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