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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 | ||
22 | #define _GNU_SOURCE | |
23 | #include <sys/utsname.h> | |
24 | #include <sys/types.h> | |
25 | #include <sys/stat.h> | |
26 | #include <fcntl.h> | |
27 | #include <errno.h> | |
28 | #include <stdio.h> | |
29 | #include <unistd.h> | |
30 | #include <stdlib.h> | |
31 | #include <string.h> | |
4de189fe MH |
32 | #include <stdarg.h> |
33 | #include <limits.h> | |
e80711ca | 34 | #include <elf.h> |
50656eec MH |
35 | |
36 | #undef _GNU_SOURCE | |
31facc5f | 37 | #include "util.h" |
50656eec | 38 | #include "event.h" |
e1c01d61 | 39 | #include "string.h" |
4de189fe | 40 | #include "strlist.h" |
50656eec | 41 | #include "debug.h" |
72041334 | 42 | #include "cache.h" |
631c9def | 43 | #include "color.h" |
e0faa8d3 MH |
44 | #include "symbol.h" |
45 | #include "thread.h" | |
7ca5989d | 46 | #include "debugfs.h" |
4b4da7f7 | 47 | #include "trace-event.h" /* For __unused */ |
50656eec | 48 | #include "probe-event.h" |
4235b045 | 49 | #include "probe-finder.h" |
50656eec MH |
50 | |
51 | #define MAX_CMDLEN 256 | |
52 | #define MAX_PROBE_ARGS 128 | |
53 | #define PERFPROBE_GROUP "probe" | |
54 | ||
f4d7da49 MH |
55 | bool probe_event_dry_run; /* Dry run flag */ |
56 | ||
146a1439 | 57 | #define semantic_error(msg ...) pr_err("Semantic error :" msg) |
50656eec | 58 | |
4de189fe | 59 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
60 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
61 | __attribute__((format(printf, 3, 4))); | |
62 | ||
4de189fe MH |
63 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
64 | { | |
65 | int ret; | |
66 | va_list ap; | |
67 | va_start(ap, format); | |
68 | ret = vsnprintf(str, size, format, ap); | |
69 | va_end(ap); | |
70 | if (ret >= (int)size) | |
71 | ret = -E2BIG; | |
72 | return ret; | |
73 | } | |
74 | ||
4b4da7f7 | 75 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp); |
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) { | |
158 | if (dso__load_vmlinux(dso, map, vmlinux_name, NULL) <= 0) | |
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 | ||
4b4da7f7 | 176 | #ifdef DWARF_SUPPORT |
ff741783 MH |
177 | /* Open new debuginfo of given module */ |
178 | static struct debuginfo *open_debuginfo(const char *module) | |
e0faa8d3 | 179 | { |
14a8fd7c | 180 | const char *path; |
ff741783 | 181 | |
14a8fd7c MH |
182 | /* A file path -- this is an offline module */ |
183 | if (module && strchr(module, '/')) | |
184 | path = module; | |
185 | else { | |
186 | path = kernel_get_module_path(module); | |
187 | ||
188 | if (!path) { | |
189 | pr_err("Failed to find path of %s module.\n", | |
190 | module ?: "kernel"); | |
191 | return NULL; | |
192 | } | |
e0faa8d3 | 193 | } |
ff741783 | 194 | return debuginfo__new(path); |
e0faa8d3 | 195 | } |
4b4da7f7 | 196 | |
0e60836b SD |
197 | /* |
198 | * Convert trace point to probe point with debuginfo | |
199 | * Currently only handles kprobes. | |
200 | */ | |
201 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, | |
469b9b88 | 202 | struct perf_probe_point *pp) |
4b4da7f7 MH |
203 | { |
204 | struct symbol *sym; | |
469b9b88 MH |
205 | struct map *map; |
206 | u64 addr; | |
207 | int ret = -ENOENT; | |
ff741783 | 208 | struct debuginfo *dinfo; |
4b4da7f7 | 209 | |
469b9b88 | 210 | sym = __find_kernel_function_by_name(tp->symbol, &map); |
4b4da7f7 | 211 | if (sym) { |
469b9b88 | 212 | addr = map->unmap_ip(map, sym->start + tp->offset); |
9486aa38 | 213 | pr_debug("try to find %s+%ld@%" PRIx64 "\n", tp->symbol, |
469b9b88 | 214 | tp->offset, addr); |
ff741783 MH |
215 | |
216 | dinfo = debuginfo__new_online_kernel(addr); | |
217 | if (dinfo) { | |
218 | ret = debuginfo__find_probe_point(dinfo, | |
219 | (unsigned long)addr, pp); | |
220 | debuginfo__delete(dinfo); | |
221 | } else { | |
222 | pr_debug("Failed to open debuginfo at 0x%" PRIx64 "\n", | |
223 | addr); | |
224 | ret = -ENOENT; | |
225 | } | |
4b4da7f7 MH |
226 | } |
227 | if (ret <= 0) { | |
146a1439 MH |
228 | pr_debug("Failed to find corresponding probes from " |
229 | "debuginfo. Use kprobe event information.\n"); | |
02b95dad MH |
230 | pp->function = strdup(tp->symbol); |
231 | if (pp->function == NULL) | |
232 | return -ENOMEM; | |
4b4da7f7 MH |
233 | pp->offset = tp->offset; |
234 | } | |
235 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
236 | |
237 | return 0; | |
4b4da7f7 MH |
238 | } |
239 | ||
190b57fc MH |
240 | static int add_module_to_probe_trace_events(struct probe_trace_event *tevs, |
241 | int ntevs, const char *module) | |
242 | { | |
14a8fd7c MH |
243 | int i, ret = 0; |
244 | char *tmp; | |
245 | ||
246 | if (!module) | |
247 | return 0; | |
248 | ||
249 | tmp = strrchr(module, '/'); | |
250 | if (tmp) { | |
251 | /* This is a module path -- get the module name */ | |
252 | module = strdup(tmp + 1); | |
253 | if (!module) | |
254 | return -ENOMEM; | |
255 | tmp = strchr(module, '.'); | |
256 | if (tmp) | |
257 | *tmp = '\0'; | |
258 | tmp = (char *)module; /* For free() */ | |
259 | } | |
260 | ||
190b57fc MH |
261 | for (i = 0; i < ntevs; i++) { |
262 | tevs[i].point.module = strdup(module); | |
14a8fd7c MH |
263 | if (!tevs[i].point.module) { |
264 | ret = -ENOMEM; | |
265 | break; | |
266 | } | |
190b57fc | 267 | } |
14a8fd7c MH |
268 | |
269 | if (tmp) | |
270 | free(tmp); | |
271 | ||
272 | return ret; | |
190b57fc MH |
273 | } |
274 | ||
4b4da7f7 | 275 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 276 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
190b57fc MH |
277 | struct probe_trace_event **tevs, |
278 | int max_tevs, const char *module) | |
4b4da7f7 MH |
279 | { |
280 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
ff741783 | 281 | struct debuginfo *dinfo = open_debuginfo(module); |
190b57fc | 282 | int ntevs, ret = 0; |
4b4da7f7 | 283 | |
ff741783 | 284 | if (!dinfo) { |
146a1439 MH |
285 | if (need_dwarf) { |
286 | pr_warning("Failed to open debuginfo file.\n"); | |
ff741783 | 287 | return -ENOENT; |
146a1439 | 288 | } |
ff741783 | 289 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
290 | return 0; |
291 | } | |
292 | ||
ff741783 MH |
293 | /* Searching trace events corresponding to a probe event */ |
294 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs); | |
295 | ||
296 | debuginfo__delete(dinfo); | |
4b4da7f7 | 297 | |
146a1439 | 298 | if (ntevs > 0) { /* Succeeded to find trace events */ |
0e60836b | 299 | pr_debug("find %d probe_trace_events.\n", ntevs); |
190b57fc MH |
300 | if (module) |
301 | ret = add_module_to_probe_trace_events(*tevs, ntevs, | |
302 | module); | |
303 | return ret < 0 ? ret : ntevs; | |
146a1439 | 304 | } |
4b4da7f7 | 305 | |
146a1439 MH |
306 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
307 | pr_warning("Probe point '%s' not found.\n", | |
308 | synthesize_perf_probe_point(&pev->point)); | |
309 | return -ENOENT; | |
310 | } | |
311 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
312 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
313 | if (ntevs == -EBADF) { | |
314 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
315 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
316 | if (!need_dwarf) { | |
0e43e5d2 | 317 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
318 | return 0; |
319 | } | |
4b4da7f7 | 320 | } |
15eca306 | 321 | return ntevs; |
4b4da7f7 MH |
322 | } |
323 | ||
7cf0b79e MH |
324 | /* |
325 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
326 | * and chop off leading directories that do not exist. Result is passed back as | |
327 | * a newly allocated path on success. | |
328 | * Return 0 if file was found and readable, -errno otherwise. | |
329 | */ | |
6a330a3c MH |
330 | static int get_real_path(const char *raw_path, const char *comp_dir, |
331 | char **new_path) | |
7cf0b79e | 332 | { |
6a330a3c MH |
