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Commit | Line | Data |
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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> | |
50656eec MH |
34 | |
35 | #undef _GNU_SOURCE | |
31facc5f | 36 | #include "util.h" |
50656eec | 37 | #include "event.h" |
e1c01d61 | 38 | #include "string.h" |
4de189fe | 39 | #include "strlist.h" |
50656eec | 40 | #include "debug.h" |
72041334 | 41 | #include "cache.h" |
631c9def | 42 | #include "color.h" |
e0faa8d3 MH |
43 | #include "symbol.h" |
44 | #include "thread.h" | |
7ca5989d | 45 | #include "debugfs.h" |
4b4da7f7 | 46 | #include "trace-event.h" /* For __unused */ |
50656eec | 47 | #include "probe-event.h" |
4235b045 | 48 | #include "probe-finder.h" |
50656eec MH |
49 | |
50 | #define MAX_CMDLEN 256 | |
51 | #define MAX_PROBE_ARGS 128 | |
52 | #define PERFPROBE_GROUP "probe" | |
53 | ||
f4d7da49 MH |
54 | bool probe_event_dry_run; /* Dry run flag */ |
55 | ||
146a1439 | 56 | #define semantic_error(msg ...) pr_err("Semantic error :" msg) |
50656eec | 57 | |
4de189fe | 58 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
59 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
60 | __attribute__((format(printf, 3, 4))); | |
61 | ||
4de189fe MH |
62 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
63 | { | |
64 | int ret; | |
65 | va_list ap; | |
66 | va_start(ap, format); | |
67 | ret = vsnprintf(str, size, format, ap); | |
68 | va_end(ap); | |
69 | if (ret >= (int)size) | |
70 | ret = -E2BIG; | |
71 | return ret; | |
72 | } | |
73 | ||
4b4da7f7 | 74 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp); |
d28c6223 | 75 | static struct machine machine; |
e0faa8d3 | 76 | |
469b9b88 | 77 | /* Initialize symbol maps and path of vmlinux/modules */ |
146a1439 | 78 | static int init_vmlinux(void) |
e0faa8d3 | 79 | { |
146a1439 MH |
80 | int ret; |
81 | ||
e0faa8d3 MH |
82 | symbol_conf.sort_by_name = true; |
83 | if (symbol_conf.vmlinux_name == NULL) | |
84 | symbol_conf.try_vmlinux_path = true; | |
85 | else | |
86 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
146a1439 MH |
87 | ret = symbol__init(); |
88 | if (ret < 0) { | |
89 | pr_debug("Failed to init symbol map.\n"); | |
90 | goto out; | |
91 | } | |
e0faa8d3 | 92 | |
469b9b88 | 93 | ret = machine__init(&machine, "", HOST_KERNEL_ID); |
d28c6223 ACM |
94 | if (ret < 0) |
95 | goto out; | |
96 | ||
469b9b88 | 97 | if (machine__create_kernel_maps(&machine) < 0) { |
0e43e5d2 | 98 | pr_debug("machine__create_kernel_maps() failed.\n"); |
469b9b88 MH |
99 | goto out; |
100 | } | |
146a1439 MH |
101 | out: |
102 | if (ret < 0) | |
103 | pr_warning("Failed to init vmlinux path.\n"); | |
104 | return ret; | |
e0faa8d3 MH |
105 | } |
106 | ||
469b9b88 MH |
107 | static struct symbol *__find_kernel_function_by_name(const char *name, |
108 | struct map **mapp) | |
109 | { | |
110 | return machine__find_kernel_function_by_name(&machine, name, mapp, | |
111 | NULL); | |
112 | } | |
113 | ||
114 | const char *kernel_get_module_path(const char *module) | |
115 | { | |
116 | struct dso *dso; | |
117 | ||
118 | if (module) { | |
119 | list_for_each_entry(dso, &machine.kernel_dsos, node) { | |
120 | if (strncmp(dso->short_name + 1, module, | |
121 | dso->short_name_len - 2) == 0) | |
122 | goto found; | |
123 | } | |
124 | pr_debug("Failed to find module %s.\n", module); | |
125 | return NULL; | |
126 | } else { | |
127 | dso = machine.vmlinux_maps[MAP__FUNCTION]->dso; | |
128 | if (dso__load_vmlinux_path(dso, | |
129 | machine.vmlinux_maps[MAP__FUNCTION], NULL) < 0) { | |
130 | pr_debug("Failed to load kernel map.\n"); | |
131 | return NULL; | |
132 | } | |
133 | } | |
134 | found: | |
135 | return dso->long_name; | |
136 | } | |
137 | ||
4b4da7f7 | 138 | #ifdef DWARF_SUPPORT |
469b9b88 | 139 | static int open_vmlinux(const char *module) |
e0faa8d3 | 140 | { |
469b9b88 MH |
141 | const char *path = kernel_get_module_path(module); |
142 | if (!path) { | |
0e43e5d2 MH |
143 | pr_err("Failed to find path of %s module.\n", |
144 | module ?: "kernel"); | |
469b9b88 | 145 | return -ENOENT; |
e0faa8d3 | 146 | } |
469b9b88 MH |
147 | pr_debug("Try to open %s\n", path); |
148 | return open(path, O_RDONLY); | |
e0faa8d3 | 149 | } |
4b4da7f7 | 150 | |
0e60836b SD |
151 | /* |
152 | * Convert trace point to probe point with debuginfo | |
153 | * Currently only handles kprobes. | |
154 | */ | |
155 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, | |
469b9b88 | 156 | struct perf_probe_point *pp) |
4b4da7f7 MH |
157 | { |
158 | struct symbol *sym; | |
469b9b88 MH |
159 | struct map *map; |
160 | u64 addr; | |
161 | int ret = -ENOENT; | |
4b4da7f7 | 162 | |
469b9b88 | 163 | sym = __find_kernel_function_by_name(tp->symbol, &map); |
4b4da7f7 | 164 | if (sym) { |
469b9b88 MH |
165 | addr = map->unmap_ip(map, sym->start + tp->offset); |
166 | pr_debug("try to find %s+%ld@%llx\n", tp->symbol, | |
167 | tp->offset, addr); | |
168 | ret = find_perf_probe_point((unsigned long)addr, pp); | |
4b4da7f7 MH |
169 | } |
170 | if (ret <= 0) { | |
146a1439 MH |
171 | pr_debug("Failed to find corresponding probes from " |
172 | "debuginfo. Use kprobe event information.\n"); | |
02b95dad MH |
173 | pp->function = strdup(tp->symbol); |
174 | if (pp->function == NULL) | |
175 | return -ENOMEM; | |
4b4da7f7 MH |
176 | pp->offset = tp->offset; |
177 | } | |
178 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
179 | |
180 | return 0; | |
4b4da7f7 MH |
181 | } |
182 | ||
183 | /* Try to find perf_probe_event with debuginfo */ | |
0e60836b SD |
184 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
185 | struct probe_trace_event **tevs, | |
469b9b88 | 186 | int max_tevs, const char *module) |
4b4da7f7 MH |
187 | { |
188 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
189 | int fd, ntevs; | |
190 | ||
469b9b88 | 191 | fd = open_vmlinux(module); |
4b4da7f7 | 192 | if (fd < 0) { |
146a1439 MH |
193 | if (need_dwarf) { |
194 | pr_warning("Failed to open debuginfo file.\n"); | |
195 | return fd; | |
196 | } | |
4b4da7f7 MH |
197 | pr_debug("Could not open vmlinux. Try to use symbols.\n"); |
198 | return 0; | |
199 | } | |
200 | ||
201 | /* Searching trace events corresponding to probe event */ | |
0e60836b | 202 | ntevs = find_probe_trace_events(fd, pev, tevs, max_tevs); |
4b4da7f7 MH |
203 | close(fd); |
204 | ||
146a1439 | 205 | if (ntevs > 0) { /* Succeeded to find trace events */ |
0e60836b | 206 | pr_debug("find %d probe_trace_events.\n", ntevs); |
4b4da7f7 | 207 | return ntevs; |
146a1439 | 208 | } |
4b4da7f7 | 209 | |
146a1439 MH |
210 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
211 | pr_warning("Probe point '%s' not found.\n", | |
212 | synthesize_perf_probe_point(&pev->point)); | |
213 | return -ENOENT; | |
214 | } | |
215 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
216 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
217 | if (ntevs == -EBADF) { | |
218 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
219 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
220 | if (!need_dwarf) { | |
0e43e5d2 | 221 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
222 | return 0; |
223 | } | |
4b4da7f7 | 224 | } |
15eca306 | 225 | return ntevs; |
4b4da7f7 MH |
226 | } |
227 | ||
7cf0b79e MH |
228 | /* |
229 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
230 | * and chop off leading directories that do not exist. Result is passed back as | |
231 | * a newly allocated path on success. | |
232 | * Return 0 if file was found and readable, -errno otherwise. | |
233 | */ | |
6a330a3c MH |
234 | static int get_real_path(const char *raw_path, const char *comp_dir, |
235 | char **new_path) | |
7cf0b79e | 236 | { |
6a330a3c MH |
237 | const char *prefix = symbol_conf.source_prefix; |
238 | ||
239 | if (!prefix) { | |
240 | if (raw_path[0] != '/' && comp_dir) | |
241 | /* If not an absolute path, try to use comp_dir */ | |
242 | prefix = comp_dir; | |
243 | else { | |
244 | if (access(raw_path, R_OK) == 0) { | |
