Commit | Line | Data |
---|---|---|
50656eec | 1 | /* |
0e60836b | 2 | * probe-event.c : perf-probe definition to probe_events format converter |
50656eec MH |
3 | * |
4 | * Written by Masami Hiramatsu <mhiramat@redhat.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | * | |
20 | */ | |
21 | ||
50656eec MH |
22 | #include <sys/utsname.h> |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | #include <fcntl.h> | |
26 | #include <errno.h> | |
27 | #include <stdio.h> | |
28 | #include <unistd.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
4de189fe MH |
31 | #include <stdarg.h> |
32 | #include <limits.h> | |
e80711ca | 33 | #include <elf.h> |
50656eec | 34 | |
31facc5f | 35 | #include "util.h" |
50656eec | 36 | #include "event.h" |
4de189fe | 37 | #include "strlist.h" |
50656eec | 38 | #include "debug.h" |
72041334 | 39 | #include "cache.h" |
631c9def | 40 | #include "color.h" |
e0faa8d3 MH |
41 | #include "symbol.h" |
42 | #include "thread.h" | |
553873e1 | 43 | #include <api/fs/debugfs.h> |
1d037ca1 | 44 | #include "trace-event.h" /* For __maybe_unused */ |
50656eec | 45 | #include "probe-event.h" |
4235b045 | 46 | #include "probe-finder.h" |
225466f1 | 47 | #include "session.h" |
50656eec MH |
48 | |
49 | #define MAX_CMDLEN 256 | |
50656eec MH |
50 | #define PERFPROBE_GROUP "probe" |
51 | ||
f4d7da49 MH |
52 | bool probe_event_dry_run; /* Dry run flag */ |
53 | ||
146a1439 | 54 | #define semantic_error(msg ...) pr_err("Semantic error :" msg) |
50656eec | 55 | |
4de189fe | 56 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
57 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
58 | __attribute__((format(printf, 3, 4))); | |
59 | ||
4de189fe MH |
60 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
61 | { | |
62 | int ret; | |
63 | va_list ap; | |
64 | va_start(ap, format); | |
65 | ret = vsnprintf(str, size, format, ap); | |
66 | va_end(ap); | |
67 | if (ret >= (int)size) | |
68 | ret = -E2BIG; | |
69 | return ret; | |
70 | } | |
71 | ||
4b4da7f7 | 72 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp); |
981d05ad | 73 | static void clear_probe_trace_event(struct probe_trace_event *tev); |
ee45b6c2 | 74 | static struct machine *host_machine; |
e0faa8d3 | 75 | |
469b9b88 | 76 | /* Initialize symbol maps and path of vmlinux/modules */ |
ee45b6c2 | 77 | static int init_symbol_maps(bool user_only) |
e0faa8d3 | 78 | { |
146a1439 MH |
79 | int ret; |
80 | ||
e0faa8d3 | 81 | symbol_conf.sort_by_name = true; |
146a1439 MH |
82 | ret = symbol__init(); |
83 | if (ret < 0) { | |
84 | pr_debug("Failed to init symbol map.\n"); | |
85 | goto out; | |
86 | } | |
e0faa8d3 | 87 | |
ee45b6c2 MH |
88 | if (host_machine || user_only) /* already initialized */ |
89 | return 0; | |
d28c6223 | 90 | |
ee45b6c2 MH |
91 | if (symbol_conf.vmlinux_name) |
92 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
93 | ||
94 | host_machine = machine__new_host(); | |
95 | if (!host_machine) { | |
96 | pr_debug("machine__new_host() failed.\n"); | |
97 | symbol__exit(); | |
98 | ret = -1; | |
469b9b88 | 99 | } |
146a1439 MH |
100 | out: |
101 | if (ret < 0) | |
102 | pr_warning("Failed to init vmlinux path.\n"); | |
103 | return ret; | |
e0faa8d3 MH |
104 | } |
105 | ||
ee45b6c2 MH |
106 | static void exit_symbol_maps(void) |
107 | { | |
108 | if (host_machine) { | |
109 | machine__delete(host_machine); | |
110 | host_machine = NULL; | |
111 | } | |
112 | symbol__exit(); | |
113 | } | |
114 | ||
469b9b88 MH |
115 | static struct symbol *__find_kernel_function_by_name(const char *name, |
116 | struct map **mapp) | |
117 | { | |
ee45b6c2 | 118 | return machine__find_kernel_function_by_name(host_machine, name, mapp, |
469b9b88 MH |
119 | NULL); |
120 | } | |
121 | ||
8f33f7de MH |
122 | static struct symbol *__find_kernel_function(u64 addr, struct map **mapp) |
123 | { | |
124 | return machine__find_kernel_function(host_machine, addr, mapp, NULL); | |
125 | } | |
126 | ||
127 | static struct ref_reloc_sym *kernel_get_ref_reloc_sym(void) | |
128 | { | |
129 | /* kmap->ref_reloc_sym should be set if host_machine is initialized */ | |
130 | struct kmap *kmap; | |
131 | ||
132 | if (map__load(host_machine->vmlinux_maps[MAP__FUNCTION], NULL) < 0) | |
133 | return NULL; | |
134 | ||
135 | kmap = map__kmap(host_machine->vmlinux_maps[MAP__FUNCTION]); | |
136 | return kmap->ref_reloc_sym; | |
137 | } | |
138 | ||
139 | static u64 kernel_get_symbol_address_by_name(const char *name, bool reloc) | |
140 | { | |
141 | struct ref_reloc_sym *reloc_sym; | |
142 | struct symbol *sym; | |
143 | struct map *map; | |
144 | ||
145 | /* ref_reloc_sym is just a label. Need a special fix*/ | |
146 | reloc_sym = kernel_get_ref_reloc_sym(); | |
