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> |
1d037ca1 | 44 | #include "trace-event.h" /* For __maybe_unused */ |
50656eec | 45 | #include "probe-event.h" |
4235b045 | 46 | #include "probe-finder.h" |
225466f1 | 47 | #include "session.h" |
50656eec MH |
48 | |
49 | #define MAX_CMDLEN 256 | |
50656eec MH |
50 | #define PERFPROBE_GROUP "probe" |
51 | ||
f4d7da49 MH |
52 | bool probe_event_dry_run; /* Dry run flag */ |
53 | ||
146a1439 | 54 | #define semantic_error(msg ...) pr_err("Semantic error :" msg) |
50656eec | 55 | |
4de189fe | 56 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
57 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
58 | __attribute__((format(printf, 3, 4))); | |
59 | ||
4de189fe MH |
60 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
61 | { | |
62 | int ret; | |
63 | va_list ap; | |
64 | va_start(ap, format); | |
65 | ret = vsnprintf(str, size, format, ap); | |
66 | va_end(ap); | |
67 | if (ret >= (int)size) | |
68 | ret = -E2BIG; | |
69 | return ret; | |
70 | } | |
71 | ||
4b4da7f7 | 72 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp); |
225466f1 SD |
73 | static int convert_name_to_addr(struct perf_probe_event *pev, |
74 | const char *exec); | |
981d05ad | 75 | static void clear_probe_trace_event(struct probe_trace_event *tev); |
ee45b6c2 | 76 | static struct machine *host_machine; |
e0faa8d3 | 77 | |
469b9b88 | 78 | /* Initialize symbol maps and path of vmlinux/modules */ |
ee45b6c2 | 79 | static int init_symbol_maps(bool user_only) |
e0faa8d3 | 80 | { |
146a1439 MH |
81 | int ret; |
82 | ||
e0faa8d3 | 83 | symbol_conf.sort_by_name = true; |
146a1439 MH |
84 | ret = symbol__init(); |
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 | ||
e80711ca MH |
124 | static struct map *kernel_get_module_map(const char *module) |
125 | { | |
126 | struct rb_node *nd; | |
ee45b6c2 | 127 | struct map_groups *grp = &host_machine->kmaps; |
e80711ca | 128 | |
14a8fd7c MH |
129 | /* A file path -- this is an offline module */ |
130 | if (module && strchr(module, '/')) | |
ee45b6c2 | 131 | return machine__new_module(host_machine, 0, module); |
14a8fd7c | 132 | |
e80711ca MH |
133 | if (!module) |
134 | module = "kernel"; | |
135 | ||
136 | for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) { | |
137 | struct map *pos = rb_entry(nd, struct map, rb_node); | |
138 | if (strncmp(pos->dso->short_name + 1, module, | |
139 | pos->dso->short_name_len - 2) == 0) { | |
140 | return pos; | |
141 | } | |
142 | } | |
143 | return NULL; | |
144 | } | |
145 | ||
146 | static struct dso *kernel_get_module_dso(const char *module) | |
469b9b88 MH |
147 | { |
148 | struct dso *dso; | |
fd930ff9 FBH |
149 | struct map *map; |
150 | const char *vmlinux_name; | |
469b9b88 MH |
151 | |
152 | if (module) { | |
ee45b6c2 | 153 | list_for_each_entry(dso, &host_machine->kernel_dsos, node) { |
469b9b88 MH |
154 | if (strncmp(dso->short_name + 1, module, |
155 | dso->short_name_len - 2) == 0) | |
156 | goto found; | |
157 | } | |
158 | pr_debug("Failed to find module %s.\n", module); | |
159 | return NULL; | |
fd930ff9 FBH |
160 | } |
161 | ||
ee45b6c2 | 162 | map = host_machine->vmlinux_maps[MAP__FUNCTION]; |
fd930ff9 FBH |
163 | dso = map->dso; |
164 | ||
165 | vmlinux_name = symbol_conf.vmlinux_name; | |
166 | if (vmlinux_name) { | |
5230fb7d | 167 | if (dso__load_vmlinux(dso, map, vmlinux_name, false, NULL) <= 0) |
fd930ff9 | 168 | return NULL; |
469b9b88 | 169 | } else { |
c3a34e06 | 170 | if (dso__load_vmlinux_path(dso, map, NULL) <= 0) { |
469b9b88 MH |
171 | pr_debug("Failed to load kernel map.\n"); |
172 | return NULL; | |
173 | } | |
174 | } | |
175 | found: | |
e80711ca MH |
176 | return dso; |
177 | } | |
178 | ||
179 | const char *kernel_get_module_path(const char *module) | |
180 | { | |
181 | struct dso *dso = kernel_get_module_dso(module); | |
182 | return (dso) ? dso->long_name : NULL; | |
469b9b88 MH |
183 | } |
184 | ||
fb7345bb MH |
185 | static int convert_exec_to_group(const char *exec, char **result) |
186 | { | |
187 | char *ptr1, *ptr2, *exec_copy; | |
188 | char buf[64]; | |
189 | int ret; | |
190 | ||
191 | exec_copy = strdup(exec); | |
192 | if (!exec_copy) | |
193 | return -ENOMEM; | |
194 | ||
195 | ptr1 = basename(exec_copy); | |
196 | if (!ptr1) { | |
197 | ret = -EINVAL; | |
198 | goto out; | |
199 | } | |
200 | ||
201 | ptr2 = strpbrk(ptr1, "-._"); | |
202 | if (ptr2) | |
203 | *ptr2 = '\0'; | |
204 | ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1); | |
205 | if (ret < 0) | |
206 | goto out; | |
207 | ||
208 | *result = strdup(buf); | |
209 | ret = *result ? 0 : -ENOMEM; | |
210 | ||
211 | out: | |
212 | free(exec_copy); | |
213 | return ret; | |
214 | } | |
215 | ||
225466f1 SD |
216 | static int convert_to_perf_probe_point(struct probe_trace_point *tp, |
217 | struct perf_probe_point *pp) | |
218 | { | |
219 | pp->function = strdup(tp->symbol); | |
220 | ||
221 | if (pp->function == NULL) | |
222 | return -ENOMEM; | |
223 | ||
224 | pp->offset = tp->offset; | |
225 | pp->retprobe = tp->retprobe; | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
89fe808a | 230 | #ifdef HAVE_DWARF_SUPPORT |
ff741783 MH |
231 | /* Open new debuginfo of given module */ |
232 | static struct debuginfo *open_debuginfo(const char *module) | |
e0faa8d3 | 233 | { |
14a8fd7c | 234 | const char *path; |
ff741783 | 235 | |
14a8fd7c MH |
236 | /* A file path -- this is an offline module */ |
237 | if (module && strchr(module, '/')) | |
238 | path = module; | |
239 | else { | |
240 | path = kernel_get_module_path(module); | |
241 | ||
242 | if (!path) { | |
243 | pr_err("Failed to find path of %s module.\n", | |
244 | module ?: "kernel"); | |
245 | return NULL; | |
246 | } | |
e0faa8d3 | 247 | } |
ff741783 | 248 | return debuginfo__new(path); |
e0faa8d3 | 249 | } |
4b4da7f7 | 250 | |
0e60836b SD |
251 | /* |
252 | * Convert trace point to probe point with debuginfo | |
253 | * Currently only handles kprobes. | |
254 | */ | |
255 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, | |
469b9b88 | 256 | struct perf_probe_point *pp) |
4b4da7f7 MH |
257 | { |
258 | struct symbol *sym; | |
469b9b88 MH |
259 | struct map *map; |
260 | u64 addr; | |
261 | int ret = -ENOENT; | |
ff741783 | 262 | struct debuginfo *dinfo; |
4b4da7f7 | 263 | |
469b9b88 | 264 | sym = __find_kernel_function_by_name(tp->symbol, &map); |
4b4da7f7 | 265 | if (sym) { |
469b9b88 | 266 | addr = map->unmap_ip(map, sym->start + tp->offset); |
9486aa38 | 267 | pr_debug("try to find %s+%ld@%" PRIx64 "\n", tp->symbol, |
469b9b88 | 268 | tp->offset, addr); |
ff741783 MH |
269 | |
270 | dinfo = debuginfo__new_online_kernel(addr); | |
271 | if (dinfo) { | |
272 | ret = debuginfo__find_probe_point(dinfo, | |
273 | (unsigned long)addr, pp); | |
274 | debuginfo__delete(dinfo); | |
275 | } else { | |
276 | pr_debug("Failed to open debuginfo at 0x%" PRIx64 "\n", | |
277 | addr); | |
278 | ret = -ENOENT; | |
279 | } | |
4b4da7f7 MH |
280 | } |
281 | if (ret <= 0) { | |
146a1439 MH |
282 | pr_debug("Failed to find corresponding probes from " |
283 | "debuginfo. Use kprobe event information.\n"); | |
225466f1 | 284 | return convert_to_perf_probe_point(tp, pp); |
4b4da7f7 MH |
285 | } |
286 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
287 | |
288 | return 0; | |
4b4da7f7 MH |
289 | } |
290 | ||
99ca4233 MH |
291 | static int get_text_start_address(const char *exec, unsigned long *address) |
292 | { | |
293 | Elf *elf; | |
294 | GElf_Ehdr ehdr; | |
295 | GElf_Shdr shdr; | |
296 | int fd, ret = -ENOENT; | |
297 | ||
298 | fd = open(exec, O_RDONLY); | |
299 | if (fd < 0) | |
300 | return -errno; | |
301 | ||
302 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
303 | if (elf == NULL) | |
304 | return -EINVAL; | |
305 | ||
306 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
307 | goto out; | |
308 | ||
309 | if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL)) | |
310 | goto out; | |
311 | ||
312 | *address = shdr.sh_addr - shdr.sh_offset; | |
313 | ret = 0; | |
314 | out: | |
315 | elf_end(elf); | |
316 | return ret; | |
317 | } | |
318 | ||
fb7345bb MH |
319 | static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs, |
320 | int ntevs, const char *exec) | |
321 | { | |
322 | int i, ret = 0; | |
323 | unsigned long offset, stext = 0; | |
324 | char buf[32]; | |
325 | ||
326 | if (!exec) | |
327 | return 0; | |
328 | ||
329 | ret = get_text_start_address(exec, &stext); | |
330 | if (ret < 0) | |
331 | return ret; | |
332 | ||
333 | for (i = 0; i < ntevs && ret >= 0; i++) { | |
981a2379 | 334 | /* point.address is the addres of point.symbol + point.offset */ |
fb7345bb | 335 | offset = tevs[i].point.address - stext; |
fb7345bb | 336 | tevs[i].point.offset = 0; |
74cf249d | 337 | zfree(&tevs[i].point.symbol); |
fb7345bb MH |
338 | ret = e_snprintf(buf, 32, "0x%lx", offset); |
339 | if (ret < 0) | |
340 | break; | |
341 | tevs[i].point.module = strdup(exec); | |
342 | tevs[i].point.symbol = strdup(buf); | |
343 | if (!tevs[i].point.symbol || !tevs[i].point.module) { | |
344 | ret = -ENOMEM; | |
345 | break; | |
346 | } | |
347 | tevs[i].uprobes = true; | |
348 | } | |
349 | ||
350 | return ret; | |
351 | } | |
352 | ||
190b57fc MH |
353 | static int add_module_to_probe_trace_events(struct probe_trace_event *tevs, |
354 | int ntevs, const char *module) | |
355 | { | |
14a8fd7c MH |
356 | int i, ret = 0; |
357 | char *tmp; | |
358 | ||
359 | if (!module) | |
360 | return 0; | |
361 | ||
362 | tmp = strrchr(module, '/'); | |
363 | if (tmp) { | |
364 | /* This is a module path -- get the module name */ | |
365 | module = strdup(tmp + 1); | |
366 | if (!module) | |
367 | return -ENOMEM; | |
368 | tmp = strchr(module, '.'); | |
369 | if (tmp) | |
370 | *tmp = '\0'; | |
371 | tmp = (char *)module; /* For free() */ | |
372 | } | |
373 | ||
190b57fc MH |
374 | for (i = 0; i < ntevs; i++) { |
375 | tevs[i].point.module = strdup(module); | |
14a8fd7c MH |
376 | if (!tevs[i].point.module) { |
377 | ret = -ENOMEM; | |
378 | break; | |
379 | } | |
190b57fc | 380 | } |
14a8fd7c | 381 | |
f5385650 | 382 | free(tmp); |
14a8fd7c | 383 | return ret; |
190b57fc MH |
384 | } |
385 | ||
981d05ad MH |
