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 | 53 | bool probe_event_dry_run; /* Dry run flag */ |
ddb2f58f | 54 | struct probe_conf probe_conf; |
f4d7da49 | 55 | |
146a1439 | 56 | #define semantic_error(msg ...) pr_err("Semantic error :" msg) |
50656eec | 57 | |
4de189fe | 58 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
59 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
60 | __attribute__((format(printf, 3, 4))); | |
61 | ||
4de189fe MH |
62 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
63 | { | |
64 | int ret; | |
65 | va_list ap; | |
66 | va_start(ap, format); | |
67 | ret = vsnprintf(str, size, format, ap); | |
68 | va_end(ap); | |
69 | if (ret >= (int)size) | |
70 | ret = -E2BIG; | |
71 | return ret; | |
72 | } | |
73 | ||
4b4da7f7 | 74 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp); |
981d05ad | 75 | static void clear_probe_trace_event(struct probe_trace_event *tev); |
ee45b6c2 | 76 | static struct machine *host_machine; |
e0faa8d3 | 77 | |
469b9b88 | 78 | /* Initialize symbol maps and path of vmlinux/modules */ |
ee45b6c2 | 79 | static int init_symbol_maps(bool user_only) |
e0faa8d3 | 80 | { |
146a1439 MH |
81 | int ret; |
82 | ||
e0faa8d3 | 83 | symbol_conf.sort_by_name = true; |
680d926a | 84 | symbol_conf.allow_aliases = true; |
0a7e6d1b | 85 | ret = symbol__init(NULL); |
146a1439 MH |
86 | if (ret < 0) { |
87 | pr_debug("Failed to init symbol map.\n"); | |
88 | goto out; | |
89 | } | |
e0faa8d3 | 90 | |
ee45b6c2 MH |
91 | if (host_machine || user_only) /* already initialized */ |
92 | return 0; | |
d28c6223 | 93 | |
ee45b6c2 MH |
94 | if (symbol_conf.vmlinux_name) |
95 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
96 | ||
97 | host_machine = machine__new_host(); | |
98 | if (!host_machine) { | |
99 | pr_debug("machine__new_host() failed.\n"); | |
100 | symbol__exit(); | |
101 | ret = -1; | |
469b9b88 | 102 | } |
146a1439 MH |
103 | out: |
104 | if (ret < 0) | |
105 | pr_warning("Failed to init vmlinux path.\n"); | |
106 | return ret; | |
e0faa8d3 MH |
107 | } |
108 | ||
ee45b6c2 MH |
109 | static void exit_symbol_maps(void) |
110 | { | |
111 | if (host_machine) { | |
112 | machine__delete(host_machine); | |
113 | host_machine = NULL; | |
114 | } | |
115 | symbol__exit(); | |
116 | } | |
117 | ||
469b9b88 MH |
118 | static struct symbol *__find_kernel_function_by_name(const char *name, |
119 | struct map **mapp) | |
120 | { | |
ee45b6c2 | 121 | return machine__find_kernel_function_by_name(host_machine, name, mapp, |
469b9b88 MH |
122 | NULL); |
123 | } | |
124 | ||
8f33f7de MH |
125 | static struct symbol *__find_kernel_function(u64 addr, struct map **mapp) |
126 | { | |
127 | return machine__find_kernel_function(host_machine, addr, mapp, NULL); | |
128 | } | |
129 | ||
130 | static struct ref_reloc_sym *kernel_get_ref_reloc_sym(void) | |
131 | { | |
132 | /* kmap->ref_reloc_sym should be set if host_machine is initialized */ | |
133 | struct kmap *kmap; | |
134 | ||
135 | if (map__load(host_machine->vmlinux_maps[MAP__FUNCTION], NULL) < 0) | |
136 | return NULL; | |
137 | ||
138 | kmap = map__kmap(host_machine->vmlinux_maps[MAP__FUNCTION]); | |
ba92732e WN |
139 | if (!kmap) |
140 | return NULL; | |
8f33f7de MH |
141 | return kmap->ref_reloc_sym; |
142 | } | |
143 | ||
144 | static u64 kernel_get_symbol_address_by_name(const char *name, bool reloc) | |
145 | { | |
146 | struct ref_reloc_sym *reloc_sym; | |
147 | struct symbol *sym; | |
148 | struct map *map; | |
149 | ||
150 | /* ref_reloc_sym is just a label. Need a special fix*/ | |
151 | reloc_sym = kernel_get_ref_reloc_sym(); | |
152 | if (reloc_sym && strcmp(name, reloc_sym->name) == 0) | |
153 | return (reloc) ? reloc_sym->addr : reloc_sym->unrelocated_addr; | |
154 | else { | |
155 | sym = __find_kernel_function_by_name(name, &map); | |
156 | if (sym) | |
157 | return map->unmap_ip(map, sym->start) - | |
f56847c2 | 158 | ((reloc) ? 0 : map->reloc); |
8f33f7de MH |
159 | } |
160 | return 0; | |
161 | } | |
162 | ||
e80711ca MH |
163 | static struct map *kernel_get_module_map(const char *module) |
164 | { | |
ee45b6c2 | 165 | struct map_groups *grp = &host_machine->kmaps; |
1eee78ae | 166 | struct maps *maps = &grp->maps[MAP__FUNCTION]; |
4bb7123d | 167 | struct map *pos; |
e80711ca | 168 | |
14a8fd7c MH |
169 | /* A file path -- this is an offline module */ |
170 | if (module && strchr(module, '/')) | |
9f2de315 | 171 | return machine__findnew_module_map(host_machine, 0, module); |
14a8fd7c | 172 | |
e80711ca MH |
173 | if (!module) |
174 | module = "kernel"; | |
175 | ||
4bb7123d | 176 | for (pos = maps__first(maps); pos; pos = map__next(pos)) { |
e80711ca MH |
177 | if (strncmp(pos->dso->short_name + 1, module, |
178 | pos->dso->short_name_len - 2) == 0) { | |
179 | return pos; | |
180 | } | |
181 | } | |
182 | return NULL; | |
183 | } | |
184 | ||
9b118aca MH |
185 | static struct map *get_target_map(const char *target, bool user) |
186 | { | |
187 | /* Init maps of given executable or kernel */ | |
188 | if (user) | |
189 | return dso__new_map(target); | |
190 | else | |
191 | return kernel_get_module_map(target); | |
192 | } | |
193 | ||
194 | static void put_target_map(struct map *map, bool user) | |
195 | { | |
196 | if (map && user) { | |
197 | /* Only the user map needs to be released */ | |
84c2cafa | 198 | map__put(map); |
9b118aca MH |
199 | } |
200 | } | |
201 | ||
202 | ||
fb7345bb MH |
203 | static int convert_exec_to_group(const char *exec, char **result) |
204 | { | |
205 | char *ptr1, *ptr2, *exec_copy; | |
206 | char buf[64]; | |
207 | int ret; | |
208 | ||
209 | exec_copy = strdup(exec); | |
210 | if (!exec_copy) | |
211 | return -ENOMEM; | |
212 | ||
213 | ptr1 = basename(exec_copy); | |
214 | if (!ptr1) { | |
215 | ret = -EINVAL; | |
216 | goto out; | |
217 | } | |
218 | ||
219 | ptr2 = strpbrk(ptr1, "-._"); | |
220 | if (ptr2) | |
221 | *ptr2 = '\0'; | |
222 | ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1); | |
223 | if (ret < 0) | |
224 | goto out; | |
225 | ||
226 | *result = strdup(buf); | |
227 | ret = *result ? 0 : -ENOMEM; | |
228 | ||
229 | out: | |
230 | free(exec_copy); | |
231 | return ret; | |
232 | } | |
233 | ||
9b118aca MH |
234 | static void clear_perf_probe_point(struct perf_probe_point *pp) |
235 | { | |
236 | free(pp->file); | |
237 | free(pp->function); | |
238 | free(pp->lazy_line); | |
239 | } | |
240 | ||
eb948e50 MH |
241 | static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs) |
242 | { | |
243 | int i; | |
244 | ||
245 | for (i = 0; i < ntevs; i++) | |
246 | clear_probe_trace_event(tevs + i); | |
247 | } | |
248 | ||
b031220d MH |
249 | static bool kprobe_blacklist__listed(unsigned long address); |
250 | static bool kprobe_warn_out_range(const char *symbol, unsigned long address) | |
251 | { | |
7c31bb8c HK |
252 | u64 etext_addr; |
253 | ||
b031220d | 254 | /* Get the address of _etext for checking non-probable text symbol */ |
7c31bb8c HK |
255 | etext_addr = kernel_get_symbol_address_by_name("_etext", false); |
256 | ||
257 | if (etext_addr != 0 && etext_addr < address) | |
b031220d MH |
258 | pr_warning("%s is out of .text, skip it.\n", symbol); |
259 | else if (kprobe_blacklist__listed(address)) | |
260 | pr_warning("%s is blacklisted function, skip it.\n", symbol); | |
261 | else | |
262 | return false; | |
263 | ||
264 | return true; | |
265 | } | |
266 | ||
89fe808a | 267 | #ifdef HAVE_DWARF_SUPPORT |
60fb7742 WN |
268 | |
269 | static int kernel_get_module_dso(const char *module, struct dso **pdso) | |
270 | { | |
271 | struct dso *dso; | |
272 | struct map *map; | |
273 | const char *vmlinux_name; | |
274 | int ret = 0; | |
275 | ||
276 | if (module) { | |
3d39ac53 ACM |
277 | list_for_each_entry(dso, &host_machine->dsos.head, node) { |
278 | if (!dso->kernel) | |
279 | continue; | |
60fb7742 WN |
280 | if (strncmp(dso->short_name + 1, module, |
281 | dso->short_name_len - 2) == 0) | |
282 | goto found; | |
283 | } | |
284 | pr_debug("Failed to find module %s.\n", module); | |
285 | return -ENOENT; | |
286 | } | |
287 | ||
288 | map = host_machine->vmlinux_maps[MAP__FUNCTION]; | |
289 | dso = map->dso; | |
290 | ||
291 | vmlinux_name = symbol_conf.vmlinux_name; | |
292 | dso->load_errno = 0; | |
293 | if (vmlinux_name) | |
294 | ret = dso__load_vmlinux(dso, map, vmlinux_name, false, NULL); | |
295 | else | |
296 | ret = dso__load_vmlinux_path(dso, map, NULL); | |
297 | found: | |
298 | *pdso = dso; | |
299 | return ret; | |
300 | } | |
301 | ||
9b118aca MH |
302 | /* |
303 | * Some binaries like glibc have special symbols which are on the symbol | |
304 | * table, but not in the debuginfo. If we can find the address of the | |
305 | * symbol from map, we can translate the address back to the probe point. | |
306 | */ | |
307 | static int find_alternative_probe_point(struct debuginfo *dinfo, | |
308 | struct perf_probe_point *pp, | |
309 | struct perf_probe_point *result, | |
310 | const char *target, bool uprobes) | |
311 | { | |
312 | struct map *map = NULL; | |
313 | struct symbol *sym; | |
314 | u64 address = 0; | |
315 | int ret = -ENOENT; | |
316 | ||
317 | /* This can work only for function-name based one */ | |
318 | if (!pp->function || pp->file) | |
319 | return -ENOTSUP; | |
320 | ||
321 | map = get_target_map(target, uprobes); | |
322 | if (!map) | |
323 | return -EINVAL; | |
324 | ||
325 | /* Find the address of given function */ | |
326 | map__for_each_symbol_by_name(map, pp->function, sym) { | |
e6d7c91c MH |
327 | if (uprobes) |
328 | address = sym->start; | |
329 | else | |
330 | address = map->unmap_ip(map, sym->start); | |
e578da3b | 331 | break; |
9b118aca MH |
332 | } |
333 | if (!address) { | |
334 | ret = -ENOENT; | |
335 | goto out; | |
336 | } | |
f6c15621 WN |
337 | pr_debug("Symbol %s address found : %" PRIx64 "\n", |
338 | pp->function, address); | |
9b118aca MH |
339 | |
340 | ret = debuginfo__find_probe_point(dinfo, (unsigned long)address, | |
341 | result); | |
342 | if (ret <= 0) | |
343 | ret = (!ret) ? -ENOENT : ret; | |
344 | else { | |
345 | result->offset += pp->offset; | |
346 | result->line += pp->line; | |
9d7b45c5 | 347 | result->retprobe = pp->retprobe; |
9b118aca MH |
348 | ret = 0; |
349 | } | |
350 | ||
351 | out: | |
352 | put_target_map(map, uprobes); | |
353 | return ret; | |
354 | ||
355 | } | |
356 | ||
357 | static int get_alternative_probe_event(struct debuginfo *dinfo, | |
358 | struct perf_probe_event *pev, | |
44225521 | 359 | struct perf_probe_point *tmp) |
9b118aca MH |
360 | { |
361 | int ret; | |
362 | ||
363 | memcpy(tmp, &pev->point, sizeof(*tmp)); | |
364 | memset(&pev->point, 0, sizeof(pev->point)); | |
365 | ret = find_alternative_probe_point(dinfo, tmp, &pev->point, | |
44225521 | 366 | pev->target, pev->uprobes); |
9b118aca MH |
367 | if (ret < 0) |
368 | memcpy(&pev->point, tmp, sizeof(*tmp)); | |
369 | ||
370 | return ret; | |
371 | } | |
a15ad2f5 | 372 | |
811dd2ae MH |
373 | static int get_alternative_line_range(struct debuginfo *dinfo, |
374 | struct line_range *lr, | |
375 | const char *target, bool user) | |
376 | { | |
6d4a4896 DA |
377 | struct perf_probe_point pp = { .function = lr->function, |
378 | .file = lr->file, | |
379 | .line = lr->start }; | |
380 | struct perf_probe_point result; | |
811dd2ae MH |
381 | int ret, len = 0; |
382 | ||
6d4a4896 DA |
383 | memset(&result, 0, sizeof(result)); |
384 | ||
811dd2ae MH |
385 | if (lr->end != INT_MAX) |
386 | len = lr->end - lr->start; | |
387 | ret = find_alternative_probe_point(dinfo, &pp, &result, | |
388 | target, user); | |
389 | if (!ret) { | |
390 | lr->function = result.function; | |
391 | lr->file = result.file; | |
392 | lr->start = result.line; | |
393 | if (lr->end != INT_MAX) | |
394 | lr->end = lr->start + len; | |
395 | clear_perf_probe_point(&pp); | |
396 | } | |
397 | return ret; | |
398 | } | |
399 | ||
ff741783 | 400 | /* Open new debuginfo of given module */ |
92561cb7 | 401 | static struct debuginfo *open_debuginfo(const char *module, bool silent) |
e0faa8d3 | 402 | { |
a15ad2f5 | 403 | const char *path = module; |
419e8738 MH |
404 | char reason[STRERR_BUFSIZE]; |
405 | struct debuginfo *ret = NULL; | |
406 | struct dso *dso = NULL; | |
407 | int err; | |
ff741783 | 408 | |
a15ad2f5 | 409 | if (!module || !strchr(module, '/')) { |
419e8738 MH |
410 | err = kernel_get_module_dso(module, &dso); |
411 | if (err < 0) { | |
412 | if (!dso || dso->load_errno == 0) { | |
413 | if (!strerror_r(-err, reason, STRERR_BUFSIZE)) | |
414 | strcpy(reason, "(unknown)"); | |
415 | } else | |
416 | dso__strerror_load(dso, reason, STRERR_BUFSIZE); | |
92561cb7 | 417 | if (!silent) |
419e8738 MH |
418 | pr_err("Failed to find the path for %s: %s\n", |
419 | module ?: "kernel", reason); | |
14a8fd7c MH |
420 | return NULL; |
421 | } | |
419e8738 | 422 | path = dso->long_name; |
e0faa8d3 | 423 | } |
92561cb7 MH |
424 | ret = debuginfo__new(path); |
425 | if (!ret && !silent) { | |
426 | pr_warning("The %s file has no debug information.\n", path); | |