333 | const char *prefix = symbol_conf.source_prefix; |
334 | ||
335 | if (!prefix) { | |
336 | if (raw_path[0] != '/' && comp_dir) | |
337 | /* If not an absolute path, try to use comp_dir */ | |
338 | prefix = comp_dir; | |
339 | else { | |
340 | if (access(raw_path, R_OK) == 0) { | |
341 | *new_path = strdup(raw_path); | |
342 | return 0; | |
343 | } else | |
344 | return -errno; | |
345 | } | |
7cf0b79e MH |
346 | } |
347 | ||
6a330a3c | 348 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
7cf0b79e MH |
349 | if (!*new_path) |
350 | return -ENOMEM; | |
351 | ||
352 | for (;;) { | |
6a330a3c | 353 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
7cf0b79e MH |
354 | |
355 | if (access(*new_path, R_OK) == 0) | |
356 | return 0; | |
357 | ||
6a330a3c MH |
358 | if (!symbol_conf.source_prefix) |
359 | /* In case of searching comp_dir, don't retry */ | |
360 | return -errno; | |
361 | ||
7cf0b79e MH |
362 | switch (errno) { |
363 | case ENAMETOOLONG: | |
364 | case ENOENT: | |
365 | case EROFS: | |
366 | case EFAULT: | |
367 | raw_path = strchr(++raw_path, '/'); | |
368 | if (!raw_path) { | |
369 | free(*new_path); | |
370 | *new_path = NULL; | |
371 | return -ENOENT; | |
372 | } | |
373 | continue; | |
374 | ||
375 | default: | |
376 | free(*new_path); | |
377 | *new_path = NULL; | |
378 | return -errno; | |
379 | } | |
380 | } | |
381 | } | |
382 | ||
4b4da7f7 MH |
383 | #define LINEBUF_SIZE 256 |
384 | #define NR_ADDITIONAL_LINES 2 | |
385 | ||
fde52dbd | 386 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
387 | { |
388 | char buf[LINEBUF_SIZE]; | |
befe3414 FBH |
389 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
390 | const char *prefix = NULL; | |
4b4da7f7 | 391 | |
befe3414 | 392 | do { |
4b4da7f7 MH |
393 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
394 | goto error; | |
befe3414 FBH |
395 | if (skip) |
396 | continue; | |
397 | if (!prefix) { | |
398 | prefix = show_num ? "%7d " : " "; | |
399 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 400 | } |
befe3414 FBH |
401 | color_fprintf(stdout, color, "%s", buf); |
402 | ||
403 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 404 | |
fde52dbd | 405 | return 1; |
4b4da7f7 | 406 | error: |
fde52dbd | 407 | if (ferror(fp)) { |
32b2b6ec | 408 | pr_warning("File read error: %s\n", strerror(errno)); |
fde52dbd FBH |
409 | return -1; |
410 | } | |
411 | return 0; | |
412 | } | |
146a1439 | 413 | |
fde52dbd FBH |
414 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
415 | { | |
416 | int rv = __show_one_line(fp, l, skip, show_num); | |
417 | if (rv == 0) { | |
418 | pr_warning("Source file is shorter than expected.\n"); | |
419 | rv = -1; | |
420 | } | |
421 | return rv; | |
4b4da7f7 MH |
422 | } |
423 | ||
fde52dbd FBH |
424 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
425 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
426 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
427 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
428 | ||
4b4da7f7 MH |
429 | /* |
430 | * Show line-range always requires debuginfo to find source file and | |
431 | * line number. | |
432 | */ | |
469b9b88 | 433 | int show_line_range(struct line_range *lr, const char *module) |
4b4da7f7 | 434 | { |
d3b63d7a | 435 | int l = 1; |
4b4da7f7 | 436 | struct line_node *ln; |
ff741783 | 437 | struct debuginfo *dinfo; |
4b4da7f7 | 438 | FILE *fp; |
ff741783 | 439 | int ret; |
7cf0b79e | 440 | char *tmp; |
4b4da7f7 MH |
441 | |
442 | /* Search a line range */ | |
146a1439 MH |
443 | ret = init_vmlinux(); |
444 | if (ret < 0) | |
445 | return ret; | |
446 | ||
ff741783 MH |
447 | dinfo = open_debuginfo(module); |
448 | if (!dinfo) { | |
146a1439 | 449 | pr_warning("Failed to open debuginfo file.\n"); |
ff741783 | 450 | return -ENOENT; |
146a1439 MH |
451 | } |
452 | ||
ff741783 MH |
453 | ret = debuginfo__find_line_range(dinfo, lr); |
454 | debuginfo__delete(dinfo); | |
146a1439 MH |
455 | if (ret == 0) { |
456 | pr_warning("Specified source line is not found.\n"); | |
457 | return -ENOENT; | |
458 | } else if (ret < 0) { | |
459 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
460 | return ret; | |
461 | } | |
4b4da7f7 | 462 | |
7cf0b79e MH |
463 | /* Convert source file path */ |
464 | tmp = lr->path; | |
6a330a3c | 465 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
7cf0b79e MH |
466 | free(tmp); /* Free old path */ |
467 | if (ret < 0) { | |
468 | pr_warning("Failed to find source file. (%d)\n", ret); | |
469 | return ret; | |
470 | } | |
471 | ||
4b4da7f7 MH |
472 | setup_pager(); |
473 | ||
474 | if (lr->function) | |
8737ebde | 475 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
476 | lr->start - lr->offset); |
477 | else | |
62c15fc4 | 478 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
479 | |
480 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
481 | if (fp == NULL) { |
482 | pr_warning("Failed to open %s: %s\n", lr->path, | |
483 | strerror(errno)); | |
484 | return -errno; | |
485 | } | |
4b4da7f7 | 486 | /* Skip to starting line number */ |
44b81e92 | 487 | while (l < lr->start) { |
fde52dbd | 488 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
489 | if (ret < 0) |
490 | goto end; | |
491 | } | |
4b4da7f7 MH |
492 | |
493 | list_for_each_entry(ln, &lr->line_list, list) { | |
44b81e92 | 494 | for (; ln->line > l; l++) { |
fde52dbd | 495 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
496 | if (ret < 0) |
497 | goto end; | |
498 | } | |
fde52dbd | 499 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
500 | if (ret < 0) |
501 | goto end; | |
4b4da7f7 MH |
502 | } |
503 | ||
504 | if (lr->end == INT_MAX) | |
505 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
506 | while (l <= lr->end) { |
507 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
508 | if (ret <= 0) | |
44b81e92 FBH |
509 | break; |
510 | } | |
146a1439 | 511 | end: |
4b4da7f7 | 512 | fclose(fp); |
146a1439 | 513 | return ret; |
4b4da7f7 MH |
514 | } |
515 | ||
ff741783 MH |
516 | static int show_available_vars_at(struct debuginfo *dinfo, |
517 | struct perf_probe_event *pev, | |
bd09d7b5 MH |
518 | int max_vls, struct strfilter *_filter, |
519 | bool externs) | |
cf6eb489 MH |
520 | { |
521 | char *buf; | |
bd09d7b5 | 522 | int ret, i, nvars; |
cf6eb489 MH |
523 | struct str_node *node; |
524 | struct variable_list *vls = NULL, *vl; | |
bd09d7b5 | 525 | const char *var; |
cf6eb489 MH |
526 | |
527 | buf = synthesize_perf_probe_point(&pev->point); | |
528 | if (!buf) | |
529 | return -EINVAL; | |
530 | pr_debug("Searching variables at %s\n", buf); | |
531 | ||
ff741783 MH |
532 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls, |
533 | max_vls, externs); | |
bd09d7b5 MH |
534 | if (ret <= 0) { |
535 | pr_err("Failed to find variables at %s (%d)\n", buf, ret); | |
536 | goto end; | |
537 | } | |
538 | /* Some variables are found */ | |
539 | fprintf(stdout, "Available variables at %s\n", buf); | |
540 | for (i = 0; i < ret; i++) { | |
541 | vl = &vls[i]; | |
542 | /* | |
543 | * A probe point might be converted to | |
544 | * several trace points. | |
545 | */ | |
546 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
547 | vl->point.offset); | |
548 | free(vl->point.symbol); | |
549 | nvars = 0; | |
550 | if (vl->vars) { | |
551 | strlist__for_each(node, vl->vars) { | |
552 | var = strchr(node->s, '\t') + 1; | |
553 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 554 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
555 | nvars++; |
556 | } | |
557 | } | |
558 | strlist__delete(vl->vars); | |
cf6eb489 | 559 | } |
bd09d7b5 MH |
560 | if (nvars == 0) |
561 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
562 | } | |
563 | free(vls); | |
564 | end: | |
cf6eb489 MH |
565 | free(buf); |
566 | return ret; | |
567 | } | |
568 | ||
569 | /* Show available variables on given probe point */ | |
570 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
