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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 | { | |
be39db9f | 113 | return machine__find_kernel_function_by_name(host_machine, name, mapp); |
469b9b88 MH |
114 | } |
115 | ||
8f33f7de MH |
116 | static struct symbol *__find_kernel_function(u64 addr, struct map **mapp) |
117 | { | |
be39db9f | 118 | return machine__find_kernel_function(host_machine, addr, mapp); |
8f33f7de MH |
119 | } |
120 | ||
121 | static struct ref_reloc_sym *kernel_get_ref_reloc_sym(void) | |
122 | { | |
123 | /* kmap->ref_reloc_sym should be set if host_machine is initialized */ | |
124 | struct kmap *kmap; | |
a5e813c6 | 125 | struct map *map = machine__kernel_map(host_machine); |
8f33f7de | 126 | |
be39db9f | 127 | if (map__load(map) < 0) |
8f33f7de MH |
128 | return NULL; |
129 | ||
77e65977 | 130 | kmap = map__kmap(map); |
ba92732e WN |
131 | if (!kmap) |
132 | return NULL; | |
8f33f7de MH |
133 | return kmap->ref_reloc_sym; |
134 | } | |
135 | ||
9b239a12 MH |
136 | static int kernel_get_symbol_address_by_name(const char *name, u64 *addr, |
137 | bool reloc, bool reladdr) | |
8f33f7de MH |
138 | { |
139 | struct ref_reloc_sym *reloc_sym; | |
140 | struct symbol *sym; | |
141 | struct map *map; | |
142 | ||
143 | /* ref_reloc_sym is just a label. Need a special fix*/ | |
144 | reloc_sym = kernel_get_ref_reloc_sym(); | |
145 | if (reloc_sym && strcmp(name, reloc_sym->name) == 0) | |
9b239a12 | 146 | *addr = (reloc) ? reloc_sym->addr : reloc_sym->unrelocated_addr; |
8f33f7de MH |
147 | else { |
148 | sym = __find_kernel_function_by_name(name, &map); | |
9b239a12 MH |
149 | if (!sym) |
150 | return -ENOENT; | |
151 | *addr = map->unmap_ip(map, sym->start) - | |
152 | ((reloc) ? 0 : map->reloc) - | |
153 | ((reladdr) ? map->start : 0); | |
8f33f7de MH |
154 | } |
155 | return 0; | |
156 | } | |
157 | ||
e80711ca MH |
158 | static struct map *kernel_get_module_map(const char *module) |
159 | { | |
ee45b6c2 | 160 | struct map_groups *grp = &host_machine->kmaps; |
1eee78ae | 161 | struct maps *maps = &grp->maps[MAP__FUNCTION]; |
4bb7123d | 162 | struct map *pos; |
e80711ca | 163 | |
14a8fd7c MH |
164 | /* A file path -- this is an offline module */ |
165 | if (module && strchr(module, '/')) | |
eebc509b | 166 | return dso__new_map(module); |
14a8fd7c | 167 | |
e80711ca MH |
168 | if (!module) |
169 | module = "kernel"; | |
170 | ||
4bb7123d | 171 | for (pos = maps__first(maps); pos; pos = map__next(pos)) { |
cb3f3378 | 172 | /* short_name is "[module]" */ |
e80711ca | 173 | if (strncmp(pos->dso->short_name + 1, module, |
cb3f3378 KK |
174 | pos->dso->short_name_len - 2) == 0 && |
175 | module[pos->dso->short_name_len - 2] == '\0') { | |
eebc509b | 176 | map__get(pos); |
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 | ||
fb7345bb MH |
192 | static int convert_exec_to_group(const char *exec, char **result) |
193 | { | |
194 | char *ptr1, *ptr2, *exec_copy; | |
195 | char buf[64]; | |
196 | int ret; | |
197 | ||
198 | exec_copy = strdup(exec); | |
199 | if (!exec_copy) | |
200 | return -ENOMEM; | |
201 | ||
202 | ptr1 = basename(exec_copy); | |
203 | if (!ptr1) { | |
204 | ret = -EINVAL; | |
205 | goto out; | |
206 | } | |
207 | ||
ead1a574 | 208 | for (ptr2 = ptr1; *ptr2 != '\0'; ptr2++) { |
35726d3a MH |
209 | if (!isalnum(*ptr2) && *ptr2 != '_') { |
210 | *ptr2 = '\0'; | |
211 | break; | |
212 | } | |
213 | } | |
214 | ||
fb7345bb MH |
215 | ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1); |
216 | if (ret < 0) | |
217 | goto out; | |
218 | ||
219 | *result = strdup(buf); | |
220 | ret = *result ? 0 : -ENOMEM; | |
221 | ||
222 | out: | |
223 | free(exec_copy); | |
224 | return ret; | |
225 | } | |
226 | ||
9b118aca MH |
227 | static void clear_perf_probe_point(struct perf_probe_point *pp) |
228 | { | |
229 | free(pp->file); | |
230 | free(pp->function); | |
231 | free(pp->lazy_line); | |
232 | } | |
233 | ||
eb948e50 MH |
234 | static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs) |
235 | { | |
236 | int i; | |
237 | ||
238 | for (i = 0; i < ntevs; i++) | |
239 | clear_probe_trace_event(tevs + i); | |
240 | } | |
241 | ||
b031220d MH |
242 | static bool kprobe_blacklist__listed(unsigned long address); |
243 | static bool kprobe_warn_out_range(const char *symbol, unsigned long address) | |
244 | { | |
9b239a12 MH |
245 | u64 etext_addr = 0; |
246 | int ret; | |
7c31bb8c | 247 | |
b031220d | 248 | /* Get the address of _etext for checking non-probable text symbol */ |
9b239a12 MH |
249 | ret = kernel_get_symbol_address_by_name("_etext", &etext_addr, |
250 | false, false); | |
7c31bb8c | 251 | |
9b239a12 | 252 | if (ret == 0 && etext_addr < address) |
b031220d MH |
253 | pr_warning("%s is out of .text, skip it.\n", symbol); |
254 | else if (kprobe_blacklist__listed(address)) | |
255 | pr_warning("%s is blacklisted function, skip it.\n", symbol); | |
256 | else | |
257 | return false; | |
258 | ||
259 | return true; | |
260 | } | |
261 | ||
c61fb959 RB |
262 | /* |
263 | * @module can be module name of module file path. In case of path, | |
264 | * inspect elf and find out what is actual module name. | |
265 | * Caller has to free mod_name after using it. | |
266 | */ | |
267 | static char *find_module_name(const char *module) | |
268 | { | |
269 | int fd; | |
270 | Elf *elf; | |
271 | GElf_Ehdr ehdr; | |
272 | GElf_Shdr shdr; | |
273 | Elf_Data *data; | |
274 | Elf_Scn *sec; | |
275 | char *mod_name = NULL; | |
1f2ed153 | 276 | int name_offset; |
c61fb959 RB |
277 | |
278 | fd = open(module, O_RDONLY); | |
279 | if (fd < 0) | |
280 | return NULL; | |
281 | ||
282 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
283 | if (elf == NULL) | |
284 | goto elf_err; | |
285 | ||
286 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
287 | goto ret_err; | |
288 | ||
289 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
290 | ".gnu.linkonce.this_module", NULL); | |
291 | if (!sec) | |
292 | goto ret_err; | |
293 | ||
294 | data = elf_getdata(sec, NULL); | |
295 | if (!data || !data->d_buf) | |
296 | goto ret_err; | |
297 | ||
1f2ed153 MH |
298 | /* |
299 | * NOTE: | |
300 | * '.gnu.linkonce.this_module' section of kernel module elf directly | |
301 | * maps to 'struct module' from linux/module.h. This section contains | |
302 | * actual module name which will be used by kernel after loading it. | |
303 | * But, we cannot use 'struct module' here since linux/module.h is not | |
304 | * exposed to user-space. Offset of 'name' has remained same from long | |
305 | * time, so hardcoding it here. | |
306 | */ | |
307 | if (ehdr.e_ident[EI_CLASS] == ELFCLASS32) | |
308 | name_offset = 12; | |
309 | else /* expect ELFCLASS64 by default */ | |
310 | name_offset = 24; | |
311 | ||
312 | mod_name = strdup((char *)data->d_buf + name_offset); | |
c61fb959 RB |
313 | |
314 | ret_err: | |
315 | elf_end(elf); | |
316 | elf_err: | |
317 | close(fd); | |
318 | return mod_name; | |
319 | } | |
320 | ||
89fe808a | 321 | #ifdef HAVE_DWARF_SUPPORT |
60fb7742 WN |
322 | |
323 | static int kernel_get_module_dso(const char *module, struct dso **pdso) | |
324 | { | |
325 | struct dso *dso; | |
326 | struct map *map; | |
327 | const char *vmlinux_name; | |
328 | int ret = 0; | |
329 | ||
330 | if (module) { | |
266fa2b2 ACM |
331 | char module_name[128]; |
332 | ||
333 | snprintf(module_name, sizeof(module_name), "[%s]", module); | |
334 | map = map_groups__find_by_name(&host_machine->kmaps, MAP__FUNCTION, module_name); | |
335 | if (map) { | |
336 | dso = map->dso; | |
337 | goto found; | |
60fb7742 WN |
338 | } |
339 | pr_debug("Failed to find module %s.\n", module); | |
340 | return -ENOENT; | |
341 | } | |
342 | ||
a5e813c6 | 343 | map = machine__kernel_map(host_machine); |
60fb7742 WN |
344 | dso = map->dso; |
345 | ||
346 | vmlinux_name = symbol_conf.vmlinux_name; | |
347 | dso->load_errno = 0; | |
348 | if (vmlinux_name) | |
be39db9f | 349 | ret = dso__load_vmlinux(dso, map, vmlinux_name, false); |
60fb7742 | 350 | else |
be39db9f | 351 | ret = dso__load_vmlinux_path(dso, map); |
60fb7742 WN |
352 | found: |
353 | *pdso = dso; | |
354 | return ret; | |
355 | } | |
356 | ||
9b118aca MH |
357 | /* |
358 | * Some binaries like glibc have special symbols which are on the symbol | |
359 | * table, but not in the debuginfo. If we can find the address of the | |
360 | * symbol from map, we can translate the address back to the probe point. | |
361 | */ | |
362 | static int find_alternative_probe_point(struct debuginfo *dinfo, | |
363 | struct perf_probe_point *pp, | |
364 | struct perf_probe_point *result, | |
365 | const char *target, bool uprobes) | |
366 | { | |
367 | struct map *map = NULL; | |
368 | struct symbol *sym; | |
369 | u64 address = 0; | |
370 | int ret = -ENOENT; | |
371 | ||
372 | /* This can work only for function-name based one */ | |
373 | if (!pp->function || pp->file) | |
374 | return -ENOTSUP; | |
375 | ||
376 | map = get_target_map(target, uprobes); | |
377 | if (!map) | |
378 | return -EINVAL; | |
379 | ||
380 | /* Find the address of given function */ | |
381 | map__for_each_symbol_by_name(map, pp->function, sym) { | |
e6d7c91c MH |
382 | if (uprobes) |
383 | address = sym->start; | |
384 | else | |
8e34189b | 385 | address = map->unmap_ip(map, sym->start) - map->reloc; |
e578da3b | 386 | break; |
9b118aca MH |
387 | } |
388 | if (!address) { | |
389 | ret = -ENOENT; | |
390 | goto out; | |
391 | } | |
f6c15621 WN |
392 | pr_debug("Symbol %s address found : %" PRIx64 "\n", |
393 | pp->function, address); | |
9b118aca MH |
394 | |
395 | ret = debuginfo__find_probe_point(dinfo, (unsigned long)address, | |
396 | result); | |
397 | if (ret <= 0) | |
398 | ret = (!ret) ? -ENOENT : ret; | |
399 | else { | |
400 | result->offset += pp->offset; | |
401 | result->line += pp->line; | |
9d7b45c5 | 402 | result->retprobe = pp->retprobe; |
9b118aca MH |
403 | ret = 0; |
404 | } | |
405 | ||
406 | out: | |
eebc509b | 407 | map__put(map); |
9b118aca MH |
408 | return ret; |
409 | ||
410 | } | |
411 | ||
412 | static int get_alternative_probe_event(struct debuginfo *dinfo, | |
413 | struct perf_probe_event *pev, | |
44225521 | 414 | struct perf_probe_point *tmp) |
9b118aca MH |
415 | { |
416 | int ret; | |
417 | ||
418 | memcpy(tmp, &pev->point, sizeof(*tmp)); | |
419 | memset(&pev->point, 0, sizeof(pev->point)); | |
420 | ret = find_alternative_probe_point(dinfo, tmp, &pev->point, | |
44225521 | 421 | pev->target, pev->uprobes); |
9b118aca MH |
422 | if (ret < 0) |
423 | memcpy(&pev->point, tmp, sizeof(*tmp)); | |
424 | ||
425 | return ret; | |
426 | } | |
a15ad2f5 | 427 | |
811dd2ae MH |
428 | static int get_alternative_line_range(struct debuginfo *dinfo, |
429 | struct line_range *lr, | |
430 | const char *target, bool user) | |
431 | { | |
6d4a4896 DA |
432 | struct perf_probe_point pp = { .function = lr->function, |
433 | .file = lr->file, | |
434 | .line = lr->start }; | |
435 | struct perf_probe_point result; | |
811dd2ae MH |
436 | int ret, len = 0; |
437 | ||
6d4a4896 DA |
438 | memset(&result, 0, sizeof(result)); |
439 | ||
811dd2ae MH |
440 | if (lr->end != INT_MAX) |
441 | len = lr->end - lr->start; | |
442 | ret = find_alternative_probe_point(dinfo, &pp, &result, | |
443 | target, user); | |
444 | if (!ret) { | |
445 | lr->function = result.function; | |
446 | lr->file = result.file; | |
447 | lr->start = result.line; | |
448 | if (lr->end != INT_MAX) | |
449 | lr->end = lr->start + len; | |
450 | clear_perf_probe_point(&pp); | |
451 | } | |
452 | return ret; | |
453 | } | |
454 | ||
ff741783 | 455 | /* Open new debuginfo of given module */ |
92561cb7 | 456 | static struct debuginfo *open_debuginfo(const char *module, bool silent) |
e0faa8d3 | 457 | { |
a15ad2f5 | 458 | const char *path = module; |
419e8738 MH |
459 | char reason[STRERR_BUFSIZE]; |
460 | struct debuginfo *ret = NULL; | |
461 | struct dso *dso = NULL; | |
462 | int err; | |
ff741783 | 463 | |
a15ad2f5 | 464 | if (!module || !strchr(module, '/')) { |
419e8738 MH |
465 | err = kernel_get_module_dso(module, &dso); |
466 | if (err < 0) { | |
467 | if (!dso || dso->load_errno == 0) { | |
c8b5f2c9 | 468 | if (!str_error_r(-err, reason, STRERR_BUFSIZE)) |
419e8738 MH |
469 | strcpy(reason, "(unknown)"); |
470 | } else | |
471 | dso__strerror_load(dso, reason, STRERR_BUFSIZE); | |
92561cb7 | 472 | if (!silent) |
419e8738 MH |
473 | pr_err("Failed to find the path for %s: %s\n", |
474 | module ?: "kernel", reason); | |
14a8fd7c MH |
475 | return NULL; |
476 | } | |
419e8738 | 477 | path = dso->long_name; |
e0faa8d3 | 478 | } |
92561cb7 MH |
479 | ret = debuginfo__new(path); |
480 | if (!ret && !silent) { | |
481 | pr_warning("The %s file has no debug information.\n", path); | |
482 | if (!module || !strtailcmp(path, ".ko")) | |
483 | pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, "); | |
484 | else | |
485 | pr_warning("Rebuild with -g, "); | |
486 | pr_warning("or install an appropriate debuginfo package.\n"); | |
487 | } | |
488 | return ret; | |
e0faa8d3 | 489 | } |
4b4da7f7 | 490 | |
7737af01 MH |
491 | /* For caching the last debuginfo */ |
492 | static struct debuginfo *debuginfo_cache; | |
493 | static char *debuginfo_cache_path; | |
494 | ||
495 | static struct debuginfo *debuginfo_cache__open(const char *module, bool silent) | |
496 | { | |
20f49859 MH |
497 | const char *path = module; |
498 | ||
499 | /* If the module is NULL, it should be the kernel. */ | |
500 | if (!module) | |
501 | path = "kernel"; | |
502 | ||
503 | if (debuginfo_cache_path && !strcmp(debuginfo_cache_path, path)) | |
7737af01 MH |
504 | goto out; |
505 | ||
506 | /* Copy module path */ | |
507 | free(debuginfo_cache_path); | |
20f49859 MH |
508 | debuginfo_cache_path = strdup(path); |
509 | if (!debuginfo_cache_path) { | |
510 | debuginfo__delete(debuginfo_cache); | |
511 | debuginfo_cache = NULL; | |
512 | goto out; | |
7737af01 MH |
513 | } |
514 | ||
515 | debuginfo_cache = open_debuginfo(module, silent); | |
516 | if (!debuginfo_cache) | |
517 | zfree(&debuginfo_cache_path); | |
518 | out: | |
519 | return debuginfo_cache; | |
520 | } | |
521 | ||
522 | static void debuginfo_cache__exit(void) | |
523 | { | |
524 | debuginfo__delete(debuginfo_cache); | |
525 | debuginfo_cache = NULL; | |
526 | zfree(&debuginfo_cache_path); | |
527 | } | |
528 | ||
92561cb7 | 529 | |
99ca4233 MH |
530 | static int get_text_start_address(const char *exec, unsigned long *address) |
531 | { | |
532 | Elf *elf; | |
533 | GElf_Ehdr ehdr; | |
534 | GElf_Shdr shdr; | |
535 | int fd, ret = -ENOENT; | |
536 | ||
537 | fd = open(exec, O_RDONLY); | |
538 | if (fd < 0) | |
539 | return -errno; | |
540 | ||
541 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
062d6c2a MH |
542 | if (elf == NULL) { |
543 | ret = -EINVAL; | |
544 | goto out_close; | |
545 | } | |
99ca4233 MH |
546 | |
547 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
