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); |
d28c6223 | 76 | static struct machine machine; |
e0faa8d3 | 77 | |
469b9b88 | 78 | /* Initialize symbol maps and path of vmlinux/modules */ |
146a1439 | 79 | static int init_vmlinux(void) |
e0faa8d3 | 80 | { |
146a1439 MH |
81 | int ret; |
82 | ||
e0faa8d3 MH |
83 | symbol_conf.sort_by_name = true; |
84 | if (symbol_conf.vmlinux_name == NULL) | |
85 | symbol_conf.try_vmlinux_path = true; | |
86 | else | |
87 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
146a1439 MH |
88 | ret = symbol__init(); |
89 | if (ret < 0) { | |
90 | pr_debug("Failed to init symbol map.\n"); | |
91 | goto out; | |
92 | } | |
e0faa8d3 | 93 | |
469b9b88 | 94 | ret = machine__init(&machine, "", HOST_KERNEL_ID); |
d28c6223 ACM |
95 | if (ret < 0) |
96 | goto out; | |
97 | ||
469b9b88 | 98 | if (machine__create_kernel_maps(&machine) < 0) { |
0e43e5d2 | 99 | pr_debug("machine__create_kernel_maps() failed.\n"); |
469b9b88 MH |
100 | goto out; |
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 | ||
469b9b88 MH |
108 | static struct symbol *__find_kernel_function_by_name(const char *name, |
109 | struct map **mapp) | |
110 | { | |
111 | return machine__find_kernel_function_by_name(&machine, name, mapp, | |
112 | NULL); | |
113 | } | |
114 | ||
e80711ca MH |
115 | static struct map *kernel_get_module_map(const char *module) |
116 | { | |
117 | struct rb_node *nd; | |
118 | struct map_groups *grp = &machine.kmaps; | |
119 | ||
14a8fd7c MH |
120 | /* A file path -- this is an offline module */ |
121 | if (module && strchr(module, '/')) | |
122 | return machine__new_module(&machine, 0, module); | |
123 | ||
e80711ca MH |
124 | if (!module) |
125 | module = "kernel"; | |
126 | ||
127 | for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) { | |
128 | struct map *pos = rb_entry(nd, struct map, rb_node); | |
129 | if (strncmp(pos->dso->short_name + 1, module, | |
130 | pos->dso->short_name_len - 2) == 0) { | |
131 | return pos; | |
132 | } | |
133 | } | |
134 | return NULL; | |
135 | } | |
136 | ||
137 | static struct dso *kernel_get_module_dso(const char *module) | |
469b9b88 MH |
138 | { |
139 | struct dso *dso; | |
fd930ff9 FBH |
140 | struct map *map; |
141 | const char *vmlinux_name; | |
469b9b88 MH |
142 | |
143 | if (module) { | |
144 | list_for_each_entry(dso, &machine.kernel_dsos, node) { | |
145 | if (strncmp(dso->short_name + 1, module, | |
146 | dso->short_name_len - 2) == 0) | |
147 | goto found; | |
148 | } | |
149 | pr_debug("Failed to find module %s.\n", module); | |
150 | return NULL; | |
fd930ff9 FBH |
151 | } |
152 | ||
153 | map = machine.vmlinux_maps[MAP__FUNCTION]; | |
154 | dso = map->dso; | |
155 | ||
156 | vmlinux_name = symbol_conf.vmlinux_name; | |
157 | if (vmlinux_name) { | |
5230fb7d | 158 | if (dso__load_vmlinux(dso, map, vmlinux_name, false, NULL) <= 0) |
fd930ff9 | 159 | return NULL; |
469b9b88 | 160 | } else { |
c3a34e06 | 161 | if (dso__load_vmlinux_path(dso, map, NULL) <= 0) { |
469b9b88 MH |
162 | pr_debug("Failed to load kernel map.\n"); |
163 | return NULL; | |
164 | } | |
165 | } | |
166 | found: | |
e80711ca MH |
167 | return dso; |
168 | } | |
169 | ||
170 | const char *kernel_get_module_path(const char *module) | |
171 | { | |
172 | struct dso *dso = kernel_get_module_dso(module); | |
173 | return (dso) ? dso->long_name : NULL; | |
469b9b88 MH |
174 | } |
175 | ||
225466f1 SD |
176 | static int init_user_exec(void) |
177 | { | |
178 | int ret = 0; | |
179 | ||
180 | symbol_conf.try_vmlinux_path = false; | |
181 | symbol_conf.sort_by_name = true; | |
182 | ret = symbol__init(); | |
183 | ||
184 | if (ret < 0) | |
185 | pr_debug("Failed to init symbol map.\n"); | |
186 | ||
187 | return ret; | |
188 | } | |
189 | ||
fb7345bb MH |
190 | static int convert_exec_to_group(const char *exec, char **result) |
191 | { | |
192 | char *ptr1, *ptr2, *exec_copy; | |
193 | char buf[64]; | |
194 | int ret; | |
195 | ||
196 | exec_copy = strdup(exec); | |
197 | if (!exec_copy) | |
198 | return -ENOMEM; | |
199 | ||
200 | ptr1 = basename(exec_copy); | |
201 | if (!ptr1) { | |
202 | ret = -EINVAL; | |
203 | goto out; | |
204 | } | |
205 | ||
206 | ptr2 = strpbrk(ptr1, "-._"); | |
207 | if (ptr2) | |
208 | *ptr2 = '\0'; | |
209 | ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1); | |
210 | if (ret < 0) | |
211 | goto out; | |
212 | ||
213 | *result = strdup(buf); | |
214 | ret = *result ? 0 : -ENOMEM; | |
215 | ||
216 | out: | |
217 | free(exec_copy); | |
218 | return ret; | |
219 | } | |
220 | ||
225466f1 SD |
221 | static int convert_to_perf_probe_point(struct probe_trace_point *tp, |
222 | struct perf_probe_point *pp) | |
223 | { | |
224 | pp->function = strdup(tp->symbol); | |
225 | ||
226 | if (pp->function == NULL) | |
227 | return -ENOMEM; | |
228 | ||
229 | pp->offset = tp->offset; | |
230 | pp->retprobe = tp->retprobe; | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
89fe808a | 235 | #ifdef HAVE_DWARF_SUPPORT |
ff741783 MH |
236 | /* Open new debuginfo of given module */ |
237 | static struct debuginfo *open_debuginfo(const char *module) | |
e0faa8d3 | 238 | { |
14a8fd7c | 239 | const char *path; |
ff741783 | 240 | |
14a8fd7c MH |
241 | /* A file path -- this is an offline module */ |
242 | if (module && strchr(module, '/')) | |
243 | path = module; | |
244 | else { | |
245 | path = kernel_get_module_path(module); | |
246 | ||
247 | if (!path) { | |
248 | pr_err("Failed to find path of %s module.\n", | |
249 | module ?: "kernel"); | |
250 | return NULL; | |
251 | } | |
e0faa8d3 | 252 | } |
ff741783 | 253 | return debuginfo__new(path); |
e0faa8d3 | 254 | } |
4b4da7f7 | 255 | |
0e60836b SD |
256 | /* |
257 | * Convert trace point to probe point with debuginfo | |
258 | * Currently only handles kprobes. | |
259 | */ | |
260 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, | |
469b9b88 | 261 | struct perf_probe_point *pp) |
4b4da7f7 MH |
262 | { |
263 | struct symbol *sym; | |
469b9b88 MH |
264 | struct map *map; |
265 | u64 addr; | |
266 | int ret = -ENOENT; | |
ff741783 | 267 | struct debuginfo *dinfo; |
4b4da7f7 | 268 | |
469b9b88 | 269 | sym = __find_kernel_function_by_name(tp->symbol, &map); |
4b4da7f7 | 270 | if (sym) { |
469b9b88 | 271 | addr = map->unmap_ip(map, sym->start + tp->offset); |
9486aa38 | 272 | pr_debug("try to find %s+%ld@%" PRIx64 "\n", tp->symbol, |
469b9b88 | 273 | tp->offset, addr); |
ff741783 MH |
274 | |
275 | dinfo = debuginfo__new_online_kernel(addr); | |
276 | if (dinfo) { | |
277 | ret = debuginfo__find_probe_point(dinfo, | |
278 | (unsigned long)addr, pp); | |
279 | debuginfo__delete(dinfo); | |
280 | } else { | |
281 | pr_debug("Failed to open debuginfo at 0x%" PRIx64 "\n", | |
282 | addr); | |
283 | ret = -ENOENT; | |
284 | } | |
4b4da7f7 MH |
285 | } |
286 | if (ret <= 0) { | |
146a1439 MH |
287 | pr_debug("Failed to find corresponding probes from " |
288 | "debuginfo. Use kprobe event information.\n"); | |
225466f1 | 289 | return convert_to_perf_probe_point(tp, pp); |
4b4da7f7 MH |
290 | } |
291 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
292 | |
293 | return 0; | |
4b4da7f7 MH |
294 | } |
295 | ||
99ca4233 MH |
296 | static int get_text_start_address(const char *exec, unsigned long *address) |
297 | { | |
298 | Elf *elf; | |
299 | GElf_Ehdr ehdr; | |
300 | GElf_Shdr shdr; | |
301 | int fd, ret = -ENOENT; | |
302 | ||
303 | fd = open(exec, O_RDONLY); | |
304 | if (fd < 0) | |
305 | return -errno; | |
306 | ||
307 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
308 | if (elf == NULL) | |
309 | return -EINVAL; | |
310 | ||
311 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
312 | goto out; | |
313 | ||
314 | if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL)) | |
315 | goto out; | |
316 | ||
317 | *address = shdr.sh_addr - shdr.sh_offset; | |
318 | ret = 0; | |
319 | out: | |
320 | elf_end(elf); | |
321 | return ret; | |
322 | } | |
323 | ||
fb7345bb MH |
324 | static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs, |
325 | int ntevs, const char *exec) | |
326 | { | |
327 | int i, ret = 0; | |
328 | unsigned long offset, stext = 0; | |
329 | char buf[32]; | |
330 | ||
331 | if (!exec) | |
332 | return 0; | |
333 | ||
334 | ret = get_text_start_address(exec, &stext); | |
335 | if (ret < 0) | |
336 | return ret; | |
337 | ||
338 | for (i = 0; i < ntevs && ret >= 0; i++) { | |
339 | offset = tevs[i].point.address - stext; | |
340 | offset += tevs[i].point.offset; | |
341 | tevs[i].point.offset = 0; | |
74cf249d | 342 | zfree(&tevs[i].point.symbol); |
fb7345bb MH |
343 | ret = e_snprintf(buf, 32, "0x%lx", offset); |
344 | if (ret < 0) | |
345 | break; | |
346 | tevs[i].point.module = strdup(exec); | |
347 | tevs[i].point.symbol = strdup(buf); | |
348 | if (!tevs[i].point.symbol || !tevs[i].point.module) { | |
349 | ret = -ENOMEM; | |
350 | break; | |
351 | } | |
352 | tevs[i].uprobes = true; | |
353 | } | |
354 | ||
355 | return ret; | |
356 | } | |
357 | ||
190b57fc MH |
358 | static int add_module_to_probe_trace_events(struct probe_trace_event *tevs, |
359 | int ntevs, const char *module) | |
360 | { | |
14a8fd7c MH |
361 | int i, ret = 0; |
362 | char *tmp; | |
363 | ||
364 | if (!module) | |
365 | return 0; | |
366 | ||
367 | tmp = strrchr(module, '/'); | |
368 | if (tmp) { | |
369 | /* This is a module path -- get the module name */ | |
370 | module = strdup(tmp + 1); | |
371 | if (!module) | |
372 | return -ENOMEM; | |
373 | tmp = strchr(module, '.'); | |
374 | if (tmp) | |
375 | *tmp = '\0'; | |
376 | tmp = (char *)module; /* For free() */ | |
377 | } | |
378 | ||
190b57fc MH |
379 | for (i = 0; i < ntevs; i++) { |
380 | tevs[i].point.module = strdup(module); | |
14a8fd7c MH |
381 | if (!tevs[i].point.module) { |
382 | ret = -ENOMEM; | |
383 | break; | |
384 | } | |
190b57fc | 385 | } |
14a8fd7c | 386 | |
f5385650 | 387 | free(tmp); |
14a8fd7c | 388 | return ret; |
190b57fc MH |
389 | } |
390 | ||
981d05ad MH |
391 | static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs) |
392 | { | |
393 | int i; | |
394 | ||
395 | for (i = 0; i < ntevs; i++) | |
396 | clear_probe_trace_event(tevs + i); | |