147 | if (reloc_sym && strcmp(name, reloc_sym->name) == 0) | |
148 | return (reloc) ? reloc_sym->addr : reloc_sym->unrelocated_addr; | |
149 | else { | |
150 | sym = __find_kernel_function_by_name(name, &map); | |
151 | if (sym) | |
152 | return map->unmap_ip(map, sym->start) - | |
153 | (reloc) ? 0 : map->reloc; | |
154 | } | |
155 | return 0; | |
156 | } | |
157 | ||
e80711ca MH |
158 | static struct map *kernel_get_module_map(const char *module) |
159 | { | |
160 | struct rb_node *nd; | |
ee45b6c2 | 161 | struct map_groups *grp = &host_machine->kmaps; |
e80711ca | 162 | |
14a8fd7c MH |
163 | /* A file path -- this is an offline module */ |
164 | if (module && strchr(module, '/')) | |
ee45b6c2 | 165 | return machine__new_module(host_machine, 0, module); |
14a8fd7c | 166 | |
e80711ca MH |
167 | if (!module) |
168 | module = "kernel"; | |
169 | ||
170 | for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) { | |
171 | struct map *pos = rb_entry(nd, struct map, rb_node); | |
172 | if (strncmp(pos->dso->short_name + 1, module, | |
173 | pos->dso->short_name_len - 2) == 0) { | |
174 | return pos; | |
175 | } | |
176 | } | |
177 | return NULL; | |
178 | } | |
179 | ||
180 | static struct dso *kernel_get_module_dso(const char *module) | |
469b9b88 MH |
181 | { |
182 | struct dso *dso; | |
fd930ff9 FBH |
183 | struct map *map; |
184 | const char *vmlinux_name; | |
469b9b88 MH |
185 | |
186 | if (module) { | |
ee45b6c2 | 187 | list_for_each_entry(dso, &host_machine->kernel_dsos, node) { |
469b9b88 MH |
188 | if (strncmp(dso->short_name + 1, module, |
189 | dso->short_name_len - 2) == 0) | |
190 | goto found; | |
191 | } | |
192 | pr_debug("Failed to find module %s.\n", module); | |
193 | return NULL; | |
fd930ff9 FBH |
194 | } |
195 | ||
ee45b6c2 | 196 | map = host_machine->vmlinux_maps[MAP__FUNCTION]; |
fd930ff9 FBH |
197 | dso = map->dso; |
198 | ||
199 | vmlinux_name = symbol_conf.vmlinux_name; | |
200 | if (vmlinux_name) { | |
5230fb7d | 201 | if (dso__load_vmlinux(dso, map, vmlinux_name, false, NULL) <= 0) |
fd930ff9 | 202 | return NULL; |
469b9b88 | 203 | } else { |
c3a34e06 | 204 | if (dso__load_vmlinux_path(dso, map, NULL) <= 0) { |
469b9b88 MH |
205 | pr_debug("Failed to load kernel map.\n"); |
206 | return NULL; | |
207 | } | |
208 | } | |
209 | found: | |
e80711ca MH |
210 | return dso; |
211 | } | |
212 | ||
213 | const char *kernel_get_module_path(const char *module) | |
214 | { | |
215 | struct dso *dso = kernel_get_module_dso(module); | |
216 | return (dso) ? dso->long_name : NULL; | |
469b9b88 MH |
217 | } |
218 | ||
fb7345bb MH |
219 | static int convert_exec_to_group(const char *exec, char **result) |
220 | { | |
221 | char *ptr1, *ptr2, *exec_copy; | |
222 | char buf[64]; | |
223 | int ret; | |
224 | ||
225 | exec_copy = strdup(exec); | |
226 | if (!exec_copy) | |
227 | return -ENOMEM; | |
228 | ||
229 | ptr1 = basename(exec_copy); | |
230 | if (!ptr1) { | |
231 | ret = -EINVAL; | |
232 | goto out; | |
233 | } | |
234 | ||
235 | ptr2 = strpbrk(ptr1, "-._"); | |
236 | if (ptr2) | |
237 | *ptr2 = '\0'; | |
238 | ret = e_snprintf(buf, 64, "%s_%s", PERFPROBE_GROUP, ptr1); | |
239 | if (ret < 0) | |
240 | goto out; | |
241 | ||
242 | *result = strdup(buf); | |
243 | ret = *result ? 0 : -ENOMEM; | |
244 | ||
245 | out: | |
246 | free(exec_copy); | |
247 | return ret; | |
248 | } | |
249 | ||
eb948e50 MH |
250 | static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs) |
251 | { | |
252 | int i; | |
253 | ||
254 | for (i = 0; i < ntevs; i++) | |
255 | clear_probe_trace_event(tevs + i); | |
256 | } | |
257 | ||
89fe808a | 258 | #ifdef HAVE_DWARF_SUPPORT |
a15ad2f5 | 259 | |
ff741783 MH |
260 | /* Open new debuginfo of given module */ |
261 | static struct debuginfo *open_debuginfo(const char *module) | |
e0faa8d3 | 262 | { |
a15ad2f5 | 263 | const char *path = module; |
ff741783 | 264 | |
a15ad2f5 | 265 | if (!module || !strchr(module, '/')) { |
14a8fd7c | 266 | path = kernel_get_module_path(module); |
14a8fd7c MH |
267 | if (!path) { |
268 | pr_err("Failed to find path of %s module.\n", | |
269 | module ?: "kernel"); | |
270 | return NULL; | |
271 | } | |
e0faa8d3 | 272 | } |
ff741783 | 273 | return debuginfo__new(path); |
e0faa8d3 | 274 | } |
4b4da7f7 | 275 | |
99ca4233 MH |
276 | static int get_text_start_address(const char *exec, unsigned long *address) |
277 | { | |
278 | Elf *elf; | |
279 | GElf_Ehdr ehdr; | |
280 | GElf_Shdr shdr; | |
281 | int fd, ret = -ENOENT; | |
282 | ||
283 | fd = open(exec, O_RDONLY); | |
284 | if (fd < 0) | |
285 | return -errno; | |
286 | ||
287 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
288 | if (elf == NULL) | |
289 | return -EINVAL; | |
290 | ||