bd09d7b5 MH |
571 | int max_vls, const char *module, |
572 | struct strfilter *_filter, bool externs) | |
cf6eb489 | 573 | { |
ff741783 MH |
574 | int i, ret = 0; |
575 | struct debuginfo *dinfo; | |
cf6eb489 MH |
576 | |
577 | ret = init_vmlinux(); | |
578 | if (ret < 0) | |
579 | return ret; | |
580 | ||
ff741783 MH |
581 | dinfo = open_debuginfo(module); |
582 | if (!dinfo) { | |
583 | pr_warning("Failed to open debuginfo file.\n"); | |
584 | return -ENOENT; | |
585 | } | |
586 | ||
cf6eb489 MH |
587 | setup_pager(); |
588 | ||
ff741783 MH |
589 | for (i = 0; i < npevs && ret >= 0; i++) |
590 | ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter, | |
bd09d7b5 | 591 | externs); |
ff741783 MH |
592 | |
593 | debuginfo__delete(dinfo); | |
cf6eb489 MH |
594 | return ret; |
595 | } | |
596 | ||
4b4da7f7 MH |
597 | #else /* !DWARF_SUPPORT */ |
598 | ||
0e60836b | 599 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, |
469b9b88 | 600 | struct perf_probe_point *pp) |
4b4da7f7 | 601 | { |
469b9b88 MH |
602 | struct symbol *sym; |
603 | ||
604 | sym = __find_kernel_function_by_name(tp->symbol, NULL); | |
605 | if (!sym) { | |
606 | pr_err("Failed to find symbol %s in kernel.\n", tp->symbol); | |
607 | return -ENOENT; | |
608 | } | |
02b95dad MH |
609 | pp->function = strdup(tp->symbol); |
610 | if (pp->function == NULL) | |
611 | return -ENOMEM; | |
4b4da7f7 MH |
612 | pp->offset = tp->offset; |
613 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
614 | |
615 | return 0; | |
4b4da7f7 MH |
616 | } |
617 | ||
0e60836b SD |
618 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
619 | struct probe_trace_event **tevs __unused, | |
469b9b88 | 620 | int max_tevs __unused, const char *mod __unused) |
4b4da7f7 | 621 | { |
146a1439 MH |
622 | if (perf_probe_event_need_dwarf(pev)) { |
623 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
624 | return -ENOSYS; | |
625 | } | |
4b4da7f7 MH |
626 | return 0; |
627 | } | |
628 | ||
469b9b88 | 629 | int show_line_range(struct line_range *lr __unused, const char *module __unused) |
4b4da7f7 | 630 | { |
146a1439 MH |
631 | pr_warning("Debuginfo-analysis is not supported.\n"); |
632 | return -ENOSYS; | |
4b4da7f7 MH |
633 | } |
634 | ||
cf6eb489 | 635 | int show_available_vars(struct perf_probe_event *pevs __unused, |
469b9b88 | 636 | int npevs __unused, int max_vls __unused, |
bd09d7b5 MH |
637 | const char *module __unused, |
638 | struct strfilter *filter __unused, | |
639 | bool externs __unused) | |
cf6eb489 MH |
640 | { |
641 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
642 | return -ENOSYS; | |
643 | } | |
e0faa8d3 MH |
644 | #endif |
645 | ||
21dd9ae5 FBH |
646 | static int parse_line_num(char **ptr, int *val, const char *what) |
647 | { | |
648 | const char *start = *ptr; | |
649 | ||
650 | errno = 0; | |
651 | *val = strtol(*ptr, ptr, 0); | |
652 | if (errno || *ptr == start) { | |
653 | semantic_error("'%s' is not a valid number.\n", what); | |
654 | return -EINVAL; | |
655 | } | |
656 | return 0; | |
657 | } | |
658 | ||
9d95b580 FBH |
659 | /* |
660 | * Stuff 'lr' according to the line range described by 'arg'. | |
661 | * The line range syntax is described by: | |
662 | * | |
663 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 664 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 665 | */ |
146a1439 | 666 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 667 | { |
e116dfa1 | 668 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
669 | int err; |
670 | ||
671 | if (!name) | |
672 | return -ENOMEM; | |
673 | ||
674 | lr->start = 0; | |
675 | lr->end = INT_MAX; | |
676 | ||
677 | range = strchr(name, ':'); | |
678 | if (range) { | |
679 | *range++ = '\0'; | |
680 | ||
681 | err = parse_line_num(&range, &lr->start, "start line"); | |
682 | if (err) | |
683 | goto err; | |
684 | ||
685 | if (*range == '+' || *range == '-') { | |
686 | const char c = *range++; | |
687 | ||
688 | err = parse_line_num(&range, &lr->end, "end line"); | |
689 | if (err) | |
690 | goto err; | |
691 | ||
692 | if (c == '+') { | |
693 | lr->end += lr->start; | |
694 | /* | |
695 | * Adjust the number of lines here. | |
696 | * If the number of lines == 1, the | |
697 | * the end of line should be equal to | |
698 | * the start of line. | |
699 | */ | |
700 | lr->end--; | |
701 | } | |
702 | } | |
9d95b580 | 703 | |
d3b63d7a | 704 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
705 | |
706 | err = -EINVAL; | |
d3b63d7a | 707 | if (lr->start > lr->end) { |
631c9def | 708 | semantic_error("Start line must be smaller" |
146a1439 | 709 | " than end line.\n"); |
21dd9ae5 | 710 | goto err; |
146a1439 | 711 | } |
21dd9ae5 FBH |
712 | if (*range != '\0') { |
713 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
714 | goto err; | |
146a1439 | 715 | } |
d3b63d7a | 716 | } |
02b95dad | 717 | |
e116dfa1 MH |
718 | file = strchr(name, '@'); |
719 | if (file) { | |
720 | *file = '\0'; | |
721 | lr->file = strdup(++file); | |
722 | if (lr->file == NULL) { | |
723 | err = -ENOMEM; | |
724 | goto err; | |
725 | } | |
726 | lr->function = name; | |
727 | } else if (strchr(name, '.')) | |
21dd9ae5 | 728 | lr->file = name; |
631c9def | 729 | else |
21dd9ae5 | 730 | lr->function = name; |
146a1439 MH |
731 | |
732 | return 0; | |
21dd9ae5 FBH |
733 | err: |
734 | free(name); | |
735 | return err; | |
631c9def MH |
736 | } |
737 | ||
b7702a21 MH |
738 | /* Check the name is good for event/group */ |
739 | static bool check_event_name(const char *name) | |
740 | { | |
741 | if (!isalpha(*name) && *name != '_') | |
742 | return false; | |
743 | while (*++name != '\0') { | |
744 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
745 | return false; | |
746 | } | |
747 | return true; | |
748 | } | |
749 | ||
50656eec | 750 | /* Parse probepoint definition. */ |
146a1439 | 751 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 752 | { |
4235b045 | 753 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
754 | char *ptr, *tmp; |
755 | char c, nc = 0; | |
756 | /* | |
757 | * <Syntax> | |
2a9c8c36 MH |
758 | * perf probe [EVENT=]SRC[:LN|;PTN] |
759 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
760 | * |
761 | * TODO:Group name support | |
50656eec MH |
762 | */ |
763 | ||
2a9c8c36 MH |
764 | ptr = strpbrk(arg, ";=@+%"); |
765 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
766 | *ptr = '\0'; |
767 | tmp = ptr + 1; | |
146a1439 MH |
768 | if (strchr(arg, ':')) { |
769 | semantic_error("Group name is not supported yet.\n"); | |
770 | return -ENOTSUP; | |
771 | } | |
772 | if (!check_event_name(arg)) { | |
b7702a21 | 773 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
774 | "follow C symbol-naming rule.\n", arg); |
775 | return -EINVAL; | |
776 | } | |
02b95dad MH |
777 | pev->event = strdup(arg); |
778 | if (pev->event == NULL) | |
779 | return -ENOMEM; | |
4235b045 | 780 | pev->group = NULL; |
af663d75 MH |
781 | arg = tmp; |
782 | } | |
783 | ||
2a9c8c36 | 784 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
785 | if (ptr) { |
786 | nc = *ptr; | |
787 | *ptr++ = '\0'; | |
788 | } | |
789 | ||
02b95dad MH |
790 | tmp = strdup(arg); |
791 | if (tmp == NULL) | |
792 | return -ENOMEM; | |
793 | ||
50656eec | 794 | /* Check arg is function or file and copy it */ |
02b95dad MH |
795 | if (strchr(tmp, '.')) /* File */ |
796 | pp->file = tmp; | |
50656eec | 797 | else /* Function */ |
02b95dad | 798 | pp->function = tmp; |
50656eec MH |
799 | |
800 | /* Parse other options */ | |
801 | while (ptr) { | |
802 | arg = ptr; | |
803 | c = nc; | |
2a9c8c36 | 804 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
805 | pp->lazy_line = strdup(arg); |
806 | if (pp->lazy_line == NULL) | |
807 | return -ENOMEM; | |
2a9c8c36 MH |
808 | break; |
809 | } | |
810 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
811 | if (ptr) { |
812 | nc = *ptr; | |
813 | *ptr++ = '\0'; | |
