Commit | Line | Data |
---|---|---|
50656eec | 1 | /* |
0e60836b | 2 | * probe-event.c : perf-probe definition to probe_events format converter |
50656eec MH |
3 | * |
4 | * Written by Masami Hiramatsu <mhiramat@redhat.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | * | |
20 | */ | |
21 | ||
22 | #define _GNU_SOURCE | |
23 | #include <sys/utsname.h> | |
24 | #include <sys/types.h> | |
25 | #include <sys/stat.h> | |
26 | #include <fcntl.h> | |
27 | #include <errno.h> | |
28 | #include <stdio.h> | |
29 | #include <unistd.h> | |
30 | #include <stdlib.h> | |
31 | #include <string.h> | |
4de189fe MH |
32 | #include <stdarg.h> |
33 | #include <limits.h> | |
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 MH |
97 | if (machine__create_kernel_maps(&machine) < 0) { |
98 | pr_debug("machine__create_kernel_maps "); | |
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; | |
fd930ff9 FBH |
117 | struct map *map; |
118 | const char *vmlinux_name; | |
469b9b88 MH |
119 | |
120 | if (module) { | |
121 | list_for_each_entry(dso, &machine.kernel_dsos, node) { | |
122 | if (strncmp(dso->short_name + 1, module, | |
123 | dso->short_name_len - 2) == 0) | |
124 | goto found; | |
125 | } | |
126 | pr_debug("Failed to find module %s.\n", module); | |
127 | return NULL; | |
fd930ff9 FBH |
128 | } |
129 | ||
130 | map = machine.vmlinux_maps[MAP__FUNCTION]; | |
131 | dso = map->dso; | |
132 | ||
133 | vmlinux_name = symbol_conf.vmlinux_name; | |
134 | if (vmlinux_name) { | |
135 | if (dso__load_vmlinux(dso, map, vmlinux_name, NULL) <= 0) | |
136 | return NULL; | |
469b9b88 | 137 | } else { |
fd930ff9 | 138 | if (dso__load_vmlinux_path(dso, map, NULL) < 0) { |
469b9b88 MH |
139 | pr_debug("Failed to load kernel map.\n"); |
140 | return NULL; | |
141 | } | |
142 | } | |
143 | found: | |
144 | return dso->long_name; | |
145 | } | |
146 | ||
4b4da7f7 | 147 | #ifdef DWARF_SUPPORT |
469b9b88 | 148 | static int open_vmlinux(const char *module) |
e0faa8d3 | 149 | { |
469b9b88 MH |
150 | const char *path = kernel_get_module_path(module); |
151 | if (!path) { | |
152 | pr_err("Failed to find path of %s module", module ?: "kernel"); | |
153 | return -ENOENT; | |
e0faa8d3 | 154 | } |
469b9b88 MH |
155 | pr_debug("Try to open %s\n", path); |
156 | return open(path, O_RDONLY); | |
e0faa8d3 | 157 | } |
4b4da7f7 | 158 | |
0e60836b SD |
159 | /* |
160 | * Convert trace point to probe point with debuginfo | |
161 | * Currently only handles kprobes. | |
162 | */ | |
163 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, | |
469b9b88 | 164 | struct perf_probe_point *pp) |
4b4da7f7 MH |
165 | { |
166 | struct symbol *sym; | |
469b9b88 MH |
167 | struct map *map; |
168 | u64 addr; | |
169 | int ret = -ENOENT; | |
4b4da7f7 | 170 | |
469b9b88 | 171 | sym = __find_kernel_function_by_name(tp->symbol, &map); |
4b4da7f7 | 172 | if (sym) { |
469b9b88 MH |
173 | addr = map->unmap_ip(map, sym->start + tp->offset); |
174 | pr_debug("try to find %s+%ld@%llx\n", tp->symbol, | |
175 | tp->offset, addr); | |
176 | ret = find_perf_probe_point((unsigned long)addr, pp); | |
4b4da7f7 MH |
177 | } |
178 | if (ret <= 0) { | |
146a1439 MH |
179 | pr_debug("Failed to find corresponding probes from " |
180 | "debuginfo. Use kprobe event information.\n"); | |
02b95dad MH |
181 | pp->function = strdup(tp->symbol); |
182 | if (pp->function == NULL) | |
183 | return -ENOMEM; | |
4b4da7f7 MH |
184 | pp->offset = tp->offset; |
185 | } | |
186 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
187 | |
188 | return 0; | |
4b4da7f7 MH |
189 | } |
190 | ||
191 | /* Try to find perf_probe_event with debuginfo */ | |
0e60836b SD |
192 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
193 | struct probe_trace_event **tevs, | |
469b9b88 | 194 | int max_tevs, const char *module) |
4b4da7f7 MH |
195 | { |
196 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
197 | int fd, ntevs; | |
198 | ||
469b9b88 | 199 | fd = open_vmlinux(module); |
4b4da7f7 | 200 | if (fd < 0) { |
146a1439 MH |
201 | if (need_dwarf) { |
202 | pr_warning("Failed to open debuginfo file.\n"); | |
203 | return fd; | |
204 | } | |
4b4da7f7 MH |
205 | pr_debug("Could not open vmlinux. Try to use symbols.\n"); |
206 | return 0; | |
207 | } | |
208 | ||
209 | /* Searching trace events corresponding to probe event */ | |
0e60836b | 210 | ntevs = find_probe_trace_events(fd, pev, tevs, max_tevs); |
4b4da7f7 MH |
211 | close(fd); |
212 | ||
146a1439 | 213 | if (ntevs > 0) { /* Succeeded to find trace events */ |
0e60836b | 214 | pr_debug("find %d probe_trace_events.\n", ntevs); |
4b4da7f7 | 215 | return ntevs; |
146a1439 | 216 | } |
4b4da7f7 | 217 | |
146a1439 MH |
218 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
219 | pr_warning("Probe point '%s' not found.\n", | |
220 | synthesize_perf_probe_point(&pev->point)); | |
221 | return -ENOENT; | |
222 | } | |
223 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
224 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
225 | if (ntevs == -EBADF) { | |
226 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
227 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
228 | if (!need_dwarf) { | |
229 | pr_debug("Trying to use symbols.\nn"); | |
230 | return 0; | |
231 | } | |
4b4da7f7 | 232 | } |
15eca306 | 233 | return ntevs; |
4b4da7f7 MH |
234 | } |
235 | ||
7cf0b79e MH |
236 | /* |
237 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
238 | * and chop off leading directories that do not exist. Result is passed back as | |
239 | * a newly allocated path on success. | |
240 | * Return 0 if file was found and readable, -errno otherwise. | |
241 | */ | |
6a330a3c MH |
242 | static int get_real_path(const char *raw_path, const char *comp_dir, |
243 | char **new_path) | |
7cf0b79e | 244 | { |
6a330a3c MH |
245 | const char *prefix = symbol_conf.source_prefix; |
246 | ||
247 | if (!prefix) { | |
248 | if (raw_path[0] != '/' && comp_dir) | |
249 | /* If not an absolute path, try to use comp_dir */ | |
250 | prefix = comp_dir; | |
251 | else { | |
252 | if (access(raw_path, R_OK) == 0) { | |
253 | *new_path = strdup(raw_path); | |
254 | return 0; | |
255 | } else | |
256 | return -errno; | |
257 | } | |
7cf0b79e MH |
258 | } |
259 | ||
6a330a3c | 260 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
7cf0b79e MH |
261 | if (!*new_path) |
262 | return -ENOMEM; | |
263 | ||
264 | for (;;) { | |
6a330a3c | 265 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
7cf0b79e MH |
266 | |
267 | if (access(*new_path, R_OK) == 0) | |
268 | return 0; | |
269 | ||
6a330a3c MH |
270 | if (!symbol_conf.source_prefix) |
271 | /* In case of searching comp_dir, don't retry */ | |
272 | return -errno; | |
273 | ||
7cf0b79e MH |
274 | switch (errno) { |
275 | case ENAMETOOLONG: | |
276 | case ENOENT: | |
277 | case EROFS: | |
278 | case EFAULT: | |
279 | raw_path = strchr(++raw_path, '/'); | |
280 | if (!raw_path) { | |
281 | free(*new_path); | |
282 | *new_path = NULL; | |
283 | return -ENOENT; | |
284 | } | |
285 | continue; | |
286 | ||
287 | default: | |
288 | free(*new_path); | |
289 | *new_path = NULL; | |
290 | return -errno; | |
291 | } | |
292 | } | |
293 | } | |
294 | ||
4b4da7f7 MH |
295 | #define LINEBUF_SIZE 256 |
296 | #define NR_ADDITIONAL_LINES 2 | |
297 | ||
d3b63d7a | 298 | static int show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
299 | { |
300 | char buf[LINEBUF_SIZE]; | |
301 | const char *color = PERF_COLOR_BLUE; | |
302 | ||
303 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
304 | goto error; | |
305 | if (!skip) { | |
306 | if (show_num) | |
d3b63d7a | 307 | fprintf(stdout, "%7d %s", l, buf); |