291 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
292 | goto out; | |
293 | ||
294 | if (!elf_section_by_name(elf, &ehdr, &shdr, ".text", NULL)) | |
295 | goto out; | |
296 | ||
297 | *address = shdr.sh_addr - shdr.sh_offset; | |
298 | ret = 0; | |
299 | out: | |
300 | elf_end(elf); | |
301 | return ret; | |
302 | } | |
303 | ||
5a6f6314 MH |
304 | /* |
305 | * Convert trace point to probe point with debuginfo | |
306 | */ | |
307 | static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp, | |
308 | struct perf_probe_point *pp, | |
309 | bool is_kprobe) | |
310 | { | |
311 | struct debuginfo *dinfo = NULL; | |
312 | unsigned long stext = 0; | |
313 | u64 addr = tp->address; | |
314 | int ret = -ENOENT; | |
315 | ||
316 | /* convert the address to dwarf address */ | |
317 | if (!is_kprobe) { | |
318 | if (!addr) { | |
319 | ret = -EINVAL; | |
320 | goto error; | |
321 | } | |
322 | ret = get_text_start_address(tp->module, &stext); | |
323 | if (ret < 0) | |
324 | goto error; | |
325 | addr += stext; | |
326 | } else { | |
327 | addr = kernel_get_symbol_address_by_name(tp->symbol, false); | |
328 | if (addr == 0) | |
329 | goto error; | |
330 | addr += tp->offset; | |
331 | } | |
332 | ||
333 | pr_debug("try to find information at %" PRIx64 " in %s\n", addr, | |
334 | tp->module ? : "kernel"); | |
335 | ||
336 | dinfo = open_debuginfo(tp->module); | |
337 | if (dinfo) { | |
338 | ret = debuginfo__find_probe_point(dinfo, | |
339 | (unsigned long)addr, pp); | |
340 | debuginfo__delete(dinfo); | |
341 | } else { | |
342 | pr_debug("Failed to open debuginfo at 0x%" PRIx64 "\n", addr); | |
343 | ret = -ENOENT; | |
344 | } | |
345 | ||
346 | if (ret > 0) { | |
347 | pp->retprobe = tp->retprobe; | |
348 | return 0; | |
349 | } | |
350 | error: | |
351 | pr_debug("Failed to find corresponding probes from debuginfo.\n"); | |
352 | return ret ? : -ENOENT; | |
353 | } | |
354 | ||
fb7345bb MH |
355 | static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs, |
356 | int ntevs, const char *exec) | |
357 | { | |
358 | int i, ret = 0; | |
eb948e50 | 359 | unsigned long stext = 0; |
fb7345bb MH |
360 | |
361 | if (!exec) | |
362 | return 0; | |
363 | ||
364 | ret = get_text_start_address(exec, &stext); | |
365 | if (ret < 0) | |
366 | return ret; | |
367 | ||
368 | for (i = 0; i < ntevs && ret >= 0; i++) { | |
981a2379 | 369 | /* point.address is the addres of point.symbol + point.offset */ |
eb948e50 | 370 | tevs[i].point.address -= stext; |
fb7345bb | 371 | tevs[i].point.module = strdup(exec); |
eb948e50 | 372 | if (!tevs[i].point.module) { |
fb7345bb MH |
373 | ret = -ENOMEM; |
374 | break; | |
375 | } | |
376 | tevs[i].uprobes = true; | |
377 | } | |
378 | ||
379 | return ret; | |
380 | } | |
381 | ||
190b57fc MH |
382 | static int add_module_to_probe_trace_events(struct probe_trace_event *tevs, |
383 | int ntevs, const char *module) | |
384 | { | |
14a8fd7c MH |
385 | int i, ret = 0; |
386 | char *tmp; | |
387 | ||
388 | if (!module) | |
389 | return 0; | |
390 | ||
391 | tmp = strrchr(module, '/'); | |
392 | if (tmp) { | |
393 | /* This is a module path -- get the module name */ | |
394 | module = strdup(tmp + 1); | |
395 | if (!module) | |
396 | return -ENOMEM; | |
397 | tmp = strchr(module, '.'); | |
398 | if (tmp) | |
399 | *tmp = '\0'; | |
400 | tmp = (char *)module; /* For free() */ | |
401 | } | |
402 | ||
190b57fc MH |
403 | for (i = 0; i < ntevs; i++) { |
404 | tevs[i].point.module = strdup(module); | |
14a8fd7c MH |
405 | if (!tevs[i].point.module) { |
406 | ret = -ENOMEM; | |
407 | break; | |
408 | } | |
190b57fc | 409 | } |
14a8fd7c | 410 | |
f5385650 | 411 | free(tmp); |
14a8fd7c | 412 | return ret; |
190b57fc MH |
413 | } |
414 | ||
dfef99cd MH |
415 | /* Post processing the probe events */ |
416 | static int post_process_probe_trace_events(struct probe_trace_event *tevs, | |
417 | int ntevs, const char *module, | |
418 | bool uprobe) | |
419 | { | |
420 | struct ref_reloc_sym *reloc_sym; | |
421 | char *tmp; | |
422 | int i; | |
423 | ||
424 | if (uprobe) | |
425 | return add_exec_to_probe_trace_events(tevs, ntevs, module); | |
426 | ||
427 | /* Note that currently ref_reloc_sym based probe is not for drivers */ | |
428 | if (module) | |
429 | return add_module_to_probe_trace_events(tevs, ntevs, module); | |
430 | ||
8f33f7de | 431 | reloc_sym = kernel_get_ref_reloc_sym(); |
dfef99cd MH |
432 | if (!reloc_sym) { |
433 | pr_warning("Relocated base symbol is not found!\n"); | |
434 | return -EINVAL; | |
435 | } | |
436 | ||
437 | for (i = 0; i < ntevs; i++) { | |
438 | if (tevs[i].point.address) { | |
439 | tmp = strdup(reloc_sym->name); | |
440 | if (!tmp) | |
441 | return -ENOMEM; | |