814 | } | |
815 | switch (c) { | |
816 | case ':': /* Line number */ | |
817 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 818 | if (*tmp != '\0') { |
2a9c8c36 | 819 | semantic_error("There is non-digit char" |
146a1439 MH |
820 | " in line number.\n"); |
821 | return -EINVAL; | |
822 | } | |
50656eec MH |
823 | break; |
824 | case '+': /* Byte offset from a symbol */ | |
825 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 826 | if (*tmp != '\0') { |
2a9c8c36 | 827 | semantic_error("There is non-digit character" |
146a1439 MH |
828 | " in offset.\n"); |
829 | return -EINVAL; | |
830 | } | |
50656eec MH |
831 | break; |
832 | case '@': /* File name */ | |
146a1439 MH |
833 | if (pp->file) { |
834 | semantic_error("SRC@SRC is not allowed.\n"); | |
835 | return -EINVAL; | |
836 | } | |
02b95dad MH |
837 | pp->file = strdup(arg); |
838 | if (pp->file == NULL) | |
839 | return -ENOMEM; | |
50656eec MH |
840 | break; |
841 | case '%': /* Probe places */ | |
842 | if (strcmp(arg, "return") == 0) { | |
843 | pp->retprobe = 1; | |
146a1439 MH |
844 | } else { /* Others not supported yet */ |
845 | semantic_error("%%%s is not supported.\n", arg); | |
846 | return -ENOTSUP; | |
847 | } | |
50656eec | 848 | break; |
146a1439 MH |
849 | default: /* Buggy case */ |
850 | pr_err("This program has a bug at %s:%d.\n", | |
851 | __FILE__, __LINE__); | |
852 | return -ENOTSUP; | |
50656eec MH |
853 | break; |
854 | } | |
855 | } | |
856 | ||
857 | /* Exclusion check */ | |
146a1439 | 858 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
859 | semantic_error("Lazy pattern can't be used with" |
860 | " line number.\n"); | |
146a1439 MH |
861 | return -EINVAL; |
862 | } | |
2a9c8c36 | 863 | |
146a1439 | 864 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 865 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
866 | return -EINVAL; |
867 | } | |
2a9c8c36 | 868 | |
146a1439 | 869 | if (pp->line && pp->offset) { |
0e43e5d2 | 870 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
871 | return -EINVAL; |
872 | } | |
50656eec | 873 | |
146a1439 | 874 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 875 | semantic_error("File always requires line number or " |
0e43e5d2 | 876 | "lazy pattern.\n"); |
146a1439 MH |
877 | return -EINVAL; |
878 | } | |
50656eec | 879 | |
146a1439 | 880 | if (pp->offset && !pp->function) { |
0e43e5d2 | 881 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
882 | return -EINVAL; |
883 | } | |
50656eec | 884 | |
146a1439 | 885 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 886 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
887 | return -EINVAL; |
888 | } | |
50656eec | 889 | |
146a1439 | 890 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 891 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 892 | "return probe.\n"); |
146a1439 MH |
893 | return -EINVAL; |
894 | } | |
50656eec | 895 | |
4235b045 | 896 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
897 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
898 | pp->lazy_line); | |
146a1439 | 899 | return 0; |
50656eec MH |
900 | } |
901 | ||
7df2f329 | 902 | /* Parse perf-probe event argument */ |
146a1439 | 903 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 904 | { |
b2a3c12b | 905 | char *tmp, *goodname; |
7df2f329 MH |
906 | struct perf_probe_arg_field **fieldp; |
907 | ||
908 | pr_debug("parsing arg: %s into ", str); | |
909 | ||
48481938 MH |
910 | tmp = strchr(str, '='); |
911 | if (tmp) { | |
02b95dad MH |
912 | arg->name = strndup(str, tmp - str); |
913 | if (arg->name == NULL) | |
914 | return -ENOMEM; | |
11a1ca35 | 915 | pr_debug("name:%s ", arg->name); |
48481938 MH |
916 | str = tmp + 1; |
917 | } | |
918 | ||
11a1ca35 MH |
919 | tmp = strchr(str, ':'); |
920 | if (tmp) { /* Type setting */ | |
921 | *tmp = '\0'; | |
02b95dad MH |
922 | arg->type = strdup(tmp + 1); |
923 | if (arg->type == NULL) | |
924 | return -ENOMEM; | |
11a1ca35 MH |
925 | pr_debug("type:%s ", arg->type); |
926 | } | |
927 | ||
b2a3c12b | 928 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
929 | if (!is_c_varname(str) || !tmp) { |
930 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
931 | arg->var = strdup(str); |
932 | if (arg->var == NULL) | |
933 | return -ENOMEM; | |
48481938 | 934 | pr_debug("%s\n", arg->var); |
146a1439 | 935 | return 0; |
7df2f329 MH |
936 | } |
937 | ||
b2a3c12b | 938 | /* Structure fields or array element */ |
02b95dad MH |
939 | arg->var = strndup(str, tmp - str); |
940 | if (arg->var == NULL) | |
941 | return -ENOMEM; | |
b2a3c12b | 942 | goodname = arg->var; |
48481938 | 943 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
944 | fieldp = &arg->field; |
945 | ||
946 | do { | |
e334016f MH |
947 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
948 | if (*fieldp == NULL) | |
949 | return -ENOMEM; | |
b2a3c12b MH |
950 | if (*tmp == '[') { /* Array */ |
951 | str = tmp; | |
952 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 953 | (*fieldp)->ref = true; |
b2a3c12b MH |
954 | if (*tmp != ']' || tmp == str + 1) { |
955 | semantic_error("Array index must be a" | |
956 | " number.\n"); | |
957 | return -EINVAL; | |
958 | } | |
959 | tmp++; | |
960 | if (*tmp == '\0') | |
961 | tmp = NULL; | |
962 | } else { /* Structure */ | |
963 | if (*tmp == '.') { | |
964 | str = tmp + 1; | |
965 | (*fieldp)->ref = false; | |
966 | } else if (tmp[1] == '>') { | |
967 | str = tmp + 2; | |
968 | (*fieldp)->ref = true; | |
969 | } else { | |
970 | semantic_error("Argument parse error: %s\n", | |
971 | str); | |
972 | return -EINVAL; | |
973 | } | |
974 | tmp = strpbrk(str, "-.["); | |
146a1439 | 975 | } |
7df2f329 | 976 | if (tmp) { |
02b95dad MH |
977 | (*fieldp)->name = strndup(str, tmp - str); |
978 | if ((*fieldp)->name == NULL) | |
979 | return -ENOMEM; | |
b2a3c12b MH |
980 | if (*str != '[') |
981 | goodname = (*fieldp)->name; | |
7df2f329 MH |
982 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
983 | fieldp = &(*fieldp)->next; | |
984 | } | |
985 | } while (tmp); | |
02b95dad MH |
986 | (*fieldp)->name = strdup(str); |
987 | if ((*fieldp)->name == NULL) | |
988 | return -ENOMEM; | |
b2a3c12b MH |
989 | if (*str != '[') |
990 | goodname = (*fieldp)->name; | |
7df2f329 | 991 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 992 | |
b2a3c12b | 993 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 994 | if (!arg->name) { |
b2a3c12b | 995 | arg->name = strdup(goodname); |
02b95dad MH |
996 | if (arg->name == NULL) |
997 | return -ENOMEM; | |
998 | } | |
146a1439 | 999 | return 0; |
7df2f329 MH |
1000 | } |
1001 | ||
4235b045 | 1002 | /* Parse perf-probe event command */ |
146a1439 | 1003 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1004 | { |
e1c01d61 | 1005 | char **argv; |
146a1439 | 1006 | int argc, i, ret = 0; |
fac13fd5 | 1007 | |
4235b045 | 1008 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1009 | if (!argv) { |
1010 | pr_debug("Failed to split arguments.\n"); | |
1011 | return -ENOMEM; | |
1012 | } | |
1013 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1014 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1015 | ret = -ERANGE; | |
1016 | goto out; | |
1017 | } | |
50656eec | 1018 | /* Parse probe point */ |
146a1439 MH |
1019 | ret = parse_perf_probe_point(argv[0], pev); |
1020 | if (ret < 0) | |
1021 | goto out; | |
50656eec | 1022 | |
e1c01d61 | 1023 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1024 | pev->nargs = argc - 1; |
e334016f MH |
1025 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1026 | if (pev->args == NULL) { | |
1027 | ret = -ENOMEM; | |
1028 | goto out; | |
1029 | } | |
146a1439 MH |
1030 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1031 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1032 | if (ret >= 0 && | |
1033 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1034 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1035 | " kretprobe.\n"); |
