lr->function = result.function; | |
380 | lr->file = result.file; | |
381 | lr->start = result.line; | |
382 | if (lr->end != INT_MAX) | |
383 | lr->end = lr->start + len; | |
384 | clear_perf_probe_point(&pp); | |
385 | } | |
386 | return ret; | |
387 | } | |
388 | ||
ff741783 | 389 | /* Open new debuginfo of given module */ |
92561cb7 | 390 | static struct debuginfo *open_debuginfo(const char *module, bool silent) |
e0faa8d3 | 391 | { |
a15ad2f5 | 392 | const char *path = module; |
92561cb7 | 393 | struct debuginfo *ret; |
ff741783 | 394 | |
a15ad2f5 | 395 | if (!module || !strchr(module, '/')) { |
14a8fd7c | 396 | path = kernel_get_module_path(module); |
14a8fd7c | 397 | if (!path) { |
92561cb7 MH |
398 | if (!silent) |
399 | pr_err("Failed to find path of %s module.\n", | |
400 | module ?: "kernel"); | |
14a8fd7c MH |
401 | return NULL; |
402 | } | |
e0faa8d3 | 403 | } |
92561cb7 MH |
404 | ret = debuginfo__new(path); |
405 | if (!ret && !silent) { | |
406 | pr_warning("The %s file has no debug information.\n", path); | |
407 | if (!module || !strtailcmp(path, ".ko")) | |
408 | pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, "); | |
409 | else | |
410 | pr_warning("Rebuild with -g, "); | |
411 | pr_warning("or install an appropriate debuginfo package.\n"); | |
412 | } | |
413 | return ret; | |
e0faa8d3 | 414 | } |
4b4da7f7 | 415 | |
92561cb7 | 416 | |
99ca4233 MH |
417 | static int get_text_start_address(const char *exec, unsigned long *address) |
418 | { | |
419 | Elf *elf; | |
420 | GElf_Ehdr ehdr; | |
421 | GElf_Shdr shdr; | |
422 | int fd, ret = -ENOENT; | |
423 | ||
424 | fd = open(exec, O_RDONLY); | |
425 | if (fd < 0) | |
426 | return -errno; | |
427 | ||
428 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
429 | if (elf == NULL) | |
430 | return -EINVAL; | |
431 | ||
432 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
433 | goto out; | |
434 | ||
435 | if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL)) | |
436 | goto out; | |
437 | ||
438 | *address = shdr.sh_addr - shdr.sh_offset; | |
439 | ret = 0; | |
440 | out: | |
441 | elf_end(elf); | |
442 | return ret; | |
443 | } | |
444 | ||
5a6f6314 MH |
445 | /* |
446 | * Convert trace point to probe point with debuginfo | |
447 | */ | |
448 | static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp, | |
449 | struct perf_probe_point *pp, | |
450 | bool is_kprobe) | |
451 | { | |
452 | struct debuginfo *dinfo = NULL; | |
453 | unsigned long stext = 0; | |
454 | u64 addr = tp->address; | |
455 | int ret = -ENOENT; | |
456 | ||
457 | /* convert the address to dwarf address */ | |
458 | if (!is_kprobe) { | |
459 | if (!addr) { | |
460 | ret = -EINVAL; | |
461 | goto error; | |
462 | } | |
463 | ret = get_text_start_address(tp->module, &stext); | |
464 | if (ret < 0) | |
465 | goto error; | |
466 | addr += stext; | |
467 | } else { | |
468 | addr = kernel_get_symbol_address_by_name(tp->symbol, false); | |
469 | if (addr == 0) | |
470 | goto error; | |
471 | addr += tp->offset; | |
472 | } | |
473 | ||
474 | pr_debug("try to find information at %" PRIx64 " in %s\n", addr, | |
475 | tp->module ? : "kernel"); | |
476 | ||
92561cb7 | 477 | dinfo = open_debuginfo(tp->module, verbose == 0); |
5a6f6314 MH |
478 | if (dinfo) { |
479 | ret = debuginfo__find_probe_point(dinfo, | |
480 | (unsigned long)addr, pp); | |
481 | debuginfo__delete(dinfo); | |
92561cb7 | 482 | } else |
5a6f6314 | 483 | ret = -ENOENT; |
5a6f6314 MH |
484 | |
485 | if (ret > 0) { | |
486 | pp->retprobe = tp->retprobe; | |
487 | return 0; | |
488 | } | |
489 | error: | |
490 | pr_debug("Failed to find corresponding probes from debuginfo.\n"); | |
491 | return ret ? : -ENOENT; | |
492 | } | |
493 | ||
fb7345bb MH |
494 | static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs, |
495 | int ntevs, const char *exec) | |
496 | { | |
497 | int i, ret = 0; | |
eb948e50 | 498 | unsigned long stext = 0; |
fb7345bb MH |
499 | |
500 | if (!exec) | |
501 | return 0; | |
502 | ||
503 | ret = get_text_start_address(exec, &stext); | |
504 | if (ret < 0) | |
505 | return ret; | |
506 | ||
507 | for (i = 0; i < ntevs && ret >= 0; i++) { | |
981a2379 | 508 | /* point.address is the addres of point.symbol + point.offset */ |
eb948e50 | 509 | tevs[i].point.address -= stext; |
fb7345bb | 510 | tevs[i].point.module = strdup(exec); |
eb948e50 | 511 | if (!tevs[i].point.module) { |
fb7345bb MH |
512 | ret = -ENOMEM; |
513 | break; | |
514 | } | |
515 | tevs[i].uprobes = true; | |
516 | } | |
517 | ||
518 | return ret; | |
519 | } | |
520 | ||
190b57fc MH |
521 | static int add_module_to_probe_trace_events(struct probe_trace_event *tevs, |
522 | int ntevs, const char *module) | |
523 | { | |
14a8fd7c MH |
524 | int i, ret = 0; |
525 | char *tmp; | |
526 | ||
527 | if (!module) | |
528 | return 0; | |
529 | ||
530 | tmp = strrchr(module, '/'); | |
531 | if (tmp) { | |
532 | /* This is a module path -- get the module name */ | |
533 | module = strdup(tmp + 1); | |
534 | if (!module) | |
535 | return -ENOMEM; | |
536 | tmp = strchr(module, '.'); | |
537 | if (tmp) | |
538 | *tmp = '\0'; | |
539 | tmp = (char *)module; /* For free() */ | |
540 | } | |
541 | ||
190b57fc MH |
542 | for (i = 0; i < ntevs; i++) { |
543 | tevs[i].point.module = strdup(module); | |
14a8fd7c MH |
544 | if (!tevs[i].point.module) { |
545 | ret = -ENOMEM; | |
546 | break; | |
547 | } | |
190b57fc | 548 | } |
14a8fd7c | 549 | |
f5385650 | 550 | free(tmp); |
14a8fd7c | 551 | return ret; |
190b57fc MH |
552 | } |
553 | ||
dfef99cd MH |
554 | /* Post processing the probe events */ |
555 | static int post_process_probe_trace_events(struct probe_trace_event *tevs, | |
556 | int ntevs, const char *module, | |
557 | bool uprobe) | |
558 | { | |
559 | struct ref_reloc_sym *reloc_sym; | |
560 | char *tmp; | |
561 | int i; | |
562 | ||
563 | if (uprobe) | |
564 | return add_exec_to_probe_trace_events(tevs, ntevs, module); | |
565 | ||
566 | /* Note that currently ref_reloc_sym based probe is not for drivers */ | |
567 | if (module) | |
568 | return add_module_to_probe_trace_events(tevs, ntevs, module); | |
569 | ||
8f33f7de | 570 | reloc_sym = kernel_get_ref_reloc_sym(); |
dfef99cd MH |
571 | if (!reloc_sym) { |
572 | pr_warning("Relocated base symbol is not found!\n"); | |
573 | return -EINVAL; | |
574 | } | |
575 | ||
576 | for (i = 0; i < ntevs; i++) { | |
25dd9171 | 577 | if (tevs[i].point.address && !tevs[i].point.retprobe) { |
dfef99cd MH |
578 | tmp = strdup(reloc_sym->name); |
579 | if (!tmp) | |
580 | return -ENOMEM; | |
581 | free(tevs[i].point.symbol); | |
582 | tevs[i].point.symbol = tmp; | |
583 | tevs[i].point.offset = tevs[i].point.address - | |
584 | reloc_sym->unrelocated_addr; | |
585 | } | |
586 | } | |
587 | return 0; | |
588 | } | |
589 | ||
4b4da7f7 | 590 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 591 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
190b57fc | 592 | struct probe_trace_event **tevs, |
4eced234 | 593 | int max_tevs, const char *target) |
4b4da7f7 MH |
594 | { |
595 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
9b118aca | 596 | struct perf_probe_point tmp; |
225466f1 | 597 | struct debuginfo *dinfo; |
190b57fc | 598 | int ntevs, ret = 0; |
4b4da7f7 | 599 | |
92561cb7 | 600 | dinfo = open_debuginfo(target, !need_dwarf); |
225466f1 | 601 | |
ff741783 | 602 | if (!dinfo) { |
92561cb7 | 603 | if (need_dwarf) |
ff741783 | 604 | return -ENOENT; |
ff741783 | 605 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
606 | return 0; |
607 | } | |
608 | ||
dfef99cd | 609 | pr_debug("Try to find probe point from debuginfo.\n"); |
ff741783 MH |
610 | /* Searching trace events corresponding to a probe event */ |
611 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs); | |
612 | ||
9b118aca MH |
613 | if (ntevs == 0) { /* Not found, retry with an alternative */ |
614 | ret = get_alternative_probe_event(dinfo, pev, &tmp, target); | |
615 | if (!ret) { | |
616 | ntevs = debuginfo__find_trace_events(dinfo, pev, | |
617 | tevs, max_tevs); | |
618 | /* | |
619 | * Write back to the original probe_event for | |
620 | * setting appropriate (user given) event name | |
621 | */ | |
622 | clear_perf_probe_point(&pev->point); | |
623 | memcpy(&pev->point, &tmp, sizeof(tmp)); | |
624 | } | |
625 | } | |
626 | ||
ff741783 | 627 | debuginfo__delete(dinfo); |
4b4da7f7 | 628 | |
146a1439 | 629 | if (ntevs > 0) { /* Succeeded to find trace events */ |
dfef99cd MH |
630 | pr_debug("Found %d probe_trace_events.\n", ntevs); |
631 | ret = post_process_probe_trace_events(*tevs, ntevs, | |
632 | target, pev->uprobes); | |
981d05ad MH |
633 | if (ret < 0) { |
634 | clear_probe_trace_events(*tevs, ntevs); | |
635 | zfree(tevs); | |
636 | } | |
190b57fc | 637 | return ret < 0 ? ret : ntevs; |
146a1439 | 638 | } |
4b4da7f7 | 639 | |
146a1439 | 640 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
0687eba7 | 641 | pr_warning("Probe point '%s' not found.\n", |
146a1439 | 642 | synthesize_perf_probe_point(&pev->point)); |
0687eba7 | 643 | return -ENOENT; |
146a1439 MH |
644 | } |
645 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
646 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
647 | if (ntevs == -EBADF) { | |
648 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
649 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
650 | if (!need_dwarf) { | |
0e43e5d2 | 651 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
652 | return 0; |
653 | } | |
4b4da7f7 | 654 | } |
15eca306 | 655 | return ntevs; |
4b4da7f7 MH |
656 | } |
657 | ||
658 | #define LINEBUF_SIZE 256 | |
659 | #define NR_ADDITIONAL_LINES 2 | |
660 | ||
fde52dbd | 661 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 | 662 | { |
5f03cba4 | 663 | char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE]; |
befe3414 FBH |
664 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
665 | const char *prefix = NULL; | |
4b4da7f7 | 666 | |
befe3414 | 667 | do { |
4b4da7f7 MH |
668 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
669 | goto error; | |
befe3414 FBH |
670 | if (skip) |
671 | continue; | |
672 | if (!prefix) { | |
673 | prefix = show_num ? "%7d " : " "; | |
674 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 675 | } |
befe3414 FBH |
676 | color_fprintf(stdout, color, "%s", buf); |
677 | ||
678 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 679 | |
fde52dbd | 680 | return 1; |
4b4da7f7 | 681 | error: |
fde52dbd | 682 | if (ferror(fp)) { |
5f03cba4 MH |
683 | pr_warning("File read error: %s\n", |
684 | strerror_r(errno, sbuf, sizeof(sbuf))); | |
fde52dbd FBH |
685 | return -1; |
686 | } | |
687 | return 0; | |
688 | } | |
146a1439 | 689 | |
fde52dbd FBH |
690 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
691 | { | |
692 | int rv = __show_one_line(fp, l, skip, show_num); | |
693 | if (rv == 0) { | |
694 | pr_warning("Source file is shorter than expected.\n"); | |