386 | static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs) |
387 | { | |
388 | int i; | |
389 | ||
390 | for (i = 0; i < ntevs; i++) | |
391 | clear_probe_trace_event(tevs + i); | |
392 | } | |
393 | ||
4b4da7f7 | 394 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 395 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
190b57fc | 396 | struct probe_trace_event **tevs, |
4eced234 | 397 | int max_tevs, const char *target) |
4b4da7f7 MH |
398 | { |
399 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
225466f1 | 400 | struct debuginfo *dinfo; |
190b57fc | 401 | int ntevs, ret = 0; |
4b4da7f7 | 402 | |
225466f1 SD |
403 | dinfo = open_debuginfo(target); |
404 | ||
ff741783 | 405 | if (!dinfo) { |
146a1439 MH |
406 | if (need_dwarf) { |
407 | pr_warning("Failed to open debuginfo file.\n"); | |
ff741783 | 408 | return -ENOENT; |
146a1439 | 409 | } |
ff741783 | 410 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
411 | return 0; |
412 | } | |
413 | ||
ff741783 MH |
414 | /* Searching trace events corresponding to a probe event */ |
415 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs); | |
416 | ||
417 | debuginfo__delete(dinfo); | |
4b4da7f7 | 418 | |
146a1439 | 419 | if (ntevs > 0) { /* Succeeded to find trace events */ |
0e60836b | 420 | pr_debug("find %d probe_trace_events.\n", ntevs); |
fb7345bb MH |
421 | if (target) { |
422 | if (pev->uprobes) | |
423 | ret = add_exec_to_probe_trace_events(*tevs, | |
424 | ntevs, target); | |
425 | else | |
426 | ret = add_module_to_probe_trace_events(*tevs, | |
427 | ntevs, target); | |
428 | } | |
981d05ad MH |
429 | if (ret < 0) { |
430 | clear_probe_trace_events(*tevs, ntevs); | |
431 | zfree(tevs); | |
432 | } | |
190b57fc | 433 | return ret < 0 ? ret : ntevs; |
146a1439 | 434 | } |
4b4da7f7 | 435 | |
146a1439 MH |
436 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
437 | pr_warning("Probe point '%s' not found.\n", | |
438 | synthesize_perf_probe_point(&pev->point)); | |
439 | return -ENOENT; | |
440 | } | |
441 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
442 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
443 | if (ntevs == -EBADF) { | |
444 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
445 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
446 | if (!need_dwarf) { | |
0e43e5d2 | 447 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
448 | return 0; |
449 | } | |
4b4da7f7 | 450 | } |
15eca306 | 451 | return ntevs; |
4b4da7f7 MH |
452 | } |
453 | ||
7cf0b79e MH |
454 | /* |
455 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
456 | * and chop off leading directories that do not exist. Result is passed back as | |
457 | * a newly allocated path on success. | |
458 | * Return 0 if file was found and readable, -errno otherwise. | |
459 | */ | |
6a330a3c MH |
460 | static int get_real_path(const char *raw_path, const char *comp_dir, |
461 | char **new_path) | |
7cf0b79e | 462 | { |
6a330a3c MH |
463 | const char *prefix = symbol_conf.source_prefix; |
464 | ||
465 | if (!prefix) { | |
466 | if (raw_path[0] != '/' && comp_dir) | |
467 | /* If not an absolute path, try to use comp_dir */ | |
468 | prefix = comp_dir; | |
469 | else { | |
470 | if (access(raw_path, R_OK) == 0) { | |
471 | *new_path = strdup(raw_path); | |
472 | return 0; | |
473 | } else | |
474 | return -errno; | |
475 | } | |
7cf0b79e MH |
476 | } |
477 | ||
6a330a3c | 478 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
7cf0b79e MH |
479 | if (!*new_path) |
480 | return -ENOMEM; | |
481 | ||
482 | for (;;) { | |
6a330a3c | 483 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
7cf0b79e MH |
484 | |
485 | if (access(*new_path, R_OK) == 0) | |
486 | return 0; | |
487 | ||
6a330a3c MH |
488 | if (!symbol_conf.source_prefix) |
489 | /* In case of searching comp_dir, don't retry */ | |
490 | return -errno; | |
491 | ||
7cf0b79e MH |
492 | switch (errno) { |
493 | case ENAMETOOLONG: | |
494 | case ENOENT: | |
495 | case EROFS: | |
496 | case EFAULT: | |
497 | raw_path = strchr(++raw_path, '/'); | |
498 | if (!raw_path) { | |
04662523 | 499 | zfree(new_path); |
7cf0b79e MH |
500 | return -ENOENT; |
501 | } | |
502 | continue; | |
503 | ||
504 | default: | |
04662523 | 505 | zfree(new_path); |
7cf0b79e MH |
506 | return -errno; |
507 | } | |
508 | } | |
509 | } | |
510 | ||
4b4da7f7 MH |
511 | #define LINEBUF_SIZE 256 |
512 | #define NR_ADDITIONAL_LINES 2 | |
513 | ||
fde52dbd | 514 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
515 | { |
516 | char buf[LINEBUF_SIZE]; | |
befe3414 FBH |
517 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
518 | const char *prefix = NULL; | |
4b4da7f7 | 519 | |
befe3414 | 520 | do { |
4b4da7f7 MH |
521 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
522 | goto error; | |
befe3414 FBH |
523 | if (skip) |
524 | continue; | |
525 | if (!prefix) { | |
526 | prefix = show_num ? "%7d " : " "; | |
527 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 528 | } |
befe3414 FBH |
529 | color_fprintf(stdout, color, "%s", buf); |
530 | ||
531 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 532 | |
fde52dbd | 533 | return 1; |
4b4da7f7 | 534 | error: |
fde52dbd | 535 | if (ferror(fp)) { |
32b2b6ec | 536 | pr_warning("File read error: %s\n", strerror(errno)); |
fde52dbd FBH |
537 | return -1; |
538 | } | |
539 | return 0; | |
540 | } | |
146a1439 | 541 | |
fde52dbd FBH |
542 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
543 | { | |
544 | int rv = __show_one_line(fp, l, skip, show_num); | |
545 | if (rv == 0) { | |
546 | pr_warning("Source file is shorter than expected.\n"); | |
547 | rv = -1; | |
548 | } | |
549 | return rv; | |
4b4da7f7 MH |
550 | } |
551 | ||
fde52dbd FBH |
552 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
553 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
554 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
555 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
556 | ||
4b4da7f7 MH |
557 | /* |
558 | * Show line-range always requires debuginfo to find source file and | |
559 | * line number. | |
560 | */ | |
ee45b6c2 | 561 | static int __show_line_range(struct line_range *lr, const char *module) |
4b4da7f7 | 562 | { |
d3b63d7a | 563 | int l = 1; |
5a62257a | 564 | struct int_node *ln; |
ff741783 | 565 | struct debuginfo *dinfo; |
4b4da7f7 | 566 | FILE *fp; |
ff741783 | 567 | int ret; |
7cf0b79e | 568 | char *tmp; |
4b4da7f7 MH |
569 | |
570 | /* Search a line range */ | |
ff741783 MH |
571 | dinfo = open_debuginfo(module); |
572 | if (!dinfo) { | |
146a1439 | 573 | pr_warning("Failed to open debuginfo file.\n"); |
ff741783 | 574 | return -ENOENT; |
146a1439 MH |
575 | } |
576 | ||
ff741783 MH |
577 | ret = debuginfo__find_line_range(dinfo, lr); |
578 | debuginfo__delete(dinfo); | |
146a1439 MH |
579 | if (ret == 0) { |
580 | pr_warning("Specified source line is not found.\n"); | |
581 | return -ENOENT; | |
582 | } else if (ret < 0) { | |
583 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
584 | return ret; | |
585 | } | |
4b4da7f7 | 586 | |
7cf0b79e MH |
587 | /* Convert source file path */ |
588 | tmp = lr->path; | |
6a330a3c | 589 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
7cf0b79e MH |
590 | free(tmp); /* Free old path */ |
591 | if (ret < 0) { | |
592 | pr_warning("Failed to find source file. (%d)\n", ret); | |
593 | return ret; | |
594 | } | |
595 | ||
4b4da7f7 MH |
596 | setup_pager(); |
597 | ||
598 | if (lr->function) | |
8737ebde | 599 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
600 | lr->start - lr->offset); |
601 | else | |
62c15fc4 | 602 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
603 | |
604 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
605 | if (fp == NULL) { |
606 | pr_warning("Failed to open %s: %s\n", lr->path, | |
607 | strerror(errno)); | |
608 | return -errno; | |
609 | } | |
4b4da7f7 | 610 | /* Skip to starting line number */ |
44b81e92 | 611 | while (l < lr->start) { |
fde52dbd | 612 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
613 | if (ret < 0) |
614 | goto end; | |
615 | } | |
4b4da7f7 | 616 | |
5a62257a MH |
617 | intlist__for_each(ln, lr->line_list) { |
618 | for (; ln->i > l; l++) { | |
fde52dbd | 619 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
620 | if (ret < 0) |
621 | goto end; | |
622 | } | |
fde52dbd | 623 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
624 | if (ret < 0) |
625 | goto end; | |
4b4da7f7 MH |
626 | } |
627 | ||
628 | if (lr->end == INT_MAX) | |
629 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
630 | while (l <= lr->end) { |
631 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
632 | if (ret <= 0) | |
44b81e92 FBH |
633 | break; |
634 | } | |
146a1439 | 635 | end: |
4b4da7f7 | 636 | fclose(fp); |
146a1439 | 637 | return ret; |
4b4da7f7 MH |
638 | } |
639 | ||
ee45b6c2 MH |
640 | int show_line_range(struct line_range *lr, const char *module) |
641 | { | |
642 | int ret; | |
643 | ||
644 | ret = init_symbol_maps(false); | |
645 | if (ret < 0) | |
646 | return ret; | |
647 | ret = __show_line_range(lr, module); | |
648 | exit_symbol_maps(); | |
649 | ||
650 | return ret; | |
651 | } | |
652 | ||
ff741783 MH |
653 | static int show_available_vars_at(struct debuginfo *dinfo, |
654 | struct perf_probe_event *pev, | |
bd09d7b5 MH |
655 | int max_vls, struct strfilter *_filter, |
656 | bool externs) | |
cf6eb489 MH |
657 | { |
658 | char *buf; | |
bd09d7b5 | 659 | int ret, i, nvars; |
cf6eb489 MH |
660 | struct str_node *node; |
661 | struct variable_list *vls = NULL, *vl; | |
bd09d7b5 | 662 | const char *var; |
cf6eb489 MH |
663 | |
664 | buf = synthesize_perf_probe_point(&pev->point); | |
665 | if (!buf) | |
666 | return -EINVAL; | |
667 | pr_debug("Searching variables at %s\n", buf); | |
668 | ||
ff741783 MH |
669 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls, |
670 | max_vls, externs); | |
bd09d7b5 MH |
671 | if (ret <= 0) { |
672 | pr_err("Failed to find variables at %s (%d)\n", buf, ret); | |
673 | goto end; | |
674 | } | |
675 | /* Some variables are found */ | |
676 | fprintf(stdout, "Available variables at %s\n", buf); | |
677 | for (i = 0; i < ret; i++) { | |
678 | vl = &vls[i]; | |