427 | if (!module || !strtailcmp(path, ".ko")) | |
428 | pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, "); | |
429 | else | |
430 | pr_warning("Rebuild with -g, "); | |
431 | pr_warning("or install an appropriate debuginfo package.\n"); | |
432 | } | |
433 | return ret; | |
e0faa8d3 | 434 | } |
4b4da7f7 | 435 | |
7737af01 MH |
436 | /* For caching the last debuginfo */ |
437 | static struct debuginfo *debuginfo_cache; | |
438 | static char *debuginfo_cache_path; | |
439 | ||
440 | static struct debuginfo *debuginfo_cache__open(const char *module, bool silent) | |
441 | { | |
442 | if ((debuginfo_cache_path && !strcmp(debuginfo_cache_path, module)) || | |
443 | (!debuginfo_cache_path && !module && debuginfo_cache)) | |
444 | goto out; | |
445 | ||
446 | /* Copy module path */ | |
447 | free(debuginfo_cache_path); | |
448 | if (module) { | |
449 | debuginfo_cache_path = strdup(module); | |
450 | if (!debuginfo_cache_path) { | |
451 | debuginfo__delete(debuginfo_cache); | |
452 | debuginfo_cache = NULL; | |
453 | goto out; | |
454 | } | |
455 | } | |
456 | ||
457 | debuginfo_cache = open_debuginfo(module, silent); | |
458 | if (!debuginfo_cache) | |
459 | zfree(&debuginfo_cache_path); | |
460 | out: | |
461 | return debuginfo_cache; | |
462 | } | |
463 | ||
464 | static void debuginfo_cache__exit(void) | |
465 | { | |
466 | debuginfo__delete(debuginfo_cache); | |
467 | debuginfo_cache = NULL; | |
468 | zfree(&debuginfo_cache_path); | |
469 | } | |
470 | ||
92561cb7 | 471 | |
99ca4233 MH |
472 | static int get_text_start_address(const char *exec, unsigned long *address) |
473 | { | |
474 | Elf *elf; | |
475 | GElf_Ehdr ehdr; | |
476 | GElf_Shdr shdr; | |
477 | int fd, ret = -ENOENT; | |
478 | ||
479 | fd = open(exec, O_RDONLY); | |
480 | if (fd < 0) | |
481 | return -errno; | |
482 | ||
483 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
484 | if (elf == NULL) | |
485 | return -EINVAL; | |
486 | ||
487 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
488 | goto out; | |
489 | ||
490 | if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL)) | |
491 | goto out; | |
492 | ||
493 | *address = shdr.sh_addr - shdr.sh_offset; | |
494 | ret = 0; | |
495 | out: | |
496 | elf_end(elf); | |
497 | return ret; | |
498 | } | |
499 | ||
5a6f6314 MH |
500 | /* |
501 | * Convert trace point to probe point with debuginfo | |
502 | */ | |
503 | static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp, | |
504 | struct perf_probe_point *pp, | |
505 | bool is_kprobe) | |
506 | { | |
507 | struct debuginfo *dinfo = NULL; | |
508 | unsigned long stext = 0; | |
509 | u64 addr = tp->address; | |
510 | int ret = -ENOENT; | |
511 | ||
512 | /* convert the address to dwarf address */ | |
513 | if (!is_kprobe) { | |
514 | if (!addr) { | |
515 | ret = -EINVAL; | |
516 | goto error; | |
517 | } | |
518 | ret = get_text_start_address(tp->module, &stext); | |
519 | if (ret < 0) | |
520 | goto error; | |
521 | addr += stext; | |
522 | } else { | |
523 | addr = kernel_get_symbol_address_by_name(tp->symbol, false); | |
524 | if (addr == 0) | |
525 | goto error; | |
526 | addr += tp->offset; | |
527 | } | |
528 | ||
529 | pr_debug("try to find information at %" PRIx64 " in %s\n", addr, | |
530 | tp->module ? : "kernel"); | |
531 | ||
7737af01 MH |
532 | dinfo = debuginfo_cache__open(tp->module, verbose == 0); |
533 | if (dinfo) | |
5a6f6314 MH |
534 | ret = debuginfo__find_probe_point(dinfo, |
535 | (unsigned long)addr, pp); | |
7737af01 | 536 | else |
5a6f6314 | 537 | ret = -ENOENT; |
5a6f6314 MH |
538 | |
539 | if (ret > 0) { | |
540 | pp->retprobe = tp->retprobe; | |
541 | return 0; | |
542 | } | |
543 | error: | |
544 | pr_debug("Failed to find corresponding probes from debuginfo.\n"); | |
545 | return ret ? : -ENOENT; | |
546 | } | |
547 | ||
fb7345bb MH |
548 | static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs, |
549 | int ntevs, const char *exec) | |
550 | { | |
551 | int i, ret = 0; | |
eb948e50 | 552 | unsigned long stext = 0; |
fb7345bb MH |
553 | |
554 | if (!exec) | |
555 | return 0; | |
556 | ||
557 | ret = get_text_start_address(exec, &stext); | |
558 | if (ret < 0) | |
559 | return ret; | |
560 | ||
561 | for (i = 0; i < ntevs && ret >= 0; i++) { | |
981a2379 | 562 | /* point.address is the addres of point.symbol + point.offset */ |
eb948e50 | 563 | tevs[i].point.address -= stext; |
fb7345bb | 564 | tevs[i].point.module = strdup(exec); |
eb948e50 | 565 | if (!tevs[i].point.module) { |
fb7345bb MH |
566 | ret = -ENOMEM; |
567 | break; | |
568 | } | |
569 | tevs[i].uprobes = true; | |
570 | } | |
571 | ||
572 | return ret; | |
573 | } | |
574 | ||
190b57fc MH |
575 | static int add_module_to_probe_trace_events(struct probe_trace_event *tevs, |
576 | int ntevs, const char *module) | |
577 | { | |
14a8fd7c MH |
578 | int i, ret = 0; |
579 | char *tmp; | |
580 | ||
581 | if (!module) | |
582 | return 0; | |
583 | ||
584 | tmp = strrchr(module, '/'); | |
585 | if (tmp) { | |
586 | /* This is a module path -- get the module name */ | |
587 | module = strdup(tmp + 1); | |
588 | if (!module) | |
589 | return -ENOMEM; | |
590 | tmp = strchr(module, '.'); | |
591 | if (tmp) | |
592 | *tmp = '\0'; | |
593 | tmp = (char *)module; /* For free() */ | |
594 | } | |
595 | ||
190b57fc MH |
596 | for (i = 0; i < ntevs; i++) { |
597 | tevs[i].point.module = strdup(module); | |
14a8fd7c MH |
598 | if (!tevs[i].point.module) { |
599 | ret = -ENOMEM; | |
600 | break; | |
601 | } | |
190b57fc | 602 | } |
14a8fd7c | 603 | |
f5385650 | 604 | free(tmp); |
14a8fd7c | 605 | return ret; |
190b57fc MH |
606 | } |
607 | ||
dfef99cd MH |
608 | /* Post processing the probe events */ |
609 | static int post_process_probe_trace_events(struct probe_trace_event *tevs, | |
610 | int ntevs, const char *module, | |
611 | bool uprobe) | |
612 | { | |
613 | struct ref_reloc_sym *reloc_sym; | |
614 | char *tmp; | |
5a51fcd1 | 615 | int i, skipped = 0; |
dfef99cd MH |
616 | |
617 | if (uprobe) | |
618 | return add_exec_to_probe_trace_events(tevs, ntevs, module); | |
619 | ||
620 | /* Note that currently ref_reloc_sym based probe is not for drivers */ | |
621 | if (module) | |
622 | return add_module_to_probe_trace_events(tevs, ntevs, module); | |
623 | ||
8f33f7de | 624 | reloc_sym = kernel_get_ref_reloc_sym(); |
dfef99cd MH |
625 | if (!reloc_sym) { |
626 | pr_warning("Relocated base symbol is not found!\n"); | |
627 | return -EINVAL; | |
628 | } | |
629 | ||
630 | for (i = 0; i < ntevs; i++) { | |
b031220d MH |
631 | if (!tevs[i].point.address || tevs[i].point.retprobe) |
632 | continue; | |
633 | /* If we found a wrong one, mark it by NULL symbol */ | |
634 | if (kprobe_warn_out_range(tevs[i].point.symbol, | |
635 | tevs[i].point.address)) { | |
636 | tmp = NULL; | |
637 | skipped++; | |
638 | } else { | |
639 | tmp = strdup(reloc_sym->name); | |
640 | if (!tmp) | |
641 | return -ENOMEM; | |
dfef99cd | 642 | } |
b031220d MH |
643 | /* If we have no realname, use symbol for it */ |
644 | if (!tevs[i].point.realname) | |
645 | tevs[i].point.realname = tevs[i].point.symbol; | |
646 | else | |
647 | free(tevs[i].point.symbol); | |
648 | tevs[i].point.symbol = tmp; | |
649 | tevs[i].point.offset = tevs[i].point.address - | |
650 | reloc_sym->unrelocated_addr; | |
dfef99cd | 651 | } |
5a51fcd1 | 652 | return skipped; |
dfef99cd MH |
653 | } |
654 | ||
4b4da7f7 | 655 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 656 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
ddb2f58f | 657 | struct probe_trace_event **tevs) |
4b4da7f7 MH |
658 | { |
659 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
9b118aca | 660 | struct perf_probe_point tmp; |
225466f1 | 661 | struct debuginfo *dinfo; |
190b57fc | 662 | int ntevs, ret = 0; |
4b4da7f7 | 663 | |
44225521 | 664 | dinfo = open_debuginfo(pev->target, !need_dwarf); |
ff741783 | 665 | if (!dinfo) { |
92561cb7 | 666 | if (need_dwarf) |
ff741783 | 667 | return -ENOENT; |
ff741783 | 668 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
669 | return 0; |
670 | } | |
671 | ||
dfef99cd | 672 | pr_debug("Try to find probe point from debuginfo.\n"); |
ff741783 | 673 | /* Searching trace events corresponding to a probe event */ |
ddb2f58f | 674 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs); |
ff741783 | 675 | |
9b118aca | 676 | if (ntevs == 0) { /* Not found, retry with an alternative */ |
44225521 | 677 | ret = get_alternative_probe_event(dinfo, pev, &tmp); |
9b118aca | 678 | if (!ret) { |
ddb2f58f | 679 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs); |
9b118aca MH |
680 | /* |
681 | * Write back to the original probe_event for | |
682 | * setting appropriate (user given) event name | |
683 | */ | |
684 | clear_perf_probe_point(&pev->point); | |
685 | memcpy(&pev->point, &tmp, sizeof(tmp)); | |
686 | } | |
687 | } | |
688 | ||
ff741783 | 689 | debuginfo__delete(dinfo); |
4b4da7f7 | 690 | |
146a1439 | 691 | if (ntevs > 0) { /* Succeeded to find trace events */ |
dfef99cd MH |
692 | pr_debug("Found %d probe_trace_events.\n", ntevs); |
693 | ret = post_process_probe_trace_events(*tevs, ntevs, | |
44225521 | 694 | pev->target, pev->uprobes); |
5a51fcd1 | 695 | if (ret < 0 || ret == ntevs) { |
981d05ad MH |
696 | clear_probe_trace_events(*tevs, ntevs); |
697 | zfree(tevs); | |
698 | } | |
5a51fcd1 MH |
699 | if (ret != ntevs) |
700 | return ret < 0 ? ret : ntevs; | |
701 | ntevs = 0; | |
702 | /* Fall through */ | |
146a1439 | 703 | } |
4b4da7f7 | 704 | |
146a1439 | 705 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
0687eba7 | 706 | pr_warning("Probe point '%s' not found.\n", |
146a1439 | 707 | synthesize_perf_probe_point(&pev->point)); |
0687eba7 | 708 | return -ENOENT; |
146a1439 MH |
709 | } |
710 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
711 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
712 | if (ntevs == -EBADF) { | |
713 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
714 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
715 | if (!need_dwarf) { | |
0e43e5d2 | 716 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
717 | return 0; |
718 | } | |
4b4da7f7 | 719 | } |
15eca306 | 720 | return ntevs; |
4b4da7f7 MH |
721 | } |
722 | ||
723 | #define LINEBUF_SIZE 256 | |
724 | #define NR_ADDITIONAL_LINES 2 | |
725 | ||
fde52dbd | 726 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 | 727 | { |
5f03cba4 | 728 | char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE]; |
befe3414 FBH |
729 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
730 | const char *prefix = NULL; | |
4b4da7f7 | 731 | |
befe3414 | 732 | do { |
4b4da7f7 MH |
733 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
734 | goto error; | |
befe3414 FBH |
735 | if (skip) |
736 | continue; | |
737 | if (!prefix) { | |
738 | prefix = show_num ? "%7d " : " "; | |
739 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 740 | } |
befe3414 FBH |
741 | color_fprintf(stdout, color, "%s", buf); |
742 | ||
743 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 744 | |
fde52dbd | 745 | return 1; |
4b4da7f7 | 746 | error: |
fde52dbd | 747 | if (ferror(fp)) { |
5f03cba4 MH |
748 | pr_warning("File read error: %s\n", |
749 | strerror_r(errno, sbuf, sizeof(sbuf))); | |
fde52dbd FBH |
750 | return -1; |
751 | } | |
752 | return 0; | |
753 | } | |
146a1439 | 754 | |
fde52dbd FBH |
755 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
756 | { | |
757 | int rv = __show_one_line(fp, l, skip, show_num); | |
758 | if (rv == 0) { | |
759 | pr_warning("Source file is shorter than expected.\n"); | |
760 | rv = -1; | |
761 | } | |
762 | return rv; | |
4b4da7f7 MH |
763 | } |
764 | ||
fde52dbd FBH |
765 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
766 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
767 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
768 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
769 | ||
4b4da7f7 MH |
770 | /* |
771 | * Show line-range always requires debuginfo to find source file and | |
772 | * line number. | |
773 | */ | |
811dd2ae MH |
774 | static int __show_line_range(struct line_range *lr, const char *module, |
775 | bool user) | |
4b4da7f7 | 776 | { |
d3b63d7a | 777 | int l = 1; |
5a62257a | 778 | struct int_node *ln; |
ff741783 | 779 | struct debuginfo *dinfo; |
4b4da7f7 | 780 | FILE *fp; |
ff741783 | 781 | int ret; |
7cf0b79e | 782 | char *tmp; |
5f03cba4 | 783 | char sbuf[STRERR_BUFSIZE]; |
4b4da7f7 MH |
784 | |
785 | /* Search a line range */ | |
92561cb7 MH |
786 | dinfo = open_debuginfo(module, false); |
787 | if (!dinfo) | |
ff741783 | 788 | return -ENOENT; |
146a1439 | 789 | |
ff741783 | 790 | ret = debuginfo__find_line_range(dinfo, lr); |
811dd2ae MH |
791 | if (!ret) { /* Not found, retry with an alternative */ |
792 | ret = get_alternative_line_range(dinfo, lr, module, user); | |
793 | if (!ret) | |
794 | ret = debuginfo__find_line_range(dinfo, lr); | |
795 | } | |
ff741783 | 796 | debuginfo__delete(dinfo); |