4b4da7f7 MH |
308 | else |
309 | color_fprintf(stdout, color, " %s", buf); | |
310 | } | |
311 | ||
312 | while (strlen(buf) == LINEBUF_SIZE - 1 && | |
313 | buf[LINEBUF_SIZE - 2] != '\n') { | |
314 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
315 | goto error; | |
316 | if (!skip) { | |
317 | if (show_num) | |
318 | fprintf(stdout, "%s", buf); | |
319 | else | |
320 | color_fprintf(stdout, color, "%s", buf); | |
321 | } | |
322 | } | |
146a1439 MH |
323 | |
324 | return 0; | |
4b4da7f7 MH |
325 | error: |
326 | if (feof(fp)) | |
146a1439 | 327 | pr_warning("Source file is shorter than expected.\n"); |
4b4da7f7 | 328 | else |
146a1439 MH |
329 | pr_warning("File read error: %s\n", strerror(errno)); |
330 | ||
331 | return -1; | |
4b4da7f7 MH |
332 | } |
333 | ||
334 | /* | |
335 | * Show line-range always requires debuginfo to find source file and | |
336 | * line number. | |
337 | */ | |
469b9b88 | 338 | int show_line_range(struct line_range *lr, const char *module) |
4b4da7f7 | 339 | { |
d3b63d7a | 340 | int l = 1; |
4b4da7f7 MH |
341 | struct line_node *ln; |
342 | FILE *fp; | |
343 | int fd, ret; | |
7cf0b79e | 344 | char *tmp; |
4b4da7f7 MH |
345 | |
346 | /* Search a line range */ | |
146a1439 MH |
347 | ret = init_vmlinux(); |
348 | if (ret < 0) | |
349 | return ret; | |
350 | ||
469b9b88 | 351 | fd = open_vmlinux(module); |
146a1439 MH |
352 | if (fd < 0) { |
353 | pr_warning("Failed to open debuginfo file.\n"); | |
354 | return fd; | |
355 | } | |
356 | ||
4b4da7f7 | 357 | ret = find_line_range(fd, lr); |
4b4da7f7 | 358 | close(fd); |
146a1439 MH |
359 | if (ret == 0) { |
360 | pr_warning("Specified source line is not found.\n"); | |
361 | return -ENOENT; | |
362 | } else if (ret < 0) { | |
363 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
364 | return ret; | |
365 | } | |
4b4da7f7 | 366 | |
7cf0b79e MH |
367 | /* Convert source file path */ |
368 | tmp = lr->path; | |
6a330a3c | 369 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
7cf0b79e MH |
370 | free(tmp); /* Free old path */ |
371 | if (ret < 0) { | |
372 | pr_warning("Failed to find source file. (%d)\n", ret); | |
373 | return ret; | |
374 | } | |
375 | ||
4b4da7f7 MH |
376 | setup_pager(); |
377 | ||
378 | if (lr->function) | |
379 | fprintf(stdout, "<%s:%d>\n", lr->function, | |
380 | lr->start - lr->offset); | |
381 | else | |
382 | fprintf(stdout, "<%s:%d>\n", lr->file, lr->start); | |
383 | ||
384 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
385 | if (fp == NULL) { |
386 | pr_warning("Failed to open %s: %s\n", lr->path, | |
387 | strerror(errno)); | |
388 | return -errno; | |
389 | } | |
4b4da7f7 | 390 | /* Skip to starting line number */ |
146a1439 MH |
391 | while (l < lr->start && ret >= 0) |
392 | ret = show_one_line(fp, l++, true, false); | |
393 | if (ret < 0) | |
394 | goto end; | |
4b4da7f7 MH |
395 | |
396 | list_for_each_entry(ln, &lr->line_list, list) { | |
146a1439 MH |
397 | while (ln->line > l && ret >= 0) |
398 | ret = show_one_line(fp, (l++) - lr->offset, | |
399 | false, false); | |
400 | if (ret >= 0) | |
401 | ret = show_one_line(fp, (l++) - lr->offset, | |
402 | false, true); | |
403 | if (ret < 0) | |
404 | goto end; | |
4b4da7f7 MH |
405 | } |
406 | ||
407 | if (lr->end == INT_MAX) | |
408 | lr->end = l + NR_ADDITIONAL_LINES; | |
dda4ab34 | 409 | while (l <= lr->end && !feof(fp) && ret >= 0) |
146a1439 MH |
410 | ret = show_one_line(fp, (l++) - lr->offset, false, false); |
411 | end: | |
4b4da7f7 | 412 | fclose(fp); |
146a1439 | 413 | return ret; |
4b4da7f7 MH |
414 | } |
415 | ||
cf6eb489 | 416 | static int show_available_vars_at(int fd, struct perf_probe_event *pev, |
fb8c5a56 | 417 | int max_vls, bool externs) |
cf6eb489 MH |
418 | { |
419 | char *buf; | |
420 | int ret, i; | |
421 | struct str_node *node; | |
422 | struct variable_list *vls = NULL, *vl; | |
423 | ||
424 | buf = synthesize_perf_probe_point(&pev->point); | |
425 | if (!buf) | |
426 | return -EINVAL; | |
427 | pr_debug("Searching variables at %s\n", buf); | |
428 | ||
fb8c5a56 | 429 | ret = find_available_vars_at(fd, pev, &vls, max_vls, externs); |
cf6eb489 MH |
430 | if (ret > 0) { |
431 | /* Some variables were found */ | |
432 | fprintf(stdout, "Available variables at %s\n", buf); | |
433 | for (i = 0; i < ret; i++) { | |
434 | vl = &vls[i]; | |
435 | /* | |
436 | * A probe point might be converted to | |
437 | * several trace points. | |
438 | */ | |
439 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
440 | vl->point.offset); | |
441 | free(vl->point.symbol); | |
442 | if (vl->vars) { | |
443 | strlist__for_each(node, vl->vars) | |
444 | fprintf(stdout, "\t\t%s\n", node->s); | |
445 | strlist__delete(vl->vars); | |
446 | } else | |
447 | fprintf(stdout, "(No variables)\n"); | |
448 | } | |
449 | free(vls); | |
450 | } else | |
451 | pr_err("Failed to find variables at %s (%d)\n", buf, ret); | |
452 | ||
453 | free(buf); | |
454 | return ret; | |
455 | } | |
456 | ||
457 | /* Show available variables on given probe point */ | |
458 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
469b9b88 | 459 | int max_vls, const char *module, bool externs) |
cf6eb489 MH |
460 | { |
461 | int i, fd, ret = 0; | |
462 | ||
463 | ret = init_vmlinux(); | |
464 | if (ret < 0) | |
465 | return ret; | |
466 | ||
469b9b88 | 467 | fd = open_vmlinux(module); |
cf6eb489 MH |
468 | if (fd < 0) { |
469 | pr_warning("Failed to open debuginfo file.\n"); | |
470 | return fd; | |
471 | } | |
472 | ||
473 | setup_pager(); | |
474 | ||
475 | for (i = 0; i < npevs && ret >= 0; i++) | |
fb8c5a56 | 476 | ret = show_available_vars_at(fd, &pevs[i], max_vls, externs); |
cf6eb489 MH |
477 | |
478 | close(fd); | |
479 | return ret; | |
480 | } | |
481 | ||
4b4da7f7 MH |
482 | #else /* !DWARF_SUPPORT */ |
483 | ||
0e60836b | 484 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, |
469b9b88 | 485 | struct perf_probe_point *pp) |
4b4da7f7 | 486 | { |
469b9b88 MH |
487 | struct symbol *sym; |
488 | ||
489 | sym = __find_kernel_function_by_name(tp->symbol, NULL); | |
490 | if (!sym) { | |
491 | pr_err("Failed to find symbol %s in kernel.\n", tp->symbol); | |
492 | return -ENOENT; | |
493 | } | |
02b95dad MH |
494 | pp->function = strdup(tp->symbol); |
495 | if (pp->function == NULL) | |
496 | return -ENOMEM; | |
4b4da7f7 MH |
497 | pp->offset = tp->offset; |
498 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
499 | |
500 | return 0; | |
4b4da7f7 MH |
501 | } |
502 | ||
0e60836b SD |
503 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
504 | struct probe_trace_event **tevs __unused, | |
469b9b88 | 505 | int max_tevs __unused, const char *mod __unused) |
4b4da7f7 | 506 | { |
146a1439 MH |
507 | if (perf_probe_event_need_dwarf(pev)) { |
508 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
509 | return -ENOSYS; | |
510 | } | |
4b4da7f7 MH |
511 | return 0; |
512 | } | |
513 | ||
469b9b88 | 514 | int show_line_range(struct line_range *lr __unused, const char *module __unused) |
4b4da7f7 | 515 | { |
146a1439 MH |
516 | pr_warning("Debuginfo-analysis is not supported.\n"); |
517 | return -ENOSYS; | |
4b4da7f7 MH |
518 | } |
519 | ||
cf6eb489 | 520 | int show_available_vars(struct perf_probe_event *pevs __unused, |
469b9b88 MH |
521 | int npevs __unused, int max_vls __unused, |
522 | const char *module __unused, bool externs __unused) | |
cf6eb489 MH |
523 | { |
524 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
525 | return -ENOSYS; | |
526 | } | |
e0faa8d3 MH |
527 | #endif |
528 | ||
146a1439 | 529 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def MH |
530 | { |