548 | goto out; | |
549 | ||
550 | if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL)) | |
551 | goto out; | |
552 | ||
553 | *address = shdr.sh_addr - shdr.sh_offset; | |
554 | ret = 0; | |
555 | out: | |
556 | elf_end(elf); | |
062d6c2a MH |
557 | out_close: |
558 | close(fd); | |
559 | ||
99ca4233 MH |
560 | return ret; |
561 | } | |
562 | ||
5a6f6314 MH |
563 | /* |
564 | * Convert trace point to probe point with debuginfo | |
565 | */ | |
566 | static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp, | |
567 | struct perf_probe_point *pp, | |
568 | bool is_kprobe) | |
569 | { | |
570 | struct debuginfo *dinfo = NULL; | |
571 | unsigned long stext = 0; | |
572 | u64 addr = tp->address; | |
573 | int ret = -ENOENT; | |
574 | ||
575 | /* convert the address to dwarf address */ | |
576 | if (!is_kprobe) { | |
577 | if (!addr) { | |
578 | ret = -EINVAL; | |
579 | goto error; | |
580 | } | |
581 | ret = get_text_start_address(tp->module, &stext); | |
582 | if (ret < 0) | |
583 | goto error; | |
584 | addr += stext; | |
e486367f | 585 | } else if (tp->symbol) { |
9b239a12 MH |
586 | /* If the module is given, this returns relative address */ |
587 | ret = kernel_get_symbol_address_by_name(tp->symbol, &addr, | |
588 | false, !!tp->module); | |
589 | if (ret != 0) | |
5a6f6314 MH |
590 | goto error; |
591 | addr += tp->offset; | |
592 | } | |
593 | ||
594 | pr_debug("try to find information at %" PRIx64 " in %s\n", addr, | |
595 | tp->module ? : "kernel"); | |
596 | ||
7737af01 MH |
597 | dinfo = debuginfo_cache__open(tp->module, verbose == 0); |
598 | if (dinfo) | |
5a6f6314 MH |
599 | ret = debuginfo__find_probe_point(dinfo, |
600 | (unsigned long)addr, pp); | |
7737af01 | 601 | else |
5a6f6314 | 602 | ret = -ENOENT; |
5a6f6314 MH |
603 | |
604 | if (ret > 0) { | |
605 | pp->retprobe = tp->retprobe; | |
606 | return 0; | |
607 | } | |
608 | error: | |
609 | pr_debug("Failed to find corresponding probes from debuginfo.\n"); | |
610 | return ret ? : -ENOENT; | |
611 | } | |
612 | ||
3e96dac7 MH |
613 | /* Adjust symbol name and address */ |
614 | static int post_process_probe_trace_point(struct probe_trace_point *tp, | |
615 | struct map *map, unsigned long offs) | |
616 | { | |
617 | struct symbol *sym; | |
618 | u64 addr = tp->address + tp->offset - offs; | |
619 | ||
620 | sym = map__find_symbol(map, addr); | |
621 | if (!sym) | |
622 | return -ENOENT; | |
623 | ||
624 | if (strcmp(sym->name, tp->symbol)) { | |
625 | /* If we have no realname, use symbol for it */ | |
626 | if (!tp->realname) | |
627 | tp->realname = tp->symbol; | |
628 | else | |
629 | free(tp->symbol); | |
630 | tp->symbol = strdup(sym->name); | |
631 | if (!tp->symbol) | |
632 | return -ENOMEM; | |
633 | } | |
634 | tp->offset = addr - sym->start; | |
635 | tp->address -= offs; | |
636 | ||
637 | return 0; | |
638 | } | |
639 | ||
8a937a25 MH |
640 | /* |
641 | * Rename DWARF symbols to ELF symbols -- gcc sometimes optimizes functions | |
642 | * and generate new symbols with suffixes such as .constprop.N or .isra.N | |
643 | * etc. Since those symbols are not recorded in DWARF, we have to find | |
644 | * correct generated symbols from offline ELF binary. | |
645 | * For online kernel or uprobes we don't need this because those are | |
646 | * rebased on _text, or already a section relative address. | |
647 | */ | |
648 | static int | |
649 | post_process_offline_probe_trace_events(struct probe_trace_event *tevs, | |
650 | int ntevs, const char *pathname) | |
651 | { | |
8a937a25 MH |
652 | struct map *map; |
653 | unsigned long stext = 0; | |
3e96dac7 | 654 | int i, ret = 0; |
8a937a25 MH |
655 | |
656 | /* Prepare a map for offline binary */ | |
657 | map = dso__new_map(pathname); | |
658 | if (!map || get_text_start_address(pathname, &stext) < 0) { | |
659 | pr_warning("Failed to get ELF symbols for %s\n", pathname); | |
660 | return -EINVAL; | |
661 | } | |
662 | ||
663 | for (i = 0; i < ntevs; i++) { | |
3e96dac7 MH |
664 | ret = post_process_probe_trace_point(&tevs[i].point, |
665 | map, stext); | |
666 | if (ret < 0) | |
667 | break; | |
8a937a25 MH |
668 | } |
669 | map__put(map); | |
670 | ||
3e96dac7 | 671 | return ret; |
8a937a25 MH |
672 | } |
673 | ||
fb7345bb MH |
674 | static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs, |
675 | int ntevs, const char *exec) | |
676 | { | |
677 | int i, ret = 0; | |
eb948e50 | 678 | unsigned long stext = 0; |
fb7345bb MH |
679 | |
680 | if (!exec) | |
681 | return 0; | |
682 | ||
683 | ret = get_text_start_address(exec, &stext); | |
684 | if (ret < 0) | |
685 | return ret; | |
686 | ||
687 | for (i = 0; i < ntevs && ret >= 0; i++) { | |
981a2379 | 688 | /* point.address is the addres of point.symbol + point.offset */ |
eb948e50 | 689 | tevs[i].point.address -= stext; |
fb7345bb | 690 | tevs[i].point.module = strdup(exec); |
eb948e50 | 691 | if (!tevs[i].point.module) { |
fb7345bb MH |
692 | ret = -ENOMEM; |
693 | break; | |
694 | } | |
695 | tevs[i].uprobes = true; | |
696 | } | |
697 | ||
698 | return ret; | |
699 | } | |
700 | ||
613f050d MH |
701 | static int |
702 | post_process_module_probe_trace_events(struct probe_trace_event *tevs, | |
703 | int ntevs, const char *module, | |
704 | struct debuginfo *dinfo) | |
190b57fc | 705 | { |
613f050d | 706 | Dwarf_Addr text_offs = 0; |
14a8fd7c | 707 | int i, ret = 0; |
63a29613 | 708 | char *mod_name = NULL; |
613f050d | 709 | struct map *map; |
14a8fd7c MH |
710 | |
711 | if (!module) | |
712 | return 0; | |
713 | ||
613f050d MH |
714 | map = get_target_map(module, false); |
715 | if (!map || debuginfo__get_text_offset(dinfo, &text_offs, true) < 0) { | |
716 | pr_warning("Failed to get ELF symbols for %s\n", module); | |
717 | return -EINVAL; | |
718 | } | |
14a8fd7c | 719 | |
613f050d | 720 | mod_name = find_module_name(module); |
190b57fc | 721 | for (i = 0; i < ntevs; i++) { |
613f050d MH |
722 | ret = post_process_probe_trace_point(&tevs[i].point, |
723 | map, (unsigned long)text_offs); | |
724 | if (ret < 0) | |
725 | break; | |
63a29613 RB |
726 | tevs[i].point.module = |
727 | strdup(mod_name ? mod_name : module); | |
14a8fd7c MH |
728 | if (!tevs[i].point.module) { |
729 | ret = -ENOMEM; | |
730 | break; | |
731 | } | |
190b57fc | 732 | } |
14a8fd7c | 733 | |
63a29613 | 734 | free(mod_name); |
613f050d MH |
735 | map__put(map); |
736 | ||
14a8fd7c | 737 | return ret; |
190b57fc MH |
738 | } |
739 | ||
d820456d RB |
740 | static int |
741 | post_process_kernel_probe_trace_events(struct probe_trace_event *tevs, | |
742 | int ntevs) | |
dfef99cd MH |
743 | { |
744 | struct ref_reloc_sym *reloc_sym; | |
745 | char *tmp; | |
5a51fcd1 | 746 | int i, skipped = 0; |
dfef99cd | 747 | |
428aff82 MH |
748 | /* Skip post process if the target is an offline kernel */ |
749 | if (symbol_conf.ignore_vmlinux_buildid) | |
8a937a25 MH |
750 | return post_process_offline_probe_trace_events(tevs, ntevs, |
751 | symbol_conf.vmlinux_name); | |
428aff82 | 752 | |
8f33f7de | 753 | reloc_sym = kernel_get_ref_reloc_sym(); |
dfef99cd MH |
754 | if (!reloc_sym) { |
755 | pr_warning("Relocated base symbol is not found!\n"); | |
756 | return -EINVAL; | |
757 | } | |
758 | ||
759 | for (i = 0; i < ntevs; i++) { | |
b031220d MH |
760 | if (!tevs[i].point.address || tevs[i].point.retprobe) |
761 | continue; | |
762 | /* If we found a wrong one, mark it by NULL symbol */ | |
763 | if (kprobe_warn_out_range(tevs[i].point.symbol, | |
764 | tevs[i].point.address)) { | |
765 | tmp = NULL; | |
766 | skipped++; | |
767 | } else { | |
768 | tmp = strdup(reloc_sym->name); | |
769 | if (!tmp) | |
770 | return -ENOMEM; | |
dfef99cd | 771 | } |
b031220d MH |
772 | /* If we have no realname, use symbol for it */ |
773 | if (!tevs[i].point.realname) | |
774 | tevs[i].point.realname = tevs[i].point.symbol; | |
775 | else | |
776 | free(tevs[i].point.symbol); | |
777 | tevs[i].point.symbol = tmp; | |
778 | tevs[i].point.offset = tevs[i].point.address - | |
779 | reloc_sym->unrelocated_addr; | |
dfef99cd | 780 | } |
5a51fcd1 | 781 | return skipped; |
dfef99cd MH |
782 | } |
783 | ||
99e608b5 RB |
784 | void __weak |
785 | arch__post_process_probe_trace_events(struct perf_probe_event *pev __maybe_unused, | |
786 | int ntevs __maybe_unused) | |
787 | { | |
788 | } | |
789 | ||
d820456d | 790 | /* Post processing the probe events */ |
99e608b5 RB |
791 | static int post_process_probe_trace_events(struct perf_probe_event *pev, |
792 | struct probe_trace_event *tevs, | |
d820456d | 793 | int ntevs, const char *module, |
613f050d | 794 | bool uprobe, struct debuginfo *dinfo) |
d820456d | 795 | { |
99e608b5 | 796 | int ret; |
d820456d | 797 | |
99e608b5 RB |
798 | if (uprobe) |
799 | ret = add_exec_to_probe_trace_events(tevs, ntevs, module); | |
800 | else if (module) | |
d820456d | 801 | /* Currently ref_reloc_sym based probe is not for drivers */ |
613f050d MH |
802 | ret = post_process_module_probe_trace_events(tevs, ntevs, |
803 | module, dinfo); | |
99e608b5 RB |
804 | else |
805 | ret = post_process_kernel_probe_trace_events(tevs, ntevs); | |
d820456d | 806 | |
99e608b5 RB |
807 | if (ret >= 0) |
808 | arch__post_process_probe_trace_events(pev, ntevs); | |
809 | ||
810 | return ret; | |
d820456d RB |
811 | } |
812 | ||
4b4da7f7 | 813 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 814 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
ddb2f58f | 815 | struct probe_trace_event **tevs) |
4b4da7f7 MH |
816 | { |
817 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
9b118aca | 818 | struct perf_probe_point tmp; |
225466f1 | 819 | struct debuginfo *dinfo; |
190b57fc | 820 | int ntevs, ret = 0; |
4b4da7f7 | 821 | |
44225521 | 822 | dinfo = open_debuginfo(pev->target, !need_dwarf); |
ff741783 | 823 | if (!dinfo) { |
92561cb7 | 824 | if (need_dwarf) |
ff741783 | 825 | return -ENOENT; |
ff741783 | 826 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
827 | return 0; |
828 | } | |
829 | ||
dfef99cd | 830 | pr_debug("Try to find probe point from debuginfo.\n"); |
ff741783 | 831 | /* Searching trace events corresponding to a probe event */ |
ddb2f58f | 832 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs); |
ff741783 | 833 | |
9b118aca | 834 | if (ntevs == 0) { /* Not found, retry with an alternative */ |
44225521 | 835 | ret = get_alternative_probe_event(dinfo, pev, &tmp); |
9b118aca | 836 | if (!ret) { |
ddb2f58f | 837 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs); |
9b118aca MH |
838 | /* |
839 | * Write back to the original probe_event for | |
840 | * setting appropriate (user given) event name | |
841 | */ | |
842 | clear_perf_probe_point(&pev->point); | |
843 | memcpy(&pev->point, &tmp, sizeof(tmp)); | |
844 | } | |
845 | } | |
846 | ||
146a1439 | 847 | if (ntevs > 0) { /* Succeeded to find trace events */ |
dfef99cd | 848 | pr_debug("Found %d probe_trace_events.\n", ntevs); |
99e608b5 | 849 | ret = post_process_probe_trace_events(pev, *tevs, ntevs, |
613f050d | 850 | pev->target, pev->uprobes, dinfo); |
5a51fcd1 | 851 | if (ret < 0 || ret == ntevs) { |
613f050d | 852 | pr_debug("Post processing failed or all events are skipped. (%d)\n", ret); |
981d05ad MH |
853 | clear_probe_trace_events(*tevs, ntevs); |
854 | zfree(tevs); | |
613f050d | 855 | ntevs = 0; |
981d05ad | 856 | } |
146a1439 | 857 | } |
4b4da7f7 | 858 | |
613f050d MH |
859 | debuginfo__delete(dinfo); |
860 | ||
146a1439 | 861 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
0687eba7 | 862 | pr_warning("Probe point '%s' not found.\n", |
146a1439 | 863 | synthesize_perf_probe_point(&pev->point)); |
0687eba7 | 864 | return -ENOENT; |
613f050d MH |
865 | } else if (ntevs < 0) { |
866 | /* Error path : ntevs < 0 */ | |
867 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); | |
1c0bd0e8 WN |
868 | if (ntevs == -EBADF) |
869 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
870 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
15eca306 | 871 | if (!need_dwarf) { |
0e43e5d2 | 872 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
873 | return 0; |
874 | } | |
4b4da7f7 | 875 | } |
15eca306 | 876 | return ntevs; |
4b4da7f7 MH |
877 | } |
878 | ||
879 | #define LINEBUF_SIZE 256 | |
880 | #define NR_ADDITIONAL_LINES 2 | |
881 | ||
fde52dbd | 882 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 | 883 | { |
5f03cba4 | 884 | char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE]; |
befe3414 FBH |
885 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
886 | const char *prefix = NULL; | |
4b4da7f7 | 887 | |
befe3414 | 888 | do { |
4b4da7f7 MH |
889 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
890 | goto error; | |
befe3414 FBH |
891 | if (skip) |
892 | continue; | |
893 | if (!prefix) { | |
894 | prefix = show_num ? "%7d " : " "; | |
895 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 896 | } |
befe3414 FBH |
897 | color_fprintf(stdout, color, "%s", buf); |
898 | ||
899 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 900 | |
fde52dbd | 901 | return 1; |
4b4da7f7 | 902 | error: |
fde52dbd | 903 | if (ferror(fp)) { |
5f03cba4 | 904 | pr_warning("File read error: %s\n", |
c8b5f2c9 | 905 | str_error_r(errno, sbuf, sizeof(sbuf))); |
fde52dbd FBH |
906 | return -1; |
907 | } | |
908 | return 0; | |
909 | } | |
146a1439 | 910 | |
fde52dbd FBH |
911 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
912 | { | |
913 | int rv = __show_one_line(fp, l, skip, show_num); | |
914 | if (rv == 0) { | |
915 | pr_warning("Source file is shorter than expected.\n"); | |
916 | rv = -1; | |
917 | } | |
918 | return rv; | |
4b4da7f7 MH |
919 | } |
920 | ||
fde52dbd FBH |
921 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
922 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
923 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
924 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
925 | ||
4b4da7f7 MH |
926 | /* |
927 | * Show line-range always requires debuginfo to find source file and | |
928 | * line number. | |
929 | */ | |
811dd2ae MH |
930 | static int __show_line_range(struct line_range *lr, const char *module, |
931 | bool user) | |
4b4da7f7 | 932 | { |
d3b63d7a | 933 | int l = 1; |
5a62257a | 934 | struct int_node *ln; |
ff741783 | 935 | struct debuginfo *dinfo; |
4b4da7f7 | 936 | FILE *fp; |
ff741783 | 937 | int ret; |
7cf0b79e | 938 | char *tmp; |
5f03cba4 | 939 | char sbuf[STRERR_BUFSIZE]; |
4b4da7f7 MH |
940 | |
941 | /* Search a line range */ | |
92561cb7 MH |
942 | dinfo = open_debuginfo(module, false); |
943 | if (!dinfo) | |
ff741783 | 944 | return -ENOENT; |
146a1439 | 945 | |
ff741783 | 946 | ret = debuginfo__find_line_range(dinfo, lr); |
811dd2ae MH |
947 | if (!ret) { /* Not found, retry with an alternative */ |
948 | ret = get_alternative_line_range(dinfo, lr, module, user); | |
949 | if (!ret) | |
950 | ret = debuginfo__find_line_range(dinfo, lr); | |
951 | } | |
ff741783 | 952 | debuginfo__delete(dinfo); |
5ee05b88 | 953 | if (ret == 0 || ret == -ENOENT) { |
