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" |
e1c01d61 | 37 | #include "string.h" |
4de189fe | 38 | #include "strlist.h" |
50656eec | 39 | #include "debug.h" |
72041334 | 40 | #include "cache.h" |
631c9def | 41 | #include "color.h" |
e0faa8d3 MH |
42 | #include "symbol.h" |
43 | #include "thread.h" | |
7ca5989d | 44 | #include "debugfs.h" |
4b4da7f7 | 45 | #include "trace-event.h" /* For __unused */ |
50656eec | 46 | #include "probe-event.h" |
4235b045 | 47 | #include "probe-finder.h" |
50656eec MH |
48 | |
49 | #define MAX_CMDLEN 256 | |
50 | #define MAX_PROBE_ARGS 128 | |
51 | #define PERFPROBE_GROUP "probe" | |
52 | ||
f4d7da49 MH |
53 | bool probe_event_dry_run; /* Dry run flag */ |
54 | ||
146a1439 | 55 | #define semantic_error(msg ...) pr_err("Semantic error :" msg) |
50656eec | 56 | |
4de189fe | 57 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
58 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
59 | __attribute__((format(printf, 3, 4))); | |
60 | ||
4de189fe MH |
61 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
62 | { | |
63 | int ret; | |
64 | va_list ap; | |
65 | va_start(ap, format); | |
66 | ret = vsnprintf(str, size, format, ap); | |
67 | va_end(ap); | |
68 | if (ret >= (int)size) | |
69 | ret = -E2BIG; | |
70 | return ret; | |
71 | } | |
72 | ||
4b4da7f7 | 73 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp); |
d28c6223 | 74 | static struct machine machine; |
e0faa8d3 | 75 | |
469b9b88 | 76 | /* Initialize symbol maps and path of vmlinux/modules */ |
146a1439 | 77 | static int init_vmlinux(void) |
e0faa8d3 | 78 | { |
146a1439 MH |
79 | int ret; |
80 | ||
e0faa8d3 MH |
81 | symbol_conf.sort_by_name = true; |
82 | if (symbol_conf.vmlinux_name == NULL) | |
83 | symbol_conf.try_vmlinux_path = true; | |
84 | else | |
85 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
146a1439 MH |
86 | ret = symbol__init(); |
87 | if (ret < 0) { | |
88 | pr_debug("Failed to init symbol map.\n"); | |
89 | goto out; | |
90 | } | |
e0faa8d3 | 91 | |
469b9b88 | 92 | ret = machine__init(&machine, "", HOST_KERNEL_ID); |
d28c6223 ACM |
93 | if (ret < 0) |
94 | goto out; | |
95 | ||
469b9b88 | 96 | if (machine__create_kernel_maps(&machine) < 0) { |
0e43e5d2 | 97 | pr_debug("machine__create_kernel_maps() failed.\n"); |
469b9b88 MH |
98 | goto out; |
99 | } | |
146a1439 MH |
100 | out: |
101 | if (ret < 0) | |
102 | pr_warning("Failed to init vmlinux path.\n"); | |
103 | return ret; | |
e0faa8d3 MH |
104 | } |
105 | ||
469b9b88 MH |
106 | static struct symbol *__find_kernel_function_by_name(const char *name, |
107 | struct map **mapp) | |
108 | { | |
109 | return machine__find_kernel_function_by_name(&machine, name, mapp, | |
110 | NULL); | |
111 | } | |
112 | ||
e80711ca MH |
113 | static struct map *kernel_get_module_map(const char *module) |
114 | { | |
115 | struct rb_node *nd; | |
116 | struct map_groups *grp = &machine.kmaps; | |
117 | ||
14a8fd7c MH |
118 | /* A file path -- this is an offline module */ |
119 | if (module && strchr(module, '/')) | |
120 | return machine__new_module(&machine, 0, module); | |
121 | ||
e80711ca MH |
122 | if (!module) |
123 | module = "kernel"; | |
124 | ||
125 | for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) { | |
126 | struct map *pos = rb_entry(nd, struct map, rb_node); | |
127 | if (strncmp(pos->dso->short_name + 1, module, | |
128 | pos->dso->short_name_len - 2) == 0) { | |
129 | return pos; | |
130 | } | |
131 | } | |
132 | return NULL; | |
133 | } | |
134 | ||
135 | static struct dso *kernel_get_module_dso(const char *module) | |
469b9b88 MH |
136 | { |
137 | struct dso *dso; | |
fd930ff9 FBH |
138 | struct map *map; |
139 | const char *vmlinux_name; | |
469b9b88 MH |
140 | |
141 | if (module) { | |
142 | list_for_each_entry(dso, &machine.kernel_dsos, node) { | |
143 | if (strncmp(dso->short_name + 1, module, | |
144 | dso->short_name_len - 2) == 0) | |
145 | goto found; | |
146 | } | |
147 | pr_debug("Failed to find module %s.\n", module); | |
148 | return NULL; | |
fd930ff9 FBH |
149 | } |
150 | ||
151 | map = machine.vmlinux_maps[MAP__FUNCTION]; | |
152 | dso = map->dso; | |
153 | ||
154 | vmlinux_name = symbol_conf.vmlinux_name; | |
155 | if (vmlinux_name) { | |
156 | if (dso__load_vmlinux(dso, map, vmlinux_name, NULL) <= 0) | |
157 | return NULL; | |
469b9b88 | 158 | } else { |
c3a34e06 | 159 | if (dso__load_vmlinux_path(dso, map, NULL) <= 0) { |
469b9b88 MH |
160 | pr_debug("Failed to load kernel map.\n"); |
161 | return NULL; | |
162 | } | |
163 | } | |
164 | found: | |
e80711ca MH |
165 | return dso; |
166 | } | |
167 | ||
168 | const char *kernel_get_module_path(const char *module) | |
169 | { | |
170 | struct dso *dso = kernel_get_module_dso(module); | |
171 | return (dso) ? dso->long_name : NULL; | |
469b9b88 MH |
172 | } |
173 | ||
4b4da7f7 | 174 | #ifdef DWARF_SUPPORT |
ff741783 MH |
175 | /* Open new debuginfo of given module */ |
176 | static struct debuginfo *open_debuginfo(const char *module) | |
e0faa8d3 | 177 | { |
14a8fd7c | 178 | const char *path; |
ff741783 | 179 | |
14a8fd7c MH |
180 | /* A file path -- this is an offline module */ |
181 | if (module && strchr(module, '/')) | |
182 | path = module; | |
183 | else { | |
184 | path = kernel_get_module_path(module); | |
185 | ||
186 | if (!path) { | |
187 | pr_err("Failed to find path of %s module.\n", | |
188 | module ?: "kernel"); | |
189 | return NULL; | |
190 | } | |
e0faa8d3 | 191 | } |
ff741783 | 192 | return debuginfo__new(path); |
e0faa8d3 | 193 | } |
4b4da7f7 | 194 | |
0e60836b SD |
195 | /* |
196 | * Convert trace point to probe point with debuginfo | |
197 | * Currently only handles kprobes. | |
198 | */ | |
199 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, | |
469b9b88 | 200 | struct perf_probe_point *pp) |
4b4da7f7 MH |
201 | { |
202 | struct symbol *sym; | |
469b9b88 MH |
203 | struct map *map; |
204 | u64 addr; | |
205 | int ret = -ENOENT; | |
ff741783 | 206 | struct debuginfo *dinfo; |
4b4da7f7 | 207 | |
469b9b88 | 208 | sym = __find_kernel_function_by_name(tp->symbol, &map); |
4b4da7f7 | 209 | if (sym) { |
469b9b88 | 210 | addr = map->unmap_ip(map, sym->start + tp->offset); |
9486aa38 | 211 | pr_debug("try to find %s+%ld@%" PRIx64 "\n", tp->symbol, |
469b9b88 | 212 | tp->offset, addr); |
ff741783 MH |
213 | |
214 | dinfo = debuginfo__new_online_kernel(addr); | |
215 | if (dinfo) { | |
216 | ret = debuginfo__find_probe_point(dinfo, | |
217 | (unsigned long)addr, pp); | |
218 | debuginfo__delete(dinfo); | |
219 | } else { | |
220 | pr_debug("Failed to open debuginfo at 0x%" PRIx64 "\n", | |
221 | addr); | |
222 | ret = -ENOENT; | |
223 | } | |
4b4da7f7 MH |
224 | } |
225 | if (ret <= 0) { | |
146a1439 MH |
226 | pr_debug("Failed to find corresponding probes from " |
227 | "debuginfo. Use kprobe event information.\n"); | |
02b95dad MH |
228 | pp->function = strdup(tp->symbol); |
229 | if (pp->function == NULL) | |
230 | return -ENOMEM; | |
4b4da7f7 MH |
231 | pp->offset = tp->offset; |
232 | } | |
233 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
234 | |
235 | return 0; | |
4b4da7f7 MH |
236 | } |
237 | ||
190b57fc MH |
238 | static int add_module_to_probe_trace_events(struct probe_trace_event *tevs, |
239 | int ntevs, const char *module) | |
240 | { | |
14a8fd7c MH |
241 | int i, ret = 0; |
242 | char *tmp; | |
243 | ||
244 | if (!module) | |
245 | return 0; | |
246 | ||
247 | tmp = strrchr(module, '/'); | |
248 | if (tmp) { | |
249 | /* This is a module path -- get the module name */ | |
250 | module = strdup(tmp + 1); | |
251 | if (!module) | |
252 | return -ENOMEM; | |
253 | tmp = strchr(module, '.'); | |
254 | if (tmp) | |
255 | *tmp = '\0'; | |
256 | tmp = (char *)module; /* For free() */ | |
257 | } | |
258 | ||
190b57fc MH |
259 | for (i = 0; i < ntevs; i++) { |
260 | tevs[i].point.module = strdup(module); | |
14a8fd7c MH |
261 | if (!tevs[i].point.module) { |
262 | ret = -ENOMEM; | |
263 | break; | |
264 | } | |
190b57fc | 265 | } |
14a8fd7c MH |
266 | |
267 | if (tmp) | |
268 | free(tmp); | |
269 | ||
270 | return ret; | |
190b57fc MH |
271 | } |
272 | ||
4b4da7f7 | 273 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 274 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
190b57fc MH |
275 | struct probe_trace_event **tevs, |
276 | int max_tevs, const char *module) | |
4b4da7f7 MH |
277 | { |
278 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
ff741783 | 279 | struct debuginfo *dinfo = open_debuginfo(module); |
190b57fc | 280 | int ntevs, ret = 0; |
4b4da7f7 | 281 | |
ff741783 | 282 | if (!dinfo) { |
146a1439 MH |
283 | if (need_dwarf) { |
284 | pr_warning("Failed to open debuginfo file.\n"); | |
ff741783 | 285 | return -ENOENT; |
146a1439 | 286 | } |
ff741783 | 287 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
288 | return 0; |
