Commit | Line | Data |
---|---|---|
50656eec | 1 | /* |
0e60836b | 2 | * probe-event.c : perf-probe definition to probe_events format converter |
50656eec MH |
3 | * |
4 | * Written by Masami Hiramatsu <mhiramat@redhat.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | * | |
20 | */ | |
21 | ||
50656eec MH |
22 | #include <sys/utsname.h> |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | #include <fcntl.h> | |
26 | #include <errno.h> | |
27 | #include <stdio.h> | |
28 | #include <unistd.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
4de189fe MH |
31 | #include <stdarg.h> |
32 | #include <limits.h> | |
e80711ca | 33 | #include <elf.h> |
50656eec | 34 | |
31facc5f | 35 | #include "util.h" |
50656eec | 36 | #include "event.h" |
4de189fe | 37 | #include "strlist.h" |
50656eec | 38 | #include "debug.h" |
72041334 | 39 | #include "cache.h" |
631c9def | 40 | #include "color.h" |
e0faa8d3 MH |
41 | #include "symbol.h" |
42 | #include "thread.h" | |
553873e1 | 43 | #include <api/fs/debugfs.h> |
23773ca1 | 44 | #include <api/fs/tracefs.h> |
1d037ca1 | 45 | #include "trace-event.h" /* For __maybe_unused */ |
50656eec | 46 | #include "probe-event.h" |
4235b045 | 47 | #include "probe-finder.h" |
225466f1 | 48 | #include "session.h" |
50656eec MH |
49 | |
50 | #define MAX_CMDLEN 256 | |
50656eec MH |
51 | #define PERFPROBE_GROUP "probe" |
52 | ||
f4d7da49 MH |
53 | bool probe_event_dry_run; /* Dry run flag */ |
54 | ||
146a1439 | 55 | #define semantic_error(msg ...) pr_err("Semantic error :" msg) |
50656eec | 56 | |
4de189fe | 57 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
58 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
59 | __attribute__((format(printf, 3, 4))); | |
60 | ||
4de189fe MH |
61 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
62 | { | |
63 | int ret; | |
64 | va_list ap; | |
65 | va_start(ap, format); | |
66 | ret = vsnprintf(str, size, format, ap); | |
67 | va_end(ap); | |
68 | if (ret >= (int)size) | |
69 | ret = -E2BIG; | |
70 | return ret; | |
71 | } | |
72 | ||
4b4da7f7 | 73 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp); |
981d05ad | 74 | static void clear_probe_trace_event(struct probe_trace_event *tev); |
ee45b6c2 | 75 | static struct machine *host_machine; |
e0faa8d3 | 76 | |
469b9b88 | 77 | /* Initialize symbol maps and path of vmlinux/modules */ |
ee45b6c2 | 78 | static int init_symbol_maps(bool user_only) |
e0faa8d3 | 79 | { |
146a1439 MH |
80 | int ret; |
81 | ||
e0faa8d3 | 82 | symbol_conf.sort_by_name = true; |
680d926a | 83 | symbol_conf.allow_aliases = true; |
0a7e6d1b | 84 | ret = symbol__init(NULL); |
146a1439 MH |
85 | if (ret < 0) { |
86 | pr_debug("Failed to init symbol map.\n"); | |
87 | goto out; | |
88 | } | |
e0faa8d3 | 89 | |
ee45b6c2 MH |
90 | if (host_machine || user_only) /* already initialized */ |
91 | return 0; | |
d28c6223 | 92 | |
ee45b6c2 MH |
93 | if (symbol_conf.vmlinux_name) |
94 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
95 | ||
96 | host_machine = machine__new_host(); | |
97 | if (!host_machine) { | |
98 | pr_debug("machine__new_host() failed.\n"); | |
99 | symbol__exit(); | |
100 | ret = -1; | |
469b9b88 | 101 | } |
146a1439 MH |
102 | out: |
103 | if (ret < 0) | |
104 | pr_warning("Failed to init vmlinux path.\n"); | |
105 | return ret; | |
e0faa8d3 MH |
106 | } |
107 | ||
ee45b6c2 MH |
108 | static void exit_symbol_maps(void) |
109 | { | |
110 | if (host_machine) { | |
111 | machine__delete(host_machine); | |
112 | host_machine = NULL; | |
113 | } | |
114 | symbol__exit(); | |
115 | } | |
116 | ||
469b9b88 MH |
117 | static struct symbol *__find_kernel_function_by_name(const char *name, |
118 | struct map **mapp) | |
119 | { | |
ee45b6c2 | 120 | return machine__find_kernel_function_by_name(host_machine, name, mapp, |
469b9b88 MH |
121 | NULL); |
122 | } | |
123 | ||
8f33f7de MH |
124 | static struct symbol *__find_kernel_function(u64 addr, struct map **mapp) |
125 | { | |
126 | return machine__find_kernel_function(host_machine, addr, mapp, NULL); | |
127 | } | |
128 | ||
129 | static struct ref_reloc_sym *kernel_get_ref_reloc_sym(void) | |
130 | { | |
131 | /* kmap->ref_reloc_sym should be set if host_machine is initialized */ | |
132 | struct kmap *kmap; | |
133 | ||
134 | if (map__load(host_machine->vmlinux_maps[MAP__FUNCTION], NULL) < 0) | |
135 | return NULL; | |
136 | ||
137 | kmap = map__kmap(host_machine->vmlinux_maps[MAP__FUNCTION]); | |
138 | return kmap->ref_reloc_sym; | |
139 | } | |
140 | ||
141 | static u64 kernel_get_symbol_address_by_name(const char *name, bool reloc) | |
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) | |
150 | return (reloc) ? reloc_sym->addr : reloc_sym->unrelocated_addr; | |
151 | else { | |
152 | sym = __find_kernel_function_by_name(name, &map); | |
153 | if (sym) | |
154 | return map->unmap_ip(map, sym->start) - | |
f56847c2 | 155 | ((reloc) ? 0 : map->reloc); |
8f33f7de MH |
156 | } |
157 | return 0; | |
158 | } | |
159 | ||
e80711ca MH |
160 | static struct map *kernel_get_module_map(const char *module) |
161 | { | |
162 | struct rb_node *nd; | |
ee45b6c2 | 163 | struct map_groups *grp = &host_machine->kmaps; |
e80711ca | 164 | |
14a8fd7c MH |
165 | /* A file path -- this is an offline module */ |
166 | if (module && strchr(module, '/')) | |
ee45b6c2 | 167 | return machine__new_module(host_machine, 0, module); |
14a8fd7c | 168 | |
e80711ca MH |
169 | if (!module) |
170 | module = "kernel"; | |
171 | ||
172 | for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) { | |
173 | struct map *pos = rb_entry(nd, struct map, rb_node); | |
174 | if (strncmp(pos->dso->short_name + 1, module, | |
175 | pos->dso->short_name_len - 2) == 0) { | |
176 | return pos; | |
177 | } | |
178 | } | |
179 | return NULL; | |
180 | } | |
181 | ||
9b118aca MH |
182 | static struct map *get_target_map(const char *target, bool user) |
183 | { | |
184 | /* Init maps of given executable or kernel */ | |
185 | if (user) | |
186 | return dso__new_map(target); | |
187 | else | |
188 | return kernel_get_module_map(target); | |
189 | } | |
190 | ||
191 | static void put_target_map(struct map *map, bool user) | |
192 | { | |
193 | if (map && user) { | |
194 | /* Only the user map needs to be released */ | |
195 | dso__delete(map->dso); | |
196 | map__delete(map); | |
197 | } | |
198 | } | |
199 | ||
200 | ||
e80711ca | 201 | static struct dso *kernel_get_module_dso(const char *module) |
469b9b88 MH |
202 | { |
203 | struct dso *dso; | |
fd930ff9 FBH |
204 | struct map *map; |
205 | const char *vmlinux_name; | |
469b9b88 MH |
206 | |
207 | if (module) { | |
8fa7d87f WL |
208 | list_for_each_entry(dso, &host_machine->kernel_dsos.head, |
209 | node) { | |
469b9b88 MH |
210 | if (strncmp(dso->short_name + 1, module, |
211 | dso->short_name_len - 2) == 0) | |
212 | goto found; | |
213 | } | |
214 | pr_debug("Failed to find module %s.\n", module); | |
215 | return NULL; | |
fd930ff9 FBH |
216 | } |
217 | ||
ee45b6c2 | 218 | map = host_machine->vmlinux_maps[MAP__FUNCTION]; |
fd930ff9 FBH |
219 | dso = map->dso; |
220 | ||
221 | vmlinux_name = symbol_conf.vmlinux_name; | |
222 | if (vmlinux_name) { | |
5230fb7d | 223 | if (dso__load_vmlinux(dso, map, vmlinux_name, false, NULL) <= 0) |
fd930ff9 | 224 | return NULL; |
469b9b88 | 225 | } else { |
c3a34e06 | 226 | if (dso__load_vmlinux_path(dso, map, NULL) <= 0) { |
469b9b88 MH |
227 | pr_debug("Failed to load kernel map.\n"); |
228 | return NULL; | |
229 | } | |
230 | } | |
231 | found: | |
e80711ca MH |
232 | return dso; |
233 | } | |
234 | ||
235 | const char *kernel_get_module_path(const char *module) | |
236 | { | |
237 | struct dso *dso = kernel_get_module_dso(module); | |
238 | return (dso) ? dso->long_name : NULL; | |
469b9b88 MH |
239 | } |
240 | ||
fb7345bb MH |
241 | static int convert_exec_to_group(const char *exec, char **result) |
242 | { | |
243 | char *ptr1, *ptr2, *exec_copy; | |
244 | char buf[64]; | |
245 | int ret; | |
246 | ||
247 | exec_copy = strdup(exec); | |
248 | if (!exec_copy) | |
249 | return -ENOMEM; | |
250 | ||
251 | ptr1 = basename(exec_copy); | |
252 | if (!ptr1) { | |
253 | ret = -EINVAL; | |
254 | goto out; | |
255 | } | |
256 | ||
257 | ptr2 = strpbrk(ptr1, "-._"); | |
258 | if (ptr2) | |
259 | *ptr2 = '\0'; | |
260 | ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1); | |
261 | if (ret < 0) | |
262 | goto out; | |
263 | ||
264 | *result = strdup(buf); | |
265 | ret = *result ? 0 : -ENOMEM; | |
266 | ||
267 | out: | |
268 | free(exec_copy); | |
269 | return ret; | |
270 | } | |
271 | ||
9b118aca MH |
272 | static void clear_perf_probe_point(struct perf_probe_point *pp) |
273 | { | |
274 | free(pp->file); | |
275 | free(pp->function); | |
276 | free(pp->lazy_line); | |
277 | } | |
278 | ||
eb948e50 MH |
279 | static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs) |
280 | { | |
281 | int i; | |
282 | ||
283 | for (i = 0; i < ntevs; i++) | |
284 | clear_probe_trace_event(tevs + i); | |
285 | } | |
286 | ||
89fe808a | 287 | #ifdef HAVE_DWARF_SUPPORT |
9b118aca MH |
288 | /* |
289 | * Some binaries like glibc have special symbols which are on the symbol | |
290 | * table, but not in the debuginfo. If we can find the address of the | |
291 | * symbol from map, we can translate the address back to the probe point. | |
292 | */ | |
293 | static int find_alternative_probe_point(struct debuginfo *dinfo, | |
294 | struct perf_probe_point *pp, | |
295 | struct perf_probe_point *result, | |
296 | const char *target, bool uprobes) | |
297 | { | |
298 | struct map *map = NULL; | |
299 | struct symbol *sym; | |
300 | u64 address = 0; | |
301 | int ret = -ENOENT; | |
302 | ||
303 | /* This can work only for function-name based one */ | |
304 | if (!pp->function || pp->file) | |
305 | return -ENOTSUP; | |
306 | ||
307 | map = get_target_map(target, uprobes); | |
308 | if (!map) | |
309 | return -EINVAL; | |
310 | ||
311 | /* Find the address of given function */ | |
312 | map__for_each_symbol_by_name(map, pp->function, sym) { | |
e6d7c91c MH |
313 | if (uprobes) |
314 | address = sym->start; | |
315 | else | |
316 | address = map->unmap_ip(map, sym->start); | |
e578da3b | 317 | break; |
9b118aca MH |
318 | } |
319 | if (!address) { | |
320 | ret = -ENOENT; | |
321 | goto out; | |
322 | } | |
323 | pr_debug("Symbol %s address found : %lx\n", pp->function, address); | |
324 | ||
325 | ret = debuginfo__find_probe_point(dinfo, (unsigned long)address, | |
326 | result); | |
327 | if (ret <= 0) | |
328 | ret = (!ret) ? -ENOENT : ret; | |
329 | else { | |
330 | result->offset += pp->offset; | |
331 | result->line += pp->line; | |
332 | ret = 0; | |
333 | } | |
334 | ||
335 | out: | |
336 | put_target_map(map, uprobes); | |
337 | return ret; | |
338 | ||
339 | } | |
340 | ||
341 | static int get_alternative_probe_event(struct debuginfo *dinfo, | |
342 | struct perf_probe_event *pev, | |
343 | struct perf_probe_point *tmp, | |
344 | const char *target) | |
345 | { | |
346 | int ret; | |
347 | ||
348 | memcpy(tmp, &pev->point, sizeof(*tmp)); | |
349 | memset(&pev->point, 0, sizeof(pev->point)); | |
350 | ret = find_alternative_probe_point(dinfo, tmp, &pev->point, | |
351 | target, pev->uprobes); | |
352 | if (ret < 0) | |
353 | memcpy(&pev->point, tmp, sizeof(*tmp)); | |
354 | ||
355 | return ret; | |
356 | } | |
a15ad2f5 | 357 | |
811dd2ae MH |
358 | static int get_alternative_line_range(struct debuginfo *dinfo, |
359 | struct line_range *lr, | |
360 | const char *target, bool user) | |
361 | { | |
6d4a4896 DA |
362 | struct perf_probe_point pp = { .function = lr->function, |
363 | .file = lr->file, | |
364 | .line = lr->start }; | |
365 | struct perf_probe_point result; | |
811dd2ae MH |
366 | int ret, len = 0; |
367 | ||
6d4a4896 DA |
368 | memset(&result, 0, sizeof(result)); |
369 | ||
811dd2ae MH |
370 | if (lr->end != INT_MAX) |
371 | len = lr->end - lr->start; | |
372 | ret = find_alternative_probe_point(dinfo, &pp, &result, | |
373 | target, user); | |
374 | if (!ret) { | |
375 | lr->function = result.function; | |
376 | lr->file = result.file; | |
377 | lr->start = result.line; | |
378 | if (lr->end != INT_MAX) | |
379 | lr->end = lr->start + len; | |
380 | clear_perf_probe_point(&pp); | |
381 | } | |
382 | return ret; | |
383 | } | |
384 | ||
ff741783 | 385 | /* Open new debuginfo of given module */ |
92561cb7 | 386 | static struct debuginfo *open_debuginfo(const char *module, bool silent) |
e0faa8d3 | 387 | { |
a15ad2f5 | 388 | const char *path = module; |