695 | rv = -1; | |
696 | } | |
697 | return rv; | |
4b4da7f7 MH |
698 | } |
699 | ||
fde52dbd FBH |
700 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
701 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
702 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
703 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
704 | ||
4b4da7f7 MH |
705 | /* |
706 | * Show line-range always requires debuginfo to find source file and | |
707 | * line number. | |
708 | */ | |
811dd2ae MH |
709 | static int __show_line_range(struct line_range *lr, const char *module, |
710 | bool user) | |
4b4da7f7 | 711 | { |
d3b63d7a | 712 | int l = 1; |
5a62257a | 713 | struct int_node *ln; |
ff741783 | 714 | struct debuginfo *dinfo; |
4b4da7f7 | 715 | FILE *fp; |
ff741783 | 716 | int ret; |
7cf0b79e | 717 | char *tmp; |
5f03cba4 | 718 | char sbuf[STRERR_BUFSIZE]; |
4b4da7f7 MH |
719 | |
720 | /* Search a line range */ | |
92561cb7 MH |
721 | dinfo = open_debuginfo(module, false); |
722 | if (!dinfo) | |
ff741783 | 723 | return -ENOENT; |
146a1439 | 724 | |
ff741783 | 725 | ret = debuginfo__find_line_range(dinfo, lr); |
811dd2ae MH |
726 | if (!ret) { /* Not found, retry with an alternative */ |
727 | ret = get_alternative_line_range(dinfo, lr, module, user); | |
728 | if (!ret) | |
729 | ret = debuginfo__find_line_range(dinfo, lr); | |
730 | } | |
ff741783 | 731 | debuginfo__delete(dinfo); |
5ee05b88 | 732 | if (ret == 0 || ret == -ENOENT) { |
146a1439 MH |
733 | pr_warning("Specified source line is not found.\n"); |
734 | return -ENOENT; | |
735 | } else if (ret < 0) { | |
5ee05b88 | 736 | pr_warning("Debuginfo analysis failed.\n"); |
146a1439 MH |
737 | return ret; |
738 | } | |
4b4da7f7 | 739 | |
7cf0b79e MH |
740 | /* Convert source file path */ |
741 | tmp = lr->path; | |
6a330a3c | 742 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
a78604de HK |
743 | |
744 | /* Free old path when new path is assigned */ | |
745 | if (tmp != lr->path) | |
746 | free(tmp); | |
747 | ||
7cf0b79e | 748 | if (ret < 0) { |
5ee05b88 | 749 | pr_warning("Failed to find source file path.\n"); |
7cf0b79e MH |
750 | return ret; |
751 | } | |
752 | ||
4b4da7f7 MH |
753 | setup_pager(); |
754 | ||
755 | if (lr->function) | |
8737ebde | 756 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
757 | lr->start - lr->offset); |
758 | else | |
62c15fc4 | 759 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
760 | |
761 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
762 | if (fp == NULL) { |
763 | pr_warning("Failed to open %s: %s\n", lr->path, | |
5f03cba4 | 764 | strerror_r(errno, sbuf, sizeof(sbuf))); |
146a1439 MH |
765 | return -errno; |
766 | } | |
4b4da7f7 | 767 | /* Skip to starting line number */ |
44b81e92 | 768 | while (l < lr->start) { |
fde52dbd | 769 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
770 | if (ret < 0) |
771 | goto end; | |
772 | } | |
4b4da7f7 | 773 | |
5a62257a MH |
774 | intlist__for_each(ln, lr->line_list) { |
775 | for (; ln->i > l; l++) { | |
fde52dbd | 776 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
777 | if (ret < 0) |
778 | goto end; | |
779 | } | |
fde52dbd | 780 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
781 | if (ret < 0) |
782 | goto end; | |
4b4da7f7 MH |
783 | } |
784 | ||
785 | if (lr->end == INT_MAX) | |
786 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
787 | while (l <= lr->end) { |
788 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
789 | if (ret <= 0) | |
44b81e92 FBH |
790 | break; |
791 | } | |
146a1439 | 792 | end: |
4b4da7f7 | 793 | fclose(fp); |
146a1439 | 794 | return ret; |
4b4da7f7 MH |
795 | } |
796 | ||
2b394bc4 | 797 | int show_line_range(struct line_range *lr, const char *module, bool user) |
ee45b6c2 MH |
798 | { |
799 | int ret; | |
800 | ||
2b394bc4 | 801 | ret = init_symbol_maps(user); |
ee45b6c2 MH |
802 | if (ret < 0) |
803 | return ret; | |
811dd2ae | 804 | ret = __show_line_range(lr, module, user); |
ee45b6c2 MH |
805 | exit_symbol_maps(); |
806 | ||
807 | return ret; | |
808 | } | |
809 | ||
ff741783 MH |
810 | static int show_available_vars_at(struct debuginfo *dinfo, |
811 | struct perf_probe_event *pev, | |
bd09d7b5 | 812 | int max_vls, struct strfilter *_filter, |
9b118aca | 813 | bool externs, const char *target) |
cf6eb489 MH |
814 | { |
815 | char *buf; | |
bd09d7b5 | 816 | int ret, i, nvars; |
cf6eb489 MH |
817 | struct str_node *node; |
818 | struct variable_list *vls = NULL, *vl; | |
9b118aca | 819 | struct perf_probe_point tmp; |
bd09d7b5 | 820 | const char *var; |
cf6eb489 MH |
821 | |
822 | buf = synthesize_perf_probe_point(&pev->point); | |
823 | if (!buf) | |
824 | return -EINVAL; | |
825 | pr_debug("Searching variables at %s\n", buf); | |
826 | ||
ff741783 MH |
827 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls, |
828 | max_vls, externs); | |
9b118aca MH |
829 | if (!ret) { /* Not found, retry with an alternative */ |
830 | ret = get_alternative_probe_event(dinfo, pev, &tmp, target); | |
831 | if (!ret) { | |
832 | ret = debuginfo__find_available_vars_at(dinfo, pev, | |
833 | &vls, max_vls, externs); | |
834 | /* Release the old probe_point */ | |
835 | clear_perf_probe_point(&tmp); | |
836 | } | |
837 | } | |
bd09d7b5 | 838 | if (ret <= 0) { |
69e96eaa MH |
839 | if (ret == 0 || ret == -ENOENT) { |
840 | pr_err("Failed to find the address of %s\n", buf); | |
841 | ret = -ENOENT; | |
842 | } else | |
843 | pr_warning("Debuginfo analysis failed.\n"); | |
bd09d7b5 MH |
844 | goto end; |
845 | } | |
69e96eaa | 846 | |
bd09d7b5 MH |
847 | /* Some variables are found */ |
848 | fprintf(stdout, "Available variables at %s\n", buf); | |
849 | for (i = 0; i < ret; i++) { | |
850 | vl = &vls[i]; | |
851 | /* | |
852 | * A probe point might be converted to | |
853 | * several trace points. | |
854 | */ | |
855 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
856 | vl->point.offset); | |
74cf249d | 857 | zfree(&vl->point.symbol); |
bd09d7b5 MH |
858 | nvars = 0; |
859 | if (vl->vars) { | |
860 | strlist__for_each(node, vl->vars) { | |
861 | var = strchr(node->s, '\t') + 1; | |
862 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 863 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
864 | nvars++; |
865 | } | |
866 | } | |
867 | strlist__delete(vl->vars); | |
cf6eb489 | 868 | } |
bd09d7b5 MH |
869 | if (nvars == 0) |
870 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
871 | } | |
872 | free(vls); | |
873 | end: | |
cf6eb489 MH |
874 | free(buf); |
875 | return ret; | |
876 | } | |
877 | ||
878 | /* Show available variables on given probe point */ | |
879 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
bd09d7b5 MH |
880 | int max_vls, const char *module, |
881 | struct strfilter *_filter, bool externs) | |
cf6eb489 | 882 | { |
ff741783 MH |
883 | int i, ret = 0; |
884 | struct debuginfo *dinfo; | |
cf6eb489 | 885 | |
2b394bc4 | 886 | ret = init_symbol_maps(pevs->uprobes); |
cf6eb489 MH |
887 | if (ret < 0) |
888 | return ret; | |
889 | ||
92561cb7 | 890 | dinfo = open_debuginfo(module, false); |
ff741783 | 891 | if (!dinfo) { |
ee45b6c2 MH |
892 | ret = -ENOENT; |
893 | goto out; | |
ff741783 MH |
894 | } |
895 | ||
cf6eb489 MH |
896 | setup_pager(); |
897 | ||
ff741783 MH |
898 | for (i = 0; i < npevs && ret >= 0; i++) |
899 | ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter, | |
9b118aca | 900 | externs, module); |
ff741783 MH |
901 | |
902 | debuginfo__delete(dinfo); | |
ee45b6c2 MH |
903 | out: |
904 | exit_symbol_maps(); | |
cf6eb489 MH |
905 | return ret; |
906 | } | |
907 | ||
89fe808a | 908 | #else /* !HAVE_DWARF_SUPPORT */ |
4b4da7f7 | 909 | |
5a6f6314 MH |
910 | static int |
911 | find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused, | |
912 | struct perf_probe_point *pp __maybe_unused, | |
913 | bool is_kprobe __maybe_unused) | |
4b4da7f7 | 914 | { |
5a6f6314 | 915 | return -ENOSYS; |
4b4da7f7 MH |
916 | } |
917 | ||
0e60836b | 918 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
1d037ca1 | 919 | struct probe_trace_event **tevs __maybe_unused, |
1d027ee9 ACM |
920 | int max_tevs __maybe_unused, |
921 | const char *target __maybe_unused) | |
4b4da7f7 | 922 | { |
146a1439 MH |
923 | if (perf_probe_event_need_dwarf(pev)) { |
924 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
925 | return -ENOSYS; | |
926 | } | |
225466f1 | 927 | |
4b4da7f7 MH |
928 | return 0; |
929 | } | |
930 | ||
1d037ca1 | 931 | int show_line_range(struct line_range *lr __maybe_unused, |
2b394bc4 MH |
932 | const char *module __maybe_unused, |
933 | bool user __maybe_unused) | |
4b4da7f7 | 934 | { |
146a1439 MH |
935 | pr_warning("Debuginfo-analysis is not supported.\n"); |
936 | return -ENOSYS; | |
4b4da7f7 MH |
937 | } |
938 | ||
1d037ca1 IT |
939 | int show_available_vars(struct perf_probe_event *pevs __maybe_unused, |
940 | int npevs __maybe_unused, int max_vls __maybe_unused, | |
941 | const char *module __maybe_unused, | |
942 | struct strfilter *filter __maybe_unused, | |
943 | bool externs __maybe_unused) | |
cf6eb489 MH |
944 | { |
945 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
946 | return -ENOSYS; | |
947 | } | |
e0faa8d3 MH |
948 | #endif |
949 | ||
e53b00d3 MH |
950 | void line_range__clear(struct line_range *lr) |
951 | { | |
e53b00d3 MH |
952 | free(lr->function); |
953 | free(lr->file); | |
954 | free(lr->path); | |
955 | free(lr->comp_dir); | |
5a62257a | 956 | intlist__delete(lr->line_list); |
e53b00d3 MH |
957 | memset(lr, 0, sizeof(*lr)); |
958 | } | |
959 | ||
5a62257a | 960 | int line_range__init(struct line_range *lr) |
e53b00d3 MH |
961 | { |
962 | memset(lr, 0, sizeof(*lr)); | |
5a62257a MH |
963 | lr->line_list = intlist__new(NULL); |
964 | if (!lr->line_list) | |
965 | return -ENOMEM; | |
966 | else | |
967 | return 0; | |
e53b00d3 MH |
968 | } |
969 | ||
21dd9ae5 FBH |
970 | static int parse_line_num(char **ptr, int *val, const char *what) |
971 | { | |
972 | const char *start = *ptr; | |
973 | ||
974 | errno = 0; | |
975 | *val = strtol(*ptr, ptr, 0); | |
976 | if (errno || *ptr == start) { | |
977 | semantic_error("'%s' is not a valid number.\n", what); | |
978 | return -EINVAL; | |
979 | } | |
980 | return 0; | |
981 | } | |
982 | ||
9d95b580 FBH |
983 | /* |
984 | * Stuff 'lr' according to the line range described by 'arg'. | |
985 | * The line range syntax is described by: | |
986 | * | |
987 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 988 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 989 | */ |
146a1439 | 990 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 991 | { |
e116dfa1 | 992 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
993 | int err; |
994 | ||
995 | if (!name) | |
996 | return -ENOMEM; | |
997 | ||
998 | lr->start = 0; | |
999 | lr->end = INT_MAX; | |
1000 | ||
1001 | range = strchr(name, ':'); | |
1002 | if (range) { | |
1003 | *range++ = '\0'; | |
1004 | ||
