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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 | ||
fd20e811 | 22 | #include <inttypes.h> |
50656eec MH |
23 | #include <sys/utsname.h> |
24 | #include <sys/types.h> | |
25 | #include <sys/stat.h> | |
26 | #include <fcntl.h> | |
27 | #include <errno.h> | |
28 | #include <stdio.h> | |
29 | #include <unistd.h> | |
30 | #include <stdlib.h> | |
31 | #include <string.h> | |
4de189fe MH |
32 | #include <stdarg.h> |
33 | #include <limits.h> | |
e80711ca | 34 | #include <elf.h> |
50656eec | 35 | |
31facc5f | 36 | #include "util.h" |
50656eec | 37 | #include "event.h" |
4de189fe | 38 | #include "strlist.h" |
8ec20b17 | 39 | #include "strfilter.h" |
50656eec | 40 | #include "debug.h" |
72041334 | 41 | #include "cache.h" |
631c9def | 42 | #include "color.h" |
e0faa8d3 MH |
43 | #include "symbol.h" |
44 | #include "thread.h" | |
4605eab3 | 45 | #include <api/fs/fs.h> |
1d037ca1 | 46 | #include "trace-event.h" /* For __maybe_unused */ |
50656eec | 47 | #include "probe-event.h" |
4235b045 | 48 | #include "probe-finder.h" |
92f6c72e | 49 | #include "probe-file.h" |
225466f1 | 50 | #include "session.h" |
a067558e | 51 | #include "string2.h" |
50656eec | 52 | |
3d689ed6 ACM |
53 | #include "sane_ctype.h" |
54 | ||
50656eec MH |
55 | #define PERFPROBE_GROUP "probe" |
56 | ||
f4d7da49 | 57 | bool probe_event_dry_run; /* Dry run flag */ |
ddb2f58f | 58 | struct probe_conf probe_conf; |
f4d7da49 | 59 | |
146a1439 | 60 | #define semantic_error(msg ...) pr_err("Semantic error :" msg) |
50656eec | 61 | |
92f6c72e | 62 | int e_snprintf(char *str, size_t size, const char *format, ...) |
4de189fe MH |
63 | { |
64 | int ret; | |
65 | va_list ap; | |
66 | va_start(ap, format); | |
67 | ret = vsnprintf(str, size, format, ap); | |
68 | va_end(ap); | |
69 | if (ret >= (int)size) | |
70 | ret = -E2BIG; | |
71 | return ret; | |
72 | } | |
73 | ||
ee45b6c2 | 74 | static struct machine *host_machine; |
e0faa8d3 | 75 | |
469b9b88 | 76 | /* Initialize symbol maps and path of vmlinux/modules */ |
9bae1e8c | 77 | int init_probe_symbol_maps(bool user_only) |
e0faa8d3 | 78 | { |
146a1439 MH |
79 | int ret; |
80 | ||
e0faa8d3 | 81 | symbol_conf.sort_by_name = true; |
680d926a | 82 | symbol_conf.allow_aliases = true; |
0a7e6d1b | 83 | ret = symbol__init(NULL); |
146a1439 MH |
84 | if (ret < 0) { |
85 | pr_debug("Failed to init symbol map.\n"); | |
86 | goto out; | |
87 | } | |
e0faa8d3 | 88 | |
ee45b6c2 MH |
89 | if (host_machine || user_only) /* already initialized */ |
90 | return 0; | |
d28c6223 | 91 | |
ee45b6c2 MH |
92 | if (symbol_conf.vmlinux_name) |
93 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
94 | ||
95 | host_machine = machine__new_host(); | |
96 | if (!host_machine) { | |
97 | pr_debug("machine__new_host() failed.\n"); | |
98 | symbol__exit(); | |
99 | ret = -1; | |
469b9b88 | 100 | } |
146a1439 MH |
101 | out: |
102 | if (ret < 0) | |
103 | pr_warning("Failed to init vmlinux path.\n"); | |
104 | return ret; | |
e0faa8d3 MH |
105 | } |
106 | ||
9bae1e8c | 107 | void exit_probe_symbol_maps(void) |
ee45b6c2 | 108 | { |
32ca678d ACM |
109 | machine__delete(host_machine); |
110 | host_machine = NULL; | |
ee45b6c2 MH |
111 | symbol__exit(); |
112 | } | |
113 | ||
469b9b88 MH |
114 | static struct symbol *__find_kernel_function_by_name(const char *name, |
115 | struct map **mapp) | |
116 | { | |
be39db9f | 117 | return machine__find_kernel_function_by_name(host_machine, name, mapp); |
469b9b88 MH |
118 | } |
119 | ||
8f33f7de MH |
120 | static struct symbol *__find_kernel_function(u64 addr, struct map **mapp) |
121 | { | |
be39db9f | 122 | return machine__find_kernel_function(host_machine, addr, mapp); |
8f33f7de MH |
123 | } |
124 | ||
125 | static struct ref_reloc_sym *kernel_get_ref_reloc_sym(void) | |
126 | { | |
127 | /* kmap->ref_reloc_sym should be set if host_machine is initialized */ | |
128 | struct kmap *kmap; | |
a5e813c6 | 129 | struct map *map = machine__kernel_map(host_machine); |
8f33f7de | 130 | |
be39db9f | 131 | if (map__load(map) < 0) |
8f33f7de MH |
132 | return NULL; |
133 | ||
77e65977 | 134 | kmap = map__kmap(map); |
ba92732e WN |
135 | if (!kmap) |
136 | return NULL; | |
8f33f7de MH |
137 | return kmap->ref_reloc_sym; |
138 | } | |
139 | ||
9b239a12 MH |
140 | static int kernel_get_symbol_address_by_name(const char *name, u64 *addr, |
141 | bool reloc, bool reladdr) | |
8f33f7de MH |
142 | { |
143 | struct ref_reloc_sym *reloc_sym; | |
144 | struct symbol *sym; | |
145 | struct map *map; | |
146 | ||
147 | /* ref_reloc_sym is just a label. Need a special fix*/ | |
148 | reloc_sym = kernel_get_ref_reloc_sym(); | |
149 | if (reloc_sym && strcmp(name, reloc_sym->name) == 0) | |
9b239a12 | 150 | *addr = (reloc) ? reloc_sym->addr : reloc_sym->unrelocated_addr; |
8f33f7de MH |
151 | else { |
152 | sym = __find_kernel_function_by_name(name, &map); | |
9b239a12 MH |
153 | if (!sym) |
154 | return -ENOENT; | |
155 | *addr = map->unmap_ip(map, sym->start) - | |
156 | ((reloc) ? 0 : map->reloc) - | |
157 | ((reladdr) ? map->start : 0); | |
8f33f7de MH |
158 | } |
159 | return 0; | |
160 | } | |
161 | ||
e80711ca MH |
162 | static struct map *kernel_get_module_map(const char *module) |
163 | { | |
ee45b6c2 | 164 | struct map_groups *grp = &host_machine->kmaps; |
1eee78ae | 165 | struct maps *maps = &grp->maps[MAP__FUNCTION]; |
4bb7123d | 166 | struct map *pos; |
e80711ca | 167 | |
14a8fd7c MH |
168 | /* A file path -- this is an offline module */ |
169 | if (module && strchr(module, '/')) | |
eebc509b | 170 | return dso__new_map(module); |
14a8fd7c | 171 | |
e80711ca MH |
172 | if (!module) |
173 | module = "kernel"; | |
174 | ||
4bb7123d | 175 | for (pos = maps__first(maps); pos; pos = map__next(pos)) { |
cb3f3378 | 176 | /* short_name is "[module]" */ |
e80711ca | 177 | if (strncmp(pos->dso->short_name + 1, module, |
cb3f3378 KK |
178 | pos->dso->short_name_len - 2) == 0 && |
179 | module[pos->dso->short_name_len - 2] == '\0') { | |
eebc509b | 180 | map__get(pos); |
e80711ca MH |
181 | return pos; |
182 | } | |
183 | } | |
184 | return NULL; | |
185 | } | |
186 | ||
99e608b5 | 187 | struct map *get_target_map(const char *target, bool user) |
9b118aca MH |
188 | { |
189 | /* Init maps of given executable or kernel */ | |
190 | if (user) | |
191 | return dso__new_map(target); | |
192 | else | |
193 | return kernel_get_module_map(target); | |
194 | } | |
195 | ||
fb7345bb MH |
196 | static int convert_exec_to_group(const char *exec, char **result) |
197 | { | |
198 | char *ptr1, *ptr2, *exec_copy; | |
199 | char buf[64]; | |
200 | int ret; | |
201 | ||
202 | exec_copy = strdup(exec); | |
203 | if (!exec_copy) | |
204 | return -ENOMEM; | |
205 | ||
206 | ptr1 = basename(exec_copy); | |
207 | if (!ptr1) { | |
208 | ret = -EINVAL; | |
209 | goto out; | |
210 | } | |
211 | ||
ead1a574 | 212 | for (ptr2 = ptr1; *ptr2 != '\0'; ptr2++) { |
35726d3a MH |
213 | if (!isalnum(*ptr2) && *ptr2 != '_') { |
214 | *ptr2 = '\0'; | |
215 | break; | |
216 | } | |
217 | } | |
218 | ||
fb7345bb MH |
219 | ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1); |
220 | if (ret < 0) | |
221 | goto out; | |
222 | ||
223 | *result = strdup(buf); | |
224 | ret = *result ? 0 : -ENOMEM; | |
225 | ||
226 | out: | |
227 | free(exec_copy); | |
228 | return ret; | |
229 | } | |
230 | ||
9b118aca MH |
231 | static void clear_perf_probe_point(struct perf_probe_point *pp) |
232 | { | |
233 | free(pp->file); | |
234 | free(pp->function); | |
235 | free(pp->lazy_line); | |
236 | } | |
237 | ||
eb948e50 MH |
238 | static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs) |
239 | { | |
240 | int i; | |
241 | ||
242 | for (i = 0; i < ntevs; i++) | |
243 | clear_probe_trace_event(tevs + i); | |
244 | } | |
245 | ||
b031220d MH |
246 | static bool kprobe_blacklist__listed(unsigned long address); |
247 | static bool kprobe_warn_out_range(const char *symbol, unsigned long address) | |
248 | { | |
9b239a12 MH |
249 | u64 etext_addr = 0; |
250 | int ret; | |
7c31bb8c | 251 | |
b031220d | 252 | /* Get the address of _etext for checking non-probable text symbol */ |
9b239a12 MH |
253 | ret = kernel_get_symbol_address_by_name("_etext", &etext_addr, |
254 | false, false); | |
7c31bb8c | 255 | |
9b239a12 | 256 | if (ret == 0 && etext_addr < address) |
b031220d MH |
257 | pr_warning("%s is out of .text, skip it.\n", symbol); |
258 | else if (kprobe_blacklist__listed(address)) | |
259 | pr_warning("%s is blacklisted function, skip it.\n", symbol); | |
260 | else | |
261 | return false; | |
262 | ||
263 | return true; | |
264 | } | |
265 | ||
c61fb959 RB |
266 | /* |
267 | * @module can be module name of module file path. In case of path, | |
268 | * inspect elf and find out what is actual module name. | |
269 | * Caller has to free mod_name after using it. | |
270 | */ | |
271 | static char *find_module_name(const char *module) | |
272 | { | |
273 | int fd; | |
274 | Elf *elf; | |
275 | GElf_Ehdr ehdr; | |
276 | GElf_Shdr shdr; | |
277 | Elf_Data *data; | |
278 | Elf_Scn *sec; | |
279 | char *mod_name = NULL; | |
1f2ed153 | 280 | int name_offset; |
c61fb959 RB |
281 | |
282 | fd = open(module, O_RDONLY); | |
283 | if (fd < 0) | |
284 | return NULL; | |
285 | ||
286 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
287 | if (elf == NULL) | |
288 | goto elf_err; | |
289 | ||
290 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
291 | goto ret_err; | |
292 | ||
293 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
294 | ".gnu.linkonce.this_module", NULL); | |
295 | if (!sec) | |
296 | goto ret_err; | |
297 | ||
298 | data = elf_getdata(sec, NULL); | |
299 | if (!data || !data->d_buf) | |
300 | goto ret_err; | |
301 | ||
1f2ed153 MH |
302 | /* |
303 | * NOTE: | |
304 | * '.gnu.linkonce.this_module' section of kernel module elf directly | |
305 | * maps to 'struct module' from linux/module.h. This section contains | |
306 | * actual module name which will be used by kernel after loading it. | |
307 | * But, we cannot use 'struct module' here since linux/module.h is not | |
308 | * exposed to user-space. Offset of 'name' has remained same from long | |
309 | * time, so hardcoding it here. | |
310 | */ | |
311 | if (ehdr.e_ident[EI_CLASS] == ELFCLASS32) | |
312 | name_offset = 12; | |
313 | else /* expect ELFCLASS64 by default */ | |
314 | name_offset = 24; | |
315 | ||
316 | mod_name = strdup((char *)data->d_buf + name_offset); | |
c61fb959 RB |
317 | |
318 | ret_err: | |
319 | elf_end(elf); | |
320 | elf_err: | |
321 | close(fd); | |
322 | return mod_name; | |
323 | } | |
324 | ||
89fe808a | 325 | #ifdef HAVE_DWARF_SUPPORT |
60fb7742 WN |
326 | |
327 | static int kernel_get_module_dso(const char *module, struct dso **pdso) | |
328 | { | |
329 | struct dso *dso; | |
330 | struct map *map; | |
331 | const char *vmlinux_name; | |
332 | int ret = 0; | |
333 | ||
334 | if (module) { | |
266fa2b2 ACM |
335 | char module_name[128]; |
336 | ||
337 | snprintf(module_name, sizeof(module_name), "[%s]", module); | |
338 | map = map_groups__find_by_name(&host_machine->kmaps, MAP__FUNCTION, module_name); | |
339 | if (map) { | |
340 | dso = map->dso; | |
341 | goto found; | |
60fb7742 WN |
342 | } |
343 | pr_debug("Failed to find module %s.\n", module); | |
344 | return -ENOENT; | |
345 | } | |
346 | ||
a5e813c6 | 347 | map = machine__kernel_map(host_machine); |
60fb7742 WN |
348 | dso = map->dso; |
349 | ||
350 | vmlinux_name = symbol_conf.vmlinux_name; | |
351 | dso->load_errno = 0; | |
352 | if (vmlinux_name) | |
be39db9f | 353 | ret = dso__load_vmlinux(dso, map, vmlinux_name, false); |
60fb7742 | 354 | else |
be39db9f | 355 | ret = dso__load_vmlinux_path(dso, map); |
60fb7742 WN |
356 | found: |
357 | *pdso = dso; | |
358 | return ret; | |
359 | } | |
360 | ||
9b118aca MH |
361 | /* |
362 | * Some binaries like glibc have special symbols which are on the symbol | |
363 | * table, but not in the debuginfo. If we can find the address of the | |
364 | * symbol from map, we can translate the address back to the probe point. | |
365 | */ | |
366 | static int find_alternative_probe_point(struct debuginfo *dinfo, | |
367 | struct perf_probe_point *pp, | |
368 | struct perf_probe_point *result, | |
369 | const char *target, bool uprobes) | |
370 | { | |
371 | struct map *map = NULL; | |
372 | struct symbol *sym; | |
373 | u64 address = 0; | |
374 | int ret = -ENOENT; | |
375 | ||
376 | /* This can work only for function-name based one */ | |
377 | if (!pp->function || pp->file) | |
378 | return -ENOTSUP; | |
379 | ||
380 | map = get_target_map(target, uprobes); | |
381 | if (!map) | |
382 | return -EINVAL; | |
383 | ||
384 | /* Find the address of given function */ | |
385 | map__for_each_symbol_by_name(map, pp->function, sym) { | |
e6d7c91c MH |
386 | if (uprobes) |
387 | address = sym->start; | |
388 | else | |
8e34189b | 389 | address = map->unmap_ip(map, sym->start) - map->reloc; |
e578da3b | 390 | break; |
9b118aca MH |
391 | } |
392 | if (!address) { | |
393 | ret = -ENOENT; | |
394 | goto out; | |
395 | } | |
f6c15621 WN |
396 | pr_debug("Symbol %s address found : %" PRIx64 "\n", |
397 | pp->function, address); | |
9b118aca MH |
398 | |
399 | ret = debuginfo__find_probe_point(dinfo, (unsigned long)address, | |
400 | result); | |
401 | if (ret <= 0) | |
402 | ret = (!ret) ? -ENOENT : ret; | |
403 | else { | |
404 | result->offset += pp->offset; | |
405 | result->line += pp->line; | |
9d7b45c5 | 406 | result->retprobe = pp->retprobe; |
9b118aca MH |
407 | ret = 0; |
408 | } | |
409 | ||
410 | out: | |
eebc509b | 411 | map__put(map); |
9b118aca MH |
412 | return ret; |
413 | ||
414 | } | |
415 | ||
416 | static int get_alternative_probe_event(struct debuginfo *dinfo, | |
417 | struct perf_probe_event *pev, | |
44225521 | 418 | struct perf_probe_point *tmp) |
9b118aca MH |
419 | { |
420 | int ret; | |
421 | ||
422 | memcpy(tmp, &pev->point, sizeof(*tmp)); | |
423 | memset(&pev->point, 0, sizeof(pev->point)); | |
424 | ret = find_alternative_probe_point(dinfo, tmp, &pev->point, | |
44225521 | 425 | pev->target, pev->uprobes); |
9b118aca MH |
426 | if (ret < 0) |
427 | memcpy(&pev->point, tmp, sizeof(*tmp)); | |
428 | ||
429 | return ret; | |
430 | } | |
a15ad2f5 | 431 | |
811dd2ae MH |
432 | static int get_alternative_line_range(struct debuginfo *dinfo, |
433 | struct line_range *lr, | |
434 | const char *target, bool user) | |
435 | { | |
6d4a4896 DA |
436 | struct perf_probe_point pp = { .function = lr->function, |
437 | .file = lr->file, | |
438 | .line = lr->start }; | |
439 | struct perf_probe_point result; | |
811dd2ae MH |
440 | int ret, len = 0; |
441 | ||
6d4a4896 DA |
442 | memset(&result, 0, sizeof(result)); |
443 | ||
811dd2ae MH |
444 | if (lr->end != INT_MAX) |
445 | len = lr->end - lr->start; | |
446 | ret = find_alternative_probe_point(dinfo, &pp, &result, | |
447 | target, user); | |
448 | if (!ret) { | |
449 | lr->function = result.function; | |
450 | lr->file = result.file; | |
451 | lr->start = result.line; | |
452 | if (lr->end != INT_MAX) | |
453 | lr->end = lr->start + len; | |
454 | clear_perf_probe_point(&pp); | |
455 | } | |
456 | return ret; | |
457 | } | |
458 | ||
ff741783 | 459 | /* Open new debuginfo of given module */ |
92561cb7 | 460 | static struct debuginfo *open_debuginfo(const char *module, bool silent) |