5ee05b88 | 797 | if (ret == 0 || ret == -ENOENT) { |
146a1439 MH |
798 | pr_warning("Specified source line is not found.\n"); |
799 | return -ENOENT; | |
800 | } else if (ret < 0) { | |
5ee05b88 | 801 | pr_warning("Debuginfo analysis failed.\n"); |
146a1439 MH |
802 | return ret; |
803 | } | |
4b4da7f7 | 804 | |
7cf0b79e MH |
805 | /* Convert source file path */ |
806 | tmp = lr->path; | |
6a330a3c | 807 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
a78604de HK |
808 | |
809 | /* Free old path when new path is assigned */ | |
810 | if (tmp != lr->path) | |
811 | free(tmp); | |
812 | ||
7cf0b79e | 813 | if (ret < 0) { |
5ee05b88 | 814 | pr_warning("Failed to find source file path.\n"); |
7cf0b79e MH |
815 | return ret; |
816 | } | |
817 | ||
4b4da7f7 MH |
818 | setup_pager(); |
819 | ||
820 | if (lr->function) | |
8737ebde | 821 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
822 | lr->start - lr->offset); |
823 | else | |
62c15fc4 | 824 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
825 | |
826 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
827 | if (fp == NULL) { |
828 | pr_warning("Failed to open %s: %s\n", lr->path, | |
5f03cba4 | 829 | strerror_r(errno, sbuf, sizeof(sbuf))); |
146a1439 MH |
830 | return -errno; |
831 | } | |
4b4da7f7 | 832 | /* Skip to starting line number */ |
44b81e92 | 833 | while (l < lr->start) { |
fde52dbd | 834 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
835 | if (ret < 0) |
836 | goto end; | |
837 | } | |
4b4da7f7 | 838 | |
5a62257a MH |
839 | intlist__for_each(ln, lr->line_list) { |
840 | for (; ln->i > l; l++) { | |
fde52dbd | 841 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
842 | if (ret < 0) |
843 | goto end; | |
844 | } | |
fde52dbd | 845 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
846 | if (ret < 0) |
847 | goto end; | |
4b4da7f7 MH |
848 | } |
849 | ||
850 | if (lr->end == INT_MAX) | |
851 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
852 | while (l <= lr->end) { |
853 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
854 | if (ret <= 0) | |
44b81e92 FBH |
855 | break; |
856 | } | |
146a1439 | 857 | end: |
4b4da7f7 | 858 | fclose(fp); |
146a1439 | 859 | return ret; |
4b4da7f7 MH |
860 | } |
861 | ||
2b394bc4 | 862 | int show_line_range(struct line_range *lr, const char *module, bool user) |
ee45b6c2 MH |
863 | { |
864 | int ret; | |
865 | ||
2b394bc4 | 866 | ret = init_symbol_maps(user); |
ee45b6c2 MH |
867 | if (ret < 0) |
868 | return ret; | |
811dd2ae | 869 | ret = __show_line_range(lr, module, user); |
ee45b6c2 MH |
870 | exit_symbol_maps(); |
871 | ||
872 | return ret; | |
873 | } | |
874 | ||
ff741783 MH |
875 | static int show_available_vars_at(struct debuginfo *dinfo, |
876 | struct perf_probe_event *pev, | |
ddb2f58f | 877 | struct strfilter *_filter) |
cf6eb489 MH |
878 | { |
879 | char *buf; | |
bd09d7b5 | 880 | int ret, i, nvars; |
cf6eb489 MH |
881 | struct str_node *node; |
882 | struct variable_list *vls = NULL, *vl; | |
9b118aca | 883 | struct perf_probe_point tmp; |
bd09d7b5 | 884 | const char *var; |
cf6eb489 MH |
885 | |
886 | buf = synthesize_perf_probe_point(&pev->point); | |
887 | if (!buf) | |
888 | return -EINVAL; | |
889 | pr_debug("Searching variables at %s\n", buf); | |
890 | ||
ddb2f58f | 891 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls); |
9b118aca | 892 | if (!ret) { /* Not found, retry with an alternative */ |
44225521 | 893 | ret = get_alternative_probe_event(dinfo, pev, &tmp); |
9b118aca MH |
894 | if (!ret) { |
895 | ret = debuginfo__find_available_vars_at(dinfo, pev, | |
ddb2f58f | 896 | &vls); |
9b118aca MH |
897 | /* Release the old probe_point */ |
898 | clear_perf_probe_point(&tmp); | |
899 | } | |
900 | } | |
bd09d7b5 | 901 | if (ret <= 0) { |
69e96eaa MH |
902 | if (ret == 0 || ret == -ENOENT) { |
903 | pr_err("Failed to find the address of %s\n", buf); | |
904 | ret = -ENOENT; | |
905 | } else | |
906 | pr_warning("Debuginfo analysis failed.\n"); | |
bd09d7b5 MH |
907 | goto end; |
908 | } | |
69e96eaa | 909 | |
bd09d7b5 MH |
910 | /* Some variables are found */ |
911 | fprintf(stdout, "Available variables at %s\n", buf); | |
912 | for (i = 0; i < ret; i++) { | |
913 | vl = &vls[i]; | |
914 | /* | |
915 | * A probe point might be converted to | |
916 | * several trace points. | |
917 | */ | |
918 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
919 | vl->point.offset); | |
74cf249d | 920 | zfree(&vl->point.symbol); |
bd09d7b5 MH |
921 | nvars = 0; |
922 | if (vl->vars) { | |
923 | strlist__for_each(node, vl->vars) { | |
924 | var = strchr(node->s, '\t') + 1; | |
925 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 926 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
927 | nvars++; |
928 | } | |
929 | } | |
930 | strlist__delete(vl->vars); | |
cf6eb489 | 931 | } |
bd09d7b5 MH |
932 | if (nvars == 0) |
933 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
934 | } | |
935 | free(vls); | |
936 | end: | |
cf6eb489 MH |
937 | free(buf); |
938 | return ret; | |
939 | } | |
940 | ||
941 | /* Show available variables on given probe point */ | |
942 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
ddb2f58f | 943 | struct strfilter *_filter) |
cf6eb489 | 944 | { |
ff741783 MH |
945 | int i, ret = 0; |
946 | struct debuginfo *dinfo; | |
cf6eb489 | 947 | |
2b394bc4 | 948 | ret = init_symbol_maps(pevs->uprobes); |
cf6eb489 MH |
949 | if (ret < 0) |
950 | return ret; | |
951 | ||
44225521 | 952 | dinfo = open_debuginfo(pevs->target, false); |
ff741783 | 953 | if (!dinfo) { |
ee45b6c2 MH |
954 | ret = -ENOENT; |
955 | goto out; | |
ff741783 MH |
956 | } |
957 | ||
cf6eb489 MH |
958 | setup_pager(); |
959 | ||
ff741783 | 960 | for (i = 0; i < npevs && ret >= 0; i++) |
ddb2f58f | 961 | ret = show_available_vars_at(dinfo, &pevs[i], _filter); |
ff741783 MH |
962 | |
963 | debuginfo__delete(dinfo); | |
ee45b6c2 MH |
964 | out: |
965 | exit_symbol_maps(); | |
cf6eb489 MH |
966 | return ret; |
967 | } | |
968 | ||
89fe808a | 969 | #else /* !HAVE_DWARF_SUPPORT */ |
4b4da7f7 | 970 | |
7737af01 MH |
971 | static void debuginfo_cache__exit(void) |
972 | { | |
973 | } | |
974 | ||
5a6f6314 MH |
975 | static int |
976 | find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused, | |
977 | struct perf_probe_point *pp __maybe_unused, | |
978 | bool is_kprobe __maybe_unused) | |
4b4da7f7 | 979 | { |
5a6f6314 | 980 | return -ENOSYS; |
4b4da7f7 MH |
981 | } |
982 | ||
0e60836b | 983 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
ddb2f58f | 984 | struct probe_trace_event **tevs __maybe_unused) |
4b4da7f7 | 985 | { |
146a1439 MH |
986 | if (perf_probe_event_need_dwarf(pev)) { |
987 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
988 | return -ENOSYS; | |
989 | } | |
225466f1 | 990 | |
4b4da7f7 MH |
991 | return 0; |
992 | } | |
993 | ||
1d037ca1 | 994 | int show_line_range(struct line_range *lr __maybe_unused, |
2b394bc4 MH |
995 | const char *module __maybe_unused, |
996 | bool user __maybe_unused) | |
4b4da7f7 | 997 | { |
146a1439 MH |
998 | pr_warning("Debuginfo-analysis is not supported.\n"); |
999 | return -ENOSYS; | |
4b4da7f7 MH |
1000 | } |
1001 | ||
1d037ca1 | 1002 | int show_available_vars(struct perf_probe_event *pevs __maybe_unused, |
ddb2f58f MH |
1003 | int npevs __maybe_unused, |
1004 | struct strfilter *filter __maybe_unused) | |
cf6eb489 MH |
1005 | { |
1006 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
1007 | return -ENOSYS; | |
1008 | } | |
e0faa8d3 MH |
1009 | #endif |
1010 | ||
e53b00d3 MH |
1011 | void line_range__clear(struct line_range *lr) |
1012 | { | |
e53b00d3 MH |
1013 | free(lr->function); |
1014 | free(lr->file); | |
1015 | free(lr->path); | |
1016 | free(lr->comp_dir); | |
5a62257a | 1017 | intlist__delete(lr->line_list); |
e53b00d3 MH |
1018 | memset(lr, 0, sizeof(*lr)); |
1019 | } | |
1020 | ||
5a62257a | 1021 | int line_range__init(struct line_range *lr) |
e53b00d3 MH |
1022 | { |
1023 | memset(lr, 0, sizeof(*lr)); | |
5a62257a MH |
1024 | lr->line_list = intlist__new(NULL); |
1025 | if (!lr->line_list) | |
1026 | return -ENOMEM; | |
1027 | else | |
1028 | return 0; | |
e53b00d3 MH |
1029 | } |
1030 | ||
21dd9ae5 FBH |
1031 | static int parse_line_num(char **ptr, int *val, const char *what) |
1032 | { | |
1033 | const char *start = *ptr; | |
1034 | ||
1035 | errno = 0; | |
1036 | *val = strtol(*ptr, ptr, 0); | |
1037 | if (errno || *ptr == start) { | |
1038 | semantic_error("'%s' is not a valid number.\n", what); | |
1039 | return -EINVAL; | |
1040 | } | |
1041 | return 0; | |
1042 | } | |
1043 | ||
573709fd MH |
1044 | /* Check the name is good for event, group or function */ |
1045 | static bool is_c_func_name(const char *name) | |
1046 | { | |
1047 | if (!isalpha(*name) && *name != '_') | |
1048 | return false; | |
1049 | while (*++name != '\0') { | |
1050 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
1051 | return false; | |
1052 | } | |
1053 | return true; | |
1054 | } | |
1055 | ||
9d95b580 FBH |
1056 | /* |
1057 | * Stuff 'lr' according to the line range described by 'arg'. | |
1058 | * The line range syntax is described by: | |
1059 | * | |
1060 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 1061 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 1062 | */ |
146a1439 | 1063 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 1064 | { |
e116dfa1 | 1065 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
1066 | int err; |
1067 | ||
1068 | if (!name) | |
1069 | return -ENOMEM; | |
1070 | ||
1071 | lr->start = 0; | |
1072 | lr->end = INT_MAX; | |
1073 | ||
1074 | range = strchr(name, ':'); | |
1075 | if (range) { | |
1076 | *range++ = '\0'; | |
1077 | ||
1078 | err = parse_line_num(&range, &lr->start, "start line"); | |
1079 | if (err) | |
1080 | goto err; | |
1081 | ||
1082 | if (*range == '+' || *range == '-') { | |
1083 | const char c = *range++; | |
1084 | ||
1085 | err = parse_line_num(&range, &lr->end, "end line"); | |
1086 | if (err) | |
1087 | goto err; | |
1088 | ||
1089 | if (c == '+') { | |
1090 | lr->end += lr->start; | |
1091 | /* | |
1092 | * Adjust the number of lines here. | |
1093 | * If the number of lines == 1, the | |
1094 | * the end of line should be equal to | |
1095 | * the start of line. | |
1096 | */ | |
1097 | lr->end--; | |
1098 | } | |
1099 | } | |
9d95b580 | 1100 | |
d3b63d7a | 1101 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
1102 | |
1103 | err = -EINVAL; | |
d3b63d7a | 1104 | if (lr->start > lr->end) { |
631c9def | 1105 | semantic_error("Start line must be smaller" |
146a1439 | 1106 | " than end line.\n"); |
21dd9ae5 | 1107 | goto err; |
146a1439 | 1108 | } |
21dd9ae5 FBH |
1109 | if (*range != '\0') { |
1110 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
1111 | goto err; | |
146a1439 | 1112 | } |
d3b63d7a | 1113 | } |
02b95dad | 1114 | |
e116dfa1 MH |
1115 | file = strchr(name, '@'); |
1116 | if (file) { | |
1117 | *file = '\0'; | |
1118 | lr->file = strdup(++file); | |
1119 | if (lr->file == NULL) { | |
1120 | err = -ENOMEM; | |
1121 | goto err; | |
1122 | } | |
1123 | lr->function = name; | |
573709fd | 1124 | } else if (strchr(name, '/') || strchr(name, '.')) |
21dd9ae5 | 1125 | lr->file = name; |
573709fd | 1126 | else if (is_c_func_name(name))/* We reuse it for checking funcname */ |
21dd9ae5 | 1127 | lr->function = name; |
573709fd MH |
1128 | else { /* Invalid name */ |
1129 | semantic_error("'%s' is not a valid function name.\n", name); | |
1130 | err = -EINVAL; | |
1131 | goto err; | |
1132 | } | |
146a1439 MH |
1133 | |
1134 | return 0; | |
21dd9ae5 FBH |
1135 | err: |
1136 | free(name); | |
1137 | return err; | |
631c9def MH |
1138 | } |
1139 | ||
50656eec | 1140 | /* Parse probepoint definition. */ |
146a1439 | 1141 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 1142 | { |
4235b045 | 1143 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
1144 | char *ptr, *tmp; |
1145 | char c, nc = 0; | |
3099c026 | 1146 | bool file_spec = false; |
50656eec MH |
1147 | /* |
1148 | * <Syntax> | |
2a9c8c36 MH |
1149 | * perf probe [EVENT=]SRC[:LN|;PTN] |
1150 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
1151 | * |
1152 | * TODO:Group name support | |
50656eec | 1153 | */ |
e59d29e8 WN |
1154 | if (!arg) |
1155 | return -EINVAL; | |
50656eec | 1156 | |
2a9c8c36 MH |
1157 | ptr = strpbrk(arg, ";=@+%"); |
1158 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
1159 | *ptr = '\0'; |
1160 | tmp = ptr + 1; | |
146a1439 MH |
1161 | if (strchr(arg, ':')) { |
1162 | semantic_error("Group name is not supported yet.\n"); | |
1163 | return -ENOTSUP; | |
1164 | } | |
573709fd | 1165 | if (!is_c_func_name(arg)) { |
b7702a21 | 1166 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
1167 | "follow C symbol-naming rule.\n", arg); |
1168 | return -EINVAL; | |
1169 | } | |
02b95dad MH |
1170 | pev->event = strdup(arg); |
1171 | if (pev->event == NULL) | |
1172 | return -ENOMEM; | |
4235b045 | 1173 | pev->group = NULL; |
af663d75 MH |
1174 | arg = tmp; |
1175 | } | |
1176 | ||
3099c026 NR |
