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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 | ||
50656eec MH |
22 | #include <sys/utsname.h> |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | #include <fcntl.h> | |
26 | #include <errno.h> | |
27 | #include <stdio.h> | |
28 | #include <unistd.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
4de189fe MH |
31 | #include <stdarg.h> |
32 | #include <limits.h> | |
e80711ca | 33 | #include <elf.h> |
50656eec | 34 | |
31facc5f | 35 | #include "util.h" |
50656eec | 36 | #include "event.h" |
4de189fe | 37 | #include "strlist.h" |
50656eec | 38 | #include "debug.h" |
72041334 | 39 | #include "cache.h" |
631c9def | 40 | #include "color.h" |
e0faa8d3 MH |
41 | #include "symbol.h" |
42 | #include "thread.h" | |
7ca5989d | 43 | #include "debugfs.h" |
4b4da7f7 | 44 | #include "trace-event.h" /* For __unused */ |
50656eec | 45 | #include "probe-event.h" |
4235b045 | 46 | #include "probe-finder.h" |
50656eec MH |
47 | |
48 | #define MAX_CMDLEN 256 | |
49 | #define MAX_PROBE_ARGS 128 | |
50 | #define PERFPROBE_GROUP "probe" | |
51 | ||
f4d7da49 MH |
52 | bool probe_event_dry_run; /* Dry run flag */ |
53 | ||
146a1439 | 54 | #define semantic_error(msg ...) pr_err("Semantic error :" msg) |
50656eec | 55 | |
4de189fe | 56 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
57 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
58 | __attribute__((format(printf, 3, 4))); | |
59 | ||
4de189fe MH |
60 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
61 | { | |
62 | int ret; | |
63 | va_list ap; | |
64 | va_start(ap, format); | |
65 | ret = vsnprintf(str, size, format, ap); | |
66 | va_end(ap); | |
67 | if (ret >= (int)size) | |
68 | ret = -E2BIG; | |
69 | return ret; | |
70 | } | |
71 | ||
4b4da7f7 | 72 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp); |
d28c6223 | 73 | static struct machine machine; |
e0faa8d3 | 74 | |
469b9b88 | 75 | /* Initialize symbol maps and path of vmlinux/modules */ |
146a1439 | 76 | static int init_vmlinux(void) |
e0faa8d3 | 77 | { |
146a1439 MH |
78 | int ret; |
79 | ||
e0faa8d3 MH |
80 | symbol_conf.sort_by_name = true; |
81 | if (symbol_conf.vmlinux_name == NULL) | |
82 | symbol_conf.try_vmlinux_path = true; | |
83 | else | |
84 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
146a1439 MH |
85 | ret = symbol__init(); |
86 | if (ret < 0) { | |
87 | pr_debug("Failed to init symbol map.\n"); | |
88 | goto out; | |
89 | } | |
e0faa8d3 | 90 | |
469b9b88 | 91 | ret = machine__init(&machine, "", HOST_KERNEL_ID); |
d28c6223 ACM |
92 | if (ret < 0) |
93 | goto out; | |
94 | ||
469b9b88 | 95 | if (machine__create_kernel_maps(&machine) < 0) { |
0e43e5d2 | 96 | pr_debug("machine__create_kernel_maps() failed.\n"); |
469b9b88 MH |
97 | goto out; |
98 | } | |
146a1439 MH |
99 | out: |
100 | if (ret < 0) | |
101 | pr_warning("Failed to init vmlinux path.\n"); | |
102 | return ret; | |
e0faa8d3 MH |
103 | } |
104 | ||
469b9b88 MH |
105 | static struct symbol *__find_kernel_function_by_name(const char *name, |
106 | struct map **mapp) | |
107 | { | |
108 | return machine__find_kernel_function_by_name(&machine, name, mapp, | |
109 | NULL); | |
110 | } | |
111 | ||
e80711ca MH |
112 | static struct map *kernel_get_module_map(const char *module) |
113 | { | |
114 | struct rb_node *nd; | |
115 | struct map_groups *grp = &machine.kmaps; | |
116 | ||
14a8fd7c MH |
117 | /* A file path -- this is an offline module */ |
118 | if (module && strchr(module, '/')) | |
119 | return machine__new_module(&machine, 0, module); | |
120 | ||
e80711ca MH |
121 | if (!module) |
122 | module = "kernel"; | |
123 | ||
124 | for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) { | |
125 | struct map *pos = rb_entry(nd, struct map, rb_node); | |
126 | if (strncmp(pos->dso->short_name + 1, module, | |
127 | pos->dso->short_name_len - 2) == 0) { | |
128 | return pos; | |
129 | } | |
130 | } | |
131 | return NULL; | |
132 | } | |
133 | ||
134 | static struct dso *kernel_get_module_dso(const char *module) | |
469b9b88 MH |
135 | { |
136 | struct dso *dso; | |
fd930ff9 FBH |
137 | struct map *map; |
138 | const char *vmlinux_name; | |
469b9b88 MH |
139 | |
140 | if (module) { | |
141 | list_for_each_entry(dso, &machine.kernel_dsos, node) { | |
142 | if (strncmp(dso->short_name + 1, module, | |
143 | dso->short_name_len - 2) == 0) | |
144 | goto found; | |
145 | } | |
146 | pr_debug("Failed to find module %s.\n", module); | |
147 | return NULL; | |
fd930ff9 FBH |
148 | } |
149 | ||
150 | map = machine.vmlinux_maps[MAP__FUNCTION]; | |
151 | dso = map->dso; | |
152 | ||
153 | vmlinux_name = symbol_conf.vmlinux_name; | |
154 | if (vmlinux_name) { | |
155 | if (dso__load_vmlinux(dso, map, vmlinux_name, NULL) <= 0) | |
156 | return NULL; | |
469b9b88 | 157 | } else { |
c3a34e06 | 158 | if (dso__load_vmlinux_path(dso, map, NULL) <= 0) { |
469b9b88 MH |
159 | pr_debug("Failed to load kernel map.\n"); |
160 | return NULL; | |
161 | } | |
162 | } | |
163 | found: | |
e80711ca MH |
164 | return dso; |
165 | } | |
166 | ||
167 | const char *kernel_get_module_path(const char *module) | |
168 | { | |
169 | struct dso *dso = kernel_get_module_dso(module); | |
170 | return (dso) ? dso->long_name : NULL; | |
469b9b88 MH |
171 | } |
172 | ||
4b4da7f7 | 173 | #ifdef DWARF_SUPPORT |
ff741783 MH |
174 | /* Open new debuginfo of given module */ |
175 | static struct debuginfo *open_debuginfo(const char *module) | |
e0faa8d3 | 176 | { |
14a8fd7c | 177 | const char *path; |
ff741783 | 178 | |
14a8fd7c MH |
179 | /* A file path -- this is an offline module */ |
180 | if (module && strchr(module, '/')) | |
181 | path = module; | |
182 | else { | |
183 | path = kernel_get_module_path(module); | |
184 | ||
185 | if (!path) { | |
186 | pr_err("Failed to find path of %s module.\n", | |
187 | module ?: "kernel"); | |
188 | return NULL; | |
189 | } | |
e0faa8d3 | 190 | } |
ff741783 | 191 | return debuginfo__new(path); |
e0faa8d3 | 192 | } |
4b4da7f7 | 193 | |
0e60836b SD |
194 | /* |
195 | * Convert trace point to probe point with debuginfo | |
196 | * Currently only handles kprobes. | |
197 | */ | |
198 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, | |
469b9b88 | 199 | struct perf_probe_point *pp) |
4b4da7f7 MH |
200 | { |
201 | struct symbol *sym; | |
469b9b88 MH |
202 | struct map *map; |
203 | u64 addr; | |
204 | int ret = -ENOENT; | |
ff741783 | 205 | struct debuginfo *dinfo; |
4b4da7f7 | 206 | |
469b9b88 | 207 | sym = __find_kernel_function_by_name(tp->symbol, &map); |
4b4da7f7 | 208 | if (sym) { |
469b9b88 | 209 | addr = map->unmap_ip(map, sym->start + tp->offset); |
9486aa38 | 210 | pr_debug("try to find %s+%ld@%" PRIx64 "\n", tp->symbol, |
469b9b88 | 211 | tp->offset, addr); |
ff741783 MH |
212 | |
213 | dinfo = debuginfo__new_online_kernel(addr); | |
214 | if (dinfo) { | |
215 | ret = debuginfo__find_probe_point(dinfo, | |
216 | (unsigned long)addr, pp); | |
217 | debuginfo__delete(dinfo); | |
218 | } else { | |
219 | pr_debug("Failed to open debuginfo at 0x%" PRIx64 "\n", | |
220 | addr); | |
221 | ret = -ENOENT; | |
222 | } | |
4b4da7f7 MH |
223 | } |
224 | if (ret <= 0) { | |
146a1439 MH |
225 | pr_debug("Failed to find corresponding probes from " |
226 | "debuginfo. Use kprobe event information.\n"); | |
02b95dad MH |
227 | pp->function = strdup(tp->symbol); |
228 | if (pp->function == NULL) | |
229 | return -ENOMEM; | |
4b4da7f7 MH |
230 | pp->offset = tp->offset; |
231 | } | |
232 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
233 | |
234 | return 0; | |
4b4da7f7 MH |
235 | } |
236 | ||
190b57fc MH |
237 | static int add_module_to_probe_trace_events(struct probe_trace_event *tevs, |
238 | int ntevs, const char *module) | |
239 | { | |
14a8fd7c MH |
240 | int i, ret = 0; |
241 | char *tmp; | |
242 | ||
243 | if (!module) | |
244 | return 0; | |
245 | ||
246 | tmp = strrchr(module, '/'); | |
247 | if (tmp) { | |
248 | /* This is a module path -- get the module name */ | |
249 | module = strdup(tmp + 1); | |
250 | if (!module) | |
251 | return -ENOMEM; | |
252 | tmp = strchr(module, '.'); | |
253 | if (tmp) | |
254 | *tmp = '\0'; | |
255 | tmp = (char *)module; /* For free() */ | |
256 | } | |
257 | ||
190b57fc MH |
258 | for (i = 0; i < ntevs; i++) { |
259 | tevs[i].point.module = strdup(module); | |
14a8fd7c MH |
260 | if (!tevs[i].point.module) { |
261 | ret = -ENOMEM; | |
262 | break; | |
263 | } | |
190b57fc | 264 | } |
14a8fd7c MH |
265 | |
266 | if (tmp) | |
267 | free(tmp); | |
268 | ||
269 | return ret; | |
190b57fc MH |
270 | } |
271 | ||
4b4da7f7 | 272 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 273 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
190b57fc | 274 | struct probe_trace_event **tevs, |
4eced234 | 275 | int max_tevs, const char *target) |
4b4da7f7 MH |
276 | { |
277 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