1036 | ret = -EINVAL; | |
1037 | } | |
e1c01d61 | 1038 | } |
146a1439 | 1039 | out: |
e1c01d61 | 1040 | argv_free(argv); |
146a1439 MH |
1041 | |
1042 | return ret; | |
50656eec MH |
1043 | } |
1044 | ||
4235b045 MH |
1045 | /* Return true if this perf_probe_event requires debuginfo */ |
1046 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1047 | { | |
1048 | int i; | |
1049 | ||
1050 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
1051 | return true; | |
1052 | ||
1053 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 1054 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
1055 | return true; |
1056 | ||
1057 | return false; | |
1058 | } | |
1059 | ||
0e60836b SD |
1060 | /* Parse probe_events event into struct probe_point */ |
1061 | static int parse_probe_trace_command(const char *cmd, | |
190b57fc | 1062 | struct probe_trace_event *tev) |
4de189fe | 1063 | { |
0e60836b | 1064 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1065 | char pr; |
1066 | char *p; | |
1067 | int ret, i, argc; | |
1068 | char **argv; | |
1069 | ||
0e60836b | 1070 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1071 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1072 | if (!argv) { |
1073 | pr_debug("Failed to split arguments.\n"); | |
1074 | return -ENOMEM; | |
1075 | } | |
1076 | if (argc < 2) { | |
1077 | semantic_error("Too few probe arguments.\n"); | |
1078 | ret = -ERANGE; | |
1079 | goto out; | |
1080 | } | |
4de189fe MH |
1081 | |
1082 | /* Scan event and group name. */ | |
93aaa45a | 1083 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
1084 | &pr, (float *)(void *)&tev->group, |
1085 | (float *)(void *)&tev->event); | |
146a1439 MH |
1086 | if (ret != 3) { |
1087 | semantic_error("Failed to parse event name: %s\n", argv[0]); | |
1088 | ret = -EINVAL; | |
1089 | goto out; | |
1090 | } | |
4235b045 | 1091 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1092 | |
4235b045 | 1093 | tp->retprobe = (pr == 'r'); |
4de189fe | 1094 | |
190b57fc MH |
1095 | /* Scan module name(if there), function name and offset */ |
1096 | p = strchr(argv[1], ':'); | |
1097 | if (p) { | |
1098 | tp->module = strndup(argv[1], p - argv[1]); | |
1099 | p++; | |
1100 | } else | |
1101 | p = argv[1]; | |
1102 | ret = sscanf(p, "%a[^+]+%lu", (float *)(void *)&tp->symbol, | |
4235b045 | 1103 | &tp->offset); |
4de189fe | 1104 | if (ret == 1) |
4235b045 | 1105 | tp->offset = 0; |
4de189fe | 1106 | |
4235b045 | 1107 | tev->nargs = argc - 2; |
0e60836b | 1108 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1109 | if (tev->args == NULL) { |
1110 | ret = -ENOMEM; | |
1111 | goto out; | |
1112 | } | |
4235b045 | 1113 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1114 | p = strchr(argv[i + 2], '='); |
1115 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1116 | *p++ = '\0'; |
1117 | else | |
1118 | p = argv[i + 2]; | |
02b95dad | 1119 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1120 | /* TODO: parse regs and offset */ |
02b95dad MH |
1121 | tev->args[i].value = strdup(p); |
1122 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1123 | ret = -ENOMEM; | |
1124 | goto out; | |
1125 | } | |
4de189fe | 1126 | } |
146a1439 MH |
1127 | ret = 0; |
1128 | out: | |
4de189fe | 1129 | argv_free(argv); |
146a1439 | 1130 | return ret; |
4de189fe MH |
1131 | } |
1132 | ||
7df2f329 MH |
1133 | /* Compose only probe arg */ |
1134 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
1135 | { | |
1136 | struct perf_probe_arg_field *field = pa->field; | |
1137 | int ret; | |
1138 | char *tmp = buf; | |
1139 | ||
48481938 MH |
1140 | if (pa->name && pa->var) |
1141 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
1142 | else | |
1143 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
1144 | if (ret <= 0) |
1145 | goto error; | |
1146 | tmp += ret; | |
1147 | len -= ret; | |
1148 | ||
1149 | while (field) { | |
b2a3c12b MH |
1150 | if (field->name[0] == '[') |
1151 | ret = e_snprintf(tmp, len, "%s", field->name); | |
1152 | else | |
1153 | ret = e_snprintf(tmp, len, "%s%s", | |
1154 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
1155 | if (ret <= 0) |
1156 | goto error; | |
1157 | tmp += ret; | |
1158 | len -= ret; | |
1159 | field = field->next; | |
1160 | } | |
11a1ca35 MH |
1161 | |
1162 | if (pa->type) { | |
1163 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
1164 | if (ret <= 0) | |
1165 | goto error; | |
1166 | tmp += ret; | |
1167 | len -= ret; | |
1168 | } | |
1169 | ||
7df2f329 MH |
1170 | return tmp - buf; |
1171 | error: | |
0e43e5d2 | 1172 | pr_debug("Failed to synthesize perf probe argument: %s\n", |
146a1439 MH |
1173 | strerror(-ret)); |
1174 | return ret; | |
7df2f329 MH |
1175 | } |
1176 | ||
4235b045 MH |
1177 | /* Compose only probe point (not argument) */ |
1178 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1179 | { |
fb1587d8 MH |
1180 | char *buf, *tmp; |
1181 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1182 | int ret, len; | |
4de189fe | 1183 | |
e334016f MH |
1184 | buf = zalloc(MAX_CMDLEN); |
1185 | if (buf == NULL) { | |
1186 | ret = -ENOMEM; | |
1187 | goto error; | |
1188 | } | |
4de189fe | 1189 | if (pp->offset) { |
fb1587d8 | 1190 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1191 | if (ret <= 0) |
1192 | goto error; | |
1193 | } | |
1194 | if (pp->line) { | |
fb1587d8 MH |
1195 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1196 | if (ret <= 0) | |
1197 | goto error; | |
1198 | } | |
1199 | if (pp->file) { | |
32ae2ade FBH |
1200 | tmp = pp->file; |
1201 | len = strlen(tmp); | |
1202 | if (len > 30) { | |
1203 | tmp = strchr(pp->file + len - 30, '/'); | |
1204 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1205 | } | |
1206 | ret = e_snprintf(file, 32, "@%s", tmp); | |
4de189fe MH |
1207 | if (ret <= 0) |
1208 | goto error; | |
1209 | } | |
1210 | ||
1211 | if (pp->function) | |
fb1587d8 MH |
1212 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1213 | offs, pp->retprobe ? "%return" : "", line, | |
1214 | file); | |
4de189fe | 1215 | else |
fb1587d8 | 1216 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1217 | if (ret <= 0) |
1218 | goto error; | |
1219 | ||
1220 | return buf; | |
7ef17aaf | 1221 | error: |
0e43e5d2 | 1222 | pr_debug("Failed to synthesize perf probe point: %s\n", |
146a1439 | 1223 | strerror(-ret)); |
e334016f MH |
1224 | if (buf) |
1225 | free(buf); | |
146a1439 | 1226 | return NULL; |
7ef17aaf MH |
1227 | } |
1228 | ||
4235b045 MH |
1229 | #if 0 |
1230 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1231 | { |
1232 | char *buf; | |
1233 | int i, len, ret; | |
1234 | ||
4235b045 MH |
1235 | buf = synthesize_perf_probe_point(&pev->point); |
1236 | if (!buf) | |
1237 | return NULL; | |
4de189fe | 1238 | |
4235b045 MH |
1239 | len = strlen(buf); |
1240 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1241 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1242 | pev->args[i].name); |
1243 | if (ret <= 0) { | |
1244 | free(buf); | |
1245 | return NULL; | |
1246 | } | |
4de189fe MH |
1247 | len += ret; |
1248 | } | |
4de189fe | 1249 | |
4235b045 MH |
1250 | return buf; |
1251 | } | |
1252 | #endif | |
1253 | ||
0e60836b | 1254 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1255 | char **buf, size_t *buflen, |
1256 | int depth) | |
1257 | { | |
1258 | int ret; | |
1259 | if (ref->next) { | |
0e60836b | 1260 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1261 | buflen, depth + 1); |
1262 | if (depth < 0) | |
1263 | goto out; | |
1264 | } | |
1265 | ||
1266 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1267 | if (ret < 0) | |
1268 | depth = ret; | |
1269 | else { | |
1270 | *buf += ret; | |
1271 | *buflen -= ret; | |
1272 | } | |
1273 | out: | |
1274 | return depth; | |
4de189fe | 1275 | |
4de189fe MH |
1276 | } |
1277 | ||