531 | const char *ptr; | |
532 | char *tmp; | |
533 | /* | |
534 | * <Syntax> | |
535 | * SRC:SLN[+NUM|-ELN] | |
536 | * FUNC[:SLN[+NUM|-ELN]] | |
537 | */ | |
538 | ptr = strchr(arg, ':'); | |
539 | if (ptr) { | |
d3b63d7a | 540 | lr->start = (int)strtoul(ptr + 1, &tmp, 0); |
dda4ab34 | 541 | if (*tmp == '+') { |
d3b63d7a | 542 | lr->end = lr->start + (int)strtoul(tmp + 1, &tmp, 0); |
dda4ab34 MH |
543 | lr->end--; /* |
544 | * Adjust the number of lines here. | |
545 | * If the number of lines == 1, the | |
546 | * the end of line should be equal to | |
547 | * the start of line. | |
548 | */ | |
549 | } else if (*tmp == '-') | |
d3b63d7a | 550 | lr->end = (int)strtoul(tmp + 1, &tmp, 0); |
631c9def | 551 | else |
d3b63d7a MH |
552 | lr->end = INT_MAX; |
553 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); | |
554 | if (lr->start > lr->end) { | |
631c9def | 555 | semantic_error("Start line must be smaller" |
146a1439 MH |
556 | " than end line.\n"); |
557 | return -EINVAL; | |
558 | } | |
559 | if (*tmp != '\0') { | |
560 | semantic_error("Tailing with invalid character '%d'.\n", | |
631c9def | 561 | *tmp); |
146a1439 MH |
562 | return -EINVAL; |
563 | } | |
02b95dad | 564 | tmp = strndup(arg, (ptr - arg)); |
d3b63d7a | 565 | } else { |
02b95dad | 566 | tmp = strdup(arg); |
d3b63d7a MH |
567 | lr->end = INT_MAX; |
568 | } | |
02b95dad MH |
569 | |
570 | if (tmp == NULL) | |
571 | return -ENOMEM; | |
631c9def MH |
572 | |
573 | if (strchr(tmp, '.')) | |
574 | lr->file = tmp; | |
575 | else | |
576 | lr->function = tmp; | |
146a1439 MH |
577 | |
578 | return 0; | |
631c9def MH |
579 | } |
580 | ||
b7702a21 MH |
581 | /* Check the name is good for event/group */ |
582 | static bool check_event_name(const char *name) | |
583 | { | |
584 | if (!isalpha(*name) && *name != '_') | |
585 | return false; | |
586 | while (*++name != '\0') { | |
587 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
588 | return false; | |
589 | } | |
590 | return true; | |
591 | } | |
592 | ||
50656eec | 593 | /* Parse probepoint definition. */ |
146a1439 | 594 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 595 | { |
4235b045 | 596 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
597 | char *ptr, *tmp; |
598 | char c, nc = 0; | |
599 | /* | |
600 | * <Syntax> | |
2a9c8c36 MH |
601 | * perf probe [EVENT=]SRC[:LN|;PTN] |
602 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
603 | * |
604 | * TODO:Group name support | |
50656eec MH |
605 | */ |
606 | ||
2a9c8c36 MH |
607 | ptr = strpbrk(arg, ";=@+%"); |
608 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
609 | *ptr = '\0'; |
610 | tmp = ptr + 1; | |
146a1439 MH |
611 | if (strchr(arg, ':')) { |
612 | semantic_error("Group name is not supported yet.\n"); | |
613 | return -ENOTSUP; | |
614 | } | |
615 | if (!check_event_name(arg)) { | |
b7702a21 | 616 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
617 | "follow C symbol-naming rule.\n", arg); |
618 | return -EINVAL; | |
619 | } | |
02b95dad MH |
620 | pev->event = strdup(arg); |
621 | if (pev->event == NULL) | |
622 | return -ENOMEM; | |
4235b045 | 623 | pev->group = NULL; |
af663d75 MH |
624 | arg = tmp; |
625 | } | |
626 | ||
2a9c8c36 | 627 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
628 | if (ptr) { |
629 | nc = *ptr; | |
630 | *ptr++ = '\0'; | |
631 | } | |
632 | ||
02b95dad MH |
633 | tmp = strdup(arg); |
634 | if (tmp == NULL) | |
635 | return -ENOMEM; | |
636 | ||
50656eec | 637 | /* Check arg is function or file and copy it */ |
02b95dad MH |
638 | if (strchr(tmp, '.')) /* File */ |
639 | pp->file = tmp; | |
50656eec | 640 | else /* Function */ |
02b95dad | 641 | pp->function = tmp; |
50656eec MH |
642 | |
643 | /* Parse other options */ | |
644 | while (ptr) { | |
645 | arg = ptr; | |
646 | c = nc; | |
2a9c8c36 | 647 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
648 | pp->lazy_line = strdup(arg); |
649 | if (pp->lazy_line == NULL) | |
650 | return -ENOMEM; | |
2a9c8c36 MH |
651 | break; |
652 | } | |
653 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
654 | if (ptr) { |
655 | nc = *ptr; | |
656 | *ptr++ = '\0'; | |
657 | } | |
658 | switch (c) { | |
659 | case ':': /* Line number */ | |
660 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 661 | if (*tmp != '\0') { |
2a9c8c36 | 662 | semantic_error("There is non-digit char" |
146a1439 MH |
663 | " in line number.\n"); |
664 | return -EINVAL; | |
665 | } | |
50656eec MH |
666 | break; |
667 | case '+': /* Byte offset from a symbol */ | |
668 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 669 | if (*tmp != '\0') { |
2a9c8c36 | 670 | semantic_error("There is non-digit character" |
146a1439 MH |
671 | " in offset.\n"); |
672 | return -EINVAL; | |
673 | } | |
50656eec MH |
674 | break; |
675 | case '@': /* File name */ | |
146a1439 MH |
676 | if (pp->file) { |
677 | semantic_error("SRC@SRC is not allowed.\n"); | |
678 | return -EINVAL; | |
679 | } | |
02b95dad MH |
680 | pp->file = strdup(arg); |
681 | if (pp->file == NULL) | |
682 | return -ENOMEM; | |
50656eec MH |
683 | break; |
684 | case '%': /* Probe places */ | |
685 | if (strcmp(arg, "return") == 0) { | |
686 | pp->retprobe = 1; | |
146a1439 MH |
687 | } else { /* Others not supported yet */ |
688 | semantic_error("%%%s is not supported.\n", arg); | |
689 | return -ENOTSUP; | |
690 | } | |
50656eec | 691 | break; |
146a1439 MH |
692 | default: /* Buggy case */ |
693 | pr_err("This program has a bug at %s:%d.\n", | |
694 | __FILE__, __LINE__); | |
695 | return -ENOTSUP; | |
50656eec MH |
696 | break; |
697 | } | |
698 | } | |
699 | ||
700 | /* Exclusion check */ | |
146a1439 | 701 | if (pp->lazy_line && pp->line) { |
2a9c8c36 | 702 | semantic_error("Lazy pattern can't be used with line number."); |
146a1439 MH |
703 | return -EINVAL; |
704 | } | |
2a9c8c36 | 705 | |
146a1439 | 706 | if (pp->lazy_line && pp->offset) { |
2a9c8c36 | 707 | semantic_error("Lazy pattern can't be used with offset."); |
146a1439 MH |
708 | return -EINVAL; |
709 | } | |
2a9c8c36 | 710 | |
146a1439 | 711 | if (pp->line && pp->offset) { |
50656eec | 712 | semantic_error("Offset can't be used with line number."); |
146a1439 MH |
713 | return -EINVAL; |
714 | } | |
50656eec | 715 | |
146a1439 | 716 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 MH |
717 | semantic_error("File always requires line number or " |
718 | "lazy pattern."); | |
146a1439 MH |
719 | return -EINVAL; |
720 | } | |
50656eec | 721 | |
146a1439 | 722 | if (pp->offset && !pp->function) { |
50656eec | 723 | semantic_error("Offset requires an entry function."); |
146a1439 MH |
724 | return -EINVAL; |
725 | } | |
50656eec | 726 | |
146a1439 | 727 | if (pp->retprobe && !pp->function) { |
50656eec | 728 | semantic_error("Return probe requires an entry function."); |
146a1439 MH |
729 | return -EINVAL; |
730 | } | |
50656eec | 731 | |
146a1439 | 732 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 MH |
733 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
734 | "return probe."); | |
146a1439 MH |
735 | return -EINVAL; |
736 | } | |
50656eec | 737 | |
4235b045 | 738 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
739 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
740 | pp->lazy_line); | |
146a1439 | 741 | return 0; |
50656eec MH |
742 | } |
743 | ||
7df2f329 | 744 | /* Parse perf-probe event argument */ |
146a1439 | 745 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 746 | { |
b2a3c12b | 747 | char *tmp, *goodname; |
7df2f329 MH |
748 | struct perf_probe_arg_field **fieldp; |
749 | ||
750 | pr_debug("parsing arg: %s into ", str); | |
751 | ||
