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]); | |
ba92732e WN |
138 | if (!kmap) |
139 | return NULL; | |
8f33f7de MH |
140 | return kmap->ref_reloc_sym; |
141 | } | |
142 | ||
143 | static u64 kernel_get_symbol_address_by_name(const char *name, bool reloc) | |
144 | { | |
145 | struct ref_reloc_sym *reloc_sym; | |
146 | struct symbol *sym; | |
147 | struct map *map; | |
148 | ||
149 | /* ref_reloc_sym is just a label. Need a special fix*/ | |
150 | reloc_sym = kernel_get_ref_reloc_sym(); | |
151 | if (reloc_sym && strcmp(name, reloc_sym->name) == 0) | |
152 | return (reloc) ? reloc_sym->addr : reloc_sym->unrelocated_addr; | |
153 | else { | |
154 | sym = __find_kernel_function_by_name(name, &map); | |
155 | if (sym) | |
156 | return map->unmap_ip(map, sym->start) - | |
f56847c2 | 157 | ((reloc) ? 0 : map->reloc); |
8f33f7de MH |
158 | } |
159 | return 0; | |
160 | } | |
161 | ||
e80711ca MH |
162 | static struct map *kernel_get_module_map(const char *module) |
163 | { | |
164 | struct rb_node *nd; | |
ee45b6c2 | 165 | struct map_groups *grp = &host_machine->kmaps; |
e80711ca | 166 | |
14a8fd7c MH |
167 | /* A file path -- this is an offline module */ |
168 | if (module && strchr(module, '/')) | |
ee45b6c2 | 169 | return machine__new_module(host_machine, 0, module); |
14a8fd7c | 170 | |
e80711ca MH |
171 | if (!module) |
172 | module = "kernel"; | |
173 | ||
174 | for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) { | |
175 | struct map *pos = rb_entry(nd, struct map, rb_node); | |
176 | if (strncmp(pos->dso->short_name + 1, module, | |
177 | pos->dso->short_name_len - 2) == 0) { | |
178 | return pos; | |
179 | } | |
180 | } | |
181 | return NULL; | |
182 | } | |
183 | ||
9b118aca MH |
184 | static struct map *get_target_map(const char *target, bool user) |
185 | { | |
186 | /* Init maps of given executable or kernel */ | |
187 | if (user) | |
188 | return dso__new_map(target); | |
189 | else | |
190 | return kernel_get_module_map(target); | |
191 | } | |
192 | ||
193 | static void put_target_map(struct map *map, bool user) | |
194 | { | |
195 | if (map && user) { | |
196 | /* Only the user map needs to be released */ | |
197 | dso__delete(map->dso); | |
198 | map__delete(map); | |
199 | } | |
200 | } | |
201 | ||
202 | ||
e80711ca | 203 | static struct dso *kernel_get_module_dso(const char *module) |
469b9b88 MH |
204 | { |
205 | struct dso *dso; | |
fd930ff9 FBH |
206 | struct map *map; |
207 | const char *vmlinux_name; | |
469b9b88 MH |
208 | |
209 | if (module) { | |
8fa7d87f WL |
210 | list_for_each_entry(dso, &host_machine->kernel_dsos.head, |
211 | node) { | |
469b9b88 MH |
212 | if (strncmp(dso->short_name + 1, module, |
213 | dso->short_name_len - 2) == 0) | |
214 | goto found; | |
215 | } | |
216 | pr_debug("Failed to find module %s.\n", module); | |
217 | return NULL; | |
fd930ff9 FBH |
218 | } |
219 | ||
ee45b6c2 | 220 | map = host_machine->vmlinux_maps[MAP__FUNCTION]; |
fd930ff9 FBH |
221 | dso = map->dso; |
222 | ||
223 | vmlinux_name = symbol_conf.vmlinux_name; | |
224 | if (vmlinux_name) { | |
5230fb7d | 225 | if (dso__load_vmlinux(dso, map, vmlinux_name, false, NULL) <= 0) |
fd930ff9 | 226 | return NULL; |
469b9b88 | 227 | } else { |
c3a34e06 | 228 | if (dso__load_vmlinux_path(dso, map, NULL) <= 0) { |
469b9b88 MH |
229 | pr_debug("Failed to load kernel map.\n"); |
230 | return NULL; | |
231 | } | |
232 | } | |
233 | found: | |
e80711ca MH |
234 | return dso; |
235 | } | |
236 | ||
237 | const char *kernel_get_module_path(const char *module) | |
238 | { | |
239 | struct dso *dso = kernel_get_module_dso(module); | |
240 | return (dso) ? dso->long_name : NULL; | |
469b9b88 MH |
241 | } |
242 | ||
fb7345bb MH |
243 | static int convert_exec_to_group(const char *exec, char **result) |
244 | { | |
245 | char *ptr1, *ptr2, *exec_copy; | |
246 | char buf[64]; | |
247 | int ret; | |
248 | ||
249 | exec_copy = strdup(exec); | |
250 | if (!exec_copy) | |
251 | return -ENOMEM; | |
252 | ||
253 | ptr1 = basename(exec_copy); | |
254 | if (!ptr1) { | |
255 | ret = -EINVAL; | |
256 | goto out; | |
257 | } | |
258 | ||
259 | ptr2 = strpbrk(ptr1, "-._"); | |
260 | if (ptr2) | |
261 | *ptr2 = '\0'; | |
262 | ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1); | |
263 | if (ret < 0) | |
264 | goto out; | |
265 | ||
266 | *result = strdup(buf); | |
267 | ret = *result ? 0 : -ENOMEM; | |
268 | ||
269 | out: | |
270 | free(exec_copy); | |
271 | return ret; | |
272 | } | |
273 | ||
9b118aca MH |
274 | static void clear_perf_probe_point(struct perf_probe_point *pp) |
275 | { | |
276 | free(pp->file); | |
277 | free(pp->function); | |
278 | free(pp->lazy_line); | |
279 | } | |
280 | ||
eb948e50 MH |
281 | static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs) |
282 | { | |
283 | int i; | |
284 | ||
285 | for (i = 0; i < ntevs; i++) | |
286 | clear_probe_trace_event(tevs + i); | |
287 | } | |
288 | ||
89fe808a | 289 | #ifdef HAVE_DWARF_SUPPORT |
9b118aca MH |
290 | /* |
291 | * Some binaries like glibc have special symbols which are on the symbol | |
292 | * table, but not in the debuginfo. If we can find the address of the | |
293 | * symbol from map, we can translate the address back to the probe point. | |
294 | */ | |
295 | static int find_alternative_probe_point(struct debuginfo *dinfo, | |
296 | struct perf_probe_point *pp, | |
297 | struct perf_probe_point *result, | |
298 | const char *target, bool uprobes) | |
299 | { | |
300 | struct map *map = NULL; | |
301 | struct symbol *sym; | |
302 | u64 address = 0; | |
303 | int ret = -ENOENT; | |
304 | ||
305 | /* This can work only for function-name based one */ | |
306 | if (!pp->function || pp->file) | |
307 | return -ENOTSUP; | |
308 | ||
309 | map = get_target_map(target, uprobes); | |
310 | if (!map) | |
311 | return -EINVAL; | |
312 | ||
313 | /* Find the address of given function */ | |
314 | map__for_each_symbol_by_name(map, pp->function, sym) { | |
e6d7c91c MH |
315 | if (uprobes) |
316 | address = sym->start; | |
317 | else | |
318 | address = map->unmap_ip(map, sym->start); | |
e578da3b | 319 | break; |
9b118aca MH |
320 | } |
321 | if (!address) { | |
322 | ret = -ENOENT; | |
323 | goto out; | |
324 | } | |
f6c15621 WN |
325 | pr_debug("Symbol %s address found : %" PRIx64 "\n", |
326 | pp->function, address); | |
9b118aca MH |
327 | |
328 | ret = debuginfo__find_probe_point(dinfo, (unsigned long)address, | |
329 | result); | |
330 | if (ret <= 0) | |
331 | ret = (!ret) ? -ENOENT : ret; | |
332 | else { | |
333 | result->offset += pp->offset; | |
334 | result->line += pp->line; | |
9d7b45c5 | 335 | result->retprobe = pp->retprobe; |
9b118aca MH |
336 | ret = 0; |
337 | } | |
338 | ||
339 | out: | |
340 | put_target_map(map, uprobes); | |
341 | return ret; | |
342 | ||
343 | } | |
344 | ||
345 | static int get_alternative_probe_event(struct debuginfo *dinfo, | |
346 | struct perf_probe_event *pev, | |
347 | struct perf_probe_point *tmp, | |
348 | const char *target) | |
349 | { | |
350 | int ret; | |
351 | ||
352 | memcpy(tmp, &pev->point, sizeof(*tmp)); | |
353 | memset(&pev->point, 0, sizeof(pev->point)); | |
354 | ret = find_alternative_probe_point(dinfo, tmp, &pev->point, | |
355 | target, pev->uprobes); | |
356 | if (ret < 0) | |
357 | memcpy(&pev->point, tmp, sizeof(*tmp)); | |
358 | ||
359 | return ret; | |
360 | } | |
a15ad2f5 | 361 | |
811dd2ae MH |
362 | static int get_alternative_line_range(struct debuginfo *dinfo, |
363 | struct line_range *lr, | |
364 | const char *target, bool user) | |
365 | { | |
6d4a4896 DA |
366 | struct perf_probe_point pp = { .function = lr->function, |
367 | .file = lr->file, | |
368 | .line = lr->start }; | |
369 | struct perf_probe_point result; | |
811dd2ae MH |
370 | int ret, len = 0; |
371 | ||
6d4a4896 DA |
372 | memset(&result, 0, sizeof(result)); |
373 | ||
811dd2ae MH |
374 | if (lr->end != INT_MAX) |
375 | len = lr->end - lr->start; | |
376 | ret = find_alternative_probe_point(dinfo, &pp, &result, | |
377 | target, user); | |
378 | if (!ret) { | |
379 | lr->function = result.function; | |
380 | lr->file = result.file; | |
381 | lr->start = result.line; | |
382 | if (lr->end != INT_MAX) | |
383 | lr->end = lr->start + len; | |
384 | clear_perf_probe_point(&pp); | |
385 | } | |
386 | return ret; | |
387 | } | |
388 | ||
ff741783 | 389 | /* Open new debuginfo of given module */ |
92561cb7 | 390 | static struct debuginfo *open_debuginfo(const char *module, bool silent) |
e0faa8d3 | 391 | { |
a15ad2f5 | 392 | const char *path = module; |
92561cb7 | 393 | struct debuginfo *ret; |
ff741783 | 394 | |
a15ad2f5 | 395 | if (!module || !strchr(module, '/')) { |
14a8fd7c | 396 | path = kernel_get_module_path(module); |
14a8fd7c | 397 | if (!path) { |
92561cb7 MH |
398 | if (!silent) |
399 | pr_err("Failed to find path of %s module.\n", | |
400 | module ?: "kernel"); | |
14a8fd7c MH |
401 | return NULL; |
402 | } | |
e0faa8d3 | 403 | } |
92561cb7 MH |
404 | ret = debuginfo__new(path); |
405 | if (!ret && !silent) { | |
406 | pr_warning("The %s file has no debug information.\n", path); | |
407 | if (!module || !strtailcmp(path, ".ko")) | |
408 | pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, "); | |
409 | else | |
410 | pr_warning("Rebuild with -g, "); | |
411 | pr_warning("or install an appropriate debuginfo package.\n"); | |
412 | } | |
413 | return ret; | |
e0faa8d3 | 414 | } |
4b4da7f7 | 415 | |
92561cb7 | 416 | |
99ca4233 MH |
417 | static int get_text_start_address(const char *exec, unsigned long *address) |
418 | { | |
419 | Elf *elf; | |
420 | GElf_Ehdr ehdr; | |
421 | GElf_Shdr shdr; | |
422 | int fd, ret = -ENOENT; | |
423 | ||
424 | fd = open(exec, O_RDONLY); | |
425 | if (fd < 0) | |
426 | return -errno; | |
427 | ||
428 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
429 | if (elf == NULL) | |
430 | return -EINVAL; | |
431 | ||
432 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
433 | goto out; | |
434 | ||
435 | if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL)) | |
436 | goto out; | |
437 | ||
438 | *address = shdr.sh_addr - shdr.sh_offset; | |
439 | ret = 0; | |
440 | out: | |
441 | elf_end(elf); | |
442 | return ret; | |
443 | } | |
444 | ||
5a6f6314 MH |
445 | /* |
446 | * Convert trace point to probe point with debuginfo | |
447 | */ | |
448 | static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp, | |
449 | struct perf_probe_point *pp, | |
450 | bool is_kprobe) | |
451 | { | |
452 | struct debuginfo *dinfo = NULL; | |
453 | unsigned long stext = 0; | |
454 | u64 addr = tp->address; | |
455 | int ret = -ENOENT; | |
456 | ||
457 | /* convert the address to dwarf address */ | |
458 | if (!is_kprobe) { | |
459 | if (!addr) { | |
460 | ret = -EINVAL; | |
461 | goto error; | |
462 | } | |
463 | ret = get_text_start_address(tp->module, &stext); | |
464 | if (ret < 0) | |
465 | goto error; | |
466 | addr += stext; | |
467 | } else { | |
468 | addr = kernel_get_symbol_address_by_name(tp->symbol, false); | |
469 | if (addr == 0) | |
470 | goto error; | |
471 | addr += tp->offset; | |
472 | } | |
473 | ||
474 | pr_debug("try to find information at %" PRIx64 " in %s\n", addr, | |
475 | tp->module ? : "kernel"); | |
476 | ||
92561cb7 | 477 | dinfo = open_debuginfo(tp->module, verbose == 0); |
5a6f6314 MH |
478 | if (dinfo) { |
479 | ret = debuginfo__find_probe_point(dinfo, | |
480 | (unsigned long)addr, pp); | |
481 | debuginfo__delete(dinfo); | |
92561cb7 | 482 | } else |
5a6f6314 | 483 | ret = -ENOENT; |
5a6f6314 MH |
484 | |
485 | if (ret > 0) { | |
486 | pp->retprobe = tp->retprobe; | |
487 | return 0; | |
488 | } | |
489 | error: | |
490 | pr_debug("Failed to find corresponding probes from debuginfo.\n"); | |
491 | return ret ? : -ENOENT; | |