397 | } | |
398 | ||
4b4da7f7 | 399 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 400 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
190b57fc | 401 | struct probe_trace_event **tevs, |
4eced234 | 402 | int max_tevs, const char *target) |
4b4da7f7 MH |
403 | { |
404 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
225466f1 | 405 | struct debuginfo *dinfo; |
190b57fc | 406 | int ntevs, ret = 0; |
4b4da7f7 | 407 | |
225466f1 SD |
408 | dinfo = open_debuginfo(target); |
409 | ||
ff741783 | 410 | if (!dinfo) { |
146a1439 MH |
411 | if (need_dwarf) { |
412 | pr_warning("Failed to open debuginfo file.\n"); | |
ff741783 | 413 | return -ENOENT; |
146a1439 | 414 | } |
ff741783 | 415 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
416 | return 0; |
417 | } | |
418 | ||
ff741783 MH |
419 | /* Searching trace events corresponding to a probe event */ |
420 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs); | |
421 | ||
422 | debuginfo__delete(dinfo); | |
4b4da7f7 | 423 | |
146a1439 | 424 | if (ntevs > 0) { /* Succeeded to find trace events */ |
0e60836b | 425 | pr_debug("find %d probe_trace_events.\n", ntevs); |
fb7345bb MH |
426 | if (target) { |
427 | if (pev->uprobes) | |
428 | ret = add_exec_to_probe_trace_events(*tevs, | |
429 | ntevs, target); | |
430 | else | |
431 | ret = add_module_to_probe_trace_events(*tevs, | |
432 | ntevs, target); | |
433 | } | |
981d05ad MH |
434 | if (ret < 0) { |
435 | clear_probe_trace_events(*tevs, ntevs); | |
436 | zfree(tevs); | |
437 | } | |
190b57fc | 438 | return ret < 0 ? ret : ntevs; |
146a1439 | 439 | } |
4b4da7f7 | 440 | |
146a1439 MH |
441 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
442 | pr_warning("Probe point '%s' not found.\n", | |
443 | synthesize_perf_probe_point(&pev->point)); | |
444 | return -ENOENT; | |
445 | } | |
446 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
447 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
448 | if (ntevs == -EBADF) { | |
449 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
450 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
451 | if (!need_dwarf) { | |
0e43e5d2 | 452 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
453 | return 0; |
454 | } | |
4b4da7f7 | 455 | } |
15eca306 | 456 | return ntevs; |
4b4da7f7 MH |
457 | } |
458 | ||
7cf0b79e MH |
459 | /* |
460 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
461 | * and chop off leading directories that do not exist. Result is passed back as | |
462 | * a newly allocated path on success. | |
463 | * Return 0 if file was found and readable, -errno otherwise. | |
464 | */ | |
6a330a3c MH |
465 | static int get_real_path(const char *raw_path, const char *comp_dir, |
466 | char **new_path) | |
7cf0b79e | 467 | { |
6a330a3c MH |
468 | const char *prefix = symbol_conf.source_prefix; |
469 | ||
470 | if (!prefix) { | |
471 | if (raw_path[0] != '/' && comp_dir) | |
472 | /* If not an absolute path, try to use comp_dir */ | |
473 | prefix = comp_dir; | |
474 | else { | |
475 | if (access(raw_path, R_OK) == 0) { | |
476 | *new_path = strdup(raw_path); | |
477 | return 0; | |
478 | } else | |
479 | return -errno; | |
480 | } | |
7cf0b79e MH |
481 | } |
482 | ||
6a330a3c | 483 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
7cf0b79e MH |
484 | if (!*new_path) |
485 | return -ENOMEM; | |
486 | ||
487 | for (;;) { | |
6a330a3c | 488 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
7cf0b79e MH |
489 | |
490 | if (access(*new_path, R_OK) == 0) | |
491 | return 0; | |
492 | ||
6a330a3c MH |
493 | if (!symbol_conf.source_prefix) |
494 | /* In case of searching comp_dir, don't retry */ | |
495 | return -errno; | |
496 | ||
7cf0b79e MH |
497 | switch (errno) { |
498 | case ENAMETOOLONG: | |
499 | case ENOENT: | |
500 | case EROFS: | |
501 | case EFAULT: | |
502 | raw_path = strchr(++raw_path, '/'); | |
503 | if (!raw_path) { | |
04662523 | 504 | zfree(new_path); |
7cf0b79e MH |
505 | return -ENOENT; |
506 | } | |
507 | continue; | |
508 | ||
509 | default: | |
04662523 | 510 | zfree(new_path); |
7cf0b79e MH |
511 | return -errno; |
512 | } | |
513 | } | |
514 | } | |
515 | ||
4b4da7f7 MH |
516 | #define LINEBUF_SIZE 256 |
517 | #define NR_ADDITIONAL_LINES 2 | |
518 | ||
fde52dbd | 519 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
520 | { |
521 | char buf[LINEBUF_SIZE]; | |
befe3414 FBH |
522 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
523 | const char *prefix = NULL; | |
4b4da7f7 | 524 | |
befe3414 | 525 | do { |
4b4da7f7 MH |
526 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
527 | goto error; | |
befe3414 FBH |
528 | if (skip) |
529 | continue; | |
530 | if (!prefix) { | |
531 | prefix = show_num ? "%7d " : " "; | |
532 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 533 | } |
befe3414 FBH |
534 | color_fprintf(stdout, color, "%s", buf); |
535 | ||
536 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 537 | |
fde52dbd | 538 | return 1; |
4b4da7f7 | 539 | error: |
fde52dbd | 540 | if (ferror(fp)) { |
32b2b6ec | 541 | pr_warning("File read error: %s\n", strerror(errno)); |
fde52dbd FBH |
542 | return -1; |
543 | } | |
544 | return 0; | |
545 | } | |
146a1439 | 546 | |
fde52dbd FBH |
547 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
548 | { | |
549 | int rv = __show_one_line(fp, l, skip, show_num); | |
550 | if (rv == 0) { | |
551 | pr_warning("Source file is shorter than expected.\n"); | |
552 | rv = -1; | |
553 | } | |
554 | return rv; | |
4b4da7f7 MH |
555 | } |
556 | ||
fde52dbd FBH |
557 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
558 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
559 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
560 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
561 | ||
4b4da7f7 MH |
562 | /* |
563 | * Show line-range always requires debuginfo to find source file and | |
564 | * line number. | |
565 | */ | |
469b9b88 | 566 | int show_line_range(struct line_range *lr, const char *module) |
4b4da7f7 | 567 | { |
d3b63d7a | 568 | int l = 1; |
4b4da7f7 | 569 | struct line_node *ln; |
ff741783 | 570 | struct debuginfo *dinfo; |
4b4da7f7 | 571 | FILE *fp; |
ff741783 | 572 | int ret; |
7cf0b79e | 573 | char *tmp; |
4b4da7f7 MH |
574 | |
575 | /* Search a line range */ | |
146a1439 MH |
576 | ret = init_vmlinux(); |
577 | if (ret < 0) | |
578 | return ret; | |
579 | ||
ff741783 MH |
580 | dinfo = open_debuginfo(module); |
581 | if (!dinfo) { | |
146a1439 | 582 | pr_warning("Failed to open debuginfo file.\n"); |
ff741783 | 583 | return -ENOENT; |
146a1439 MH |
584 | } |
585 | ||
ff741783 MH |
586 | ret = debuginfo__find_line_range(dinfo, lr); |
587 | debuginfo__delete(dinfo); | |
146a1439 MH |
588 | if (ret == 0) { |
589 | pr_warning("Specified source line is not found.\n"); | |
590 | return -ENOENT; | |
591 | } else if (ret < 0) { | |
592 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
593 | return ret; | |
594 | } | |
4b4da7f7 | 595 | |
7cf0b79e MH |
596 | /* Convert source file path */ |
597 | tmp = lr->path; | |
6a330a3c | 598 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
7cf0b79e MH |
599 | free(tmp); /* Free old path */ |
600 | if (ret < 0) { | |
601 | pr_warning("Failed to find source file. (%d)\n", ret); | |
602 | return ret; | |
603 | } | |
604 | ||
4b4da7f7 MH |
605 | setup_pager(); |
606 | ||
607 | if (lr->function) | |
8737ebde | 608 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
609 | lr->start - lr->offset); |
610 | else | |
62c15fc4 | 611 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
612 | |
613 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
614 | if (fp == NULL) { |
615 | pr_warning("Failed to open %s: %s\n", lr->path, | |
616 | strerror(errno)); | |
617 | return -errno; | |
618 | } | |
4b4da7f7 | 619 | /* Skip to starting line number */ |
44b81e92 | 620 | while (l < lr->start) { |
fde52dbd | 621 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
622 | if (ret < 0) |
623 | goto end; | |
624 | } | |
4b4da7f7 MH |
625 | |
626 | list_for_each_entry(ln, &lr->line_list, list) { | |
44b81e92 | 627 | for (; ln->line > l; l++) { |
fde52dbd | 628 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
629 | if (ret < 0) |
630 | goto end; | |
631 | } | |
fde52dbd | 632 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
633 | if (ret < 0) |
634 | goto end; | |
4b4da7f7 MH |
635 | } |
636 | ||
637 | if (lr->end == INT_MAX) | |
638 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
639 | while (l <= lr->end) { |
640 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
641 | if (ret <= 0) | |
44b81e92 FBH |
642 | break; |
643 | } | |
146a1439 | 644 | end: |
4b4da7f7 | 645 | fclose(fp); |
146a1439 | 646 | return ret; |
4b4da7f7 MH |
647 | } |
648 | ||
ff741783 MH |
649 | static int show_available_vars_at(struct debuginfo *dinfo, |
650 | struct perf_probe_event *pev, | |
bd09d7b5 MH |
651 | int max_vls, struct strfilter *_filter, |
652 | bool externs) | |
cf6eb489 MH |
653 | { |
654 | char *buf; | |
bd09d7b5 | 655 | int ret, i, nvars; |
cf6eb489 MH |
656 | struct str_node *node; |
657 | struct variable_list *vls = NULL, *vl; | |
bd09d7b5 | 658 | const char *var; |
cf6eb489 MH |
659 | |
660 | buf = synthesize_perf_probe_point(&pev->point); | |
661 | if (!buf) | |
662 | return -EINVAL; | |
663 | pr_debug("Searching variables at %s\n", buf); | |
664 | ||
ff741783 MH |
665 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls, |
666 | max_vls, externs); | |
bd09d7b5 MH |
667 | if (ret <= 0) { |
668 | pr_err("Failed to find variables at %s (%d)\n", buf, ret); | |
669 | goto end; | |
670 | } | |
671 | /* Some variables are found */ | |
672 | fprintf(stdout, "Available variables at %s\n", buf); | |
673 | for (i = 0; i < ret; i++) { | |
674 | vl = &vls[i]; | |
675 | /* | |
676 | * A probe point might be converted to | |
677 | * several trace points. | |
678 | */ | |
679 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
680 | vl->point.offset); | |
74cf249d | 681 | zfree(&vl->point.symbol); |
bd09d7b5 MH |
682 | nvars = 0; |
683 | if (vl->vars) { | |
684 | strlist__for_each(node, vl->vars) { | |