289 | } | |
290 | ||
ff741783 MH |
291 | /* Searching trace events corresponding to a probe event */ |
292 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs); | |
293 | ||
294 | debuginfo__delete(dinfo); | |
4b4da7f7 | 295 | |
146a1439 | 296 | if (ntevs > 0) { /* Succeeded to find trace events */ |
0e60836b | 297 | pr_debug("find %d probe_trace_events.\n", ntevs); |
190b57fc MH |
298 | if (module) |
299 | ret = add_module_to_probe_trace_events(*tevs, ntevs, | |
300 | module); | |
301 | return ret < 0 ? ret : ntevs; | |
146a1439 | 302 | } |
4b4da7f7 | 303 | |
146a1439 MH |
304 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
305 | pr_warning("Probe point '%s' not found.\n", | |
306 | synthesize_perf_probe_point(&pev->point)); | |
307 | return -ENOENT; | |
308 | } | |
309 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
310 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
311 | if (ntevs == -EBADF) { | |
312 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
313 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
314 | if (!need_dwarf) { | |
0e43e5d2 | 315 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
316 | return 0; |
317 | } | |
4b4da7f7 | 318 | } |
15eca306 | 319 | return ntevs; |
4b4da7f7 MH |
320 | } |
321 | ||
7cf0b79e MH |
322 | /* |
323 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
324 | * and chop off leading directories that do not exist. Result is passed back as | |
325 | * a newly allocated path on success. | |
326 | * Return 0 if file was found and readable, -errno otherwise. | |
327 | */ | |
6a330a3c MH |
328 | static int get_real_path(const char *raw_path, const char *comp_dir, |
329 | char **new_path) | |
7cf0b79e | 330 | { |
6a330a3c MH |
331 | const char *prefix = symbol_conf.source_prefix; |
332 | ||
333 | if (!prefix) { | |
334 | if (raw_path[0] != '/' && comp_dir) | |
335 | /* If not an absolute path, try to use comp_dir */ | |
336 | prefix = comp_dir; | |
337 | else { | |
338 | if (access(raw_path, R_OK) == 0) { | |
339 | *new_path = strdup(raw_path); | |
340 | return 0; | |
341 | } else | |
342 | return -errno; | |
343 | } | |
7cf0b79e MH |
344 | } |
345 | ||
6a330a3c | 346 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
7cf0b79e MH |
347 | if (!*new_path) |
348 | return -ENOMEM; | |
349 | ||
350 | for (;;) { | |
6a330a3c | 351 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
7cf0b79e MH |
352 | |
353 | if (access(*new_path, R_OK) == 0) | |
354 | return 0; | |
355 | ||
6a330a3c MH |
356 | if (!symbol_conf.source_prefix) |
357 | /* In case of searching comp_dir, don't retry */ | |
358 | return -errno; | |
359 | ||
7cf0b79e MH |
360 | switch (errno) { |
361 | case ENAMETOOLONG: | |
362 | case ENOENT: | |
363 | case EROFS: | |
364 | case EFAULT: | |
365 | raw_path = strchr(++raw_path, '/'); | |
366 | if (!raw_path) { | |
367 | free(*new_path); | |
368 | *new_path = NULL; | |
369 | return -ENOENT; | |
370 | } | |
371 | continue; | |
372 | ||
373 | default: | |
374 | free(*new_path); | |
375 | *new_path = NULL; | |
376 | return -errno; | |
377 | } | |
378 | } | |
379 | } | |
380 | ||
4b4da7f7 MH |
381 | #define LINEBUF_SIZE 256 |
382 | #define NR_ADDITIONAL_LINES 2 | |
383 | ||
fde52dbd | 384 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
385 | { |
386 | char buf[LINEBUF_SIZE]; | |
befe3414 FBH |
387 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
388 | const char *prefix = NULL; | |
4b4da7f7 | 389 | |
befe3414 | 390 | do { |
4b4da7f7 MH |
391 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
392 | goto error; | |
befe3414 FBH |
393 | if (skip) |
394 | continue; | |
395 | if (!prefix) { | |
396 | prefix = show_num ? "%7d " : " "; | |
397 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 398 | } |
befe3414 FBH |
399 | color_fprintf(stdout, color, "%s", buf); |
400 | ||
401 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 402 | |
fde52dbd | 403 | return 1; |
4b4da7f7 | 404 | error: |
fde52dbd | 405 | if (ferror(fp)) { |
32b2b6ec | 406 | pr_warning("File read error: %s\n", strerror(errno)); |
fde52dbd FBH |
407 | return -1; |
408 | } | |
409 | return 0; | |
410 | } | |
146a1439 | 411 | |
fde52dbd FBH |
412 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
413 | { | |
414 | int rv = __show_one_line(fp, l, skip, show_num); | |
415 | if (rv == 0) { | |
416 | pr_warning("Source file is shorter than expected.\n"); | |
417 | rv = -1; | |
418 | } | |
419 | return rv; | |
4b4da7f7 MH |
420 | } |
421 | ||
fde52dbd FBH |
422 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
423 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
424 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
425 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
426 | ||
4b4da7f7 MH |
427 | /* |
428 | * Show line-range always requires debuginfo to find source file and | |
429 | * line number. | |
430 | */ | |
469b9b88 | 431 | int show_line_range(struct line_range *lr, const char *module) |
4b4da7f7 | 432 | { |
d3b63d7a | 433 | int l = 1; |
4b4da7f7 | 434 | struct line_node *ln; |
ff741783 | 435 | struct debuginfo *dinfo; |
4b4da7f7 | 436 | FILE *fp; |
ff741783 | 437 | int ret; |
7cf0b79e | 438 | char *tmp; |
4b4da7f7 MH |
439 | |
440 | /* Search a line range */ | |
146a1439 MH |
441 | ret = init_vmlinux(); |
442 | if (ret < 0) | |
443 | return ret; | |
444 | ||
ff741783 MH |
445 | dinfo = open_debuginfo(module); |
446 | if (!dinfo) { | |
146a1439 | 447 | pr_warning("Failed to open debuginfo file.\n"); |
ff741783 | 448 | return -ENOENT; |
146a1439 MH |
449 | } |
450 | ||
ff741783 MH |
451 | ret = debuginfo__find_line_range(dinfo, lr); |
452 | debuginfo__delete(dinfo); | |
146a1439 MH |
453 | if (ret == 0) { |
454 | pr_warning("Specified source line is not found.\n"); | |
455 | return -ENOENT; | |
456 | } else if (ret < 0) { | |
457 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
458 | return ret; | |
459 | } | |
4b4da7f7 | 460 | |
7cf0b79e MH |
461 | /* Convert source file path */ |
462 | tmp = lr->path; | |
6a330a3c | 463 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
7cf0b79e MH |
464 | free(tmp); /* Free old path */ |
465 | if (ret < 0) { | |
466 | pr_warning("Failed to find source file. (%d)\n", ret); | |
467 | return ret; | |
468 | } | |
469 | ||
4b4da7f7 MH |
470 | setup_pager(); |
471 | ||
472 | if (lr->function) | |
8737ebde | 473 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
474 | lr->start - lr->offset); |
475 | else | |
62c15fc4 | 476 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
477 | |
478 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
479 | if (fp == NULL) { |
480 | pr_warning("Failed to open %s: %s\n", lr->path, | |
481 | strerror(errno)); | |
482 | return -errno; | |
483 | } | |
4b4da7f7 | 484 | /* Skip to starting line number */ |
44b81e92 | 485 | while (l < lr->start) { |
fde52dbd | 486 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
487 | if (ret < 0) |
488 | goto end; | |
489 | } | |
4b4da7f7 MH |
490 | |
491 | list_for_each_entry(ln, &lr->line_list, list) { | |
44b81e92 | 492 | for (; ln->line > l; l++) { |
fde52dbd | 493 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
494 | if (ret < 0) |
495 | goto end; | |
496 | } | |
fde52dbd | 497 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
498 | if (ret < 0) |
499 | goto end; | |
4b4da7f7 MH |
500 | } |
501 | ||
502 | if (lr->end == INT_MAX) | |
503 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
504 | while (l <= lr->end) { |
505 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
506 | if (ret <= 0) | |
44b81e92 FBH |
507 | break; |
508 | } | |
146a1439 | 509 | end: |
4b4da7f7 | 510 | fclose(fp); |
146a1439 | 511 | return ret; |
4b4da7f7 MH |
512 | } |
513 | ||
ff741783 MH |
514 | static int show_available_vars_at(struct debuginfo *dinfo, |
515 | struct perf_probe_event *pev, | |
bd09d7b5 MH |
516 | int max_vls, struct strfilter *_filter, |
517 | bool externs) | |
cf6eb489 MH |
518 | { |
519 | char *buf; | |
bd09d7b5 | 520 | int ret, i, nvars; |
cf6eb489 MH |
521 | struct str_node *node; |
522 | struct variable_list *vls = NULL, *vl; | |
bd09d7b5 | 523 | const char *var; |
cf6eb489 MH |
524 | |
525 | buf = synthesize_perf_probe_point(&pev->point); | |
526 | if (!buf) | |
527 | return -EINVAL; | |
528 | pr_debug("Searching variables at %s\n", buf); | |
529 | ||
ff741783 MH |
530 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls, |
531 | max_vls, externs); | |
bd09d7b5 MH |
532 | if (ret <= 0) { |
533 | pr_err("Failed to find variables at %s (%d)\n", buf, ret); | |
534 | goto end; | |
535 | } | |
536 | /* Some variables are found */ | |
537 | fprintf(stdout, "Available variables at %s\n", buf); | |
538 | for (i = 0; i < ret; i++) { | |
539 | vl = &vls[i]; | |
540 | /* | |
541 | * A probe point might be converted to | |