92561cb7 | 389 | struct debuginfo *ret; |
ff741783 | 390 | |
a15ad2f5 | 391 | if (!module || !strchr(module, '/')) { |
14a8fd7c | 392 | path = kernel_get_module_path(module); |
14a8fd7c | 393 | if (!path) { |
92561cb7 MH |
394 | if (!silent) |
395 | pr_err("Failed to find path of %s module.\n", | |
396 | module ?: "kernel"); | |
14a8fd7c MH |
397 | return NULL; |
398 | } | |
e0faa8d3 | 399 | } |
92561cb7 MH |
400 | ret = debuginfo__new(path); |
401 | if (!ret && !silent) { | |
402 | pr_warning("The %s file has no debug information.\n", path); | |
403 | if (!module || !strtailcmp(path, ".ko")) | |
404 | pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, "); | |
405 | else | |
406 | pr_warning("Rebuild with -g, "); | |
407 | pr_warning("or install an appropriate debuginfo package.\n"); | |
408 | } | |
409 | return ret; | |
e0faa8d3 | 410 | } |
4b4da7f7 | 411 | |
92561cb7 | 412 | |
99ca4233 MH |
413 | static int get_text_start_address(const char *exec, unsigned long *address) |
414 | { | |
415 | Elf *elf; | |
416 | GElf_Ehdr ehdr; | |
417 | GElf_Shdr shdr; | |
418 | int fd, ret = -ENOENT; | |
419 | ||
420 | fd = open(exec, O_RDONLY); | |
421 | if (fd < 0) | |
422 | return -errno; | |
423 | ||
424 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
425 | if (elf == NULL) | |
426 | return -EINVAL; | |
427 | ||
428 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
429 | goto out; | |
430 | ||
431 | if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL)) | |
432 | goto out; | |
433 | ||
434 | *address = shdr.sh_addr - shdr.sh_offset; | |
435 | ret = 0; | |
436 | out: | |
437 | elf_end(elf); | |
438 | return ret; | |
439 | } | |
440 | ||
5a6f6314 MH |
441 | /* |
442 | * Convert trace point to probe point with debuginfo | |
443 | */ | |
444 | static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp, | |
445 | struct perf_probe_point *pp, | |
446 | bool is_kprobe) | |
447 | { | |
448 | struct debuginfo *dinfo = NULL; | |
449 | unsigned long stext = 0; | |
450 | u64 addr = tp->address; | |
451 | int ret = -ENOENT; | |
452 | ||
453 | /* convert the address to dwarf address */ | |
454 | if (!is_kprobe) { | |
455 | if (!addr) { | |
456 | ret = -EINVAL; | |
457 | goto error; | |
458 | } | |
459 | ret = get_text_start_address(tp->module, &stext); | |
460 | if (ret < 0) | |
461 | goto error; | |
462 | addr += stext; | |
463 | } else { | |
464 | addr = kernel_get_symbol_address_by_name(tp->symbol, false); | |
465 | if (addr == 0) | |
466 | goto error; | |
467 | addr += tp->offset; | |
468 | } | |
469 | ||
470 | pr_debug("try to find information at %" PRIx64 " in %s\n", addr, | |
471 | tp->module ? : "kernel"); | |
472 | ||
92561cb7 | 473 | dinfo = open_debuginfo(tp->module, verbose == 0); |
5a6f6314 MH |
474 | if (dinfo) { |
475 | ret = debuginfo__find_probe_point(dinfo, | |
476 | (unsigned long)addr, pp); | |
477 | debuginfo__delete(dinfo); | |
92561cb7 | 478 | } else |
5a6f6314 | 479 | ret = -ENOENT; |
5a6f6314 MH |
480 | |
481 | if (ret > 0) { | |
482 | pp->retprobe = tp->retprobe; | |
483 | return 0; | |
484 | } | |
485 | error: | |
486 | pr_debug("Failed to find corresponding probes from debuginfo.\n"); | |
487 | return ret ? : -ENOENT; | |
488 | } | |
489 | ||
fb7345bb MH |
490 | static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs, |
491 | int ntevs, const char *exec) | |
492 | { | |
493 | int i, ret = 0; | |
eb948e50 | 494 | unsigned long stext = 0; |
fb7345bb MH |
495 | |
496 | if (!exec) | |
497 | return 0; | |
498 | ||
499 | ret = get_text_start_address(exec, &stext); | |
500 | if (ret < 0) | |
501 | return ret; | |
502 | ||
503 | for (i = 0; i < ntevs && ret >= 0; i++) { | |
981a2379 | 504 | /* point.address is the addres of point.symbol + point.offset */ |
eb948e50 | 505 | tevs[i].point.address -= stext; |
fb7345bb | 506 | tevs[i].point.module = strdup(exec); |
eb948e50 | 507 | if (!tevs[i].point.module) { |
fb7345bb MH |
508 | ret = -ENOMEM; |
509 | break; | |
510 | } | |
511 | tevs[i].uprobes = true; | |
512 | } | |
513 | ||
514 | return ret; | |
515 | } | |
516 | ||
190b57fc MH |
517 | static int add_module_to_probe_trace_events(struct probe_trace_event *tevs, |
518 | int ntevs, const char *module) | |
519 | { | |
14a8fd7c MH |
520 | int i, ret = 0; |
521 | char *tmp; | |
522 | ||
523 | if (!module) | |
524 | return 0; | |
525 | ||
526 | tmp = strrchr(module, '/'); | |
527 | if (tmp) { | |
528 | /* This is a module path -- get the module name */ | |
529 | module = strdup(tmp + 1); | |
530 | if (!module) | |
531 | return -ENOMEM; | |
532 | tmp = strchr(module, '.'); | |
533 | if (tmp) | |
534 | *tmp = '\0'; | |
535 | tmp = (char *)module; /* For free() */ | |
536 | } | |
537 | ||
190b57fc MH |
538 | for (i = 0; i < ntevs; i++) { |
539 | tevs[i].point.module = strdup(module); | |
14a8fd7c MH |
540 | if (!tevs[i].point.module) { |
541 | ret = -ENOMEM; | |
542 | break; | |
543 | } | |
190b57fc | 544 | } |
14a8fd7c | 545 | |
f5385650 | 546 | free(tmp); |
14a8fd7c | 547 | return ret; |
190b57fc MH |
548 | } |
549 | ||
dfef99cd MH |
550 | /* Post processing the probe events */ |
551 | static int post_process_probe_trace_events(struct probe_trace_event *tevs, | |
552 | int ntevs, const char *module, | |
553 | bool uprobe) | |
554 | { | |
555 | struct ref_reloc_sym *reloc_sym; | |
556 | char *tmp; | |
557 | int i; | |
558 | ||
559 | if (uprobe) | |
560 | return add_exec_to_probe_trace_events(tevs, ntevs, module); | |
561 | ||
562 | /* Note that currently ref_reloc_sym based probe is not for drivers */ | |
563 | if (module) | |
564 | return add_module_to_probe_trace_events(tevs, ntevs, module); | |
565 | ||
8f33f7de | 566 | reloc_sym = kernel_get_ref_reloc_sym(); |
dfef99cd MH |
567 | if (!reloc_sym) { |
568 | pr_warning("Relocated base symbol is not found!\n"); | |
569 | return -EINVAL; | |
570 | } | |
571 | ||
572 | for (i = 0; i < ntevs; i++) { | |
25dd9171 | 573 | if (tevs[i].point.address && !tevs[i].point.retprobe) { |
dfef99cd MH |
574 | tmp = strdup(reloc_sym->name); |
575 | if (!tmp) | |
576 | return -ENOMEM; | |
577 | free(tevs[i].point.symbol); | |
578 | tevs[i].point.symbol = tmp; | |
579 | tevs[i].point.offset = tevs[i].point.address - | |
580 | reloc_sym->unrelocated_addr; | |
581 | } | |
582 | } | |
583 | return 0; | |
584 | } | |
585 | ||
4b4da7f7 | 586 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 587 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
190b57fc | 588 | struct probe_trace_event **tevs, |
4eced234 | 589 | int max_tevs, const char *target) |
4b4da7f7 MH |
590 | { |
591 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
9b118aca | 592 | struct perf_probe_point tmp; |
225466f1 | 593 | struct debuginfo *dinfo; |
190b57fc | 594 | int ntevs, ret = 0; |
4b4da7f7 | 595 | |
92561cb7 | 596 | dinfo = open_debuginfo(target, !need_dwarf); |
225466f1 | 597 | |
ff741783 | 598 | if (!dinfo) { |
92561cb7 | 599 | if (need_dwarf) |
ff741783 | 600 | return -ENOENT; |
ff741783 | 601 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
602 | return 0; |
603 | } | |
604 | ||
dfef99cd | 605 | pr_debug("Try to find probe point from debuginfo.\n"); |
ff741783 MH |
606 | /* Searching trace events corresponding to a probe event */ |
607 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs); | |
608 | ||
9b118aca MH |
609 | if (ntevs == 0) { /* Not found, retry with an alternative */ |
610 | ret = get_alternative_probe_event(dinfo, pev, &tmp, target); | |
611 | if (!ret) { | |
612 | ntevs = debuginfo__find_trace_events(dinfo, pev, | |
613 | tevs, max_tevs); | |
614 | /* | |
615 | * Write back to the original probe_event for | |
616 | * setting appropriate (user given) event name | |
617 | */ | |
618 | clear_perf_probe_point(&pev->point); | |
619 | memcpy(&pev->point, &tmp, sizeof(tmp)); | |
620 | } | |
621 | } | |
622 | ||
ff741783 | 623 | debuginfo__delete(dinfo); |
4b4da7f7 | 624 | |
146a1439 | 625 | if (ntevs > 0) { /* Succeeded to find trace events */ |
dfef99cd MH |
626 | pr_debug("Found %d probe_trace_events.\n", ntevs); |
627 | ret = post_process_probe_trace_events(*tevs, ntevs, | |
628 | target, pev->uprobes); | |
981d05ad MH |
629 | if (ret < 0) { |
630 | clear_probe_trace_events(*tevs, ntevs); | |
631 | zfree(tevs); | |
632 | } | |
190b57fc | 633 | return ret < 0 ? ret : ntevs; |
146a1439 | 634 | } |
4b4da7f7 | 635 | |
146a1439 | 636 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
0687eba7 | 637 | pr_warning("Probe point '%s' not found.\n", |
146a1439 | 638 | synthesize_perf_probe_point(&pev->point)); |
0687eba7 | 639 | return -ENOENT; |
146a1439 MH |
640 | } |
641 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
642 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
643 | if (ntevs == -EBADF) { | |
644 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
645 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
646 | if (!need_dwarf) { | |
0e43e5d2 | 647 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
648 | return 0; |
649 | } | |
4b4da7f7 | 650 | } |
15eca306 | 651 | return ntevs; |
4b4da7f7 MH |
652 | } |
653 | ||
7cf0b79e MH |
654 | /* |
655 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
656 | * and chop off leading directories that do not exist. Result is passed back as | |
657 | * a newly allocated path on success. | |
658 | * Return 0 if file was found and readable, -errno otherwise. | |
659 | */ | |
6a330a3c MH |
660 | static int get_real_path(const char *raw_path, const char *comp_dir, |
661 | char **new_path) | |
7cf0b79e | 662 | { |
6a330a3c MH |
663 | const char *prefix = symbol_conf.source_prefix; |
664 | ||
665 | if (!prefix) { | |
666 | if (raw_path[0] != '/' && comp_dir) | |
667 | /* If not an absolute path, try to use comp_dir */ | |
668 | prefix = comp_dir; | |
669 | else { | |
670 | if (access(raw_path, R_OK) == 0) { | |
671 | *new_path = strdup(raw_path); | |
38ae502b | 672 | return *new_path ? 0 : -ENOMEM; |
6a330a3c MH |
673 | } else |
674 | return -errno; | |
675 | } | |
7cf0b79e MH |
676 | } |
677 | ||
6a330a3c | 678 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
7cf0b79e MH |
679 | if (!*new_path) |
680 | return -ENOMEM; | |
681 | ||
682 | for (;;) { | |
6a330a3c | 683 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
7cf0b79e MH |
684 | |
685 | if (access(*new_path, R_OK) == 0) | |
686 | return 0; | |
687 | ||
eb47cb2e | 688 | if (!symbol_conf.source_prefix) { |
6a330a3c | 689 | /* In case of searching comp_dir, don't retry */ |
eb47cb2e | 690 | zfree(new_path); |
6a330a3c | 691 | return -errno; |
eb47cb2e | 692 | } |
6a330a3c | 693 | |
7cf0b79e MH |
694 | switch (errno) { |
695 | case ENAMETOOLONG: | |
696 | case ENOENT: | |
697 | case EROFS: | |
698 | case EFAULT: | |
699 | raw_path = strchr(++raw_path, '/'); | |
700 | if (!raw_path) { | |
04662523 | 701 | zfree(new_path); |
7cf0b79e MH |
702 | return -ENOENT; |
703 | } | |
704 | continue; | |
705 | ||
706 | default: | |
04662523 | 707 | zfree(new_path); |
7cf0b79e MH |
708 | return -errno; |
709 | } | |
710 | } | |
711 | } | |
712 | ||
4b4da7f7 MH |
713 | #define LINEBUF_SIZE 256 |
714 | #define NR_ADDITIONAL_LINES 2 | |
715 | ||
fde52dbd | 716 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 | 717 | { |
5f03cba4 | 718 | char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE]; |
befe3414 FBH |
719 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
720 | const char *prefix = NULL; | |
4b4da7f7 | 721 | |
befe3414 | 722 | do { |
4b4da7f7 MH |
723 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
724 | goto error; | |
befe3414 FBH |
725 | if (skip) |
726 | continue; | |
727 | if (!prefix) { | |
728 | prefix = show_num ? "%7d " : " "; | |
729 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 730 | } |
befe3414 FBH |
731 | color_fprintf(stdout, color, "%s", buf); |
732 | ||
733 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 734 | |
fde52dbd | 735 | return 1; |
4b4da7f7 | 736 | error: |
fde52dbd | 737 | if (ferror(fp)) { |
5f03cba4 MH |
738 | pr_warning("File read error: %s\n", |
739 | strerror_r(errno, sbuf, sizeof(sbuf))); | |
fde52dbd FBH |
740 | return -1; |
741 | } | |
742 | return 0; | |
743 | } | |
146a1439 | 744 | |
fde52dbd FBH |
745 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
746 | { | |
747 | int rv = __show_one_line(fp, l, skip, show_num); | |
748 | if (rv == 0) { | |
749 | pr_warning("Source file is shorter than expected.\n"); | |
750 | rv = -1; | |
751 | } | |
752 | return rv; | |
4b4da7f7 MH |
753 | } |
754 | ||