146a1439 MH |
954 | pr_warning("Specified source line is not found.\n"); |
955 | return -ENOENT; | |
956 | } else if (ret < 0) { | |
5ee05b88 | 957 | pr_warning("Debuginfo analysis failed.\n"); |
146a1439 MH |
958 | return ret; |
959 | } | |
4b4da7f7 | 960 | |
7cf0b79e MH |
961 | /* Convert source file path */ |
962 | tmp = lr->path; | |
6a330a3c | 963 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
a78604de HK |
964 | |
965 | /* Free old path when new path is assigned */ | |
966 | if (tmp != lr->path) | |
967 | free(tmp); | |
968 | ||
7cf0b79e | 969 | if (ret < 0) { |
5ee05b88 | 970 | pr_warning("Failed to find source file path.\n"); |
7cf0b79e MH |
971 | return ret; |
972 | } | |
973 | ||
4b4da7f7 MH |
974 | setup_pager(); |
975 | ||
976 | if (lr->function) | |
8737ebde | 977 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
978 | lr->start - lr->offset); |
979 | else | |
62c15fc4 | 980 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
981 | |
982 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
983 | if (fp == NULL) { |
984 | pr_warning("Failed to open %s: %s\n", lr->path, | |
c8b5f2c9 | 985 | str_error_r(errno, sbuf, sizeof(sbuf))); |
146a1439 MH |
986 | return -errno; |
987 | } | |
4b4da7f7 | 988 | /* Skip to starting line number */ |
44b81e92 | 989 | while (l < lr->start) { |
fde52dbd | 990 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
991 | if (ret < 0) |
992 | goto end; | |
993 | } | |
4b4da7f7 | 994 | |
10daf4d0 | 995 | intlist__for_each_entry(ln, lr->line_list) { |
5a62257a | 996 | for (; ln->i > l; l++) { |
fde52dbd | 997 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
998 | if (ret < 0) |
999 | goto end; | |
1000 | } | |
fde52dbd | 1001 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
1002 | if (ret < 0) |
1003 | goto end; | |
4b4da7f7 MH |
1004 | } |
1005 | ||
1006 | if (lr->end == INT_MAX) | |
1007 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
1008 | while (l <= lr->end) { |
1009 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
1010 | if (ret <= 0) | |
44b81e92 FBH |
1011 | break; |
1012 | } | |
146a1439 | 1013 | end: |
4b4da7f7 | 1014 | fclose(fp); |
146a1439 | 1015 | return ret; |
4b4da7f7 MH |
1016 | } |
1017 | ||
2b394bc4 | 1018 | int show_line_range(struct line_range *lr, const char *module, bool user) |
ee45b6c2 MH |
1019 | { |
1020 | int ret; | |
1021 | ||
9bae1e8c | 1022 | ret = init_probe_symbol_maps(user); |
ee45b6c2 MH |
1023 | if (ret < 0) |
1024 | return ret; | |
811dd2ae | 1025 | ret = __show_line_range(lr, module, user); |
9bae1e8c | 1026 | exit_probe_symbol_maps(); |
ee45b6c2 MH |
1027 | |
1028 | return ret; | |
1029 | } | |
1030 | ||
ff741783 MH |
1031 | static int show_available_vars_at(struct debuginfo *dinfo, |
1032 | struct perf_probe_event *pev, | |
ddb2f58f | 1033 | struct strfilter *_filter) |
cf6eb489 MH |
1034 | { |
1035 | char *buf; | |
bd09d7b5 | 1036 | int ret, i, nvars; |
cf6eb489 MH |
1037 | struct str_node *node; |
1038 | struct variable_list *vls = NULL, *vl; | |
9b118aca | 1039 | struct perf_probe_point tmp; |
bd09d7b5 | 1040 | const char *var; |
cf6eb489 MH |
1041 | |
1042 | buf = synthesize_perf_probe_point(&pev->point); | |
1043 | if (!buf) | |
1044 | return -EINVAL; | |
1045 | pr_debug("Searching variables at %s\n", buf); | |
1046 | ||
ddb2f58f | 1047 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls); |
9b118aca | 1048 | if (!ret) { /* Not found, retry with an alternative */ |
44225521 | 1049 | ret = get_alternative_probe_event(dinfo, pev, &tmp); |
9b118aca MH |
1050 | if (!ret) { |
1051 | ret = debuginfo__find_available_vars_at(dinfo, pev, | |
ddb2f58f | 1052 | &vls); |
9b118aca MH |
1053 | /* Release the old probe_point */ |
1054 | clear_perf_probe_point(&tmp); | |
1055 | } | |
1056 | } | |
bd09d7b5 | 1057 | if (ret <= 0) { |
69e96eaa MH |
1058 | if (ret == 0 || ret == -ENOENT) { |
1059 | pr_err("Failed to find the address of %s\n", buf); | |
1060 | ret = -ENOENT; | |
1061 | } else | |
1062 | pr_warning("Debuginfo analysis failed.\n"); | |
bd09d7b5 MH |
1063 | goto end; |
1064 | } | |
69e96eaa | 1065 | |
bd09d7b5 MH |
1066 | /* Some variables are found */ |
1067 | fprintf(stdout, "Available variables at %s\n", buf); | |
1068 | for (i = 0; i < ret; i++) { | |
1069 | vl = &vls[i]; | |
1070 | /* | |
1071 | * A probe point might be converted to | |
1072 | * several trace points. | |
1073 | */ | |
1074 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
1075 | vl->point.offset); | |
74cf249d | 1076 | zfree(&vl->point.symbol); |
bd09d7b5 MH |
1077 | nvars = 0; |
1078 | if (vl->vars) { | |
602a1f4d | 1079 | strlist__for_each_entry(node, vl->vars) { |
bd09d7b5 MH |
1080 | var = strchr(node->s, '\t') + 1; |
1081 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 1082 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
1083 | nvars++; |
1084 | } | |
1085 | } | |
1086 | strlist__delete(vl->vars); | |
cf6eb489 | 1087 | } |
bd09d7b5 MH |
1088 | if (nvars == 0) |
1089 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
1090 | } | |
1091 | free(vls); | |
1092 | end: | |
cf6eb489 MH |
1093 | free(buf); |
1094 | return ret; | |
1095 | } | |
1096 | ||
1097 | /* Show available variables on given probe point */ | |
1098 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
ddb2f58f | 1099 | struct strfilter *_filter) |
cf6eb489 | 1100 | { |
ff741783 MH |
1101 | int i, ret = 0; |
1102 | struct debuginfo *dinfo; | |
cf6eb489 | 1103 | |
9bae1e8c | 1104 | ret = init_probe_symbol_maps(pevs->uprobes); |
cf6eb489 MH |
1105 | if (ret < 0) |
1106 | return ret; | |
1107 | ||
44225521 | 1108 | dinfo = open_debuginfo(pevs->target, false); |
ff741783 | 1109 | if (!dinfo) { |
ee45b6c2 MH |
1110 | ret = -ENOENT; |
1111 | goto out; | |
ff741783 MH |
1112 | } |
1113 | ||
cf6eb489 MH |
1114 | setup_pager(); |
1115 | ||
ff741783 | 1116 | for (i = 0; i < npevs && ret >= 0; i++) |
ddb2f58f | 1117 | ret = show_available_vars_at(dinfo, &pevs[i], _filter); |
ff741783 MH |
1118 | |
1119 | debuginfo__delete(dinfo); | |
ee45b6c2 | 1120 | out: |
9bae1e8c | 1121 | exit_probe_symbol_maps(); |
cf6eb489 MH |
1122 | return ret; |
1123 | } | |
1124 | ||
89fe808a | 1125 | #else /* !HAVE_DWARF_SUPPORT */ |
4b4da7f7 | 1126 | |
7737af01 MH |
1127 | static void debuginfo_cache__exit(void) |
1128 | { | |
1129 | } | |
1130 | ||
5a6f6314 MH |
1131 | static int |
1132 | find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused, | |
1133 | struct perf_probe_point *pp __maybe_unused, | |
1134 | bool is_kprobe __maybe_unused) | |
4b4da7f7 | 1135 | { |
5a6f6314 | 1136 | return -ENOSYS; |
4b4da7f7 MH |
1137 | } |
1138 | ||
0e60836b | 1139 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
ddb2f58f | 1140 | struct probe_trace_event **tevs __maybe_unused) |
4b4da7f7 | 1141 | { |
146a1439 MH |
1142 | if (perf_probe_event_need_dwarf(pev)) { |
1143 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
1144 | return -ENOSYS; | |
1145 | } | |
225466f1 | 1146 | |
4b4da7f7 MH |
1147 | return 0; |
1148 | } | |
1149 | ||
1d037ca1 | 1150 | int show_line_range(struct line_range *lr __maybe_unused, |
2b394bc4 MH |
1151 | const char *module __maybe_unused, |
1152 | bool user __maybe_unused) | |
4b4da7f7 | 1153 | { |
146a1439 MH |
1154 | pr_warning("Debuginfo-analysis is not supported.\n"); |
1155 | return -ENOSYS; | |
4b4da7f7 MH |
1156 | } |
1157 | ||
1d037ca1 | 1158 | int show_available_vars(struct perf_probe_event *pevs __maybe_unused, |
ddb2f58f MH |
1159 | int npevs __maybe_unused, |
1160 | struct strfilter *filter __maybe_unused) | |
cf6eb489 MH |
1161 | { |
1162 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
1163 | return -ENOSYS; | |
1164 | } | |
e0faa8d3 MH |
1165 | #endif |
1166 | ||
e53b00d3 MH |
1167 | void line_range__clear(struct line_range *lr) |
1168 | { | |
e53b00d3 MH |
1169 | free(lr->function); |
1170 | free(lr->file); | |
1171 | free(lr->path); | |
1172 | free(lr->comp_dir); | |
5a62257a | 1173 | intlist__delete(lr->line_list); |
e53b00d3 MH |
1174 | memset(lr, 0, sizeof(*lr)); |
1175 | } | |
1176 | ||
5a62257a | 1177 | int line_range__init(struct line_range *lr) |
e53b00d3 MH |
1178 | { |
1179 | memset(lr, 0, sizeof(*lr)); | |
5a62257a MH |
1180 | lr->line_list = intlist__new(NULL); |
1181 | if (!lr->line_list) | |
1182 | return -ENOMEM; | |
1183 | else | |
1184 | return 0; | |
e53b00d3 MH |
1185 | } |
1186 | ||
21dd9ae5 FBH |
1187 | static int parse_line_num(char **ptr, int *val, const char *what) |
1188 | { | |
1189 | const char *start = *ptr; | |
1190 | ||
1191 | errno = 0; | |
1192 | *val = strtol(*ptr, ptr, 0); | |
1193 | if (errno || *ptr == start) { | |
1194 | semantic_error("'%s' is not a valid number.\n", what); | |
1195 | return -EINVAL; | |
1196 | } | |
1197 | return 0; | |
1198 | } | |
1199 | ||
573709fd MH |
1200 | /* Check the name is good for event, group or function */ |
1201 | static bool is_c_func_name(const char *name) | |
1202 | { | |
1203 | if (!isalpha(*name) && *name != '_') | |
1204 | return false; | |
1205 | while (*++name != '\0') { | |
1206 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
1207 | return false; | |
1208 | } | |
1209 | return true; | |
1210 | } | |
1211 | ||
9d95b580 FBH |
1212 | /* |
1213 | * Stuff 'lr' according to the line range described by 'arg'. | |
1214 | * The line range syntax is described by: | |
1215 | * | |
1216 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 1217 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 1218 | */ |
146a1439 | 1219 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 1220 | { |
e116dfa1 | 1221 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
1222 | int err; |
1223 | ||
1224 | if (!name) | |
1225 | return -ENOMEM; | |
1226 | ||
1227 | lr->start = 0; | |
1228 | lr->end = INT_MAX; | |
1229 | ||
1230 | range = strchr(name, ':'); | |
1231 | if (range) { | |
1232 | *range++ = '\0'; | |
1233 | ||
1234 | err = parse_line_num(&range, &lr->start, "start line"); | |
1235 | if (err) | |
1236 | goto err; | |
1237 | ||
1238 | if (*range == '+' || *range == '-') { | |
1239 | const char c = *range++; | |
1240 | ||
1241 | err = parse_line_num(&range, &lr->end, "end line"); | |
1242 | if (err) | |
1243 | goto err; | |
1244 | ||
1245 | if (c == '+') { | |
1246 | lr->end += lr->start; | |
1247 | /* | |
1248 | * Adjust the number of lines here. | |
1249 | * If the number of lines == 1, the | |
1250 | * the end of line should be equal to | |
1251 | * the start of line. | |
1252 | */ | |
1253 | lr->end--; | |
1254 | } | |
1255 | } | |
9d95b580 | 1256 | |
d3b63d7a | 1257 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
1258 | |
1259 | err = -EINVAL; | |
d3b63d7a | 1260 | if (lr->start > lr->end) { |
631c9def | 1261 | semantic_error("Start line must be smaller" |
146a1439 | 1262 | " than end line.\n"); |
21dd9ae5 | 1263 | goto err; |
146a1439 | 1264 | } |
21dd9ae5 FBH |
1265 | if (*range != '\0') { |
1266 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
1267 | goto err; | |
146a1439 | 1268 | } |
d3b63d7a | 1269 | } |
02b95dad | 1270 | |
e116dfa1 MH |
1271 | file = strchr(name, '@'); |
1272 | if (file) { | |
1273 | *file = '\0'; | |
1274 | lr->file = strdup(++file); | |
1275 | if (lr->file == NULL) { | |
1276 | err = -ENOMEM; | |
1277 | goto err; | |
1278 | } | |
1279 | lr->function = name; | |
573709fd | 1280 | } else if (strchr(name, '/') || strchr(name, '.')) |
21dd9ae5 | 1281 | lr->file = name; |
573709fd | 1282 | else if (is_c_func_name(name))/* We reuse it for checking funcname */ |
21dd9ae5 | 1283 | lr->function = name; |
573709fd MH |
1284 | else { /* Invalid name */ |
1285 | semantic_error("'%s' is not a valid function name.\n", name); | |
1286 | err = -EINVAL; | |
1287 | goto err; | |
1288 | } | |
146a1439 MH |
1289 | |
1290 | return 0; | |
21dd9ae5 FBH |
1291 | err: |
1292 | free(name); | |
1293 | return err; | |
631c9def MH |
1294 | } |
1295 | ||
36a009fe MH |
1296 | static int parse_perf_probe_event_name(char **arg, struct perf_probe_event *pev) |
1297 | { | |
1298 | char *ptr; | |
1299 | ||
1300 | ptr = strchr(*arg, ':'); | |
1301 | if (ptr) { | |
1302 | *ptr = '\0'; | |
42bba263 | 1303 | if (!pev->sdt && !is_c_func_name(*arg)) |
36a009fe MH |
1304 | goto ng_name; |
1305 | pev->group = strdup(*arg); | |
1306 | if (!pev->group) | |
1307 | return -ENOMEM; | |
1308 | *arg = ptr + 1; | |
1309 | } else | |
1310 | pev->group = NULL; | |
42bba263 | 1311 | if (!pev->sdt && !is_c_func_name(*arg)) { |
36a009fe MH |
1312 | ng_name: |
1313 | semantic_error("%s is bad for event name -it must " | |
1314 | "follow C symbol-naming rule.\n", *arg); | |
1315 | return -EINVAL; | |
1316 | } | |
1317 | pev->event = strdup(*arg); | |
1318 | if (pev->event == NULL) | |
1319 | return -ENOMEM; | |
1320 | ||
1321 | return 0; | |
1322 | } | |
1323 | ||
50656eec | 1324 | /* Parse probepoint definition. */ |
146a1439 | 1325 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 1326 | { |
4235b045 | 1327 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
1328 | char *ptr, *tmp; |
1329 | char c, nc = 0; | |
3099c026 | 1330 | bool file_spec = false; |
36a009fe MH |
1331 | int ret; |
1332 | ||
50656eec MH |
1333 | /* |
1334 | * <Syntax> | |
8d993d96 MH |
1335 | * perf probe [GRP:][EVENT=]SRC[:LN|;PTN] |
1336 | * perf probe [GRP:][EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
36a009fe | 1337 | * perf probe %[GRP:]SDT_EVENT |
50656eec | 1338 | */ |
e59d29e8 WN |
1339 | if (!arg) |
1340 | return -EINVAL; | |
50656eec | 1341 | |
7e9fca51 MH |
1342 | /* |
1343 | * If the probe point starts with '%', | |
1344 | * or starts with "sdt_" and has a ':' but no '=', | |
1345 | * then it should be a SDT/cached probe point. | |
1346 | */ | |
1347 | if (arg[0] == '%' || | |
1348 | (!strncmp(arg, "sdt_", 4) && | |
1349 | !!strchr(arg, ':') && !strchr(arg, '='))) { | |
36a009fe | 1350 | pev->sdt = true; |
7e9fca51 MH |
1351 | if (arg[0] == '%') |
1352 | arg++; | |
36a009fe MH |
1353 | } |
1354 | ||
2a9c8c36 | 1355 | ptr = strpbrk(arg, ";=@+%"); |
36a009fe | 1356 | if (pev->sdt) { |
8d993d96 | 1357 | if (ptr) { |
a598180a MH |
1358 | if (*ptr != '@') { |
1359 | semantic_error("%s must be an SDT name.\n", | |
1360 | arg); | |
1361 | return -EINVAL; | |
1362 | } | |
1363 | /* This must be a target file name or build id */ | |
1364 | tmp = build_id_cache__complement(ptr + 1); | |
1365 | if (tmp) { | |
1366 | pev->target = build_id_cache__origname(tmp); | |
1367 | free(tmp); | |
1368 | } else | |
1369 | pev->target = strdup(ptr + 1); | |
1370 | if (!pev->target) | |
1371 | return -ENOMEM; | |
1372 | *ptr = '\0'; | |
146a1439 | 1373 | } |
36a009fe MH |
1374 | ret = parse_perf_probe_event_name(&arg, pev); |
1375 | if (ret == 0) { | |
1376 | if (asprintf(&pev->point.function, "%%%s", pev->event) < 0) | |
1377 | ret = -errno; | |
1378 | } | |
1379 | return ret; | |
1380 | } | |
1381 | ||
1382 | if (ptr && *ptr == '=') { /* Event name */ | |
1383 | *ptr = '\0'; | |