e0faa8d3 | 461 | { |
a15ad2f5 | 462 | const char *path = module; |
419e8738 MH |
463 | char reason[STRERR_BUFSIZE]; |
464 | struct debuginfo *ret = NULL; | |
465 | struct dso *dso = NULL; | |
466 | int err; | |
ff741783 | 467 | |
a15ad2f5 | 468 | if (!module || !strchr(module, '/')) { |
419e8738 MH |
469 | err = kernel_get_module_dso(module, &dso); |
470 | if (err < 0) { | |
471 | if (!dso || dso->load_errno == 0) { | |
c8b5f2c9 | 472 | if (!str_error_r(-err, reason, STRERR_BUFSIZE)) |
419e8738 MH |
473 | strcpy(reason, "(unknown)"); |
474 | } else | |
475 | dso__strerror_load(dso, reason, STRERR_BUFSIZE); | |
92561cb7 | 476 | if (!silent) |
419e8738 MH |
477 | pr_err("Failed to find the path for %s: %s\n", |
478 | module ?: "kernel", reason); | |
14a8fd7c MH |
479 | return NULL; |
480 | } | |
419e8738 | 481 | path = dso->long_name; |
e0faa8d3 | 482 | } |
92561cb7 MH |
483 | ret = debuginfo__new(path); |
484 | if (!ret && !silent) { | |
485 | pr_warning("The %s file has no debug information.\n", path); | |
486 | if (!module || !strtailcmp(path, ".ko")) | |
487 | pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, "); | |
488 | else | |
489 | pr_warning("Rebuild with -g, "); | |
490 | pr_warning("or install an appropriate debuginfo package.\n"); | |
491 | } | |
492 | return ret; | |
e0faa8d3 | 493 | } |
4b4da7f7 | 494 | |
7737af01 MH |
495 | /* For caching the last debuginfo */ |
496 | static struct debuginfo *debuginfo_cache; | |
497 | static char *debuginfo_cache_path; | |
498 | ||
499 | static struct debuginfo *debuginfo_cache__open(const char *module, bool silent) | |
500 | { | |
20f49859 MH |
501 | const char *path = module; |
502 | ||
503 | /* If the module is NULL, it should be the kernel. */ | |
504 | if (!module) | |
505 | path = "kernel"; | |
506 | ||
507 | if (debuginfo_cache_path && !strcmp(debuginfo_cache_path, path)) | |
7737af01 MH |
508 | goto out; |
509 | ||
510 | /* Copy module path */ | |
511 | free(debuginfo_cache_path); | |
20f49859 MH |
512 | debuginfo_cache_path = strdup(path); |
513 | if (!debuginfo_cache_path) { | |
514 | debuginfo__delete(debuginfo_cache); | |
515 | debuginfo_cache = NULL; | |
516 | goto out; | |
7737af01 MH |
517 | } |
518 | ||
519 | debuginfo_cache = open_debuginfo(module, silent); | |
520 | if (!debuginfo_cache) | |
521 | zfree(&debuginfo_cache_path); | |
522 | out: | |
523 | return debuginfo_cache; | |
524 | } | |
525 | ||
526 | static void debuginfo_cache__exit(void) | |
527 | { | |
528 | debuginfo__delete(debuginfo_cache); | |
529 | debuginfo_cache = NULL; | |
530 | zfree(&debuginfo_cache_path); | |
531 | } | |
532 | ||
92561cb7 | 533 | |
99ca4233 MH |
534 | static int get_text_start_address(const char *exec, unsigned long *address) |
535 | { | |
536 | Elf *elf; | |
537 | GElf_Ehdr ehdr; | |
538 | GElf_Shdr shdr; | |
539 | int fd, ret = -ENOENT; | |
540 | ||
541 | fd = open(exec, O_RDONLY); | |
542 | if (fd < 0) | |
543 | return -errno; | |
544 | ||
545 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
062d6c2a MH |
546 | if (elf == NULL) { |
547 | ret = -EINVAL; | |
548 | goto out_close; | |
549 | } | |
99ca4233 MH |
550 | |
551 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
552 | goto out; | |
553 | ||
554 | if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL)) | |
555 | goto out; | |
556 | ||
557 | *address = shdr.sh_addr - shdr.sh_offset; | |
558 | ret = 0; | |
559 | out: | |
560 | elf_end(elf); | |
062d6c2a MH |
561 | out_close: |
562 | close(fd); | |
563 | ||
99ca4233 MH |
564 | return ret; |
565 | } | |
566 | ||
5a6f6314 MH |
567 | /* |
568 | * Convert trace point to probe point with debuginfo | |
569 | */ | |
570 | static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp, | |
571 | struct perf_probe_point *pp, | |
572 | bool is_kprobe) | |
573 | { | |
574 | struct debuginfo *dinfo = NULL; | |
575 | unsigned long stext = 0; | |
576 | u64 addr = tp->address; | |
577 | int ret = -ENOENT; | |
578 | ||
579 | /* convert the address to dwarf address */ | |
580 | if (!is_kprobe) { | |
581 | if (!addr) { | |
582 | ret = -EINVAL; | |
583 | goto error; | |
584 | } | |
585 | ret = get_text_start_address(tp->module, &stext); | |
586 | if (ret < 0) | |
587 | goto error; | |
588 | addr += stext; | |
e486367f | 589 | } else if (tp->symbol) { |
9b239a12 MH |
590 | /* If the module is given, this returns relative address */ |
591 | ret = kernel_get_symbol_address_by_name(tp->symbol, &addr, | |
592 | false, !!tp->module); | |
593 | if (ret != 0) | |
5a6f6314 MH |
594 | goto error; |
595 | addr += tp->offset; | |
596 | } | |
597 | ||
598 | pr_debug("try to find information at %" PRIx64 " in %s\n", addr, | |
599 | tp->module ? : "kernel"); | |
600 | ||
bb963e16 | 601 | dinfo = debuginfo_cache__open(tp->module, verbose <= 0); |
7737af01 | 602 | if (dinfo) |
5a6f6314 MH |
603 | ret = debuginfo__find_probe_point(dinfo, |
604 | (unsigned long)addr, pp); | |
7737af01 | 605 | else |
5a6f6314 | 606 | ret = -ENOENT; |
5a6f6314 MH |
607 | |
608 | if (ret > 0) { | |
609 | pp->retprobe = tp->retprobe; | |
610 | return 0; | |
611 | } | |
612 | error: | |
613 | pr_debug("Failed to find corresponding probes from debuginfo.\n"); | |
614 | return ret ? : -ENOENT; | |
615 | } | |
616 | ||
3e96dac7 MH |
617 | /* Adjust symbol name and address */ |
618 | static int post_process_probe_trace_point(struct probe_trace_point *tp, | |
619 | struct map *map, unsigned long offs) | |
620 | { | |
621 | struct symbol *sym; | |
7598f8bc | 622 | u64 addr = tp->address - offs; |
3e96dac7 MH |
623 | |
624 | sym = map__find_symbol(map, addr); | |
625 | if (!sym) | |
626 | return -ENOENT; | |
627 | ||
628 | if (strcmp(sym->name, tp->symbol)) { | |
629 | /* If we have no realname, use symbol for it */ | |
630 | if (!tp->realname) | |
631 | tp->realname = tp->symbol; | |
632 | else | |
633 | free(tp->symbol); | |
634 | tp->symbol = strdup(sym->name); | |
635 | if (!tp->symbol) | |
636 | return -ENOMEM; | |
637 | } | |
638 | tp->offset = addr - sym->start; | |
639 | tp->address -= offs; | |
640 | ||
641 | return 0; | |
642 | } | |
643 | ||
8a937a25 MH |
644 | /* |
645 | * Rename DWARF symbols to ELF symbols -- gcc sometimes optimizes functions | |
646 | * and generate new symbols with suffixes such as .constprop.N or .isra.N | |
647 | * etc. Since those symbols are not recorded in DWARF, we have to find | |
648 | * correct generated symbols from offline ELF binary. | |
649 | * For online kernel or uprobes we don't need this because those are | |
650 | * rebased on _text, or already a section relative address. | |
651 | */ | |
652 | static int | |
653 | post_process_offline_probe_trace_events(struct probe_trace_event *tevs, | |
654 | int ntevs, const char *pathname) | |
655 | { | |
8a937a25 MH |
656 | struct map *map; |
657 | unsigned long stext = 0; | |
3e96dac7 | 658 | int i, ret = 0; |
8a937a25 MH |
659 | |
660 | /* Prepare a map for offline binary */ | |
661 | map = dso__new_map(pathname); | |
662 | if (!map || get_text_start_address(pathname, &stext) < 0) { | |
663 | pr_warning("Failed to get ELF symbols for %s\n", pathname); | |
664 | return -EINVAL; | |
665 | } | |
666 | ||
667 | for (i = 0; i < ntevs; i++) { | |
3e96dac7 MH |
668 | ret = post_process_probe_trace_point(&tevs[i].point, |
669 | map, stext); | |
670 | if (ret < 0) | |
671 | break; | |
8a937a25 MH |
672 | } |
673 | map__put(map); | |
674 | ||
3e96dac7 | 675 | return ret; |
8a937a25 MH |
676 | } |
677 | ||
fb7345bb MH |
678 | static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs, |
679 | int ntevs, const char *exec) | |
680 | { | |
681 | int i, ret = 0; | |
eb948e50 | 682 | unsigned long stext = 0; |
fb7345bb MH |
683 | |
684 | if (!exec) | |
685 | return 0; | |
686 | ||
687 | ret = get_text_start_address(exec, &stext); | |
688 | if (ret < 0) | |
689 | return ret; | |
690 | ||
691 | for (i = 0; i < ntevs && ret >= 0; i++) { | |
981a2379 | 692 | /* point.address is the addres of point.symbol + point.offset */ |
eb948e50 | 693 | tevs[i].point.address -= stext; |
fb7345bb | 694 | tevs[i].point.module = strdup(exec); |
eb948e50 | 695 | if (!tevs[i].point.module) { |
fb7345bb MH |
696 | ret = -ENOMEM; |
697 | break; | |
698 | } | |
699 | tevs[i].uprobes = true; | |
700 | } | |
701 | ||
702 | return ret; | |
703 | } | |
704 | ||
613f050d MH |
705 | static int |
706 | post_process_module_probe_trace_events(struct probe_trace_event *tevs, | |
707 | int ntevs, const char *module, | |
708 | struct debuginfo *dinfo) | |
190b57fc | 709 | { |
613f050d | 710 | Dwarf_Addr text_offs = 0; |
14a8fd7c | 711 | int i, ret = 0; |
63a29613 | 712 | char *mod_name = NULL; |
613f050d | 713 | struct map *map; |
14a8fd7c MH |
714 | |
715 | if (!module) | |
716 | return 0; | |
717 | ||
613f050d MH |
718 | map = get_target_map(module, false); |
719 | if (!map || debuginfo__get_text_offset(dinfo, &text_offs, true) < 0) { | |
720 | pr_warning("Failed to get ELF symbols for %s\n", module); | |
721 | return -EINVAL; | |
722 | } | |
14a8fd7c | 723 | |
613f050d | 724 | mod_name = find_module_name(module); |
190b57fc | 725 | for (i = 0; i < ntevs; i++) { |
613f050d MH |
726 | ret = post_process_probe_trace_point(&tevs[i].point, |
727 | map, (unsigned long)text_offs); | |
728 | if (ret < 0) | |
729 | break; | |
63a29613 RB |
730 | tevs[i].point.module = |
731 | strdup(mod_name ? mod_name : module); | |
14a8fd7c MH |
732 | if (!tevs[i].point.module) { |
733 | ret = -ENOMEM; | |
734 | break; | |
735 | } | |
190b57fc | 736 | } |
14a8fd7c | 737 | |
63a29613 | 738 | free(mod_name); |
613f050d MH |
739 | map__put(map); |
740 | ||
14a8fd7c | 741 | return ret; |
190b57fc MH |
742 | } |
743 | ||
d820456d RB |
744 | static int |
745 | post_process_kernel_probe_trace_events(struct probe_trace_event *tevs, | |
746 | int ntevs) | |
dfef99cd MH |
747 | { |
748 | struct ref_reloc_sym *reloc_sym; | |
749 | char *tmp; | |
5a51fcd1 | 750 | int i, skipped = 0; |
dfef99cd | 751 | |
428aff82 MH |
752 | /* Skip post process if the target is an offline kernel */ |
753 | if (symbol_conf.ignore_vmlinux_buildid) | |
8a937a25 MH |
754 | return post_process_offline_probe_trace_events(tevs, ntevs, |
755 | symbol_conf.vmlinux_name); | |
428aff82 | 756 | |
8f33f7de | 757 | reloc_sym = kernel_get_ref_reloc_sym(); |
dfef99cd MH |
758 | if (!reloc_sym) { |
759 | pr_warning("Relocated base symbol is not found!\n"); | |
760 | return -EINVAL; | |
761 | } | |
762 | ||
763 | for (i = 0; i < ntevs; i++) { | |
7ab31d94 NR |
764 | if (!tevs[i].point.address) |
765 | continue; | |
766 | if (tevs[i].point.retprobe && !kretprobe_offset_is_supported()) | |
b031220d MH |
767 | continue; |
768 | /* If we found a wrong one, mark it by NULL symbol */ | |
769 | if (kprobe_warn_out_range(tevs[i].point.symbol, | |
770 | tevs[i].point.address)) { | |
771 | tmp = NULL; | |
772 | skipped++; | |
773 | } else { | |
774 | tmp = strdup(reloc_sym->name); | |
775 | if (!tmp) | |
776 | return -ENOMEM; | |
dfef99cd | 777 | } |
b031220d MH |
778 | /* If we have no realname, use symbol for it */ |
779 | if (!tevs[i].point.realname) | |
780 | tevs[i].point.realname = tevs[i].point.symbol; | |
781 | else | |
782 | free(tevs[i].point.symbol); | |
783 | tevs[i].point.symbol = tmp; | |
784 | tevs[i].point.offset = tevs[i].point.address - | |
785 | reloc_sym->unrelocated_addr; | |
dfef99cd | 786 | } |
5a51fcd1 | 787 | return skipped; |
dfef99cd MH |
788 | } |
789 | ||
99e608b5 RB |
790 | void __weak |
791 | arch__post_process_probe_trace_events(struct perf_probe_event *pev __maybe_unused, | |
792 | int ntevs __maybe_unused) | |
793 | { | |
794 | } | |
795 | ||
d820456d | 796 | /* Post processing the probe events */ |
99e608b5 RB |
797 | static int post_process_probe_trace_events(struct perf_probe_event *pev, |
798 | struct probe_trace_event *tevs, | |
d820456d | 799 | int ntevs, const char *module, |
613f050d | 800 | bool uprobe, struct debuginfo *dinfo) |
d820456d | 801 | { |
99e608b5 | 802 | int ret; |
d820456d | 803 | |
99e608b5 RB |
804 | if (uprobe) |
805 | ret = add_exec_to_probe_trace_events(tevs, ntevs, module); | |
806 | else if (module) | |
d820456d | 807 | /* Currently ref_reloc_sym based probe is not for drivers */ |
613f050d MH |
808 | ret = post_process_module_probe_trace_events(tevs, ntevs, |
809 | module, dinfo); | |
99e608b5 RB |
810 | else |
811 | ret = post_process_kernel_probe_trace_events(tevs, ntevs); | |
d820456d | 812 | |
99e608b5 RB |
813 | if (ret >= 0) |
814 | arch__post_process_probe_trace_events(pev, ntevs); | |
815 | ||
816 | return ret; | |
d820456d RB |
817 | } |
818 | ||
4b4da7f7 | 819 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 820 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
ddb2f58f | 821 | struct probe_trace_event **tevs) |
4b4da7f7 MH |
822 | { |
823 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
9b118aca | 824 | struct perf_probe_point tmp; |
225466f1 | 825 | struct debuginfo *dinfo; |
190b57fc | 826 | int ntevs, ret = 0; |
4b4da7f7 | 827 | |
44225521 | 828 | dinfo = open_debuginfo(pev->target, !need_dwarf); |
ff741783 | 829 | if (!dinfo) { |
92561cb7 | 830 | if (need_dwarf) |
ff741783 | 831 | return -ENOENT; |
ff741783 | 832 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
833 | return 0; |
834 | } | |
835 | ||
dfef99cd | 836 | pr_debug("Try to find probe point from debuginfo.\n"); |
ff741783 | 837 | /* Searching trace events corresponding to a probe event */ |
ddb2f58f | 838 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs); |
ff741783 | 839 | |
9b118aca | 840 | if (ntevs == 0) { /* Not found, retry with an alternative */ |
44225521 | 841 | ret = get_alternative_probe_event(dinfo, pev, &tmp); |
9b118aca | 842 | if (!ret) { |
ddb2f58f | 843 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs); |
9b118aca MH |
844 | /* |
845 | * Write back to the original probe_event for | |
846 | * setting appropriate (user given) event name | |
847 | */ | |
848 | clear_perf_probe_point(&pev->point); | |
849 | memcpy(&pev->point, &tmp, sizeof(tmp)); | |
850 | } | |
851 | } | |
852 | ||
146a1439 | 853 | if (ntevs > 0) { /* Succeeded to find trace events */ |
dfef99cd | 854 | pr_debug("Found %d probe_trace_events.\n", ntevs); |
99e608b5 | 855 | ret = post_process_probe_trace_events(pev, *tevs, ntevs, |
613f050d | 856 | pev->target, pev->uprobes, dinfo); |
5a51fcd1 | 857 | if (ret < 0 || ret == ntevs) { |
613f050d | 858 | pr_debug("Post processing failed or all events are skipped. (%d)\n", ret); |
981d05ad MH |
859 | clear_probe_trace_events(*tevs, ntevs); |
860 | zfree(tevs); | |
613f050d | 861 | ntevs = 0; |
981d05ad | 862 | } |
146a1439 | 863 | } |
4b4da7f7 | 864 | |
613f050d MH |
865 | debuginfo__delete(dinfo); |
866 | ||
146a1439 | 867 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
0687eba7 | 868 | pr_warning("Probe point '%s' not found.\n", |
146a1439 | 869 | synthesize_perf_probe_point(&pev->point)); |
0687eba7 | 870 | return -ENOENT; |
613f050d MH |
871 | } else if (ntevs < 0) { |
872 | /* Error path : ntevs < 0 */ | |
873 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); | |
1c0bd0e8 WN |
874 | if (ntevs == -EBADF) |
875 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
876 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
15eca306 | 877 | if (!need_dwarf) { |
0e43e5d2 | 878 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
879 | return 0; |
880 | } | |