1177 | /* |
1178 | * Check arg is function or file name and copy it. | |
1179 | * | |
1180 | * We consider arg to be a file spec if and only if it satisfies | |
1181 | * all of the below criteria:: | |
1182 | * - it does not include any of "+@%", | |
1183 | * - it includes one of ":;", and | |
1184 | * - it has a period '.' in the name. | |
1185 | * | |
1186 | * Otherwise, we consider arg to be a function specification. | |
1187 | */ | |
1188 | if (!strpbrk(arg, "+@%") && (ptr = strpbrk(arg, ";:")) != NULL) { | |
1189 | /* This is a file spec if it includes a '.' before ; or : */ | |
1190 | if (memchr(arg, '.', ptr - arg)) | |
1191 | file_spec = true; | |
1192 | } | |
1193 | ||
2a9c8c36 | 1194 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
1195 | if (ptr) { |
1196 | nc = *ptr; | |
1197 | *ptr++ = '\0'; | |
1198 | } | |
1199 | ||
02b95dad MH |
1200 | tmp = strdup(arg); |
1201 | if (tmp == NULL) | |
1202 | return -ENOMEM; | |
1203 | ||
3099c026 | 1204 | if (file_spec) |
02b95dad | 1205 | pp->file = tmp; |
3099c026 | 1206 | else |
02b95dad | 1207 | pp->function = tmp; |
50656eec MH |
1208 | |
1209 | /* Parse other options */ | |
1210 | while (ptr) { | |
1211 | arg = ptr; | |
1212 | c = nc; | |
2a9c8c36 | 1213 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
1214 | pp->lazy_line = strdup(arg); |
1215 | if (pp->lazy_line == NULL) | |
1216 | return -ENOMEM; | |
2a9c8c36 MH |
1217 | break; |
1218 | } | |
1219 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
1220 | if (ptr) { |
1221 | nc = *ptr; | |
1222 | *ptr++ = '\0'; | |
1223 | } | |
1224 | switch (c) { | |
1225 | case ':': /* Line number */ | |
1226 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 1227 | if (*tmp != '\0') { |
2a9c8c36 | 1228 | semantic_error("There is non-digit char" |
146a1439 MH |
1229 | " in line number.\n"); |
1230 | return -EINVAL; | |
1231 | } | |
50656eec MH |
1232 | break; |
1233 | case '+': /* Byte offset from a symbol */ | |
1234 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 1235 | if (*tmp != '\0') { |
2a9c8c36 | 1236 | semantic_error("There is non-digit character" |
146a1439 MH |
1237 | " in offset.\n"); |
1238 | return -EINVAL; | |
1239 | } | |
50656eec MH |
1240 | break; |
1241 | case '@': /* File name */ | |
146a1439 MH |
1242 | if (pp->file) { |
1243 | semantic_error("SRC@SRC is not allowed.\n"); | |
1244 | return -EINVAL; | |
1245 | } | |
02b95dad MH |
1246 | pp->file = strdup(arg); |
1247 | if (pp->file == NULL) | |
1248 | return -ENOMEM; | |
50656eec MH |
1249 | break; |
1250 | case '%': /* Probe places */ | |
1251 | if (strcmp(arg, "return") == 0) { | |
1252 | pp->retprobe = 1; | |
146a1439 MH |
1253 | } else { /* Others not supported yet */ |
1254 | semantic_error("%%%s is not supported.\n", arg); | |
1255 | return -ENOTSUP; | |
1256 | } | |
50656eec | 1257 | break; |
146a1439 MH |
1258 | default: /* Buggy case */ |
1259 | pr_err("This program has a bug at %s:%d.\n", | |
1260 | __FILE__, __LINE__); | |
1261 | return -ENOTSUP; | |
50656eec MH |
1262 | break; |
1263 | } | |
1264 | } | |
1265 | ||
1266 | /* Exclusion check */ | |
146a1439 | 1267 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
1268 | semantic_error("Lazy pattern can't be used with" |
1269 | " line number.\n"); | |
146a1439 MH |
1270 | return -EINVAL; |
1271 | } | |
2a9c8c36 | 1272 | |
146a1439 | 1273 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 1274 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
1275 | return -EINVAL; |
1276 | } | |
2a9c8c36 | 1277 | |
146a1439 | 1278 | if (pp->line && pp->offset) { |
0e43e5d2 | 1279 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
1280 | return -EINVAL; |
1281 | } | |
50656eec | 1282 | |
146a1439 | 1283 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 1284 | semantic_error("File always requires line number or " |
0e43e5d2 | 1285 | "lazy pattern.\n"); |
146a1439 MH |
1286 | return -EINVAL; |
1287 | } | |
50656eec | 1288 | |
146a1439 | 1289 | if (pp->offset && !pp->function) { |
0e43e5d2 | 1290 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
1291 | return -EINVAL; |
1292 | } | |
50656eec | 1293 | |
146a1439 | 1294 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 1295 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
1296 | return -EINVAL; |
1297 | } | |
50656eec | 1298 | |
146a1439 | 1299 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 1300 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 1301 | "return probe.\n"); |
146a1439 MH |
1302 | return -EINVAL; |
1303 | } | |
50656eec | 1304 | |
4235b045 | 1305 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
1306 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
1307 | pp->lazy_line); | |
146a1439 | 1308 | return 0; |
50656eec MH |
1309 | } |
1310 | ||
7df2f329 | 1311 | /* Parse perf-probe event argument */ |
146a1439 | 1312 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 1313 | { |
b2a3c12b | 1314 | char *tmp, *goodname; |
7df2f329 MH |
1315 | struct perf_probe_arg_field **fieldp; |
1316 | ||
1317 | pr_debug("parsing arg: %s into ", str); | |
1318 | ||
48481938 MH |
1319 | tmp = strchr(str, '='); |
1320 | if (tmp) { | |
02b95dad MH |
1321 | arg->name = strndup(str, tmp - str); |
1322 | if (arg->name == NULL) | |
1323 | return -ENOMEM; | |
11a1ca35 | 1324 | pr_debug("name:%s ", arg->name); |
48481938 MH |
1325 | str = tmp + 1; |
1326 | } | |
1327 | ||
11a1ca35 MH |
1328 | tmp = strchr(str, ':'); |
1329 | if (tmp) { /* Type setting */ | |
1330 | *tmp = '\0'; | |
02b95dad MH |
1331 | arg->type = strdup(tmp + 1); |
1332 | if (arg->type == NULL) | |
1333 | return -ENOMEM; | |
11a1ca35 MH |
1334 | pr_debug("type:%s ", arg->type); |
1335 | } | |
1336 | ||
b2a3c12b | 1337 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
1338 | if (!is_c_varname(str) || !tmp) { |
1339 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
1340 | arg->var = strdup(str); |
1341 | if (arg->var == NULL) | |
1342 | return -ENOMEM; | |
48481938 | 1343 | pr_debug("%s\n", arg->var); |
146a1439 | 1344 | return 0; |
7df2f329 MH |
1345 | } |
1346 | ||
b2a3c12b | 1347 | /* Structure fields or array element */ |
02b95dad MH |
1348 | arg->var = strndup(str, tmp - str); |
1349 | if (arg->var == NULL) | |
1350 | return -ENOMEM; | |
b2a3c12b | 1351 | goodname = arg->var; |
48481938 | 1352 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
1353 | fieldp = &arg->field; |
1354 | ||
1355 | do { | |
e334016f MH |
1356 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
1357 | if (*fieldp == NULL) | |
1358 | return -ENOMEM; | |
b2a3c12b MH |
1359 | if (*tmp == '[') { /* Array */ |
1360 | str = tmp; | |
1361 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 1362 | (*fieldp)->ref = true; |
b2a3c12b MH |
1363 | if (*tmp != ']' || tmp == str + 1) { |
1364 | semantic_error("Array index must be a" | |
1365 | " number.\n"); | |
1366 | return -EINVAL; | |
1367 | } | |
1368 | tmp++; | |
1369 | if (*tmp == '\0') | |
1370 | tmp = NULL; | |
1371 | } else { /* Structure */ | |
1372 | if (*tmp == '.') { | |
1373 | str = tmp + 1; | |
1374 | (*fieldp)->ref = false; | |
1375 | } else if (tmp[1] == '>') { | |
1376 | str = tmp + 2; | |
1377 | (*fieldp)->ref = true; | |
1378 | } else { | |
1379 | semantic_error("Argument parse error: %s\n", | |
1380 | str); | |
1381 | return -EINVAL; | |
1382 | } | |
1383 | tmp = strpbrk(str, "-.["); | |
146a1439 | 1384 | } |
7df2f329 | 1385 | if (tmp) { |
02b95dad MH |
1386 | (*fieldp)->name = strndup(str, tmp - str); |
1387 | if ((*fieldp)->name == NULL) | |
1388 | return -ENOMEM; | |
b2a3c12b MH |
1389 | if (*str != '[') |
1390 | goodname = (*fieldp)->name; | |
7df2f329 MH |
1391 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
1392 | fieldp = &(*fieldp)->next; | |
1393 | } | |
1394 | } while (tmp); | |
02b95dad MH |
1395 | (*fieldp)->name = strdup(str); |
1396 | if ((*fieldp)->name == NULL) | |
1397 | return -ENOMEM; | |
b2a3c12b MH |
1398 | if (*str != '[') |
1399 | goodname = (*fieldp)->name; | |
7df2f329 | 1400 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 1401 | |
b2a3c12b | 1402 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 1403 | if (!arg->name) { |
b2a3c12b | 1404 | arg->name = strdup(goodname); |
02b95dad MH |
1405 | if (arg->name == NULL) |
1406 | return -ENOMEM; | |
1407 | } | |
146a1439 | 1408 | return 0; |
7df2f329 MH |
1409 | } |
1410 | ||
4235b045 | 1411 | /* Parse perf-probe event command */ |
146a1439 | 1412 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1413 | { |
e1c01d61 | 1414 | char **argv; |
146a1439 | 1415 | int argc, i, ret = 0; |
fac13fd5 | 1416 | |
4235b045 | 1417 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1418 | if (!argv) { |
1419 | pr_debug("Failed to split arguments.\n"); | |
1420 | return -ENOMEM; | |
1421 | } | |
1422 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1423 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1424 | ret = -ERANGE; | |
1425 | goto out; | |
1426 | } | |
50656eec | 1427 | /* Parse probe point */ |
146a1439 MH |
1428 | ret = parse_perf_probe_point(argv[0], pev); |
1429 | if (ret < 0) | |
1430 | goto out; | |
50656eec | 1431 | |
e1c01d61 | 1432 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1433 | pev->nargs = argc - 1; |
e334016f MH |
1434 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1435 | if (pev->args == NULL) { | |
1436 | ret = -ENOMEM; | |
1437 | goto out; | |
1438 | } | |
146a1439 MH |
1439 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1440 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1441 | if (ret >= 0 && | |
1442 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1443 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1444 | " kretprobe.\n"); |
1445 | ret = -EINVAL; | |
1446 | } | |
e1c01d61 | 1447 | } |
146a1439 | 1448 | out: |
e1c01d61 | 1449 | argv_free(argv); |
146a1439 MH |
1450 | |
1451 | return ret; | |
50656eec MH |
1452 | } |
1453 | ||
4235b045 MH |
1454 | /* Return true if this perf_probe_event requires debuginfo */ |
1455 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1456 | { | |
1457 | int i; | |
1458 | ||
1459 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
1460 | return true; | |
1461 | ||
1462 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 1463 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
1464 | return true; |
1465 | ||
1466 | return false; | |
1467 | } | |
1468 | ||
0e60836b SD |
1469 | /* Parse probe_events event into struct probe_point */ |
1470 | static int parse_probe_trace_command(const char *cmd, | |
190b57fc | 1471 | struct probe_trace_event *tev) |
4de189fe | 1472 | { |
0e60836b | 1473 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1474 | char pr; |
1475 | char *p; | |
bcbd0040 | 1476 | char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str; |
4de189fe MH |
1477 | int ret, i, argc; |
1478 | char **argv; | |
1479 | ||
0e60836b | 1480 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1481 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1482 | if (!argv) { |
1483 | pr_debug("Failed to split arguments.\n"); | |
1484 | return -ENOMEM; | |
1485 | } | |
1486 | if (argc < 2) { | |
1487 | semantic_error("Too few probe arguments.\n"); | |
1488 | ret = -ERANGE; | |
1489 | goto out; | |
1490 | } | |
4de189fe MH |
1491 | |
1492 | /* Scan event and group name. */ | |
bcbd0040 IT |
1493 | argv0_str = strdup(argv[0]); |
1494 | if (argv0_str == NULL) { | |
1495 | ret = -ENOMEM; | |
1496 | goto out; | |
1497 | } | |
1498 | fmt1_str = strtok_r(argv0_str, ":", &fmt); | |
1499 | fmt2_str = strtok_r(NULL, "/", &fmt); | |
1500 | fmt3_str = strtok_r(NULL, " \t", &fmt); | |
1501 | if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL | |
1502 | || fmt3_str == NULL) { | |
146a1439 MH |
1503 | semantic_error("Failed to parse event name: %s\n", argv[0]); |
1504 | ret = -EINVAL; | |
1505 | goto out; | |
1506 | } | |
bcbd0040 IT |
1507 | pr = fmt1_str[0]; |
1508 | tev->group = strdup(fmt2_str); | |
1509 | tev->event = strdup(fmt3_str); | |
1510 | if (tev->group == NULL || tev->event == NULL) { | |
1511 | ret = -ENOMEM; | |
1512 | goto out; | |
1513 | } | |
4235b045 | 1514 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1515 | |
4235b045 | 1516 | tp->retprobe = (pr == 'r'); |
4de189fe | 1517 | |
190b57fc MH |
1518 | /* Scan module name(if there), function name and offset */ |
1519 | p = strchr(argv[1], ':'); | |
1520 | if (p) { | |
1521 | tp->module = strndup(argv[1], p - argv[1]); | |
1522 | p++; | |
1523 | } else | |
1524 | p = argv[1]; | |
bcbd0040 | 1525 | fmt1_str = strtok_r(p, "+", &fmt); |
5a6f6314 MH |
1526 | if (fmt1_str[0] == '0') /* only the address started with 0x */ |
1527 | tp->address = strtoul(fmt1_str, NULL, 0); | |
1528 | else { | |
1529 | /* Only the symbol-based probe has offset */ | |
1530 | tp->symbol = strdup(fmt1_str); | |
1531 | if (tp->symbol == NULL) { | |
1532 | ret = -ENOMEM; | |
1533 | goto out; | |
1534 | } | |
1535 | fmt2_str = strtok_r(NULL, "", &fmt); | |
1536 | if (fmt2_str == NULL) | |
1537 | tp->offset = 0; | |