48481938 MH |
752 | tmp = strchr(str, '='); |
753 | if (tmp) { | |
02b95dad MH |
754 | arg->name = strndup(str, tmp - str); |
755 | if (arg->name == NULL) | |
756 | return -ENOMEM; | |
11a1ca35 | 757 | pr_debug("name:%s ", arg->name); |
48481938 MH |
758 | str = tmp + 1; |
759 | } | |
760 | ||
11a1ca35 MH |
761 | tmp = strchr(str, ':'); |
762 | if (tmp) { /* Type setting */ | |
763 | *tmp = '\0'; | |
02b95dad MH |
764 | arg->type = strdup(tmp + 1); |
765 | if (arg->type == NULL) | |
766 | return -ENOMEM; | |
11a1ca35 MH |
767 | pr_debug("type:%s ", arg->type); |
768 | } | |
769 | ||
b2a3c12b | 770 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
771 | if (!is_c_varname(str) || !tmp) { |
772 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
773 | arg->var = strdup(str); |
774 | if (arg->var == NULL) | |
775 | return -ENOMEM; | |
48481938 | 776 | pr_debug("%s\n", arg->var); |
146a1439 | 777 | return 0; |
7df2f329 MH |
778 | } |
779 | ||
b2a3c12b | 780 | /* Structure fields or array element */ |
02b95dad MH |
781 | arg->var = strndup(str, tmp - str); |
782 | if (arg->var == NULL) | |
783 | return -ENOMEM; | |
b2a3c12b | 784 | goodname = arg->var; |
48481938 | 785 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
786 | fieldp = &arg->field; |
787 | ||
788 | do { | |
e334016f MH |
789 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
790 | if (*fieldp == NULL) | |
791 | return -ENOMEM; | |
b2a3c12b MH |
792 | if (*tmp == '[') { /* Array */ |
793 | str = tmp; | |
794 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 795 | (*fieldp)->ref = true; |
b2a3c12b MH |
796 | if (*tmp != ']' || tmp == str + 1) { |
797 | semantic_error("Array index must be a" | |
798 | " number.\n"); | |
799 | return -EINVAL; | |
800 | } | |
801 | tmp++; | |
802 | if (*tmp == '\0') | |
803 | tmp = NULL; | |
804 | } else { /* Structure */ | |
805 | if (*tmp == '.') { | |
806 | str = tmp + 1; | |
807 | (*fieldp)->ref = false; | |
808 | } else if (tmp[1] == '>') { | |
809 | str = tmp + 2; | |
810 | (*fieldp)->ref = true; | |
811 | } else { | |
812 | semantic_error("Argument parse error: %s\n", | |
813 | str); | |
814 | return -EINVAL; | |
815 | } | |
816 | tmp = strpbrk(str, "-.["); | |
146a1439 | 817 | } |
7df2f329 | 818 | if (tmp) { |
02b95dad MH |
819 | (*fieldp)->name = strndup(str, tmp - str); |
820 | if ((*fieldp)->name == NULL) | |
821 | return -ENOMEM; | |
b2a3c12b MH |
822 | if (*str != '[') |
823 | goodname = (*fieldp)->name; | |
7df2f329 MH |
824 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
825 | fieldp = &(*fieldp)->next; | |
826 | } | |
827 | } while (tmp); | |
02b95dad MH |
828 | (*fieldp)->name = strdup(str); |
829 | if ((*fieldp)->name == NULL) | |
830 | return -ENOMEM; | |
b2a3c12b MH |
831 | if (*str != '[') |
832 | goodname = (*fieldp)->name; | |
7df2f329 | 833 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 834 | |
b2a3c12b | 835 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 836 | if (!arg->name) { |
b2a3c12b | 837 | arg->name = strdup(goodname); |
02b95dad MH |
838 | if (arg->name == NULL) |
839 | return -ENOMEM; | |
840 | } | |
146a1439 | 841 | return 0; |
7df2f329 MH |
842 | } |
843 | ||
4235b045 | 844 | /* Parse perf-probe event command */ |
146a1439 | 845 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 846 | { |
e1c01d61 | 847 | char **argv; |
146a1439 | 848 | int argc, i, ret = 0; |
fac13fd5 | 849 | |
4235b045 | 850 | argv = argv_split(cmd, &argc); |
146a1439 MH |
851 | if (!argv) { |
852 | pr_debug("Failed to split arguments.\n"); | |
853 | return -ENOMEM; | |
854 | } | |
855 | if (argc - 1 > MAX_PROBE_ARGS) { | |
856 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
857 | ret = -ERANGE; | |
858 | goto out; | |
859 | } | |
50656eec | 860 | /* Parse probe point */ |
146a1439 MH |
861 | ret = parse_perf_probe_point(argv[0], pev); |
862 | if (ret < 0) | |
863 | goto out; | |
50656eec | 864 | |
e1c01d61 | 865 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 866 | pev->nargs = argc - 1; |
e334016f MH |
867 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
868 | if (pev->args == NULL) { | |
869 | ret = -ENOMEM; | |
870 | goto out; | |
871 | } | |
146a1439 MH |
872 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
873 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
874 | if (ret >= 0 && | |
875 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 876 | semantic_error("You can't specify local variable for" |
146a1439 MH |
877 | " kretprobe.\n"); |
878 | ret = -EINVAL; | |
879 | } | |
e1c01d61 | 880 | } |
146a1439 | 881 | out: |
e1c01d61 | 882 | argv_free(argv); |
146a1439 MH |
883 | |
884 | return ret; | |
50656eec MH |
885 | } |
886 | ||
4235b045 MH |
887 | /* Return true if this perf_probe_event requires debuginfo */ |
888 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
889 | { | |
890 | int i; | |
891 | ||
892 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
893 | return true; | |
894 | ||
895 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 896 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
897 | return true; |
898 | ||
899 | return false; | |
900 | } | |
901 | ||
0e60836b SD |
902 | /* Parse probe_events event into struct probe_point */ |
903 | static int parse_probe_trace_command(const char *cmd, | |
904 | struct probe_trace_event *tev) | |
4de189fe | 905 | { |
0e60836b | 906 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
907 | char pr; |
908 | char *p; | |
909 | int ret, i, argc; | |
910 | char **argv; | |
911 | ||
0e60836b | 912 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 913 | argv = argv_split(cmd, &argc); |
146a1439 MH |
914 | if (!argv) { |
915 | pr_debug("Failed to split arguments.\n"); | |
916 | return -ENOMEM; | |
917 | } | |
918 | if (argc < 2) { | |
919 | semantic_error("Too few probe arguments.\n"); | |
920 | ret = -ERANGE; | |
921 | goto out; | |
922 | } | |
4de189fe MH |
923 | |
924 | /* Scan event and group name. */ | |
93aaa45a | 925 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
926 | &pr, (float *)(void *)&tev->group, |
927 | (float *)(void *)&tev->event); | |
146a1439 MH |
928 | if (ret != 3) { |
929 | semantic_error("Failed to parse event name: %s\n", argv[0]); | |
930 | ret = -EINVAL; | |
931 | goto out; | |
932 | } | |
4235b045 | 933 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 934 | |
4235b045 | 935 | tp->retprobe = (pr == 'r'); |
4de189fe MH |
936 | |
937 | /* Scan function name and offset */ | |
4235b045 MH |
938 | ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol, |
939 | &tp->offset); | |
4de189fe | 940 | if (ret == 1) |
4235b045 | 941 | tp->offset = 0; |
4de189fe | 942 | |
4235b045 | 943 | tev->nargs = argc - 2; |
0e60836b | 944 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
945 | if (tev->args == NULL) { |
946 | ret = -ENOMEM; | |
947 | goto out; | |
948 | } | |
4235b045 | 949 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
950 | p = strchr(argv[i + 2], '='); |
951 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
952 | *p++ = '\0'; |
953 | else | |
954 | p = argv[i + 2]; | |
02b95dad | 955 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 956 | /* TODO: parse regs and offset */ |
02b95dad MH |
957 | tev->args[i].value = strdup(p); |
958 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
959 | ret = -ENOMEM; | |
960 | goto out; | |
961 | } | |
4de189fe | 962 | } |
146a1439 MH |
963 | ret = 0; |
964 | out: | |
4de189fe | 965 | argv_free(argv); |
146a1439 | 966 | return ret; |
4de189fe MH |
967 | } |
968 | ||
7df2f329 MH |
969 | /* Compose only probe arg */ |
970 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