492 | } | |
493 | ||
fb7345bb MH |
494 | static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs, |
495 | int ntevs, const char *exec) | |
496 | { | |
497 | int i, ret = 0; | |
eb948e50 | 498 | unsigned long stext = 0; |
fb7345bb MH |
499 | |
500 | if (!exec) | |
501 | return 0; | |
502 | ||
503 | ret = get_text_start_address(exec, &stext); | |
504 | if (ret < 0) | |
505 | return ret; | |
506 | ||
507 | for (i = 0; i < ntevs && ret >= 0; i++) { | |
981a2379 | 508 | /* point.address is the addres of point.symbol + point.offset */ |
eb948e50 | 509 | tevs[i].point.address -= stext; |
fb7345bb | 510 | tevs[i].point.module = strdup(exec); |
eb948e50 | 511 | if (!tevs[i].point.module) { |
fb7345bb MH |
512 | ret = -ENOMEM; |
513 | break; | |
514 | } | |
515 | tevs[i].uprobes = true; | |
516 | } | |
517 | ||
518 | return ret; | |
519 | } | |
520 | ||
190b57fc MH |
521 | static int add_module_to_probe_trace_events(struct probe_trace_event *tevs, |
522 | int ntevs, const char *module) | |
523 | { | |
14a8fd7c MH |
524 | int i, ret = 0; |
525 | char *tmp; | |
526 | ||
527 | if (!module) | |
528 | return 0; | |
529 | ||
530 | tmp = strrchr(module, '/'); | |
531 | if (tmp) { | |
532 | /* This is a module path -- get the module name */ | |
533 | module = strdup(tmp + 1); | |
534 | if (!module) | |
535 | return -ENOMEM; | |
536 | tmp = strchr(module, '.'); | |
537 | if (tmp) | |
538 | *tmp = '\0'; | |
539 | tmp = (char *)module; /* For free() */ | |
540 | } | |
541 | ||
190b57fc MH |
542 | for (i = 0; i < ntevs; i++) { |
543 | tevs[i].point.module = strdup(module); | |
14a8fd7c MH |
544 | if (!tevs[i].point.module) { |
545 | ret = -ENOMEM; | |
546 | break; | |
547 | } | |
190b57fc | 548 | } |
14a8fd7c | 549 | |
f5385650 | 550 | free(tmp); |
14a8fd7c | 551 | return ret; |
190b57fc MH |
552 | } |
553 | ||
dfef99cd MH |
554 | /* Post processing the probe events */ |
555 | static int post_process_probe_trace_events(struct probe_trace_event *tevs, | |
556 | int ntevs, const char *module, | |
557 | bool uprobe) | |
558 | { | |
559 | struct ref_reloc_sym *reloc_sym; | |
560 | char *tmp; | |
561 | int i; | |
562 | ||
563 | if (uprobe) | |
564 | return add_exec_to_probe_trace_events(tevs, ntevs, module); | |
565 | ||
566 | /* Note that currently ref_reloc_sym based probe is not for drivers */ | |
567 | if (module) | |
568 | return add_module_to_probe_trace_events(tevs, ntevs, module); | |
569 | ||
8f33f7de | 570 | reloc_sym = kernel_get_ref_reloc_sym(); |
dfef99cd MH |
571 | if (!reloc_sym) { |
572 | pr_warning("Relocated base symbol is not found!\n"); | |
573 | return -EINVAL; | |
574 | } | |
575 | ||
576 | for (i = 0; i < ntevs; i++) { | |
25dd9171 | 577 | if (tevs[i].point.address && !tevs[i].point.retprobe) { |
dfef99cd MH |
578 | tmp = strdup(reloc_sym->name); |
579 | if (!tmp) | |
580 | return -ENOMEM; | |
581 | free(tevs[i].point.symbol); | |
582 | tevs[i].point.symbol = tmp; | |
583 | tevs[i].point.offset = tevs[i].point.address - | |
584 | reloc_sym->unrelocated_addr; | |
585 | } | |
586 | } | |
587 | return 0; | |
588 | } | |
589 | ||
4b4da7f7 | 590 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 591 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
190b57fc | 592 | struct probe_trace_event **tevs, |
4eced234 | 593 | int max_tevs, const char *target) |
4b4da7f7 MH |
594 | { |
595 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
9b118aca | 596 | struct perf_probe_point tmp; |
225466f1 | 597 | struct debuginfo *dinfo; |
190b57fc | 598 | int ntevs, ret = 0; |
4b4da7f7 | 599 | |
92561cb7 | 600 | dinfo = open_debuginfo(target, !need_dwarf); |
225466f1 | 601 | |
ff741783 | 602 | if (!dinfo) { |
92561cb7 | 603 | if (need_dwarf) |
ff741783 | 604 | return -ENOENT; |
ff741783 | 605 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
606 | return 0; |
607 | } | |
608 | ||
dfef99cd | 609 | pr_debug("Try to find probe point from debuginfo.\n"); |
ff741783 MH |
610 | /* Searching trace events corresponding to a probe event */ |
611 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs); | |
612 | ||
9b118aca MH |
613 | if (ntevs == 0) { /* Not found, retry with an alternative */ |
614 | ret = get_alternative_probe_event(dinfo, pev, &tmp, target); | |
615 | if (!ret) { | |
616 | ntevs = debuginfo__find_trace_events(dinfo, pev, | |
617 | tevs, max_tevs); | |
618 | /* | |
619 | * Write back to the original probe_event for | |
620 | * setting appropriate (user given) event name | |
621 | */ | |
622 | clear_perf_probe_point(&pev->point); | |
623 | memcpy(&pev->point, &tmp, sizeof(tmp)); | |
624 | } | |
625 | } | |
626 | ||
ff741783 | 627 | debuginfo__delete(dinfo); |
4b4da7f7 | 628 | |
146a1439 | 629 | if (ntevs > 0) { /* Succeeded to find trace events */ |
dfef99cd MH |
630 | pr_debug("Found %d probe_trace_events.\n", ntevs); |
631 | ret = post_process_probe_trace_events(*tevs, ntevs, | |
632 | target, pev->uprobes); | |
981d05ad MH |
633 | if (ret < 0) { |
634 | clear_probe_trace_events(*tevs, ntevs); | |
635 | zfree(tevs); | |
636 | } | |
190b57fc | 637 | return ret < 0 ? ret : ntevs; |
146a1439 | 638 | } |
4b4da7f7 | 639 | |
146a1439 | 640 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
0687eba7 | 641 | pr_warning("Probe point '%s' not found.\n", |
146a1439 | 642 | synthesize_perf_probe_point(&pev->point)); |
0687eba7 | 643 | return -ENOENT; |
146a1439 MH |
644 | } |
645 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
646 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
647 | if (ntevs == -EBADF) { | |
648 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
649 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
650 | if (!need_dwarf) { | |
0e43e5d2 | 651 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
652 | return 0; |
653 | } | |
4b4da7f7 | 654 | } |
15eca306 | 655 | return ntevs; |
4b4da7f7 MH |
656 | } |
657 | ||
658 | #define LINEBUF_SIZE 256 | |
659 | #define NR_ADDITIONAL_LINES 2 | |
660 | ||
fde52dbd | 661 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 | 662 | { |
5f03cba4 | 663 | char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE]; |
befe3414 FBH |
664 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
665 | const char *prefix = NULL; | |
4b4da7f7 | 666 | |
befe3414 | 667 | do { |
4b4da7f7 MH |
668 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
669 | goto error; | |
befe3414 FBH |
670 | if (skip) |
671 | continue; | |
672 | if (!prefix) { | |
673 | prefix = show_num ? "%7d " : " "; | |
674 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 675 | } |
befe3414 FBH |
676 | color_fprintf(stdout, color, "%s", buf); |
677 | ||
678 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 679 | |
fde52dbd | 680 | return 1; |
4b4da7f7 | 681 | error: |
fde52dbd | 682 | if (ferror(fp)) { |
5f03cba4 MH |
683 | pr_warning("File read error: %s\n", |
684 | strerror_r(errno, sbuf, sizeof(sbuf))); | |
fde52dbd FBH |
685 | return -1; |
686 | } | |
687 | return 0; | |
688 | } | |
146a1439 | 689 | |
fde52dbd FBH |
690 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
691 | { | |
692 | int rv = __show_one_line(fp, l, skip, show_num); | |
693 | if (rv == 0) { | |
694 | pr_warning("Source file is shorter than expected.\n"); | |
695 | rv = -1; | |
696 | } | |
697 | return rv; | |
4b4da7f7 MH |
698 | } |
699 | ||
fde52dbd FBH |
700 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
701 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
702 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
703 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
704 | ||
4b4da7f7 MH |
705 | /* |
706 | * Show line-range always requires debuginfo to find source file and | |
707 | * line number. | |
708 | */ | |
811dd2ae MH |
709 | static int __show_line_range(struct line_range *lr, const char *module, |
710 | bool user) | |
4b4da7f7 | 711 | { |
d3b63d7a | 712 | int l = 1; |
5a62257a | 713 | struct int_node *ln; |
ff741783 | 714 | struct debuginfo *dinfo; |
4b4da7f7 | 715 | FILE *fp; |
ff741783 | 716 | int ret; |
7cf0b79e | 717 | char *tmp; |
5f03cba4 | 718 | char sbuf[STRERR_BUFSIZE]; |
4b4da7f7 MH |
719 | |
720 | /* Search a line range */ | |
92561cb7 MH |
721 | dinfo = open_debuginfo(module, false); |
722 | if (!dinfo) | |
ff741783 | 723 | return -ENOENT; |
146a1439 | 724 | |
ff741783 | 725 | ret = debuginfo__find_line_range(dinfo, lr); |
811dd2ae MH |
726 | if (!ret) { /* Not found, retry with an alternative */ |
727 | ret = get_alternative_line_range(dinfo, lr, module, user); | |
728 | if (!ret) | |
729 | ret = debuginfo__find_line_range(dinfo, lr); | |
730 | } | |
ff741783 | 731 | debuginfo__delete(dinfo); |
5ee05b88 | 732 | if (ret == 0 || ret == -ENOENT) { |
146a1439 MH |
733 | pr_warning("Specified source line is not found.\n"); |
734 | return -ENOENT; | |
735 | } else if (ret < 0) { | |
5ee05b88 | 736 | pr_warning("Debuginfo analysis failed.\n"); |
146a1439 MH |
737 | return ret; |
738 | } | |
4b4da7f7 | 739 | |
7cf0b79e MH |
740 | /* Convert source file path */ |
741 | tmp = lr->path; | |
6a330a3c | 742 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
a78604de HK |
743 | |
744 | /* Free old path when new path is assigned */ | |
745 | if (tmp != lr->path) | |
746 | free(tmp); | |
747 | ||
7cf0b79e | 748 | if (ret < 0) { |
5ee05b88 | 749 | pr_warning("Failed to find source file path.\n"); |
7cf0b79e MH |
750 | return ret; |
751 | } | |
752 | ||
4b4da7f7 MH |
753 | setup_pager(); |
754 | ||
755 | if (lr->function) | |
8737ebde | 756 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
757 | lr->start - lr->offset); |
758 | else | |
62c15fc4 | 759 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
760 | |
761 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
762 | if (fp == NULL) { |
763 | pr_warning("Failed to open %s: %s\n", lr->path, | |
5f03cba4 | 764 | strerror_r(errno, sbuf, sizeof(sbuf))); |
146a1439 MH |
765 | return -errno; |
766 | } | |
4b4da7f7 | 767 | /* Skip to starting line number */ |
44b81e92 | 768 | while (l < lr->start) { |
fde52dbd | 769 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
770 | if (ret < 0) |
771 | goto end; | |
772 | } | |
4b4da7f7 | 773 | |
5a62257a MH |
774 | intlist__for_each(ln, lr->line_list) { |
775 | for (; ln->i > l; l++) { | |
fde52dbd | 776 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
777 | if (ret < 0) |
778 | goto end; | |
779 | } | |
fde52dbd | 780 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
781 | if (ret < 0) |
782 | goto end; | |
4b4da7f7 MH |
783 | } |
784 | ||
785 | if (lr->end == INT_MAX) | |
786 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
787 | while (l <= lr->end) { |
788 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
789 | if (ret <= 0) | |
44b81e92 FBH |
790 | break; |
791 | } | |
146a1439 | 792 | end: |
4b4da7f7 | 793 | fclose(fp); |
146a1439 | 794 | return ret; |
4b4da7f7 MH |
795 | } |
796 | ||
2b394bc4 | 797 | int show_line_range(struct line_range *lr, const char *module, bool user) |
ee45b6c2 MH |
798 | { |
799 | int ret; | |
800 | ||
2b394bc4 | 801 | ret = init_symbol_maps(user); |
ee45b6c2 MH |
802 | if (ret < 0) |
803 | return ret; | |
811dd2ae | 804 | ret = __show_line_range(lr, module, user); |
ee45b6c2 MH |
805 | exit_symbol_maps(); |
806 | ||
807 | return ret; | |
808 | } | |
809 | ||
ff741783 MH |
810 | static int show_available_vars_at(struct debuginfo *dinfo, |
811 | struct perf_probe_event *pev, | |
bd09d7b5 | 812 | int max_vls, struct strfilter *_filter, |
9b118aca | 813 | bool externs, const char *target) |
cf6eb489 MH |
814 | { |
815 | char *buf; | |
bd09d7b5 | 816 | int ret, i, nvars; |
cf6eb489 MH |
817 | struct str_node *node; |
818 | struct variable_list *vls = NULL, *vl; | |
9b118aca | 819 | struct perf_probe_point tmp; |