1538 | else | |
1539 | tp->offset = strtoul(fmt2_str, NULL, 10); | |
bcbd0040 | 1540 | } |
4de189fe | 1541 | |
4235b045 | 1542 | tev->nargs = argc - 2; |
0e60836b | 1543 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1544 | if (tev->args == NULL) { |
1545 | ret = -ENOMEM; | |
1546 | goto out; | |
1547 | } | |
4235b045 | 1548 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1549 | p = strchr(argv[i + 2], '='); |
1550 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1551 | *p++ = '\0'; |
1552 | else | |
1553 | p = argv[i + 2]; | |
02b95dad | 1554 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1555 | /* TODO: parse regs and offset */ |
02b95dad MH |
1556 | tev->args[i].value = strdup(p); |
1557 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1558 | ret = -ENOMEM; | |
1559 | goto out; | |
1560 | } | |
4de189fe | 1561 | } |
146a1439 MH |
1562 | ret = 0; |
1563 | out: | |
bcbd0040 | 1564 | free(argv0_str); |
4de189fe | 1565 | argv_free(argv); |
146a1439 | 1566 | return ret; |
4de189fe MH |
1567 | } |
1568 | ||
7df2f329 MH |
1569 | /* Compose only probe arg */ |
1570 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
1571 | { | |
1572 | struct perf_probe_arg_field *field = pa->field; | |
1573 | int ret; | |
1574 | char *tmp = buf; | |
1575 | ||
48481938 MH |
1576 | if (pa->name && pa->var) |
1577 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
1578 | else | |
1579 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
1580 | if (ret <= 0) |
1581 | goto error; | |
1582 | tmp += ret; | |
1583 | len -= ret; | |
1584 | ||
1585 | while (field) { | |
b2a3c12b MH |
1586 | if (field->name[0] == '[') |
1587 | ret = e_snprintf(tmp, len, "%s", field->name); | |
1588 | else | |
1589 | ret = e_snprintf(tmp, len, "%s%s", | |
1590 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
1591 | if (ret <= 0) |
1592 | goto error; | |
1593 | tmp += ret; | |
1594 | len -= ret; | |
1595 | field = field->next; | |
1596 | } | |
11a1ca35 MH |
1597 | |
1598 | if (pa->type) { | |
1599 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
1600 | if (ret <= 0) | |
1601 | goto error; | |
1602 | tmp += ret; | |
1603 | len -= ret; | |
1604 | } | |
1605 | ||
7df2f329 MH |
1606 | return tmp - buf; |
1607 | error: | |
5f03cba4 | 1608 | pr_debug("Failed to synthesize perf probe argument: %d\n", ret); |
146a1439 | 1609 | return ret; |
7df2f329 MH |
1610 | } |
1611 | ||
4235b045 MH |
1612 | /* Compose only probe point (not argument) */ |
1613 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1614 | { |
fb1587d8 MH |
1615 | char *buf, *tmp; |
1616 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1617 | int ret, len; | |
4de189fe | 1618 | |
e334016f MH |
1619 | buf = zalloc(MAX_CMDLEN); |
1620 | if (buf == NULL) { | |
1621 | ret = -ENOMEM; | |
1622 | goto error; | |
1623 | } | |
4de189fe | 1624 | if (pp->offset) { |
fb1587d8 | 1625 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1626 | if (ret <= 0) |
1627 | goto error; | |
1628 | } | |
1629 | if (pp->line) { | |
fb1587d8 MH |
1630 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1631 | if (ret <= 0) | |
1632 | goto error; | |
1633 | } | |
1634 | if (pp->file) { | |
32ae2ade FBH |
1635 | tmp = pp->file; |
1636 | len = strlen(tmp); | |
1637 | if (len > 30) { | |
1638 | tmp = strchr(pp->file + len - 30, '/'); | |
1639 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1640 | } | |
1641 | ret = e_snprintf(file, 32, "@%s", tmp); | |
4de189fe MH |
1642 | if (ret <= 0) |
1643 | goto error; | |
1644 | } | |
1645 | ||
1646 | if (pp->function) | |
fb1587d8 MH |
1647 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1648 | offs, pp->retprobe ? "%return" : "", line, | |
1649 | file); | |
4de189fe | 1650 | else |
fb1587d8 | 1651 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1652 | if (ret <= 0) |
1653 | goto error; | |
1654 | ||
1655 | return buf; | |
7ef17aaf | 1656 | error: |
5f03cba4 | 1657 | pr_debug("Failed to synthesize perf probe point: %d\n", ret); |
f5385650 | 1658 | free(buf); |
146a1439 | 1659 | return NULL; |
7ef17aaf MH |
1660 | } |
1661 | ||
4235b045 MH |
1662 | #if 0 |
1663 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1664 | { |
1665 | char *buf; | |
1666 | int i, len, ret; | |
1667 | ||
4235b045 MH |
1668 | buf = synthesize_perf_probe_point(&pev->point); |
1669 | if (!buf) | |
1670 | return NULL; | |
4de189fe | 1671 | |
4235b045 MH |
1672 | len = strlen(buf); |
1673 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1674 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1675 | pev->args[i].name); |
1676 | if (ret <= 0) { | |
1677 | free(buf); | |
1678 | return NULL; | |
1679 | } | |
4de189fe MH |
1680 | len += ret; |
1681 | } | |
4de189fe | 1682 | |
4235b045 MH |
1683 | return buf; |
1684 | } | |
1685 | #endif | |
1686 | ||
0e60836b | 1687 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1688 | char **buf, size_t *buflen, |
1689 | int depth) | |
1690 | { | |
1691 | int ret; | |
1692 | if (ref->next) { | |
0e60836b | 1693 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1694 | buflen, depth + 1); |
1695 | if (depth < 0) | |
1696 | goto out; | |
1697 | } | |
1698 | ||
1699 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1700 | if (ret < 0) | |
1701 | depth = ret; | |
1702 | else { | |
1703 | *buf += ret; | |
1704 | *buflen -= ret; | |
1705 | } | |
1706 | out: | |
1707 | return depth; | |
4de189fe | 1708 | |
4de189fe MH |
1709 | } |
1710 | ||
0e60836b | 1711 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1712 | char *buf, size_t buflen) |
50656eec | 1713 | { |
0e60836b | 1714 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1715 | int ret, depth = 0; |
1716 | char *tmp = buf; | |
1717 | ||
1718 | /* Argument name or separator */ | |
1719 | if (arg->name) | |
1720 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1721 | else | |
1722 | ret = e_snprintf(buf, buflen, " "); | |
1723 | if (ret < 0) | |
1724 | return ret; | |
1725 | buf += ret; | |
1726 | buflen -= ret; | |
1727 | ||
b7dcb857 MH |
1728 | /* Special case: @XXX */ |
1729 | if (arg->value[0] == '@' && arg->ref) | |
1730 | ref = ref->next; | |
1731 | ||
4235b045 | 1732 | /* Dereferencing arguments */ |
b7dcb857 | 1733 | if (ref) { |
0e60836b | 1734 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1735 | &buflen, 1); |
1736 | if (depth < 0) | |
1737 | return depth; | |
1738 | } | |
1739 | ||
1740 | /* Print argument value */ | |
b7dcb857 MH |
1741 | if (arg->value[0] == '@' && arg->ref) |
1742 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1743 | arg->ref->offset); | |
1744 | else | |
1745 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1746 | if (ret < 0) |
1747 | return ret; | |
1748 | buf += ret; | |
1749 | buflen -= ret; | |
1750 | ||
1751 | /* Closing */ | |
1752 | while (depth--) { | |
1753 | ret = e_snprintf(buf, buflen, ")"); | |
1754 | if (ret < 0) | |
1755 | return ret; | |
1756 | buf += ret; | |
1757 | buflen -= ret; | |
1758 | } | |
4984912e MH |
1759 | /* Print argument type */ |
1760 | if (arg->type) { | |
1761 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1762 | if (ret <= 0) | |
1763 | return ret; | |
1764 | buf += ret; | |
1765 | } | |
4235b045 MH |
1766 | |
1767 | return buf - tmp; | |
1768 | } | |
1769 | ||
0e60836b | 1770 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1771 | { |
0e60836b | 1772 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1773 | char *buf; |
1774 | int i, len, ret; | |
1775 | ||
e334016f MH |
1776 | buf = zalloc(MAX_CMDLEN); |
1777 | if (buf == NULL) | |
1778 | return NULL; | |
1779 | ||
eb948e50 MH |
1780 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s ", tp->retprobe ? 'r' : 'p', |
1781 | tev->group, tev->event); | |
1782 | if (len <= 0) | |
1783 | goto error; | |
1784 | ||
1785 | /* Uprobes must have tp->address and tp->module */ | |
1786 | if (tev->uprobes && (!tp->address || !tp->module)) | |
1787 | goto error; | |
1788 | ||
1789 | /* Use the tp->address for uprobes */ | |
225466f1 | 1790 | if (tev->uprobes) |
eb948e50 MH |
1791 | ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s:0x%lx", |
1792 | tp->module, tp->address); | |
225466f1 | 1793 | else |
eb948e50 | 1794 | ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s%s%s+%lu", |
225466f1 SD |
1795 | tp->module ?: "", tp->module ? ":" : "", |
1796 | tp->symbol, tp->offset); | |
1797 | ||
eb948e50 | 1798 | if (ret <= 0) |
50656eec | 1799 | goto error; |
eb948e50 | 1800 | len += ret; |
50656eec | 1801 | |
4235b045 | 1802 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1803 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1804 | MAX_CMDLEN - len); |
4de189fe | 1805 | if (ret <= 0) |
50656eec MH |
1806 | goto error; |
1807 | len += ret; | |
1808 | } | |
50656eec | 1809 | |
4235b045 | 1810 | return buf; |
50656eec | 1811 | error: |
4235b045 MH |
1812 | free(buf); |
1813 | return NULL; | |
1814 | } | |
50656eec | 1815 | |
5a6f6314 MH |
1816 | static int find_perf_probe_point_from_map(struct probe_trace_point *tp, |
1817 | struct perf_probe_point *pp, | |
1818 | bool is_kprobe) | |
1819 | { | |
1820 | struct symbol *sym = NULL; | |
1821 | struct map *map; | |
1822 | u64 addr; | |
1823 | int ret = -ENOENT; | |
1824 | ||
1825 | if (!is_kprobe) { | |
1826 | map = dso__new_map(tp->module); | |
1827 | if (!map) | |
1828 | goto out; | |
1829 | addr = tp->address; | |
1830 | sym = map__find_symbol(map, addr, NULL); | |
1831 | } else { | |
1832 | addr = kernel_get_symbol_address_by_name(tp->symbol, true); | |
1833 | if (addr) { | |
1834 | addr += tp->offset; | |
1835 | sym = __find_kernel_function(addr, &map); | |
1836 | } | |
1837 | } | |
1838 | if (!sym) | |
1839 | goto out; | |
1840 | ||
1841 | pp->retprobe = tp->retprobe; | |
1842 | pp->offset = addr - map->unmap_ip(map, sym->start); | |
1843 | pp->function = strdup(sym->name); | |
1844 | ret = pp->function ? 0 : -ENOMEM; | |
1845 | ||
1846 | out: | |
1847 | if (map && !is_kprobe) { | |
84c2cafa | 1848 | map__put(map); |
5a6f6314 MH |
1849 | } |
1850 | ||
1851 | return ret; | |
1852 | } | |
1853 | ||
1854 | static int convert_to_perf_probe_point(struct probe_trace_point *tp, | |
1855 | struct perf_probe_point *pp, | |
1856 | bool is_kprobe) | |
1857 | { | |
1858 | char buf[128]; | |
1859 | int ret; | |
1860 | ||
1861 | ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe); | |
1862 | if (!ret) | |
1863 | return 0; | |
1864 | ret = find_perf_probe_point_from_map(tp, pp, is_kprobe); | |
1865 | if (!ret) | |
1866 | return 0; | |
1867 | ||
1868 | pr_debug("Failed to find probe point from both of dwarf and map.\n"); | |
1869 | ||
1870 | if (tp->symbol) { | |
1871 | pp->function = strdup(tp->symbol); | |
1872 | pp->offset = tp->offset; | |
1873 | } else if (!tp->module && !is_kprobe) { | |
1874 | ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address); | |
1875 | if (ret < 0) | |
1876 | return ret; | |
1877 | pp->function = strdup(buf); | |
1878 | pp->offset = 0; | |
1879 | } | |
1880 | if (pp->function == NULL) | |
1881 | return -ENOMEM; | |
1882 | ||
1883 | pp->retprobe = tp->retprobe; | |
1884 | ||
1885 | return 0; | |
1886 | } | |
1887 | ||
0e60836b | 1888 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
225466f1 | 1889 | struct perf_probe_event *pev, bool is_kprobe) |
4235b045 | 1890 | { |
02b95dad | 1891 | char buf[64] = ""; |
146a1439 | 1892 | int i, ret; |
4235b045 | 1893 | |
4b4da7f7 | 1894 | /* Convert event/group name */ |
02b95dad MH |
1895 | pev->event = strdup(tev->event); |
1896 | pev->group = strdup(tev->group); | |
1897 | if (pev->event == NULL || pev->group == NULL) | |
1898 | return -ENOMEM; | |
fb1587d8 | 1899 | |
4b4da7f7 | 1900 | /* Convert trace_point to probe_point */ |
5a6f6314 | 1901 | ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe); |
146a1439 MH |
1902 | if (ret < 0) |
1903 | return ret; | |
4b4da7f7 | 1904 | |
4235b045 MH |
1905 | /* Convert trace_arg to probe_arg */ |
1906 | pev->nargs = tev->nargs; | |
e334016f MH |
1907 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1908 | if (pev->args == NULL) | |
1909 | return -ENOMEM; | |
02b95dad | 1910 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1911 | if (tev->args[i].name) |
02b95dad | 1912 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1913 | else { |
0e60836b | 1914 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1915 | buf, 64); |
02b95dad | 1916 | pev->args[i].name = strdup(buf); |
4235b045 | 1917 | } |
02b95dad MH |
1918 | if (pev->args[i].name == NULL && ret >= 0) |
1919 | ret = -ENOMEM; | |
1920 | } | |
146a1439 MH |
1921 | |
1922 | if (ret < 0) | |
1923 | clear_perf_probe_event(pev); | |
1924 | ||
1925 | return ret; | |
4235b045 MH |
1926 | } |
1927 | ||
1928 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1929 | { | |
7df2f329 | 1930 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1931 | int i; |
1932 | ||
f5385650 ACM |
1933 | free(pev->event); |
1934 | free(pev->group); | |
7afb3fab | 1935 | free(pev->target); |
9b118aca | 1936 | clear_perf_probe_point(&pev->point); |
