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Commit | Line | Data |
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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" | |
4605eab3 | 43 | #include <api/fs/fs.h> |
1d037ca1 | 44 | #include "trace-event.h" /* For __maybe_unused */ |
50656eec | 45 | #include "probe-event.h" |
4235b045 | 46 | #include "probe-finder.h" |
92f6c72e | 47 | #include "probe-file.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 | |
92f6c72e | 58 | int e_snprintf(char *str, size_t size, const char *format, ...) |
4de189fe MH |
59 | { |
60 | int ret; | |
61 | va_list ap; | |
62 | va_start(ap, format); | |
63 | ret = vsnprintf(str, size, format, ap); | |
64 | va_end(ap); | |
65 | if (ret >= (int)size) | |
66 | ret = -E2BIG; | |
67 | return ret; | |
68 | } | |
69 | ||
ee45b6c2 | 70 | static struct machine *host_machine; |
e0faa8d3 | 71 | |
469b9b88 | 72 | /* Initialize symbol maps and path of vmlinux/modules */ |
9bae1e8c | 73 | int init_probe_symbol_maps(bool user_only) |
e0faa8d3 | 74 | { |
146a1439 MH |
75 | int ret; |
76 | ||
e0faa8d3 | 77 | symbol_conf.sort_by_name = true; |
680d926a | 78 | symbol_conf.allow_aliases = true; |
0a7e6d1b | 79 | ret = symbol__init(NULL); |
146a1439 MH |
80 | if (ret < 0) { |
81 | pr_debug("Failed to init symbol map.\n"); | |
82 | goto out; | |
83 | } | |
e0faa8d3 | 84 | |
ee45b6c2 MH |
85 | if (host_machine || user_only) /* already initialized */ |
86 | return 0; | |
d28c6223 | 87 | |
ee45b6c2 MH |
88 | if (symbol_conf.vmlinux_name) |
89 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
90 | ||
91 | host_machine = machine__new_host(); | |
92 | if (!host_machine) { | |
93 | pr_debug("machine__new_host() failed.\n"); | |
94 | symbol__exit(); | |
95 | ret = -1; | |
469b9b88 | 96 | } |
146a1439 MH |
97 | out: |
98 | if (ret < 0) | |
99 | pr_warning("Failed to init vmlinux path.\n"); | |
100 | return ret; | |
e0faa8d3 MH |
101 | } |
102 | ||
9bae1e8c | 103 | void exit_probe_symbol_maps(void) |
ee45b6c2 | 104 | { |
32ca678d ACM |
105 | machine__delete(host_machine); |
106 | host_machine = NULL; | |
ee45b6c2 MH |
107 | symbol__exit(); |
108 | } | |
109 | ||
469b9b88 MH |
110 | static struct symbol *__find_kernel_function_by_name(const char *name, |
111 | struct map **mapp) | |
112 | { | |
ee45b6c2 | 113 | return machine__find_kernel_function_by_name(host_machine, name, mapp, |
469b9b88 MH |
114 | NULL); |
115 | } | |
116 | ||
8f33f7de MH |
117 | static struct symbol *__find_kernel_function(u64 addr, struct map **mapp) |
118 | { | |
119 | return machine__find_kernel_function(host_machine, addr, mapp, NULL); | |
120 | } | |
121 | ||
122 | static struct ref_reloc_sym *kernel_get_ref_reloc_sym(void) | |
123 | { | |
124 | /* kmap->ref_reloc_sym should be set if host_machine is initialized */ | |
125 | struct kmap *kmap; | |
a5e813c6 | 126 | struct map *map = machine__kernel_map(host_machine); |
8f33f7de | 127 | |
77e65977 | 128 | if (map__load(map, NULL) < 0) |
8f33f7de MH |
129 | return NULL; |
130 | ||
77e65977 | 131 | kmap = map__kmap(map); |
ba92732e WN |
132 | if (!kmap) |
133 | return NULL; | |
8f33f7de MH |
134 | return kmap->ref_reloc_sym; |
135 | } | |
136 | ||
9b239a12 MH |
137 | static int kernel_get_symbol_address_by_name(const char *name, u64 *addr, |
138 | bool reloc, bool reladdr) | |
8f33f7de MH |
139 | { |
140 | struct ref_reloc_sym *reloc_sym; | |
141 | struct symbol *sym; | |
142 | struct map *map; | |
143 | ||
144 | /* ref_reloc_sym is just a label. Need a special fix*/ | |
145 | reloc_sym = kernel_get_ref_reloc_sym(); | |
146 | if (reloc_sym && strcmp(name, reloc_sym->name) == 0) | |
9b239a12 | 147 | *addr = (reloc) ? reloc_sym->addr : reloc_sym->unrelocated_addr; |
8f33f7de MH |
148 | else { |
149 | sym = __find_kernel_function_by_name(name, &map); | |
9b239a12 MH |
150 | if (!sym) |
151 | return -ENOENT; | |
152 | *addr = map->unmap_ip(map, sym->start) - | |
153 | ((reloc) ? 0 : map->reloc) - | |
154 | ((reladdr) ? map->start : 0); | |
8f33f7de MH |
155 | } |
156 | return 0; | |
157 | } | |
158 | ||
e80711ca MH |
159 | static struct map *kernel_get_module_map(const char *module) |
160 | { | |
ee45b6c2 | 161 | struct map_groups *grp = &host_machine->kmaps; |
1eee78ae | 162 | struct maps *maps = &grp->maps[MAP__FUNCTION]; |
4bb7123d | 163 | struct map *pos; |
e80711ca | 164 | |
14a8fd7c MH |
165 | /* A file path -- this is an offline module */ |
166 | if (module && strchr(module, '/')) | |
9f2de315 | 167 | return machine__findnew_module_map(host_machine, 0, module); |
14a8fd7c | 168 | |
e80711ca MH |
169 | if (!module) |
170 | module = "kernel"; | |
171 | ||
4bb7123d | 172 | for (pos = maps__first(maps); pos; pos = map__next(pos)) { |
cb3f3378 | 173 | /* short_name is "[module]" */ |
e80711ca | 174 | if (strncmp(pos->dso->short_name + 1, module, |
cb3f3378 KK |
175 | pos->dso->short_name_len - 2) == 0 && |
176 | module[pos->dso->short_name_len - 2] == '\0') { | |
e80711ca MH |
177 | return pos; |
178 | } | |
179 | } | |
180 | return NULL; | |
181 | } | |
182 | ||
99e608b5 | 183 | struct map *get_target_map(const char *target, bool user) |
9b118aca MH |
184 | { |
185 | /* Init maps of given executable or kernel */ | |
186 | if (user) | |
187 | return dso__new_map(target); | |
188 | else | |
189 | return kernel_get_module_map(target); | |
190 | } | |
191 | ||
192 | static void put_target_map(struct map *map, bool user) | |
193 | { | |
194 | if (map && user) { | |
195 | /* Only the user map needs to be released */ | |
84c2cafa | 196 | map__put(map); |
9b118aca MH |
197 | } |
198 | } | |
199 | ||
200 | ||
fb7345bb MH |
201 | static int convert_exec_to_group(const char *exec, char **result) |
202 | { | |
203 | char *ptr1, *ptr2, *exec_copy; | |
204 | char buf[64]; | |
205 | int ret; | |
206 | ||
207 | exec_copy = strdup(exec); | |
208 | if (!exec_copy) | |
209 | return -ENOMEM; | |
210 | ||
211 | ptr1 = basename(exec_copy); | |
212 | if (!ptr1) { | |
213 | ret = -EINVAL; | |
214 | goto out; | |
215 | } | |
216 | ||
217 | ptr2 = strpbrk(ptr1, "-._"); | |
218 | if (ptr2) | |
219 | *ptr2 = '\0'; | |
220 | ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1); | |
221 | if (ret < 0) | |
222 | goto out; | |
223 | ||
224 | *result = strdup(buf); | |
225 | ret = *result ? 0 : -ENOMEM; | |
226 | ||
227 | out: | |
228 | free(exec_copy); | |
229 | return ret; | |
230 | } | |
231 | ||
9b118aca MH |
232 | static void clear_perf_probe_point(struct perf_probe_point *pp) |
233 | { | |
234 | free(pp->file); | |
235 | free(pp->function); | |
236 | free(pp->lazy_line); | |
237 | } | |
238 | ||
eb948e50 MH |
239 | static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs) |
240 | { | |
241 | int i; | |
242 | ||
243 | for (i = 0; i < ntevs; i++) | |
244 | clear_probe_trace_event(tevs + i); | |
245 | } | |
246 | ||
b031220d MH |
247 | static bool kprobe_blacklist__listed(unsigned long address); |
248 | static bool kprobe_warn_out_range(const char *symbol, unsigned long address) | |
249 | { | |
9b239a12 MH |
250 | u64 etext_addr = 0; |
251 | int ret; | |
7c31bb8c | 252 | |
b031220d | 253 | /* Get the address of _etext for checking non-probable text symbol */ |
9b239a12 MH |
254 | ret = kernel_get_symbol_address_by_name("_etext", &etext_addr, |
255 | false, false); | |
7c31bb8c | 256 | |
9b239a12 | 257 | if (ret == 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 | ||
c61fb959 RB |
267 | /* |
268 | * NOTE: | |
269 | * '.gnu.linkonce.this_module' section of kernel module elf directly | |
270 | * maps to 'struct module' from linux/module.h. This section contains | |
271 | * actual module name which will be used by kernel after loading it. | |
272 | * But, we cannot use 'struct module' here since linux/module.h is not | |
273 | * exposed to user-space. Offset of 'name' has remained same from long | |
274 | * time, so hardcoding it here. | |
275 | */ | |
276 | #ifdef __LP64__ | |
277 | #define MOD_NAME_OFFSET 24 | |
278 | #else | |
279 | #define MOD_NAME_OFFSET 12 | |
280 | #endif | |
281 | ||
282 | /* | |
283 | * @module can be module name of module file path. In case of path, | |
284 | * inspect elf and find out what is actual module name. | |
285 | * Caller has to free mod_name after using it. | |
286 | */ | |
287 | static char *find_module_name(const char *module) | |
288 | { | |
289 | int fd; | |
290 | Elf *elf; | |
291 | GElf_Ehdr ehdr; | |
292 | GElf_Shdr shdr; | |
293 | Elf_Data *data; | |
294 | Elf_Scn *sec; | |
295 | char *mod_name = NULL; | |
296 | ||
297 | fd = open(module, O_RDONLY); | |
298 | if (fd < 0) | |
299 | return NULL; | |
300 | ||
301 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
302 | if (elf == NULL) | |
303 | goto elf_err; | |
304 | ||
305 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
306 | goto ret_err; | |
307 | ||
308 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
309 | ".gnu.linkonce.this_module", NULL); | |
310 | if (!sec) | |
311 | goto ret_err; | |
312 | ||
313 | data = elf_getdata(sec, NULL); | |
314 | if (!data || !data->d_buf) | |
315 | goto ret_err; | |
316 | ||
317 | mod_name = strdup((char *)data->d_buf + MOD_NAME_OFFSET); | |
318 | ||
319 | ret_err: | |
320 | elf_end(elf); | |
321 | elf_err: | |
322 | close(fd); | |
323 | return mod_name; | |
324 | } | |
325 | ||
89fe808a | 326 | #ifdef HAVE_DWARF_SUPPORT |
60fb7742 WN |
327 | |
328 | static int kernel_get_module_dso(const char *module, struct dso **pdso) | |
329 | { | |
330 | struct dso *dso; | |
331 | struct map *map; | |
332 | const char *vmlinux_name; | |
333 | int ret = 0; | |
334 | ||
335 | if (module) { | |
266fa2b2 ACM |
336 | char module_name[128]; |
337 | ||
338 | snprintf(module_name, sizeof(module_name), "[%s]", module); | |
339 | map = map_groups__find_by_name(&host_machine->kmaps, MAP__FUNCTION, module_name); | |
340 | if (map) { | |
341 | dso = map->dso; | |
342 | goto found; | |
60fb7742 WN |
343 | } |
344 | pr_debug("Failed to find module %s.\n", module); | |
345 | return -ENOENT; | |
346 | } | |
347 | ||
a5e813c6 | 348 | map = machine__kernel_map(host_machine); |
60fb7742 WN |
349 | dso = map->dso; |
350 | ||
351 | vmlinux_name = symbol_conf.vmlinux_name; | |
352 | dso->load_errno = 0; | |
353 | if (vmlinux_name) | |
354 | ret = dso__load_vmlinux(dso, map, vmlinux_name, false, NULL); | |
355 | else | |
356 | ret = dso__load_vmlinux_path(dso, map, NULL); | |
357 | found: | |
358 | *pdso = dso; | |
359 | return ret; | |
360 | } | |
361 | ||
9b118aca MH |
362 | /* |
363 | * Some binaries like glibc have special symbols which are on the symbol | |
364 | * table, but not in the debuginfo. If we can find the address of the | |
365 | * symbol from map, we can translate the address back to the probe point. | |
366 | */ | |
367 | static int find_alternative_probe_point(struct debuginfo *dinfo, | |
368 | struct perf_probe_point *pp, | |
369 | struct perf_probe_point *result, | |
370 | const char *target, bool uprobes) | |
371 | { | |
372 | struct map *map = NULL; | |
373 | struct symbol *sym; | |
374 | u64 address = 0; | |
375 | int ret = -ENOENT; | |
376 | ||
377 | /* This can work only for function-name based one */ | |
378 | if (!pp->function || pp->file) | |
379 | return -ENOTSUP; | |
380 | ||
381 | map = get_target_map(target, uprobes); | |
382 | if (!map) | |
383 | return -EINVAL; | |
384 | ||
385 | /* Find the address of given function */ | |
386 | map__for_each_symbol_by_name(map, pp->function, sym) { | |
e6d7c91c MH |
387 | if (uprobes) |
388 | address = sym->start; | |
389 | else | |
8e34189b | 390 | address = map->unmap_ip(map, sym->start) - map->reloc; |
e578da3b | 391 | break; |
9b118aca MH |
392 | } |
393 | if (!address) { | |
394 | ret = -ENOENT; | |
395 | goto out; | |
396 | } | |
f6c15621 WN |
397 | pr_debug("Symbol %s address found : %" PRIx64 "\n", |
398 | pp->function, address); | |
9b118aca MH |
399 | |
400 | ret = debuginfo__find_probe_point(dinfo, (unsigned long)address, | |
401 | result); | |
402 | if (ret <= 0) | |
403 | ret = (!ret) ? -ENOENT : ret; | |
404 | else { | |
405 | result->offset += pp->offset; | |
406 | result->line += pp->line; | |
9d7b45c5 | 407 | result->retprobe = pp->retprobe; |
9b118aca MH |
408 | ret = 0; |
409 | } | |
410 | ||
411 | out: | |
412 | put_target_map(map, uprobes); | |
413 | return ret; | |
414 | ||
415 | } | |
416 | ||
417 | static int get_alternative_probe_event(struct debuginfo *dinfo, | |
418 | struct perf_probe_event *pev, | |
44225521 | 419 | struct perf_probe_point *tmp) |
9b118aca MH |
420 | { |
421 | int ret; | |
422 | ||
423 | memcpy(tmp, &pev->point, sizeof(*tmp)); | |
424 | memset(&pev->point, 0, sizeof(pev->point)); | |
425 | ret = find_alternative_probe_point(dinfo, tmp, &pev->point, | |
44225521 | 426 | pev->target, pev->uprobes); |
9b118aca MH |
427 | if (ret < 0) |
428 | memcpy(&pev->point, tmp, sizeof(*tmp)); | |
429 | ||
430 | return ret; | |
431 | } | |
a15ad2f5 | 432 | |
811dd2ae MH |
433 | static int get_alternative_line_range(struct debuginfo *dinfo, |
434 | struct line_range *lr, | |
435 | const char *target, bool user) | |
436 | { | |
6d4a4896 DA |
437 | struct perf_probe_point pp = { .function = lr->function, |
438 | .file = lr->file, | |
439 | .line = lr->start }; | |
440 | struct perf_probe_point result; | |
811dd2ae MH |
441 | int ret, len = 0; |
442 | ||
6d4a4896 DA |
443 | memset(&result, 0, sizeof(result)); |
444 | ||
811dd2ae MH |
445 | if (lr->end != INT_MAX) |
446 | len = lr->end - lr->start; | |
447 | ret = find_alternative_probe_point(dinfo, &pp, &result, | |
448 | target, user); | |
449 | if (!ret) { | |
450 | lr->function = result.function; | |
451 | lr->file = result.file; | |
452 | lr->start = result.line; | |
453 | if (lr->end != INT_MAX) | |
454 | lr->end = lr->start + len; | |
455 | clear_perf_probe_point(&pp); | |
456 | } | |
457 | return ret; | |
458 | } | |
459 | ||
ff741783 | 460 | /* Open new debuginfo of given module */ |
92561cb7 | 461 | static struct debuginfo *open_debuginfo(const char *module, bool silent) |
e0faa8d3 | 462 | { |
a15ad2f5 | 463 | const char *path = module; |
419e8738 MH |
464 | char reason[STRERR_BUFSIZE]; |
465 | struct debuginfo *ret = NULL; | |
466 | struct dso *dso = NULL; | |
467 | int err; | |
ff741783 | 468 | |
a15ad2f5 | 469 | if (!module || !strchr(module, '/')) { |
419e8738 MH |
470 | err = kernel_get_module_dso(module, &dso); |
471 | if (err < 0) { | |
472 | if (!dso || dso->load_errno == 0) { | |
c8b5f2c9 | 473 | if (!str_error_r(-err, reason, STRERR_BUFSIZE)) |
419e8738 MH |
474 | strcpy(reason, "(unknown)"); |
475 | } else | |
476 | dso__strerror_load(dso, reason, STRERR_BUFSIZE); | |