245 | *new_path = strdup(raw_path); | |
246 | return 0; | |
247 | } else | |
248 | return -errno; | |
249 | } | |
7cf0b79e MH |
250 | } |
251 | ||
6a330a3c | 252 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
7cf0b79e MH |
253 | if (!*new_path) |
254 | return -ENOMEM; | |
255 | ||
256 | for (;;) { | |
6a330a3c | 257 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
7cf0b79e MH |
258 | |
259 | if (access(*new_path, R_OK) == 0) | |
260 | return 0; | |
261 | ||
6a330a3c MH |
262 | if (!symbol_conf.source_prefix) |
263 | /* In case of searching comp_dir, don't retry */ | |
264 | return -errno; | |
265 | ||
7cf0b79e MH |
266 | switch (errno) { |
267 | case ENAMETOOLONG: | |
268 | case ENOENT: | |
269 | case EROFS: | |
270 | case EFAULT: | |
271 | raw_path = strchr(++raw_path, '/'); | |
272 | if (!raw_path) { | |
273 | free(*new_path); | |
274 | *new_path = NULL; | |
275 | return -ENOENT; | |
276 | } | |
277 | continue; | |
278 | ||
279 | default: | |
280 | free(*new_path); | |
281 | *new_path = NULL; | |
282 | return -errno; | |
283 | } | |
284 | } | |
285 | } | |
286 | ||
4b4da7f7 MH |
287 | #define LINEBUF_SIZE 256 |
288 | #define NR_ADDITIONAL_LINES 2 | |
289 | ||
fde52dbd | 290 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
291 | { |
292 | char buf[LINEBUF_SIZE]; | |
befe3414 FBH |
293 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
294 | const char *prefix = NULL; | |
4b4da7f7 | 295 | |
befe3414 | 296 | do { |
4b4da7f7 MH |
297 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
298 | goto error; | |
befe3414 FBH |
299 | if (skip) |
300 | continue; | |
301 | if (!prefix) { | |
302 | prefix = show_num ? "%7d " : " "; | |
303 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 304 | } |
befe3414 FBH |
305 | color_fprintf(stdout, color, "%s", buf); |
306 | ||
307 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 308 | |
fde52dbd | 309 | return 1; |
4b4da7f7 | 310 | error: |
fde52dbd | 311 | if (ferror(fp)) { |
32b2b6ec | 312 | pr_warning("File read error: %s\n", strerror(errno)); |
fde52dbd FBH |
313 | return -1; |
314 | } | |
315 | return 0; | |
316 | } | |
146a1439 | 317 | |
fde52dbd FBH |
318 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
319 | { | |
320 | int rv = __show_one_line(fp, l, skip, show_num); | |
321 | if (rv == 0) { | |
322 | pr_warning("Source file is shorter than expected.\n"); | |
323 | rv = -1; | |
324 | } | |
325 | return rv; | |
4b4da7f7 MH |
326 | } |
327 | ||
fde52dbd FBH |
328 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
329 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
330 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
331 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
332 | ||
4b4da7f7 MH |
333 | /* |
334 | * Show line-range always requires debuginfo to find source file and | |
335 | * line number. | |
336 | */ | |
469b9b88 | 337 | int show_line_range(struct line_range *lr, const char *module) |
4b4da7f7 | 338 | { |
d3b63d7a | 339 | int l = 1; |
4b4da7f7 MH |
340 | struct line_node *ln; |
341 | FILE *fp; | |
342 | int fd, ret; | |
7cf0b79e | 343 | char *tmp; |
4b4da7f7 MH |
344 | |
345 | /* Search a line range */ | |
146a1439 MH |
346 | ret = init_vmlinux(); |
347 | if (ret < 0) | |
348 | return ret; | |
349 | ||
469b9b88 | 350 | fd = open_vmlinux(module); |
146a1439 MH |
351 | if (fd < 0) { |
352 | pr_warning("Failed to open debuginfo file.\n"); | |
353 | return fd; | |
354 | } | |
355 | ||
4b4da7f7 | 356 | ret = find_line_range(fd, lr); |
4b4da7f7 | 357 | close(fd); |
146a1439 MH |
358 | if (ret == 0) { |
359 | pr_warning("Specified source line is not found.\n"); | |
360 | return -ENOENT; | |
361 | } else if (ret < 0) { | |
362 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
363 | return ret; | |
364 | } | |
4b4da7f7 | 365 | |
7cf0b79e MH |
366 | /* Convert source file path */ |
367 | tmp = lr->path; | |
6a330a3c | 368 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
7cf0b79e MH |
369 | free(tmp); /* Free old path */ |
370 | if (ret < 0) { | |
371 | pr_warning("Failed to find source file. (%d)\n", ret); | |
372 | return ret; | |
373 | } | |
374 | ||
4b4da7f7 MH |
375 | setup_pager(); |
376 | ||
377 | if (lr->function) | |
378 | fprintf(stdout, "<%s:%d>\n", lr->function, | |
379 | lr->start - lr->offset); | |
380 | else | |
62c15fc4 | 381 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
382 | |
383 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
384 | if (fp == NULL) { |
385 | pr_warning("Failed to open %s: %s\n", lr->path, | |
386 | strerror(errno)); | |
387 | return -errno; | |
388 | } | |
4b4da7f7 | 389 | /* Skip to starting line number */ |
44b81e92 | 390 | while (l < lr->start) { |
fde52dbd | 391 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
392 | if (ret < 0) |
393 | goto end; | |
394 | } | |
4b4da7f7 MH |
395 | |
396 | list_for_each_entry(ln, &lr->line_list, list) { | |
44b81e92 | 397 | for (; ln->line > l; l++) { |
fde52dbd | 398 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
399 | if (ret < 0) |
400 | goto end; | |
401 | } | |
fde52dbd | 402 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
403 | if (ret < 0) |
404 | goto end; | |
4b4da7f7 MH |
405 | } |
406 | ||
407 | if (lr->end == INT_MAX) | |
408 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
409 | while (l <= lr->end) { |
410 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
411 | if (ret <= 0) | |
44b81e92 FBH |
412 | break; |
413 | } | |
146a1439 | 414 | end: |
4b4da7f7 | 415 | fclose(fp); |
146a1439 | 416 | return ret; |
4b4da7f7 MH |
417 | } |
418 | ||
cf6eb489 | 419 | static int show_available_vars_at(int fd, struct perf_probe_event *pev, |
fb8c5a56 | 420 | int max_vls, bool externs) |
cf6eb489 MH |
421 | { |
422 | char *buf; | |
423 | int ret, i; | |
424 | struct str_node *node; | |
425 | struct variable_list *vls = NULL, *vl; | |
426 | ||
427 | buf = synthesize_perf_probe_point(&pev->point); | |
428 | if (!buf) | |
429 | return -EINVAL; | |
430 | pr_debug("Searching variables at %s\n", buf); | |
431 | ||
fb8c5a56 | 432 | ret = find_available_vars_at(fd, pev, &vls, max_vls, externs); |
cf6eb489 MH |
433 | if (ret > 0) { |
434 | /* Some variables were found */ | |
435 | fprintf(stdout, "Available variables at %s\n", buf); | |
436 | for (i = 0; i < ret; i++) { | |
437 | vl = &vls[i]; | |
438 | /* | |
439 | * A probe point might be converted to | |
440 | * several trace points. | |
441 | */ | |
442 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
443 | vl->point.offset); | |
444 | free(vl->point.symbol); | |
445 | if (vl->vars) { | |
446 | strlist__for_each(node, vl->vars) | |
447 | fprintf(stdout, "\t\t%s\n", node->s); | |
448 | strlist__delete(vl->vars); | |
449 | } else | |
450 | fprintf(stdout, "(No variables)\n"); | |
451 | } | |
452 | free(vls); | |
453 | } else | |
454 | pr_err("Failed to find variables at %s (%d)\n", buf, ret); | |
455 | ||
456 | free(buf); | |
457 | return ret; | |
458 | } | |
459 | ||
460 | /* Show available variables on given probe point */ | |
461 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
469b9b88 | 462 | int max_vls, const char *module, bool externs) |
cf6eb489 MH |
463 | { |
464 | int i, fd, ret = 0; | |
465 | ||
466 | ret = init_vmlinux(); | |
467 | if (ret < 0) | |
468 | return ret; | |
469 | ||
469b9b88 | 470 | fd = open_vmlinux(module); |
cf6eb489 | 471 | if (fd < 0) { |
0e43e5d2 | 472 | pr_warning("Failed to open debug information file.\n"); |
cf6eb489 MH |
473 | return fd; |
474 | } | |
475 | ||
476 | setup_pager(); | |
477 | ||
478 | for (i = 0; i < npevs && ret >= 0; i++) | |
fb8c5a56 | 479 | ret = show_available_vars_at(fd, &pevs[i], max_vls, externs); |
cf6eb489 MH |
480 | |
481 | close(fd); | |
482 | return ret; | |
483 | } | |
484 | ||
4b4da7f7 MH |
485 | #else /* !DWARF_SUPPORT */ |
486 | ||
0e60836b | 487 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, |
469b9b88 | 488 | struct perf_probe_point *pp) |
4b4da7f7 | 489 | { |
469b9b88 MH |
490 | struct symbol *sym; |