971 | { | |
972 | struct perf_probe_arg_field *field = pa->field; | |
973 | int ret; | |
974 | char *tmp = buf; | |
975 | ||
48481938 MH |
976 | if (pa->name && pa->var) |
977 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
978 | else | |
979 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
980 | if (ret <= 0) |
981 | goto error; | |
982 | tmp += ret; | |
983 | len -= ret; | |
984 | ||
985 | while (field) { | |
b2a3c12b MH |
986 | if (field->name[0] == '[') |
987 | ret = e_snprintf(tmp, len, "%s", field->name); | |
988 | else | |
989 | ret = e_snprintf(tmp, len, "%s%s", | |
990 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
991 | if (ret <= 0) |
992 | goto error; | |
993 | tmp += ret; | |
994 | len -= ret; | |
995 | field = field->next; | |
996 | } | |
11a1ca35 MH |
997 | |
998 | if (pa->type) { | |
999 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
1000 | if (ret <= 0) | |
1001 | goto error; | |
1002 | tmp += ret; | |
1003 | len -= ret; | |
1004 | } | |
1005 | ||
7df2f329 MH |
1006 | return tmp - buf; |
1007 | error: | |
146a1439 MH |
1008 | pr_debug("Failed to synthesize perf probe argument: %s", |
1009 | strerror(-ret)); | |
1010 | return ret; | |
7df2f329 MH |
1011 | } |
1012 | ||
4235b045 MH |
1013 | /* Compose only probe point (not argument) */ |
1014 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1015 | { |
fb1587d8 MH |
1016 | char *buf, *tmp; |
1017 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1018 | int ret, len; | |
4de189fe | 1019 | |
e334016f MH |
1020 | buf = zalloc(MAX_CMDLEN); |
1021 | if (buf == NULL) { | |
1022 | ret = -ENOMEM; | |
1023 | goto error; | |
1024 | } | |
4de189fe | 1025 | if (pp->offset) { |
fb1587d8 | 1026 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1027 | if (ret <= 0) |
1028 | goto error; | |
1029 | } | |
1030 | if (pp->line) { | |
fb1587d8 MH |
1031 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1032 | if (ret <= 0) | |
1033 | goto error; | |
1034 | } | |
1035 | if (pp->file) { | |
dd259c5d | 1036 | len = strlen(pp->file) - 31; |
fb1587d8 MH |
1037 | if (len < 0) |
1038 | len = 0; | |
1039 | tmp = strchr(pp->file + len, '/'); | |
1040 | if (!tmp) | |
dd259c5d | 1041 | tmp = pp->file + len; |
fb1587d8 | 1042 | ret = e_snprintf(file, 32, "@%s", tmp + 1); |
4de189fe MH |
1043 | if (ret <= 0) |
1044 | goto error; | |
1045 | } | |
1046 | ||
1047 | if (pp->function) | |
fb1587d8 MH |
1048 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1049 | offs, pp->retprobe ? "%return" : "", line, | |
1050 | file); | |
4de189fe | 1051 | else |
fb1587d8 | 1052 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1053 | if (ret <= 0) |
1054 | goto error; | |
1055 | ||
1056 | return buf; | |
7ef17aaf | 1057 | error: |
146a1439 MH |
1058 | pr_debug("Failed to synthesize perf probe point: %s", |
1059 | strerror(-ret)); | |
e334016f MH |
1060 | if (buf) |
1061 | free(buf); | |
146a1439 | 1062 | return NULL; |
7ef17aaf MH |
1063 | } |
1064 | ||
4235b045 MH |
1065 | #if 0 |
1066 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1067 | { |
1068 | char *buf; | |
1069 | int i, len, ret; | |
1070 | ||
4235b045 MH |
1071 | buf = synthesize_perf_probe_point(&pev->point); |
1072 | if (!buf) | |
1073 | return NULL; | |
4de189fe | 1074 | |
4235b045 MH |
1075 | len = strlen(buf); |
1076 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1077 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1078 | pev->args[i].name); |
1079 | if (ret <= 0) { | |
1080 | free(buf); | |
1081 | return NULL; | |
1082 | } | |
4de189fe MH |
1083 | len += ret; |
1084 | } | |
4de189fe | 1085 | |
4235b045 MH |
1086 | return buf; |
1087 | } | |
1088 | #endif | |
1089 | ||
0e60836b | 1090 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1091 | char **buf, size_t *buflen, |
1092 | int depth) | |
1093 | { | |
1094 | int ret; | |
1095 | if (ref->next) { | |
0e60836b | 1096 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1097 | buflen, depth + 1); |
1098 | if (depth < 0) | |
1099 | goto out; | |
1100 | } | |
1101 | ||
1102 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1103 | if (ret < 0) | |
1104 | depth = ret; | |
1105 | else { | |
1106 | *buf += ret; | |
1107 | *buflen -= ret; | |
1108 | } | |
1109 | out: | |
1110 | return depth; | |
4de189fe | 1111 | |
4de189fe MH |
1112 | } |
1113 | ||
0e60836b | 1114 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1115 | char *buf, size_t buflen) |
50656eec | 1116 | { |
0e60836b | 1117 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1118 | int ret, depth = 0; |
1119 | char *tmp = buf; | |
1120 | ||
1121 | /* Argument name or separator */ | |
1122 | if (arg->name) | |
1123 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1124 | else | |
1125 | ret = e_snprintf(buf, buflen, " "); | |
1126 | if (ret < 0) | |
1127 | return ret; | |
1128 | buf += ret; | |
1129 | buflen -= ret; | |
1130 | ||
b7dcb857 MH |
1131 | /* Special case: @XXX */ |
1132 | if (arg->value[0] == '@' && arg->ref) | |
1133 | ref = ref->next; | |
1134 | ||
4235b045 | 1135 | /* Dereferencing arguments */ |
b7dcb857 | 1136 | if (ref) { |
0e60836b | 1137 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1138 | &buflen, 1); |
1139 | if (depth < 0) | |
1140 | return depth; | |
1141 | } | |
1142 | ||
1143 | /* Print argument value */ | |
b7dcb857 MH |
1144 | if (arg->value[0] == '@' && arg->ref) |
1145 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1146 | arg->ref->offset); | |
1147 | else | |
1148 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1149 | if (ret < 0) |
1150 | return ret; | |
1151 | buf += ret; | |
1152 | buflen -= ret; | |
1153 | ||
1154 | /* Closing */ | |
1155 | while (depth--) { | |
1156 | ret = e_snprintf(buf, buflen, ")"); | |
1157 | if (ret < 0) | |
1158 | return ret; | |
1159 | buf += ret; | |
1160 | buflen -= ret; | |
1161 | } | |
4984912e MH |
1162 | /* Print argument type */ |
1163 | if (arg->type) { | |
1164 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1165 | if (ret <= 0) | |
1166 | return ret; | |
1167 | buf += ret; | |
1168 | } | |
4235b045 MH |
1169 | |
1170 | return buf - tmp; | |
1171 | } | |
1172 | ||
0e60836b | 1173 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1174 | { |
0e60836b | 1175 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1176 | char *buf; |
1177 | int i, len, ret; | |
1178 | ||
e334016f MH |
1179 | buf = zalloc(MAX_CMDLEN); |
1180 | if (buf == NULL) | |
1181 | return NULL; | |
1182 | ||
4235b045 MH |
1183 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu", |
1184 | tp->retprobe ? 'r' : 'p', | |
1185 | tev->group, tev->event, | |
1186 | tp->symbol, tp->offset); | |
1187 | if (len <= 0) | |
50656eec | 1188 | goto error; |
50656eec | 1189 | |
4235b045 | 1190 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1191 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1192 | MAX_CMDLEN - len); |
4de189fe | 1193 | if (ret <= 0) |
50656eec MH |
1194 | goto error; |
1195 | len += ret; | |
1196 | } | |
50656eec | 1197 | |
4235b045 | 1198 | return buf; |
50656eec | 1199 | error: |
4235b045 MH |
1200 | free(buf); |
1201 | return NULL; | |
1202 | } | |
50656eec | 1203 | |
0e60836b | 1204 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
469b9b88 | 1205 | struct perf_probe_event *pev) |
4235b045 | 1206 | { |
02b95dad | 1207 | char buf[64] = ""; |
146a1439 | 1208 | int i, ret; |
4235b045 | 1209 | |
4b4da7f7 | 1210 | /* Convert event/group name */ |
02b95dad MH |
1211 | pev->event = strdup(tev->event); |
1212 | pev->group = strdup(tev->group); | |
1213 | if (pev->event == NULL || pev->group == NULL) | |