685 | var = strchr(node->s, '\t') + 1; | |
686 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 687 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
688 | nvars++; |
689 | } | |
690 | } | |
691 | strlist__delete(vl->vars); | |
cf6eb489 | 692 | } |
bd09d7b5 MH |
693 | if (nvars == 0) |
694 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
695 | } | |
696 | free(vls); | |
697 | end: | |
cf6eb489 MH |
698 | free(buf); |
699 | return ret; | |
700 | } | |
701 | ||
702 | /* Show available variables on given probe point */ | |
703 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
bd09d7b5 MH |
704 | int max_vls, const char *module, |
705 | struct strfilter *_filter, bool externs) | |
cf6eb489 | 706 | { |
ff741783 MH |
707 | int i, ret = 0; |
708 | struct debuginfo *dinfo; | |
cf6eb489 MH |
709 | |
710 | ret = init_vmlinux(); | |
711 | if (ret < 0) | |
712 | return ret; | |
713 | ||
ff741783 MH |
714 | dinfo = open_debuginfo(module); |
715 | if (!dinfo) { | |
716 | pr_warning("Failed to open debuginfo file.\n"); | |
717 | return -ENOENT; | |
718 | } | |
719 | ||
cf6eb489 MH |
720 | setup_pager(); |
721 | ||
ff741783 MH |
722 | for (i = 0; i < npevs && ret >= 0; i++) |
723 | ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter, | |
bd09d7b5 | 724 | externs); |
ff741783 MH |
725 | |
726 | debuginfo__delete(dinfo); | |
cf6eb489 MH |
727 | return ret; |
728 | } | |
729 | ||
89fe808a | 730 | #else /* !HAVE_DWARF_SUPPORT */ |
4b4da7f7 | 731 | |
0e60836b | 732 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, |
469b9b88 | 733 | struct perf_probe_point *pp) |
4b4da7f7 | 734 | { |
469b9b88 MH |
735 | struct symbol *sym; |
736 | ||
737 | sym = __find_kernel_function_by_name(tp->symbol, NULL); | |
738 | if (!sym) { | |
739 | pr_err("Failed to find symbol %s in kernel.\n", tp->symbol); | |
740 | return -ENOENT; | |
741 | } | |
146a1439 | 742 | |
225466f1 | 743 | return convert_to_perf_probe_point(tp, pp); |
4b4da7f7 MH |
744 | } |
745 | ||
0e60836b | 746 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
1d037ca1 | 747 | struct probe_trace_event **tevs __maybe_unused, |
1d027ee9 ACM |
748 | int max_tevs __maybe_unused, |
749 | const char *target __maybe_unused) | |
4b4da7f7 | 750 | { |
146a1439 MH |
751 | if (perf_probe_event_need_dwarf(pev)) { |
752 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
753 | return -ENOSYS; | |
754 | } | |
225466f1 | 755 | |
4b4da7f7 MH |
756 | return 0; |
757 | } | |
758 | ||
1d037ca1 IT |
759 | int show_line_range(struct line_range *lr __maybe_unused, |
760 | const char *module __maybe_unused) | |
4b4da7f7 | 761 | { |
146a1439 MH |
762 | pr_warning("Debuginfo-analysis is not supported.\n"); |
763 | return -ENOSYS; | |
4b4da7f7 MH |
764 | } |
765 | ||
1d037ca1 IT |
766 | int show_available_vars(struct perf_probe_event *pevs __maybe_unused, |
767 | int npevs __maybe_unused, int max_vls __maybe_unused, | |
768 | const char *module __maybe_unused, | |
769 | struct strfilter *filter __maybe_unused, | |
770 | bool externs __maybe_unused) | |
cf6eb489 MH |
771 | { |
772 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
773 | return -ENOSYS; | |
774 | } | |
e0faa8d3 MH |
775 | #endif |
776 | ||
e53b00d3 MH |
777 | void line_range__clear(struct line_range *lr) |
778 | { | |
779 | struct line_node *ln; | |
780 | ||
781 | free(lr->function); | |
782 | free(lr->file); | |
783 | free(lr->path); | |
784 | free(lr->comp_dir); | |
785 | while (!list_empty(&lr->line_list)) { | |
786 | ln = list_first_entry(&lr->line_list, struct line_node, list); | |
787 | list_del(&ln->list); | |
788 | free(ln); | |
789 | } | |
790 | memset(lr, 0, sizeof(*lr)); | |
791 | } | |
792 | ||
793 | void line_range__init(struct line_range *lr) | |
794 | { | |
795 | memset(lr, 0, sizeof(*lr)); | |
796 | INIT_LIST_HEAD(&lr->line_list); | |
797 | } | |
798 | ||
21dd9ae5 FBH |
799 | static int parse_line_num(char **ptr, int *val, const char *what) |
800 | { | |
801 | const char *start = *ptr; | |
802 | ||
803 | errno = 0; | |
804 | *val = strtol(*ptr, ptr, 0); | |
805 | if (errno || *ptr == start) { | |
806 | semantic_error("'%s' is not a valid number.\n", what); | |
807 | return -EINVAL; | |
808 | } | |
809 | return 0; | |
810 | } | |
811 | ||
9d95b580 FBH |
812 | /* |
813 | * Stuff 'lr' according to the line range described by 'arg'. | |
814 | * The line range syntax is described by: | |
815 | * | |
816 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 817 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 818 | */ |
146a1439 | 819 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 820 | { |
e116dfa1 | 821 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
822 | int err; |
823 | ||
824 | if (!name) | |
825 | return -ENOMEM; | |
826 | ||
827 | lr->start = 0; | |
828 | lr->end = INT_MAX; | |
829 | ||
830 | range = strchr(name, ':'); | |
831 | if (range) { | |
832 | *range++ = '\0'; | |
833 | ||
834 | err = parse_line_num(&range, &lr->start, "start line"); | |
835 | if (err) | |
836 | goto err; | |
837 | ||
838 | if (*range == '+' || *range == '-') { | |
839 | const char c = *range++; | |
840 | ||
841 | err = parse_line_num(&range, &lr->end, "end line"); | |
842 | if (err) | |
843 | goto err; | |
844 | ||
845 | if (c == '+') { | |
846 | lr->end += lr->start; | |
847 | /* | |
848 | * Adjust the number of lines here. | |
849 | * If the number of lines == 1, the | |
850 | * the end of line should be equal to | |
851 | * the start of line. | |
852 | */ | |
853 | lr->end--; | |
854 | } | |
855 | } | |
9d95b580 | 856 | |
d3b63d7a | 857 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
858 | |
859 | err = -EINVAL; | |
d3b63d7a | 860 | if (lr->start > lr->end) { |
631c9def | 861 | semantic_error("Start line must be smaller" |
146a1439 | 862 | " than end line.\n"); |
21dd9ae5 | 863 | goto err; |
146a1439 | 864 | } |
21dd9ae5 FBH |
865 | if (*range != '\0') { |
866 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
867 | goto err; | |
146a1439 | 868 | } |
d3b63d7a | 869 | } |
02b95dad | 870 | |
e116dfa1 MH |
871 | file = strchr(name, '@'); |
872 | if (file) { | |
873 | *file = '\0'; | |
874 | lr->file = strdup(++file); | |
875 | if (lr->file == NULL) { | |
876 | err = -ENOMEM; | |
877 | goto err; | |
878 | } | |
879 | lr->function = name; | |
880 | } else if (strchr(name, '.')) | |
21dd9ae5 | 881 | lr->file = name; |
631c9def | 882 | else |
21dd9ae5 | 883 | lr->function = name; |
146a1439 MH |
884 | |
885 | return 0; | |
21dd9ae5 FBH |
886 | err: |
887 | free(name); | |
888 | return err; | |
631c9def MH |
889 | } |
890 | ||
b7702a21 MH |
891 | /* Check the name is good for event/group */ |
892 | static bool check_event_name(const char *name) | |
893 | { | |
894 | if (!isalpha(*name) && *name != '_') | |
895 | return false; | |
896 | while (*++name != '\0') { | |
897 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
898 | return false; | |
899 | } | |
900 | return true; | |
901 | } | |
902 | ||
50656eec | 903 | /* Parse probepoint definition. */ |
146a1439 | 904 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 905 | { |
4235b045 | 906 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
907 | char *ptr, *tmp; |
908 | char c, nc = 0; | |
909 | /* | |
910 | * <Syntax> | |
2a9c8c36 MH |
911 | * perf probe [EVENT=]SRC[:LN|;PTN] |
912 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
913 | * |
914 | * TODO:Group name support | |
50656eec MH |
915 | */ |
916 | ||
2a9c8c36 MH |
917 | ptr = strpbrk(arg, ";=@+%"); |
918 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
919 | *ptr = '\0'; |
920 | tmp = ptr + 1; | |
146a1439 MH |
921 | if (strchr(arg, ':')) { |
922 | semantic_error("Group name is not supported yet.\n"); | |
923 | return -ENOTSUP; | |
924 | } | |
925 | if (!check_event_name(arg)) { | |
b7702a21 | 926 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
927 | "follow C symbol-naming rule.\n", arg); |
928 | return -EINVAL; | |
929 | } | |
02b95dad MH |
930 | pev->event = strdup(arg); |
931 | if (pev->event == NULL) | |
932 | return -ENOMEM; | |
4235b045 | 933 | pev->group = NULL; |
af663d75 MH |
934 | arg = tmp; |
935 | } | |
936 | ||
2a9c8c36 | 937 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
938 | if (ptr) { |
939 | nc = *ptr; | |
940 | *ptr++ = '\0'; | |
941 | } | |
942 | ||
02b95dad MH |
943 | tmp = strdup(arg); |
944 | if (tmp == NULL) | |
945 | return -ENOMEM; | |
946 | ||
50656eec | 947 | /* Check arg is function or file and copy it */ |
02b95dad MH |
948 | if (strchr(tmp, '.')) /* File */ |
949 | pp->file = tmp; | |
50656eec | 950 | else /* Function */ |
02b95dad | 951 | pp->function = tmp; |
50656eec MH |
952 | |
953 | /* Parse other options */ | |
954 | while (ptr) { | |
955 | arg = ptr; | |
956 | c = nc; | |
2a9c8c36 | 957 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
958 | pp->lazy_line = strdup(arg); |
959 | if (pp->lazy_line == NULL) | |
960 | return -ENOMEM; | |
2a9c8c36 MH |
961 | break; |
962 | } | |
963 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
964 | if (ptr) { |
965 | nc = *ptr; | |
966 | *ptr++ = '\0'; | |
967 | } | |
968 | switch (c) { | |
969 | case ':': /* Line number */ | |
970 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 971 | if (*tmp != '\0') { |
2a9c8c36 | 972 | semantic_error("There is non-digit char" |
146a1439 MH |
973 | " in line number.\n"); |
974 | return -EINVAL; | |
975 | } | |
50656eec MH |
976 | break; |
977 | case '+': /* Byte offset from a symbol */ | |
978 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 979 | if (*tmp != '\0') { |
2a9c8c36 | 980 | semantic_error("There is non-digit character" |
146a1439 MH |
981 | " in offset.\n"); |
982 | return -EINVAL; | |
983 | } | |
50656eec MH |
984 | break; |
985 | case '@': /* File name */ | |
146a1439 MH |
986 | if (pp->file) { |
987 | semantic_error("SRC@SRC is not allowed.\n"); | |
988 | return -EINVAL; | |
989 | } | |
02b95dad MH |
990 | pp->file = strdup(arg); |
991 | if (pp->file == NULL) | |
992 | return -ENOMEM; | |
50656eec MH |
993 | break; |
994 | case '%': /* Probe places */ | |
995 | if (strcmp(arg, "return") == 0) { | |
996 | pp->retprobe = 1; | |
146a1439 MH |