491 | ||
492 | sym = __find_kernel_function_by_name(tp->symbol, NULL); | |
493 | if (!sym) { | |
494 | pr_err("Failed to find symbol %s in kernel.\n", tp->symbol); | |
495 | return -ENOENT; | |
496 | } | |
02b95dad MH |
497 | pp->function = strdup(tp->symbol); |
498 | if (pp->function == NULL) | |
499 | return -ENOMEM; | |
4b4da7f7 MH |
500 | pp->offset = tp->offset; |
501 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
502 | |
503 | return 0; | |
4b4da7f7 MH |
504 | } |
505 | ||
0e60836b SD |
506 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
507 | struct probe_trace_event **tevs __unused, | |
469b9b88 | 508 | int max_tevs __unused, const char *mod __unused) |
4b4da7f7 | 509 | { |
146a1439 MH |
510 | if (perf_probe_event_need_dwarf(pev)) { |
511 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
512 | return -ENOSYS; | |
513 | } | |
4b4da7f7 MH |
514 | return 0; |
515 | } | |
516 | ||
469b9b88 | 517 | int show_line_range(struct line_range *lr __unused, const char *module __unused) |
4b4da7f7 | 518 | { |
146a1439 MH |
519 | pr_warning("Debuginfo-analysis is not supported.\n"); |
520 | return -ENOSYS; | |
4b4da7f7 MH |
521 | } |
522 | ||
cf6eb489 | 523 | int show_available_vars(struct perf_probe_event *pevs __unused, |
469b9b88 MH |
524 | int npevs __unused, int max_vls __unused, |
525 | const char *module __unused, bool externs __unused) | |
cf6eb489 MH |
526 | { |
527 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
528 | return -ENOSYS; | |
529 | } | |
e0faa8d3 MH |
530 | #endif |
531 | ||
21dd9ae5 FBH |
532 | static int parse_line_num(char **ptr, int *val, const char *what) |
533 | { | |
534 | const char *start = *ptr; | |
535 | ||
536 | errno = 0; | |
537 | *val = strtol(*ptr, ptr, 0); | |
538 | if (errno || *ptr == start) { | |
539 | semantic_error("'%s' is not a valid number.\n", what); | |
540 | return -EINVAL; | |
541 | } | |
542 | return 0; | |
543 | } | |
544 | ||
9d95b580 FBH |
545 | /* |
546 | * Stuff 'lr' according to the line range described by 'arg'. | |
547 | * The line range syntax is described by: | |
548 | * | |
549 | * SRC[:SLN[+NUM|-ELN]] | |
550 | * FNC[:SLN[+NUM|-ELN]] | |
551 | */ | |
146a1439 | 552 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 553 | { |
21dd9ae5 FBH |
554 | char *range, *name = strdup(arg); |
555 | int err; | |
556 | ||
557 | if (!name) | |
558 | return -ENOMEM; | |
559 | ||
560 | lr->start = 0; | |
561 | lr->end = INT_MAX; | |
562 | ||
563 | range = strchr(name, ':'); | |
564 | if (range) { | |
565 | *range++ = '\0'; | |
566 | ||
567 | err = parse_line_num(&range, &lr->start, "start line"); | |
568 | if (err) | |
569 | goto err; | |
570 | ||
571 | if (*range == '+' || *range == '-') { | |
572 | const char c = *range++; | |
573 | ||
574 | err = parse_line_num(&range, &lr->end, "end line"); | |
575 | if (err) | |
576 | goto err; | |
577 | ||
578 | if (c == '+') { | |
579 | lr->end += lr->start; | |
580 | /* | |
581 | * Adjust the number of lines here. | |
582 | * If the number of lines == 1, the | |
583 | * the end of line should be equal to | |
584 | * the start of line. | |
585 | */ | |
586 | lr->end--; | |
587 | } | |
588 | } | |
9d95b580 | 589 | |
d3b63d7a | 590 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
591 | |
592 | err = -EINVAL; | |
d3b63d7a | 593 | if (lr->start > lr->end) { |
631c9def | 594 | semantic_error("Start line must be smaller" |
146a1439 | 595 | " than end line.\n"); |
21dd9ae5 | 596 | goto err; |
146a1439 | 597 | } |
21dd9ae5 FBH |
598 | if (*range != '\0') { |
599 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
600 | goto err; | |
146a1439 | 601 | } |
d3b63d7a | 602 | } |
02b95dad | 603 | |
21dd9ae5 FBH |
604 | if (strchr(name, '.')) |
605 | lr->file = name; | |
631c9def | 606 | else |
21dd9ae5 | 607 | lr->function = name; |
146a1439 MH |
608 | |
609 | return 0; | |
21dd9ae5 FBH |
610 | err: |
611 | free(name); | |
612 | return err; | |
631c9def MH |
613 | } |
614 | ||
b7702a21 MH |
615 | /* Check the name is good for event/group */ |
616 | static bool check_event_name(const char *name) | |
617 | { | |
618 | if (!isalpha(*name) && *name != '_') | |
619 | return false; | |
620 | while (*++name != '\0') { | |
621 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
622 | return false; | |
623 | } | |
624 | return true; | |
625 | } | |
626 | ||
50656eec | 627 | /* Parse probepoint definition. */ |
146a1439 | 628 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 629 | { |
4235b045 | 630 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
631 | char *ptr, *tmp; |
632 | char c, nc = 0; | |
633 | /* | |
634 | * <Syntax> | |
2a9c8c36 MH |
635 | * perf probe [EVENT=]SRC[:LN|;PTN] |
636 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
637 | * |
638 | * TODO:Group name support | |
50656eec MH |
639 | */ |
640 | ||
2a9c8c36 MH |
641 | ptr = strpbrk(arg, ";=@+%"); |
642 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
643 | *ptr = '\0'; |
644 | tmp = ptr + 1; | |
146a1439 MH |
645 | if (strchr(arg, ':')) { |
646 | semantic_error("Group name is not supported yet.\n"); | |
647 | return -ENOTSUP; | |
648 | } | |
649 | if (!check_event_name(arg)) { | |
b7702a21 | 650 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
651 | "follow C symbol-naming rule.\n", arg); |
652 | return -EINVAL; | |
653 | } | |
02b95dad MH |
654 | pev->event = strdup(arg); |
655 | if (pev->event == NULL) | |
656 | return -ENOMEM; | |
4235b045 | 657 | pev->group = NULL; |
af663d75 MH |
658 | arg = tmp; |
659 | } | |
660 | ||
2a9c8c36 | 661 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
662 | if (ptr) { |
663 | nc = *ptr; | |
664 | *ptr++ = '\0'; | |
665 | } | |
666 | ||
02b95dad MH |
667 | tmp = strdup(arg); |
668 | if (tmp == NULL) | |
669 | return -ENOMEM; | |
670 | ||
50656eec | 671 | /* Check arg is function or file and copy it */ |
02b95dad MH |
672 | if (strchr(tmp, '.')) /* File */ |
673 | pp->file = tmp; | |
50656eec | 674 | else /* Function */ |
02b95dad | 675 | pp->function = tmp; |
50656eec MH |
676 | |
677 | /* Parse other options */ | |
678 | while (ptr) { | |
679 | arg = ptr; | |
680 | c = nc; | |
2a9c8c36 | 681 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
682 | pp->lazy_line = strdup(arg); |
683 | if (pp->lazy_line == NULL) | |
684 | return -ENOMEM; | |
2a9c8c36 MH |
685 | break; |
686 | } | |
687 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
688 | if (ptr) { |
689 | nc = *ptr; | |
690 | *ptr++ = '\0'; | |
691 | } | |
692 | switch (c) { | |
693 | case ':': /* Line number */ | |
694 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 695 | if (*tmp != '\0') { |
2a9c8c36 | 696 | semantic_error("There is non-digit char" |
146a1439 MH |
697 | " in line number.\n"); |
698 | return -EINVAL; | |
699 | } | |
50656eec MH |
700 | break; |
701 | case '+': /* Byte offset from a symbol */ | |
702 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 703 | if (*tmp != '\0') { |
2a9c8c36 | 704 | semantic_error("There is non-digit character" |
146a1439 MH |
705 | " in offset.\n"); |
706 | return -EINVAL; | |
707 | } | |
50656eec MH |
708 | break; |
709 | case '@': /* File name */ | |
146a1439 MH |
710 | if (pp->file) { |
711 | semantic_error("SRC@SRC is not allowed.\n"); | |
712 | return -EINVAL; | |
713 | } | |
02b95dad MH |
714 | pp->file = strdup(arg); |
715 | if (pp->file == NULL) | |
716 | return -ENOMEM; | |
50656eec MH |
717 | break; |
718 | case '%': /* Probe places */ | |
719 | if (strcmp(arg, "return") == 0) { | |
720 | pp->retprobe = 1; | |
146a1439 MH |
721 | } else { /* Others not supported yet */ |
722 | semantic_error("%%%s is not supported.\n", arg); | |
723 | return -ENOTSUP; | |
724 | } | |
50656eec | 725 | break; |
146a1439 MH |
726 | default: /* Buggy case */ |
727 | pr_err("This program has a bug at %s:%d.\n", | |
728 | __FILE__, __LINE__); | |
729 | return -ENOTSUP; | |
50656eec MH |
730 | break; |
731 | } | |
732 | } | |
733 | ||
734 | /* Exclusion check */ | |
146a1439 | 735 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