fde52dbd FBH |
755 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
756 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
757 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
758 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
759 | ||
4b4da7f7 MH |
760 | /* |
761 | * Show line-range always requires debuginfo to find source file and | |
762 | * line number. | |
763 | */ | |
811dd2ae MH |
764 | static int __show_line_range(struct line_range *lr, const char *module, |
765 | bool user) | |
4b4da7f7 | 766 | { |
d3b63d7a | 767 | int l = 1; |
5a62257a | 768 | struct int_node *ln; |
ff741783 | 769 | struct debuginfo *dinfo; |
4b4da7f7 | 770 | FILE *fp; |
ff741783 | 771 | int ret; |
7cf0b79e | 772 | char *tmp; |
5f03cba4 | 773 | char sbuf[STRERR_BUFSIZE]; |
4b4da7f7 MH |
774 | |
775 | /* Search a line range */ | |
92561cb7 MH |
776 | dinfo = open_debuginfo(module, false); |
777 | if (!dinfo) | |
ff741783 | 778 | return -ENOENT; |
146a1439 | 779 | |
ff741783 | 780 | ret = debuginfo__find_line_range(dinfo, lr); |
811dd2ae MH |
781 | if (!ret) { /* Not found, retry with an alternative */ |
782 | ret = get_alternative_line_range(dinfo, lr, module, user); | |
783 | if (!ret) | |
784 | ret = debuginfo__find_line_range(dinfo, lr); | |
785 | } | |
ff741783 | 786 | debuginfo__delete(dinfo); |
5ee05b88 | 787 | if (ret == 0 || ret == -ENOENT) { |
146a1439 MH |
788 | pr_warning("Specified source line is not found.\n"); |
789 | return -ENOENT; | |
790 | } else if (ret < 0) { | |
5ee05b88 | 791 | pr_warning("Debuginfo analysis failed.\n"); |
146a1439 MH |
792 | return ret; |
793 | } | |
4b4da7f7 | 794 | |
7cf0b79e MH |
795 | /* Convert source file path */ |
796 | tmp = lr->path; | |
6a330a3c | 797 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
a78604de HK |
798 | |
799 | /* Free old path when new path is assigned */ | |
800 | if (tmp != lr->path) | |
801 | free(tmp); | |
802 | ||
7cf0b79e | 803 | if (ret < 0) { |
5ee05b88 | 804 | pr_warning("Failed to find source file path.\n"); |
7cf0b79e MH |
805 | return ret; |
806 | } | |
807 | ||
4b4da7f7 MH |
808 | setup_pager(); |
809 | ||
810 | if (lr->function) | |
8737ebde | 811 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
812 | lr->start - lr->offset); |
813 | else | |
62c15fc4 | 814 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
815 | |
816 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
817 | if (fp == NULL) { |
818 | pr_warning("Failed to open %s: %s\n", lr->path, | |
5f03cba4 | 819 | strerror_r(errno, sbuf, sizeof(sbuf))); |
146a1439 MH |
820 | return -errno; |
821 | } | |
4b4da7f7 | 822 | /* Skip to starting line number */ |
44b81e92 | 823 | while (l < lr->start) { |
fde52dbd | 824 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
825 | if (ret < 0) |
826 | goto end; | |
827 | } | |
4b4da7f7 | 828 | |
5a62257a MH |
829 | intlist__for_each(ln, lr->line_list) { |
830 | for (; ln->i > l; l++) { | |
fde52dbd | 831 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
832 | if (ret < 0) |
833 | goto end; | |
834 | } | |
fde52dbd | 835 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
836 | if (ret < 0) |
837 | goto end; | |
4b4da7f7 MH |
838 | } |
839 | ||
840 | if (lr->end == INT_MAX) | |
841 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
842 | while (l <= lr->end) { |
843 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
844 | if (ret <= 0) | |
44b81e92 FBH |
845 | break; |
846 | } | |
146a1439 | 847 | end: |
4b4da7f7 | 848 | fclose(fp); |
146a1439 | 849 | return ret; |
4b4da7f7 MH |
850 | } |
851 | ||
2b394bc4 | 852 | int show_line_range(struct line_range *lr, const char *module, bool user) |
ee45b6c2 MH |
853 | { |
854 | int ret; | |
855 | ||
2b394bc4 | 856 | ret = init_symbol_maps(user); |
ee45b6c2 MH |
857 | if (ret < 0) |
858 | return ret; | |
811dd2ae | 859 | ret = __show_line_range(lr, module, user); |
ee45b6c2 MH |
860 | exit_symbol_maps(); |
861 | ||
862 | return ret; | |
863 | } | |
864 | ||
ff741783 MH |
865 | static int show_available_vars_at(struct debuginfo *dinfo, |
866 | struct perf_probe_event *pev, | |
bd09d7b5 | 867 | int max_vls, struct strfilter *_filter, |
9b118aca | 868 | bool externs, const char *target) |
cf6eb489 MH |
869 | { |
870 | char *buf; | |
bd09d7b5 | 871 | int ret, i, nvars; |
cf6eb489 MH |
872 | struct str_node *node; |
873 | struct variable_list *vls = NULL, *vl; | |
9b118aca | 874 | struct perf_probe_point tmp; |
bd09d7b5 | 875 | const char *var; |
cf6eb489 MH |
876 | |
877 | buf = synthesize_perf_probe_point(&pev->point); | |
878 | if (!buf) | |
879 | return -EINVAL; | |
880 | pr_debug("Searching variables at %s\n", buf); | |
881 | ||
ff741783 MH |
882 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls, |
883 | max_vls, externs); | |
9b118aca MH |
884 | if (!ret) { /* Not found, retry with an alternative */ |
885 | ret = get_alternative_probe_event(dinfo, pev, &tmp, target); | |
886 | if (!ret) { | |
887 | ret = debuginfo__find_available_vars_at(dinfo, pev, | |
888 | &vls, max_vls, externs); | |
889 | /* Release the old probe_point */ | |
890 | clear_perf_probe_point(&tmp); | |
891 | } | |
892 | } | |
bd09d7b5 | 893 | if (ret <= 0) { |
69e96eaa MH |
894 | if (ret == 0 || ret == -ENOENT) { |
895 | pr_err("Failed to find the address of %s\n", buf); | |
896 | ret = -ENOENT; | |
897 | } else | |
898 | pr_warning("Debuginfo analysis failed.\n"); | |
bd09d7b5 MH |
899 | goto end; |
900 | } | |
69e96eaa | 901 | |
bd09d7b5 MH |
902 | /* Some variables are found */ |
903 | fprintf(stdout, "Available variables at %s\n", buf); | |
904 | for (i = 0; i < ret; i++) { | |
905 | vl = &vls[i]; | |
906 | /* | |
907 | * A probe point might be converted to | |
908 | * several trace points. | |
909 | */ | |
910 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
911 | vl->point.offset); | |
74cf249d | 912 | zfree(&vl->point.symbol); |
bd09d7b5 MH |
913 | nvars = 0; |
914 | if (vl->vars) { | |
915 | strlist__for_each(node, vl->vars) { | |
916 | var = strchr(node->s, '\t') + 1; | |
917 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 918 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
919 | nvars++; |
920 | } | |
921 | } | |
922 | strlist__delete(vl->vars); | |
cf6eb489 | 923 | } |
bd09d7b5 MH |
924 | if (nvars == 0) |
925 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
926 | } | |
927 | free(vls); | |
928 | end: | |
cf6eb489 MH |
929 | free(buf); |
930 | return ret; | |
931 | } | |
932 | ||
933 | /* Show available variables on given probe point */ | |
934 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
bd09d7b5 MH |
935 | int max_vls, const char *module, |
936 | struct strfilter *_filter, bool externs) | |
cf6eb489 | 937 | { |
ff741783 MH |
938 | int i, ret = 0; |
939 | struct debuginfo *dinfo; | |
cf6eb489 | 940 | |
2b394bc4 | 941 | ret = init_symbol_maps(pevs->uprobes); |
cf6eb489 MH |
942 | if (ret < 0) |
943 | return ret; | |
944 | ||
92561cb7 | 945 | dinfo = open_debuginfo(module, false); |
ff741783 | 946 | if (!dinfo) { |
ee45b6c2 MH |
947 | ret = -ENOENT; |
948 | goto out; | |
ff741783 MH |
949 | } |
950 | ||
cf6eb489 MH |
951 | setup_pager(); |
952 | ||
ff741783 MH |
953 | for (i = 0; i < npevs && ret >= 0; i++) |
954 | ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter, | |
9b118aca | 955 | externs, module); |
ff741783 MH |
956 | |
957 | debuginfo__delete(dinfo); | |
ee45b6c2 MH |
958 | out: |
959 | exit_symbol_maps(); | |
cf6eb489 MH |
960 | return ret; |
961 | } | |
962 | ||
89fe808a | 963 | #else /* !HAVE_DWARF_SUPPORT */ |
4b4da7f7 | 964 | |
5a6f6314 MH |
965 | static int |
966 | find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused, | |
967 | struct perf_probe_point *pp __maybe_unused, | |
968 | bool is_kprobe __maybe_unused) | |
4b4da7f7 | 969 | { |
5a6f6314 | 970 | return -ENOSYS; |
4b4da7f7 MH |
971 | } |
972 | ||
0e60836b | 973 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
1d037ca1 | 974 | struct probe_trace_event **tevs __maybe_unused, |
1d027ee9 ACM |
975 | int max_tevs __maybe_unused, |
976 | const char *target __maybe_unused) | |
4b4da7f7 | 977 | { |
146a1439 MH |
978 | if (perf_probe_event_need_dwarf(pev)) { |
979 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
980 | return -ENOSYS; | |
981 | } | |
225466f1 | 982 | |
4b4da7f7 MH |
983 | return 0; |
984 | } | |
985 | ||
1d037ca1 | 986 | int show_line_range(struct line_range *lr __maybe_unused, |
2b394bc4 MH |
987 | const char *module __maybe_unused, |
988 | bool user __maybe_unused) | |
4b4da7f7 | 989 | { |
146a1439 MH |
990 | pr_warning("Debuginfo-analysis is not supported.\n"); |
991 | return -ENOSYS; | |
4b4da7f7 MH |
992 | } |
993 | ||
1d037ca1 IT |
994 | int show_available_vars(struct perf_probe_event *pevs __maybe_unused, |
995 | int npevs __maybe_unused, int max_vls __maybe_unused, | |
996 | const char *module __maybe_unused, | |
997 | struct strfilter *filter __maybe_unused, | |
998 | bool externs __maybe_unused) | |
cf6eb489 MH |
999 | { |
1000 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
1001 | return -ENOSYS; | |
1002 | } | |
e0faa8d3 MH |
1003 | #endif |
1004 | ||
e53b00d3 MH |
1005 | void line_range__clear(struct line_range *lr) |
1006 | { | |
e53b00d3 MH |
1007 | free(lr->function); |
1008 | free(lr->file); | |
1009 | free(lr->path); | |
1010 | free(lr->comp_dir); | |
5a62257a | 1011 | intlist__delete(lr->line_list); |
e53b00d3 MH |
1012 | memset(lr, 0, sizeof(*lr)); |
1013 | } | |
1014 | ||
5a62257a | 1015 | int line_range__init(struct line_range *lr) |
e53b00d3 MH |
1016 | { |
1017 | memset(lr, 0, sizeof(*lr)); | |
5a62257a MH |
1018 | lr->line_list = intlist__new(NULL); |
1019 | if (!lr->line_list) | |
1020 | return -ENOMEM; | |
1021 | else | |
1022 | return 0; | |
e53b00d3 MH |
1023 | } |
1024 | ||
21dd9ae5 FBH |
1025 | static int parse_line_num(char **ptr, int *val, const char *what) |
1026 | { | |
1027 | const char *start = *ptr; | |
1028 | ||
1029 | errno = 0; | |
1030 | *val = strtol(*ptr, ptr, 0); | |
1031 | if (errno || *ptr == start) { | |
1032 | semantic_error("'%s' is not a valid number.\n", what); | |
1033 | return -EINVAL; | |
1034 | } | |
1035 | return 0; | |
1036 | } | |
1037 | ||
9d95b580 FBH |
1038 | /* |
1039 | * Stuff 'lr' according to the line range described by 'arg'. | |
1040 | * The line range syntax is described by: | |
1041 | * | |
1042 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 1043 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 1044 | */ |
146a1439 | 1045 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 1046 | { |
e116dfa1 | 1047 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
1048 | int err; |
1049 | ||
1050 | if (!name) | |
1051 | return -ENOMEM; | |
1052 | ||
1053 | lr->start = 0; | |
1054 | lr->end = INT_MAX; | |
1055 | ||
1056 | range = strchr(name, ':'); | |
1057 | if (range) { | |
1058 | *range++ = '\0'; | |
1059 | ||
1060 | err = parse_line_num(&range, &lr->start, "start line"); | |
1061 | if (err) | |
1062 | goto err; | |
1063 | ||
1064 | if (*range == '+' || *range == '-') { | |
1065 | const char c = *range++; | |
1066 | ||
1067 | err = parse_line_num(&range, &lr->end, "end line"); | |
1068 | if (err) | |
1069 | goto err; | |
1070 | ||
1071 | if (c == '+') { | |
1072 | lr->end += lr->start; | |
1073 | /* | |
1074 | * Adjust the number of lines here. | |
1075 | * If the number of lines == 1, the | |
1076 | * the end of line should be equal to | |
1077 | * the start of line. | |
1078 | */ | |
1079 | lr->end--; | |
1080 | } | |
1081 | } | |
9d95b580 | 1082 | |
d3b63d7a | 1083 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
1084 | |
1085 | err = -EINVAL; | |
d3b63d7a | 1086 | if (lr->start > lr->end) { |
631c9def | 1087 | semantic_error("Start line must be smaller" |
146a1439 | 1088 | " than end line.\n"); |
21dd9ae5 | 1089 | goto err; |
146a1439 | 1090 | } |
21dd9ae5 FBH |
1091 | if (*range != '\0') { |
1092 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
1093 | goto err; | |
146a1439 | 1094 | } |
d3b63d7a | 1095 | } |
02b95dad | 1096 | |
e116dfa1 MH |
1097 | file = strchr(name, '@'); |
1098 | if (file) { | |
1099 | *file = '\0'; | |
1100 | lr->file = strdup(++file); | |
1101 | if (lr->file == NULL) { | |
1102 | err = -ENOMEM; | |
1103 | goto err; | |
1104 | } | |
1105 | lr->function = name; | |
1106 | } else if (strchr(name, '.')) | |
21dd9ae5 | 1107 | lr->file = name; |
631c9def | 1108 | else |
21dd9ae5 | 1109 | lr->function = name; |
146a1439 MH |
1110 | |
1111 | return 0; | |
21dd9ae5 FBH |