4eced234 | 278 | struct debuginfo *dinfo = open_debuginfo(target); |
190b57fc | 279 | int ntevs, ret = 0; |
4b4da7f7 | 280 | |
ff741783 | 281 | if (!dinfo) { |
146a1439 MH |
282 | if (need_dwarf) { |
283 | pr_warning("Failed to open debuginfo file.\n"); | |
ff741783 | 284 | return -ENOENT; |
146a1439 | 285 | } |
ff741783 | 286 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
287 | return 0; |
288 | } | |
289 | ||
ff741783 MH |
290 | /* Searching trace events corresponding to a probe event */ |
291 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs); | |
292 | ||
293 | debuginfo__delete(dinfo); | |
4b4da7f7 | 294 | |
146a1439 | 295 | if (ntevs > 0) { /* Succeeded to find trace events */ |
0e60836b | 296 | pr_debug("find %d probe_trace_events.\n", ntevs); |
4eced234 | 297 | if (target) |
190b57fc | 298 | ret = add_module_to_probe_trace_events(*tevs, ntevs, |
4eced234 | 299 | target); |
190b57fc | 300 | return ret < 0 ? ret : ntevs; |
146a1439 | 301 | } |
4b4da7f7 | 302 | |
146a1439 MH |
303 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
304 | pr_warning("Probe point '%s' not found.\n", | |
305 | synthesize_perf_probe_point(&pev->point)); | |
306 | return -ENOENT; | |
307 | } | |
308 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
309 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
310 | if (ntevs == -EBADF) { | |
311 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
312 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
313 | if (!need_dwarf) { | |
0e43e5d2 | 314 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
315 | return 0; |
316 | } | |
4b4da7f7 | 317 | } |
15eca306 | 318 | return ntevs; |
4b4da7f7 MH |
319 | } |
320 | ||
7cf0b79e MH |
321 | /* |
322 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
323 | * and chop off leading directories that do not exist. Result is passed back as | |
324 | * a newly allocated path on success. | |
325 | * Return 0 if file was found and readable, -errno otherwise. | |
326 | */ | |
6a330a3c MH |
327 | static int get_real_path(const char *raw_path, const char *comp_dir, |
328 | char **new_path) | |
7cf0b79e | 329 | { |
6a330a3c MH |
330 | const char *prefix = symbol_conf.source_prefix; |
331 | ||
332 | if (!prefix) { | |
333 | if (raw_path[0] != '/' && comp_dir) | |
334 | /* If not an absolute path, try to use comp_dir */ | |
335 | prefix = comp_dir; | |
336 | else { | |
337 | if (access(raw_path, R_OK) == 0) { | |
338 | *new_path = strdup(raw_path); | |
339 | return 0; | |
340 | } else | |
341 | return -errno; | |
342 | } | |
7cf0b79e MH |
343 | } |
344 | ||
6a330a3c | 345 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
7cf0b79e MH |
346 | if (!*new_path) |
347 | return -ENOMEM; | |
348 | ||
349 | for (;;) { | |
6a330a3c | 350 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
7cf0b79e MH |
351 | |
352 | if (access(*new_path, R_OK) == 0) | |
353 | return 0; | |
354 | ||
6a330a3c MH |
355 | if (!symbol_conf.source_prefix) |
356 | /* In case of searching comp_dir, don't retry */ | |
357 | return -errno; | |
358 | ||
7cf0b79e MH |
359 | switch (errno) { |
360 | case ENAMETOOLONG: | |
361 | case ENOENT: | |
362 | case EROFS: | |
363 | case EFAULT: | |
364 | raw_path = strchr(++raw_path, '/'); | |
365 | if (!raw_path) { | |
366 | free(*new_path); | |
367 | *new_path = NULL; | |
368 | return -ENOENT; | |
369 | } | |
370 | continue; | |
371 | ||
372 | default: | |
373 | free(*new_path); | |
374 | *new_path = NULL; | |
375 | return -errno; | |
376 | } | |
377 | } | |
378 | } | |
379 | ||
4b4da7f7 MH |
380 | #define LINEBUF_SIZE 256 |
381 | #define NR_ADDITIONAL_LINES 2 | |
382 | ||
fde52dbd | 383 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
384 | { |
385 | char buf[LINEBUF_SIZE]; | |
befe3414 FBH |
386 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
387 | const char *prefix = NULL; | |
4b4da7f7 | 388 | |
befe3414 | 389 | do { |
4b4da7f7 MH |
390 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
391 | goto error; | |
befe3414 FBH |
392 | if (skip) |
393 | continue; | |
394 | if (!prefix) { | |
395 | prefix = show_num ? "%7d " : " "; | |
396 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 397 | } |
befe3414 FBH |
398 | color_fprintf(stdout, color, "%s", buf); |
399 | ||
400 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 401 | |
fde52dbd | 402 | return 1; |
4b4da7f7 | 403 | error: |
fde52dbd | 404 | if (ferror(fp)) { |
32b2b6ec | 405 | pr_warning("File read error: %s\n", strerror(errno)); |
fde52dbd FBH |
406 | return -1; |
407 | } | |
408 | return 0; | |
409 | } | |
146a1439 | 410 | |
fde52dbd FBH |
411 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
412 | { | |
413 | int rv = __show_one_line(fp, l, skip, show_num); | |
414 | if (rv == 0) { | |
415 | pr_warning("Source file is shorter than expected.\n"); | |
416 | rv = -1; | |
417 | } | |
418 | return rv; | |
4b4da7f7 MH |
419 | } |
420 | ||
fde52dbd FBH |
421 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
422 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
423 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
424 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
425 | ||
4b4da7f7 MH |
426 | /* |
427 | * Show line-range always requires debuginfo to find source file and | |
428 | * line number. | |
429 | */ | |
469b9b88 | 430 | int show_line_range(struct line_range *lr, const char *module) |
4b4da7f7 | 431 | { |
d3b63d7a | 432 | int l = 1; |
4b4da7f7 | 433 | struct line_node *ln; |
ff741783 | 434 | struct debuginfo *dinfo; |
4b4da7f7 | 435 | FILE *fp; |
ff741783 | 436 | int ret; |
7cf0b79e | 437 | char *tmp; |
4b4da7f7 MH |
438 | |
439 | /* Search a line range */ | |
146a1439 MH |
440 | ret = init_vmlinux(); |
441 | if (ret < 0) | |
442 | return ret; | |
443 | ||
ff741783 MH |
444 | dinfo = open_debuginfo(module); |
445 | if (!dinfo) { | |
146a1439 | 446 | pr_warning("Failed to open debuginfo file.\n"); |
ff741783 | 447 | return -ENOENT; |
146a1439 MH |
448 | } |
449 | ||
ff741783 MH |
450 | ret = debuginfo__find_line_range(dinfo, lr); |
451 | debuginfo__delete(dinfo); | |
146a1439 MH |
452 | if (ret == 0) { |
453 | pr_warning("Specified source line is not found.\n"); | |
454 | return -ENOENT; | |
455 | } else if (ret < 0) { | |
456 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
457 | return ret; | |
458 | } | |
4b4da7f7 | 459 | |
7cf0b79e MH |
460 | /* Convert source file path */ |
461 | tmp = lr->path; | |
6a330a3c | 462 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
7cf0b79e MH |
463 | free(tmp); /* Free old path */ |
464 | if (ret < 0) { | |
465 | pr_warning("Failed to find source file. (%d)\n", ret); | |
466 | return ret; | |
467 | } | |
468 | ||
4b4da7f7 MH |
469 | setup_pager(); |
470 | ||
471 | if (lr->function) | |
8737ebde | 472 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
473 | lr->start - lr->offset); |
474 | else | |
62c15fc4 | 475 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
476 | |
477 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
478 | if (fp == NULL) { |
479 | pr_warning("Failed to open %s: %s\n", lr->path, | |
480 | strerror(errno)); | |
481 | return -errno; | |
482 | } | |
4b4da7f7 | 483 | /* Skip to starting line number */ |
44b81e92 | 484 | while (l < lr->start) { |
fde52dbd | 485 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
486 | if (ret < 0) |
487 | goto end; | |
488 | } | |
4b4da7f7 MH |
489 | |
490 | list_for_each_entry(ln, &lr->line_list, list) { | |
44b81e92 | 491 | for (; ln->line > l; l++) { |
fde52dbd | 492 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
493 | if (ret < 0) |
494 | goto end; | |
495 | } | |
fde52dbd | 496 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
497 | if (ret < 0) |
498 | goto end; | |
4b4da7f7 MH |
499 | } |
500 | ||
501 | if (lr->end == INT_MAX) | |
502 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
503 | while (l <= lr->end) { |
504 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
505 | if (ret <= 0) | |
44b81e92 FBH |
506 | break; |
507 | } | |
146a1439 | 508 | end: |
4b4da7f7 | 509 | fclose(fp); |
146a1439 | 510 | return ret; |
4b4da7f7 MH |
511 | } |
512 | ||
ff741783 MH |
513 | static int show_available_vars_at(struct debuginfo *dinfo, |
514 | struct perf_probe_event *pev, | |
bd09d7b5 MH |
515 | int max_vls, struct strfilter *_filter, |
516 | bool externs) | |
cf6eb489 MH |
517 | { |
518 | char *buf; | |
bd09d7b5 | 519 | int ret, i, nvars; |
cf6eb489 MH |
520 | struct str_node *node; |
521 | struct variable_list *vls = NULL, *vl; | |
bd09d7b5 | 522 | const char *var; |
cf6eb489 MH |
523 | |
524 | buf = synthesize_perf_probe_point(&pev->point); | |
525 | if (!buf) | |
526 | return -EINVAL; | |
527 | pr_debug("Searching variables at %s\n", buf); | |
528 | ||
ff741783 MH |
529 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls, |
530 | max_vls, externs); | |
bd09d7b5 MH |
531 | if (ret <= 0) { |
532 | pr_err("Failed to find variables at %s (%d)\n", buf, ret); | |