736 | semantic_error("Lazy pattern can't be used with" |
737 | " line number.\n"); | |
146a1439 MH |
738 | return -EINVAL; |
739 | } | |
2a9c8c36 | 740 | |
146a1439 | 741 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 742 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
743 | return -EINVAL; |
744 | } | |
2a9c8c36 | 745 | |
146a1439 | 746 | if (pp->line && pp->offset) { |
0e43e5d2 | 747 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
748 | return -EINVAL; |
749 | } | |
50656eec | 750 | |
146a1439 | 751 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 752 | semantic_error("File always requires line number or " |
0e43e5d2 | 753 | "lazy pattern.\n"); |
146a1439 MH |
754 | return -EINVAL; |
755 | } | |
50656eec | 756 | |
146a1439 | 757 | if (pp->offset && !pp->function) { |
0e43e5d2 | 758 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
759 | return -EINVAL; |
760 | } | |
50656eec | 761 | |
146a1439 | 762 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 763 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
764 | return -EINVAL; |
765 | } | |
50656eec | 766 | |
146a1439 | 767 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 768 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 769 | "return probe.\n"); |
146a1439 MH |
770 | return -EINVAL; |
771 | } | |
50656eec | 772 | |
4235b045 | 773 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
774 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
775 | pp->lazy_line); | |
146a1439 | 776 | return 0; |
50656eec MH |
777 | } |
778 | ||
7df2f329 | 779 | /* Parse perf-probe event argument */ |
146a1439 | 780 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 781 | { |
b2a3c12b | 782 | char *tmp, *goodname; |
7df2f329 MH |
783 | struct perf_probe_arg_field **fieldp; |
784 | ||
785 | pr_debug("parsing arg: %s into ", str); | |
786 | ||
48481938 MH |
787 | tmp = strchr(str, '='); |
788 | if (tmp) { | |
02b95dad MH |
789 | arg->name = strndup(str, tmp - str); |
790 | if (arg->name == NULL) | |
791 | return -ENOMEM; | |
11a1ca35 | 792 | pr_debug("name:%s ", arg->name); |
48481938 MH |
793 | str = tmp + 1; |
794 | } | |
795 | ||
11a1ca35 MH |
796 | tmp = strchr(str, ':'); |
797 | if (tmp) { /* Type setting */ | |
798 | *tmp = '\0'; | |
02b95dad MH |
799 | arg->type = strdup(tmp + 1); |
800 | if (arg->type == NULL) | |
801 | return -ENOMEM; | |
11a1ca35 MH |
802 | pr_debug("type:%s ", arg->type); |
803 | } | |
804 | ||
b2a3c12b | 805 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
806 | if (!is_c_varname(str) || !tmp) { |
807 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
808 | arg->var = strdup(str); |
809 | if (arg->var == NULL) | |
810 | return -ENOMEM; | |
48481938 | 811 | pr_debug("%s\n", arg->var); |
146a1439 | 812 | return 0; |
7df2f329 MH |
813 | } |
814 | ||
b2a3c12b | 815 | /* Structure fields or array element */ |
02b95dad MH |
816 | arg->var = strndup(str, tmp - str); |
817 | if (arg->var == NULL) | |
818 | return -ENOMEM; | |
b2a3c12b | 819 | goodname = arg->var; |
48481938 | 820 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
821 | fieldp = &arg->field; |
822 | ||
823 | do { | |
e334016f MH |
824 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
825 | if (*fieldp == NULL) | |
826 | return -ENOMEM; | |
b2a3c12b MH |
827 | if (*tmp == '[') { /* Array */ |
828 | str = tmp; | |
829 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 830 | (*fieldp)->ref = true; |
b2a3c12b MH |
831 | if (*tmp != ']' || tmp == str + 1) { |
832 | semantic_error("Array index must be a" | |
833 | " number.\n"); | |
834 | return -EINVAL; | |
835 | } | |
836 | tmp++; | |
837 | if (*tmp == '\0') | |
838 | tmp = NULL; | |
839 | } else { /* Structure */ | |
840 | if (*tmp == '.') { | |
841 | str = tmp + 1; | |
842 | (*fieldp)->ref = false; | |
843 | } else if (tmp[1] == '>') { | |
844 | str = tmp + 2; | |
845 | (*fieldp)->ref = true; | |
846 | } else { | |
847 | semantic_error("Argument parse error: %s\n", | |
848 | str); | |
849 | return -EINVAL; | |
850 | } | |
851 | tmp = strpbrk(str, "-.["); | |
146a1439 | 852 | } |
7df2f329 | 853 | if (tmp) { |
02b95dad MH |
854 | (*fieldp)->name = strndup(str, tmp - str); |
855 | if ((*fieldp)->name == NULL) | |
856 | return -ENOMEM; | |
b2a3c12b MH |
857 | if (*str != '[') |
858 | goodname = (*fieldp)->name; | |
7df2f329 MH |
859 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
860 | fieldp = &(*fieldp)->next; | |
861 | } | |
862 | } while (tmp); | |
02b95dad MH |
863 | (*fieldp)->name = strdup(str); |
864 | if ((*fieldp)->name == NULL) | |
865 | return -ENOMEM; | |
b2a3c12b MH |
866 | if (*str != '[') |
867 | goodname = (*fieldp)->name; | |
7df2f329 | 868 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 869 | |
b2a3c12b | 870 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 871 | if (!arg->name) { |
b2a3c12b | 872 | arg->name = strdup(goodname); |
02b95dad MH |
873 | if (arg->name == NULL) |
874 | return -ENOMEM; | |
875 | } | |
146a1439 | 876 | return 0; |
7df2f329 MH |
877 | } |
878 | ||
4235b045 | 879 | /* Parse perf-probe event command */ |
146a1439 | 880 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 881 | { |
e1c01d61 | 882 | char **argv; |
146a1439 | 883 | int argc, i, ret = 0; |
fac13fd5 | 884 | |
4235b045 | 885 | argv = argv_split(cmd, &argc); |
146a1439 MH |
886 | if (!argv) { |
887 | pr_debug("Failed to split arguments.\n"); | |
888 | return -ENOMEM; | |
889 | } | |
890 | if (argc - 1 > MAX_PROBE_ARGS) { | |
891 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
892 | ret = -ERANGE; | |
893 | goto out; | |
894 | } | |
50656eec | 895 | /* Parse probe point */ |
146a1439 MH |
896 | ret = parse_perf_probe_point(argv[0], pev); |
897 | if (ret < 0) | |
898 | goto out; | |
50656eec | 899 | |
e1c01d61 | 900 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 901 | pev->nargs = argc - 1; |
e334016f MH |
902 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
903 | if (pev->args == NULL) { | |
904 | ret = -ENOMEM; | |
905 | goto out; | |
906 | } | |
146a1439 MH |
907 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
908 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
909 | if (ret >= 0 && | |
910 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 911 | semantic_error("You can't specify local variable for" |
146a1439 MH |
912 | " kretprobe.\n"); |
913 | ret = -EINVAL; | |
914 | } | |
e1c01d61 | 915 | } |
146a1439 | 916 | out: |
e1c01d61 | 917 | argv_free(argv); |
146a1439 MH |
918 | |
919 | return ret; | |
50656eec MH |
920 | } |
921 | ||
4235b045 MH |
922 | /* Return true if this perf_probe_event requires debuginfo */ |
923 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
924 | { | |
925 | int i; | |
926 | ||
927 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
928 | return true; | |
929 | ||
930 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 931 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
932 | return true; |
933 | ||
934 | return false; | |
935 | } | |
936 | ||
0e60836b SD |
937 | /* Parse probe_events event into struct probe_point */ |
938 | static int parse_probe_trace_command(const char *cmd, | |
939 | struct probe_trace_event *tev) | |
4de189fe | 940 | { |
0e60836b | 941 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
942 | char pr; |
943 | char *p; | |
944 | int ret, i, argc; | |
945 | char **argv; | |
946 | ||
0e60836b | 947 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 948 | argv = argv_split(cmd, &argc); |
146a1439 MH |
949 | if (!argv) { |
950 | pr_debug("Failed to split arguments.\n"); | |
951 | return -ENOMEM; | |
952 | } | |
953 | if (argc < 2) { | |
954 | semantic_error("Too few probe arguments.\n"); | |
955 | ret = -ERANGE; | |
956 | goto out; | |
957 | } | |
4de189fe MH |
958 | |
959 | /* Scan event and group name. */ | |
93aaa45a | 960 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
961 | &pr, (float *)(void *)&tev->group, |
962 | (float *)(void *)&tev->event); | |
146a1439 MH |
963 | if (ret != 3) { |