997 | } else { /* Others not supported yet */ |
998 | semantic_error("%%%s is not supported.\n", arg); | |
999 | return -ENOTSUP; | |
1000 | } | |
50656eec | 1001 | break; |
146a1439 MH |
1002 | default: /* Buggy case */ |
1003 | pr_err("This program has a bug at %s:%d.\n", | |
1004 | __FILE__, __LINE__); | |
1005 | return -ENOTSUP; | |
50656eec MH |
1006 | break; |
1007 | } | |
1008 | } | |
1009 | ||
1010 | /* Exclusion check */ | |
146a1439 | 1011 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
1012 | semantic_error("Lazy pattern can't be used with" |
1013 | " line number.\n"); | |
146a1439 MH |
1014 | return -EINVAL; |
1015 | } | |
2a9c8c36 | 1016 | |
146a1439 | 1017 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 1018 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
1019 | return -EINVAL; |
1020 | } | |
2a9c8c36 | 1021 | |
146a1439 | 1022 | if (pp->line && pp->offset) { |
0e43e5d2 | 1023 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
1024 | return -EINVAL; |
1025 | } | |
50656eec | 1026 | |
146a1439 | 1027 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 1028 | semantic_error("File always requires line number or " |
0e43e5d2 | 1029 | "lazy pattern.\n"); |
146a1439 MH |
1030 | return -EINVAL; |
1031 | } | |
50656eec | 1032 | |
146a1439 | 1033 | if (pp->offset && !pp->function) { |
0e43e5d2 | 1034 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
1035 | return -EINVAL; |
1036 | } | |
50656eec | 1037 | |
146a1439 | 1038 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 1039 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
1040 | return -EINVAL; |
1041 | } | |
50656eec | 1042 | |
146a1439 | 1043 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 1044 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 1045 | "return probe.\n"); |
146a1439 MH |
1046 | return -EINVAL; |
1047 | } | |
50656eec | 1048 | |
4235b045 | 1049 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
1050 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
1051 | pp->lazy_line); | |
146a1439 | 1052 | return 0; |
50656eec MH |
1053 | } |
1054 | ||
7df2f329 | 1055 | /* Parse perf-probe event argument */ |
146a1439 | 1056 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 1057 | { |
b2a3c12b | 1058 | char *tmp, *goodname; |
7df2f329 MH |
1059 | struct perf_probe_arg_field **fieldp; |
1060 | ||
1061 | pr_debug("parsing arg: %s into ", str); | |
1062 | ||
48481938 MH |
1063 | tmp = strchr(str, '='); |
1064 | if (tmp) { | |
02b95dad MH |
1065 | arg->name = strndup(str, tmp - str); |
1066 | if (arg->name == NULL) | |
1067 | return -ENOMEM; | |
11a1ca35 | 1068 | pr_debug("name:%s ", arg->name); |
48481938 MH |
1069 | str = tmp + 1; |
1070 | } | |
1071 | ||
11a1ca35 MH |
1072 | tmp = strchr(str, ':'); |
1073 | if (tmp) { /* Type setting */ | |
1074 | *tmp = '\0'; | |
02b95dad MH |
1075 | arg->type = strdup(tmp + 1); |
1076 | if (arg->type == NULL) | |
1077 | return -ENOMEM; | |
11a1ca35 MH |
1078 | pr_debug("type:%s ", arg->type); |
1079 | } | |
1080 | ||
b2a3c12b | 1081 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
1082 | if (!is_c_varname(str) || !tmp) { |
1083 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
1084 | arg->var = strdup(str); |
1085 | if (arg->var == NULL) | |
1086 | return -ENOMEM; | |
48481938 | 1087 | pr_debug("%s\n", arg->var); |
146a1439 | 1088 | return 0; |
7df2f329 MH |
1089 | } |
1090 | ||
b2a3c12b | 1091 | /* Structure fields or array element */ |
02b95dad MH |
1092 | arg->var = strndup(str, tmp - str); |
1093 | if (arg->var == NULL) | |
1094 | return -ENOMEM; | |
b2a3c12b | 1095 | goodname = arg->var; |
48481938 | 1096 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
1097 | fieldp = &arg->field; |
1098 | ||
1099 | do { | |
e334016f MH |
1100 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
1101 | if (*fieldp == NULL) | |
1102 | return -ENOMEM; | |
b2a3c12b MH |
1103 | if (*tmp == '[') { /* Array */ |
1104 | str = tmp; | |
1105 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 1106 | (*fieldp)->ref = true; |
b2a3c12b MH |
1107 | if (*tmp != ']' || tmp == str + 1) { |
1108 | semantic_error("Array index must be a" | |
1109 | " number.\n"); | |
1110 | return -EINVAL; | |
1111 | } | |
1112 | tmp++; | |
1113 | if (*tmp == '\0') | |
1114 | tmp = NULL; | |
1115 | } else { /* Structure */ | |
1116 | if (*tmp == '.') { | |
1117 | str = tmp + 1; | |
1118 | (*fieldp)->ref = false; | |
1119 | } else if (tmp[1] == '>') { | |
1120 | str = tmp + 2; | |
1121 | (*fieldp)->ref = true; | |
1122 | } else { | |
1123 | semantic_error("Argument parse error: %s\n", | |
1124 | str); | |
1125 | return -EINVAL; | |
1126 | } | |
1127 | tmp = strpbrk(str, "-.["); | |
146a1439 | 1128 | } |
7df2f329 | 1129 | if (tmp) { |
02b95dad MH |
1130 | (*fieldp)->name = strndup(str, tmp - str); |
1131 | if ((*fieldp)->name == NULL) | |
1132 | return -ENOMEM; | |
b2a3c12b MH |
1133 | if (*str != '[') |
1134 | goodname = (*fieldp)->name; | |
7df2f329 MH |
1135 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
1136 | fieldp = &(*fieldp)->next; | |
1137 | } | |
1138 | } while (tmp); | |
02b95dad MH |
1139 | (*fieldp)->name = strdup(str); |
1140 | if ((*fieldp)->name == NULL) | |
1141 | return -ENOMEM; | |
b2a3c12b MH |
1142 | if (*str != '[') |
1143 | goodname = (*fieldp)->name; | |
7df2f329 | 1144 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 1145 | |
b2a3c12b | 1146 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 1147 | if (!arg->name) { |
b2a3c12b | 1148 | arg->name = strdup(goodname); |
02b95dad MH |
1149 | if (arg->name == NULL) |
1150 | return -ENOMEM; | |
1151 | } | |
146a1439 | 1152 | return 0; |
7df2f329 MH |
1153 | } |
1154 | ||
4235b045 | 1155 | /* Parse perf-probe event command */ |
146a1439 | 1156 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1157 | { |
e1c01d61 | 1158 | char **argv; |
146a1439 | 1159 | int argc, i, ret = 0; |
fac13fd5 | 1160 | |
4235b045 | 1161 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1162 | if (!argv) { |
1163 | pr_debug("Failed to split arguments.\n"); | |
1164 | return -ENOMEM; | |
1165 | } | |
1166 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1167 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1168 | ret = -ERANGE; | |
1169 | goto out; | |
1170 | } | |
50656eec | 1171 | /* Parse probe point */ |
146a1439 MH |
1172 | ret = parse_perf_probe_point(argv[0], pev); |
1173 | if (ret < 0) | |
1174 | goto out; | |
50656eec | 1175 | |
e1c01d61 | 1176 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1177 | pev->nargs = argc - 1; |
e334016f MH |
1178 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1179 | if (pev->args == NULL) { | |
1180 | ret = -ENOMEM; | |
1181 | goto out; | |
1182 | } | |
146a1439 MH |
1183 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1184 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1185 | if (ret >= 0 && | |
1186 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1187 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1188 | " kretprobe.\n"); |
1189 | ret = -EINVAL; | |
1190 | } | |
e1c01d61 | 1191 | } |
146a1439 | 1192 | out: |
e1c01d61 | 1193 | argv_free(argv); |
146a1439 MH |
1194 | |
1195 | return ret; | |
50656eec MH |
1196 | } |
1197 | ||
4235b045 MH |
1198 | /* Return true if this perf_probe_event requires debuginfo */ |
1199 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1200 | { | |
1201 | int i; | |
1202 | ||
1203 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
1204 | return true; | |
1205 | ||
1206 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 1207 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
1208 | return true; |
1209 | ||
1210 | return false; | |
1211 | } | |
1212 | ||
0e60836b SD |
1213 | /* Parse probe_events event into struct probe_point */ |
1214 | static int parse_probe_trace_command(const char *cmd, | |
190b57fc | 1215 | struct probe_trace_event *tev) |
4de189fe | 1216 | { |
0e60836b | 1217 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1218 | char pr; |
1219 | char *p; | |
bcbd0040 | 1220 | char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str; |
4de189fe MH |
1221 | int ret, i, argc; |
1222 | char **argv; | |
1223 | ||
0e60836b | 1224 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1225 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1226 | if (!argv) { |
1227 | pr_debug("Failed to split arguments.\n"); | |
1228 | return -ENOMEM; | |
1229 | } | |
1230 | if (argc < 2) { | |
1231 | semantic_error("Too few probe arguments.\n"); | |
1232 | ret = -ERANGE; | |
1233 | goto out; | |
1234 | } | |
4de189fe MH |
1235 | |
1236 | /* Scan event and group name. */ | |
bcbd0040 IT |
1237 | argv0_str = strdup(argv[0]); |
1238 | if (argv0_str == NULL) { | |
1239 | ret = -ENOMEM; | |
1240 | goto out; | |
1241 | } | |
1242 | fmt1_str = strtok_r(argv0_str, ":", &fmt); | |
1243 | fmt2_str = strtok_r(NULL, "/", &fmt); | |
1244 | fmt3_str = strtok_r(NULL, " \t", &fmt); | |
1245 | if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL | |
1246 | || fmt3_str == NULL) { | |
146a1439 MH |
1247 | semantic_error("Failed to parse event name: %s\n", argv[0]); |
1248 | ret = -EINVAL; | |
1249 | goto out; | |
1250 | } | |
bcbd0040 IT |
1251 | pr = fmt1_str[0]; |
1252 | tev->group = strdup(fmt2_str); | |
1253 | tev->event = strdup(fmt3_str); | |
1254 | if (tev->group == NULL || tev->event == NULL) { | |
1255 | ret = -ENOMEM; | |
1256 | goto out; | |
1257 | } | |
4235b045 | 1258 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1259 | |
4235b045 | 1260 | tp->retprobe = (pr == 'r'); |
4de189fe | 1261 | |
190b57fc MH |
1262 | /* Scan module name(if there), function name and offset */ |
1263 | p = strchr(argv[1], ':'); | |
1264 | if (p) { | |
1265 | tp->module = strndup(argv[1], p - argv[1]); | |
1266 | p++; | |
1267 | } else | |
1268 | p = argv[1]; | |
bcbd0040 IT |
1269 | fmt1_str = strtok_r(p, "+", &fmt); |
1270 | tp->symbol = strdup(fmt1_str); | |
1271 | if (tp->symbol == NULL) { | |
1272 | ret = -ENOMEM; | |
1273 | goto out; | |
1274 | } | |
1275 | fmt2_str = strtok_r(NULL, "", &fmt); | |
1276 | if (fmt2_str == NULL) | |