4b4da7f7 | 881 | } |
15eca306 | 882 | return ntevs; |
4b4da7f7 MH |
883 | } |
884 | ||
885 | #define LINEBUF_SIZE 256 | |
886 | #define NR_ADDITIONAL_LINES 2 | |
887 | ||
fde52dbd | 888 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 | 889 | { |
5f03cba4 | 890 | char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE]; |
befe3414 FBH |
891 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
892 | const char *prefix = NULL; | |
4b4da7f7 | 893 | |
befe3414 | 894 | do { |
4b4da7f7 MH |
895 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
896 | goto error; | |
befe3414 FBH |
897 | if (skip) |
898 | continue; | |
899 | if (!prefix) { | |
900 | prefix = show_num ? "%7d " : " "; | |
901 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 902 | } |
befe3414 FBH |
903 | color_fprintf(stdout, color, "%s", buf); |
904 | ||
905 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 906 | |
fde52dbd | 907 | return 1; |
4b4da7f7 | 908 | error: |
fde52dbd | 909 | if (ferror(fp)) { |
5f03cba4 | 910 | pr_warning("File read error: %s\n", |
c8b5f2c9 | 911 | str_error_r(errno, sbuf, sizeof(sbuf))); |
fde52dbd FBH |
912 | return -1; |
913 | } | |
914 | return 0; | |
915 | } | |
146a1439 | 916 | |
fde52dbd FBH |
917 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
918 | { | |
919 | int rv = __show_one_line(fp, l, skip, show_num); | |
920 | if (rv == 0) { | |
921 | pr_warning("Source file is shorter than expected.\n"); | |
922 | rv = -1; | |
923 | } | |
924 | return rv; | |
4b4da7f7 MH |
925 | } |
926 | ||
fde52dbd FBH |
927 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
928 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
929 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
930 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
931 | ||
4b4da7f7 MH |
932 | /* |
933 | * Show line-range always requires debuginfo to find source file and | |
934 | * line number. | |
935 | */ | |
811dd2ae MH |
936 | static int __show_line_range(struct line_range *lr, const char *module, |
937 | bool user) | |
4b4da7f7 | 938 | { |
d3b63d7a | 939 | int l = 1; |
5a62257a | 940 | struct int_node *ln; |
ff741783 | 941 | struct debuginfo *dinfo; |
4b4da7f7 | 942 | FILE *fp; |
ff741783 | 943 | int ret; |
7cf0b79e | 944 | char *tmp; |
5f03cba4 | 945 | char sbuf[STRERR_BUFSIZE]; |
4b4da7f7 MH |
946 | |
947 | /* Search a line range */ | |
92561cb7 MH |
948 | dinfo = open_debuginfo(module, false); |
949 | if (!dinfo) | |
ff741783 | 950 | return -ENOENT; |
146a1439 | 951 | |
ff741783 | 952 | ret = debuginfo__find_line_range(dinfo, lr); |
811dd2ae MH |
953 | if (!ret) { /* Not found, retry with an alternative */ |
954 | ret = get_alternative_line_range(dinfo, lr, module, user); | |
955 | if (!ret) | |
956 | ret = debuginfo__find_line_range(dinfo, lr); | |
957 | } | |
ff741783 | 958 | debuginfo__delete(dinfo); |
5ee05b88 | 959 | if (ret == 0 || ret == -ENOENT) { |
146a1439 MH |
960 | pr_warning("Specified source line is not found.\n"); |
961 | return -ENOENT; | |
962 | } else if (ret < 0) { | |
5ee05b88 | 963 | pr_warning("Debuginfo analysis failed.\n"); |
146a1439 MH |
964 | return ret; |
965 | } | |
4b4da7f7 | 966 | |
7cf0b79e MH |
967 | /* Convert source file path */ |
968 | tmp = lr->path; | |
6a330a3c | 969 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
a78604de HK |
970 | |
971 | /* Free old path when new path is assigned */ | |
972 | if (tmp != lr->path) | |
973 | free(tmp); | |
974 | ||
7cf0b79e | 975 | if (ret < 0) { |
5ee05b88 | 976 | pr_warning("Failed to find source file path.\n"); |
7cf0b79e MH |
977 | return ret; |
978 | } | |
979 | ||
4b4da7f7 MH |
980 | setup_pager(); |
981 | ||
982 | if (lr->function) | |
8737ebde | 983 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
984 | lr->start - lr->offset); |
985 | else | |
62c15fc4 | 986 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
987 | |
988 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
989 | if (fp == NULL) { |
990 | pr_warning("Failed to open %s: %s\n", lr->path, | |
c8b5f2c9 | 991 | str_error_r(errno, sbuf, sizeof(sbuf))); |
146a1439 MH |
992 | return -errno; |
993 | } | |
4b4da7f7 | 994 | /* Skip to starting line number */ |
44b81e92 | 995 | while (l < lr->start) { |
fde52dbd | 996 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
997 | if (ret < 0) |
998 | goto end; | |
999 | } | |
4b4da7f7 | 1000 | |
10daf4d0 | 1001 | intlist__for_each_entry(ln, lr->line_list) { |
5a62257a | 1002 | for (; ln->i > l; l++) { |
fde52dbd | 1003 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
1004 | if (ret < 0) |
1005 | goto end; | |
1006 | } | |
fde52dbd | 1007 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
1008 | if (ret < 0) |
1009 | goto end; | |
4b4da7f7 MH |
1010 | } |
1011 | ||
1012 | if (lr->end == INT_MAX) | |
1013 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
1014 | while (l <= lr->end) { |
1015 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
1016 | if (ret <= 0) | |
44b81e92 FBH |
1017 | break; |
1018 | } | |
146a1439 | 1019 | end: |
4b4da7f7 | 1020 | fclose(fp); |
146a1439 | 1021 | return ret; |
4b4da7f7 MH |
1022 | } |
1023 | ||
2b394bc4 | 1024 | int show_line_range(struct line_range *lr, const char *module, bool user) |
ee45b6c2 MH |
1025 | { |
1026 | int ret; | |
1027 | ||
9bae1e8c | 1028 | ret = init_probe_symbol_maps(user); |
ee45b6c2 MH |
1029 | if (ret < 0) |
1030 | return ret; | |
811dd2ae | 1031 | ret = __show_line_range(lr, module, user); |
9bae1e8c | 1032 | exit_probe_symbol_maps(); |
ee45b6c2 MH |
1033 | |
1034 | return ret; | |
1035 | } | |
1036 | ||
ff741783 MH |
1037 | static int show_available_vars_at(struct debuginfo *dinfo, |
1038 | struct perf_probe_event *pev, | |
ddb2f58f | 1039 | struct strfilter *_filter) |
cf6eb489 MH |
1040 | { |
1041 | char *buf; | |
bd09d7b5 | 1042 | int ret, i, nvars; |
cf6eb489 MH |
1043 | struct str_node *node; |
1044 | struct variable_list *vls = NULL, *vl; | |
9b118aca | 1045 | struct perf_probe_point tmp; |
bd09d7b5 | 1046 | const char *var; |
cf6eb489 MH |
1047 | |
1048 | buf = synthesize_perf_probe_point(&pev->point); | |
1049 | if (!buf) | |
1050 | return -EINVAL; | |
1051 | pr_debug("Searching variables at %s\n", buf); | |
1052 | ||
ddb2f58f | 1053 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls); |
9b118aca | 1054 | if (!ret) { /* Not found, retry with an alternative */ |
44225521 | 1055 | ret = get_alternative_probe_event(dinfo, pev, &tmp); |
9b118aca MH |
1056 | if (!ret) { |
1057 | ret = debuginfo__find_available_vars_at(dinfo, pev, | |
ddb2f58f | 1058 | &vls); |
9b118aca MH |
1059 | /* Release the old probe_point */ |
1060 | clear_perf_probe_point(&tmp); | |
1061 | } | |
1062 | } | |
bd09d7b5 | 1063 | if (ret <= 0) { |
69e96eaa MH |
1064 | if (ret == 0 || ret == -ENOENT) { |
1065 | pr_err("Failed to find the address of %s\n", buf); | |
1066 | ret = -ENOENT; | |
1067 | } else | |
1068 | pr_warning("Debuginfo analysis failed.\n"); | |
bd09d7b5 MH |
1069 | goto end; |
1070 | } | |
69e96eaa | 1071 | |
bd09d7b5 MH |
1072 | /* Some variables are found */ |
1073 | fprintf(stdout, "Available variables at %s\n", buf); | |
1074 | for (i = 0; i < ret; i++) { | |
1075 | vl = &vls[i]; | |
1076 | /* | |
1077 | * A probe point might be converted to | |
1078 | * several trace points. | |
1079 | */ | |
1080 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
1081 | vl->point.offset); | |
74cf249d | 1082 | zfree(&vl->point.symbol); |
bd09d7b5 MH |
1083 | nvars = 0; |
1084 | if (vl->vars) { | |
602a1f4d | 1085 | strlist__for_each_entry(node, vl->vars) { |
bd09d7b5 MH |
1086 | var = strchr(node->s, '\t') + 1; |
1087 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 1088 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
1089 | nvars++; |
1090 | } | |
1091 | } | |
1092 | strlist__delete(vl->vars); | |
cf6eb489 | 1093 | } |
bd09d7b5 MH |
1094 | if (nvars == 0) |
1095 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
1096 | } | |
1097 | free(vls); | |
1098 | end: | |
cf6eb489 MH |
1099 | free(buf); |
1100 | return ret; | |
1101 | } | |
1102 | ||
1103 | /* Show available variables on given probe point */ | |
1104 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
ddb2f58f | 1105 | struct strfilter *_filter) |
cf6eb489 | 1106 | { |
ff741783 MH |
1107 | int i, ret = 0; |
1108 | struct debuginfo *dinfo; | |
cf6eb489 | 1109 | |
9bae1e8c | 1110 | ret = init_probe_symbol_maps(pevs->uprobes); |
cf6eb489 MH |
1111 | if (ret < 0) |
1112 | return ret; | |
1113 | ||
44225521 | 1114 | dinfo = open_debuginfo(pevs->target, false); |
ff741783 | 1115 | if (!dinfo) { |
ee45b6c2 MH |
1116 | ret = -ENOENT; |
1117 | goto out; | |
ff741783 MH |
1118 | } |
1119 | ||
cf6eb489 MH |
1120 | setup_pager(); |
1121 | ||
ff741783 | 1122 | for (i = 0; i < npevs && ret >= 0; i++) |
ddb2f58f | 1123 | ret = show_available_vars_at(dinfo, &pevs[i], _filter); |
ff741783 MH |
1124 | |
1125 | debuginfo__delete(dinfo); | |
ee45b6c2 | 1126 | out: |
9bae1e8c | 1127 | exit_probe_symbol_maps(); |
cf6eb489 MH |
1128 | return ret; |
1129 | } | |
1130 | ||
89fe808a | 1131 | #else /* !HAVE_DWARF_SUPPORT */ |
4b4da7f7 | 1132 | |
7737af01 MH |
1133 | static void debuginfo_cache__exit(void) |
1134 | { | |
1135 | } | |
1136 | ||
5a6f6314 MH |
1137 | static int |
1138 | find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused, | |
1139 | struct perf_probe_point *pp __maybe_unused, | |
1140 | bool is_kprobe __maybe_unused) | |
4b4da7f7 | 1141 | { |
5a6f6314 | 1142 | return -ENOSYS; |
4b4da7f7 MH |
1143 | } |
1144 | ||
0e60836b | 1145 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
ddb2f58f | 1146 | struct probe_trace_event **tevs __maybe_unused) |
4b4da7f7 | 1147 | { |
146a1439 MH |
1148 | if (perf_probe_event_need_dwarf(pev)) { |
1149 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
1150 | return -ENOSYS; | |
1151 | } | |
225466f1 | 1152 | |
4b4da7f7 MH |
1153 | return 0; |
1154 | } | |
1155 | ||
1d037ca1 | 1156 | int show_line_range(struct line_range *lr __maybe_unused, |
2b394bc4 MH |
1157 | const char *module __maybe_unused, |
1158 | bool user __maybe_unused) | |
4b4da7f7 | 1159 | { |
146a1439 MH |
1160 | pr_warning("Debuginfo-analysis is not supported.\n"); |
1161 | return -ENOSYS; | |
4b4da7f7 MH |
1162 | } |
1163 | ||
1d037ca1 | 1164 | int show_available_vars(struct perf_probe_event *pevs __maybe_unused, |
ddb2f58f MH |
1165 | int npevs __maybe_unused, |
1166 | struct strfilter *filter __maybe_unused) | |
cf6eb489 MH |
1167 | { |
1168 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
1169 | return -ENOSYS; | |
1170 | } | |
e0faa8d3 MH |
1171 | #endif |
1172 | ||
e53b00d3 MH |
1173 | void line_range__clear(struct line_range *lr) |
1174 | { | |
e53b00d3 MH |
1175 | free(lr->function); |
1176 | free(lr->file); | |
1177 | free(lr->path); | |
1178 | free(lr->comp_dir); | |
5a62257a | 1179 | intlist__delete(lr->line_list); |
e53b00d3 MH |
1180 | memset(lr, 0, sizeof(*lr)); |
1181 | } | |
1182 | ||
5a62257a | 1183 | int line_range__init(struct line_range *lr) |
e53b00d3 MH |
1184 | { |
1185 | memset(lr, 0, sizeof(*lr)); | |
5a62257a MH |
1186 | lr->line_list = intlist__new(NULL); |
1187 | if (!lr->line_list) | |
1188 | return -ENOMEM; | |
1189 | else | |
1190 | return 0; | |
e53b00d3 MH |
1191 | } |
1192 | ||
21dd9ae5 FBH |
1193 | static int parse_line_num(char **ptr, int *val, const char *what) |
1194 | { | |
1195 | const char *start = *ptr; | |
1196 | ||
1197 | errno = 0; | |
1198 | *val = strtol(*ptr, ptr, 0); | |
1199 | if (errno || *ptr == start) { | |
1200 | semantic_error("'%s' is not a valid number.\n", what); | |
1201 | return -EINVAL; | |
1202 | } | |
1203 | return 0; | |
1204 | } | |
1205 | ||
573709fd MH |
1206 | /* Check the name is good for event, group or function */ |
1207 | static bool is_c_func_name(const char *name) | |
1208 | { | |
1209 | if (!isalpha(*name) && *name != '_') | |
1210 | return false; | |
1211 | while (*++name != '\0') { | |
1212 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
1213 | return false; | |
1214 | } | |
1215 | return true; | |
1216 | } | |
1217 | ||
9d95b580 FBH |
1218 | /* |
1219 | * Stuff 'lr' according to the line range described by 'arg'. | |
1220 | * The line range syntax is described by: | |
1221 | * | |
1222 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 1223 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 1224 | */ |
146a1439 | 1225 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 1226 | { |
e116dfa1 | 1227 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
1228 | int err; |
1229 | ||
1230 | if (!name) | |
1231 | return -ENOMEM; | |
1232 | ||
1233 | lr->start = 0; | |
1234 | lr->end = INT_MAX; | |
1235 | ||
1236 | range = strchr(name, ':'); | |
1237 | if (range) { | |
1238 | *range++ = '\0'; | |
1239 | ||
1240 | err = parse_line_num(&range, &lr->start, "start line"); | |
1241 | if (err) | |
1242 | goto err; | |
1243 | ||
1244 | if (*range == '+' || *range == '-') { | |
1245 | const char c = *range++; | |
1246 | ||
1247 | err = parse_line_num(&range, &lr->end, "end line"); | |
1248 | if (err) | |
1249 | goto err; | |
1250 | ||
1251 | if (c == '+') { | |
1252 | lr->end += lr->start; | |
1253 | /* | |
1254 | * Adjust the number of lines here. | |
1255 | * If the number of lines == 1, the | |
1256 | * the end of line should be equal to | |
1257 | * the start of line. | |
1258 | */ | |
1259 | lr->end--; | |
1260 | } | |
1261 | } | |
9d95b580 | 1262 | |
d3b63d7a | 1263 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
1264 | |
1265 | err = -EINVAL; | |
d3b63d7a | 1266 | if (lr->start > lr->end) { |
631c9def | 1267 | semantic_error("Start line must be smaller" |
146a1439 | 1268 | " than end line.\n"); |
21dd9ae5 | 1269 | goto err; |
146a1439 | 1270 | } |
21dd9ae5 FBH |
1271 | if (*range != '\0') { |
1272 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
1273 | goto err; | |
146a1439 | 1274 | } |
d3b63d7a | 1275 | } |
02b95dad | 1276 | |
e116dfa1 MH |
1277 | file = strchr(name, '@'); |
1278 | if (file) { | |
1279 | *file = '\0'; | |
1280 | lr->file = strdup(++file); | |
1281 | if (lr->file == NULL) { | |
1282 | err = -ENOMEM; | |
1283 | goto err; | |
1284 | } | |
1285 | lr->function = name; | |
573709fd | 1286 | } else if (strchr(name, '/') || strchr(name, '.')) |
21dd9ae5 | 1287 | lr->file = name; |
573709fd | 1288 | else if (is_c_func_name(name))/* We reuse it for checking funcname */ |
21dd9ae5 | 1289 | lr->function = name; |
573709fd MH |
1290 | else { /* Invalid name */ |
1291 | semantic_error("'%s' is not a valid function name.\n", name); | |
1292 | err = -EINVAL; | |
1293 | goto err; | |
1294 | } | |
146a1439 MH |
1295 | |
1296 | return 0; | |
21dd9ae5 FBH |
1297 | err: |
1298 | free(name); | |
1299 | return err; | |
631c9def MH |
1300 | } |
1301 | ||
36a009fe MH |
1302 | static int parse_perf_probe_event_name(char **arg, struct perf_probe_event *pev) |
1303 | { | |
1304 | char *ptr; | |
1305 | ||
1306 | ptr = strchr(*arg, ':'); | |
1307 | if (ptr) { | |
1308 | *ptr = '\0'; | |
42bba263 | 1309 | if (!pev->sdt && !is_c_func_name(*arg)) |
36a009fe MH |
1310 | goto ng_name; |
1311 | pev->group = strdup(*arg); | |
1312 | if (!pev->group) | |
1313 | return -ENOMEM; | |
1314 | *arg = ptr + 1; | |
1315 | } else | |
1316 | pev->group = NULL; | |
42bba263 | 1317 | if (!pev->sdt && !is_c_func_name(*arg)) { |
36a009fe MH |