bd09d7b5 | 820 | const char *var; |
cf6eb489 MH |
821 | |
822 | buf = synthesize_perf_probe_point(&pev->point); | |
823 | if (!buf) | |
824 | return -EINVAL; | |
825 | pr_debug("Searching variables at %s\n", buf); | |
826 | ||
ff741783 MH |
827 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls, |
828 | max_vls, externs); | |
9b118aca MH |
829 | if (!ret) { /* Not found, retry with an alternative */ |
830 | ret = get_alternative_probe_event(dinfo, pev, &tmp, target); | |
831 | if (!ret) { | |
832 | ret = debuginfo__find_available_vars_at(dinfo, pev, | |
833 | &vls, max_vls, externs); | |
834 | /* Release the old probe_point */ | |
835 | clear_perf_probe_point(&tmp); | |
836 | } | |
837 | } | |
bd09d7b5 | 838 | if (ret <= 0) { |
69e96eaa MH |
839 | if (ret == 0 || ret == -ENOENT) { |
840 | pr_err("Failed to find the address of %s\n", buf); | |
841 | ret = -ENOENT; | |
842 | } else | |
843 | pr_warning("Debuginfo analysis failed.\n"); | |
bd09d7b5 MH |
844 | goto end; |
845 | } | |
69e96eaa | 846 | |
bd09d7b5 MH |
847 | /* Some variables are found */ |
848 | fprintf(stdout, "Available variables at %s\n", buf); | |
849 | for (i = 0; i < ret; i++) { | |
850 | vl = &vls[i]; | |
851 | /* | |
852 | * A probe point might be converted to | |
853 | * several trace points. | |
854 | */ | |
855 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
856 | vl->point.offset); | |
74cf249d | 857 | zfree(&vl->point.symbol); |
bd09d7b5 MH |
858 | nvars = 0; |
859 | if (vl->vars) { | |
860 | strlist__for_each(node, vl->vars) { | |
861 | var = strchr(node->s, '\t') + 1; | |
862 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 863 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
864 | nvars++; |
865 | } | |
866 | } | |
867 | strlist__delete(vl->vars); | |
cf6eb489 | 868 | } |
bd09d7b5 MH |
869 | if (nvars == 0) |
870 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
871 | } | |
872 | free(vls); | |
873 | end: | |
cf6eb489 MH |
874 | free(buf); |
875 | return ret; | |
876 | } | |
877 | ||
878 | /* Show available variables on given probe point */ | |
879 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
bd09d7b5 MH |
880 | int max_vls, const char *module, |
881 | struct strfilter *_filter, bool externs) | |
cf6eb489 | 882 | { |
ff741783 MH |
883 | int i, ret = 0; |
884 | struct debuginfo *dinfo; | |
cf6eb489 | 885 | |
2b394bc4 | 886 | ret = init_symbol_maps(pevs->uprobes); |
cf6eb489 MH |
887 | if (ret < 0) |
888 | return ret; | |
889 | ||
92561cb7 | 890 | dinfo = open_debuginfo(module, false); |
ff741783 | 891 | if (!dinfo) { |
ee45b6c2 MH |
892 | ret = -ENOENT; |
893 | goto out; | |
ff741783 MH |
894 | } |
895 | ||
cf6eb489 MH |
896 | setup_pager(); |
897 | ||
ff741783 MH |
898 | for (i = 0; i < npevs && ret >= 0; i++) |
899 | ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter, | |
9b118aca | 900 | externs, module); |
ff741783 MH |
901 | |
902 | debuginfo__delete(dinfo); | |
ee45b6c2 MH |
903 | out: |
904 | exit_symbol_maps(); | |
cf6eb489 MH |
905 | return ret; |
906 | } | |
907 | ||
89fe808a | 908 | #else /* !HAVE_DWARF_SUPPORT */ |
4b4da7f7 | 909 | |
5a6f6314 MH |
910 | static int |
911 | find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused, | |
912 | struct perf_probe_point *pp __maybe_unused, | |
913 | bool is_kprobe __maybe_unused) | |
4b4da7f7 | 914 | { |
5a6f6314 | 915 | return -ENOSYS; |
4b4da7f7 MH |
916 | } |
917 | ||
0e60836b | 918 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
1d037ca1 | 919 | struct probe_trace_event **tevs __maybe_unused, |
1d027ee9 ACM |
920 | int max_tevs __maybe_unused, |
921 | const char *target __maybe_unused) | |
4b4da7f7 | 922 | { |
146a1439 MH |
923 | if (perf_probe_event_need_dwarf(pev)) { |
924 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
925 | return -ENOSYS; | |
926 | } | |
225466f1 | 927 | |
4b4da7f7 MH |
928 | return 0; |
929 | } | |
930 | ||
1d037ca1 | 931 | int show_line_range(struct line_range *lr __maybe_unused, |
2b394bc4 MH |
932 | const char *module __maybe_unused, |
933 | bool user __maybe_unused) | |
4b4da7f7 | 934 | { |
146a1439 MH |
935 | pr_warning("Debuginfo-analysis is not supported.\n"); |
936 | return -ENOSYS; | |
4b4da7f7 MH |
937 | } |
938 | ||
1d037ca1 IT |
939 | int show_available_vars(struct perf_probe_event *pevs __maybe_unused, |
940 | int npevs __maybe_unused, int max_vls __maybe_unused, | |
941 | const char *module __maybe_unused, | |
942 | struct strfilter *filter __maybe_unused, | |
943 | bool externs __maybe_unused) | |
cf6eb489 MH |
944 | { |
945 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
946 | return -ENOSYS; | |
947 | } | |
e0faa8d3 MH |
948 | #endif |
949 | ||
e53b00d3 MH |
950 | void line_range__clear(struct line_range *lr) |
951 | { | |
e53b00d3 MH |
952 | free(lr->function); |
953 | free(lr->file); | |
954 | free(lr->path); | |
955 | free(lr->comp_dir); | |
5a62257a | 956 | intlist__delete(lr->line_list); |
e53b00d3 MH |
957 | memset(lr, 0, sizeof(*lr)); |
958 | } | |
959 | ||
5a62257a | 960 | int line_range__init(struct line_range *lr) |
e53b00d3 MH |
961 | { |
962 | memset(lr, 0, sizeof(*lr)); | |
5a62257a MH |
963 | lr->line_list = intlist__new(NULL); |
964 | if (!lr->line_list) | |
965 | return -ENOMEM; | |
966 | else | |
967 | return 0; | |
e53b00d3 MH |
968 | } |
969 | ||
21dd9ae5 FBH |
970 | static int parse_line_num(char **ptr, int *val, const char *what) |
971 | { | |
972 | const char *start = *ptr; | |
973 | ||
974 | errno = 0; | |
975 | *val = strtol(*ptr, ptr, 0); | |
976 | if (errno || *ptr == start) { | |
977 | semantic_error("'%s' is not a valid number.\n", what); | |
978 | return -EINVAL; | |
979 | } | |
980 | return 0; | |
981 | } | |
982 | ||
9d95b580 FBH |
983 | /* |
984 | * Stuff 'lr' according to the line range described by 'arg'. | |
985 | * The line range syntax is described by: | |
986 | * | |
987 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 988 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 989 | */ |
146a1439 | 990 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 991 | { |
e116dfa1 | 992 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
993 | int err; |
994 | ||
995 | if (!name) | |
996 | return -ENOMEM; | |
997 | ||
998 | lr->start = 0; | |
999 | lr->end = INT_MAX; | |
1000 | ||
1001 | range = strchr(name, ':'); | |
1002 | if (range) { | |
1003 | *range++ = '\0'; | |
1004 | ||
1005 | err = parse_line_num(&range, &lr->start, "start line"); | |
1006 | if (err) | |
1007 | goto err; | |
1008 | ||
1009 | if (*range == '+' || *range == '-') { | |
1010 | const char c = *range++; | |
1011 | ||
1012 | err = parse_line_num(&range, &lr->end, "end line"); | |
1013 | if (err) | |
1014 | goto err; | |
1015 | ||
1016 | if (c == '+') { | |
1017 | lr->end += lr->start; | |
1018 | /* | |
1019 | * Adjust the number of lines here. | |
1020 | * If the number of lines == 1, the | |
1021 | * the end of line should be equal to | |
1022 | * the start of line. | |
1023 | */ | |
1024 | lr->end--; | |
1025 | } | |
1026 | } | |
9d95b580 | 1027 | |
d3b63d7a | 1028 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
1029 | |
1030 | err = -EINVAL; | |
d3b63d7a | 1031 | if (lr->start > lr->end) { |
631c9def | 1032 | semantic_error("Start line must be smaller" |
146a1439 | 1033 | " than end line.\n"); |
21dd9ae5 | 1034 | goto err; |
146a1439 | 1035 | } |
21dd9ae5 FBH |
1036 | if (*range != '\0') { |
1037 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
1038 | goto err; | |
146a1439 | 1039 | } |
d3b63d7a | 1040 | } |
02b95dad | 1041 | |
e116dfa1 MH |
1042 | file = strchr(name, '@'); |
1043 | if (file) { | |
1044 | *file = '\0'; | |
1045 | lr->file = strdup(++file); | |
1046 | if (lr->file == NULL) { | |
1047 | err = -ENOMEM; | |
1048 | goto err; | |
1049 | } | |
1050 | lr->function = name; | |
1051 | } else if (strchr(name, '.')) | |
21dd9ae5 | 1052 | lr->file = name; |
631c9def | 1053 | else |
21dd9ae5 | 1054 | lr->function = name; |
146a1439 MH |
1055 | |
1056 | return 0; | |
21dd9ae5 FBH |
1057 | err: |
1058 | free(name); | |
1059 | return err; | |
631c9def MH |
1060 | } |
1061 | ||
b7702a21 MH |
1062 | /* Check the name is good for event/group */ |
1063 | static bool check_event_name(const char *name) | |
1064 | { | |
1065 | if (!isalpha(*name) && *name != '_') | |
1066 | return false; | |
1067 | while (*++name != '\0') { | |
1068 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
1069 | return false; | |
1070 | } | |
1071 | return true; | |
1072 | } | |
1073 | ||
50656eec | 1074 | /* Parse probepoint definition. */ |
146a1439 | 1075 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 1076 | { |
4235b045 | 1077 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
1078 | char *ptr, *tmp; |
1079 | char c, nc = 0; | |
1080 | /* | |
1081 | * <Syntax> | |
2a9c8c36 MH |
1082 | * perf probe [EVENT=]SRC[:LN|;PTN] |
1083 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
1084 | * |
1085 | * TODO:Group name support | |
50656eec MH |
1086 | */ |
1087 | ||
2a9c8c36 MH |
1088 | ptr = strpbrk(arg, ";=@+%"); |
1089 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
1090 | *ptr = '\0'; |
1091 | tmp = ptr + 1; | |
146a1439 MH |
1092 | if (strchr(arg, ':')) { |
1093 | semantic_error("Group name is not supported yet.\n"); | |
1094 | return -ENOTSUP; | |
1095 | } | |
1096 | if (!check_event_name(arg)) { | |
b7702a21 | 1097 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
1098 | "follow C symbol-naming rule.\n", arg); |
1099 | return -EINVAL; | |
1100 | } | |
02b95dad MH |
1101 | pev->event = strdup(arg); |
1102 | if (pev->event == NULL) | |
1103 | return -ENOMEM; | |
4235b045 | 1104 | pev->group = NULL; |
af663d75 MH |
1105 | arg = tmp; |
1106 | } | |
1107 | ||
2a9c8c36 | 1108 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
1109 | if (ptr) { |
1110 | nc = *ptr; | |
1111 | *ptr++ = '\0'; | |
1112 | } | |
1113 | ||
02b95dad MH |
1114 | tmp = strdup(arg); |
1115 | if (tmp == NULL) | |
1116 | return -ENOMEM; | |
1117 | ||
50656eec | 1118 | /* Check arg is function or file and copy it */ |
02b95dad MH |
1119 | if (strchr(tmp, '.')) /* File */ |
1120 | pp->file = tmp; | |
50656eec | 1121 | else /* Function */ |
02b95dad | 1122 | pp->function = tmp; |
50656eec MH |
1123 | |
1124 | /* Parse other options */ | |
1125 | while (ptr) { | |
1126 | arg = ptr; | |
1127 | c = nc; | |
2a9c8c36 | 1128 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
1129 | pp->lazy_line = strdup(arg); |
1130 | if (pp->lazy_line == NULL) | |
1131 | return -ENOMEM; | |
2a9c8c36 MH |
1132 | break; |
1133 | } | |
1134 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
1135 | if (ptr) { |
1136 | nc = *ptr; | |
1137 | *ptr++ = '\0'; | |
1138 | } | |
1139 | switch (c) { | |
1140 | case ':': /* Line number */ | |
1141 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 1142 | if (*tmp != '\0') { |
2a9c8c36 | 1143 | semantic_error("There is non-digit char" |
146a1439 MH |
1144 | " in line number.\n"); |
1145 | return -EINVAL; | |
1146 | } | |
50656eec MH |
1147 | break; |
1148 | case '+': /* Byte offset from a symbol */ | |
1149 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 1150 | if (*tmp != '\0') { |
2a9c8c36 | 1151 | semantic_error("There is non-digit character" |
146a1439 MH |
1152 | " in offset.\n"); |
1153 | return -EINVAL; | |
1154 | } | |
50656eec MH |
1155 | break; |
1156 | case '@': /* File name */ | |
146a1439 MH |
1157 | if (pp->file) { |
1158 | semantic_error("SRC@SRC is not allowed.\n"); | |
1159 | return -EINVAL; | |
1160 | } | |
02b95dad MH |
1161 | pp->file = strdup(arg); |
1162 | if (pp->file == NULL) | |
1163 | return -ENOMEM; | |
50656eec MH |
1164 | break; |
1165 | case '%': /* Probe places */ | |
1166 | if (strcmp(arg, "return") == 0) { | |
1167 | pp->retprobe = 1; | |