1112 | err: |
1113 | free(name); | |
1114 | return err; | |
631c9def MH |
1115 | } |
1116 | ||
b7702a21 MH |
1117 | /* Check the name is good for event/group */ |
1118 | static bool check_event_name(const char *name) | |
1119 | { | |
1120 | if (!isalpha(*name) && *name != '_') | |
1121 | return false; | |
1122 | while (*++name != '\0') { | |
1123 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
1124 | return false; | |
1125 | } | |
1126 | return true; | |
1127 | } | |
1128 | ||
50656eec | 1129 | /* Parse probepoint definition. */ |
146a1439 | 1130 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 1131 | { |
4235b045 | 1132 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
1133 | char *ptr, *tmp; |
1134 | char c, nc = 0; | |
1135 | /* | |
1136 | * <Syntax> | |
2a9c8c36 MH |
1137 | * perf probe [EVENT=]SRC[:LN|;PTN] |
1138 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
1139 | * |
1140 | * TODO:Group name support | |
50656eec MH |
1141 | */ |
1142 | ||
2a9c8c36 MH |
1143 | ptr = strpbrk(arg, ";=@+%"); |
1144 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
1145 | *ptr = '\0'; |
1146 | tmp = ptr + 1; | |
146a1439 MH |
1147 | if (strchr(arg, ':')) { |
1148 | semantic_error("Group name is not supported yet.\n"); | |
1149 | return -ENOTSUP; | |
1150 | } | |
1151 | if (!check_event_name(arg)) { | |
b7702a21 | 1152 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
1153 | "follow C symbol-naming rule.\n", arg); |
1154 | return -EINVAL; | |
1155 | } | |
02b95dad MH |
1156 | pev->event = strdup(arg); |
1157 | if (pev->event == NULL) | |
1158 | return -ENOMEM; | |
4235b045 | 1159 | pev->group = NULL; |
af663d75 MH |
1160 | arg = tmp; |
1161 | } | |
1162 | ||
2a9c8c36 | 1163 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
1164 | if (ptr) { |
1165 | nc = *ptr; | |
1166 | *ptr++ = '\0'; | |
1167 | } | |
1168 | ||
02b95dad MH |
1169 | tmp = strdup(arg); |
1170 | if (tmp == NULL) | |
1171 | return -ENOMEM; | |
1172 | ||
50656eec | 1173 | /* Check arg is function or file and copy it */ |
02b95dad MH |
1174 | if (strchr(tmp, '.')) /* File */ |
1175 | pp->file = tmp; | |
50656eec | 1176 | else /* Function */ |
02b95dad | 1177 | pp->function = tmp; |
50656eec MH |
1178 | |
1179 | /* Parse other options */ | |
1180 | while (ptr) { | |
1181 | arg = ptr; | |
1182 | c = nc; | |
2a9c8c36 | 1183 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
1184 | pp->lazy_line = strdup(arg); |
1185 | if (pp->lazy_line == NULL) | |
1186 | return -ENOMEM; | |
2a9c8c36 MH |
1187 | break; |
1188 | } | |
1189 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
1190 | if (ptr) { |
1191 | nc = *ptr; | |
1192 | *ptr++ = '\0'; | |
1193 | } | |
1194 | switch (c) { | |
1195 | case ':': /* Line number */ | |
1196 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 1197 | if (*tmp != '\0') { |
2a9c8c36 | 1198 | semantic_error("There is non-digit char" |
146a1439 MH |
1199 | " in line number.\n"); |
1200 | return -EINVAL; | |
1201 | } | |
50656eec MH |
1202 | break; |
1203 | case '+': /* Byte offset from a symbol */ | |
1204 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 1205 | if (*tmp != '\0') { |
2a9c8c36 | 1206 | semantic_error("There is non-digit character" |
146a1439 MH |
1207 | " in offset.\n"); |
1208 | return -EINVAL; | |
1209 | } | |
50656eec MH |
1210 | break; |
1211 | case '@': /* File name */ | |
146a1439 MH |
1212 | if (pp->file) { |
1213 | semantic_error("SRC@SRC is not allowed.\n"); | |
1214 | return -EINVAL; | |
1215 | } | |
02b95dad MH |
1216 | pp->file = strdup(arg); |
1217 | if (pp->file == NULL) | |
1218 | return -ENOMEM; | |
50656eec MH |
1219 | break; |
1220 | case '%': /* Probe places */ | |
1221 | if (strcmp(arg, "return") == 0) { | |
1222 | pp->retprobe = 1; | |
146a1439 MH |
1223 | } else { /* Others not supported yet */ |
1224 | semantic_error("%%%s is not supported.\n", arg); | |
1225 | return -ENOTSUP; | |
1226 | } | |
50656eec | 1227 | break; |
146a1439 MH |
1228 | default: /* Buggy case */ |
1229 | pr_err("This program has a bug at %s:%d.\n", | |
1230 | __FILE__, __LINE__); | |
1231 | return -ENOTSUP; | |
50656eec MH |
1232 | break; |
1233 | } | |
1234 | } | |
1235 | ||
1236 | /* Exclusion check */ | |
146a1439 | 1237 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
1238 | semantic_error("Lazy pattern can't be used with" |
1239 | " line number.\n"); | |
146a1439 MH |
1240 | return -EINVAL; |
1241 | } | |
2a9c8c36 | 1242 | |
146a1439 | 1243 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 1244 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
1245 | return -EINVAL; |
1246 | } | |
2a9c8c36 | 1247 | |
146a1439 | 1248 | if (pp->line && pp->offset) { |
0e43e5d2 | 1249 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
1250 | return -EINVAL; |
1251 | } | |
50656eec | 1252 | |
146a1439 | 1253 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 1254 | semantic_error("File always requires line number or " |
0e43e5d2 | 1255 | "lazy pattern.\n"); |
146a1439 MH |
1256 | return -EINVAL; |
1257 | } | |
50656eec | 1258 | |
146a1439 | 1259 | if (pp->offset && !pp->function) { |
0e43e5d2 | 1260 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
1261 | return -EINVAL; |
1262 | } | |
50656eec | 1263 | |
146a1439 | 1264 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 1265 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
1266 | return -EINVAL; |
1267 | } | |
50656eec | 1268 | |
146a1439 | 1269 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 1270 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 1271 | "return probe.\n"); |
146a1439 MH |
1272 | return -EINVAL; |
1273 | } | |
50656eec | 1274 | |
4235b045 | 1275 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
1276 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
1277 | pp->lazy_line); | |
146a1439 | 1278 | return 0; |
50656eec MH |
1279 | } |
1280 | ||
7df2f329 | 1281 | /* Parse perf-probe event argument */ |
146a1439 | 1282 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 1283 | { |
b2a3c12b | 1284 | char *tmp, *goodname; |
7df2f329 MH |
1285 | struct perf_probe_arg_field **fieldp; |
1286 | ||
1287 | pr_debug("parsing arg: %s into ", str); | |
1288 | ||
48481938 MH |
1289 | tmp = strchr(str, '='); |
1290 | if (tmp) { | |
02b95dad MH |
1291 | arg->name = strndup(str, tmp - str); |
1292 | if (arg->name == NULL) | |
1293 | return -ENOMEM; | |
11a1ca35 | 1294 | pr_debug("name:%s ", arg->name); |
48481938 MH |
1295 | str = tmp + 1; |
1296 | } | |
1297 | ||
11a1ca35 MH |
1298 | tmp = strchr(str, ':'); |
1299 | if (tmp) { /* Type setting */ | |
1300 | *tmp = '\0'; | |
02b95dad MH |
1301 | arg->type = strdup(tmp + 1); |
1302 | if (arg->type == NULL) | |
1303 | return -ENOMEM; | |
11a1ca35 MH |
1304 | pr_debug("type:%s ", arg->type); |
1305 | } | |
1306 | ||
b2a3c12b | 1307 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
1308 | if (!is_c_varname(str) || !tmp) { |
1309 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
1310 | arg->var = strdup(str); |
1311 | if (arg->var == NULL) | |
1312 | return -ENOMEM; | |
48481938 | 1313 | pr_debug("%s\n", arg->var); |
146a1439 | 1314 | return 0; |
7df2f329 MH |
1315 | } |
1316 | ||
b2a3c12b | 1317 | /* Structure fields or array element */ |
02b95dad MH |
1318 | arg->var = strndup(str, tmp - str); |
1319 | if (arg->var == NULL) | |
1320 | return -ENOMEM; | |
b2a3c12b | 1321 | goodname = arg->var; |
48481938 | 1322 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
1323 | fieldp = &arg->field; |
1324 | ||
1325 | do { | |
e334016f MH |
1326 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
1327 | if (*fieldp == NULL) | |
1328 | return -ENOMEM; | |
b2a3c12b MH |
1329 | if (*tmp == '[') { /* Array */ |
1330 | str = tmp; | |
1331 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 1332 | (*fieldp)->ref = true; |
b2a3c12b MH |
1333 | if (*tmp != ']' || tmp == str + 1) { |
1334 | semantic_error("Array index must be a" | |
1335 | " number.\n"); | |
1336 | return -EINVAL; | |
1337 | } | |
1338 | tmp++; | |
1339 | if (*tmp == '\0') | |
1340 | tmp = NULL; | |
1341 | } else { /* Structure */ | |
1342 | if (*tmp == '.') { | |
1343 | str = tmp + 1; | |
1344 | (*fieldp)->ref = false; | |
1345 | } else if (tmp[1] == '>') { | |
1346 | str = tmp + 2; | |
1347 | (*fieldp)->ref = true; | |
1348 | } else { | |
1349 | semantic_error("Argument parse error: %s\n", | |
1350 | str); | |
1351 | return -EINVAL; | |
1352 | } | |
1353 | tmp = strpbrk(str, "-.["); | |
146a1439 | 1354 | } |
7df2f329 | 1355 | if (tmp) { |
02b95dad MH |
1356 | (*fieldp)->name = strndup(str, tmp - str); |
1357 | if ((*fieldp)->name == NULL) | |
1358 | return -ENOMEM; | |
b2a3c12b MH |
1359 | if (*str != '[') |
1360 | goodname = (*fieldp)->name; | |
7df2f329 MH |
1361 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
1362 | fieldp = &(*fieldp)->next; | |
1363 | } | |
1364 | } while (tmp); | |
02b95dad MH |
1365 | (*fieldp)->name = strdup(str); |
1366 | if ((*fieldp)->name == NULL) | |
1367 | return -ENOMEM; | |
b2a3c12b MH |
1368 | if (*str != '[') |
1369 | goodname = (*fieldp)->name; | |
7df2f329 | 1370 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 1371 | |
b2a3c12b | 1372 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 1373 | if (!arg->name) { |
b2a3c12b | 1374 | arg->name = strdup(goodname); |
02b95dad MH |
1375 | if (arg->name == NULL) |
1376 | return -ENOMEM; | |
1377 | } | |
146a1439 | 1378 | return 0; |
7df2f329 MH |
1379 | } |
1380 | ||
4235b045 | 1381 | /* Parse perf-probe event command */ |
146a1439 | 1382 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1383 | { |
e1c01d61 | 1384 | char **argv; |
146a1439 | 1385 | int argc, i, ret = 0; |
fac13fd5 | 1386 | |
4235b045 | 1387 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1388 | if (!argv) { |
1389 | pr_debug("Failed to split arguments.\n"); | |
1390 | return -ENOMEM; | |
1391 | } | |
1392 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1393 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1394 | ret = -ERANGE; | |
1395 | goto out; | |
1396 | } | |
50656eec | 1397 | /* Parse probe point */ |
146a1439 MH |
1398 | ret = parse_perf_probe_point(argv[0], pev); |
1399 | if (ret < 0) | |
1400 | goto out; | |
50656eec | 1401 | |
e1c01d61 | 1402 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1403 | pev->nargs = argc - 1; |
e334016f MH |
1404 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1405 | if (pev->args == NULL) { | |
1406 | ret = -ENOMEM; | |
1407 | goto out; | |
1408 | } | |
146a1439 MH |
1409 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1410 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1411 | if (ret >= 0 && | |
1412 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1413 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1414 | " kretprobe.\n"); |
1415 | ret = -EINVAL; | |
1416 | } | |
e1c01d61 | 1417 | } |
146a1439 | 1418 | out: |
e1c01d61 | 1419 | argv_free(argv); |
146a1439 MH |
1420 | |
1421 | return ret; | |
50656eec MH |
1422 | } |
1423 | ||
4235b045 MH |
1424 | /* Return true if this perf_probe_event requires debuginfo */ |
1425 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1426 | { | |
1427 | int i; | |
1428 | ||
1429 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
1430 | return true; | |
1431 | ||
1432 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 1433 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
1434 | return true; |
1435 | ||
1436 | return false; | |
1437 | } | |
1438 | ||
0e60836b SD |
1439 | /* Parse probe_events event into struct probe_point */ |
1440 | static int parse_probe_trace_command(const char *cmd, | |
190b57fc | 1441 | struct probe_trace_event *tev) |
4de189fe | 1442 | { |
0e60836b | 1443 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1444 | char pr; |
1445 | char *p; | |
bcbd0040 | 1446 | char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str; |
4de189fe MH |
1447 | int ret, i, argc; |
1448 | char **argv; | |
1449 | ||
0e60836b | 1450 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1451 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1452 | if (!argv) { |
1453 | pr_debug("Failed to split arguments.\n"); | |
1454 | return -ENOMEM; | |
1455 | } | |
1456 | if (argc < 2) { | |
1457 | semantic_error("Too few probe arguments.\n"); | |
1458 | ret = -ERANGE; | |
1459 | goto out; | |
1460 | } | |
4de189fe MH |
1461 | |
1462 | /* Scan event and group name. */ | |
bcbd0040 IT |
1463 | argv0_str = strdup(argv[0]); |