1318 | ng_name: |
1319 | semantic_error("%s is bad for event name -it must " | |
1320 | "follow C symbol-naming rule.\n", *arg); | |
1321 | return -EINVAL; | |
1322 | } | |
1323 | pev->event = strdup(*arg); | |
1324 | if (pev->event == NULL) | |
1325 | return -ENOMEM; | |
1326 | ||
1327 | return 0; | |
1328 | } | |
1329 | ||
50656eec | 1330 | /* Parse probepoint definition. */ |
146a1439 | 1331 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 1332 | { |
4235b045 | 1333 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
1334 | char *ptr, *tmp; |
1335 | char c, nc = 0; | |
3099c026 | 1336 | bool file_spec = false; |
36a009fe MH |
1337 | int ret; |
1338 | ||
50656eec MH |
1339 | /* |
1340 | * <Syntax> | |
8d993d96 MH |
1341 | * perf probe [GRP:][EVENT=]SRC[:LN|;PTN] |
1342 | * perf probe [GRP:][EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
36a009fe | 1343 | * perf probe %[GRP:]SDT_EVENT |
50656eec | 1344 | */ |
e59d29e8 WN |
1345 | if (!arg) |
1346 | return -EINVAL; | |
50656eec | 1347 | |
af9100ad | 1348 | if (is_sdt_event(arg)) { |
36a009fe | 1349 | pev->sdt = true; |
7e9fca51 MH |
1350 | if (arg[0] == '%') |
1351 | arg++; | |
36a009fe MH |
1352 | } |
1353 | ||
2a9c8c36 | 1354 | ptr = strpbrk(arg, ";=@+%"); |
36a009fe | 1355 | if (pev->sdt) { |
8d993d96 | 1356 | if (ptr) { |
a598180a MH |
1357 | if (*ptr != '@') { |
1358 | semantic_error("%s must be an SDT name.\n", | |
1359 | arg); | |
1360 | return -EINVAL; | |
1361 | } | |
1362 | /* This must be a target file name or build id */ | |
1363 | tmp = build_id_cache__complement(ptr + 1); | |
1364 | if (tmp) { | |
1365 | pev->target = build_id_cache__origname(tmp); | |
1366 | free(tmp); | |
1367 | } else | |
1368 | pev->target = strdup(ptr + 1); | |
1369 | if (!pev->target) | |
1370 | return -ENOMEM; | |
1371 | *ptr = '\0'; | |
146a1439 | 1372 | } |
36a009fe MH |
1373 | ret = parse_perf_probe_event_name(&arg, pev); |
1374 | if (ret == 0) { | |
1375 | if (asprintf(&pev->point.function, "%%%s", pev->event) < 0) | |
1376 | ret = -errno; | |
1377 | } | |
1378 | return ret; | |
1379 | } | |
1380 | ||
1381 | if (ptr && *ptr == '=') { /* Event name */ | |
1382 | *ptr = '\0'; | |
1383 | tmp = ptr + 1; | |
1384 | ret = parse_perf_probe_event_name(&arg, pev); | |
1385 | if (ret < 0) | |
1386 | return ret; | |
1387 | ||
af663d75 MH |
1388 | arg = tmp; |
1389 | } | |
1390 | ||
3099c026 NR |
1391 | /* |
1392 | * Check arg is function or file name and copy it. | |
1393 | * | |
1394 | * We consider arg to be a file spec if and only if it satisfies | |
1395 | * all of the below criteria:: | |
1396 | * - it does not include any of "+@%", | |
1397 | * - it includes one of ":;", and | |
1398 | * - it has a period '.' in the name. | |
1399 | * | |
1400 | * Otherwise, we consider arg to be a function specification. | |
1401 | */ | |
1402 | if (!strpbrk(arg, "+@%") && (ptr = strpbrk(arg, ";:")) != NULL) { | |
1403 | /* This is a file spec if it includes a '.' before ; or : */ | |
1404 | if (memchr(arg, '.', ptr - arg)) | |
1405 | file_spec = true; | |
1406 | } | |
1407 | ||
2a9c8c36 | 1408 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
1409 | if (ptr) { |
1410 | nc = *ptr; | |
1411 | *ptr++ = '\0'; | |
1412 | } | |
1413 | ||
6c6e024f WN |
1414 | if (arg[0] == '\0') |
1415 | tmp = NULL; | |
1416 | else { | |
1417 | tmp = strdup(arg); | |
1418 | if (tmp == NULL) | |
1419 | return -ENOMEM; | |
1420 | } | |
02b95dad | 1421 | |
3099c026 | 1422 | if (file_spec) |
02b95dad | 1423 | pp->file = tmp; |
da15bd9d | 1424 | else { |
02b95dad | 1425 | pp->function = tmp; |
50656eec | 1426 | |
da15bd9d WN |
1427 | /* |
1428 | * Keep pp->function even if this is absolute address, | |
1429 | * so it can mark whether abs_address is valid. | |
1430 | * Which make 'perf probe lib.bin 0x0' possible. | |
1431 | * | |
1432 | * Note that checking length of tmp is not needed | |
1433 | * because when we access tmp[1] we know tmp[0] is '0', | |
1434 | * so tmp[1] should always valid (but could be '\0'). | |
1435 | */ | |
1436 | if (tmp && !strncmp(tmp, "0x", 2)) { | |
1437 | pp->abs_address = strtoul(pp->function, &tmp, 0); | |
1438 | if (*tmp != '\0') { | |
1439 | semantic_error("Invalid absolute address.\n"); | |
1440 | return -EINVAL; | |
1441 | } | |
1442 | } | |
1443 | } | |
1444 | ||
50656eec MH |
1445 | /* Parse other options */ |
1446 | while (ptr) { | |
1447 | arg = ptr; | |
1448 | c = nc; | |
2a9c8c36 | 1449 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
1450 | pp->lazy_line = strdup(arg); |
1451 | if (pp->lazy_line == NULL) | |
1452 | return -ENOMEM; | |
2a9c8c36 MH |
1453 | break; |
1454 | } | |
1455 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
1456 | if (ptr) { |
1457 | nc = *ptr; | |
1458 | *ptr++ = '\0'; | |
1459 | } | |
1460 | switch (c) { | |
1461 | case ':': /* Line number */ | |
1462 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 1463 | if (*tmp != '\0') { |
2a9c8c36 | 1464 | semantic_error("There is non-digit char" |
146a1439 MH |
1465 | " in line number.\n"); |
1466 | return -EINVAL; | |
1467 | } | |
50656eec MH |
1468 | break; |
1469 | case '+': /* Byte offset from a symbol */ | |
1470 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 1471 | if (*tmp != '\0') { |
2a9c8c36 | 1472 | semantic_error("There is non-digit character" |
146a1439 MH |
1473 | " in offset.\n"); |
1474 | return -EINVAL; | |
1475 | } | |
50656eec MH |
1476 | break; |
1477 | case '@': /* File name */ | |
146a1439 MH |
1478 | if (pp->file) { |
1479 | semantic_error("SRC@SRC is not allowed.\n"); | |
1480 | return -EINVAL; | |
1481 | } | |
02b95dad MH |
1482 | pp->file = strdup(arg); |
1483 | if (pp->file == NULL) | |
1484 | return -ENOMEM; | |
50656eec MH |
1485 | break; |
1486 | case '%': /* Probe places */ | |
1487 | if (strcmp(arg, "return") == 0) { | |
1488 | pp->retprobe = 1; | |
146a1439 MH |
1489 | } else { /* Others not supported yet */ |
1490 | semantic_error("%%%s is not supported.\n", arg); | |
1491 | return -ENOTSUP; | |
1492 | } | |
50656eec | 1493 | break; |
146a1439 MH |
1494 | default: /* Buggy case */ |
1495 | pr_err("This program has a bug at %s:%d.\n", | |
1496 | __FILE__, __LINE__); | |
1497 | return -ENOTSUP; | |
50656eec MH |
1498 | break; |
1499 | } | |
1500 | } | |
1501 | ||
1502 | /* Exclusion check */ | |
146a1439 | 1503 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
1504 | semantic_error("Lazy pattern can't be used with" |
1505 | " line number.\n"); | |
146a1439 MH |
1506 | return -EINVAL; |
1507 | } | |
2a9c8c36 | 1508 | |
146a1439 | 1509 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 1510 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
1511 | return -EINVAL; |
1512 | } | |
2a9c8c36 | 1513 | |
146a1439 | 1514 | if (pp->line && pp->offset) { |
0e43e5d2 | 1515 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
1516 | return -EINVAL; |
1517 | } | |
50656eec | 1518 | |
146a1439 | 1519 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 1520 | semantic_error("File always requires line number or " |
0e43e5d2 | 1521 | "lazy pattern.\n"); |
146a1439 MH |
1522 | return -EINVAL; |
1523 | } | |
50656eec | 1524 | |
146a1439 | 1525 | if (pp->offset && !pp->function) { |
0e43e5d2 | 1526 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
1527 | return -EINVAL; |
1528 | } | |
50656eec | 1529 | |
146a1439 | 1530 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 1531 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 1532 | "return probe.\n"); |
146a1439 MH |
1533 | return -EINVAL; |
1534 | } | |
50656eec | 1535 | |
4235b045 | 1536 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
1537 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
1538 | pp->lazy_line); | |
146a1439 | 1539 | return 0; |
50656eec MH |
1540 | } |
1541 | ||
7df2f329 | 1542 | /* Parse perf-probe event argument */ |
146a1439 | 1543 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 1544 | { |
b2a3c12b | 1545 | char *tmp, *goodname; |
7df2f329 MH |
1546 | struct perf_probe_arg_field **fieldp; |
1547 | ||
1548 | pr_debug("parsing arg: %s into ", str); | |
1549 | ||
48481938 MH |
1550 | tmp = strchr(str, '='); |
1551 | if (tmp) { | |
02b95dad MH |
1552 | arg->name = strndup(str, tmp - str); |
1553 | if (arg->name == NULL) | |
1554 | return -ENOMEM; | |
11a1ca35 | 1555 | pr_debug("name:%s ", arg->name); |
48481938 MH |
1556 | str = tmp + 1; |
1557 | } | |
1558 | ||
11a1ca35 MH |
1559 | tmp = strchr(str, ':'); |
1560 | if (tmp) { /* Type setting */ | |
1561 | *tmp = '\0'; | |
02b95dad MH |
1562 | arg->type = strdup(tmp + 1); |
1563 | if (arg->type == NULL) | |
1564 | return -ENOMEM; | |
11a1ca35 MH |
1565 | pr_debug("type:%s ", arg->type); |
1566 | } | |
1567 | ||
b2a3c12b | 1568 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
1569 | if (!is_c_varname(str) || !tmp) { |
1570 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
1571 | arg->var = strdup(str); |
1572 | if (arg->var == NULL) | |
1573 | return -ENOMEM; | |
48481938 | 1574 | pr_debug("%s\n", arg->var); |
146a1439 | 1575 | return 0; |
7df2f329 MH |
1576 | } |
1577 | ||
b2a3c12b | 1578 | /* Structure fields or array element */ |
02b95dad MH |
1579 | arg->var = strndup(str, tmp - str); |
1580 | if (arg->var == NULL) | |
1581 | return -ENOMEM; | |
b2a3c12b | 1582 | goodname = arg->var; |
48481938 | 1583 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
1584 | fieldp = &arg->field; |
1585 | ||
1586 | do { | |
e334016f MH |
1587 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
1588 | if (*fieldp == NULL) | |
1589 | return -ENOMEM; | |
b2a3c12b MH |
1590 | if (*tmp == '[') { /* Array */ |
1591 | str = tmp; | |
1592 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 1593 | (*fieldp)->ref = true; |
b2a3c12b MH |
1594 | if (*tmp != ']' || tmp == str + 1) { |
1595 | semantic_error("Array index must be a" | |
1596 | " number.\n"); | |
1597 | return -EINVAL; | |
1598 | } | |
1599 | tmp++; | |
1600 | if (*tmp == '\0') | |
1601 | tmp = NULL; | |
1602 | } else { /* Structure */ | |
1603 | if (*tmp == '.') { | |
1604 | str = tmp + 1; | |
1605 | (*fieldp)->ref = false; | |
1606 | } else if (tmp[1] == '>') { | |
1607 | str = tmp + 2; | |
1608 | (*fieldp)->ref = true; | |
1609 | } else { | |
1610 | semantic_error("Argument parse error: %s\n", | |
1611 | str); | |
1612 | return -EINVAL; | |
1613 | } | |
1614 | tmp = strpbrk(str, "-.["); | |
146a1439 | 1615 | } |
7df2f329 | 1616 | if (tmp) { |
02b95dad MH |
1617 | (*fieldp)->name = strndup(str, tmp - str); |
1618 | if ((*fieldp)->name == NULL) | |
1619 | return -ENOMEM; | |
b2a3c12b MH |
1620 | if (*str != '[') |
1621 | goodname = (*fieldp)->name; | |
7df2f329 MH |
1622 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
1623 | fieldp = &(*fieldp)->next; | |
1624 | } | |
1625 | } while (tmp); | |
02b95dad MH |
1626 | (*fieldp)->name = strdup(str); |
1627 | if ((*fieldp)->name == NULL) | |
1628 | return -ENOMEM; | |
b2a3c12b MH |
1629 | if (*str != '[') |
1630 | goodname = (*fieldp)->name; | |
7df2f329 | 1631 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 1632 | |
b2a3c12b | 1633 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 1634 | if (!arg->name) { |
b2a3c12b | 1635 | arg->name = strdup(goodname); |
02b95dad MH |
1636 | if (arg->name == NULL) |
1637 | return -ENOMEM; | |
1638 | } | |
146a1439 | 1639 | return 0; |
7df2f329 MH |
1640 | } |
1641 | ||
4235b045 | 1642 | /* Parse perf-probe event command */ |
146a1439 | 1643 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1644 | { |
e1c01d61 | 1645 | char **argv; |
146a1439 | 1646 | int argc, i, ret = 0; |
fac13fd5 | 1647 | |
4235b045 | 1648 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1649 | if (!argv) { |
1650 | pr_debug("Failed to split arguments.\n"); | |
1651 | return -ENOMEM; | |
1652 | } | |
1653 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1654 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1655 | ret = -ERANGE; | |
1656 | goto out; | |
1657 | } | |
50656eec | 1658 | /* Parse probe point */ |
146a1439 MH |
1659 | ret = parse_perf_probe_point(argv[0], pev); |
1660 | if (ret < 0) | |
1661 | goto out; | |
50656eec | 1662 | |
e1c01d61 | 1663 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1664 | pev->nargs = argc - 1; |
e334016f MH |
1665 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1666 | if (pev->args == NULL) { | |
1667 | ret = -ENOMEM; | |
1668 | goto out; | |
1669 | } | |
146a1439 MH |
1670 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1671 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1672 | if (ret >= 0 && | |
1673 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1674 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1675 | " kretprobe.\n"); |
1676 | ret = -EINVAL; | |
1677 | } | |
e1c01d61 | 1678 | } |
146a1439 | 1679 | out: |
e1c01d61 | 1680 | argv_free(argv); |
146a1439 MH |
1681 | |
1682 | return ret; | |
50656eec MH |
1683 | } |
1684 | ||
b3f33f93 RB |
1685 | /* Returns true if *any* ARG is either C variable, $params or $vars. */ |
1686 | bool perf_probe_with_var(struct perf_probe_event *pev) | |
1687 | { | |
1688 | int i = 0; | |
1689 | ||
1690 | for (i = 0; i < pev->nargs; i++) | |
1691 | if (is_c_varname(pev->args[i].var) || | |
1692 | !strcmp(pev->args[i].var, PROBE_ARG_PARAMS) || | |
1693 | !strcmp(pev->args[i].var, PROBE_ARG_VARS)) | |
1694 | return true; | |
1695 | return false; | |
1696 | } | |
1697 | ||
4235b045 MH |
1698 | /* Return true if this perf_probe_event requires debuginfo */ |
1699 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1700 | { | |
4235b045 MH |
1701 | if (pev->point.file || pev->point.line || pev->point.lazy_line) |
1702 | return true; | |
1703 | ||
b3f33f93 RB |
1704 | if (perf_probe_with_var(pev)) |
1705 | return true; | |
4235b045 MH |
1706 | |
1707 | return false; | |
1708 | } | |
1709 | ||
0e60836b | 1710 | /* Parse probe_events event into struct probe_point */ |
92f6c72e | 1711 | int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev) |
4de189fe | 1712 | { |
0e60836b | 1713 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1714 | char pr; |
1715 | char *p; | |
bcbd0040 | 1716 | char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str; |
4de189fe MH |
1717 | int ret, i, argc; |
1718 | char **argv; | |
1719 | ||
0e60836b | 1720 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1721 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1722 | if (!argv) { |
1723 | pr_debug("Failed to split arguments.\n"); | |
1724 | return -ENOMEM; | |
1725 | } | |
1726 | if (argc < 2) { | |
1727 | semantic_error("Too few probe arguments.\n"); | |
1728 | ret = -ERANGE; | |
1729 | goto out; | |
1730 | } | |
4de189fe MH |
1731 | |
1732 | /* Scan event and group name. */ | |
bcbd0040 IT |
1733 | argv0_str = strdup(argv[0]); |
1734 | if (argv0_str == NULL) { | |
1735 | ret = -ENOMEM; | |
1736 | goto out; | |
1737 | } | |
1738 | fmt1_str = strtok_r(argv0_str, ":", &fmt); | |
1739 | fmt2_str = strtok_r(NULL, "/", &fmt); | |
1740 | fmt3_str = strtok_r(NULL, " \t", &fmt); | |
1741 | if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL | |
1742 | || fmt3_str == NULL) { | |
146a1439 MH |
1743 | semantic_error("Failed to parse event name: %s\n", argv[0]); |
1744 | ret = -EINVAL; | |
1745 | goto out; | |
1746 | } | |
bcbd0040 IT |
1747 | pr = fmt1_str[0]; |
1748 | tev->group = strdup(fmt2_str); | |