542 | * several trace points. | |
543 | */ | |
544 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
545 | vl->point.offset); | |
546 | free(vl->point.symbol); | |
547 | nvars = 0; | |
548 | if (vl->vars) { | |
549 | strlist__for_each(node, vl->vars) { | |
550 | var = strchr(node->s, '\t') + 1; | |
551 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 552 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
553 | nvars++; |
554 | } | |
555 | } | |
556 | strlist__delete(vl->vars); | |
cf6eb489 | 557 | } |
bd09d7b5 MH |
558 | if (nvars == 0) |
559 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
560 | } | |
561 | free(vls); | |
562 | end: | |
cf6eb489 MH |
563 | free(buf); |
564 | return ret; | |
565 | } | |
566 | ||
567 | /* Show available variables on given probe point */ | |
568 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
bd09d7b5 MH |
569 | int max_vls, const char *module, |
570 | struct strfilter *_filter, bool externs) | |
cf6eb489 | 571 | { |
ff741783 MH |
572 | int i, ret = 0; |
573 | struct debuginfo *dinfo; | |
cf6eb489 MH |
574 | |
575 | ret = init_vmlinux(); | |
576 | if (ret < 0) | |
577 | return ret; | |
578 | ||
ff741783 MH |
579 | dinfo = open_debuginfo(module); |
580 | if (!dinfo) { | |
581 | pr_warning("Failed to open debuginfo file.\n"); | |
582 | return -ENOENT; | |
583 | } | |
584 | ||
cf6eb489 MH |
585 | setup_pager(); |
586 | ||
ff741783 MH |
587 | for (i = 0; i < npevs && ret >= 0; i++) |
588 | ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter, | |
bd09d7b5 | 589 | externs); |
ff741783 MH |
590 | |
591 | debuginfo__delete(dinfo); | |
cf6eb489 MH |
592 | return ret; |
593 | } | |
594 | ||
4b4da7f7 MH |
595 | #else /* !DWARF_SUPPORT */ |
596 | ||
0e60836b | 597 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, |
469b9b88 | 598 | struct perf_probe_point *pp) |
4b4da7f7 | 599 | { |
469b9b88 MH |
600 | struct symbol *sym; |
601 | ||
602 | sym = __find_kernel_function_by_name(tp->symbol, NULL); | |
603 | if (!sym) { | |
604 | pr_err("Failed to find symbol %s in kernel.\n", tp->symbol); | |
605 | return -ENOENT; | |
606 | } | |
02b95dad MH |
607 | pp->function = strdup(tp->symbol); |
608 | if (pp->function == NULL) | |
609 | return -ENOMEM; | |
4b4da7f7 MH |
610 | pp->offset = tp->offset; |
611 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
612 | |
613 | return 0; | |
4b4da7f7 MH |
614 | } |
615 | ||
0e60836b SD |
616 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
617 | struct probe_trace_event **tevs __unused, | |
469b9b88 | 618 | int max_tevs __unused, const char *mod __unused) |
4b4da7f7 | 619 | { |
146a1439 MH |
620 | if (perf_probe_event_need_dwarf(pev)) { |
621 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
622 | return -ENOSYS; | |
623 | } | |
4b4da7f7 MH |
624 | return 0; |
625 | } | |
626 | ||
469b9b88 | 627 | int show_line_range(struct line_range *lr __unused, const char *module __unused) |
4b4da7f7 | 628 | { |
146a1439 MH |
629 | pr_warning("Debuginfo-analysis is not supported.\n"); |
630 | return -ENOSYS; | |
4b4da7f7 MH |
631 | } |
632 | ||
cf6eb489 | 633 | int show_available_vars(struct perf_probe_event *pevs __unused, |
469b9b88 | 634 | int npevs __unused, int max_vls __unused, |
bd09d7b5 MH |
635 | const char *module __unused, |
636 | struct strfilter *filter __unused, | |
637 | bool externs __unused) | |
cf6eb489 MH |
638 | { |
639 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
640 | return -ENOSYS; | |
641 | } | |
e0faa8d3 MH |
642 | #endif |
643 | ||
21dd9ae5 FBH |
644 | static int parse_line_num(char **ptr, int *val, const char *what) |
645 | { | |
646 | const char *start = *ptr; | |
647 | ||
648 | errno = 0; | |
649 | *val = strtol(*ptr, ptr, 0); | |
650 | if (errno || *ptr == start) { | |
651 | semantic_error("'%s' is not a valid number.\n", what); | |
652 | return -EINVAL; | |
653 | } | |
654 | return 0; | |
655 | } | |
656 | ||
9d95b580 FBH |
657 | /* |
658 | * Stuff 'lr' according to the line range described by 'arg'. | |
659 | * The line range syntax is described by: | |
660 | * | |
661 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 662 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 663 | */ |
146a1439 | 664 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 665 | { |
e116dfa1 | 666 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
667 | int err; |
668 | ||
669 | if (!name) | |
670 | return -ENOMEM; | |
671 | ||
672 | lr->start = 0; | |
673 | lr->end = INT_MAX; | |
674 | ||
675 | range = strchr(name, ':'); | |
676 | if (range) { | |
677 | *range++ = '\0'; | |
678 | ||
679 | err = parse_line_num(&range, &lr->start, "start line"); | |
680 | if (err) | |
681 | goto err; | |
682 | ||
683 | if (*range == '+' || *range == '-') { | |
684 | const char c = *range++; | |
685 | ||
686 | err = parse_line_num(&range, &lr->end, "end line"); | |
687 | if (err) | |
688 | goto err; | |
689 | ||
690 | if (c == '+') { | |
691 | lr->end += lr->start; | |
692 | /* | |
693 | * Adjust the number of lines here. | |
694 | * If the number of lines == 1, the | |
695 | * the end of line should be equal to | |
696 | * the start of line. | |
697 | */ | |
698 | lr->end--; | |
699 | } | |
700 | } | |
9d95b580 | 701 | |
d3b63d7a | 702 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
703 | |
704 | err = -EINVAL; | |
d3b63d7a | 705 | if (lr->start > lr->end) { |
631c9def | 706 | semantic_error("Start line must be smaller" |
146a1439 | 707 | " than end line.\n"); |
21dd9ae5 | 708 | goto err; |
146a1439 | 709 | } |
21dd9ae5 FBH |
710 | if (*range != '\0') { |
711 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
712 | goto err; | |
146a1439 | 713 | } |
d3b63d7a | 714 | } |
02b95dad | 715 | |
e116dfa1 MH |
716 | file = strchr(name, '@'); |
717 | if (file) { | |
718 | *file = '\0'; | |
719 | lr->file = strdup(++file); | |
720 | if (lr->file == NULL) { | |
721 | err = -ENOMEM; | |
722 | goto err; | |
723 | } | |
724 | lr->function = name; | |
725 | } else if (strchr(name, '.')) | |
21dd9ae5 | 726 | lr->file = name; |
631c9def | 727 | else |
21dd9ae5 | 728 | lr->function = name; |
146a1439 MH |
729 | |
730 | return 0; | |
21dd9ae5 FBH |
731 | err: |
732 | free(name); | |
733 | return err; | |
631c9def MH |
734 | } |
735 | ||
b7702a21 MH |
736 | /* Check the name is good for event/group */ |
737 | static bool check_event_name(const char *name) | |
738 | { | |
739 | if (!isalpha(*name) && *name != '_') | |
740 | return false; | |
741 | while (*++name != '\0') { | |
742 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
743 | return false; | |
744 | } | |
745 | return true; | |
746 | } | |
747 | ||
50656eec | 748 | /* Parse probepoint definition. */ |
146a1439 | 749 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 750 | { |
4235b045 | 751 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
752 | char *ptr, *tmp; |
753 | char c, nc = 0; | |
754 | /* | |
755 | * <Syntax> | |
2a9c8c36 MH |
756 | * perf probe [EVENT=]SRC[:LN|;PTN] |
757 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
758 | * |
759 | * TODO:Group name support | |
50656eec MH |
760 | */ |
761 | ||
2a9c8c36 MH |
762 | ptr = strpbrk(arg, ";=@+%"); |
763 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
764 | *ptr = '\0'; |
765 | tmp = ptr + 1; | |
146a1439 MH |
766 | if (strchr(arg, ':')) { |
767 | semantic_error("Group name is not supported yet.\n"); | |
768 | return -ENOTSUP; | |
769 | } | |
770 | if (!check_event_name(arg)) { | |
b7702a21 | 771 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
772 | "follow C symbol-naming rule.\n", arg); |
773 | return -EINVAL; | |
774 | } | |
02b95dad MH |
775 | pev->event = strdup(arg); |
776 | if (pev->event == NULL) | |
777 | return -ENOMEM; | |
4235b045 | 778 | pev->group = NULL; |
af663d75 MH |
779 | arg = tmp; |
780 | } | |
781 | ||
2a9c8c36 | 782 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
783 | if (ptr) { |
784 | nc = *ptr; | |
785 | *ptr++ = '\0'; | |
786 | } | |
787 | ||
02b95dad MH |
788 | tmp = strdup(arg); |
789 | if (tmp == NULL) | |
790 | return -ENOMEM; | |
791 | ||
50656eec | 792 | /* Check arg is function or file and copy it */ |
02b95dad MH |
793 | if (strchr(tmp, '.')) /* File */ |
794 | pp->file = tmp; | |
50656eec | 795 | else /* Function */ |
02b95dad | 796 | pp->function = tmp; |
50656eec MH |
797 | |
798 | /* Parse other options */ | |
799 | while (ptr) { | |
800 | arg = ptr; | |
801 | c = nc; | |
2a9c8c36 | 802 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
803 | pp->lazy_line = strdup(arg); |
804 | if (pp->lazy_line == NULL) | |
805 | return -ENOMEM; | |
2a9c8c36 MH |
806 | break; |
807 | } | |
808 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
809 | if (ptr) { |
810 | nc = *ptr; | |
811 | *ptr++ = '\0'; | |
812 | } | |
813 | switch (c) { | |
814 | case ':': /* Line number */ | |