533 | goto end; | |
534 | } | |
535 | /* Some variables are found */ | |
536 | fprintf(stdout, "Available variables at %s\n", buf); | |
537 | for (i = 0; i < ret; i++) { | |
538 | vl = &vls[i]; | |
539 | /* | |
540 | * A probe point might be converted to | |
541 | * several trace points. | |
542 | */ | |
543 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
544 | vl->point.offset); | |
545 | free(vl->point.symbol); | |
546 | nvars = 0; | |
547 | if (vl->vars) { | |
548 | strlist__for_each(node, vl->vars) { | |
549 | var = strchr(node->s, '\t') + 1; | |
550 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 551 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
552 | nvars++; |
553 | } | |
554 | } | |
555 | strlist__delete(vl->vars); | |
cf6eb489 | 556 | } |
bd09d7b5 MH |
557 | if (nvars == 0) |
558 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
559 | } | |
560 | free(vls); | |
561 | end: | |
cf6eb489 MH |
562 | free(buf); |
563 | return ret; | |
564 | } | |
565 | ||
566 | /* Show available variables on given probe point */ | |
567 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
bd09d7b5 MH |
568 | int max_vls, const char *module, |
569 | struct strfilter *_filter, bool externs) | |
cf6eb489 | 570 | { |
ff741783 MH |
571 | int i, ret = 0; |
572 | struct debuginfo *dinfo; | |
cf6eb489 MH |
573 | |
574 | ret = init_vmlinux(); | |
575 | if (ret < 0) | |
576 | return ret; | |
577 | ||
ff741783 MH |
578 | dinfo = open_debuginfo(module); |
579 | if (!dinfo) { | |
580 | pr_warning("Failed to open debuginfo file.\n"); | |
581 | return -ENOENT; | |
582 | } | |
583 | ||
cf6eb489 MH |
584 | setup_pager(); |
585 | ||
ff741783 MH |
586 | for (i = 0; i < npevs && ret >= 0; i++) |
587 | ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter, | |
bd09d7b5 | 588 | externs); |
ff741783 MH |
589 | |
590 | debuginfo__delete(dinfo); | |
cf6eb489 MH |
591 | return ret; |
592 | } | |
593 | ||
4b4da7f7 MH |
594 | #else /* !DWARF_SUPPORT */ |
595 | ||
0e60836b | 596 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, |
469b9b88 | 597 | struct perf_probe_point *pp) |
4b4da7f7 | 598 | { |
469b9b88 MH |
599 | struct symbol *sym; |
600 | ||
601 | sym = __find_kernel_function_by_name(tp->symbol, NULL); | |
602 | if (!sym) { | |
603 | pr_err("Failed to find symbol %s in kernel.\n", tp->symbol); | |
604 | return -ENOENT; | |
605 | } | |
02b95dad MH |
606 | pp->function = strdup(tp->symbol); |
607 | if (pp->function == NULL) | |
608 | return -ENOMEM; | |
4b4da7f7 MH |
609 | pp->offset = tp->offset; |
610 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
611 | |
612 | return 0; | |
4b4da7f7 MH |
613 | } |
614 | ||
0e60836b SD |
615 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
616 | struct probe_trace_event **tevs __unused, | |
469b9b88 | 617 | int max_tevs __unused, const char *mod __unused) |
4b4da7f7 | 618 | { |
146a1439 MH |
619 | if (perf_probe_event_need_dwarf(pev)) { |
620 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
621 | return -ENOSYS; | |
622 | } | |
4b4da7f7 MH |
623 | return 0; |
624 | } | |
625 | ||
469b9b88 | 626 | int show_line_range(struct line_range *lr __unused, const char *module __unused) |
4b4da7f7 | 627 | { |
146a1439 MH |
628 | pr_warning("Debuginfo-analysis is not supported.\n"); |
629 | return -ENOSYS; | |
4b4da7f7 MH |
630 | } |
631 | ||
cf6eb489 | 632 | int show_available_vars(struct perf_probe_event *pevs __unused, |
469b9b88 | 633 | int npevs __unused, int max_vls __unused, |
bd09d7b5 MH |
634 | const char *module __unused, |
635 | struct strfilter *filter __unused, | |
636 | bool externs __unused) | |
cf6eb489 MH |
637 | { |
638 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
639 | return -ENOSYS; | |
640 | } | |
e0faa8d3 MH |
641 | #endif |
642 | ||
21dd9ae5 FBH |
643 | static int parse_line_num(char **ptr, int *val, const char *what) |
644 | { | |
645 | const char *start = *ptr; | |
646 | ||
647 | errno = 0; | |
648 | *val = strtol(*ptr, ptr, 0); | |
649 | if (errno || *ptr == start) { | |
650 | semantic_error("'%s' is not a valid number.\n", what); | |
651 | return -EINVAL; | |
652 | } | |
653 | return 0; | |
654 | } | |
655 | ||
9d95b580 FBH |
656 | /* |
657 | * Stuff 'lr' according to the line range described by 'arg'. | |
658 | * The line range syntax is described by: | |
659 | * | |
660 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 661 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 662 | */ |
146a1439 | 663 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 664 | { |
e116dfa1 | 665 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
666 | int err; |
667 | ||
668 | if (!name) | |
669 | return -ENOMEM; | |
670 | ||
671 | lr->start = 0; | |
672 | lr->end = INT_MAX; | |
673 | ||
674 | range = strchr(name, ':'); | |
675 | if (range) { | |
676 | *range++ = '\0'; | |
677 | ||
678 | err = parse_line_num(&range, &lr->start, "start line"); | |
679 | if (err) | |
680 | goto err; | |
681 | ||
682 | if (*range == '+' || *range == '-') { | |
683 | const char c = *range++; | |
684 | ||
685 | err = parse_line_num(&range, &lr->end, "end line"); | |
686 | if (err) | |
687 | goto err; | |
688 | ||
689 | if (c == '+') { | |
690 | lr->end += lr->start; | |
691 | /* | |
692 | * Adjust the number of lines here. | |
693 | * If the number of lines == 1, the | |
694 | * the end of line should be equal to | |
695 | * the start of line. | |
696 | */ | |
697 | lr->end--; | |
698 | } | |
699 | } | |
9d95b580 | 700 | |
d3b63d7a | 701 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
702 | |
703 | err = -EINVAL; | |
d3b63d7a | 704 | if (lr->start > lr->end) { |
631c9def | 705 | semantic_error("Start line must be smaller" |
146a1439 | 706 | " than end line.\n"); |
21dd9ae5 | 707 | goto err; |
146a1439 | 708 | } |
21dd9ae5 FBH |
709 | if (*range != '\0') { |
710 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
711 | goto err; | |
146a1439 | 712 | } |
d3b63d7a | 713 | } |
02b95dad | 714 | |
e116dfa1 MH |
715 | file = strchr(name, '@'); |
716 | if (file) { | |
717 | *file = '\0'; | |
718 | lr->file = strdup(++file); | |
719 | if (lr->file == NULL) { | |
720 | err = -ENOMEM; | |
721 | goto err; | |
722 | } | |
723 | lr->function = name; | |
724 | } else if (strchr(name, '.')) | |
21dd9ae5 | 725 | lr->file = name; |
631c9def | 726 | else |
21dd9ae5 | 727 | lr->function = name; |
146a1439 MH |
728 | |
729 | return 0; | |
21dd9ae5 FBH |
730 | err: |
731 | free(name); | |
732 | return err; | |
631c9def MH |
733 | } |
734 | ||
b7702a21 MH |
735 | /* Check the name is good for event/group */ |
736 | static bool check_event_name(const char *name) | |
737 | { | |
738 | if (!isalpha(*name) && *name != '_') | |
739 | return false; | |
740 | while (*++name != '\0') { | |
741 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
742 | return false; | |
743 | } | |
744 | return true; | |
745 | } | |
746 | ||
50656eec | 747 | /* Parse probepoint definition. */ |
146a1439 | 748 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 749 | { |
4235b045 | 750 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
751 | char *ptr, *tmp; |
752 | char c, nc = 0; | |
753 | /* | |
754 | * <Syntax> | |
2a9c8c36 MH |
755 | * perf probe [EVENT=]SRC[:LN|;PTN] |
756 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
757 | * |
758 | * TODO:Group name support | |
50656eec MH |
759 | */ |
760 | ||
2a9c8c36 MH |
761 | ptr = strpbrk(arg, ";=@+%"); |
762 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
763 | *ptr = '\0'; |
764 | tmp = ptr + 1; | |
146a1439 MH |
765 | if (strchr(arg, ':')) { |
766 | semantic_error("Group name is not supported yet.\n"); | |
767 | return -ENOTSUP; | |
768 | } | |
769 | if (!check_event_name(arg)) { | |
b7702a21 | 770 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
771 | "follow C symbol-naming rule.\n", arg); |
772 | return -EINVAL; | |
773 | } | |
02b95dad MH |
774 | pev->event = strdup(arg); |
775 | if (pev->event == NULL) | |
776 | return -ENOMEM; | |
4235b045 | 777 | pev->group = NULL; |
af663d75 MH |
778 | arg = tmp; |
779 | } | |
780 | ||
2a9c8c36 | 781 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
782 | if (ptr) { |
783 | nc = *ptr; | |
784 | *ptr++ = '\0'; | |
785 | } | |
786 | ||
02b95dad MH |
787 | tmp = strdup(arg); |
788 | if (tmp == NULL) | |
789 | return -ENOMEM; | |
790 | ||
50656eec | 791 | /* Check arg is function or file and copy it */ |
02b95dad MH |
792 | if (strchr(tmp, '.')) /* File */ |
793 | pp->file = tmp; | |
50656eec | 794 | else /* Function */ |
02b95dad | 795 | pp->function = tmp; |
50656eec MH |
796 | |
797 | /* Parse other options */ | |
798 | while (ptr) { | |
799 | arg = ptr; | |
800 | c = nc; | |
2a9c8c36 | 801 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
802 | pp->lazy_line = strdup(arg); |
803 | if (pp->lazy_line == NULL) | |
804 | return -ENOMEM; | |
2a9c8c36 MH |
805 | break; |
806 | } | |