1749 | tev->event = strdup(fmt3_str); | |
1750 | if (tev->group == NULL || tev->event == NULL) { | |
1751 | ret = -ENOMEM; | |
1752 | goto out; | |
1753 | } | |
4235b045 | 1754 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1755 | |
4235b045 | 1756 | tp->retprobe = (pr == 'r'); |
4de189fe | 1757 | |
190b57fc MH |
1758 | /* Scan module name(if there), function name and offset */ |
1759 | p = strchr(argv[1], ':'); | |
1760 | if (p) { | |
1761 | tp->module = strndup(argv[1], p - argv[1]); | |
844faa4b MH |
1762 | if (!tp->module) { |
1763 | ret = -ENOMEM; | |
1764 | goto out; | |
1765 | } | |
42bba263 | 1766 | tev->uprobes = (tp->module[0] == '/'); |
190b57fc MH |
1767 | p++; |
1768 | } else | |
1769 | p = argv[1]; | |
bcbd0040 | 1770 | fmt1_str = strtok_r(p, "+", &fmt); |
be07afe9 WN |
1771 | /* only the address started with 0x */ |
1772 | if (fmt1_str[0] == '0') { | |
1773 | /* | |
1774 | * Fix a special case: | |
1775 | * if address == 0, kernel reports something like: | |
1776 | * p:probe_libc/abs_0 /lib/libc-2.18.so:0x (null) arg1=%ax | |
1777 | * Newer kernel may fix that, but we want to | |
1778 | * support old kernel also. | |
1779 | */ | |
1780 | if (strcmp(fmt1_str, "0x") == 0) { | |
1781 | if (!argv[2] || strcmp(argv[2], "(null)")) { | |
1782 | ret = -EINVAL; | |
1783 | goto out; | |
1784 | } | |
1785 | tp->address = 0; | |
1786 | ||
1787 | free(argv[2]); | |
1788 | for (i = 2; argv[i + 1] != NULL; i++) | |
1789 | argv[i] = argv[i + 1]; | |
1790 | ||
1791 | argv[i] = NULL; | |
1792 | argc -= 1; | |
1793 | } else | |
1794 | tp->address = strtoul(fmt1_str, NULL, 0); | |
1795 | } else { | |
5a6f6314 MH |
1796 | /* Only the symbol-based probe has offset */ |
1797 | tp->symbol = strdup(fmt1_str); | |
1798 | if (tp->symbol == NULL) { | |
1799 | ret = -ENOMEM; | |
1800 | goto out; | |
1801 | } | |
1802 | fmt2_str = strtok_r(NULL, "", &fmt); | |
1803 | if (fmt2_str == NULL) | |
1804 | tp->offset = 0; | |
1805 | else | |
1806 | tp->offset = strtoul(fmt2_str, NULL, 10); | |
bcbd0040 | 1807 | } |
4de189fe | 1808 | |
4235b045 | 1809 | tev->nargs = argc - 2; |
0e60836b | 1810 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1811 | if (tev->args == NULL) { |
1812 | ret = -ENOMEM; | |
1813 | goto out; | |
1814 | } | |
4235b045 | 1815 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1816 | p = strchr(argv[i + 2], '='); |
1817 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1818 | *p++ = '\0'; |
1819 | else | |
1820 | p = argv[i + 2]; | |
02b95dad | 1821 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1822 | /* TODO: parse regs and offset */ |
02b95dad MH |
1823 | tev->args[i].value = strdup(p); |
1824 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1825 | ret = -ENOMEM; | |
1826 | goto out; | |
1827 | } | |
4de189fe | 1828 | } |
146a1439 MH |
1829 | ret = 0; |
1830 | out: | |
bcbd0040 | 1831 | free(argv0_str); |
4de189fe | 1832 | argv_free(argv); |
146a1439 | 1833 | return ret; |
4de189fe MH |
1834 | } |
1835 | ||
7df2f329 | 1836 | /* Compose only probe arg */ |
909b0360 | 1837 | char *synthesize_perf_probe_arg(struct perf_probe_arg *pa) |
7df2f329 MH |
1838 | { |
1839 | struct perf_probe_arg_field *field = pa->field; | |
909b0360 | 1840 | struct strbuf buf; |
bf4d5f25 MH |
1841 | char *ret = NULL; |
1842 | int err; | |
1843 | ||
1844 | if (strbuf_init(&buf, 64) < 0) | |
1845 | return NULL; | |
7df2f329 | 1846 | |
48481938 | 1847 | if (pa->name && pa->var) |
bf4d5f25 | 1848 | err = strbuf_addf(&buf, "%s=%s", pa->name, pa->var); |
48481938 | 1849 | else |
bf4d5f25 MH |
1850 | err = strbuf_addstr(&buf, pa->name ?: pa->var); |
1851 | if (err) | |
1852 | goto out; | |
7df2f329 MH |
1853 | |
1854 | while (field) { | |
b2a3c12b | 1855 | if (field->name[0] == '[') |
bf4d5f25 | 1856 | err = strbuf_addstr(&buf, field->name); |
b2a3c12b | 1857 | else |
bf4d5f25 MH |
1858 | err = strbuf_addf(&buf, "%s%s", field->ref ? "->" : ".", |
1859 | field->name); | |
7df2f329 | 1860 | field = field->next; |
bf4d5f25 MH |
1861 | if (err) |
1862 | goto out; | |
7df2f329 | 1863 | } |
11a1ca35 | 1864 | |
909b0360 | 1865 | if (pa->type) |
bf4d5f25 MH |
1866 | if (strbuf_addf(&buf, ":%s", pa->type) < 0) |
1867 | goto out; | |
909b0360 MH |
1868 | |
1869 | ret = strbuf_detach(&buf, NULL); | |
bf4d5f25 MH |
1870 | out: |
1871 | strbuf_release(&buf); | |
146a1439 | 1872 | return ret; |
7df2f329 MH |
1873 | } |
1874 | ||
4235b045 | 1875 | /* Compose only probe point (not argument) */ |
c4ff4920 | 1876 | char *synthesize_perf_probe_point(struct perf_probe_point *pp) |
4de189fe | 1877 | { |
909b0360 | 1878 | struct strbuf buf; |
bf4d5f25 MH |
1879 | char *tmp, *ret = NULL; |
1880 | int len, err = 0; | |
1881 | ||
1882 | if (strbuf_init(&buf, 64) < 0) | |
1883 | return NULL; | |
909b0360 | 1884 | |
909b0360 | 1885 | if (pp->function) { |
bf4d5f25 MH |
1886 | if (strbuf_addstr(&buf, pp->function) < 0) |
1887 | goto out; | |
909b0360 | 1888 | if (pp->offset) |
bf4d5f25 | 1889 | err = strbuf_addf(&buf, "+%lu", pp->offset); |
909b0360 | 1890 | else if (pp->line) |
bf4d5f25 | 1891 | err = strbuf_addf(&buf, ":%d", pp->line); |
909b0360 | 1892 | else if (pp->retprobe) |
bf4d5f25 MH |
1893 | err = strbuf_addstr(&buf, "%return"); |
1894 | if (err) | |
1895 | goto out; | |
fb1587d8 MH |
1896 | } |
1897 | if (pp->file) { | |
32ae2ade FBH |
1898 | tmp = pp->file; |
1899 | len = strlen(tmp); | |
1900 | if (len > 30) { | |
1901 | tmp = strchr(pp->file + len - 30, '/'); | |
1902 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1903 | } | |
bf4d5f25 MH |
1904 | err = strbuf_addf(&buf, "@%s", tmp); |
1905 | if (!err && !pp->function && pp->line) | |
1906 | err = strbuf_addf(&buf, ":%d", pp->line); | |
4de189fe | 1907 | } |
bf4d5f25 MH |
1908 | if (!err) |
1909 | ret = strbuf_detach(&buf, NULL); | |
1910 | out: | |
1911 | strbuf_release(&buf); | |
1912 | return ret; | |
7ef17aaf MH |
1913 | } |
1914 | ||
4235b045 | 1915 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) |
7ef17aaf | 1916 | { |
c4ff4920 MH |
1917 | struct strbuf buf; |
1918 | char *tmp, *ret = NULL; | |
1919 | int i; | |
7ef17aaf | 1920 | |
c4ff4920 | 1921 | if (strbuf_init(&buf, 64)) |
4235b045 | 1922 | return NULL; |
c4ff4920 MH |
1923 | if (pev->event) |
1924 | if (strbuf_addf(&buf, "%s:%s=", pev->group ?: PERFPROBE_GROUP, | |
1925 | pev->event) < 0) | |
1926 | goto out; | |
1927 | ||
1928 | tmp = synthesize_perf_probe_point(&pev->point); | |
1929 | if (!tmp || strbuf_addstr(&buf, tmp) < 0) | |
1930 | goto out; | |
1931 | free(tmp); | |
4de189fe | 1932 | |
4235b045 | 1933 | for (i = 0; i < pev->nargs; i++) { |
c4ff4920 MH |
1934 | tmp = synthesize_perf_probe_arg(pev->args + i); |
1935 | if (!tmp || strbuf_addf(&buf, " %s", tmp) < 0) | |
1936 | goto out; | |
1937 | free(tmp); | |
4de189fe | 1938 | } |
4de189fe | 1939 | |
c4ff4920 MH |
1940 | ret = strbuf_detach(&buf, NULL); |
1941 | out: | |
1942 | strbuf_release(&buf); | |
1943 | return ret; | |
4235b045 | 1944 | } |
4235b045 | 1945 | |
0e60836b | 1946 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
909b0360 | 1947 | struct strbuf *buf, int depth) |
4235b045 | 1948 | { |
bf4d5f25 | 1949 | int err; |
4235b045 | 1950 | if (ref->next) { |
0e60836b | 1951 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
909b0360 | 1952 | depth + 1); |
4235b045 | 1953 | if (depth < 0) |
bf4d5f25 | 1954 | return depth; |
4235b045 | 1955 | } |
bf4d5f25 MH |
1956 | err = strbuf_addf(buf, "%+ld(", ref->offset); |
1957 | return (err < 0) ? err : depth; | |
4de189fe MH |
1958 | } |
1959 | ||
0e60836b | 1960 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
909b0360 | 1961 | struct strbuf *buf) |
50656eec | 1962 | { |
0e60836b | 1963 | struct probe_trace_arg_ref *ref = arg->ref; |
bf4d5f25 | 1964 | int depth = 0, err; |
4235b045 MH |
1965 | |
1966 | /* Argument name or separator */ | |
1967 | if (arg->name) | |
bf4d5f25 | 1968 | err = strbuf_addf(buf, " %s=", arg->name); |
4235b045 | 1969 | else |
bf4d5f25 MH |
1970 | err = strbuf_addch(buf, ' '); |
1971 | if (err) | |
1972 | return err; | |
4235b045 | 1973 | |
b7dcb857 MH |
1974 | /* Special case: @XXX */ |
1975 | if (arg->value[0] == '@' && arg->ref) | |
1976 | ref = ref->next; | |
1977 | ||
4235b045 | 1978 | /* Dereferencing arguments */ |
b7dcb857 | 1979 | if (ref) { |
909b0360 | 1980 | depth = __synthesize_probe_trace_arg_ref(ref, buf, 1); |
4235b045 MH |
1981 | if (depth < 0) |
1982 | return depth; | |
1983 | } | |
1984 | ||
1985 | /* Print argument value */ | |
b7dcb857 | 1986 | if (arg->value[0] == '@' && arg->ref) |
bf4d5f25 | 1987 | err = strbuf_addf(buf, "%s%+ld", arg->value, arg->ref->offset); |
b7dcb857 | 1988 | else |
bf4d5f25 | 1989 | err = strbuf_addstr(buf, arg->value); |
4235b045 MH |
1990 | |
1991 | /* Closing */ | |
bf4d5f25 MH |
1992 | while (!err && depth--) |
1993 | err = strbuf_addch(buf, ')'); | |
1994 | ||
4984912e | 1995 | /* Print argument type */ |
bf4d5f25 MH |
1996 | if (!err && arg->type) |
1997 | err = strbuf_addf(buf, ":%s", arg->type); | |
4235b045 | 1998 | |
bf4d5f25 | 1999 | return err; |
4235b045 MH |
2000 | } |
2001 | ||
0e60836b | 2002 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 2003 | { |
0e60836b | 2004 | struct probe_trace_point *tp = &tev->point; |
909b0360 MH |
2005 | struct strbuf buf; |
2006 | char *ret = NULL; | |
bf4d5f25 | 2007 | int i, err; |
eb948e50 | 2008 | |
da15bd9d WN |
2009 | /* Uprobes must have tp->module */ |
2010 | if (tev->uprobes && !tp->module) | |
909b0360 MH |
2011 | return NULL; |
2012 | ||
bf4d5f25 MH |
2013 | if (strbuf_init(&buf, 32) < 0) |
2014 | return NULL; | |
2015 | ||
2016 | if (strbuf_addf(&buf, "%c:%s/%s ", tp->retprobe ? 'r' : 'p', | |
2017 | tev->group, tev->event) < 0) | |
2018 | goto error; | |
da15bd9d WN |
2019 | /* |
2020 | * If tp->address == 0, then this point must be a | |
2021 | * absolute address uprobe. | |
2022 | * try_to_find_absolute_address() should have made | |
2023 | * tp->symbol to "0x0". | |
2024 | */ | |
2025 | if (tev->uprobes && !tp->address) { | |
2026 | if (!tp->symbol || strcmp(tp->symbol, "0x0")) | |
2027 | goto error; | |
2028 | } | |
eb948e50 MH |
2029 | |
2030 | /* Use the tp->address for uprobes */ | |
225466f1 | 2031 | if (tev->uprobes) |
bf4d5f25 | 2032 | err = strbuf_addf(&buf, "%s:0x%lx", tp->module, tp->address); |
da15bd9d WN |
2033 | else if (!strncmp(tp->symbol, "0x", 2)) |
2034 | /* Absolute address. See try_to_find_absolute_address() */ | |
bf4d5f25 MH |
2035 | err = strbuf_addf(&buf, "%s%s0x%lx", tp->module ?: "", |
2036 | tp->module ? ":" : "", tp->address); | |
225466f1 | 2037 | else |
bf4d5f25 MH |
2038 | err = strbuf_addf(&buf, "%s%s%s+%lu", tp->module ?: "", |
2039 | tp->module ? ":" : "", tp->symbol, tp->offset); | |
2040 | if (err) | |
2041 | goto error; | |
50656eec | 2042 | |
909b0360 MH |
2043 | for (i = 0; i < tev->nargs; i++) |
2044 | if (synthesize_probe_trace_arg(&tev->args[i], &buf) < 0) | |
50656eec | 2045 | goto error; |
50656eec | 2046 | |
909b0360 | 2047 | ret = strbuf_detach(&buf, NULL); |
50656eec | 2048 | error: |
909b0360 MH |
2049 | strbuf_release(&buf); |
2050 | return ret; | |
4235b045 | 2051 | } |
50656eec | 2052 | |
5a6f6314 MH |
2053 | static int find_perf_probe_point_from_map(struct probe_trace_point *tp, |
2054 | struct perf_probe_point *pp, | |
2055 | bool is_kprobe) | |
2056 | { | |
2057 | struct symbol *sym = NULL; | |
8a2efd6d | 2058 | struct map *map = NULL; |
e486367f | 2059 | u64 addr = tp->address; |
5a6f6314 MH |
2060 | int ret = -ENOENT; |
2061 | ||
2062 | if (!is_kprobe) { | |
2063 | map = dso__new_map(tp->module); | |
2064 | if (!map) | |
2065 | goto out; | |
be39db9f | 2066 | sym = map__find_symbol(map, addr); |
5a6f6314 | 2067 | } else { |
9b239a12 | 2068 | if (tp->symbol && !addr) { |
0a62f686 MH |
2069 | if (kernel_get_symbol_address_by_name(tp->symbol, |
2070 | &addr, true, false) < 0) | |
9b239a12 MH |
2071 | goto out; |
2072 | } | |
5a6f6314 MH |
2073 | if (addr) { |
2074 | addr += tp->offset; | |
2075 | sym = __find_kernel_function(addr, &map); | |
2076 | } | |
2077 | } | |
98d3b258 | 2078 | |
5a6f6314 MH |
2079 | if (!sym) |
2080 | goto out; | |
2081 | ||
2082 | pp->retprobe = tp->retprobe; | |
2083 | pp->offset = addr - map->unmap_ip(map, sym->start); | |
2084 | pp->function = strdup(sym->name); | |
2085 | ret = pp->function ? 0 : -ENOMEM; | |
2086 | ||
2087 | out: | |
2088 | if (map && !is_kprobe) { | |
84c2cafa | 2089 | map__put(map); |
5a6f6314 MH |
2090 | } |
2091 | ||
2092 | return ret; | |
2093 | } | |
2094 | ||
2095 | static int convert_to_perf_probe_point(struct probe_trace_point *tp, | |
da15bd9d WN |
2096 | struct perf_probe_point *pp, |
2097 | bool is_kprobe) | |
5a6f6314 MH |
2098 | { |
2099 | char buf[128]; | |
2100 | int ret; | |
2101 | ||
2102 | ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe); | |
2103 | if (!ret) | |
2104 | return 0; | |
2105 | ret = find_perf_probe_point_from_map(tp, pp, is_kprobe); | |
2106 | if (!ret) | |
2107 | return 0; | |
2108 | ||
2109 | pr_debug("Failed to find probe point from both of dwarf and map.\n"); | |
2110 | ||
2111 | if (tp->symbol) { | |
2112 | pp->function = strdup(tp->symbol); | |
2113 | pp->offset = tp->offset; | |
614e2fdb | 2114 | } else { |
5a6f6314 MH |
2115 | ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address); |
2116 | if (ret < 0) | |
2117 | return ret; | |
2118 | pp->function = strdup(buf); | |
2119 | pp->offset = 0; | |
2120 | } | |
2121 | if (pp->function == NULL) | |
2122 | return -ENOMEM; | |
2123 | ||
2124 | pp->retprobe = tp->retprobe; | |
2125 | ||
2126 | return 0; | |
2127 | } | |
2128 | ||
0e60836b | 2129 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
225466f1 | 2130 | struct perf_probe_event *pev, bool is_kprobe) |
4235b045 | 2131 | { |
909b0360 | 2132 | struct strbuf buf = STRBUF_INIT; |
146a1439 | 2133 | int i, ret; |
4235b045 | 2134 | |
4b4da7f7 | 2135 | /* Convert event/group name */ |
02b95dad MH |
2136 | pev->event = strdup(tev->event); |
2137 | pev->group = strdup(tev->group); | |
2138 | if (pev->event == NULL || pev->group == NULL) | |
2139 | return -ENOMEM; | |
fb1587d8 | 2140 | |
4b4da7f7 | 2141 | /* Convert trace_point to probe_point */ |
5a6f6314 | 2142 | ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe); |
146a1439 MH |
2143 | if (ret < 0) |
2144 | return ret; | |
4b4da7f7 | 2145 | |
4235b045 MH |
2146 | /* Convert trace_arg to probe_arg */ |
2147 | pev->nargs = tev->nargs; | |
e334016f MH |
2148 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
2149 | if (pev->args == NULL) | |
2150 | return -ENOMEM; | |
02b95dad | 2151 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 2152 | if (tev->args[i].name) |
02b95dad | 2153 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 2154 | else { |
bf4d5f25 MH |
2155 | if ((ret = strbuf_init(&buf, 32)) < 0) |
2156 | goto error; | |
909b0360 MH |
2157 | ret = synthesize_probe_trace_arg(&tev->args[i], &buf); |
2158 | pev->args[i].name = strbuf_detach(&buf, NULL); | |
4235b045 | 2159 | } |
02b95dad MH |
2160 | if (pev->args[i].name == NULL && ret >= 0) |
2161 | ret = -ENOMEM; | |
2162 | } | |
bf4d5f25 | 2163 | error: |
146a1439 MH |
2164 | if (ret < 0) |
2165 | clear_perf_probe_event(pev); | |
2166 | ||
2167 | return ret; | |
4235b045 MH |
2168 | } |
2169 | ||
2170 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
2171 | { | |
7df2f329 | 2172 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