679 | /* | |
680 | * A probe point might be converted to | |
681 | * several trace points. | |
682 | */ | |
683 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
684 | vl->point.offset); | |
74cf249d | 685 | zfree(&vl->point.symbol); |
bd09d7b5 MH |
686 | nvars = 0; |
687 | if (vl->vars) { | |
688 | strlist__for_each(node, vl->vars) { | |
689 | var = strchr(node->s, '\t') + 1; | |
690 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 691 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
692 | nvars++; |
693 | } | |
694 | } | |
695 | strlist__delete(vl->vars); | |
cf6eb489 | 696 | } |
bd09d7b5 MH |
697 | if (nvars == 0) |
698 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
699 | } | |
700 | free(vls); | |
701 | end: | |
cf6eb489 MH |
702 | free(buf); |
703 | return ret; | |
704 | } | |
705 | ||
706 | /* Show available variables on given probe point */ | |
707 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
bd09d7b5 MH |
708 | int max_vls, const char *module, |
709 | struct strfilter *_filter, bool externs) | |
cf6eb489 | 710 | { |
ff741783 MH |
711 | int i, ret = 0; |
712 | struct debuginfo *dinfo; | |
cf6eb489 | 713 | |
ee45b6c2 | 714 | ret = init_symbol_maps(false); |
cf6eb489 MH |
715 | if (ret < 0) |
716 | return ret; | |
717 | ||
ff741783 MH |
718 | dinfo = open_debuginfo(module); |
719 | if (!dinfo) { | |
720 | pr_warning("Failed to open debuginfo file.\n"); | |
ee45b6c2 MH |
721 | ret = -ENOENT; |
722 | goto out; | |
ff741783 MH |
723 | } |
724 | ||
cf6eb489 MH |
725 | setup_pager(); |
726 | ||
ff741783 MH |
727 | for (i = 0; i < npevs && ret >= 0; i++) |
728 | ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter, | |
bd09d7b5 | 729 | externs); |
ff741783 MH |
730 | |
731 | debuginfo__delete(dinfo); | |
ee45b6c2 MH |
732 | out: |
733 | exit_symbol_maps(); | |
cf6eb489 MH |
734 | return ret; |
735 | } | |
736 | ||
89fe808a | 737 | #else /* !HAVE_DWARF_SUPPORT */ |
4b4da7f7 | 738 | |
0e60836b | 739 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, |
469b9b88 | 740 | struct perf_probe_point *pp) |
4b4da7f7 | 741 | { |
225466f1 | 742 | return convert_to_perf_probe_point(tp, pp); |
4b4da7f7 MH |
743 | } |
744 | ||
0e60836b | 745 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
1d037ca1 | 746 | struct probe_trace_event **tevs __maybe_unused, |
1d027ee9 ACM |
747 | int max_tevs __maybe_unused, |
748 | const char *target __maybe_unused) | |
4b4da7f7 | 749 | { |
146a1439 MH |
750 | if (perf_probe_event_need_dwarf(pev)) { |
751 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
752 | return -ENOSYS; | |
753 | } | |
225466f1 | 754 | |
4b4da7f7 MH |
755 | return 0; |
756 | } | |
757 | ||
1d037ca1 IT |
758 | int show_line_range(struct line_range *lr __maybe_unused, |
759 | const char *module __maybe_unused) | |
4b4da7f7 | 760 | { |
146a1439 MH |
761 | pr_warning("Debuginfo-analysis is not supported.\n"); |
762 | return -ENOSYS; | |
4b4da7f7 MH |
763 | } |
764 | ||
1d037ca1 IT |
765 | int show_available_vars(struct perf_probe_event *pevs __maybe_unused, |
766 | int npevs __maybe_unused, int max_vls __maybe_unused, | |
767 | const char *module __maybe_unused, | |
768 | struct strfilter *filter __maybe_unused, | |
769 | bool externs __maybe_unused) | |
cf6eb489 MH |
770 | { |
771 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
772 | return -ENOSYS; | |
773 | } | |
e0faa8d3 MH |
774 | #endif |
775 | ||
e53b00d3 MH |
776 | void line_range__clear(struct line_range *lr) |
777 | { | |
e53b00d3 MH |
778 | free(lr->function); |
779 | free(lr->file); | |
780 | free(lr->path); | |
781 | free(lr->comp_dir); | |
5a62257a | 782 | intlist__delete(lr->line_list); |
e53b00d3 MH |
783 | memset(lr, 0, sizeof(*lr)); |
784 | } | |
785 | ||
5a62257a | 786 | int line_range__init(struct line_range *lr) |
e53b00d3 MH |
787 | { |
788 | memset(lr, 0, sizeof(*lr)); | |
5a62257a MH |
789 | lr->line_list = intlist__new(NULL); |
790 | if (!lr->line_list) | |
791 | return -ENOMEM; | |
792 | else | |
793 | return 0; | |
e53b00d3 MH |
794 | } |
795 | ||
21dd9ae5 FBH |
796 | static int parse_line_num(char **ptr, int *val, const char *what) |
797 | { | |
798 | const char *start = *ptr; | |
799 | ||
800 | errno = 0; | |
801 | *val = strtol(*ptr, ptr, 0); | |
802 | if (errno || *ptr == start) { | |
803 | semantic_error("'%s' is not a valid number.\n", what); | |
804 | return -EINVAL; | |
805 | } | |
806 | return 0; | |
807 | } | |
808 | ||
9d95b580 FBH |
809 | /* |
810 | * Stuff 'lr' according to the line range described by 'arg'. | |
811 | * The line range syntax is described by: | |
812 | * | |
813 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 814 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 815 | */ |
146a1439 | 816 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 817 | { |
e116dfa1 | 818 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
819 | int err; |
820 | ||
821 | if (!name) | |
822 | return -ENOMEM; | |
823 | ||
824 | lr->start = 0; | |
825 | lr->end = INT_MAX; | |
826 | ||
827 | range = strchr(name, ':'); | |
828 | if (range) { | |
829 | *range++ = '\0'; | |
830 | ||
831 | err = parse_line_num(&range, &lr->start, "start line"); | |
832 | if (err) | |
833 | goto err; | |
834 | ||
835 | if (*range == '+' || *range == '-') { | |
836 | const char c = *range++; | |
837 | ||
838 | err = parse_line_num(&range, &lr->end, "end line"); | |
839 | if (err) | |
840 | goto err; | |
841 | ||
842 | if (c == '+') { | |
843 | lr->end += lr->start; | |
844 | /* | |
845 | * Adjust the number of lines here. | |
846 | * If the number of lines == 1, the | |
847 | * the end of line should be equal to | |
848 | * the start of line. | |
849 | */ | |
850 | lr->end--; | |
851 | } | |
852 | } | |
9d95b580 | 853 | |
d3b63d7a | 854 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
855 | |
856 | err = -EINVAL; | |
d3b63d7a | 857 | if (lr->start > lr->end) { |
631c9def | 858 | semantic_error("Start line must be smaller" |
146a1439 | 859 | " than end line.\n"); |
21dd9ae5 | 860 | goto err; |
146a1439 | 861 | } |
21dd9ae5 FBH |
862 | if (*range != '\0') { |
863 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
864 | goto err; | |
146a1439 | 865 | } |
d3b63d7a | 866 | } |
02b95dad | 867 | |
e116dfa1 MH |
868 | file = strchr(name, '@'); |
869 | if (file) { | |
870 | *file = '\0'; | |
871 | lr->file = strdup(++file); | |
872 | if (lr->file == NULL) { | |
873 | err = -ENOMEM; | |
874 | goto err; | |
875 | } | |
876 | lr->function = name; | |
877 | } else if (strchr(name, '.')) | |
21dd9ae5 | 878 | lr->file = name; |
631c9def | 879 | else |
21dd9ae5 | 880 | lr->function = name; |
146a1439 MH |
881 | |
882 | return 0; | |
21dd9ae5 FBH |
883 | err: |
884 | free(name); | |
885 | return err; | |
631c9def MH |
886 | } |
887 | ||
b7702a21 MH |
888 | /* Check the name is good for event/group */ |
889 | static bool check_event_name(const char *name) | |
890 | { | |
891 | if (!isalpha(*name) && *name != '_') | |
892 | return false; | |
893 | while (*++name != '\0') { | |
894 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
895 | return false; | |
896 | } | |
897 | return true; | |
898 | } | |
899 | ||
50656eec | 900 | /* Parse probepoint definition. */ |
146a1439 | 901 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 902 | { |
4235b045 | 903 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
904 | char *ptr, *tmp; |
905 | char c, nc = 0; | |
906 | /* | |
907 | * <Syntax> | |
2a9c8c36 MH |
908 | * perf probe [EVENT=]SRC[:LN|;PTN] |
909 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
910 | * |
911 | * TODO:Group name support | |
50656eec MH |
912 | */ |
913 | ||
2a9c8c36 MH |
914 | ptr = strpbrk(arg, ";=@+%"); |
915 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
916 | *ptr = '\0'; |
917 | tmp = ptr + 1; | |
146a1439 MH |
918 | if (strchr(arg, ':')) { |
919 | semantic_error("Group name is not supported yet.\n"); | |
920 | return -ENOTSUP; | |
921 | } | |
922 | if (!check_event_name(arg)) { | |
b7702a21 | 923 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
924 | "follow C symbol-naming rule.\n", arg); |
925 | return -EINVAL; | |
926 | } | |
02b95dad MH |
927 | pev->event = strdup(arg); |
928 | if (pev->event == NULL) | |
929 | return -ENOMEM; | |
4235b045 | 930 | pev->group = NULL; |
af663d75 MH |
931 | arg = tmp; |
932 | } | |
933 | ||
2a9c8c36 | 934 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
935 | if (ptr) { |
936 | nc = *ptr; | |
937 | *ptr++ = '\0'; | |
938 | } | |
939 | ||
02b95dad MH |
940 | tmp = strdup(arg); |
941 | if (tmp == NULL) | |
942 | return -ENOMEM; | |
943 | ||
50656eec | 944 | /* Check arg is function or file and copy it */ |
02b95dad MH |
945 | if (strchr(tmp, '.')) /* File */ |
946 | pp->file = tmp; | |
50656eec | 947 | else /* Function */ |
02b95dad | 948 | pp->function = tmp; |
50656eec MH |
949 | |
950 | /* Parse other options */ | |
951 | while (ptr) { | |
952 | arg = ptr; | |
953 | c = nc; | |
2a9c8c36 | 954 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
955 | pp->lazy_line = strdup(arg); |
956 | if (pp->lazy_line == NULL) | |
957 | return -ENOMEM; | |
2a9c8c36 MH |
958 | break; |
959 | } | |
960 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
961 | if (ptr) { |
962 | nc = *ptr; | |
963 | *ptr++ = '\0'; | |
964 | } | |
965 | switch (c) { | |
966 | case ':': /* Line number */ | |
967 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 968 | if (*tmp != '\0') { |
2a9c8c36 | 969 | semantic_error("There is non-digit char" |
146a1439 MH |
970 | " in line number.\n"); |
971 | return -EINVAL; | |
972 | } | |
50656eec MH |
973 | break; |
974 | case '+': /* Byte offset from a symbol */ | |
975 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 976 | if (*tmp != '\0') { |
2a9c8c36 | 977 | semantic_error("There is non-digit character" |
146a1439 MH |
978 | " in offset.\n"); |
979 | return -EINVAL; | |
980 | } | |
50656eec MH |
981 | break; |
982 | case '@': /* File name */ | |
146a1439 MH |
983 | if (pp->file) { |
984 | semantic_error("SRC@SRC is not allowed.\n"); | |
985 | return -EINVAL; | |
986 | } | |
02b95dad MH |
987 | pp->file = strdup(arg); |
988 | if (pp->file == NULL) | |
989 | return -ENOMEM; | |
50656eec MH |