0e60836b | 1278 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1279 | char *buf, size_t buflen) |
50656eec | 1280 | { |
0e60836b | 1281 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1282 | int ret, depth = 0; |
1283 | char *tmp = buf; | |
1284 | ||
1285 | /* Argument name or separator */ | |
1286 | if (arg->name) | |
1287 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1288 | else | |
1289 | ret = e_snprintf(buf, buflen, " "); | |
1290 | if (ret < 0) | |
1291 | return ret; | |
1292 | buf += ret; | |
1293 | buflen -= ret; | |
1294 | ||
b7dcb857 MH |
1295 | /* Special case: @XXX */ |
1296 | if (arg->value[0] == '@' && arg->ref) | |
1297 | ref = ref->next; | |
1298 | ||
4235b045 | 1299 | /* Dereferencing arguments */ |
b7dcb857 | 1300 | if (ref) { |
0e60836b | 1301 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1302 | &buflen, 1); |
1303 | if (depth < 0) | |
1304 | return depth; | |
1305 | } | |
1306 | ||
1307 | /* Print argument value */ | |
b7dcb857 MH |
1308 | if (arg->value[0] == '@' && arg->ref) |
1309 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1310 | arg->ref->offset); | |
1311 | else | |
1312 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1313 | if (ret < 0) |
1314 | return ret; | |
1315 | buf += ret; | |
1316 | buflen -= ret; | |
1317 | ||
1318 | /* Closing */ | |
1319 | while (depth--) { | |
1320 | ret = e_snprintf(buf, buflen, ")"); | |
1321 | if (ret < 0) | |
1322 | return ret; | |
1323 | buf += ret; | |
1324 | buflen -= ret; | |
1325 | } | |
4984912e MH |
1326 | /* Print argument type */ |
1327 | if (arg->type) { | |
1328 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1329 | if (ret <= 0) | |
1330 | return ret; | |
1331 | buf += ret; | |
1332 | } | |
4235b045 MH |
1333 | |
1334 | return buf - tmp; | |
1335 | } | |
1336 | ||
0e60836b | 1337 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1338 | { |
0e60836b | 1339 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1340 | char *buf; |
1341 | int i, len, ret; | |
1342 | ||
e334016f MH |
1343 | buf = zalloc(MAX_CMDLEN); |
1344 | if (buf == NULL) | |
1345 | return NULL; | |
1346 | ||
190b57fc | 1347 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s%s%s+%lu", |
4235b045 MH |
1348 | tp->retprobe ? 'r' : 'p', |
1349 | tev->group, tev->event, | |
190b57fc | 1350 | tp->module ?: "", tp->module ? ":" : "", |
4235b045 MH |
1351 | tp->symbol, tp->offset); |
1352 | if (len <= 0) | |
50656eec | 1353 | goto error; |
50656eec | 1354 | |
4235b045 | 1355 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1356 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1357 | MAX_CMDLEN - len); |
4de189fe | 1358 | if (ret <= 0) |
50656eec MH |
1359 | goto error; |
1360 | len += ret; | |
1361 | } | |
50656eec | 1362 | |
4235b045 | 1363 | return buf; |
50656eec | 1364 | error: |
4235b045 MH |
1365 | free(buf); |
1366 | return NULL; | |
1367 | } | |
50656eec | 1368 | |
0e60836b | 1369 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
469b9b88 | 1370 | struct perf_probe_event *pev) |
4235b045 | 1371 | { |
02b95dad | 1372 | char buf[64] = ""; |
146a1439 | 1373 | int i, ret; |
4235b045 | 1374 | |
4b4da7f7 | 1375 | /* Convert event/group name */ |
02b95dad MH |
1376 | pev->event = strdup(tev->event); |
1377 | pev->group = strdup(tev->group); | |
1378 | if (pev->event == NULL || pev->group == NULL) | |
1379 | return -ENOMEM; | |
fb1587d8 | 1380 | |
4b4da7f7 | 1381 | /* Convert trace_point to probe_point */ |
0e60836b | 1382 | ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); |
146a1439 MH |
1383 | if (ret < 0) |
1384 | return ret; | |
4b4da7f7 | 1385 | |
4235b045 MH |
1386 | /* Convert trace_arg to probe_arg */ |
1387 | pev->nargs = tev->nargs; | |
e334016f MH |
1388 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1389 | if (pev->args == NULL) | |
1390 | return -ENOMEM; | |
02b95dad | 1391 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1392 | if (tev->args[i].name) |
02b95dad | 1393 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1394 | else { |
0e60836b | 1395 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1396 | buf, 64); |
02b95dad | 1397 | pev->args[i].name = strdup(buf); |
4235b045 | 1398 | } |
02b95dad MH |
1399 | if (pev->args[i].name == NULL && ret >= 0) |
1400 | ret = -ENOMEM; | |
1401 | } | |
146a1439 MH |
1402 | |
1403 | if (ret < 0) | |
1404 | clear_perf_probe_event(pev); | |
1405 | ||
1406 | return ret; | |
4235b045 MH |
1407 | } |
1408 | ||
1409 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1410 | { | |
1411 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1412 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1413 | int i; |
1414 | ||
1415 | if (pev->event) | |
1416 | free(pev->event); | |
1417 | if (pev->group) | |
1418 | free(pev->group); | |
1419 | if (pp->file) | |
1420 | free(pp->file); | |
1421 | if (pp->function) | |
1422 | free(pp->function); | |
1423 | if (pp->lazy_line) | |
1424 | free(pp->lazy_line); | |
7df2f329 | 1425 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1426 | if (pev->args[i].name) |
1427 | free(pev->args[i].name); | |
48481938 MH |
1428 | if (pev->args[i].var) |
1429 | free(pev->args[i].var); | |
11a1ca35 MH |
1430 | if (pev->args[i].type) |
1431 | free(pev->args[i].type); | |
7df2f329 MH |
1432 | field = pev->args[i].field; |
1433 | while (field) { | |
1434 | next = field->next; | |
1435 | if (field->name) | |
1436 | free(field->name); | |
1437 | free(field); | |
1438 | field = next; | |
1439 | } | |
1440 | } | |
4235b045 MH |
1441 | if (pev->args) |
1442 | free(pev->args); | |
1443 | memset(pev, 0, sizeof(*pev)); | |
1444 | } | |
1445 | ||
0e60836b | 1446 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1447 | { |
0e60836b | 1448 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1449 | int i; |
1450 | ||
1451 | if (tev->event) | |
1452 | free(tev->event); | |
1453 | if (tev->group) | |
1454 | free(tev->group); | |
1455 | if (tev->point.symbol) | |
1456 | free(tev->point.symbol); | |
190b57fc MH |
1457 | if (tev->point.module) |
1458 | free(tev->point.module); | |
4235b045 MH |
1459 | for (i = 0; i < tev->nargs; i++) { |
1460 | if (tev->args[i].name) | |
1461 | free(tev->args[i].name); | |
1462 | if (tev->args[i].value) | |
1463 | free(tev->args[i].value); | |
4984912e MH |
1464 | if (tev->args[i].type) |
1465 | free(tev->args[i].type); | |
4235b045 MH |
1466 | ref = tev->args[i].ref; |
1467 | while (ref) { | |
1468 | next = ref->next; | |
1469 | free(ref); | |
1470 | ref = next; | |
1471 | } | |
1472 | } | |
1473 | if (tev->args) | |
1474 | free(tev->args); | |
1475 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1476 | } |
1477 | ||
f4d7da49 | 1478 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
1479 | { |
1480 | char buf[PATH_MAX]; | |
7ca5989d | 1481 | const char *__debugfs; |
4de189fe MH |
1482 | int ret; |
1483 | ||
7ca5989d MH |
1484 | __debugfs = debugfs_find_mountpoint(); |
1485 | if (__debugfs == NULL) { | |
1486 | pr_warning("Debugfs is not mounted.\n"); | |
1487 | return -ENOENT; | |
1488 | } | |
1489 | ||
1490 | ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); | |
146a1439 | 1491 | if (ret >= 0) { |
7ca5989d | 1492 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1493 | if (readwrite && !probe_event_dry_run) |
1494 | ret = open(buf, O_RDWR, O_APPEND); | |
1495 | else | |
1496 | ret = open(buf, O_RDONLY, 0); | |
1497 | } | |
f4d7da49 | 1498 | |
4de189fe MH |
1499 | if (ret < 0) { |
1500 | if (errno == ENOENT) | |
146a1439 MH |
1501 | pr_warning("kprobe_events file does not exist - please" |
1502 | " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); | |
4de189fe | 1503 | else |
146a1439 MH |
1504 | pr_warning("Failed to open kprobe_events file: %s\n", |
1505 | strerror(errno)); | |
4de189fe MH |
1506 | } |
1507 | return ret; | |
1508 | } | |
1509 | ||
1510 | /* Get raw string list of current kprobe_events */ | |