2173 | int i; |
2174 | ||
f5385650 ACM |
2175 | free(pev->event); |
2176 | free(pev->group); | |
7afb3fab | 2177 | free(pev->target); |
9b118aca | 2178 | clear_perf_probe_point(&pev->point); |
f5385650 | 2179 | |
7df2f329 | 2180 | for (i = 0; i < pev->nargs; i++) { |
f5385650 ACM |
2181 | free(pev->args[i].name); |
2182 | free(pev->args[i].var); | |
2183 | free(pev->args[i].type); | |
7df2f329 MH |
2184 | field = pev->args[i].field; |
2185 | while (field) { | |
2186 | next = field->next; | |
74cf249d | 2187 | zfree(&field->name); |
7df2f329 MH |
2188 | free(field); |
2189 | field = next; | |
2190 | } | |
2191 | } | |
f5385650 | 2192 | free(pev->args); |
4235b045 MH |
2193 | memset(pev, 0, sizeof(*pev)); |
2194 | } | |
2195 | ||
0542bb9c MH |
2196 | #define strdup_or_goto(str, label) \ |
2197 | ({ char *__p = NULL; if (str && !(__p = strdup(str))) goto label; __p; }) | |
2198 | ||
2199 | static int perf_probe_point__copy(struct perf_probe_point *dst, | |
2200 | struct perf_probe_point *src) | |
2201 | { | |
2202 | dst->file = strdup_or_goto(src->file, out_err); | |
2203 | dst->function = strdup_or_goto(src->function, out_err); | |
2204 | dst->lazy_line = strdup_or_goto(src->lazy_line, out_err); | |
2205 | dst->line = src->line; | |
2206 | dst->retprobe = src->retprobe; | |
2207 | dst->offset = src->offset; | |
2208 | return 0; | |
2209 | ||
2210 | out_err: | |
2211 | clear_perf_probe_point(dst); | |
2212 | return -ENOMEM; | |
2213 | } | |
2214 | ||
2215 | static int perf_probe_arg__copy(struct perf_probe_arg *dst, | |
2216 | struct perf_probe_arg *src) | |
2217 | { | |
2218 | struct perf_probe_arg_field *field, **ppfield; | |
2219 | ||
2220 | dst->name = strdup_or_goto(src->name, out_err); | |
2221 | dst->var = strdup_or_goto(src->var, out_err); | |
2222 | dst->type = strdup_or_goto(src->type, out_err); | |
2223 | ||
2224 | field = src->field; | |
2225 | ppfield = &(dst->field); | |
2226 | while (field) { | |
2227 | *ppfield = zalloc(sizeof(*field)); | |
2228 | if (!*ppfield) | |
2229 | goto out_err; | |
2230 | (*ppfield)->name = strdup_or_goto(field->name, out_err); | |
2231 | (*ppfield)->index = field->index; | |
2232 | (*ppfield)->ref = field->ref; | |
2233 | field = field->next; | |
2234 | ppfield = &((*ppfield)->next); | |
2235 | } | |
2236 | return 0; | |
2237 | out_err: | |
2238 | return -ENOMEM; | |
2239 | } | |
2240 | ||
2241 | int perf_probe_event__copy(struct perf_probe_event *dst, | |
2242 | struct perf_probe_event *src) | |
2243 | { | |
2244 | int i; | |
2245 | ||
2246 | dst->event = strdup_or_goto(src->event, out_err); | |
2247 | dst->group = strdup_or_goto(src->group, out_err); | |
2248 | dst->target = strdup_or_goto(src->target, out_err); | |
2249 | dst->uprobes = src->uprobes; | |
2250 | ||
2251 | if (perf_probe_point__copy(&dst->point, &src->point) < 0) | |
2252 | goto out_err; | |
2253 | ||
2254 | dst->args = zalloc(sizeof(struct perf_probe_arg) * src->nargs); | |
2255 | if (!dst->args) | |
2256 | goto out_err; | |
2257 | dst->nargs = src->nargs; | |
2258 | ||
2259 | for (i = 0; i < src->nargs; i++) | |
2260 | if (perf_probe_arg__copy(&dst->args[i], &src->args[i]) < 0) | |
2261 | goto out_err; | |
2262 | return 0; | |
2263 | ||
2264 | out_err: | |
2265 | clear_perf_probe_event(dst); | |
2266 | return -ENOMEM; | |
2267 | } | |
2268 | ||
92f6c72e | 2269 | void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 2270 | { |
0e60836b | 2271 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
2272 | int i; |
2273 | ||
f5385650 ACM |
2274 | free(tev->event); |
2275 | free(tev->group); | |
2276 | free(tev->point.symbol); | |
4c859351 | 2277 | free(tev->point.realname); |
f5385650 | 2278 | free(tev->point.module); |
4235b045 | 2279 | for (i = 0; i < tev->nargs; i++) { |
f5385650 ACM |
2280 | free(tev->args[i].name); |
2281 | free(tev->args[i].value); | |
2282 | free(tev->args[i].type); | |
4235b045 MH |
2283 | ref = tev->args[i].ref; |
2284 | while (ref) { | |
2285 | next = ref->next; | |
2286 | free(ref); | |
2287 | ref = next; | |
2288 | } | |
2289 | } | |
f5385650 | 2290 | free(tev->args); |
4235b045 | 2291 | memset(tev, 0, sizeof(*tev)); |
50656eec MH |
2292 | } |
2293 | ||
9aaf5a5f MH |
2294 | struct kprobe_blacklist_node { |
2295 | struct list_head list; | |
2296 | unsigned long start; | |
2297 | unsigned long end; | |
2298 | char *symbol; | |
2299 | }; | |
2300 | ||
2301 | static void kprobe_blacklist__delete(struct list_head *blacklist) | |
2302 | { | |
2303 | struct kprobe_blacklist_node *node; | |
2304 | ||
2305 | while (!list_empty(blacklist)) { | |
2306 | node = list_first_entry(blacklist, | |
2307 | struct kprobe_blacklist_node, list); | |
2308 | list_del(&node->list); | |
2309 | free(node->symbol); | |
2310 | free(node); | |
2311 | } | |
2312 | } | |
2313 | ||
2314 | static int kprobe_blacklist__load(struct list_head *blacklist) | |
2315 | { | |
2316 | struct kprobe_blacklist_node *node; | |
4605eab3 | 2317 | const char *__debugfs = debugfs__mountpoint(); |
9aaf5a5f MH |
2318 | char buf[PATH_MAX], *p; |
2319 | FILE *fp; | |
2320 | int ret; | |
2321 | ||
2322 | if (__debugfs == NULL) | |
2323 | return -ENOTSUP; | |
2324 | ||
2325 | ret = e_snprintf(buf, PATH_MAX, "%s/kprobes/blacklist", __debugfs); | |
2326 | if (ret < 0) | |
2327 | return ret; | |
2328 | ||
2329 | fp = fopen(buf, "r"); | |
2330 | if (!fp) | |
2331 | return -errno; | |
2332 | ||
2333 | ret = 0; | |
2334 | while (fgets(buf, PATH_MAX, fp)) { | |
2335 | node = zalloc(sizeof(*node)); | |
2336 | if (!node) { | |
2337 | ret = -ENOMEM; | |
2338 | break; | |
2339 | } | |
2340 | INIT_LIST_HEAD(&node->list); | |
2341 | list_add_tail(&node->list, blacklist); | |
2342 | if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) { | |
2343 | ret = -EINVAL; | |
2344 | break; | |
2345 | } | |
2346 | p = strchr(buf, '\t'); | |
2347 | if (p) { | |
2348 | p++; | |
2349 | if (p[strlen(p) - 1] == '\n') | |
2350 | p[strlen(p) - 1] = '\0'; | |
2351 | } else | |
2352 | p = (char *)"unknown"; | |
2353 | node->symbol = strdup(p); | |
2354 | if (!node->symbol) { | |
2355 | ret = -ENOMEM; | |
2356 | break; | |
2357 | } | |
2358 | pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n", | |
2359 | node->start, node->end, node->symbol); | |
2360 | ret++; | |
2361 | } | |
2362 | if (ret < 0) | |
2363 | kprobe_blacklist__delete(blacklist); | |
2364 | fclose(fp); | |
2365 | ||
2366 | return ret; | |
2367 | } | |
2368 | ||
2369 | static struct kprobe_blacklist_node * | |
2370 | kprobe_blacklist__find_by_address(struct list_head *blacklist, | |
2371 | unsigned long address) | |
2372 | { | |
2373 | struct kprobe_blacklist_node *node; | |
2374 | ||
2375 | list_for_each_entry(node, blacklist, list) { | |
2376 | if (node->start <= address && address <= node->end) | |
2377 | return node; | |
2378 | } | |
2379 | ||
2380 | return NULL; | |
2381 | } | |
2382 | ||
b031220d MH |
2383 | static LIST_HEAD(kprobe_blacklist); |
2384 | ||
2385 | static void kprobe_blacklist__init(void) | |
2386 | { | |
2387 | if (!list_empty(&kprobe_blacklist)) | |
2388 | return; | |
2389 | ||
2390 | if (kprobe_blacklist__load(&kprobe_blacklist) < 0) | |
2391 | pr_debug("No kprobe blacklist support, ignored\n"); | |
2392 | } | |
2393 | ||
2394 | static void kprobe_blacklist__release(void) | |
2395 | { | |
2396 | kprobe_blacklist__delete(&kprobe_blacklist); | |
2397 | } | |
2398 | ||
2399 | static bool kprobe_blacklist__listed(unsigned long address) | |
2400 | { | |
2401 | return !!kprobe_blacklist__find_by_address(&kprobe_blacklist, address); | |
2402 | } | |
2403 | ||
d350bd57 MH |
2404 | static int perf_probe_event__sprintf(const char *group, const char *event, |
2405 | struct perf_probe_event *pev, | |
ba7ecb02 MH |
2406 | const char *module, |
2407 | struct strbuf *result) | |
278498d4 | 2408 | { |
bf4d5f25 | 2409 | int i, ret; |
909b0360 | 2410 | char *buf; |
278498d4 | 2411 | |
909b0360 MH |
2412 | if (asprintf(&buf, "%s:%s", group, event) < 0) |
2413 | return -errno; | |
bf4d5f25 | 2414 | ret = strbuf_addf(result, " %-20s (on ", buf); |
909b0360 | 2415 | free(buf); |
bf4d5f25 MH |
2416 | if (ret) |
2417 | return ret; | |
4235b045 | 2418 | |
909b0360 MH |
2419 | /* Synthesize only event probe point */ |
2420 | buf = synthesize_perf_probe_point(&pev->point); | |
2421 | if (!buf) | |
2422 | return -ENOMEM; | |
bf4d5f25 | 2423 | ret = strbuf_addstr(result, buf); |
909b0360 | 2424 | free(buf); |
146a1439 | 2425 | |
bf4d5f25 MH |
2426 | if (!ret && module) |
2427 | ret = strbuf_addf(result, " in %s", module); | |
278498d4 | 2428 | |
bf4d5f25 MH |
2429 | if (!ret && pev->nargs > 0) { |
2430 | ret = strbuf_add(result, " with", 5); | |
2431 | for (i = 0; !ret && i < pev->nargs; i++) { | |
909b0360 MH |
2432 | buf = synthesize_perf_probe_arg(&pev->args[i]); |
2433 | if (!buf) | |
2434 | return -ENOMEM; | |
bf4d5f25 | 2435 | ret = strbuf_addf(result, " %s", buf); |
909b0360 | 2436 | free(buf); |
7df2f329 | 2437 | } |
278498d4 | 2438 | } |
bf4d5f25 MH |
2439 | if (!ret) |
2440 | ret = strbuf_addch(result, ')'); | |
909b0360 | 2441 | |
bf4d5f25 | 2442 | return ret; |
278498d4 MH |
2443 | } |
2444 | ||
ba7ecb02 | 2445 | /* Show an event */ |
b02137cc NK |
2446 | int show_perf_probe_event(const char *group, const char *event, |
2447 | struct perf_probe_event *pev, | |
2448 | const char *module, bool use_stdout) | |
ba7ecb02 MH |
2449 | { |
2450 | struct strbuf buf = STRBUF_INIT; | |
2451 | int ret; | |
2452 | ||
d350bd57 | 2453 | ret = perf_probe_event__sprintf(group, event, pev, module, &buf); |
ba7ecb02 MH |
2454 | if (ret >= 0) { |
2455 | if (use_stdout) | |
2456 | printf("%s\n", buf.buf); | |
2457 | else | |
2458 | pr_info("%s\n", buf.buf); | |
2459 | } | |
2460 | strbuf_release(&buf); | |
2461 | ||
2462 | return ret; | |
2463 | } | |
2464 | ||
b6a89643 MH |
2465 | static bool filter_probe_trace_event(struct probe_trace_event *tev, |
2466 | struct strfilter *filter) | |
2467 | { | |
2468 | char tmp[128]; | |
2469 | ||
2470 | /* At first, check the event name itself */ | |
2471 | if (strfilter__compare(filter, tev->event)) | |
2472 | return true; | |
2473 | ||
2474 | /* Next, check the combination of name and group */ | |
2475 | if (e_snprintf(tmp, 128, "%s:%s", tev->group, tev->event) < 0) | |
2476 | return false; | |
2477 | return strfilter__compare(filter, tmp); | |
2478 | } | |
2479 | ||
2480 | static int __show_perf_probe_events(int fd, bool is_kprobe, | |
2481 | struct strfilter *filter) | |
4de189fe | 2482 | { |
225466f1 | 2483 | int ret = 0; |
0e60836b | 2484 | struct probe_trace_event tev; |
4235b045 | 2485 | struct perf_probe_event pev; |
4de189fe MH |
2486 | struct strlist *rawlist; |
2487 | struct str_node *ent; | |
2488 | ||
4235b045 MH |
2489 | memset(&tev, 0, sizeof(tev)); |
2490 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 2491 | |
92f6c72e | 2492 | rawlist = probe_file__get_rawlist(fd); |
146a1439 | 2493 | if (!rawlist) |
6eb08660 | 2494 | return -ENOMEM; |
4de189fe | 2495 | |
602a1f4d | 2496 | strlist__for_each_entry(ent, rawlist) { |
0e60836b | 2497 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 | 2498 | if (ret >= 0) { |
b6a89643 MH |
2499 | if (!filter_probe_trace_event(&tev, filter)) |
2500 | goto next; | |
225466f1 SD |
2501 | ret = convert_to_perf_probe_event(&tev, &pev, |
2502 | is_kprobe); | |
ba7ecb02 MH |
2503 | if (ret < 0) |
2504 | goto next; | |
d350bd57 MH |
2505 | ret = show_perf_probe_event(pev.group, pev.event, |
2506 | &pev, tev.point.module, | |
ba7ecb02 | 2507 | true); |
146a1439 | 2508 | } |
b6a89643 | 2509 | next: |
4235b045 | 2510 | clear_perf_probe_event(&pev); |
0e60836b | 2511 | clear_probe_trace_event(&tev); |
146a1439 MH |
2512 | if (ret < 0) |
2513 | break; | |
4de189fe | 2514 | } |
4de189fe | 2515 | strlist__delete(rawlist); |
7737af01 MH |
2516 | /* Cleanup cached debuginfo if needed */ |
2517 | debuginfo_cache__exit(); | |
146a1439 MH |
2518 | |
2519 | return ret; | |
4de189fe MH |
2520 | } |
2521 | ||
225466f1 | 2522 | /* List up current perf-probe events */ |
b6a89643 | 2523 | int show_perf_probe_events(struct strfilter *filter) |
225466f1 | 2524 | { |
5e45187c | 2525 | int kp_fd, up_fd, ret; |
225466f1 SD |
2526 | |
2527 | setup_pager(); | |
225466f1 | 2528 | |
1f3736c9 MH |
2529 | if (probe_conf.cache) |
2530 | return probe_cache__show_all_caches(filter); | |
2531 | ||
9bae1e8c | 2532 | ret = init_probe_symbol_maps(false); |
225466f1 SD |
2533 | if (ret < 0) |
2534 | return ret; | |
2535 | ||
92f6c72e MH |
2536 | ret = probe_file__open_both(&kp_fd, &up_fd, 0); |
2537 | if (ret < 0) | |
2538 | return ret; | |
225466f1 | 2539 | |
92f6c72e MH |
2540 | if (kp_fd >= 0) |
2541 | ret = __show_perf_probe_events(kp_fd, true, filter); | |
2542 | if (up_fd >= 0 && ret >= 0) | |
b6a89643 | 2543 | ret = __show_perf_probe_events(up_fd, false, filter); |
92f6c72e MH |
2544 | if (kp_fd > 0) |
2545 | close(kp_fd); | |
2546 | if (up_fd > 0) | |
5e45187c | 2547 | close(up_fd); |
9bae1e8c | 2548 | exit_probe_symbol_maps(); |
225466f1 | 2549 | |
146a1439 | 2550 | return ret; |
50656eec MH |
2551 | } |
2552 | ||
146a1439 MH |
2553 | static int get_new_event_name(char *buf, size_t len, const char *base, |
2554 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
2555 | { |
2556 | int i, ret; | |
663b1151 | 2557 | char *p, *nbase; |
17f88fcd | 2558 | |
3099c026 NR |
2559 | if (*base == '.') |
2560 | base++; | |
663b1151 MH |
2561 | nbase = strdup(base); |
2562 | if (!nbase) | |
2563 | return -ENOMEM; | |
2564 | ||
2565 | /* Cut off the dot suffixes (e.g. .const, .isra)*/ | |
2566 | p = strchr(nbase, '.'); | |
2567 | if (p && p != nbase) | |
2568 | *p = '\0'; | |
3099c026 | 2569 | |
663b1151 MH |
2570 | /* Try no suffix number */ |
2571 | ret = e_snprintf(buf, len, "%s", nbase); | |
146a1439 | 2572 | if (ret < 0) { |
5f03cba4 | 2573 | pr_debug("snprintf() failed: %d\n", ret); |
663b1151 | 2574 | goto out; |
146a1439 | 2575 | } |
17f88fcd | 2576 | if (!strlist__has_entry(namelist, buf)) |
663b1151 | 2577 | goto out; |
17f88fcd | 2578 | |
d761b08b | 2579 | if (!allow_suffix) { |
03e01f56 WN |
2580 | pr_warning("Error: event \"%s\" already exists.\n" |
2581 | " Hint: Remove existing event by 'perf probe -d'\n" | |
2582 | " or force duplicates by 'perf probe -f'\n" | |
2583 | " or set 'force=yes' in BPF source.\n", | |
2584 | buf); | |
663b1151 MH |
2585 | ret = -EEXIST; |
2586 | goto out; | |
d761b08b MH |
2587 | } |
2588 | ||
17f88fcd MH |
2589 | /* Try to add suffix */ |
2590 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
663b1151 | 2591 | ret = e_snprintf(buf, len, "%s_%d", nbase, i); |
146a1439 | 2592 | if (ret < 0) { |
5f03cba4 | 2593 | pr_debug("snprintf() failed: %d\n", ret); |
663b1151 | 2594 | goto out; |
146a1439 | 2595 | } |
b498ce1f MH |
2596 | if (!strlist__has_entry(namelist, buf)) |
2597 | break; | |
2598 | } | |
146a1439 MH |
2599 | if (i == MAX_EVENT_INDEX) { |
2600 | pr_warning("Too many events are on the same function.\n"); | |
2601 | ret = -ERANGE; | |
2602 | } | |
2603 | ||
663b1151 MH |
2604 | out: |
2605 | free(nbase); | |
146a1439 | 2606 | return ret; |
b498ce1f MH |
2607 | } |
2608 | ||
79702f61 MH |
2609 | /* Warn if the current kernel's uprobe implementation is old */ |
2610 | static void warn_uprobe_event_compat(struct probe_trace_event *tev) | |
2611 | { | |
2612 | int i; | |
2613 | char *buf = synthesize_probe_trace_command(tev); | |