146a1439 MH |
1168 | } else { /* Others not supported yet */ |
1169 | semantic_error("%%%s is not supported.\n", arg); | |
1170 | return -ENOTSUP; | |
1171 | } | |
50656eec | 1172 | break; |
146a1439 MH |
1173 | default: /* Buggy case */ |
1174 | pr_err("This program has a bug at %s:%d.\n", | |
1175 | __FILE__, __LINE__); | |
1176 | return -ENOTSUP; | |
50656eec MH |
1177 | break; |
1178 | } | |
1179 | } | |
1180 | ||
1181 | /* Exclusion check */ | |
146a1439 | 1182 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
1183 | semantic_error("Lazy pattern can't be used with" |
1184 | " line number.\n"); | |
146a1439 MH |
1185 | return -EINVAL; |
1186 | } | |
2a9c8c36 | 1187 | |
146a1439 | 1188 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 1189 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
1190 | return -EINVAL; |
1191 | } | |
2a9c8c36 | 1192 | |
146a1439 | 1193 | if (pp->line && pp->offset) { |
0e43e5d2 | 1194 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
1195 | return -EINVAL; |
1196 | } | |
50656eec | 1197 | |
146a1439 | 1198 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 1199 | semantic_error("File always requires line number or " |
0e43e5d2 | 1200 | "lazy pattern.\n"); |
146a1439 MH |
1201 | return -EINVAL; |
1202 | } | |
50656eec | 1203 | |
146a1439 | 1204 | if (pp->offset && !pp->function) { |
0e43e5d2 | 1205 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
1206 | return -EINVAL; |
1207 | } | |
50656eec | 1208 | |
146a1439 | 1209 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 1210 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
1211 | return -EINVAL; |
1212 | } | |
50656eec | 1213 | |
146a1439 | 1214 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 1215 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 1216 | "return probe.\n"); |
146a1439 MH |
1217 | return -EINVAL; |
1218 | } | |
50656eec | 1219 | |
4235b045 | 1220 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
1221 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
1222 | pp->lazy_line); | |
146a1439 | 1223 | return 0; |
50656eec MH |
1224 | } |
1225 | ||
7df2f329 | 1226 | /* Parse perf-probe event argument */ |
146a1439 | 1227 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 1228 | { |
b2a3c12b | 1229 | char *tmp, *goodname; |
7df2f329 MH |
1230 | struct perf_probe_arg_field **fieldp; |
1231 | ||
1232 | pr_debug("parsing arg: %s into ", str); | |
1233 | ||
48481938 MH |
1234 | tmp = strchr(str, '='); |
1235 | if (tmp) { | |
02b95dad MH |
1236 | arg->name = strndup(str, tmp - str); |
1237 | if (arg->name == NULL) | |
1238 | return -ENOMEM; | |
11a1ca35 | 1239 | pr_debug("name:%s ", arg->name); |
48481938 MH |
1240 | str = tmp + 1; |
1241 | } | |
1242 | ||
11a1ca35 MH |
1243 | tmp = strchr(str, ':'); |
1244 | if (tmp) { /* Type setting */ | |
1245 | *tmp = '\0'; | |
02b95dad MH |
1246 | arg->type = strdup(tmp + 1); |
1247 | if (arg->type == NULL) | |
1248 | return -ENOMEM; | |
11a1ca35 MH |
1249 | pr_debug("type:%s ", arg->type); |
1250 | } | |
1251 | ||
b2a3c12b | 1252 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
1253 | if (!is_c_varname(str) || !tmp) { |
1254 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
1255 | arg->var = strdup(str); |
1256 | if (arg->var == NULL) | |
1257 | return -ENOMEM; | |
48481938 | 1258 | pr_debug("%s\n", arg->var); |
146a1439 | 1259 | return 0; |
7df2f329 MH |
1260 | } |
1261 | ||
b2a3c12b | 1262 | /* Structure fields or array element */ |
02b95dad MH |
1263 | arg->var = strndup(str, tmp - str); |
1264 | if (arg->var == NULL) | |
1265 | return -ENOMEM; | |
b2a3c12b | 1266 | goodname = arg->var; |
48481938 | 1267 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
1268 | fieldp = &arg->field; |
1269 | ||
1270 | do { | |
e334016f MH |
1271 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
1272 | if (*fieldp == NULL) | |
1273 | return -ENOMEM; | |
b2a3c12b MH |
1274 | if (*tmp == '[') { /* Array */ |
1275 | str = tmp; | |
1276 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 1277 | (*fieldp)->ref = true; |
b2a3c12b MH |
1278 | if (*tmp != ']' || tmp == str + 1) { |
1279 | semantic_error("Array index must be a" | |
1280 | " number.\n"); | |
1281 | return -EINVAL; | |
1282 | } | |
1283 | tmp++; | |
1284 | if (*tmp == '\0') | |
1285 | tmp = NULL; | |
1286 | } else { /* Structure */ | |
1287 | if (*tmp == '.') { | |
1288 | str = tmp + 1; | |
1289 | (*fieldp)->ref = false; | |
1290 | } else if (tmp[1] == '>') { | |
1291 | str = tmp + 2; | |
1292 | (*fieldp)->ref = true; | |
1293 | } else { | |
1294 | semantic_error("Argument parse error: %s\n", | |
1295 | str); | |
1296 | return -EINVAL; | |
1297 | } | |
1298 | tmp = strpbrk(str, "-.["); | |
146a1439 | 1299 | } |
7df2f329 | 1300 | if (tmp) { |
02b95dad MH |
1301 | (*fieldp)->name = strndup(str, tmp - str); |
1302 | if ((*fieldp)->name == NULL) | |
1303 | return -ENOMEM; | |
b2a3c12b MH |
1304 | if (*str != '[') |
1305 | goodname = (*fieldp)->name; | |
7df2f329 MH |
1306 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
1307 | fieldp = &(*fieldp)->next; | |
1308 | } | |
1309 | } while (tmp); | |
02b95dad MH |
1310 | (*fieldp)->name = strdup(str); |
1311 | if ((*fieldp)->name == NULL) | |
1312 | return -ENOMEM; | |
b2a3c12b MH |
1313 | if (*str != '[') |
1314 | goodname = (*fieldp)->name; | |
7df2f329 | 1315 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 1316 | |
b2a3c12b | 1317 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 1318 | if (!arg->name) { |
b2a3c12b | 1319 | arg->name = strdup(goodname); |
02b95dad MH |
1320 | if (arg->name == NULL) |
1321 | return -ENOMEM; | |
1322 | } | |
146a1439 | 1323 | return 0; |
7df2f329 MH |
1324 | } |
1325 | ||
4235b045 | 1326 | /* Parse perf-probe event command */ |
146a1439 | 1327 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1328 | { |
e1c01d61 | 1329 | char **argv; |
146a1439 | 1330 | int argc, i, ret = 0; |
fac13fd5 | 1331 | |
4235b045 | 1332 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1333 | if (!argv) { |
1334 | pr_debug("Failed to split arguments.\n"); | |
1335 | return -ENOMEM; | |
1336 | } | |
1337 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1338 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1339 | ret = -ERANGE; | |
1340 | goto out; | |
1341 | } | |
50656eec | 1342 | /* Parse probe point */ |
146a1439 MH |
1343 | ret = parse_perf_probe_point(argv[0], pev); |
1344 | if (ret < 0) | |
1345 | goto out; | |
50656eec | 1346 | |
e1c01d61 | 1347 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1348 | pev->nargs = argc - 1; |
e334016f MH |
1349 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1350 | if (pev->args == NULL) { | |
1351 | ret = -ENOMEM; | |
1352 | goto out; | |
1353 | } | |
146a1439 MH |
1354 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1355 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1356 | if (ret >= 0 && | |
1357 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1358 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1359 | " kretprobe.\n"); |
1360 | ret = -EINVAL; | |
1361 | } | |
e1c01d61 | 1362 | } |
146a1439 | 1363 | out: |
e1c01d61 | 1364 | argv_free(argv); |
146a1439 MH |
1365 | |
1366 | return ret; | |
50656eec MH |
1367 | } |
1368 | ||
4235b045 MH |
1369 | /* Return true if this perf_probe_event requires debuginfo */ |
1370 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1371 | { | |
1372 | int i; | |
1373 | ||
1374 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
1375 | return true; | |
1376 | ||
1377 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 1378 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
1379 | return true; |
1380 | ||
1381 | return false; | |
1382 | } | |
1383 | ||
0e60836b SD |
1384 | /* Parse probe_events event into struct probe_point */ |
1385 | static int parse_probe_trace_command(const char *cmd, | |
190b57fc | 1386 | struct probe_trace_event *tev) |
4de189fe | 1387 | { |
0e60836b | 1388 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1389 | char pr; |
1390 | char *p; | |
bcbd0040 | 1391 | char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str; |
4de189fe MH |
1392 | int ret, i, argc; |
1393 | char **argv; | |
1394 | ||
0e60836b | 1395 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1396 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1397 | if (!argv) { |
1398 | pr_debug("Failed to split arguments.\n"); | |
1399 | return -ENOMEM; | |
1400 | } | |
1401 | if (argc < 2) { | |
1402 | semantic_error("Too few probe arguments.\n"); | |
1403 | ret = -ERANGE; | |
1404 | goto out; | |
1405 | } | |
4de189fe MH |
1406 | |
1407 | /* Scan event and group name. */ | |
bcbd0040 IT |
1408 | argv0_str = strdup(argv[0]); |
1409 | if (argv0_str == NULL) { | |
1410 | ret = -ENOMEM; | |
1411 | goto out; | |
1412 | } | |
1413 | fmt1_str = strtok_r(argv0_str, ":", &fmt); | |
1414 | fmt2_str = strtok_r(NULL, "/", &fmt); | |
1415 | fmt3_str = strtok_r(NULL, " \t", &fmt); | |
1416 | if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL | |
1417 | || fmt3_str == NULL) { | |
146a1439 MH |
1418 | semantic_error("Failed to parse event name: %s\n", argv[0]); |
1419 | ret = -EINVAL; | |
1420 | goto out; | |
1421 | } | |
bcbd0040 IT |
1422 | pr = fmt1_str[0]; |
1423 | tev->group = strdup(fmt2_str); | |
1424 | tev->event = strdup(fmt3_str); | |
1425 | if (tev->group == NULL || tev->event == NULL) { | |
1426 | ret = -ENOMEM; | |
1427 | goto out; | |
1428 | } | |
4235b045 | 1429 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1430 | |
4235b045 | 1431 | tp->retprobe = (pr == 'r'); |
4de189fe | 1432 | |
190b57fc MH |
1433 | /* Scan module name(if there), function name and offset */ |
1434 | p = strchr(argv[1], ':'); | |
1435 | if (p) { | |
1436 | tp->module = strndup(argv[1], p - argv[1]); | |
1437 | p++; | |
1438 | } else | |
1439 | p = argv[1]; | |
bcbd0040 | 1440 | fmt1_str = strtok_r(p, "+", &fmt); |
5a6f6314 MH |
1441 | if (fmt1_str[0] == '0') /* only the address started with 0x */ |
1442 | tp->address = strtoul(fmt1_str, NULL, 0); | |
1443 | else { | |
1444 | /* Only the symbol-based probe has offset */ | |
1445 | tp->symbol = strdup(fmt1_str); | |
1446 | if (tp->symbol == NULL) { | |
1447 | ret = -ENOMEM; | |
1448 | goto out; | |
1449 | } | |
1450 | fmt2_str = strtok_r(NULL, "", &fmt); | |
1451 | if (fmt2_str == NULL) | |
1452 | tp->offset = 0; | |
1453 | else | |
1454 | tp->offset = strtoul(fmt2_str, NULL, 10); | |
bcbd0040 | 1455 | } |
4de189fe | 1456 | |
4235b045 | 1457 | tev->nargs = argc - 2; |
0e60836b | 1458 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1459 | if (tev->args == NULL) { |
1460 | ret = -ENOMEM; | |
1461 | goto out; | |
1462 | } | |
4235b045 | 1463 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1464 | p = strchr(argv[i + 2], '='); |
1465 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1466 | *p++ = '\0'; |
1467 | else | |
1468 | p = argv[i + 2]; | |
02b95dad | 1469 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1470 | /* TODO: parse regs and offset */ |
02b95dad MH |
1471 | tev->args[i].value = strdup(p); |
1472 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1473 | ret = -ENOMEM; | |
1474 | goto out; | |
1475 | } | |
4de189fe | 1476 | } |
146a1439 MH |
1477 | ret = 0; |
1478 | out: | |
bcbd0040 | 1479 | free(argv0_str); |
4de189fe | 1480 | argv_free(argv); |
146a1439 | 1481 | return ret; |
4de189fe MH |
1482 | } |
1483 | ||
7df2f329 MH |
1484 | /* Compose only probe arg */ |
1485 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
1486 | { | |
1487 | struct perf_probe_arg_field *field = pa->field; | |
1488 | int ret; | |
1489 | char *tmp = buf; | |
1490 | ||
48481938 MH |
1491 | if (pa->name && pa->var) |