4235b045 | 1277 | tp->offset = 0; |
bcbd0040 IT |
1278 | else |
1279 | tp->offset = strtoul(fmt2_str, NULL, 10); | |
4de189fe | 1280 | |
4235b045 | 1281 | tev->nargs = argc - 2; |
0e60836b | 1282 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1283 | if (tev->args == NULL) { |
1284 | ret = -ENOMEM; | |
1285 | goto out; | |
1286 | } | |
4235b045 | 1287 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1288 | p = strchr(argv[i + 2], '='); |
1289 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1290 | *p++ = '\0'; |
1291 | else | |
1292 | p = argv[i + 2]; | |
02b95dad | 1293 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1294 | /* TODO: parse regs and offset */ |
02b95dad MH |
1295 | tev->args[i].value = strdup(p); |
1296 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1297 | ret = -ENOMEM; | |
1298 | goto out; | |
1299 | } | |
4de189fe | 1300 | } |
146a1439 MH |
1301 | ret = 0; |
1302 | out: | |
bcbd0040 | 1303 | free(argv0_str); |
4de189fe | 1304 | argv_free(argv); |
146a1439 | 1305 | return ret; |
4de189fe MH |
1306 | } |
1307 | ||
7df2f329 MH |
1308 | /* Compose only probe arg */ |
1309 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
1310 | { | |
1311 | struct perf_probe_arg_field *field = pa->field; | |
1312 | int ret; | |
1313 | char *tmp = buf; | |
1314 | ||
48481938 MH |
1315 | if (pa->name && pa->var) |
1316 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
1317 | else | |
1318 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
1319 | if (ret <= 0) |
1320 | goto error; | |
1321 | tmp += ret; | |
1322 | len -= ret; | |
1323 | ||
1324 | while (field) { | |
b2a3c12b MH |
1325 | if (field->name[0] == '[') |
1326 | ret = e_snprintf(tmp, len, "%s", field->name); | |
1327 | else | |
1328 | ret = e_snprintf(tmp, len, "%s%s", | |
1329 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
1330 | if (ret <= 0) |
1331 | goto error; | |
1332 | tmp += ret; | |
1333 | len -= ret; | |
1334 | field = field->next; | |
1335 | } | |
11a1ca35 MH |
1336 | |
1337 | if (pa->type) { | |
1338 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
1339 | if (ret <= 0) | |
1340 | goto error; | |
1341 | tmp += ret; | |
1342 | len -= ret; | |
1343 | } | |
1344 | ||
7df2f329 MH |
1345 | return tmp - buf; |
1346 | error: | |
0e43e5d2 | 1347 | pr_debug("Failed to synthesize perf probe argument: %s\n", |
146a1439 MH |
1348 | strerror(-ret)); |
1349 | return ret; | |
7df2f329 MH |
1350 | } |
1351 | ||
4235b045 MH |
1352 | /* Compose only probe point (not argument) */ |
1353 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1354 | { |
fb1587d8 MH |
1355 | char *buf, *tmp; |
1356 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1357 | int ret, len; | |
4de189fe | 1358 | |
e334016f MH |
1359 | buf = zalloc(MAX_CMDLEN); |
1360 | if (buf == NULL) { | |
1361 | ret = -ENOMEM; | |
1362 | goto error; | |
1363 | } | |
4de189fe | 1364 | if (pp->offset) { |
fb1587d8 | 1365 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1366 | if (ret <= 0) |
1367 | goto error; | |
1368 | } | |
1369 | if (pp->line) { | |
fb1587d8 MH |
1370 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1371 | if (ret <= 0) | |
1372 | goto error; | |
1373 | } | |
1374 | if (pp->file) { | |
32ae2ade FBH |
1375 | tmp = pp->file; |
1376 | len = strlen(tmp); | |
1377 | if (len > 30) { | |
1378 | tmp = strchr(pp->file + len - 30, '/'); | |
1379 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1380 | } | |
1381 | ret = e_snprintf(file, 32, "@%s", tmp); | |
4de189fe MH |
1382 | if (ret <= 0) |
1383 | goto error; | |
1384 | } | |
1385 | ||
1386 | if (pp->function) | |
fb1587d8 MH |
1387 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1388 | offs, pp->retprobe ? "%return" : "", line, | |
1389 | file); | |
4de189fe | 1390 | else |
fb1587d8 | 1391 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1392 | if (ret <= 0) |
1393 | goto error; | |
1394 | ||
1395 | return buf; | |
7ef17aaf | 1396 | error: |
0e43e5d2 | 1397 | pr_debug("Failed to synthesize perf probe point: %s\n", |
146a1439 | 1398 | strerror(-ret)); |
f5385650 | 1399 | free(buf); |
146a1439 | 1400 | return NULL; |
7ef17aaf MH |
1401 | } |
1402 | ||
4235b045 MH |
1403 | #if 0 |
1404 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1405 | { |
1406 | char *buf; | |
1407 | int i, len, ret; | |
1408 | ||
4235b045 MH |
1409 | buf = synthesize_perf_probe_point(&pev->point); |
1410 | if (!buf) | |
1411 | return NULL; | |
4de189fe | 1412 | |
4235b045 MH |
1413 | len = strlen(buf); |
1414 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1415 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1416 | pev->args[i].name); |
1417 | if (ret <= 0) { | |
1418 | free(buf); | |
1419 | return NULL; | |
1420 | } | |
4de189fe MH |
1421 | len += ret; |
1422 | } | |
4de189fe | 1423 | |
4235b045 MH |
1424 | return buf; |
1425 | } | |
1426 | #endif | |
1427 | ||
0e60836b | 1428 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1429 | char **buf, size_t *buflen, |
1430 | int depth) | |
1431 | { | |
1432 | int ret; | |
1433 | if (ref->next) { | |
0e60836b | 1434 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1435 | buflen, depth + 1); |
1436 | if (depth < 0) | |
1437 | goto out; | |
1438 | } | |
1439 | ||
1440 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1441 | if (ret < 0) | |
1442 | depth = ret; | |
1443 | else { | |
1444 | *buf += ret; | |
1445 | *buflen -= ret; | |
1446 | } | |
1447 | out: | |
1448 | return depth; | |
4de189fe | 1449 | |
4de189fe MH |
1450 | } |
1451 | ||
0e60836b | 1452 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1453 | char *buf, size_t buflen) |
50656eec | 1454 | { |
0e60836b | 1455 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1456 | int ret, depth = 0; |
1457 | char *tmp = buf; | |
1458 | ||
1459 | /* Argument name or separator */ | |
1460 | if (arg->name) | |
1461 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1462 | else | |
1463 | ret = e_snprintf(buf, buflen, " "); | |
1464 | if (ret < 0) | |
1465 | return ret; | |
1466 | buf += ret; | |
1467 | buflen -= ret; | |
1468 | ||
b7dcb857 MH |
1469 | /* Special case: @XXX */ |
1470 | if (arg->value[0] == '@' && arg->ref) | |
1471 | ref = ref->next; | |
1472 | ||
4235b045 | 1473 | /* Dereferencing arguments */ |
b7dcb857 | 1474 | if (ref) { |
0e60836b | 1475 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1476 | &buflen, 1); |
1477 | if (depth < 0) | |
1478 | return depth; | |
1479 | } | |
1480 | ||
1481 | /* Print argument value */ | |
b7dcb857 MH |
1482 | if (arg->value[0] == '@' && arg->ref) |
1483 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1484 | arg->ref->offset); | |
1485 | else | |
1486 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1487 | if (ret < 0) |
1488 | return ret; | |
1489 | buf += ret; | |
1490 | buflen -= ret; | |
1491 | ||
1492 | /* Closing */ | |
1493 | while (depth--) { | |
1494 | ret = e_snprintf(buf, buflen, ")"); | |
1495 | if (ret < 0) | |
1496 | return ret; | |
1497 | buf += ret; | |
1498 | buflen -= ret; | |
1499 | } | |
4984912e MH |
1500 | /* Print argument type */ |
1501 | if (arg->type) { | |
1502 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1503 | if (ret <= 0) | |
1504 | return ret; | |
1505 | buf += ret; | |
1506 | } | |
4235b045 MH |
1507 | |
1508 | return buf - tmp; | |
1509 | } | |
1510 | ||
0e60836b | 1511 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1512 | { |
0e60836b | 1513 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1514 | char *buf; |
1515 | int i, len, ret; | |
1516 | ||
e334016f MH |
1517 | buf = zalloc(MAX_CMDLEN); |
1518 | if (buf == NULL) | |
1519 | return NULL; | |
1520 | ||
225466f1 SD |
1521 | if (tev->uprobes) |
1522 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s:%s", | |
1523 | tp->retprobe ? 'r' : 'p', | |
1524 | tev->group, tev->event, | |
1525 | tp->module, tp->symbol); | |
1526 | else | |
1527 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s%s%s+%lu", | |
1528 | tp->retprobe ? 'r' : 'p', | |
1529 | tev->group, tev->event, | |
1530 | tp->module ?: "", tp->module ? ":" : "", | |
1531 | tp->symbol, tp->offset); | |
1532 | ||
4235b045 | 1533 | if (len <= 0) |
50656eec | 1534 | goto error; |
50656eec | 1535 | |
4235b045 | 1536 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1537 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1538 | MAX_CMDLEN - len); |
4de189fe | 1539 | if (ret <= 0) |
50656eec MH |
1540 | goto error; |
1541 | len += ret; | |
1542 | } | |
50656eec | 1543 | |
4235b045 | 1544 | return buf; |
50656eec | 1545 | error: |
4235b045 MH |
1546 | free(buf); |
1547 | return NULL; | |
1548 | } | |
50656eec | 1549 | |
0e60836b | 1550 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
225466f1 | 1551 | struct perf_probe_event *pev, bool is_kprobe) |
4235b045 | 1552 | { |
02b95dad | 1553 | char buf[64] = ""; |
146a1439 | 1554 | int i, ret; |
4235b045 | 1555 | |
4b4da7f7 | 1556 | /* Convert event/group name */ |
02b95dad MH |
1557 | pev->event = strdup(tev->event); |
1558 | pev->group = strdup(tev->group); | |
1559 | if (pev->event == NULL || pev->group == NULL) | |
1560 | return -ENOMEM; | |
fb1587d8 | 1561 | |
4b4da7f7 | 1562 | /* Convert trace_point to probe_point */ |
225466f1 SD |
1563 | if (is_kprobe) |
1564 | ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); | |
1565 | else | |
1566 | ret = convert_to_perf_probe_point(&tev->point, &pev->point); | |
1567 | ||
146a1439 MH |
1568 | if (ret < 0) |
1569 | return ret; | |
4b4da7f7 | 1570 | |
4235b045 MH |
1571 | /* Convert trace_arg to probe_arg */ |
1572 | pev->nargs = tev->nargs; | |
e334016f MH |
1573 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1574 | if (pev->args == NULL) | |
1575 | return -ENOMEM; | |
02b95dad | 1576 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1577 | if (tev->args[i].name) |
02b95dad | 1578 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1579 | else { |
0e60836b | 1580 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1581 | buf, 64); |
02b95dad | 1582 | pev->args[i].name = strdup(buf); |
4235b045 | 1583 | } |
02b95dad MH |
1584 | if (pev->args[i].name == NULL && ret >= 0) |