2614 | ||
2615 | /* Old uprobe event doesn't support memory dereference */ | |
2616 | if (!tev->uprobes || tev->nargs == 0 || !buf) | |
2617 | goto out; | |
2618 | ||
2619 | for (i = 0; i < tev->nargs; i++) | |
2620 | if (strglobmatch(tev->args[i].value, "[$@+-]*")) { | |
2621 | pr_warning("Please upgrade your kernel to at least " | |
2622 | "3.14 to have access to feature %s\n", | |
2623 | tev->args[i].value); | |
2624 | break; | |
2625 | } | |
2626 | out: | |
2627 | free(buf); | |
2628 | } | |
2629 | ||
a3c9de62 MH |
2630 | /* Set new name from original perf_probe_event and namelist */ |
2631 | static int probe_trace_event__set_name(struct probe_trace_event *tev, | |
2632 | struct perf_probe_event *pev, | |
2633 | struct strlist *namelist, | |
2634 | bool allow_suffix) | |
2635 | { | |
2636 | const char *event, *group; | |
2637 | char buf[64]; | |
2638 | int ret; | |
2639 | ||
bc062230 | 2640 | /* If probe_event or trace_event already have the name, reuse it */ |
42bba263 | 2641 | if (pev->event && !pev->sdt) |
a3c9de62 | 2642 | event = pev->event; |
bc062230 MH |
2643 | else if (tev->event) |
2644 | event = tev->event; | |
2645 | else { | |
2646 | /* Or generate new one from probe point */ | |
da15bd9d WN |
2647 | if (pev->point.function && |
2648 | (strncmp(pev->point.function, "0x", 2) != 0) && | |
2649 | !strisglob(pev->point.function)) | |
a3c9de62 MH |
2650 | event = pev->point.function; |
2651 | else | |
2652 | event = tev->point.realname; | |
bc062230 | 2653 | } |
42bba263 | 2654 | if (pev->group && !pev->sdt) |
a3c9de62 | 2655 | group = pev->group; |
bc062230 MH |
2656 | else if (tev->group) |
2657 | group = tev->group; | |
a3c9de62 MH |
2658 | else |
2659 | group = PERFPROBE_GROUP; | |
2660 | ||
2661 | /* Get an unused new event name */ | |
2662 | ret = get_new_event_name(buf, 64, event, | |
2663 | namelist, allow_suffix); | |
2664 | if (ret < 0) | |
2665 | return ret; | |
2666 | ||
2667 | event = buf; | |
2668 | ||
2669 | tev->event = strdup(event); | |
2670 | tev->group = strdup(group); | |
2671 | if (tev->event == NULL || tev->group == NULL) | |
2672 | return -ENOMEM; | |
2673 | ||
2674 | /* Add added event name to namelist */ | |
2675 | strlist__add(namelist, event); | |
2676 | return 0; | |
2677 | } | |
2678 | ||
1de7b8bf MH |
2679 | static int __open_probe_file_and_namelist(bool uprobe, |
2680 | struct strlist **namelist) | |
50656eec | 2681 | { |
1de7b8bf | 2682 | int fd; |
50656eec | 2683 | |
1de7b8bf | 2684 | fd = probe_file__open(PF_FL_RW | (uprobe ? PF_FL_UPROBE : 0)); |
92f6c72e | 2685 | if (fd < 0) |
146a1439 | 2686 | return fd; |
5e45187c | 2687 | |
b498ce1f | 2688 | /* Get current event names */ |
1de7b8bf MH |
2689 | *namelist = probe_file__get_namelist(fd); |
2690 | if (!(*namelist)) { | |
146a1439 | 2691 | pr_debug("Failed to get current event list.\n"); |
1de7b8bf MH |
2692 | close(fd); |
2693 | return -ENOMEM; | |
146a1439 | 2694 | } |
1de7b8bf MH |
2695 | return fd; |
2696 | } | |
2697 | ||
2698 | static int __add_probe_trace_events(struct perf_probe_event *pev, | |
2699 | struct probe_trace_event *tevs, | |
2700 | int ntevs, bool allow_suffix) | |
2701 | { | |
2702 | int i, fd[2] = {-1, -1}, up, ret; | |
2703 | struct probe_trace_event *tev = NULL; | |
2704 | struct probe_cache *cache = NULL; | |
2705 | struct strlist *namelist[2] = {NULL, NULL}; | |
2706 | ||
2707 | up = pev->uprobes ? 1 : 0; | |
2708 | fd[up] = __open_probe_file_and_namelist(up, &namelist[up]); | |
2709 | if (fd[up] < 0) | |
2710 | return fd[up]; | |
4235b045 | 2711 | |
146a1439 | 2712 | ret = 0; |
02b95dad | 2713 | for (i = 0; i < ntevs; i++) { |
4235b045 | 2714 | tev = &tevs[i]; |
1de7b8bf MH |
2715 | up = tev->uprobes ? 1 : 0; |
2716 | if (fd[up] == -1) { /* Open the kprobe/uprobe_events */ | |
2717 | fd[up] = __open_probe_file_and_namelist(up, | |
2718 | &namelist[up]); | |
2719 | if (fd[up] < 0) | |
2720 | goto close_out; | |
2721 | } | |
b031220d | 2722 | /* Skip if the symbol is out of .text or blacklisted */ |
bc062230 | 2723 | if (!tev->point.symbol && !pev->uprobes) |
5a51fcd1 | 2724 | continue; |
9aaf5a5f | 2725 | |
a3c9de62 | 2726 | /* Set new name for tev (and update namelist) */ |
1de7b8bf | 2727 | ret = probe_trace_event__set_name(tev, pev, namelist[up], |
a3c9de62 | 2728 | allow_suffix); |
146a1439 MH |
2729 | if (ret < 0) |
2730 | break; | |
4235b045 | 2731 | |
1de7b8bf | 2732 | ret = probe_file__add_event(fd[up], tev); |
146a1439 MH |
2733 | if (ret < 0) |
2734 | break; | |
4235b045 | 2735 | |
4235b045 MH |
2736 | /* |
2737 | * Probes after the first probe which comes from same | |
2738 | * user input are always allowed to add suffix, because | |
2739 | * there might be several addresses corresponding to | |
2740 | * one code line. | |
2741 | */ | |
2742 | allow_suffix = true; | |
50656eec | 2743 | } |
79702f61 MH |
2744 | if (ret == -EINVAL && pev->uprobes) |
2745 | warn_uprobe_event_compat(tev); | |
2fd457a3 MH |
2746 | if (ret == 0 && probe_conf.cache) { |
2747 | cache = probe_cache__new(pev->target); | |
2748 | if (!cache || | |
2749 | probe_cache__add_entry(cache, pev, tevs, ntevs) < 0 || | |
2750 | probe_cache__commit(cache) < 0) | |
2751 | pr_warning("Failed to add event to probe cache\n"); | |
2752 | probe_cache__delete(cache); | |
2753 | } | |
146a1439 | 2754 | |
ae2cb1ac | 2755 | close_out: |
1de7b8bf MH |
2756 | for (up = 0; up < 2; up++) { |
2757 | strlist__delete(namelist[up]); | |
2758 | if (fd[up] >= 0) | |
2759 | close(fd[up]); | |
2760 | } | |
146a1439 | 2761 | return ret; |
50656eec | 2762 | } |
fa28244d | 2763 | |
6bb536cc WN |
2764 | static int find_probe_functions(struct map *map, char *name, |
2765 | struct symbol **syms) | |
eb948e50 | 2766 | { |
564c62a4 | 2767 | int found = 0; |
0a3873a8 | 2768 | struct symbol *sym; |
4c859351 | 2769 | struct rb_node *tmp; |
564c62a4 | 2770 | |
be39db9f | 2771 | if (map__load(map) < 0) |
75e4a2a6 WN |
2772 | return 0; |
2773 | ||
4c859351 | 2774 | map__for_each_symbol(map, sym, tmp) { |
6bb536cc | 2775 | if (strglobmatch(sym->name, name)) { |
4c859351 | 2776 | found++; |
6bb536cc WN |
2777 | if (syms && found < probe_conf.max_probes) |
2778 | syms[found - 1] = sym; | |
2779 | } | |
eb948e50 | 2780 | } |
564c62a4 NK |
2781 | |
2782 | return found; | |
eb948e50 MH |
2783 | } |
2784 | ||
7b6ff0bd NR |
2785 | void __weak arch__fix_tev_from_maps(struct perf_probe_event *pev __maybe_unused, |
2786 | struct probe_trace_event *tev __maybe_unused, | |
0b3c2264 NR |
2787 | struct map *map __maybe_unused, |
2788 | struct symbol *sym __maybe_unused) { } | |
7b6ff0bd | 2789 | |
eb948e50 MH |
2790 | /* |
2791 | * Find probe function addresses from map. | |
2792 | * Return an error or the number of found probe_trace_event | |
2793 | */ | |
2794 | static int find_probe_trace_events_from_map(struct perf_probe_event *pev, | |
ddb2f58f | 2795 | struct probe_trace_event **tevs) |
e0faa8d3 | 2796 | { |
eb948e50 | 2797 | struct map *map = NULL; |
eb948e50 | 2798 | struct ref_reloc_sym *reloc_sym = NULL; |
e0faa8d3 | 2799 | struct symbol *sym; |
6bb536cc | 2800 | struct symbol **syms = NULL; |
0e60836b | 2801 | struct probe_trace_event *tev; |
eb948e50 MH |
2802 | struct perf_probe_point *pp = &pev->point; |
2803 | struct probe_trace_point *tp; | |
564c62a4 | 2804 | int num_matched_functions; |
b031220d | 2805 | int ret, i, j, skipped = 0; |
c61fb959 | 2806 | char *mod_name; |
4235b045 | 2807 | |
44225521 | 2808 | map = get_target_map(pev->target, pev->uprobes); |
eb948e50 MH |
2809 | if (!map) { |
2810 | ret = -EINVAL; | |
2811 | goto out; | |
fb7345bb MH |
2812 | } |
2813 | ||
6bb536cc WN |
2814 | syms = malloc(sizeof(struct symbol *) * probe_conf.max_probes); |
2815 | if (!syms) { | |
2816 | ret = -ENOMEM; | |
2817 | goto out; | |
2818 | } | |
2819 | ||
eb948e50 MH |
2820 | /* |
2821 | * Load matched symbols: Since the different local symbols may have | |
2822 | * same name but different addresses, this lists all the symbols. | |
2823 | */ | |
6bb536cc | 2824 | num_matched_functions = find_probe_functions(map, pp->function, syms); |
564c62a4 | 2825 | if (num_matched_functions == 0) { |
eb948e50 | 2826 | pr_err("Failed to find symbol %s in %s\n", pp->function, |
44225521 | 2827 | pev->target ? : "kernel"); |
eb948e50 MH |
2828 | ret = -ENOENT; |
2829 | goto out; | |
ddb2f58f | 2830 | } else if (num_matched_functions > probe_conf.max_probes) { |
eb948e50 | 2831 | pr_err("Too many functions matched in %s\n", |
44225521 | 2832 | pev->target ? : "kernel"); |
eb948e50 MH |
2833 | ret = -E2BIG; |
2834 | goto out; | |
fb7345bb MH |
2835 | } |
2836 | ||
1a8ac29c | 2837 | /* Note that the symbols in the kmodule are not relocated */ |
7ab31d94 NR |
2838 | if (!pev->uprobes && !pev->target && |
2839 | (!pp->retprobe || kretprobe_offset_is_supported())) { | |
0560a0c4 | 2840 | reloc_sym = kernel_get_ref_reloc_sym(); |
eb948e50 MH |
2841 | if (!reloc_sym) { |
2842 | pr_warning("Relocated base symbol is not found!\n"); | |
2843 | ret = -EINVAL; | |
2844 | goto out; | |
2845 | } | |
2846 | } | |
4235b045 | 2847 | |
eb948e50 MH |
2848 | /* Setup result trace-probe-events */ |
2849 | *tevs = zalloc(sizeof(*tev) * num_matched_functions); | |
2850 | if (!*tevs) { | |
02b95dad | 2851 | ret = -ENOMEM; |
eb948e50 | 2852 | goto out; |
02b95dad | 2853 | } |
ce27a443 | 2854 | |
eb948e50 | 2855 | ret = 0; |
564c62a4 | 2856 | |
6bb536cc WN |
2857 | for (j = 0; j < num_matched_functions; j++) { |
2858 | sym = syms[j]; | |
2859 | ||
eb948e50 MH |
2860 | tev = (*tevs) + ret; |
2861 | tp = &tev->point; | |
2862 | if (ret == num_matched_functions) { | |
2863 | pr_warning("Too many symbols are listed. Skip it.\n"); | |
2864 | break; | |
ce27a443 | 2865 | } |
eb948e50 | 2866 | ret++; |
ce27a443 | 2867 | |
eb948e50 MH |
2868 | if (pp->offset > sym->end - sym->start) { |
2869 | pr_warning("Offset %ld is bigger than the size of %s\n", | |
2870 | pp->offset, sym->name); | |
2871 | ret = -ENOENT; | |
2872 | goto err_out; | |
2873 | } | |
2874 | /* Add one probe point */ | |
2875 | tp->address = map->unmap_ip(map, sym->start) + pp->offset; | |
1a8ac29c MH |
2876 | |
2877 | /* Check the kprobe (not in module) is within .text */ | |
2878 | if (!pev->uprobes && !pev->target && | |
b031220d MH |
2879 | kprobe_warn_out_range(sym->name, tp->address)) { |
2880 | tp->symbol = NULL; /* Skip it */ | |
2881 | skipped++; | |
2882 | } else if (reloc_sym) { | |
eb948e50 MH |
2883 | tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out); |
2884 | tp->offset = tp->address - reloc_sym->addr; | |
2885 | } else { | |
2886 | tp->symbol = strdup_or_goto(sym->name, nomem_out); | |
2887 | tp->offset = pp->offset; | |
2888 | } | |
6bb536cc WN |
2889 | tp->realname = strdup_or_goto(sym->name, nomem_out); |
2890 | ||
eb948e50 | 2891 | tp->retprobe = pp->retprobe; |
c61fb959 RB |
2892 | if (pev->target) { |
2893 | if (pev->uprobes) { | |
2894 | tev->point.module = strdup_or_goto(pev->target, | |
2895 | nomem_out); | |
2896 | } else { | |
2897 | mod_name = find_module_name(pev->target); | |
2898 | tev->point.module = | |
2899 | strdup(mod_name ? mod_name : pev->target); | |
2900 | free(mod_name); | |
2901 | if (!tev->point.module) | |
2902 | goto nomem_out; | |
2903 | } | |
2904 | } | |
eb948e50 MH |
2905 | tev->uprobes = pev->uprobes; |
2906 | tev->nargs = pev->nargs; | |
2907 | if (tev->nargs) { | |
2908 | tev->args = zalloc(sizeof(struct probe_trace_arg) * | |
2909 | tev->nargs); | |
2910 | if (tev->args == NULL) | |
2911 | goto nomem_out; | |
e334016f | 2912 | } |
48481938 | 2913 | for (i = 0; i < tev->nargs; i++) { |
eb948e50 MH |
2914 | if (pev->args[i].name) |
2915 | tev->args[i].name = | |
2916 | strdup_or_goto(pev->args[i].name, | |
2917 | nomem_out); | |
2918 | ||
2919 | tev->args[i].value = strdup_or_goto(pev->args[i].var, | |
2920 | nomem_out); | |
2921 | if (pev->args[i].type) | |
2922 | tev->args[i].type = | |
2923 | strdup_or_goto(pev->args[i].type, | |
2924 | nomem_out); | |
48481938 | 2925 | } |
0b3c2264 | 2926 | arch__fix_tev_from_maps(pev, tev, map, sym); |
4235b045 | 2927 | } |
b031220d MH |
2928 | if (ret == skipped) { |
2929 | ret = -ENOENT; | |
2930 | goto err_out; | |
2931 | } | |
4235b045 | 2932 | |
eb948e50 | 2933 | out: |
eebc509b | 2934 | map__put(map); |
6bb536cc | 2935 | free(syms); |
eb948e50 | 2936 | return ret; |
225466f1 | 2937 | |
eb948e50 MH |
2938 | nomem_out: |
2939 | ret = -ENOMEM; | |
2940 | err_out: | |
2941 | clear_probe_trace_events(*tevs, num_matched_functions); | |
2942 | zfree(tevs); | |
2943 | goto out; | |
2944 | } | |
1c1bc922 | 2945 | |
da15bd9d WN |
2946 | static int try_to_find_absolute_address(struct perf_probe_event *pev, |
2947 | struct probe_trace_event **tevs) | |
2948 | { | |
2949 | struct perf_probe_point *pp = &pev->point; | |
2950 | struct probe_trace_event *tev; | |
2951 | struct probe_trace_point *tp; | |
2952 | int i, err; | |
2953 | ||
2954 | if (!(pev->point.function && !strncmp(pev->point.function, "0x", 2))) | |
2955 | return -EINVAL; | |
2956 | if (perf_probe_event_need_dwarf(pev)) | |
2957 | return -EINVAL; | |
2958 | ||
2959 | /* | |
2960 | * This is 'perf probe /lib/libc.so 0xabcd'. Try to probe at | |
2961 | * absolute address. | |
2962 | * | |
2963 | * Only one tev can be generated by this. | |
2964 | */ | |
2965 | *tevs = zalloc(sizeof(*tev)); | |
2966 | if (!*tevs) | |
2967 | return -ENOMEM; | |
2968 | ||
2969 | tev = *tevs; | |
2970 | tp = &tev->point; | |
2971 | ||
2972 | /* | |
2973 | * Don't use tp->offset, use address directly, because | |
2974 | * in synthesize_probe_trace_command() address cannot be | |
2975 | * zero. | |
2976 | */ | |
2977 | tp->address = pev->point.abs_address; | |
2978 | tp->retprobe = pp->retprobe; | |
2979 | tev->uprobes = pev->uprobes; | |
2980 | ||
2981 | err = -ENOMEM; | |
2982 | /* | |
2983 | * Give it a '0x' leading symbol name. | |
2984 | * In __add_probe_trace_events, a NULL symbol is interpreted as | |
2985 | * invalud. | |
2986 | */ | |
2987 | if (asprintf(&tp->symbol, "0x%lx", tp->address) < 0) | |
2988 | goto errout; | |
2989 | ||
2990 | /* For kprobe, check range */ | |
2991 | if ((!tev->uprobes) && | |
2992 | (kprobe_warn_out_range(tev->point.symbol, | |
2993 | tev->point.address))) { | |
2994 | err = -EACCES; | |
2995 | goto errout; | |
2996 | } | |
2997 | ||
2998 | if (asprintf(&tp->realname, "abs_%lx", tp->address) < 0) | |
2999 | goto errout; | |
3000 | ||
3001 | if (pev->target) { | |
3002 | tp->module = strdup(pev->target); | |
3003 | if (!tp->module) | |
3004 | goto errout; | |
3005 | } | |
3006 | ||
3007 | if (tev->group) { | |
3008 | tev->group = strdup(pev->group); | |
3009 | if (!tev->group) | |
3010 | goto errout; | |
3011 | } | |
3012 | ||
3013 | if (pev->event) { | |
3014 | tev->event = strdup(pev->event); | |
3015 | if (!tev->event) | |
3016 | goto errout; | |
3017 | } | |
3018 | ||
3019 | tev->nargs = pev->nargs; | |
3020 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); | |
d1d0e29c | 3021 | if (!tev->args) |
da15bd9d | 3022 | goto errout; |
d1d0e29c | 3023 | |
da15bd9d WN |
3024 | for (i = 0; i < tev->nargs; i++) |
3025 | copy_to_probe_trace_arg(&tev->args[i], &pev->args[i]); | |
3026 | ||
3027 | return 1; | |
3028 | ||
3029 | errout: | |
42e233ca ME |
3030 | clear_probe_trace_events(*tevs, 1); |
3031 | *tevs = NULL; | |
da15bd9d WN |
3032 | return err; |
3033 | } | |