1214 | return -ENOMEM; | |
fb1587d8 | 1215 | |
4b4da7f7 | 1216 | /* Convert trace_point to probe_point */ |
0e60836b | 1217 | ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); |
146a1439 MH |
1218 | if (ret < 0) |
1219 | return ret; | |
4b4da7f7 | 1220 | |
4235b045 MH |
1221 | /* Convert trace_arg to probe_arg */ |
1222 | pev->nargs = tev->nargs; | |
e334016f MH |
1223 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1224 | if (pev->args == NULL) | |
1225 | return -ENOMEM; | |
02b95dad | 1226 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1227 | if (tev->args[i].name) |
02b95dad | 1228 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1229 | else { |
0e60836b | 1230 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1231 | buf, 64); |
02b95dad | 1232 | pev->args[i].name = strdup(buf); |
4235b045 | 1233 | } |
02b95dad MH |
1234 | if (pev->args[i].name == NULL && ret >= 0) |
1235 | ret = -ENOMEM; | |
1236 | } | |
146a1439 MH |
1237 | |
1238 | if (ret < 0) | |
1239 | clear_perf_probe_event(pev); | |
1240 | ||
1241 | return ret; | |
4235b045 MH |
1242 | } |
1243 | ||
1244 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1245 | { | |
1246 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1247 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1248 | int i; |
1249 | ||
1250 | if (pev->event) | |
1251 | free(pev->event); | |
1252 | if (pev->group) | |
1253 | free(pev->group); | |
1254 | if (pp->file) | |
1255 | free(pp->file); | |
1256 | if (pp->function) | |
1257 | free(pp->function); | |
1258 | if (pp->lazy_line) | |
1259 | free(pp->lazy_line); | |
7df2f329 | 1260 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1261 | if (pev->args[i].name) |
1262 | free(pev->args[i].name); | |
48481938 MH |
1263 | if (pev->args[i].var) |
1264 | free(pev->args[i].var); | |
11a1ca35 MH |
1265 | if (pev->args[i].type) |
1266 | free(pev->args[i].type); | |
7df2f329 MH |
1267 | field = pev->args[i].field; |
1268 | while (field) { | |
1269 | next = field->next; | |
1270 | if (field->name) | |
1271 | free(field->name); | |
1272 | free(field); | |
1273 | field = next; | |
1274 | } | |
1275 | } | |
4235b045 MH |
1276 | if (pev->args) |
1277 | free(pev->args); | |
1278 | memset(pev, 0, sizeof(*pev)); | |
1279 | } | |
1280 | ||
0e60836b | 1281 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1282 | { |
0e60836b | 1283 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1284 | int i; |
1285 | ||
1286 | if (tev->event) | |
1287 | free(tev->event); | |
1288 | if (tev->group) | |
1289 | free(tev->group); | |
1290 | if (tev->point.symbol) | |
1291 | free(tev->point.symbol); | |
1292 | for (i = 0; i < tev->nargs; i++) { | |
1293 | if (tev->args[i].name) | |
1294 | free(tev->args[i].name); | |
1295 | if (tev->args[i].value) | |
1296 | free(tev->args[i].value); | |
4984912e MH |
1297 | if (tev->args[i].type) |
1298 | free(tev->args[i].type); | |
4235b045 MH |
1299 | ref = tev->args[i].ref; |
1300 | while (ref) { | |
1301 | next = ref->next; | |
1302 | free(ref); | |
1303 | ref = next; | |
1304 | } | |
1305 | } | |
1306 | if (tev->args) | |
1307 | free(tev->args); | |
1308 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1309 | } |
1310 | ||
f4d7da49 | 1311 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
1312 | { |
1313 | char buf[PATH_MAX]; | |
7ca5989d | 1314 | const char *__debugfs; |
4de189fe MH |
1315 | int ret; |
1316 | ||
7ca5989d MH |
1317 | __debugfs = debugfs_find_mountpoint(); |
1318 | if (__debugfs == NULL) { | |
1319 | pr_warning("Debugfs is not mounted.\n"); | |
1320 | return -ENOENT; | |
1321 | } | |
1322 | ||
1323 | ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); | |
146a1439 | 1324 | if (ret >= 0) { |
7ca5989d | 1325 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1326 | if (readwrite && !probe_event_dry_run) |
1327 | ret = open(buf, O_RDWR, O_APPEND); | |
1328 | else | |
1329 | ret = open(buf, O_RDONLY, 0); | |
1330 | } | |
f4d7da49 | 1331 | |
4de189fe MH |
1332 | if (ret < 0) { |
1333 | if (errno == ENOENT) | |
146a1439 MH |
1334 | pr_warning("kprobe_events file does not exist - please" |
1335 | " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); | |
4de189fe | 1336 | else |
146a1439 MH |
1337 | pr_warning("Failed to open kprobe_events file: %s\n", |
1338 | strerror(errno)); | |
4de189fe MH |
1339 | } |
1340 | return ret; | |
1341 | } | |
1342 | ||
1343 | /* Get raw string list of current kprobe_events */ | |
0e60836b | 1344 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1345 | { |
1346 | int ret, idx; | |
1347 | FILE *fp; | |
1348 | char buf[MAX_CMDLEN]; | |
1349 | char *p; | |
1350 | struct strlist *sl; | |
1351 | ||
1352 | sl = strlist__new(true, NULL); | |
1353 | ||
1354 | fp = fdopen(dup(fd), "r"); | |
1355 | while (!feof(fp)) { | |
1356 | p = fgets(buf, MAX_CMDLEN, fp); | |
1357 | if (!p) | |
1358 | break; | |
1359 | ||
1360 | idx = strlen(p) - 1; | |
1361 | if (p[idx] == '\n') | |
1362 | p[idx] = '\0'; | |
1363 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1364 | if (ret < 0) { |
1365 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1366 | strlist__delete(sl); | |
1367 | return NULL; | |
1368 | } | |
4de189fe MH |
1369 | } |
1370 | fclose(fp); | |
1371 | ||
1372 | return sl; | |
1373 | } | |
1374 | ||
278498d4 | 1375 | /* Show an event */ |
146a1439 | 1376 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1377 | { |
7e990a51 | 1378 | int i, ret; |
278498d4 | 1379 | char buf[128]; |
4235b045 | 1380 | char *place; |
278498d4 | 1381 | |
4235b045 MH |
1382 | /* Synthesize only event probe point */ |
1383 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1384 | if (!place) |
1385 | return -EINVAL; | |
4235b045 MH |
1386 | |
1387 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1388 | if (ret < 0) |
146a1439 MH |
1389 | return ret; |
1390 | ||
fb1587d8 | 1391 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1392 | |
4235b045 | 1393 | if (pev->nargs > 0) { |
278498d4 | 1394 | printf(" with"); |
7df2f329 | 1395 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1396 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1397 | buf, 128); | |
1398 | if (ret < 0) | |
1399 | break; | |
7df2f329 MH |
1400 | printf(" %s", buf); |
1401 | } | |
278498d4 MH |
1402 | } |
1403 | printf(")\n"); | |
4235b045 | 1404 | free(place); |
146a1439 | 1405 | return ret; |
278498d4 MH |
1406 | } |
1407 | ||
4de189fe | 1408 | /* List up current perf-probe events */ |
146a1439 | 1409 | int show_perf_probe_events(void) |
4de189fe | 1410 | { |
146a1439 | 1411 | int fd, ret; |
0e60836b | 1412 | struct probe_trace_event tev; |
4235b045 | 1413 | struct perf_probe_event pev; |
4de189fe MH |
1414 | struct strlist *rawlist; |
1415 | struct str_node *ent; | |
1416 | ||
72041334 | 1417 | setup_pager(); |
146a1439 MH |
1418 | ret = init_vmlinux(); |
1419 | if (ret < 0) | |
1420 | return ret; | |
4235b045 MH |
1421 | |
1422 | memset(&tev, 0, sizeof(tev)); | |
1423 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1424 | |
f4d7da49 | 1425 | fd = open_kprobe_events(false); |
146a1439 MH |
1426 | if (fd < 0) |
1427 | return fd; | |
1428 | ||
0e60836b | 1429 | rawlist = get_probe_trace_command_rawlist(fd); |
4de189fe | 1430 | close(fd); |
146a1439 MH |
1431 | if (!rawlist) |
1432 | return -ENOENT; | |
4de189fe | 1433 | |
adf365f4 | 1434 | strlist__for_each(ent, rawlist) { |
0e60836b | 1435 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1436 | if (ret >= 0) { |
1437 | ret = convert_to_perf_probe_event(&tev, &pev); | |
1438 | if (ret >= 0) | |
1439 | ret = show_perf_probe_event(&pev); | |
1440 | } | |
4235b045 | 1441 | clear_perf_probe_event(&pev); |