0e60836b | 1511 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1512 | { |
1513 | int ret, idx; | |
1514 | FILE *fp; | |
1515 | char buf[MAX_CMDLEN]; | |
1516 | char *p; | |
1517 | struct strlist *sl; | |
1518 | ||
1519 | sl = strlist__new(true, NULL); | |
1520 | ||
1521 | fp = fdopen(dup(fd), "r"); | |
1522 | while (!feof(fp)) { | |
1523 | p = fgets(buf, MAX_CMDLEN, fp); | |
1524 | if (!p) | |
1525 | break; | |
1526 | ||
1527 | idx = strlen(p) - 1; | |
1528 | if (p[idx] == '\n') | |
1529 | p[idx] = '\0'; | |
1530 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1531 | if (ret < 0) { |
1532 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1533 | strlist__delete(sl); | |
1534 | return NULL; | |
1535 | } | |
4de189fe MH |
1536 | } |
1537 | fclose(fp); | |
1538 | ||
1539 | return sl; | |
1540 | } | |
1541 | ||
278498d4 | 1542 | /* Show an event */ |
146a1439 | 1543 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1544 | { |
7e990a51 | 1545 | int i, ret; |
278498d4 | 1546 | char buf[128]; |
4235b045 | 1547 | char *place; |
278498d4 | 1548 | |
4235b045 MH |
1549 | /* Synthesize only event probe point */ |
1550 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1551 | if (!place) |
1552 | return -EINVAL; | |
4235b045 MH |
1553 | |
1554 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1555 | if (ret < 0) |
146a1439 MH |
1556 | return ret; |
1557 | ||
fb1587d8 | 1558 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1559 | |
4235b045 | 1560 | if (pev->nargs > 0) { |
278498d4 | 1561 | printf(" with"); |
7df2f329 | 1562 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1563 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1564 | buf, 128); | |
1565 | if (ret < 0) | |
1566 | break; | |
7df2f329 MH |
1567 | printf(" %s", buf); |
1568 | } | |
278498d4 MH |
1569 | } |
1570 | printf(")\n"); | |
4235b045 | 1571 | free(place); |
146a1439 | 1572 | return ret; |
278498d4 MH |
1573 | } |
1574 | ||
4de189fe | 1575 | /* List up current perf-probe events */ |
146a1439 | 1576 | int show_perf_probe_events(void) |
4de189fe | 1577 | { |
146a1439 | 1578 | int fd, ret; |
0e60836b | 1579 | struct probe_trace_event tev; |
4235b045 | 1580 | struct perf_probe_event pev; |
4de189fe MH |
1581 | struct strlist *rawlist; |
1582 | struct str_node *ent; | |
1583 | ||
72041334 | 1584 | setup_pager(); |
146a1439 MH |
1585 | ret = init_vmlinux(); |
1586 | if (ret < 0) | |
1587 | return ret; | |
4235b045 MH |
1588 | |
1589 | memset(&tev, 0, sizeof(tev)); | |
1590 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1591 | |
f4d7da49 | 1592 | fd = open_kprobe_events(false); |
146a1439 MH |
1593 | if (fd < 0) |
1594 | return fd; | |
1595 | ||
0e60836b | 1596 | rawlist = get_probe_trace_command_rawlist(fd); |
4de189fe | 1597 | close(fd); |
146a1439 MH |
1598 | if (!rawlist) |
1599 | return -ENOENT; | |
4de189fe | 1600 | |
adf365f4 | 1601 | strlist__for_each(ent, rawlist) { |
0e60836b | 1602 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1603 | if (ret >= 0) { |
1604 | ret = convert_to_perf_probe_event(&tev, &pev); | |
1605 | if (ret >= 0) | |
1606 | ret = show_perf_probe_event(&pev); | |
1607 | } | |
4235b045 | 1608 | clear_perf_probe_event(&pev); |
0e60836b | 1609 | clear_probe_trace_event(&tev); |
146a1439 MH |
1610 | if (ret < 0) |
1611 | break; | |
4de189fe | 1612 | } |
4de189fe | 1613 | strlist__delete(rawlist); |
146a1439 MH |
1614 | |
1615 | return ret; | |
4de189fe MH |
1616 | } |
1617 | ||
b498ce1f | 1618 | /* Get current perf-probe event names */ |
0e60836b | 1619 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1620 | { |
fa28244d | 1621 | char buf[128]; |
b498ce1f MH |
1622 | struct strlist *sl, *rawlist; |
1623 | struct str_node *ent; | |
0e60836b | 1624 | struct probe_trace_event tev; |
146a1439 | 1625 | int ret = 0; |
b498ce1f | 1626 | |
4235b045 | 1627 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 1628 | rawlist = get_probe_trace_command_rawlist(fd); |
e1d2017b | 1629 | sl = strlist__new(true, NULL); |
adf365f4 | 1630 | strlist__for_each(ent, rawlist) { |
0e60836b | 1631 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1632 | if (ret < 0) |
1633 | break; | |
fa28244d | 1634 | if (include_group) { |
146a1439 MH |
1635 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1636 | tev.event); | |
1637 | if (ret >= 0) | |
1638 | ret = strlist__add(sl, buf); | |
fa28244d | 1639 | } else |
146a1439 | 1640 | ret = strlist__add(sl, tev.event); |
0e60836b | 1641 | clear_probe_trace_event(&tev); |
146a1439 MH |
1642 | if (ret < 0) |
1643 | break; | |
b498ce1f | 1644 | } |
b498ce1f MH |
1645 | strlist__delete(rawlist); |
1646 | ||
146a1439 MH |
1647 | if (ret < 0) { |
1648 | strlist__delete(sl); | |
1649 | return NULL; | |
1650 | } | |
b498ce1f MH |
1651 | return sl; |
1652 | } | |
1653 | ||
0e60836b | 1654 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 1655 | { |
6eca8cc3 | 1656 | int ret = 0; |
0e60836b | 1657 | char *buf = synthesize_probe_trace_command(tev); |
50656eec | 1658 | |
146a1439 | 1659 | if (!buf) { |
0e60836b | 1660 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
1661 | return -EINVAL; |
1662 | } | |
1663 | ||
fa28244d | 1664 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1665 | if (!probe_event_dry_run) { |
1666 | ret = write(fd, buf, strlen(buf)); | |
1667 | if (ret <= 0) | |
146a1439 MH |
1668 | pr_warning("Failed to write event: %s\n", |
1669 | strerror(errno)); | |
f4d7da49 | 1670 | } |
4235b045 | 1671 | free(buf); |
146a1439 | 1672 | return ret; |
50656eec MH |
1673 | } |
1674 | ||
146a1439 MH |
1675 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1676 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1677 | { |
1678 | int i, ret; | |
17f88fcd MH |
1679 | |
1680 | /* Try no suffix */ | |
1681 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1682 | if (ret < 0) { |
1683 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1684 | return ret; | |
1685 | } | |
17f88fcd | 1686 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1687 | return 0; |
17f88fcd | 1688 | |
d761b08b MH |
1689 | if (!allow_suffix) { |
1690 | pr_warning("Error: event \"%s\" already exists. " | |
1691 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1692 | return -EEXIST; |
d761b08b MH |
1693 | } |
1694 | ||
17f88fcd MH |
1695 | /* Try to add suffix */ |
1696 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1697 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1698 | if (ret < 0) { |
1699 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1700 | return ret; | |
1701 | } | |
b498ce1f MH |
1702 | if (!strlist__has_entry(namelist, buf)) |
1703 | break; | |
1704 | } | |
146a1439 MH |
1705 | if (i == MAX_EVENT_INDEX) { |
1706 | pr_warning("Too many events are on the same function.\n"); | |
1707 | ret = -ERANGE; | |
1708 | } | |
1709 | ||
1710 | return ret; | |
b498ce1f MH |
1711 | } |
1712 | ||
0e60836b SD |
1713 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
1714 | struct probe_trace_event *tevs, | |
146a1439 | 1715 | int ntevs, bool allow_suffix) |
50656eec | 1716 | { |
146a1439 | 1717 | int i, fd, ret; |
0e60836b | 1718 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
1719 | char buf[64]; |
1720 | const char *event, *group; | |
b498ce1f | 1721 | struct strlist *namelist; |
50656eec | 1722 | |
f4d7da49 | 1723 | fd = open_kprobe_events(true); |
146a1439 MH |
1724 | if (fd < 0) |
1725 | return fd; | |
b498ce1f | 1726 | /* Get current event names */ |
0e60836b | 1727 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
1728 | if (!namelist) { |
1729 | pr_debug("Failed to get current event list.\n"); | |
1730 | return -EIO; | |
1731 | } | |
4235b045 | 1732 | |
146a1439 | 1733 | ret = 0; |
4235b045 | 1734 | printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1735 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1736 | tev = &tevs[i]; |
1737 | if (pev->event) | |
1738 | event = pev->event; | |
1739 | else | |