3034 | ||
42bba263 MH |
3035 | /* Concatinate two arrays */ |
3036 | static void *memcat(void *a, size_t sz_a, void *b, size_t sz_b) | |
3037 | { | |
3038 | void *ret; | |
3039 | ||
3040 | ret = malloc(sz_a + sz_b); | |
3041 | if (ret) { | |
3042 | memcpy(ret, a, sz_a); | |
3043 | memcpy(ret + sz_a, b, sz_b); | |
3044 | } | |
3045 | return ret; | |
3046 | } | |
3047 | ||
3048 | static int | |
3049 | concat_probe_trace_events(struct probe_trace_event **tevs, int *ntevs, | |
3050 | struct probe_trace_event **tevs2, int ntevs2) | |
3051 | { | |
3052 | struct probe_trace_event *new_tevs; | |
3053 | int ret = 0; | |
3054 | ||
f0a30dca | 3055 | if (*ntevs == 0) { |
42bba263 MH |
3056 | *tevs = *tevs2; |
3057 | *ntevs = ntevs2; | |
3058 | *tevs2 = NULL; | |
3059 | return 0; | |
3060 | } | |
3061 | ||
3062 | if (*ntevs + ntevs2 > probe_conf.max_probes) | |
3063 | ret = -E2BIG; | |
3064 | else { | |
3065 | /* Concatinate the array of probe_trace_event */ | |
3066 | new_tevs = memcat(*tevs, (*ntevs) * sizeof(**tevs), | |
3067 | *tevs2, ntevs2 * sizeof(**tevs2)); | |
3068 | if (!new_tevs) | |
3069 | ret = -ENOMEM; | |
3070 | else { | |
3071 | free(*tevs); | |
3072 | *tevs = new_tevs; | |
3073 | *ntevs += ntevs2; | |
3074 | } | |
3075 | } | |
3076 | if (ret < 0) | |
3077 | clear_probe_trace_events(*tevs2, ntevs2); | |
3078 | zfree(tevs2); | |
3079 | ||
3080 | return ret; | |
3081 | } | |
3082 | ||
3083 | /* | |
3084 | * Try to find probe_trace_event from given probe caches. Return the number | |
3085 | * of cached events found, if an error occurs return the error. | |
3086 | */ | |
3087 | static int find_cached_events(struct perf_probe_event *pev, | |
3088 | struct probe_trace_event **tevs, | |
3089 | const char *target) | |
3090 | { | |
3091 | struct probe_cache *cache; | |
3092 | struct probe_cache_entry *entry; | |
3093 | struct probe_trace_event *tmp_tevs = NULL; | |
3094 | int ntevs = 0; | |
3095 | int ret = 0; | |
3096 | ||
3097 | cache = probe_cache__new(target); | |
3098 | /* Return 0 ("not found") if the target has no probe cache. */ | |
3099 | if (!cache) | |
3100 | return 0; | |
3101 | ||
3102 | for_each_probe_cache_entry(entry, cache) { | |
3103 | /* Skip the cache entry which has no name */ | |
3104 | if (!entry->pev.event || !entry->pev.group) | |
3105 | continue; | |
3106 | if ((!pev->group || strglobmatch(entry->pev.group, pev->group)) && | |
3107 | strglobmatch(entry->pev.event, pev->event)) { | |
3108 | ret = probe_cache_entry__get_event(entry, &tmp_tevs); | |
3109 | if (ret > 0) | |
3110 | ret = concat_probe_trace_events(tevs, &ntevs, | |
3111 | &tmp_tevs, ret); | |
3112 | if (ret < 0) | |
3113 | break; | |
3114 | } | |
3115 | } | |
3116 | probe_cache__delete(cache); | |
3117 | if (ret < 0) { | |
3118 | clear_probe_trace_events(*tevs, ntevs); | |
3119 | zfree(tevs); | |
3120 | } else { | |
3121 | ret = ntevs; | |
3122 | if (ntevs > 0 && target && target[0] == '/') | |
3123 | pev->uprobes = true; | |
3124 | } | |
3125 | ||
3126 | return ret; | |
3127 | } | |
3128 | ||
1de7b8bf MH |
3129 | /* Try to find probe_trace_event from all probe caches */ |
3130 | static int find_cached_events_all(struct perf_probe_event *pev, | |
3131 | struct probe_trace_event **tevs) | |
3132 | { | |
3133 | struct probe_trace_event *tmp_tevs = NULL; | |
3134 | struct strlist *bidlist; | |
3135 | struct str_node *nd; | |
3136 | char *pathname; | |
3137 | int ntevs = 0; | |
3138 | int ret; | |
3139 | ||
3140 | /* Get the buildid list of all valid caches */ | |
3141 | bidlist = build_id_cache__list_all(true); | |
3142 | if (!bidlist) { | |
3143 | ret = -errno; | |
3144 | pr_debug("Failed to get buildids: %d\n", ret); | |
3145 | return ret; | |
3146 | } | |
3147 | ||
3148 | ret = 0; | |
3149 | strlist__for_each_entry(nd, bidlist) { | |
3150 | pathname = build_id_cache__origname(nd->s); | |
3151 | ret = find_cached_events(pev, &tmp_tevs, pathname); | |
3152 | /* In the case of cnt == 0, we just skip it */ | |
3153 | if (ret > 0) | |
3154 | ret = concat_probe_trace_events(tevs, &ntevs, | |
3155 | &tmp_tevs, ret); | |
3156 | free(pathname); | |
3157 | if (ret < 0) | |
3158 | break; | |
3159 | } | |
3160 | strlist__delete(bidlist); | |
3161 | ||
3162 | if (ret < 0) { | |
3163 | clear_probe_trace_events(*tevs, ntevs); | |
3164 | zfree(tevs); | |
3165 | } else | |
3166 | ret = ntevs; | |
3167 | ||
3168 | return ret; | |
3169 | } | |
3170 | ||
bc062230 MH |
3171 | static int find_probe_trace_events_from_cache(struct perf_probe_event *pev, |
3172 | struct probe_trace_event **tevs) | |
3173 | { | |
3174 | struct probe_cache *cache; | |
3175 | struct probe_cache_entry *entry; | |
3176 | struct probe_trace_event *tev; | |
3177 | struct str_node *node; | |
3178 | int ret, i; | |
3179 | ||
1de7b8bf | 3180 | if (pev->sdt) { |
42bba263 | 3181 | /* For SDT/cached events, we use special search functions */ |
1de7b8bf MH |
3182 | if (!pev->target) |
3183 | return find_cached_events_all(pev, tevs); | |
3184 | else | |
3185 | return find_cached_events(pev, tevs, pev->target); | |
3186 | } | |
bc062230 MH |
3187 | cache = probe_cache__new(pev->target); |
3188 | if (!cache) | |
3189 | return 0; | |
3190 | ||
3191 | entry = probe_cache__find(cache, pev); | |
3192 | if (!entry) { | |
36a009fe MH |
3193 | /* SDT must be in the cache */ |
3194 | ret = pev->sdt ? -ENOENT : 0; | |
bc062230 MH |
3195 | goto out; |
3196 | } | |
3197 | ||
3198 | ret = strlist__nr_entries(entry->tevlist); | |
3199 | if (ret > probe_conf.max_probes) { | |
3200 | pr_debug("Too many entries matched in the cache of %s\n", | |
3201 | pev->target ? : "kernel"); | |
3202 | ret = -E2BIG; | |
3203 | goto out; | |
3204 | } | |
3205 | ||
3206 | *tevs = zalloc(ret * sizeof(*tev)); | |
3207 | if (!*tevs) { | |
3208 | ret = -ENOMEM; | |
3209 | goto out; | |
3210 | } | |
3211 | ||
3212 | i = 0; | |
3213 | strlist__for_each_entry(node, entry->tevlist) { | |
3214 | tev = &(*tevs)[i++]; | |
3215 | ret = parse_probe_trace_command(node->s, tev); | |
3216 | if (ret < 0) | |
3217 | goto out; | |
3218 | /* Set the uprobes attribute as same as original */ | |
3219 | tev->uprobes = pev->uprobes; | |
3220 | } | |
3221 | ret = i; | |
3222 | ||
3223 | out: | |
3224 | probe_cache__delete(cache); | |
3225 | return ret; | |
3226 | } | |
3227 | ||
eb948e50 | 3228 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
ddb2f58f | 3229 | struct probe_trace_event **tevs) |
eb948e50 MH |
3230 | { |
3231 | int ret; | |
3232 | ||
36a009fe | 3233 | if (!pev->group && !pev->sdt) { |
2a12ec13 MH |
3234 | /* Set group name if not given */ |
3235 | if (!pev->uprobes) { | |
3236 | pev->group = strdup(PERFPROBE_GROUP); | |
3237 | ret = pev->group ? 0 : -ENOMEM; | |
3238 | } else | |
3239 | ret = convert_exec_to_group(pev->target, &pev->group); | |
eb948e50 MH |
3240 | if (ret != 0) { |
3241 | pr_warning("Failed to make a group name.\n"); | |
3242 | return ret; | |
3243 | } | |
02b95dad | 3244 | } |
e334016f | 3245 | |
da15bd9d WN |
3246 | ret = try_to_find_absolute_address(pev, tevs); |
3247 | if (ret > 0) | |
3248 | return ret; | |
3249 | ||
bc062230 MH |
3250 | /* At first, we need to lookup cache entry */ |
3251 | ret = find_probe_trace_events_from_cache(pev, tevs); | |
36a009fe MH |
3252 | if (ret > 0 || pev->sdt) /* SDT can be found only in the cache */ |
3253 | return ret == 0 ? -ENOENT : ret; /* Found in probe cache */ | |
bc062230 | 3254 | |
eb948e50 | 3255 | /* Convert perf_probe_event with debuginfo */ |
ddb2f58f | 3256 | ret = try_to_find_probe_trace_events(pev, tevs); |
eb948e50 MH |
3257 | if (ret != 0) |
3258 | return ret; /* Found in debuginfo or got an error */ | |
3259 | ||
ddb2f58f | 3260 | return find_probe_trace_events_from_map(pev, tevs); |
4235b045 MH |
3261 | } |
3262 | ||
12fae5ef | 3263 | int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs) |
4235b045 | 3264 | { |
844dffa5 | 3265 | int i, ret; |
4235b045 | 3266 | |
4235b045 MH |
3267 | /* Loop 1: convert all events */ |
3268 | for (i = 0; i < npevs; i++) { | |
b031220d | 3269 | /* Init kprobe blacklist if needed */ |
12fae5ef | 3270 | if (!pevs[i].uprobes) |
b031220d | 3271 | kprobe_blacklist__init(); |
4235b045 | 3272 | /* Convert with or without debuginfo */ |
12fae5ef | 3273 | ret = convert_to_probe_trace_events(&pevs[i], &pevs[i].tevs); |
146a1439 | 3274 | if (ret < 0) |
844dffa5 | 3275 | return ret; |
12fae5ef | 3276 | pevs[i].ntevs = ret; |
e0faa8d3 | 3277 | } |
b031220d MH |
3278 | /* This just release blacklist only if allocated */ |
3279 | kprobe_blacklist__release(); | |
e0faa8d3 | 3280 | |
844dffa5 NK |
3281 | return 0; |
3282 | } | |
3283 | ||
1c20b1d1 MH |
3284 | static int show_probe_trace_event(struct probe_trace_event *tev) |
3285 | { | |
3286 | char *buf = synthesize_probe_trace_command(tev); | |
3287 | ||
3288 | if (!buf) { | |
3289 | pr_debug("Failed to synthesize probe trace event.\n"); | |
3290 | return -EINVAL; | |
3291 | } | |
3292 | ||
3293 | /* Showing definition always go stdout */ | |
3294 | printf("%s\n", buf); | |
3295 | free(buf); | |
3296 | ||
3297 | return 0; | |
3298 | } | |
3299 | ||
3300 | int show_probe_trace_events(struct perf_probe_event *pevs, int npevs) | |
3301 | { | |
3302 | struct strlist *namelist = strlist__new(NULL, NULL); | |
3303 | struct probe_trace_event *tev; | |
3304 | struct perf_probe_event *pev; | |
3305 | int i, j, ret = 0; | |
3306 | ||
3307 | if (!namelist) | |
3308 | return -ENOMEM; | |
3309 | ||
3310 | for (j = 0; j < npevs && !ret; j++) { | |
3311 | pev = &pevs[j]; | |
3312 | for (i = 0; i < pev->ntevs && !ret; i++) { | |
3313 | tev = &pev->tevs[i]; | |
3314 | /* Skip if the symbol is out of .text or blacklisted */ | |
3315 | if (!tev->point.symbol && !pev->uprobes) | |
3316 | continue; | |
3317 | ||
3318 | /* Set new name for tev (and update namelist) */ | |
3319 | ret = probe_trace_event__set_name(tev, pev, | |
3320 | namelist, true); | |
3321 | if (!ret) | |
3322 | ret = show_probe_trace_event(tev); | |
3323 | } | |
3324 | } | |
3325 | strlist__delete(namelist); | |
3326 | ||
3327 | return ret; | |
3328 | } | |
3329 | ||
12fae5ef | 3330 | int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs) |
844dffa5 NK |
3331 | { |
3332 | int i, ret = 0; | |
3333 | ||
4235b045 | 3334 | /* Loop 2: add all events */ |
8635bf6e | 3335 | for (i = 0; i < npevs; i++) { |
12fae5ef WN |
3336 | ret = __add_probe_trace_events(&pevs[i], pevs[i].tevs, |
3337 | pevs[i].ntevs, | |
ddb2f58f | 3338 | probe_conf.force_add); |
fbee632d ACM |
3339 | if (ret < 0) |
3340 | break; | |
3341 | } | |
844dffa5 NK |
3342 | return ret; |
3343 | } | |
3344 | ||
12fae5ef | 3345 | void cleanup_perf_probe_events(struct perf_probe_event *pevs, int npevs) |
844dffa5 NK |
3346 | { |
3347 | int i, j; | |
3348 | ||
449e5b24 MH |
3349 | /* Loop 3: cleanup and free trace events */ |
3350 | for (i = 0; i < npevs; i++) { | |
12fae5ef WN |
3351 | for (j = 0; j < pevs[i].ntevs; j++) |
3352 | clear_probe_trace_event(&pevs[i].tevs[j]); | |
3353 | zfree(&pevs[i].tevs); | |
3354 | pevs[i].ntevs = 0; | |
a43aac29 | 3355 | clear_perf_probe_event(&pevs[i]); |
449e5b24 | 3356 | } |
844dffa5 NK |
3357 | } |
3358 | ||
3359 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs) | |
3360 | { | |
3361 | int ret; | |
844dffa5 | 3362 | |
9bae1e8c NK |
3363 | ret = init_probe_symbol_maps(pevs->uprobes); |
3364 | if (ret < 0) | |
3365 | return ret; | |
3366 | ||
12fae5ef | 3367 | ret = convert_perf_probe_events(pevs, npevs); |
844dffa5 | 3368 | if (ret == 0) |
12fae5ef | 3369 | ret = apply_perf_probe_events(pevs, npevs); |
844dffa5 | 3370 | |
12fae5ef | 3371 | cleanup_perf_probe_events(pevs, npevs); |
146a1439 | 3372 | |
9bae1e8c | 3373 | exit_probe_symbol_maps(); |
146a1439 | 3374 | return ret; |
e0faa8d3 MH |
3375 | } |
3376 | ||
307a464b | 3377 | int del_perf_probe_events(struct strfilter *filter) |
fa28244d | 3378 | { |
307a464b | 3379 | int ret, ret2, ufd = -1, kfd = -1; |
307a464b MH |
3380 | char *str = strfilter__string(filter); |
3381 | ||
3382 | if (!str) | |
3383 | return -EINVAL; | |
3384 | ||
fa28244d | 3385 | /* Get current event names */ |
92f6c72e MH |
3386 | ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW); |
3387 | if (ret < 0) | |
3388 | goto out; | |
467ec085 | 3389 | |
92f6c72e | 3390 | ret = probe_file__del_events(kfd, filter); |
307a464b | 3391 | if (ret < 0 && ret != -ENOENT) |
225466f1 | 3392 | goto error; |
225466f1 | 3393 | |
92f6c72e | 3394 | ret2 = probe_file__del_events(ufd, filter); |
dddc7ee3 | 3395 | if (ret2 < 0 && ret2 != -ENOENT) { |
307a464b | 3396 | ret = ret2; |
dddc7ee3 MH |
3397 | goto error; |
3398 | } | |
dddc7ee3 | 3399 | ret = 0; |
225466f1 SD |
3400 | |
3401 | error: | |
92f6c72e | 3402 | if (kfd >= 0) |
225466f1 | 3403 | close(kfd); |
92f6c72e | 3404 | if (ufd >= 0) |
225466f1 | 3405 | close(ufd); |
92f6c72e | 3406 | out: |
307a464b | 3407 | free(str); |
146a1439 MH |
3408 | |
3409 | return ret; | |
fa28244d | 3410 | } |
225466f1 | 3411 | |
2df58634 MH |
3412 | int show_available_funcs(const char *target, struct strfilter *_filter, |
3413 | bool user) | |
e80711ca | 3414 | { |
fd227598 | 3415 | struct rb_node *nd; |
e80711ca MH |
3416 | struct map *map; |
3417 | int ret; | |
3418 | ||
9bae1e8c | 3419 | ret = init_probe_symbol_maps(user); |
e80711ca MH |
3420 | if (ret < 0) |
3421 | return ret; | |
3422 | ||
2df58634 | 3423 | /* Get a symbol map */ |
eebc509b | 3424 | map = get_target_map(target, user); |
e80711ca | 3425 | if (!map) { |
2df58634 | 3426 | pr_err("Failed to get a map for %s\n", (target) ? : "kernel"); |
e80711ca MH |
3427 | return -EINVAL; |
3428 | } | |
225466f1 | 3429 | |
be39db9f | 3430 | ret = map__load(map); |
e7049342 MH |
3431 | if (ret) { |
3432 | if (ret == -2) { | |
3433 | char *str = strfilter__string(_filter); | |
3434 | pr_err("Failed to find symbols matched to \"%s\"\n", | |
3435 | str); | |
3436 | free(str); | |
3437 | } else | |
3438 | pr_err("Failed to load symbols in %s\n", | |
3439 | (target) ? : "kernel"); | |
2df58634 MH |
3440 | goto end; |
3441 | } | |
3442 | if (!dso__sorted_by_name(map->dso, map->type)) | |
3443 | dso__sort_by_name(map->dso, map->type); | |
225466f1 | 3444 | |
2df58634 MH |
3445 | /* Show all (filtered) symbols */ |
3446 | setup_pager(); | |
fd227598 ACM |
3447 | |
3448 | for (nd = rb_first(&map->dso->symbol_names[map->type]); nd; nd = rb_next(nd)) { | |
3449 | struct symbol_name_rb_node *pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); | |
3450 | ||
3451 | if (strfilter__compare(_filter, pos->sym.name)) | |
3452 | printf("%s\n", pos->sym.name); | |
3453 | } | |
3454 | ||
2df58634 | 3455 | end: |
eebc509b | 3456 | map__put(map); |
9bae1e8c | 3457 | exit_probe_symbol_maps(); |
225466f1 | 3458 | |
2df58634 | 3459 | return ret; |
225466f1 SD |
3460 | } |
3461 | ||
da15bd9d WN |
3462 | int copy_to_probe_trace_arg(struct probe_trace_arg *tvar, |
3463 | struct perf_probe_arg *pvar) | |
3464 | { | |
3465 | tvar->value = strdup(pvar->var); | |
3466 | if (tvar->value == NULL) | |
3467 | return -ENOMEM; | |
3468 | if (pvar->type) { | |
3469 | tvar->type = strdup(pvar->type); | |
3470 | if (tvar->type == NULL) | |
3471 | return -ENOMEM; | |
3472 | } | |
3473 | if (pvar->name) { | |
3474 | tvar->name = strdup(pvar->name); | |
3475 | if (tvar->name == NULL) | |
3476 | return -ENOMEM; | |
3477 | } else | |
3478 | tvar->name = NULL; | |
3479 | return 0; | |
3480 | } |