92561cb7 | 477 | if (!silent) |
419e8738 MH |
478 | pr_err("Failed to find the path for %s: %s\n", |
479 | module ?: "kernel", reason); | |
14a8fd7c MH |
480 | return NULL; |
481 | } | |
419e8738 | 482 | path = dso->long_name; |
e0faa8d3 | 483 | } |
92561cb7 MH |
484 | ret = debuginfo__new(path); |
485 | if (!ret && !silent) { | |
486 | pr_warning("The %s file has no debug information.\n", path); | |
487 | if (!module || !strtailcmp(path, ".ko")) | |
488 | pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, "); | |
489 | else | |
490 | pr_warning("Rebuild with -g, "); | |
491 | pr_warning("or install an appropriate debuginfo package.\n"); | |
492 | } | |
493 | return ret; | |
e0faa8d3 | 494 | } |
4b4da7f7 | 495 | |
7737af01 MH |
496 | /* For caching the last debuginfo */ |
497 | static struct debuginfo *debuginfo_cache; | |
498 | static char *debuginfo_cache_path; | |
499 | ||
500 | static struct debuginfo *debuginfo_cache__open(const char *module, bool silent) | |
501 | { | |
20f49859 MH |
502 | const char *path = module; |
503 | ||
504 | /* If the module is NULL, it should be the kernel. */ | |
505 | if (!module) | |
506 | path = "kernel"; | |
507 | ||
508 | if (debuginfo_cache_path && !strcmp(debuginfo_cache_path, path)) | |
7737af01 MH |
509 | goto out; |
510 | ||
511 | /* Copy module path */ | |
512 | free(debuginfo_cache_path); | |
20f49859 MH |
513 | debuginfo_cache_path = strdup(path); |
514 | if (!debuginfo_cache_path) { | |
515 | debuginfo__delete(debuginfo_cache); | |
516 | debuginfo_cache = NULL; | |
517 | goto out; | |
7737af01 MH |
518 | } |
519 | ||
520 | debuginfo_cache = open_debuginfo(module, silent); | |
521 | if (!debuginfo_cache) | |
522 | zfree(&debuginfo_cache_path); | |
523 | out: | |
524 | return debuginfo_cache; | |
525 | } | |
526 | ||
527 | static void debuginfo_cache__exit(void) | |
528 | { | |
529 | debuginfo__delete(debuginfo_cache); | |
530 | debuginfo_cache = NULL; | |
531 | zfree(&debuginfo_cache_path); | |
532 | } | |
533 | ||
92561cb7 | 534 | |
99ca4233 MH |
535 | static int get_text_start_address(const char *exec, unsigned long *address) |
536 | { | |
537 | Elf *elf; | |
538 | GElf_Ehdr ehdr; | |
539 | GElf_Shdr shdr; | |
540 | int fd, ret = -ENOENT; | |
541 | ||
542 | fd = open(exec, O_RDONLY); | |
543 | if (fd < 0) | |
544 | return -errno; | |
545 | ||
546 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
062d6c2a MH |
547 | if (elf == NULL) { |
548 | ret = -EINVAL; | |
549 | goto out_close; | |
550 | } | |
99ca4233 MH |
551 | |
552 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
553 | goto out; | |
554 | ||
555 | if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL)) | |
556 | goto out; | |
557 | ||
558 | *address = shdr.sh_addr - shdr.sh_offset; | |
559 | ret = 0; | |
560 | out: | |
561 | elf_end(elf); | |
062d6c2a MH |
562 | out_close: |
563 | close(fd); | |
564 | ||
99ca4233 MH |
565 | return ret; |
566 | } | |
567 | ||
5a6f6314 MH |
568 | /* |
569 | * Convert trace point to probe point with debuginfo | |
570 | */ | |
571 | static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp, | |
572 | struct perf_probe_point *pp, | |
573 | bool is_kprobe) | |
574 | { | |
575 | struct debuginfo *dinfo = NULL; | |
576 | unsigned long stext = 0; | |
577 | u64 addr = tp->address; | |
578 | int ret = -ENOENT; | |
579 | ||
580 | /* convert the address to dwarf address */ | |
581 | if (!is_kprobe) { | |
582 | if (!addr) { | |
583 | ret = -EINVAL; | |
584 | goto error; | |
585 | } | |
586 | ret = get_text_start_address(tp->module, &stext); | |
587 | if (ret < 0) | |
588 | goto error; | |
589 | addr += stext; | |
e486367f | 590 | } else if (tp->symbol) { |
9b239a12 MH |
591 | /* If the module is given, this returns relative address */ |
592 | ret = kernel_get_symbol_address_by_name(tp->symbol, &addr, | |
593 | false, !!tp->module); | |
594 | if (ret != 0) | |
5a6f6314 MH |
595 | goto error; |
596 | addr += tp->offset; | |
597 | } | |
598 | ||
599 | pr_debug("try to find information at %" PRIx64 " in %s\n", addr, | |
600 | tp->module ? : "kernel"); | |
601 | ||
7737af01 MH |
602 | dinfo = debuginfo_cache__open(tp->module, verbose == 0); |
603 | if (dinfo) | |
5a6f6314 MH |
604 | ret = debuginfo__find_probe_point(dinfo, |
605 | (unsigned long)addr, pp); | |
7737af01 | 606 | else |
5a6f6314 | 607 | ret = -ENOENT; |
5a6f6314 MH |
608 | |
609 | if (ret > 0) { | |
610 | pp->retprobe = tp->retprobe; | |
611 | return 0; | |
612 | } | |
613 | error: | |
614 | pr_debug("Failed to find corresponding probes from debuginfo.\n"); | |
615 | return ret ? : -ENOENT; | |
616 | } | |
617 | ||
fb7345bb MH |
618 | static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs, |
619 | int ntevs, const char *exec) | |
620 | { | |
621 | int i, ret = 0; | |
eb948e50 | 622 | unsigned long stext = 0; |
fb7345bb MH |
623 | |
624 | if (!exec) | |
625 | return 0; | |
626 | ||
627 | ret = get_text_start_address(exec, &stext); | |
628 | if (ret < 0) | |
629 | return ret; | |
630 | ||
631 | for (i = 0; i < ntevs && ret >= 0; i++) { | |
981a2379 | 632 | /* point.address is the addres of point.symbol + point.offset */ |
eb948e50 | 633 | tevs[i].point.address -= stext; |
fb7345bb | 634 | tevs[i].point.module = strdup(exec); |
eb948e50 | 635 | if (!tevs[i].point.module) { |
fb7345bb MH |
636 | ret = -ENOMEM; |
637 | break; | |
638 | } | |
639 | tevs[i].uprobes = true; | |
640 | } | |
641 | ||
642 | return ret; | |
643 | } | |
644 | ||
190b57fc MH |
645 | static int add_module_to_probe_trace_events(struct probe_trace_event *tevs, |
646 | int ntevs, const char *module) | |
647 | { | |
14a8fd7c | 648 | int i, ret = 0; |
63a29613 | 649 | char *mod_name = NULL; |
14a8fd7c MH |
650 | |
651 | if (!module) | |
652 | return 0; | |
653 | ||
63a29613 | 654 | mod_name = find_module_name(module); |
14a8fd7c | 655 | |
190b57fc | 656 | for (i = 0; i < ntevs; i++) { |
63a29613 RB |
657 | tevs[i].point.module = |
658 | strdup(mod_name ? mod_name : module); | |
14a8fd7c MH |
659 | if (!tevs[i].point.module) { |
660 | ret = -ENOMEM; | |
661 | break; | |
662 | } | |
190b57fc | 663 | } |
14a8fd7c | 664 | |
63a29613 | 665 | free(mod_name); |
14a8fd7c | 666 | return ret; |
190b57fc MH |
667 | } |
668 | ||
d820456d RB |
669 | static int |
670 | post_process_kernel_probe_trace_events(struct probe_trace_event *tevs, | |
671 | int ntevs) | |
dfef99cd MH |
672 | { |
673 | struct ref_reloc_sym *reloc_sym; | |
674 | char *tmp; | |
5a51fcd1 | 675 | int i, skipped = 0; |
dfef99cd | 676 | |
8f33f7de | 677 | reloc_sym = kernel_get_ref_reloc_sym(); |
dfef99cd MH |
678 | if (!reloc_sym) { |
679 | pr_warning("Relocated base symbol is not found!\n"); | |
680 | return -EINVAL; | |
681 | } | |
682 | ||
683 | for (i = 0; i < ntevs; i++) { | |
b031220d MH |
684 | if (!tevs[i].point.address || tevs[i].point.retprobe) |
685 | continue; | |
686 | /* If we found a wrong one, mark it by NULL symbol */ | |
687 | if (kprobe_warn_out_range(tevs[i].point.symbol, | |
688 | tevs[i].point.address)) { | |
689 | tmp = NULL; | |
690 | skipped++; | |
691 | } else { | |
692 | tmp = strdup(reloc_sym->name); | |
693 | if (!tmp) | |
694 | return -ENOMEM; | |
dfef99cd | 695 | } |
b031220d MH |
696 | /* If we have no realname, use symbol for it */ |
697 | if (!tevs[i].point.realname) | |
698 | tevs[i].point.realname = tevs[i].point.symbol; | |
699 | else | |
700 | free(tevs[i].point.symbol); | |
701 | tevs[i].point.symbol = tmp; | |
702 | tevs[i].point.offset = tevs[i].point.address - | |
703 | reloc_sym->unrelocated_addr; | |
dfef99cd | 704 | } |
5a51fcd1 | 705 | return skipped; |
dfef99cd MH |
706 | } |
707 | ||
99e608b5 RB |
708 | void __weak |
709 | arch__post_process_probe_trace_events(struct perf_probe_event *pev __maybe_unused, | |
710 | int ntevs __maybe_unused) | |
711 | { | |
712 | } | |
713 | ||
d820456d | 714 | /* Post processing the probe events */ |
99e608b5 RB |
715 | static int post_process_probe_trace_events(struct perf_probe_event *pev, |
716 | struct probe_trace_event *tevs, | |
d820456d RB |
717 | int ntevs, const char *module, |
718 | bool uprobe) | |
719 | { | |
99e608b5 | 720 | int ret; |
d820456d | 721 | |
99e608b5 RB |
722 | if (uprobe) |
723 | ret = add_exec_to_probe_trace_events(tevs, ntevs, module); | |
724 | else if (module) | |
d820456d | 725 | /* Currently ref_reloc_sym based probe is not for drivers */ |
99e608b5 RB |
726 | ret = add_module_to_probe_trace_events(tevs, ntevs, module); |
727 | else | |
728 | ret = post_process_kernel_probe_trace_events(tevs, ntevs); | |
d820456d | 729 | |
99e608b5 RB |
730 | if (ret >= 0) |
731 | arch__post_process_probe_trace_events(pev, ntevs); | |
732 | ||
733 | return ret; | |
d820456d RB |
734 | } |
735 | ||
4b4da7f7 | 736 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 737 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
ddb2f58f | 738 | struct probe_trace_event **tevs) |
4b4da7f7 MH |
739 | { |
740 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
9b118aca | 741 | struct perf_probe_point tmp; |
225466f1 | 742 | struct debuginfo *dinfo; |
190b57fc | 743 | int ntevs, ret = 0; |
4b4da7f7 | 744 | |
44225521 | 745 | dinfo = open_debuginfo(pev->target, !need_dwarf); |
ff741783 | 746 | if (!dinfo) { |
92561cb7 | 747 | if (need_dwarf) |
ff741783 | 748 | return -ENOENT; |
ff741783 | 749 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
750 | return 0; |
751 | } | |
752 | ||
dfef99cd | 753 | pr_debug("Try to find probe point from debuginfo.\n"); |
ff741783 | 754 | /* Searching trace events corresponding to a probe event */ |
ddb2f58f | 755 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs); |
ff741783 | 756 | |
9b118aca | 757 | if (ntevs == 0) { /* Not found, retry with an alternative */ |
44225521 | 758 | ret = get_alternative_probe_event(dinfo, pev, &tmp); |
9b118aca | 759 | if (!ret) { |
ddb2f58f | 760 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs); |
9b118aca MH |
761 | /* |
762 | * Write back to the original probe_event for | |
763 | * setting appropriate (user given) event name | |
764 | */ | |
765 | clear_perf_probe_point(&pev->point); | |
766 | memcpy(&pev->point, &tmp, sizeof(tmp)); | |
767 | } | |
768 | } | |
769 | ||
ff741783 | 770 | debuginfo__delete(dinfo); |
4b4da7f7 | 771 | |
146a1439 | 772 | if (ntevs > 0) { /* Succeeded to find trace events */ |
dfef99cd | 773 | pr_debug("Found %d probe_trace_events.\n", ntevs); |
99e608b5 | 774 | ret = post_process_probe_trace_events(pev, *tevs, ntevs, |
44225521 | 775 | pev->target, pev->uprobes); |
5a51fcd1 | 776 | if (ret < 0 || ret == ntevs) { |
981d05ad MH |
777 | clear_probe_trace_events(*tevs, ntevs); |
778 | zfree(tevs); | |
779 | } | |
5a51fcd1 MH |
780 | if (ret != ntevs) |
781 | return ret < 0 ? ret : ntevs; | |
782 | ntevs = 0; | |
783 | /* Fall through */ | |
146a1439 | 784 | } |
4b4da7f7 | 785 | |
146a1439 | 786 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
0687eba7 | 787 | pr_warning("Probe point '%s' not found.\n", |
146a1439 | 788 | synthesize_perf_probe_point(&pev->point)); |
0687eba7 | 789 | return -ENOENT; |
146a1439 MH |
790 | } |
791 | /* Error path : ntevs < 0 */ | |
15eca306 | 792 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
1c0bd0e8 WN |
793 | if (ntevs < 0) { |
794 | if (ntevs == -EBADF) | |
795 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
796 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
15eca306 | 797 | if (!need_dwarf) { |
0e43e5d2 | 798 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
799 | return 0; |
800 | } | |
4b4da7f7 | 801 | } |
15eca306 | 802 | return ntevs; |
4b4da7f7 MH |
803 | } |
804 | ||
805 | #define LINEBUF_SIZE 256 | |
806 | #define NR_ADDITIONAL_LINES 2 | |
807 | ||
fde52dbd | 808 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 | 809 | { |
5f03cba4 | 810 | char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE]; |
befe3414 FBH |
811 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
812 | const char *prefix = NULL; | |
4b4da7f7 | 813 | |
befe3414 | 814 | do { |
4b4da7f7 MH |
815 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
816 | goto error; | |
befe3414 FBH |
817 | if (skip) |
818 | continue; | |
819 | if (!prefix) { | |
820 | prefix = show_num ? "%7d " : " "; | |
821 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 822 | } |
befe3414 FBH |
823 | color_fprintf(stdout, color, "%s", buf); |
824 | ||
825 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 826 | |
fde52dbd | 827 | return 1; |
4b4da7f7 | 828 | error: |
fde52dbd | 829 | if (ferror(fp)) { |
5f03cba4 | 830 | pr_warning("File read error: %s\n", |
c8b5f2c9 | 831 | str_error_r(errno, sbuf, sizeof(sbuf))); |
fde52dbd FBH |
832 | return -1; |
833 | } | |
834 | return 0; | |
835 | } | |
146a1439 | 836 | |
fde52dbd FBH |
837 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
838 | { | |
839 | int rv = __show_one_line(fp, l, skip, show_num); | |
840 | if (rv == 0) { | |
841 | pr_warning("Source file is shorter than expected.\n"); | |
842 | rv = -1; | |
843 | } | |
844 | return rv; | |
4b4da7f7 MH |
845 | } |
846 | ||
fde52dbd FBH |
847 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
848 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
849 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
850 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
851 | ||
4b4da7f7 MH |
852 | /* |
853 | * Show line-range always requires debuginfo to find source file and | |
854 | * line number. | |
855 | */ | |
811dd2ae MH |
856 | static int __show_line_range(struct line_range *lr, const char *module, |
857 | bool user) | |
4b4da7f7 | 858 | { |
d3b63d7a | 859 | int l = 1; |
5a62257a | 860 | struct int_node *ln; |
ff741783 | 861 | struct debuginfo *dinfo; |
4b4da7f7 | 862 | FILE *fp; |
ff741783 | 863 | int ret; |
7cf0b79e | 864 | char *tmp; |
5f03cba4 | 865 | char sbuf[STRERR_BUFSIZE]; |
4b4da7f7 MH |
866 | |
867 | /* Search a line range */ | |
92561cb7 MH |
868 | dinfo = open_debuginfo(module, false); |
869 | if (!dinfo) | |
ff741783 | 870 | return -ENOENT; |
146a1439 | 871 | |
ff741783 | 872 | ret = debuginfo__find_line_range(dinfo, lr); |
811dd2ae MH |
873 | if (!ret) { /* Not found, retry with an alternative */ |
874 | ret = get_alternative_line_range(dinfo, lr, module, user); | |
875 | if (!ret) | |
876 | ret = debuginfo__find_line_range(dinfo, lr); | |
877 | } | |
ff741783 | 878 | debuginfo__delete(dinfo); |
5ee05b88 | 879 | if (ret == 0 || ret == -ENOENT) { |
146a1439 MH |
880 | pr_warning("Specified source line is not found.\n"); |
881 | return -ENOENT; | |
882 | } else if (ret < 0) { | |
5ee05b88 | 883 | pr_warning("Debuginfo analysis failed.\n"); |