442 | free(tevs[i].point.symbol); | |
443 | tevs[i].point.symbol = tmp; | |
444 | tevs[i].point.offset = tevs[i].point.address - | |
445 | reloc_sym->unrelocated_addr; | |
446 | } | |
447 | } | |
448 | return 0; | |
449 | } | |
450 | ||
4b4da7f7 | 451 | /* Try to find perf_probe_event with debuginfo */ |
0e60836b | 452 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
190b57fc | 453 | struct probe_trace_event **tevs, |
4eced234 | 454 | int max_tevs, const char *target) |
4b4da7f7 MH |
455 | { |
456 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
225466f1 | 457 | struct debuginfo *dinfo; |
190b57fc | 458 | int ntevs, ret = 0; |
4b4da7f7 | 459 | |
225466f1 SD |
460 | dinfo = open_debuginfo(target); |
461 | ||
ff741783 | 462 | if (!dinfo) { |
146a1439 MH |
463 | if (need_dwarf) { |
464 | pr_warning("Failed to open debuginfo file.\n"); | |
ff741783 | 465 | return -ENOENT; |
146a1439 | 466 | } |
ff741783 | 467 | pr_debug("Could not open debuginfo. Try to use symbols.\n"); |
4b4da7f7 MH |
468 | return 0; |
469 | } | |
470 | ||
dfef99cd | 471 | pr_debug("Try to find probe point from debuginfo.\n"); |
ff741783 MH |
472 | /* Searching trace events corresponding to a probe event */ |
473 | ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs); | |
474 | ||
475 | debuginfo__delete(dinfo); | |
4b4da7f7 | 476 | |
146a1439 | 477 | if (ntevs > 0) { /* Succeeded to find trace events */ |
dfef99cd MH |
478 | pr_debug("Found %d probe_trace_events.\n", ntevs); |
479 | ret = post_process_probe_trace_events(*tevs, ntevs, | |
480 | target, pev->uprobes); | |
981d05ad MH |
481 | if (ret < 0) { |
482 | clear_probe_trace_events(*tevs, ntevs); | |
483 | zfree(tevs); | |
484 | } | |
190b57fc | 485 | return ret < 0 ? ret : ntevs; |
146a1439 | 486 | } |
4b4da7f7 | 487 | |
146a1439 MH |
488 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
489 | pr_warning("Probe point '%s' not found.\n", | |
490 | synthesize_perf_probe_point(&pev->point)); | |
491 | return -ENOENT; | |
492 | } | |
493 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
494 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
495 | if (ntevs == -EBADF) { | |
496 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
497 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
498 | if (!need_dwarf) { | |
0e43e5d2 | 499 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
500 | return 0; |
501 | } | |
4b4da7f7 | 502 | } |
15eca306 | 503 | return ntevs; |
4b4da7f7 MH |
504 | } |
505 | ||
7cf0b79e MH |
506 | /* |
507 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
508 | * and chop off leading directories that do not exist. Result is passed back as | |
509 | * a newly allocated path on success. | |
510 | * Return 0 if file was found and readable, -errno otherwise. | |
511 | */ | |
6a330a3c MH |
512 | static int get_real_path(const char *raw_path, const char *comp_dir, |
513 | char **new_path) | |
7cf0b79e | 514 | { |
6a330a3c MH |
515 | const char *prefix = symbol_conf.source_prefix; |
516 | ||
517 | if (!prefix) { | |
518 | if (raw_path[0] != '/' && comp_dir) | |
519 | /* If not an absolute path, try to use comp_dir */ | |
520 | prefix = comp_dir; | |
521 | else { | |
522 | if (access(raw_path, R_OK) == 0) { | |
523 | *new_path = strdup(raw_path); | |
524 | return 0; | |
525 | } else | |
526 | return -errno; | |
527 | } | |
7cf0b79e MH |
528 | } |
529 | ||
6a330a3c | 530 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
7cf0b79e MH |
531 | if (!*new_path) |
532 | return -ENOMEM; | |
533 | ||
534 | for (;;) { | |
6a330a3c | 535 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
7cf0b79e MH |
536 | |
537 | if (access(*new_path, R_OK) == 0) | |
538 | return 0; | |
539 | ||
6a330a3c MH |
540 | if (!symbol_conf.source_prefix) |
541 | /* In case of searching comp_dir, don't retry */ | |
542 | return -errno; | |
543 | ||
7cf0b79e MH |
544 | switch (errno) { |
545 | case ENAMETOOLONG: | |
546 | case ENOENT: | |
547 | case EROFS: | |
548 | case EFAULT: | |
549 | raw_path = strchr(++raw_path, '/'); | |
550 | if (!raw_path) { | |
04662523 | 551 | zfree(new_path); |
7cf0b79e MH |
552 | return -ENOENT; |
553 | } | |
554 | continue; | |
555 | ||
556 | default: | |
04662523 | 557 | zfree(new_path); |
7cf0b79e MH |
558 | return -errno; |
559 | } | |
560 | } | |
561 | } | |
562 | ||
4b4da7f7 MH |
563 | #define LINEBUF_SIZE 256 |
564 | #define NR_ADDITIONAL_LINES 2 | |
565 | ||
fde52dbd | 566 | static int __show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
567 | { |
568 | char buf[LINEBUF_SIZE]; | |
befe3414 FBH |
569 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
570 | const char *prefix = NULL; | |
4b4da7f7 | 571 | |
befe3414 | 572 | do { |
4b4da7f7 MH |