1384 | tmp = ptr + 1; | |
1385 | ret = parse_perf_probe_event_name(&arg, pev); | |
1386 | if (ret < 0) | |
1387 | return ret; | |
1388 | ||
af663d75 MH |
1389 | arg = tmp; |
1390 | } | |
1391 | ||
3099c026 NR |
1392 | /* |
1393 | * Check arg is function or file name and copy it. | |
1394 | * | |
1395 | * We consider arg to be a file spec if and only if it satisfies | |
1396 | * all of the below criteria:: | |
1397 | * - it does not include any of "+@%", | |
1398 | * - it includes one of ":;", and | |
1399 | * - it has a period '.' in the name. | |
1400 | * | |
1401 | * Otherwise, we consider arg to be a function specification. | |
1402 | */ | |
1403 | if (!strpbrk(arg, "+@%") && (ptr = strpbrk(arg, ";:")) != NULL) { | |
1404 | /* This is a file spec if it includes a '.' before ; or : */ | |
1405 | if (memchr(arg, '.', ptr - arg)) | |
1406 | file_spec = true; | |
1407 | } | |
1408 | ||
2a9c8c36 | 1409 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
1410 | if (ptr) { |
1411 | nc = *ptr; | |
1412 | *ptr++ = '\0'; | |
1413 | } | |
1414 | ||
6c6e024f WN |
1415 | if (arg[0] == '\0') |
1416 | tmp = NULL; | |
1417 | else { | |
1418 | tmp = strdup(arg); | |
1419 | if (tmp == NULL) | |
1420 | return -ENOMEM; | |
1421 | } | |
02b95dad | 1422 | |
3099c026 | 1423 | if (file_spec) |
02b95dad | 1424 | pp->file = tmp; |
da15bd9d | 1425 | else { |
02b95dad | 1426 | pp->function = tmp; |
50656eec | 1427 | |
da15bd9d WN |
1428 | /* |
1429 | * Keep pp->function even if this is absolute address, | |
1430 | * so it can mark whether abs_address is valid. | |
1431 | * Which make 'perf probe lib.bin 0x0' possible. | |
1432 | * | |
1433 | * Note that checking length of tmp is not needed | |
1434 | * because when we access tmp[1] we know tmp[0] is '0', | |
1435 | * so tmp[1] should always valid (but could be '\0'). | |
1436 | */ | |
1437 | if (tmp && !strncmp(tmp, "0x", 2)) { | |
1438 | pp->abs_address = strtoul(pp->function, &tmp, 0); | |
1439 | if (*tmp != '\0') { | |
1440 | semantic_error("Invalid absolute address.\n"); | |
1441 | return -EINVAL; | |
1442 | } | |
1443 | } | |
1444 | } | |
1445 | ||
50656eec MH |
1446 | /* Parse other options */ |
1447 | while (ptr) { | |
1448 | arg = ptr; | |
1449 | c = nc; | |
2a9c8c36 | 1450 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
1451 | pp->lazy_line = strdup(arg); |
1452 | if (pp->lazy_line == NULL) | |
1453 | return -ENOMEM; | |
2a9c8c36 MH |
1454 | break; |
1455 | } | |
1456 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
1457 | if (ptr) { |
1458 | nc = *ptr; | |
1459 | *ptr++ = '\0'; | |
1460 | } | |
1461 | switch (c) { | |
1462 | case ':': /* Line number */ | |
1463 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 1464 | if (*tmp != '\0') { |
2a9c8c36 | 1465 | semantic_error("There is non-digit char" |
146a1439 MH |
1466 | " in line number.\n"); |
1467 | return -EINVAL; | |
1468 | } | |
50656eec MH |
1469 | break; |
1470 | case '+': /* Byte offset from a symbol */ | |
1471 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 1472 | if (*tmp != '\0') { |
2a9c8c36 | 1473 | semantic_error("There is non-digit character" |
146a1439 MH |
1474 | " in offset.\n"); |
1475 | return -EINVAL; | |
1476 | } | |
50656eec MH |
1477 | break; |
1478 | case '@': /* File name */ | |
146a1439 MH |
1479 | if (pp->file) { |
1480 | semantic_error("SRC@SRC is not allowed.\n"); | |
1481 | return -EINVAL; | |
1482 | } | |
02b95dad MH |
1483 | pp->file = strdup(arg); |
1484 | if (pp->file == NULL) | |
1485 | return -ENOMEM; | |
50656eec MH |
1486 | break; |
1487 | case '%': /* Probe places */ | |
1488 | if (strcmp(arg, "return") == 0) { | |
1489 | pp->retprobe = 1; | |
146a1439 MH |
1490 | } else { /* Others not supported yet */ |
1491 | semantic_error("%%%s is not supported.\n", arg); | |
1492 | return -ENOTSUP; | |
1493 | } | |
50656eec | 1494 | break; |
146a1439 MH |
1495 | default: /* Buggy case */ |
1496 | pr_err("This program has a bug at %s:%d.\n", | |
1497 | __FILE__, __LINE__); | |
1498 | return -ENOTSUP; | |
50656eec MH |
1499 | break; |
1500 | } | |
1501 | } | |
1502 | ||
1503 | /* Exclusion check */ | |
146a1439 | 1504 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
1505 | semantic_error("Lazy pattern can't be used with" |
1506 | " line number.\n"); | |
146a1439 MH |
1507 | return -EINVAL; |
1508 | } | |
2a9c8c36 | 1509 | |
146a1439 | 1510 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 1511 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
1512 | return -EINVAL; |
1513 | } | |
2a9c8c36 | 1514 | |
146a1439 | 1515 | if (pp->line && pp->offset) { |
0e43e5d2 | 1516 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
1517 | return -EINVAL; |
1518 | } | |
50656eec | 1519 | |
146a1439 | 1520 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 1521 | semantic_error("File always requires line number or " |
0e43e5d2 | 1522 | "lazy pattern.\n"); |
146a1439 MH |
1523 | return -EINVAL; |
1524 | } | |
50656eec | 1525 | |
146a1439 | 1526 | if (pp->offset && !pp->function) { |
0e43e5d2 | 1527 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
1528 | return -EINVAL; |
1529 | } | |
50656eec | 1530 | |
146a1439 | 1531 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 1532 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
1533 | return -EINVAL; |
1534 | } | |
50656eec | 1535 | |
146a1439 | 1536 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 1537 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 1538 | "return probe.\n"); |
146a1439 MH |
1539 | return -EINVAL; |
1540 | } | |
50656eec | 1541 | |
4235b045 | 1542 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
1543 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
1544 | pp->lazy_line); | |
146a1439 | 1545 | return 0; |
50656eec MH |
1546 | } |
1547 | ||
7df2f329 | 1548 | /* Parse perf-probe event argument */ |
146a1439 | 1549 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 1550 | { |
b2a3c12b | 1551 | char *tmp, *goodname; |
7df2f329 MH |
1552 | struct perf_probe_arg_field **fieldp; |
1553 | ||
1554 | pr_debug("parsing arg: %s into ", str); | |
1555 | ||
48481938 MH |
1556 | tmp = strchr(str, '='); |
1557 | if (tmp) { | |
02b95dad MH |
1558 | arg->name = strndup(str, tmp - str); |
1559 | if (arg->name == NULL) | |
1560 | return -ENOMEM; | |
11a1ca35 | 1561 | pr_debug("name:%s ", arg->name); |
48481938 MH |
1562 | str = tmp + 1; |
1563 | } | |
1564 | ||
11a1ca35 MH |
1565 | tmp = strchr(str, ':'); |
1566 | if (tmp) { /* Type setting */ | |
1567 | *tmp = '\0'; | |
02b95dad MH |
1568 | arg->type = strdup(tmp + 1); |
1569 | if (arg->type == NULL) | |
1570 | return -ENOMEM; | |
11a1ca35 MH |
1571 | pr_debug("type:%s ", arg->type); |
1572 | } | |
1573 | ||
b2a3c12b | 1574 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
1575 | if (!is_c_varname(str) || !tmp) { |
1576 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
1577 | arg->var = strdup(str); |
1578 | if (arg->var == NULL) | |
1579 | return -ENOMEM; | |
48481938 | 1580 | pr_debug("%s\n", arg->var); |
146a1439 | 1581 | return 0; |
7df2f329 MH |
1582 | } |
1583 | ||
b2a3c12b | 1584 | /* Structure fields or array element */ |
02b95dad MH |
1585 | arg->var = strndup(str, tmp - str); |
1586 | if (arg->var == NULL) | |
1587 | return -ENOMEM; | |
b2a3c12b | 1588 | goodname = arg->var; |
48481938 | 1589 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
1590 | fieldp = &arg->field; |
1591 | ||
1592 | do { | |
e334016f MH |
1593 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
1594 | if (*fieldp == NULL) | |
1595 | return -ENOMEM; | |
b2a3c12b MH |
1596 | if (*tmp == '[') { /* Array */ |
1597 | str = tmp; | |
1598 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 1599 | (*fieldp)->ref = true; |
b2a3c12b MH |
1600 | if (*tmp != ']' || tmp == str + 1) { |
1601 | semantic_error("Array index must be a" | |
1602 | " number.\n"); | |
1603 | return -EINVAL; | |
1604 | } | |
1605 | tmp++; | |
1606 | if (*tmp == '\0') | |
1607 | tmp = NULL; | |
1608 | } else { /* Structure */ | |
1609 | if (*tmp == '.') { | |
1610 | str = tmp + 1; | |
1611 | (*fieldp)->ref = false; | |
1612 | } else if (tmp[1] == '>') { | |
1613 | str = tmp + 2; | |
1614 | (*fieldp)->ref = true; | |
1615 | } else { | |
1616 | semantic_error("Argument parse error: %s\n", | |
1617 | str); | |
1618 | return -EINVAL; | |
1619 | } | |
1620 | tmp = strpbrk(str, "-.["); | |
146a1439 | 1621 | } |
7df2f329 | 1622 | if (tmp) { |
02b95dad MH |
1623 | (*fieldp)->name = strndup(str, tmp - str); |
1624 | if ((*fieldp)->name == NULL) | |
1625 | return -ENOMEM; | |
b2a3c12b MH |
1626 | if (*str != '[') |
1627 | goodname = (*fieldp)->name; | |
7df2f329 MH |
1628 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
1629 | fieldp = &(*fieldp)->next; | |
1630 | } | |
1631 | } while (tmp); | |
02b95dad MH |
1632 | (*fieldp)->name = strdup(str); |
1633 | if ((*fieldp)->name == NULL) | |
1634 | return -ENOMEM; | |
b2a3c12b MH |
1635 | if (*str != '[') |
1636 | goodname = (*fieldp)->name; | |
7df2f329 | 1637 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 1638 | |
b2a3c12b | 1639 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 1640 | if (!arg->name) { |
b2a3c12b | 1641 | arg->name = strdup(goodname); |
02b95dad MH |
1642 | if (arg->name == NULL) |
1643 | return -ENOMEM; | |
1644 | } | |
146a1439 | 1645 | return 0; |
7df2f329 MH |
1646 | } |
1647 | ||
4235b045 | 1648 | /* Parse perf-probe event command */ |
146a1439 | 1649 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1650 | { |
e1c01d61 | 1651 | char **argv; |
146a1439 | 1652 | int argc, i, ret = 0; |
fac13fd5 | 1653 | |
4235b045 | 1654 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1655 | if (!argv) { |
1656 | pr_debug("Failed to split arguments.\n"); | |
1657 | return -ENOMEM; | |
1658 | } | |
1659 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1660 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1661 | ret = -ERANGE; | |
1662 | goto out; | |
1663 | } | |
50656eec | 1664 | /* Parse probe point */ |
146a1439 MH |
1665 | ret = parse_perf_probe_point(argv[0], pev); |
1666 | if (ret < 0) | |
1667 | goto out; | |
50656eec | 1668 | |
e1c01d61 | 1669 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1670 | pev->nargs = argc - 1; |
e334016f MH |
1671 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1672 | if (pev->args == NULL) { | |
1673 | ret = -ENOMEM; | |
1674 | goto out; | |
1675 | } | |
146a1439 MH |
1676 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1677 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1678 | if (ret >= 0 && | |
1679 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1680 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1681 | " kretprobe.\n"); |
1682 | ret = -EINVAL; | |
1683 | } | |
e1c01d61 | 1684 | } |
146a1439 | 1685 | out: |
e1c01d61 | 1686 | argv_free(argv); |
146a1439 MH |
1687 | |
1688 | return ret; | |
50656eec MH |
1689 | } |
1690 | ||
b3f33f93 RB |
1691 | /* Returns true if *any* ARG is either C variable, $params or $vars. */ |
1692 | bool perf_probe_with_var(struct perf_probe_event *pev) | |
1693 | { | |
1694 | int i = 0; | |
1695 | ||
1696 | for (i = 0; i < pev->nargs; i++) | |
1697 | if (is_c_varname(pev->args[i].var) || | |
1698 | !strcmp(pev->args[i].var, PROBE_ARG_PARAMS) || | |
1699 | !strcmp(pev->args[i].var, PROBE_ARG_VARS)) | |
1700 | return true; | |
1701 | return false; | |
1702 | } | |
1703 | ||
4235b045 MH |
1704 | /* Return true if this perf_probe_event requires debuginfo */ |
1705 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1706 | { | |
4235b045 MH |
1707 | if (pev->point.file || pev->point.line || pev->point.lazy_line) |
1708 | return true; | |
1709 | ||
b3f33f93 RB |
1710 | if (perf_probe_with_var(pev)) |
1711 | return true; | |
4235b045 MH |
1712 | |
1713 | return false; | |
1714 | } | |
1715 | ||
0e60836b | 1716 | /* Parse probe_events event into struct probe_point */ |
92f6c72e | 1717 | int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev) |
4de189fe | 1718 | { |
0e60836b | 1719 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1720 | char pr; |
1721 | char *p; | |
bcbd0040 | 1722 | char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str; |
4de189fe MH |
1723 | int ret, i, argc; |
1724 | char **argv; | |
1725 | ||
0e60836b | 1726 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1727 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1728 | if (!argv) { |
1729 | pr_debug("Failed to split arguments.\n"); | |
1730 | return -ENOMEM; | |
1731 | } | |
1732 | if (argc < 2) { | |
1733 | semantic_error("Too few probe arguments.\n"); | |
1734 | ret = -ERANGE; | |
1735 | goto out; | |
1736 | } | |
4de189fe MH |
1737 | |
1738 | /* Scan event and group name. */ | |
bcbd0040 IT |
1739 | argv0_str = strdup(argv[0]); |
1740 | if (argv0_str == NULL) { | |
1741 | ret = -ENOMEM; | |
1742 | goto out; | |
1743 | } | |
1744 | fmt1_str = strtok_r(argv0_str, ":", &fmt); | |
1745 | fmt2_str = strtok_r(NULL, "/", &fmt); | |
1746 | fmt3_str = strtok_r(NULL, " \t", &fmt); | |
1747 | if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL | |
1748 | || fmt3_str == NULL) { | |
146a1439 MH |
1749 | semantic_error("Failed to parse event name: %s\n", argv[0]); |
1750 | ret = -EINVAL; | |
1751 | goto out; | |
1752 | } | |
bcbd0040 IT |
1753 | pr = fmt1_str[0]; |
1754 | tev->group = strdup(fmt2_str); | |
1755 | tev->event = strdup(fmt3_str); | |
1756 | if (tev->group == NULL || tev->event == NULL) { | |
1757 | ret = -ENOMEM; | |
1758 | goto out; | |
1759 | } | |
4235b045 | 1760 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1761 | |
4235b045 | 1762 | tp->retprobe = (pr == 'r'); |
4de189fe | 1763 | |
190b57fc MH |
1764 | /* Scan module name(if there), function name and offset */ |
1765 | p = strchr(argv[1], ':'); | |
1766 | if (p) { | |
1767 | tp->module = strndup(argv[1], p - argv[1]); | |
844faa4b MH |
1768 | if (!tp->module) { |
1769 | ret = -ENOMEM; | |
1770 | goto out; | |
1771 | } | |
42bba263 | 1772 | tev->uprobes = (tp->module[0] == '/'); |
190b57fc MH |
1773 | p++; |
1774 | } else | |
1775 | p = argv[1]; | |
bcbd0040 | 1776 | fmt1_str = strtok_r(p, "+", &fmt); |
be07afe9 WN |
1777 | /* only the address started with 0x */ |
1778 | if (fmt1_str[0] == '0') { | |
1779 | /* | |
1780 | * Fix a special case: | |
1781 | * if address == 0, kernel reports something like: | |
1782 | * p:probe_libc/abs_0 /lib/libc-2.18.so:0x (null) arg1=%ax | |
1783 | * Newer kernel may fix that, but we want to | |
1784 | * support old kernel also. | |
1785 | */ | |
1786 | if (strcmp(fmt1_str, "0x") == 0) { | |
1787 | if (!argv[2] || strcmp(argv[2], "(null)")) { | |
1788 | ret = -EINVAL; | |
1789 | goto out; | |
1790 | } | |
1791 | tp->address = 0; | |
1792 | ||
1793 | free(argv[2]); | |
1794 | for (i = 2; argv[i + 1] != NULL; i++) | |
1795 | argv[i] = argv[i + 1]; | |
1796 | ||
1797 | argv[i] = NULL; | |
1798 | argc -= 1; | |
1799 | } else | |
1800 | tp->address = strtoul(fmt1_str, NULL, 0); | |