964 | semantic_error("Failed to parse event name: %s\n", argv[0]); | |
965 | ret = -EINVAL; | |
966 | goto out; | |
967 | } | |
4235b045 | 968 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 969 | |
4235b045 | 970 | tp->retprobe = (pr == 'r'); |
4de189fe MH |
971 | |
972 | /* Scan function name and offset */ | |
4235b045 MH |
973 | ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol, |
974 | &tp->offset); | |
4de189fe | 975 | if (ret == 1) |
4235b045 | 976 | tp->offset = 0; |
4de189fe | 977 | |
4235b045 | 978 | tev->nargs = argc - 2; |
0e60836b | 979 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
980 | if (tev->args == NULL) { |
981 | ret = -ENOMEM; | |
982 | goto out; | |
983 | } | |
4235b045 | 984 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
985 | p = strchr(argv[i + 2], '='); |
986 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
987 | *p++ = '\0'; |
988 | else | |
989 | p = argv[i + 2]; | |
02b95dad | 990 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 991 | /* TODO: parse regs and offset */ |
02b95dad MH |
992 | tev->args[i].value = strdup(p); |
993 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
994 | ret = -ENOMEM; | |
995 | goto out; | |
996 | } | |
4de189fe | 997 | } |
146a1439 MH |
998 | ret = 0; |
999 | out: | |
4de189fe | 1000 | argv_free(argv); |
146a1439 | 1001 | return ret; |
4de189fe MH |
1002 | } |
1003 | ||
7df2f329 MH |
1004 | /* Compose only probe arg */ |
1005 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
1006 | { | |
1007 | struct perf_probe_arg_field *field = pa->field; | |
1008 | int ret; | |
1009 | char *tmp = buf; | |
1010 | ||
48481938 MH |
1011 | if (pa->name && pa->var) |
1012 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
1013 | else | |
1014 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
1015 | if (ret <= 0) |
1016 | goto error; | |
1017 | tmp += ret; | |
1018 | len -= ret; | |
1019 | ||
1020 | while (field) { | |
b2a3c12b MH |
1021 | if (field->name[0] == '[') |
1022 | ret = e_snprintf(tmp, len, "%s", field->name); | |
1023 | else | |
1024 | ret = e_snprintf(tmp, len, "%s%s", | |
1025 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
1026 | if (ret <= 0) |
1027 | goto error; | |
1028 | tmp += ret; | |
1029 | len -= ret; | |
1030 | field = field->next; | |
1031 | } | |
11a1ca35 MH |
1032 | |
1033 | if (pa->type) { | |
1034 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
1035 | if (ret <= 0) | |
1036 | goto error; | |
1037 | tmp += ret; | |
1038 | len -= ret; | |
1039 | } | |
1040 | ||
7df2f329 MH |
1041 | return tmp - buf; |
1042 | error: | |
0e43e5d2 | 1043 | pr_debug("Failed to synthesize perf probe argument: %s\n", |
146a1439 MH |
1044 | strerror(-ret)); |
1045 | return ret; | |
7df2f329 MH |
1046 | } |
1047 | ||
4235b045 MH |
1048 | /* Compose only probe point (not argument) */ |
1049 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1050 | { |
fb1587d8 MH |
1051 | char *buf, *tmp; |
1052 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1053 | int ret, len; | |
4de189fe | 1054 | |
e334016f MH |
1055 | buf = zalloc(MAX_CMDLEN); |
1056 | if (buf == NULL) { | |
1057 | ret = -ENOMEM; | |
1058 | goto error; | |
1059 | } | |
4de189fe | 1060 | if (pp->offset) { |
fb1587d8 | 1061 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1062 | if (ret <= 0) |
1063 | goto error; | |
1064 | } | |
1065 | if (pp->line) { | |
fb1587d8 MH |
1066 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1067 | if (ret <= 0) | |
1068 | goto error; | |
1069 | } | |
1070 | if (pp->file) { | |
dd259c5d | 1071 | len = strlen(pp->file) - 31; |
fb1587d8 MH |
1072 | if (len < 0) |
1073 | len = 0; | |
1074 | tmp = strchr(pp->file + len, '/'); | |
1075 | if (!tmp) | |
dd259c5d | 1076 | tmp = pp->file + len; |
fb1587d8 | 1077 | ret = e_snprintf(file, 32, "@%s", tmp + 1); |
4de189fe MH |
1078 | if (ret <= 0) |
1079 | goto error; | |
1080 | } | |
1081 | ||
1082 | if (pp->function) | |
fb1587d8 MH |
1083 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1084 | offs, pp->retprobe ? "%return" : "", line, | |
1085 | file); | |
4de189fe | 1086 | else |
fb1587d8 | 1087 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1088 | if (ret <= 0) |
1089 | goto error; | |
1090 | ||
1091 | return buf; | |
7ef17aaf | 1092 | error: |
0e43e5d2 | 1093 | pr_debug("Failed to synthesize perf probe point: %s\n", |
146a1439 | 1094 | strerror(-ret)); |
e334016f MH |
1095 | if (buf) |
1096 | free(buf); | |
146a1439 | 1097 | return NULL; |
7ef17aaf MH |
1098 | } |
1099 | ||
4235b045 MH |
1100 | #if 0 |
1101 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1102 | { |
1103 | char *buf; | |
1104 | int i, len, ret; | |
1105 | ||
4235b045 MH |
1106 | buf = synthesize_perf_probe_point(&pev->point); |
1107 | if (!buf) | |
1108 | return NULL; | |
4de189fe | 1109 | |
4235b045 MH |
1110 | len = strlen(buf); |
1111 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1112 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1113 | pev->args[i].name); |
1114 | if (ret <= 0) { | |
1115 | free(buf); | |
1116 | return NULL; | |
1117 | } | |
4de189fe MH |
1118 | len += ret; |
1119 | } | |
4de189fe | 1120 | |
4235b045 MH |
1121 | return buf; |
1122 | } | |
1123 | #endif | |
1124 | ||
0e60836b | 1125 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1126 | char **buf, size_t *buflen, |
1127 | int depth) | |
1128 | { | |
1129 | int ret; | |
1130 | if (ref->next) { | |
0e60836b | 1131 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1132 | buflen, depth + 1); |
1133 | if (depth < 0) | |
1134 | goto out; | |
1135 | } | |
1136 | ||
1137 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1138 | if (ret < 0) | |
1139 | depth = ret; | |
1140 | else { | |
1141 | *buf += ret; | |
1142 | *buflen -= ret; | |
1143 | } | |
1144 | out: | |
1145 | return depth; | |
4de189fe | 1146 | |
4de189fe MH |
1147 | } |
1148 | ||
0e60836b | 1149 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1150 | char *buf, size_t buflen) |
50656eec | 1151 | { |
0e60836b | 1152 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1153 | int ret, depth = 0; |
1154 | char *tmp = buf; | |
1155 | ||
1156 | /* Argument name or separator */ | |
1157 | if (arg->name) | |
1158 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1159 | else | |
1160 | ret = e_snprintf(buf, buflen, " "); | |
1161 | if (ret < 0) | |
1162 | return ret; | |
1163 | buf += ret; | |
1164 | buflen -= ret; | |
1165 | ||
b7dcb857 MH |
1166 | /* Special case: @XXX */ |
1167 | if (arg->value[0] == '@' && arg->ref) | |
1168 | ref = ref->next; | |
1169 | ||
4235b045 | 1170 | /* Dereferencing arguments */ |
b7dcb857 | 1171 | if (ref) { |
0e60836b | 1172 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1173 | &buflen, 1); |
1174 | if (depth < 0) | |
1175 | return depth; | |
1176 | } | |
1177 | ||
1178 | /* Print argument value */ | |
b7dcb857 MH |
1179 | if (arg->value[0] == '@' && arg->ref) |
1180 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1181 | arg->ref->offset); | |
1182 | else | |
1183 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1184 | if (ret < 0) |
1185 | return ret; | |
1186 | buf += ret; | |
1187 | buflen -= ret; | |
1188 | ||
1189 | /* Closing */ | |
1190 | while (depth--) { | |
1191 | ret = e_snprintf(buf, buflen, ")"); | |
1192 | if (ret < 0) | |
1193 | return ret; | |
1194 | buf += ret; | |
1195 | buflen -= ret; | |
1196 | } | |
4984912e MH |
1197 | /* Print argument type */ |
1198 | if (arg->type) { | |
1199 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1200 | if (ret <= 0) | |
1201 | return ret; | |
1202 | buf += ret; | |
1203 | } | |
4235b045 MH |
1204 | |
1205 | return buf - tmp; | |
1206 | } | |
1207 | ||
0e60836b | 1208 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1209 | { |
0e60836b | 1210 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1211 | char *buf; |
1212 | int i, len, ret; | |
1213 | ||
e334016f MH |
1214 | buf = zalloc(MAX_CMDLEN); |
1215 | if (buf == NULL) | |
1216 | return NULL; | |
1217 | ||