807 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
808 | if (ptr) { |
809 | nc = *ptr; | |
810 | *ptr++ = '\0'; | |
811 | } | |
812 | switch (c) { | |
813 | case ':': /* Line number */ | |
814 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 815 | if (*tmp != '\0') { |
2a9c8c36 | 816 | semantic_error("There is non-digit char" |
146a1439 MH |
817 | " in line number.\n"); |
818 | return -EINVAL; | |
819 | } | |
50656eec MH |
820 | break; |
821 | case '+': /* Byte offset from a symbol */ | |
822 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 823 | if (*tmp != '\0') { |
2a9c8c36 | 824 | semantic_error("There is non-digit character" |
146a1439 MH |
825 | " in offset.\n"); |
826 | return -EINVAL; | |
827 | } | |
50656eec MH |
828 | break; |
829 | case '@': /* File name */ | |
146a1439 MH |
830 | if (pp->file) { |
831 | semantic_error("SRC@SRC is not allowed.\n"); | |
832 | return -EINVAL; | |
833 | } | |
02b95dad MH |
834 | pp->file = strdup(arg); |
835 | if (pp->file == NULL) | |
836 | return -ENOMEM; | |
50656eec MH |
837 | break; |
838 | case '%': /* Probe places */ | |
839 | if (strcmp(arg, "return") == 0) { | |
840 | pp->retprobe = 1; | |
146a1439 MH |
841 | } else { /* Others not supported yet */ |
842 | semantic_error("%%%s is not supported.\n", arg); | |
843 | return -ENOTSUP; | |
844 | } | |
50656eec | 845 | break; |
146a1439 MH |
846 | default: /* Buggy case */ |
847 | pr_err("This program has a bug at %s:%d.\n", | |
848 | __FILE__, __LINE__); | |
849 | return -ENOTSUP; | |
50656eec MH |
850 | break; |
851 | } | |
852 | } | |
853 | ||
854 | /* Exclusion check */ | |
146a1439 | 855 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
856 | semantic_error("Lazy pattern can't be used with" |
857 | " line number.\n"); | |
146a1439 MH |
858 | return -EINVAL; |
859 | } | |
2a9c8c36 | 860 | |
146a1439 | 861 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 862 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
863 | return -EINVAL; |
864 | } | |
2a9c8c36 | 865 | |
146a1439 | 866 | if (pp->line && pp->offset) { |
0e43e5d2 | 867 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
868 | return -EINVAL; |
869 | } | |
50656eec | 870 | |
146a1439 | 871 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 872 | semantic_error("File always requires line number or " |
0e43e5d2 | 873 | "lazy pattern.\n"); |
146a1439 MH |
874 | return -EINVAL; |
875 | } | |
50656eec | 876 | |
146a1439 | 877 | if (pp->offset && !pp->function) { |
0e43e5d2 | 878 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
879 | return -EINVAL; |
880 | } | |
50656eec | 881 | |
146a1439 | 882 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 883 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
884 | return -EINVAL; |
885 | } | |
50656eec | 886 | |
146a1439 | 887 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 888 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 889 | "return probe.\n"); |
146a1439 MH |
890 | return -EINVAL; |
891 | } | |
50656eec | 892 | |
4235b045 | 893 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
894 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
895 | pp->lazy_line); | |
146a1439 | 896 | return 0; |
50656eec MH |
897 | } |
898 | ||
7df2f329 | 899 | /* Parse perf-probe event argument */ |
146a1439 | 900 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 901 | { |
b2a3c12b | 902 | char *tmp, *goodname; |
7df2f329 MH |
903 | struct perf_probe_arg_field **fieldp; |
904 | ||
905 | pr_debug("parsing arg: %s into ", str); | |
906 | ||
48481938 MH |
907 | tmp = strchr(str, '='); |
908 | if (tmp) { | |
02b95dad MH |
909 | arg->name = strndup(str, tmp - str); |
910 | if (arg->name == NULL) | |
911 | return -ENOMEM; | |
11a1ca35 | 912 | pr_debug("name:%s ", arg->name); |
48481938 MH |
913 | str = tmp + 1; |
914 | } | |
915 | ||
11a1ca35 MH |
916 | tmp = strchr(str, ':'); |
917 | if (tmp) { /* Type setting */ | |
918 | *tmp = '\0'; | |
02b95dad MH |
919 | arg->type = strdup(tmp + 1); |
920 | if (arg->type == NULL) | |
921 | return -ENOMEM; | |
11a1ca35 MH |
922 | pr_debug("type:%s ", arg->type); |
923 | } | |
924 | ||
b2a3c12b | 925 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
926 | if (!is_c_varname(str) || !tmp) { |
927 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
928 | arg->var = strdup(str); |
929 | if (arg->var == NULL) | |
930 | return -ENOMEM; | |
48481938 | 931 | pr_debug("%s\n", arg->var); |
146a1439 | 932 | return 0; |
7df2f329 MH |
933 | } |
934 | ||
b2a3c12b | 935 | /* Structure fields or array element */ |
02b95dad MH |
936 | arg->var = strndup(str, tmp - str); |
937 | if (arg->var == NULL) | |
938 | return -ENOMEM; | |
b2a3c12b | 939 | goodname = arg->var; |
48481938 | 940 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
941 | fieldp = &arg->field; |
942 | ||
943 | do { | |
e334016f MH |
944 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
945 | if (*fieldp == NULL) | |
946 | return -ENOMEM; | |
b2a3c12b MH |
947 | if (*tmp == '[') { /* Array */ |
948 | str = tmp; | |
949 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 950 | (*fieldp)->ref = true; |
b2a3c12b MH |
951 | if (*tmp != ']' || tmp == str + 1) { |
952 | semantic_error("Array index must be a" | |
953 | " number.\n"); | |
954 | return -EINVAL; | |
955 | } | |
956 | tmp++; | |
957 | if (*tmp == '\0') | |
958 | tmp = NULL; | |
959 | } else { /* Structure */ | |
960 | if (*tmp == '.') { | |
961 | str = tmp + 1; | |
962 | (*fieldp)->ref = false; | |
963 | } else if (tmp[1] == '>') { | |
964 | str = tmp + 2; | |
965 | (*fieldp)->ref = true; | |
966 | } else { | |
967 | semantic_error("Argument parse error: %s\n", | |
968 | str); | |
969 | return -EINVAL; | |
970 | } | |
971 | tmp = strpbrk(str, "-.["); | |
146a1439 | 972 | } |
7df2f329 | 973 | if (tmp) { |
02b95dad MH |
974 | (*fieldp)->name = strndup(str, tmp - str); |
975 | if ((*fieldp)->name == NULL) | |
976 | return -ENOMEM; | |
b2a3c12b MH |
977 | if (*str != '[') |
978 | goodname = (*fieldp)->name; | |
7df2f329 MH |
979 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
980 | fieldp = &(*fieldp)->next; | |
981 | } | |
982 | } while (tmp); | |
02b95dad MH |
983 | (*fieldp)->name = strdup(str); |
984 | if ((*fieldp)->name == NULL) | |
985 | return -ENOMEM; | |
b2a3c12b MH |
986 | if (*str != '[') |
987 | goodname = (*fieldp)->name; | |
7df2f329 | 988 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 989 | |
b2a3c12b | 990 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 991 | if (!arg->name) { |
b2a3c12b | 992 | arg->name = strdup(goodname); |
02b95dad MH |
993 | if (arg->name == NULL) |
994 | return -ENOMEM; | |
995 | } | |
146a1439 | 996 | return 0; |
7df2f329 MH |
997 | } |
998 | ||
4235b045 | 999 | /* Parse perf-probe event command */ |
146a1439 | 1000 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1001 | { |
e1c01d61 | 1002 | char **argv; |
146a1439 | 1003 | int argc, i, ret = 0; |
fac13fd5 | 1004 | |
4235b045 | 1005 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1006 | if (!argv) { |
1007 | pr_debug("Failed to split arguments.\n"); | |
1008 | return -ENOMEM; | |
1009 | } | |
1010 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1011 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1012 | ret = -ERANGE; | |
1013 | goto out; | |
1014 | } | |
50656eec | 1015 | /* Parse probe point */ |
146a1439 MH |
1016 | ret = parse_perf_probe_point(argv[0], pev); |
1017 | if (ret < 0) | |
1018 | goto out; | |
50656eec | 1019 | |
e1c01d61 | 1020 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1021 | pev->nargs = argc - 1; |
e334016f MH |
1022 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1023 | if (pev->args == NULL) { | |
1024 | ret = -ENOMEM; | |
1025 | goto out; | |
1026 | } | |
146a1439 MH |
1027 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1028 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1029 | if (ret >= 0 && | |
1030 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1031 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1032 | " kretprobe.\n"); |
1033 | ret = -EINVAL; | |
1034 | } | |
e1c01d61 | 1035 | } |
146a1439 | 1036 | out: |
e1c01d61 | 1037 | argv_free(argv); |
146a1439 MH |
1038 | |
1039 | return ret; | |
50656eec MH |
1040 | } |
1041 | ||
4235b045 MH |
1042 | /* Return true if this perf_probe_event requires debuginfo */ |
1043 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1044 | { | |
1045 | int i; | |
1046 | ||
1047 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
1048 | return true; | |
1049 | ||
1050 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 1051 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
1052 | return true; |
1053 | ||
1054 | return false; | |
1055 | } | |
1056 | ||
0e60836b SD |
1057 | /* Parse probe_events event into struct probe_point */ |
1058 | static int parse_probe_trace_command(const char *cmd, | |
190b57fc | 1059 | struct probe_trace_event *tev) |