1801 | } else { | |
5a6f6314 MH |
1802 | /* Only the symbol-based probe has offset */ |
1803 | tp->symbol = strdup(fmt1_str); | |
1804 | if (tp->symbol == NULL) { | |
1805 | ret = -ENOMEM; | |
1806 | goto out; | |
1807 | } | |
1808 | fmt2_str = strtok_r(NULL, "", &fmt); | |
1809 | if (fmt2_str == NULL) | |
1810 | tp->offset = 0; | |
1811 | else | |
1812 | tp->offset = strtoul(fmt2_str, NULL, 10); | |
bcbd0040 | 1813 | } |
4de189fe | 1814 | |
4235b045 | 1815 | tev->nargs = argc - 2; |
0e60836b | 1816 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1817 | if (tev->args == NULL) { |
1818 | ret = -ENOMEM; | |
1819 | goto out; | |
1820 | } | |
4235b045 | 1821 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1822 | p = strchr(argv[i + 2], '='); |
1823 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1824 | *p++ = '\0'; |
1825 | else | |
1826 | p = argv[i + 2]; | |
02b95dad | 1827 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1828 | /* TODO: parse regs and offset */ |
02b95dad MH |
1829 | tev->args[i].value = strdup(p); |
1830 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1831 | ret = -ENOMEM; | |
1832 | goto out; | |
1833 | } | |
4de189fe | 1834 | } |
146a1439 MH |
1835 | ret = 0; |
1836 | out: | |
bcbd0040 | 1837 | free(argv0_str); |
4de189fe | 1838 | argv_free(argv); |
146a1439 | 1839 | return ret; |
4de189fe MH |
1840 | } |
1841 | ||
7df2f329 | 1842 | /* Compose only probe arg */ |
909b0360 | 1843 | char *synthesize_perf_probe_arg(struct perf_probe_arg *pa) |
7df2f329 MH |
1844 | { |
1845 | struct perf_probe_arg_field *field = pa->field; | |
909b0360 | 1846 | struct strbuf buf; |
bf4d5f25 MH |
1847 | char *ret = NULL; |
1848 | int err; | |
1849 | ||
1850 | if (strbuf_init(&buf, 64) < 0) | |
1851 | return NULL; | |
7df2f329 | 1852 | |
48481938 | 1853 | if (pa->name && pa->var) |
bf4d5f25 | 1854 | err = strbuf_addf(&buf, "%s=%s", pa->name, pa->var); |
48481938 | 1855 | else |
bf4d5f25 MH |
1856 | err = strbuf_addstr(&buf, pa->name ?: pa->var); |
1857 | if (err) | |
1858 | goto out; | |
7df2f329 MH |
1859 | |
1860 | while (field) { | |
b2a3c12b | 1861 | if (field->name[0] == '[') |
bf4d5f25 | 1862 | err = strbuf_addstr(&buf, field->name); |
b2a3c12b | 1863 | else |
bf4d5f25 MH |
1864 | err = strbuf_addf(&buf, "%s%s", field->ref ? "->" : ".", |
1865 | field->name); | |
7df2f329 | 1866 | field = field->next; |
bf4d5f25 MH |
1867 | if (err) |
1868 | goto out; | |
7df2f329 | 1869 | } |
11a1ca35 | 1870 | |
909b0360 | 1871 | if (pa->type) |
bf4d5f25 MH |
1872 | if (strbuf_addf(&buf, ":%s", pa->type) < 0) |
1873 | goto out; | |
909b0360 MH |
1874 | |
1875 | ret = strbuf_detach(&buf, NULL); | |
bf4d5f25 MH |
1876 | out: |
1877 | strbuf_release(&buf); | |
146a1439 | 1878 | return ret; |
7df2f329 MH |
1879 | } |
1880 | ||
4235b045 | 1881 | /* Compose only probe point (not argument) */ |
c4ff4920 | 1882 | char *synthesize_perf_probe_point(struct perf_probe_point *pp) |
4de189fe | 1883 | { |
909b0360 | 1884 | struct strbuf buf; |
bf4d5f25 MH |
1885 | char *tmp, *ret = NULL; |
1886 | int len, err = 0; | |
1887 | ||
1888 | if (strbuf_init(&buf, 64) < 0) | |
1889 | return NULL; | |
909b0360 | 1890 | |
909b0360 | 1891 | if (pp->function) { |
bf4d5f25 MH |
1892 | if (strbuf_addstr(&buf, pp->function) < 0) |
1893 | goto out; | |
909b0360 | 1894 | if (pp->offset) |
bf4d5f25 | 1895 | err = strbuf_addf(&buf, "+%lu", pp->offset); |
909b0360 | 1896 | else if (pp->line) |
bf4d5f25 | 1897 | err = strbuf_addf(&buf, ":%d", pp->line); |
909b0360 | 1898 | else if (pp->retprobe) |
bf4d5f25 MH |
1899 | err = strbuf_addstr(&buf, "%return"); |
1900 | if (err) | |
1901 | goto out; | |
fb1587d8 MH |
1902 | } |
1903 | if (pp->file) { | |
32ae2ade FBH |
1904 | tmp = pp->file; |
1905 | len = strlen(tmp); | |
1906 | if (len > 30) { | |
1907 | tmp = strchr(pp->file + len - 30, '/'); | |
1908 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1909 | } | |
bf4d5f25 MH |
1910 | err = strbuf_addf(&buf, "@%s", tmp); |
1911 | if (!err && !pp->function && pp->line) | |
1912 | err = strbuf_addf(&buf, ":%d", pp->line); | |
4de189fe | 1913 | } |
bf4d5f25 MH |
1914 | if (!err) |
1915 | ret = strbuf_detach(&buf, NULL); | |
1916 | out: | |
1917 | strbuf_release(&buf); | |
1918 | return ret; | |
7ef17aaf MH |
1919 | } |
1920 | ||
4235b045 | 1921 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) |
7ef17aaf | 1922 | { |
c4ff4920 MH |
1923 | struct strbuf buf; |
1924 | char *tmp, *ret = NULL; | |
1925 | int i; | |
7ef17aaf | 1926 | |
c4ff4920 | 1927 | if (strbuf_init(&buf, 64)) |
4235b045 | 1928 | return NULL; |
c4ff4920 MH |
1929 | if (pev->event) |
1930 | if (strbuf_addf(&buf, "%s:%s=", pev->group ?: PERFPROBE_GROUP, | |
1931 | pev->event) < 0) | |
1932 | goto out; | |
1933 | ||
1934 | tmp = synthesize_perf_probe_point(&pev->point); | |
1935 | if (!tmp || strbuf_addstr(&buf, tmp) < 0) | |
1936 | goto out; | |
1937 | free(tmp); | |
4de189fe | 1938 | |
4235b045 | 1939 | for (i = 0; i < pev->nargs; i++) { |
c4ff4920 MH |
1940 | tmp = synthesize_perf_probe_arg(pev->args + i); |
1941 | if (!tmp || strbuf_addf(&buf, " %s", tmp) < 0) | |
1942 | goto out; | |
1943 | free(tmp); | |
4de189fe | 1944 | } |
4de189fe | 1945 | |
c4ff4920 MH |
1946 | ret = strbuf_detach(&buf, NULL); |
1947 | out: | |
1948 | strbuf_release(&buf); | |
1949 | return ret; | |
4235b045 | 1950 | } |
4235b045 | 1951 | |
0e60836b | 1952 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
909b0360 | 1953 | struct strbuf *buf, int depth) |
4235b045 | 1954 | { |
bf4d5f25 | 1955 | int err; |
4235b045 | 1956 | if (ref->next) { |
0e60836b | 1957 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
909b0360 | 1958 | depth + 1); |
4235b045 | 1959 | if (depth < 0) |
bf4d5f25 | 1960 | return depth; |
4235b045 | 1961 | } |
bf4d5f25 MH |
1962 | err = strbuf_addf(buf, "%+ld(", ref->offset); |
1963 | return (err < 0) ? err : depth; | |
4de189fe MH |
1964 | } |
1965 | ||
0e60836b | 1966 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
909b0360 | 1967 | struct strbuf *buf) |
50656eec | 1968 | { |
0e60836b | 1969 | struct probe_trace_arg_ref *ref = arg->ref; |
bf4d5f25 | 1970 | int depth = 0, err; |
4235b045 MH |
1971 | |
1972 | /* Argument name or separator */ | |
1973 | if (arg->name) | |
bf4d5f25 | 1974 | err = strbuf_addf(buf, " %s=", arg->name); |
4235b045 | 1975 | else |
bf4d5f25 MH |
1976 | err = strbuf_addch(buf, ' '); |
1977 | if (err) | |
1978 | return err; | |
4235b045 | 1979 | |
b7dcb857 MH |
1980 | /* Special case: @XXX */ |
1981 | if (arg->value[0] == '@' && arg->ref) | |
1982 | ref = ref->next; | |
1983 | ||
4235b045 | 1984 | /* Dereferencing arguments */ |
b7dcb857 | 1985 | if (ref) { |
909b0360 | 1986 | depth = __synthesize_probe_trace_arg_ref(ref, buf, 1); |
4235b045 MH |
1987 | if (depth < 0) |
1988 | return depth; | |
1989 | } | |
1990 | ||
1991 | /* Print argument value */ | |
b7dcb857 | 1992 | if (arg->value[0] == '@' && arg->ref) |
bf4d5f25 | 1993 | err = strbuf_addf(buf, "%s%+ld", arg->value, arg->ref->offset); |
b7dcb857 | 1994 | else |
bf4d5f25 | 1995 | err = strbuf_addstr(buf, arg->value); |
4235b045 MH |
1996 | |
1997 | /* Closing */ | |
bf4d5f25 MH |
1998 | while (!err && depth--) |
1999 | err = strbuf_addch(buf, ')'); | |
2000 | ||
4984912e | 2001 | /* Print argument type */ |
bf4d5f25 MH |
2002 | if (!err && arg->type) |
2003 | err = strbuf_addf(buf, ":%s", arg->type); | |
4235b045 | 2004 | |
bf4d5f25 | 2005 | return err; |
4235b045 MH |
2006 | } |
2007 | ||
0e60836b | 2008 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 2009 | { |
0e60836b | 2010 | struct probe_trace_point *tp = &tev->point; |
909b0360 MH |
2011 | struct strbuf buf; |
2012 | char *ret = NULL; | |
bf4d5f25 | 2013 | int i, err; |
eb948e50 | 2014 | |
da15bd9d WN |
2015 | /* Uprobes must have tp->module */ |
2016 | if (tev->uprobes && !tp->module) | |
909b0360 MH |
2017 | return NULL; |
2018 | ||
bf4d5f25 MH |
2019 | if (strbuf_init(&buf, 32) < 0) |
2020 | return NULL; | |
2021 | ||
2022 | if (strbuf_addf(&buf, "%c:%s/%s ", tp->retprobe ? 'r' : 'p', | |
2023 | tev->group, tev->event) < 0) | |
2024 | goto error; | |
da15bd9d WN |
2025 | /* |
2026 | * If tp->address == 0, then this point must be a | |
2027 | * absolute address uprobe. | |
2028 | * try_to_find_absolute_address() should have made | |
2029 | * tp->symbol to "0x0". | |
2030 | */ | |
2031 | if (tev->uprobes && !tp->address) { | |
2032 | if (!tp->symbol || strcmp(tp->symbol, "0x0")) | |
2033 | goto error; | |
2034 | } | |
eb948e50 MH |
2035 | |
2036 | /* Use the tp->address for uprobes */ | |
225466f1 | 2037 | if (tev->uprobes) |
bf4d5f25 | 2038 | err = strbuf_addf(&buf, "%s:0x%lx", tp->module, tp->address); |
da15bd9d WN |
2039 | else if (!strncmp(tp->symbol, "0x", 2)) |
2040 | /* Absolute address. See try_to_find_absolute_address() */ | |
bf4d5f25 MH |
2041 | err = strbuf_addf(&buf, "%s%s0x%lx", tp->module ?: "", |
2042 | tp->module ? ":" : "", tp->address); | |
225466f1 | 2043 | else |
bf4d5f25 MH |
2044 | err = strbuf_addf(&buf, "%s%s%s+%lu", tp->module ?: "", |
2045 | tp->module ? ":" : "", tp->symbol, tp->offset); | |
2046 | if (err) | |
2047 | goto error; | |
50656eec | 2048 | |
909b0360 MH |
2049 | for (i = 0; i < tev->nargs; i++) |
2050 | if (synthesize_probe_trace_arg(&tev->args[i], &buf) < 0) | |
50656eec | 2051 | goto error; |
50656eec | 2052 | |
909b0360 | 2053 | ret = strbuf_detach(&buf, NULL); |
50656eec | 2054 | error: |
909b0360 MH |
2055 | strbuf_release(&buf); |
2056 | return ret; | |
4235b045 | 2057 | } |
50656eec | 2058 | |
5a6f6314 MH |
2059 | static int find_perf_probe_point_from_map(struct probe_trace_point *tp, |
2060 | struct perf_probe_point *pp, | |
2061 | bool is_kprobe) | |
2062 | { | |
2063 | struct symbol *sym = NULL; | |
2064 | struct map *map; | |
e486367f | 2065 | u64 addr = tp->address; |
5a6f6314 MH |
2066 | int ret = -ENOENT; |
2067 | ||
2068 | if (!is_kprobe) { | |
2069 | map = dso__new_map(tp->module); | |
2070 | if (!map) | |
2071 | goto out; | |
be39db9f | 2072 | sym = map__find_symbol(map, addr); |
5a6f6314 | 2073 | } else { |
9b239a12 | 2074 | if (tp->symbol && !addr) { |
0a62f686 MH |
2075 | if (kernel_get_symbol_address_by_name(tp->symbol, |
2076 | &addr, true, false) < 0) | |
9b239a12 MH |
2077 | goto out; |
2078 | } | |
5a6f6314 MH |
2079 | if (addr) { |
2080 | addr += tp->offset; | |
2081 | sym = __find_kernel_function(addr, &map); | |
2082 | } | |
2083 | } | |
98d3b258 | 2084 | |
5a6f6314 MH |
2085 | if (!sym) |
2086 | goto out; | |
2087 | ||
2088 | pp->retprobe = tp->retprobe; | |
2089 | pp->offset = addr - map->unmap_ip(map, sym->start); | |
2090 | pp->function = strdup(sym->name); | |
2091 | ret = pp->function ? 0 : -ENOMEM; | |
2092 | ||
2093 | out: | |
2094 | if (map && !is_kprobe) { | |
84c2cafa | 2095 | map__put(map); |
5a6f6314 MH |
2096 | } |
2097 | ||
2098 | return ret; | |
2099 | } | |
2100 | ||
2101 | static int convert_to_perf_probe_point(struct probe_trace_point *tp, | |
da15bd9d WN |
2102 | struct perf_probe_point *pp, |
2103 | bool is_kprobe) | |
5a6f6314 MH |
2104 | { |
2105 | char buf[128]; | |
2106 | int ret; | |
2107 | ||
2108 | ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe); | |
2109 | if (!ret) | |
2110 | return 0; | |
2111 | ret = find_perf_probe_point_from_map(tp, pp, is_kprobe); | |
2112 | if (!ret) | |
2113 | return 0; | |
2114 | ||
2115 | pr_debug("Failed to find probe point from both of dwarf and map.\n"); | |
2116 | ||
2117 | if (tp->symbol) { | |
2118 | pp->function = strdup(tp->symbol); | |
2119 | pp->offset = tp->offset; | |
614e2fdb | 2120 | } else { |
5a6f6314 MH |
2121 | ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address); |
2122 | if (ret < 0) | |
2123 | return ret; | |
2124 | pp->function = strdup(buf); | |
2125 | pp->offset = 0; | |
2126 | } | |
2127 | if (pp->function == NULL) | |
2128 | return -ENOMEM; | |
2129 | ||
2130 | pp->retprobe = tp->retprobe; | |
2131 | ||
2132 | return 0; | |
2133 | } | |
2134 | ||
0e60836b | 2135 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
225466f1 | 2136 | struct perf_probe_event *pev, bool is_kprobe) |
4235b045 | 2137 | { |
909b0360 | 2138 | struct strbuf buf = STRBUF_INIT; |
146a1439 | 2139 | int i, ret; |
4235b045 | 2140 | |
4b4da7f7 | 2141 | /* Convert event/group name */ |
02b95dad MH |
2142 | pev->event = strdup(tev->event); |
2143 | pev->group = strdup(tev->group); | |
2144 | if (pev->event == NULL || pev->group == NULL) | |
2145 | return -ENOMEM; | |
fb1587d8 | 2146 | |
4b4da7f7 | 2147 | /* Convert trace_point to probe_point */ |
5a6f6314 | 2148 | ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe); |
146a1439 MH |
2149 | if (ret < 0) |
2150 | return ret; | |
4b4da7f7 | 2151 | |
4235b045 MH |
2152 | /* Convert trace_arg to probe_arg */ |
2153 | pev->nargs = tev->nargs; | |
e334016f MH |
2154 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
2155 | if (pev->args == NULL) | |
2156 | return -ENOMEM; | |
02b95dad | 2157 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 2158 | if (tev->args[i].name) |
02b95dad | 2159 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 2160 | else { |
bf4d5f25 MH |
2161 | if ((ret = strbuf_init(&buf, 32)) < 0) |
2162 | goto error; | |
909b0360 MH |
2163 | ret = synthesize_probe_trace_arg(&tev->args[i], &buf); |
2164 | pev->args[i].name = strbuf_detach(&buf, NULL); | |
4235b045 | 2165 | } |
02b95dad MH |
2166 | if (pev->args[i].name == NULL && ret >= 0) |
2167 | ret = -ENOMEM; | |
2168 | } | |
bf4d5f25 | 2169 | error: |
146a1439 MH |
2170 | if (ret < 0) |
2171 | clear_perf_probe_event(pev); | |
2172 | ||
2173 | return ret; | |
4235b045 MH |
2174 | } |
2175 | ||
2176 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
2177 | { | |
7df2f329 | 2178 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
2179 | int i; |
2180 | ||
f5385650 ACM |
2181 | free(pev->event); |
2182 | free(pev->group); | |
7afb3fab | 2183 | free(pev->target); |
9b118aca | 2184 | clear_perf_probe_point(&pev->point); |
f5385650 | 2185 | |
7df2f329 | 2186 | for (i = 0; i < pev->nargs; i++) { |
f5385650 ACM |
2187 | free(pev->args[i].name); |
2188 | free(pev->args[i].var); | |
2189 | free(pev->args[i].type); | |
7df2f329 MH |
2190 | field = pev->args[i].field; |
2191 | while (field) { | |
2192 | next = field->next; | |
74cf249d | 2193 | zfree(&field->name); |
7df2f329 MH |
2194 | free(field); |
2195 | field = next; | |
2196 | } | |
2197 | } | |
f5385650 | 2198 | free(pev->args); |
4235b045 MH |
2199 | memset(pev, 0, sizeof(*pev)); |
2200 | } | |
2201 | ||
0542bb9c MH |
2202 | #define strdup_or_goto(str, label) \ |
2203 | ({ char *__p = NULL; if (str && !(__p = strdup(str))) goto label; __p; }) | |
2204 | ||
2205 | static int perf_probe_point__copy(struct perf_probe_point *dst, | |
2206 | struct perf_probe_point *src) | |
2207 | { | |
2208 | dst->file = strdup_or_goto(src->file, out_err); | |
2209 | dst->function = strdup_or_goto(src->function, out_err); | |