0e60836b | 1442 | clear_probe_trace_event(&tev); |
146a1439 MH |
1443 | if (ret < 0) |
1444 | break; | |
4de189fe | 1445 | } |
4de189fe | 1446 | strlist__delete(rawlist); |
146a1439 MH |
1447 | |
1448 | return ret; | |
4de189fe MH |
1449 | } |
1450 | ||
b498ce1f | 1451 | /* Get current perf-probe event names */ |
0e60836b | 1452 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1453 | { |
fa28244d | 1454 | char buf[128]; |
b498ce1f MH |
1455 | struct strlist *sl, *rawlist; |
1456 | struct str_node *ent; | |
0e60836b | 1457 | struct probe_trace_event tev; |
146a1439 | 1458 | int ret = 0; |
b498ce1f | 1459 | |
4235b045 | 1460 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 1461 | rawlist = get_probe_trace_command_rawlist(fd); |
e1d2017b | 1462 | sl = strlist__new(true, NULL); |
adf365f4 | 1463 | strlist__for_each(ent, rawlist) { |
0e60836b | 1464 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1465 | if (ret < 0) |
1466 | break; | |
fa28244d | 1467 | if (include_group) { |
146a1439 MH |
1468 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1469 | tev.event); | |
1470 | if (ret >= 0) | |
1471 | ret = strlist__add(sl, buf); | |
fa28244d | 1472 | } else |
146a1439 | 1473 | ret = strlist__add(sl, tev.event); |
0e60836b | 1474 | clear_probe_trace_event(&tev); |
146a1439 MH |
1475 | if (ret < 0) |
1476 | break; | |
b498ce1f | 1477 | } |
b498ce1f MH |
1478 | strlist__delete(rawlist); |
1479 | ||
146a1439 MH |
1480 | if (ret < 0) { |
1481 | strlist__delete(sl); | |
1482 | return NULL; | |
1483 | } | |
b498ce1f MH |
1484 | return sl; |
1485 | } | |
1486 | ||
0e60836b | 1487 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 1488 | { |
6eca8cc3 | 1489 | int ret = 0; |
0e60836b | 1490 | char *buf = synthesize_probe_trace_command(tev); |
50656eec | 1491 | |
146a1439 | 1492 | if (!buf) { |
0e60836b | 1493 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
1494 | return -EINVAL; |
1495 | } | |
1496 | ||
fa28244d | 1497 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1498 | if (!probe_event_dry_run) { |
1499 | ret = write(fd, buf, strlen(buf)); | |
1500 | if (ret <= 0) | |
146a1439 MH |
1501 | pr_warning("Failed to write event: %s\n", |
1502 | strerror(errno)); | |
f4d7da49 | 1503 | } |
4235b045 | 1504 | free(buf); |
146a1439 | 1505 | return ret; |
50656eec MH |
1506 | } |
1507 | ||
146a1439 MH |
1508 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1509 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1510 | { |
1511 | int i, ret; | |
17f88fcd MH |
1512 | |
1513 | /* Try no suffix */ | |
1514 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1515 | if (ret < 0) { |
1516 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1517 | return ret; | |
1518 | } | |
17f88fcd | 1519 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1520 | return 0; |
17f88fcd | 1521 | |
d761b08b MH |
1522 | if (!allow_suffix) { |
1523 | pr_warning("Error: event \"%s\" already exists. " | |
1524 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1525 | return -EEXIST; |
d761b08b MH |
1526 | } |
1527 | ||
17f88fcd MH |
1528 | /* Try to add suffix */ |
1529 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1530 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1531 | if (ret < 0) { |
1532 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1533 | return ret; | |
1534 | } | |
b498ce1f MH |
1535 | if (!strlist__has_entry(namelist, buf)) |
1536 | break; | |
1537 | } | |
146a1439 MH |
1538 | if (i == MAX_EVENT_INDEX) { |
1539 | pr_warning("Too many events are on the same function.\n"); | |
1540 | ret = -ERANGE; | |
1541 | } | |
1542 | ||
1543 | return ret; | |
b498ce1f MH |
1544 | } |
1545 | ||
0e60836b SD |
1546 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
1547 | struct probe_trace_event *tevs, | |
146a1439 | 1548 | int ntevs, bool allow_suffix) |
50656eec | 1549 | { |
146a1439 | 1550 | int i, fd, ret; |
0e60836b | 1551 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
1552 | char buf[64]; |
1553 | const char *event, *group; | |
b498ce1f | 1554 | struct strlist *namelist; |
50656eec | 1555 | |
f4d7da49 | 1556 | fd = open_kprobe_events(true); |
146a1439 MH |
1557 | if (fd < 0) |
1558 | return fd; | |
b498ce1f | 1559 | /* Get current event names */ |
0e60836b | 1560 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
1561 | if (!namelist) { |
1562 | pr_debug("Failed to get current event list.\n"); | |
1563 | return -EIO; | |
1564 | } | |
4235b045 | 1565 | |
146a1439 | 1566 | ret = 0; |
4235b045 | 1567 | printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1568 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1569 | tev = &tevs[i]; |
1570 | if (pev->event) | |
1571 | event = pev->event; | |
1572 | else | |
1573 | if (pev->point.function) | |
1574 | event = pev->point.function; | |
1575 | else | |
1576 | event = tev->point.symbol; | |
1577 | if (pev->group) | |
1578 | group = pev->group; | |
1579 | else | |
1580 | group = PERFPROBE_GROUP; | |
1581 | ||
1582 | /* Get an unused new event name */ | |
146a1439 MH |
1583 | ret = get_new_event_name(buf, 64, event, |
1584 | namelist, allow_suffix); | |
1585 | if (ret < 0) | |
1586 | break; | |
4235b045 MH |
1587 | event = buf; |
1588 | ||
02b95dad MH |
1589 | tev->event = strdup(event); |
1590 | tev->group = strdup(group); | |
1591 | if (tev->event == NULL || tev->group == NULL) { | |
1592 | ret = -ENOMEM; | |
1593 | break; | |
1594 | } | |
0e60836b | 1595 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
1596 | if (ret < 0) |
1597 | break; | |
4235b045 MH |
1598 | /* Add added event name to namelist */ |
1599 | strlist__add(namelist, event); | |
1600 | ||
1601 | /* Trick here - save current event/group */ | |
1602 | event = pev->event; | |
1603 | group = pev->group; | |
1604 | pev->event = tev->event; | |
1605 | pev->group = tev->group; | |
1606 | show_perf_probe_event(pev); | |
1607 | /* Trick here - restore current event/group */ | |
1608 | pev->event = (char *)event; | |
1609 | pev->group = (char *)group; | |
1610 | ||
1611 | /* | |
1612 | * Probes after the first probe which comes from same | |
1613 | * user input are always allowed to add suffix, because | |
1614 | * there might be several addresses corresponding to | |
1615 | * one code line. | |
1616 | */ | |
1617 | allow_suffix = true; | |
50656eec | 1618 | } |
146a1439 MH |
1619 | |
1620 | if (ret >= 0) { | |
1621 | /* Show how to use the event. */ | |
1622 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
1623 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
1624 | tev->event); | |
1625 | } | |
a9b495b0 | 1626 | |
e1d2017b | 1627 | strlist__delete(namelist); |
50656eec | 1628 | close(fd); |
146a1439 | 1629 | return ret; |
50656eec | 1630 | } |
fa28244d | 1631 | |
0e60836b SD |
1632 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
1633 | struct probe_trace_event **tevs, | |
469b9b88 | 1634 | int max_tevs, const char *module) |
e0faa8d3 MH |
1635 | { |
1636 | struct symbol *sym; | |
e334016f | 1637 | int ret = 0, i; |
0e60836b | 1638 | struct probe_trace_event *tev; |
4235b045 | 1639 | |
4b4da7f7 | 1640 | /* Convert perf_probe_event with debuginfo */ |
469b9b88 | 1641 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, module); |
e334016f MH |
1642 | if (ret != 0) |
1643 | return ret; | |
e0faa8d3 | 1644 | |
4235b045 | 1645 | /* Allocate trace event buffer */ |
0e60836b | 1646 | tev = *tevs = zalloc(sizeof(struct probe_trace_event)); |
e334016f MH |
1647 | if (tev == NULL) |
1648 | return -ENOMEM; | |
4235b045 MH |
1649 | |
1650 | /* Copy parameters */ | |
02b95dad MH |
1651 | tev->point.symbol = strdup(pev->point.function); |