146a1439 MH |
884 | return ret; |
885 | } | |
4b4da7f7 | 886 | |
7cf0b79e MH |
887 | /* Convert source file path */ |
888 | tmp = lr->path; | |
6a330a3c | 889 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
a78604de HK |
890 | |
891 | /* Free old path when new path is assigned */ | |
892 | if (tmp != lr->path) | |
893 | free(tmp); | |
894 | ||
7cf0b79e | 895 | if (ret < 0) { |
5ee05b88 | 896 | pr_warning("Failed to find source file path.\n"); |
7cf0b79e MH |
897 | return ret; |
898 | } | |
899 | ||
4b4da7f7 MH |
900 | setup_pager(); |
901 | ||
902 | if (lr->function) | |
8737ebde | 903 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
904 | lr->start - lr->offset); |
905 | else | |
62c15fc4 | 906 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
907 | |
908 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
909 | if (fp == NULL) { |
910 | pr_warning("Failed to open %s: %s\n", lr->path, | |
c8b5f2c9 | 911 | str_error_r(errno, sbuf, sizeof(sbuf))); |
146a1439 MH |
912 | return -errno; |
913 | } | |
4b4da7f7 | 914 | /* Skip to starting line number */ |
44b81e92 | 915 | while (l < lr->start) { |
fde52dbd | 916 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
917 | if (ret < 0) |
918 | goto end; | |
919 | } | |
4b4da7f7 | 920 | |
10daf4d0 | 921 | intlist__for_each_entry(ln, lr->line_list) { |
5a62257a | 922 | for (; ln->i > l; l++) { |
fde52dbd | 923 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
924 | if (ret < 0) |
925 | goto end; | |
926 | } | |
fde52dbd | 927 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
928 | if (ret < 0) |
929 | goto end; | |
4b4da7f7 MH |
930 | } |
931 | ||
932 | if (lr->end == INT_MAX) | |
933 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
934 | while (l <= lr->end) { |
935 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
936 | if (ret <= 0) | |
44b81e92 FBH |
937 | break; |
938 | } | |
146a1439 | 939 | end: |
4b4da7f7 | 940 | fclose(fp); |
146a1439 | 941 | return ret; |
4b4da7f7 MH |
942 | } |
943 | ||
2b394bc4 | 944 | int show_line_range(struct line_range *lr, const char *module, bool user) |
ee45b6c2 MH |
945 | { |
946 | int ret; | |
947 | ||
9bae1e8c | 948 | ret = init_probe_symbol_maps(user); |
ee45b6c2 MH |
949 | if (ret < 0) |
950 | return ret; | |
811dd2ae | 951 | ret = __show_line_range(lr, module, user); |
9bae1e8c | 952 | exit_probe_symbol_maps(); |
ee45b6c2 MH |
953 | |
954 | return ret; | |
955 | } | |
956 | ||
ff741783 MH |
957 | static int show_available_vars_at(struct debuginfo *dinfo, |
958 | struct perf_probe_event *pev, | |
ddb2f58f | 959 | struct strfilter *_filter) |
cf6eb489 MH |
960 | { |
961 | char *buf; | |
bd09d7b5 | 962 | int ret, i, nvars; |
cf6eb489 MH |
963 | struct str_node *node; |
964 | struct variable_list *vls = NULL, *vl; | |
9b118aca | 965 | struct perf_probe_point tmp; |
bd09d7b5 | 966 | const char *var; |
cf6eb489 MH |
967 | |
968 | buf = synthesize_perf_probe_point(&pev->point); | |
969 | if (!buf) | |
970 | return -EINVAL; | |
971 | pr_debug("Searching variables at %s\n", buf); | |
972 | ||
ddb2f58f | 973 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls); |
9b118aca | 974 | if (!ret) { /* Not found, retry with an alternative */ |
44225521 | 975 | ret = get_alternative_probe_event(dinfo, pev, &tmp); |
9b118aca MH |
976 | if (!ret) { |
977 | ret = debuginfo__find_available_vars_at(dinfo, pev, | |
ddb2f58f | 978 | &vls); |
9b118aca MH |
979 | /* Release the old probe_point */ |
980 | clear_perf_probe_point(&tmp); | |
981 | } | |
982 | } | |
bd09d7b5 | 983 | if (ret <= 0) { |
69e96eaa MH |
984 | if (ret == 0 || ret == -ENOENT) { |
985 | pr_err("Failed to find the address of %s\n", buf); | |
986 | ret = -ENOENT; | |
987 | } else | |
988 | pr_warning("Debuginfo analysis failed.\n"); | |
bd09d7b5 MH |
989 | goto end; |
990 | } | |
69e96eaa | 991 | |
bd09d7b5 MH |
992 | /* Some variables are found */ |
993 | fprintf(stdout, "Available variables at %s\n", buf); | |
994 | for (i = 0; i < ret; i++) { | |
995 | vl = &vls[i]; | |
996 | /* | |
997 | * A probe point might be converted to | |
998 | * several trace points. | |
999 | */ | |
1000 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
1001 | vl->point.offset); | |
74cf249d | 1002 | zfree(&vl->point.symbol); |
bd09d7b5 MH |
1003 | nvars = 0; |
1004 | if (vl->vars) { | |
602a1f4d | 1005 | strlist__for_each_entry(node, vl->vars) { |
bd09d7b5 MH |
1006 | var = strchr(node->s, '\t') + 1; |
1007 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 1008 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
1009 | nvars++; |
1010 | } | |
1011 | } | |
1012 | strlist__delete(vl->vars); | |
cf6eb489 | 1013 | } |
bd09d7b5 MH |
1014 | if (nvars == 0) |
1015 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
1016 | } | |
1017 | free(vls); | |
1018 | end: | |
cf6eb489 MH |
1019 | free(buf); |
1020 | return ret; | |
1021 | } | |
1022 | ||
1023 | /* Show available variables on given probe point */ | |
1024 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
ddb2f58f | 1025 | struct strfilter *_filter) |
cf6eb489 | 1026 | { |
ff741783 MH |
1027 | int i, ret = 0; |
1028 | struct debuginfo *dinfo; | |
cf6eb489 | 1029 | |
9bae1e8c | 1030 | ret = init_probe_symbol_maps(pevs->uprobes); |
cf6eb489 MH |
1031 | if (ret < 0) |
1032 | return ret; | |
1033 | ||
44225521 | 1034 | dinfo = open_debuginfo(pevs->target, false); |
ff741783 | 1035 | if (!dinfo) { |
ee45b6c2 MH |
1036 | ret = -ENOENT; |
1037 | goto out; | |
ff741783 MH |
1038 | } |
1039 | ||
cf6eb489 MH |
1040 | setup_pager(); |
1041 | ||
ff741783 | 1042 | for (i = 0; i < npevs && ret >= 0; i++) |
ddb2f58f | 1043 | ret = show_available_vars_at(dinfo, &pevs[i], _filter); |
ff741783 MH |
1044 | |
1045 | debuginfo__delete(dinfo); | |
ee45b6c2 | 1046 | out: |
9bae1e8c | 1047 | exit_probe_symbol_maps(); |
cf6eb489 MH |
1048 | return ret; |
1049 | } | |
1050 | ||
89fe808a | 1051 | #else /* !HAVE_DWARF_SUPPORT */ |
4b4da7f7 | 1052 | |
7737af01 MH |
1053 | static void debuginfo_cache__exit(void) |
1054 | { | |
1055 | } | |
1056 | ||
5a6f6314 MH |
1057 | static int |
1058 | find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused, | |
1059 | struct perf_probe_point *pp __maybe_unused, | |
1060 | bool is_kprobe __maybe_unused) | |
4b4da7f7 | 1061 | { |
5a6f6314 | 1062 | return -ENOSYS; |
4b4da7f7 MH |
1063 | } |
1064 | ||
0e60836b | 1065 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
ddb2f58f | 1066 | struct probe_trace_event **tevs __maybe_unused) |
4b4da7f7 | 1067 | { |
146a1439 MH |
1068 | if (perf_probe_event_need_dwarf(pev)) { |
1069 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
1070 | return -ENOSYS; | |
1071 | } | |
225466f1 | 1072 | |
4b4da7f7 MH |
1073 | return 0; |
1074 | } | |
1075 | ||
1d037ca1 | 1076 | int show_line_range(struct line_range *lr __maybe_unused, |
2b394bc4 MH |
1077 | const char *module __maybe_unused, |
1078 | bool user __maybe_unused) | |
4b4da7f7 | 1079 | { |
146a1439 MH |
1080 | pr_warning("Debuginfo-analysis is not supported.\n"); |
1081 | return -ENOSYS; | |
4b4da7f7 MH |
1082 | } |
1083 | ||
1d037ca1 | 1084 | int show_available_vars(struct perf_probe_event *pevs __maybe_unused, |
ddb2f58f MH |
1085 | int npevs __maybe_unused, |
1086 | struct strfilter *filter __maybe_unused) | |
cf6eb489 MH |
1087 | { |
1088 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
1089 | return -ENOSYS; | |
1090 | } | |
e0faa8d3 MH |
1091 | #endif |
1092 | ||
e53b00d3 MH |
1093 | void line_range__clear(struct line_range *lr) |
1094 | { | |
e53b00d3 MH |
1095 | free(lr->function); |
1096 | free(lr->file); | |
1097 | free(lr->path); | |
1098 | free(lr->comp_dir); | |
5a62257a | 1099 | intlist__delete(lr->line_list); |
e53b00d3 MH |
1100 | memset(lr, 0, sizeof(*lr)); |
1101 | } | |
1102 | ||
5a62257a | 1103 | int line_range__init(struct line_range *lr) |
e53b00d3 MH |
1104 | { |
1105 | memset(lr, 0, sizeof(*lr)); | |
5a62257a MH |
1106 | lr->line_list = intlist__new(NULL); |
1107 | if (!lr->line_list) | |
1108 | return -ENOMEM; | |
1109 | else | |
1110 | return 0; | |
e53b00d3 MH |
1111 | } |
1112 | ||
21dd9ae5 FBH |
1113 | static int parse_line_num(char **ptr, int *val, const char *what) |
1114 | { | |
1115 | const char *start = *ptr; | |
1116 | ||
1117 | errno = 0; | |
1118 | *val = strtol(*ptr, ptr, 0); | |
1119 | if (errno || *ptr == start) { | |
1120 | semantic_error("'%s' is not a valid number.\n", what); | |
1121 | return -EINVAL; | |
1122 | } | |
1123 | return 0; | |
1124 | } | |
1125 | ||
573709fd MH |
1126 | /* Check the name is good for event, group or function */ |
1127 | static bool is_c_func_name(const char *name) | |
1128 | { | |
1129 | if (!isalpha(*name) && *name != '_') | |
1130 | return false; | |
1131 | while (*++name != '\0') { | |
1132 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
1133 | return false; | |
1134 | } | |
1135 | return true; | |
1136 | } | |
1137 | ||
9d95b580 FBH |
1138 | /* |
1139 | * Stuff 'lr' according to the line range described by 'arg'. | |
1140 | * The line range syntax is described by: | |
1141 | * | |
1142 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 1143 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 1144 | */ |
146a1439 | 1145 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 1146 | { |
e116dfa1 | 1147 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
1148 | int err; |
1149 | ||
1150 | if (!name) | |
1151 | return -ENOMEM; | |
1152 | ||
1153 | lr->start = 0; | |
1154 | lr->end = INT_MAX; | |
1155 | ||
1156 | range = strchr(name, ':'); | |
1157 | if (range) { | |
1158 | *range++ = '\0'; | |
1159 | ||
1160 | err = parse_line_num(&range, &lr->start, "start line"); | |
1161 | if (err) | |
1162 | goto err; | |
1163 | ||
1164 | if (*range == '+' || *range == '-') { | |
1165 | const char c = *range++; | |
1166 | ||
1167 | err = parse_line_num(&range, &lr->end, "end line"); | |
1168 | if (err) | |
1169 | goto err; | |
1170 | ||
1171 | if (c == '+') { | |
1172 | lr->end += lr->start; | |
1173 | /* | |
1174 | * Adjust the number of lines here. | |
1175 | * If the number of lines == 1, the | |
1176 | * the end of line should be equal to | |
1177 | * the start of line. | |
1178 | */ | |
1179 | lr->end--; | |
1180 | } | |
1181 | } | |
9d95b580 | 1182 | |
d3b63d7a | 1183 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
1184 | |
1185 | err = -EINVAL; | |
d3b63d7a | 1186 | if (lr->start > lr->end) { |
631c9def | 1187 | semantic_error("Start line must be smaller" |
146a1439 | 1188 | " than end line.\n"); |
21dd9ae5 | 1189 | goto err; |
146a1439 | 1190 | } |
21dd9ae5 FBH |
1191 | if (*range != '\0') { |
1192 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
1193 | goto err; | |
146a1439 | 1194 | } |
d3b63d7a | 1195 | } |
02b95dad | 1196 | |
e116dfa1 MH |
1197 | file = strchr(name, '@'); |
1198 | if (file) { | |
1199 | *file = '\0'; | |
1200 | lr->file = strdup(++file); | |
1201 | if (lr->file == NULL) { | |
1202 | err = -ENOMEM; | |
1203 | goto err; | |
1204 | } | |
1205 | lr->function = name; | |
573709fd | 1206 | } else if (strchr(name, '/') || strchr(name, '.')) |
21dd9ae5 | 1207 | lr->file = name; |
573709fd | 1208 | else if (is_c_func_name(name))/* We reuse it for checking funcname */ |
21dd9ae5 | 1209 | lr->function = name; |
573709fd MH |
1210 | else { /* Invalid name */ |
1211 | semantic_error("'%s' is not a valid function name.\n", name); | |
1212 | err = -EINVAL; | |
1213 | goto err; | |
1214 | } | |
146a1439 MH |
1215 | |
1216 | return 0; | |
21dd9ae5 FBH |
1217 | err: |
1218 | free(name); | |
1219 | return err; | |
631c9def MH |
1220 | } |
1221 | ||
36a009fe MH |
1222 | static int parse_perf_probe_event_name(char **arg, struct perf_probe_event *pev) |
1223 | { | |
1224 | char *ptr; | |
1225 | ||
1226 | ptr = strchr(*arg, ':'); | |
1227 | if (ptr) { | |
1228 | *ptr = '\0'; | |
42bba263 | 1229 | if (!pev->sdt && !is_c_func_name(*arg)) |
36a009fe MH |
1230 | goto ng_name; |
1231 | pev->group = strdup(*arg); | |
1232 | if (!pev->group) | |
1233 | return -ENOMEM; | |
1234 | *arg = ptr + 1; | |
1235 | } else | |
1236 | pev->group = NULL; | |
42bba263 | 1237 | if (!pev->sdt && !is_c_func_name(*arg)) { |
36a009fe MH |
1238 | ng_name: |
1239 | semantic_error("%s is bad for event name -it must " | |
1240 | "follow C symbol-naming rule.\n", *arg); | |
1241 | return -EINVAL; | |
1242 | } | |
1243 | pev->event = strdup(*arg); | |
1244 | if (pev->event == NULL) | |
1245 | return -ENOMEM; | |
1246 | ||
1247 | return 0; | |
1248 | } | |
1249 | ||
50656eec | 1250 | /* Parse probepoint definition. */ |
146a1439 | 1251 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 1252 | { |
4235b045 | 1253 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
1254 | char *ptr, *tmp; |
1255 | char c, nc = 0; | |
3099c026 | 1256 | bool file_spec = false; |
36a009fe MH |
1257 | int ret; |
1258 | ||
50656eec MH |
1259 | /* |
1260 | * <Syntax> | |
8d993d96 MH |
1261 | * perf probe [GRP:][EVENT=]SRC[:LN|;PTN] |
1262 | * perf probe [GRP:][EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
36a009fe | 1263 | * perf probe %[GRP:]SDT_EVENT |
50656eec | 1264 | */ |
e59d29e8 WN |
1265 | if (!arg) |
1266 | return -EINVAL; | |
50656eec | 1267 | |
7e9fca51 MH |
1268 | /* |
1269 | * If the probe point starts with '%', | |
1270 | * or starts with "sdt_" and has a ':' but no '=', | |
1271 | * then it should be a SDT/cached probe point. | |
1272 | */ | |
1273 | if (arg[0] == '%' || | |
1274 | (!strncmp(arg, "sdt_", 4) && | |
1275 | !!strchr(arg, ':') && !strchr(arg, '='))) { | |
36a009fe | 1276 | pev->sdt = true; |
7e9fca51 MH |
1277 | if (arg[0] == '%') |
1278 | arg++; | |
36a009fe MH |
1279 | } |
1280 | ||
2a9c8c36 | 1281 | ptr = strpbrk(arg, ";=@+%"); |
36a009fe | 1282 | if (pev->sdt) { |
8d993d96 | 1283 | if (ptr) { |
a598180a MH |
1284 | if (*ptr != '@') { |
1285 | semantic_error("%s must be an SDT name.\n", | |
1286 | arg); | |
1287 | return -EINVAL; | |
1288 | } | |
1289 | /* This must be a target file name or build id */ | |
1290 | tmp = build_id_cache__complement(ptr + 1); | |
1291 | if (tmp) { | |
1292 | pev->target = build_id_cache__origname(tmp); | |
1293 | free(tmp); | |
1294 | } else | |
1295 | pev->target = strdup(ptr + 1); | |
1296 | if (!pev->target) | |
1297 | return -ENOMEM; | |
1298 | *ptr = '\0'; | |
146a1439 | 1299 | } |
36a009fe MH |
1300 | ret = parse_perf_probe_event_name(&arg, pev); |
1301 | if (ret == 0) { | |
1302 | if (asprintf(&pev->point.function, "%%%s", pev->event) < 0) | |
1303 | ret = -errno; | |
1304 | } | |
1305 | return ret; | |
1306 | } | |
1307 | ||
1308 | if (ptr && *ptr == '=') { /* Event name */ | |