990 | break; |
991 | case '%': /* Probe places */ | |
992 | if (strcmp(arg, "return") == 0) { | |
993 | pp->retprobe = 1; | |
146a1439 MH |
994 | } else { /* Others not supported yet */ |
995 | semantic_error("%%%s is not supported.\n", arg); | |
996 | return -ENOTSUP; | |
997 | } | |
50656eec | 998 | break; |
146a1439 MH |
999 | default: /* Buggy case */ |
1000 | pr_err("This program has a bug at %s:%d.\n", | |
1001 | __FILE__, __LINE__); | |
1002 | return -ENOTSUP; | |
50656eec MH |
1003 | break; |
1004 | } | |
1005 | } | |
1006 | ||
1007 | /* Exclusion check */ | |
146a1439 | 1008 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
1009 | semantic_error("Lazy pattern can't be used with" |
1010 | " line number.\n"); | |
146a1439 MH |
1011 | return -EINVAL; |
1012 | } | |
2a9c8c36 | 1013 | |
146a1439 | 1014 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 1015 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
1016 | return -EINVAL; |
1017 | } | |
2a9c8c36 | 1018 | |
146a1439 | 1019 | if (pp->line && pp->offset) { |
0e43e5d2 | 1020 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
1021 | return -EINVAL; |
1022 | } | |
50656eec | 1023 | |
146a1439 | 1024 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 1025 | semantic_error("File always requires line number or " |
0e43e5d2 | 1026 | "lazy pattern.\n"); |
146a1439 MH |
1027 | return -EINVAL; |
1028 | } | |
50656eec | 1029 | |
146a1439 | 1030 | if (pp->offset && !pp->function) { |
0e43e5d2 | 1031 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
1032 | return -EINVAL; |
1033 | } | |
50656eec | 1034 | |
146a1439 | 1035 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 1036 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
1037 | return -EINVAL; |
1038 | } | |
50656eec | 1039 | |
146a1439 | 1040 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 1041 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 1042 | "return probe.\n"); |
146a1439 MH |
1043 | return -EINVAL; |
1044 | } | |
50656eec | 1045 | |
4235b045 | 1046 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
1047 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
1048 | pp->lazy_line); | |
146a1439 | 1049 | return 0; |
50656eec MH |
1050 | } |
1051 | ||
7df2f329 | 1052 | /* Parse perf-probe event argument */ |
146a1439 | 1053 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 1054 | { |
b2a3c12b | 1055 | char *tmp, *goodname; |
7df2f329 MH |
1056 | struct perf_probe_arg_field **fieldp; |
1057 | ||
1058 | pr_debug("parsing arg: %s into ", str); | |
1059 | ||
48481938 MH |
1060 | tmp = strchr(str, '='); |
1061 | if (tmp) { | |
02b95dad MH |
1062 | arg->name = strndup(str, tmp - str); |
1063 | if (arg->name == NULL) | |
1064 | return -ENOMEM; | |
11a1ca35 | 1065 | pr_debug("name:%s ", arg->name); |
48481938 MH |
1066 | str = tmp + 1; |
1067 | } | |
1068 | ||
11a1ca35 MH |
1069 | tmp = strchr(str, ':'); |
1070 | if (tmp) { /* Type setting */ | |
1071 | *tmp = '\0'; | |
02b95dad MH |
1072 | arg->type = strdup(tmp + 1); |
1073 | if (arg->type == NULL) | |
1074 | return -ENOMEM; | |
11a1ca35 MH |
1075 | pr_debug("type:%s ", arg->type); |
1076 | } | |
1077 | ||
b2a3c12b | 1078 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
1079 | if (!is_c_varname(str) || !tmp) { |
1080 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
1081 | arg->var = strdup(str); |
1082 | if (arg->var == NULL) | |
1083 | return -ENOMEM; | |
48481938 | 1084 | pr_debug("%s\n", arg->var); |
146a1439 | 1085 | return 0; |
7df2f329 MH |
1086 | } |
1087 | ||
b2a3c12b | 1088 | /* Structure fields or array element */ |
02b95dad MH |
1089 | arg->var = strndup(str, tmp - str); |
1090 | if (arg->var == NULL) | |
1091 | return -ENOMEM; | |
b2a3c12b | 1092 | goodname = arg->var; |
48481938 | 1093 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
1094 | fieldp = &arg->field; |
1095 | ||
1096 | do { | |
e334016f MH |
1097 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
1098 | if (*fieldp == NULL) | |
1099 | return -ENOMEM; | |
b2a3c12b MH |
1100 | if (*tmp == '[') { /* Array */ |
1101 | str = tmp; | |
1102 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 1103 | (*fieldp)->ref = true; |
b2a3c12b MH |
1104 | if (*tmp != ']' || tmp == str + 1) { |
1105 | semantic_error("Array index must be a" | |
1106 | " number.\n"); | |
1107 | return -EINVAL; | |
1108 | } | |
1109 | tmp++; | |
1110 | if (*tmp == '\0') | |
1111 | tmp = NULL; | |
1112 | } else { /* Structure */ | |
1113 | if (*tmp == '.') { | |
1114 | str = tmp + 1; | |
1115 | (*fieldp)->ref = false; | |
1116 | } else if (tmp[1] == '>') { | |
1117 | str = tmp + 2; | |
1118 | (*fieldp)->ref = true; | |
1119 | } else { | |
1120 | semantic_error("Argument parse error: %s\n", | |
1121 | str); | |
1122 | return -EINVAL; | |
1123 | } | |
1124 | tmp = strpbrk(str, "-.["); | |
146a1439 | 1125 | } |
7df2f329 | 1126 | if (tmp) { |
02b95dad MH |
1127 | (*fieldp)->name = strndup(str, tmp - str); |
1128 | if ((*fieldp)->name == NULL) | |
1129 | return -ENOMEM; | |
b2a3c12b MH |
1130 | if (*str != '[') |
1131 | goodname = (*fieldp)->name; | |
7df2f329 MH |
1132 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
1133 | fieldp = &(*fieldp)->next; | |
1134 | } | |
1135 | } while (tmp); | |
02b95dad MH |
1136 | (*fieldp)->name = strdup(str); |
1137 | if ((*fieldp)->name == NULL) | |
1138 | return -ENOMEM; | |
b2a3c12b MH |
1139 | if (*str != '[') |
1140 | goodname = (*fieldp)->name; | |
7df2f329 | 1141 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 1142 | |
b2a3c12b | 1143 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 1144 | if (!arg->name) { |
b2a3c12b | 1145 | arg->name = strdup(goodname); |
02b95dad MH |
1146 | if (arg->name == NULL) |
1147 | return -ENOMEM; | |
1148 | } | |
146a1439 | 1149 | return 0; |
7df2f329 MH |
1150 | } |
1151 | ||
4235b045 | 1152 | /* Parse perf-probe event command */ |
146a1439 | 1153 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1154 | { |
e1c01d61 | 1155 | char **argv; |
146a1439 | 1156 | int argc, i, ret = 0; |
fac13fd5 | 1157 | |
4235b045 | 1158 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1159 | if (!argv) { |
1160 | pr_debug("Failed to split arguments.\n"); | |
1161 | return -ENOMEM; | |
1162 | } | |
1163 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1164 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1165 | ret = -ERANGE; | |
1166 | goto out; | |
1167 | } | |
50656eec | 1168 | /* Parse probe point */ |
146a1439 MH |
1169 | ret = parse_perf_probe_point(argv[0], pev); |
1170 | if (ret < 0) | |
1171 | goto out; | |
50656eec | 1172 | |
e1c01d61 | 1173 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1174 | pev->nargs = argc - 1; |
e334016f MH |
1175 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1176 | if (pev->args == NULL) { | |
1177 | ret = -ENOMEM; | |
1178 | goto out; | |
1179 | } | |
146a1439 MH |
1180 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1181 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1182 | if (ret >= 0 && | |
1183 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1184 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1185 | " kretprobe.\n"); |
1186 | ret = -EINVAL; | |
1187 | } | |
e1c01d61 | 1188 | } |
146a1439 | 1189 | out: |
e1c01d61 | 1190 | argv_free(argv); |
146a1439 MH |
1191 | |
1192 | return ret; | |
50656eec MH |
1193 | } |
1194 | ||
4235b045 MH |
1195 | /* Return true if this perf_probe_event requires debuginfo */ |
1196 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1197 | { | |
1198 | int i; | |
1199 | ||
1200 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
1201 | return true; | |
1202 | ||
1203 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 1204 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
1205 | return true; |
1206 | ||
1207 | return false; | |
1208 | } | |
1209 | ||
0e60836b SD |
1210 | /* Parse probe_events event into struct probe_point */ |
1211 | static int parse_probe_trace_command(const char *cmd, | |
190b57fc | 1212 | struct probe_trace_event *tev) |
4de189fe | 1213 | { |
0e60836b | 1214 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1215 | char pr; |
1216 | char *p; | |
bcbd0040 | 1217 | char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str; |
4de189fe MH |
1218 | int ret, i, argc; |
1219 | char **argv; | |
1220 | ||
0e60836b | 1221 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1222 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1223 | if (!argv) { |
1224 | pr_debug("Failed to split arguments.\n"); | |
1225 | return -ENOMEM; | |
1226 | } | |
1227 | if (argc < 2) { | |
1228 | semantic_error("Too few probe arguments.\n"); | |
1229 | ret = -ERANGE; | |
1230 | goto out; | |
1231 | } | |
4de189fe MH |
1232 | |
1233 | /* Scan event and group name. */ | |
bcbd0040 IT |
1234 | argv0_str = strdup(argv[0]); |
1235 | if (argv0_str == NULL) { | |
1236 | ret = -ENOMEM; | |
1237 | goto out; | |
1238 | } | |
1239 | fmt1_str = strtok_r(argv0_str, ":", &fmt); | |
1240 | fmt2_str = strtok_r(NULL, "/", &fmt); | |
1241 | fmt3_str = strtok_r(NULL, " \t", &fmt); | |
1242 | if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL | |
1243 | || fmt3_str == NULL) { | |
146a1439 MH |
1244 | semantic_error("Failed to parse event name: %s\n", argv[0]); |
1245 | ret = -EINVAL; | |
1246 | goto out; | |
1247 | } | |
bcbd0040 IT |
1248 | pr = fmt1_str[0]; |
1249 | tev->group = strdup(fmt2_str); | |
1250 | tev->event = strdup(fmt3_str); | |
1251 | if (tev->group == NULL || tev->event == NULL) { | |
1252 | ret = -ENOMEM; | |
1253 | goto out; | |
1254 | } | |
4235b045 | 1255 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1256 | |
4235b045 | 1257 | tp->retprobe = (pr == 'r'); |
4de189fe | 1258 | |
190b57fc MH |
1259 | /* Scan module name(if there), function name and offset */ |
1260 | p = strchr(argv[1], ':'); | |
1261 | if (p) { | |
1262 | tp->module = strndup(argv[1], p - argv[1]); | |
1263 | p++; | |
1264 | } else | |
1265 | p = argv[1]; | |
bcbd0040 IT |
1266 | fmt1_str = strtok_r(p, "+", &fmt); |
1267 | tp->symbol = strdup(fmt1_str); | |
1268 | if (tp->symbol == NULL) { | |
1269 | ret = -ENOMEM; | |
1270 | goto out; | |
1271 | } | |
1272 | fmt2_str = strtok_r(NULL, "", &fmt); | |