1464 | if (argv0_str == NULL) { | |
1465 | ret = -ENOMEM; | |
1466 | goto out; | |
1467 | } | |
1468 | fmt1_str = strtok_r(argv0_str, ":", &fmt); | |
1469 | fmt2_str = strtok_r(NULL, "/", &fmt); | |
1470 | fmt3_str = strtok_r(NULL, " \t", &fmt); | |
1471 | if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL | |
1472 | || fmt3_str == NULL) { | |
146a1439 MH |
1473 | semantic_error("Failed to parse event name: %s\n", argv[0]); |
1474 | ret = -EINVAL; | |
1475 | goto out; | |
1476 | } | |
bcbd0040 IT |
1477 | pr = fmt1_str[0]; |
1478 | tev->group = strdup(fmt2_str); | |
1479 | tev->event = strdup(fmt3_str); | |
1480 | if (tev->group == NULL || tev->event == NULL) { | |
1481 | ret = -ENOMEM; | |
1482 | goto out; | |
1483 | } | |
4235b045 | 1484 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1485 | |
4235b045 | 1486 | tp->retprobe = (pr == 'r'); |
4de189fe | 1487 | |
190b57fc MH |
1488 | /* Scan module name(if there), function name and offset */ |
1489 | p = strchr(argv[1], ':'); | |
1490 | if (p) { | |
1491 | tp->module = strndup(argv[1], p - argv[1]); | |
1492 | p++; | |
1493 | } else | |
1494 | p = argv[1]; | |
bcbd0040 | 1495 | fmt1_str = strtok_r(p, "+", &fmt); |
5a6f6314 MH |
1496 | if (fmt1_str[0] == '0') /* only the address started with 0x */ |
1497 | tp->address = strtoul(fmt1_str, NULL, 0); | |
1498 | else { | |
1499 | /* Only the symbol-based probe has offset */ | |
1500 | tp->symbol = strdup(fmt1_str); | |
1501 | if (tp->symbol == NULL) { | |
1502 | ret = -ENOMEM; | |
1503 | goto out; | |
1504 | } | |
1505 | fmt2_str = strtok_r(NULL, "", &fmt); | |
1506 | if (fmt2_str == NULL) | |
1507 | tp->offset = 0; | |
1508 | else | |
1509 | tp->offset = strtoul(fmt2_str, NULL, 10); | |
bcbd0040 | 1510 | } |
4de189fe | 1511 | |
4235b045 | 1512 | tev->nargs = argc - 2; |
0e60836b | 1513 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1514 | if (tev->args == NULL) { |
1515 | ret = -ENOMEM; | |
1516 | goto out; | |
1517 | } | |
4235b045 | 1518 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1519 | p = strchr(argv[i + 2], '='); |
1520 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1521 | *p++ = '\0'; |
1522 | else | |
1523 | p = argv[i + 2]; | |
02b95dad | 1524 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1525 | /* TODO: parse regs and offset */ |
02b95dad MH |
1526 | tev->args[i].value = strdup(p); |
1527 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1528 | ret = -ENOMEM; | |
1529 | goto out; | |
1530 | } | |
4de189fe | 1531 | } |
146a1439 MH |
1532 | ret = 0; |
1533 | out: | |
bcbd0040 | 1534 | free(argv0_str); |
4de189fe | 1535 | argv_free(argv); |
146a1439 | 1536 | return ret; |
4de189fe MH |
1537 | } |
1538 | ||
7df2f329 MH |
1539 | /* Compose only probe arg */ |
1540 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
1541 | { | |
1542 | struct perf_probe_arg_field *field = pa->field; | |
1543 | int ret; | |
1544 | char *tmp = buf; | |
1545 | ||
48481938 MH |
1546 | if (pa->name && pa->var) |
1547 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
1548 | else | |
1549 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
1550 | if (ret <= 0) |
1551 | goto error; | |
1552 | tmp += ret; | |
1553 | len -= ret; | |
1554 | ||
1555 | while (field) { | |
b2a3c12b MH |
1556 | if (field->name[0] == '[') |
1557 | ret = e_snprintf(tmp, len, "%s", field->name); | |
1558 | else | |
1559 | ret = e_snprintf(tmp, len, "%s%s", | |
1560 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
1561 | if (ret <= 0) |
1562 | goto error; | |
1563 | tmp += ret; | |
1564 | len -= ret; | |
1565 | field = field->next; | |
1566 | } | |
11a1ca35 MH |
1567 | |
1568 | if (pa->type) { | |
1569 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
1570 | if (ret <= 0) | |
1571 | goto error; | |
1572 | tmp += ret; | |
1573 | len -= ret; | |
1574 | } | |
1575 | ||
7df2f329 MH |
1576 | return tmp - buf; |
1577 | error: | |
5f03cba4 | 1578 | pr_debug("Failed to synthesize perf probe argument: %d\n", ret); |
146a1439 | 1579 | return ret; |
7df2f329 MH |
1580 | } |
1581 | ||
4235b045 MH |
1582 | /* Compose only probe point (not argument) */ |
1583 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1584 | { |
fb1587d8 MH |
1585 | char *buf, *tmp; |
1586 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1587 | int ret, len; | |
4de189fe | 1588 | |
e334016f MH |
1589 | buf = zalloc(MAX_CMDLEN); |
1590 | if (buf == NULL) { | |
1591 | ret = -ENOMEM; | |
1592 | goto error; | |
1593 | } | |
4de189fe | 1594 | if (pp->offset) { |
fb1587d8 | 1595 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1596 | if (ret <= 0) |
1597 | goto error; | |
1598 | } | |
1599 | if (pp->line) { | |
fb1587d8 MH |
1600 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1601 | if (ret <= 0) | |
1602 | goto error; | |
1603 | } | |
1604 | if (pp->file) { | |
32ae2ade FBH |
1605 | tmp = pp->file; |
1606 | len = strlen(tmp); | |
1607 | if (len > 30) { | |
1608 | tmp = strchr(pp->file + len - 30, '/'); | |
1609 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1610 | } | |
1611 | ret = e_snprintf(file, 32, "@%s", tmp); | |
4de189fe MH |
1612 | if (ret <= 0) |
1613 | goto error; | |
1614 | } | |
1615 | ||
1616 | if (pp->function) | |
fb1587d8 MH |
1617 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1618 | offs, pp->retprobe ? "%return" : "", line, | |
1619 | file); | |
4de189fe | 1620 | else |
fb1587d8 | 1621 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1622 | if (ret <= 0) |
1623 | goto error; | |
1624 | ||
1625 | return buf; | |
7ef17aaf | 1626 | error: |
5f03cba4 | 1627 | pr_debug("Failed to synthesize perf probe point: %d\n", ret); |
f5385650 | 1628 | free(buf); |
146a1439 | 1629 | return NULL; |
7ef17aaf MH |
1630 | } |
1631 | ||
4235b045 MH |
1632 | #if 0 |
1633 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1634 | { |
1635 | char *buf; | |
1636 | int i, len, ret; | |
1637 | ||
4235b045 MH |
1638 | buf = synthesize_perf_probe_point(&pev->point); |
1639 | if (!buf) | |
1640 | return NULL; | |
4de189fe | 1641 | |
4235b045 MH |
1642 | len = strlen(buf); |
1643 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1644 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1645 | pev->args[i].name); |
1646 | if (ret <= 0) { | |
1647 | free(buf); | |
1648 | return NULL; | |
1649 | } | |
4de189fe MH |
1650 | len += ret; |
1651 | } | |
4de189fe | 1652 | |
4235b045 MH |
1653 | return buf; |
1654 | } | |
1655 | #endif | |
1656 | ||
0e60836b | 1657 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1658 | char **buf, size_t *buflen, |
1659 | int depth) | |
1660 | { | |
1661 | int ret; | |
1662 | if (ref->next) { | |
0e60836b | 1663 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1664 | buflen, depth + 1); |
1665 | if (depth < 0) | |
1666 | goto out; | |
1667 | } | |
1668 | ||
1669 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1670 | if (ret < 0) | |
1671 | depth = ret; | |
1672 | else { | |
1673 | *buf += ret; | |
1674 | *buflen -= ret; | |
1675 | } | |
1676 | out: | |
1677 | return depth; | |
4de189fe | 1678 | |
4de189fe MH |
1679 | } |
1680 | ||
0e60836b | 1681 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1682 | char *buf, size_t buflen) |
50656eec | 1683 | { |
0e60836b | 1684 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1685 | int ret, depth = 0; |
1686 | char *tmp = buf; | |
1687 | ||
1688 | /* Argument name or separator */ | |
1689 | if (arg->name) | |
1690 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1691 | else | |
1692 | ret = e_snprintf(buf, buflen, " "); | |
1693 | if (ret < 0) | |
1694 | return ret; | |
1695 | buf += ret; | |
1696 | buflen -= ret; | |
1697 | ||
b7dcb857 MH |
1698 | /* Special case: @XXX */ |
1699 | if (arg->value[0] == '@' && arg->ref) | |
1700 | ref = ref->next; | |
1701 | ||
4235b045 | 1702 | /* Dereferencing arguments */ |
b7dcb857 | 1703 | if (ref) { |
0e60836b | 1704 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1705 | &buflen, 1); |
1706 | if (depth < 0) | |
1707 | return depth; | |
1708 | } | |
1709 | ||
1710 | /* Print argument value */ | |
b7dcb857 MH |
1711 | if (arg->value[0] == '@' && arg->ref) |
1712 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1713 | arg->ref->offset); | |
1714 | else | |
1715 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1716 | if (ret < 0) |
1717 | return ret; | |
1718 | buf += ret; | |
1719 | buflen -= ret; | |
1720 | ||
1721 | /* Closing */ | |
1722 | while (depth--) { | |
1723 | ret = e_snprintf(buf, buflen, ")"); | |
1724 | if (ret < 0) | |
1725 | return ret; | |
1726 | buf += ret; | |
1727 | buflen -= ret; | |
1728 | } | |
4984912e MH |
1729 | /* Print argument type */ |
1730 | if (arg->type) { | |
1731 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1732 | if (ret <= 0) | |
1733 | return ret; | |
1734 | buf += ret; | |
1735 | } | |
4235b045 MH |
1736 | |
1737 | return buf - tmp; | |
1738 | } | |
1739 | ||
0e60836b | 1740 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1741 | { |
0e60836b | 1742 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1743 | char *buf; |
1744 | int i, len, ret; | |
1745 | ||
e334016f MH |
1746 | buf = zalloc(MAX_CMDLEN); |
1747 | if (buf == NULL) | |
1748 | return NULL; | |
1749 | ||
eb948e50 MH |
1750 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s ", tp->retprobe ? 'r' : 'p', |
1751 | tev->group, tev->event); | |
1752 | if (len <= 0) | |
1753 | goto error; | |
1754 | ||
1755 | /* Uprobes must have tp->address and tp->module */ | |
1756 | if (tev->uprobes && (!tp->address || !tp->module)) | |
1757 | goto error; | |
1758 | ||
1759 | /* Use the tp->address for uprobes */ | |
225466f1 | 1760 | if (tev->uprobes) |
eb948e50 MH |
1761 | ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s:0x%lx", |
1762 | tp->module, tp->address); | |
225466f1 | 1763 | else |
eb948e50 | 1764 | ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s%s%s+%lu", |
225466f1 SD |
1765 | tp->module ?: "", tp->module ? ":" : "", |
1766 | tp->symbol, tp->offset); | |
1767 | ||
eb948e50 | 1768 | if (ret <= 0) |
50656eec | 1769 | goto error; |
eb948e50 | 1770 | len += ret; |
50656eec | 1771 | |
4235b045 | 1772 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1773 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1774 | MAX_CMDLEN - len); |
4de189fe | 1775 | if (ret <= 0) |
50656eec MH |
1776 | goto error; |
1777 | len += ret; | |
1778 | } | |
50656eec | 1779 | |
4235b045 | 1780 | return buf; |
50656eec | 1781 | error: |
4235b045 MH |
1782 | free(buf); |
1783 | return NULL; | |
1784 | } | |
50656eec | 1785 | |
5a6f6314 MH |
1786 | static int find_perf_probe_point_from_map(struct probe_trace_point *tp, |
1787 | struct perf_probe_point *pp, | |
1788 | bool is_kprobe) | |
1789 | { | |
1790 | struct symbol *sym = NULL; | |
1791 | struct map *map; | |
1792 | u64 addr; | |
1793 | int ret = -ENOENT; | |
1794 | ||
1795 | if (!is_kprobe) { | |
1796 | map = dso__new_map(tp->module); | |
1797 | if (!map) | |
1798 | goto out; | |
1799 | addr = tp->address; | |
1800 | sym = map__find_symbol(map, addr, NULL); | |
1801 | } else { | |
1802 | addr = kernel_get_symbol_address_by_name(tp->symbol, true); | |
1803 | if (addr) { | |
1804 | addr += tp->offset; | |
1805 | sym = __find_kernel_function(addr, &map); | |
1806 | } | |
1807 | } | |
1808 | if (!sym) | |
1809 | goto out; | |
1810 | ||
1811 | pp->retprobe = tp->retprobe; | |
1812 | pp->offset = addr - map->unmap_ip(map, sym->start); | |
1813 | pp->function = strdup(sym->name); | |
1814 | ret = pp->function ? 0 : -ENOMEM; | |
1815 | ||
1816 | out: | |
1817 | if (map && !is_kprobe) { | |
1818 | dso__delete(map->dso); | |
1819 | map__delete(map); | |
1820 | } | |
1821 | ||
1822 | return ret; | |
1823 | } | |
1824 | ||
1825 | static int convert_to_perf_probe_point(struct probe_trace_point *tp, | |
1826 | struct perf_probe_point *pp, | |
1827 | bool is_kprobe) | |
1828 | { | |
1829 | char buf[128]; | |
1830 | int ret; | |
1831 | ||
1832 | ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe); | |
1833 | if (!ret) | |
1834 | return 0; | |
1835 | ret = find_perf_probe_point_from_map(tp, pp, is_kprobe); | |
1836 | if (!ret) | |
1837 | return 0; | |
1838 | ||
1839 | pr_debug("Failed to find probe point from both of dwarf and map.\n"); | |
1840 | ||
1841 | if (tp->symbol) { | |
1842 | pp->function = strdup(tp->symbol); | |
1843 | pp->offset = tp->offset; | |
1844 | } else if (!tp->module && !is_kprobe) { | |
1845 | ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address); | |