815 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 816 | if (*tmp != '\0') { |
2a9c8c36 | 817 | semantic_error("There is non-digit char" |
146a1439 MH |
818 | " in line number.\n"); |
819 | return -EINVAL; | |
820 | } | |
50656eec MH |
821 | break; |
822 | case '+': /* Byte offset from a symbol */ | |
823 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 824 | if (*tmp != '\0') { |
2a9c8c36 | 825 | semantic_error("There is non-digit character" |
146a1439 MH |
826 | " in offset.\n"); |
827 | return -EINVAL; | |
828 | } | |
50656eec MH |
829 | break; |
830 | case '@': /* File name */ | |
146a1439 MH |
831 | if (pp->file) { |
832 | semantic_error("SRC@SRC is not allowed.\n"); | |
833 | return -EINVAL; | |
834 | } | |
02b95dad MH |
835 | pp->file = strdup(arg); |
836 | if (pp->file == NULL) | |
837 | return -ENOMEM; | |
50656eec MH |
838 | break; |
839 | case '%': /* Probe places */ | |
840 | if (strcmp(arg, "return") == 0) { | |
841 | pp->retprobe = 1; | |
146a1439 MH |
842 | } else { /* Others not supported yet */ |
843 | semantic_error("%%%s is not supported.\n", arg); | |
844 | return -ENOTSUP; | |
845 | } | |
50656eec | 846 | break; |
146a1439 MH |
847 | default: /* Buggy case */ |
848 | pr_err("This program has a bug at %s:%d.\n", | |
849 | __FILE__, __LINE__); | |
850 | return -ENOTSUP; | |
50656eec MH |
851 | break; |
852 | } | |
853 | } | |
854 | ||
855 | /* Exclusion check */ | |
146a1439 | 856 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
857 | semantic_error("Lazy pattern can't be used with" |
858 | " line number.\n"); | |
146a1439 MH |
859 | return -EINVAL; |
860 | } | |
2a9c8c36 | 861 | |
146a1439 | 862 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 863 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
864 | return -EINVAL; |
865 | } | |
2a9c8c36 | 866 | |
146a1439 | 867 | if (pp->line && pp->offset) { |
0e43e5d2 | 868 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
869 | return -EINVAL; |
870 | } | |
50656eec | 871 | |
146a1439 | 872 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 873 | semantic_error("File always requires line number or " |
0e43e5d2 | 874 | "lazy pattern.\n"); |
146a1439 MH |
875 | return -EINVAL; |
876 | } | |
50656eec | 877 | |
146a1439 | 878 | if (pp->offset && !pp->function) { |
0e43e5d2 | 879 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
880 | return -EINVAL; |
881 | } | |
50656eec | 882 | |
146a1439 | 883 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 884 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
885 | return -EINVAL; |
886 | } | |
50656eec | 887 | |
146a1439 | 888 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 889 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 890 | "return probe.\n"); |
146a1439 MH |
891 | return -EINVAL; |
892 | } | |
50656eec | 893 | |
4235b045 | 894 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
895 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
896 | pp->lazy_line); | |
146a1439 | 897 | return 0; |
50656eec MH |
898 | } |
899 | ||
7df2f329 | 900 | /* Parse perf-probe event argument */ |
146a1439 | 901 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 902 | { |
b2a3c12b | 903 | char *tmp, *goodname; |
7df2f329 MH |
904 | struct perf_probe_arg_field **fieldp; |
905 | ||
906 | pr_debug("parsing arg: %s into ", str); | |
907 | ||
48481938 MH |
908 | tmp = strchr(str, '='); |
909 | if (tmp) { | |
02b95dad MH |
910 | arg->name = strndup(str, tmp - str); |
911 | if (arg->name == NULL) | |
912 | return -ENOMEM; | |
11a1ca35 | 913 | pr_debug("name:%s ", arg->name); |
48481938 MH |
914 | str = tmp + 1; |
915 | } | |
916 | ||
11a1ca35 MH |
917 | tmp = strchr(str, ':'); |
918 | if (tmp) { /* Type setting */ | |
919 | *tmp = '\0'; | |
02b95dad MH |
920 | arg->type = strdup(tmp + 1); |
921 | if (arg->type == NULL) | |
922 | return -ENOMEM; | |
11a1ca35 MH |
923 | pr_debug("type:%s ", arg->type); |
924 | } | |
925 | ||
b2a3c12b | 926 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
927 | if (!is_c_varname(str) || !tmp) { |
928 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
929 | arg->var = strdup(str); |
930 | if (arg->var == NULL) | |
931 | return -ENOMEM; | |
48481938 | 932 | pr_debug("%s\n", arg->var); |
146a1439 | 933 | return 0; |
7df2f329 MH |
934 | } |
935 | ||
b2a3c12b | 936 | /* Structure fields or array element */ |
02b95dad MH |
937 | arg->var = strndup(str, tmp - str); |
938 | if (arg->var == NULL) | |
939 | return -ENOMEM; | |
b2a3c12b | 940 | goodname = arg->var; |
48481938 | 941 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
942 | fieldp = &arg->field; |
943 | ||
944 | do { | |
e334016f MH |
945 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
946 | if (*fieldp == NULL) | |
947 | return -ENOMEM; | |
b2a3c12b MH |
948 | if (*tmp == '[') { /* Array */ |
949 | str = tmp; | |
950 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 951 | (*fieldp)->ref = true; |
b2a3c12b MH |
952 | if (*tmp != ']' || tmp == str + 1) { |
953 | semantic_error("Array index must be a" | |
954 | " number.\n"); | |
955 | return -EINVAL; | |
956 | } | |
957 | tmp++; | |
958 | if (*tmp == '\0') | |
959 | tmp = NULL; | |
960 | } else { /* Structure */ | |
961 | if (*tmp == '.') { | |
962 | str = tmp + 1; | |
963 | (*fieldp)->ref = false; | |
964 | } else if (tmp[1] == '>') { | |
965 | str = tmp + 2; | |
966 | (*fieldp)->ref = true; | |
967 | } else { | |
968 | semantic_error("Argument parse error: %s\n", | |
969 | str); | |
970 | return -EINVAL; | |
971 | } | |
972 | tmp = strpbrk(str, "-.["); | |
146a1439 | 973 | } |
7df2f329 | 974 | if (tmp) { |
02b95dad MH |
975 | (*fieldp)->name = strndup(str, tmp - str); |
976 | if ((*fieldp)->name == NULL) | |
977 | return -ENOMEM; | |
b2a3c12b MH |
978 | if (*str != '[') |
979 | goodname = (*fieldp)->name; | |
7df2f329 MH |
980 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
981 | fieldp = &(*fieldp)->next; | |
982 | } | |
983 | } while (tmp); | |
02b95dad MH |
984 | (*fieldp)->name = strdup(str); |
985 | if ((*fieldp)->name == NULL) | |
986 | return -ENOMEM; | |
b2a3c12b MH |
987 | if (*str != '[') |
988 | goodname = (*fieldp)->name; | |
7df2f329 | 989 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 990 | |
b2a3c12b | 991 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 992 | if (!arg->name) { |
b2a3c12b | 993 | arg->name = strdup(goodname); |
02b95dad MH |
994 | if (arg->name == NULL) |
995 | return -ENOMEM; | |
996 | } | |
146a1439 | 997 | return 0; |
7df2f329 MH |
998 | } |
999 | ||
4235b045 | 1000 | /* Parse perf-probe event command */ |
146a1439 | 1001 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1002 | { |
e1c01d61 | 1003 | char **argv; |
146a1439 | 1004 | int argc, i, ret = 0; |
fac13fd5 | 1005 | |
4235b045 | 1006 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1007 | if (!argv) { |
1008 | pr_debug("Failed to split arguments.\n"); | |
1009 | return -ENOMEM; | |
1010 | } | |
1011 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1012 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1013 | ret = -ERANGE; | |
1014 | goto out; | |
1015 | } | |
50656eec | 1016 | /* Parse probe point */ |
146a1439 MH |
1017 | ret = parse_perf_probe_point(argv[0], pev); |
1018 | if (ret < 0) | |
1019 | goto out; | |
50656eec | 1020 | |
e1c01d61 | 1021 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1022 | pev->nargs = argc - 1; |
e334016f MH |
1023 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1024 | if (pev->args == NULL) { | |
1025 | ret = -ENOMEM; | |
1026 | goto out; | |
1027 | } | |
146a1439 MH |
1028 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1029 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1030 | if (ret >= 0 && | |
1031 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1032 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1033 | " kretprobe.\n"); |
1034 | ret = -EINVAL; | |
1035 | } | |
e1c01d61 | 1036 | } |
146a1439 | 1037 | out: |
e1c01d61 | 1038 | argv_free(argv); |
146a1439 MH |
1039 | |
1040 | return ret; | |
50656eec MH |
1041 | } |
1042 | ||
4235b045 MH |
1043 | /* Return true if this perf_probe_event requires debuginfo */ |
1044 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1045 | { | |
1046 | int i; | |
1047 | ||
1048 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
1049 | return true; | |
1050 | ||
1051 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 1052 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
1053 | return true; |
1054 | ||
1055 | return false; | |
1056 | } | |
1057 | ||
0e60836b SD |
1058 | /* Parse probe_events event into struct probe_point */ |
1059 | static int parse_probe_trace_command(const char *cmd, | |
190b57fc | 1060 | struct probe_trace_event *tev) |
4de189fe | 1061 | { |
0e60836b | 1062 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1063 | char pr; |