1652 | if (tev->point.symbol == NULL) { | |
1653 | ret = -ENOMEM; | |
1654 | goto error; | |
1655 | } | |
4235b045 | 1656 | tev->point.offset = pev->point.offset; |
04ddd04b | 1657 | tev->point.retprobe = pev->point.retprobe; |
4235b045 MH |
1658 | tev->nargs = pev->nargs; |
1659 | if (tev->nargs) { | |
0e60836b | 1660 | tev->args = zalloc(sizeof(struct probe_trace_arg) |
e334016f MH |
1661 | * tev->nargs); |
1662 | if (tev->args == NULL) { | |
02b95dad MH |
1663 | ret = -ENOMEM; |
1664 | goto error; | |
e334016f | 1665 | } |
48481938 | 1666 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1667 | if (pev->args[i].name) { |
1668 | tev->args[i].name = strdup(pev->args[i].name); | |
1669 | if (tev->args[i].name == NULL) { | |
1670 | ret = -ENOMEM; | |
1671 | goto error; | |
1672 | } | |
1673 | } | |
1674 | tev->args[i].value = strdup(pev->args[i].var); | |
1675 | if (tev->args[i].value == NULL) { | |
1676 | ret = -ENOMEM; | |
1677 | goto error; | |
1678 | } | |
1679 | if (pev->args[i].type) { | |
1680 | tev->args[i].type = strdup(pev->args[i].type); | |
1681 | if (tev->args[i].type == NULL) { | |
1682 | ret = -ENOMEM; | |
1683 | goto error; | |
1684 | } | |
1685 | } | |
48481938 | 1686 | } |
4235b045 MH |
1687 | } |
1688 | ||
1689 | /* Currently just checking function name from symbol map */ | |
469b9b88 | 1690 | sym = __find_kernel_function_by_name(tev->point.symbol, NULL); |
146a1439 MH |
1691 | if (!sym) { |
1692 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1693 | tev->point.symbol); | |
02b95dad MH |
1694 | ret = -ENOENT; |
1695 | goto error; | |
1696 | } | |
e334016f | 1697 | |
02b95dad MH |
1698 | return 1; |
1699 | error: | |
0e60836b | 1700 | clear_probe_trace_event(tev); |
02b95dad MH |
1701 | free(tev); |
1702 | *tevs = NULL; | |
e334016f | 1703 | return ret; |
4235b045 MH |
1704 | } |
1705 | ||
1706 | struct __event_package { | |
1707 | struct perf_probe_event *pev; | |
0e60836b | 1708 | struct probe_trace_event *tevs; |
4235b045 MH |
1709 | int ntevs; |
1710 | }; | |
1711 | ||
146a1439 | 1712 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
469b9b88 | 1713 | int max_tevs, const char *module, bool force_add) |
4235b045 | 1714 | { |
146a1439 | 1715 | int i, j, ret; |
4235b045 MH |
1716 | struct __event_package *pkgs; |
1717 | ||
e334016f MH |
1718 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
1719 | if (pkgs == NULL) | |
1720 | return -ENOMEM; | |
4235b045 MH |
1721 | |
1722 | /* Init vmlinux path */ | |
146a1439 | 1723 | ret = init_vmlinux(); |
449e5b24 MH |
1724 | if (ret < 0) { |
1725 | free(pkgs); | |
146a1439 | 1726 | return ret; |
449e5b24 | 1727 | } |
4235b045 MH |
1728 | |
1729 | /* Loop 1: convert all events */ | |
1730 | for (i = 0; i < npevs; i++) { | |
1731 | pkgs[i].pev = &pevs[i]; | |
1732 | /* Convert with or without debuginfo */ | |
0e60836b | 1733 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
1734 | &pkgs[i].tevs, |
1735 | max_tevs, | |
1736 | module); | |
146a1439 MH |
1737 | if (ret < 0) |
1738 | goto end; | |
1739 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
1740 | } |
1741 | ||
4235b045 | 1742 | /* Loop 2: add all events */ |
146a1439 | 1743 | for (i = 0; i < npevs && ret >= 0; i++) |
0e60836b | 1744 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 MH |
1745 | pkgs[i].ntevs, force_add); |
1746 | end: | |
449e5b24 MH |
1747 | /* Loop 3: cleanup and free trace events */ |
1748 | for (i = 0; i < npevs; i++) { | |
146a1439 | 1749 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 1750 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
449e5b24 MH |
1751 | free(pkgs[i].tevs); |
1752 | } | |
1753 | free(pkgs); | |
146a1439 MH |
1754 | |
1755 | return ret; | |
e0faa8d3 MH |
1756 | } |
1757 | ||
0e60836b | 1758 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
1759 | { |
1760 | char *p; | |
1761 | char buf[128]; | |
4235b045 | 1762 | int ret; |
bbbb521b | 1763 | |
0e60836b | 1764 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
1765 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
1766 | if (ret < 0) | |
1767 | goto error; | |
1768 | ||
bbbb521b | 1769 | p = strchr(buf + 2, ':'); |
146a1439 MH |
1770 | if (!p) { |
1771 | pr_debug("Internal error: %s should have ':' but not.\n", | |
1772 | ent->s); | |
1773 | ret = -ENOTSUP; | |
1774 | goto error; | |
1775 | } | |
bbbb521b MH |
1776 | *p = '/'; |
1777 | ||
4235b045 MH |
1778 | pr_debug("Writing event: %s\n", buf); |
1779 | ret = write(fd, buf, strlen(buf)); | |
146a1439 MH |
1780 | if (ret < 0) |
1781 | goto error; | |
1782 | ||
bbbb521b | 1783 | printf("Remove event: %s\n", ent->s); |
146a1439 MH |
1784 | return 0; |
1785 | error: | |
1786 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
1787 | return ret; | |
bbbb521b MH |
1788 | } |
1789 | ||
0e60836b | 1790 | static int del_trace_probe_event(int fd, const char *group, |
146a1439 | 1791 | const char *event, struct strlist *namelist) |
fa28244d MH |
1792 | { |
1793 | char buf[128]; | |
bbbb521b | 1794 | struct str_node *ent, *n; |
146a1439 | 1795 | int found = 0, ret = 0; |
fa28244d | 1796 | |
146a1439 MH |
1797 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
1798 | if (ret < 0) { | |
1799 | pr_err("Failed to copy event."); | |
1800 | return ret; | |
1801 | } | |
fa28244d | 1802 | |
bbbb521b MH |
1803 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
1804 | strlist__for_each_safe(ent, n, namelist) | |
1805 | if (strglobmatch(ent->s, buf)) { | |
1806 | found++; | |
0e60836b | 1807 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
1808 | if (ret < 0) |
1809 | break; | |
bbbb521b MH |
1810 | strlist__remove(namelist, ent); |
1811 | } | |
1812 | } else { | |
1813 | ent = strlist__find(namelist, buf); | |
1814 | if (ent) { | |
1815 | found++; | |
0e60836b | 1816 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
1817 | if (ret >= 0) |
1818 | strlist__remove(namelist, ent); | |
bbbb521b MH |
1819 | } |
1820 | } | |
146a1439 MH |
1821 | if (found == 0 && ret >= 0) |
1822 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
1823 | ||
1824 | return ret; | |
fa28244d MH |
1825 | } |
1826 | ||
146a1439 | 1827 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 1828 | { |
146a1439 | 1829 | int fd, ret = 0; |
fa28244d MH |
1830 | const char *group, *event; |
1831 | char *p, *str; | |
1832 | struct str_node *ent; | |
1833 | struct strlist *namelist; | |
1834 | ||
f4d7da49 | 1835 | fd = open_kprobe_events(true); |
146a1439 MH |
1836 | if (fd < 0) |
1837 | return fd; | |
1838 | ||
fa28244d | 1839 | /* Get current event names */ |
0e60836b | 1840 | namelist = get_probe_trace_event_names(fd, true); |
146a1439 MH |
1841 | if (namelist == NULL) |
1842 | return -EINVAL; | |
fa28244d | 1843 | |
adf365f4 | 1844 | strlist__for_each(ent, dellist) { |
02b95dad MH |
1845 | str = strdup(ent->s); |
1846 | if (str == NULL) { | |
1847 | ret = -ENOMEM; | |
1848 | break; | |
1849 | } | |
bbbb521b | 1850 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
1851 | p = strchr(str, ':'); |
1852 | if (p) { | |
1853 | group = str; | |
1854 | *p = '\0'; | |
1855 | event = p + 1; | |
1856 | } else { | |
bbbb521b | 1857 | group = "*"; |
fa28244d MH |
1858 | event = str; |
1859 | } | |
bbbb521b | 1860 | pr_debug("Group: %s, Event: %s\n", group, event); |
0e60836b | 1861 | ret = del_trace_probe_event(fd, group, event, namelist); |
fa28244d | 1862 | free(str); |
146a1439 MH |
1863 | if (ret < 0) |
1864 | break; | |
fa28244d MH |
1865 | } |
1866 | strlist__delete(namelist); | |
1867 | close(fd); | |
146a1439 MH |
1868 | |
1869 | return ret; | |
fa28244d MH |
1870 | } |
1871 |