1309 | *ptr = '\0'; | |
1310 | tmp = ptr + 1; | |
1311 | ret = parse_perf_probe_event_name(&arg, pev); | |
1312 | if (ret < 0) | |
1313 | return ret; | |
1314 | ||
af663d75 MH |
1315 | arg = tmp; |
1316 | } | |
1317 | ||
3099c026 NR |
1318 | /* |
1319 | * Check arg is function or file name and copy it. | |
1320 | * | |
1321 | * We consider arg to be a file spec if and only if it satisfies | |
1322 | * all of the below criteria:: | |
1323 | * - it does not include any of "+@%", | |
1324 | * - it includes one of ":;", and | |
1325 | * - it has a period '.' in the name. | |
1326 | * | |
1327 | * Otherwise, we consider arg to be a function specification. | |
1328 | */ | |
1329 | if (!strpbrk(arg, "+@%") && (ptr = strpbrk(arg, ";:")) != NULL) { | |
1330 | /* This is a file spec if it includes a '.' before ; or : */ | |
1331 | if (memchr(arg, '.', ptr - arg)) | |
1332 | file_spec = true; | |
1333 | } | |
1334 | ||
2a9c8c36 | 1335 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
1336 | if (ptr) { |
1337 | nc = *ptr; | |
1338 | *ptr++ = '\0'; | |
1339 | } | |
1340 | ||
6c6e024f WN |
1341 | if (arg[0] == '\0') |
1342 | tmp = NULL; | |
1343 | else { | |
1344 | tmp = strdup(arg); | |
1345 | if (tmp == NULL) | |
1346 | return -ENOMEM; | |
1347 | } | |
02b95dad | 1348 | |
3099c026 | 1349 | if (file_spec) |
02b95dad | 1350 | pp->file = tmp; |
da15bd9d | 1351 | else { |
02b95dad | 1352 | pp->function = tmp; |
50656eec | 1353 | |
da15bd9d WN |
1354 | /* |
1355 | * Keep pp->function even if this is absolute address, | |
1356 | * so it can mark whether abs_address is valid. | |
1357 | * Which make 'perf probe lib.bin 0x0' possible. | |
1358 | * | |
1359 | * Note that checking length of tmp is not needed | |
1360 | * because when we access tmp[1] we know tmp[0] is '0', | |
1361 | * so tmp[1] should always valid (but could be '\0'). | |
1362 | */ | |
1363 | if (tmp && !strncmp(tmp, "0x", 2)) { | |
1364 | pp->abs_address = strtoul(pp->function, &tmp, 0); | |
1365 | if (*tmp != '\0') { | |
1366 | semantic_error("Invalid absolute address.\n"); | |
1367 | return -EINVAL; | |
1368 | } | |
1369 | } | |
1370 | } | |
1371 | ||
50656eec MH |
1372 | /* Parse other options */ |
1373 | while (ptr) { | |
1374 | arg = ptr; | |
1375 | c = nc; | |
2a9c8c36 | 1376 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
1377 | pp->lazy_line = strdup(arg); |
1378 | if (pp->lazy_line == NULL) | |
1379 | return -ENOMEM; | |
2a9c8c36 MH |
1380 | break; |
1381 | } | |
1382 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
1383 | if (ptr) { |
1384 | nc = *ptr; | |
1385 | *ptr++ = '\0'; | |
1386 | } | |
1387 | switch (c) { | |
1388 | case ':': /* Line number */ | |
1389 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 1390 | if (*tmp != '\0') { |
2a9c8c36 | 1391 | semantic_error("There is non-digit char" |
146a1439 MH |
1392 | " in line number.\n"); |
1393 | return -EINVAL; | |
1394 | } | |
50656eec MH |
1395 | break; |
1396 | case '+': /* Byte offset from a symbol */ | |
1397 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 1398 | if (*tmp != '\0') { |
2a9c8c36 | 1399 | semantic_error("There is non-digit character" |
146a1439 MH |
1400 | " in offset.\n"); |
1401 | return -EINVAL; | |
1402 | } | |
50656eec MH |
1403 | break; |
1404 | case '@': /* File name */ | |
146a1439 MH |
1405 | if (pp->file) { |
1406 | semantic_error("SRC@SRC is not allowed.\n"); | |
1407 | return -EINVAL; | |
1408 | } | |
02b95dad MH |
1409 | pp->file = strdup(arg); |
1410 | if (pp->file == NULL) | |
1411 | return -ENOMEM; | |
50656eec MH |
1412 | break; |
1413 | case '%': /* Probe places */ | |
1414 | if (strcmp(arg, "return") == 0) { | |
1415 | pp->retprobe = 1; | |
146a1439 MH |
1416 | } else { /* Others not supported yet */ |
1417 | semantic_error("%%%s is not supported.\n", arg); | |
1418 | return -ENOTSUP; | |
1419 | } | |
50656eec | 1420 | break; |
146a1439 MH |
1421 | default: /* Buggy case */ |
1422 | pr_err("This program has a bug at %s:%d.\n", | |
1423 | __FILE__, __LINE__); | |
1424 | return -ENOTSUP; | |
50656eec MH |
1425 | break; |
1426 | } | |
1427 | } | |
1428 | ||
1429 | /* Exclusion check */ | |
146a1439 | 1430 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
1431 | semantic_error("Lazy pattern can't be used with" |
1432 | " line number.\n"); | |
146a1439 MH |
1433 | return -EINVAL; |
1434 | } | |
2a9c8c36 | 1435 | |
146a1439 | 1436 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 1437 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
1438 | return -EINVAL; |
1439 | } | |
2a9c8c36 | 1440 | |
146a1439 | 1441 | if (pp->line && pp->offset) { |
0e43e5d2 | 1442 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
1443 | return -EINVAL; |
1444 | } | |
50656eec | 1445 | |
146a1439 | 1446 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 1447 | semantic_error("File always requires line number or " |
0e43e5d2 | 1448 | "lazy pattern.\n"); |
146a1439 MH |
1449 | return -EINVAL; |
1450 | } | |
50656eec | 1451 | |
146a1439 | 1452 | if (pp->offset && !pp->function) { |
0e43e5d2 | 1453 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
1454 | return -EINVAL; |
1455 | } | |
50656eec | 1456 | |
146a1439 | 1457 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 1458 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
1459 | return -EINVAL; |
1460 | } | |
50656eec | 1461 | |
146a1439 | 1462 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 1463 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 1464 | "return probe.\n"); |
146a1439 MH |
1465 | return -EINVAL; |
1466 | } | |
50656eec | 1467 | |
4235b045 | 1468 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
1469 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
1470 | pp->lazy_line); | |
146a1439 | 1471 | return 0; |
50656eec MH |
1472 | } |
1473 | ||
7df2f329 | 1474 | /* Parse perf-probe event argument */ |
146a1439 | 1475 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 1476 | { |
b2a3c12b | 1477 | char *tmp, *goodname; |
7df2f329 MH |
1478 | struct perf_probe_arg_field **fieldp; |
1479 | ||
1480 | pr_debug("parsing arg: %s into ", str); | |
1481 | ||
48481938 MH |
1482 | tmp = strchr(str, '='); |
1483 | if (tmp) { | |
02b95dad MH |
1484 | arg->name = strndup(str, tmp - str); |
1485 | if (arg->name == NULL) | |
1486 | return -ENOMEM; | |
11a1ca35 | 1487 | pr_debug("name:%s ", arg->name); |
48481938 MH |
1488 | str = tmp + 1; |
1489 | } | |
1490 | ||
11a1ca35 MH |
1491 | tmp = strchr(str, ':'); |
1492 | if (tmp) { /* Type setting */ | |
1493 | *tmp = '\0'; | |
02b95dad MH |
1494 | arg->type = strdup(tmp + 1); |
1495 | if (arg->type == NULL) | |
1496 | return -ENOMEM; | |
11a1ca35 MH |
1497 | pr_debug("type:%s ", arg->type); |
1498 | } | |
1499 | ||
b2a3c12b | 1500 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
1501 | if (!is_c_varname(str) || !tmp) { |
1502 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
1503 | arg->var = strdup(str); |
1504 | if (arg->var == NULL) | |
1505 | return -ENOMEM; | |
48481938 | 1506 | pr_debug("%s\n", arg->var); |
146a1439 | 1507 | return 0; |
7df2f329 MH |
1508 | } |
1509 | ||
b2a3c12b | 1510 | /* Structure fields or array element */ |
02b95dad MH |
1511 | arg->var = strndup(str, tmp - str); |
1512 | if (arg->var == NULL) | |
1513 | return -ENOMEM; | |
b2a3c12b | 1514 | goodname = arg->var; |
48481938 | 1515 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
1516 | fieldp = &arg->field; |
1517 | ||
1518 | do { | |
e334016f MH |
1519 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
1520 | if (*fieldp == NULL) | |
1521 | return -ENOMEM; | |
b2a3c12b MH |
1522 | if (*tmp == '[') { /* Array */ |
1523 | str = tmp; | |
1524 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 1525 | (*fieldp)->ref = true; |
b2a3c12b MH |
1526 | if (*tmp != ']' || tmp == str + 1) { |
1527 | semantic_error("Array index must be a" | |
1528 | " number.\n"); | |
1529 | return -EINVAL; | |
1530 | } | |
1531 | tmp++; | |
1532 | if (*tmp == '\0') | |
1533 | tmp = NULL; | |
1534 | } else { /* Structure */ | |
1535 | if (*tmp == '.') { | |
1536 | str = tmp + 1; | |
1537 | (*fieldp)->ref = false; | |
1538 | } else if (tmp[1] == '>') { | |
1539 | str = tmp + 2; | |
1540 | (*fieldp)->ref = true; | |
1541 | } else { | |
1542 | semantic_error("Argument parse error: %s\n", | |
1543 | str); | |
1544 | return -EINVAL; | |
1545 | } | |
1546 | tmp = strpbrk(str, "-.["); | |
146a1439 | 1547 | } |
7df2f329 | 1548 | if (tmp) { |
02b95dad MH |
1549 | (*fieldp)->name = strndup(str, tmp - str); |
1550 | if ((*fieldp)->name == NULL) | |
1551 | return -ENOMEM; | |
b2a3c12b MH |
1552 | if (*str != '[') |
1553 | goodname = (*fieldp)->name; | |
7df2f329 MH |
1554 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
1555 | fieldp = &(*fieldp)->next; | |
1556 | } | |
1557 | } while (tmp); | |
02b95dad MH |
1558 | (*fieldp)->name = strdup(str); |
1559 | if ((*fieldp)->name == NULL) | |
1560 | return -ENOMEM; | |
b2a3c12b MH |
1561 | if (*str != '[') |
1562 | goodname = (*fieldp)->name; | |
7df2f329 | 1563 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 1564 | |
b2a3c12b | 1565 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 1566 | if (!arg->name) { |
b2a3c12b | 1567 | arg->name = strdup(goodname); |
02b95dad MH |
1568 | if (arg->name == NULL) |
1569 | return -ENOMEM; | |
1570 | } | |
146a1439 | 1571 | return 0; |
7df2f329 MH |
1572 | } |
1573 | ||
4235b045 | 1574 | /* Parse perf-probe event command */ |
146a1439 | 1575 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1576 | { |
e1c01d61 | 1577 | char **argv; |
146a1439 | 1578 | int argc, i, ret = 0; |
fac13fd5 | 1579 | |
4235b045 | 1580 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1581 | if (!argv) { |
1582 | pr_debug("Failed to split arguments.\n"); | |
1583 | return -ENOMEM; | |
1584 | } | |
1585 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1586 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1587 | ret = -ERANGE; | |
1588 | goto out; | |
1589 | } | |
50656eec | 1590 | /* Parse probe point */ |
146a1439 MH |
1591 | ret = parse_perf_probe_point(argv[0], pev); |
1592 | if (ret < 0) | |
1593 | goto out; | |
50656eec | 1594 | |
e1c01d61 | 1595 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1596 | pev->nargs = argc - 1; |
e334016f MH |
1597 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1598 | if (pev->args == NULL) { | |
1599 | ret = -ENOMEM; | |
1600 | goto out; | |
1601 | } | |
146a1439 MH |
1602 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1603 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1604 | if (ret >= 0 && | |
1605 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1606 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1607 | " kretprobe.\n"); |
1608 | ret = -EINVAL; | |
1609 | } | |
e1c01d61 | 1610 | } |
146a1439 | 1611 | out: |
e1c01d61 | 1612 | argv_free(argv); |
146a1439 MH |
1613 | |
1614 | return ret; | |
50656eec MH |
1615 | } |
1616 | ||
4235b045 MH |
1617 | /* Return true if this perf_probe_event requires debuginfo */ |
1618 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1619 | { | |
1620 | int i; | |
1621 | ||
1622 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
1623 | return true; | |
1624 | ||
1625 | for (i = 0; i < pev->nargs; i++) | |
f6eb0518 MH |
1626 | if (is_c_varname(pev->args[i].var) || |
1627 | !strcmp(pev->args[i].var, "$params") || | |
1628 | !strcmp(pev->args[i].var, "$vars")) | |
4235b045 MH |
1629 | return true; |
1630 | ||
1631 | return false; | |
1632 | } | |
1633 | ||
0e60836b | 1634 | /* Parse probe_events event into struct probe_point */ |
92f6c72e | 1635 | int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev) |
4de189fe | 1636 | { |
0e60836b | 1637 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1638 | char pr; |
1639 | char *p; | |
bcbd0040 | 1640 | char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str; |
4de189fe MH |
1641 | int ret, i, argc; |
1642 | char **argv; | |
1643 | ||
0e60836b | 1644 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1645 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1646 | if (!argv) { |
1647 | pr_debug("Failed to split arguments.\n"); | |
1648 | return -ENOMEM; | |
1649 | } | |
1650 | if (argc < 2) { | |
1651 | semantic_error("Too few probe arguments.\n"); | |
1652 | ret = -ERANGE; | |
1653 | goto out; | |
1654 | } | |
4de189fe MH |
1655 | |
1656 | /* Scan event and group name. */ | |
bcbd0040 IT |
1657 | argv0_str = strdup(argv[0]); |
1658 | if (argv0_str == NULL) { | |
1659 | ret = -ENOMEM; | |
1660 | goto out; | |
1661 | } | |
1662 | fmt1_str = strtok_r(argv0_str, ":", &fmt); | |
1663 | fmt2_str = strtok_r(NULL, "/", &fmt); | |
1664 | fmt3_str = strtok_r(NULL, " \t", &fmt); | |
1665 | if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL | |
1666 | || fmt3_str == NULL) { | |
146a1439 MH |
1667 | semantic_error("Failed to parse event name: %s\n", argv[0]); |
1668 | ret = -EINVAL; | |
1669 | goto out; | |
1670 | } | |
bcbd0040 IT |
1671 | pr = fmt1_str[0]; |
1672 | tev->group = strdup(fmt2_str); | |
1673 | tev->event = strdup(fmt3_str); | |
1674 | if (tev->group == NULL || tev->event == NULL) { | |
1675 | ret = -ENOMEM; | |
1676 | goto out; | |
1677 | } | |
4235b045 | 1678 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1679 | |
4235b045 | 1680 | tp->retprobe = (pr == 'r'); |
4de189fe | 1681 | |
190b57fc MH |
1682 | /* Scan module name(if there), function name and offset */ |
1683 | p = strchr(argv[1], ':'); | |
1684 | if (p) { | |
1685 | tp->module = strndup(argv[1], p - argv[1]); | |
844faa4b MH |
1686 | if (!tp->module) { |
1687 | ret = -ENOMEM; | |
1688 | goto out; | |
1689 | } | |
42bba263 | 1690 | tev->uprobes = (tp->module[0] == '/'); |
190b57fc MH |
1691 | p++; |
1692 | } else | |
1693 | p = argv[1]; | |
bcbd0040 | 1694 | fmt1_str = strtok_r(p, "+", &fmt); |
be07afe9 WN |
1695 | /* only the address started with 0x */ |
1696 | if (fmt1_str[0] == '0') { | |
1697 | /* | |
1698 | * Fix a special case: | |
1699 | * if address == 0, kernel reports something like: | |
1700 | * p:probe_libc/abs_0 /lib/libc-2.18.so:0x (null) arg1=%ax | |
1701 | * Newer kernel may fix that, but we want to | |
1702 | * support old kernel also. | |
1703 | */ | |
1704 | if (strcmp(fmt1_str, "0x") == 0) { | |
1705 | if (!argv[2] || strcmp(argv[2], "(null)")) { | |
1706 | ret = -EINVAL; | |
1707 | goto out; | |
1708 | } | |
1709 | tp->address = 0; | |
1710 | ||
1711 | free(argv[2]); | |
1712 | for (i = 2; argv[i + 1] != NULL; i++) | |
1713 | argv[i] = argv[i + 1]; | |
1714 | ||
1715 | argv[i] = NULL; | |
1716 | argc -= 1; | |
1717 | } else | |