1846 | if (ret < 0) | |
1847 | return ret; | |
1848 | pp->function = strdup(buf); | |
1849 | pp->offset = 0; | |
1850 | } | |
1851 | if (pp->function == NULL) | |
1852 | return -ENOMEM; | |
1853 | ||
1854 | pp->retprobe = tp->retprobe; | |
1855 | ||
1856 | return 0; | |
1857 | } | |
1858 | ||
0e60836b | 1859 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
225466f1 | 1860 | struct perf_probe_event *pev, bool is_kprobe) |
4235b045 | 1861 | { |
02b95dad | 1862 | char buf[64] = ""; |
146a1439 | 1863 | int i, ret; |
4235b045 | 1864 | |
4b4da7f7 | 1865 | /* Convert event/group name */ |
02b95dad MH |
1866 | pev->event = strdup(tev->event); |
1867 | pev->group = strdup(tev->group); | |
1868 | if (pev->event == NULL || pev->group == NULL) | |
1869 | return -ENOMEM; | |
fb1587d8 | 1870 | |
4b4da7f7 | 1871 | /* Convert trace_point to probe_point */ |
5a6f6314 | 1872 | ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe); |
146a1439 MH |
1873 | if (ret < 0) |
1874 | return ret; | |
4b4da7f7 | 1875 | |
4235b045 MH |
1876 | /* Convert trace_arg to probe_arg */ |
1877 | pev->nargs = tev->nargs; | |
e334016f MH |
1878 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1879 | if (pev->args == NULL) | |
1880 | return -ENOMEM; | |
02b95dad | 1881 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1882 | if (tev->args[i].name) |
02b95dad | 1883 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1884 | else { |
0e60836b | 1885 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1886 | buf, 64); |
02b95dad | 1887 | pev->args[i].name = strdup(buf); |
4235b045 | 1888 | } |
02b95dad MH |
1889 | if (pev->args[i].name == NULL && ret >= 0) |
1890 | ret = -ENOMEM; | |
1891 | } | |
146a1439 MH |
1892 | |
1893 | if (ret < 0) | |
1894 | clear_perf_probe_event(pev); | |
1895 | ||
1896 | return ret; | |
4235b045 MH |
1897 | } |
1898 | ||
1899 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1900 | { | |
7df2f329 | 1901 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1902 | int i; |
1903 | ||
f5385650 ACM |
1904 | free(pev->event); |
1905 | free(pev->group); | |
9b118aca | 1906 | clear_perf_probe_point(&pev->point); |
f5385650 | 1907 | |
7df2f329 | 1908 | for (i = 0; i < pev->nargs; i++) { |
f5385650 ACM |
1909 | free(pev->args[i].name); |
1910 | free(pev->args[i].var); | |
1911 | free(pev->args[i].type); | |
7df2f329 MH |
1912 | field = pev->args[i].field; |
1913 | while (field) { | |
1914 | next = field->next; | |
74cf249d | 1915 | zfree(&field->name); |
7df2f329 MH |
1916 | free(field); |
1917 | field = next; | |
1918 | } | |
1919 | } | |
f5385650 | 1920 | free(pev->args); |
4235b045 MH |
1921 | memset(pev, 0, sizeof(*pev)); |
1922 | } | |
1923 | ||
0e60836b | 1924 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1925 | { |
0e60836b | 1926 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1927 | int i; |
1928 | ||
f5385650 ACM |
1929 | free(tev->event); |
1930 | free(tev->group); | |
1931 | free(tev->point.symbol); | |
1932 | free(tev->point.module); | |
4235b045 | 1933 | for (i = 0; i < tev->nargs; i++) { |
f5385650 ACM |
1934 | free(tev->args[i].name); |
1935 | free(tev->args[i].value); | |
1936 | free(tev->args[i].type); | |
4235b045 MH |
1937 | ref = tev->args[i].ref; |
1938 | while (ref) { | |
1939 | next = ref->next; | |
1940 | free(ref); | |
1941 | ref = next; | |
1942 | } | |
1943 | } | |
f5385650 | 1944 | free(tev->args); |
4235b045 | 1945 | memset(tev, 0, sizeof(*tev)); |
50656eec MH |
1946 | } |
1947 | ||
5e45187c | 1948 | static void print_open_warning(int err, bool is_kprobe) |
225466f1 | 1949 | { |
5f03cba4 | 1950 | char sbuf[STRERR_BUFSIZE]; |
225466f1 | 1951 | |
5e45187c | 1952 | if (err == -ENOENT) { |
225466f1 SD |
1953 | const char *config; |
1954 | ||
1955 | if (!is_kprobe) | |
1956 | config = "CONFIG_UPROBE_EVENTS"; | |
1957 | else | |
1958 | config = "CONFIG_KPROBE_EVENTS"; | |
1959 | ||
5e45187c MH |
1960 | pr_warning("%cprobe_events file does not exist" |
1961 | " - please rebuild kernel with %s.\n", | |
1962 | is_kprobe ? 'k' : 'u', config); | |
1963 | } else if (err == -ENOTSUP) | |
23773ca1 | 1964 | pr_warning("Tracefs or debugfs is not mounted.\n"); |
5e45187c MH |
1965 | else |
1966 | pr_warning("Failed to open %cprobe_events: %s\n", | |
1967 | is_kprobe ? 'k' : 'u', | |
1968 | strerror_r(-err, sbuf, sizeof(sbuf))); | |
225466f1 SD |
1969 | } |
1970 | ||
467ec085 MH |
1971 | static void print_both_open_warning(int kerr, int uerr) |
1972 | { | |
1973 | /* Both kprobes and uprobes are disabled, warn it. */ | |
1974 | if (kerr == -ENOTSUP && uerr == -ENOTSUP) | |
23773ca1 | 1975 | pr_warning("Tracefs or debugfs is not mounted.\n"); |
467ec085 MH |
1976 | else if (kerr == -ENOENT && uerr == -ENOENT) |
1977 | pr_warning("Please rebuild kernel with CONFIG_KPROBE_EVENTS " | |
1978 | "or/and CONFIG_UPROBE_EVENTS.\n"); | |
1979 | else { | |
5f03cba4 | 1980 | char sbuf[STRERR_BUFSIZE]; |
467ec085 MH |
1981 | pr_warning("Failed to open kprobe events: %s.\n", |
1982 | strerror_r(-kerr, sbuf, sizeof(sbuf))); | |
1983 | pr_warning("Failed to open uprobe events: %s.\n", | |
1984 | strerror_r(-uerr, sbuf, sizeof(sbuf))); | |
1985 | } | |
1986 | } | |
1987 | ||
5e45187c | 1988 | static int open_probe_events(const char *trace_file, bool readwrite) |
4de189fe MH |
1989 | { |
1990 | char buf[PATH_MAX]; | |
7ca5989d | 1991 | const char *__debugfs; |
23773ca1 | 1992 | const char *tracing_dir = ""; |
4de189fe MH |
1993 | int ret; |
1994 | ||
23773ca1 SRRH |
1995 | __debugfs = tracefs_find_mountpoint(); |
1996 | if (__debugfs == NULL) { | |
1997 | tracing_dir = "tracing/"; | |
7ca5989d | 1998 | |
23773ca1 SRRH |
1999 | __debugfs = debugfs_find_mountpoint(); |
2000 | if (__debugfs == NULL) | |
2001 | return -ENOTSUP; | |
2002 | } | |
2003 | ||
2004 | ret = e_snprintf(buf, PATH_MAX, "%s/%s%s", | |
2005 | __debugfs, tracing_dir, trace_file); | |
146a1439 | 2006 | if (ret >= 0) { |
7ca5989d | 2007 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
2008 | if (readwrite && !probe_event_dry_run) |
2009 | ret = open(buf, O_RDWR, O_APPEND); | |
2010 | else | |
2011 | ret = open(buf, O_RDONLY, 0); | |
f4d7da49 | 2012 | |
225466f1 | 2013 | if (ret < 0) |
5e45187c | 2014 | ret = -errno; |
4de189fe MH |
2015 | } |
2016 | return ret; | |
2017 | } | |
2018 | ||
225466f1 SD |
2019 | static int open_kprobe_events(bool readwrite) |
2020 | { | |
23773ca1 | 2021 | return open_probe_events("kprobe_events", readwrite); |
225466f1 SD |
2022 | } |
2023 | ||
2024 | static int open_uprobe_events(bool readwrite) | |
2025 | { | |
23773ca1 | 2026 | return open_probe_events("uprobe_events", readwrite); |
225466f1 SD |
2027 | } |
2028 | ||
2029 | /* Get raw string list of current kprobe_events or uprobe_events */ | |
0e60836b | 2030 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
2031 | { |
2032 | int ret, idx; | |
2033 | FILE *fp; | |
2034 | char buf[MAX_CMDLEN]; | |
2035 | char *p; | |
2036 | struct strlist *sl; | |
2037 | ||
2038 | sl = strlist__new(true, NULL); | |
2039 | ||
2040 | fp = fdopen(dup(fd), "r"); | |
2041 | while (!feof(fp)) { | |
2042 | p = fgets(buf, MAX_CMDLEN, fp); | |
2043 | if (!p) | |
2044 | break; | |
2045 | ||
2046 | idx = strlen(p) - 1; | |
2047 | if (p[idx] == '\n') | |
2048 | p[idx] = '\0'; | |
2049 | ret = strlist__add(sl, buf); | |
146a1439 | 2050 | if (ret < 0) { |
6eb08660 | 2051 | pr_debug("strlist__add failed (%d)\n", ret); |
146a1439 MH |
2052 | strlist__delete(sl); |
2053 | return NULL; | |
2054 | } | |
4de189fe MH |
2055 | } |
2056 | fclose(fp); | |
2057 | ||
2058 | return sl; | |
2059 | } | |
2060 | ||
9aaf5a5f MH |
2061 | struct kprobe_blacklist_node { |
2062 | struct list_head list; | |
2063 | unsigned long start; | |
2064 | unsigned long end; | |
2065 | char *symbol; | |
2066 | }; | |
2067 | ||
2068 | static void kprobe_blacklist__delete(struct list_head *blacklist) | |
2069 | { | |
2070 | struct kprobe_blacklist_node *node; | |
2071 | ||
2072 | while (!list_empty(blacklist)) { | |
2073 | node = list_first_entry(blacklist, | |
2074 | struct kprobe_blacklist_node, list); | |
2075 | list_del(&node->list); | |
2076 | free(node->symbol); | |
2077 | free(node); | |
2078 | } | |
2079 | } | |
2080 | ||
2081 | static int kprobe_blacklist__load(struct list_head *blacklist) | |
2082 | { | |
2083 | struct kprobe_blacklist_node *node; | |
2084 | const char *__debugfs = debugfs_find_mountpoint(); | |
2085 | char buf[PATH_MAX], *p; | |
2086 | FILE *fp; | |
2087 | int ret; | |
2088 | ||
2089 | if (__debugfs == NULL) | |
2090 | return -ENOTSUP; | |
2091 | ||
2092 | ret = e_snprintf(buf, PATH_MAX, "%s/kprobes/blacklist", __debugfs); | |
2093 | if (ret < 0) | |
2094 | return ret; | |
2095 | ||
2096 | fp = fopen(buf, "r"); | |
2097 | if (!fp) | |
2098 | return -errno; | |
2099 | ||
2100 | ret = 0; | |
2101 | while (fgets(buf, PATH_MAX, fp)) { | |
2102 | node = zalloc(sizeof(*node)); | |
2103 | if (!node) { | |
2104 | ret = -ENOMEM; | |
2105 | break; | |
2106 | } | |
2107 | INIT_LIST_HEAD(&node->list); | |
2108 | list_add_tail(&node->list, blacklist); | |
2109 | if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) { | |
2110 | ret = -EINVAL; | |
2111 | break; | |
2112 | } | |
2113 | p = strchr(buf, '\t'); | |
2114 | if (p) { | |
2115 | p++; | |
2116 | if (p[strlen(p) - 1] == '\n') | |
2117 | p[strlen(p) - 1] = '\0'; | |
2118 | } else | |
2119 | p = (char *)"unknown"; | |
2120 | node->symbol = strdup(p); | |
2121 | if (!node->symbol) { | |
2122 | ret = -ENOMEM; | |
2123 | break; | |
2124 | } | |
2125 | pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n", | |
2126 | node->start, node->end, node->symbol); | |
2127 | ret++; | |
2128 | } | |
2129 | if (ret < 0) | |
2130 | kprobe_blacklist__delete(blacklist); | |
2131 | fclose(fp); | |
2132 | ||
2133 | return ret; | |
2134 | } | |
2135 | ||
2136 | static struct kprobe_blacklist_node * | |
2137 | kprobe_blacklist__find_by_address(struct list_head *blacklist, | |
2138 | unsigned long address) | |
2139 | { | |
2140 | struct kprobe_blacklist_node *node; | |
2141 | ||
2142 | list_for_each_entry(node, blacklist, list) { | |
2143 | if (node->start <= address && address <= node->end) | |
2144 | return node; | |
2145 | } | |
2146 | ||
2147 | return NULL; | |
2148 | } | |
2149 | ||
278498d4 | 2150 | /* Show an event */ |
fb226ccd MH |
2151 | static int show_perf_probe_event(struct perf_probe_event *pev, |
2152 | const char *module) | |
278498d4 | 2153 | { |
7e990a51 | 2154 | int i, ret; |
278498d4 | 2155 | char buf[128]; |
4235b045 | 2156 | char *place; |
278498d4 | 2157 | |
4235b045 MH |
2158 | /* Synthesize only event probe point */ |
2159 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
2160 | if (!place) |
2161 | return -EINVAL; | |
4235b045 MH |
2162 | |
2163 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 2164 | if (ret < 0) |
146a1439 MH |
2165 | return ret; |
2166 | ||
5e17b28f | 2167 | pr_info(" %-20s (on %s", buf, place); |
fb226ccd | 2168 | if (module) |
5e17b28f | 2169 | pr_info(" in %s", module); |
278498d4 | 2170 | |
4235b045 | 2171 | if (pev->nargs > 0) { |
5e17b28f | 2172 | pr_info(" with"); |
7df2f329 | 2173 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
2174 | ret = synthesize_perf_probe_arg(&pev->args[i], |
2175 | buf, 128); | |
2176 | if (ret < 0) | |
2177 | break; | |
5e17b28f | 2178 | pr_info(" %s", buf); |
7df2f329 | 2179 | } |
278498d4 | 2180 | } |
5e17b28f | 2181 | pr_info(")\n"); |
4235b045 | 2182 | free(place); |
146a1439 | 2183 | return ret; |
278498d4 MH |
2184 | } |
2185 | ||
225466f1 | 2186 | static int __show_perf_probe_events(int fd, bool is_kprobe) |
4de189fe | 2187 | { |
225466f1 | 2188 | int ret = 0; |
0e60836b | 2189 | struct probe_trace_event tev; |
4235b045 | 2190 | struct perf_probe_event pev; |
4de189fe MH |
2191 | struct strlist *rawlist; |
2192 | struct str_node *ent; | |
2193 | ||
4235b045 MH |
2194 | memset(&tev, 0, sizeof(tev)); |
2195 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 2196 | |
0e60836b | 2197 | rawlist = get_probe_trace_command_rawlist(fd); |
146a1439 | 2198 | if (!rawlist) |
6eb08660 | 2199 | return -ENOMEM; |
4de189fe | 2200 | |
adf365f4 | 2201 | strlist__for_each(ent, rawlist) { |
0e60836b | 2202 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 | 2203 | if (ret >= 0) { |
225466f1 SD |
2204 | ret = convert_to_perf_probe_event(&tev, &pev, |
2205 | is_kprobe); | |
146a1439 | 2206 | if (ret >= 0) |
fb226ccd MH |
2207 | ret = show_perf_probe_event(&pev, |
2208 | tev.point.module); | |