573 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
574 | goto error; | |
befe3414 FBH |
575 | if (skip) |
576 | continue; | |
577 | if (!prefix) { | |
578 | prefix = show_num ? "%7d " : " "; | |
579 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 580 | } |
befe3414 FBH |
581 | color_fprintf(stdout, color, "%s", buf); |
582 | ||
583 | } while (strchr(buf, '\n') == NULL); | |
146a1439 | 584 | |
fde52dbd | 585 | return 1; |
4b4da7f7 | 586 | error: |
fde52dbd | 587 | if (ferror(fp)) { |
32b2b6ec | 588 | pr_warning("File read error: %s\n", strerror(errno)); |
fde52dbd FBH |
589 | return -1; |
590 | } | |
591 | return 0; | |
592 | } | |
146a1439 | 593 | |
fde52dbd FBH |
594 | static int _show_one_line(FILE *fp, int l, bool skip, bool show_num) |
595 | { | |
596 | int rv = __show_one_line(fp, l, skip, show_num); | |
597 | if (rv == 0) { | |
598 | pr_warning("Source file is shorter than expected.\n"); | |
599 | rv = -1; | |
600 | } | |
601 | return rv; | |
4b4da7f7 MH |
602 | } |
603 | ||
fde52dbd FBH |
604 | #define show_one_line_with_num(f,l) _show_one_line(f,l,false,true) |
605 | #define show_one_line(f,l) _show_one_line(f,l,false,false) | |
606 | #define skip_one_line(f,l) _show_one_line(f,l,true,false) | |
607 | #define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false) | |
608 | ||
4b4da7f7 MH |
609 | /* |
610 | * Show line-range always requires debuginfo to find source file and | |
611 | * line number. | |
612 | */ | |
ee45b6c2 | 613 | static int __show_line_range(struct line_range *lr, const char *module) |
4b4da7f7 | 614 | { |
d3b63d7a | 615 | int l = 1; |
5a62257a | 616 | struct int_node *ln; |
ff741783 | 617 | struct debuginfo *dinfo; |
4b4da7f7 | 618 | FILE *fp; |
ff741783 | 619 | int ret; |
7cf0b79e | 620 | char *tmp; |
4b4da7f7 MH |
621 | |
622 | /* Search a line range */ | |
ff741783 MH |
623 | dinfo = open_debuginfo(module); |
624 | if (!dinfo) { | |
146a1439 | 625 | pr_warning("Failed to open debuginfo file.\n"); |
ff741783 | 626 | return -ENOENT; |
146a1439 MH |
627 | } |
628 | ||
ff741783 MH |
629 | ret = debuginfo__find_line_range(dinfo, lr); |
630 | debuginfo__delete(dinfo); | |
5ee05b88 | 631 | if (ret == 0 || ret == -ENOENT) { |
146a1439 MH |
632 | pr_warning("Specified source line is not found.\n"); |
633 | return -ENOENT; | |
634 | } else if (ret < 0) { | |
5ee05b88 | 635 | pr_warning("Debuginfo analysis failed.\n"); |
146a1439 MH |
636 | return ret; |
637 | } | |
4b4da7f7 | 638 | |
7cf0b79e MH |
639 | /* Convert source file path */ |
640 | tmp = lr->path; | |
6a330a3c | 641 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
7cf0b79e MH |
642 | free(tmp); /* Free old path */ |
643 | if (ret < 0) { | |
5ee05b88 | 644 | pr_warning("Failed to find source file path.\n"); |
7cf0b79e MH |
645 | return ret; |
646 | } | |
647 | ||
4b4da7f7 MH |
648 | setup_pager(); |
649 | ||
650 | if (lr->function) | |
8737ebde | 651 | fprintf(stdout, "<%s@%s:%d>\n", lr->function, lr->path, |
4b4da7f7 MH |
652 | lr->start - lr->offset); |
653 | else | |
62c15fc4 | 654 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
655 | |
656 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
657 | if (fp == NULL) { |
658 | pr_warning("Failed to open %s: %s\n", lr->path, | |
659 | strerror(errno)); | |
660 | return -errno; | |
661 | } | |
4b4da7f7 | 662 | /* Skip to starting line number */ |
44b81e92 | 663 | while (l < lr->start) { |
fde52dbd | 664 | ret = skip_one_line(fp, l++); |
44b81e92 FBH |
665 | if (ret < 0) |
666 | goto end; | |
667 | } | |
4b4da7f7 | 668 | |
5a62257a MH |
669 | intlist__for_each(ln, lr->line_list) { |
670 | for (; ln->i > l; l++) { | |
fde52dbd | 671 | ret = show_one_line(fp, l - lr->offset); |
44b81e92 FBH |
672 | if (ret < 0) |
673 | goto end; | |
674 | } | |
fde52dbd | 675 | ret = show_one_line_with_num(fp, l++ - lr->offset); |
146a1439 MH |
676 | if (ret < 0) |
677 | goto end; | |
4b4da7f7 MH |
678 | } |
679 | ||
680 | if (lr->end == INT_MAX) | |
681 | lr->end = l + NR_ADDITIONAL_LINES; | |
fde52dbd FBH |
682 | while (l <= lr->end) { |
683 | ret = show_one_line_or_eof(fp, l++ - lr->offset); | |
684 | if (ret <= 0) | |
44b81e92 FBH |
685 | break; |
686 | } | |
146a1439 | 687 | end: |
4b4da7f7 | 688 | fclose(fp); |
146a1439 | 689 | return ret; |
4b4da7f7 MH |
690 | } |
691 | ||
ee45b6c2 MH |
692 | int show_line_range(struct line_range *lr, const char *module) |
693 | { | |
694 | int ret; | |
695 | ||
696 | ret = init_symbol_maps(false); | |
697 | if (ret < 0) | |
698 | return ret; | |
699 | ret = __show_line_range(lr, module); | |
700 | exit_symbol_maps(); | |
701 | ||
702 | return ret; | |
703 | } | |
704 | ||
ff741783 MH |
705 | static int show_available_vars_at(struct debuginfo *dinfo, |