1064 | char *p; | |
1065 | int ret, i, argc; | |
1066 | char **argv; | |
1067 | ||
0e60836b | 1068 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1069 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1070 | if (!argv) { |
1071 | pr_debug("Failed to split arguments.\n"); | |
1072 | return -ENOMEM; | |
1073 | } | |
1074 | if (argc < 2) { | |
1075 | semantic_error("Too few probe arguments.\n"); | |
1076 | ret = -ERANGE; | |
1077 | goto out; | |
1078 | } | |
4de189fe MH |
1079 | |
1080 | /* Scan event and group name. */ | |
93aaa45a | 1081 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
1082 | &pr, (float *)(void *)&tev->group, |
1083 | (float *)(void *)&tev->event); | |
146a1439 MH |
1084 | if (ret != 3) { |
1085 | semantic_error("Failed to parse event name: %s\n", argv[0]); | |
1086 | ret = -EINVAL; | |
1087 | goto out; | |
1088 | } | |
4235b045 | 1089 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1090 | |
4235b045 | 1091 | tp->retprobe = (pr == 'r'); |
4de189fe | 1092 | |
190b57fc MH |
1093 | /* Scan module name(if there), function name and offset */ |
1094 | p = strchr(argv[1], ':'); | |
1095 | if (p) { | |
1096 | tp->module = strndup(argv[1], p - argv[1]); | |
1097 | p++; | |
1098 | } else | |
1099 | p = argv[1]; | |
1100 | ret = sscanf(p, "%a[^+]+%lu", (float *)(void *)&tp->symbol, | |
4235b045 | 1101 | &tp->offset); |
4de189fe | 1102 | if (ret == 1) |
4235b045 | 1103 | tp->offset = 0; |
4de189fe | 1104 | |
4235b045 | 1105 | tev->nargs = argc - 2; |
0e60836b | 1106 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1107 | if (tev->args == NULL) { |
1108 | ret = -ENOMEM; | |
1109 | goto out; | |
1110 | } | |
4235b045 | 1111 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1112 | p = strchr(argv[i + 2], '='); |
1113 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1114 | *p++ = '\0'; |
1115 | else | |
1116 | p = argv[i + 2]; | |
02b95dad | 1117 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1118 | /* TODO: parse regs and offset */ |
02b95dad MH |
1119 | tev->args[i].value = strdup(p); |
1120 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1121 | ret = -ENOMEM; | |
1122 | goto out; | |
1123 | } | |
4de189fe | 1124 | } |
146a1439 MH |
1125 | ret = 0; |
1126 | out: | |
4de189fe | 1127 | argv_free(argv); |
146a1439 | 1128 | return ret; |
4de189fe MH |
1129 | } |
1130 | ||
7df2f329 MH |
1131 | /* Compose only probe arg */ |
1132 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
1133 | { | |
1134 | struct perf_probe_arg_field *field = pa->field; | |
1135 | int ret; | |
1136 | char *tmp = buf; | |
1137 | ||
48481938 MH |
1138 | if (pa->name && pa->var) |
1139 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
1140 | else | |
1141 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
1142 | if (ret <= 0) |
1143 | goto error; | |
1144 | tmp += ret; | |
1145 | len -= ret; | |
1146 | ||
1147 | while (field) { | |
b2a3c12b MH |
1148 | if (field->name[0] == '[') |
1149 | ret = e_snprintf(tmp, len, "%s", field->name); | |
1150 | else | |
1151 | ret = e_snprintf(tmp, len, "%s%s", | |
1152 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
1153 | if (ret <= 0) |
1154 | goto error; | |
1155 | tmp += ret; | |
1156 | len -= ret; | |
1157 | field = field->next; | |
1158 | } | |
11a1ca35 MH |
1159 | |
1160 | if (pa->type) { | |
1161 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
1162 | if (ret <= 0) | |
1163 | goto error; | |
1164 | tmp += ret; | |
1165 | len -= ret; | |
1166 | } | |
1167 | ||
7df2f329 MH |
1168 | return tmp - buf; |
1169 | error: | |
0e43e5d2 | 1170 | pr_debug("Failed to synthesize perf probe argument: %s\n", |
146a1439 MH |
1171 | strerror(-ret)); |
1172 | return ret; | |
7df2f329 MH |
1173 | } |
1174 | ||
4235b045 MH |
1175 | /* Compose only probe point (not argument) */ |
1176 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1177 | { |
fb1587d8 MH |
1178 | char *buf, *tmp; |
1179 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1180 | int ret, len; | |
4de189fe | 1181 | |
e334016f MH |
1182 | buf = zalloc(MAX_CMDLEN); |
1183 | if (buf == NULL) { | |
1184 | ret = -ENOMEM; | |
1185 | goto error; | |
1186 | } | |
4de189fe | 1187 | if (pp->offset) { |
fb1587d8 | 1188 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1189 | if (ret <= 0) |
1190 | goto error; | |
1191 | } | |
1192 | if (pp->line) { | |
fb1587d8 MH |
1193 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1194 | if (ret <= 0) | |
1195 | goto error; | |
1196 | } | |
1197 | if (pp->file) { | |
32ae2ade FBH |
1198 | tmp = pp->file; |
1199 | len = strlen(tmp); | |
1200 | if (len > 30) { | |
1201 | tmp = strchr(pp->file + len - 30, '/'); | |
1202 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1203 | } | |
1204 | ret = e_snprintf(file, 32, "@%s", tmp); | |
4de189fe MH |
1205 | if (ret <= 0) |
1206 | goto error; | |
1207 | } | |
1208 | ||
1209 | if (pp->function) | |
fb1587d8 MH |
1210 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1211 | offs, pp->retprobe ? "%return" : "", line, | |
1212 | file); | |
4de189fe | 1213 | else |
fb1587d8 | 1214 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1215 | if (ret <= 0) |
1216 | goto error; | |
1217 | ||
1218 | return buf; | |
7ef17aaf | 1219 | error: |
0e43e5d2 | 1220 | pr_debug("Failed to synthesize perf probe point: %s\n", |
146a1439 | 1221 | strerror(-ret)); |
e334016f MH |
1222 | if (buf) |
1223 | free(buf); | |
146a1439 | 1224 | return NULL; |
7ef17aaf MH |
1225 | } |
1226 | ||
4235b045 MH |
1227 | #if 0 |
1228 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1229 | { |
1230 | char *buf; | |
1231 | int i, len, ret; | |
1232 | ||
4235b045 MH |
1233 | buf = synthesize_perf_probe_point(&pev->point); |
1234 | if (!buf) | |
1235 | return NULL; | |
4de189fe | 1236 | |
4235b045 MH |
1237 | len = strlen(buf); |
1238 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1239 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1240 | pev->args[i].name); |
1241 | if (ret <= 0) { | |
1242 | free(buf); | |
1243 | return NULL; | |
1244 | } | |
4de189fe MH |
1245 | len += ret; |
1246 | } | |
4de189fe | 1247 | |
4235b045 MH |
1248 | return buf; |
1249 | } | |
1250 | #endif | |
1251 | ||
0e60836b | 1252 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1253 | char **buf, size_t *buflen, |
1254 | int depth) | |
1255 | { | |
1256 | int ret; | |
1257 | if (ref->next) { | |
0e60836b | 1258 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1259 | buflen, depth + 1); |
1260 | if (depth < 0) | |
1261 | goto out; | |
1262 | } | |
1263 | ||
1264 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1265 | if (ret < 0) | |
1266 | depth = ret; | |
1267 | else { | |
1268 | *buf += ret; | |
1269 | *buflen -= ret; | |
1270 | } | |
1271 | out: | |
1272 | return depth; | |
4de189fe | 1273 | |
4de189fe MH |
1274 | } |
1275 | ||
0e60836b | 1276 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1277 | char *buf, size_t buflen) |
50656eec | 1278 | { |
0e60836b | 1279 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1280 | int ret, depth = 0; |
1281 | char *tmp = buf; | |
1282 | ||
1283 | /* Argument name or separator */ | |
1284 | if (arg->name) | |
1285 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1286 | else | |
1287 | ret = e_snprintf(buf, buflen, " "); | |
1288 | if (ret < 0) | |
1289 | return ret; | |
1290 | buf += ret; | |
1291 | buflen -= ret; | |
1292 | ||
b7dcb857 MH |
1293 | /* Special case: @XXX */ |
1294 | if (arg->value[0] == '@' && arg->ref) | |
1295 | ref = ref->next; | |
1296 | ||
4235b045 | 1297 | /* Dereferencing arguments */ |
b7dcb857 | 1298 | if (ref) { |
0e60836b | 1299 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1300 | &buflen, 1); |
1301 | if (depth < 0) | |
1302 | return depth; | |
1303 | } | |
1304 | ||
1305 | /* Print argument value */ | |
b7dcb857 MH |
1306 | if (arg->value[0] == '@' && arg->ref) |
1307 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1308 | arg->ref->offset); | |
1309 | else | |
1310 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1311 | if (ret < 0) |
1312 | return ret; | |
1313 | buf += ret; | |
1314 | buflen -= ret; | |
1315 | ||
1316 | /* Closing */ | |
1317 | while (depth--) { | |
1318 | ret = e_snprintf(buf, buflen, ")"); | |
1319 | if (ret < 0) | |
1320 | return ret; | |
1321 | buf += ret; | |
1322 | buflen -= ret; | |
1323 | } | |
4984912e MH |
1324 | /* Print argument type */ |
1325 | if (arg->type) { | |
1326 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1327 | if (ret <= 0) | |
1328 | return ret; | |
1329 | buf += ret; | |
1330 | } | |
4235b045 MH |
1331 | |
1332 | return buf - tmp; | |
1333 | } | |
1334 | ||
0e60836b | 1335 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1336 | { |
0e60836b | 1337 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1338 | char *buf; |