1005 | err = parse_line_num(&range, &lr->start, "start line"); | |
1006 | if (err) | |
1007 | goto err; | |
1008 | ||
1009 | if (*range == '+' || *range == '-') { | |
1010 | const char c = *range++; | |
1011 | ||
1012 | err = parse_line_num(&range, &lr->end, "end line"); | |
1013 | if (err) | |
1014 | goto err; | |
1015 | ||
1016 | if (c == '+') { | |
1017 | lr->end += lr->start; | |
1018 | /* | |
1019 | * Adjust the number of lines here. | |
1020 | * If the number of lines == 1, the | |
1021 | * the end of line should be equal to | |
1022 | * the start of line. | |
1023 | */ | |
1024 | lr->end--; | |
1025 | } | |
1026 | } | |
9d95b580 | 1027 | |
d3b63d7a | 1028 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
1029 | |
1030 | err = -EINVAL; | |
d3b63d7a | 1031 | if (lr->start > lr->end) { |
631c9def | 1032 | semantic_error("Start line must be smaller" |
146a1439 | 1033 | " than end line.\n"); |
21dd9ae5 | 1034 | goto err; |
146a1439 | 1035 | } |
21dd9ae5 FBH |
1036 | if (*range != '\0') { |
1037 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
1038 | goto err; | |
146a1439 | 1039 | } |
d3b63d7a | 1040 | } |
02b95dad | 1041 | |
e116dfa1 MH |
1042 | file = strchr(name, '@'); |
1043 | if (file) { | |
1044 | *file = '\0'; | |
1045 | lr->file = strdup(++file); | |
1046 | if (lr->file == NULL) { | |
1047 | err = -ENOMEM; | |
1048 | goto err; | |
1049 | } | |
1050 | lr->function = name; | |
1051 | } else if (strchr(name, '.')) | |
21dd9ae5 | 1052 | lr->file = name; |
631c9def | 1053 | else |
21dd9ae5 | 1054 | lr->function = name; |
146a1439 MH |
1055 | |
1056 | return 0; | |
21dd9ae5 FBH |
1057 | err: |
1058 | free(name); | |
1059 | return err; | |
631c9def MH |
1060 | } |
1061 | ||
b7702a21 MH |
1062 | /* Check the name is good for event/group */ |
1063 | static bool check_event_name(const char *name) | |
1064 | { | |
1065 | if (!isalpha(*name) && *name != '_') | |
1066 | return false; | |
1067 | while (*++name != '\0') { | |
1068 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
1069 | return false; | |
1070 | } | |
1071 | return true; | |
1072 | } | |
1073 | ||
50656eec | 1074 | /* Parse probepoint definition. */ |
146a1439 | 1075 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 1076 | { |
4235b045 | 1077 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
1078 | char *ptr, *tmp; |
1079 | char c, nc = 0; | |
3099c026 | 1080 | bool file_spec = false; |
50656eec MH |
1081 | /* |
1082 | * <Syntax> | |
2a9c8c36 MH |
1083 | * perf probe [EVENT=]SRC[:LN|;PTN] |
1084 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
1085 | * |
1086 | * TODO:Group name support | |
50656eec MH |
1087 | */ |
1088 | ||
2a9c8c36 MH |
1089 | ptr = strpbrk(arg, ";=@+%"); |
1090 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
1091 | *ptr = '\0'; |
1092 | tmp = ptr + 1; | |
146a1439 MH |
1093 | if (strchr(arg, ':')) { |
1094 | semantic_error("Group name is not supported yet.\n"); | |
1095 | return -ENOTSUP; | |
1096 | } | |
1097 | if (!check_event_name(arg)) { | |
b7702a21 | 1098 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
1099 | "follow C symbol-naming rule.\n", arg); |
1100 | return -EINVAL; | |
1101 | } | |
02b95dad MH |
1102 | pev->event = strdup(arg); |
1103 | if (pev->event == NULL) | |
1104 | return -ENOMEM; | |
4235b045 | 1105 | pev->group = NULL; |
af663d75 MH |
1106 | arg = tmp; |
1107 | } | |
1108 | ||
3099c026 NR |
1109 | /* |
1110 | * Check arg is function or file name and copy it. | |
1111 | * | |
1112 | * We consider arg to be a file spec if and only if it satisfies | |
1113 | * all of the below criteria:: | |
1114 | * - it does not include any of "+@%", | |
1115 | * - it includes one of ":;", and | |
1116 | * - it has a period '.' in the name. | |
1117 | * | |
1118 | * Otherwise, we consider arg to be a function specification. | |
1119 | */ | |
1120 | if (!strpbrk(arg, "+@%") && (ptr = strpbrk(arg, ";:")) != NULL) { | |
1121 | /* This is a file spec if it includes a '.' before ; or : */ | |
1122 | if (memchr(arg, '.', ptr - arg)) | |
1123 | file_spec = true; | |
1124 | } | |
1125 | ||
2a9c8c36 | 1126 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
1127 | if (ptr) { |
1128 | nc = *ptr; | |
1129 | *ptr++ = '\0'; | |
1130 | } | |
1131 | ||
02b95dad MH |
1132 | tmp = strdup(arg); |
1133 | if (tmp == NULL) | |
1134 | return -ENOMEM; | |
1135 | ||
3099c026 | 1136 | if (file_spec) |
02b95dad | 1137 | pp->file = tmp; |
3099c026 | 1138 | else |
02b95dad | 1139 | pp->function = tmp; |
50656eec MH |
1140 | |
1141 | /* Parse other options */ | |
1142 | while (ptr) { | |
1143 | arg = ptr; | |
1144 | c = nc; | |
2a9c8c36 | 1145 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
1146 | pp->lazy_line = strdup(arg); |
1147 | if (pp->lazy_line == NULL) | |
1148 | return -ENOMEM; | |
2a9c8c36 MH |
1149 | break; |
1150 | } | |
1151 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
1152 | if (ptr) { |
1153 | nc = *ptr; | |
1154 | *ptr++ = '\0'; | |
1155 | } | |
1156 | switch (c) { | |
1157 | case ':': /* Line number */ | |
1158 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 1159 | if (*tmp != '\0') { |
2a9c8c36 | 1160 | semantic_error("There is non-digit char" |
146a1439 MH |
1161 | " in line number.\n"); |
1162 | return -EINVAL; | |
1163 | } | |
50656eec MH |
1164 | break; |
1165 | case '+': /* Byte offset from a symbol */ | |
1166 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 1167 | if (*tmp != '\0') { |
2a9c8c36 | 1168 | semantic_error("There is non-digit character" |
146a1439 MH |
1169 | " in offset.\n"); |
1170 | return -EINVAL; | |
1171 | } | |
50656eec MH |
1172 | break; |
1173 | case '@': /* File name */ | |
146a1439 MH |
1174 | if (pp->file) { |
1175 | semantic_error("SRC@SRC is not allowed.\n"); | |
1176 | return -EINVAL; | |
1177 | } | |
02b95dad MH |
1178 | pp->file = strdup(arg); |
1179 | if (pp->file == NULL) | |
1180 | return -ENOMEM; | |
50656eec MH |
1181 | break; |
1182 | case '%': /* Probe places */ | |
1183 | if (strcmp(arg, "return") == 0) { | |
1184 | pp->retprobe = 1; | |
146a1439 MH |
1185 | } else { /* Others not supported yet */ |
1186 | semantic_error("%%%s is not supported.\n", arg); | |
1187 | return -ENOTSUP; | |
1188 | } | |
50656eec | 1189 | break; |
146a1439 MH |
1190 | default: /* Buggy case */ |
1191 | pr_err("This program has a bug at %s:%d.\n", | |
1192 | __FILE__, __LINE__); | |
1193 | return -ENOTSUP; | |
50656eec MH |
1194 | break; |
1195 | } | |
1196 | } | |
1197 | ||
1198 | /* Exclusion check */ | |
146a1439 | 1199 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
1200 | semantic_error("Lazy pattern can't be used with" |
1201 | " line number.\n"); | |
146a1439 MH |
1202 | return -EINVAL; |
1203 | } | |
2a9c8c36 | 1204 | |
146a1439 | 1205 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 1206 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
1207 | return -EINVAL; |
1208 | } | |
2a9c8c36 | 1209 | |
146a1439 | 1210 | if (pp->line && pp->offset) { |
0e43e5d2 | 1211 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
1212 | return -EINVAL; |
1213 | } | |
50656eec | 1214 | |
146a1439 | 1215 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 1216 | semantic_error("File always requires line number or " |
0e43e5d2 | 1217 | "lazy pattern.\n"); |
146a1439 MH |
1218 | return -EINVAL; |
1219 | } | |
50656eec | 1220 | |
146a1439 | 1221 | if (pp->offset && !pp->function) { |
0e43e5d2 | 1222 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
1223 | return -EINVAL; |
1224 | } | |
50656eec | 1225 | |
146a1439 | 1226 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 1227 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
1228 | return -EINVAL; |
1229 | } | |
50656eec | 1230 | |
146a1439 | 1231 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 1232 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 1233 | "return probe.\n"); |
146a1439 MH |
1234 | return -EINVAL; |
1235 | } | |
50656eec | 1236 | |
4235b045 | 1237 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
1238 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
1239 | pp->lazy_line); | |
146a1439 | 1240 | return 0; |
50656eec MH |
1241 | } |
1242 | ||
7df2f329 | 1243 | /* Parse perf-probe event argument */ |
146a1439 | 1244 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 1245 | { |
b2a3c12b | 1246 | char *tmp, *goodname; |
7df2f329 MH |
1247 | struct perf_probe_arg_field **fieldp; |
1248 | ||
1249 | pr_debug("parsing arg: %s into ", str); | |
1250 | ||
48481938 MH |
1251 | tmp = strchr(str, '='); |
1252 | if (tmp) { | |
02b95dad MH |
1253 | arg->name = strndup(str, tmp - str); |
1254 | if (arg->name == NULL) | |
1255 | return -ENOMEM; | |
11a1ca35 | 1256 | pr_debug("name:%s ", arg->name); |
48481938 MH |
1257 | str = tmp + 1; |
1258 | } | |
1259 | ||
11a1ca35 MH |
1260 | tmp = strchr(str, ':'); |
1261 | if (tmp) { /* Type setting */ | |
1262 | *tmp = '\0'; | |
02b95dad MH |
1263 | arg->type = strdup(tmp + 1); |
1264 | if (arg->type == NULL) | |
1265 | return -ENOMEM; | |
11a1ca35 MH |
1266 | pr_debug("type:%s ", arg->type); |
1267 | } | |
1268 | ||
b2a3c12b | 1269 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
1270 | if (!is_c_varname(str) || !tmp) { |
1271 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
1272 | arg->var = strdup(str); |
1273 | if (arg->var == NULL) | |
1274 | return -ENOMEM; | |
48481938 | 1275 | pr_debug("%s\n", arg->var); |
146a1439 | 1276 | return 0; |
7df2f329 MH |
1277 | } |
1278 | ||
b2a3c12b | 1279 | /* Structure fields or array element */ |
02b95dad MH |
1280 | arg->var = strndup(str, tmp - str); |
1281 | if (arg->var == NULL) | |
1282 | return -ENOMEM; | |
b2a3c12b | 1283 | goodname = arg->var; |
48481938 | 1284 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
1285 | fieldp = &arg->field; |
1286 | ||
1287 | do { | |
e334016f MH |
1288 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
1289 | if (*fieldp == NULL) | |
1290 | return -ENOMEM; | |
b2a3c12b MH |
1291 | if (*tmp == '[') { /* Array */ |
1292 | str = tmp; | |
1293 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 1294 | (*fieldp)->ref = true; |
b2a3c12b MH |
1295 | if (*tmp != ']' || tmp == str + 1) { |
1296 | semantic_error("Array index must be a" | |
1297 | " number.\n"); | |
1298 | return -EINVAL; | |
1299 | } | |
1300 | tmp++; | |
1301 | if (*tmp == '\0') | |
1302 | tmp = NULL; | |
1303 | } else { /* Structure */ | |
1304 | if (*tmp == '.') { | |
1305 | str = tmp + 1; | |
1306 | (*fieldp)->ref = false; | |
1307 | } else if (tmp[1] == '>') { | |
1308 | str = tmp + 2; | |
1309 | (*fieldp)->ref = true; | |
1310 | } else { | |
1311 | semantic_error("Argument parse error: %s\n", | |
1312 | str); | |
1313 | return -EINVAL; | |
1314 | } | |
1315 | tmp = strpbrk(str, "-.["); | |
146a1439 | 1316 | } |
7df2f329 | 1317 | if (tmp) { |
02b95dad MH |
1318 | (*fieldp)->name = strndup(str, tmp - str); |
1319 | if ((*fieldp)->name == NULL) | |
1320 | return -ENOMEM; | |