706 | struct perf_probe_event *pev, | |
bd09d7b5 MH |
707 | int max_vls, struct strfilter *_filter, |
708 | bool externs) | |
cf6eb489 MH |
709 | { |
710 | char *buf; | |
bd09d7b5 | 711 | int ret, i, nvars; |
cf6eb489 MH |
712 | struct str_node *node; |
713 | struct variable_list *vls = NULL, *vl; | |
bd09d7b5 | 714 | const char *var; |
cf6eb489 MH |
715 | |
716 | buf = synthesize_perf_probe_point(&pev->point); | |
717 | if (!buf) | |
718 | return -EINVAL; | |
719 | pr_debug("Searching variables at %s\n", buf); | |
720 | ||
ff741783 MH |
721 | ret = debuginfo__find_available_vars_at(dinfo, pev, &vls, |
722 | max_vls, externs); | |
bd09d7b5 | 723 | if (ret <= 0) { |
69e96eaa MH |
724 | if (ret == 0 || ret == -ENOENT) { |
725 | pr_err("Failed to find the address of %s\n", buf); | |
726 | ret = -ENOENT; | |
727 | } else | |
728 | pr_warning("Debuginfo analysis failed.\n"); | |
bd09d7b5 MH |
729 | goto end; |
730 | } | |
69e96eaa | 731 | |
bd09d7b5 MH |
732 | /* Some variables are found */ |
733 | fprintf(stdout, "Available variables at %s\n", buf); | |
734 | for (i = 0; i < ret; i++) { | |
735 | vl = &vls[i]; | |
736 | /* | |
737 | * A probe point might be converted to | |
738 | * several trace points. | |
739 | */ | |
740 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
741 | vl->point.offset); | |
74cf249d | 742 | zfree(&vl->point.symbol); |
bd09d7b5 MH |
743 | nvars = 0; |
744 | if (vl->vars) { | |
745 | strlist__for_each(node, vl->vars) { | |
746 | var = strchr(node->s, '\t') + 1; | |
747 | if (strfilter__compare(_filter, var)) { | |
cf6eb489 | 748 | fprintf(stdout, "\t\t%s\n", node->s); |
bd09d7b5 MH |
749 | nvars++; |
750 | } | |
751 | } | |
752 | strlist__delete(vl->vars); | |
cf6eb489 | 753 | } |
bd09d7b5 MH |
754 | if (nvars == 0) |
755 | fprintf(stdout, "\t\t(No matched variables)\n"); | |
756 | } | |
757 | free(vls); | |
758 | end: | |
cf6eb489 MH |
759 | free(buf); |
760 | return ret; | |
761 | } | |
762 | ||
763 | /* Show available variables on given probe point */ | |
764 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
bd09d7b5 MH |
765 | int max_vls, const char *module, |
766 | struct strfilter *_filter, bool externs) | |
cf6eb489 | 767 | { |
ff741783 MH |
768 | int i, ret = 0; |
769 | struct debuginfo *dinfo; | |
cf6eb489 | 770 | |
ee45b6c2 | 771 | ret = init_symbol_maps(false); |
cf6eb489 MH |
772 | if (ret < 0) |
773 | return ret; | |
774 | ||
ff741783 MH |
775 | dinfo = open_debuginfo(module); |
776 | if (!dinfo) { | |
777 | pr_warning("Failed to open debuginfo file.\n"); | |
ee45b6c2 MH |
778 | ret = -ENOENT; |
779 | goto out; | |
ff741783 MH |
780 | } |
781 | ||
cf6eb489 MH |
782 | setup_pager(); |
783 | ||
ff741783 MH |
784 | for (i = 0; i < npevs && ret >= 0; i++) |
785 | ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter, | |
bd09d7b5 | 786 | externs); |
ff741783 MH |
787 | |
788 | debuginfo__delete(dinfo); | |
ee45b6c2 MH |
789 | out: |
790 | exit_symbol_maps(); | |
cf6eb489 MH |
791 | return ret; |
792 | } | |
793 | ||
89fe808a | 794 | #else /* !HAVE_DWARF_SUPPORT */ |
4b4da7f7 | 795 | |
5a6f6314 MH |
796 | static int |
797 | find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused, | |
798 | struct perf_probe_point *pp __maybe_unused, | |
799 | bool is_kprobe __maybe_unused) | |
4b4da7f7 | 800 | { |
5a6f6314 | 801 | return -ENOSYS; |
4b4da7f7 MH |
802 | } |
803 | ||
0e60836b | 804 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
1d037ca1 | 805 | struct probe_trace_event **tevs __maybe_unused, |
1d027ee9 ACM |
806 | int max_tevs __maybe_unused, |
807 | const char *target __maybe_unused) | |
4b4da7f7 | 808 | { |
146a1439 MH |
809 | if (perf_probe_event_need_dwarf(pev)) { |
810 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
811 | return -ENOSYS; | |
812 | } | |
225466f1 | 813 | |
4b4da7f7 MH |
814 | return 0; |
815 | } | |
816 | ||
1d037ca1 IT |
817 | int show_line_range(struct line_range *lr __maybe_unused, |
818 | const char *module __maybe_unused) | |
4b4da7f7 | 819 | { |
146a1439 MH |
820 | pr_warning("Debuginfo-analysis is not supported.\n"); |
821 | return -ENOSYS; | |
4b4da7f7 MH |
822 | } |
823 | ||
1d037ca1 IT |
824 | int show_available_vars(struct perf_probe_event *pevs __maybe_unused, |
825 | int npevs __maybe_unused, int max_vls __maybe_unused, | |
826 | const char *module __maybe_unused, | |
827 | struct strfilter *filter __maybe_unused, | |
828 | bool externs __maybe_unused) | |
cf6eb489 MH |
829 | { |
830 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
831 | return -ENOSYS; | |
832 | } | |
e0faa8d3 MH |
833 | #endif |
834 | ||
e53b00d3 MH |
835 | void line_range__clear(struct line_range *lr) |
836 | { | |
e53b00d3 MH |