146a1439 | 2209 | } |
4235b045 | 2210 | clear_perf_probe_event(&pev); |
0e60836b | 2211 | clear_probe_trace_event(&tev); |
146a1439 MH |
2212 | if (ret < 0) |
2213 | break; | |
4de189fe | 2214 | } |
4de189fe | 2215 | strlist__delete(rawlist); |
146a1439 MH |
2216 | |
2217 | return ret; | |
4de189fe MH |
2218 | } |
2219 | ||
225466f1 SD |
2220 | /* List up current perf-probe events */ |
2221 | int show_perf_probe_events(void) | |
2222 | { | |
5e45187c | 2223 | int kp_fd, up_fd, ret; |
225466f1 SD |
2224 | |
2225 | setup_pager(); | |
225466f1 | 2226 | |
ee45b6c2 | 2227 | ret = init_symbol_maps(false); |
225466f1 SD |
2228 | if (ret < 0) |
2229 | return ret; | |
2230 | ||
5e45187c MH |
2231 | kp_fd = open_kprobe_events(false); |
2232 | if (kp_fd >= 0) { | |
2233 | ret = __show_perf_probe_events(kp_fd, true); | |
2234 | close(kp_fd); | |
2235 | if (ret < 0) | |
2236 | goto out; | |
2237 | } | |
225466f1 | 2238 | |
5e45187c MH |
2239 | up_fd = open_uprobe_events(false); |
2240 | if (kp_fd < 0 && up_fd < 0) { | |
467ec085 | 2241 | print_both_open_warning(kp_fd, up_fd); |
5e45187c MH |
2242 | ret = kp_fd; |
2243 | goto out; | |
225466f1 SD |
2244 | } |
2245 | ||
5e45187c MH |
2246 | if (up_fd >= 0) { |
2247 | ret = __show_perf_probe_events(up_fd, false); | |
2248 | close(up_fd); | |
2249 | } | |
2250 | out: | |
ee45b6c2 | 2251 | exit_symbol_maps(); |
225466f1 SD |
2252 | return ret; |
2253 | } | |
2254 | ||
b498ce1f | 2255 | /* Get current perf-probe event names */ |
0e60836b | 2256 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 2257 | { |
fa28244d | 2258 | char buf[128]; |
b498ce1f MH |
2259 | struct strlist *sl, *rawlist; |
2260 | struct str_node *ent; | |
0e60836b | 2261 | struct probe_trace_event tev; |
146a1439 | 2262 | int ret = 0; |
b498ce1f | 2263 | |
4235b045 | 2264 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 2265 | rawlist = get_probe_trace_command_rawlist(fd); |
6eb08660 MH |
2266 | if (!rawlist) |
2267 | return NULL; | |
e1d2017b | 2268 | sl = strlist__new(true, NULL); |
adf365f4 | 2269 | strlist__for_each(ent, rawlist) { |
0e60836b | 2270 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
2271 | if (ret < 0) |
2272 | break; | |
fa28244d | 2273 | if (include_group) { |
146a1439 MH |
2274 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
2275 | tev.event); | |
2276 | if (ret >= 0) | |
2277 | ret = strlist__add(sl, buf); | |
fa28244d | 2278 | } else |
146a1439 | 2279 | ret = strlist__add(sl, tev.event); |
0e60836b | 2280 | clear_probe_trace_event(&tev); |
146a1439 MH |
2281 | if (ret < 0) |
2282 | break; | |
b498ce1f | 2283 | } |
b498ce1f MH |
2284 | strlist__delete(rawlist); |
2285 | ||
146a1439 MH |
2286 | if (ret < 0) { |
2287 | strlist__delete(sl); | |
2288 | return NULL; | |
2289 | } | |
b498ce1f MH |
2290 | return sl; |
2291 | } | |
2292 | ||
0e60836b | 2293 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 2294 | { |
6eca8cc3 | 2295 | int ret = 0; |
0e60836b | 2296 | char *buf = synthesize_probe_trace_command(tev); |
5f03cba4 | 2297 | char sbuf[STRERR_BUFSIZE]; |
50656eec | 2298 | |
146a1439 | 2299 | if (!buf) { |
0e60836b | 2300 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
2301 | return -EINVAL; |
2302 | } | |
2303 | ||
fa28244d | 2304 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
2305 | if (!probe_event_dry_run) { |
2306 | ret = write(fd, buf, strlen(buf)); | |
7949ba1f NK |
2307 | if (ret <= 0) { |
2308 | ret = -errno; | |
146a1439 | 2309 | pr_warning("Failed to write event: %s\n", |
5f03cba4 | 2310 | strerror_r(errno, sbuf, sizeof(sbuf))); |
7949ba1f | 2311 | } |
f4d7da49 | 2312 | } |
4235b045 | 2313 | free(buf); |
146a1439 | 2314 | return ret; |
50656eec MH |
2315 | } |
2316 | ||
146a1439 MH |
2317 | static int get_new_event_name(char *buf, size_t len, const char *base, |
2318 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
2319 | { |
2320 | int i, ret; | |
17f88fcd MH |
2321 | |
2322 | /* Try no suffix */ | |
2323 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 | 2324 | if (ret < 0) { |
5f03cba4 | 2325 | pr_debug("snprintf() failed: %d\n", ret); |
146a1439 MH |
2326 | return ret; |
2327 | } | |
17f88fcd | 2328 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 2329 | return 0; |
17f88fcd | 2330 | |
d761b08b MH |
2331 | if (!allow_suffix) { |
2332 | pr_warning("Error: event \"%s\" already exists. " | |
2333 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 2334 | return -EEXIST; |
d761b08b MH |
2335 | } |
2336 | ||
17f88fcd MH |
2337 | /* Try to add suffix */ |
2338 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 2339 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 | 2340 | if (ret < 0) { |
5f03cba4 | 2341 | pr_debug("snprintf() failed: %d\n", ret); |
146a1439 MH |
2342 | return ret; |
2343 | } | |
b498ce1f MH |
2344 | if (!strlist__has_entry(namelist, buf)) |
2345 | break; | |
2346 | } | |
146a1439 MH |
2347 | if (i == MAX_EVENT_INDEX) { |
2348 | pr_warning("Too many events are on the same function.\n"); | |
2349 | ret = -ERANGE; | |
2350 | } | |
2351 | ||
2352 | return ret; | |
b498ce1f MH |
2353 | } |
2354 | ||
79702f61 MH |
2355 | /* Warn if the current kernel's uprobe implementation is old */ |
2356 | static void warn_uprobe_event_compat(struct probe_trace_event *tev) | |
2357 | { | |
2358 | int i; | |
2359 | char *buf = synthesize_probe_trace_command(tev); | |
2360 | ||
2361 | /* Old uprobe event doesn't support memory dereference */ | |
2362 | if (!tev->uprobes || tev->nargs == 0 || !buf) | |
2363 | goto out; | |
2364 | ||
2365 | for (i = 0; i < tev->nargs; i++) | |
2366 | if (strglobmatch(tev->args[i].value, "[$@+-]*")) { | |
2367 | pr_warning("Please upgrade your kernel to at least " | |
2368 | "3.14 to have access to feature %s\n", | |
2369 | tev->args[i].value); | |
2370 | break; | |
2371 | } | |
2372 | out: | |
2373 | free(buf); | |
2374 | } | |
2375 | ||
0e60836b SD |
2376 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
2377 | struct probe_trace_event *tevs, | |
146a1439 | 2378 | int ntevs, bool allow_suffix) |
50656eec | 2379 | { |
146a1439 | 2380 | int i, fd, ret; |
0e60836b | 2381 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
2382 | char buf[64]; |
2383 | const char *event, *group; | |
b498ce1f | 2384 | struct strlist *namelist; |
9aaf5a5f MH |
2385 | LIST_HEAD(blacklist); |
2386 | struct kprobe_blacklist_node *node; | |
50656eec | 2387 | |
225466f1 SD |
2388 | if (pev->uprobes) |
2389 | fd = open_uprobe_events(true); | |
2390 | else | |
2391 | fd = open_kprobe_events(true); | |
2392 | ||
5e45187c MH |
2393 | if (fd < 0) { |
2394 | print_open_warning(fd, !pev->uprobes); | |
146a1439 | 2395 | return fd; |
5e45187c MH |
2396 | } |
2397 | ||
b498ce1f | 2398 | /* Get current event names */ |
0e60836b | 2399 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
2400 | if (!namelist) { |
2401 | pr_debug("Failed to get current event list.\n"); | |
2402 | return -EIO; | |
2403 | } | |
9aaf5a5f MH |
2404 | /* Get kprobe blacklist if exists */ |
2405 | if (!pev->uprobes) { | |
2406 | ret = kprobe_blacklist__load(&blacklist); | |
2407 | if (ret < 0) | |
2408 | pr_debug("No kprobe blacklist support, ignored\n"); | |
2409 | } | |
4235b045 | 2410 | |
146a1439 | 2411 | ret = 0; |
5e17b28f | 2412 | pr_info("Added new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 2413 | for (i = 0; i < ntevs; i++) { |
4235b045 | 2414 | tev = &tevs[i]; |
9aaf5a5f MH |
2415 | /* Ensure that the address is NOT blacklisted */ |
2416 | node = kprobe_blacklist__find_by_address(&blacklist, | |
2417 | tev->point.address); | |
2418 | if (node) { | |
2419 | pr_warning("Warning: Skipped probing on blacklisted function: %s\n", node->symbol); | |
2420 | continue; | |
2421 | } | |
2422 | ||
4235b045 MH |
2423 | if (pev->event) |
2424 | event = pev->event; | |
2425 | else | |
2426 | if (pev->point.function) | |
2427 | event = pev->point.function; | |
2428 | else | |
2429 | event = tev->point.symbol; | |
2430 | if (pev->group) | |
2431 | group = pev->group; | |
2432 | else | |
2433 | group = PERFPROBE_GROUP; | |
2434 | ||
2435 | /* Get an unused new event name */ | |
146a1439 MH |
2436 | ret = get_new_event_name(buf, 64, event, |
2437 | namelist, allow_suffix); | |
2438 | if (ret < 0) | |
2439 | break; | |
4235b045 MH |
2440 | event = buf; |
2441 | ||
02b95dad MH |
2442 | tev->event = strdup(event); |
2443 | tev->group = strdup(group); | |
2444 | if (tev->event == NULL || tev->group == NULL) { | |
2445 | ret = -ENOMEM; | |
2446 | break; | |
2447 | } | |
0e60836b | 2448 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
2449 | if (ret < 0) |
2450 | break; | |
4235b045 MH |
2451 | /* Add added event name to namelist */ |
2452 | strlist__add(namelist, event); | |
2453 | ||
2454 | /* Trick here - save current event/group */ | |
2455 | event = pev->event; | |
2456 | group = pev->group; | |
2457 | pev->event = tev->event; | |
2458 | pev->group = tev->group; | |
fb226ccd | 2459 | show_perf_probe_event(pev, tev->point.module); |
4235b045 MH |
2460 | /* Trick here - restore current event/group */ |
2461 | pev->event = (char *)event; | |
2462 | pev->group = (char *)group; | |
2463 | ||
2464 | /* | |
2465 | * Probes after the first probe which comes from same | |
2466 | * user input are always allowed to add suffix, because | |
2467 | * there might be several addresses corresponding to | |
2468 | * one code line. | |
2469 | */ | |
2470 | allow_suffix = true; | |
50656eec | 2471 | } |
79702f61 MH |
2472 | if (ret == -EINVAL && pev->uprobes) |
2473 | warn_uprobe_event_compat(tev); | |
146a1439 | 2474 | |
9aaf5a5f MH |
2475 | /* Note that it is possible to skip all events because of blacklist */ |
2476 | if (ret >= 0 && tev->event) { | |
146a1439 | 2477 | /* Show how to use the event. */ |
5e17b28f MH |
2478 | pr_info("\nYou can now use it in all perf tools, such as:\n\n"); |
2479 | pr_info("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
146a1439 MH |
2480 | tev->event); |
2481 | } | |
a9b495b0 | 2482 | |
9aaf5a5f | 2483 | kprobe_blacklist__delete(&blacklist); |
e1d2017b | 2484 | strlist__delete(namelist); |
50656eec | 2485 | close(fd); |
146a1439 | 2486 | return ret; |
50656eec | 2487 | } |
fa28244d | 2488 | |
564c62a4 | 2489 | static int find_probe_functions(struct map *map, char *name) |
eb948e50 | 2490 | { |
564c62a4 | 2491 | int found = 0; |
0a3873a8 | 2492 | struct symbol *sym; |
564c62a4 | 2493 | |
0a3873a8 | 2494 | map__for_each_symbol_by_name(map, name, sym) { |
e578da3b | 2495 | found++; |
eb948e50 | 2496 | } |
564c62a4 NK |
2497 | |
2498 | return found; | |
eb948e50 MH |
2499 | } |
2500 | ||
2501 | #define strdup_or_goto(str, label) \ | |
2502 | ({ char *__p = strdup(str); if (!__p) goto label; __p; }) | |
2503 | ||
2504 | /* | |
2505 | * Find probe function addresses from map. | |
2506 | * Return an error or the number of found probe_trace_event | |
2507 | */ | |
2508 | static int find_probe_trace_events_from_map(struct perf_probe_event *pev, | |
2509 | struct probe_trace_event **tevs, | |
2510 | int max_tevs, const char *target) | |
e0faa8d3 | 2511 | { |
eb948e50 | 2512 | struct map *map = NULL; |
eb948e50 | 2513 | struct ref_reloc_sym *reloc_sym = NULL; |
e0faa8d3 | 2514 | struct symbol *sym; |
0e60836b | 2515 | struct probe_trace_event *tev; |
eb948e50 MH |
2516 | struct perf_probe_point *pp = &pev->point; |
2517 | struct probe_trace_point *tp; | |
564c62a4 | 2518 | int num_matched_functions; |
eb948e50 | 2519 | int ret, i; |
4235b045 | 2520 | |
9b118aca | 2521 | map = get_target_map(target, pev->uprobes); |
eb948e50 MH |
2522 | if (!map) { |
2523 | ret = -EINVAL; | |
2524 | goto out; | |
fb7345bb MH |
2525 | } |
2526 | ||
eb948e50 MH |
2527 | /* |
2528 | * Load matched symbols: Since the different local symbols may have | |
2529 | * same name but different addresses, this lists all the symbols. | |
2530 | */ | |
564c62a4 NK |
2531 | num_matched_functions = find_probe_functions(map, pp->function); |
2532 | if (num_matched_functions == 0) { | |
eb948e50 MH |
2533 | pr_err("Failed to find symbol %s in %s\n", pp->function, |
2534 | target ? : "kernel"); | |
2535 | ret = -ENOENT; | |
2536 | goto out; | |
2537 | } else if (num_matched_functions > max_tevs) { | |
2538 | pr_err("Too many functions matched in %s\n", | |
2539 | target ? : "kernel"); | |
2540 | ret = -E2BIG; | |
2541 | goto out; | |
fb7345bb MH |
2542 | } |
2543 | ||
25dd9171 | 2544 | if (!pev->uprobes && !pp->retprobe) { |
0560a0c4 | 2545 | reloc_sym = kernel_get_ref_reloc_sym(); |