4235b045 MH |
1218 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu", |
1219 | tp->retprobe ? 'r' : 'p', | |
1220 | tev->group, tev->event, | |
1221 | tp->symbol, tp->offset); | |
1222 | if (len <= 0) | |
50656eec | 1223 | goto error; |
50656eec | 1224 | |
4235b045 | 1225 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1226 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1227 | MAX_CMDLEN - len); |
4de189fe | 1228 | if (ret <= 0) |
50656eec MH |
1229 | goto error; |
1230 | len += ret; | |
1231 | } | |
50656eec | 1232 | |
4235b045 | 1233 | return buf; |
50656eec | 1234 | error: |
4235b045 MH |
1235 | free(buf); |
1236 | return NULL; | |
1237 | } | |
50656eec | 1238 | |
0e60836b | 1239 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
469b9b88 | 1240 | struct perf_probe_event *pev) |
4235b045 | 1241 | { |
02b95dad | 1242 | char buf[64] = ""; |
146a1439 | 1243 | int i, ret; |
4235b045 | 1244 | |
4b4da7f7 | 1245 | /* Convert event/group name */ |
02b95dad MH |
1246 | pev->event = strdup(tev->event); |
1247 | pev->group = strdup(tev->group); | |
1248 | if (pev->event == NULL || pev->group == NULL) | |
1249 | return -ENOMEM; | |
fb1587d8 | 1250 | |
4b4da7f7 | 1251 | /* Convert trace_point to probe_point */ |
0e60836b | 1252 | ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); |
146a1439 MH |
1253 | if (ret < 0) |
1254 | return ret; | |
4b4da7f7 | 1255 | |
4235b045 MH |
1256 | /* Convert trace_arg to probe_arg */ |
1257 | pev->nargs = tev->nargs; | |
e334016f MH |
1258 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1259 | if (pev->args == NULL) | |
1260 | return -ENOMEM; | |
02b95dad | 1261 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1262 | if (tev->args[i].name) |
02b95dad | 1263 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1264 | else { |
0e60836b | 1265 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1266 | buf, 64); |
02b95dad | 1267 | pev->args[i].name = strdup(buf); |
4235b045 | 1268 | } |
02b95dad MH |
1269 | if (pev->args[i].name == NULL && ret >= 0) |
1270 | ret = -ENOMEM; | |
1271 | } | |
146a1439 MH |
1272 | |
1273 | if (ret < 0) | |
1274 | clear_perf_probe_event(pev); | |
1275 | ||
1276 | return ret; | |
4235b045 MH |
1277 | } |
1278 | ||
1279 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1280 | { | |
1281 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1282 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1283 | int i; |
1284 | ||
1285 | if (pev->event) | |
1286 | free(pev->event); | |
1287 | if (pev->group) | |
1288 | free(pev->group); | |
1289 | if (pp->file) | |
1290 | free(pp->file); | |
1291 | if (pp->function) | |
1292 | free(pp->function); | |
1293 | if (pp->lazy_line) | |
1294 | free(pp->lazy_line); | |
7df2f329 | 1295 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1296 | if (pev->args[i].name) |
1297 | free(pev->args[i].name); | |
48481938 MH |
1298 | if (pev->args[i].var) |
1299 | free(pev->args[i].var); | |
11a1ca35 MH |
1300 | if (pev->args[i].type) |
1301 | free(pev->args[i].type); | |
7df2f329 MH |
1302 | field = pev->args[i].field; |
1303 | while (field) { | |
1304 | next = field->next; | |
1305 | if (field->name) | |
1306 | free(field->name); | |
1307 | free(field); | |
1308 | field = next; | |
1309 | } | |
1310 | } | |
4235b045 MH |
1311 | if (pev->args) |
1312 | free(pev->args); | |
1313 | memset(pev, 0, sizeof(*pev)); | |
1314 | } | |
1315 | ||
0e60836b | 1316 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1317 | { |
0e60836b | 1318 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1319 | int i; |
1320 | ||
1321 | if (tev->event) | |
1322 | free(tev->event); | |
1323 | if (tev->group) | |
1324 | free(tev->group); | |
1325 | if (tev->point.symbol) | |
1326 | free(tev->point.symbol); | |
1327 | for (i = 0; i < tev->nargs; i++) { | |
1328 | if (tev->args[i].name) | |
1329 | free(tev->args[i].name); | |
1330 | if (tev->args[i].value) | |
1331 | free(tev->args[i].value); | |
4984912e MH |
1332 | if (tev->args[i].type) |
1333 | free(tev->args[i].type); | |
4235b045 MH |
1334 | ref = tev->args[i].ref; |
1335 | while (ref) { | |
1336 | next = ref->next; | |
1337 | free(ref); | |
1338 | ref = next; | |
1339 | } | |
1340 | } | |
1341 | if (tev->args) | |
1342 | free(tev->args); | |
1343 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1344 | } |
1345 | ||
f4d7da49 | 1346 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
1347 | { |
1348 | char buf[PATH_MAX]; | |
7ca5989d | 1349 | const char *__debugfs; |
4de189fe MH |
1350 | int ret; |
1351 | ||
7ca5989d MH |
1352 | __debugfs = debugfs_find_mountpoint(); |
1353 | if (__debugfs == NULL) { | |
1354 | pr_warning("Debugfs is not mounted.\n"); | |
1355 | return -ENOENT; | |
1356 | } | |
1357 | ||
1358 | ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); | |
146a1439 | 1359 | if (ret >= 0) { |
7ca5989d | 1360 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1361 | if (readwrite && !probe_event_dry_run) |
1362 | ret = open(buf, O_RDWR, O_APPEND); | |
1363 | else | |
1364 | ret = open(buf, O_RDONLY, 0); | |
1365 | } | |
f4d7da49 | 1366 | |
4de189fe MH |
1367 | if (ret < 0) { |
1368 | if (errno == ENOENT) | |
146a1439 MH |
1369 | pr_warning("kprobe_events file does not exist - please" |
1370 | " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); | |
4de189fe | 1371 | else |
146a1439 MH |
1372 | pr_warning("Failed to open kprobe_events file: %s\n", |
1373 | strerror(errno)); | |
4de189fe MH |
1374 | } |
1375 | return ret; | |
1376 | } | |
1377 | ||
1378 | /* Get raw string list of current kprobe_events */ | |
0e60836b | 1379 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1380 | { |
1381 | int ret, idx; | |
1382 | FILE *fp; | |
1383 | char buf[MAX_CMDLEN]; | |
1384 | char *p; | |
1385 | struct strlist *sl; | |
1386 | ||
1387 | sl = strlist__new(true, NULL); | |
1388 | ||
1389 | fp = fdopen(dup(fd), "r"); | |
1390 | while (!feof(fp)) { | |
1391 | p = fgets(buf, MAX_CMDLEN, fp); | |
1392 | if (!p) | |
1393 | break; | |
1394 | ||
1395 | idx = strlen(p) - 1; | |
1396 | if (p[idx] == '\n') | |
1397 | p[idx] = '\0'; | |
1398 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1399 | if (ret < 0) { |
1400 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1401 | strlist__delete(sl); | |
1402 | return NULL; | |
1403 | } | |
4de189fe MH |
1404 | } |
1405 | fclose(fp); | |
1406 | ||
1407 | return sl; | |
1408 | } | |
1409 | ||
278498d4 | 1410 | /* Show an event */ |
146a1439 | 1411 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1412 | { |
7e990a51 | 1413 | int i, ret; |
278498d4 | 1414 | char buf[128]; |
4235b045 | 1415 | char *place; |
278498d4 | 1416 | |
4235b045 MH |
1417 | /* Synthesize only event probe point */ |
1418 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1419 | if (!place) |
1420 | return -EINVAL; | |
4235b045 MH |
1421 | |
1422 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1423 | if (ret < 0) |
146a1439 MH |
1424 | return ret; |
1425 | ||
fb1587d8 | 1426 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1427 | |
4235b045 | 1428 | if (pev->nargs > 0) { |
278498d4 | 1429 | printf(" with"); |
7df2f329 | 1430 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1431 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1432 | buf, 128); | |
1433 | if (ret < 0) | |
1434 | break; | |
7df2f329 MH |
1435 | printf(" %s", buf); |
1436 | } | |
278498d4 MH |
1437 | } |
1438 | printf(")\n"); | |
4235b045 | 1439 | free(place); |
146a1439 | 1440 | return ret; |
278498d4 MH |
1441 | } |
1442 | ||
4de189fe | 1443 | /* List up current perf-probe events */ |
146a1439 | 1444 | int show_perf_probe_events(void) |
4de189fe | 1445 | { |
146a1439 | 1446 | int fd, ret; |
0e60836b | 1447 | struct probe_trace_event tev; |
4235b045 | 1448 | struct perf_probe_event pev; |
4de189fe MH |
1449 | struct strlist *rawlist; |
1450 | struct str_node *ent; | |
1451 | ||
72041334 | 1452 | setup_pager(); |
146a1439 MH |
1453 | ret = init_vmlinux(); |
1454 | if (ret < 0) | |
1455 | return ret; | |