837 | free(lr->function); |
838 | free(lr->file); | |
839 | free(lr->path); | |
840 | free(lr->comp_dir); | |
5a62257a | 841 | intlist__delete(lr->line_list); |
e53b00d3 MH |
842 | memset(lr, 0, sizeof(*lr)); |
843 | } | |
844 | ||
5a62257a | 845 | int line_range__init(struct line_range *lr) |
e53b00d3 MH |
846 | { |
847 | memset(lr, 0, sizeof(*lr)); | |
5a62257a MH |
848 | lr->line_list = intlist__new(NULL); |
849 | if (!lr->line_list) | |
850 | return -ENOMEM; | |
851 | else | |
852 | return 0; | |
e53b00d3 MH |
853 | } |
854 | ||
21dd9ae5 FBH |
855 | static int parse_line_num(char **ptr, int *val, const char *what) |
856 | { | |
857 | const char *start = *ptr; | |
858 | ||
859 | errno = 0; | |
860 | *val = strtol(*ptr, ptr, 0); | |
861 | if (errno || *ptr == start) { | |
862 | semantic_error("'%s' is not a valid number.\n", what); | |
863 | return -EINVAL; | |
864 | } | |
865 | return 0; | |
866 | } | |
867 | ||
9d95b580 FBH |
868 | /* |
869 | * Stuff 'lr' according to the line range described by 'arg'. | |
870 | * The line range syntax is described by: | |
871 | * | |
872 | * SRC[:SLN[+NUM|-ELN]] | |
e116dfa1 | 873 | * FNC[@SRC][:SLN[+NUM|-ELN]] |
9d95b580 | 874 | */ |
146a1439 | 875 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def | 876 | { |
e116dfa1 | 877 | char *range, *file, *name = strdup(arg); |
21dd9ae5 FBH |
878 | int err; |
879 | ||
880 | if (!name) | |
881 | return -ENOMEM; | |
882 | ||
883 | lr->start = 0; | |
884 | lr->end = INT_MAX; | |
885 | ||
886 | range = strchr(name, ':'); | |
887 | if (range) { | |
888 | *range++ = '\0'; | |
889 | ||
890 | err = parse_line_num(&range, &lr->start, "start line"); | |
891 | if (err) | |
892 | goto err; | |
893 | ||
894 | if (*range == '+' || *range == '-') { | |
895 | const char c = *range++; | |
896 | ||
897 | err = parse_line_num(&range, &lr->end, "end line"); | |
898 | if (err) | |
899 | goto err; | |
900 | ||
901 | if (c == '+') { | |
902 | lr->end += lr->start; | |
903 | /* | |
904 | * Adjust the number of lines here. | |
905 | * If the number of lines == 1, the | |
906 | * the end of line should be equal to | |
907 | * the start of line. | |
908 | */ | |
909 | lr->end--; | |
910 | } | |
911 | } | |
9d95b580 | 912 | |
d3b63d7a | 913 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); |
21dd9ae5 FBH |
914 | |
915 | err = -EINVAL; | |
d3b63d7a | 916 | if (lr->start > lr->end) { |
631c9def | 917 | semantic_error("Start line must be smaller" |
146a1439 | 918 | " than end line.\n"); |
21dd9ae5 | 919 | goto err; |
146a1439 | 920 | } |
21dd9ae5 FBH |
921 | if (*range != '\0') { |
922 | semantic_error("Tailing with invalid str '%s'.\n", range); | |
923 | goto err; | |
146a1439 | 924 | } |
d3b63d7a | 925 | } |
02b95dad | 926 | |
e116dfa1 MH |
927 | file = strchr(name, '@'); |
928 | if (file) { | |
929 | *file = '\0'; | |
930 | lr->file = strdup(++file); | |
931 | if (lr->file == NULL) { | |
932 | err = -ENOMEM; | |
933 | goto err; | |
934 | } | |
935 | lr->function = name; | |
936 | } else if (strchr(name, '.')) | |
21dd9ae5 | 937 | lr->file = name; |
631c9def | 938 | else |
21dd9ae5 | 939 | lr->function = name; |
146a1439 MH |
940 | |
941 | return 0; | |
21dd9ae5 FBH |
942 | err: |
943 | free(name); | |
944 | return err; | |
631c9def MH |
945 | } |
946 | ||
b7702a21 MH |
947 | /* Check the name is good for event/group */ |
948 | static bool check_event_name(const char *name) | |
949 | { | |
950 | if (!isalpha(*name) && *name != '_') | |
951 | return false; | |
952 | while (*++name != '\0') { | |
953 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
954 | return false; | |
955 | } | |
956 | return true; | |
957 | } | |
958 | ||
50656eec | 959 | /* Parse probepoint definition. */ |
146a1439 | 960 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 961 | { |
4235b045 | 962 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
963 | char *ptr, *tmp; |
964 | char c, nc = 0; | |
965 | /* | |
966 | * <Syntax> | |
2a9c8c36 MH |
967 | * perf probe [EVENT=]SRC[:LN|;PTN] |
968 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
969 | * |
970 | * TODO:Group name support | |
50656eec MH |
971 | */ |
972 | ||
2a9c8c36 MH |
973 | ptr = strpbrk(arg, ";=@+%"); |
974 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
975 | *ptr = '\0'; |
976 | tmp = ptr + 1; | |
146a1439 MH |
977 | if (strchr(arg, ':')) { |
978 | semantic_error("Group name is not supported yet.\n"); | |
979 | return -ENOTSUP; | |
980 | } | |
981 | if (!check_event_name(arg)) { | |
b7702a21 | 982 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
983 | "follow C symbol-naming rule.\n", arg); |
984 | return -EINVAL; | |
985 | } | |
02b95dad MH |
986 | pev->event = strdup(arg); |