b2a3c12b MH |
1321 | if (*str != '[') |
1322 | goodname = (*fieldp)->name; | |
7df2f329 MH |
1323 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
1324 | fieldp = &(*fieldp)->next; | |
1325 | } | |
1326 | } while (tmp); | |
02b95dad MH |
1327 | (*fieldp)->name = strdup(str); |
1328 | if ((*fieldp)->name == NULL) | |
1329 | return -ENOMEM; | |
b2a3c12b MH |
1330 | if (*str != '[') |
1331 | goodname = (*fieldp)->name; | |
7df2f329 | 1332 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 1333 | |
b2a3c12b | 1334 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 1335 | if (!arg->name) { |
b2a3c12b | 1336 | arg->name = strdup(goodname); |
02b95dad MH |
1337 | if (arg->name == NULL) |
1338 | return -ENOMEM; | |
1339 | } | |
146a1439 | 1340 | return 0; |
7df2f329 MH |
1341 | } |
1342 | ||
4235b045 | 1343 | /* Parse perf-probe event command */ |
146a1439 | 1344 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1345 | { |
e1c01d61 | 1346 | char **argv; |
146a1439 | 1347 | int argc, i, ret = 0; |
fac13fd5 | 1348 | |
4235b045 | 1349 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1350 | if (!argv) { |
1351 | pr_debug("Failed to split arguments.\n"); | |
1352 | return -ENOMEM; | |
1353 | } | |
1354 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1355 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1356 | ret = -ERANGE; | |
1357 | goto out; | |
1358 | } | |
50656eec | 1359 | /* Parse probe point */ |
146a1439 MH |
1360 | ret = parse_perf_probe_point(argv[0], pev); |
1361 | if (ret < 0) | |
1362 | goto out; | |
50656eec | 1363 | |
e1c01d61 | 1364 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1365 | pev->nargs = argc - 1; |
e334016f MH |
1366 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1367 | if (pev->args == NULL) { | |
1368 | ret = -ENOMEM; | |
1369 | goto out; | |
1370 | } | |
146a1439 MH |
1371 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1372 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1373 | if (ret >= 0 && | |
1374 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1375 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1376 | " kretprobe.\n"); |
1377 | ret = -EINVAL; | |
1378 | } | |
e1c01d61 | 1379 | } |
146a1439 | 1380 | out: |
e1c01d61 | 1381 | argv_free(argv); |
146a1439 MH |
1382 | |
1383 | return ret; | |
50656eec MH |
1384 | } |
1385 | ||
4235b045 MH |
1386 | /* Return true if this perf_probe_event requires debuginfo */ |
1387 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1388 | { | |
1389 | int i; | |
1390 | ||
1391 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
1392 | return true; | |
1393 | ||
1394 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 1395 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
1396 | return true; |
1397 | ||
1398 | return false; | |
1399 | } | |
1400 | ||
0e60836b SD |
1401 | /* Parse probe_events event into struct probe_point */ |
1402 | static int parse_probe_trace_command(const char *cmd, | |
190b57fc | 1403 | struct probe_trace_event *tev) |
4de189fe | 1404 | { |
0e60836b | 1405 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1406 | char pr; |
1407 | char *p; | |
bcbd0040 | 1408 | char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str; |
4de189fe MH |
1409 | int ret, i, argc; |
1410 | char **argv; | |
1411 | ||
0e60836b | 1412 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1413 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1414 | if (!argv) { |
1415 | pr_debug("Failed to split arguments.\n"); | |
1416 | return -ENOMEM; | |
1417 | } | |
1418 | if (argc < 2) { | |
1419 | semantic_error("Too few probe arguments.\n"); | |
1420 | ret = -ERANGE; | |
1421 | goto out; | |
1422 | } | |
4de189fe MH |
1423 | |
1424 | /* Scan event and group name. */ | |
bcbd0040 IT |
1425 | argv0_str = strdup(argv[0]); |
1426 | if (argv0_str == NULL) { | |
1427 | ret = -ENOMEM; | |
1428 | goto out; | |
1429 | } | |
1430 | fmt1_str = strtok_r(argv0_str, ":", &fmt); | |
1431 | fmt2_str = strtok_r(NULL, "/", &fmt); | |
1432 | fmt3_str = strtok_r(NULL, " \t", &fmt); | |
1433 | if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL | |
1434 | || fmt3_str == NULL) { | |
146a1439 MH |
1435 | semantic_error("Failed to parse event name: %s\n", argv[0]); |
1436 | ret = -EINVAL; | |
1437 | goto out; | |
1438 | } | |
bcbd0040 IT |
1439 | pr = fmt1_str[0]; |
1440 | tev->group = strdup(fmt2_str); | |
1441 | tev->event = strdup(fmt3_str); | |
1442 | if (tev->group == NULL || tev->event == NULL) { | |
1443 | ret = -ENOMEM; | |
1444 | goto out; | |
1445 | } | |
4235b045 | 1446 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1447 | |
4235b045 | 1448 | tp->retprobe = (pr == 'r'); |
4de189fe | 1449 | |
190b57fc MH |
1450 | /* Scan module name(if there), function name and offset */ |
1451 | p = strchr(argv[1], ':'); | |
1452 | if (p) { | |
1453 | tp->module = strndup(argv[1], p - argv[1]); | |
1454 | p++; | |
1455 | } else | |
1456 | p = argv[1]; | |
bcbd0040 | 1457 | fmt1_str = strtok_r(p, "+", &fmt); |
5a6f6314 MH |
1458 | if (fmt1_str[0] == '0') /* only the address started with 0x */ |
1459 | tp->address = strtoul(fmt1_str, NULL, 0); | |
1460 | else { | |
1461 | /* Only the symbol-based probe has offset */ | |
1462 | tp->symbol = strdup(fmt1_str); | |
1463 | if (tp->symbol == NULL) { | |
1464 | ret = -ENOMEM; | |
1465 | goto out; | |
1466 | } | |
1467 | fmt2_str = strtok_r(NULL, "", &fmt); | |
1468 | if (fmt2_str == NULL) | |
1469 | tp->offset = 0; | |
1470 | else | |
1471 | tp->offset = strtoul(fmt2_str, NULL, 10); | |
bcbd0040 | 1472 | } |
4de189fe | 1473 | |
4235b045 | 1474 | tev->nargs = argc - 2; |
0e60836b | 1475 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1476 | if (tev->args == NULL) { |
1477 | ret = -ENOMEM; | |
1478 | goto out; | |
1479 | } | |
4235b045 | 1480 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1481 | p = strchr(argv[i + 2], '='); |
1482 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1483 | *p++ = '\0'; |
1484 | else | |
1485 | p = argv[i + 2]; | |
02b95dad | 1486 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1487 | /* TODO: parse regs and offset */ |
02b95dad MH |
1488 | tev->args[i].value = strdup(p); |
1489 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1490 | ret = -ENOMEM; | |
1491 | goto out; | |
1492 | } | |
4de189fe | 1493 | } |
146a1439 MH |
1494 | ret = 0; |
1495 | out: | |
bcbd0040 | 1496 | free(argv0_str); |
4de189fe | 1497 | argv_free(argv); |
146a1439 | 1498 | return ret; |
4de189fe MH |
1499 | } |
1500 | ||
7df2f329 MH |
1501 | /* Compose only probe arg */ |
1502 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
1503 | { | |
1504 | struct perf_probe_arg_field *field = pa->field; | |
1505 | int ret; | |
1506 | char *tmp = buf; | |
1507 | ||
48481938 MH |
1508 | if (pa->name && pa->var) |
1509 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
1510 | else | |
1511 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
1512 | if (ret <= 0) |
1513 | goto error; | |
1514 | tmp += ret; | |
1515 | len -= ret; | |
1516 | ||
1517 | while (field) { | |
b2a3c12b MH |
1518 | if (field->name[0] == '[') |
1519 | ret = e_snprintf(tmp, len, "%s", field->name); | |
1520 | else | |
1521 | ret = e_snprintf(tmp, len, "%s%s", | |
1522 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
1523 | if (ret <= 0) |
1524 | goto error; | |
1525 | tmp += ret; | |
1526 | len -= ret; | |
1527 | field = field->next; | |
1528 | } | |
11a1ca35 MH |
1529 | |
1530 | if (pa->type) { | |
1531 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
1532 | if (ret <= 0) | |
1533 | goto error; | |
1534 | tmp += ret; | |
1535 | len -= ret; | |
1536 | } | |
1537 | ||
7df2f329 MH |
1538 | return tmp - buf; |
1539 | error: | |
5f03cba4 | 1540 | pr_debug("Failed to synthesize perf probe argument: %d\n", ret); |
146a1439 | 1541 | return ret; |
7df2f329 MH |
1542 | } |
1543 | ||
4235b045 MH |
1544 | /* Compose only probe point (not argument) */ |
1545 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1546 | { |
fb1587d8 MH |
1547 | char *buf, *tmp; |
1548 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1549 | int ret, len; | |
4de189fe | 1550 | |
e334016f MH |
1551 | buf = zalloc(MAX_CMDLEN); |
1552 | if (buf == NULL) { | |
1553 | ret = -ENOMEM; | |
1554 | goto error; | |
1555 | } | |
4de189fe | 1556 | if (pp->offset) { |
fb1587d8 | 1557 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1558 | if (ret <= 0) |
1559 | goto error; | |
1560 | } | |
1561 | if (pp->line) { | |
fb1587d8 MH |
1562 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1563 | if (ret <= 0) | |
1564 | goto error; | |
1565 | } | |
1566 | if (pp->file) { | |
32ae2ade FBH |
1567 | tmp = pp->file; |
1568 | len = strlen(tmp); | |
1569 | if (len > 30) { | |
1570 | tmp = strchr(pp->file + len - 30, '/'); | |
1571 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1572 | } | |
1573 | ret = e_snprintf(file, 32, "@%s", tmp); | |
4de189fe MH |
1574 | if (ret <= 0) |
1575 | goto error; | |
1576 | } | |
1577 | ||
1578 | if (pp->function) | |
fb1587d8 MH |
1579 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1580 | offs, pp->retprobe ? "%return" : "", line, | |
1581 | file); | |
4de189fe | 1582 | else |
fb1587d8 | 1583 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1584 | if (ret <= 0) |
1585 | goto error; | |
1586 | ||
1587 | return buf; | |
7ef17aaf | 1588 | error: |
5f03cba4 | 1589 | pr_debug("Failed to synthesize perf probe point: %d\n", ret); |
f5385650 | 1590 | free(buf); |
146a1439 | 1591 | return NULL; |
7ef17aaf MH |
1592 | } |
1593 | ||
4235b045 MH |
1594 | #if 0 |
1595 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1596 | { |
1597 | char *buf; | |
1598 | int i, len, ret; | |
1599 | ||
4235b045 MH |
1600 | buf = synthesize_perf_probe_point(&pev->point); |
1601 | if (!buf) | |
1602 | return NULL; | |
4de189fe | 1603 | |
4235b045 MH |
1604 | len = strlen(buf); |
1605 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1606 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1607 | pev->args[i].name); |
1608 | if (ret <= 0) { | |
1609 | free(buf); | |
1610 | return NULL; | |
1611 | } | |
4de189fe MH |
1612 | len += ret; |
1613 | } | |
4de189fe | 1614 | |
4235b045 MH |
1615 | return buf; |
1616 | } | |
1617 | #endif | |
1618 | ||
0e60836b | 1619 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1620 | char **buf, size_t *buflen, |
1621 | int depth) | |
1622 | { | |
1623 | int ret; | |
1624 | if (ref->next) { | |
0e60836b | 1625 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1626 | buflen, depth + 1); |
1627 | if (depth < 0) | |
1628 | goto out; | |
1629 | } | |
1630 | ||
1631 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1632 | if (ret < 0) | |
1633 | depth = ret; | |
1634 | else { | |
1635 | *buf += ret; | |
1636 | *buflen -= ret; | |
1637 | } | |
1638 | out: | |
1639 | return depth; | |
4de189fe | 1640 | |
4de189fe MH |
1641 | } |