4235b045 MH |
1456 | |
1457 | memset(&tev, 0, sizeof(tev)); | |
1458 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1459 | |
f4d7da49 | 1460 | fd = open_kprobe_events(false); |
146a1439 MH |
1461 | if (fd < 0) |
1462 | return fd; | |
1463 | ||
0e60836b | 1464 | rawlist = get_probe_trace_command_rawlist(fd); |
4de189fe | 1465 | close(fd); |
146a1439 MH |
1466 | if (!rawlist) |
1467 | return -ENOENT; | |
4de189fe | 1468 | |
adf365f4 | 1469 | strlist__for_each(ent, rawlist) { |
0e60836b | 1470 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1471 | if (ret >= 0) { |
1472 | ret = convert_to_perf_probe_event(&tev, &pev); | |
1473 | if (ret >= 0) | |
1474 | ret = show_perf_probe_event(&pev); | |
1475 | } | |
4235b045 | 1476 | clear_perf_probe_event(&pev); |
0e60836b | 1477 | clear_probe_trace_event(&tev); |
146a1439 MH |
1478 | if (ret < 0) |
1479 | break; | |
4de189fe | 1480 | } |
4de189fe | 1481 | strlist__delete(rawlist); |
146a1439 MH |
1482 | |
1483 | return ret; | |
4de189fe MH |
1484 | } |
1485 | ||
b498ce1f | 1486 | /* Get current perf-probe event names */ |
0e60836b | 1487 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1488 | { |
fa28244d | 1489 | char buf[128]; |
b498ce1f MH |
1490 | struct strlist *sl, *rawlist; |
1491 | struct str_node *ent; | |
0e60836b | 1492 | struct probe_trace_event tev; |
146a1439 | 1493 | int ret = 0; |
b498ce1f | 1494 | |
4235b045 | 1495 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 1496 | rawlist = get_probe_trace_command_rawlist(fd); |
e1d2017b | 1497 | sl = strlist__new(true, NULL); |
adf365f4 | 1498 | strlist__for_each(ent, rawlist) { |
0e60836b | 1499 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1500 | if (ret < 0) |
1501 | break; | |
fa28244d | 1502 | if (include_group) { |
146a1439 MH |
1503 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1504 | tev.event); | |
1505 | if (ret >= 0) | |
1506 | ret = strlist__add(sl, buf); | |
fa28244d | 1507 | } else |
146a1439 | 1508 | ret = strlist__add(sl, tev.event); |
0e60836b | 1509 | clear_probe_trace_event(&tev); |
146a1439 MH |
1510 | if (ret < 0) |
1511 | break; | |
b498ce1f | 1512 | } |
b498ce1f MH |
1513 | strlist__delete(rawlist); |
1514 | ||
146a1439 MH |
1515 | if (ret < 0) { |
1516 | strlist__delete(sl); | |
1517 | return NULL; | |
1518 | } | |
b498ce1f MH |
1519 | return sl; |
1520 | } | |
1521 | ||
0e60836b | 1522 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 1523 | { |
6eca8cc3 | 1524 | int ret = 0; |
0e60836b | 1525 | char *buf = synthesize_probe_trace_command(tev); |
50656eec | 1526 | |
146a1439 | 1527 | if (!buf) { |
0e60836b | 1528 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
1529 | return -EINVAL; |
1530 | } | |
1531 | ||
fa28244d | 1532 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1533 | if (!probe_event_dry_run) { |
1534 | ret = write(fd, buf, strlen(buf)); | |
1535 | if (ret <= 0) | |
146a1439 MH |
1536 | pr_warning("Failed to write event: %s\n", |
1537 | strerror(errno)); | |
f4d7da49 | 1538 | } |
4235b045 | 1539 | free(buf); |
146a1439 | 1540 | return ret; |
50656eec MH |
1541 | } |
1542 | ||
146a1439 MH |
1543 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1544 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1545 | { |
1546 | int i, ret; | |
17f88fcd MH |
1547 | |
1548 | /* Try no suffix */ | |
1549 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1550 | if (ret < 0) { |
1551 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1552 | return ret; | |
1553 | } | |
17f88fcd | 1554 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1555 | return 0; |
17f88fcd | 1556 | |
d761b08b MH |
1557 | if (!allow_suffix) { |
1558 | pr_warning("Error: event \"%s\" already exists. " | |
1559 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1560 | return -EEXIST; |
d761b08b MH |
1561 | } |
1562 | ||
17f88fcd MH |
1563 | /* Try to add suffix */ |
1564 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1565 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1566 | if (ret < 0) { |
1567 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1568 | return ret; | |
1569 | } | |
b498ce1f MH |
1570 | if (!strlist__has_entry(namelist, buf)) |
1571 | break; | |
1572 | } | |
146a1439 MH |
1573 | if (i == MAX_EVENT_INDEX) { |
1574 | pr_warning("Too many events are on the same function.\n"); | |
1575 | ret = -ERANGE; | |
1576 | } | |
1577 | ||
1578 | return ret; | |
b498ce1f MH |
1579 | } |
1580 | ||
0e60836b SD |
1581 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
1582 | struct probe_trace_event *tevs, | |
146a1439 | 1583 | int ntevs, bool allow_suffix) |
50656eec | 1584 | { |
146a1439 | 1585 | int i, fd, ret; |
0e60836b | 1586 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
1587 | char buf[64]; |
1588 | const char *event, *group; | |
b498ce1f | 1589 | struct strlist *namelist; |
50656eec | 1590 | |
f4d7da49 | 1591 | fd = open_kprobe_events(true); |
146a1439 MH |
1592 | if (fd < 0) |
1593 | return fd; | |
b498ce1f | 1594 | /* Get current event names */ |
0e60836b | 1595 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
1596 | if (!namelist) { |
1597 | pr_debug("Failed to get current event list.\n"); | |
1598 | return -EIO; | |
1599 | } | |
4235b045 | 1600 | |
146a1439 | 1601 | ret = 0; |
4235b045 | 1602 | printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1603 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1604 | tev = &tevs[i]; |
1605 | if (pev->event) | |
1606 | event = pev->event; | |
1607 | else | |
1608 | if (pev->point.function) | |
1609 | event = pev->point.function; | |
1610 | else | |
1611 | event = tev->point.symbol; | |
1612 | if (pev->group) | |
1613 | group = pev->group; | |
1614 | else | |
1615 | group = PERFPROBE_GROUP; | |
1616 | ||
1617 | /* Get an unused new event name */ | |
146a1439 MH |
1618 | ret = get_new_event_name(buf, 64, event, |
1619 | namelist, allow_suffix); | |
1620 | if (ret < 0) | |
1621 | break; | |
4235b045 MH |
1622 | event = buf; |
1623 | ||
02b95dad MH |
1624 | tev->event = strdup(event); |
1625 | tev->group = strdup(group); | |
1626 | if (tev->event == NULL || tev->group == NULL) { | |
1627 | ret = -ENOMEM; | |
1628 | break; | |
1629 | } | |
0e60836b | 1630 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
1631 | if (ret < 0) |
1632 | break; | |
4235b045 MH |
1633 | /* Add added event name to namelist */ |
1634 | strlist__add(namelist, event); | |
1635 | ||
1636 | /* Trick here - save current event/group */ | |
1637 | event = pev->event; | |
1638 | group = pev->group; | |
1639 | pev->event = tev->event; | |
1640 | pev->group = tev->group; | |
1641 | show_perf_probe_event(pev); | |
1642 | /* Trick here - restore current event/group */ | |
1643 | pev->event = (char *)event; | |
1644 | pev->group = (char *)group; | |
1645 | ||
1646 | /* | |
1647 | * Probes after the first probe which comes from same | |
1648 | * user input are always allowed to add suffix, because | |
1649 | * there might be several addresses corresponding to | |
1650 | * one code line. | |
1651 | */ | |
1652 | allow_suffix = true; | |
50656eec | 1653 | } |
146a1439 MH |
1654 | |
1655 | if (ret >= 0) { | |
1656 | /* Show how to use the event. */ | |
1657 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
1658 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
1659 | tev->event); | |
1660 | } | |
a9b495b0 | 1661 | |
e1d2017b | 1662 | strlist__delete(namelist); |
50656eec | 1663 | close(fd); |
146a1439 | 1664 | return ret; |
50656eec | 1665 | } |
fa28244d | 1666 | |
0e60836b SD |
1667 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
1668 | struct probe_trace_event **tevs, | |
469b9b88 | 1669 | int max_tevs, const char *module) |
e0faa8d3 MH |
1670 | { |
1671 | struct symbol *sym; | |
e334016f | 1672 | int ret = 0, i; |
0e60836b | 1673 | struct probe_trace_event *tev; |
4235b045 | 1674 | |
4b4da7f7 | 1675 | /* Convert perf_probe_event with debuginfo */ |
469b9b88 | 1676 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, module); |
e334016f MH |