1585 | ret = -ENOMEM; | |
1586 | } | |
146a1439 MH |
1587 | |
1588 | if (ret < 0) | |
1589 | clear_perf_probe_event(pev); | |
1590 | ||
1591 | return ret; | |
4235b045 MH |
1592 | } |
1593 | ||
1594 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1595 | { | |
1596 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1597 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1598 | int i; |
1599 | ||
f5385650 ACM |
1600 | free(pev->event); |
1601 | free(pev->group); | |
1602 | free(pp->file); | |
1603 | free(pp->function); | |
1604 | free(pp->lazy_line); | |
1605 | ||
7df2f329 | 1606 | for (i = 0; i < pev->nargs; i++) { |
f5385650 ACM |
1607 | free(pev->args[i].name); |
1608 | free(pev->args[i].var); | |
1609 | free(pev->args[i].type); | |
7df2f329 MH |
1610 | field = pev->args[i].field; |
1611 | while (field) { | |
1612 | next = field->next; | |
74cf249d | 1613 | zfree(&field->name); |
7df2f329 MH |
1614 | free(field); |
1615 | field = next; | |
1616 | } | |
1617 | } | |
f5385650 | 1618 | free(pev->args); |
4235b045 MH |
1619 | memset(pev, 0, sizeof(*pev)); |
1620 | } | |
1621 | ||
0e60836b | 1622 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1623 | { |
0e60836b | 1624 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1625 | int i; |
1626 | ||
f5385650 ACM |
1627 | free(tev->event); |
1628 | free(tev->group); | |
1629 | free(tev->point.symbol); | |
1630 | free(tev->point.module); | |
4235b045 | 1631 | for (i = 0; i < tev->nargs; i++) { |
f5385650 ACM |
1632 | free(tev->args[i].name); |
1633 | free(tev->args[i].value); | |
1634 | free(tev->args[i].type); | |
4235b045 MH |
1635 | ref = tev->args[i].ref; |
1636 | while (ref) { | |
1637 | next = ref->next; | |
1638 | free(ref); | |
1639 | ref = next; | |
1640 | } | |
1641 | } | |
f5385650 | 1642 | free(tev->args); |
4235b045 | 1643 | memset(tev, 0, sizeof(*tev)); |
50656eec MH |
1644 | } |
1645 | ||
225466f1 SD |
1646 | static void print_warn_msg(const char *file, bool is_kprobe) |
1647 | { | |
1648 | ||
1649 | if (errno == ENOENT) { | |
1650 | const char *config; | |
1651 | ||
1652 | if (!is_kprobe) | |
1653 | config = "CONFIG_UPROBE_EVENTS"; | |
1654 | else | |
1655 | config = "CONFIG_KPROBE_EVENTS"; | |
1656 | ||
1657 | pr_warning("%s file does not exist - please rebuild kernel" | |
1658 | " with %s.\n", file, config); | |
1659 | } else | |
1660 | pr_warning("Failed to open %s file: %s\n", file, | |
1661 | strerror(errno)); | |
1662 | } | |
1663 | ||
1664 | static int open_probe_events(const char *trace_file, bool readwrite, | |
1665 | bool is_kprobe) | |
4de189fe MH |
1666 | { |
1667 | char buf[PATH_MAX]; | |
7ca5989d | 1668 | const char *__debugfs; |
4de189fe MH |
1669 | int ret; |
1670 | ||
7ca5989d MH |
1671 | __debugfs = debugfs_find_mountpoint(); |
1672 | if (__debugfs == NULL) { | |
1673 | pr_warning("Debugfs is not mounted.\n"); | |
1674 | return -ENOENT; | |
1675 | } | |
1676 | ||
225466f1 | 1677 | ret = e_snprintf(buf, PATH_MAX, "%s/%s", __debugfs, trace_file); |
146a1439 | 1678 | if (ret >= 0) { |
7ca5989d | 1679 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1680 | if (readwrite && !probe_event_dry_run) |
1681 | ret = open(buf, O_RDWR, O_APPEND); | |
1682 | else | |
1683 | ret = open(buf, O_RDONLY, 0); | |
f4d7da49 | 1684 | |
225466f1 SD |
1685 | if (ret < 0) |
1686 | print_warn_msg(buf, is_kprobe); | |
4de189fe MH |
1687 | } |
1688 | return ret; | |
1689 | } | |
1690 | ||
225466f1 SD |
1691 | static int open_kprobe_events(bool readwrite) |
1692 | { | |
1693 | return open_probe_events("tracing/kprobe_events", readwrite, true); | |
1694 | } | |
1695 | ||
1696 | static int open_uprobe_events(bool readwrite) | |
1697 | { | |
1698 | return open_probe_events("tracing/uprobe_events", readwrite, false); | |
1699 | } | |
1700 | ||
1701 | /* Get raw string list of current kprobe_events or uprobe_events */ | |
0e60836b | 1702 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1703 | { |
1704 | int ret, idx; | |
1705 | FILE *fp; | |
1706 | char buf[MAX_CMDLEN]; | |
1707 | char *p; | |
1708 | struct strlist *sl; | |
1709 | ||
1710 | sl = strlist__new(true, NULL); | |
1711 | ||
1712 | fp = fdopen(dup(fd), "r"); | |
1713 | while (!feof(fp)) { | |
1714 | p = fgets(buf, MAX_CMDLEN, fp); | |
1715 | if (!p) | |
1716 | break; | |
1717 | ||
1718 | idx = strlen(p) - 1; | |
1719 | if (p[idx] == '\n') | |
1720 | p[idx] = '\0'; | |
1721 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1722 | if (ret < 0) { |
1723 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1724 | strlist__delete(sl); | |
1725 | return NULL; | |
1726 | } | |
4de189fe MH |
1727 | } |
1728 | fclose(fp); | |
1729 | ||
1730 | return sl; | |
1731 | } | |
1732 | ||
278498d4 | 1733 | /* Show an event */ |
146a1439 | 1734 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1735 | { |
7e990a51 | 1736 | int i, ret; |
278498d4 | 1737 | char buf[128]; |
4235b045 | 1738 | char *place; |
278498d4 | 1739 | |
4235b045 MH |
1740 | /* Synthesize only event probe point */ |
1741 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1742 | if (!place) |
1743 | return -EINVAL; | |
4235b045 MH |
1744 | |
1745 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1746 | if (ret < 0) |
146a1439 MH |
1747 | return ret; |
1748 | ||
fb1587d8 | 1749 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1750 | |
4235b045 | 1751 | if (pev->nargs > 0) { |
278498d4 | 1752 | printf(" with"); |
7df2f329 | 1753 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1754 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1755 | buf, 128); | |
1756 | if (ret < 0) | |
1757 | break; | |
7df2f329 MH |
1758 | printf(" %s", buf); |
1759 | } | |
278498d4 MH |
1760 | } |
1761 | printf(")\n"); | |
4235b045 | 1762 | free(place); |
146a1439 | 1763 | return ret; |
278498d4 MH |
1764 | } |
1765 | ||
225466f1 | 1766 | static int __show_perf_probe_events(int fd, bool is_kprobe) |
4de189fe | 1767 | { |
225466f1 | 1768 | int ret = 0; |
0e60836b | 1769 | struct probe_trace_event tev; |
4235b045 | 1770 | struct perf_probe_event pev; |
4de189fe MH |
1771 | struct strlist *rawlist; |
1772 | struct str_node *ent; | |
1773 | ||
4235b045 MH |
1774 | memset(&tev, 0, sizeof(tev)); |
1775 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1776 | |
0e60836b | 1777 | rawlist = get_probe_trace_command_rawlist(fd); |
146a1439 MH |
1778 | if (!rawlist) |
1779 | return -ENOENT; | |
4de189fe | 1780 | |
adf365f4 | 1781 | strlist__for_each(ent, rawlist) { |
0e60836b | 1782 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 | 1783 | if (ret >= 0) { |
225466f1 SD |
1784 | ret = convert_to_perf_probe_event(&tev, &pev, |
1785 | is_kprobe); | |
146a1439 MH |
1786 | if (ret >= 0) |
1787 | ret = show_perf_probe_event(&pev); | |
1788 | } | |
4235b045 | 1789 | clear_perf_probe_event(&pev); |
0e60836b | 1790 | clear_probe_trace_event(&tev); |
146a1439 MH |
1791 | if (ret < 0) |
1792 | break; | |
4de189fe | 1793 | } |
4de189fe | 1794 | strlist__delete(rawlist); |
146a1439 MH |
1795 | |
1796 | return ret; | |
4de189fe MH |
1797 | } |
1798 | ||
225466f1 SD |
1799 | /* List up current perf-probe events */ |
1800 | int show_perf_probe_events(void) | |
1801 | { | |
1802 | int fd, ret; | |
1803 | ||
1804 | setup_pager(); | |
1805 | fd = open_kprobe_events(false); | |
1806 | ||
1807 | if (fd < 0) | |
1808 | return fd; | |
1809 | ||
1810 | ret = init_vmlinux(); | |
1811 | if (ret < 0) | |
1812 | return ret; | |
1813 | ||
1814 | ret = __show_perf_probe_events(fd, true); | |
1815 | close(fd); | |
1816 | ||
1817 | fd = open_uprobe_events(false); | |
1818 | if (fd >= 0) { | |
1819 | ret = __show_perf_probe_events(fd, false); | |
1820 | close(fd); | |
1821 | } | |
1822 | ||
1823 | return ret; | |
1824 | } | |
1825 | ||
b498ce1f | 1826 | /* Get current perf-probe event names */ |
0e60836b | 1827 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1828 | { |
fa28244d | 1829 | char buf[128]; |
b498ce1f MH |
1830 | struct strlist *sl, *rawlist; |
1831 | struct str_node *ent; | |
0e60836b | 1832 | struct probe_trace_event tev; |
146a1439 | 1833 | int ret = 0; |
b498ce1f | 1834 | |
4235b045 | 1835 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 1836 | rawlist = get_probe_trace_command_rawlist(fd); |
e1d2017b | 1837 | sl = strlist__new(true, NULL); |
adf365f4 | 1838 | strlist__for_each(ent, rawlist) { |
0e60836b | 1839 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1840 | if (ret < 0) |
1841 | break; | |
fa28244d | 1842 | if (include_group) { |
146a1439 MH |
1843 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1844 | tev.event); | |
1845 | if (ret >= 0) | |
1846 | ret = strlist__add(sl, buf); | |
fa28244d | 1847 | } else |
146a1439 | 1848 | ret = strlist__add(sl, tev.event); |
0e60836b | 1849 | clear_probe_trace_event(&tev); |
146a1439 MH |
1850 | if (ret < 0) |
1851 | break; | |
b498ce1f | 1852 | } |
b498ce1f MH |
1853 | strlist__delete(rawlist); |
1854 | ||
146a1439 MH |
1855 | if (ret < 0) { |
1856 | strlist__delete(sl); | |
1857 | return NULL; | |
1858 | } | |
b498ce1f MH |
1859 | return sl; |
1860 | } | |
1861 | ||
0e60836b | 1862 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 1863 | { |
6eca8cc3 | 1864 | int ret = 0; |
0e60836b | 1865 | char *buf = synthesize_probe_trace_command(tev); |
50656eec | 1866 | |
146a1439 | 1867 | if (!buf) { |
0e60836b | 1868 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
1869 | return -EINVAL; |
1870 | } | |
1871 | ||
fa28244d | 1872 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1873 | if (!probe_event_dry_run) { |
1874 | ret = write(fd, buf, strlen(buf)); | |
1875 | if (ret <= 0) | |
146a1439 MH |
1876 | pr_warning("Failed to write event: %s\n", |
1877 | strerror(errno)); | |
f4d7da49 | 1878 | } |
4235b045 | 1879 | free(buf); |
146a1439 | 1880 | return ret; |
50656eec MH |
1881 | } |
1882 | ||
146a1439 MH |
1883 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1884 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1885 | { |
1886 | int i, ret; | |
17f88fcd MH |
1887 | |
1888 | /* Try no suffix */ | |
1889 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1890 | if (ret < 0) { |