1718 | tp->address = strtoul(fmt1_str, NULL, 0); | |
1719 | } else { | |
5a6f6314 MH |
1720 | /* Only the symbol-based probe has offset */ |
1721 | tp->symbol = strdup(fmt1_str); | |
1722 | if (tp->symbol == NULL) { | |
1723 | ret = -ENOMEM; | |
1724 | goto out; | |
1725 | } | |
1726 | fmt2_str = strtok_r(NULL, "", &fmt); | |
1727 | if (fmt2_str == NULL) | |
1728 | tp->offset = 0; | |
1729 | else | |
1730 | tp->offset = strtoul(fmt2_str, NULL, 10); | |
bcbd0040 | 1731 | } |
4de189fe | 1732 | |
4235b045 | 1733 | tev->nargs = argc - 2; |
0e60836b | 1734 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1735 | if (tev->args == NULL) { |
1736 | ret = -ENOMEM; | |
1737 | goto out; | |
1738 | } | |
4235b045 | 1739 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1740 | p = strchr(argv[i + 2], '='); |
1741 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1742 | *p++ = '\0'; |
1743 | else | |
1744 | p = argv[i + 2]; | |
02b95dad | 1745 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1746 | /* TODO: parse regs and offset */ |
02b95dad MH |
1747 | tev->args[i].value = strdup(p); |
1748 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1749 | ret = -ENOMEM; | |
1750 | goto out; | |
1751 | } | |
4de189fe | 1752 | } |
146a1439 MH |
1753 | ret = 0; |
1754 | out: | |
bcbd0040 | 1755 | free(argv0_str); |
4de189fe | 1756 | argv_free(argv); |
146a1439 | 1757 | return ret; |
4de189fe MH |
1758 | } |
1759 | ||
7df2f329 | 1760 | /* Compose only probe arg */ |
909b0360 | 1761 | char *synthesize_perf_probe_arg(struct perf_probe_arg *pa) |
7df2f329 MH |
1762 | { |
1763 | struct perf_probe_arg_field *field = pa->field; | |
909b0360 | 1764 | struct strbuf buf; |
bf4d5f25 MH |
1765 | char *ret = NULL; |
1766 | int err; | |
1767 | ||
1768 | if (strbuf_init(&buf, 64) < 0) | |
1769 | return NULL; | |
7df2f329 | 1770 | |
48481938 | 1771 | if (pa->name && pa->var) |
bf4d5f25 | 1772 | err = strbuf_addf(&buf, "%s=%s", pa->name, pa->var); |
48481938 | 1773 | else |
bf4d5f25 MH |
1774 | err = strbuf_addstr(&buf, pa->name ?: pa->var); |
1775 | if (err) | |
1776 | goto out; | |
7df2f329 MH |
1777 | |
1778 | while (field) { | |
b2a3c12b | 1779 | if (field->name[0] == '[') |
bf4d5f25 | 1780 | err = strbuf_addstr(&buf, field->name); |
b2a3c12b | 1781 | else |
bf4d5f25 MH |
1782 | err = strbuf_addf(&buf, "%s%s", field->ref ? "->" : ".", |
1783 | field->name); | |
7df2f329 | 1784 | field = field->next; |
bf4d5f25 MH |
1785 | if (err) |
1786 | goto out; | |
7df2f329 | 1787 | } |
11a1ca35 | 1788 | |
909b0360 | 1789 | if (pa->type) |
bf4d5f25 MH |
1790 | if (strbuf_addf(&buf, ":%s", pa->type) < 0) |
1791 | goto out; | |
909b0360 MH |
1792 | |
1793 | ret = strbuf_detach(&buf, NULL); | |
bf4d5f25 MH |
1794 | out: |
1795 | strbuf_release(&buf); | |
146a1439 | 1796 | return ret; |
7df2f329 MH |
1797 | } |
1798 | ||
4235b045 | 1799 | /* Compose only probe point (not argument) */ |
c4ff4920 | 1800 | char *synthesize_perf_probe_point(struct perf_probe_point *pp) |
4de189fe | 1801 | { |
909b0360 | 1802 | struct strbuf buf; |
bf4d5f25 MH |
1803 | char *tmp, *ret = NULL; |
1804 | int len, err = 0; | |
1805 | ||
1806 | if (strbuf_init(&buf, 64) < 0) | |
1807 | return NULL; | |
909b0360 | 1808 | |
909b0360 | 1809 | if (pp->function) { |
bf4d5f25 MH |
1810 | if (strbuf_addstr(&buf, pp->function) < 0) |
1811 | goto out; | |
909b0360 | 1812 | if (pp->offset) |
bf4d5f25 | 1813 | err = strbuf_addf(&buf, "+%lu", pp->offset); |
909b0360 | 1814 | else if (pp->line) |
bf4d5f25 | 1815 | err = strbuf_addf(&buf, ":%d", pp->line); |
909b0360 | 1816 | else if (pp->retprobe) |
bf4d5f25 MH |
1817 | err = strbuf_addstr(&buf, "%return"); |
1818 | if (err) | |
1819 | goto out; | |
fb1587d8 MH |
1820 | } |
1821 | if (pp->file) { | |
32ae2ade FBH |
1822 | tmp = pp->file; |
1823 | len = strlen(tmp); | |
1824 | if (len > 30) { | |
1825 | tmp = strchr(pp->file + len - 30, '/'); | |
1826 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1827 | } | |
bf4d5f25 MH |
1828 | err = strbuf_addf(&buf, "@%s", tmp); |
1829 | if (!err && !pp->function && pp->line) | |
1830 | err = strbuf_addf(&buf, ":%d", pp->line); | |
4de189fe | 1831 | } |
bf4d5f25 MH |
1832 | if (!err) |
1833 | ret = strbuf_detach(&buf, NULL); | |
1834 | out: | |
1835 | strbuf_release(&buf); | |
1836 | return ret; | |
7ef17aaf MH |
1837 | } |
1838 | ||
4235b045 | 1839 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) |
7ef17aaf | 1840 | { |
c4ff4920 MH |
1841 | struct strbuf buf; |
1842 | char *tmp, *ret = NULL; | |
1843 | int i; | |
7ef17aaf | 1844 | |
c4ff4920 | 1845 | if (strbuf_init(&buf, 64)) |
4235b045 | 1846 | return NULL; |
c4ff4920 MH |
1847 | if (pev->event) |
1848 | if (strbuf_addf(&buf, "%s:%s=", pev->group ?: PERFPROBE_GROUP, | |
1849 | pev->event) < 0) | |
1850 | goto out; | |
1851 | ||
1852 | tmp = synthesize_perf_probe_point(&pev->point); | |
1853 | if (!tmp || strbuf_addstr(&buf, tmp) < 0) | |
1854 | goto out; | |
1855 | free(tmp); | |
4de189fe | 1856 | |
4235b045 | 1857 | for (i = 0; i < pev->nargs; i++) { |
c4ff4920 MH |
1858 | tmp = synthesize_perf_probe_arg(pev->args + i); |
1859 | if (!tmp || strbuf_addf(&buf, " %s", tmp) < 0) | |
1860 | goto out; | |
1861 | free(tmp); | |
4de189fe | 1862 | } |
4de189fe | 1863 | |
c4ff4920 MH |
1864 | ret = strbuf_detach(&buf, NULL); |
1865 | out: | |
1866 | strbuf_release(&buf); | |
1867 | return ret; | |
4235b045 | 1868 | } |
4235b045 | 1869 | |
0e60836b | 1870 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
909b0360 | 1871 | struct strbuf *buf, int depth) |
4235b045 | 1872 | { |
bf4d5f25 | 1873 | int err; |
4235b045 | 1874 | if (ref->next) { |
0e60836b | 1875 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
909b0360 | 1876 | depth + 1); |
4235b045 | 1877 | if (depth < 0) |
bf4d5f25 | 1878 | return depth; |
4235b045 | 1879 | } |
bf4d5f25 MH |
1880 | err = strbuf_addf(buf, "%+ld(", ref->offset); |
1881 | return (err < 0) ? err : depth; | |
4de189fe MH |
1882 | } |
1883 | ||
0e60836b | 1884 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
909b0360 | 1885 | struct strbuf *buf) |
50656eec | 1886 | { |
0e60836b | 1887 | struct probe_trace_arg_ref *ref = arg->ref; |
bf4d5f25 | 1888 | int depth = 0, err; |
4235b045 MH |
1889 | |
1890 | /* Argument name or separator */ | |
1891 | if (arg->name) | |
bf4d5f25 | 1892 | err = strbuf_addf(buf, " %s=", arg->name); |
4235b045 | 1893 | else |
bf4d5f25 MH |
1894 | err = strbuf_addch(buf, ' '); |
1895 | if (err) | |
1896 | return err; | |
4235b045 | 1897 | |
b7dcb857 MH |
1898 | /* Special case: @XXX */ |
1899 | if (arg->value[0] == '@' && arg->ref) | |
1900 | ref = ref->next; | |
1901 | ||
4235b045 | 1902 | /* Dereferencing arguments */ |
b7dcb857 | 1903 | if (ref) { |
909b0360 | 1904 | depth = __synthesize_probe_trace_arg_ref(ref, buf, 1); |
4235b045 MH |
1905 | if (depth < 0) |
1906 | return depth; | |
1907 | } | |
1908 | ||
1909 | /* Print argument value */ | |
b7dcb857 | 1910 | if (arg->value[0] == '@' && arg->ref) |
bf4d5f25 | 1911 | err = strbuf_addf(buf, "%s%+ld", arg->value, arg->ref->offset); |
b7dcb857 | 1912 | else |
bf4d5f25 | 1913 | err = strbuf_addstr(buf, arg->value); |
4235b045 MH |
1914 | |
1915 | /* Closing */ | |
bf4d5f25 MH |
1916 | while (!err && depth--) |
1917 | err = strbuf_addch(buf, ')'); | |
1918 | ||
4984912e | 1919 | /* Print argument type */ |
bf4d5f25 MH |
1920 | if (!err && arg->type) |
1921 | err = strbuf_addf(buf, ":%s", arg->type); | |
4235b045 | 1922 | |
bf4d5f25 | 1923 | return err; |
4235b045 MH |
1924 | } |
1925 | ||
0e60836b | 1926 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1927 | { |
0e60836b | 1928 | struct probe_trace_point *tp = &tev->point; |
909b0360 MH |
1929 | struct strbuf buf; |
1930 | char *ret = NULL; | |
bf4d5f25 | 1931 | int i, err; |
eb948e50 | 1932 | |
da15bd9d WN |
1933 | /* Uprobes must have tp->module */ |
1934 | if (tev->uprobes && !tp->module) | |
909b0360 MH |
1935 | return NULL; |
1936 | ||
bf4d5f25 MH |
1937 | if (strbuf_init(&buf, 32) < 0) |
1938 | return NULL; | |
1939 | ||
1940 | if (strbuf_addf(&buf, "%c:%s/%s ", tp->retprobe ? 'r' : 'p', | |
1941 | tev->group, tev->event) < 0) | |
1942 | goto error; | |
da15bd9d WN |
1943 | /* |
1944 | * If tp->address == 0, then this point must be a | |
1945 | * absolute address uprobe. | |
1946 | * try_to_find_absolute_address() should have made | |
1947 | * tp->symbol to "0x0". | |
1948 | */ | |
1949 | if (tev->uprobes && !tp->address) { | |
1950 | if (!tp->symbol || strcmp(tp->symbol, "0x0")) | |
1951 | goto error; | |
1952 | } | |
eb948e50 MH |
1953 | |
1954 | /* Use the tp->address for uprobes */ | |
225466f1 | 1955 | if (tev->uprobes) |
bf4d5f25 | 1956 | err = strbuf_addf(&buf, "%s:0x%lx", tp->module, tp->address); |
da15bd9d WN |
1957 | else if (!strncmp(tp->symbol, "0x", 2)) |
1958 | /* Absolute address. See try_to_find_absolute_address() */ | |
bf4d5f25 MH |
1959 | err = strbuf_addf(&buf, "%s%s0x%lx", tp->module ?: "", |
1960 | tp->module ? ":" : "", tp->address); | |
225466f1 | 1961 | else |
bf4d5f25 MH |
1962 | err = strbuf_addf(&buf, "%s%s%s+%lu", tp->module ?: "", |
1963 | tp->module ? ":" : "", tp->symbol, tp->offset); | |
1964 | if (err) | |
1965 | goto error; | |
50656eec | 1966 | |
909b0360 MH |
1967 | for (i = 0; i < tev->nargs; i++) |
1968 | if (synthesize_probe_trace_arg(&tev->args[i], &buf) < 0) | |
50656eec | 1969 | goto error; |
50656eec | 1970 | |
909b0360 | 1971 | ret = strbuf_detach(&buf, NULL); |
50656eec | 1972 | error: |
909b0360 MH |
1973 | strbuf_release(&buf); |
1974 | return ret; | |
4235b045 | 1975 | } |
50656eec | 1976 | |
5a6f6314 MH |
1977 | static int find_perf_probe_point_from_map(struct probe_trace_point *tp, |
1978 | struct perf_probe_point *pp, | |
1979 | bool is_kprobe) | |
1980 | { | |
1981 | struct symbol *sym = NULL; | |
1982 | struct map *map; | |
e486367f | 1983 | u64 addr = tp->address; |
5a6f6314 MH |
1984 | int ret = -ENOENT; |
1985 | ||
1986 | if (!is_kprobe) { | |
1987 | map = dso__new_map(tp->module); | |
1988 | if (!map) | |
1989 | goto out; | |
5a6f6314 MH |
1990 | sym = map__find_symbol(map, addr, NULL); |
1991 | } else { | |
9b239a12 | 1992 | if (tp->symbol && !addr) { |
0a62f686 MH |
1993 | if (kernel_get_symbol_address_by_name(tp->symbol, |
1994 | &addr, true, false) < 0) | |
9b239a12 MH |
1995 | goto out; |
1996 | } | |
5a6f6314 MH |
1997 | if (addr) { |
1998 | addr += tp->offset; | |
1999 | sym = __find_kernel_function(addr, &map); | |
2000 | } | |
2001 | } | |
98d3b258 | 2002 | |
5a6f6314 MH |
2003 | if (!sym) |
2004 | goto out; | |
2005 | ||
2006 | pp->retprobe = tp->retprobe; | |
2007 | pp->offset = addr - map->unmap_ip(map, sym->start); | |
2008 | pp->function = strdup(sym->name); | |
2009 | ret = pp->function ? 0 : -ENOMEM; | |
2010 | ||
2011 | out: | |
2012 | if (map && !is_kprobe) { | |
84c2cafa | 2013 | map__put(map); |
5a6f6314 MH |
2014 | } |
2015 | ||
2016 | return ret; | |
2017 | } | |
2018 | ||
2019 | static int convert_to_perf_probe_point(struct probe_trace_point *tp, | |
da15bd9d WN |
2020 | struct perf_probe_point *pp, |
2021 | bool is_kprobe) | |
5a6f6314 MH |
2022 | { |
2023 | char buf[128]; | |
2024 | int ret; | |
2025 | ||
2026 | ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe); | |
2027 | if (!ret) | |
2028 | return 0; | |
2029 | ret = find_perf_probe_point_from_map(tp, pp, is_kprobe); | |
2030 | if (!ret) | |
2031 | return 0; | |
2032 | ||
2033 | pr_debug("Failed to find probe point from both of dwarf and map.\n"); | |
2034 | ||
2035 | if (tp->symbol) { | |
2036 | pp->function = strdup(tp->symbol); | |
2037 | pp->offset = tp->offset; | |
614e2fdb | 2038 | } else { |
5a6f6314 MH |
2039 | ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address); |
2040 | if (ret < 0) | |
2041 | return ret; | |
2042 | pp->function = strdup(buf); | |
2043 | pp->offset = 0; | |
2044 | } | |
2045 | if (pp->function == NULL) | |
2046 | return -ENOMEM; | |
2047 | ||
2048 | pp->retprobe = tp->retprobe; | |
2049 | ||
2050 | return 0; | |
2051 | } | |
2052 | ||
0e60836b | 2053 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
225466f1 | 2054 | struct perf_probe_event *pev, bool is_kprobe) |
4235b045 | 2055 | { |
909b0360 | 2056 | struct strbuf buf = STRBUF_INIT; |
146a1439 | 2057 | int i, ret; |
4235b045 | 2058 | |
4b4da7f7 | 2059 | /* Convert event/group name */ |
02b95dad MH |
2060 | pev->event = strdup(tev->event); |
2061 | pev->group = strdup(tev->group); | |
2062 | if (pev->event == NULL || pev->group == NULL) | |
2063 | return -ENOMEM; | |
fb1587d8 | 2064 | |
4b4da7f7 | 2065 | /* Convert trace_point to probe_point */ |
5a6f6314 | 2066 | ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe); |
146a1439 MH |
2067 | if (ret < 0) |
2068 | return ret; | |
4b4da7f7 | 2069 | |
4235b045 MH |
2070 | /* Convert trace_arg to probe_arg */ |
2071 | pev->nargs = tev->nargs; | |
e334016f MH |
2072 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
2073 | if (pev->args == NULL) | |
2074 | return -ENOMEM; | |
02b95dad | 2075 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 2076 | if (tev->args[i].name) |
02b95dad | 2077 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 2078 | else { |
bf4d5f25 MH |
2079 | if ((ret = strbuf_init(&buf, 32)) < 0) |
2080 | goto error; | |
909b0360 MH |
2081 | ret = synthesize_probe_trace_arg(&tev->args[i], &buf); |
2082 | pev->args[i].name = strbuf_detach(&buf, NULL); | |
4235b045 | 2083 | } |
02b95dad MH |
2084 | if (pev->args[i].name == NULL && ret >= 0) |
2085 | ret = -ENOMEM; | |
2086 | } | |
bf4d5f25 | 2087 | error: |
146a1439 MH |
2088 | if (ret < 0) |
2089 | clear_perf_probe_event(pev); | |
2090 | ||
2091 | return ret; | |
4235b045 MH |
2092 | } |
2093 | ||
2094 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
2095 | { | |
7df2f329 | 2096 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
2097 | int i; |
2098 | ||
f5385650 ACM |
2099 | free(pev->event); |
2100 | free(pev->group); | |
7afb3fab | 2101 | free(pev->target); |
9b118aca | 2102 | clear_perf_probe_point(&pev->point); |
f5385650 | 2103 | |
7df2f329 | 2104 | for (i = 0; i < pev->nargs; i++) { |
f5385650 ACM |
2105 | free(pev->args[i].name); |
2106 | free(pev->args[i].var); | |
2107 | free(pev->args[i].type); | |
7df2f329 MH |
2108 | field = pev->args[i].field; |
2109 | while (field) { | |
2110 | next = field->next; | |
74cf249d | 2111 | zfree(&field->name); |
7df2f329 MH |
2112 | free(field); |
2113 | field = next; | |
2114 | } | |
2115 | } | |
f5385650 | 2116 | free(pev->args); |
4235b045 MH |
2117 | memset(pev, 0, sizeof(*pev)); |
2118 | } | |
2119 | ||
0542bb9c MH |
2120 | #define strdup_or_goto(str, label) \ |