1273 | if (fmt2_str == NULL) | |
4235b045 | 1274 | tp->offset = 0; |
bcbd0040 IT |
1275 | else |
1276 | tp->offset = strtoul(fmt2_str, NULL, 10); | |
4de189fe | 1277 | |
4235b045 | 1278 | tev->nargs = argc - 2; |
0e60836b | 1279 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1280 | if (tev->args == NULL) { |
1281 | ret = -ENOMEM; | |
1282 | goto out; | |
1283 | } | |
4235b045 | 1284 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1285 | p = strchr(argv[i + 2], '='); |
1286 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1287 | *p++ = '\0'; |
1288 | else | |
1289 | p = argv[i + 2]; | |
02b95dad | 1290 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1291 | /* TODO: parse regs and offset */ |
02b95dad MH |
1292 | tev->args[i].value = strdup(p); |
1293 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1294 | ret = -ENOMEM; | |
1295 | goto out; | |
1296 | } | |
4de189fe | 1297 | } |
146a1439 MH |
1298 | ret = 0; |
1299 | out: | |
bcbd0040 | 1300 | free(argv0_str); |
4de189fe | 1301 | argv_free(argv); |
146a1439 | 1302 | return ret; |
4de189fe MH |
1303 | } |
1304 | ||
7df2f329 MH |
1305 | /* Compose only probe arg */ |
1306 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
1307 | { | |
1308 | struct perf_probe_arg_field *field = pa->field; | |
1309 | int ret; | |
1310 | char *tmp = buf; | |
1311 | ||
48481938 MH |
1312 | if (pa->name && pa->var) |
1313 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
1314 | else | |
1315 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
1316 | if (ret <= 0) |
1317 | goto error; | |
1318 | tmp += ret; | |
1319 | len -= ret; | |
1320 | ||
1321 | while (field) { | |
b2a3c12b MH |
1322 | if (field->name[0] == '[') |
1323 | ret = e_snprintf(tmp, len, "%s", field->name); | |
1324 | else | |
1325 | ret = e_snprintf(tmp, len, "%s%s", | |
1326 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
1327 | if (ret <= 0) |
1328 | goto error; | |
1329 | tmp += ret; | |
1330 | len -= ret; | |
1331 | field = field->next; | |
1332 | } | |
11a1ca35 MH |
1333 | |
1334 | if (pa->type) { | |
1335 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
1336 | if (ret <= 0) | |
1337 | goto error; | |
1338 | tmp += ret; | |
1339 | len -= ret; | |
1340 | } | |
1341 | ||
7df2f329 MH |
1342 | return tmp - buf; |
1343 | error: | |
0e43e5d2 | 1344 | pr_debug("Failed to synthesize perf probe argument: %s\n", |
146a1439 MH |
1345 | strerror(-ret)); |
1346 | return ret; | |
7df2f329 MH |
1347 | } |
1348 | ||
4235b045 MH |
1349 | /* Compose only probe point (not argument) */ |
1350 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1351 | { |
fb1587d8 MH |
1352 | char *buf, *tmp; |
1353 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1354 | int ret, len; | |
4de189fe | 1355 | |
e334016f MH |
1356 | buf = zalloc(MAX_CMDLEN); |
1357 | if (buf == NULL) { | |
1358 | ret = -ENOMEM; | |
1359 | goto error; | |
1360 | } | |
4de189fe | 1361 | if (pp->offset) { |
fb1587d8 | 1362 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1363 | if (ret <= 0) |
1364 | goto error; | |
1365 | } | |
1366 | if (pp->line) { | |
fb1587d8 MH |
1367 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1368 | if (ret <= 0) | |
1369 | goto error; | |
1370 | } | |
1371 | if (pp->file) { | |
32ae2ade FBH |
1372 | tmp = pp->file; |
1373 | len = strlen(tmp); | |
1374 | if (len > 30) { | |
1375 | tmp = strchr(pp->file + len - 30, '/'); | |
1376 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1377 | } | |
1378 | ret = e_snprintf(file, 32, "@%s", tmp); | |
4de189fe MH |
1379 | if (ret <= 0) |
1380 | goto error; | |
1381 | } | |
1382 | ||
1383 | if (pp->function) | |
fb1587d8 MH |
1384 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1385 | offs, pp->retprobe ? "%return" : "", line, | |
1386 | file); | |
4de189fe | 1387 | else |
fb1587d8 | 1388 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1389 | if (ret <= 0) |
1390 | goto error; | |
1391 | ||
1392 | return buf; | |
7ef17aaf | 1393 | error: |
0e43e5d2 | 1394 | pr_debug("Failed to synthesize perf probe point: %s\n", |
146a1439 | 1395 | strerror(-ret)); |
f5385650 | 1396 | free(buf); |
146a1439 | 1397 | return NULL; |
7ef17aaf MH |
1398 | } |
1399 | ||
4235b045 MH |
1400 | #if 0 |
1401 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1402 | { |
1403 | char *buf; | |
1404 | int i, len, ret; | |
1405 | ||
4235b045 MH |
1406 | buf = synthesize_perf_probe_point(&pev->point); |
1407 | if (!buf) | |
1408 | return NULL; | |
4de189fe | 1409 | |
4235b045 MH |
1410 | len = strlen(buf); |
1411 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1412 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1413 | pev->args[i].name); |
1414 | if (ret <= 0) { | |
1415 | free(buf); | |
1416 | return NULL; | |
1417 | } | |
4de189fe MH |
1418 | len += ret; |
1419 | } | |
4de189fe | 1420 | |
4235b045 MH |
1421 | return buf; |
1422 | } | |
1423 | #endif | |
1424 | ||
0e60836b | 1425 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1426 | char **buf, size_t *buflen, |
1427 | int depth) | |
1428 | { | |
1429 | int ret; | |
1430 | if (ref->next) { | |
0e60836b | 1431 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1432 | buflen, depth + 1); |
1433 | if (depth < 0) | |
1434 | goto out; | |
1435 | } | |
1436 | ||
1437 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1438 | if (ret < 0) | |
1439 | depth = ret; | |
1440 | else { | |
1441 | *buf += ret; | |
1442 | *buflen -= ret; | |
1443 | } | |
1444 | out: | |
1445 | return depth; | |
4de189fe | 1446 | |
4de189fe MH |
1447 | } |
1448 | ||
0e60836b | 1449 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1450 | char *buf, size_t buflen) |
50656eec | 1451 | { |
0e60836b | 1452 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1453 | int ret, depth = 0; |
1454 | char *tmp = buf; | |
1455 | ||
1456 | /* Argument name or separator */ | |
1457 | if (arg->name) | |
1458 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1459 | else | |
1460 | ret = e_snprintf(buf, buflen, " "); | |
1461 | if (ret < 0) | |
1462 | return ret; | |
1463 | buf += ret; | |
1464 | buflen -= ret; | |
1465 | ||
b7dcb857 MH |
1466 | /* Special case: @XXX */ |
1467 | if (arg->value[0] == '@' && arg->ref) | |
1468 | ref = ref->next; | |
1469 | ||
4235b045 | 1470 | /* Dereferencing arguments */ |
b7dcb857 | 1471 | if (ref) { |
0e60836b | 1472 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1473 | &buflen, 1); |
1474 | if (depth < 0) | |
1475 | return depth; | |
1476 | } | |
1477 | ||
1478 | /* Print argument value */ | |
b7dcb857 MH |
1479 | if (arg->value[0] == '@' && arg->ref) |
1480 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1481 | arg->ref->offset); | |
1482 | else | |
1483 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1484 | if (ret < 0) |
1485 | return ret; | |
1486 | buf += ret; | |
1487 | buflen -= ret; | |
1488 | ||
1489 | /* Closing */ | |
1490 | while (depth--) { | |
1491 | ret = e_snprintf(buf, buflen, ")"); | |
1492 | if (ret < 0) | |
1493 | return ret; | |
1494 | buf += ret; | |
1495 | buflen -= ret; | |
1496 | } | |
4984912e MH |
1497 | /* Print argument type */ |
1498 | if (arg->type) { | |
1499 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1500 | if (ret <= 0) | |
1501 | return ret; | |
1502 | buf += ret; | |
1503 | } | |
4235b045 MH |
1504 | |
1505 | return buf - tmp; | |
1506 | } | |
1507 | ||
0e60836b | 1508 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1509 | { |
0e60836b | 1510 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1511 | char *buf; |
1512 | int i, len, ret; | |
1513 | ||
e334016f MH |
1514 | buf = zalloc(MAX_CMDLEN); |
1515 | if (buf == NULL) | |
1516 | return NULL; | |
1517 | ||
225466f1 SD |
1518 | if (tev->uprobes) |
1519 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s:%s", | |
1520 | tp->retprobe ? 'r' : 'p', | |
1521 | tev->group, tev->event, | |
1522 | tp->module, tp->symbol); | |
1523 | else | |
1524 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s%s%s+%lu", | |
1525 | tp->retprobe ? 'r' : 'p', | |
1526 | tev->group, tev->event, | |
1527 | tp->module ?: "", tp->module ? ":" : "", | |
1528 | tp->symbol, tp->offset); | |
1529 | ||
4235b045 | 1530 | if (len <= 0) |
50656eec | 1531 | goto error; |
50656eec | 1532 | |
4235b045 | 1533 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1534 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1535 | MAX_CMDLEN - len); |
4de189fe | 1536 | if (ret <= 0) |
50656eec MH |
1537 | goto error; |
1538 | len += ret; | |
1539 | } | |
50656eec | 1540 | |
4235b045 | 1541 | return buf; |
50656eec | 1542 | error: |
4235b045 MH |
1543 | free(buf); |
1544 | return NULL; | |
1545 | } | |
50656eec | 1546 | |
0e60836b | 1547 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
225466f1 | 1548 | struct perf_probe_event *pev, bool is_kprobe) |
4235b045 | 1549 | { |
02b95dad | 1550 | char buf[64] = ""; |
146a1439 | 1551 | int i, ret; |
4235b045 | 1552 | |
4b4da7f7 | 1553 | /* Convert event/group name */ |
02b95dad MH |
1554 | pev->event = strdup(tev->event); |
1555 | pev->group = strdup(tev->group); | |
1556 | if (pev->event == NULL || pev->group == NULL) | |
1557 | return -ENOMEM; | |
fb1587d8 | 1558 | |
4b4da7f7 | 1559 | /* Convert trace_point to probe_point */ |
225466f1 SD |
1560 | if (is_kprobe) |
1561 | ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); | |
1562 | else | |
1563 | ret = convert_to_perf_probe_point(&tev->point, &pev->point); | |
1564 | ||
146a1439 MH |
1565 | if (ret < 0) |
1566 | return ret; | |
4b4da7f7 | 1567 | |
4235b045 MH |
1568 | /* Convert trace_arg to probe_arg */ |
1569 | pev->nargs = tev->nargs; | |
e334016f MH |
1570 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1571 | if (pev->args == NULL) | |
1572 | return -ENOMEM; | |
02b95dad | 1573 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1574 | if (tev->args[i].name) |
02b95dad | 1575 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1576 | else { |
0e60836b | 1577 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1578 | buf, 64); |
02b95dad | 1579 | pev->args[i].name = strdup(buf); |
4235b045 | 1580 | } |
02b95dad MH |
1581 | if (pev->args[i].name == NULL && ret >= 0) |