1339 | int i, len, ret; | |
1340 | ||
e334016f MH |
1341 | buf = zalloc(MAX_CMDLEN); |
1342 | if (buf == NULL) | |
1343 | return NULL; | |
1344 | ||
190b57fc | 1345 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s%s%s+%lu", |
4235b045 MH |
1346 | tp->retprobe ? 'r' : 'p', |
1347 | tev->group, tev->event, | |
190b57fc | 1348 | tp->module ?: "", tp->module ? ":" : "", |
4235b045 MH |
1349 | tp->symbol, tp->offset); |
1350 | if (len <= 0) | |
50656eec | 1351 | goto error; |
50656eec | 1352 | |
4235b045 | 1353 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1354 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1355 | MAX_CMDLEN - len); |
4de189fe | 1356 | if (ret <= 0) |
50656eec MH |
1357 | goto error; |
1358 | len += ret; | |
1359 | } | |
50656eec | 1360 | |
4235b045 | 1361 | return buf; |
50656eec | 1362 | error: |
4235b045 MH |
1363 | free(buf); |
1364 | return NULL; | |
1365 | } | |
50656eec | 1366 | |
0e60836b | 1367 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
469b9b88 | 1368 | struct perf_probe_event *pev) |
4235b045 | 1369 | { |
02b95dad | 1370 | char buf[64] = ""; |
146a1439 | 1371 | int i, ret; |
4235b045 | 1372 | |
4b4da7f7 | 1373 | /* Convert event/group name */ |
02b95dad MH |
1374 | pev->event = strdup(tev->event); |
1375 | pev->group = strdup(tev->group); | |
1376 | if (pev->event == NULL || pev->group == NULL) | |
1377 | return -ENOMEM; | |
fb1587d8 | 1378 | |
4b4da7f7 | 1379 | /* Convert trace_point to probe_point */ |
0e60836b | 1380 | ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); |
146a1439 MH |
1381 | if (ret < 0) |
1382 | return ret; | |
4b4da7f7 | 1383 | |
4235b045 MH |
1384 | /* Convert trace_arg to probe_arg */ |
1385 | pev->nargs = tev->nargs; | |
e334016f MH |
1386 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1387 | if (pev->args == NULL) | |
1388 | return -ENOMEM; | |
02b95dad | 1389 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1390 | if (tev->args[i].name) |
02b95dad | 1391 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1392 | else { |
0e60836b | 1393 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1394 | buf, 64); |
02b95dad | 1395 | pev->args[i].name = strdup(buf); |
4235b045 | 1396 | } |
02b95dad MH |
1397 | if (pev->args[i].name == NULL && ret >= 0) |
1398 | ret = -ENOMEM; | |
1399 | } | |
146a1439 MH |
1400 | |
1401 | if (ret < 0) | |
1402 | clear_perf_probe_event(pev); | |
1403 | ||
1404 | return ret; | |
4235b045 MH |
1405 | } |
1406 | ||
1407 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1408 | { | |
1409 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1410 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1411 | int i; |
1412 | ||
1413 | if (pev->event) | |
1414 | free(pev->event); | |
1415 | if (pev->group) | |
1416 | free(pev->group); | |
1417 | if (pp->file) | |
1418 | free(pp->file); | |
1419 | if (pp->function) | |
1420 | free(pp->function); | |
1421 | if (pp->lazy_line) | |
1422 | free(pp->lazy_line); | |
7df2f329 | 1423 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1424 | if (pev->args[i].name) |
1425 | free(pev->args[i].name); | |
48481938 MH |
1426 | if (pev->args[i].var) |
1427 | free(pev->args[i].var); | |
11a1ca35 MH |
1428 | if (pev->args[i].type) |
1429 | free(pev->args[i].type); | |
7df2f329 MH |
1430 | field = pev->args[i].field; |
1431 | while (field) { | |
1432 | next = field->next; | |
1433 | if (field->name) | |
1434 | free(field->name); | |
1435 | free(field); | |
1436 | field = next; | |
1437 | } | |
1438 | } | |
4235b045 MH |
1439 | if (pev->args) |
1440 | free(pev->args); | |
1441 | memset(pev, 0, sizeof(*pev)); | |
1442 | } | |
1443 | ||
0e60836b | 1444 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1445 | { |
0e60836b | 1446 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1447 | int i; |
1448 | ||
1449 | if (tev->event) | |
1450 | free(tev->event); | |
1451 | if (tev->group) | |
1452 | free(tev->group); | |
1453 | if (tev->point.symbol) | |
1454 | free(tev->point.symbol); | |
190b57fc MH |
1455 | if (tev->point.module) |
1456 | free(tev->point.module); | |
4235b045 MH |
1457 | for (i = 0; i < tev->nargs; i++) { |
1458 | if (tev->args[i].name) | |
1459 | free(tev->args[i].name); | |
1460 | if (tev->args[i].value) | |
1461 | free(tev->args[i].value); | |
4984912e MH |
1462 | if (tev->args[i].type) |
1463 | free(tev->args[i].type); | |
4235b045 MH |
1464 | ref = tev->args[i].ref; |
1465 | while (ref) { | |
1466 | next = ref->next; | |
1467 | free(ref); | |
1468 | ref = next; | |
1469 | } | |
1470 | } | |
1471 | if (tev->args) | |
1472 | free(tev->args); | |
1473 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1474 | } |
1475 | ||
f4d7da49 | 1476 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
1477 | { |
1478 | char buf[PATH_MAX]; | |
7ca5989d | 1479 | const char *__debugfs; |
4de189fe MH |
1480 | int ret; |
1481 | ||
7ca5989d MH |
1482 | __debugfs = debugfs_find_mountpoint(); |
1483 | if (__debugfs == NULL) { | |
1484 | pr_warning("Debugfs is not mounted.\n"); | |
1485 | return -ENOENT; | |
1486 | } | |
1487 | ||
1488 | ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); | |
146a1439 | 1489 | if (ret >= 0) { |
7ca5989d | 1490 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1491 | if (readwrite && !probe_event_dry_run) |
1492 | ret = open(buf, O_RDWR, O_APPEND); | |
1493 | else | |
1494 | ret = open(buf, O_RDONLY, 0); | |
1495 | } | |
f4d7da49 | 1496 | |
4de189fe MH |
1497 | if (ret < 0) { |
1498 | if (errno == ENOENT) | |
146a1439 MH |
1499 | pr_warning("kprobe_events file does not exist - please" |
1500 | " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); | |
4de189fe | 1501 | else |
146a1439 MH |
1502 | pr_warning("Failed to open kprobe_events file: %s\n", |
1503 | strerror(errno)); | |
4de189fe MH |
1504 | } |
1505 | return ret; | |
1506 | } | |
1507 | ||
1508 | /* Get raw string list of current kprobe_events */ | |
0e60836b | 1509 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1510 | { |
1511 | int ret, idx; | |
1512 | FILE *fp; | |
1513 | char buf[MAX_CMDLEN]; | |
1514 | char *p; | |
1515 | struct strlist *sl; | |
1516 | ||
1517 | sl = strlist__new(true, NULL); | |
1518 | ||
1519 | fp = fdopen(dup(fd), "r"); | |
1520 | while (!feof(fp)) { | |
1521 | p = fgets(buf, MAX_CMDLEN, fp); | |
1522 | if (!p) | |
1523 | break; | |
1524 | ||
1525 | idx = strlen(p) - 1; | |
1526 | if (p[idx] == '\n') | |
1527 | p[idx] = '\0'; | |
1528 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1529 | if (ret < 0) { |
1530 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1531 | strlist__delete(sl); | |
1532 | return NULL; | |
1533 | } | |
4de189fe MH |
1534 | } |
1535 | fclose(fp); | |
1536 | ||
1537 | return sl; | |
1538 | } | |
1539 | ||
278498d4 | 1540 | /* Show an event */ |
146a1439 | 1541 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1542 | { |
7e990a51 | 1543 | int i, ret; |
278498d4 | 1544 | char buf[128]; |
4235b045 | 1545 | char *place; |
278498d4 | 1546 | |
4235b045 MH |
1547 | /* Synthesize only event probe point */ |
1548 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1549 | if (!place) |
1550 | return -EINVAL; | |
4235b045 MH |
1551 | |
1552 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1553 | if (ret < 0) |
146a1439 MH |
1554 | return ret; |
1555 | ||
fb1587d8 | 1556 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1557 | |
4235b045 | 1558 | if (pev->nargs > 0) { |
278498d4 | 1559 | printf(" with"); |
7df2f329 | 1560 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1561 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1562 | buf, 128); | |
1563 | if (ret < 0) | |
1564 | break; | |
7df2f329 MH |
1565 | printf(" %s", buf); |
1566 | } | |
278498d4 MH |
1567 | } |
1568 | printf(")\n"); | |
4235b045 | 1569 | free(place); |
146a1439 | 1570 | return ret; |
278498d4 MH |
1571 | } |
1572 | ||
4de189fe | 1573 | /* List up current perf-probe events */ |
146a1439 | 1574 | int show_perf_probe_events(void) |
4de189fe | 1575 | { |
146a1439 | 1576 | int fd, ret; |
0e60836b | 1577 | struct probe_trace_event tev; |
4235b045 | 1578 | struct perf_probe_event pev; |
4de189fe MH |
1579 | struct strlist *rawlist; |
1580 | struct str_node *ent; | |
1581 | ||
72041334 | 1582 | setup_pager(); |
146a1439 MH |
1583 | ret = init_vmlinux(); |
1584 | if (ret < 0) | |
1585 | return ret; | |
4235b045 MH |
1586 | |
1587 | memset(&tev, 0, sizeof(tev)); | |
1588 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1589 | |
f4d7da49 | 1590 | fd = open_kprobe_events(false); |
146a1439 MH |
1591 | if (fd < 0) |
1592 | return fd; | |
1593 | ||
0e60836b | 1594 | rawlist = get_probe_trace_command_rawlist(fd); |
4de189fe | 1595 | close(fd); |
146a1439 MH |
1596 | if (!rawlist) |
1597 | return -ENOENT; | |
4de189fe | 1598 | |
adf365f4 | 1599 | strlist__for_each(ent, rawlist) { |