2210 | dst->lazy_line = strdup_or_goto(src->lazy_line, out_err); | |
2211 | dst->line = src->line; | |
2212 | dst->retprobe = src->retprobe; | |
2213 | dst->offset = src->offset; | |
2214 | return 0; | |
2215 | ||
2216 | out_err: | |
2217 | clear_perf_probe_point(dst); | |
2218 | return -ENOMEM; | |
2219 | } | |
2220 | ||
2221 | static int perf_probe_arg__copy(struct perf_probe_arg *dst, | |
2222 | struct perf_probe_arg *src) | |
2223 | { | |
2224 | struct perf_probe_arg_field *field, **ppfield; | |
2225 | ||
2226 | dst->name = strdup_or_goto(src->name, out_err); | |
2227 | dst->var = strdup_or_goto(src->var, out_err); | |
2228 | dst->type = strdup_or_goto(src->type, out_err); | |
2229 | ||
2230 | field = src->field; | |
2231 | ppfield = &(dst->field); | |
2232 | while (field) { | |
2233 | *ppfield = zalloc(sizeof(*field)); | |
2234 | if (!*ppfield) | |
2235 | goto out_err; | |
2236 | (*ppfield)->name = strdup_or_goto(field->name, out_err); | |
2237 | (*ppfield)->index = field->index; | |
2238 | (*ppfield)->ref = field->ref; | |
2239 | field = field->next; | |
2240 | ppfield = &((*ppfield)->next); | |
2241 | } | |
2242 | return 0; | |
2243 | out_err: | |
2244 | return -ENOMEM; | |
2245 | } | |
2246 | ||
2247 | int perf_probe_event__copy(struct perf_probe_event *dst, | |
2248 | struct perf_probe_event *src) | |
2249 | { | |
2250 | int i; | |
2251 | ||
2252 | dst->event = strdup_or_goto(src->event, out_err); | |
2253 | dst->group = strdup_or_goto(src->group, out_err); | |
2254 | dst->target = strdup_or_goto(src->target, out_err); | |
2255 | dst->uprobes = src->uprobes; | |
2256 | ||
2257 | if (perf_probe_point__copy(&dst->point, &src->point) < 0) | |
2258 | goto out_err; | |
2259 | ||
2260 | dst->args = zalloc(sizeof(struct perf_probe_arg) * src->nargs); | |
2261 | if (!dst->args) | |
2262 | goto out_err; | |
2263 | dst->nargs = src->nargs; | |
2264 | ||
2265 | for (i = 0; i < src->nargs; i++) | |
2266 | if (perf_probe_arg__copy(&dst->args[i], &src->args[i]) < 0) | |
2267 | goto out_err; | |
2268 | return 0; | |
2269 | ||
2270 | out_err: | |
2271 | clear_perf_probe_event(dst); | |
2272 | return -ENOMEM; | |
2273 | } | |
2274 | ||
92f6c72e | 2275 | void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 2276 | { |
0e60836b | 2277 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
2278 | int i; |
2279 | ||
f5385650 ACM |
2280 | free(tev->event); |
2281 | free(tev->group); | |
2282 | free(tev->point.symbol); | |
4c859351 | 2283 | free(tev->point.realname); |
f5385650 | 2284 | free(tev->point.module); |
4235b045 | 2285 | for (i = 0; i < tev->nargs; i++) { |
f5385650 ACM |
2286 | free(tev->args[i].name); |
2287 | free(tev->args[i].value); | |
2288 | free(tev->args[i].type); | |
4235b045 MH |
2289 | ref = tev->args[i].ref; |
2290 | while (ref) { | |
2291 | next = ref->next; | |
2292 | free(ref); | |
2293 | ref = next; | |
2294 | } | |
2295 | } | |
f5385650 | 2296 | free(tev->args); |
4235b045 | 2297 | memset(tev, 0, sizeof(*tev)); |
50656eec MH |
2298 | } |
2299 | ||
9aaf5a5f MH |
2300 | struct kprobe_blacklist_node { |
2301 | struct list_head list; | |
2302 | unsigned long start; | |
2303 | unsigned long end; | |
2304 | char *symbol; | |
2305 | }; | |
2306 | ||
2307 | static void kprobe_blacklist__delete(struct list_head *blacklist) | |
2308 | { | |
2309 | struct kprobe_blacklist_node *node; | |
2310 | ||
2311 | while (!list_empty(blacklist)) { | |
2312 | node = list_first_entry(blacklist, | |
2313 | struct kprobe_blacklist_node, list); | |
2314 | list_del(&node->list); | |
2315 | free(node->symbol); | |
2316 | free(node); | |
2317 | } | |
2318 | } | |
2319 | ||
2320 | static int kprobe_blacklist__load(struct list_head *blacklist) | |
2321 | { | |
2322 | struct kprobe_blacklist_node *node; | |
4605eab3 | 2323 | const char *__debugfs = debugfs__mountpoint(); |
9aaf5a5f MH |
2324 | char buf[PATH_MAX], *p; |
2325 | FILE *fp; | |
2326 | int ret; | |
2327 | ||
2328 | if (__debugfs == NULL) | |
2329 | return -ENOTSUP; | |
2330 | ||
2331 | ret = e_snprintf(buf, PATH_MAX, "%s/kprobes/blacklist", __debugfs); | |
2332 | if (ret < 0) | |
2333 | return ret; | |
2334 | ||
2335 | fp = fopen(buf, "r"); | |
2336 | if (!fp) | |
2337 | return -errno; | |
2338 | ||
2339 | ret = 0; | |
2340 | while (fgets(buf, PATH_MAX, fp)) { | |
2341 | node = zalloc(sizeof(*node)); | |
2342 | if (!node) { | |
2343 | ret = -ENOMEM; | |
2344 | break; | |
2345 | } | |
2346 | INIT_LIST_HEAD(&node->list); | |
2347 | list_add_tail(&node->list, blacklist); | |
2348 | if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) { | |
2349 | ret = -EINVAL; | |
2350 | break; | |
2351 | } | |
2352 | p = strchr(buf, '\t'); | |
2353 | if (p) { | |
2354 | p++; | |
2355 | if (p[strlen(p) - 1] == '\n') | |
2356 | p[strlen(p) - 1] = '\0'; | |
2357 | } else | |
2358 | p = (char *)"unknown"; | |
2359 | node->symbol = strdup(p); | |
2360 | if (!node->symbol) { | |
2361 | ret = -ENOMEM; | |
2362 | break; | |
2363 | } | |
2364 | pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n", | |
2365 | node->start, node->end, node->symbol); | |
2366 | ret++; | |
2367 | } | |
2368 | if (ret < 0) | |
2369 | kprobe_blacklist__delete(blacklist); | |
2370 | fclose(fp); | |
2371 | ||
2372 | return ret; | |
2373 | } | |
2374 | ||
2375 | static struct kprobe_blacklist_node * | |
2376 | kprobe_blacklist__find_by_address(struct list_head *blacklist, | |
2377 | unsigned long address) | |
2378 | { | |
2379 | struct kprobe_blacklist_node *node; | |
2380 | ||
2381 | list_for_each_entry(node, blacklist, list) { | |
2382 | if (node->start <= address && address <= node->end) | |
2383 | return node; | |
2384 | } | |
2385 | ||
2386 | return NULL; | |
2387 | } | |
2388 | ||
b031220d MH |
2389 | static LIST_HEAD(kprobe_blacklist); |
2390 | ||
2391 | static void kprobe_blacklist__init(void) | |
2392 | { | |
2393 | if (!list_empty(&kprobe_blacklist)) | |
2394 | return; | |
2395 | ||
2396 | if (kprobe_blacklist__load(&kprobe_blacklist) < 0) | |
2397 | pr_debug("No kprobe blacklist support, ignored\n"); | |
2398 | } | |
2399 | ||
2400 | static void kprobe_blacklist__release(void) | |
2401 | { | |
2402 | kprobe_blacklist__delete(&kprobe_blacklist); | |
2403 | } | |
2404 | ||
2405 | static bool kprobe_blacklist__listed(unsigned long address) | |
2406 | { | |
2407 | return !!kprobe_blacklist__find_by_address(&kprobe_blacklist, address); | |
2408 | } | |
2409 | ||
d350bd57 MH |
2410 | static int perf_probe_event__sprintf(const char *group, const char *event, |
2411 | struct perf_probe_event *pev, | |
ba7ecb02 MH |
2412 | const char *module, |
2413 | struct strbuf *result) | |
278498d4 | 2414 | { |
bf4d5f25 | 2415 | int i, ret; |
909b0360 | 2416 | char *buf; |
278498d4 | 2417 | |
909b0360 MH |
2418 | if (asprintf(&buf, "%s:%s", group, event) < 0) |
2419 | return -errno; | |
bf4d5f25 | 2420 | ret = strbuf_addf(result, " %-20s (on ", buf); |
909b0360 | 2421 | free(buf); |
bf4d5f25 MH |
2422 | if (ret) |
2423 | return ret; | |
4235b045 | 2424 | |
909b0360 MH |
2425 | /* Synthesize only event probe point */ |
2426 | buf = synthesize_perf_probe_point(&pev->point); | |
2427 | if (!buf) | |
2428 | return -ENOMEM; | |
bf4d5f25 | 2429 | ret = strbuf_addstr(result, buf); |
909b0360 | 2430 | free(buf); |
146a1439 | 2431 | |
bf4d5f25 MH |
2432 | if (!ret && module) |
2433 | ret = strbuf_addf(result, " in %s", module); | |
278498d4 | 2434 | |
bf4d5f25 MH |
2435 | if (!ret && pev->nargs > 0) { |
2436 | ret = strbuf_add(result, " with", 5); | |
2437 | for (i = 0; !ret && i < pev->nargs; i++) { | |
909b0360 MH |
2438 | buf = synthesize_perf_probe_arg(&pev->args[i]); |
2439 | if (!buf) | |
2440 | return -ENOMEM; | |
bf4d5f25 | 2441 | ret = strbuf_addf(result, " %s", buf); |
909b0360 | 2442 | free(buf); |
7df2f329 | 2443 | } |
278498d4 | 2444 | } |
bf4d5f25 MH |
2445 | if (!ret) |
2446 | ret = strbuf_addch(result, ')'); | |
909b0360 | 2447 | |
bf4d5f25 | 2448 | return ret; |
278498d4 MH |
2449 | } |
2450 | ||
ba7ecb02 | 2451 | /* Show an event */ |
b02137cc NK |
2452 | int show_perf_probe_event(const char *group, const char *event, |
2453 | struct perf_probe_event *pev, | |
2454 | const char *module, bool use_stdout) | |
ba7ecb02 MH |
2455 | { |
2456 | struct strbuf buf = STRBUF_INIT; | |
2457 | int ret; | |
2458 | ||
d350bd57 | 2459 | ret = perf_probe_event__sprintf(group, event, pev, module, &buf); |
ba7ecb02 MH |
2460 | if (ret >= 0) { |
2461 | if (use_stdout) | |
2462 | printf("%s\n", buf.buf); | |
2463 | else | |
2464 | pr_info("%s\n", buf.buf); | |
2465 | } | |
2466 | strbuf_release(&buf); | |
2467 | ||
2468 | return ret; | |
2469 | } | |
2470 | ||
b6a89643 MH |
2471 | static bool filter_probe_trace_event(struct probe_trace_event *tev, |
2472 | struct strfilter *filter) | |
2473 | { | |
2474 | char tmp[128]; | |
2475 | ||
2476 | /* At first, check the event name itself */ | |
2477 | if (strfilter__compare(filter, tev->event)) | |
2478 | return true; | |
2479 | ||
2480 | /* Next, check the combination of name and group */ | |
2481 | if (e_snprintf(tmp, 128, "%s:%s", tev->group, tev->event) < 0) | |
2482 | return false; | |
2483 | return strfilter__compare(filter, tmp); | |
2484 | } | |
2485 | ||
2486 | static int __show_perf_probe_events(int fd, bool is_kprobe, | |
2487 | struct strfilter *filter) | |
4de189fe | 2488 | { |
225466f1 | 2489 | int ret = 0; |
0e60836b | 2490 | struct probe_trace_event tev; |
4235b045 | 2491 | struct perf_probe_event pev; |
4de189fe MH |
2492 | struct strlist *rawlist; |
2493 | struct str_node *ent; | |
2494 | ||
4235b045 MH |
2495 | memset(&tev, 0, sizeof(tev)); |
2496 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 2497 | |
92f6c72e | 2498 | rawlist = probe_file__get_rawlist(fd); |
146a1439 | 2499 | if (!rawlist) |
6eb08660 | 2500 | return -ENOMEM; |
4de189fe | 2501 | |
602a1f4d | 2502 | strlist__for_each_entry(ent, rawlist) { |
0e60836b | 2503 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 | 2504 | if (ret >= 0) { |
b6a89643 MH |
2505 | if (!filter_probe_trace_event(&tev, filter)) |
2506 | goto next; | |
225466f1 SD |
2507 | ret = convert_to_perf_probe_event(&tev, &pev, |
2508 | is_kprobe); | |
ba7ecb02 MH |
2509 | if (ret < 0) |
2510 | goto next; | |
d350bd57 MH |
2511 | ret = show_perf_probe_event(pev.group, pev.event, |
2512 | &pev, tev.point.module, | |
ba7ecb02 | 2513 | true); |
146a1439 | 2514 | } |
b6a89643 | 2515 | next: |
4235b045 | 2516 | clear_perf_probe_event(&pev); |
0e60836b | 2517 | clear_probe_trace_event(&tev); |
146a1439 MH |
2518 | if (ret < 0) |
2519 | break; | |
4de189fe | 2520 | } |
4de189fe | 2521 | strlist__delete(rawlist); |
7737af01 MH |
2522 | /* Cleanup cached debuginfo if needed */ |
2523 | debuginfo_cache__exit(); | |
146a1439 MH |
2524 | |
2525 | return ret; | |
4de189fe MH |
2526 | } |
2527 | ||
225466f1 | 2528 | /* List up current perf-probe events */ |
b6a89643 | 2529 | int show_perf_probe_events(struct strfilter *filter) |
225466f1 | 2530 | { |
5e45187c | 2531 | int kp_fd, up_fd, ret; |
225466f1 SD |
2532 | |
2533 | setup_pager(); | |
225466f1 | 2534 | |
1f3736c9 MH |
2535 | if (probe_conf.cache) |
2536 | return probe_cache__show_all_caches(filter); | |
2537 | ||
9bae1e8c | 2538 | ret = init_probe_symbol_maps(false); |
225466f1 SD |
2539 | if (ret < 0) |
2540 | return ret; | |
2541 | ||
92f6c72e MH |
2542 | ret = probe_file__open_both(&kp_fd, &up_fd, 0); |
2543 | if (ret < 0) | |
2544 | return ret; | |
225466f1 | 2545 | |
92f6c72e MH |
2546 | if (kp_fd >= 0) |
2547 | ret = __show_perf_probe_events(kp_fd, true, filter); | |
2548 | if (up_fd >= 0 && ret >= 0) | |
b6a89643 | 2549 | ret = __show_perf_probe_events(up_fd, false, filter); |
92f6c72e MH |
2550 | if (kp_fd > 0) |
2551 | close(kp_fd); | |
2552 | if (up_fd > 0) | |
5e45187c | 2553 | close(up_fd); |
9bae1e8c | 2554 | exit_probe_symbol_maps(); |
225466f1 | 2555 | |
146a1439 | 2556 | return ret; |
50656eec MH |
2557 | } |
2558 | ||
146a1439 MH |
2559 | static int get_new_event_name(char *buf, size_t len, const char *base, |
2560 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
2561 | { |
2562 | int i, ret; | |
663b1151 | 2563 | char *p, *nbase; |
17f88fcd | 2564 | |
3099c026 NR |
2565 | if (*base == '.') |
2566 | base++; | |
663b1151 MH |
2567 | nbase = strdup(base); |
2568 | if (!nbase) | |
2569 | return -ENOMEM; | |
2570 | ||
2571 | /* Cut off the dot suffixes (e.g. .const, .isra)*/ | |
2572 | p = strchr(nbase, '.'); | |
2573 | if (p && p != nbase) | |
2574 | *p = '\0'; | |
3099c026 | 2575 | |
663b1151 MH |
2576 | /* Try no suffix number */ |
2577 | ret = e_snprintf(buf, len, "%s", nbase); | |
146a1439 | 2578 | if (ret < 0) { |
5f03cba4 | 2579 | pr_debug("snprintf() failed: %d\n", ret); |
663b1151 | 2580 | goto out; |
146a1439 | 2581 | } |
17f88fcd | 2582 | if (!strlist__has_entry(namelist, buf)) |
663b1151 | 2583 | goto out; |
17f88fcd | 2584 | |
d761b08b | 2585 | if (!allow_suffix) { |
03e01f56 WN |
2586 | pr_warning("Error: event \"%s\" already exists.\n" |
2587 | " Hint: Remove existing event by 'perf probe -d'\n" | |
2588 | " or force duplicates by 'perf probe -f'\n" | |
2589 | " or set 'force=yes' in BPF source.\n", | |
2590 | buf); | |
663b1151 MH |
2591 | ret = -EEXIST; |
2592 | goto out; | |
d761b08b MH |
2593 | } |
2594 | ||
17f88fcd MH |
2595 | /* Try to add suffix */ |
2596 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
663b1151 | 2597 | ret = e_snprintf(buf, len, "%s_%d", nbase, i); |
146a1439 | 2598 | if (ret < 0) { |
5f03cba4 | 2599 | pr_debug("snprintf() failed: %d\n", ret); |
663b1151 | 2600 | goto out; |
146a1439 | 2601 | } |
b498ce1f MH |
2602 | if (!strlist__has_entry(namelist, buf)) |
2603 | break; | |
2604 | } | |
146a1439 MH |
2605 | if (i == MAX_EVENT_INDEX) { |
2606 | pr_warning("Too many events are on the same function.\n"); | |
2607 | ret = -ERANGE; | |
2608 | } | |
2609 | ||
663b1151 MH |
2610 | out: |
2611 | free(nbase); | |
146a1439 | 2612 | return ret; |
b498ce1f MH |
2613 | } |
2614 | ||
79702f61 MH |
2615 | /* Warn if the current kernel's uprobe implementation is old */ |
2616 | static void warn_uprobe_event_compat(struct probe_trace_event *tev) | |
2617 | { | |
2618 | int i; | |
2619 | char *buf = synthesize_probe_trace_command(tev); | |
2620 | ||
2621 | /* Old uprobe event doesn't support memory dereference */ | |
2622 | if (!tev->uprobes || tev->nargs == 0 || !buf) | |
2623 | goto out; | |
2624 | ||
2625 | for (i = 0; i < tev->nargs; i++) | |
2626 | if (strglobmatch(tev->args[i].value, "[$@+-]*")) { | |
2627 | pr_warning("Please upgrade your kernel to at least " | |
2628 | "3.14 to have access to feature %s\n", | |
2629 | tev->args[i].value); | |
2630 | break; | |
2631 | } | |
2632 | out: | |
2633 | free(buf); | |
2634 | } | |
2635 | ||
a3c9de62 MH |
2636 | /* Set new name from original perf_probe_event and namelist */ |
2637 | static int probe_trace_event__set_name(struct probe_trace_event *tev, | |
2638 | struct perf_probe_event *pev, | |