1582 | ret = -ENOMEM; | |
1583 | } | |
146a1439 MH |
1584 | |
1585 | if (ret < 0) | |
1586 | clear_perf_probe_event(pev); | |
1587 | ||
1588 | return ret; | |
4235b045 MH |
1589 | } |
1590 | ||
1591 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1592 | { | |
1593 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1594 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1595 | int i; |
1596 | ||
f5385650 ACM |
1597 | free(pev->event); |
1598 | free(pev->group); | |
1599 | free(pp->file); | |
1600 | free(pp->function); | |
1601 | free(pp->lazy_line); | |
1602 | ||
7df2f329 | 1603 | for (i = 0; i < pev->nargs; i++) { |
f5385650 ACM |
1604 | free(pev->args[i].name); |
1605 | free(pev->args[i].var); | |
1606 | free(pev->args[i].type); | |
7df2f329 MH |
1607 | field = pev->args[i].field; |
1608 | while (field) { | |
1609 | next = field->next; | |
74cf249d | 1610 | zfree(&field->name); |
7df2f329 MH |
1611 | free(field); |
1612 | field = next; | |
1613 | } | |
1614 | } | |
f5385650 | 1615 | free(pev->args); |
4235b045 MH |
1616 | memset(pev, 0, sizeof(*pev)); |
1617 | } | |
1618 | ||
0e60836b | 1619 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1620 | { |
0e60836b | 1621 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1622 | int i; |
1623 | ||
f5385650 ACM |
1624 | free(tev->event); |
1625 | free(tev->group); | |
1626 | free(tev->point.symbol); | |
1627 | free(tev->point.module); | |
4235b045 | 1628 | for (i = 0; i < tev->nargs; i++) { |
f5385650 ACM |
1629 | free(tev->args[i].name); |
1630 | free(tev->args[i].value); | |
1631 | free(tev->args[i].type); | |
4235b045 MH |
1632 | ref = tev->args[i].ref; |
1633 | while (ref) { | |
1634 | next = ref->next; | |
1635 | free(ref); | |
1636 | ref = next; | |
1637 | } | |
1638 | } | |
f5385650 | 1639 | free(tev->args); |
4235b045 | 1640 | memset(tev, 0, sizeof(*tev)); |
50656eec MH |
1641 | } |
1642 | ||
225466f1 SD |
1643 | static void print_warn_msg(const char *file, bool is_kprobe) |
1644 | { | |
1645 | ||
1646 | if (errno == ENOENT) { | |
1647 | const char *config; | |
1648 | ||
1649 | if (!is_kprobe) | |
1650 | config = "CONFIG_UPROBE_EVENTS"; | |
1651 | else | |
1652 | config = "CONFIG_KPROBE_EVENTS"; | |
1653 | ||
1654 | pr_warning("%s file does not exist - please rebuild kernel" | |
1655 | " with %s.\n", file, config); | |
1656 | } else | |
1657 | pr_warning("Failed to open %s file: %s\n", file, | |
1658 | strerror(errno)); | |
1659 | } | |
1660 | ||
1661 | static int open_probe_events(const char *trace_file, bool readwrite, | |
1662 | bool is_kprobe) | |
4de189fe MH |
1663 | { |
1664 | char buf[PATH_MAX]; | |
7ca5989d | 1665 | const char *__debugfs; |
4de189fe MH |
1666 | int ret; |
1667 | ||
7ca5989d MH |
1668 | __debugfs = debugfs_find_mountpoint(); |
1669 | if (__debugfs == NULL) { | |
1670 | pr_warning("Debugfs is not mounted.\n"); | |
1671 | return -ENOENT; | |
1672 | } | |
1673 | ||
225466f1 | 1674 | ret = e_snprintf(buf, PATH_MAX, "%s/%s", __debugfs, trace_file); |
146a1439 | 1675 | if (ret >= 0) { |
7ca5989d | 1676 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1677 | if (readwrite && !probe_event_dry_run) |
1678 | ret = open(buf, O_RDWR, O_APPEND); | |
1679 | else | |
1680 | ret = open(buf, O_RDONLY, 0); | |
f4d7da49 | 1681 | |
225466f1 SD |
1682 | if (ret < 0) |
1683 | print_warn_msg(buf, is_kprobe); | |
4de189fe MH |
1684 | } |
1685 | return ret; | |
1686 | } | |
1687 | ||
225466f1 SD |
1688 | static int open_kprobe_events(bool readwrite) |
1689 | { | |
1690 | return open_probe_events("tracing/kprobe_events", readwrite, true); | |
1691 | } | |
1692 | ||
1693 | static int open_uprobe_events(bool readwrite) | |
1694 | { | |
1695 | return open_probe_events("tracing/uprobe_events", readwrite, false); | |
1696 | } | |
1697 | ||
1698 | /* Get raw string list of current kprobe_events or uprobe_events */ | |
0e60836b | 1699 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1700 | { |
1701 | int ret, idx; | |
1702 | FILE *fp; | |
1703 | char buf[MAX_CMDLEN]; | |
1704 | char *p; | |
1705 | struct strlist *sl; | |
1706 | ||
1707 | sl = strlist__new(true, NULL); | |
1708 | ||
1709 | fp = fdopen(dup(fd), "r"); | |
1710 | while (!feof(fp)) { | |
1711 | p = fgets(buf, MAX_CMDLEN, fp); | |
1712 | if (!p) | |
1713 | break; | |
1714 | ||
1715 | idx = strlen(p) - 1; | |
1716 | if (p[idx] == '\n') | |
1717 | p[idx] = '\0'; | |
1718 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1719 | if (ret < 0) { |
1720 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1721 | strlist__delete(sl); | |
1722 | return NULL; | |
1723 | } | |
4de189fe MH |
1724 | } |
1725 | fclose(fp); | |
1726 | ||
1727 | return sl; | |
1728 | } | |
1729 | ||
278498d4 | 1730 | /* Show an event */ |
146a1439 | 1731 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1732 | { |
7e990a51 | 1733 | int i, ret; |
278498d4 | 1734 | char buf[128]; |
4235b045 | 1735 | char *place; |
278498d4 | 1736 | |
4235b045 MH |
1737 | /* Synthesize only event probe point */ |
1738 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1739 | if (!place) |
1740 | return -EINVAL; | |
4235b045 MH |
1741 | |
1742 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1743 | if (ret < 0) |
146a1439 MH |
1744 | return ret; |
1745 | ||
fb1587d8 | 1746 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1747 | |
4235b045 | 1748 | if (pev->nargs > 0) { |
278498d4 | 1749 | printf(" with"); |
7df2f329 | 1750 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1751 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1752 | buf, 128); | |
1753 | if (ret < 0) | |
1754 | break; | |
7df2f329 MH |
1755 | printf(" %s", buf); |
1756 | } | |
278498d4 MH |
1757 | } |
1758 | printf(")\n"); | |
4235b045 | 1759 | free(place); |
146a1439 | 1760 | return ret; |
278498d4 MH |
1761 | } |
1762 | ||
225466f1 | 1763 | static int __show_perf_probe_events(int fd, bool is_kprobe) |
4de189fe | 1764 | { |
225466f1 | 1765 | int ret = 0; |
0e60836b | 1766 | struct probe_trace_event tev; |
4235b045 | 1767 | struct perf_probe_event pev; |
4de189fe MH |
1768 | struct strlist *rawlist; |
1769 | struct str_node *ent; | |
1770 | ||
4235b045 MH |
1771 | memset(&tev, 0, sizeof(tev)); |
1772 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1773 | |
0e60836b | 1774 | rawlist = get_probe_trace_command_rawlist(fd); |
146a1439 MH |
1775 | if (!rawlist) |
1776 | return -ENOENT; | |
4de189fe | 1777 | |
adf365f4 | 1778 | strlist__for_each(ent, rawlist) { |
0e60836b | 1779 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 | 1780 | if (ret >= 0) { |
225466f1 SD |
1781 | ret = convert_to_perf_probe_event(&tev, &pev, |
1782 | is_kprobe); | |
146a1439 MH |
1783 | if (ret >= 0) |
1784 | ret = show_perf_probe_event(&pev); | |
1785 | } | |
4235b045 | 1786 | clear_perf_probe_event(&pev); |
0e60836b | 1787 | clear_probe_trace_event(&tev); |
146a1439 MH |
1788 | if (ret < 0) |
1789 | break; | |
4de189fe | 1790 | } |
4de189fe | 1791 | strlist__delete(rawlist); |
146a1439 MH |
1792 | |
1793 | return ret; | |
4de189fe MH |
1794 | } |
1795 | ||
225466f1 SD |
1796 | /* List up current perf-probe events */ |
1797 | int show_perf_probe_events(void) | |
1798 | { | |
1799 | int fd, ret; | |
1800 | ||
1801 | setup_pager(); | |
1802 | fd = open_kprobe_events(false); | |
1803 | ||
1804 | if (fd < 0) | |
1805 | return fd; | |
1806 | ||
ee45b6c2 | 1807 | ret = init_symbol_maps(false); |
225466f1 SD |
1808 | if (ret < 0) |
1809 | return ret; | |
1810 | ||
1811 | ret = __show_perf_probe_events(fd, true); | |
1812 | close(fd); | |
1813 | ||
1814 | fd = open_uprobe_events(false); | |
1815 | if (fd >= 0) { | |
1816 | ret = __show_perf_probe_events(fd, false); | |
1817 | close(fd); | |
1818 | } | |
1819 | ||
ee45b6c2 | 1820 | exit_symbol_maps(); |
225466f1 SD |
1821 | return ret; |
1822 | } | |
1823 | ||
b498ce1f | 1824 | /* Get current perf-probe event names */ |
0e60836b | 1825 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1826 | { |
fa28244d | 1827 | char buf[128]; |
b498ce1f MH |
1828 | struct strlist *sl, *rawlist; |
1829 | struct str_node *ent; | |
0e60836b | 1830 | struct probe_trace_event tev; |
146a1439 | 1831 | int ret = 0; |
b498ce1f | 1832 | |
4235b045 | 1833 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 1834 | rawlist = get_probe_trace_command_rawlist(fd); |
e1d2017b | 1835 | sl = strlist__new(true, NULL); |
adf365f4 | 1836 | strlist__for_each(ent, rawlist) { |
0e60836b | 1837 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1838 | if (ret < 0) |
1839 | break; | |
fa28244d | 1840 | if (include_group) { |
146a1439 MH |
1841 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1842 | tev.event); | |
1843 | if (ret >= 0) | |
1844 | ret = strlist__add(sl, buf); | |
fa28244d | 1845 | } else |
146a1439 | 1846 | ret = strlist__add(sl, tev.event); |
0e60836b | 1847 | clear_probe_trace_event(&tev); |
146a1439 MH |
1848 | if (ret < 0) |
1849 | break; | |
b498ce1f | 1850 | } |
b498ce1f MH |
1851 | strlist__delete(rawlist); |
1852 | ||
146a1439 MH |
1853 | if (ret < 0) { |
1854 | strlist__delete(sl); | |
1855 | return NULL; | |
1856 | } | |
b498ce1f MH |
1857 | return sl; |
1858 | } | |
1859 | ||
0e60836b | 1860 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 1861 | { |
6eca8cc3 | 1862 | int ret = 0; |
0e60836b | 1863 | char *buf = synthesize_probe_trace_command(tev); |
50656eec | 1864 | |
146a1439 | 1865 | if (!buf) { |
0e60836b | 1866 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
1867 | return -EINVAL; |
1868 | } | |
1869 | ||
fa28244d | 1870 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1871 | if (!probe_event_dry_run) { |
1872 | ret = write(fd, buf, strlen(buf)); | |
1873 | if (ret <= 0) | |
146a1439 MH |
1874 | pr_warning("Failed to write event: %s\n", |
1875 | strerror(errno)); | |
f4d7da49 | 1876 | } |
4235b045 | 1877 | free(buf); |
146a1439 | 1878 | return ret; |
50656eec MH |
1879 | } |
1880 | ||
146a1439 MH |
1881 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1882 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1883 | { |
1884 | int i, ret; | |
17f88fcd MH |
1885 | |
1886 | /* Try no suffix */ | |
1887 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1888 | if (ret < 0) { |