4de189fe | 1060 | { |
0e60836b | 1061 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1062 | char pr; |
1063 | char *p; | |
1064 | int ret, i, argc; | |
1065 | char **argv; | |
1066 | ||
0e60836b | 1067 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1068 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1069 | if (!argv) { |
1070 | pr_debug("Failed to split arguments.\n"); | |
1071 | return -ENOMEM; | |
1072 | } | |
1073 | if (argc < 2) { | |
1074 | semantic_error("Too few probe arguments.\n"); | |
1075 | ret = -ERANGE; | |
1076 | goto out; | |
1077 | } | |
4de189fe MH |
1078 | |
1079 | /* Scan event and group name. */ | |
93aaa45a | 1080 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
1081 | &pr, (float *)(void *)&tev->group, |
1082 | (float *)(void *)&tev->event); | |
146a1439 MH |
1083 | if (ret != 3) { |
1084 | semantic_error("Failed to parse event name: %s\n", argv[0]); | |
1085 | ret = -EINVAL; | |
1086 | goto out; | |
1087 | } | |
4235b045 | 1088 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1089 | |
4235b045 | 1090 | tp->retprobe = (pr == 'r'); |
4de189fe | 1091 | |
190b57fc MH |
1092 | /* Scan module name(if there), function name and offset */ |
1093 | p = strchr(argv[1], ':'); | |
1094 | if (p) { | |
1095 | tp->module = strndup(argv[1], p - argv[1]); | |
1096 | p++; | |
1097 | } else | |
1098 | p = argv[1]; | |
1099 | ret = sscanf(p, "%a[^+]+%lu", (float *)(void *)&tp->symbol, | |
4235b045 | 1100 | &tp->offset); |
4de189fe | 1101 | if (ret == 1) |
4235b045 | 1102 | tp->offset = 0; |
4de189fe | 1103 | |
4235b045 | 1104 | tev->nargs = argc - 2; |
0e60836b | 1105 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1106 | if (tev->args == NULL) { |
1107 | ret = -ENOMEM; | |
1108 | goto out; | |
1109 | } | |
4235b045 | 1110 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1111 | p = strchr(argv[i + 2], '='); |
1112 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1113 | *p++ = '\0'; |
1114 | else | |
1115 | p = argv[i + 2]; | |
02b95dad | 1116 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1117 | /* TODO: parse regs and offset */ |
02b95dad MH |
1118 | tev->args[i].value = strdup(p); |
1119 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1120 | ret = -ENOMEM; | |
1121 | goto out; | |
1122 | } | |
4de189fe | 1123 | } |
146a1439 MH |
1124 | ret = 0; |
1125 | out: | |
4de189fe | 1126 | argv_free(argv); |
146a1439 | 1127 | return ret; |
4de189fe MH |
1128 | } |
1129 | ||
7df2f329 MH |
1130 | /* Compose only probe arg */ |
1131 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
1132 | { | |
1133 | struct perf_probe_arg_field *field = pa->field; | |
1134 | int ret; | |
1135 | char *tmp = buf; | |
1136 | ||
48481938 MH |
1137 | if (pa->name && pa->var) |
1138 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
1139 | else | |
1140 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
1141 | if (ret <= 0) |
1142 | goto error; | |
1143 | tmp += ret; | |
1144 | len -= ret; | |
1145 | ||
1146 | while (field) { | |
b2a3c12b MH |
1147 | if (field->name[0] == '[') |
1148 | ret = e_snprintf(tmp, len, "%s", field->name); | |
1149 | else | |
1150 | ret = e_snprintf(tmp, len, "%s%s", | |
1151 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
1152 | if (ret <= 0) |
1153 | goto error; | |
1154 | tmp += ret; | |
1155 | len -= ret; | |
1156 | field = field->next; | |
1157 | } | |
11a1ca35 MH |
1158 | |
1159 | if (pa->type) { | |
1160 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
1161 | if (ret <= 0) | |
1162 | goto error; | |
1163 | tmp += ret; | |
1164 | len -= ret; | |
1165 | } | |
1166 | ||
7df2f329 MH |
1167 | return tmp - buf; |
1168 | error: | |
0e43e5d2 | 1169 | pr_debug("Failed to synthesize perf probe argument: %s\n", |
146a1439 MH |
1170 | strerror(-ret)); |
1171 | return ret; | |
7df2f329 MH |
1172 | } |
1173 | ||
4235b045 MH |
1174 | /* Compose only probe point (not argument) */ |
1175 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1176 | { |
fb1587d8 MH |
1177 | char *buf, *tmp; |
1178 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1179 | int ret, len; | |
4de189fe | 1180 | |
e334016f MH |
1181 | buf = zalloc(MAX_CMDLEN); |
1182 | if (buf == NULL) { | |
1183 | ret = -ENOMEM; | |
1184 | goto error; | |
1185 | } | |
4de189fe | 1186 | if (pp->offset) { |
fb1587d8 | 1187 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1188 | if (ret <= 0) |
1189 | goto error; | |
1190 | } | |
1191 | if (pp->line) { | |
fb1587d8 MH |
1192 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1193 | if (ret <= 0) | |
1194 | goto error; | |
1195 | } | |
1196 | if (pp->file) { | |
32ae2ade FBH |
1197 | tmp = pp->file; |
1198 | len = strlen(tmp); | |
1199 | if (len > 30) { | |
1200 | tmp = strchr(pp->file + len - 30, '/'); | |
1201 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1202 | } | |
1203 | ret = e_snprintf(file, 32, "@%s", tmp); | |
4de189fe MH |
1204 | if (ret <= 0) |
1205 | goto error; | |
1206 | } | |
1207 | ||
1208 | if (pp->function) | |
fb1587d8 MH |
1209 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1210 | offs, pp->retprobe ? "%return" : "", line, | |
1211 | file); | |
4de189fe | 1212 | else |
fb1587d8 | 1213 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1214 | if (ret <= 0) |
1215 | goto error; | |
1216 | ||
1217 | return buf; | |
7ef17aaf | 1218 | error: |
0e43e5d2 | 1219 | pr_debug("Failed to synthesize perf probe point: %s\n", |
146a1439 | 1220 | strerror(-ret)); |
e334016f MH |
1221 | if (buf) |
1222 | free(buf); | |
146a1439 | 1223 | return NULL; |
7ef17aaf MH |
1224 | } |
1225 | ||
4235b045 MH |
1226 | #if 0 |
1227 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1228 | { |
1229 | char *buf; | |
1230 | int i, len, ret; | |
1231 | ||
4235b045 MH |
1232 | buf = synthesize_perf_probe_point(&pev->point); |
1233 | if (!buf) | |
1234 | return NULL; | |
4de189fe | 1235 | |
4235b045 MH |
1236 | len = strlen(buf); |
1237 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1238 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1239 | pev->args[i].name); |
1240 | if (ret <= 0) { | |
1241 | free(buf); | |
1242 | return NULL; | |
1243 | } | |
4de189fe MH |
1244 | len += ret; |
1245 | } | |
4de189fe | 1246 | |
4235b045 MH |
1247 | return buf; |
1248 | } | |
1249 | #endif | |
1250 | ||
0e60836b | 1251 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1252 | char **buf, size_t *buflen, |
1253 | int depth) | |
1254 | { | |
1255 | int ret; | |
1256 | if (ref->next) { | |
0e60836b | 1257 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1258 | buflen, depth + 1); |
1259 | if (depth < 0) | |
1260 | goto out; | |
1261 | } | |
1262 | ||
1263 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1264 | if (ret < 0) | |
1265 | depth = ret; | |
1266 | else { | |
1267 | *buf += ret; | |
1268 | *buflen -= ret; | |
1269 | } | |
1270 | out: | |
1271 | return depth; | |
4de189fe | 1272 | |
4de189fe MH |
1273 | } |
1274 | ||
0e60836b | 1275 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1276 | char *buf, size_t buflen) |
50656eec | 1277 | { |
0e60836b | 1278 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1279 | int ret, depth = 0; |
1280 | char *tmp = buf; | |
1281 | ||
1282 | /* Argument name or separator */ | |
1283 | if (arg->name) | |
1284 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1285 | else | |
1286 | ret = e_snprintf(buf, buflen, " "); | |
1287 | if (ret < 0) | |
1288 | return ret; | |
1289 | buf += ret; | |
1290 | buflen -= ret; | |
1291 | ||
b7dcb857 MH |
1292 | /* Special case: @XXX */ |
1293 | if (arg->value[0] == '@' && arg->ref) | |
1294 | ref = ref->next; | |
1295 | ||
4235b045 | 1296 | /* Dereferencing arguments */ |
b7dcb857 | 1297 | if (ref) { |
0e60836b | 1298 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1299 | &buflen, 1); |
1300 | if (depth < 0) | |
1301 | return depth; | |
1302 | } | |
1303 | ||
1304 | /* Print argument value */ | |
b7dcb857 MH |
1305 | if (arg->value[0] == '@' && arg->ref) |
1306 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1307 | arg->ref->offset); | |
1308 | else | |
1309 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1310 | if (ret < 0) |
1311 | return ret; | |
1312 | buf += ret; | |
1313 | buflen -= ret; | |
1314 | ||
1315 | /* Closing */ | |
1316 | while (depth--) { | |
1317 | ret = e_snprintf(buf, buflen, ")"); | |
1318 | if (ret < 0) | |
1319 | return ret; | |
1320 | buf += ret; | |
1321 | buflen -= ret; | |
1322 | } | |
4984912e MH |
1323 | /* Print argument type */ |
1324 | if (arg->type) { | |
1325 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1326 | if (ret <= 0) | |
1327 | return ret; | |
1328 | buf += ret; | |
1329 | } | |
4235b045 MH |
1330 | |
1331 | return buf - tmp; | |
1332 | } | |
1333 | ||
0e60836b | 1334 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1335 | { |
0e60836b | 1336 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1337 | char *buf; |