f5385650 | 1937 | |
7df2f329 | 1938 | for (i = 0; i < pev->nargs; i++) { |
f5385650 ACM |
1939 | free(pev->args[i].name); |
1940 | free(pev->args[i].var); | |
1941 | free(pev->args[i].type); | |
7df2f329 MH |
1942 | field = pev->args[i].field; |
1943 | while (field) { | |
1944 | next = field->next; | |
74cf249d | 1945 | zfree(&field->name); |
7df2f329 MH |
1946 | free(field); |
1947 | field = next; | |
1948 | } | |
1949 | } | |
f5385650 | 1950 | free(pev->args); |
4235b045 MH |
1951 | memset(pev, 0, sizeof(*pev)); |
1952 | } | |
1953 | ||
0e60836b | 1954 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1955 | { |
0e60836b | 1956 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1957 | int i; |
1958 | ||
f5385650 ACM |
1959 | free(tev->event); |
1960 | free(tev->group); | |
1961 | free(tev->point.symbol); | |
4c859351 | 1962 | free(tev->point.realname); |
f5385650 | 1963 | free(tev->point.module); |
4235b045 | 1964 | for (i = 0; i < tev->nargs; i++) { |
f5385650 ACM |
1965 | free(tev->args[i].name); |
1966 | free(tev->args[i].value); | |
1967 | free(tev->args[i].type); | |
4235b045 MH |
1968 | ref = tev->args[i].ref; |
1969 | while (ref) { | |
1970 | next = ref->next; | |
1971 | free(ref); | |
1972 | ref = next; | |
1973 | } | |
1974 | } | |
f5385650 | 1975 | free(tev->args); |
4235b045 | 1976 | memset(tev, 0, sizeof(*tev)); |
50656eec MH |
1977 | } |
1978 | ||
5e45187c | 1979 | static void print_open_warning(int err, bool is_kprobe) |
225466f1 | 1980 | { |
5f03cba4 | 1981 | char sbuf[STRERR_BUFSIZE]; |
225466f1 | 1982 | |
5e45187c | 1983 | if (err == -ENOENT) { |
225466f1 SD |
1984 | const char *config; |
1985 | ||
1986 | if (!is_kprobe) | |
1987 | config = "CONFIG_UPROBE_EVENTS"; | |
1988 | else | |
1989 | config = "CONFIG_KPROBE_EVENTS"; | |
1990 | ||
5e45187c MH |
1991 | pr_warning("%cprobe_events file does not exist" |
1992 | " - please rebuild kernel with %s.\n", | |
1993 | is_kprobe ? 'k' : 'u', config); | |
1994 | } else if (err == -ENOTSUP) | |
23773ca1 | 1995 | pr_warning("Tracefs or debugfs is not mounted.\n"); |
5e45187c MH |
1996 | else |
1997 | pr_warning("Failed to open %cprobe_events: %s\n", | |
1998 | is_kprobe ? 'k' : 'u', | |
1999 | strerror_r(-err, sbuf, sizeof(sbuf))); | |
225466f1 SD |
2000 | } |
2001 | ||
467ec085 MH |
2002 | static void print_both_open_warning(int kerr, int uerr) |
2003 | { | |
2004 | /* Both kprobes and uprobes are disabled, warn it. */ | |
2005 | if (kerr == -ENOTSUP && uerr == -ENOTSUP) | |
23773ca1 | 2006 | pr_warning("Tracefs or debugfs is not mounted.\n"); |
467ec085 MH |
2007 | else if (kerr == -ENOENT && uerr == -ENOENT) |
2008 | pr_warning("Please rebuild kernel with CONFIG_KPROBE_EVENTS " | |
2009 | "or/and CONFIG_UPROBE_EVENTS.\n"); | |
2010 | else { | |
5f03cba4 | 2011 | char sbuf[STRERR_BUFSIZE]; |
467ec085 MH |
2012 | pr_warning("Failed to open kprobe events: %s.\n", |
2013 | strerror_r(-kerr, sbuf, sizeof(sbuf))); | |
2014 | pr_warning("Failed to open uprobe events: %s.\n", | |
2015 | strerror_r(-uerr, sbuf, sizeof(sbuf))); | |
2016 | } | |
2017 | } | |
2018 | ||
5e45187c | 2019 | static int open_probe_events(const char *trace_file, bool readwrite) |
4de189fe MH |
2020 | { |
2021 | char buf[PATH_MAX]; | |
7ca5989d | 2022 | const char *__debugfs; |
23773ca1 | 2023 | const char *tracing_dir = ""; |
4de189fe MH |
2024 | int ret; |
2025 | ||
23773ca1 SRRH |
2026 | __debugfs = tracefs_find_mountpoint(); |
2027 | if (__debugfs == NULL) { | |
2028 | tracing_dir = "tracing/"; | |
7ca5989d | 2029 | |
23773ca1 SRRH |
2030 | __debugfs = debugfs_find_mountpoint(); |
2031 | if (__debugfs == NULL) | |
2032 | return -ENOTSUP; | |
2033 | } | |
2034 | ||
2035 | ret = e_snprintf(buf, PATH_MAX, "%s/%s%s", | |
2036 | __debugfs, tracing_dir, trace_file); | |
146a1439 | 2037 | if (ret >= 0) { |
7ca5989d | 2038 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 | 2039 | if (readwrite && !probe_event_dry_run) |
b8dc3984 | 2040 | ret = open(buf, O_RDWR | O_APPEND, 0); |
146a1439 MH |
2041 | else |
2042 | ret = open(buf, O_RDONLY, 0); | |
f4d7da49 | 2043 | |
225466f1 | 2044 | if (ret < 0) |
5e45187c | 2045 | ret = -errno; |
4de189fe MH |
2046 | } |
2047 | return ret; | |
2048 | } | |
2049 | ||
225466f1 SD |
2050 | static int open_kprobe_events(bool readwrite) |
2051 | { | |
23773ca1 | 2052 | return open_probe_events("kprobe_events", readwrite); |
225466f1 SD |
2053 | } |
2054 | ||
2055 | static int open_uprobe_events(bool readwrite) | |
2056 | { | |
23773ca1 | 2057 | return open_probe_events("uprobe_events", readwrite); |
225466f1 SD |
2058 | } |
2059 | ||
2060 | /* Get raw string list of current kprobe_events or uprobe_events */ | |
0e60836b | 2061 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
2062 | { |
2063 | int ret, idx; | |
2064 | FILE *fp; | |
2065 | char buf[MAX_CMDLEN]; | |
2066 | char *p; | |
2067 | struct strlist *sl; | |
2068 | ||
4a77e218 | 2069 | sl = strlist__new(NULL, NULL); |
4de189fe MH |
2070 | |
2071 | fp = fdopen(dup(fd), "r"); | |
2072 | while (!feof(fp)) { | |
2073 | p = fgets(buf, MAX_CMDLEN, fp); | |
2074 | if (!p) | |
2075 | break; | |
2076 | ||
2077 | idx = strlen(p) - 1; | |
2078 | if (p[idx] == '\n') | |
2079 | p[idx] = '\0'; | |
2080 | ret = strlist__add(sl, buf); | |
146a1439 | 2081 | if (ret < 0) { |
6eb08660 | 2082 | pr_debug("strlist__add failed (%d)\n", ret); |
146a1439 MH |
2083 | strlist__delete(sl); |
2084 | return NULL; | |
2085 | } | |
4de189fe MH |
2086 | } |
2087 | fclose(fp); | |
2088 | ||
2089 | return sl; | |
2090 | } | |
2091 | ||
9aaf5a5f MH |
2092 | struct kprobe_blacklist_node { |
2093 | struct list_head list; | |
2094 | unsigned long start; | |
2095 | unsigned long end; | |
2096 | char *symbol; | |
2097 | }; | |
2098 | ||
2099 | static void kprobe_blacklist__delete(struct list_head *blacklist) | |
2100 | { | |
2101 | struct kprobe_blacklist_node *node; | |
2102 | ||
2103 | while (!list_empty(blacklist)) { | |
2104 | node = list_first_entry(blacklist, | |
2105 | struct kprobe_blacklist_node, list); | |
2106 | list_del(&node->list); | |
2107 | free(node->symbol); | |
2108 | free(node); | |
2109 | } | |
2110 | } | |
2111 | ||
2112 | static int kprobe_blacklist__load(struct list_head *blacklist) | |
2113 | { | |
2114 | struct kprobe_blacklist_node *node; | |
2115 | const char *__debugfs = debugfs_find_mountpoint(); | |
2116 | char buf[PATH_MAX], *p; | |
2117 | FILE *fp; | |
2118 | int ret; | |
2119 | ||
2120 | if (__debugfs == NULL) | |
2121 | return -ENOTSUP; | |
2122 | ||
2123 | ret = e_snprintf(buf, PATH_MAX, "%s/kprobes/blacklist", __debugfs); | |
2124 | if (ret < 0) | |
2125 | return ret; | |
2126 | ||
2127 | fp = fopen(buf, "r"); | |
2128 | if (!fp) | |
2129 | return -errno; | |
2130 | ||
2131 | ret = 0; | |
2132 | while (fgets(buf, PATH_MAX, fp)) { | |
2133 | node = zalloc(sizeof(*node)); | |
2134 | if (!node) { | |
2135 | ret = -ENOMEM; | |
2136 | break; | |
2137 | } | |
2138 | INIT_LIST_HEAD(&node->list); | |
2139 | list_add_tail(&node->list, blacklist); | |
2140 | if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) { | |
2141 | ret = -EINVAL; | |
2142 | break; | |
2143 | } | |
2144 | p = strchr(buf, '\t'); | |
2145 | if (p) { | |
2146 | p++; | |
2147 | if (p[strlen(p) - 1] == '\n') | |
2148 | p[strlen(p) - 1] = '\0'; | |
2149 | } else | |
2150 | p = (char *)"unknown"; | |
2151 | node->symbol = strdup(p); | |
2152 | if (!node->symbol) { | |
2153 | ret = -ENOMEM; | |
2154 | break; | |
2155 | } | |
2156 | pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n", | |
2157 | node->start, node->end, node->symbol); | |
2158 | ret++; | |
2159 | } | |
2160 | if (ret < 0) | |
2161 | kprobe_blacklist__delete(blacklist); | |
2162 | fclose(fp); | |
2163 | ||
2164 | return ret; | |
2165 | } | |
2166 | ||
2167 | static struct kprobe_blacklist_node * | |
2168 | kprobe_blacklist__find_by_address(struct list_head *blacklist, | |
2169 | unsigned long address) | |
2170 | { | |
2171 | struct kprobe_blacklist_node *node; | |
2172 | ||
2173 | list_for_each_entry(node, blacklist, list) { | |
2174 | if (node->start <= address && address <= node->end) | |
2175 | return node; | |
2176 | } | |
2177 | ||
2178 | return NULL; | |
2179 | } | |
2180 | ||
b031220d MH |
2181 | static LIST_HEAD(kprobe_blacklist); |
2182 | ||
2183 | static void kprobe_blacklist__init(void) | |
2184 | { | |
2185 | if (!list_empty(&kprobe_blacklist)) | |
2186 | return; | |
2187 | ||
2188 | if (kprobe_blacklist__load(&kprobe_blacklist) < 0) | |
2189 | pr_debug("No kprobe blacklist support, ignored\n"); | |
2190 | } | |
2191 | ||
2192 | static void kprobe_blacklist__release(void) | |
2193 | { | |
2194 | kprobe_blacklist__delete(&kprobe_blacklist); | |
2195 | } | |
2196 | ||
2197 | static bool kprobe_blacklist__listed(unsigned long address) | |
2198 | { | |
2199 | return !!kprobe_blacklist__find_by_address(&kprobe_blacklist, address); | |
2200 | } | |
2201 | ||
d350bd57 MH |
2202 | static int perf_probe_event__sprintf(const char *group, const char *event, |
2203 | struct perf_probe_event *pev, | |
ba7ecb02 MH |
2204 | const char *module, |
2205 | struct strbuf *result) | |
278498d4 | 2206 | { |
7e990a51 | 2207 | int i, ret; |
278498d4 | 2208 | char buf[128]; |
4235b045 | 2209 | char *place; |
278498d4 | 2210 | |
4235b045 MH |
2211 | /* Synthesize only event probe point */ |
2212 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
2213 | if (!place) |
2214 | return -EINVAL; | |
4235b045 | 2215 | |
d350bd57 | 2216 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
7e990a51 | 2217 | if (ret < 0) |
ba7ecb02 | 2218 | goto out; |
146a1439 | 2219 | |
ba7ecb02 | 2220 | strbuf_addf(result, " %-20s (on %s", buf, place); |
fb226ccd | 2221 | if (module) |
ba7ecb02 | 2222 | strbuf_addf(result, " in %s", module); |
278498d4 | 2223 | |
4235b045 | 2224 | if (pev->nargs > 0) { |
ba7ecb02 | 2225 | strbuf_addstr(result, " with"); |
7df2f329 | 2226 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
2227 | ret = synthesize_perf_probe_arg(&pev->args[i], |
2228 | buf, 128); | |
2229 | if (ret < 0) | |
ba7ecb02 MH |
2230 | goto out; |
2231 | strbuf_addf(result, " %s", buf); | |
7df2f329 | 2232 | } |
278498d4 | 2233 | } |
ba7ecb02 MH |
2234 | strbuf_addch(result, ')'); |
2235 | out: | |
4235b045 | 2236 | free(place); |
146a1439 | 2237 | return ret; |
278498d4 MH |
2238 | } |
2239 | ||
ba7ecb02 | 2240 | /* Show an event */ |
d350bd57 MH |
2241 | static int show_perf_probe_event(const char *group, const char *event, |
2242 | struct perf_probe_event *pev, | |
ba7ecb02 MH |
2243 | const char *module, bool use_stdout) |
2244 | { | |
2245 | struct strbuf buf = STRBUF_INIT; | |
2246 | int ret; | |
2247 | ||
d350bd57 | 2248 | ret = perf_probe_event__sprintf(group, event, pev, module, &buf); |
ba7ecb02 MH |
2249 | if (ret >= 0) { |
2250 | if (use_stdout) | |
2251 | printf("%s\n", buf.buf); | |
2252 | else | |
2253 | pr_info("%s\n", buf.buf); | |
2254 | } | |
2255 | strbuf_release(&buf); | |
2256 | ||
2257 | return ret; | |
2258 | } | |
2259 | ||
b6a89643 MH |
2260 | static bool filter_probe_trace_event(struct probe_trace_event *tev, |
2261 | struct strfilter *filter) | |
2262 | { | |
2263 | char tmp[128]; | |
2264 | ||
2265 | /* At first, check the event name itself */ | |
2266 | if (strfilter__compare(filter, tev->event)) | |
2267 | return true; | |
2268 | ||
2269 | /* Next, check the combination of name and group */ | |
2270 | if (e_snprintf(tmp, 128, "%s:%s", tev->group, tev->event) < 0) | |
2271 | return false; | |
2272 | return strfilter__compare(filter, tmp); | |
2273 | } | |
2274 | ||
2275 | static int __show_perf_probe_events(int fd, bool is_kprobe, | |
2276 | struct strfilter *filter) | |
4de189fe | 2277 | { |
225466f1 | 2278 | int ret = 0; |
0e60836b | 2279 | struct probe_trace_event tev; |
4235b045 | 2280 | struct perf_probe_event pev; |
4de189fe MH |
2281 | struct strlist *rawlist; |
2282 | struct str_node *ent; | |
2283 | ||
4235b045 MH |
2284 | memset(&tev, 0, sizeof(tev)); |
2285 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 2286 | |
0e60836b | 2287 | rawlist = get_probe_trace_command_rawlist(fd); |
146a1439 | 2288 | if (!rawlist) |
6eb08660 | 2289 | return -ENOMEM; |
4de189fe | 2290 | |
adf365f4 | 2291 | strlist__for_each(ent, rawlist) { |
0e60836b | 2292 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 | 2293 | if (ret >= 0) { |
b6a89643 MH |
2294 | if (!filter_probe_trace_event(&tev, filter)) |
2295 | goto next; | |
225466f1 SD |
2296 | ret = convert_to_perf_probe_event(&tev, &pev, |
2297 | is_kprobe); | |
ba7ecb02 MH |
2298 | if (ret < 0) |
2299 | goto next; | |
d350bd57 MH |
2300 | ret = show_perf_probe_event(pev.group, pev.event, |
2301 | &pev, tev.point.module, | |
ba7ecb02 | 2302 | true); |
146a1439 | 2303 | } |
b6a89643 | 2304 | next: |
4235b045 | 2305 | clear_perf_probe_event(&pev); |
0e60836b | 2306 | clear_probe_trace_event(&tev); |
146a1439 MH |
2307 | if (ret < 0) |
2308 | break; | |
4de189fe | 2309 | } |
4de189fe | 2310 | strlist__delete(rawlist); |
7737af01 MH |