1492 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
1493 | else | |
1494 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
1495 | if (ret <= 0) |
1496 | goto error; | |
1497 | tmp += ret; | |
1498 | len -= ret; | |
1499 | ||
1500 | while (field) { | |
b2a3c12b MH |
1501 | if (field->name[0] == '[') |
1502 | ret = e_snprintf(tmp, len, "%s", field->name); | |
1503 | else | |
1504 | ret = e_snprintf(tmp, len, "%s%s", | |
1505 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
1506 | if (ret <= 0) |
1507 | goto error; | |
1508 | tmp += ret; | |
1509 | len -= ret; | |
1510 | field = field->next; | |
1511 | } | |
11a1ca35 MH |
1512 | |
1513 | if (pa->type) { | |
1514 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
1515 | if (ret <= 0) | |
1516 | goto error; | |
1517 | tmp += ret; | |
1518 | len -= ret; | |
1519 | } | |
1520 | ||
7df2f329 MH |
1521 | return tmp - buf; |
1522 | error: | |
5f03cba4 | 1523 | pr_debug("Failed to synthesize perf probe argument: %d\n", ret); |
146a1439 | 1524 | return ret; |
7df2f329 MH |
1525 | } |
1526 | ||
4235b045 MH |
1527 | /* Compose only probe point (not argument) */ |
1528 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1529 | { |
fb1587d8 MH |
1530 | char *buf, *tmp; |
1531 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1532 | int ret, len; | |
4de189fe | 1533 | |
e334016f MH |
1534 | buf = zalloc(MAX_CMDLEN); |
1535 | if (buf == NULL) { | |
1536 | ret = -ENOMEM; | |
1537 | goto error; | |
1538 | } | |
4de189fe | 1539 | if (pp->offset) { |
fb1587d8 | 1540 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1541 | if (ret <= 0) |
1542 | goto error; | |
1543 | } | |
1544 | if (pp->line) { | |
fb1587d8 MH |
1545 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1546 | if (ret <= 0) | |
1547 | goto error; | |
1548 | } | |
1549 | if (pp->file) { | |
32ae2ade FBH |
1550 | tmp = pp->file; |
1551 | len = strlen(tmp); | |
1552 | if (len > 30) { | |
1553 | tmp = strchr(pp->file + len - 30, '/'); | |
1554 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1555 | } | |
1556 | ret = e_snprintf(file, 32, "@%s", tmp); | |
4de189fe MH |
1557 | if (ret <= 0) |
1558 | goto error; | |
1559 | } | |
1560 | ||
1561 | if (pp->function) | |
fb1587d8 MH |
1562 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1563 | offs, pp->retprobe ? "%return" : "", line, | |
1564 | file); | |
4de189fe | 1565 | else |
fb1587d8 | 1566 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1567 | if (ret <= 0) |
1568 | goto error; | |
1569 | ||
1570 | return buf; | |
7ef17aaf | 1571 | error: |
5f03cba4 | 1572 | pr_debug("Failed to synthesize perf probe point: %d\n", ret); |
f5385650 | 1573 | free(buf); |
146a1439 | 1574 | return NULL; |
7ef17aaf MH |
1575 | } |
1576 | ||
4235b045 MH |
1577 | #if 0 |
1578 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1579 | { |
1580 | char *buf; | |
1581 | int i, len, ret; | |
1582 | ||
4235b045 MH |
1583 | buf = synthesize_perf_probe_point(&pev->point); |
1584 | if (!buf) | |
1585 | return NULL; | |
4de189fe | 1586 | |
4235b045 MH |
1587 | len = strlen(buf); |
1588 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1589 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1590 | pev->args[i].name); |
1591 | if (ret <= 0) { | |
1592 | free(buf); | |
1593 | return NULL; | |
1594 | } | |
4de189fe MH |
1595 | len += ret; |
1596 | } | |
4de189fe | 1597 | |
4235b045 MH |
1598 | return buf; |
1599 | } | |
1600 | #endif | |
1601 | ||
0e60836b | 1602 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1603 | char **buf, size_t *buflen, |
1604 | int depth) | |
1605 | { | |
1606 | int ret; | |
1607 | if (ref->next) { | |
0e60836b | 1608 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1609 | buflen, depth + 1); |
1610 | if (depth < 0) | |
1611 | goto out; | |
1612 | } | |
1613 | ||
1614 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1615 | if (ret < 0) | |
1616 | depth = ret; | |
1617 | else { | |
1618 | *buf += ret; | |
1619 | *buflen -= ret; | |
1620 | } | |
1621 | out: | |
1622 | return depth; | |
4de189fe | 1623 | |
4de189fe MH |
1624 | } |
1625 | ||
0e60836b | 1626 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1627 | char *buf, size_t buflen) |
50656eec | 1628 | { |
0e60836b | 1629 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1630 | int ret, depth = 0; |
1631 | char *tmp = buf; | |
1632 | ||
1633 | /* Argument name or separator */ | |
1634 | if (arg->name) | |
1635 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1636 | else | |
1637 | ret = e_snprintf(buf, buflen, " "); | |
1638 | if (ret < 0) | |
1639 | return ret; | |
1640 | buf += ret; | |
1641 | buflen -= ret; | |
1642 | ||
b7dcb857 MH |
1643 | /* Special case: @XXX */ |
1644 | if (arg->value[0] == '@' && arg->ref) | |
1645 | ref = ref->next; | |
1646 | ||
4235b045 | 1647 | /* Dereferencing arguments */ |
b7dcb857 | 1648 | if (ref) { |
0e60836b | 1649 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1650 | &buflen, 1); |
1651 | if (depth < 0) | |
1652 | return depth; | |
1653 | } | |
1654 | ||
1655 | /* Print argument value */ | |
b7dcb857 MH |
1656 | if (arg->value[0] == '@' && arg->ref) |
1657 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1658 | arg->ref->offset); | |
1659 | else | |
1660 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1661 | if (ret < 0) |
1662 | return ret; | |
1663 | buf += ret; | |
1664 | buflen -= ret; | |
1665 | ||
1666 | /* Closing */ | |
1667 | while (depth--) { | |
1668 | ret = e_snprintf(buf, buflen, ")"); | |
1669 | if (ret < 0) | |
1670 | return ret; | |
1671 | buf += ret; | |
1672 | buflen -= ret; | |
1673 | } | |
4984912e MH |
1674 | /* Print argument type */ |
1675 | if (arg->type) { | |
1676 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1677 | if (ret <= 0) | |
1678 | return ret; | |
1679 | buf += ret; | |
1680 | } | |
4235b045 MH |
1681 | |
1682 | return buf - tmp; | |
1683 | } | |
1684 | ||
0e60836b | 1685 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1686 | { |
0e60836b | 1687 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1688 | char *buf; |
1689 | int i, len, ret; | |
1690 | ||
e334016f MH |
1691 | buf = zalloc(MAX_CMDLEN); |
1692 | if (buf == NULL) | |
1693 | return NULL; | |
1694 | ||
eb948e50 MH |
1695 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s ", tp->retprobe ? 'r' : 'p', |
1696 | tev->group, tev->event); | |
1697 | if (len <= 0) | |
1698 | goto error; | |
1699 | ||
1700 | /* Uprobes must have tp->address and tp->module */ | |
1701 | if (tev->uprobes && (!tp->address || !tp->module)) | |
1702 | goto error; | |
1703 | ||
1704 | /* Use the tp->address for uprobes */ | |
225466f1 | 1705 | if (tev->uprobes) |
eb948e50 MH |
1706 | ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s:0x%lx", |
1707 | tp->module, tp->address); | |
225466f1 | 1708 | else |
eb948e50 | 1709 | ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s%s%s+%lu", |
225466f1 SD |
1710 | tp->module ?: "", tp->module ? ":" : "", |
1711 | tp->symbol, tp->offset); | |
1712 | ||
eb948e50 | 1713 | if (ret <= 0) |
50656eec | 1714 | goto error; |
eb948e50 | 1715 | len += ret; |
50656eec | 1716 | |
4235b045 | 1717 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1718 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1719 | MAX_CMDLEN - len); |
4de189fe | 1720 | if (ret <= 0) |
50656eec MH |
1721 | goto error; |
1722 | len += ret; | |
1723 | } | |
50656eec | 1724 | |
4235b045 | 1725 | return buf; |
50656eec | 1726 | error: |
4235b045 MH |
1727 | free(buf); |
1728 | return NULL; | |
1729 | } | |
50656eec | 1730 | |
5a6f6314 MH |
1731 | static int find_perf_probe_point_from_map(struct probe_trace_point *tp, |
1732 | struct perf_probe_point *pp, | |
1733 | bool is_kprobe) | |
1734 | { | |
1735 | struct symbol *sym = NULL; | |
1736 | struct map *map; | |
1737 | u64 addr; | |
1738 | int ret = -ENOENT; | |
1739 | ||
1740 | if (!is_kprobe) { | |
1741 | map = dso__new_map(tp->module); | |
1742 | if (!map) | |
1743 | goto out; | |
1744 | addr = tp->address; | |
1745 | sym = map__find_symbol(map, addr, NULL); | |
1746 | } else { | |
1747 | addr = kernel_get_symbol_address_by_name(tp->symbol, true); | |
1748 | if (addr) { | |
1749 | addr += tp->offset; | |
1750 | sym = __find_kernel_function(addr, &map); | |
1751 | } | |
1752 | } | |
1753 | if (!sym) | |
1754 | goto out; | |
1755 | ||
1756 | pp->retprobe = tp->retprobe; | |
1757 | pp->offset = addr - map->unmap_ip(map, sym->start); | |
1758 | pp->function = strdup(sym->name); | |
1759 | ret = pp->function ? 0 : -ENOMEM; | |
1760 | ||
1761 | out: | |
1762 | if (map && !is_kprobe) { | |
1763 | dso__delete(map->dso); | |
1764 | map__delete(map); | |
1765 | } | |
1766 | ||
1767 | return ret; | |
1768 | } | |
1769 | ||
1770 | static int convert_to_perf_probe_point(struct probe_trace_point *tp, | |
1771 | struct perf_probe_point *pp, | |
1772 | bool is_kprobe) | |
1773 | { | |
1774 | char buf[128]; | |
1775 | int ret; | |
1776 | ||
1777 | ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe); | |
1778 | if (!ret) | |
1779 | return 0; | |
1780 | ret = find_perf_probe_point_from_map(tp, pp, is_kprobe); | |
1781 | if (!ret) | |
1782 | return 0; | |
1783 | ||
1784 | pr_debug("Failed to find probe point from both of dwarf and map.\n"); | |
1785 | ||
1786 | if (tp->symbol) { | |
1787 | pp->function = strdup(tp->symbol); | |
1788 | pp->offset = tp->offset; | |
1789 | } else if (!tp->module && !is_kprobe) { | |
1790 | ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address); | |
1791 | if (ret < 0) | |
1792 | return ret; | |
1793 | pp->function = strdup(buf); | |
1794 | pp->offset = 0; | |
1795 | } | |
1796 | if (pp->function == NULL) | |
1797 | return -ENOMEM; | |
1798 | ||
1799 | pp->retprobe = tp->retprobe; | |
1800 | ||
1801 | return 0; | |
1802 | } | |
1803 | ||
0e60836b | 1804 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
225466f1 | 1805 | struct perf_probe_event *pev, bool is_kprobe) |
4235b045 | 1806 | { |
02b95dad | 1807 | char buf[64] = ""; |
146a1439 | 1808 | int i, ret; |
4235b045 | 1809 | |
4b4da7f7 | 1810 | /* Convert event/group name */ |
02b95dad MH |
1811 | pev->event = strdup(tev->event); |
1812 | pev->group = strdup(tev->group); | |
1813 | if (pev->event == NULL || pev->group == NULL) | |
1814 | return -ENOMEM; | |
fb1587d8 | 1815 | |
4b4da7f7 | 1816 | /* Convert trace_point to probe_point */ |
5a6f6314 | 1817 | ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe); |
146a1439 MH |
1818 | if (ret < 0) |
1819 | return ret; | |
4b4da7f7 | 1820 | |
4235b045 MH |
1821 | /* Convert trace_arg to probe_arg */ |
1822 | pev->nargs = tev->nargs; | |
e334016f MH |
1823 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1824 | if (pev->args == NULL) | |
1825 | return -ENOMEM; | |
02b95dad | 1826 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1827 | if (tev->args[i].name) |
02b95dad | 1828 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1829 | else { |
0e60836b | 1830 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1831 | buf, 64); |
02b95dad | 1832 | pev->args[i].name = strdup(buf); |
4235b045 | 1833 | } |
02b95dad MH |
1834 | if (pev->args[i].name == NULL && ret >= 0) |
1835 | ret = -ENOMEM; | |
1836 | } | |
146a1439 MH |
1837 | |
1838 | if (ret < 0) | |
1839 | clear_perf_probe_event(pev); | |
1840 | ||
1841 | return ret; | |
4235b045 MH |
1842 | } |
1843 | ||
1844 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1845 | { | |
7df2f329 | 1846 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1847 | int i; |
1848 | ||
f5385650 ACM |
1849 | free(pev->event); |
1850 | free(pev->group); | |
7afb3fab | 1851 | free(pev->target); |
9b118aca | 1852 | clear_perf_probe_point(&pev->point); |
f5385650 | 1853 | |
7df2f329 | 1854 | for (i = 0; i < pev->nargs; i++) { |