1338 | int i, len, ret; | |
1339 | ||
e334016f MH |
1340 | buf = zalloc(MAX_CMDLEN); |
1341 | if (buf == NULL) | |
1342 | return NULL; | |
1343 | ||
190b57fc | 1344 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s%s%s+%lu", |
4235b045 MH |
1345 | tp->retprobe ? 'r' : 'p', |
1346 | tev->group, tev->event, | |
190b57fc | 1347 | tp->module ?: "", tp->module ? ":" : "", |
4235b045 MH |
1348 | tp->symbol, tp->offset); |
1349 | if (len <= 0) | |
50656eec | 1350 | goto error; |
50656eec | 1351 | |
4235b045 | 1352 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1353 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1354 | MAX_CMDLEN - len); |
4de189fe | 1355 | if (ret <= 0) |
50656eec MH |
1356 | goto error; |
1357 | len += ret; | |
1358 | } | |
50656eec | 1359 | |
4235b045 | 1360 | return buf; |
50656eec | 1361 | error: |
4235b045 MH |
1362 | free(buf); |
1363 | return NULL; | |
1364 | } | |
50656eec | 1365 | |
0e60836b | 1366 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
469b9b88 | 1367 | struct perf_probe_event *pev) |
4235b045 | 1368 | { |
02b95dad | 1369 | char buf[64] = ""; |
146a1439 | 1370 | int i, ret; |
4235b045 | 1371 | |
4b4da7f7 | 1372 | /* Convert event/group name */ |
02b95dad MH |
1373 | pev->event = strdup(tev->event); |
1374 | pev->group = strdup(tev->group); | |
1375 | if (pev->event == NULL || pev->group == NULL) | |
1376 | return -ENOMEM; | |
fb1587d8 | 1377 | |
4b4da7f7 | 1378 | /* Convert trace_point to probe_point */ |
0e60836b | 1379 | ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); |
146a1439 MH |
1380 | if (ret < 0) |
1381 | return ret; | |
4b4da7f7 | 1382 | |
4235b045 MH |
1383 | /* Convert trace_arg to probe_arg */ |
1384 | pev->nargs = tev->nargs; | |
e334016f MH |
1385 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1386 | if (pev->args == NULL) | |
1387 | return -ENOMEM; | |
02b95dad | 1388 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1389 | if (tev->args[i].name) |
02b95dad | 1390 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1391 | else { |
0e60836b | 1392 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1393 | buf, 64); |
02b95dad | 1394 | pev->args[i].name = strdup(buf); |
4235b045 | 1395 | } |
02b95dad MH |
1396 | if (pev->args[i].name == NULL && ret >= 0) |
1397 | ret = -ENOMEM; | |
1398 | } | |
146a1439 MH |
1399 | |
1400 | if (ret < 0) | |
1401 | clear_perf_probe_event(pev); | |
1402 | ||
1403 | return ret; | |
4235b045 MH |
1404 | } |
1405 | ||
1406 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1407 | { | |
1408 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1409 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1410 | int i; |
1411 | ||
1412 | if (pev->event) | |
1413 | free(pev->event); | |
1414 | if (pev->group) | |
1415 | free(pev->group); | |
1416 | if (pp->file) | |
1417 | free(pp->file); | |
1418 | if (pp->function) | |
1419 | free(pp->function); | |
1420 | if (pp->lazy_line) | |
1421 | free(pp->lazy_line); | |
7df2f329 | 1422 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1423 | if (pev->args[i].name) |
1424 | free(pev->args[i].name); | |
48481938 MH |
1425 | if (pev->args[i].var) |
1426 | free(pev->args[i].var); | |
11a1ca35 MH |
1427 | if (pev->args[i].type) |
1428 | free(pev->args[i].type); | |
7df2f329 MH |
1429 | field = pev->args[i].field; |
1430 | while (field) { | |
1431 | next = field->next; | |
1432 | if (field->name) | |
1433 | free(field->name); | |
1434 | free(field); | |
1435 | field = next; | |
1436 | } | |
1437 | } | |
4235b045 MH |
1438 | if (pev->args) |
1439 | free(pev->args); | |
1440 | memset(pev, 0, sizeof(*pev)); | |
1441 | } | |
1442 | ||
0e60836b | 1443 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1444 | { |
0e60836b | 1445 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1446 | int i; |
1447 | ||
1448 | if (tev->event) | |
1449 | free(tev->event); | |
1450 | if (tev->group) | |
1451 | free(tev->group); | |
1452 | if (tev->point.symbol) | |
1453 | free(tev->point.symbol); | |
190b57fc MH |
1454 | if (tev->point.module) |
1455 | free(tev->point.module); | |
4235b045 MH |
1456 | for (i = 0; i < tev->nargs; i++) { |
1457 | if (tev->args[i].name) | |
1458 | free(tev->args[i].name); | |
1459 | if (tev->args[i].value) | |
1460 | free(tev->args[i].value); | |
4984912e MH |
1461 | if (tev->args[i].type) |
1462 | free(tev->args[i].type); | |
4235b045 MH |
1463 | ref = tev->args[i].ref; |
1464 | while (ref) { | |
1465 | next = ref->next; | |
1466 | free(ref); | |
1467 | ref = next; | |
1468 | } | |
1469 | } | |
1470 | if (tev->args) | |
1471 | free(tev->args); | |
1472 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1473 | } |
1474 | ||
f4d7da49 | 1475 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
1476 | { |
1477 | char buf[PATH_MAX]; | |
7ca5989d | 1478 | const char *__debugfs; |
4de189fe MH |
1479 | int ret; |
1480 | ||
7ca5989d MH |
1481 | __debugfs = debugfs_find_mountpoint(); |
1482 | if (__debugfs == NULL) { | |
1483 | pr_warning("Debugfs is not mounted.\n"); | |
1484 | return -ENOENT; | |
1485 | } | |
1486 | ||
1487 | ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); | |
146a1439 | 1488 | if (ret >= 0) { |
7ca5989d | 1489 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1490 | if (readwrite && !probe_event_dry_run) |
1491 | ret = open(buf, O_RDWR, O_APPEND); | |
1492 | else | |
1493 | ret = open(buf, O_RDONLY, 0); | |
1494 | } | |
f4d7da49 | 1495 | |
4de189fe MH |
1496 | if (ret < 0) { |
1497 | if (errno == ENOENT) | |
146a1439 MH |
1498 | pr_warning("kprobe_events file does not exist - please" |
1499 | " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); | |
4de189fe | 1500 | else |
146a1439 MH |
1501 | pr_warning("Failed to open kprobe_events file: %s\n", |
1502 | strerror(errno)); | |
4de189fe MH |
1503 | } |
1504 | return ret; | |
1505 | } | |
1506 | ||
1507 | /* Get raw string list of current kprobe_events */ | |
0e60836b | 1508 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1509 | { |
1510 | int ret, idx; | |
1511 | FILE *fp; | |
1512 | char buf[MAX_CMDLEN]; | |
1513 | char *p; | |
1514 | struct strlist *sl; | |
1515 | ||
1516 | sl = strlist__new(true, NULL); | |
1517 | ||
1518 | fp = fdopen(dup(fd), "r"); | |
1519 | while (!feof(fp)) { | |
1520 | p = fgets(buf, MAX_CMDLEN, fp); | |
1521 | if (!p) | |
1522 | break; | |
1523 | ||
1524 | idx = strlen(p) - 1; | |
1525 | if (p[idx] == '\n') | |
1526 | p[idx] = '\0'; | |
1527 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1528 | if (ret < 0) { |
1529 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1530 | strlist__delete(sl); | |
1531 | return NULL; | |
1532 | } | |
4de189fe MH |
1533 | } |
1534 | fclose(fp); | |
1535 | ||
1536 | return sl; | |
1537 | } | |
1538 | ||
278498d4 | 1539 | /* Show an event */ |
146a1439 | 1540 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1541 | { |
7e990a51 | 1542 | int i, ret; |
278498d4 | 1543 | char buf[128]; |
4235b045 | 1544 | char *place; |
278498d4 | 1545 | |
4235b045 MH |
1546 | /* Synthesize only event probe point */ |
1547 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1548 | if (!place) |
1549 | return -EINVAL; | |
4235b045 MH |
1550 | |
1551 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1552 | if (ret < 0) |
146a1439 MH |
1553 | return ret; |
1554 | ||
fb1587d8 | 1555 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1556 | |
4235b045 | 1557 | if (pev->nargs > 0) { |
278498d4 | 1558 | printf(" with"); |
7df2f329 | 1559 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1560 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1561 | buf, 128); | |
1562 | if (ret < 0) | |
1563 | break; | |
7df2f329 MH |
1564 | printf(" %s", buf); |
1565 | } | |
278498d4 MH |
1566 | } |
1567 | printf(")\n"); | |
4235b045 | 1568 | free(place); |
146a1439 | 1569 | return ret; |
278498d4 MH |
1570 | } |
1571 | ||
4de189fe | 1572 | /* List up current perf-probe events */ |
146a1439 | 1573 | int show_perf_probe_events(void) |
4de189fe | 1574 | { |
146a1439 | 1575 | int fd, ret; |
0e60836b | 1576 | struct probe_trace_event tev; |
4235b045 | 1577 | struct perf_probe_event pev; |
4de189fe MH |
1578 | struct strlist *rawlist; |
1579 | struct str_node *ent; | |
1580 | ||
72041334 | 1581 | setup_pager(); |
146a1439 MH |
1582 | ret = init_vmlinux(); |
1583 | if (ret < 0) | |
1584 | return ret; | |
4235b045 MH |
1585 | |
1586 | memset(&tev, 0, sizeof(tev)); | |
1587 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1588 | |
f4d7da49 | 1589 | fd = open_kprobe_events(false); |
146a1439 MH |
1590 | if (fd < 0) |
1591 | return fd; | |
1592 | ||
0e60836b | 1593 | rawlist = get_probe_trace_command_rawlist(fd); |
4de189fe | 1594 | close(fd); |
146a1439 MH |
1595 | if (!rawlist) |
1596 | return -ENOENT; | |
4de189fe | 1597 | |
adf365f4 | 1598 | strlist__for_each(ent, rawlist) { |
0e60836b | 1599 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1600 | if (ret >= 0) { |