2311 | /* Cleanup cached debuginfo if needed */ |
2312 | debuginfo_cache__exit(); | |
146a1439 MH |
2313 | |
2314 | return ret; | |
4de189fe MH |
2315 | } |
2316 | ||
225466f1 | 2317 | /* List up current perf-probe events */ |
b6a89643 | 2318 | int show_perf_probe_events(struct strfilter *filter) |
225466f1 | 2319 | { |
5e45187c | 2320 | int kp_fd, up_fd, ret; |
225466f1 SD |
2321 | |
2322 | setup_pager(); | |
225466f1 | 2323 | |
ee45b6c2 | 2324 | ret = init_symbol_maps(false); |
225466f1 SD |
2325 | if (ret < 0) |
2326 | return ret; | |
2327 | ||
5e45187c MH |
2328 | kp_fd = open_kprobe_events(false); |
2329 | if (kp_fd >= 0) { | |
b6a89643 | 2330 | ret = __show_perf_probe_events(kp_fd, true, filter); |
5e45187c MH |
2331 | close(kp_fd); |
2332 | if (ret < 0) | |
2333 | goto out; | |
2334 | } | |
225466f1 | 2335 | |
5e45187c MH |
2336 | up_fd = open_uprobe_events(false); |
2337 | if (kp_fd < 0 && up_fd < 0) { | |
467ec085 | 2338 | print_both_open_warning(kp_fd, up_fd); |
5e45187c MH |
2339 | ret = kp_fd; |
2340 | goto out; | |
225466f1 SD |
2341 | } |
2342 | ||
5e45187c | 2343 | if (up_fd >= 0) { |
b6a89643 | 2344 | ret = __show_perf_probe_events(up_fd, false, filter); |
5e45187c MH |
2345 | close(up_fd); |
2346 | } | |
2347 | out: | |
ee45b6c2 | 2348 | exit_symbol_maps(); |
225466f1 SD |
2349 | return ret; |
2350 | } | |
2351 | ||
b498ce1f | 2352 | /* Get current perf-probe event names */ |
0e60836b | 2353 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 2354 | { |
fa28244d | 2355 | char buf[128]; |
b498ce1f MH |
2356 | struct strlist *sl, *rawlist; |
2357 | struct str_node *ent; | |
0e60836b | 2358 | struct probe_trace_event tev; |
146a1439 | 2359 | int ret = 0; |
b498ce1f | 2360 | |
4235b045 | 2361 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 2362 | rawlist = get_probe_trace_command_rawlist(fd); |
6eb08660 MH |
2363 | if (!rawlist) |
2364 | return NULL; | |
4a77e218 | 2365 | sl = strlist__new(NULL, NULL); |
adf365f4 | 2366 | strlist__for_each(ent, rawlist) { |
0e60836b | 2367 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
2368 | if (ret < 0) |
2369 | break; | |
fa28244d | 2370 | if (include_group) { |
146a1439 MH |
2371 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
2372 | tev.event); | |
2373 | if (ret >= 0) | |
2374 | ret = strlist__add(sl, buf); | |
fa28244d | 2375 | } else |
146a1439 | 2376 | ret = strlist__add(sl, tev.event); |
0e60836b | 2377 | clear_probe_trace_event(&tev); |
146a1439 MH |
2378 | if (ret < 0) |
2379 | break; | |
b498ce1f | 2380 | } |
b498ce1f MH |
2381 | strlist__delete(rawlist); |
2382 | ||
146a1439 MH |
2383 | if (ret < 0) { |
2384 | strlist__delete(sl); | |
2385 | return NULL; | |
2386 | } | |
b498ce1f MH |
2387 | return sl; |
2388 | } | |
2389 | ||
0e60836b | 2390 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 2391 | { |
6eca8cc3 | 2392 | int ret = 0; |
0e60836b | 2393 | char *buf = synthesize_probe_trace_command(tev); |
5f03cba4 | 2394 | char sbuf[STRERR_BUFSIZE]; |
50656eec | 2395 | |
146a1439 | 2396 | if (!buf) { |
0e60836b | 2397 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
2398 | return -EINVAL; |
2399 | } | |
2400 | ||
fa28244d | 2401 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
2402 | if (!probe_event_dry_run) { |
2403 | ret = write(fd, buf, strlen(buf)); | |
7949ba1f NK |
2404 | if (ret <= 0) { |
2405 | ret = -errno; | |
146a1439 | 2406 | pr_warning("Failed to write event: %s\n", |
5f03cba4 | 2407 | strerror_r(errno, sbuf, sizeof(sbuf))); |
7949ba1f | 2408 | } |
f4d7da49 | 2409 | } |
4235b045 | 2410 | free(buf); |
146a1439 | 2411 | return ret; |
50656eec MH |
2412 | } |
2413 | ||
146a1439 MH |
2414 | static int get_new_event_name(char *buf, size_t len, const char *base, |
2415 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
2416 | { |
2417 | int i, ret; | |
35a23ff9 | 2418 | char *p; |
17f88fcd | 2419 | |
3099c026 NR |
2420 | if (*base == '.') |
2421 | base++; | |
2422 | ||
17f88fcd MH |
2423 | /* Try no suffix */ |
2424 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 | 2425 | if (ret < 0) { |
5f03cba4 | 2426 | pr_debug("snprintf() failed: %d\n", ret); |
146a1439 MH |
2427 | return ret; |
2428 | } | |
35a23ff9 MH |
2429 | /* Cut off the postfixes (e.g. .const, .isra)*/ |
2430 | p = strchr(buf, '.'); | |
2431 | if (p && p != buf) | |
2432 | *p = '\0'; | |
17f88fcd | 2433 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 2434 | return 0; |
17f88fcd | 2435 | |
d761b08b MH |
2436 | if (!allow_suffix) { |
2437 | pr_warning("Error: event \"%s\" already exists. " | |
2438 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 2439 | return -EEXIST; |
d761b08b MH |
2440 | } |
2441 | ||
17f88fcd MH |
2442 | /* Try to add suffix */ |
2443 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 2444 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 | 2445 | if (ret < 0) { |
5f03cba4 | 2446 | pr_debug("snprintf() failed: %d\n", ret); |
146a1439 MH |
2447 | return ret; |
2448 | } | |
b498ce1f MH |
2449 | if (!strlist__has_entry(namelist, buf)) |
2450 | break; | |
2451 | } | |
146a1439 MH |
2452 | if (i == MAX_EVENT_INDEX) { |
2453 | pr_warning("Too many events are on the same function.\n"); | |
2454 | ret = -ERANGE; | |
2455 | } | |
2456 | ||
2457 | return ret; | |
b498ce1f MH |
2458 | } |
2459 | ||
79702f61 MH |
2460 | /* Warn if the current kernel's uprobe implementation is old */ |
2461 | static void warn_uprobe_event_compat(struct probe_trace_event *tev) | |
2462 | { | |
2463 | int i; | |
2464 | char *buf = synthesize_probe_trace_command(tev); | |
2465 | ||
2466 | /* Old uprobe event doesn't support memory dereference */ | |
2467 | if (!tev->uprobes || tev->nargs == 0 || !buf) | |
2468 | goto out; | |
2469 | ||
2470 | for (i = 0; i < tev->nargs; i++) | |
2471 | if (strglobmatch(tev->args[i].value, "[$@+-]*")) { | |
2472 | pr_warning("Please upgrade your kernel to at least " | |
2473 | "3.14 to have access to feature %s\n", | |
2474 | tev->args[i].value); | |
2475 | break; | |
2476 | } | |
2477 | out: | |
2478 | free(buf); | |
2479 | } | |
2480 | ||
0e60836b SD |
2481 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
2482 | struct probe_trace_event *tevs, | |
146a1439 | 2483 | int ntevs, bool allow_suffix) |
50656eec | 2484 | { |
146a1439 | 2485 | int i, fd, ret; |
0e60836b | 2486 | struct probe_trace_event *tev = NULL; |
4235b045 | 2487 | char buf[64]; |
d350bd57 | 2488 | const char *event = NULL, *group = NULL; |
b498ce1f | 2489 | struct strlist *namelist; |
4c859351 | 2490 | bool safename; |
50656eec | 2491 | |
225466f1 SD |
2492 | if (pev->uprobes) |
2493 | fd = open_uprobe_events(true); | |
2494 | else | |
2495 | fd = open_kprobe_events(true); | |
2496 | ||
5e45187c MH |
2497 | if (fd < 0) { |
2498 | print_open_warning(fd, !pev->uprobes); | |
146a1439 | 2499 | return fd; |
5e45187c MH |
2500 | } |
2501 | ||
b498ce1f | 2502 | /* Get current event names */ |
0e60836b | 2503 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
2504 | if (!namelist) { |
2505 | pr_debug("Failed to get current event list.\n"); | |
ae2cb1ac MH |
2506 | ret = -ENOMEM; |
2507 | goto close_out; | |
146a1439 | 2508 | } |
4235b045 | 2509 | |
4c859351 | 2510 | safename = (pev->point.function && !strisglob(pev->point.function)); |
146a1439 | 2511 | ret = 0; |
5e17b28f | 2512 | pr_info("Added new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 2513 | for (i = 0; i < ntevs; i++) { |
4235b045 | 2514 | tev = &tevs[i]; |
b031220d | 2515 | /* Skip if the symbol is out of .text or blacklisted */ |
5a51fcd1 MH |
2516 | if (!tev->point.symbol) |
2517 | continue; | |
9aaf5a5f | 2518 | |
4235b045 MH |
2519 | if (pev->event) |
2520 | event = pev->event; | |
2521 | else | |
4c859351 | 2522 | if (safename) |
4235b045 MH |
2523 | event = pev->point.function; |
2524 | else | |
4c859351 | 2525 | event = tev->point.realname; |
4235b045 MH |
2526 | if (pev->group) |
2527 | group = pev->group; | |
2528 | else | |
2529 | group = PERFPROBE_GROUP; | |
2530 | ||
2531 | /* Get an unused new event name */ | |
146a1439 MH |
2532 | ret = get_new_event_name(buf, 64, event, |
2533 | namelist, allow_suffix); | |
2534 | if (ret < 0) | |
2535 | break; | |
4235b045 MH |
2536 | event = buf; |
2537 | ||
02b95dad MH |
2538 | tev->event = strdup(event); |
2539 | tev->group = strdup(group); | |
2540 | if (tev->event == NULL || tev->group == NULL) { | |
2541 | ret = -ENOMEM; | |
2542 | break; | |
2543 | } | |
0e60836b | 2544 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
2545 | if (ret < 0) |
2546 | break; | |
4235b045 MH |
2547 | /* Add added event name to namelist */ |
2548 | strlist__add(namelist, event); | |
2549 | ||
d350bd57 MH |
2550 | /* We use tev's name for showing new events */ |
2551 | show_perf_probe_event(tev->group, tev->event, pev, | |
2552 | tev->point.module, false); | |
2553 | /* Save the last valid name */ | |
2554 | event = tev->event; | |
2555 | group = tev->group; | |
4235b045 MH |
2556 | |
2557 | /* | |
2558 | * Probes after the first probe which comes from same | |
2559 | * user input are always allowed to add suffix, because | |
2560 | * there might be several addresses corresponding to | |
2561 | * one code line. | |
2562 | */ | |
2563 | allow_suffix = true; | |
50656eec | 2564 | } |
79702f61 MH |
2565 | if (ret == -EINVAL && pev->uprobes) |
2566 | warn_uprobe_event_compat(tev); | |
146a1439 | 2567 | |
9aaf5a5f | 2568 | /* Note that it is possible to skip all events because of blacklist */ |
d350bd57 | 2569 | if (ret >= 0 && event) { |
146a1439 | 2570 | /* Show how to use the event. */ |
5e17b28f | 2571 | pr_info("\nYou can now use it in all perf tools, such as:\n\n"); |
d350bd57 | 2572 | pr_info("\tperf record -e %s:%s -aR sleep 1\n\n", group, event); |
146a1439 | 2573 | } |
a9b495b0 | 2574 | |
e1d2017b | 2575 | strlist__delete(namelist); |
ae2cb1ac | 2576 | close_out: |
50656eec | 2577 | close(fd); |
146a1439 | 2578 | return ret; |
50656eec | 2579 | } |
fa28244d | 2580 | |
6bb536cc WN |
2581 | static int find_probe_functions(struct map *map, char *name, |
2582 | struct symbol **syms) | |
eb948e50 | 2583 | { |
564c62a4 | 2584 | int found = 0; |
0a3873a8 | 2585 | struct symbol *sym; |
4c859351 | 2586 | struct rb_node *tmp; |
564c62a4 | 2587 | |
75e4a2a6 WN |
2588 | if (map__load(map, NULL) < 0) |
2589 | return 0; | |
2590 | ||
4c859351 | 2591 | map__for_each_symbol(map, sym, tmp) { |
6bb536cc | 2592 | if (strglobmatch(sym->name, name)) { |
4c859351 | 2593 | found++; |
6bb536cc WN |
2594 | if (syms && found < probe_conf.max_probes) |
2595 | syms[found - 1] = sym; | |
2596 | } | |
eb948e50 | 2597 | } |
564c62a4 NK |
2598 | |
2599 | return found; | |
eb948e50 MH |
2600 | } |
2601 | ||
2602 | #define strdup_or_goto(str, label) \ | |
2603 | ({ char *__p = strdup(str); if (!__p) goto label; __p; }) | |
2604 | ||
7b6ff0bd NR |
2605 | void __weak arch__fix_tev_from_maps(struct perf_probe_event *pev __maybe_unused, |
2606 | struct probe_trace_event *tev __maybe_unused, | |
2607 | struct map *map __maybe_unused) { } | |
2608 | ||
eb948e50 MH |
2609 | /* |
2610 | * Find probe function addresses from map. | |
2611 | * Return an error or the number of found probe_trace_event | |
2612 | */ | |
2613 | static int find_probe_trace_events_from_map(struct perf_probe_event *pev, | |
ddb2f58f | 2614 | struct probe_trace_event **tevs) |
e0faa8d3 | 2615 | { |
eb948e50 | 2616 | struct map *map = NULL; |
eb948e50 | 2617 | struct ref_reloc_sym *reloc_sym = NULL; |
e0faa8d3 | 2618 | struct symbol *sym; |
6bb536cc | 2619 | struct symbol **syms = NULL; |
0e60836b | 2620 | struct probe_trace_event *tev; |
eb948e50 MH |
2621 | struct perf_probe_point *pp = &pev->point; |
2622 | struct probe_trace_point *tp; | |
564c62a4 | 2623 | int num_matched_functions; |
b031220d | 2624 | int ret, i, j, skipped = 0; |
4235b045 | 2625 | |
44225521 | 2626 | map = get_target_map(pev->target, pev->uprobes); |
eb948e50 MH |
2627 | if (!map) { |
2628 | ret = -EINVAL; | |
2629 | goto out; | |
fb7345bb MH |
2630 | } |
2631 | ||
6bb536cc WN |
2632 | syms = malloc(sizeof(struct symbol *) * probe_conf.max_probes); |
2633 | if (!syms) { | |
2634 | ret = -ENOMEM; | |
2635 | goto out; | |
2636 | } | |
2637 | ||
eb948e50 MH |
2638 | /* |
2639 | * Load matched symbols: Since the different local symbols may have | |
2640 | * same name but different addresses, this lists all the symbols. | |
2641 | */ | |
6bb536cc | 2642 | num_matched_functions = find_probe_functions(map, pp->function, syms); |
564c62a4 | 2643 | if (num_matched_functions == 0) { |
eb948e50 | 2644 | pr_err("Failed to find symbol %s in %s\n", pp->function, |
44225521 | 2645 | pev->target ? : "kernel"); |
eb948e50 MH |
2646 | ret = -ENOENT; |
2647 | goto out; | |
ddb2f58f | 2648 | } else if (num_matched_functions > probe_conf.max_probes) { |
eb948e50 | 2649 | pr_err("Too many functions matched in %s\n", |
44225521 | 2650 | pev->target ? : "kernel"); |
eb948e50 MH |
2651 | ret = -E2BIG; |
2652 | goto out; | |
fb7345bb MH |
2653 | } |
2654 | ||
25dd9171 | 2655 | if (!pev->uprobes && !pp->retprobe) { |