2121 | ({ char *__p = NULL; if (str && !(__p = strdup(str))) goto label; __p; }) | |
2122 | ||
2123 | static int perf_probe_point__copy(struct perf_probe_point *dst, | |
2124 | struct perf_probe_point *src) | |
2125 | { | |
2126 | dst->file = strdup_or_goto(src->file, out_err); | |
2127 | dst->function = strdup_or_goto(src->function, out_err); | |
2128 | dst->lazy_line = strdup_or_goto(src->lazy_line, out_err); | |
2129 | dst->line = src->line; | |
2130 | dst->retprobe = src->retprobe; | |
2131 | dst->offset = src->offset; | |
2132 | return 0; | |
2133 | ||
2134 | out_err: | |
2135 | clear_perf_probe_point(dst); | |
2136 | return -ENOMEM; | |
2137 | } | |
2138 | ||
2139 | static int perf_probe_arg__copy(struct perf_probe_arg *dst, | |
2140 | struct perf_probe_arg *src) | |
2141 | { | |
2142 | struct perf_probe_arg_field *field, **ppfield; | |
2143 | ||
2144 | dst->name = strdup_or_goto(src->name, out_err); | |
2145 | dst->var = strdup_or_goto(src->var, out_err); | |
2146 | dst->type = strdup_or_goto(src->type, out_err); | |
2147 | ||
2148 | field = src->field; | |
2149 | ppfield = &(dst->field); | |
2150 | while (field) { | |
2151 | *ppfield = zalloc(sizeof(*field)); | |
2152 | if (!*ppfield) | |
2153 | goto out_err; | |
2154 | (*ppfield)->name = strdup_or_goto(field->name, out_err); | |
2155 | (*ppfield)->index = field->index; | |
2156 | (*ppfield)->ref = field->ref; | |
2157 | field = field->next; | |
2158 | ppfield = &((*ppfield)->next); | |
2159 | } | |
2160 | return 0; | |
2161 | out_err: | |
2162 | return -ENOMEM; | |
2163 | } | |
2164 | ||
2165 | int perf_probe_event__copy(struct perf_probe_event *dst, | |
2166 | struct perf_probe_event *src) | |
2167 | { | |
2168 | int i; | |
2169 | ||
2170 | dst->event = strdup_or_goto(src->event, out_err); | |
2171 | dst->group = strdup_or_goto(src->group, out_err); | |
2172 | dst->target = strdup_or_goto(src->target, out_err); | |
2173 | dst->uprobes = src->uprobes; | |
2174 | ||
2175 | if (perf_probe_point__copy(&dst->point, &src->point) < 0) | |
2176 | goto out_err; | |
2177 | ||
2178 | dst->args = zalloc(sizeof(struct perf_probe_arg) * src->nargs); | |
2179 | if (!dst->args) | |
2180 | goto out_err; | |
2181 | dst->nargs = src->nargs; | |
2182 | ||
2183 | for (i = 0; i < src->nargs; i++) | |
2184 | if (perf_probe_arg__copy(&dst->args[i], &src->args[i]) < 0) | |
2185 | goto out_err; | |
2186 | return 0; | |
2187 | ||
2188 | out_err: | |
2189 | clear_perf_probe_event(dst); | |
2190 | return -ENOMEM; | |
2191 | } | |
2192 | ||
92f6c72e | 2193 | void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 2194 | { |
0e60836b | 2195 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
2196 | int i; |
2197 | ||
f5385650 ACM |
2198 | free(tev->event); |
2199 | free(tev->group); | |
2200 | free(tev->point.symbol); | |
4c859351 | 2201 | free(tev->point.realname); |
f5385650 | 2202 | free(tev->point.module); |
4235b045 | 2203 | for (i = 0; i < tev->nargs; i++) { |
f5385650 ACM |
2204 | free(tev->args[i].name); |
2205 | free(tev->args[i].value); | |
2206 | free(tev->args[i].type); | |
4235b045 MH |
2207 | ref = tev->args[i].ref; |
2208 | while (ref) { | |
2209 | next = ref->next; | |
2210 | free(ref); | |
2211 | ref = next; | |
2212 | } | |
2213 | } | |
f5385650 | 2214 | free(tev->args); |
4235b045 | 2215 | memset(tev, 0, sizeof(*tev)); |
50656eec MH |
2216 | } |
2217 | ||
9aaf5a5f MH |
2218 | struct kprobe_blacklist_node { |
2219 | struct list_head list; | |
2220 | unsigned long start; | |
2221 | unsigned long end; | |
2222 | char *symbol; | |
2223 | }; | |
2224 | ||
2225 | static void kprobe_blacklist__delete(struct list_head *blacklist) | |
2226 | { | |
2227 | struct kprobe_blacklist_node *node; | |
2228 | ||
2229 | while (!list_empty(blacklist)) { | |
2230 | node = list_first_entry(blacklist, | |
2231 | struct kprobe_blacklist_node, list); | |
2232 | list_del(&node->list); | |
2233 | free(node->symbol); | |
2234 | free(node); | |
2235 | } | |
2236 | } | |
2237 | ||
2238 | static int kprobe_blacklist__load(struct list_head *blacklist) | |
2239 | { | |
2240 | struct kprobe_blacklist_node *node; | |
4605eab3 | 2241 | const char *__debugfs = debugfs__mountpoint(); |
9aaf5a5f MH |
2242 | char buf[PATH_MAX], *p; |
2243 | FILE *fp; | |
2244 | int ret; | |
2245 | ||
2246 | if (__debugfs == NULL) | |
2247 | return -ENOTSUP; | |
2248 | ||
2249 | ret = e_snprintf(buf, PATH_MAX, "%s/kprobes/blacklist", __debugfs); | |
2250 | if (ret < 0) | |
2251 | return ret; | |
2252 | ||
2253 | fp = fopen(buf, "r"); | |
2254 | if (!fp) | |
2255 | return -errno; | |
2256 | ||
2257 | ret = 0; | |
2258 | while (fgets(buf, PATH_MAX, fp)) { | |
2259 | node = zalloc(sizeof(*node)); | |
2260 | if (!node) { | |
2261 | ret = -ENOMEM; | |
2262 | break; | |
2263 | } | |
2264 | INIT_LIST_HEAD(&node->list); | |
2265 | list_add_tail(&node->list, blacklist); | |
2266 | if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) { | |
2267 | ret = -EINVAL; | |
2268 | break; | |
2269 | } | |
2270 | p = strchr(buf, '\t'); | |
2271 | if (p) { | |
2272 | p++; | |
2273 | if (p[strlen(p) - 1] == '\n') | |
2274 | p[strlen(p) - 1] = '\0'; | |
2275 | } else | |
2276 | p = (char *)"unknown"; | |
2277 | node->symbol = strdup(p); | |
2278 | if (!node->symbol) { | |
2279 | ret = -ENOMEM; | |
2280 | break; | |
2281 | } | |
2282 | pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n", | |
2283 | node->start, node->end, node->symbol); | |
2284 | ret++; | |
2285 | } | |
2286 | if (ret < 0) | |
2287 | kprobe_blacklist__delete(blacklist); | |
2288 | fclose(fp); | |
2289 | ||
2290 | return ret; | |
2291 | } | |
2292 | ||
2293 | static struct kprobe_blacklist_node * | |
2294 | kprobe_blacklist__find_by_address(struct list_head *blacklist, | |
2295 | unsigned long address) | |
2296 | { | |
2297 | struct kprobe_blacklist_node *node; | |
2298 | ||
2299 | list_for_each_entry(node, blacklist, list) { | |
2300 | if (node->start <= address && address <= node->end) | |
2301 | return node; | |
2302 | } | |
2303 | ||
2304 | return NULL; | |
2305 | } | |
2306 | ||
b031220d MH |
2307 | static LIST_HEAD(kprobe_blacklist); |
2308 | ||
2309 | static void kprobe_blacklist__init(void) | |
2310 | { | |
2311 | if (!list_empty(&kprobe_blacklist)) | |
2312 | return; | |
2313 | ||
2314 | if (kprobe_blacklist__load(&kprobe_blacklist) < 0) | |
2315 | pr_debug("No kprobe blacklist support, ignored\n"); | |
2316 | } | |
2317 | ||
2318 | static void kprobe_blacklist__release(void) | |
2319 | { | |
2320 | kprobe_blacklist__delete(&kprobe_blacklist); | |
2321 | } | |
2322 | ||
2323 | static bool kprobe_blacklist__listed(unsigned long address) | |
2324 | { | |
2325 | return !!kprobe_blacklist__find_by_address(&kprobe_blacklist, address); | |
2326 | } | |
2327 | ||
d350bd57 MH |
2328 | static int perf_probe_event__sprintf(const char *group, const char *event, |
2329 | struct perf_probe_event *pev, | |
ba7ecb02 MH |
2330 | const char *module, |
2331 | struct strbuf *result) | |
278498d4 | 2332 | { |
bf4d5f25 | 2333 | int i, ret; |
909b0360 | 2334 | char *buf; |
278498d4 | 2335 | |
909b0360 MH |
2336 | if (asprintf(&buf, "%s:%s", group, event) < 0) |
2337 | return -errno; | |
bf4d5f25 | 2338 | ret = strbuf_addf(result, " %-20s (on ", buf); |
909b0360 | 2339 | free(buf); |
bf4d5f25 MH |
2340 | if (ret) |
2341 | return ret; | |
4235b045 | 2342 | |
909b0360 MH |
2343 | /* Synthesize only event probe point */ |
2344 | buf = synthesize_perf_probe_point(&pev->point); | |
2345 | if (!buf) | |
2346 | return -ENOMEM; | |
bf4d5f25 | 2347 | ret = strbuf_addstr(result, buf); |
909b0360 | 2348 | free(buf); |
146a1439 | 2349 | |
bf4d5f25 MH |
2350 | if (!ret && module) |
2351 | ret = strbuf_addf(result, " in %s", module); | |
278498d4 | 2352 | |
bf4d5f25 MH |
2353 | if (!ret && pev->nargs > 0) { |
2354 | ret = strbuf_add(result, " with", 5); | |
2355 | for (i = 0; !ret && i < pev->nargs; i++) { | |
909b0360 MH |
2356 | buf = synthesize_perf_probe_arg(&pev->args[i]); |
2357 | if (!buf) | |
2358 | return -ENOMEM; | |
bf4d5f25 | 2359 | ret = strbuf_addf(result, " %s", buf); |
909b0360 | 2360 | free(buf); |
7df2f329 | 2361 | } |
278498d4 | 2362 | } |
bf4d5f25 MH |
2363 | if (!ret) |
2364 | ret = strbuf_addch(result, ')'); | |
909b0360 | 2365 | |
bf4d5f25 | 2366 | return ret; |
278498d4 MH |
2367 | } |
2368 | ||
ba7ecb02 | 2369 | /* Show an event */ |
b02137cc NK |
2370 | int show_perf_probe_event(const char *group, const char *event, |
2371 | struct perf_probe_event *pev, | |
2372 | const char *module, bool use_stdout) | |
ba7ecb02 MH |
2373 | { |
2374 | struct strbuf buf = STRBUF_INIT; | |
2375 | int ret; | |
2376 | ||
d350bd57 | 2377 | ret = perf_probe_event__sprintf(group, event, pev, module, &buf); |
ba7ecb02 MH |
2378 | if (ret >= 0) { |
2379 | if (use_stdout) | |
2380 | printf("%s\n", buf.buf); | |
2381 | else | |
2382 | pr_info("%s\n", buf.buf); | |
2383 | } | |
2384 | strbuf_release(&buf); | |
2385 | ||
2386 | return ret; | |
2387 | } | |
2388 | ||
b6a89643 MH |
2389 | static bool filter_probe_trace_event(struct probe_trace_event *tev, |
2390 | struct strfilter *filter) | |
2391 | { | |
2392 | char tmp[128]; | |
2393 | ||
2394 | /* At first, check the event name itself */ | |
2395 | if (strfilter__compare(filter, tev->event)) | |
2396 | return true; | |
2397 | ||
2398 | /* Next, check the combination of name and group */ | |
2399 | if (e_snprintf(tmp, 128, "%s:%s", tev->group, tev->event) < 0) | |
2400 | return false; | |
2401 | return strfilter__compare(filter, tmp); | |
2402 | } | |
2403 | ||
2404 | static int __show_perf_probe_events(int fd, bool is_kprobe, | |
2405 | struct strfilter *filter) | |
4de189fe | 2406 | { |
225466f1 | 2407 | int ret = 0; |
0e60836b | 2408 | struct probe_trace_event tev; |
4235b045 | 2409 | struct perf_probe_event pev; |
4de189fe MH |
2410 | struct strlist *rawlist; |
2411 | struct str_node *ent; | |
2412 | ||
4235b045 MH |
2413 | memset(&tev, 0, sizeof(tev)); |
2414 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 2415 | |
92f6c72e | 2416 | rawlist = probe_file__get_rawlist(fd); |
146a1439 | 2417 | if (!rawlist) |
6eb08660 | 2418 | return -ENOMEM; |
4de189fe | 2419 | |
602a1f4d | 2420 | strlist__for_each_entry(ent, rawlist) { |
0e60836b | 2421 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 | 2422 | if (ret >= 0) { |
b6a89643 MH |
2423 | if (!filter_probe_trace_event(&tev, filter)) |
2424 | goto next; | |
225466f1 SD |
2425 | ret = convert_to_perf_probe_event(&tev, &pev, |
2426 | is_kprobe); | |
ba7ecb02 MH |
2427 | if (ret < 0) |
2428 | goto next; | |
d350bd57 MH |
2429 | ret = show_perf_probe_event(pev.group, pev.event, |
2430 | &pev, tev.point.module, | |
ba7ecb02 | 2431 | true); |
146a1439 | 2432 | } |
b6a89643 | 2433 | next: |
4235b045 | 2434 | clear_perf_probe_event(&pev); |
0e60836b | 2435 | clear_probe_trace_event(&tev); |
146a1439 MH |
2436 | if (ret < 0) |
2437 | break; | |
4de189fe | 2438 | } |
4de189fe | 2439 | strlist__delete(rawlist); |
7737af01 MH |
2440 | /* Cleanup cached debuginfo if needed */ |
2441 | debuginfo_cache__exit(); | |
146a1439 MH |
2442 | |
2443 | return ret; | |
4de189fe MH |
2444 | } |
2445 | ||
225466f1 | 2446 | /* List up current perf-probe events */ |
b6a89643 | 2447 | int show_perf_probe_events(struct strfilter *filter) |
225466f1 | 2448 | { |
5e45187c | 2449 | int kp_fd, up_fd, ret; |
225466f1 SD |
2450 | |
2451 | setup_pager(); | |
225466f1 | 2452 | |
1f3736c9 MH |
2453 | if (probe_conf.cache) |
2454 | return probe_cache__show_all_caches(filter); | |
2455 | ||
9bae1e8c | 2456 | ret = init_probe_symbol_maps(false); |
225466f1 SD |
2457 | if (ret < 0) |
2458 | return ret; | |
2459 | ||
92f6c72e MH |
2460 | ret = probe_file__open_both(&kp_fd, &up_fd, 0); |
2461 | if (ret < 0) | |
2462 | return ret; | |
225466f1 | 2463 | |
92f6c72e MH |
2464 | if (kp_fd >= 0) |
2465 | ret = __show_perf_probe_events(kp_fd, true, filter); | |
2466 | if (up_fd >= 0 && ret >= 0) | |
b6a89643 | 2467 | ret = __show_perf_probe_events(up_fd, false, filter); |
92f6c72e MH |
2468 | if (kp_fd > 0) |
2469 | close(kp_fd); | |
2470 | if (up_fd > 0) | |
5e45187c | 2471 | close(up_fd); |
9bae1e8c | 2472 | exit_probe_symbol_maps(); |
225466f1 | 2473 | |
146a1439 | 2474 | return ret; |
50656eec MH |
2475 | } |
2476 | ||
146a1439 MH |
2477 | static int get_new_event_name(char *buf, size_t len, const char *base, |
2478 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
2479 | { |
2480 | int i, ret; | |
663b1151 | 2481 | char *p, *nbase; |
17f88fcd | 2482 | |
3099c026 NR |
2483 | if (*base == '.') |
2484 | base++; | |
663b1151 MH |
2485 | nbase = strdup(base); |
2486 | if (!nbase) | |
2487 | return -ENOMEM; | |
2488 | ||
2489 | /* Cut off the dot suffixes (e.g. .const, .isra)*/ | |
2490 | p = strchr(nbase, '.'); | |
2491 | if (p && p != nbase) | |
2492 | *p = '\0'; | |
3099c026 | 2493 | |
663b1151 MH |
2494 | /* Try no suffix number */ |
2495 | ret = e_snprintf(buf, len, "%s", nbase); | |
146a1439 | 2496 | if (ret < 0) { |
5f03cba4 | 2497 | pr_debug("snprintf() failed: %d\n", ret); |
663b1151 | 2498 | goto out; |
146a1439 | 2499 | } |
17f88fcd | 2500 | if (!strlist__has_entry(namelist, buf)) |
663b1151 | 2501 | goto out; |
17f88fcd | 2502 | |
d761b08b | 2503 | if (!allow_suffix) { |
03e01f56 WN |
2504 | pr_warning("Error: event \"%s\" already exists.\n" |
2505 | " Hint: Remove existing event by 'perf probe -d'\n" | |
2506 | " or force duplicates by 'perf probe -f'\n" | |
2507 | " or set 'force=yes' in BPF source.\n", | |
2508 | buf); | |
663b1151 MH |
2509 | ret = -EEXIST; |
2510 | goto out; | |
d761b08b MH |
2511 | } |
2512 | ||
17f88fcd MH |
2513 | /* Try to add suffix */ |
2514 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
663b1151 | 2515 | ret = e_snprintf(buf, len, "%s_%d", nbase, i); |
146a1439 | 2516 | if (ret < 0) { |
5f03cba4 | 2517 | pr_debug("snprintf() failed: %d\n", ret); |
663b1151 | 2518 | goto out; |
146a1439 | 2519 | } |
b498ce1f MH |
2520 | if (!strlist__has_entry(namelist, buf)) |
2521 | break; | |
2522 | } | |
146a1439 MH |
2523 | if (i == MAX_EVENT_INDEX) { |
2524 | pr_warning("Too many events are on the same function.\n"); | |
2525 | ret = -ERANGE; | |
2526 | } | |
2527 | ||
663b1151 MH |
2528 | out: |
2529 | free(nbase); | |
146a1439 | 2530 | return ret; |
b498ce1f MH |
2531 | } |
2532 | ||
79702f61 MH |
2533 | /* Warn if the current kernel's uprobe implementation is old */ |
2534 | static void warn_uprobe_event_compat(struct probe_trace_event *tev) | |
2535 | { | |
2536 | int i; | |
2537 | char *buf = synthesize_probe_trace_command(tev); | |
2538 | ||
2539 | /* Old uprobe event doesn't support memory dereference */ | |