0e60836b | 1600 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1601 | if (ret >= 0) { |
1602 | ret = convert_to_perf_probe_event(&tev, &pev); | |
1603 | if (ret >= 0) | |
1604 | ret = show_perf_probe_event(&pev); | |
1605 | } | |
4235b045 | 1606 | clear_perf_probe_event(&pev); |
0e60836b | 1607 | clear_probe_trace_event(&tev); |
146a1439 MH |
1608 | if (ret < 0) |
1609 | break; | |
4de189fe | 1610 | } |
4de189fe | 1611 | strlist__delete(rawlist); |
146a1439 MH |
1612 | |
1613 | return ret; | |
4de189fe MH |
1614 | } |
1615 | ||
b498ce1f | 1616 | /* Get current perf-probe event names */ |
0e60836b | 1617 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1618 | { |
fa28244d | 1619 | char buf[128]; |
b498ce1f MH |
1620 | struct strlist *sl, *rawlist; |
1621 | struct str_node *ent; | |
0e60836b | 1622 | struct probe_trace_event tev; |
146a1439 | 1623 | int ret = 0; |
b498ce1f | 1624 | |
4235b045 | 1625 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 1626 | rawlist = get_probe_trace_command_rawlist(fd); |
e1d2017b | 1627 | sl = strlist__new(true, NULL); |
adf365f4 | 1628 | strlist__for_each(ent, rawlist) { |
0e60836b | 1629 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1630 | if (ret < 0) |
1631 | break; | |
fa28244d | 1632 | if (include_group) { |
146a1439 MH |
1633 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1634 | tev.event); | |
1635 | if (ret >= 0) | |
1636 | ret = strlist__add(sl, buf); | |
fa28244d | 1637 | } else |
146a1439 | 1638 | ret = strlist__add(sl, tev.event); |
0e60836b | 1639 | clear_probe_trace_event(&tev); |
146a1439 MH |
1640 | if (ret < 0) |
1641 | break; | |
b498ce1f | 1642 | } |
b498ce1f MH |
1643 | strlist__delete(rawlist); |
1644 | ||
146a1439 MH |
1645 | if (ret < 0) { |
1646 | strlist__delete(sl); | |
1647 | return NULL; | |
1648 | } | |
b498ce1f MH |
1649 | return sl; |
1650 | } | |
1651 | ||
0e60836b | 1652 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 1653 | { |
6eca8cc3 | 1654 | int ret = 0; |
0e60836b | 1655 | char *buf = synthesize_probe_trace_command(tev); |
50656eec | 1656 | |
146a1439 | 1657 | if (!buf) { |
0e60836b | 1658 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
1659 | return -EINVAL; |
1660 | } | |
1661 | ||
fa28244d | 1662 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1663 | if (!probe_event_dry_run) { |
1664 | ret = write(fd, buf, strlen(buf)); | |
1665 | if (ret <= 0) | |
146a1439 MH |
1666 | pr_warning("Failed to write event: %s\n", |
1667 | strerror(errno)); | |
f4d7da49 | 1668 | } |
4235b045 | 1669 | free(buf); |
146a1439 | 1670 | return ret; |
50656eec MH |
1671 | } |
1672 | ||
146a1439 MH |
1673 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1674 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1675 | { |
1676 | int i, ret; | |
17f88fcd MH |
1677 | |
1678 | /* Try no suffix */ | |
1679 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1680 | if (ret < 0) { |
1681 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1682 | return ret; | |
1683 | } | |
17f88fcd | 1684 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1685 | return 0; |
17f88fcd | 1686 | |
d761b08b MH |
1687 | if (!allow_suffix) { |
1688 | pr_warning("Error: event \"%s\" already exists. " | |
1689 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1690 | return -EEXIST; |
d761b08b MH |
1691 | } |
1692 | ||
17f88fcd MH |
1693 | /* Try to add suffix */ |
1694 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1695 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1696 | if (ret < 0) { |
1697 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1698 | return ret; | |
1699 | } | |
b498ce1f MH |
1700 | if (!strlist__has_entry(namelist, buf)) |
1701 | break; | |
1702 | } | |
146a1439 MH |
1703 | if (i == MAX_EVENT_INDEX) { |
1704 | pr_warning("Too many events are on the same function.\n"); | |
1705 | ret = -ERANGE; | |
1706 | } | |
1707 | ||
1708 | return ret; | |
b498ce1f MH |
1709 | } |
1710 | ||
0e60836b SD |
1711 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
1712 | struct probe_trace_event *tevs, | |
146a1439 | 1713 | int ntevs, bool allow_suffix) |
50656eec | 1714 | { |
146a1439 | 1715 | int i, fd, ret; |
0e60836b | 1716 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
1717 | char buf[64]; |
1718 | const char *event, *group; | |
b498ce1f | 1719 | struct strlist *namelist; |
50656eec | 1720 | |
f4d7da49 | 1721 | fd = open_kprobe_events(true); |
146a1439 MH |
1722 | if (fd < 0) |
1723 | return fd; | |
b498ce1f | 1724 | /* Get current event names */ |
0e60836b | 1725 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
1726 | if (!namelist) { |
1727 | pr_debug("Failed to get current event list.\n"); | |
1728 | return -EIO; | |
1729 | } | |
4235b045 | 1730 | |
146a1439 | 1731 | ret = 0; |
a844d1ef | 1732 | printf("Added new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1733 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1734 | tev = &tevs[i]; |
1735 | if (pev->event) | |
1736 | event = pev->event; | |
1737 | else | |
1738 | if (pev->point.function) | |
1739 | event = pev->point.function; | |
1740 | else | |
1741 | event = tev->point.symbol; | |
1742 | if (pev->group) | |
1743 | group = pev->group; | |
1744 | else | |
1745 | group = PERFPROBE_GROUP; | |
1746 | ||
1747 | /* Get an unused new event name */ | |
146a1439 MH |
1748 | ret = get_new_event_name(buf, 64, event, |
1749 | namelist, allow_suffix); | |
1750 | if (ret < 0) | |
1751 | break; | |
4235b045 MH |
1752 | event = buf; |
1753 | ||
02b95dad MH |
1754 | tev->event = strdup(event); |
1755 | tev->group = strdup(group); | |
1756 | if (tev->event == NULL || tev->group == NULL) { | |
1757 | ret = -ENOMEM; | |
1758 | break; | |
1759 | } | |
0e60836b | 1760 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
1761 | if (ret < 0) |
1762 | break; | |
4235b045 MH |
1763 | /* Add added event name to namelist */ |
1764 | strlist__add(namelist, event); | |
1765 | ||
1766 | /* Trick here - save current event/group */ | |
1767 | event = pev->event; | |
1768 | group = pev->group; | |
1769 | pev->event = tev->event; | |
1770 | pev->group = tev->group; | |
1771 | show_perf_probe_event(pev); | |
1772 | /* Trick here - restore current event/group */ | |
1773 | pev->event = (char *)event; | |
1774 | pev->group = (char *)group; | |
1775 | ||
1776 | /* | |
1777 | * Probes after the first probe which comes from same | |
1778 | * user input are always allowed to add suffix, because | |
1779 | * there might be several addresses corresponding to | |
1780 | * one code line. | |
1781 | */ | |
1782 | allow_suffix = true; | |
50656eec | 1783 | } |
146a1439 MH |
1784 | |
1785 | if (ret >= 0) { | |
1786 | /* Show how to use the event. */ | |
a844d1ef | 1787 | printf("\nYou can now use it in all perf tools, such as:\n\n"); |
146a1439 MH |
1788 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, |
1789 | tev->event); | |
1790 | } | |
a9b495b0 | 1791 | |
e1d2017b | 1792 | strlist__delete(namelist); |
50656eec | 1793 | close(fd); |
146a1439 | 1794 | return ret; |
50656eec | 1795 | } |
fa28244d | 1796 | |
0e60836b SD |
1797 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
1798 | struct probe_trace_event **tevs, | |
469b9b88 | 1799 | int max_tevs, const char *module) |
e0faa8d3 MH |
1800 | { |
1801 | struct symbol *sym; | |
e334016f | 1802 | int ret = 0, i; |
0e60836b | 1803 | struct probe_trace_event *tev; |
4235b045 | 1804 | |
4b4da7f7 | 1805 | /* Convert perf_probe_event with debuginfo */ |
469b9b88 | 1806 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, module); |
e334016f | 1807 | if (ret != 0) |
190b57fc | 1808 | return ret; /* Found in debuginfo or got an error */ |
e0faa8d3 | 1809 | |
4235b045 | 1810 | /* Allocate trace event buffer */ |
0e60836b | 1811 | tev = *tevs = zalloc(sizeof(struct probe_trace_event)); |
e334016f MH |
1812 | if (tev == NULL) |
1813 | return -ENOMEM; | |
4235b045 MH |
1814 | |
1815 | /* Copy parameters */ | |
02b95dad MH |
1816 | tev->point.symbol = strdup(pev->point.function); |
1817 | if (tev->point.symbol == NULL) { | |
1818 | ret = -ENOMEM; | |
1819 | goto error; | |
1820 | } | |
ce27a443 JZ |
1821 | |
1822 | if (module) { | |
1823 | tev->point.module = strdup(module); | |
1824 | if (tev->point.module == NULL) { | |
1825 | ret = -ENOMEM; | |
1826 | goto error; | |
1827 | } | |
190b57fc | 1828 | } |
ce27a443 | 1829 | |
4235b045 | 1830 | tev->point.offset = pev->point.offset; |
04ddd04b | 1831 | tev->point.retprobe = pev->point.retprobe; |
4235b045 MH |
1832 | tev->nargs = pev->nargs; |
1833 | if (tev->nargs) { | |
0e60836b | 1834 | tev->args = zalloc(sizeof(struct probe_trace_arg) |
e334016f MH |
1835 | * tev->nargs); |
1836 | if (tev->args == NULL) { | |
02b95dad MH |
1837 | ret = -ENOMEM; |
1838 | goto error; | |
e334016f | 1839 | } |