1891 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1892 | return ret; | |
1893 | } | |
17f88fcd | 1894 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1895 | return 0; |
17f88fcd | 1896 | |
d761b08b MH |
1897 | if (!allow_suffix) { |
1898 | pr_warning("Error: event \"%s\" already exists. " | |
1899 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1900 | return -EEXIST; |
d761b08b MH |
1901 | } |
1902 | ||
17f88fcd MH |
1903 | /* Try to add suffix */ |
1904 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1905 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1906 | if (ret < 0) { |
1907 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1908 | return ret; | |
1909 | } | |
b498ce1f MH |
1910 | if (!strlist__has_entry(namelist, buf)) |
1911 | break; | |
1912 | } | |
146a1439 MH |
1913 | if (i == MAX_EVENT_INDEX) { |
1914 | pr_warning("Too many events are on the same function.\n"); | |
1915 | ret = -ERANGE; | |
1916 | } | |
1917 | ||
1918 | return ret; | |
b498ce1f MH |
1919 | } |
1920 | ||
0e60836b SD |
1921 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
1922 | struct probe_trace_event *tevs, | |
146a1439 | 1923 | int ntevs, bool allow_suffix) |
50656eec | 1924 | { |
146a1439 | 1925 | int i, fd, ret; |
0e60836b | 1926 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
1927 | char buf[64]; |
1928 | const char *event, *group; | |
b498ce1f | 1929 | struct strlist *namelist; |
50656eec | 1930 | |
225466f1 SD |
1931 | if (pev->uprobes) |
1932 | fd = open_uprobe_events(true); | |
1933 | else | |
1934 | fd = open_kprobe_events(true); | |
1935 | ||
146a1439 MH |
1936 | if (fd < 0) |
1937 | return fd; | |
b498ce1f | 1938 | /* Get current event names */ |
0e60836b | 1939 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
1940 | if (!namelist) { |
1941 | pr_debug("Failed to get current event list.\n"); | |
1942 | return -EIO; | |
1943 | } | |
4235b045 | 1944 | |
146a1439 | 1945 | ret = 0; |
a844d1ef | 1946 | printf("Added new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1947 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1948 | tev = &tevs[i]; |
1949 | if (pev->event) | |
1950 | event = pev->event; | |
1951 | else | |
1952 | if (pev->point.function) | |
1953 | event = pev->point.function; | |
1954 | else | |
1955 | event = tev->point.symbol; | |
1956 | if (pev->group) | |
1957 | group = pev->group; | |
1958 | else | |
1959 | group = PERFPROBE_GROUP; | |
1960 | ||
1961 | /* Get an unused new event name */ | |
146a1439 MH |
1962 | ret = get_new_event_name(buf, 64, event, |
1963 | namelist, allow_suffix); | |
1964 | if (ret < 0) | |
1965 | break; | |
4235b045 MH |
1966 | event = buf; |
1967 | ||
02b95dad MH |
1968 | tev->event = strdup(event); |
1969 | tev->group = strdup(group); | |
1970 | if (tev->event == NULL || tev->group == NULL) { | |
1971 | ret = -ENOMEM; | |
1972 | break; | |
1973 | } | |
0e60836b | 1974 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
1975 | if (ret < 0) |
1976 | break; | |
4235b045 MH |
1977 | /* Add added event name to namelist */ |
1978 | strlist__add(namelist, event); | |
1979 | ||
1980 | /* Trick here - save current event/group */ | |
1981 | event = pev->event; | |
1982 | group = pev->group; | |
1983 | pev->event = tev->event; | |
1984 | pev->group = tev->group; | |
1985 | show_perf_probe_event(pev); | |
1986 | /* Trick here - restore current event/group */ | |
1987 | pev->event = (char *)event; | |
1988 | pev->group = (char *)group; | |
1989 | ||
1990 | /* | |
1991 | * Probes after the first probe which comes from same | |
1992 | * user input are always allowed to add suffix, because | |
1993 | * there might be several addresses corresponding to | |
1994 | * one code line. | |
1995 | */ | |
1996 | allow_suffix = true; | |
50656eec | 1997 | } |
146a1439 MH |
1998 | |
1999 | if (ret >= 0) { | |
2000 | /* Show how to use the event. */ | |
a844d1ef | 2001 | printf("\nYou can now use it in all perf tools, such as:\n\n"); |
146a1439 MH |
2002 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, |
2003 | tev->event); | |
2004 | } | |
a9b495b0 | 2005 | |
e1d2017b | 2006 | strlist__delete(namelist); |
50656eec | 2007 | close(fd); |
146a1439 | 2008 | return ret; |
50656eec | 2009 | } |
fa28244d | 2010 | |
0e60836b SD |
2011 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
2012 | struct probe_trace_event **tevs, | |
4eced234 | 2013 | int max_tevs, const char *target) |
e0faa8d3 MH |
2014 | { |
2015 | struct symbol *sym; | |
fb7345bb | 2016 | int ret, i; |
0e60836b | 2017 | struct probe_trace_event *tev; |
4235b045 | 2018 | |
fb7345bb MH |
2019 | if (pev->uprobes && !pev->group) { |
2020 | /* Replace group name if not given */ | |
2021 | ret = convert_exec_to_group(target, &pev->group); | |
2022 | if (ret != 0) { | |
2023 | pr_warning("Failed to make a group name.\n"); | |
2024 | return ret; | |
2025 | } | |
2026 | } | |
2027 | ||
4b4da7f7 | 2028 | /* Convert perf_probe_event with debuginfo */ |
4eced234 | 2029 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, target); |
e334016f | 2030 | if (ret != 0) |
190b57fc | 2031 | return ret; /* Found in debuginfo or got an error */ |
e0faa8d3 | 2032 | |
fb7345bb MH |
2033 | if (pev->uprobes) { |
2034 | ret = convert_name_to_addr(pev, target); | |
2035 | if (ret < 0) | |
2036 | return ret; | |
2037 | } | |
2038 | ||
4235b045 | 2039 | /* Allocate trace event buffer */ |
0e60836b | 2040 | tev = *tevs = zalloc(sizeof(struct probe_trace_event)); |
e334016f MH |
2041 | if (tev == NULL) |
2042 | return -ENOMEM; | |
4235b045 MH |
2043 | |
2044 | /* Copy parameters */ | |
02b95dad MH |
2045 | tev->point.symbol = strdup(pev->point.function); |
2046 | if (tev->point.symbol == NULL) { | |
2047 | ret = -ENOMEM; | |
2048 | goto error; | |
2049 | } | |
ce27a443 | 2050 | |
4eced234 SD |
2051 | if (target) { |
2052 | tev->point.module = strdup(target); | |
ce27a443 JZ |
2053 | if (tev->point.module == NULL) { |
2054 | ret = -ENOMEM; | |
2055 | goto error; | |
2056 | } | |
190b57fc | 2057 | } |
ce27a443 | 2058 | |
4235b045 | 2059 | tev->point.offset = pev->point.offset; |
04ddd04b | 2060 | tev->point.retprobe = pev->point.retprobe; |
4235b045 | 2061 | tev->nargs = pev->nargs; |
225466f1 SD |
2062 | tev->uprobes = pev->uprobes; |
2063 | ||
4235b045 | 2064 | if (tev->nargs) { |
0e60836b | 2065 | tev->args = zalloc(sizeof(struct probe_trace_arg) |
e334016f MH |
2066 | * tev->nargs); |
2067 | if (tev->args == NULL) { | |
02b95dad MH |
2068 | ret = -ENOMEM; |
2069 | goto error; | |
e334016f | 2070 | } |
48481938 | 2071 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
2072 | if (pev->args[i].name) { |
2073 | tev->args[i].name = strdup(pev->args[i].name); | |
2074 | if (tev->args[i].name == NULL) { | |
2075 | ret = -ENOMEM; | |
2076 | goto error; | |
2077 | } | |
2078 | } | |
2079 | tev->args[i].value = strdup(pev->args[i].var); | |
2080 | if (tev->args[i].value == NULL) { | |
2081 | ret = -ENOMEM; | |
2082 | goto error; | |
2083 | } | |
2084 | if (pev->args[i].type) { | |
2085 | tev->args[i].type = strdup(pev->args[i].type); | |
2086 | if (tev->args[i].type == NULL) { | |
2087 | ret = -ENOMEM; | |
2088 | goto error; | |
2089 | } | |
2090 | } | |
48481938 | 2091 | } |
4235b045 MH |
2092 | } |
2093 | ||
225466f1 SD |
2094 | if (pev->uprobes) |
2095 | return 1; | |
2096 | ||
4235b045 | 2097 | /* Currently just checking function name from symbol map */ |
469b9b88 | 2098 | sym = __find_kernel_function_by_name(tev->point.symbol, NULL); |
146a1439 MH |
2099 | if (!sym) { |
2100 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
2101 | tev->point.symbol); | |
02b95dad MH |
2102 | ret = -ENOENT; |
2103 | goto error; | |
1c1bc922 PN |
2104 | } else if (tev->point.offset > sym->end - sym->start) { |
2105 | pr_warning("Offset specified is greater than size of %s\n", | |
2106 | tev->point.symbol); | |
2107 | ret = -ENOENT; | |
2108 | goto error; | |
2109 | ||
02b95dad | 2110 | } |
e334016f | 2111 | |
02b95dad MH |
2112 | return 1; |
2113 | error: | |
0e60836b | 2114 | clear_probe_trace_event(tev); |
02b95dad MH |
2115 | free(tev); |
2116 | *tevs = NULL; | |
e334016f | 2117 | return ret; |
4235b045 MH |
2118 | } |
2119 | ||
2120 | struct __event_package { | |
2121 | struct perf_probe_event *pev; | |
0e60836b | 2122 | struct probe_trace_event *tevs; |
4235b045 MH |
2123 | int ntevs; |
2124 | }; | |
2125 | ||
146a1439 | 2126 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
4eced234 | 2127 | int max_tevs, const char *target, bool force_add) |
4235b045 | 2128 | { |
146a1439 | 2129 | int i, j, ret; |
4235b045 MH |
2130 | struct __event_package *pkgs; |
2131 | ||
225466f1 | 2132 | ret = 0; |
e334016f | 2133 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
225466f1 | 2134 | |
e334016f MH |
2135 | if (pkgs == NULL) |
2136 | return -ENOMEM; | |
4235b045 | 2137 | |
225466f1 SD |
2138 | if (!pevs->uprobes) |
2139 | /* Init vmlinux path */ | |
2140 | ret = init_vmlinux(); | |
2141 | else | |
2142 | ret = init_user_exec(); | |
2143 | ||
449e5b24 MH |
2144 | if (ret < 0) { |
2145 | free(pkgs); | |
146a1439 | 2146 | return ret; |
449e5b24 | 2147 | } |
4235b045 MH |
2148 | |
2149 | /* Loop 1: convert all events */ | |
2150 | for (i = 0; i < npevs; i++) { | |
2151 | pkgs[i].pev = &pevs[i]; | |
2152 | /* Convert with or without debuginfo */ | |
0e60836b | 2153 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
2154 | &pkgs[i].tevs, |
2155 | max_tevs, | |
4eced234 | 2156 | target); |
146a1439 MH |
2157 | if (ret < 0) |
2158 | goto end; | |
2159 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
2160 | } |
2161 | ||
4235b045 | 2162 | /* Loop 2: add all events */ |
8635bf6e | 2163 | for (i = 0; i < npevs; i++) { |
0e60836b | 2164 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 | 2165 | pkgs[i].ntevs, force_add); |
fbee632d ACM |
2166 | if (ret < 0) |
2167 | break; | |
2168 | } | |
146a1439 | 2169 | end: |
449e5b24 MH |
2170 | /* Loop 3: cleanup and free trace events */ |
2171 | for (i = 0; i < npevs; i++) { | |
146a1439 | 2172 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 2173 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
74cf249d | 2174 | zfree(&pkgs[i].tevs); |