1677 | if (ret != 0) |
1678 | return ret; | |
e0faa8d3 | 1679 | |
4235b045 | 1680 | /* Allocate trace event buffer */ |
0e60836b | 1681 | tev = *tevs = zalloc(sizeof(struct probe_trace_event)); |
e334016f MH |
1682 | if (tev == NULL) |
1683 | return -ENOMEM; | |
4235b045 MH |
1684 | |
1685 | /* Copy parameters */ | |
02b95dad MH |
1686 | tev->point.symbol = strdup(pev->point.function); |
1687 | if (tev->point.symbol == NULL) { | |
1688 | ret = -ENOMEM; | |
1689 | goto error; | |
1690 | } | |
4235b045 | 1691 | tev->point.offset = pev->point.offset; |
04ddd04b | 1692 | tev->point.retprobe = pev->point.retprobe; |
4235b045 MH |
1693 | tev->nargs = pev->nargs; |
1694 | if (tev->nargs) { | |
0e60836b | 1695 | tev->args = zalloc(sizeof(struct probe_trace_arg) |
e334016f MH |
1696 | * tev->nargs); |
1697 | if (tev->args == NULL) { | |
02b95dad MH |
1698 | ret = -ENOMEM; |
1699 | goto error; | |
e334016f | 1700 | } |
48481938 | 1701 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1702 | if (pev->args[i].name) { |
1703 | tev->args[i].name = strdup(pev->args[i].name); | |
1704 | if (tev->args[i].name == NULL) { | |
1705 | ret = -ENOMEM; | |
1706 | goto error; | |
1707 | } | |
1708 | } | |
1709 | tev->args[i].value = strdup(pev->args[i].var); | |
1710 | if (tev->args[i].value == NULL) { | |
1711 | ret = -ENOMEM; | |
1712 | goto error; | |
1713 | } | |
1714 | if (pev->args[i].type) { | |
1715 | tev->args[i].type = strdup(pev->args[i].type); | |
1716 | if (tev->args[i].type == NULL) { | |
1717 | ret = -ENOMEM; | |
1718 | goto error; | |
1719 | } | |
1720 | } | |
48481938 | 1721 | } |
4235b045 MH |
1722 | } |
1723 | ||
1724 | /* Currently just checking function name from symbol map */ | |
469b9b88 | 1725 | sym = __find_kernel_function_by_name(tev->point.symbol, NULL); |
146a1439 MH |
1726 | if (!sym) { |
1727 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1728 | tev->point.symbol); | |
02b95dad MH |
1729 | ret = -ENOENT; |
1730 | goto error; | |
1731 | } | |
e334016f | 1732 | |
02b95dad MH |
1733 | return 1; |
1734 | error: | |
0e60836b | 1735 | clear_probe_trace_event(tev); |
02b95dad MH |
1736 | free(tev); |
1737 | *tevs = NULL; | |
e334016f | 1738 | return ret; |
4235b045 MH |
1739 | } |
1740 | ||
1741 | struct __event_package { | |
1742 | struct perf_probe_event *pev; | |
0e60836b | 1743 | struct probe_trace_event *tevs; |
4235b045 MH |
1744 | int ntevs; |
1745 | }; | |
1746 | ||
146a1439 | 1747 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
469b9b88 | 1748 | int max_tevs, const char *module, bool force_add) |
4235b045 | 1749 | { |
146a1439 | 1750 | int i, j, ret; |
4235b045 MH |
1751 | struct __event_package *pkgs; |
1752 | ||
e334016f MH |
1753 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
1754 | if (pkgs == NULL) | |
1755 | return -ENOMEM; | |
4235b045 MH |
1756 | |
1757 | /* Init vmlinux path */ | |
146a1439 | 1758 | ret = init_vmlinux(); |
449e5b24 MH |
1759 | if (ret < 0) { |
1760 | free(pkgs); | |
146a1439 | 1761 | return ret; |
449e5b24 | 1762 | } |
4235b045 MH |
1763 | |
1764 | /* Loop 1: convert all events */ | |
1765 | for (i = 0; i < npevs; i++) { | |
1766 | pkgs[i].pev = &pevs[i]; | |
1767 | /* Convert with or without debuginfo */ | |
0e60836b | 1768 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
1769 | &pkgs[i].tevs, |
1770 | max_tevs, | |
1771 | module); | |
146a1439 MH |
1772 | if (ret < 0) |
1773 | goto end; | |
1774 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
1775 | } |
1776 | ||
4235b045 | 1777 | /* Loop 2: add all events */ |
146a1439 | 1778 | for (i = 0; i < npevs && ret >= 0; i++) |
0e60836b | 1779 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 MH |
1780 | pkgs[i].ntevs, force_add); |
1781 | end: | |
449e5b24 MH |
1782 | /* Loop 3: cleanup and free trace events */ |
1783 | for (i = 0; i < npevs; i++) { | |
146a1439 | 1784 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 1785 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
449e5b24 MH |
1786 | free(pkgs[i].tevs); |
1787 | } | |
1788 | free(pkgs); | |
146a1439 MH |
1789 | |
1790 | return ret; | |
e0faa8d3 MH |
1791 | } |
1792 | ||
0e60836b | 1793 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
1794 | { |
1795 | char *p; | |
1796 | char buf[128]; | |
4235b045 | 1797 | int ret; |
bbbb521b | 1798 | |
0e60836b | 1799 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
1800 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
1801 | if (ret < 0) | |
1802 | goto error; | |
1803 | ||
bbbb521b | 1804 | p = strchr(buf + 2, ':'); |
146a1439 MH |
1805 | if (!p) { |
1806 | pr_debug("Internal error: %s should have ':' but not.\n", | |
1807 | ent->s); | |
1808 | ret = -ENOTSUP; | |
1809 | goto error; | |
1810 | } | |
bbbb521b MH |
1811 | *p = '/'; |
1812 | ||
4235b045 MH |
1813 | pr_debug("Writing event: %s\n", buf); |
1814 | ret = write(fd, buf, strlen(buf)); | |
146a1439 MH |
1815 | if (ret < 0) |
1816 | goto error; | |
1817 | ||
bbbb521b | 1818 | printf("Remove event: %s\n", ent->s); |
146a1439 MH |
1819 | return 0; |
1820 | error: | |
1821 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
1822 | return ret; | |
bbbb521b MH |
1823 | } |
1824 | ||
0e60836b | 1825 | static int del_trace_probe_event(int fd, const char *group, |
146a1439 | 1826 | const char *event, struct strlist *namelist) |
fa28244d MH |
1827 | { |
1828 | char buf[128]; | |
bbbb521b | 1829 | struct str_node *ent, *n; |
146a1439 | 1830 | int found = 0, ret = 0; |
fa28244d | 1831 | |
146a1439 MH |
1832 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
1833 | if (ret < 0) { | |
0e43e5d2 | 1834 | pr_err("Failed to copy event.\n"); |
146a1439 MH |
1835 | return ret; |
1836 | } | |
fa28244d | 1837 | |
bbbb521b MH |
1838 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
1839 | strlist__for_each_safe(ent, n, namelist) | |
1840 | if (strglobmatch(ent->s, buf)) { | |
1841 | found++; | |
0e60836b | 1842 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
1843 | if (ret < 0) |
1844 | break; | |
bbbb521b MH |
1845 | strlist__remove(namelist, ent); |
1846 | } | |
1847 | } else { | |
1848 | ent = strlist__find(namelist, buf); | |
1849 | if (ent) { | |
1850 | found++; | |
0e60836b | 1851 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
1852 | if (ret >= 0) |
1853 | strlist__remove(namelist, ent); | |
bbbb521b MH |
1854 | } |
1855 | } | |
146a1439 MH |
1856 | if (found == 0 && ret >= 0) |
1857 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
1858 | ||
1859 | return ret; | |
fa28244d MH |
1860 | } |
1861 | ||
146a1439 | 1862 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 1863 | { |
146a1439 | 1864 | int fd, ret = 0; |
fa28244d MH |
1865 | const char *group, *event; |
1866 | char *p, *str; | |
1867 | struct str_node *ent; | |
1868 | struct strlist *namelist; | |
1869 | ||
f4d7da49 | 1870 | fd = open_kprobe_events(true); |
146a1439 MH |
1871 | if (fd < 0) |
1872 | return fd; | |
1873 | ||
fa28244d | 1874 | /* Get current event names */ |
0e60836b | 1875 | namelist = get_probe_trace_event_names(fd, true); |
146a1439 MH |
1876 | if (namelist == NULL) |
1877 | return -EINVAL; | |
fa28244d | 1878 | |
adf365f4 | 1879 | strlist__for_each(ent, dellist) { |
02b95dad MH |
1880 | str = strdup(ent->s); |
1881 | if (str == NULL) { | |
1882 | ret = -ENOMEM; | |
1883 | break; | |
1884 | } | |
bbbb521b | 1885 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
1886 | p = strchr(str, ':'); |
1887 | if (p) { | |
1888 | group = str; | |
1889 | *p = '\0'; | |
1890 | event = p + 1; | |
1891 | } else { | |
bbbb521b | 1892 | group = "*"; |
fa28244d MH |
1893 | event = str; |
1894 | } | |
bbbb521b | 1895 | pr_debug("Group: %s, Event: %s\n", group, event); |
0e60836b | 1896 | ret = del_trace_probe_event(fd, group, event, namelist); |
fa28244d | 1897 | free(str); |
146a1439 MH |
1898 | if (ret < 0) |
1899 | break; | |
fa28244d MH |
1900 | } |
1901 | strlist__delete(namelist); | |
1902 | close(fd); | |
146a1439 MH |
1903 | |
1904 | return ret; | |
fa28244d MH |
1905 | } |
1906 |