1601 | ret = convert_to_perf_probe_event(&tev, &pev); | |
1602 | if (ret >= 0) | |
1603 | ret = show_perf_probe_event(&pev); | |
1604 | } | |
4235b045 | 1605 | clear_perf_probe_event(&pev); |
0e60836b | 1606 | clear_probe_trace_event(&tev); |
146a1439 MH |
1607 | if (ret < 0) |
1608 | break; | |
4de189fe | 1609 | } |
4de189fe | 1610 | strlist__delete(rawlist); |
146a1439 MH |
1611 | |
1612 | return ret; | |
4de189fe MH |
1613 | } |
1614 | ||
b498ce1f | 1615 | /* Get current perf-probe event names */ |
0e60836b | 1616 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1617 | { |
fa28244d | 1618 | char buf[128]; |
b498ce1f MH |
1619 | struct strlist *sl, *rawlist; |
1620 | struct str_node *ent; | |
0e60836b | 1621 | struct probe_trace_event tev; |
146a1439 | 1622 | int ret = 0; |
b498ce1f | 1623 | |
4235b045 | 1624 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 1625 | rawlist = get_probe_trace_command_rawlist(fd); |
e1d2017b | 1626 | sl = strlist__new(true, NULL); |
adf365f4 | 1627 | strlist__for_each(ent, rawlist) { |
0e60836b | 1628 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1629 | if (ret < 0) |
1630 | break; | |
fa28244d | 1631 | if (include_group) { |
146a1439 MH |
1632 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1633 | tev.event); | |
1634 | if (ret >= 0) | |
1635 | ret = strlist__add(sl, buf); | |
fa28244d | 1636 | } else |
146a1439 | 1637 | ret = strlist__add(sl, tev.event); |
0e60836b | 1638 | clear_probe_trace_event(&tev); |
146a1439 MH |
1639 | if (ret < 0) |
1640 | break; | |
b498ce1f | 1641 | } |
b498ce1f MH |
1642 | strlist__delete(rawlist); |
1643 | ||
146a1439 MH |
1644 | if (ret < 0) { |
1645 | strlist__delete(sl); | |
1646 | return NULL; | |
1647 | } | |
b498ce1f MH |
1648 | return sl; |
1649 | } | |
1650 | ||
0e60836b | 1651 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 1652 | { |
6eca8cc3 | 1653 | int ret = 0; |
0e60836b | 1654 | char *buf = synthesize_probe_trace_command(tev); |
50656eec | 1655 | |
146a1439 | 1656 | if (!buf) { |
0e60836b | 1657 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
1658 | return -EINVAL; |
1659 | } | |
1660 | ||
fa28244d | 1661 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1662 | if (!probe_event_dry_run) { |
1663 | ret = write(fd, buf, strlen(buf)); | |
1664 | if (ret <= 0) | |
146a1439 MH |
1665 | pr_warning("Failed to write event: %s\n", |
1666 | strerror(errno)); | |
f4d7da49 | 1667 | } |
4235b045 | 1668 | free(buf); |
146a1439 | 1669 | return ret; |
50656eec MH |
1670 | } |
1671 | ||
146a1439 MH |
1672 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1673 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1674 | { |
1675 | int i, ret; | |
17f88fcd MH |
1676 | |
1677 | /* Try no suffix */ | |
1678 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1679 | if (ret < 0) { |
1680 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1681 | return ret; | |
1682 | } | |
17f88fcd | 1683 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1684 | return 0; |
17f88fcd | 1685 | |
d761b08b MH |
1686 | if (!allow_suffix) { |
1687 | pr_warning("Error: event \"%s\" already exists. " | |
1688 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1689 | return -EEXIST; |
d761b08b MH |
1690 | } |
1691 | ||
17f88fcd MH |
1692 | /* Try to add suffix */ |
1693 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1694 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1695 | if (ret < 0) { |
1696 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1697 | return ret; | |
1698 | } | |
b498ce1f MH |
1699 | if (!strlist__has_entry(namelist, buf)) |
1700 | break; | |
1701 | } | |
146a1439 MH |
1702 | if (i == MAX_EVENT_INDEX) { |
1703 | pr_warning("Too many events are on the same function.\n"); | |
1704 | ret = -ERANGE; | |
1705 | } | |
1706 | ||
1707 | return ret; | |
b498ce1f MH |
1708 | } |
1709 | ||
0e60836b SD |
1710 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
1711 | struct probe_trace_event *tevs, | |
146a1439 | 1712 | int ntevs, bool allow_suffix) |
50656eec | 1713 | { |
146a1439 | 1714 | int i, fd, ret; |
0e60836b | 1715 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
1716 | char buf[64]; |
1717 | const char *event, *group; | |
b498ce1f | 1718 | struct strlist *namelist; |
50656eec | 1719 | |
f4d7da49 | 1720 | fd = open_kprobe_events(true); |
146a1439 MH |
1721 | if (fd < 0) |
1722 | return fd; | |
b498ce1f | 1723 | /* Get current event names */ |
0e60836b | 1724 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
1725 | if (!namelist) { |
1726 | pr_debug("Failed to get current event list.\n"); | |
1727 | return -EIO; | |
1728 | } | |
4235b045 | 1729 | |
146a1439 | 1730 | ret = 0; |
a844d1ef | 1731 | printf("Added new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1732 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1733 | tev = &tevs[i]; |
1734 | if (pev->event) | |
1735 | event = pev->event; | |
1736 | else | |
1737 | if (pev->point.function) | |
1738 | event = pev->point.function; | |
1739 | else | |
1740 | event = tev->point.symbol; | |
1741 | if (pev->group) | |
1742 | group = pev->group; | |
1743 | else | |
1744 | group = PERFPROBE_GROUP; | |
1745 | ||
1746 | /* Get an unused new event name */ | |
146a1439 MH |
1747 | ret = get_new_event_name(buf, 64, event, |
1748 | namelist, allow_suffix); | |
1749 | if (ret < 0) | |
1750 | break; | |
4235b045 MH |
1751 | event = buf; |
1752 | ||
02b95dad MH |
1753 | tev->event = strdup(event); |
1754 | tev->group = strdup(group); | |
1755 | if (tev->event == NULL || tev->group == NULL) { | |
1756 | ret = -ENOMEM; | |
1757 | break; | |
1758 | } | |
0e60836b | 1759 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
1760 | if (ret < 0) |
1761 | break; | |
4235b045 MH |
1762 | /* Add added event name to namelist */ |
1763 | strlist__add(namelist, event); | |
1764 | ||
1765 | /* Trick here - save current event/group */ | |
1766 | event = pev->event; | |
1767 | group = pev->group; | |
1768 | pev->event = tev->event; | |
1769 | pev->group = tev->group; | |
1770 | show_perf_probe_event(pev); | |
1771 | /* Trick here - restore current event/group */ | |
1772 | pev->event = (char *)event; | |
1773 | pev->group = (char *)group; | |
1774 | ||
1775 | /* | |
1776 | * Probes after the first probe which comes from same | |
1777 | * user input are always allowed to add suffix, because | |
1778 | * there might be several addresses corresponding to | |
1779 | * one code line. | |
1780 | */ | |
1781 | allow_suffix = true; | |
50656eec | 1782 | } |
146a1439 MH |
1783 | |
1784 | if (ret >= 0) { | |
1785 | /* Show how to use the event. */ | |
a844d1ef | 1786 | printf("\nYou can now use it in all perf tools, such as:\n\n"); |
146a1439 MH |
1787 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, |
1788 | tev->event); | |
1789 | } | |
a9b495b0 | 1790 | |
e1d2017b | 1791 | strlist__delete(namelist); |
50656eec | 1792 | close(fd); |
146a1439 | 1793 | return ret; |
50656eec | 1794 | } |
fa28244d | 1795 | |
0e60836b SD |
1796 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
1797 | struct probe_trace_event **tevs, | |
4eced234 | 1798 | int max_tevs, const char *target) |
e0faa8d3 MH |
1799 | { |
1800 | struct symbol *sym; | |
e334016f | 1801 | int ret = 0, i; |
0e60836b | 1802 | struct probe_trace_event *tev; |
4235b045 | 1803 | |
4b4da7f7 | 1804 | /* Convert perf_probe_event with debuginfo */ |
4eced234 | 1805 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, target); |
e334016f | 1806 | if (ret != 0) |
190b57fc | 1807 | return ret; /* Found in debuginfo or got an error */ |
e0faa8d3 | 1808 | |
4235b045 | 1809 | /* Allocate trace event buffer */ |
0e60836b | 1810 | tev = *tevs = zalloc(sizeof(struct probe_trace_event)); |
e334016f MH |
1811 | if (tev == NULL) |
1812 | return -ENOMEM; | |
4235b045 MH |
1813 | |
1814 | /* Copy parameters */ | |
02b95dad MH |
1815 | tev->point.symbol = strdup(pev->point.function); |
1816 | if (tev->point.symbol == NULL) { | |
1817 | ret = -ENOMEM; | |
1818 | goto error; | |
1819 | } | |
ce27a443 | 1820 | |
4eced234 SD |
1821 | if (target) { |
1822 | tev->point.module = strdup(target); | |
ce27a443 JZ |
1823 | if (tev->point.module == NULL) { |
1824 | ret = -ENOMEM; | |
1825 | goto error; | |
1826 | } | |
190b57fc | 1827 | } |
ce27a443 | 1828 | |
4235b045 | 1829 | tev->point.offset = pev->point.offset; |
04ddd04b | 1830 | tev->point.retprobe = pev->point.retprobe; |
4235b045 MH |
1831 | tev->nargs = pev->nargs; |
1832 | if (tev->nargs) { | |
0e60836b | 1833 | tev->args = zalloc(sizeof(struct probe_trace_arg) |
e334016f MH |
1834 | * tev->nargs); |
1835 | if (tev->args == NULL) { | |
02b95dad MH |
1836 | ret = -ENOMEM; |
1837 | goto error; | |
e334016f | 1838 | } |
48481938 | 1839 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1840 | if (pev->args[i].name) { |
1841 | tev->args[i].name = strdup(pev->args[i].name); | |
1842 | if (tev->args[i].name == NULL) { | |