1642 | ||
0e60836b | 1643 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1644 | char *buf, size_t buflen) |
50656eec | 1645 | { |
0e60836b | 1646 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1647 | int ret, depth = 0; |
1648 | char *tmp = buf; | |
1649 | ||
1650 | /* Argument name or separator */ | |
1651 | if (arg->name) | |
1652 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1653 | else | |
1654 | ret = e_snprintf(buf, buflen, " "); | |
1655 | if (ret < 0) | |
1656 | return ret; | |
1657 | buf += ret; | |
1658 | buflen -= ret; | |
1659 | ||
b7dcb857 MH |
1660 | /* Special case: @XXX */ |
1661 | if (arg->value[0] == '@' && arg->ref) | |
1662 | ref = ref->next; | |
1663 | ||
4235b045 | 1664 | /* Dereferencing arguments */ |
b7dcb857 | 1665 | if (ref) { |
0e60836b | 1666 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1667 | &buflen, 1); |
1668 | if (depth < 0) | |
1669 | return depth; | |
1670 | } | |
1671 | ||
1672 | /* Print argument value */ | |
b7dcb857 MH |
1673 | if (arg->value[0] == '@' && arg->ref) |
1674 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1675 | arg->ref->offset); | |
1676 | else | |
1677 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1678 | if (ret < 0) |
1679 | return ret; | |
1680 | buf += ret; | |
1681 | buflen -= ret; | |
1682 | ||
1683 | /* Closing */ | |
1684 | while (depth--) { | |
1685 | ret = e_snprintf(buf, buflen, ")"); | |
1686 | if (ret < 0) | |
1687 | return ret; | |
1688 | buf += ret; | |
1689 | buflen -= ret; | |
1690 | } | |
4984912e MH |
1691 | /* Print argument type */ |
1692 | if (arg->type) { | |
1693 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1694 | if (ret <= 0) | |
1695 | return ret; | |
1696 | buf += ret; | |
1697 | } | |
4235b045 MH |
1698 | |
1699 | return buf - tmp; | |
1700 | } | |
1701 | ||
0e60836b | 1702 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1703 | { |
0e60836b | 1704 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1705 | char *buf; |
1706 | int i, len, ret; | |
1707 | ||
e334016f MH |
1708 | buf = zalloc(MAX_CMDLEN); |
1709 | if (buf == NULL) | |
1710 | return NULL; | |
1711 | ||
eb948e50 MH |
1712 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s ", tp->retprobe ? 'r' : 'p', |
1713 | tev->group, tev->event); | |
1714 | if (len <= 0) | |
1715 | goto error; | |
1716 | ||
1717 | /* Uprobes must have tp->address and tp->module */ | |
1718 | if (tev->uprobes && (!tp->address || !tp->module)) | |
1719 | goto error; | |
1720 | ||
1721 | /* Use the tp->address for uprobes */ | |
225466f1 | 1722 | if (tev->uprobes) |
eb948e50 MH |
1723 | ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s:0x%lx", |
1724 | tp->module, tp->address); | |
225466f1 | 1725 | else |
eb948e50 | 1726 | ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s%s%s+%lu", |
225466f1 SD |
1727 | tp->module ?: "", tp->module ? ":" : "", |
1728 | tp->symbol, tp->offset); | |
1729 | ||
eb948e50 | 1730 | if (ret <= 0) |
50656eec | 1731 | goto error; |
eb948e50 | 1732 | len += ret; |
50656eec | 1733 | |
4235b045 | 1734 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1735 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1736 | MAX_CMDLEN - len); |
4de189fe | 1737 | if (ret <= 0) |
50656eec MH |
1738 | goto error; |
1739 | len += ret; | |
1740 | } | |
50656eec | 1741 | |
4235b045 | 1742 | return buf; |
50656eec | 1743 | error: |
4235b045 MH |
1744 | free(buf); |
1745 | return NULL; | |
1746 | } | |
50656eec | 1747 | |
5a6f6314 MH |
1748 | static int find_perf_probe_point_from_map(struct probe_trace_point *tp, |
1749 | struct perf_probe_point *pp, | |
1750 | bool is_kprobe) | |
1751 | { | |
1752 | struct symbol *sym = NULL; | |
1753 | struct map *map; | |
1754 | u64 addr; | |
1755 | int ret = -ENOENT; | |
1756 | ||
1757 | if (!is_kprobe) { | |
1758 | map = dso__new_map(tp->module); | |
1759 | if (!map) | |
1760 | goto out; | |
1761 | addr = tp->address; | |
1762 | sym = map__find_symbol(map, addr, NULL); | |
1763 | } else { | |
1764 | addr = kernel_get_symbol_address_by_name(tp->symbol, true); | |
1765 | if (addr) { | |
1766 | addr += tp->offset; | |
1767 | sym = __find_kernel_function(addr, &map); | |
1768 | } | |
1769 | } | |
1770 | if (!sym) | |
1771 | goto out; | |
1772 | ||
1773 | pp->retprobe = tp->retprobe; | |
1774 | pp->offset = addr - map->unmap_ip(map, sym->start); | |
1775 | pp->function = strdup(sym->name); | |
1776 | ret = pp->function ? 0 : -ENOMEM; | |
1777 | ||
1778 | out: | |
1779 | if (map && !is_kprobe) { | |
1780 | dso__delete(map->dso); | |
1781 | map__delete(map); | |
1782 | } | |
1783 | ||
1784 | return ret; | |
1785 | } | |
1786 | ||
1787 | static int convert_to_perf_probe_point(struct probe_trace_point *tp, | |
1788 | struct perf_probe_point *pp, | |
1789 | bool is_kprobe) | |
1790 | { | |
1791 | char buf[128]; | |
1792 | int ret; | |
1793 | ||
1794 | ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe); | |
1795 | if (!ret) | |
1796 | return 0; | |
1797 | ret = find_perf_probe_point_from_map(tp, pp, is_kprobe); | |
1798 | if (!ret) | |
1799 | return 0; | |
1800 | ||
1801 | pr_debug("Failed to find probe point from both of dwarf and map.\n"); | |
1802 | ||
1803 | if (tp->symbol) { | |
1804 | pp->function = strdup(tp->symbol); | |
1805 | pp->offset = tp->offset; | |
1806 | } else if (!tp->module && !is_kprobe) { | |
1807 | ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address); | |
1808 | if (ret < 0) | |
1809 | return ret; | |
1810 | pp->function = strdup(buf); | |
1811 | pp->offset = 0; | |
1812 | } | |
1813 | if (pp->function == NULL) | |
1814 | return -ENOMEM; | |
1815 | ||
1816 | pp->retprobe = tp->retprobe; | |
1817 | ||
1818 | return 0; | |
1819 | } | |
1820 | ||
0e60836b | 1821 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
225466f1 | 1822 | struct perf_probe_event *pev, bool is_kprobe) |
4235b045 | 1823 | { |
02b95dad | 1824 | char buf[64] = ""; |
146a1439 | 1825 | int i, ret; |
4235b045 | 1826 | |
4b4da7f7 | 1827 | /* Convert event/group name */ |
02b95dad MH |
1828 | pev->event = strdup(tev->event); |
1829 | pev->group = strdup(tev->group); | |
1830 | if (pev->event == NULL || pev->group == NULL) | |
1831 | return -ENOMEM; | |
fb1587d8 | 1832 | |
4b4da7f7 | 1833 | /* Convert trace_point to probe_point */ |
5a6f6314 | 1834 | ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe); |
146a1439 MH |
1835 | if (ret < 0) |
1836 | return ret; | |
4b4da7f7 | 1837 | |
4235b045 MH |
1838 | /* Convert trace_arg to probe_arg */ |
1839 | pev->nargs = tev->nargs; | |
e334016f MH |
1840 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1841 | if (pev->args == NULL) | |
1842 | return -ENOMEM; | |
02b95dad | 1843 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1844 | if (tev->args[i].name) |
02b95dad | 1845 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1846 | else { |
0e60836b | 1847 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1848 | buf, 64); |
02b95dad | 1849 | pev->args[i].name = strdup(buf); |
4235b045 | 1850 | } |
02b95dad MH |
1851 | if (pev->args[i].name == NULL && ret >= 0) |
1852 | ret = -ENOMEM; | |
1853 | } | |
146a1439 MH |
1854 | |
1855 | if (ret < 0) | |
1856 | clear_perf_probe_event(pev); | |
1857 | ||
1858 | return ret; | |
4235b045 MH |
1859 | } |
1860 | ||
1861 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1862 | { | |
7df2f329 | 1863 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1864 | int i; |
1865 | ||
f5385650 ACM |
1866 | free(pev->event); |
1867 | free(pev->group); | |
7afb3fab | 1868 | free(pev->target); |
9b118aca | 1869 | clear_perf_probe_point(&pev->point); |
f5385650 | 1870 | |
7df2f329 | 1871 | for (i = 0; i < pev->nargs; i++) { |
f5385650 ACM |
1872 | free(pev->args[i].name); |
1873 | free(pev->args[i].var); | |
1874 | free(pev->args[i].type); | |
7df2f329 MH |
1875 | field = pev->args[i].field; |
1876 | while (field) { | |
1877 | next = field->next; | |
74cf249d | 1878 | zfree(&field->name); |
7df2f329 MH |
1879 | free(field); |
1880 | field = next; | |
1881 | } | |
1882 | } | |
f5385650 | 1883 | free(pev->args); |
4235b045 MH |
1884 | memset(pev, 0, sizeof(*pev)); |
1885 | } | |
1886 | ||
0e60836b | 1887 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1888 | { |
0e60836b | 1889 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1890 | int i; |
1891 | ||
f5385650 ACM |
1892 | free(tev->event); |
1893 | free(tev->group); | |
1894 | free(tev->point.symbol); | |
1895 | free(tev->point.module); | |
4235b045 | 1896 | for (i = 0; i < tev->nargs; i++) { |
f5385650 ACM |
1897 | free(tev->args[i].name); |
1898 | free(tev->args[i].value); | |
1899 | free(tev->args[i].type); | |
4235b045 MH |
1900 | ref = tev->args[i].ref; |
1901 | while (ref) { | |
1902 | next = ref->next; | |
1903 | free(ref); | |
1904 | ref = next; | |
1905 | } | |
1906 | } | |
f5385650 | 1907 | free(tev->args); |
4235b045 | 1908 | memset(tev, 0, sizeof(*tev)); |
50656eec MH |
1909 | } |
1910 | ||
5e45187c | 1911 | static void print_open_warning(int err, bool is_kprobe) |
225466f1 | 1912 | { |
5f03cba4 | 1913 | char sbuf[STRERR_BUFSIZE]; |
225466f1 | 1914 | |
5e45187c | 1915 | if (err == -ENOENT) { |
225466f1 SD |
1916 | const char *config; |
1917 | ||
1918 | if (!is_kprobe) | |
1919 | config = "CONFIG_UPROBE_EVENTS"; | |
1920 | else | |
1921 | config = "CONFIG_KPROBE_EVENTS"; | |
1922 | ||
5e45187c MH |
1923 | pr_warning("%cprobe_events file does not exist" |
1924 | " - please rebuild kernel with %s.\n", | |
1925 | is_kprobe ? 'k' : 'u', config); | |
1926 | } else if (err == -ENOTSUP) | |
23773ca1 | 1927 | pr_warning("Tracefs or debugfs is not mounted.\n"); |
5e45187c MH |
1928 | else |
1929 | pr_warning("Failed to open %cprobe_events: %s\n", | |
1930 | is_kprobe ? 'k' : 'u', | |
1931 | strerror_r(-err, sbuf, sizeof(sbuf))); | |
225466f1 SD |
1932 | } |
1933 | ||
467ec085 MH |
1934 | static void print_both_open_warning(int kerr, int uerr) |
1935 | { | |
1936 | /* Both kprobes and uprobes are disabled, warn it. */ | |
1937 | if (kerr == -ENOTSUP && uerr == -ENOTSUP) | |
23773ca1 | 1938 | pr_warning("Tracefs or debugfs is not mounted.\n"); |
467ec085 MH |
1939 | else if (kerr == -ENOENT && uerr == -ENOENT) |
1940 | pr_warning("Please rebuild kernel with CONFIG_KPROBE_EVENTS " | |
1941 | "or/and CONFIG_UPROBE_EVENTS.\n"); | |
1942 | else { | |
5f03cba4 | 1943 | char sbuf[STRERR_BUFSIZE]; |
467ec085 MH |
1944 | pr_warning("Failed to open kprobe events: %s.\n", |
1945 | strerror_r(-kerr, sbuf, sizeof(sbuf))); | |
1946 | pr_warning("Failed to open uprobe events: %s.\n", | |
1947 | strerror_r(-uerr, sbuf, sizeof(sbuf))); | |
1948 | } | |
1949 | } | |
1950 | ||
5e45187c | 1951 | static int open_probe_events(const char *trace_file, bool readwrite) |
4de189fe MH |
1952 | { |
1953 | char buf[PATH_MAX]; | |
7ca5989d | 1954 | const char *__debugfs; |
23773ca1 | 1955 | const char *tracing_dir = ""; |
4de189fe MH |
1956 | int ret; |
1957 | ||