1889 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1890 | return ret; | |
1891 | } | |
17f88fcd | 1892 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1893 | return 0; |
17f88fcd | 1894 | |
d761b08b MH |
1895 | if (!allow_suffix) { |
1896 | pr_warning("Error: event \"%s\" already exists. " | |
1897 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1898 | return -EEXIST; |
d761b08b MH |
1899 | } |
1900 | ||
17f88fcd MH |
1901 | /* Try to add suffix */ |
1902 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1903 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1904 | if (ret < 0) { |
1905 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1906 | return ret; | |
1907 | } | |
b498ce1f MH |
1908 | if (!strlist__has_entry(namelist, buf)) |
1909 | break; | |
1910 | } | |
146a1439 MH |
1911 | if (i == MAX_EVENT_INDEX) { |
1912 | pr_warning("Too many events are on the same function.\n"); | |
1913 | ret = -ERANGE; | |
1914 | } | |
1915 | ||
1916 | return ret; | |
b498ce1f MH |
1917 | } |
1918 | ||
0e60836b SD |
1919 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
1920 | struct probe_trace_event *tevs, | |
146a1439 | 1921 | int ntevs, bool allow_suffix) |
50656eec | 1922 | { |
146a1439 | 1923 | int i, fd, ret; |
0e60836b | 1924 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
1925 | char buf[64]; |
1926 | const char *event, *group; | |
b498ce1f | 1927 | struct strlist *namelist; |
50656eec | 1928 | |
225466f1 SD |
1929 | if (pev->uprobes) |
1930 | fd = open_uprobe_events(true); | |
1931 | else | |
1932 | fd = open_kprobe_events(true); | |
1933 | ||
146a1439 MH |
1934 | if (fd < 0) |
1935 | return fd; | |
b498ce1f | 1936 | /* Get current event names */ |
0e60836b | 1937 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
1938 | if (!namelist) { |
1939 | pr_debug("Failed to get current event list.\n"); | |
1940 | return -EIO; | |
1941 | } | |
4235b045 | 1942 | |
146a1439 | 1943 | ret = 0; |
a844d1ef | 1944 | printf("Added new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1945 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1946 | tev = &tevs[i]; |
1947 | if (pev->event) | |
1948 | event = pev->event; | |
1949 | else | |
1950 | if (pev->point.function) | |
1951 | event = pev->point.function; | |
1952 | else | |
1953 | event = tev->point.symbol; | |
1954 | if (pev->group) | |
1955 | group = pev->group; | |
1956 | else | |
1957 | group = PERFPROBE_GROUP; | |
1958 | ||
1959 | /* Get an unused new event name */ | |
146a1439 MH |
1960 | ret = get_new_event_name(buf, 64, event, |
1961 | namelist, allow_suffix); | |
1962 | if (ret < 0) | |
1963 | break; | |
4235b045 MH |
1964 | event = buf; |
1965 | ||
02b95dad MH |
1966 | tev->event = strdup(event); |
1967 | tev->group = strdup(group); | |
1968 | if (tev->event == NULL || tev->group == NULL) { | |
1969 | ret = -ENOMEM; | |
1970 | break; | |
1971 | } | |
0e60836b | 1972 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
1973 | if (ret < 0) |
1974 | break; | |
4235b045 MH |
1975 | /* Add added event name to namelist */ |
1976 | strlist__add(namelist, event); | |
1977 | ||
1978 | /* Trick here - save current event/group */ | |
1979 | event = pev->event; | |
1980 | group = pev->group; | |
1981 | pev->event = tev->event; | |
1982 | pev->group = tev->group; | |
1983 | show_perf_probe_event(pev); | |
1984 | /* Trick here - restore current event/group */ | |
1985 | pev->event = (char *)event; | |
1986 | pev->group = (char *)group; | |
1987 | ||
1988 | /* | |
1989 | * Probes after the first probe which comes from same | |
1990 | * user input are always allowed to add suffix, because | |
1991 | * there might be several addresses corresponding to | |
1992 | * one code line. | |
1993 | */ | |
1994 | allow_suffix = true; | |
50656eec | 1995 | } |
146a1439 MH |
1996 | |
1997 | if (ret >= 0) { | |
1998 | /* Show how to use the event. */ | |
a844d1ef | 1999 | printf("\nYou can now use it in all perf tools, such as:\n\n"); |
146a1439 MH |
2000 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, |
2001 | tev->event); | |
2002 | } | |
a9b495b0 | 2003 | |
e1d2017b | 2004 | strlist__delete(namelist); |
50656eec | 2005 | close(fd); |
146a1439 | 2006 | return ret; |
50656eec | 2007 | } |
fa28244d | 2008 | |
0e60836b SD |
2009 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
2010 | struct probe_trace_event **tevs, | |
4eced234 | 2011 | int max_tevs, const char *target) |
e0faa8d3 MH |
2012 | { |
2013 | struct symbol *sym; | |
fb7345bb | 2014 | int ret, i; |
0e60836b | 2015 | struct probe_trace_event *tev; |
4235b045 | 2016 | |
fb7345bb MH |
2017 | if (pev->uprobes && !pev->group) { |
2018 | /* Replace group name if not given */ | |
2019 | ret = convert_exec_to_group(target, &pev->group); | |
2020 | if (ret != 0) { | |
2021 | pr_warning("Failed to make a group name.\n"); | |
2022 | return ret; | |
2023 | } | |
2024 | } | |
2025 | ||
4b4da7f7 | 2026 | /* Convert perf_probe_event with debuginfo */ |
4eced234 | 2027 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, target); |
e334016f | 2028 | if (ret != 0) |
190b57fc | 2029 | return ret; /* Found in debuginfo or got an error */ |
e0faa8d3 | 2030 | |
fb7345bb MH |
2031 | if (pev->uprobes) { |
2032 | ret = convert_name_to_addr(pev, target); | |
2033 | if (ret < 0) | |
2034 | return ret; | |
2035 | } | |
2036 | ||
4235b045 | 2037 | /* Allocate trace event buffer */ |
0e60836b | 2038 | tev = *tevs = zalloc(sizeof(struct probe_trace_event)); |
e334016f MH |
2039 | if (tev == NULL) |
2040 | return -ENOMEM; | |
4235b045 MH |
2041 | |
2042 | /* Copy parameters */ | |
02b95dad MH |
2043 | tev->point.symbol = strdup(pev->point.function); |
2044 | if (tev->point.symbol == NULL) { | |
2045 | ret = -ENOMEM; | |
2046 | goto error; | |
2047 | } | |
ce27a443 | 2048 | |
4eced234 SD |
2049 | if (target) { |
2050 | tev->point.module = strdup(target); | |
ce27a443 JZ |
2051 | if (tev->point.module == NULL) { |
2052 | ret = -ENOMEM; | |
2053 | goto error; | |
2054 | } | |
190b57fc | 2055 | } |
ce27a443 | 2056 | |
4235b045 | 2057 | tev->point.offset = pev->point.offset; |
04ddd04b | 2058 | tev->point.retprobe = pev->point.retprobe; |
4235b045 | 2059 | tev->nargs = pev->nargs; |
225466f1 SD |
2060 | tev->uprobes = pev->uprobes; |
2061 | ||
4235b045 | 2062 | if (tev->nargs) { |
0e60836b | 2063 | tev->args = zalloc(sizeof(struct probe_trace_arg) |
e334016f MH |
2064 | * tev->nargs); |
2065 | if (tev->args == NULL) { | |
02b95dad MH |
2066 | ret = -ENOMEM; |
2067 | goto error; | |
e334016f | 2068 | } |
48481938 | 2069 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
2070 | if (pev->args[i].name) { |
2071 | tev->args[i].name = strdup(pev->args[i].name); | |
2072 | if (tev->args[i].name == NULL) { | |
2073 | ret = -ENOMEM; | |
2074 | goto error; | |
2075 | } | |
2076 | } | |
2077 | tev->args[i].value = strdup(pev->args[i].var); | |
2078 | if (tev->args[i].value == NULL) { | |
2079 | ret = -ENOMEM; | |
2080 | goto error; | |
2081 | } | |
2082 | if (pev->args[i].type) { | |
2083 | tev->args[i].type = strdup(pev->args[i].type); | |
2084 | if (tev->args[i].type == NULL) { | |
2085 | ret = -ENOMEM; | |
2086 | goto error; | |
2087 | } | |
2088 | } | |
48481938 | 2089 | } |
4235b045 MH |
2090 | } |
2091 | ||
225466f1 SD |
2092 | if (pev->uprobes) |
2093 | return 1; | |
2094 | ||
4235b045 | 2095 | /* Currently just checking function name from symbol map */ |
469b9b88 | 2096 | sym = __find_kernel_function_by_name(tev->point.symbol, NULL); |
146a1439 MH |
2097 | if (!sym) { |
2098 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
2099 | tev->point.symbol); | |
02b95dad MH |
2100 | ret = -ENOENT; |
2101 | goto error; | |
1c1bc922 PN |
2102 | } else if (tev->point.offset > sym->end - sym->start) { |
2103 | pr_warning("Offset specified is greater than size of %s\n", | |
2104 | tev->point.symbol); | |
2105 | ret = -ENOENT; | |
2106 | goto error; | |
2107 | ||
02b95dad | 2108 | } |
e334016f | 2109 | |
02b95dad MH |
2110 | return 1; |
2111 | error: | |
0e60836b | 2112 | clear_probe_trace_event(tev); |
02b95dad MH |
2113 | free(tev); |
2114 | *tevs = NULL; | |
e334016f | 2115 | return ret; |
4235b045 MH |
2116 | } |
2117 | ||
2118 | struct __event_package { | |
2119 | struct perf_probe_event *pev; | |
0e60836b | 2120 | struct probe_trace_event *tevs; |
4235b045 MH |
2121 | int ntevs; |
2122 | }; | |
2123 | ||
146a1439 | 2124 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
4eced234 | 2125 | int max_tevs, const char *target, bool force_add) |
4235b045 | 2126 | { |
146a1439 | 2127 | int i, j, ret; |
4235b045 MH |
2128 | struct __event_package *pkgs; |
2129 | ||
225466f1 | 2130 | ret = 0; |
e334016f | 2131 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
225466f1 | 2132 | |
e334016f MH |
2133 | if (pkgs == NULL) |
2134 | return -ENOMEM; | |
4235b045 | 2135 | |
ee45b6c2 | 2136 | ret = init_symbol_maps(pevs->uprobes); |
449e5b24 MH |
2137 | if (ret < 0) { |
2138 | free(pkgs); | |
146a1439 | 2139 | return ret; |
449e5b24 | 2140 | } |
4235b045 MH |
2141 | |
2142 | /* Loop 1: convert all events */ | |
2143 | for (i = 0; i < npevs; i++) { | |
2144 | pkgs[i].pev = &pevs[i]; | |
2145 | /* Convert with or without debuginfo */ | |
0e60836b | 2146 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
2147 | &pkgs[i].tevs, |
2148 | max_tevs, | |
4eced234 | 2149 | target); |
146a1439 MH |
2150 | if (ret < 0) |
2151 | goto end; | |
2152 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
2153 | } |
2154 | ||
4235b045 | 2155 | /* Loop 2: add all events */ |
8635bf6e | 2156 | for (i = 0; i < npevs; i++) { |
0e60836b | 2157 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 | 2158 | pkgs[i].ntevs, force_add); |
fbee632d ACM |
2159 | if (ret < 0) |
2160 | break; | |
2161 | } | |
146a1439 | 2162 | end: |
449e5b24 MH |
2163 | /* Loop 3: cleanup and free trace events */ |
2164 | for (i = 0; i < npevs; i++) { | |
146a1439 | 2165 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 2166 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
74cf249d | 2167 | zfree(&pkgs[i].tevs); |
449e5b24 MH |
2168 | } |
2169 | free(pkgs); | |
ee45b6c2 | 2170 | exit_symbol_maps(); |
146a1439 MH |
2171 | |
2172 | return ret; | |
e0faa8d3 MH |