f5385650 ACM |
1855 | free(pev->args[i].name); |
1856 | free(pev->args[i].var); | |
1857 | free(pev->args[i].type); | |
7df2f329 MH |
1858 | field = pev->args[i].field; |
1859 | while (field) { | |
1860 | next = field->next; | |
74cf249d | 1861 | zfree(&field->name); |
7df2f329 MH |
1862 | free(field); |
1863 | field = next; | |
1864 | } | |
1865 | } | |
f5385650 | 1866 | free(pev->args); |
4235b045 MH |
1867 | memset(pev, 0, sizeof(*pev)); |
1868 | } | |
1869 | ||
0e60836b | 1870 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1871 | { |
0e60836b | 1872 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1873 | int i; |
1874 | ||
f5385650 ACM |
1875 | free(tev->event); |
1876 | free(tev->group); | |
1877 | free(tev->point.symbol); | |
1878 | free(tev->point.module); | |
4235b045 | 1879 | for (i = 0; i < tev->nargs; i++) { |
f5385650 ACM |
1880 | free(tev->args[i].name); |
1881 | free(tev->args[i].value); | |
1882 | free(tev->args[i].type); | |
4235b045 MH |
1883 | ref = tev->args[i].ref; |
1884 | while (ref) { | |
1885 | next = ref->next; | |
1886 | free(ref); | |
1887 | ref = next; | |
1888 | } | |
1889 | } | |
f5385650 | 1890 | free(tev->args); |
4235b045 | 1891 | memset(tev, 0, sizeof(*tev)); |
50656eec MH |
1892 | } |
1893 | ||
5e45187c | 1894 | static void print_open_warning(int err, bool is_kprobe) |
225466f1 | 1895 | { |
5f03cba4 | 1896 | char sbuf[STRERR_BUFSIZE]; |
225466f1 | 1897 | |
5e45187c | 1898 | if (err == -ENOENT) { |
225466f1 SD |
1899 | const char *config; |
1900 | ||
1901 | if (!is_kprobe) | |
1902 | config = "CONFIG_UPROBE_EVENTS"; | |
1903 | else | |
1904 | config = "CONFIG_KPROBE_EVENTS"; | |
1905 | ||
5e45187c MH |
1906 | pr_warning("%cprobe_events file does not exist" |
1907 | " - please rebuild kernel with %s.\n", | |
1908 | is_kprobe ? 'k' : 'u', config); | |
1909 | } else if (err == -ENOTSUP) | |
23773ca1 | 1910 | pr_warning("Tracefs or debugfs is not mounted.\n"); |
5e45187c MH |
1911 | else |
1912 | pr_warning("Failed to open %cprobe_events: %s\n", | |
1913 | is_kprobe ? 'k' : 'u', | |
1914 | strerror_r(-err, sbuf, sizeof(sbuf))); | |
225466f1 SD |
1915 | } |
1916 | ||
467ec085 MH |
1917 | static void print_both_open_warning(int kerr, int uerr) |
1918 | { | |
1919 | /* Both kprobes and uprobes are disabled, warn it. */ | |
1920 | if (kerr == -ENOTSUP && uerr == -ENOTSUP) | |
23773ca1 | 1921 | pr_warning("Tracefs or debugfs is not mounted.\n"); |
467ec085 MH |
1922 | else if (kerr == -ENOENT && uerr == -ENOENT) |
1923 | pr_warning("Please rebuild kernel with CONFIG_KPROBE_EVENTS " | |
1924 | "or/and CONFIG_UPROBE_EVENTS.\n"); | |
1925 | else { | |
5f03cba4 | 1926 | char sbuf[STRERR_BUFSIZE]; |
467ec085 MH |
1927 | pr_warning("Failed to open kprobe events: %s.\n", |
1928 | strerror_r(-kerr, sbuf, sizeof(sbuf))); | |
1929 | pr_warning("Failed to open uprobe events: %s.\n", | |
1930 | strerror_r(-uerr, sbuf, sizeof(sbuf))); | |
1931 | } | |
1932 | } | |
1933 | ||
5e45187c | 1934 | static int open_probe_events(const char *trace_file, bool readwrite) |
4de189fe MH |
1935 | { |
1936 | char buf[PATH_MAX]; | |
7ca5989d | 1937 | const char *__debugfs; |
23773ca1 | 1938 | const char *tracing_dir = ""; |
4de189fe MH |
1939 | int ret; |
1940 | ||
23773ca1 SRRH |
1941 | __debugfs = tracefs_find_mountpoint(); |
1942 | if (__debugfs == NULL) { | |
1943 | tracing_dir = "tracing/"; | |
7ca5989d | 1944 | |
23773ca1 SRRH |
1945 | __debugfs = debugfs_find_mountpoint(); |
1946 | if (__debugfs == NULL) | |
1947 | return -ENOTSUP; | |
1948 | } | |
1949 | ||
1950 | ret = e_snprintf(buf, PATH_MAX, "%s/%s%s", | |
1951 | __debugfs, tracing_dir, trace_file); | |
146a1439 | 1952 | if (ret >= 0) { |
7ca5989d | 1953 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1954 | if (readwrite && !probe_event_dry_run) |
1955 | ret = open(buf, O_RDWR, O_APPEND); | |
1956 | else | |
1957 | ret = open(buf, O_RDONLY, 0); | |
f4d7da49 | 1958 | |
225466f1 | 1959 | if (ret < 0) |
5e45187c | 1960 | ret = -errno; |
4de189fe MH |
1961 | } |
1962 | return ret; | |
1963 | } | |
1964 | ||
225466f1 SD |
1965 | static int open_kprobe_events(bool readwrite) |
1966 | { | |
23773ca1 | 1967 | return open_probe_events("kprobe_events", readwrite); |
225466f1 SD |
1968 | } |
1969 | ||
1970 | static int open_uprobe_events(bool readwrite) | |
1971 | { | |
23773ca1 | 1972 | return open_probe_events("uprobe_events", readwrite); |
225466f1 SD |
1973 | } |
1974 | ||
1975 | /* Get raw string list of current kprobe_events or uprobe_events */ | |
0e60836b | 1976 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1977 | { |
1978 | int ret, idx; | |
1979 | FILE *fp; | |
1980 | char buf[MAX_CMDLEN]; | |
1981 | char *p; | |
1982 | struct strlist *sl; | |
1983 | ||
1984 | sl = strlist__new(true, NULL); | |
1985 | ||
1986 | fp = fdopen(dup(fd), "r"); | |
1987 | while (!feof(fp)) { | |
1988 | p = fgets(buf, MAX_CMDLEN, fp); | |
1989 | if (!p) | |
1990 | break; | |
1991 | ||
1992 | idx = strlen(p) - 1; | |
1993 | if (p[idx] == '\n') | |
1994 | p[idx] = '\0'; | |
1995 | ret = strlist__add(sl, buf); | |
146a1439 | 1996 | if (ret < 0) { |
6eb08660 | 1997 | pr_debug("strlist__add failed (%d)\n", ret); |
146a1439 MH |
1998 | strlist__delete(sl); |
1999 | return NULL; | |
2000 | } | |
4de189fe MH |
2001 | } |
2002 | fclose(fp); | |
2003 | ||
2004 | return sl; | |
2005 | } | |
2006 | ||
9aaf5a5f MH |
2007 | struct kprobe_blacklist_node { |
2008 | struct list_head list; | |
2009 | unsigned long start; | |
2010 | unsigned long end; | |
2011 | char *symbol; | |
2012 | }; | |
2013 | ||
2014 | static void kprobe_blacklist__delete(struct list_head *blacklist) | |
2015 | { | |
2016 | struct kprobe_blacklist_node *node; | |
2017 | ||
2018 | while (!list_empty(blacklist)) { | |
2019 | node = list_first_entry(blacklist, | |
2020 | struct kprobe_blacklist_node, list); | |
2021 | list_del(&node->list); | |
2022 | free(node->symbol); | |
2023 | free(node); | |
2024 | } | |
2025 | } | |
2026 | ||
2027 | static int kprobe_blacklist__load(struct list_head *blacklist) | |
2028 | { | |
2029 | struct kprobe_blacklist_node *node; | |
2030 | const char *__debugfs = debugfs_find_mountpoint(); | |
2031 | char buf[PATH_MAX], *p; | |
2032 | FILE *fp; | |
2033 | int ret; | |
2034 | ||
2035 | if (__debugfs == NULL) | |
2036 | return -ENOTSUP; | |
2037 | ||
2038 | ret = e_snprintf(buf, PATH_MAX, "%s/kprobes/blacklist", __debugfs); | |
2039 | if (ret < 0) | |
2040 | return ret; | |
2041 | ||
2042 | fp = fopen(buf, "r"); | |
2043 | if (!fp) | |
2044 | return -errno; | |
2045 | ||
2046 | ret = 0; | |
2047 | while (fgets(buf, PATH_MAX, fp)) { | |
2048 | node = zalloc(sizeof(*node)); | |
2049 | if (!node) { | |
2050 | ret = -ENOMEM; | |
2051 | break; | |
2052 | } | |
2053 | INIT_LIST_HEAD(&node->list); | |
2054 | list_add_tail(&node->list, blacklist); | |
2055 | if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) { | |
2056 | ret = -EINVAL; | |
2057 | break; | |
2058 | } | |
2059 | p = strchr(buf, '\t'); | |
2060 | if (p) { | |
2061 | p++; | |
2062 | if (p[strlen(p) - 1] == '\n') | |
2063 | p[strlen(p) - 1] = '\0'; | |
2064 | } else | |
2065 | p = (char *)"unknown"; | |
2066 | node->symbol = strdup(p); | |
2067 | if (!node->symbol) { | |
2068 | ret = -ENOMEM; | |
2069 | break; | |
2070 | } | |
2071 | pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n", | |
2072 | node->start, node->end, node->symbol); | |
2073 | ret++; | |
2074 | } | |
2075 | if (ret < 0) | |
2076 | kprobe_blacklist__delete(blacklist); | |
2077 | fclose(fp); | |
2078 | ||
2079 | return ret; | |
2080 | } | |
2081 | ||
2082 | static struct kprobe_blacklist_node * | |
2083 | kprobe_blacklist__find_by_address(struct list_head *blacklist, | |
2084 | unsigned long address) | |
2085 | { | |
2086 | struct kprobe_blacklist_node *node; | |
2087 | ||
2088 | list_for_each_entry(node, blacklist, list) { | |
2089 | if (node->start <= address && address <= node->end) | |
2090 | return node; | |
2091 | } | |
2092 | ||
2093 | return NULL; | |
2094 | } | |
2095 | ||
278498d4 | 2096 | /* Show an event */ |
fb226ccd MH |
2097 | static int show_perf_probe_event(struct perf_probe_event *pev, |
2098 | const char *module) | |
278498d4 | 2099 | { |
7e990a51 | 2100 | int i, ret; |
278498d4 | 2101 | char buf[128]; |
4235b045 | 2102 | char *place; |
278498d4 | 2103 | |
4235b045 MH |
2104 | /* Synthesize only event probe point */ |
2105 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
2106 | if (!place) |
2107 | return -EINVAL; | |
4235b045 MH |
2108 | |
2109 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 2110 | if (ret < 0) |
146a1439 MH |
2111 | return ret; |
2112 | ||
5e17b28f | 2113 | pr_info(" %-20s (on %s", buf, place); |
fb226ccd | 2114 | if (module) |
5e17b28f | 2115 | pr_info(" in %s", module); |
278498d4 | 2116 | |
4235b045 | 2117 | if (pev->nargs > 0) { |
5e17b28f | 2118 | pr_info(" with"); |
7df2f329 | 2119 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
2120 | ret = synthesize_perf_probe_arg(&pev->args[i], |
2121 | buf, 128); | |
2122 | if (ret < 0) | |
2123 | break; | |
5e17b28f | 2124 | pr_info(" %s", buf); |
7df2f329 | 2125 | } |
278498d4 | 2126 | } |
5e17b28f | 2127 | pr_info(")\n"); |
4235b045 | 2128 | free(place); |
146a1439 | 2129 | return ret; |
278498d4 MH |
2130 | } |
2131 | ||
225466f1 | 2132 | static int __show_perf_probe_events(int fd, bool is_kprobe) |
4de189fe | 2133 | { |
225466f1 | 2134 | int ret = 0; |
0e60836b | 2135 | struct probe_trace_event tev; |
4235b045 | 2136 | struct perf_probe_event pev; |
4de189fe MH |
2137 | struct strlist *rawlist; |
2138 | struct str_node *ent; | |
2139 | ||
4235b045 MH |
2140 | memset(&tev, 0, sizeof(tev)); |
2141 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 2142 | |
0e60836b | 2143 | rawlist = get_probe_trace_command_rawlist(fd); |
146a1439 | 2144 | if (!rawlist) |
6eb08660 | 2145 | return -ENOMEM; |
4de189fe | 2146 | |
adf365f4 | 2147 | strlist__for_each(ent, rawlist) { |
0e60836b | 2148 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 | 2149 | if (ret >= 0) { |
225466f1 SD |
2150 | ret = convert_to_perf_probe_event(&tev, &pev, |
2151 | is_kprobe); | |
146a1439 | 2152 | if (ret >= 0) |
fb226ccd MH |
2153 | ret = show_perf_probe_event(&pev, |
2154 | tev.point.module); | |
146a1439 | 2155 | } |
4235b045 | 2156 | clear_perf_probe_event(&pev); |
0e60836b | 2157 | clear_probe_trace_event(&tev); |
146a1439 MH |
2158 | if (ret < 0) |
2159 | break; | |
4de189fe | 2160 | } |
4de189fe | 2161 | strlist__delete(rawlist); |
146a1439 MH |
2162 | |
2163 | return ret; | |
4de189fe MH |
2164 | } |
2165 | ||
225466f1 SD |
2166 | /* List up current perf-probe events */ |
2167 | int show_perf_probe_events(void) | |
2168 | { | |
5e45187c | 2169 | int kp_fd, up_fd, ret; |
225466f1 SD |
2170 | |
2171 | setup_pager(); | |
225466f1 | 2172 | |
ee45b6c2 | 2173 | ret = init_symbol_maps(false); |
225466f1 SD |
2174 | if (ret < 0) |
2175 | return ret; | |
2176 | ||
5e45187c MH |
2177 | kp_fd = open_kprobe_events(false); |
2178 | if (kp_fd >= 0) { | |
2179 | ret = __show_perf_probe_events(kp_fd, true); | |
2180 | close(kp_fd); | |
2181 | if (ret < 0) | |
2182 | goto out; | |
2183 | } | |
225466f1 | 2184 | |
5e45187c MH |
2185 | up_fd = open_uprobe_events(false); |
2186 | if (kp_fd < 0 && up_fd < 0) { | |
467ec085 | 2187 | print_both_open_warning(kp_fd, up_fd); |
5e45187c MH |
2188 | ret = kp_fd; |
2189 | goto out; | |
225466f1 SD |
2190 | } |
2191 | ||
5e45187c MH |
2192 | if (up_fd >= 0) { |
2193 | ret = __show_perf_probe_events(up_fd, false); | |
2194 | close(up_fd); | |
2195 | } | |
2196 | out: | |
ee45b6c2 | 2197 | exit_symbol_maps(); |
225466f1 SD |
2198 | return ret; |
2199 | } | |
2200 | ||
b498ce1f | 2201 | /* Get current perf-probe event names */ |