1843 | ret = -ENOMEM; | |
1844 | goto error; | |
1845 | } | |
1846 | } | |
1847 | tev->args[i].value = strdup(pev->args[i].var); | |
1848 | if (tev->args[i].value == NULL) { | |
1849 | ret = -ENOMEM; | |
1850 | goto error; | |
1851 | } | |
1852 | if (pev->args[i].type) { | |
1853 | tev->args[i].type = strdup(pev->args[i].type); | |
1854 | if (tev->args[i].type == NULL) { | |
1855 | ret = -ENOMEM; | |
1856 | goto error; | |
1857 | } | |
1858 | } | |
48481938 | 1859 | } |
4235b045 MH |
1860 | } |
1861 | ||
1862 | /* Currently just checking function name from symbol map */ | |
469b9b88 | 1863 | sym = __find_kernel_function_by_name(tev->point.symbol, NULL); |
146a1439 MH |
1864 | if (!sym) { |
1865 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1866 | tev->point.symbol); | |
02b95dad MH |
1867 | ret = -ENOENT; |
1868 | goto error; | |
1c1bc922 PN |
1869 | } else if (tev->point.offset > sym->end - sym->start) { |
1870 | pr_warning("Offset specified is greater than size of %s\n", | |
1871 | tev->point.symbol); | |
1872 | ret = -ENOENT; | |
1873 | goto error; | |
1874 | ||
02b95dad | 1875 | } |
e334016f | 1876 | |
02b95dad MH |
1877 | return 1; |
1878 | error: | |
0e60836b | 1879 | clear_probe_trace_event(tev); |
02b95dad MH |
1880 | free(tev); |
1881 | *tevs = NULL; | |
e334016f | 1882 | return ret; |
4235b045 MH |
1883 | } |
1884 | ||
1885 | struct __event_package { | |
1886 | struct perf_probe_event *pev; | |
0e60836b | 1887 | struct probe_trace_event *tevs; |
4235b045 MH |
1888 | int ntevs; |
1889 | }; | |
1890 | ||
146a1439 | 1891 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
4eced234 | 1892 | int max_tevs, const char *target, bool force_add) |
4235b045 | 1893 | { |
146a1439 | 1894 | int i, j, ret; |
4235b045 MH |
1895 | struct __event_package *pkgs; |
1896 | ||
e334016f MH |
1897 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
1898 | if (pkgs == NULL) | |
1899 | return -ENOMEM; | |
4235b045 MH |
1900 | |
1901 | /* Init vmlinux path */ | |
146a1439 | 1902 | ret = init_vmlinux(); |
449e5b24 MH |
1903 | if (ret < 0) { |
1904 | free(pkgs); | |
146a1439 | 1905 | return ret; |
449e5b24 | 1906 | } |
4235b045 MH |
1907 | |
1908 | /* Loop 1: convert all events */ | |
1909 | for (i = 0; i < npevs; i++) { | |
1910 | pkgs[i].pev = &pevs[i]; | |
1911 | /* Convert with or without debuginfo */ | |
0e60836b | 1912 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
1913 | &pkgs[i].tevs, |
1914 | max_tevs, | |
4eced234 | 1915 | target); |
146a1439 MH |
1916 | if (ret < 0) |
1917 | goto end; | |
1918 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
1919 | } |
1920 | ||
4235b045 | 1921 | /* Loop 2: add all events */ |
8635bf6e | 1922 | for (i = 0; i < npevs; i++) { |
0e60836b | 1923 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 | 1924 | pkgs[i].ntevs, force_add); |
fbee632d ACM |
1925 | if (ret < 0) |
1926 | break; | |
1927 | } | |
146a1439 | 1928 | end: |
449e5b24 MH |
1929 | /* Loop 3: cleanup and free trace events */ |
1930 | for (i = 0; i < npevs; i++) { | |
146a1439 | 1931 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 1932 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
449e5b24 MH |
1933 | free(pkgs[i].tevs); |
1934 | } | |
1935 | free(pkgs); | |
146a1439 MH |
1936 | |
1937 | return ret; | |
e0faa8d3 MH |
1938 | } |
1939 | ||
0e60836b | 1940 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
1941 | { |
1942 | char *p; | |
1943 | char buf[128]; | |
4235b045 | 1944 | int ret; |
bbbb521b | 1945 | |
0e60836b | 1946 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
1947 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
1948 | if (ret < 0) | |
1949 | goto error; | |
1950 | ||
bbbb521b | 1951 | p = strchr(buf + 2, ':'); |
146a1439 MH |
1952 | if (!p) { |
1953 | pr_debug("Internal error: %s should have ':' but not.\n", | |
1954 | ent->s); | |
1955 | ret = -ENOTSUP; | |
1956 | goto error; | |
1957 | } | |
bbbb521b MH |
1958 | *p = '/'; |
1959 | ||
4235b045 MH |
1960 | pr_debug("Writing event: %s\n", buf); |
1961 | ret = write(fd, buf, strlen(buf)); | |
44a56040 MH |
1962 | if (ret < 0) { |
1963 | ret = -errno; | |
146a1439 | 1964 | goto error; |
44a56040 | 1965 | } |
146a1439 | 1966 | |
a844d1ef | 1967 | printf("Removed event: %s\n", ent->s); |
146a1439 MH |
1968 | return 0; |
1969 | error: | |
1970 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
1971 | return ret; | |
bbbb521b MH |
1972 | } |
1973 | ||
0e60836b | 1974 | static int del_trace_probe_event(int fd, const char *group, |
146a1439 | 1975 | const char *event, struct strlist *namelist) |
fa28244d MH |
1976 | { |
1977 | char buf[128]; | |
bbbb521b | 1978 | struct str_node *ent, *n; |
146a1439 | 1979 | int found = 0, ret = 0; |
fa28244d | 1980 | |
146a1439 MH |
1981 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
1982 | if (ret < 0) { | |
0e43e5d2 | 1983 | pr_err("Failed to copy event.\n"); |
146a1439 MH |
1984 | return ret; |
1985 | } | |
fa28244d | 1986 | |
bbbb521b MH |
1987 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
1988 | strlist__for_each_safe(ent, n, namelist) | |
1989 | if (strglobmatch(ent->s, buf)) { | |
1990 | found++; | |
0e60836b | 1991 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
1992 | if (ret < 0) |
1993 | break; | |
bbbb521b MH |
1994 | strlist__remove(namelist, ent); |
1995 | } | |
1996 | } else { | |
1997 | ent = strlist__find(namelist, buf); | |
1998 | if (ent) { | |
1999 | found++; | |
0e60836b | 2000 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
2001 | if (ret >= 0) |
2002 | strlist__remove(namelist, ent); | |
bbbb521b MH |
2003 | } |
2004 | } | |
146a1439 MH |
2005 | if (found == 0 && ret >= 0) |
2006 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
2007 | ||
2008 | return ret; | |
fa28244d MH |
2009 | } |
2010 | ||
146a1439 | 2011 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 2012 | { |
146a1439 | 2013 | int fd, ret = 0; |
fa28244d MH |
2014 | const char *group, *event; |
2015 | char *p, *str; | |
2016 | struct str_node *ent; | |
2017 | struct strlist *namelist; | |
2018 | ||
f4d7da49 | 2019 | fd = open_kprobe_events(true); |
146a1439 MH |
2020 | if (fd < 0) |
2021 | return fd; | |
2022 | ||
fa28244d | 2023 | /* Get current event names */ |
0e60836b | 2024 | namelist = get_probe_trace_event_names(fd, true); |
146a1439 MH |
2025 | if (namelist == NULL) |
2026 | return -EINVAL; | |
fa28244d | 2027 | |
adf365f4 | 2028 | strlist__for_each(ent, dellist) { |
02b95dad MH |
2029 | str = strdup(ent->s); |
2030 | if (str == NULL) { | |
2031 | ret = -ENOMEM; | |
2032 | break; | |
2033 | } | |
bbbb521b | 2034 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
2035 | p = strchr(str, ':'); |
2036 | if (p) { | |
2037 | group = str; | |
2038 | *p = '\0'; | |
2039 | event = p + 1; | |
2040 | } else { | |
bbbb521b | 2041 | group = "*"; |
fa28244d MH |
2042 | event = str; |
2043 | } | |
bbbb521b | 2044 | pr_debug("Group: %s, Event: %s\n", group, event); |
0e60836b | 2045 | ret = del_trace_probe_event(fd, group, event, namelist); |
fa28244d | 2046 | free(str); |
146a1439 MH |
2047 | if (ret < 0) |
2048 | break; | |
fa28244d MH |
2049 | } |
2050 | strlist__delete(namelist); | |
2051 | close(fd); | |
146a1439 MH |
2052 | |
2053 | return ret; | |
fa28244d | 2054 | } |
3c42258c MH |
2055 | /* TODO: don't use a global variable for filter ... */ |
2056 | static struct strfilter *available_func_filter; | |
fa28244d | 2057 | |
e80711ca | 2058 | /* |
3c42258c MH |
2059 | * If a symbol corresponds to a function with global binding and |
2060 | * matches filter return 0. For all others return 1. | |
e80711ca | 2061 | */ |
3c42258c MH |
2062 | static int filter_available_functions(struct map *map __unused, |
2063 | struct symbol *sym) | |
e80711ca | 2064 | { |
3c42258c MH |
2065 | if (sym->binding == STB_GLOBAL && |
2066 | strfilter__compare(available_func_filter, sym->name)) | |
2067 | return 0; | |
2068 | return 1; | |
e80711ca MH |
2069 | } |
2070 | ||
4eced234 | 2071 | int show_available_funcs(const char *target, struct strfilter *_filter) |
e80711ca MH |
2072 | { |
2073 | struct map *map; | |
2074 | int ret; | |
2075 | ||
2076 | setup_pager(); | |
2077 | ||
2078 | ret = init_vmlinux(); | |
2079 | if (ret < 0) | |
2080 | return ret; | |
2081 | ||
4eced234 | 2082 | map = kernel_get_module_map(target); |
e80711ca | 2083 | if (!map) { |
4eced234 | 2084 | pr_err("Failed to find %s map.\n", (target) ? : "kernel"); |
e80711ca MH |
2085 | return -EINVAL; |
2086 | } | |
3c42258c MH |
2087 | available_func_filter = _filter; |
2088 | if (map__load(map, filter_available_functions)) { | |
e80711ca MH |
2089 | pr_err("Failed to load map.\n"); |
2090 | return -EINVAL; | |
2091 | } | |
2092 | if (!dso__sorted_by_name(map->dso, map->type)) | |
2093 | dso__sort_by_name(map->dso, map->type); | |
2094 | ||
2095 | dso__fprintf_symbols_by_name(map->dso, map->type, stdout); | |
2096 | return 0; | |
2097 | } |