48481938 | 1840 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1841 | if (pev->args[i].name) { |
1842 | tev->args[i].name = strdup(pev->args[i].name); | |
1843 | if (tev->args[i].name == NULL) { | |
1844 | ret = -ENOMEM; | |
1845 | goto error; | |
1846 | } | |
1847 | } | |
1848 | tev->args[i].value = strdup(pev->args[i].var); | |
1849 | if (tev->args[i].value == NULL) { | |
1850 | ret = -ENOMEM; | |
1851 | goto error; | |
1852 | } | |
1853 | if (pev->args[i].type) { | |
1854 | tev->args[i].type = strdup(pev->args[i].type); | |
1855 | if (tev->args[i].type == NULL) { | |
1856 | ret = -ENOMEM; | |
1857 | goto error; | |
1858 | } | |
1859 | } | |
48481938 | 1860 | } |
4235b045 MH |
1861 | } |
1862 | ||
1863 | /* Currently just checking function name from symbol map */ | |
469b9b88 | 1864 | sym = __find_kernel_function_by_name(tev->point.symbol, NULL); |
146a1439 MH |
1865 | if (!sym) { |
1866 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1867 | tev->point.symbol); | |
02b95dad MH |
1868 | ret = -ENOENT; |
1869 | goto error; | |
1870 | } | |
e334016f | 1871 | |
02b95dad MH |
1872 | return 1; |
1873 | error: | |
0e60836b | 1874 | clear_probe_trace_event(tev); |
02b95dad MH |
1875 | free(tev); |
1876 | *tevs = NULL; | |
e334016f | 1877 | return ret; |
4235b045 MH |
1878 | } |
1879 | ||
1880 | struct __event_package { | |
1881 | struct perf_probe_event *pev; | |
0e60836b | 1882 | struct probe_trace_event *tevs; |
4235b045 MH |
1883 | int ntevs; |
1884 | }; | |
1885 | ||
146a1439 | 1886 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
469b9b88 | 1887 | int max_tevs, const char *module, bool force_add) |
4235b045 | 1888 | { |
146a1439 | 1889 | int i, j, ret; |
4235b045 MH |
1890 | struct __event_package *pkgs; |
1891 | ||
e334016f MH |
1892 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
1893 | if (pkgs == NULL) | |
1894 | return -ENOMEM; | |
4235b045 MH |
1895 | |
1896 | /* Init vmlinux path */ | |
146a1439 | 1897 | ret = init_vmlinux(); |
449e5b24 MH |
1898 | if (ret < 0) { |
1899 | free(pkgs); | |
146a1439 | 1900 | return ret; |
449e5b24 | 1901 | } |
4235b045 MH |
1902 | |
1903 | /* Loop 1: convert all events */ | |
1904 | for (i = 0; i < npevs; i++) { | |
1905 | pkgs[i].pev = &pevs[i]; | |
1906 | /* Convert with or without debuginfo */ | |
0e60836b | 1907 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
1908 | &pkgs[i].tevs, |
1909 | max_tevs, | |
1910 | module); | |
146a1439 MH |
1911 | if (ret < 0) |
1912 | goto end; | |
1913 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
1914 | } |
1915 | ||
4235b045 | 1916 | /* Loop 2: add all events */ |
8635bf6e | 1917 | for (i = 0; i < npevs; i++) { |
0e60836b | 1918 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 | 1919 | pkgs[i].ntevs, force_add); |
fbee632d ACM |
1920 | if (ret < 0) |
1921 | break; | |
1922 | } | |
146a1439 | 1923 | end: |
449e5b24 MH |
1924 | /* Loop 3: cleanup and free trace events */ |
1925 | for (i = 0; i < npevs; i++) { | |
146a1439 | 1926 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 1927 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
449e5b24 MH |
1928 | free(pkgs[i].tevs); |
1929 | } | |
1930 | free(pkgs); | |
146a1439 MH |
1931 | |
1932 | return ret; | |
e0faa8d3 MH |
1933 | } |
1934 | ||
0e60836b | 1935 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
1936 | { |
1937 | char *p; | |
1938 | char buf[128]; | |
4235b045 | 1939 | int ret; |
bbbb521b | 1940 | |
0e60836b | 1941 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
1942 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
1943 | if (ret < 0) | |
1944 | goto error; | |
1945 | ||
bbbb521b | 1946 | p = strchr(buf + 2, ':'); |
146a1439 MH |
1947 | if (!p) { |
1948 | pr_debug("Internal error: %s should have ':' but not.\n", | |
1949 | ent->s); | |
1950 | ret = -ENOTSUP; | |
1951 | goto error; | |
1952 | } | |
bbbb521b MH |
1953 | *p = '/'; |
1954 | ||
4235b045 MH |
1955 | pr_debug("Writing event: %s\n", buf); |
1956 | ret = write(fd, buf, strlen(buf)); | |
44a56040 MH |
1957 | if (ret < 0) { |
1958 | ret = -errno; | |
146a1439 | 1959 | goto error; |
44a56040 | 1960 | } |
146a1439 | 1961 | |
a844d1ef | 1962 | printf("Removed event: %s\n", ent->s); |
146a1439 MH |
1963 | return 0; |
1964 | error: | |
1965 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
1966 | return ret; | |
bbbb521b MH |
1967 | } |
1968 | ||
0e60836b | 1969 | static int del_trace_probe_event(int fd, const char *group, |
146a1439 | 1970 | const char *event, struct strlist *namelist) |
fa28244d MH |
1971 | { |
1972 | char buf[128]; | |
bbbb521b | 1973 | struct str_node *ent, *n; |
146a1439 | 1974 | int found = 0, ret = 0; |
fa28244d | 1975 | |
146a1439 MH |
1976 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
1977 | if (ret < 0) { | |
0e43e5d2 | 1978 | pr_err("Failed to copy event.\n"); |
146a1439 MH |
1979 | return ret; |
1980 | } | |
fa28244d | 1981 | |
bbbb521b MH |
1982 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
1983 | strlist__for_each_safe(ent, n, namelist) | |
1984 | if (strglobmatch(ent->s, buf)) { | |
1985 | found++; | |
0e60836b | 1986 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
1987 | if (ret < 0) |
1988 | break; | |
bbbb521b MH |
1989 | strlist__remove(namelist, ent); |
1990 | } | |
1991 | } else { | |
1992 | ent = strlist__find(namelist, buf); | |
1993 | if (ent) { | |
1994 | found++; | |
0e60836b | 1995 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
1996 | if (ret >= 0) |
1997 | strlist__remove(namelist, ent); | |
bbbb521b MH |
1998 | } |
1999 | } | |
146a1439 MH |
2000 | if (found == 0 && ret >= 0) |
2001 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
2002 | ||
2003 | return ret; | |
fa28244d MH |
2004 | } |
2005 | ||
146a1439 | 2006 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 2007 | { |
146a1439 | 2008 | int fd, ret = 0; |
fa28244d MH |
2009 | const char *group, *event; |
2010 | char *p, *str; | |
2011 | struct str_node *ent; | |
2012 | struct strlist *namelist; | |
2013 | ||
f4d7da49 | 2014 | fd = open_kprobe_events(true); |
146a1439 MH |
2015 | if (fd < 0) |
2016 | return fd; | |
2017 | ||
fa28244d | 2018 | /* Get current event names */ |
0e60836b | 2019 | namelist = get_probe_trace_event_names(fd, true); |
146a1439 MH |
2020 | if (namelist == NULL) |
2021 | return -EINVAL; | |
fa28244d | 2022 | |
adf365f4 | 2023 | strlist__for_each(ent, dellist) { |
02b95dad MH |
2024 | str = strdup(ent->s); |
2025 | if (str == NULL) { | |
2026 | ret = -ENOMEM; | |
2027 | break; | |
2028 | } | |
bbbb521b | 2029 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
2030 | p = strchr(str, ':'); |
2031 | if (p) { | |
2032 | group = str; | |
2033 | *p = '\0'; | |
2034 | event = p + 1; | |
2035 | } else { | |
bbbb521b | 2036 | group = "*"; |
fa28244d MH |
2037 | event = str; |
2038 | } | |
bbbb521b | 2039 | pr_debug("Group: %s, Event: %s\n", group, event); |
0e60836b | 2040 | ret = del_trace_probe_event(fd, group, event, namelist); |
fa28244d | 2041 | free(str); |
146a1439 MH |
2042 | if (ret < 0) |
2043 | break; | |
fa28244d MH |
2044 | } |
2045 | strlist__delete(namelist); | |
2046 | close(fd); | |
146a1439 MH |
2047 | |
2048 | return ret; | |
fa28244d | 2049 | } |
3c42258c MH |
2050 | /* TODO: don't use a global variable for filter ... */ |
2051 | static struct strfilter *available_func_filter; | |
fa28244d | 2052 | |
e80711ca | 2053 | /* |
3c42258c MH |
2054 | * If a symbol corresponds to a function with global binding and |
2055 | * matches filter return 0. For all others return 1. | |
e80711ca | 2056 | */ |
3c42258c MH |
2057 | static int filter_available_functions(struct map *map __unused, |
2058 | struct symbol *sym) | |
e80711ca | 2059 | { |
3c42258c MH |
2060 | if (sym->binding == STB_GLOBAL && |
2061 | strfilter__compare(available_func_filter, sym->name)) | |
2062 | return 0; | |
2063 | return 1; | |
e80711ca MH |
2064 | } |
2065 | ||
3c42258c | 2066 | int show_available_funcs(const char *module, struct strfilter *_filter) |
e80711ca MH |
2067 | { |
2068 | struct map *map; | |
2069 | int ret; | |
2070 | ||
2071 | setup_pager(); | |
2072 | ||
2073 | ret = init_vmlinux(); | |
2074 | if (ret < 0) | |
2075 | return ret; | |
2076 | ||
2077 | map = kernel_get_module_map(module); | |
2078 | if (!map) { | |
2079 | pr_err("Failed to find %s map.\n", (module) ? : "kernel"); | |
2080 | return -EINVAL; | |
2081 | } | |
3c42258c MH |
2082 | available_func_filter = _filter; |
2083 | if (map__load(map, filter_available_functions)) { | |
e80711ca MH |
2084 | pr_err("Failed to load map.\n"); |
2085 | return -EINVAL; | |
2086 | } | |
2087 | if (!dso__sorted_by_name(map->dso, map->type)) | |
2088 | dso__sort_by_name(map->dso, map->type); | |
2089 | ||
2090 | dso__fprintf_symbols_by_name(map->dso, map->type, stdout); | |
2091 | return 0; | |
2092 | } |