23773ca1 SRRH |
1958 | __debugfs = tracefs_find_mountpoint(); |
1959 | if (__debugfs == NULL) { | |
1960 | tracing_dir = "tracing/"; | |
7ca5989d | 1961 | |
23773ca1 SRRH |
1962 | __debugfs = debugfs_find_mountpoint(); |
1963 | if (__debugfs == NULL) | |
1964 | return -ENOTSUP; | |
1965 | } | |
1966 | ||
1967 | ret = e_snprintf(buf, PATH_MAX, "%s/%s%s", | |
1968 | __debugfs, tracing_dir, trace_file); | |
146a1439 | 1969 | if (ret >= 0) { |
7ca5989d | 1970 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1971 | if (readwrite && !probe_event_dry_run) |
1972 | ret = open(buf, O_RDWR, O_APPEND); | |
1973 | else | |
1974 | ret = open(buf, O_RDONLY, 0); | |
f4d7da49 | 1975 | |
225466f1 | 1976 | if (ret < 0) |
5e45187c | 1977 | ret = -errno; |
4de189fe MH |
1978 | } |
1979 | return ret; | |
1980 | } | |
1981 | ||
225466f1 SD |
1982 | static int open_kprobe_events(bool readwrite) |
1983 | { | |
23773ca1 | 1984 | return open_probe_events("kprobe_events", readwrite); |
225466f1 SD |
1985 | } |
1986 | ||
1987 | static int open_uprobe_events(bool readwrite) | |
1988 | { | |
23773ca1 | 1989 | return open_probe_events("uprobe_events", readwrite); |
225466f1 SD |
1990 | } |
1991 | ||
1992 | /* Get raw string list of current kprobe_events or uprobe_events */ | |
0e60836b | 1993 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1994 | { |
1995 | int ret, idx; | |
1996 | FILE *fp; | |
1997 | char buf[MAX_CMDLEN]; | |
1998 | char *p; | |
1999 | struct strlist *sl; | |
2000 | ||
2001 | sl = strlist__new(true, NULL); | |
2002 | ||
2003 | fp = fdopen(dup(fd), "r"); | |
2004 | while (!feof(fp)) { | |
2005 | p = fgets(buf, MAX_CMDLEN, fp); | |
2006 | if (!p) | |
2007 | break; | |
2008 | ||
2009 | idx = strlen(p) - 1; | |
2010 | if (p[idx] == '\n') | |
2011 | p[idx] = '\0'; | |
2012 | ret = strlist__add(sl, buf); | |
146a1439 | 2013 | if (ret < 0) { |
6eb08660 | 2014 | pr_debug("strlist__add failed (%d)\n", ret); |
146a1439 MH |
2015 | strlist__delete(sl); |
2016 | return NULL; | |
2017 | } | |
4de189fe MH |
2018 | } |
2019 | fclose(fp); | |
2020 | ||
2021 | return sl; | |
2022 | } | |
2023 | ||
9aaf5a5f MH |
2024 | struct kprobe_blacklist_node { |
2025 | struct list_head list; | |
2026 | unsigned long start; | |
2027 | unsigned long end; | |
2028 | char *symbol; | |
2029 | }; | |
2030 | ||
2031 | static void kprobe_blacklist__delete(struct list_head *blacklist) | |
2032 | { | |
2033 | struct kprobe_blacklist_node *node; | |
2034 | ||
2035 | while (!list_empty(blacklist)) { | |
2036 | node = list_first_entry(blacklist, | |
2037 | struct kprobe_blacklist_node, list); | |
2038 | list_del(&node->list); | |
2039 | free(node->symbol); | |
2040 | free(node); | |
2041 | } | |
2042 | } | |
2043 | ||
2044 | static int kprobe_blacklist__load(struct list_head *blacklist) | |
2045 | { | |
2046 | struct kprobe_blacklist_node *node; | |
2047 | const char *__debugfs = debugfs_find_mountpoint(); | |
2048 | char buf[PATH_MAX], *p; | |
2049 | FILE *fp; | |
2050 | int ret; | |
2051 | ||
2052 | if (__debugfs == NULL) | |
2053 | return -ENOTSUP; | |
2054 | ||
2055 | ret = e_snprintf(buf, PATH_MAX, "%s/kprobes/blacklist", __debugfs); | |
2056 | if (ret < 0) | |
2057 | return ret; | |
2058 | ||
2059 | fp = fopen(buf, "r"); | |
2060 | if (!fp) | |
2061 | return -errno; | |
2062 | ||
2063 | ret = 0; | |
2064 | while (fgets(buf, PATH_MAX, fp)) { | |
2065 | node = zalloc(sizeof(*node)); | |
2066 | if (!node) { | |
2067 | ret = -ENOMEM; | |
2068 | break; | |
2069 | } | |
2070 | INIT_LIST_HEAD(&node->list); | |
2071 | list_add_tail(&node->list, blacklist); | |
2072 | if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) { | |
2073 | ret = -EINVAL; | |
2074 | break; | |
2075 | } | |
2076 | p = strchr(buf, '\t'); | |
2077 | if (p) { | |
2078 | p++; | |
2079 | if (p[strlen(p) - 1] == '\n') | |
2080 | p[strlen(p) - 1] = '\0'; | |
2081 | } else | |
2082 | p = (char *)"unknown"; | |
2083 | node->symbol = strdup(p); | |
2084 | if (!node->symbol) { | |
2085 | ret = -ENOMEM; | |
2086 | break; | |
2087 | } | |
2088 | pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n", | |
2089 | node->start, node->end, node->symbol); | |
2090 | ret++; | |
2091 | } | |
2092 | if (ret < 0) | |
2093 | kprobe_blacklist__delete(blacklist); | |
2094 | fclose(fp); | |
2095 | ||
2096 | return ret; | |
2097 | } | |
2098 | ||
2099 | static struct kprobe_blacklist_node * | |
2100 | kprobe_blacklist__find_by_address(struct list_head *blacklist, | |
2101 | unsigned long address) | |
2102 | { | |
2103 | struct kprobe_blacklist_node *node; | |
2104 | ||
2105 | list_for_each_entry(node, blacklist, list) { | |
2106 | if (node->start <= address && address <= node->end) | |
2107 | return node; | |
2108 | } | |
2109 | ||
2110 | return NULL; | |
2111 | } | |
2112 | ||
278498d4 | 2113 | /* Show an event */ |
fb226ccd MH |
2114 | static int show_perf_probe_event(struct perf_probe_event *pev, |
2115 | const char *module) | |
278498d4 | 2116 | { |
7e990a51 | 2117 | int i, ret; |
278498d4 | 2118 | char buf[128]; |
4235b045 | 2119 | char *place; |
278498d4 | 2120 | |
4235b045 MH |
2121 | /* Synthesize only event probe point */ |
2122 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
2123 | if (!place) |
2124 | return -EINVAL; | |
4235b045 MH |
2125 | |
2126 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 2127 | if (ret < 0) |
146a1439 MH |
2128 | return ret; |
2129 | ||
5e17b28f | 2130 | pr_info(" %-20s (on %s", buf, place); |
fb226ccd | 2131 | if (module) |
5e17b28f | 2132 | pr_info(" in %s", module); |
278498d4 | 2133 | |
4235b045 | 2134 | if (pev->nargs > 0) { |
5e17b28f | 2135 | pr_info(" with"); |
7df2f329 | 2136 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
2137 | ret = synthesize_perf_probe_arg(&pev->args[i], |
2138 | buf, 128); | |
2139 | if (ret < 0) | |
2140 | break; | |
5e17b28f | 2141 | pr_info(" %s", buf); |
7df2f329 | 2142 | } |
278498d4 | 2143 | } |
5e17b28f | 2144 | pr_info(")\n"); |
4235b045 | 2145 | free(place); |
146a1439 | 2146 | return ret; |
278498d4 MH |
2147 | } |
2148 | ||
b6a89643 MH |
2149 | static bool filter_probe_trace_event(struct probe_trace_event *tev, |
2150 | struct strfilter *filter) | |
2151 | { | |
2152 | char tmp[128]; | |
2153 | ||
2154 | /* At first, check the event name itself */ | |
2155 | if (strfilter__compare(filter, tev->event)) | |
2156 | return true; | |
2157 | ||
2158 | /* Next, check the combination of name and group */ | |
2159 | if (e_snprintf(tmp, 128, "%s:%s", tev->group, tev->event) < 0) | |
2160 | return false; | |
2161 | return strfilter__compare(filter, tmp); | |
2162 | } | |
2163 | ||
2164 | static int __show_perf_probe_events(int fd, bool is_kprobe, | |
2165 | struct strfilter *filter) | |
4de189fe | 2166 | { |
225466f1 | 2167 | int ret = 0; |
0e60836b | 2168 | struct probe_trace_event tev; |
4235b045 | 2169 | struct perf_probe_event pev; |
4de189fe MH |
2170 | struct strlist *rawlist; |
2171 | struct str_node *ent; | |
2172 | ||
4235b045 MH |
2173 | memset(&tev, 0, sizeof(tev)); |
2174 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 2175 | |
0e60836b | 2176 | rawlist = get_probe_trace_command_rawlist(fd); |
146a1439 | 2177 | if (!rawlist) |
6eb08660 | 2178 | return -ENOMEM; |
4de189fe | 2179 | |
adf365f4 | 2180 | strlist__for_each(ent, rawlist) { |
0e60836b | 2181 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 | 2182 | if (ret >= 0) { |
b6a89643 MH |
2183 | if (!filter_probe_trace_event(&tev, filter)) |
2184 | goto next; | |
225466f1 SD |
2185 | ret = convert_to_perf_probe_event(&tev, &pev, |
2186 | is_kprobe); | |
146a1439 | 2187 | if (ret >= 0) |
fb226ccd MH |
2188 | ret = show_perf_probe_event(&pev, |
2189 | tev.point.module); | |
146a1439 | 2190 | } |
b6a89643 | 2191 | next: |
4235b045 | 2192 | clear_perf_probe_event(&pev); |
0e60836b | 2193 | clear_probe_trace_event(&tev); |
146a1439 MH |
2194 | if (ret < 0) |
2195 | break; | |
4de189fe | 2196 | } |
4de189fe | 2197 | strlist__delete(rawlist); |
146a1439 MH |
2198 | |
2199 | return ret; | |
4de189fe MH |
2200 | } |
2201 | ||
225466f1 | 2202 | /* List up current perf-probe events */ |
b6a89643 | 2203 | int show_perf_probe_events(struct strfilter *filter) |
225466f1 | 2204 | { |
5e45187c | 2205 | int kp_fd, up_fd, ret; |
225466f1 SD |
2206 | |
2207 | setup_pager(); | |
225466f1 | 2208 | |
ee45b6c2 | 2209 | ret = init_symbol_maps(false); |
225466f1 SD |
2210 | if (ret < 0) |
2211 | return ret; | |
2212 | ||
5e45187c MH |
2213 | kp_fd = open_kprobe_events(false); |
2214 | if (kp_fd >= 0) { | |
b6a89643 | 2215 | ret = __show_perf_probe_events(kp_fd, true, filter); |
5e45187c MH |
2216 | close(kp_fd); |
2217 | if (ret < 0) | |
2218 | goto out; | |
2219 | } | |
225466f1 | 2220 | |
5e45187c MH |
2221 | up_fd = open_uprobe_events(false); |
2222 | if (kp_fd < 0 && up_fd < 0) { | |
467ec085 | 2223 | print_both_open_warning(kp_fd, up_fd); |
5e45187c MH |
2224 | ret = kp_fd; |
2225 | goto out; | |
225466f1 SD |
2226 | } |
2227 | ||
5e45187c | 2228 | if (up_fd >= 0) { |
b6a89643 | 2229 | ret = __show_perf_probe_events(up_fd, false, filter); |
5e45187c MH |
2230 | close(up_fd); |
2231 | } | |
2232 | out: | |
ee45b6c2 | 2233 | exit_symbol_maps(); |
225466f1 SD |
2234 | return ret; |
2235 | } | |
2236 | ||
b498ce1f | 2237 | /* Get current perf-probe event names */ |
0e60836b | 2238 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 2239 | { |
fa28244d | 2240 | char buf[128]; |
b498ce1f MH |
2241 | struct strlist *sl, *rawlist; |
2242 | struct str_node *ent; | |
0e60836b | 2243 | struct probe_trace_event tev; |
146a1439 | 2244 | int ret = 0; |
b498ce1f | 2245 | |
4235b045 | 2246 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 2247 | rawlist = get_probe_trace_command_rawlist(fd); |
6eb08660 MH |
2248 | if (!rawlist) |
2249 | return NULL; | |
e1d2017b | 2250 | sl = strlist__new(true, NULL); |
adf365f4 | 2251 | strlist__for_each(ent, rawlist) { |
0e60836b | 2252 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
2253 | if (ret < 0) |
2254 | break; | |
fa28244d | 2255 | if (include_group) { |
146a1439 MH |
2256 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
2257 | tev.event); | |
2258 | if (ret >= 0) | |
2259 | ret = strlist__add(sl, buf); | |
fa28244d | 2260 | } else |
146a1439 | 2261 | ret = strlist__add(sl, tev.event); |
0e60836b | 2262 | clear_probe_trace_event(&tev); |
146a1439 MH |
2263 | if (ret < 0) |
2264 | break; | |
b498ce1f | 2265 | } |
b498ce1f MH |
2266 | strlist__delete(rawlist); |
2267 | ||
146a1439 MH |
2268 | if (ret < 0) { |
2269 | strlist__delete(sl); | |
2270 | return NULL; | |
2271 | } | |
b498ce1f MH |
2272 | return sl; |
2273 | } | |
2274 | ||
0e60836b | 2275 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 2276 | { |
6eca8cc3 | 2277 | int ret = 0; |
0e60836b | 2278 | char *buf = synthesize_probe_trace_command(tev); |
5f03cba4 | 2279 | char sbuf[STRERR_BUFSIZE]; |
50656eec | 2280 | |
146a1439 | 2281 | if (!buf) { |