2173 | } |
2174 | ||
0e60836b | 2175 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
2176 | { |
2177 | char *p; | |
2178 | char buf[128]; | |
4235b045 | 2179 | int ret; |
bbbb521b | 2180 | |
0e60836b | 2181 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
2182 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
2183 | if (ret < 0) | |
2184 | goto error; | |
2185 | ||
bbbb521b | 2186 | p = strchr(buf + 2, ':'); |
146a1439 MH |
2187 | if (!p) { |
2188 | pr_debug("Internal error: %s should have ':' but not.\n", | |
2189 | ent->s); | |
2190 | ret = -ENOTSUP; | |
2191 | goto error; | |
2192 | } | |
bbbb521b MH |
2193 | *p = '/'; |
2194 | ||
4235b045 MH |
2195 | pr_debug("Writing event: %s\n", buf); |
2196 | ret = write(fd, buf, strlen(buf)); | |
44a56040 MH |
2197 | if (ret < 0) { |
2198 | ret = -errno; | |
146a1439 | 2199 | goto error; |
44a56040 | 2200 | } |
146a1439 | 2201 | |
a844d1ef | 2202 | printf("Removed event: %s\n", ent->s); |
146a1439 MH |
2203 | return 0; |
2204 | error: | |
2205 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
2206 | return ret; | |
bbbb521b MH |
2207 | } |
2208 | ||
225466f1 SD |
2209 | static int del_trace_probe_event(int fd, const char *buf, |
2210 | struct strlist *namelist) | |
fa28244d | 2211 | { |
bbbb521b | 2212 | struct str_node *ent, *n; |
225466f1 | 2213 | int ret = -1; |
fa28244d | 2214 | |
bbbb521b MH |
2215 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
2216 | strlist__for_each_safe(ent, n, namelist) | |
2217 | if (strglobmatch(ent->s, buf)) { | |
0e60836b | 2218 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
2219 | if (ret < 0) |
2220 | break; | |
bbbb521b MH |
2221 | strlist__remove(namelist, ent); |
2222 | } | |
2223 | } else { | |
2224 | ent = strlist__find(namelist, buf); | |
2225 | if (ent) { | |
0e60836b | 2226 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
2227 | if (ret >= 0) |
2228 | strlist__remove(namelist, ent); | |
bbbb521b MH |
2229 | } |
2230 | } | |
146a1439 MH |
2231 | |
2232 | return ret; | |
fa28244d MH |
2233 | } |
2234 | ||
146a1439 | 2235 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 2236 | { |
225466f1 SD |
2237 | int ret = -1, ufd = -1, kfd = -1; |
2238 | char buf[128]; | |
fa28244d MH |
2239 | const char *group, *event; |
2240 | char *p, *str; | |
2241 | struct str_node *ent; | |
225466f1 | 2242 | struct strlist *namelist = NULL, *unamelist = NULL; |
146a1439 | 2243 | |
fa28244d | 2244 | /* Get current event names */ |
225466f1 SD |
2245 | kfd = open_kprobe_events(true); |
2246 | if (kfd < 0) | |
2247 | return kfd; | |
2248 | ||
2249 | namelist = get_probe_trace_event_names(kfd, true); | |
2250 | ufd = open_uprobe_events(true); | |
2251 | ||
2252 | if (ufd >= 0) | |
2253 | unamelist = get_probe_trace_event_names(ufd, true); | |
2254 | ||
2255 | if (namelist == NULL && unamelist == NULL) | |
2256 | goto error; | |
fa28244d | 2257 | |
adf365f4 | 2258 | strlist__for_each(ent, dellist) { |
02b95dad MH |
2259 | str = strdup(ent->s); |
2260 | if (str == NULL) { | |
2261 | ret = -ENOMEM; | |
225466f1 | 2262 | goto error; |
02b95dad | 2263 | } |
bbbb521b | 2264 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
2265 | p = strchr(str, ':'); |
2266 | if (p) { | |
2267 | group = str; | |
2268 | *p = '\0'; | |
2269 | event = p + 1; | |
2270 | } else { | |
bbbb521b | 2271 | group = "*"; |
fa28244d MH |
2272 | event = str; |
2273 | } | |
225466f1 SD |
2274 | |
2275 | ret = e_snprintf(buf, 128, "%s:%s", group, event); | |
2276 | if (ret < 0) { | |
2277 | pr_err("Failed to copy event."); | |
2278 | free(str); | |
2279 | goto error; | |
2280 | } | |
2281 | ||
bbbb521b | 2282 | pr_debug("Group: %s, Event: %s\n", group, event); |
225466f1 SD |
2283 | |
2284 | if (namelist) | |
2285 | ret = del_trace_probe_event(kfd, buf, namelist); | |
2286 | ||
2287 | if (unamelist && ret != 0) | |
2288 | ret = del_trace_probe_event(ufd, buf, unamelist); | |
2289 | ||
2290 | if (ret != 0) | |
2291 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
2292 | ||
fa28244d MH |
2293 | free(str); |
2294 | } | |
225466f1 SD |
2295 | |
2296 | error: | |
2297 | if (kfd >= 0) { | |
a23c4dc4 | 2298 | strlist__delete(namelist); |
225466f1 SD |
2299 | close(kfd); |
2300 | } | |
2301 | ||
2302 | if (ufd >= 0) { | |
a23c4dc4 | 2303 | strlist__delete(unamelist); |
225466f1 SD |
2304 | close(ufd); |
2305 | } | |
146a1439 MH |
2306 | |
2307 | return ret; | |
fa28244d | 2308 | } |
225466f1 | 2309 | |
3c42258c MH |
2310 | /* TODO: don't use a global variable for filter ... */ |
2311 | static struct strfilter *available_func_filter; | |
fa28244d | 2312 | |
e80711ca | 2313 | /* |
3c42258c MH |
2314 | * If a symbol corresponds to a function with global binding and |
2315 | * matches filter return 0. For all others return 1. | |
e80711ca | 2316 | */ |
1d037ca1 | 2317 | static int filter_available_functions(struct map *map __maybe_unused, |
3c42258c | 2318 | struct symbol *sym) |
e80711ca | 2319 | { |
3c42258c MH |
2320 | if (sym->binding == STB_GLOBAL && |
2321 | strfilter__compare(available_func_filter, sym->name)) | |
2322 | return 0; | |
2323 | return 1; | |
e80711ca MH |
2324 | } |
2325 | ||
225466f1 SD |
2326 | static int __show_available_funcs(struct map *map) |
2327 | { | |
2328 | if (map__load(map, filter_available_functions)) { | |
2329 | pr_err("Failed to load map.\n"); | |
2330 | return -EINVAL; | |
2331 | } | |
2332 | if (!dso__sorted_by_name(map->dso, map->type)) | |
2333 | dso__sort_by_name(map->dso, map->type); | |
2334 | ||
2335 | dso__fprintf_symbols_by_name(map->dso, map->type, stdout); | |
2336 | return 0; | |
2337 | } | |
2338 | ||
2339 | static int available_kernel_funcs(const char *module) | |
e80711ca MH |
2340 | { |
2341 | struct map *map; | |
2342 | int ret; | |
2343 | ||
ee45b6c2 | 2344 | ret = init_symbol_maps(false); |
e80711ca MH |
2345 | if (ret < 0) |
2346 | return ret; | |
2347 | ||
225466f1 | 2348 | map = kernel_get_module_map(module); |
e80711ca | 2349 | if (!map) { |
225466f1 | 2350 | pr_err("Failed to find %s map.\n", (module) ? : "kernel"); |
e80711ca MH |
2351 | return -EINVAL; |
2352 | } | |
ee45b6c2 MH |
2353 | ret = __show_available_funcs(map); |
2354 | exit_symbol_maps(); | |
2355 | ||
2356 | return ret; | |
225466f1 SD |
2357 | } |
2358 | ||
2359 | static int available_user_funcs(const char *target) | |
2360 | { | |
2361 | struct map *map; | |
2362 | int ret; | |
2363 | ||
ee45b6c2 | 2364 | ret = init_symbol_maps(true); |
225466f1 SD |
2365 | if (ret < 0) |
2366 | return ret; | |
2367 | ||
2368 | map = dso__new_map(target); | |
2369 | ret = __show_available_funcs(map); | |
2370 | dso__delete(map->dso); | |
2371 | map__delete(map); | |
ee45b6c2 | 2372 | exit_symbol_maps(); |
225466f1 SD |
2373 | return ret; |
2374 | } | |
2375 | ||
2376 | int show_available_funcs(const char *target, struct strfilter *_filter, | |
2377 | bool user) | |
2378 | { | |
2379 | setup_pager(); | |
3c42258c | 2380 | available_func_filter = _filter; |
225466f1 SD |
2381 | |
2382 | if (!user) | |
2383 | return available_kernel_funcs(target); | |
2384 | ||
2385 | return available_user_funcs(target); | |
2386 | } | |
2387 | ||
2388 | /* | |
2389 | * uprobe_events only accepts address: | |
2390 | * Convert function and any offset to address | |
2391 | */ | |
2392 | static int convert_name_to_addr(struct perf_probe_event *pev, const char *exec) | |
2393 | { | |
2394 | struct perf_probe_point *pp = &pev->point; | |
2395 | struct symbol *sym; | |
2396 | struct map *map = NULL; | |
8a613d40 | 2397 | char *function = NULL; |
225466f1 SD |
2398 | int ret = -EINVAL; |
2399 | unsigned long long vaddr = 0; | |
2400 | ||
2401 | if (!pp->function) { | |
2402 | pr_warning("No function specified for uprobes"); | |
2403 | goto out; | |
2404 | } | |
2405 | ||
2406 | function = strdup(pp->function); | |
2407 | if (!function) { | |
2408 | pr_warning("Failed to allocate memory by strdup.\n"); | |
2409 | ret = -ENOMEM; | |
2410 | goto out; | |
2411 | } | |
2412 | ||
8a613d40 | 2413 | map = dso__new_map(exec); |
225466f1 SD |
2414 | if (!map) { |
2415 | pr_warning("Cannot find appropriate DSO for %s.\n", exec); | |
2416 | goto out; | |
2417 | } | |
2418 | available_func_filter = strfilter__new(function, NULL); | |
3c42258c | 2419 | if (map__load(map, filter_available_functions)) { |
e80711ca | 2420 | pr_err("Failed to load map.\n"); |
225466f1 | 2421 | goto out; |
e80711ca | 2422 | } |
e80711ca | 2423 | |
225466f1 SD |
2424 | sym = map__find_symbol_by_name(map, function, NULL); |
2425 | if (!sym) { | |
2426 | pr_warning("Cannot find %s in DSO %s\n", function, exec); | |
2427 | goto out; | |
2428 | } | |
2429 | ||
2430 | if (map->start > sym->start) | |
2431 | vaddr = map->start; | |
2432 | vaddr += sym->start + pp->offset + map->pgoff; | |
2433 | pp->offset = 0; | |
2434 | ||
2435 | if (!pev->event) { | |
2436 | pev->event = function; | |
2437 | function = NULL; | |
2438 | } | |
2439 | if (!pev->group) { | |
1fb89448 | 2440 | char *ptr1, *ptr2, *exec_copy; |
225466f1 SD |
2441 | |
2442 | pev->group = zalloc(sizeof(char *) * 64); | |
1fb89448 DA |
2443 | exec_copy = strdup(exec); |
2444 | if (!exec_copy) { | |
2445 | ret = -ENOMEM; | |
2446 | pr_warning("Failed to copy exec string.\n"); | |
2447 | goto out; | |
2448 | } | |
2449 | ||
2450 | ptr1 = strdup(basename(exec_copy)); | |
225466f1 SD |
2451 | if (ptr1) { |
2452 | ptr2 = strpbrk(ptr1, "-._"); | |
2453 | if (ptr2) | |
2454 | *ptr2 = '\0'; | |
2455 | e_snprintf(pev->group, 64, "%s_%s", PERFPROBE_GROUP, | |
2456 | ptr1); | |
2457 | free(ptr1); | |
2458 | } | |
1fb89448 | 2459 | free(exec_copy); |
225466f1 SD |
2460 | } |
2461 | free(pp->function); | |
2462 | pp->function = zalloc(sizeof(char *) * MAX_PROBE_ARGS); | |
2463 | if (!pp->function) { | |
2464 | ret = -ENOMEM; | |
2465 | pr_warning("Failed to allocate memory by zalloc.\n"); | |
2466 | goto out; | |
2467 | } | |
2468 | e_snprintf(pp->function, MAX_PROBE_ARGS, "0x%llx", vaddr); | |
2469 | ret = 0; | |
2470 | ||
2471 | out: | |
2472 | if (map) { | |
2473 | dso__delete(map->dso); | |
2474 | map__delete(map); | |
2475 | } | |
2476 | if (function) | |
2477 | free(function); | |
225466f1 | 2478 | return ret; |
e80711ca | 2479 | } |