0e60836b | 2202 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 2203 | { |
fa28244d | 2204 | char buf[128]; |
b498ce1f MH |
2205 | struct strlist *sl, *rawlist; |
2206 | struct str_node *ent; | |
0e60836b | 2207 | struct probe_trace_event tev; |
146a1439 | 2208 | int ret = 0; |
b498ce1f | 2209 | |
4235b045 | 2210 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 2211 | rawlist = get_probe_trace_command_rawlist(fd); |
6eb08660 MH |
2212 | if (!rawlist) |
2213 | return NULL; | |
e1d2017b | 2214 | sl = strlist__new(true, NULL); |
adf365f4 | 2215 | strlist__for_each(ent, rawlist) { |
0e60836b | 2216 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
2217 | if (ret < 0) |
2218 | break; | |
fa28244d | 2219 | if (include_group) { |
146a1439 MH |
2220 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
2221 | tev.event); | |
2222 | if (ret >= 0) | |
2223 | ret = strlist__add(sl, buf); | |
fa28244d | 2224 | } else |
146a1439 | 2225 | ret = strlist__add(sl, tev.event); |
0e60836b | 2226 | clear_probe_trace_event(&tev); |
146a1439 MH |
2227 | if (ret < 0) |
2228 | break; | |
b498ce1f | 2229 | } |
b498ce1f MH |
2230 | strlist__delete(rawlist); |
2231 | ||
146a1439 MH |
2232 | if (ret < 0) { |
2233 | strlist__delete(sl); | |
2234 | return NULL; | |
2235 | } | |
b498ce1f MH |
2236 | return sl; |
2237 | } | |
2238 | ||
0e60836b | 2239 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 2240 | { |
6eca8cc3 | 2241 | int ret = 0; |
0e60836b | 2242 | char *buf = synthesize_probe_trace_command(tev); |
5f03cba4 | 2243 | char sbuf[STRERR_BUFSIZE]; |
50656eec | 2244 | |
146a1439 | 2245 | if (!buf) { |
0e60836b | 2246 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
2247 | return -EINVAL; |
2248 | } | |
2249 | ||
fa28244d | 2250 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
2251 | if (!probe_event_dry_run) { |
2252 | ret = write(fd, buf, strlen(buf)); | |
7949ba1f NK |
2253 | if (ret <= 0) { |
2254 | ret = -errno; | |
146a1439 | 2255 | pr_warning("Failed to write event: %s\n", |
5f03cba4 | 2256 | strerror_r(errno, sbuf, sizeof(sbuf))); |
7949ba1f | 2257 | } |
f4d7da49 | 2258 | } |
4235b045 | 2259 | free(buf); |
146a1439 | 2260 | return ret; |
50656eec MH |
2261 | } |
2262 | ||
146a1439 MH |
2263 | static int get_new_event_name(char *buf, size_t len, const char *base, |
2264 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
2265 | { |
2266 | int i, ret; | |
17f88fcd MH |
2267 | |
2268 | /* Try no suffix */ | |
2269 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 | 2270 | if (ret < 0) { |
5f03cba4 | 2271 | pr_debug("snprintf() failed: %d\n", ret); |
146a1439 MH |
2272 | return ret; |
2273 | } | |
17f88fcd | 2274 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 2275 | return 0; |
17f88fcd | 2276 | |
d761b08b MH |
2277 | if (!allow_suffix) { |
2278 | pr_warning("Error: event \"%s\" already exists. " | |
2279 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 2280 | return -EEXIST; |
d761b08b MH |
2281 | } |
2282 | ||
17f88fcd MH |
2283 | /* Try to add suffix */ |
2284 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 2285 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 | 2286 | if (ret < 0) { |
5f03cba4 | 2287 | pr_debug("snprintf() failed: %d\n", ret); |
146a1439 MH |
2288 | return ret; |
2289 | } | |
b498ce1f MH |
2290 | if (!strlist__has_entry(namelist, buf)) |
2291 | break; | |
2292 | } | |
146a1439 MH |
2293 | if (i == MAX_EVENT_INDEX) { |
2294 | pr_warning("Too many events are on the same function.\n"); | |
2295 | ret = -ERANGE; | |
2296 | } | |
2297 | ||
2298 | return ret; | |
b498ce1f MH |
2299 | } |
2300 | ||
79702f61 MH |
2301 | /* Warn if the current kernel's uprobe implementation is old */ |
2302 | static void warn_uprobe_event_compat(struct probe_trace_event *tev) | |
2303 | { | |
2304 | int i; | |
2305 | char *buf = synthesize_probe_trace_command(tev); | |
2306 | ||
2307 | /* Old uprobe event doesn't support memory dereference */ | |
2308 | if (!tev->uprobes || tev->nargs == 0 || !buf) | |
2309 | goto out; | |
2310 | ||
2311 | for (i = 0; i < tev->nargs; i++) | |
2312 | if (strglobmatch(tev->args[i].value, "[$@+-]*")) { | |
2313 | pr_warning("Please upgrade your kernel to at least " | |
2314 | "3.14 to have access to feature %s\n", | |
2315 | tev->args[i].value); | |
2316 | break; | |
2317 | } | |
2318 | out: | |
2319 | free(buf); | |
2320 | } | |
2321 | ||
0e60836b SD |
2322 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
2323 | struct probe_trace_event *tevs, | |
146a1439 | 2324 | int ntevs, bool allow_suffix) |
50656eec | 2325 | { |
146a1439 | 2326 | int i, fd, ret; |
0e60836b | 2327 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
2328 | char buf[64]; |
2329 | const char *event, *group; | |
b498ce1f | 2330 | struct strlist *namelist; |
9aaf5a5f MH |
2331 | LIST_HEAD(blacklist); |
2332 | struct kprobe_blacklist_node *node; | |
50656eec | 2333 | |
225466f1 SD |
2334 | if (pev->uprobes) |
2335 | fd = open_uprobe_events(true); | |
2336 | else | |
2337 | fd = open_kprobe_events(true); | |
2338 | ||
5e45187c MH |
2339 | if (fd < 0) { |
2340 | print_open_warning(fd, !pev->uprobes); | |
146a1439 | 2341 | return fd; |
5e45187c MH |
2342 | } |
2343 | ||
b498ce1f | 2344 | /* Get current event names */ |
0e60836b | 2345 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
2346 | if (!namelist) { |
2347 | pr_debug("Failed to get current event list.\n"); | |
2348 | return -EIO; | |
2349 | } | |
9aaf5a5f MH |
2350 | /* Get kprobe blacklist if exists */ |
2351 | if (!pev->uprobes) { | |
2352 | ret = kprobe_blacklist__load(&blacklist); | |
2353 | if (ret < 0) | |
2354 | pr_debug("No kprobe blacklist support, ignored\n"); | |
2355 | } | |
4235b045 | 2356 | |
146a1439 | 2357 | ret = 0; |
5e17b28f | 2358 | pr_info("Added new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 2359 | for (i = 0; i < ntevs; i++) { |
4235b045 | 2360 | tev = &tevs[i]; |
9aaf5a5f MH |
2361 | /* Ensure that the address is NOT blacklisted */ |
2362 | node = kprobe_blacklist__find_by_address(&blacklist, | |
2363 | tev->point.address); | |
2364 | if (node) { | |
2365 | pr_warning("Warning: Skipped probing on blacklisted function: %s\n", node->symbol); | |
2366 | continue; | |
2367 | } | |
2368 | ||
4235b045 MH |
2369 | if (pev->event) |
2370 | event = pev->event; | |
2371 | else | |
2372 | if (pev->point.function) | |
2373 | event = pev->point.function; | |
2374 | else | |
2375 | event = tev->point.symbol; | |
2376 | if (pev->group) | |
2377 | group = pev->group; | |
2378 | else | |
2379 | group = PERFPROBE_GROUP; | |
2380 | ||
2381 | /* Get an unused new event name */ | |
146a1439 MH |
2382 | ret = get_new_event_name(buf, 64, event, |
2383 | namelist, allow_suffix); | |
2384 | if (ret < 0) | |
2385 | break; | |
4235b045 MH |
2386 | event = buf; |
2387 | ||
02b95dad MH |
2388 | tev->event = strdup(event); |
2389 | tev->group = strdup(group); | |
2390 | if (tev->event == NULL || tev->group == NULL) { | |
2391 | ret = -ENOMEM; | |
2392 | break; | |
2393 | } | |
0e60836b | 2394 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
2395 | if (ret < 0) |
2396 | break; | |
4235b045 MH |
2397 | /* Add added event name to namelist */ |
2398 | strlist__add(namelist, event); | |
2399 | ||
2400 | /* Trick here - save current event/group */ | |
2401 | event = pev->event; | |
2402 | group = pev->group; | |
2403 | pev->event = tev->event; | |
2404 | pev->group = tev->group; | |
fb226ccd | 2405 | show_perf_probe_event(pev, tev->point.module); |
4235b045 MH |
2406 | /* Trick here - restore current event/group */ |
2407 | pev->event = (char *)event; | |
2408 | pev->group = (char *)group; | |
2409 | ||
2410 | /* | |
2411 | * Probes after the first probe which comes from same | |
2412 | * user input are always allowed to add suffix, because | |
2413 | * there might be several addresses corresponding to | |
2414 | * one code line. | |
2415 | */ | |
2416 | allow_suffix = true; | |
50656eec | 2417 | } |
79702f61 MH |
2418 | if (ret == -EINVAL && pev->uprobes) |
2419 | warn_uprobe_event_compat(tev); | |
146a1439 | 2420 | |
9aaf5a5f MH |
2421 | /* Note that it is possible to skip all events because of blacklist */ |
2422 | if (ret >= 0 && tev->event) { | |
146a1439 | 2423 | /* Show how to use the event. */ |
5e17b28f MH |
2424 | pr_info("\nYou can now use it in all perf tools, such as:\n\n"); |
2425 | pr_info("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
146a1439 MH |
2426 | tev->event); |
2427 | } | |
a9b495b0 | 2428 | |
9aaf5a5f | 2429 | kprobe_blacklist__delete(&blacklist); |
e1d2017b | 2430 | strlist__delete(namelist); |
50656eec | 2431 | close(fd); |
146a1439 | 2432 | return ret; |
50656eec | 2433 | } |
fa28244d | 2434 | |
564c62a4 | 2435 | static int find_probe_functions(struct map *map, char *name) |
eb948e50 | 2436 | { |
564c62a4 | 2437 | int found = 0; |
0a3873a8 | 2438 | struct symbol *sym; |
564c62a4 | 2439 | |
0a3873a8 | 2440 | map__for_each_symbol_by_name(map, name, sym) { |
e578da3b | 2441 | found++; |
eb948e50 | 2442 | } |
564c62a4 NK |
2443 | |
2444 | return found; | |
eb948e50 MH |
2445 | } |
2446 | ||
2447 | #define strdup_or_goto(str, label) \ | |
2448 | ({ char *__p = strdup(str); if (!__p) goto label; __p; }) | |
2449 | ||
2450 | /* | |
2451 | * Find probe function addresses from map. | |
2452 | * Return an error or the number of found probe_trace_event | |
2453 | */ | |
2454 | static int find_probe_trace_events_from_map(struct perf_probe_event *pev, | |
2455 | struct probe_trace_event **tevs, | |
2456 | int max_tevs, const char *target) | |
e0faa8d3 | 2457 | { |
eb948e50 | 2458 | struct map *map = NULL; |
eb948e50 | 2459 | struct ref_reloc_sym *reloc_sym = NULL; |
e0faa8d3 | 2460 | struct symbol *sym; |
0e60836b | 2461 | struct probe_trace_event *tev; |
eb948e50 MH |
2462 | struct perf_probe_point *pp = &pev->point; |
2463 | struct probe_trace_point *tp; | |
564c62a4 | 2464 | int num_matched_functions; |
eb948e50 | 2465 | int ret, i; |
4235b045 | 2466 | |
9b118aca | 2467 | map = get_target_map(target, pev->uprobes); |
eb948e50 MH |
2468 | if (!map) { |
2469 | ret = -EINVAL; | |
2470 | goto out; | |
fb7345bb MH |
2471 | } |
2472 | ||
eb948e50 MH |
2473 | /* |
2474 | * Load matched symbols: Since the different local symbols may have | |
2475 | * same name but different addresses, this lists all the symbols. | |
2476 | */ | |
564c62a4 NK |
2477 | num_matched_functions = find_probe_functions(map, pp->function); |
2478 | if (num_matched_functions == 0) { | |
eb948e50 MH |
2479 | pr_err("Failed to find symbol %s in %s\n", pp->function, |
2480 | target ? : "kernel"); | |
2481 | ret = -ENOENT; | |
2482 | goto out; | |
2483 | } else if (num_matched_functions > max_tevs) { | |
2484 | pr_err("Too many functions matched in %s\n", | |
2485 | target ? : "kernel"); | |
2486 | ret = -E2BIG; | |
2487 | goto out; | |
fb7345bb MH |
2488 | } |
2489 | ||
25dd9171 | 2490 | if (!pev->uprobes && !pp->retprobe) { |
0560a0c4 | 2491 | reloc_sym = kernel_get_ref_reloc_sym(); |
eb948e50 MH |
2492 | if (!reloc_sym) { |
2493 | pr_warning("Relocated base symbol is not found!\n"); | |
2494 | ret = -EINVAL; | |
2495 | goto out; | |
2496 | } | |
2497 | } | |
4235b045 | 2498 | |
eb948e50 MH |
2499 | /* Setup result trace-probe-events */ |
2500 | *tevs = zalloc(sizeof(*tev) * num_matched_functions); | |
2501 | if (!*tevs) { | |
02b95dad | 2502 | ret = -ENOMEM; |
eb948e50 | 2503 | goto out; |
02b95dad | 2504 | } |
ce27a443 | 2505 | |
eb948e50 | 2506 | ret = 0; |
564c62a4 | 2507 | |
0a3873a8 | 2508 | map__for_each_symbol_by_name(map, pp->function, sym) { |
eb948e50 MH |
2509 | tev = (*tevs) + ret; |
2510 | tp = &tev->point; | |
2511 | if (ret == num_matched_functions) { | |
2512 | pr_warning("Too many symbols are listed. Skip it.\n"); | |