0e60836b | 2282 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
2283 | return -EINVAL; |
2284 | } | |
2285 | ||
fa28244d | 2286 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
2287 | if (!probe_event_dry_run) { |
2288 | ret = write(fd, buf, strlen(buf)); | |
7949ba1f NK |
2289 | if (ret <= 0) { |
2290 | ret = -errno; | |
146a1439 | 2291 | pr_warning("Failed to write event: %s\n", |
5f03cba4 | 2292 | strerror_r(errno, sbuf, sizeof(sbuf))); |
7949ba1f | 2293 | } |
f4d7da49 | 2294 | } |
4235b045 | 2295 | free(buf); |
146a1439 | 2296 | return ret; |
50656eec MH |
2297 | } |
2298 | ||
146a1439 MH |
2299 | static int get_new_event_name(char *buf, size_t len, const char *base, |
2300 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
2301 | { |
2302 | int i, ret; | |
17f88fcd | 2303 | |
3099c026 NR |
2304 | if (*base == '.') |
2305 | base++; | |
2306 | ||
17f88fcd MH |
2307 | /* Try no suffix */ |
2308 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 | 2309 | if (ret < 0) { |
5f03cba4 | 2310 | pr_debug("snprintf() failed: %d\n", ret); |
146a1439 MH |
2311 | return ret; |
2312 | } | |
17f88fcd | 2313 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 2314 | return 0; |
17f88fcd | 2315 | |
d761b08b MH |
2316 | if (!allow_suffix) { |
2317 | pr_warning("Error: event \"%s\" already exists. " | |
2318 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 2319 | return -EEXIST; |
d761b08b MH |
2320 | } |
2321 | ||
17f88fcd MH |
2322 | /* Try to add suffix */ |
2323 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 2324 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 | 2325 | if (ret < 0) { |
5f03cba4 | 2326 | pr_debug("snprintf() failed: %d\n", ret); |
146a1439 MH |
2327 | return ret; |
2328 | } | |
b498ce1f MH |
2329 | if (!strlist__has_entry(namelist, buf)) |
2330 | break; | |
2331 | } | |
146a1439 MH |
2332 | if (i == MAX_EVENT_INDEX) { |
2333 | pr_warning("Too many events are on the same function.\n"); | |
2334 | ret = -ERANGE; | |
2335 | } | |
2336 | ||
2337 | return ret; | |
b498ce1f MH |
2338 | } |
2339 | ||
79702f61 MH |
2340 | /* Warn if the current kernel's uprobe implementation is old */ |
2341 | static void warn_uprobe_event_compat(struct probe_trace_event *tev) | |
2342 | { | |
2343 | int i; | |
2344 | char *buf = synthesize_probe_trace_command(tev); | |
2345 | ||
2346 | /* Old uprobe event doesn't support memory dereference */ | |
2347 | if (!tev->uprobes || tev->nargs == 0 || !buf) | |
2348 | goto out; | |
2349 | ||
2350 | for (i = 0; i < tev->nargs; i++) | |
2351 | if (strglobmatch(tev->args[i].value, "[$@+-]*")) { | |
2352 | pr_warning("Please upgrade your kernel to at least " | |
2353 | "3.14 to have access to feature %s\n", | |
2354 | tev->args[i].value); | |
2355 | break; | |
2356 | } | |
2357 | out: | |
2358 | free(buf); | |
2359 | } | |
2360 | ||
0e60836b SD |
2361 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
2362 | struct probe_trace_event *tevs, | |
146a1439 | 2363 | int ntevs, bool allow_suffix) |
50656eec | 2364 | { |
146a1439 | 2365 | int i, fd, ret; |
0e60836b | 2366 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
2367 | char buf[64]; |
2368 | const char *event, *group; | |
b498ce1f | 2369 | struct strlist *namelist; |
9aaf5a5f MH |
2370 | LIST_HEAD(blacklist); |
2371 | struct kprobe_blacklist_node *node; | |
50656eec | 2372 | |
225466f1 SD |
2373 | if (pev->uprobes) |
2374 | fd = open_uprobe_events(true); | |
2375 | else | |
2376 | fd = open_kprobe_events(true); | |
2377 | ||
5e45187c MH |
2378 | if (fd < 0) { |
2379 | print_open_warning(fd, !pev->uprobes); | |
146a1439 | 2380 | return fd; |
5e45187c MH |
2381 | } |
2382 | ||
b498ce1f | 2383 | /* Get current event names */ |
0e60836b | 2384 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
2385 | if (!namelist) { |
2386 | pr_debug("Failed to get current event list.\n"); | |
2387 | return -EIO; | |
2388 | } | |
9aaf5a5f MH |
2389 | /* Get kprobe blacklist if exists */ |
2390 | if (!pev->uprobes) { | |
2391 | ret = kprobe_blacklist__load(&blacklist); | |
2392 | if (ret < 0) | |
2393 | pr_debug("No kprobe blacklist support, ignored\n"); | |
2394 | } | |
4235b045 | 2395 | |
146a1439 | 2396 | ret = 0; |
5e17b28f | 2397 | pr_info("Added new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 2398 | for (i = 0; i < ntevs; i++) { |
4235b045 | 2399 | tev = &tevs[i]; |
9aaf5a5f MH |
2400 | /* Ensure that the address is NOT blacklisted */ |
2401 | node = kprobe_blacklist__find_by_address(&blacklist, | |
2402 | tev->point.address); | |
2403 | if (node) { | |
2404 | pr_warning("Warning: Skipped probing on blacklisted function: %s\n", node->symbol); | |
2405 | continue; | |
2406 | } | |
2407 | ||
4235b045 MH |
2408 | if (pev->event) |
2409 | event = pev->event; | |
2410 | else | |
2411 | if (pev->point.function) | |
2412 | event = pev->point.function; | |
2413 | else | |
2414 | event = tev->point.symbol; | |
2415 | if (pev->group) | |
2416 | group = pev->group; | |
2417 | else | |
2418 | group = PERFPROBE_GROUP; | |
2419 | ||
2420 | /* Get an unused new event name */ | |
146a1439 MH |
2421 | ret = get_new_event_name(buf, 64, event, |
2422 | namelist, allow_suffix); | |
2423 | if (ret < 0) | |
2424 | break; | |
4235b045 MH |
2425 | event = buf; |
2426 | ||
02b95dad MH |
2427 | tev->event = strdup(event); |
2428 | tev->group = strdup(group); | |
2429 | if (tev->event == NULL || tev->group == NULL) { | |
2430 | ret = -ENOMEM; | |
2431 | break; | |
2432 | } | |
0e60836b | 2433 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
2434 | if (ret < 0) |
2435 | break; | |
4235b045 MH |
2436 | /* Add added event name to namelist */ |
2437 | strlist__add(namelist, event); | |
2438 | ||
2439 | /* Trick here - save current event/group */ | |
2440 | event = pev->event; | |
2441 | group = pev->group; | |
2442 | pev->event = tev->event; | |
2443 | pev->group = tev->group; | |
fb226ccd | 2444 | show_perf_probe_event(pev, tev->point.module); |
4235b045 MH |
2445 | /* Trick here - restore current event/group */ |
2446 | pev->event = (char *)event; | |
2447 | pev->group = (char *)group; | |
2448 | ||
2449 | /* | |
2450 | * Probes after the first probe which comes from same | |
2451 | * user input are always allowed to add suffix, because | |
2452 | * there might be several addresses corresponding to | |
2453 | * one code line. | |
2454 | */ | |
2455 | allow_suffix = true; | |
50656eec | 2456 | } |
79702f61 MH |
2457 | if (ret == -EINVAL && pev->uprobes) |
2458 | warn_uprobe_event_compat(tev); | |
146a1439 | 2459 | |
9aaf5a5f MH |
2460 | /* Note that it is possible to skip all events because of blacklist */ |
2461 | if (ret >= 0 && tev->event) { | |
146a1439 | 2462 | /* Show how to use the event. */ |
5e17b28f MH |
2463 | pr_info("\nYou can now use it in all perf tools, such as:\n\n"); |
2464 | pr_info("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
146a1439 MH |
2465 | tev->event); |
2466 | } | |
a9b495b0 | 2467 | |
9aaf5a5f | 2468 | kprobe_blacklist__delete(&blacklist); |
e1d2017b | 2469 | strlist__delete(namelist); |
50656eec | 2470 | close(fd); |
146a1439 | 2471 | return ret; |
50656eec | 2472 | } |
fa28244d | 2473 | |
564c62a4 | 2474 | static int find_probe_functions(struct map *map, char *name) |
eb948e50 | 2475 | { |
564c62a4 | 2476 | int found = 0; |
0a3873a8 | 2477 | struct symbol *sym; |
564c62a4 | 2478 | |
0a3873a8 | 2479 | map__for_each_symbol_by_name(map, name, sym) { |
e578da3b | 2480 | found++; |
eb948e50 | 2481 | } |
564c62a4 NK |
2482 | |
2483 | return found; | |
eb948e50 MH |
2484 | } |
2485 | ||
2486 | #define strdup_or_goto(str, label) \ | |
2487 | ({ char *__p = strdup(str); if (!__p) goto label; __p; }) | |
2488 | ||
7b6ff0bd NR |
2489 | void __weak arch__fix_tev_from_maps(struct perf_probe_event *pev __maybe_unused, |
2490 | struct probe_trace_event *tev __maybe_unused, | |
2491 | struct map *map __maybe_unused) { } | |
2492 | ||
eb948e50 MH |
2493 | /* |
2494 | * Find probe function addresses from map. | |
2495 | * Return an error or the number of found probe_trace_event | |
2496 | */ | |
2497 | static int find_probe_trace_events_from_map(struct perf_probe_event *pev, | |
2498 | struct probe_trace_event **tevs, | |
2499 | int max_tevs, const char *target) | |
e0faa8d3 | 2500 | { |
eb948e50 | 2501 | struct map *map = NULL; |
eb948e50 | 2502 | struct ref_reloc_sym *reloc_sym = NULL; |
e0faa8d3 | 2503 | struct symbol *sym; |
0e60836b | 2504 | struct probe_trace_event *tev; |
eb948e50 MH |
2505 | struct perf_probe_point *pp = &pev->point; |
2506 | struct probe_trace_point *tp; | |
564c62a4 | 2507 | int num_matched_functions; |
eb948e50 | 2508 | int ret, i; |
4235b045 | 2509 | |
9b118aca | 2510 | map = get_target_map(target, pev->uprobes); |
eb948e50 MH |
2511 | if (!map) { |
2512 | ret = -EINVAL; | |
2513 | goto out; | |
fb7345bb MH |
2514 | } |
2515 | ||
eb948e50 MH |
2516 | /* |
2517 | * Load matched symbols: Since the different local symbols may have | |
2518 | * same name but different addresses, this lists all the symbols. | |
2519 | */ | |
564c62a4 NK |
2520 | num_matched_functions = find_probe_functions(map, pp->function); |
2521 | if (num_matched_functions == 0) { | |
eb948e50 MH |
2522 | pr_err("Failed to find symbol %s in %s\n", pp->function, |
2523 | target ? : "kernel"); | |
2524 | ret = -ENOENT; | |
2525 | goto out; | |
2526 | } else if (num_matched_functions > max_tevs) { | |
2527 | pr_err("Too many functions matched in %s\n", | |
2528 | target ? : "kernel"); | |
2529 | ret = -E2BIG; | |
2530 | goto out; | |
fb7345bb MH |
2531 | } |
2532 | ||
25dd9171 | 2533 | if (!pev->uprobes && !pp->retprobe) { |
0560a0c4 | 2534 | reloc_sym = kernel_get_ref_reloc_sym(); |
eb948e50 MH |
2535 | if (!reloc_sym) { |
2536 | pr_warning("Relocated base symbol is not found!\n"); | |
2537 | ret = -EINVAL; | |
2538 | goto out; | |
2539 | } | |
2540 | } | |
4235b045 | 2541 | |
eb948e50 MH |
2542 | /* Setup result trace-probe-events */ |
2543 | *tevs = zalloc(sizeof(*tev) * num_matched_functions); | |
2544 | if (!*tevs) { | |
02b95dad | 2545 | ret = -ENOMEM; |
eb948e50 | 2546 | goto out; |
02b95dad | 2547 | } |
ce27a443 | 2548 | |
eb948e50 | 2549 | ret = 0; |
564c62a4 | 2550 | |
0a3873a8 | 2551 | map__for_each_symbol_by_name(map, pp->function, sym) { |
eb948e50 MH |
2552 | tev = (*tevs) + ret; |
2553 | tp = &tev->point; | |
2554 | if (ret == num_matched_functions) { | |
2555 | pr_warning("Too many symbols are listed. Skip it.\n"); | |
2556 | break; | |
ce27a443 | 2557 | } |
eb948e50 | 2558 | ret++; |
ce27a443 | 2559 | |
eb948e50 MH |
2560 | if (pp->offset > sym->end - sym->start) { |
2561 | pr_warning("Offset %ld is bigger than the size of %s\n", | |
2562 | pp->offset, sym->name); | |
2563 | ret = -ENOENT; | |
2564 | goto err_out; | |
2565 | } | |
2566 | /* Add one probe point */ | |
2567 | tp->address = map->unmap_ip(map, sym->start) + pp->offset; | |
2568 | if (reloc_sym) { | |