1740 | if (pev->point.function) | |
1741 | event = pev->point.function; | |
1742 | else | |
1743 | event = tev->point.symbol; | |
1744 | if (pev->group) | |
1745 | group = pev->group; | |
1746 | else | |
1747 | group = PERFPROBE_GROUP; | |
1748 | ||
1749 | /* Get an unused new event name */ | |
146a1439 MH |
1750 | ret = get_new_event_name(buf, 64, event, |
1751 | namelist, allow_suffix); | |
1752 | if (ret < 0) | |
1753 | break; | |
4235b045 MH |
1754 | event = buf; |
1755 | ||
02b95dad MH |
1756 | tev->event = strdup(event); |
1757 | tev->group = strdup(group); | |
1758 | if (tev->event == NULL || tev->group == NULL) { | |
1759 | ret = -ENOMEM; | |
1760 | break; | |
1761 | } | |
0e60836b | 1762 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
1763 | if (ret < 0) |
1764 | break; | |
4235b045 MH |
1765 | /* Add added event name to namelist */ |
1766 | strlist__add(namelist, event); | |
1767 | ||
1768 | /* Trick here - save current event/group */ | |
1769 | event = pev->event; | |
1770 | group = pev->group; | |
1771 | pev->event = tev->event; | |
1772 | pev->group = tev->group; | |
1773 | show_perf_probe_event(pev); | |
1774 | /* Trick here - restore current event/group */ | |
1775 | pev->event = (char *)event; | |
1776 | pev->group = (char *)group; | |
1777 | ||
1778 | /* | |
1779 | * Probes after the first probe which comes from same | |
1780 | * user input are always allowed to add suffix, because | |
1781 | * there might be several addresses corresponding to | |
1782 | * one code line. | |
1783 | */ | |
1784 | allow_suffix = true; | |
50656eec | 1785 | } |
146a1439 MH |
1786 | |
1787 | if (ret >= 0) { | |
1788 | /* Show how to use the event. */ | |
1789 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
1790 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
1791 | tev->event); | |
1792 | } | |
a9b495b0 | 1793 | |
e1d2017b | 1794 | strlist__delete(namelist); |
50656eec | 1795 | close(fd); |
146a1439 | 1796 | return ret; |
50656eec | 1797 | } |
fa28244d | 1798 | |
0e60836b SD |
1799 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
1800 | struct probe_trace_event **tevs, | |
469b9b88 | 1801 | int max_tevs, const char *module) |
e0faa8d3 MH |
1802 | { |
1803 | struct symbol *sym; | |
e334016f | 1804 | int ret = 0, i; |
0e60836b | 1805 | struct probe_trace_event *tev; |
4235b045 | 1806 | |
4b4da7f7 | 1807 | /* Convert perf_probe_event with debuginfo */ |
469b9b88 | 1808 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, module); |
e334016f | 1809 | if (ret != 0) |
190b57fc | 1810 | return ret; /* Found in debuginfo or got an error */ |
e0faa8d3 | 1811 | |
4235b045 | 1812 | /* Allocate trace event buffer */ |
0e60836b | 1813 | tev = *tevs = zalloc(sizeof(struct probe_trace_event)); |
e334016f MH |
1814 | if (tev == NULL) |
1815 | return -ENOMEM; | |
4235b045 MH |
1816 | |
1817 | /* Copy parameters */ | |
02b95dad MH |
1818 | tev->point.symbol = strdup(pev->point.function); |
1819 | if (tev->point.symbol == NULL) { | |
1820 | ret = -ENOMEM; | |
1821 | goto error; | |
1822 | } | |
ce27a443 JZ |
1823 | |
1824 | if (module) { | |
1825 | tev->point.module = strdup(module); | |
1826 | if (tev->point.module == NULL) { | |
1827 | ret = -ENOMEM; | |
1828 | goto error; | |
1829 | } | |
190b57fc | 1830 | } |
ce27a443 | 1831 | |
4235b045 | 1832 | tev->point.offset = pev->point.offset; |
04ddd04b | 1833 | tev->point.retprobe = pev->point.retprobe; |
4235b045 MH |
1834 | tev->nargs = pev->nargs; |
1835 | if (tev->nargs) { | |
0e60836b | 1836 | tev->args = zalloc(sizeof(struct probe_trace_arg) |
e334016f MH |
1837 | * tev->nargs); |
1838 | if (tev->args == NULL) { | |
02b95dad MH |
1839 | ret = -ENOMEM; |
1840 | goto error; | |
e334016f | 1841 | } |
48481938 | 1842 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1843 | if (pev->args[i].name) { |
1844 | tev->args[i].name = strdup(pev->args[i].name); | |
1845 | if (tev->args[i].name == NULL) { | |
1846 | ret = -ENOMEM; | |
1847 | goto error; | |
1848 | } | |
1849 | } | |
1850 | tev->args[i].value = strdup(pev->args[i].var); | |
1851 | if (tev->args[i].value == NULL) { | |
1852 | ret = -ENOMEM; | |
1853 | goto error; | |
1854 | } | |
1855 | if (pev->args[i].type) { | |
1856 | tev->args[i].type = strdup(pev->args[i].type); | |
1857 | if (tev->args[i].type == NULL) { | |
1858 | ret = -ENOMEM; | |
1859 | goto error; | |
1860 | } | |
1861 | } | |
48481938 | 1862 | } |
4235b045 MH |
1863 | } |
1864 | ||
1865 | /* Currently just checking function name from symbol map */ | |
469b9b88 | 1866 | sym = __find_kernel_function_by_name(tev->point.symbol, NULL); |
146a1439 MH |
1867 | if (!sym) { |
1868 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1869 | tev->point.symbol); | |
02b95dad MH |
1870 | ret = -ENOENT; |
1871 | goto error; | |
1872 | } | |
e334016f | 1873 | |
02b95dad MH |
1874 | return 1; |
1875 | error: | |
0e60836b | 1876 | clear_probe_trace_event(tev); |
02b95dad MH |
1877 | free(tev); |
1878 | *tevs = NULL; | |
e334016f | 1879 | return ret; |
4235b045 MH |
1880 | } |
1881 | ||
1882 | struct __event_package { | |
1883 | struct perf_probe_event *pev; | |
0e60836b | 1884 | struct probe_trace_event *tevs; |
4235b045 MH |
1885 | int ntevs; |
1886 | }; | |
1887 | ||
146a1439 | 1888 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
469b9b88 | 1889 | int max_tevs, const char *module, bool force_add) |
4235b045 | 1890 | { |
146a1439 | 1891 | int i, j, ret; |
4235b045 MH |
1892 | struct __event_package *pkgs; |
1893 | ||
e334016f MH |
1894 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
1895 | if (pkgs == NULL) | |
1896 | return -ENOMEM; | |
4235b045 MH |
1897 | |
1898 | /* Init vmlinux path */ | |
146a1439 | 1899 | ret = init_vmlinux(); |
449e5b24 MH |
1900 | if (ret < 0) { |
1901 | free(pkgs); | |
146a1439 | 1902 | return ret; |
449e5b24 | 1903 | } |
4235b045 MH |
1904 | |
1905 | /* Loop 1: convert all events */ | |
1906 | for (i = 0; i < npevs; i++) { | |
1907 | pkgs[i].pev = &pevs[i]; | |
1908 | /* Convert with or without debuginfo */ | |
0e60836b | 1909 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
1910 | &pkgs[i].tevs, |
1911 | max_tevs, | |
1912 | module); | |
146a1439 MH |
1913 | if (ret < 0) |
1914 | goto end; | |
1915 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
1916 | } |
1917 | ||
4235b045 | 1918 | /* Loop 2: add all events */ |
8635bf6e | 1919 | for (i = 0; i < npevs; i++) { |
0e60836b | 1920 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 | 1921 | pkgs[i].ntevs, force_add); |
fbee632d ACM |
1922 | if (ret < 0) |
1923 | break; | |
1924 | } | |
146a1439 | 1925 | end: |
449e5b24 MH |
1926 | /* Loop 3: cleanup and free trace events */ |
1927 | for (i = 0; i < npevs; i++) { | |
146a1439 | 1928 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 1929 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
449e5b24 MH |
1930 | free(pkgs[i].tevs); |
1931 | } | |
1932 | free(pkgs); | |
146a1439 MH |
1933 | |
1934 | return ret; | |
e0faa8d3 MH |
1935 | } |
1936 | ||
0e60836b | 1937 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
1938 | { |
1939 | char *p; | |
1940 | char buf[128]; | |
4235b045 | 1941 | int ret; |
bbbb521b | 1942 | |
0e60836b | 1943 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
1944 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
1945 | if (ret < 0) | |
1946 | goto error; | |
1947 | ||
bbbb521b | 1948 | p = strchr(buf + 2, ':'); |
146a1439 MH |
1949 | if (!p) { |
1950 | pr_debug("Internal error: %s should have ':' but not.\n", | |
1951 | ent->s); | |
1952 | ret = -ENOTSUP; | |
1953 | goto error; | |
1954 | } | |
bbbb521b MH |
1955 | *p = '/'; |
1956 | ||
4235b045 MH |
1957 | pr_debug("Writing event: %s\n", buf); |
1958 | ret = write(fd, buf, strlen(buf)); | |
146a1439 MH |
1959 | if (ret < 0) |
1960 | goto error; | |
1961 | ||
bbbb521b | 1962 | printf("Remove 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 | } |