2513 | break; | |
ce27a443 | 2514 | } |
eb948e50 | 2515 | ret++; |
ce27a443 | 2516 | |
eb948e50 MH |
2517 | if (pp->offset > sym->end - sym->start) { |
2518 | pr_warning("Offset %ld is bigger than the size of %s\n", | |
2519 | pp->offset, sym->name); | |
2520 | ret = -ENOENT; | |
2521 | goto err_out; | |
2522 | } | |
2523 | /* Add one probe point */ | |
2524 | tp->address = map->unmap_ip(map, sym->start) + pp->offset; | |
2525 | if (reloc_sym) { | |
2526 | tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out); | |
2527 | tp->offset = tp->address - reloc_sym->addr; | |
2528 | } else { | |
2529 | tp->symbol = strdup_or_goto(sym->name, nomem_out); | |
2530 | tp->offset = pp->offset; | |
2531 | } | |
2532 | tp->retprobe = pp->retprobe; | |
2533 | if (target) | |
2534 | tev->point.module = strdup_or_goto(target, nomem_out); | |
2535 | tev->uprobes = pev->uprobes; | |
2536 | tev->nargs = pev->nargs; | |
2537 | if (tev->nargs) { | |
2538 | tev->args = zalloc(sizeof(struct probe_trace_arg) * | |
2539 | tev->nargs); | |
2540 | if (tev->args == NULL) | |
2541 | goto nomem_out; | |
e334016f | 2542 | } |
48481938 | 2543 | for (i = 0; i < tev->nargs; i++) { |
eb948e50 MH |
2544 | if (pev->args[i].name) |
2545 | tev->args[i].name = | |
2546 | strdup_or_goto(pev->args[i].name, | |
2547 | nomem_out); | |
2548 | ||
2549 | tev->args[i].value = strdup_or_goto(pev->args[i].var, | |
2550 | nomem_out); | |
2551 | if (pev->args[i].type) | |
2552 | tev->args[i].type = | |
2553 | strdup_or_goto(pev->args[i].type, | |
2554 | nomem_out); | |
48481938 | 2555 | } |
4235b045 MH |
2556 | } |
2557 | ||
eb948e50 | 2558 | out: |
9b118aca | 2559 | put_target_map(map, pev->uprobes); |
eb948e50 | 2560 | return ret; |
225466f1 | 2561 | |
eb948e50 MH |
2562 | nomem_out: |
2563 | ret = -ENOMEM; | |
2564 | err_out: | |
2565 | clear_probe_trace_events(*tevs, num_matched_functions); | |
2566 | zfree(tevs); | |
2567 | goto out; | |
2568 | } | |
1c1bc922 | 2569 | |
eb948e50 MH |
2570 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
2571 | struct probe_trace_event **tevs, | |
2572 | int max_tevs, const char *target) | |
2573 | { | |
2574 | int ret; | |
2575 | ||
2576 | if (pev->uprobes && !pev->group) { | |
2577 | /* Replace group name if not given */ | |
2578 | ret = convert_exec_to_group(target, &pev->group); | |
2579 | if (ret != 0) { | |
2580 | pr_warning("Failed to make a group name.\n"); | |
2581 | return ret; | |
2582 | } | |
02b95dad | 2583 | } |
e334016f | 2584 | |
eb948e50 MH |
2585 | /* Convert perf_probe_event with debuginfo */ |
2586 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, target); | |
2587 | if (ret != 0) | |
2588 | return ret; /* Found in debuginfo or got an error */ | |
2589 | ||
2590 | return find_probe_trace_events_from_map(pev, tevs, max_tevs, target); | |
4235b045 MH |
2591 | } |
2592 | ||
2593 | struct __event_package { | |
2594 | struct perf_probe_event *pev; | |
0e60836b | 2595 | struct probe_trace_event *tevs; |
4235b045 MH |
2596 | int ntevs; |
2597 | }; | |
2598 | ||
146a1439 | 2599 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
7afb3fab | 2600 | int max_tevs, bool force_add) |
4235b045 | 2601 | { |
146a1439 | 2602 | int i, j, ret; |
4235b045 MH |
2603 | struct __event_package *pkgs; |
2604 | ||
225466f1 | 2605 | ret = 0; |
e334016f | 2606 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
225466f1 | 2607 | |
e334016f MH |
2608 | if (pkgs == NULL) |
2609 | return -ENOMEM; | |
4235b045 | 2610 | |
ee45b6c2 | 2611 | ret = init_symbol_maps(pevs->uprobes); |
449e5b24 MH |
2612 | if (ret < 0) { |
2613 | free(pkgs); | |
146a1439 | 2614 | return ret; |
449e5b24 | 2615 | } |
4235b045 MH |
2616 | |
2617 | /* Loop 1: convert all events */ | |
2618 | for (i = 0; i < npevs; i++) { | |
2619 | pkgs[i].pev = &pevs[i]; | |
2620 | /* Convert with or without debuginfo */ | |
0e60836b | 2621 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
2622 | &pkgs[i].tevs, |
2623 | max_tevs, | |
7afb3fab | 2624 | pkgs[i].pev->target); |
146a1439 MH |
2625 | if (ret < 0) |
2626 | goto end; | |
2627 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
2628 | } |
2629 | ||
4235b045 | 2630 | /* Loop 2: add all events */ |
8635bf6e | 2631 | for (i = 0; i < npevs; i++) { |
0e60836b | 2632 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 | 2633 | pkgs[i].ntevs, force_add); |
fbee632d ACM |
2634 | if (ret < 0) |
2635 | break; | |
2636 | } | |
146a1439 | 2637 | end: |
449e5b24 MH |
2638 | /* Loop 3: cleanup and free trace events */ |
2639 | for (i = 0; i < npevs; i++) { | |
146a1439 | 2640 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 2641 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
74cf249d | 2642 | zfree(&pkgs[i].tevs); |
449e5b24 MH |
2643 | } |
2644 | free(pkgs); | |
ee45b6c2 | 2645 | exit_symbol_maps(); |
146a1439 MH |
2646 | |
2647 | return ret; | |
e0faa8d3 MH |
2648 | } |
2649 | ||
0e60836b | 2650 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
2651 | { |
2652 | char *p; | |
2653 | char buf[128]; | |
4235b045 | 2654 | int ret; |
bbbb521b | 2655 | |
0e60836b | 2656 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
2657 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
2658 | if (ret < 0) | |
2659 | goto error; | |
2660 | ||
bbbb521b | 2661 | p = strchr(buf + 2, ':'); |
146a1439 MH |
2662 | if (!p) { |
2663 | pr_debug("Internal error: %s should have ':' but not.\n", | |
2664 | ent->s); | |
2665 | ret = -ENOTSUP; | |
2666 | goto error; | |
2667 | } | |
bbbb521b MH |
2668 | *p = '/'; |
2669 | ||
4235b045 MH |
2670 | pr_debug("Writing event: %s\n", buf); |
2671 | ret = write(fd, buf, strlen(buf)); | |
44a56040 MH |
2672 | if (ret < 0) { |
2673 | ret = -errno; | |
146a1439 | 2674 | goto error; |
44a56040 | 2675 | } |
146a1439 | 2676 | |
5e17b28f | 2677 | pr_info("Removed event: %s\n", ent->s); |
146a1439 MH |
2678 | return 0; |
2679 | error: | |
5f03cba4 MH |
2680 | pr_warning("Failed to delete event: %s\n", |
2681 | strerror_r(-ret, buf, sizeof(buf))); | |
146a1439 | 2682 | return ret; |
bbbb521b MH |
2683 | } |
2684 | ||
225466f1 SD |
2685 | static int del_trace_probe_event(int fd, const char *buf, |
2686 | struct strlist *namelist) | |
fa28244d | 2687 | { |
bbbb521b | 2688 | struct str_node *ent, *n; |
225466f1 | 2689 | int ret = -1; |
fa28244d | 2690 | |
bbbb521b MH |
2691 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
2692 | strlist__for_each_safe(ent, n, namelist) | |
2693 | if (strglobmatch(ent->s, buf)) { | |
0e60836b | 2694 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
2695 | if (ret < 0) |
2696 | break; | |
bbbb521b MH |
2697 | strlist__remove(namelist, ent); |
2698 | } | |
2699 | } else { | |
2700 | ent = strlist__find(namelist, buf); | |
2701 | if (ent) { | |
0e60836b | 2702 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
2703 | if (ret >= 0) |
2704 | strlist__remove(namelist, ent); | |
bbbb521b MH |
2705 | } |
2706 | } | |
146a1439 MH |
2707 | |
2708 | return ret; | |
fa28244d MH |
2709 | } |
2710 | ||
146a1439 | 2711 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 2712 | { |
225466f1 SD |
2713 | int ret = -1, ufd = -1, kfd = -1; |
2714 | char buf[128]; | |
fa28244d MH |
2715 | const char *group, *event; |
2716 | char *p, *str; | |
2717 | struct str_node *ent; | |
225466f1 | 2718 | struct strlist *namelist = NULL, *unamelist = NULL; |
146a1439 | 2719 | |
fa28244d | 2720 | /* Get current event names */ |
225466f1 | 2721 | kfd = open_kprobe_events(true); |
467ec085 MH |
2722 | if (kfd >= 0) |
2723 | namelist = get_probe_trace_event_names(kfd, true); | |
225466f1 | 2724 | |
225466f1 | 2725 | ufd = open_uprobe_events(true); |
467ec085 | 2726 | if (ufd >= 0) |
225466f1 SD |
2727 | unamelist = get_probe_trace_event_names(ufd, true); |
2728 | ||
467ec085 MH |
2729 | if (kfd < 0 && ufd < 0) { |
2730 | print_both_open_warning(kfd, ufd); | |
2731 | goto error; | |
2732 | } | |
2733 | ||
225466f1 SD |
2734 | if (namelist == NULL && unamelist == NULL) |
2735 | goto error; | |
fa28244d | 2736 | |
adf365f4 | 2737 | strlist__for_each(ent, dellist) { |
02b95dad MH |
2738 | str = strdup(ent->s); |
2739 | if (str == NULL) { | |
2740 | ret = -ENOMEM; | |
225466f1 | 2741 | goto error; |
02b95dad | 2742 | } |
bbbb521b | 2743 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
2744 | p = strchr(str, ':'); |
2745 | if (p) { | |
2746 | group = str; | |
2747 | *p = '\0'; | |
2748 | event = p + 1; | |
2749 | } else { | |
bbbb521b | 2750 | group = "*"; |
fa28244d MH |
2751 | event = str; |
2752 | } | |
225466f1 SD |
2753 | |
2754 | ret = e_snprintf(buf, 128, "%s:%s", group, event); | |
2755 | if (ret < 0) { | |
2756 | pr_err("Failed to copy event."); | |
2757 | free(str); | |
2758 | goto error; | |
2759 | } | |
2760 | ||
bbbb521b | 2761 | pr_debug("Group: %s, Event: %s\n", group, event); |
225466f1 SD |
2762 | |
2763 | if (namelist) | |
2764 | ret = del_trace_probe_event(kfd, buf, namelist); | |
2765 | ||
2766 | if (unamelist && ret != 0) | |
2767 | ret = del_trace_probe_event(ufd, buf, unamelist); | |
2768 | ||
2769 | if (ret != 0) | |
2770 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
2771 | ||
fa28244d MH |
2772 | free(str); |
2773 | } | |
225466f1 SD |
2774 | |
2775 | error: | |
2776 | if (kfd >= 0) { | |
a23c4dc4 | 2777 | strlist__delete(namelist); |
225466f1 SD |
2778 | close(kfd); |
2779 | } | |
2780 | ||
2781 | if (ufd >= 0) { | |
a23c4dc4 | 2782 | strlist__delete(unamelist); |
225466f1 SD |
2783 | close(ufd); |
2784 | } | |
146a1439 MH |
2785 | |
2786 | return ret; | |
fa28244d | 2787 | } |
225466f1 | 2788 | |
3c42258c MH |
2789 | /* TODO: don't use a global variable for filter ... */ |
2790 | static struct strfilter *available_func_filter; | |
fa28244d | 2791 | |
e80711ca | 2792 | /* |
3c42258c MH |
2793 | * If a symbol corresponds to a function with global binding and |
2794 | * matches filter return 0. For all others return 1. | |
e80711ca | 2795 | */ |
1d037ca1 | 2796 | static int filter_available_functions(struct map *map __maybe_unused, |
3c42258c | 2797 | struct symbol *sym) |
e80711ca | 2798 | { |
e578da3b | 2799 | if (strfilter__compare(available_func_filter, sym->name)) |
3c42258c MH |
2800 | return 0; |
2801 | return 1; | |
e80711ca MH |
2802 | } |
2803 | ||
2df58634 MH |
2804 | int show_available_funcs(const char *target, struct strfilter *_filter, |
2805 | bool user) | |
e80711ca MH |
2806 | { |
2807 | struct map *map; | |
2808 | int ret; | |
2809 | ||
2df58634 | 2810 | ret = init_symbol_maps(user); |
e80711ca MH |
2811 | if (ret < 0) |
2812 | return ret; | |
2813 | ||
2df58634 MH |
2814 | /* Get a symbol map */ |
2815 | if (user) | |
2816 | map = dso__new_map(target); | |
2817 | else | |
2818 | map = kernel_get_module_map(target); | |
e80711ca | 2819 | if (!map) { |
2df58634 | 2820 | pr_err("Failed to get a map for %s\n", (target) ? : "kernel"); |
e80711ca MH |
2821 | return -EINVAL; |
2822 | } | |
225466f1 | 2823 | |
2df58634 | 2824 | /* Load symbols with given filter */ |
3c42258c | 2825 | available_func_filter = _filter; |
2df58634 MH |
2826 | if (map__load(map, filter_available_functions)) { |
2827 | pr_err("Failed to load symbols in %s\n", (target) ? : "kernel"); | |
2828 | goto end; | |
2829 | } | |
2830 | if (!dso__sorted_by_name(map->dso, map->type)) | |
2831 | dso__sort_by_name(map->dso, map->type); | |
225466f1 | 2832 | |
2df58634 MH |
2833 | /* Show all (filtered) symbols */ |
2834 | setup_pager(); | |
2835 | dso__fprintf_symbols_by_name(map->dso, map->type, stdout); | |
2836 | end: | |
2837 | if (user) { | |
2838 | dso__delete(map->dso); | |
2839 | map__delete(map); | |
2840 | } | |
2841 | exit_symbol_maps(); | |
225466f1 | 2842 | |
2df58634 | 2843 | return ret; |
225466f1 SD |
2844 | } |
2845 |