2540 | if (!tev->uprobes || tev->nargs == 0 || !buf) | |
2541 | goto out; | |
2542 | ||
2543 | for (i = 0; i < tev->nargs; i++) | |
2544 | if (strglobmatch(tev->args[i].value, "[$@+-]*")) { | |
2545 | pr_warning("Please upgrade your kernel to at least " | |
2546 | "3.14 to have access to feature %s\n", | |
2547 | tev->args[i].value); | |
2548 | break; | |
2549 | } | |
2550 | out: | |
2551 | free(buf); | |
2552 | } | |
2553 | ||
a3c9de62 MH |
2554 | /* Set new name from original perf_probe_event and namelist */ |
2555 | static int probe_trace_event__set_name(struct probe_trace_event *tev, | |
2556 | struct perf_probe_event *pev, | |
2557 | struct strlist *namelist, | |
2558 | bool allow_suffix) | |
2559 | { | |
2560 | const char *event, *group; | |
2561 | char buf[64]; | |
2562 | int ret; | |
2563 | ||
bc062230 | 2564 | /* If probe_event or trace_event already have the name, reuse it */ |
42bba263 | 2565 | if (pev->event && !pev->sdt) |
a3c9de62 | 2566 | event = pev->event; |
bc062230 MH |
2567 | else if (tev->event) |
2568 | event = tev->event; | |
2569 | else { | |
2570 | /* Or generate new one from probe point */ | |
da15bd9d WN |
2571 | if (pev->point.function && |
2572 | (strncmp(pev->point.function, "0x", 2) != 0) && | |
2573 | !strisglob(pev->point.function)) | |
a3c9de62 MH |
2574 | event = pev->point.function; |
2575 | else | |
2576 | event = tev->point.realname; | |
bc062230 | 2577 | } |
42bba263 | 2578 | if (pev->group && !pev->sdt) |
a3c9de62 | 2579 | group = pev->group; |
bc062230 MH |
2580 | else if (tev->group) |
2581 | group = tev->group; | |
a3c9de62 MH |
2582 | else |
2583 | group = PERFPROBE_GROUP; | |
2584 | ||
2585 | /* Get an unused new event name */ | |
2586 | ret = get_new_event_name(buf, 64, event, | |
2587 | namelist, allow_suffix); | |
2588 | if (ret < 0) | |
2589 | return ret; | |
2590 | ||
2591 | event = buf; | |
2592 | ||
2593 | tev->event = strdup(event); | |
2594 | tev->group = strdup(group); | |
2595 | if (tev->event == NULL || tev->group == NULL) | |
2596 | return -ENOMEM; | |
2597 | ||
2598 | /* Add added event name to namelist */ | |
2599 | strlist__add(namelist, event); | |
2600 | return 0; | |
2601 | } | |
2602 | ||
1de7b8bf MH |
2603 | static int __open_probe_file_and_namelist(bool uprobe, |
2604 | struct strlist **namelist) | |
50656eec | 2605 | { |
1de7b8bf | 2606 | int fd; |
50656eec | 2607 | |
1de7b8bf | 2608 | fd = probe_file__open(PF_FL_RW | (uprobe ? PF_FL_UPROBE : 0)); |
92f6c72e | 2609 | if (fd < 0) |
146a1439 | 2610 | return fd; |
5e45187c | 2611 | |
b498ce1f | 2612 | /* Get current event names */ |
1de7b8bf MH |
2613 | *namelist = probe_file__get_namelist(fd); |
2614 | if (!(*namelist)) { | |
146a1439 | 2615 | pr_debug("Failed to get current event list.\n"); |
1de7b8bf MH |
2616 | close(fd); |
2617 | return -ENOMEM; | |
146a1439 | 2618 | } |
1de7b8bf MH |
2619 | return fd; |
2620 | } | |
2621 | ||
2622 | static int __add_probe_trace_events(struct perf_probe_event *pev, | |
2623 | struct probe_trace_event *tevs, | |
2624 | int ntevs, bool allow_suffix) | |
2625 | { | |
2626 | int i, fd[2] = {-1, -1}, up, ret; | |
2627 | struct probe_trace_event *tev = NULL; | |
2628 | struct probe_cache *cache = NULL; | |
2629 | struct strlist *namelist[2] = {NULL, NULL}; | |
2630 | ||
2631 | up = pev->uprobes ? 1 : 0; | |
2632 | fd[up] = __open_probe_file_and_namelist(up, &namelist[up]); | |
2633 | if (fd[up] < 0) | |
2634 | return fd[up]; | |
4235b045 | 2635 | |
146a1439 | 2636 | ret = 0; |
02b95dad | 2637 | for (i = 0; i < ntevs; i++) { |
4235b045 | 2638 | tev = &tevs[i]; |
1de7b8bf MH |
2639 | up = tev->uprobes ? 1 : 0; |
2640 | if (fd[up] == -1) { /* Open the kprobe/uprobe_events */ | |
2641 | fd[up] = __open_probe_file_and_namelist(up, | |
2642 | &namelist[up]); | |
2643 | if (fd[up] < 0) | |
2644 | goto close_out; | |
2645 | } | |
b031220d | 2646 | /* Skip if the symbol is out of .text or blacklisted */ |
bc062230 | 2647 | if (!tev->point.symbol && !pev->uprobes) |
5a51fcd1 | 2648 | continue; |
9aaf5a5f | 2649 | |
a3c9de62 | 2650 | /* Set new name for tev (and update namelist) */ |
1de7b8bf | 2651 | ret = probe_trace_event__set_name(tev, pev, namelist[up], |
a3c9de62 | 2652 | allow_suffix); |
146a1439 MH |
2653 | if (ret < 0) |
2654 | break; | |
4235b045 | 2655 | |
1de7b8bf | 2656 | ret = probe_file__add_event(fd[up], tev); |
146a1439 MH |
2657 | if (ret < 0) |
2658 | break; | |
4235b045 | 2659 | |
4235b045 MH |
2660 | /* |
2661 | * Probes after the first probe which comes from same | |
2662 | * user input are always allowed to add suffix, because | |
2663 | * there might be several addresses corresponding to | |
2664 | * one code line. | |
2665 | */ | |
2666 | allow_suffix = true; | |
50656eec | 2667 | } |
79702f61 MH |
2668 | if (ret == -EINVAL && pev->uprobes) |
2669 | warn_uprobe_event_compat(tev); | |
2fd457a3 MH |
2670 | if (ret == 0 && probe_conf.cache) { |
2671 | cache = probe_cache__new(pev->target); | |
2672 | if (!cache || | |
2673 | probe_cache__add_entry(cache, pev, tevs, ntevs) < 0 || | |
2674 | probe_cache__commit(cache) < 0) | |
2675 | pr_warning("Failed to add event to probe cache\n"); | |
2676 | probe_cache__delete(cache); | |
2677 | } | |
146a1439 | 2678 | |
ae2cb1ac | 2679 | close_out: |
1de7b8bf MH |
2680 | for (up = 0; up < 2; up++) { |
2681 | strlist__delete(namelist[up]); | |
2682 | if (fd[up] >= 0) | |
2683 | close(fd[up]); | |
2684 | } | |
146a1439 | 2685 | return ret; |
50656eec | 2686 | } |
fa28244d | 2687 | |
6bb536cc WN |
2688 | static int find_probe_functions(struct map *map, char *name, |
2689 | struct symbol **syms) | |
eb948e50 | 2690 | { |
564c62a4 | 2691 | int found = 0; |
0a3873a8 | 2692 | struct symbol *sym; |
4c859351 | 2693 | struct rb_node *tmp; |
564c62a4 | 2694 | |
75e4a2a6 WN |
2695 | if (map__load(map, NULL) < 0) |
2696 | return 0; | |
2697 | ||
4c859351 | 2698 | map__for_each_symbol(map, sym, tmp) { |
6bb536cc | 2699 | if (strglobmatch(sym->name, name)) { |
4c859351 | 2700 | found++; |
6bb536cc WN |
2701 | if (syms && found < probe_conf.max_probes) |
2702 | syms[found - 1] = sym; | |
2703 | } | |
eb948e50 | 2704 | } |
564c62a4 NK |
2705 | |
2706 | return found; | |
eb948e50 MH |
2707 | } |
2708 | ||
7b6ff0bd NR |
2709 | void __weak arch__fix_tev_from_maps(struct perf_probe_event *pev __maybe_unused, |
2710 | struct probe_trace_event *tev __maybe_unused, | |
0b3c2264 NR |
2711 | struct map *map __maybe_unused, |
2712 | struct symbol *sym __maybe_unused) { } | |
7b6ff0bd | 2713 | |
eb948e50 MH |
2714 | /* |
2715 | * Find probe function addresses from map. | |
2716 | * Return an error or the number of found probe_trace_event | |
2717 | */ | |
2718 | static int find_probe_trace_events_from_map(struct perf_probe_event *pev, | |
ddb2f58f | 2719 | struct probe_trace_event **tevs) |
e0faa8d3 | 2720 | { |
eb948e50 | 2721 | struct map *map = NULL; |
eb948e50 | 2722 | struct ref_reloc_sym *reloc_sym = NULL; |
e0faa8d3 | 2723 | struct symbol *sym; |
6bb536cc | 2724 | struct symbol **syms = NULL; |
0e60836b | 2725 | struct probe_trace_event *tev; |
eb948e50 MH |
2726 | struct perf_probe_point *pp = &pev->point; |
2727 | struct probe_trace_point *tp; | |
564c62a4 | 2728 | int num_matched_functions; |
b031220d | 2729 | int ret, i, j, skipped = 0; |
c61fb959 | 2730 | char *mod_name; |
4235b045 | 2731 | |
44225521 | 2732 | map = get_target_map(pev->target, pev->uprobes); |
eb948e50 MH |
2733 | if (!map) { |
2734 | ret = -EINVAL; | |
2735 | goto out; | |
fb7345bb MH |
2736 | } |
2737 | ||
6bb536cc WN |
2738 | syms = malloc(sizeof(struct symbol *) * probe_conf.max_probes); |
2739 | if (!syms) { | |
2740 | ret = -ENOMEM; | |
2741 | goto out; | |
2742 | } | |
2743 | ||
eb948e50 MH |
2744 | /* |
2745 | * Load matched symbols: Since the different local symbols may have | |
2746 | * same name but different addresses, this lists all the symbols. | |
2747 | */ | |
6bb536cc | 2748 | num_matched_functions = find_probe_functions(map, pp->function, syms); |
564c62a4 | 2749 | if (num_matched_functions == 0) { |
eb948e50 | 2750 | pr_err("Failed to find symbol %s in %s\n", pp->function, |
44225521 | 2751 | pev->target ? : "kernel"); |
eb948e50 MH |
2752 | ret = -ENOENT; |
2753 | goto out; | |
ddb2f58f | 2754 | } else if (num_matched_functions > probe_conf.max_probes) { |
eb948e50 | 2755 | pr_err("Too many functions matched in %s\n", |
44225521 | 2756 | pev->target ? : "kernel"); |
eb948e50 MH |
2757 | ret = -E2BIG; |
2758 | goto out; | |
fb7345bb MH |
2759 | } |
2760 | ||
1a8ac29c MH |
2761 | /* Note that the symbols in the kmodule are not relocated */ |
2762 | if (!pev->uprobes && !pp->retprobe && !pev->target) { | |
0560a0c4 | 2763 | reloc_sym = kernel_get_ref_reloc_sym(); |
eb948e50 MH |
2764 | if (!reloc_sym) { |
2765 | pr_warning("Relocated base symbol is not found!\n"); | |
2766 | ret = -EINVAL; | |
2767 | goto out; | |
2768 | } | |
2769 | } | |
4235b045 | 2770 | |
eb948e50 MH |
2771 | /* Setup result trace-probe-events */ |
2772 | *tevs = zalloc(sizeof(*tev) * num_matched_functions); | |
2773 | if (!*tevs) { | |
02b95dad | 2774 | ret = -ENOMEM; |
eb948e50 | 2775 | goto out; |
02b95dad | 2776 | } |
ce27a443 | 2777 | |
eb948e50 | 2778 | ret = 0; |
564c62a4 | 2779 | |
6bb536cc WN |
2780 | for (j = 0; j < num_matched_functions; j++) { |
2781 | sym = syms[j]; | |
2782 | ||
eb948e50 MH |
2783 | tev = (*tevs) + ret; |
2784 | tp = &tev->point; | |
2785 | if (ret == num_matched_functions) { | |
2786 | pr_warning("Too many symbols are listed. Skip it.\n"); | |
2787 | break; | |
ce27a443 | 2788 | } |
eb948e50 | 2789 | ret++; |
ce27a443 | 2790 | |
eb948e50 MH |
2791 | if (pp->offset > sym->end - sym->start) { |
2792 | pr_warning("Offset %ld is bigger than the size of %s\n", | |
2793 | pp->offset, sym->name); | |
2794 | ret = -ENOENT; | |
2795 | goto err_out; | |
2796 | } | |
2797 | /* Add one probe point */ | |
2798 | tp->address = map->unmap_ip(map, sym->start) + pp->offset; | |
1a8ac29c MH |
2799 | |
2800 | /* Check the kprobe (not in module) is within .text */ | |
2801 | if (!pev->uprobes && !pev->target && | |
b031220d MH |
2802 | kprobe_warn_out_range(sym->name, tp->address)) { |
2803 | tp->symbol = NULL; /* Skip it */ | |
2804 | skipped++; | |
2805 | } else if (reloc_sym) { | |
eb948e50 MH |
2806 | tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out); |
2807 | tp->offset = tp->address - reloc_sym->addr; | |
2808 | } else { | |
2809 | tp->symbol = strdup_or_goto(sym->name, nomem_out); | |
2810 | tp->offset = pp->offset; | |
2811 | } | |
6bb536cc WN |
2812 | tp->realname = strdup_or_goto(sym->name, nomem_out); |
2813 | ||
eb948e50 | 2814 | tp->retprobe = pp->retprobe; |
c61fb959 RB |
2815 | if (pev->target) { |
2816 | if (pev->uprobes) { | |
2817 | tev->point.module = strdup_or_goto(pev->target, | |
2818 | nomem_out); | |
2819 | } else { | |
2820 | mod_name = find_module_name(pev->target); | |
2821 | tev->point.module = | |
2822 | strdup(mod_name ? mod_name : pev->target); | |
2823 | free(mod_name); | |
2824 | if (!tev->point.module) | |
2825 | goto nomem_out; | |
2826 | } | |
2827 | } | |
eb948e50 MH |
2828 | tev->uprobes = pev->uprobes; |
2829 | tev->nargs = pev->nargs; | |
2830 | if (tev->nargs) { | |
2831 | tev->args = zalloc(sizeof(struct probe_trace_arg) * | |
2832 | tev->nargs); | |
2833 | if (tev->args == NULL) | |
2834 | goto nomem_out; | |
e334016f | 2835 | } |
48481938 | 2836 | for (i = 0; i < tev->nargs; i++) { |
eb948e50 MH |
2837 | if (pev->args[i].name) |
2838 | tev->args[i].name = | |
2839 | strdup_or_goto(pev->args[i].name, | |
2840 | nomem_out); | |
2841 | ||
2842 | tev->args[i].value = strdup_or_goto(pev->args[i].var, | |
2843 | nomem_out); | |
2844 | if (pev->args[i].type) | |
2845 | tev->args[i].type = | |
2846 | strdup_or_goto(pev->args[i].type, | |
2847 | nomem_out); | |
48481938 | 2848 | } |
0b3c2264 | 2849 | arch__fix_tev_from_maps(pev, tev, map, sym); |
4235b045 | 2850 | } |
b031220d MH |
2851 | if (ret == skipped) { |
2852 | ret = -ENOENT; | |
2853 | goto err_out; | |
2854 | } | |
4235b045 | 2855 | |
eb948e50 | 2856 | out: |
9b118aca | 2857 | put_target_map(map, pev->uprobes); |
6bb536cc | 2858 | free(syms); |
eb948e50 | 2859 | return ret; |
225466f1 | 2860 | |
eb948e50 MH |
2861 | nomem_out: |
2862 | ret = -ENOMEM; | |
2863 | err_out: | |
2864 | clear_probe_trace_events(*tevs, num_matched_functions); | |
2865 | zfree(tevs); | |
2866 | goto out; | |
2867 | } | |
1c1bc922 | 2868 | |
da15bd9d WN |
2869 | static int try_to_find_absolute_address(struct perf_probe_event *pev, |
2870 | struct probe_trace_event **tevs) | |
2871 | { | |
2872 | struct perf_probe_point *pp = &pev->point; | |
2873 | struct probe_trace_event *tev; | |
2874 | struct probe_trace_point *tp; | |
2875 | int i, err; | |
2876 | ||
2877 | if (!(pev->point.function && !strncmp(pev->point.function, "0x", 2))) | |
2878 | return -EINVAL; | |
2879 | if (perf_probe_event_need_dwarf(pev)) | |
2880 | return -EINVAL; | |
2881 | ||
2882 | /* | |
2883 | * This is 'perf probe /lib/libc.so 0xabcd'. Try to probe at | |
2884 | * absolute address. | |
2885 | * | |
2886 | * Only one tev can be generated by this. | |
2887 | */ | |
2888 | *tevs = zalloc(sizeof(*tev)); | |
2889 | if (!*tevs) | |
2890 | return -ENOMEM; | |
2891 | ||
2892 | tev = *tevs; | |
2893 | tp = &tev->point; | |
2894 | ||
2895 | /* | |
2896 | * Don't use tp->offset, use address directly, because | |
2897 | * in synthesize_probe_trace_command() address cannot be | |
2898 | * zero. | |
2899 | */ | |
2900 | tp->address = pev->point.abs_address; | |
2901 | tp->retprobe = pp->retprobe; | |
2902 | tev->uprobes = pev->uprobes; | |
2903 | ||
2904 | err = -ENOMEM; | |
2905 | /* | |
2906 | * Give it a '0x' leading symbol name. | |
2907 | * In __add_probe_trace_events, a NULL symbol is interpreted as | |
2908 | * invalud. | |
2909 | */ | |
2910 | if (asprintf(&tp->symbol, "0x%lx", tp->address) < 0) | |
2911 | goto errout; | |
2912 | ||
2913 | /* For kprobe, check range */ | |
2914 | if ((!tev->uprobes) && | |
2915 | (kprobe_warn_out_range(tev->point.symbol, | |
2916 | tev->point.address))) { | |
2917 | err = -EACCES; | |
2918 | goto errout; | |
2919 | } | |
2920 | ||
2921 | if (asprintf(&tp->realname, "abs_%lx", tp->address) < 0) | |
2922 | goto errout; | |
2923 | ||
2924 | if (pev->target) { | |
2925 | tp->module = strdup(pev->target); | |
2926 | if (!tp->module) | |
2927 | goto errout; | |
2928 | } | |
2929 | ||
2930 | if (tev->group) { | |
2931 | tev->group = strdup(pev->group); | |
2932 | if (!tev->group) | |
2933 | goto errout; | |
2934 | } | |
2935 | ||
2936 | if (pev->event) { | |