2639 | struct strlist *namelist, | |
2640 | bool allow_suffix) | |
2641 | { | |
2642 | const char *event, *group; | |
2643 | char buf[64]; | |
2644 | int ret; | |
2645 | ||
bc062230 | 2646 | /* If probe_event or trace_event already have the name, reuse it */ |
42bba263 | 2647 | if (pev->event && !pev->sdt) |
a3c9de62 | 2648 | event = pev->event; |
bc062230 MH |
2649 | else if (tev->event) |
2650 | event = tev->event; | |
2651 | else { | |
2652 | /* Or generate new one from probe point */ | |
da15bd9d WN |
2653 | if (pev->point.function && |
2654 | (strncmp(pev->point.function, "0x", 2) != 0) && | |
2655 | !strisglob(pev->point.function)) | |
a3c9de62 MH |
2656 | event = pev->point.function; |
2657 | else | |
2658 | event = tev->point.realname; | |
bc062230 | 2659 | } |
42bba263 | 2660 | if (pev->group && !pev->sdt) |
a3c9de62 | 2661 | group = pev->group; |
bc062230 MH |
2662 | else if (tev->group) |
2663 | group = tev->group; | |
a3c9de62 MH |
2664 | else |
2665 | group = PERFPROBE_GROUP; | |
2666 | ||
2667 | /* Get an unused new event name */ | |
2668 | ret = get_new_event_name(buf, 64, event, | |
2669 | namelist, allow_suffix); | |
2670 | if (ret < 0) | |
2671 | return ret; | |
2672 | ||
2673 | event = buf; | |
2674 | ||
2675 | tev->event = strdup(event); | |
2676 | tev->group = strdup(group); | |
2677 | if (tev->event == NULL || tev->group == NULL) | |
2678 | return -ENOMEM; | |
2679 | ||
2680 | /* Add added event name to namelist */ | |
2681 | strlist__add(namelist, event); | |
2682 | return 0; | |
2683 | } | |
2684 | ||
1de7b8bf MH |
2685 | static int __open_probe_file_and_namelist(bool uprobe, |
2686 | struct strlist **namelist) | |
50656eec | 2687 | { |
1de7b8bf | 2688 | int fd; |
50656eec | 2689 | |
1de7b8bf | 2690 | fd = probe_file__open(PF_FL_RW | (uprobe ? PF_FL_UPROBE : 0)); |
92f6c72e | 2691 | if (fd < 0) |
146a1439 | 2692 | return fd; |
5e45187c | 2693 | |
b498ce1f | 2694 | /* Get current event names */ |
1de7b8bf MH |
2695 | *namelist = probe_file__get_namelist(fd); |
2696 | if (!(*namelist)) { | |
146a1439 | 2697 | pr_debug("Failed to get current event list.\n"); |
1de7b8bf MH |
2698 | close(fd); |
2699 | return -ENOMEM; | |
146a1439 | 2700 | } |
1de7b8bf MH |
2701 | return fd; |
2702 | } | |
2703 | ||
2704 | static int __add_probe_trace_events(struct perf_probe_event *pev, | |
2705 | struct probe_trace_event *tevs, | |
2706 | int ntevs, bool allow_suffix) | |
2707 | { | |
2708 | int i, fd[2] = {-1, -1}, up, ret; | |
2709 | struct probe_trace_event *tev = NULL; | |
2710 | struct probe_cache *cache = NULL; | |
2711 | struct strlist *namelist[2] = {NULL, NULL}; | |
2712 | ||
2713 | up = pev->uprobes ? 1 : 0; | |
2714 | fd[up] = __open_probe_file_and_namelist(up, &namelist[up]); | |
2715 | if (fd[up] < 0) | |
2716 | return fd[up]; | |
4235b045 | 2717 | |
146a1439 | 2718 | ret = 0; |
02b95dad | 2719 | for (i = 0; i < ntevs; i++) { |
4235b045 | 2720 | tev = &tevs[i]; |
1de7b8bf MH |
2721 | up = tev->uprobes ? 1 : 0; |
2722 | if (fd[up] == -1) { /* Open the kprobe/uprobe_events */ | |
2723 | fd[up] = __open_probe_file_and_namelist(up, | |
2724 | &namelist[up]); | |
2725 | if (fd[up] < 0) | |
2726 | goto close_out; | |
2727 | } | |
b031220d | 2728 | /* Skip if the symbol is out of .text or blacklisted */ |
bc062230 | 2729 | if (!tev->point.symbol && !pev->uprobes) |
5a51fcd1 | 2730 | continue; |
9aaf5a5f | 2731 | |
a3c9de62 | 2732 | /* Set new name for tev (and update namelist) */ |
1de7b8bf | 2733 | ret = probe_trace_event__set_name(tev, pev, namelist[up], |
a3c9de62 | 2734 | allow_suffix); |
146a1439 MH |
2735 | if (ret < 0) |
2736 | break; | |
4235b045 | 2737 | |
1de7b8bf | 2738 | ret = probe_file__add_event(fd[up], tev); |
146a1439 MH |
2739 | if (ret < 0) |
2740 | break; | |
4235b045 | 2741 | |
4235b045 MH |
2742 | /* |
2743 | * Probes after the first probe which comes from same | |
2744 | * user input are always allowed to add suffix, because | |
2745 | * there might be several addresses corresponding to | |
2746 | * one code line. | |
2747 | */ | |
2748 | allow_suffix = true; | |
50656eec | 2749 | } |
79702f61 MH |
2750 | if (ret == -EINVAL && pev->uprobes) |
2751 | warn_uprobe_event_compat(tev); | |
2fd457a3 MH |
2752 | if (ret == 0 && probe_conf.cache) { |
2753 | cache = probe_cache__new(pev->target); | |
2754 | if (!cache || | |
2755 | probe_cache__add_entry(cache, pev, tevs, ntevs) < 0 || | |
2756 | probe_cache__commit(cache) < 0) | |
2757 | pr_warning("Failed to add event to probe cache\n"); | |
2758 | probe_cache__delete(cache); | |
2759 | } | |
146a1439 | 2760 | |
ae2cb1ac | 2761 | close_out: |
1de7b8bf MH |
2762 | for (up = 0; up < 2; up++) { |
2763 | strlist__delete(namelist[up]); | |
2764 | if (fd[up] >= 0) | |
2765 | close(fd[up]); | |
2766 | } | |
146a1439 | 2767 | return ret; |
50656eec | 2768 | } |
fa28244d | 2769 | |
6bb536cc WN |
2770 | static int find_probe_functions(struct map *map, char *name, |
2771 | struct symbol **syms) | |
eb948e50 | 2772 | { |
564c62a4 | 2773 | int found = 0; |
0a3873a8 | 2774 | struct symbol *sym; |
4c859351 | 2775 | struct rb_node *tmp; |
564c62a4 | 2776 | |
be39db9f | 2777 | if (map__load(map) < 0) |
75e4a2a6 WN |
2778 | return 0; |
2779 | ||
4c859351 | 2780 | map__for_each_symbol(map, sym, tmp) { |
6bb536cc | 2781 | if (strglobmatch(sym->name, name)) { |
4c859351 | 2782 | found++; |
6bb536cc WN |
2783 | if (syms && found < probe_conf.max_probes) |
2784 | syms[found - 1] = sym; | |
2785 | } | |
eb948e50 | 2786 | } |
564c62a4 NK |
2787 | |
2788 | return found; | |
eb948e50 MH |
2789 | } |
2790 | ||
7b6ff0bd NR |
2791 | void __weak arch__fix_tev_from_maps(struct perf_probe_event *pev __maybe_unused, |
2792 | struct probe_trace_event *tev __maybe_unused, | |
0b3c2264 NR |
2793 | struct map *map __maybe_unused, |
2794 | struct symbol *sym __maybe_unused) { } | |
7b6ff0bd | 2795 | |
eb948e50 MH |
2796 | /* |
2797 | * Find probe function addresses from map. | |
2798 | * Return an error or the number of found probe_trace_event | |
2799 | */ | |
2800 | static int find_probe_trace_events_from_map(struct perf_probe_event *pev, | |
ddb2f58f | 2801 | struct probe_trace_event **tevs) |
e0faa8d3 | 2802 | { |
eb948e50 | 2803 | struct map *map = NULL; |
eb948e50 | 2804 | struct ref_reloc_sym *reloc_sym = NULL; |
e0faa8d3 | 2805 | struct symbol *sym; |
6bb536cc | 2806 | struct symbol **syms = NULL; |
0e60836b | 2807 | struct probe_trace_event *tev; |
eb948e50 MH |
2808 | struct perf_probe_point *pp = &pev->point; |
2809 | struct probe_trace_point *tp; | |
564c62a4 | 2810 | int num_matched_functions; |
b031220d | 2811 | int ret, i, j, skipped = 0; |
c61fb959 | 2812 | char *mod_name; |
4235b045 | 2813 | |
44225521 | 2814 | map = get_target_map(pev->target, pev->uprobes); |
eb948e50 MH |
2815 | if (!map) { |
2816 | ret = -EINVAL; | |
2817 | goto out; | |
fb7345bb MH |
2818 | } |
2819 | ||
6bb536cc WN |
2820 | syms = malloc(sizeof(struct symbol *) * probe_conf.max_probes); |
2821 | if (!syms) { | |
2822 | ret = -ENOMEM; | |
2823 | goto out; | |
2824 | } | |
2825 | ||
eb948e50 MH |
2826 | /* |
2827 | * Load matched symbols: Since the different local symbols may have | |
2828 | * same name but different addresses, this lists all the symbols. | |
2829 | */ | |
6bb536cc | 2830 | num_matched_functions = find_probe_functions(map, pp->function, syms); |
564c62a4 | 2831 | if (num_matched_functions == 0) { |
eb948e50 | 2832 | pr_err("Failed to find symbol %s in %s\n", pp->function, |
44225521 | 2833 | pev->target ? : "kernel"); |
eb948e50 MH |
2834 | ret = -ENOENT; |
2835 | goto out; | |
ddb2f58f | 2836 | } else if (num_matched_functions > probe_conf.max_probes) { |
eb948e50 | 2837 | pr_err("Too many functions matched in %s\n", |
44225521 | 2838 | pev->target ? : "kernel"); |
eb948e50 MH |
2839 | ret = -E2BIG; |
2840 | goto out; | |
fb7345bb MH |
2841 | } |
2842 | ||
1a8ac29c MH |
2843 | /* Note that the symbols in the kmodule are not relocated */ |
2844 | if (!pev->uprobes && !pp->retprobe && !pev->target) { | |
0560a0c4 | 2845 | reloc_sym = kernel_get_ref_reloc_sym(); |
eb948e50 MH |
2846 | if (!reloc_sym) { |
2847 | pr_warning("Relocated base symbol is not found!\n"); | |
2848 | ret = -EINVAL; | |
2849 | goto out; | |
2850 | } | |
2851 | } | |
4235b045 | 2852 | |
eb948e50 MH |
2853 | /* Setup result trace-probe-events */ |
2854 | *tevs = zalloc(sizeof(*tev) * num_matched_functions); | |
2855 | if (!*tevs) { | |
02b95dad | 2856 | ret = -ENOMEM; |
eb948e50 | 2857 | goto out; |
02b95dad | 2858 | } |
ce27a443 | 2859 | |
eb948e50 | 2860 | ret = 0; |
564c62a4 | 2861 | |
6bb536cc WN |
2862 | for (j = 0; j < num_matched_functions; j++) { |
2863 | sym = syms[j]; | |
2864 | ||
eb948e50 MH |
2865 | tev = (*tevs) + ret; |
2866 | tp = &tev->point; | |
2867 | if (ret == num_matched_functions) { | |
2868 | pr_warning("Too many symbols are listed. Skip it.\n"); | |
2869 | break; | |
ce27a443 | 2870 | } |
eb948e50 | 2871 | ret++; |
ce27a443 | 2872 | |
eb948e50 MH |
2873 | if (pp->offset > sym->end - sym->start) { |
2874 | pr_warning("Offset %ld is bigger than the size of %s\n", | |
2875 | pp->offset, sym->name); | |
2876 | ret = -ENOENT; | |
2877 | goto err_out; | |
2878 | } | |
2879 | /* Add one probe point */ | |
2880 | tp->address = map->unmap_ip(map, sym->start) + pp->offset; | |
1a8ac29c MH |
2881 | |
2882 | /* Check the kprobe (not in module) is within .text */ | |
2883 | if (!pev->uprobes && !pev->target && | |
b031220d MH |
2884 | kprobe_warn_out_range(sym->name, tp->address)) { |
2885 | tp->symbol = NULL; /* Skip it */ | |
2886 | skipped++; | |
2887 | } else if (reloc_sym) { | |
eb948e50 MH |
2888 | tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out); |
2889 | tp->offset = tp->address - reloc_sym->addr; | |
2890 | } else { | |
2891 | tp->symbol = strdup_or_goto(sym->name, nomem_out); | |
2892 | tp->offset = pp->offset; | |
2893 | } | |
6bb536cc WN |
2894 | tp->realname = strdup_or_goto(sym->name, nomem_out); |
2895 | ||
eb948e50 | 2896 | tp->retprobe = pp->retprobe; |
c61fb959 RB |
2897 | if (pev->target) { |
2898 | if (pev->uprobes) { | |
2899 | tev->point.module = strdup_or_goto(pev->target, | |
2900 | nomem_out); | |
2901 | } else { | |
2902 | mod_name = find_module_name(pev->target); | |
2903 | tev->point.module = | |
2904 | strdup(mod_name ? mod_name : pev->target); | |
2905 | free(mod_name); | |
2906 | if (!tev->point.module) | |
2907 | goto nomem_out; | |
2908 | } | |
2909 | } | |
eb948e50 MH |
2910 | tev->uprobes = pev->uprobes; |
2911 | tev->nargs = pev->nargs; | |
2912 | if (tev->nargs) { | |
2913 | tev->args = zalloc(sizeof(struct probe_trace_arg) * | |
2914 | tev->nargs); | |
2915 | if (tev->args == NULL) | |
2916 | goto nomem_out; | |
e334016f | 2917 | } |
48481938 | 2918 | for (i = 0; i < tev->nargs; i++) { |
eb948e50 MH |
2919 | if (pev->args[i].name) |
2920 | tev->args[i].name = | |
2921 | strdup_or_goto(pev->args[i].name, | |
2922 | nomem_out); | |
2923 | ||
2924 | tev->args[i].value = strdup_or_goto(pev->args[i].var, | |
2925 | nomem_out); | |
2926 | if (pev->args[i].type) | |
2927 | tev->args[i].type = | |
2928 | strdup_or_goto(pev->args[i].type, | |
2929 | nomem_out); | |
48481938 | 2930 | } |
0b3c2264 | 2931 | arch__fix_tev_from_maps(pev, tev, map, sym); |
4235b045 | 2932 | } |
b031220d MH |
2933 | if (ret == skipped) { |
2934 | ret = -ENOENT; | |
2935 | goto err_out; | |
2936 | } | |
4235b045 | 2937 | |
eb948e50 | 2938 | out: |
eebc509b | 2939 | map__put(map); |
6bb536cc | 2940 | free(syms); |
eb948e50 | 2941 | return ret; |
225466f1 | 2942 | |
eb948e50 MH |
2943 | nomem_out: |
2944 | ret = -ENOMEM; | |
2945 | err_out: | |
2946 | clear_probe_trace_events(*tevs, num_matched_functions); | |
2947 | zfree(tevs); | |
2948 | goto out; | |
2949 | } | |
1c1bc922 | 2950 | |
da15bd9d WN |
2951 | static int try_to_find_absolute_address(struct perf_probe_event *pev, |
2952 | struct probe_trace_event **tevs) | |
2953 | { | |
2954 | struct perf_probe_point *pp = &pev->point; | |
2955 | struct probe_trace_event *tev; | |
2956 | struct probe_trace_point *tp; | |
2957 | int i, err; | |
2958 | ||
2959 | if (!(pev->point.function && !strncmp(pev->point.function, "0x", 2))) | |
2960 | return -EINVAL; | |
2961 | if (perf_probe_event_need_dwarf(pev)) | |
2962 | return -EINVAL; | |
2963 | ||
2964 | /* | |
2965 | * This is 'perf probe /lib/libc.so 0xabcd'. Try to probe at | |
2966 | * absolute address. | |
2967 | * | |
2968 | * Only one tev can be generated by this. | |
2969 | */ | |
2970 | *tevs = zalloc(sizeof(*tev)); | |
2971 | if (!*tevs) | |
2972 | return -ENOMEM; | |
2973 | ||
2974 | tev = *tevs; | |
2975 | tp = &tev->point; | |
2976 | ||
2977 | /* | |
2978 | * Don't use tp->offset, use address directly, because | |
2979 | * in synthesize_probe_trace_command() address cannot be | |
2980 | * zero. | |
2981 | */ | |
2982 | tp->address = pev->point.abs_address; | |
2983 | tp->retprobe = pp->retprobe; | |
2984 | tev->uprobes = pev->uprobes; | |
2985 | ||
2986 | err = -ENOMEM; | |
2987 | /* | |
2988 | * Give it a '0x' leading symbol name. | |
2989 | * In __add_probe_trace_events, a NULL symbol is interpreted as | |
2990 | * invalud. | |
2991 | */ | |
2992 | if (asprintf(&tp->symbol, "0x%lx", tp->address) < 0) | |
2993 | goto errout; | |
2994 | ||
2995 | /* For kprobe, check range */ | |
2996 | if ((!tev->uprobes) && | |
2997 | (kprobe_warn_out_range(tev->point.symbol, | |
2998 | tev->point.address))) { | |
2999 | err = -EACCES; | |
3000 | goto errout; | |
3001 | } | |
3002 | ||
3003 | if (asprintf(&tp->realname, "abs_%lx", tp->address) < 0) | |
3004 | goto errout; | |
3005 | ||
3006 | if (pev->target) { | |
3007 | tp->module = strdup(pev->target); | |
3008 | if (!tp->module) | |
3009 | goto errout; | |
3010 | } | |
3011 | ||
3012 | if (tev->group) { | |
3013 | tev->group = strdup(pev->group); | |
3014 | if (!tev->group) | |
3015 | goto errout; | |
3016 | } | |
3017 | ||
3018 | if (pev->event) { | |
3019 | tev->event = strdup(pev->event); | |
3020 | if (!tev->event) | |
3021 | goto errout; | |
3022 | } | |
3023 | ||
3024 | tev->nargs = pev->nargs; | |
3025 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); | |
3026 | if (!tev->args) { | |
3027 | err = -ENOMEM; | |
3028 | goto errout; | |
3029 | } | |
3030 | for (i = 0; i < tev->nargs; i++) | |
3031 | copy_to_probe_trace_arg(&tev->args[i], &pev->args[i]); | |
3032 | ||
3033 | return 1; | |
3034 | ||
3035 | errout: | |
3036 | if (*tevs) { | |
3037 | clear_probe_trace_events(*tevs, 1); | |
3038 | *tevs = NULL; | |
3039 | } | |
3040 | return err; | |
3041 | } | |
3042 | ||
42bba263 MH |
3043 | /* Concatinate two arrays */ |
3044 | static void *memcat(void *a, size_t sz_a, void *b, size_t sz_b) | |
3045 | { | |
3046 | void *ret; | |
3047 | ||
3048 | ret = malloc(sz_a + sz_b); | |
3049 | if (ret) { | |
3050 | memcpy(ret, a, sz_a); | |
3051 | memcpy(ret + sz_a, b, sz_b); | |
3052 | } | |
3053 | return ret; | |
3054 | } | |
3055 | ||
3056 | static int | |