449e5b24 MH |
2175 | } |
2176 | free(pkgs); | |
146a1439 MH |
2177 | |
2178 | return ret; | |
e0faa8d3 MH |
2179 | } |
2180 | ||
0e60836b | 2181 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
2182 | { |
2183 | char *p; | |
2184 | char buf[128]; | |
4235b045 | 2185 | int ret; |
bbbb521b | 2186 | |
0e60836b | 2187 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
2188 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
2189 | if (ret < 0) | |
2190 | goto error; | |
2191 | ||
bbbb521b | 2192 | p = strchr(buf + 2, ':'); |
146a1439 MH |
2193 | if (!p) { |
2194 | pr_debug("Internal error: %s should have ':' but not.\n", | |
2195 | ent->s); | |
2196 | ret = -ENOTSUP; | |
2197 | goto error; | |
2198 | } | |
bbbb521b MH |
2199 | *p = '/'; |
2200 | ||
4235b045 MH |
2201 | pr_debug("Writing event: %s\n", buf); |
2202 | ret = write(fd, buf, strlen(buf)); | |
44a56040 MH |
2203 | if (ret < 0) { |
2204 | ret = -errno; | |
146a1439 | 2205 | goto error; |
44a56040 | 2206 | } |
146a1439 | 2207 | |
a844d1ef | 2208 | printf("Removed event: %s\n", ent->s); |
146a1439 MH |
2209 | return 0; |
2210 | error: | |
2211 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
2212 | return ret; | |
bbbb521b MH |
2213 | } |
2214 | ||
225466f1 SD |
2215 | static int del_trace_probe_event(int fd, const char *buf, |
2216 | struct strlist *namelist) | |
fa28244d | 2217 | { |
bbbb521b | 2218 | struct str_node *ent, *n; |
225466f1 | 2219 | int ret = -1; |
fa28244d | 2220 | |
bbbb521b MH |
2221 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
2222 | strlist__for_each_safe(ent, n, namelist) | |
2223 | if (strglobmatch(ent->s, buf)) { | |
0e60836b | 2224 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
2225 | if (ret < 0) |
2226 | break; | |
bbbb521b MH |
2227 | strlist__remove(namelist, ent); |
2228 | } | |
2229 | } else { | |
2230 | ent = strlist__find(namelist, buf); | |
2231 | if (ent) { | |
0e60836b | 2232 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
2233 | if (ret >= 0) |
2234 | strlist__remove(namelist, ent); | |
bbbb521b MH |
2235 | } |
2236 | } | |
146a1439 MH |
2237 | |
2238 | return ret; | |
fa28244d MH |
2239 | } |
2240 | ||
146a1439 | 2241 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 2242 | { |
225466f1 SD |
2243 | int ret = -1, ufd = -1, kfd = -1; |
2244 | char buf[128]; | |
fa28244d MH |
2245 | const char *group, *event; |
2246 | char *p, *str; | |
2247 | struct str_node *ent; | |
225466f1 | 2248 | struct strlist *namelist = NULL, *unamelist = NULL; |
146a1439 | 2249 | |
fa28244d | 2250 | /* Get current event names */ |
225466f1 SD |
2251 | kfd = open_kprobe_events(true); |
2252 | if (kfd < 0) | |
2253 | return kfd; | |
2254 | ||
2255 | namelist = get_probe_trace_event_names(kfd, true); | |
2256 | ufd = open_uprobe_events(true); | |
2257 | ||
2258 | if (ufd >= 0) | |
2259 | unamelist = get_probe_trace_event_names(ufd, true); | |
2260 | ||
2261 | if (namelist == NULL && unamelist == NULL) | |
2262 | goto error; | |
fa28244d | 2263 | |
adf365f4 | 2264 | strlist__for_each(ent, dellist) { |
02b95dad MH |
2265 | str = strdup(ent->s); |
2266 | if (str == NULL) { | |
2267 | ret = -ENOMEM; | |
225466f1 | 2268 | goto error; |
02b95dad | 2269 | } |
bbbb521b | 2270 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
2271 | p = strchr(str, ':'); |
2272 | if (p) { | |
2273 | group = str; | |
2274 | *p = '\0'; | |
2275 | event = p + 1; | |
2276 | } else { | |
bbbb521b | 2277 | group = "*"; |
fa28244d MH |
2278 | event = str; |
2279 | } | |
225466f1 SD |
2280 | |
2281 | ret = e_snprintf(buf, 128, "%s:%s", group, event); | |
2282 | if (ret < 0) { | |
2283 | pr_err("Failed to copy event."); | |
2284 | free(str); | |
2285 | goto error; | |
2286 | } | |
2287 | ||
bbbb521b | 2288 | pr_debug("Group: %s, Event: %s\n", group, event); |
225466f1 SD |
2289 | |
2290 | if (namelist) | |
2291 | ret = del_trace_probe_event(kfd, buf, namelist); | |
2292 | ||
2293 | if (unamelist && ret != 0) | |
2294 | ret = del_trace_probe_event(ufd, buf, unamelist); | |
2295 | ||
2296 | if (ret != 0) | |
2297 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
2298 | ||
fa28244d MH |
2299 | free(str); |
2300 | } | |
225466f1 SD |
2301 | |
2302 | error: | |
2303 | if (kfd >= 0) { | |
a23c4dc4 | 2304 | strlist__delete(namelist); |
225466f1 SD |
2305 | close(kfd); |
2306 | } | |
2307 | ||
2308 | if (ufd >= 0) { | |
a23c4dc4 | 2309 | strlist__delete(unamelist); |
225466f1 SD |
2310 | close(ufd); |
2311 | } | |
146a1439 MH |
2312 | |
2313 | return ret; | |
fa28244d | 2314 | } |
225466f1 | 2315 | |
3c42258c MH |
2316 | /* TODO: don't use a global variable for filter ... */ |
2317 | static struct strfilter *available_func_filter; | |
fa28244d | 2318 | |
e80711ca | 2319 | /* |
3c42258c MH |
2320 | * If a symbol corresponds to a function with global binding and |
2321 | * matches filter return 0. For all others return 1. | |
e80711ca | 2322 | */ |
1d037ca1 | 2323 | static int filter_available_functions(struct map *map __maybe_unused, |
3c42258c | 2324 | struct symbol *sym) |
e80711ca | 2325 | { |
3c42258c MH |
2326 | if (sym->binding == STB_GLOBAL && |
2327 | strfilter__compare(available_func_filter, sym->name)) | |
2328 | return 0; | |
2329 | return 1; | |
e80711ca MH |
2330 | } |
2331 | ||
225466f1 SD |
2332 | static int __show_available_funcs(struct map *map) |
2333 | { | |
2334 | if (map__load(map, filter_available_functions)) { | |
2335 | pr_err("Failed to load map.\n"); | |
2336 | return -EINVAL; | |
2337 | } | |
2338 | if (!dso__sorted_by_name(map->dso, map->type)) | |
2339 | dso__sort_by_name(map->dso, map->type); | |
2340 | ||
2341 | dso__fprintf_symbols_by_name(map->dso, map->type, stdout); | |
2342 | return 0; | |
2343 | } | |
2344 | ||
2345 | static int available_kernel_funcs(const char *module) | |
e80711ca MH |
2346 | { |
2347 | struct map *map; | |
2348 | int ret; | |
2349 | ||
e80711ca MH |
2350 | ret = init_vmlinux(); |
2351 | if (ret < 0) | |
2352 | return ret; | |
2353 | ||
225466f1 | 2354 | map = kernel_get_module_map(module); |
e80711ca | 2355 | if (!map) { |
225466f1 | 2356 | pr_err("Failed to find %s map.\n", (module) ? : "kernel"); |
e80711ca MH |
2357 | return -EINVAL; |
2358 | } | |
225466f1 SD |
2359 | return __show_available_funcs(map); |
2360 | } | |
2361 | ||
2362 | static int available_user_funcs(const char *target) | |
2363 | { | |
2364 | struct map *map; | |
2365 | int ret; | |
2366 | ||
2367 | ret = init_user_exec(); | |
2368 | if (ret < 0) | |
2369 | return ret; | |
2370 | ||
2371 | map = dso__new_map(target); | |
2372 | ret = __show_available_funcs(map); | |
2373 | dso__delete(map->dso); | |
2374 | map__delete(map); | |
2375 | return ret; | |
2376 | } | |
2377 | ||
2378 | int show_available_funcs(const char *target, struct strfilter *_filter, | |
2379 | bool user) | |
2380 | { | |
2381 | setup_pager(); | |
3c42258c | 2382 | available_func_filter = _filter; |
225466f1 SD |
2383 | |
2384 | if (!user) | |
2385 | return available_kernel_funcs(target); | |
2386 | ||
2387 | return available_user_funcs(target); | |
2388 | } | |
2389 | ||
2390 | /* | |
2391 | * uprobe_events only accepts address: | |
2392 | * Convert function and any offset to address | |
2393 | */ | |
2394 | static int convert_name_to_addr(struct perf_probe_event *pev, const char *exec) | |
2395 | { | |
2396 | struct perf_probe_point *pp = &pev->point; | |
2397 | struct symbol *sym; | |
2398 | struct map *map = NULL; | |
8a613d40 | 2399 | char *function = NULL; |
225466f1 SD |
2400 | int ret = -EINVAL; |
2401 | unsigned long long vaddr = 0; | |
2402 | ||
2403 | if (!pp->function) { | |
2404 | pr_warning("No function specified for uprobes"); | |
2405 | goto out; | |
2406 | } | |
2407 | ||
2408 | function = strdup(pp->function); | |
2409 | if (!function) { | |
2410 | pr_warning("Failed to allocate memory by strdup.\n"); | |
2411 | ret = -ENOMEM; | |
2412 | goto out; | |
2413 | } | |
2414 | ||
8a613d40 | 2415 | map = dso__new_map(exec); |
225466f1 SD |
2416 | if (!map) { |
2417 | pr_warning("Cannot find appropriate DSO for %s.\n", exec); | |
2418 | goto out; | |
2419 | } | |
2420 | available_func_filter = strfilter__new(function, NULL); | |
3c42258c | 2421 | if (map__load(map, filter_available_functions)) { |
e80711ca | 2422 | pr_err("Failed to load map.\n"); |
225466f1 | 2423 | goto out; |
e80711ca | 2424 | } |
e80711ca | 2425 | |
225466f1 SD |
2426 | sym = map__find_symbol_by_name(map, function, NULL); |
2427 | if (!sym) { | |
2428 | pr_warning("Cannot find %s in DSO %s\n", function, exec); | |
2429 | goto out; | |
2430 | } | |
2431 | ||
2432 | if (map->start > sym->start) | |
2433 | vaddr = map->start; | |
2434 | vaddr += sym->start + pp->offset + map->pgoff; | |
2435 | pp->offset = 0; | |
2436 | ||
2437 | if (!pev->event) { | |
2438 | pev->event = function; | |
2439 | function = NULL; | |
2440 | } | |
2441 | if (!pev->group) { | |
1fb89448 | 2442 | char *ptr1, *ptr2, *exec_copy; |
225466f1 SD |
2443 | |
2444 | pev->group = zalloc(sizeof(char *) * 64); | |
1fb89448 DA |
2445 | exec_copy = strdup(exec); |
2446 | if (!exec_copy) { | |
2447 | ret = -ENOMEM; | |
2448 | pr_warning("Failed to copy exec string.\n"); | |
2449 | goto out; | |
2450 | } | |
2451 | ||
2452 | ptr1 = strdup(basename(exec_copy)); | |
225466f1 SD |
2453 | if (ptr1) { |
2454 | ptr2 = strpbrk(ptr1, "-._"); | |
2455 | if (ptr2) | |
2456 | *ptr2 = '\0'; | |
2457 | e_snprintf(pev->group, 64, "%s_%s", PERFPROBE_GROUP, | |
2458 | ptr1); | |
2459 | free(ptr1); | |
2460 | } | |
1fb89448 | 2461 | free(exec_copy); |
225466f1 SD |
2462 | } |
2463 | free(pp->function); | |
2464 | pp->function = zalloc(sizeof(char *) * MAX_PROBE_ARGS); | |
2465 | if (!pp->function) { | |
2466 | ret = -ENOMEM; | |
2467 | pr_warning("Failed to allocate memory by zalloc.\n"); | |
2468 | goto out; | |
2469 | } | |
2470 | e_snprintf(pp->function, MAX_PROBE_ARGS, "0x%llx", vaddr); | |
2471 | ret = 0; | |
2472 | ||
2473 | out: | |
2474 | if (map) { | |
2475 | dso__delete(map->dso); | |
2476 | map__delete(map); | |
2477 | } | |
2478 | if (function) | |
2479 | free(function); | |
225466f1 | 2480 | return ret; |
e80711ca | 2481 | } |