2937 | tev->event = strdup(pev->event); | |
2938 | if (!tev->event) | |
2939 | goto errout; | |
2940 | } | |
2941 | ||
2942 | tev->nargs = pev->nargs; | |
2943 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); | |
2944 | if (!tev->args) { | |
2945 | err = -ENOMEM; | |
2946 | goto errout; | |
2947 | } | |
2948 | for (i = 0; i < tev->nargs; i++) | |
2949 | copy_to_probe_trace_arg(&tev->args[i], &pev->args[i]); | |
2950 | ||
2951 | return 1; | |
2952 | ||
2953 | errout: | |
2954 | if (*tevs) { | |
2955 | clear_probe_trace_events(*tevs, 1); | |
2956 | *tevs = NULL; | |
2957 | } | |
2958 | return err; | |
2959 | } | |
2960 | ||
42bba263 MH |
2961 | /* Concatinate two arrays */ |
2962 | static void *memcat(void *a, size_t sz_a, void *b, size_t sz_b) | |
2963 | { | |
2964 | void *ret; | |
2965 | ||
2966 | ret = malloc(sz_a + sz_b); | |
2967 | if (ret) { | |
2968 | memcpy(ret, a, sz_a); | |
2969 | memcpy(ret + sz_a, b, sz_b); | |
2970 | } | |
2971 | return ret; | |
2972 | } | |
2973 | ||
2974 | static int | |
2975 | concat_probe_trace_events(struct probe_trace_event **tevs, int *ntevs, | |
2976 | struct probe_trace_event **tevs2, int ntevs2) | |
2977 | { | |
2978 | struct probe_trace_event *new_tevs; | |
2979 | int ret = 0; | |
2980 | ||
2981 | if (ntevs == 0) { | |
2982 | *tevs = *tevs2; | |
2983 | *ntevs = ntevs2; | |
2984 | *tevs2 = NULL; | |
2985 | return 0; | |
2986 | } | |
2987 | ||
2988 | if (*ntevs + ntevs2 > probe_conf.max_probes) | |
2989 | ret = -E2BIG; | |
2990 | else { | |
2991 | /* Concatinate the array of probe_trace_event */ | |
2992 | new_tevs = memcat(*tevs, (*ntevs) * sizeof(**tevs), | |
2993 | *tevs2, ntevs2 * sizeof(**tevs2)); | |
2994 | if (!new_tevs) | |
2995 | ret = -ENOMEM; | |
2996 | else { | |
2997 | free(*tevs); | |
2998 | *tevs = new_tevs; | |
2999 | *ntevs += ntevs2; | |
3000 | } | |
3001 | } | |
3002 | if (ret < 0) | |
3003 | clear_probe_trace_events(*tevs2, ntevs2); | |
3004 | zfree(tevs2); | |
3005 | ||
3006 | return ret; | |
3007 | } | |
3008 | ||
3009 | /* | |
3010 | * Try to find probe_trace_event from given probe caches. Return the number | |
3011 | * of cached events found, if an error occurs return the error. | |
3012 | */ | |
3013 | static int find_cached_events(struct perf_probe_event *pev, | |
3014 | struct probe_trace_event **tevs, | |
3015 | const char *target) | |
3016 | { | |
3017 | struct probe_cache *cache; | |
3018 | struct probe_cache_entry *entry; | |
3019 | struct probe_trace_event *tmp_tevs = NULL; | |
3020 | int ntevs = 0; | |
3021 | int ret = 0; | |
3022 | ||
3023 | cache = probe_cache__new(target); | |
3024 | /* Return 0 ("not found") if the target has no probe cache. */ | |
3025 | if (!cache) | |
3026 | return 0; | |
3027 | ||
3028 | for_each_probe_cache_entry(entry, cache) { | |
3029 | /* Skip the cache entry which has no name */ | |
3030 | if (!entry->pev.event || !entry->pev.group) | |
3031 | continue; | |
3032 | if ((!pev->group || strglobmatch(entry->pev.group, pev->group)) && | |
3033 | strglobmatch(entry->pev.event, pev->event)) { | |
3034 | ret = probe_cache_entry__get_event(entry, &tmp_tevs); | |
3035 | if (ret > 0) | |
3036 | ret = concat_probe_trace_events(tevs, &ntevs, | |
3037 | &tmp_tevs, ret); | |
3038 | if (ret < 0) | |
3039 | break; | |
3040 | } | |
3041 | } | |
3042 | probe_cache__delete(cache); | |
3043 | if (ret < 0) { | |
3044 | clear_probe_trace_events(*tevs, ntevs); | |
3045 | zfree(tevs); | |
3046 | } else { | |
3047 | ret = ntevs; | |
3048 | if (ntevs > 0 && target && target[0] == '/') | |
3049 | pev->uprobes = true; | |
3050 | } | |
3051 | ||
3052 | return ret; | |
3053 | } | |
3054 | ||
1de7b8bf MH |
3055 | /* Try to find probe_trace_event from all probe caches */ |
3056 | static int find_cached_events_all(struct perf_probe_event *pev, | |
3057 | struct probe_trace_event **tevs) | |
3058 | { | |
3059 | struct probe_trace_event *tmp_tevs = NULL; | |
3060 | struct strlist *bidlist; | |
3061 | struct str_node *nd; | |
3062 | char *pathname; | |
3063 | int ntevs = 0; | |
3064 | int ret; | |
3065 | ||
3066 | /* Get the buildid list of all valid caches */ | |
3067 | bidlist = build_id_cache__list_all(true); | |
3068 | if (!bidlist) { | |
3069 | ret = -errno; | |
3070 | pr_debug("Failed to get buildids: %d\n", ret); | |
3071 | return ret; | |
3072 | } | |
3073 | ||
3074 | ret = 0; | |
3075 | strlist__for_each_entry(nd, bidlist) { | |
3076 | pathname = build_id_cache__origname(nd->s); | |
3077 | ret = find_cached_events(pev, &tmp_tevs, pathname); | |
3078 | /* In the case of cnt == 0, we just skip it */ | |
3079 | if (ret > 0) | |
3080 | ret = concat_probe_trace_events(tevs, &ntevs, | |
3081 | &tmp_tevs, ret); | |
3082 | free(pathname); | |
3083 | if (ret < 0) | |
3084 | break; | |
3085 | } | |
3086 | strlist__delete(bidlist); | |
3087 | ||
3088 | if (ret < 0) { | |
3089 | clear_probe_trace_events(*tevs, ntevs); | |
3090 | zfree(tevs); | |
3091 | } else | |
3092 | ret = ntevs; | |
3093 | ||
3094 | return ret; | |
3095 | } | |
3096 | ||
bc062230 MH |
3097 | static int find_probe_trace_events_from_cache(struct perf_probe_event *pev, |
3098 | struct probe_trace_event **tevs) | |
3099 | { | |
3100 | struct probe_cache *cache; | |
3101 | struct probe_cache_entry *entry; | |
3102 | struct probe_trace_event *tev; | |
3103 | struct str_node *node; | |
3104 | int ret, i; | |
3105 | ||
1de7b8bf | 3106 | if (pev->sdt) { |
42bba263 | 3107 | /* For SDT/cached events, we use special search functions */ |
1de7b8bf MH |
3108 | if (!pev->target) |
3109 | return find_cached_events_all(pev, tevs); | |
3110 | else | |
3111 | return find_cached_events(pev, tevs, pev->target); | |
3112 | } | |
bc062230 MH |
3113 | cache = probe_cache__new(pev->target); |
3114 | if (!cache) | |
3115 | return 0; | |
3116 | ||
3117 | entry = probe_cache__find(cache, pev); | |
3118 | if (!entry) { | |
36a009fe MH |
3119 | /* SDT must be in the cache */ |
3120 | ret = pev->sdt ? -ENOENT : 0; | |
bc062230 MH |
3121 | goto out; |
3122 | } | |
3123 | ||
3124 | ret = strlist__nr_entries(entry->tevlist); | |
3125 | if (ret > probe_conf.max_probes) { | |
3126 | pr_debug("Too many entries matched in the cache of %s\n", | |
3127 | pev->target ? : "kernel"); | |
3128 | ret = -E2BIG; | |
3129 | goto out; | |
3130 | } | |
3131 | ||
3132 | *tevs = zalloc(ret * sizeof(*tev)); | |
3133 | if (!*tevs) { | |
3134 | ret = -ENOMEM; | |
3135 | goto out; | |
3136 | } | |
3137 | ||
3138 | i = 0; | |
3139 | strlist__for_each_entry(node, entry->tevlist) { | |
3140 | tev = &(*tevs)[i++]; | |
3141 | ret = parse_probe_trace_command(node->s, tev); | |
3142 | if (ret < 0) | |
3143 | goto out; | |
3144 | /* Set the uprobes attribute as same as original */ | |
3145 | tev->uprobes = pev->uprobes; | |
3146 | } | |
3147 | ret = i; | |
3148 | ||
3149 | out: | |
3150 | probe_cache__delete(cache); | |
3151 | return ret; | |
3152 | } | |
3153 | ||
eb948e50 | 3154 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
ddb2f58f | 3155 | struct probe_trace_event **tevs) |
eb948e50 MH |
3156 | { |
3157 | int ret; | |
3158 | ||
36a009fe | 3159 | if (!pev->group && !pev->sdt) { |
2a12ec13 MH |
3160 | /* Set group name if not given */ |
3161 | if (!pev->uprobes) { | |
3162 | pev->group = strdup(PERFPROBE_GROUP); | |
3163 | ret = pev->group ? 0 : -ENOMEM; | |
3164 | } else | |
3165 | ret = convert_exec_to_group(pev->target, &pev->group); | |
eb948e50 MH |
3166 | if (ret != 0) { |
3167 | pr_warning("Failed to make a group name.\n"); | |
3168 | return ret; | |
3169 | } | |
02b95dad | 3170 | } |
e334016f | 3171 | |
da15bd9d WN |
3172 | ret = try_to_find_absolute_address(pev, tevs); |
3173 | if (ret > 0) | |
3174 | return ret; | |
3175 | ||
bc062230 MH |
3176 | /* At first, we need to lookup cache entry */ |
3177 | ret = find_probe_trace_events_from_cache(pev, tevs); | |
36a009fe MH |
3178 | if (ret > 0 || pev->sdt) /* SDT can be found only in the cache */ |
3179 | return ret == 0 ? -ENOENT : ret; /* Found in probe cache */ | |
bc062230 | 3180 | |
eb948e50 | 3181 | /* Convert perf_probe_event with debuginfo */ |
ddb2f58f | 3182 | ret = try_to_find_probe_trace_events(pev, tevs); |
eb948e50 MH |
3183 | if (ret != 0) |
3184 | return ret; /* Found in debuginfo or got an error */ | |
3185 | ||
ddb2f58f | 3186 | return find_probe_trace_events_from_map(pev, tevs); |
4235b045 MH |
3187 | } |
3188 | ||
12fae5ef | 3189 | int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs) |
4235b045 | 3190 | { |
844dffa5 | 3191 | int i, ret; |
4235b045 | 3192 | |
4235b045 MH |
3193 | /* Loop 1: convert all events */ |
3194 | for (i = 0; i < npevs; i++) { | |
b031220d | 3195 | /* Init kprobe blacklist if needed */ |
12fae5ef | 3196 | if (!pevs[i].uprobes) |
b031220d | 3197 | kprobe_blacklist__init(); |
4235b045 | 3198 | /* Convert with or without debuginfo */ |
12fae5ef | 3199 | ret = convert_to_probe_trace_events(&pevs[i], &pevs[i].tevs); |
146a1439 | 3200 | if (ret < 0) |
844dffa5 | 3201 | return ret; |
12fae5ef | 3202 | pevs[i].ntevs = ret; |
e0faa8d3 | 3203 | } |
b031220d MH |
3204 | /* This just release blacklist only if allocated */ |
3205 | kprobe_blacklist__release(); | |
e0faa8d3 | 3206 | |
844dffa5 NK |
3207 | return 0; |
3208 | } | |
3209 | ||
12fae5ef | 3210 | int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs) |
844dffa5 NK |
3211 | { |
3212 | int i, ret = 0; | |
3213 | ||
4235b045 | 3214 | /* Loop 2: add all events */ |
8635bf6e | 3215 | for (i = 0; i < npevs; i++) { |
12fae5ef WN |
3216 | ret = __add_probe_trace_events(&pevs[i], pevs[i].tevs, |
3217 | pevs[i].ntevs, | |
ddb2f58f | 3218 | probe_conf.force_add); |
fbee632d ACM |
3219 | if (ret < 0) |
3220 | break; | |
3221 | } | |
844dffa5 NK |
3222 | return ret; |
3223 | } | |
3224 | ||
12fae5ef | 3225 | void cleanup_perf_probe_events(struct perf_probe_event *pevs, int npevs) |
844dffa5 NK |
3226 | { |
3227 | int i, j; | |
3228 | ||
449e5b24 MH |
3229 | /* Loop 3: cleanup and free trace events */ |
3230 | for (i = 0; i < npevs; i++) { | |
12fae5ef WN |
3231 | for (j = 0; j < pevs[i].ntevs; j++) |
3232 | clear_probe_trace_event(&pevs[i].tevs[j]); | |
3233 | zfree(&pevs[i].tevs); | |
3234 | pevs[i].ntevs = 0; | |
a43aac29 | 3235 | clear_perf_probe_event(&pevs[i]); |
449e5b24 | 3236 | } |
844dffa5 NK |
3237 | } |
3238 | ||
3239 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs) | |
3240 | { | |
3241 | int ret; | |
844dffa5 | 3242 | |
9bae1e8c NK |
3243 | ret = init_probe_symbol_maps(pevs->uprobes); |
3244 | if (ret < 0) | |
3245 | return ret; | |
3246 | ||
12fae5ef | 3247 | ret = convert_perf_probe_events(pevs, npevs); |
844dffa5 | 3248 | if (ret == 0) |
12fae5ef | 3249 | ret = apply_perf_probe_events(pevs, npevs); |
844dffa5 | 3250 | |
12fae5ef | 3251 | cleanup_perf_probe_events(pevs, npevs); |
146a1439 | 3252 | |
9bae1e8c | 3253 | exit_probe_symbol_maps(); |
146a1439 | 3254 | return ret; |
e0faa8d3 MH |
3255 | } |
3256 | ||
307a464b | 3257 | int del_perf_probe_events(struct strfilter *filter) |
fa28244d | 3258 | { |
307a464b | 3259 | int ret, ret2, ufd = -1, kfd = -1; |
307a464b MH |
3260 | char *str = strfilter__string(filter); |
3261 | ||
3262 | if (!str) | |
3263 | return -EINVAL; | |
3264 | ||
fa28244d | 3265 | /* Get current event names */ |
92f6c72e MH |
3266 | ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW); |
3267 | if (ret < 0) | |
3268 | goto out; | |
467ec085 | 3269 | |
92f6c72e | 3270 | ret = probe_file__del_events(kfd, filter); |
307a464b | 3271 | if (ret < 0 && ret != -ENOENT) |
225466f1 | 3272 | goto error; |
225466f1 | 3273 | |
92f6c72e | 3274 | ret2 = probe_file__del_events(ufd, filter); |
dddc7ee3 | 3275 | if (ret2 < 0 && ret2 != -ENOENT) { |
307a464b | 3276 | ret = ret2; |
dddc7ee3 MH |
3277 | goto error; |
3278 | } | |
dddc7ee3 | 3279 | ret = 0; |
225466f1 SD |
3280 | |
3281 | error: | |
92f6c72e | 3282 | if (kfd >= 0) |
225466f1 | 3283 | close(kfd); |
92f6c72e | 3284 | if (ufd >= 0) |
225466f1 | 3285 | close(ufd); |
92f6c72e | 3286 | out: |
307a464b | 3287 | free(str); |
146a1439 MH |
3288 | |
3289 | return ret; | |
fa28244d | 3290 | } |
225466f1 | 3291 | |
2df58634 MH |
3292 | int show_available_funcs(const char *target, struct strfilter *_filter, |
3293 | bool user) | |
e80711ca | 3294 | { |
fd227598 | 3295 | struct rb_node *nd; |
e80711ca MH |
3296 | struct map *map; |
3297 | int ret; | |
3298 | ||
9bae1e8c | 3299 | ret = init_probe_symbol_maps(user); |
e80711ca MH |
3300 | if (ret < 0) |
3301 | return ret; | |
3302 | ||
2df58634 MH |
3303 | /* Get a symbol map */ |
3304 | if (user) | |
3305 | map = dso__new_map(target); | |
3306 | else | |
3307 | map = kernel_get_module_map(target); | |
e80711ca | 3308 | if (!map) { |
2df58634 | 3309 | pr_err("Failed to get a map for %s\n", (target) ? : "kernel"); |
e80711ca MH |
3310 | return -EINVAL; |
3311 | } | |
225466f1 | 3312 | |
fd227598 | 3313 | ret = map__load(map, NULL); |
e7049342 MH |
3314 | if (ret) { |
3315 | if (ret == -2) { | |
3316 | char *str = strfilter__string(_filter); | |
3317 | pr_err("Failed to find symbols matched to \"%s\"\n", | |
3318 | str); | |
3319 | free(str); | |
3320 | } else | |
3321 | pr_err("Failed to load symbols in %s\n", | |
3322 | (target) ? : "kernel"); | |
2df58634 MH |
3323 | goto end; |
3324 | } | |
3325 | if (!dso__sorted_by_name(map->dso, map->type)) | |
3326 | dso__sort_by_name(map->dso, map->type); | |
225466f1 | 3327 | |
2df58634 MH |
3328 | /* Show all (filtered) symbols */ |
3329 | setup_pager(); | |
fd227598 ACM |
3330 | |
3331 | for (nd = rb_first(&map->dso->symbol_names[map->type]); nd; nd = rb_next(nd)) { | |
3332 | struct symbol_name_rb_node *pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); | |
3333 | ||
3334 | if (strfilter__compare(_filter, pos->sym.name)) | |
3335 | printf("%s\n", pos->sym.name); | |
3336 | } | |
3337 | ||
2df58634 MH |
3338 | end: |
3339 | if (user) { | |
84c2cafa | 3340 | map__put(map); |
2df58634 | 3341 | } |
9bae1e8c | 3342 | exit_probe_symbol_maps(); |
225466f1 | 3343 | |
2df58634 | 3344 | return ret; |
225466f1 SD |
3345 | } |
3346 | ||
da15bd9d WN |
3347 | int copy_to_probe_trace_arg(struct probe_trace_arg *tvar, |
3348 | struct perf_probe_arg *pvar) | |
3349 | { | |
3350 | tvar->value = strdup(pvar->var); | |
3351 | if (tvar->value == NULL) | |
3352 | return -ENOMEM; | |
3353 | if (pvar->type) { | |
3354 | tvar->type = strdup(pvar->type); | |
3355 | if (tvar->type == NULL) | |
3356 | return -ENOMEM; | |
3357 | } | |
3358 | if (pvar->name) { | |
3359 | tvar->name = strdup(pvar->name); | |
3360 | if (tvar->name == NULL) | |
3361 | return -ENOMEM; | |
3362 | } else | |
3363 | tvar->name = NULL; | |
3364 | return 0; | |
3365 | } |