3057 | concat_probe_trace_events(struct probe_trace_event **tevs, int *ntevs, | |
3058 | struct probe_trace_event **tevs2, int ntevs2) | |
3059 | { | |
3060 | struct probe_trace_event *new_tevs; | |
3061 | int ret = 0; | |
3062 | ||
3063 | if (ntevs == 0) { | |
3064 | *tevs = *tevs2; | |
3065 | *ntevs = ntevs2; | |
3066 | *tevs2 = NULL; | |
3067 | return 0; | |
3068 | } | |
3069 | ||
3070 | if (*ntevs + ntevs2 > probe_conf.max_probes) | |
3071 | ret = -E2BIG; | |
3072 | else { | |
3073 | /* Concatinate the array of probe_trace_event */ | |
3074 | new_tevs = memcat(*tevs, (*ntevs) * sizeof(**tevs), | |
3075 | *tevs2, ntevs2 * sizeof(**tevs2)); | |
3076 | if (!new_tevs) | |
3077 | ret = -ENOMEM; | |
3078 | else { | |
3079 | free(*tevs); | |
3080 | *tevs = new_tevs; | |
3081 | *ntevs += ntevs2; | |
3082 | } | |
3083 | } | |
3084 | if (ret < 0) | |
3085 | clear_probe_trace_events(*tevs2, ntevs2); | |
3086 | zfree(tevs2); | |
3087 | ||
3088 | return ret; | |
3089 | } | |
3090 | ||
3091 | /* | |
3092 | * Try to find probe_trace_event from given probe caches. Return the number | |
3093 | * of cached events found, if an error occurs return the error. | |
3094 | */ | |
3095 | static int find_cached_events(struct perf_probe_event *pev, | |
3096 | struct probe_trace_event **tevs, | |
3097 | const char *target) | |
3098 | { | |
3099 | struct probe_cache *cache; | |
3100 | struct probe_cache_entry *entry; | |
3101 | struct probe_trace_event *tmp_tevs = NULL; | |
3102 | int ntevs = 0; | |
3103 | int ret = 0; | |
3104 | ||
3105 | cache = probe_cache__new(target); | |
3106 | /* Return 0 ("not found") if the target has no probe cache. */ | |
3107 | if (!cache) | |
3108 | return 0; | |
3109 | ||
3110 | for_each_probe_cache_entry(entry, cache) { | |
3111 | /* Skip the cache entry which has no name */ | |
3112 | if (!entry->pev.event || !entry->pev.group) | |
3113 | continue; | |
3114 | if ((!pev->group || strglobmatch(entry->pev.group, pev->group)) && | |
3115 | strglobmatch(entry->pev.event, pev->event)) { | |
3116 | ret = probe_cache_entry__get_event(entry, &tmp_tevs); | |
3117 | if (ret > 0) | |
3118 | ret = concat_probe_trace_events(tevs, &ntevs, | |
3119 | &tmp_tevs, ret); | |
3120 | if (ret < 0) | |
3121 | break; | |
3122 | } | |
3123 | } | |
3124 | probe_cache__delete(cache); | |
3125 | if (ret < 0) { | |
3126 | clear_probe_trace_events(*tevs, ntevs); | |
3127 | zfree(tevs); | |
3128 | } else { | |
3129 | ret = ntevs; | |
3130 | if (ntevs > 0 && target && target[0] == '/') | |
3131 | pev->uprobes = true; | |
3132 | } | |
3133 | ||
3134 | return ret; | |
3135 | } | |
3136 | ||
1de7b8bf MH |
3137 | /* Try to find probe_trace_event from all probe caches */ |
3138 | static int find_cached_events_all(struct perf_probe_event *pev, | |
3139 | struct probe_trace_event **tevs) | |
3140 | { | |
3141 | struct probe_trace_event *tmp_tevs = NULL; | |
3142 | struct strlist *bidlist; | |
3143 | struct str_node *nd; | |
3144 | char *pathname; | |
3145 | int ntevs = 0; | |
3146 | int ret; | |
3147 | ||
3148 | /* Get the buildid list of all valid caches */ | |
3149 | bidlist = build_id_cache__list_all(true); | |
3150 | if (!bidlist) { | |
3151 | ret = -errno; | |
3152 | pr_debug("Failed to get buildids: %d\n", ret); | |
3153 | return ret; | |
3154 | } | |
3155 | ||
3156 | ret = 0; | |
3157 | strlist__for_each_entry(nd, bidlist) { | |
3158 | pathname = build_id_cache__origname(nd->s); | |
3159 | ret = find_cached_events(pev, &tmp_tevs, pathname); | |
3160 | /* In the case of cnt == 0, we just skip it */ | |
3161 | if (ret > 0) | |
3162 | ret = concat_probe_trace_events(tevs, &ntevs, | |
3163 | &tmp_tevs, ret); | |
3164 | free(pathname); | |
3165 | if (ret < 0) | |
3166 | break; | |
3167 | } | |
3168 | strlist__delete(bidlist); | |
3169 | ||
3170 | if (ret < 0) { | |
3171 | clear_probe_trace_events(*tevs, ntevs); | |
3172 | zfree(tevs); | |
3173 | } else | |
3174 | ret = ntevs; | |
3175 | ||
3176 | return ret; | |
3177 | } | |
3178 | ||
bc062230 MH |
3179 | static int find_probe_trace_events_from_cache(struct perf_probe_event *pev, |
3180 | struct probe_trace_event **tevs) | |
3181 | { | |
3182 | struct probe_cache *cache; | |
3183 | struct probe_cache_entry *entry; | |
3184 | struct probe_trace_event *tev; | |
3185 | struct str_node *node; | |
3186 | int ret, i; | |
3187 | ||
1de7b8bf | 3188 | if (pev->sdt) { |
42bba263 | 3189 | /* For SDT/cached events, we use special search functions */ |
1de7b8bf MH |
3190 | if (!pev->target) |
3191 | return find_cached_events_all(pev, tevs); | |
3192 | else | |
3193 | return find_cached_events(pev, tevs, pev->target); | |
3194 | } | |
bc062230 MH |
3195 | cache = probe_cache__new(pev->target); |
3196 | if (!cache) | |
3197 | return 0; | |
3198 | ||
3199 | entry = probe_cache__find(cache, pev); | |
3200 | if (!entry) { | |
36a009fe MH |
3201 | /* SDT must be in the cache */ |
3202 | ret = pev->sdt ? -ENOENT : 0; | |
bc062230 MH |
3203 | goto out; |
3204 | } | |
3205 | ||
3206 | ret = strlist__nr_entries(entry->tevlist); | |
3207 | if (ret > probe_conf.max_probes) { | |
3208 | pr_debug("Too many entries matched in the cache of %s\n", | |
3209 | pev->target ? : "kernel"); | |
3210 | ret = -E2BIG; | |
3211 | goto out; | |
3212 | } | |
3213 | ||
3214 | *tevs = zalloc(ret * sizeof(*tev)); | |
3215 | if (!*tevs) { | |
3216 | ret = -ENOMEM; | |
3217 | goto out; | |
3218 | } | |
3219 | ||
3220 | i = 0; | |
3221 | strlist__for_each_entry(node, entry->tevlist) { | |
3222 | tev = &(*tevs)[i++]; | |
3223 | ret = parse_probe_trace_command(node->s, tev); | |
3224 | if (ret < 0) | |
3225 | goto out; | |
3226 | /* Set the uprobes attribute as same as original */ | |
3227 | tev->uprobes = pev->uprobes; | |
3228 | } | |
3229 | ret = i; | |
3230 | ||
3231 | out: | |
3232 | probe_cache__delete(cache); | |
3233 | return ret; | |
3234 | } | |
3235 | ||
eb948e50 | 3236 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
ddb2f58f | 3237 | struct probe_trace_event **tevs) |
eb948e50 MH |
3238 | { |
3239 | int ret; | |
3240 | ||
36a009fe | 3241 | if (!pev->group && !pev->sdt) { |
2a12ec13 MH |
3242 | /* Set group name if not given */ |
3243 | if (!pev->uprobes) { | |
3244 | pev->group = strdup(PERFPROBE_GROUP); | |
3245 | ret = pev->group ? 0 : -ENOMEM; | |
3246 | } else | |
3247 | ret = convert_exec_to_group(pev->target, &pev->group); | |
eb948e50 MH |
3248 | if (ret != 0) { |
3249 | pr_warning("Failed to make a group name.\n"); | |
3250 | return ret; | |
3251 | } | |
02b95dad | 3252 | } |
e334016f | 3253 | |
da15bd9d WN |
3254 | ret = try_to_find_absolute_address(pev, tevs); |
3255 | if (ret > 0) | |
3256 | return ret; | |
3257 | ||
bc062230 MH |
3258 | /* At first, we need to lookup cache entry */ |
3259 | ret = find_probe_trace_events_from_cache(pev, tevs); | |
36a009fe MH |
3260 | if (ret > 0 || pev->sdt) /* SDT can be found only in the cache */ |
3261 | return ret == 0 ? -ENOENT : ret; /* Found in probe cache */ | |
bc062230 | 3262 | |
eb948e50 | 3263 | /* Convert perf_probe_event with debuginfo */ |
ddb2f58f | 3264 | ret = try_to_find_probe_trace_events(pev, tevs); |
eb948e50 MH |
3265 | if (ret != 0) |
3266 | return ret; /* Found in debuginfo or got an error */ | |
3267 | ||
ddb2f58f | 3268 | return find_probe_trace_events_from_map(pev, tevs); |
4235b045 MH |
3269 | } |
3270 | ||
12fae5ef | 3271 | int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs) |
4235b045 | 3272 | { |
844dffa5 | 3273 | int i, ret; |
4235b045 | 3274 | |
4235b045 MH |
3275 | /* Loop 1: convert all events */ |
3276 | for (i = 0; i < npevs; i++) { | |
b031220d | 3277 | /* Init kprobe blacklist if needed */ |
12fae5ef | 3278 | if (!pevs[i].uprobes) |
b031220d | 3279 | kprobe_blacklist__init(); |
4235b045 | 3280 | /* Convert with or without debuginfo */ |
12fae5ef | 3281 | ret = convert_to_probe_trace_events(&pevs[i], &pevs[i].tevs); |
146a1439 | 3282 | if (ret < 0) |
844dffa5 | 3283 | return ret; |
12fae5ef | 3284 | pevs[i].ntevs = ret; |
e0faa8d3 | 3285 | } |
b031220d MH |
3286 | /* This just release blacklist only if allocated */ |
3287 | kprobe_blacklist__release(); | |
e0faa8d3 | 3288 | |
844dffa5 NK |
3289 | return 0; |
3290 | } | |
3291 | ||
1c20b1d1 MH |
3292 | static int show_probe_trace_event(struct probe_trace_event *tev) |
3293 | { | |
3294 | char *buf = synthesize_probe_trace_command(tev); | |
3295 | ||
3296 | if (!buf) { | |
3297 | pr_debug("Failed to synthesize probe trace event.\n"); | |
3298 | return -EINVAL; | |
3299 | } | |
3300 | ||
3301 | /* Showing definition always go stdout */ | |
3302 | printf("%s\n", buf); | |
3303 | free(buf); | |
3304 | ||
3305 | return 0; | |
3306 | } | |
3307 | ||
3308 | int show_probe_trace_events(struct perf_probe_event *pevs, int npevs) | |
3309 | { | |
3310 | struct strlist *namelist = strlist__new(NULL, NULL); | |
3311 | struct probe_trace_event *tev; | |
3312 | struct perf_probe_event *pev; | |
3313 | int i, j, ret = 0; | |
3314 | ||
3315 | if (!namelist) | |
3316 | return -ENOMEM; | |
3317 | ||
3318 | for (j = 0; j < npevs && !ret; j++) { | |
3319 | pev = &pevs[j]; | |
3320 | for (i = 0; i < pev->ntevs && !ret; i++) { | |
3321 | tev = &pev->tevs[i]; | |
3322 | /* Skip if the symbol is out of .text or blacklisted */ | |
3323 | if (!tev->point.symbol && !pev->uprobes) | |
3324 | continue; | |
3325 | ||
3326 | /* Set new name for tev (and update namelist) */ | |
3327 | ret = probe_trace_event__set_name(tev, pev, | |
3328 | namelist, true); | |
3329 | if (!ret) | |
3330 | ret = show_probe_trace_event(tev); | |
3331 | } | |
3332 | } | |
3333 | strlist__delete(namelist); | |
3334 | ||
3335 | return ret; | |
3336 | } | |
3337 | ||
12fae5ef | 3338 | int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs) |
844dffa5 NK |
3339 | { |
3340 | int i, ret = 0; | |
3341 | ||
4235b045 | 3342 | /* Loop 2: add all events */ |
8635bf6e | 3343 | for (i = 0; i < npevs; i++) { |
12fae5ef WN |
3344 | ret = __add_probe_trace_events(&pevs[i], pevs[i].tevs, |
3345 | pevs[i].ntevs, | |
ddb2f58f | 3346 | probe_conf.force_add); |
fbee632d ACM |
3347 | if (ret < 0) |
3348 | break; | |
3349 | } | |
844dffa5 NK |
3350 | return ret; |
3351 | } | |
3352 | ||
12fae5ef | 3353 | void cleanup_perf_probe_events(struct perf_probe_event *pevs, int npevs) |
844dffa5 NK |
3354 | { |
3355 | int i, j; | |
3356 | ||
449e5b24 MH |
3357 | /* Loop 3: cleanup and free trace events */ |
3358 | for (i = 0; i < npevs; i++) { | |
12fae5ef WN |
3359 | for (j = 0; j < pevs[i].ntevs; j++) |
3360 | clear_probe_trace_event(&pevs[i].tevs[j]); | |
3361 | zfree(&pevs[i].tevs); | |
3362 | pevs[i].ntevs = 0; | |
a43aac29 | 3363 | clear_perf_probe_event(&pevs[i]); |
449e5b24 | 3364 | } |
844dffa5 NK |
3365 | } |
3366 | ||
3367 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs) | |
3368 | { | |
3369 | int ret; | |
844dffa5 | 3370 | |
9bae1e8c NK |
3371 | ret = init_probe_symbol_maps(pevs->uprobes); |
3372 | if (ret < 0) | |
3373 | return ret; | |
3374 | ||
12fae5ef | 3375 | ret = convert_perf_probe_events(pevs, npevs); |
844dffa5 | 3376 | if (ret == 0) |
12fae5ef | 3377 | ret = apply_perf_probe_events(pevs, npevs); |
844dffa5 | 3378 | |
12fae5ef | 3379 | cleanup_perf_probe_events(pevs, npevs); |
146a1439 | 3380 | |
9bae1e8c | 3381 | exit_probe_symbol_maps(); |
146a1439 | 3382 | return ret; |
e0faa8d3 MH |
3383 | } |
3384 | ||
307a464b | 3385 | int del_perf_probe_events(struct strfilter *filter) |
fa28244d | 3386 | { |
307a464b | 3387 | int ret, ret2, ufd = -1, kfd = -1; |
307a464b MH |
3388 | char *str = strfilter__string(filter); |
3389 | ||
3390 | if (!str) | |
3391 | return -EINVAL; | |
3392 | ||
fa28244d | 3393 | /* Get current event names */ |
92f6c72e MH |
3394 | ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW); |
3395 | if (ret < 0) | |
3396 | goto out; | |
467ec085 | 3397 | |
92f6c72e | 3398 | ret = probe_file__del_events(kfd, filter); |
307a464b | 3399 | if (ret < 0 && ret != -ENOENT) |
225466f1 | 3400 | goto error; |
225466f1 | 3401 | |
92f6c72e | 3402 | ret2 = probe_file__del_events(ufd, filter); |
dddc7ee3 | 3403 | if (ret2 < 0 && ret2 != -ENOENT) { |
307a464b | 3404 | ret = ret2; |
dddc7ee3 MH |
3405 | goto error; |
3406 | } | |
dddc7ee3 | 3407 | ret = 0; |
225466f1 SD |
3408 | |
3409 | error: | |
92f6c72e | 3410 | if (kfd >= 0) |
225466f1 | 3411 | close(kfd); |
92f6c72e | 3412 | if (ufd >= 0) |
225466f1 | 3413 | close(ufd); |
92f6c72e | 3414 | out: |
307a464b | 3415 | free(str); |
146a1439 MH |
3416 | |
3417 | return ret; | |
fa28244d | 3418 | } |
225466f1 | 3419 | |
2df58634 MH |
3420 | int show_available_funcs(const char *target, struct strfilter *_filter, |
3421 | bool user) | |
e80711ca | 3422 | { |
fd227598 | 3423 | struct rb_node *nd; |
e80711ca MH |
3424 | struct map *map; |
3425 | int ret; | |
3426 | ||
9bae1e8c | 3427 | ret = init_probe_symbol_maps(user); |
e80711ca MH |
3428 | if (ret < 0) |
3429 | return ret; | |
3430 | ||
2df58634 | 3431 | /* Get a symbol map */ |
eebc509b | 3432 | map = get_target_map(target, user); |
e80711ca | 3433 | if (!map) { |
2df58634 | 3434 | pr_err("Failed to get a map for %s\n", (target) ? : "kernel"); |
e80711ca MH |
3435 | return -EINVAL; |
3436 | } | |
225466f1 | 3437 | |
be39db9f | 3438 | ret = map__load(map); |
e7049342 MH |
3439 | if (ret) { |
3440 | if (ret == -2) { | |
3441 | char *str = strfilter__string(_filter); | |
3442 | pr_err("Failed to find symbols matched to \"%s\"\n", | |
3443 | str); | |
3444 | free(str); | |
3445 | } else | |
3446 | pr_err("Failed to load symbols in %s\n", | |
3447 | (target) ? : "kernel"); | |
2df58634 MH |
3448 | goto end; |
3449 | } | |
3450 | if (!dso__sorted_by_name(map->dso, map->type)) | |
3451 | dso__sort_by_name(map->dso, map->type); | |
225466f1 | 3452 | |
2df58634 MH |
3453 | /* Show all (filtered) symbols */ |
3454 | setup_pager(); | |
fd227598 ACM |
3455 | |
3456 | for (nd = rb_first(&map->dso->symbol_names[map->type]); nd; nd = rb_next(nd)) { | |
3457 | struct symbol_name_rb_node *pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); | |
3458 | ||
3459 | if (strfilter__compare(_filter, pos->sym.name)) | |
3460 | printf("%s\n", pos->sym.name); | |
3461 | } | |
3462 | ||
2df58634 | 3463 | end: |
eebc509b | 3464 | map__put(map); |
9bae1e8c | 3465 | exit_probe_symbol_maps(); |
225466f1 | 3466 | |
2df58634 | 3467 | return ret; |
225466f1 SD |
3468 | } |
3469 | ||
da15bd9d WN |
3470 | int copy_to_probe_trace_arg(struct probe_trace_arg *tvar, |
3471 | struct perf_probe_arg *pvar) | |
3472 | { | |
3473 | tvar->value = strdup(pvar->var); | |
3474 | if (tvar->value == NULL) | |
3475 | return -ENOMEM; | |
3476 | if (pvar->type) { | |
3477 | tvar->type = strdup(pvar->type); | |
3478 | if (tvar->type == NULL) | |
3479 | return -ENOMEM; | |
3480 | } | |
3481 | if (pvar->name) { | |
3482 | tvar->name = strdup(pvar->name); | |
3483 | if (tvar->name == NULL) | |
3484 | return -ENOMEM; | |
3485 | } else | |
3486 | tvar->name = NULL; | |
3487 | return 0; | |
3488 | } |