0560a0c4 | 2656 | reloc_sym = kernel_get_ref_reloc_sym(); |
eb948e50 MH |
2657 | if (!reloc_sym) { |
2658 | pr_warning("Relocated base symbol is not found!\n"); | |
2659 | ret = -EINVAL; | |
2660 | goto out; | |
2661 | } | |
2662 | } | |
4235b045 | 2663 | |
eb948e50 MH |
2664 | /* Setup result trace-probe-events */ |
2665 | *tevs = zalloc(sizeof(*tev) * num_matched_functions); | |
2666 | if (!*tevs) { | |
02b95dad | 2667 | ret = -ENOMEM; |
eb948e50 | 2668 | goto out; |
02b95dad | 2669 | } |
ce27a443 | 2670 | |
eb948e50 | 2671 | ret = 0; |
564c62a4 | 2672 | |
6bb536cc WN |
2673 | for (j = 0; j < num_matched_functions; j++) { |
2674 | sym = syms[j]; | |
2675 | ||
eb948e50 MH |
2676 | tev = (*tevs) + ret; |
2677 | tp = &tev->point; | |
2678 | if (ret == num_matched_functions) { | |
2679 | pr_warning("Too many symbols are listed. Skip it.\n"); | |
2680 | break; | |
ce27a443 | 2681 | } |
eb948e50 | 2682 | ret++; |
ce27a443 | 2683 | |
eb948e50 MH |
2684 | if (pp->offset > sym->end - sym->start) { |
2685 | pr_warning("Offset %ld is bigger than the size of %s\n", | |
2686 | pp->offset, sym->name); | |
2687 | ret = -ENOENT; | |
2688 | goto err_out; | |
2689 | } | |
2690 | /* Add one probe point */ | |
2691 | tp->address = map->unmap_ip(map, sym->start) + pp->offset; | |
b031220d MH |
2692 | /* If we found a wrong one, mark it by NULL symbol */ |
2693 | if (!pev->uprobes && | |
2694 | kprobe_warn_out_range(sym->name, tp->address)) { | |
2695 | tp->symbol = NULL; /* Skip it */ | |
2696 | skipped++; | |
2697 | } else if (reloc_sym) { | |
eb948e50 MH |
2698 | tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out); |
2699 | tp->offset = tp->address - reloc_sym->addr; | |
2700 | } else { | |
2701 | tp->symbol = strdup_or_goto(sym->name, nomem_out); | |
2702 | tp->offset = pp->offset; | |
2703 | } | |
6bb536cc WN |
2704 | tp->realname = strdup_or_goto(sym->name, nomem_out); |
2705 | ||
eb948e50 | 2706 | tp->retprobe = pp->retprobe; |
44225521 MH |
2707 | if (pev->target) |
2708 | tev->point.module = strdup_or_goto(pev->target, | |
2709 | nomem_out); | |
eb948e50 MH |
2710 | tev->uprobes = pev->uprobes; |
2711 | tev->nargs = pev->nargs; | |
2712 | if (tev->nargs) { | |
2713 | tev->args = zalloc(sizeof(struct probe_trace_arg) * | |
2714 | tev->nargs); | |
2715 | if (tev->args == NULL) | |
2716 | goto nomem_out; | |
e334016f | 2717 | } |
48481938 | 2718 | for (i = 0; i < tev->nargs; i++) { |
eb948e50 MH |
2719 | if (pev->args[i].name) |
2720 | tev->args[i].name = | |
2721 | strdup_or_goto(pev->args[i].name, | |
2722 | nomem_out); | |
2723 | ||
2724 | tev->args[i].value = strdup_or_goto(pev->args[i].var, | |
2725 | nomem_out); | |
2726 | if (pev->args[i].type) | |
2727 | tev->args[i].type = | |
2728 | strdup_or_goto(pev->args[i].type, | |
2729 | nomem_out); | |
48481938 | 2730 | } |
7b6ff0bd | 2731 | arch__fix_tev_from_maps(pev, tev, map); |
4235b045 | 2732 | } |
b031220d MH |
2733 | if (ret == skipped) { |
2734 | ret = -ENOENT; | |
2735 | goto err_out; | |
2736 | } | |
4235b045 | 2737 | |
eb948e50 | 2738 | out: |
9b118aca | 2739 | put_target_map(map, pev->uprobes); |
6bb536cc | 2740 | free(syms); |
eb948e50 | 2741 | return ret; |
225466f1 | 2742 | |
eb948e50 MH |
2743 | nomem_out: |
2744 | ret = -ENOMEM; | |
2745 | err_out: | |
2746 | clear_probe_trace_events(*tevs, num_matched_functions); | |
2747 | zfree(tevs); | |
2748 | goto out; | |
2749 | } | |
1c1bc922 | 2750 | |
d5c2e2c1 NR |
2751 | bool __weak arch__prefers_symtab(void) { return false; } |
2752 | ||
eb948e50 | 2753 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
ddb2f58f | 2754 | struct probe_trace_event **tevs) |
eb948e50 MH |
2755 | { |
2756 | int ret; | |
2757 | ||
2758 | if (pev->uprobes && !pev->group) { | |
2759 | /* Replace group name if not given */ | |
44225521 | 2760 | ret = convert_exec_to_group(pev->target, &pev->group); |
eb948e50 MH |
2761 | if (ret != 0) { |
2762 | pr_warning("Failed to make a group name.\n"); | |
2763 | return ret; | |
2764 | } | |
02b95dad | 2765 | } |
e334016f | 2766 | |
d5c2e2c1 | 2767 | if (arch__prefers_symtab() && !perf_probe_event_need_dwarf(pev)) { |
ddb2f58f | 2768 | ret = find_probe_trace_events_from_map(pev, tevs); |
d5c2e2c1 NR |
2769 | if (ret > 0) |
2770 | return ret; /* Found in symbol table */ | |
2771 | } | |
2772 | ||
eb948e50 | 2773 | /* Convert perf_probe_event with debuginfo */ |
ddb2f58f | 2774 | ret = try_to_find_probe_trace_events(pev, tevs); |
eb948e50 MH |
2775 | if (ret != 0) |
2776 | return ret; /* Found in debuginfo or got an error */ | |
2777 | ||
ddb2f58f | 2778 | return find_probe_trace_events_from_map(pev, tevs); |
4235b045 MH |
2779 | } |
2780 | ||
2781 | struct __event_package { | |
2782 | struct perf_probe_event *pev; | |
0e60836b | 2783 | struct probe_trace_event *tevs; |
4235b045 MH |
2784 | int ntevs; |
2785 | }; | |
2786 | ||
ddb2f58f | 2787 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs) |
4235b045 | 2788 | { |
146a1439 | 2789 | int i, j, ret; |
4235b045 MH |
2790 | struct __event_package *pkgs; |
2791 | ||
225466f1 | 2792 | ret = 0; |
e334016f | 2793 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
225466f1 | 2794 | |
e334016f MH |
2795 | if (pkgs == NULL) |
2796 | return -ENOMEM; | |
4235b045 | 2797 | |
ee45b6c2 | 2798 | ret = init_symbol_maps(pevs->uprobes); |
449e5b24 MH |
2799 | if (ret < 0) { |
2800 | free(pkgs); | |
146a1439 | 2801 | return ret; |
449e5b24 | 2802 | } |
4235b045 MH |
2803 | |
2804 | /* Loop 1: convert all events */ | |
2805 | for (i = 0; i < npevs; i++) { | |
2806 | pkgs[i].pev = &pevs[i]; | |
b031220d MH |
2807 | /* Init kprobe blacklist if needed */ |
2808 | if (!pkgs[i].pev->uprobes) | |
2809 | kprobe_blacklist__init(); | |
4235b045 | 2810 | /* Convert with or without debuginfo */ |
0e60836b | 2811 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
ddb2f58f | 2812 | &pkgs[i].tevs); |
146a1439 MH |
2813 | if (ret < 0) |
2814 | goto end; | |
2815 | pkgs[i].ntevs = ret; | |
e0faa8d3 | 2816 | } |
b031220d MH |
2817 | /* This just release blacklist only if allocated */ |
2818 | kprobe_blacklist__release(); | |
e0faa8d3 | 2819 | |
4235b045 | 2820 | /* Loop 2: add all events */ |
8635bf6e | 2821 | for (i = 0; i < npevs; i++) { |
0e60836b | 2822 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
ddb2f58f MH |
2823 | pkgs[i].ntevs, |
2824 | probe_conf.force_add); | |
fbee632d ACM |
2825 | if (ret < 0) |
2826 | break; | |
2827 | } | |
146a1439 | 2828 | end: |
449e5b24 MH |
2829 | /* Loop 3: cleanup and free trace events */ |
2830 | for (i = 0; i < npevs; i++) { | |
146a1439 | 2831 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 2832 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
74cf249d | 2833 | zfree(&pkgs[i].tevs); |
449e5b24 MH |
2834 | } |
2835 | free(pkgs); | |
ee45b6c2 | 2836 | exit_symbol_maps(); |
146a1439 MH |
2837 | |
2838 | return ret; | |
e0faa8d3 MH |
2839 | } |
2840 | ||
0e60836b | 2841 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
2842 | { |
2843 | char *p; | |
2844 | char buf[128]; | |
4235b045 | 2845 | int ret; |
bbbb521b | 2846 | |
0e60836b | 2847 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
2848 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
2849 | if (ret < 0) | |
2850 | goto error; | |
2851 | ||
bbbb521b | 2852 | p = strchr(buf + 2, ':'); |
146a1439 MH |
2853 | if (!p) { |
2854 | pr_debug("Internal error: %s should have ':' but not.\n", | |
2855 | ent->s); | |
2856 | ret = -ENOTSUP; | |
2857 | goto error; | |
2858 | } | |
bbbb521b MH |
2859 | *p = '/'; |
2860 | ||
4235b045 MH |
2861 | pr_debug("Writing event: %s\n", buf); |
2862 | ret = write(fd, buf, strlen(buf)); | |
44a56040 MH |
2863 | if (ret < 0) { |
2864 | ret = -errno; | |
146a1439 | 2865 | goto error; |
44a56040 | 2866 | } |
146a1439 | 2867 | |
5e17b28f | 2868 | pr_info("Removed event: %s\n", ent->s); |
146a1439 MH |
2869 | return 0; |
2870 | error: | |
5f03cba4 MH |
2871 | pr_warning("Failed to delete event: %s\n", |
2872 | strerror_r(-ret, buf, sizeof(buf))); | |
146a1439 | 2873 | return ret; |
bbbb521b MH |
2874 | } |
2875 | ||
307a464b MH |
2876 | static int del_trace_probe_events(int fd, struct strfilter *filter, |
2877 | struct strlist *namelist) | |
fa28244d | 2878 | { |
307a464b MH |
2879 | struct str_node *ent; |
2880 | const char *p; | |
6dbe31f7 | 2881 | int ret = -ENOENT; |
fa28244d | 2882 | |
307a464b MH |
2883 | if (!namelist) |
2884 | return -ENOENT; | |
2885 | ||
2886 | strlist__for_each(ent, namelist) { | |
2887 | p = strchr(ent->s, ':'); | |
2888 | if ((p && strfilter__compare(filter, p + 1)) || | |
2889 | strfilter__compare(filter, ent->s)) { | |
0e60836b | 2890 | ret = __del_trace_probe_event(fd, ent); |
307a464b MH |
2891 | if (ret < 0) |
2892 | break; | |
bbbb521b MH |
2893 | } |
2894 | } | |
146a1439 MH |
2895 | |
2896 | return ret; | |
fa28244d MH |
2897 | } |
2898 | ||
307a464b | 2899 | int del_perf_probe_events(struct strfilter *filter) |
fa28244d | 2900 | { |
307a464b | 2901 | int ret, ret2, ufd = -1, kfd = -1; |
225466f1 | 2902 | struct strlist *namelist = NULL, *unamelist = NULL; |
307a464b MH |
2903 | char *str = strfilter__string(filter); |
2904 | ||
2905 | if (!str) | |
2906 | return -EINVAL; | |
2907 | ||
2908 | pr_debug("Delete filter: \'%s\'\n", str); | |
146a1439 | 2909 | |
fa28244d | 2910 | /* Get current event names */ |
225466f1 | 2911 | kfd = open_kprobe_events(true); |
467ec085 MH |
2912 | if (kfd >= 0) |
2913 | namelist = get_probe_trace_event_names(kfd, true); | |
225466f1 | 2914 | |
225466f1 | 2915 | ufd = open_uprobe_events(true); |
467ec085 | 2916 | if (ufd >= 0) |
225466f1 SD |
2917 | unamelist = get_probe_trace_event_names(ufd, true); |
2918 | ||
467ec085 MH |
2919 | if (kfd < 0 && ufd < 0) { |
2920 | print_both_open_warning(kfd, ufd); | |
307a464b | 2921 | ret = kfd; |
467ec085 MH |
2922 | goto error; |
2923 | } | |
2924 | ||
307a464b MH |
2925 | ret = del_trace_probe_events(kfd, filter, namelist); |
2926 | if (ret < 0 && ret != -ENOENT) | |
225466f1 | 2927 | goto error; |
225466f1 | 2928 | |
307a464b | 2929 | ret2 = del_trace_probe_events(ufd, filter, unamelist); |
dddc7ee3 | 2930 | if (ret2 < 0 && ret2 != -ENOENT) { |
307a464b | 2931 | ret = ret2; |
dddc7ee3 MH |
2932 | goto error; |
2933 | } | |
2934 | if (ret == -ENOENT && ret2 == -ENOENT) | |
307a464b MH |
2935 | pr_debug("\"%s\" does not hit any event.\n", str); |
2936 | /* Note that this is silently ignored */ | |
dddc7ee3 | 2937 | ret = 0; |
225466f1 SD |
2938 | |
2939 | error: | |
2940 | if (kfd >= 0) { | |
a23c4dc4 | 2941 | strlist__delete(namelist); |
225466f1 SD |
2942 | close(kfd); |
2943 | } | |
2944 | ||
2945 | if (ufd >= 0) { | |
a23c4dc4 | 2946 | strlist__delete(unamelist); |
225466f1 SD |
2947 | close(ufd); |
2948 | } | |
307a464b | 2949 | free(str); |
146a1439 MH |
2950 | |
2951 | return ret; | |
fa28244d | 2952 | } |
225466f1 | 2953 | |
3c42258c MH |
2954 | /* TODO: don't use a global variable for filter ... */ |
2955 | static struct strfilter *available_func_filter; | |
fa28244d | 2956 | |
e80711ca | 2957 | /* |
3c42258c MH |
2958 | * If a symbol corresponds to a function with global binding and |
2959 | * matches filter return 0. For all others return 1. | |
e80711ca | 2960 | */ |
1d037ca1 | 2961 | static int filter_available_functions(struct map *map __maybe_unused, |
3c42258c | 2962 | struct symbol *sym) |
e80711ca | 2963 | { |
e578da3b | 2964 | if (strfilter__compare(available_func_filter, sym->name)) |
3c42258c MH |
2965 | return 0; |
2966 | return 1; | |
e80711ca MH |
2967 | } |
2968 | ||
2df58634 MH |
2969 | int show_available_funcs(const char *target, struct strfilter *_filter, |
2970 | bool user) | |
e80711ca MH |
2971 | { |
2972 | struct map *map; | |
2973 | int ret; | |
2974 | ||
2df58634 | 2975 | ret = init_symbol_maps(user); |
e80711ca MH |
2976 | if (ret < 0) |
2977 | return ret; | |
2978 | ||
2df58634 MH |
2979 | /* Get a symbol map */ |
2980 | if (user) | |
2981 | map = dso__new_map(target); | |
2982 | else | |
2983 | map = kernel_get_module_map(target); | |
e80711ca | 2984 | if (!map) { |
2df58634 | 2985 | pr_err("Failed to get a map for %s\n", (target) ? : "kernel"); |
e80711ca MH |
2986 | return -EINVAL; |
2987 | } | |
225466f1 | 2988 | |
2df58634 | 2989 | /* Load symbols with given filter */ |
3c42258c | 2990 | available_func_filter = _filter; |
2df58634 MH |
2991 | if (map__load(map, filter_available_functions)) { |
2992 | pr_err("Failed to load symbols in %s\n", (target) ? : "kernel"); | |
2993 | goto end; | |
2994 | } | |
2995 | if (!dso__sorted_by_name(map->dso, map->type)) | |
2996 | dso__sort_by_name(map->dso, map->type); | |
225466f1 | 2997 | |
2df58634 MH |
2998 | /* Show all (filtered) symbols */ |
2999 | setup_pager(); | |
3000 | dso__fprintf_symbols_by_name(map->dso, map->type, stdout); | |
3001 | end: | |
3002 | if (user) { | |
84c2cafa | 3003 | map__put(map); |
2df58634 MH |
3004 | } |
3005 | exit_symbol_maps(); | |
225466f1 | 3006 | |
2df58634 | 3007 | return ret; |
225466f1 SD |
3008 | } |
3009 |