eb948e50 MH |
2546 | if (!reloc_sym) { |
2547 | pr_warning("Relocated base symbol is not found!\n"); | |
2548 | ret = -EINVAL; | |
2549 | goto out; | |
2550 | } | |
2551 | } | |
4235b045 | 2552 | |
eb948e50 MH |
2553 | /* Setup result trace-probe-events */ |
2554 | *tevs = zalloc(sizeof(*tev) * num_matched_functions); | |
2555 | if (!*tevs) { | |
02b95dad | 2556 | ret = -ENOMEM; |
eb948e50 | 2557 | goto out; |
02b95dad | 2558 | } |
ce27a443 | 2559 | |
eb948e50 | 2560 | ret = 0; |
564c62a4 | 2561 | |
0a3873a8 | 2562 | map__for_each_symbol_by_name(map, pp->function, sym) { |
eb948e50 MH |
2563 | tev = (*tevs) + ret; |
2564 | tp = &tev->point; | |
2565 | if (ret == num_matched_functions) { | |
2566 | pr_warning("Too many symbols are listed. Skip it.\n"); | |
2567 | break; | |
ce27a443 | 2568 | } |
eb948e50 | 2569 | ret++; |
ce27a443 | 2570 | |
eb948e50 MH |
2571 | if (pp->offset > sym->end - sym->start) { |
2572 | pr_warning("Offset %ld is bigger than the size of %s\n", | |
2573 | pp->offset, sym->name); | |
2574 | ret = -ENOENT; | |
2575 | goto err_out; | |
2576 | } | |
2577 | /* Add one probe point */ | |
2578 | tp->address = map->unmap_ip(map, sym->start) + pp->offset; | |
2579 | if (reloc_sym) { | |
2580 | tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out); | |
2581 | tp->offset = tp->address - reloc_sym->addr; | |
2582 | } else { | |
2583 | tp->symbol = strdup_or_goto(sym->name, nomem_out); | |
2584 | tp->offset = pp->offset; | |
2585 | } | |
2586 | tp->retprobe = pp->retprobe; | |
2587 | if (target) | |
2588 | tev->point.module = strdup_or_goto(target, nomem_out); | |
2589 | tev->uprobes = pev->uprobes; | |
2590 | tev->nargs = pev->nargs; | |
2591 | if (tev->nargs) { | |
2592 | tev->args = zalloc(sizeof(struct probe_trace_arg) * | |
2593 | tev->nargs); | |
2594 | if (tev->args == NULL) | |
2595 | goto nomem_out; | |
e334016f | 2596 | } |
48481938 | 2597 | for (i = 0; i < tev->nargs; i++) { |
eb948e50 MH |
2598 | if (pev->args[i].name) |
2599 | tev->args[i].name = | |
2600 | strdup_or_goto(pev->args[i].name, | |
2601 | nomem_out); | |
2602 | ||
2603 | tev->args[i].value = strdup_or_goto(pev->args[i].var, | |
2604 | nomem_out); | |
2605 | if (pev->args[i].type) | |
2606 | tev->args[i].type = | |
2607 | strdup_or_goto(pev->args[i].type, | |
2608 | nomem_out); | |
48481938 | 2609 | } |
4235b045 MH |
2610 | } |
2611 | ||
eb948e50 | 2612 | out: |
9b118aca | 2613 | put_target_map(map, pev->uprobes); |
eb948e50 | 2614 | return ret; |
225466f1 | 2615 | |
eb948e50 MH |
2616 | nomem_out: |
2617 | ret = -ENOMEM; | |
2618 | err_out: | |
2619 | clear_probe_trace_events(*tevs, num_matched_functions); | |
2620 | zfree(tevs); | |
2621 | goto out; | |
2622 | } | |
1c1bc922 | 2623 | |
eb948e50 MH |
2624 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
2625 | struct probe_trace_event **tevs, | |
2626 | int max_tevs, const char *target) | |
2627 | { | |
2628 | int ret; | |
2629 | ||
2630 | if (pev->uprobes && !pev->group) { | |
2631 | /* Replace group name if not given */ | |
2632 | ret = convert_exec_to_group(target, &pev->group); | |
2633 | if (ret != 0) { | |
2634 | pr_warning("Failed to make a group name.\n"); | |
2635 | return ret; | |
2636 | } | |
02b95dad | 2637 | } |
e334016f | 2638 | |
eb948e50 MH |
2639 | /* Convert perf_probe_event with debuginfo */ |
2640 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, target); | |
2641 | if (ret != 0) | |
2642 | return ret; /* Found in debuginfo or got an error */ | |
2643 | ||
2644 | return find_probe_trace_events_from_map(pev, tevs, max_tevs, target); | |
4235b045 MH |
2645 | } |
2646 | ||
2647 | struct __event_package { | |
2648 | struct perf_probe_event *pev; | |
0e60836b | 2649 | struct probe_trace_event *tevs; |
4235b045 MH |
2650 | int ntevs; |
2651 | }; | |
2652 | ||
146a1439 | 2653 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
4eced234 | 2654 | int max_tevs, const char *target, bool force_add) |
4235b045 | 2655 | { |
146a1439 | 2656 | int i, j, ret; |
4235b045 MH |
2657 | struct __event_package *pkgs; |
2658 | ||
225466f1 | 2659 | ret = 0; |
e334016f | 2660 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
225466f1 | 2661 | |
e334016f MH |
2662 | if (pkgs == NULL) |
2663 | return -ENOMEM; | |
4235b045 | 2664 | |
ee45b6c2 | 2665 | ret = init_symbol_maps(pevs->uprobes); |
449e5b24 MH |
2666 | if (ret < 0) { |
2667 | free(pkgs); | |
146a1439 | 2668 | return ret; |
449e5b24 | 2669 | } |
4235b045 MH |
2670 | |
2671 | /* Loop 1: convert all events */ | |
2672 | for (i = 0; i < npevs; i++) { | |
2673 | pkgs[i].pev = &pevs[i]; | |
2674 | /* Convert with or without debuginfo */ | |
0e60836b | 2675 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
2676 | &pkgs[i].tevs, |
2677 | max_tevs, | |
4eced234 | 2678 | target); |
146a1439 MH |
2679 | if (ret < 0) |
2680 | goto end; | |
2681 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
2682 | } |
2683 | ||
4235b045 | 2684 | /* Loop 2: add all events */ |
8635bf6e | 2685 | for (i = 0; i < npevs; i++) { |
0e60836b | 2686 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 | 2687 | pkgs[i].ntevs, force_add); |
fbee632d ACM |
2688 | if (ret < 0) |
2689 | break; | |
2690 | } | |
146a1439 | 2691 | end: |
449e5b24 MH |
2692 | /* Loop 3: cleanup and free trace events */ |
2693 | for (i = 0; i < npevs; i++) { | |
146a1439 | 2694 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 2695 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
74cf249d | 2696 | zfree(&pkgs[i].tevs); |
449e5b24 MH |
2697 | } |
2698 | free(pkgs); | |
ee45b6c2 | 2699 | exit_symbol_maps(); |
146a1439 MH |
2700 | |
2701 | return ret; | |
e0faa8d3 MH |
2702 | } |
2703 | ||
0e60836b | 2704 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
2705 | { |
2706 | char *p; | |
2707 | char buf[128]; | |
4235b045 | 2708 | int ret; |
bbbb521b | 2709 | |
0e60836b | 2710 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
2711 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
2712 | if (ret < 0) | |
2713 | goto error; | |
2714 | ||
bbbb521b | 2715 | p = strchr(buf + 2, ':'); |
146a1439 MH |
2716 | if (!p) { |
2717 | pr_debug("Internal error: %s should have ':' but not.\n", | |
2718 | ent->s); | |
2719 | ret = -ENOTSUP; | |
2720 | goto error; | |
2721 | } | |
bbbb521b MH |
2722 | *p = '/'; |
2723 | ||
4235b045 MH |
2724 | pr_debug("Writing event: %s\n", buf); |
2725 | ret = write(fd, buf, strlen(buf)); | |
44a56040 MH |
2726 | if (ret < 0) { |
2727 | ret = -errno; | |
146a1439 | 2728 | goto error; |
44a56040 | 2729 | } |
146a1439 | 2730 | |
5e17b28f | 2731 | pr_info("Removed event: %s\n", ent->s); |
146a1439 MH |
2732 | return 0; |
2733 | error: | |
5f03cba4 MH |
2734 | pr_warning("Failed to delete event: %s\n", |
2735 | strerror_r(-ret, buf, sizeof(buf))); | |
146a1439 | 2736 | return ret; |
bbbb521b MH |
2737 | } |
2738 | ||
225466f1 SD |
2739 | static int del_trace_probe_event(int fd, const char *buf, |
2740 | struct strlist *namelist) | |
fa28244d | 2741 | { |
bbbb521b | 2742 | struct str_node *ent, *n; |
225466f1 | 2743 | int ret = -1; |
fa28244d | 2744 | |
bbbb521b MH |
2745 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
2746 | strlist__for_each_safe(ent, n, namelist) | |
2747 | if (strglobmatch(ent->s, buf)) { | |
0e60836b | 2748 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
2749 | if (ret < 0) |
2750 | break; | |
bbbb521b MH |
2751 | strlist__remove(namelist, ent); |
2752 | } | |
2753 | } else { | |
2754 | ent = strlist__find(namelist, buf); | |
2755 | if (ent) { | |
0e60836b | 2756 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
2757 | if (ret >= 0) |
2758 | strlist__remove(namelist, ent); | |
bbbb521b MH |
2759 | } |
2760 | } | |
146a1439 MH |
2761 | |
2762 | return ret; | |
fa28244d MH |
2763 | } |
2764 | ||
146a1439 | 2765 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 2766 | { |
225466f1 SD |
2767 | int ret = -1, ufd = -1, kfd = -1; |
2768 | char buf[128]; | |
fa28244d MH |
2769 | const char *group, *event; |
2770 | char *p, *str; | |
2771 | struct str_node *ent; | |
225466f1 | 2772 | struct strlist *namelist = NULL, *unamelist = NULL; |
146a1439 | 2773 | |
fa28244d | 2774 | /* Get current event names */ |
225466f1 | 2775 | kfd = open_kprobe_events(true); |
467ec085 MH |
2776 | if (kfd >= 0) |
2777 | namelist = get_probe_trace_event_names(kfd, true); | |
225466f1 | 2778 | |
225466f1 | 2779 | ufd = open_uprobe_events(true); |
467ec085 | 2780 | if (ufd >= 0) |
225466f1 SD |
2781 | unamelist = get_probe_trace_event_names(ufd, true); |
2782 | ||
467ec085 MH |
2783 | if (kfd < 0 && ufd < 0) { |
2784 | print_both_open_warning(kfd, ufd); | |
2785 | goto error; | |
2786 | } | |
2787 | ||
225466f1 SD |
2788 | if (namelist == NULL && unamelist == NULL) |
2789 | goto error; | |
fa28244d | 2790 | |
adf365f4 | 2791 | strlist__for_each(ent, dellist) { |
02b95dad MH |
2792 | str = strdup(ent->s); |
2793 | if (str == NULL) { | |
2794 | ret = -ENOMEM; | |
225466f1 | 2795 | goto error; |
02b95dad | 2796 | } |
bbbb521b | 2797 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
2798 | p = strchr(str, ':'); |
2799 | if (p) { | |
2800 | group = str; | |
2801 | *p = '\0'; | |
2802 | event = p + 1; | |
2803 | } else { | |
bbbb521b | 2804 | group = "*"; |
fa28244d MH |
2805 | event = str; |
2806 | } | |
225466f1 SD |
2807 | |
2808 | ret = e_snprintf(buf, 128, "%s:%s", group, event); | |
2809 | if (ret < 0) { | |
2810 | pr_err("Failed to copy event."); | |
2811 | free(str); | |
2812 | goto error; | |
2813 | } | |
2814 | ||
bbbb521b | 2815 | pr_debug("Group: %s, Event: %s\n", group, event); |
225466f1 SD |
2816 | |
2817 | if (namelist) | |
2818 | ret = del_trace_probe_event(kfd, buf, namelist); | |
2819 | ||
2820 | if (unamelist && ret != 0) | |
2821 | ret = del_trace_probe_event(ufd, buf, unamelist); | |
2822 | ||
2823 | if (ret != 0) | |
2824 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
2825 | ||
fa28244d MH |
2826 | free(str); |
2827 | } | |
225466f1 SD |
2828 | |
2829 | error: | |
2830 | if (kfd >= 0) { | |
a23c4dc4 | 2831 | strlist__delete(namelist); |
225466f1 SD |
2832 | close(kfd); |
2833 | } | |
2834 | ||
2835 | if (ufd >= 0) { | |
a23c4dc4 | 2836 | strlist__delete(unamelist); |
225466f1 SD |
2837 | close(ufd); |
2838 | } | |
146a1439 MH |
2839 | |
2840 | return ret; | |
fa28244d | 2841 | } |
225466f1 | 2842 | |
3c42258c MH |
2843 | /* TODO: don't use a global variable for filter ... */ |
2844 | static struct strfilter *available_func_filter; | |
fa28244d | 2845 | |
e80711ca | 2846 | /* |
3c42258c MH |
2847 | * If a symbol corresponds to a function with global binding and |
2848 | * matches filter return 0. For all others return 1. | |
e80711ca | 2849 | */ |
1d037ca1 | 2850 | static int filter_available_functions(struct map *map __maybe_unused, |
3c42258c | 2851 | struct symbol *sym) |
e80711ca | 2852 | { |
e578da3b | 2853 | if (strfilter__compare(available_func_filter, sym->name)) |
3c42258c MH |
2854 | return 0; |
2855 | return 1; | |
e80711ca MH |
2856 | } |
2857 | ||
2df58634 MH |
2858 | int show_available_funcs(const char *target, struct strfilter *_filter, |
2859 | bool user) | |
e80711ca MH |
2860 | { |
2861 | struct map *map; | |
2862 | int ret; | |
2863 | ||
2df58634 | 2864 | ret = init_symbol_maps(user); |
e80711ca MH |
2865 | if (ret < 0) |
2866 | return ret; | |
2867 | ||
2df58634 MH |
2868 | /* Get a symbol map */ |
2869 | if (user) | |
2870 | map = dso__new_map(target); | |
2871 | else | |
2872 | map = kernel_get_module_map(target); | |
e80711ca | 2873 | if (!map) { |
2df58634 | 2874 | pr_err("Failed to get a map for %s\n", (target) ? : "kernel"); |
e80711ca MH |
2875 | return -EINVAL; |
2876 | } | |
225466f1 | 2877 | |
2df58634 | 2878 | /* Load symbols with given filter */ |
3c42258c | 2879 | available_func_filter = _filter; |
2df58634 MH |
2880 | if (map__load(map, filter_available_functions)) { |
2881 | pr_err("Failed to load symbols in %s\n", (target) ? : "kernel"); | |
2882 | goto end; | |
2883 | } | |
2884 | if (!dso__sorted_by_name(map->dso, map->type)) | |
2885 | dso__sort_by_name(map->dso, map->type); | |
225466f1 | 2886 | |
2df58634 MH |
2887 | /* Show all (filtered) symbols */ |
2888 | setup_pager(); | |
2889 | dso__fprintf_symbols_by_name(map->dso, map->type, stdout); | |
2890 | end: | |
2891 | if (user) { | |
2892 | dso__delete(map->dso); | |
2893 | map__delete(map); | |
2894 | } | |
2895 | exit_symbol_maps(); | |
225466f1 | 2896 | |
2df58634 | 2897 | return ret; |
225466f1 SD |
2898 | } |
2899 |