2569 | tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out); | |
2570 | tp->offset = tp->address - reloc_sym->addr; | |
2571 | } else { | |
2572 | tp->symbol = strdup_or_goto(sym->name, nomem_out); | |
2573 | tp->offset = pp->offset; | |
2574 | } | |
2575 | tp->retprobe = pp->retprobe; | |
2576 | if (target) | |
2577 | tev->point.module = strdup_or_goto(target, nomem_out); | |
2578 | tev->uprobes = pev->uprobes; | |
2579 | tev->nargs = pev->nargs; | |
2580 | if (tev->nargs) { | |
2581 | tev->args = zalloc(sizeof(struct probe_trace_arg) * | |
2582 | tev->nargs); | |
2583 | if (tev->args == NULL) | |
2584 | goto nomem_out; | |
e334016f | 2585 | } |
48481938 | 2586 | for (i = 0; i < tev->nargs; i++) { |
eb948e50 MH |
2587 | if (pev->args[i].name) |
2588 | tev->args[i].name = | |
2589 | strdup_or_goto(pev->args[i].name, | |
2590 | nomem_out); | |
2591 | ||
2592 | tev->args[i].value = strdup_or_goto(pev->args[i].var, | |
2593 | nomem_out); | |
2594 | if (pev->args[i].type) | |
2595 | tev->args[i].type = | |
2596 | strdup_or_goto(pev->args[i].type, | |
2597 | nomem_out); | |
48481938 | 2598 | } |
7b6ff0bd | 2599 | arch__fix_tev_from_maps(pev, tev, map); |
4235b045 MH |
2600 | } |
2601 | ||
eb948e50 | 2602 | out: |
9b118aca | 2603 | put_target_map(map, pev->uprobes); |
eb948e50 | 2604 | return ret; |
225466f1 | 2605 | |
eb948e50 MH |
2606 | nomem_out: |
2607 | ret = -ENOMEM; | |
2608 | err_out: | |
2609 | clear_probe_trace_events(*tevs, num_matched_functions); | |
2610 | zfree(tevs); | |
2611 | goto out; | |
2612 | } | |
1c1bc922 | 2613 | |
d5c2e2c1 NR |
2614 | bool __weak arch__prefers_symtab(void) { return false; } |
2615 | ||
eb948e50 MH |
2616 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
2617 | struct probe_trace_event **tevs, | |
2618 | int max_tevs, const char *target) | |
2619 | { | |
2620 | int ret; | |
2621 | ||
2622 | if (pev->uprobes && !pev->group) { | |
2623 | /* Replace group name if not given */ | |
2624 | ret = convert_exec_to_group(target, &pev->group); | |
2625 | if (ret != 0) { | |
2626 | pr_warning("Failed to make a group name.\n"); | |
2627 | return ret; | |
2628 | } | |
02b95dad | 2629 | } |
e334016f | 2630 | |
d5c2e2c1 NR |
2631 | if (arch__prefers_symtab() && !perf_probe_event_need_dwarf(pev)) { |
2632 | ret = find_probe_trace_events_from_map(pev, tevs, max_tevs, target); | |
2633 | if (ret > 0) | |
2634 | return ret; /* Found in symbol table */ | |
2635 | } | |
2636 | ||
eb948e50 MH |
2637 | /* Convert perf_probe_event with debuginfo */ |
2638 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, target); | |
2639 | if (ret != 0) | |
2640 | return ret; /* Found in debuginfo or got an error */ | |
2641 | ||
2642 | return find_probe_trace_events_from_map(pev, tevs, max_tevs, target); | |
4235b045 MH |
2643 | } |
2644 | ||
2645 | struct __event_package { | |
2646 | struct perf_probe_event *pev; | |
0e60836b | 2647 | struct probe_trace_event *tevs; |
4235b045 MH |
2648 | int ntevs; |
2649 | }; | |
2650 | ||
146a1439 | 2651 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
7afb3fab | 2652 | int max_tevs, bool force_add) |
4235b045 | 2653 | { |
146a1439 | 2654 | int i, j, ret; |
4235b045 MH |
2655 | struct __event_package *pkgs; |
2656 | ||
225466f1 | 2657 | ret = 0; |
e334016f | 2658 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
225466f1 | 2659 | |
e334016f MH |
2660 | if (pkgs == NULL) |
2661 | return -ENOMEM; | |
4235b045 | 2662 | |
ee45b6c2 | 2663 | ret = init_symbol_maps(pevs->uprobes); |
449e5b24 MH |
2664 | if (ret < 0) { |
2665 | free(pkgs); | |
146a1439 | 2666 | return ret; |
449e5b24 | 2667 | } |
4235b045 MH |
2668 | |
2669 | /* Loop 1: convert all events */ | |
2670 | for (i = 0; i < npevs; i++) { | |
2671 | pkgs[i].pev = &pevs[i]; | |
2672 | /* Convert with or without debuginfo */ | |
0e60836b | 2673 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
2674 | &pkgs[i].tevs, |
2675 | max_tevs, | |
7afb3fab | 2676 | pkgs[i].pev->target); |
146a1439 MH |
2677 | if (ret < 0) |
2678 | goto end; | |
2679 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
2680 | } |
2681 | ||
4235b045 | 2682 | /* Loop 2: add all events */ |
8635bf6e | 2683 | for (i = 0; i < npevs; i++) { |
0e60836b | 2684 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 | 2685 | pkgs[i].ntevs, force_add); |
fbee632d ACM |
2686 | if (ret < 0) |
2687 | break; | |
2688 | } | |
146a1439 | 2689 | end: |
449e5b24 MH |
2690 | /* Loop 3: cleanup and free trace events */ |
2691 | for (i = 0; i < npevs; i++) { | |
146a1439 | 2692 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 2693 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
74cf249d | 2694 | zfree(&pkgs[i].tevs); |
449e5b24 MH |
2695 | } |
2696 | free(pkgs); | |
ee45b6c2 | 2697 | exit_symbol_maps(); |
146a1439 MH |
2698 | |
2699 | return ret; | |
e0faa8d3 MH |
2700 | } |
2701 | ||
0e60836b | 2702 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
2703 | { |
2704 | char *p; | |
2705 | char buf[128]; | |
4235b045 | 2706 | int ret; |
bbbb521b | 2707 | |
0e60836b | 2708 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
2709 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
2710 | if (ret < 0) | |
2711 | goto error; | |
2712 | ||
bbbb521b | 2713 | p = strchr(buf + 2, ':'); |
146a1439 MH |
2714 | if (!p) { |
2715 | pr_debug("Internal error: %s should have ':' but not.\n", | |
2716 | ent->s); | |
2717 | ret = -ENOTSUP; | |
2718 | goto error; | |
2719 | } | |
bbbb521b MH |
2720 | *p = '/'; |
2721 | ||
4235b045 MH |
2722 | pr_debug("Writing event: %s\n", buf); |
2723 | ret = write(fd, buf, strlen(buf)); | |
44a56040 MH |
2724 | if (ret < 0) { |
2725 | ret = -errno; | |
146a1439 | 2726 | goto error; |
44a56040 | 2727 | } |
146a1439 | 2728 | |
5e17b28f | 2729 | pr_info("Removed event: %s\n", ent->s); |
146a1439 MH |
2730 | return 0; |
2731 | error: | |
5f03cba4 MH |
2732 | pr_warning("Failed to delete event: %s\n", |
2733 | strerror_r(-ret, buf, sizeof(buf))); | |
146a1439 | 2734 | return ret; |
bbbb521b MH |
2735 | } |
2736 | ||
307a464b MH |
2737 | static int del_trace_probe_events(int fd, struct strfilter *filter, |
2738 | struct strlist *namelist) | |
fa28244d | 2739 | { |
307a464b MH |
2740 | struct str_node *ent; |
2741 | const char *p; | |
6dbe31f7 | 2742 | int ret = -ENOENT; |
fa28244d | 2743 | |
307a464b MH |
2744 | if (!namelist) |
2745 | return -ENOENT; | |
2746 | ||
2747 | strlist__for_each(ent, namelist) { | |
2748 | p = strchr(ent->s, ':'); | |
2749 | if ((p && strfilter__compare(filter, p + 1)) || | |
2750 | strfilter__compare(filter, ent->s)) { | |
0e60836b | 2751 | ret = __del_trace_probe_event(fd, ent); |
307a464b MH |
2752 | if (ret < 0) |
2753 | break; | |
bbbb521b MH |
2754 | } |
2755 | } | |
146a1439 MH |
2756 | |
2757 | return ret; | |
fa28244d MH |
2758 | } |
2759 | ||
307a464b | 2760 | int del_perf_probe_events(struct strfilter *filter) |
fa28244d | 2761 | { |
307a464b | 2762 | int ret, ret2, ufd = -1, kfd = -1; |
225466f1 | 2763 | struct strlist *namelist = NULL, *unamelist = NULL; |
307a464b MH |
2764 | char *str = strfilter__string(filter); |
2765 | ||
2766 | if (!str) | |
2767 | return -EINVAL; | |
2768 | ||
2769 | pr_debug("Delete filter: \'%s\'\n", str); | |
146a1439 | 2770 | |
fa28244d | 2771 | /* Get current event names */ |
225466f1 | 2772 | kfd = open_kprobe_events(true); |
467ec085 MH |
2773 | if (kfd >= 0) |
2774 | namelist = get_probe_trace_event_names(kfd, true); | |
225466f1 | 2775 | |
225466f1 | 2776 | ufd = open_uprobe_events(true); |
467ec085 | 2777 | if (ufd >= 0) |
225466f1 SD |
2778 | unamelist = get_probe_trace_event_names(ufd, true); |
2779 | ||
467ec085 MH |
2780 | if (kfd < 0 && ufd < 0) { |
2781 | print_both_open_warning(kfd, ufd); | |
307a464b | 2782 | ret = kfd; |
467ec085 MH |
2783 | goto error; |
2784 | } | |
2785 | ||
307a464b MH |
2786 | ret = del_trace_probe_events(kfd, filter, namelist); |
2787 | if (ret < 0 && ret != -ENOENT) | |
225466f1 | 2788 | goto error; |
225466f1 | 2789 | |
307a464b MH |
2790 | ret2 = del_trace_probe_events(ufd, filter, unamelist); |
2791 | if (ret2 < 0 && ret2 != -ENOENT) | |
2792 | ret = ret2; | |
2793 | else if (ret == -ENOENT && ret2 == -ENOENT) { | |
2794 | pr_debug("\"%s\" does not hit any event.\n", str); | |
2795 | /* Note that this is silently ignored */ | |
2796 | ret = 0; | |
fa28244d | 2797 | } |
225466f1 SD |
2798 | |
2799 | error: | |
2800 | if (kfd >= 0) { | |
a23c4dc4 | 2801 | strlist__delete(namelist); |
225466f1 SD |
2802 | close(kfd); |
2803 | } | |
2804 | ||
2805 | if (ufd >= 0) { | |
a23c4dc4 | 2806 | strlist__delete(unamelist); |
225466f1 SD |
2807 | close(ufd); |
2808 | } | |
307a464b | 2809 | free(str); |
146a1439 MH |
2810 | |
2811 | return ret; | |
fa28244d | 2812 | } |
225466f1 | 2813 | |
3c42258c MH |
2814 | /* TODO: don't use a global variable for filter ... */ |
2815 | static struct strfilter *available_func_filter; | |
fa28244d | 2816 | |
e80711ca | 2817 | /* |
3c42258c MH |
2818 | * If a symbol corresponds to a function with global binding and |
2819 | * matches filter return 0. For all others return 1. | |
e80711ca | 2820 | */ |
1d037ca1 | 2821 | static int filter_available_functions(struct map *map __maybe_unused, |
3c42258c | 2822 | struct symbol *sym) |
e80711ca | 2823 | { |
e578da3b | 2824 | if (strfilter__compare(available_func_filter, sym->name)) |
3c42258c MH |
2825 | return 0; |
2826 | return 1; | |
e80711ca MH |
2827 | } |
2828 | ||
2df58634 MH |
2829 | int show_available_funcs(const char *target, struct strfilter *_filter, |
2830 | bool user) | |
e80711ca MH |
2831 | { |
2832 | struct map *map; | |
2833 | int ret; | |
2834 | ||
2df58634 | 2835 | ret = init_symbol_maps(user); |
e80711ca MH |
2836 | if (ret < 0) |
2837 | return ret; | |
2838 | ||
2df58634 MH |
2839 | /* Get a symbol map */ |
2840 | if (user) | |
2841 | map = dso__new_map(target); | |
2842 | else | |
2843 | map = kernel_get_module_map(target); | |
e80711ca | 2844 | if (!map) { |
2df58634 | 2845 | pr_err("Failed to get a map for %s\n", (target) ? : "kernel"); |
e80711ca MH |
2846 | return -EINVAL; |
2847 | } | |
225466f1 | 2848 | |
2df58634 | 2849 | /* Load symbols with given filter */ |
3c42258c | 2850 | available_func_filter = _filter; |
2df58634 MH |
2851 | if (map__load(map, filter_available_functions)) { |
2852 | pr_err("Failed to load symbols in %s\n", (target) ? : "kernel"); | |
2853 | goto end; | |
2854 | } | |
2855 | if (!dso__sorted_by_name(map->dso, map->type)) | |
2856 | dso__sort_by_name(map->dso, map->type); | |
225466f1 | 2857 | |
2df58634 MH |
2858 | /* Show all (filtered) symbols */ |
2859 | setup_pager(); | |
2860 | dso__fprintf_symbols_by_name(map->dso, map->type, stdout); | |
2861 | end: | |
2862 | if (user) { | |
2863 | dso__delete(map->dso); | |
2864 | map__delete(map); | |
2865 | } | |
2866 | exit_symbol_maps(); | |
225466f1 | 2867 | |
2df58634 | 2868 | return ret; |
225466f1 SD |
2869 | } |
2870 |