987 | if (pev->event == NULL) | |
988 | return -ENOMEM; | |
4235b045 | 989 | pev->group = NULL; |
af663d75 MH |
990 | arg = tmp; |
991 | } | |
992 | ||
2a9c8c36 | 993 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
994 | if (ptr) { |
995 | nc = *ptr; | |
996 | *ptr++ = '\0'; | |
997 | } | |
998 | ||
02b95dad MH |
999 | tmp = strdup(arg); |
1000 | if (tmp == NULL) | |
1001 | return -ENOMEM; | |
1002 | ||
50656eec | 1003 | /* Check arg is function or file and copy it */ |
02b95dad MH |
1004 | if (strchr(tmp, '.')) /* File */ |
1005 | pp->file = tmp; | |
50656eec | 1006 | else /* Function */ |
02b95dad | 1007 | pp->function = tmp; |
50656eec MH |
1008 | |
1009 | /* Parse other options */ | |
1010 | while (ptr) { | |
1011 | arg = ptr; | |
1012 | c = nc; | |
2a9c8c36 | 1013 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
1014 | pp->lazy_line = strdup(arg); |
1015 | if (pp->lazy_line == NULL) | |
1016 | return -ENOMEM; | |
2a9c8c36 MH |
1017 | break; |
1018 | } | |
1019 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
1020 | if (ptr) { |
1021 | nc = *ptr; | |
1022 | *ptr++ = '\0'; | |
1023 | } | |
1024 | switch (c) { | |
1025 | case ':': /* Line number */ | |
1026 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 1027 | if (*tmp != '\0') { |
2a9c8c36 | 1028 | semantic_error("There is non-digit char" |
146a1439 MH |
1029 | " in line number.\n"); |
1030 | return -EINVAL; | |
1031 | } | |
50656eec MH |
1032 | break; |
1033 | case '+': /* Byte offset from a symbol */ | |
1034 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 1035 | if (*tmp != '\0') { |
2a9c8c36 | 1036 | semantic_error("There is non-digit character" |
146a1439 MH |
1037 | " in offset.\n"); |
1038 | return -EINVAL; | |
1039 | } | |
50656eec MH |
1040 | break; |
1041 | case '@': /* File name */ | |
146a1439 MH |
1042 | if (pp->file) { |
1043 | semantic_error("SRC@SRC is not allowed.\n"); | |
1044 | return -EINVAL; | |
1045 | } | |
02b95dad MH |
1046 | pp->file = strdup(arg); |
1047 | if (pp->file == NULL) | |
1048 | return -ENOMEM; | |
50656eec MH |
1049 | break; |
1050 | case '%': /* Probe places */ | |
1051 | if (strcmp(arg, "return") == 0) { | |
1052 | pp->retprobe = 1; | |
146a1439 MH |
1053 | } else { /* Others not supported yet */ |
1054 | semantic_error("%%%s is not supported.\n", arg); | |
1055 | return -ENOTSUP; | |
1056 | } | |
50656eec | 1057 | break; |
146a1439 MH |
1058 | default: /* Buggy case */ |
1059 | pr_err("This program has a bug at %s:%d.\n", | |
1060 | __FILE__, __LINE__); | |
1061 | return -ENOTSUP; | |
50656eec MH |
1062 | break; |
1063 | } | |
1064 | } | |
1065 | ||
1066 | /* Exclusion check */ | |
146a1439 | 1067 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
1068 | semantic_error("Lazy pattern can't be used with" |
1069 | " line number.\n"); | |
146a1439 MH |
1070 | return -EINVAL; |
1071 | } | |
2a9c8c36 | 1072 | |
146a1439 | 1073 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 1074 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
1075 | return -EINVAL; |
1076 | } | |
2a9c8c36 | 1077 | |
146a1439 | 1078 | if (pp->line && pp->offset) { |
0e43e5d2 | 1079 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
1080 | return -EINVAL; |
1081 | } | |
50656eec | 1082 | |
146a1439 | 1083 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 1084 | semantic_error("File always requires line number or " |
0e43e5d2 | 1085 | "lazy pattern.\n"); |
146a1439 MH |
1086 | return -EINVAL; |
1087 | } | |
50656eec | 1088 | |
146a1439 | 1089 | if (pp->offset && !pp->function) { |
0e43e5d2 | 1090 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
1091 | return -EINVAL; |
1092 | } | |
50656eec | 1093 | |
146a1439 | 1094 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 1095 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
1096 | return -EINVAL; |
1097 | } | |
50656eec | 1098 | |
146a1439 | 1099 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 1100 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 1101 | "return probe.\n"); |
146a1439 MH |
1102 | return -EINVAL; |
1103 | } | |
50656eec | 1104 | |
4235b045 | 1105 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
1106 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
1107 | pp->lazy_line); | |
146a1439 | 1108 | return 0; |
50656eec MH |
1109 | } |
1110 | ||
7df2f329 | 1111 | /* Parse perf-probe event argument */ |
146a1439 | 1112 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 1113 | { |
b2a3c12b | 1114 | char *tmp, *goodname; |
7df2f329 MH |
1115 | struct perf_probe_arg_field **fieldp; |
1116 | ||
1117 | pr_debug("parsing arg: %s into ", str); | |
1118 | ||
48481938 MH |
1119 | tmp = strchr(str, '='); |
1120 | if (tmp) { | |
02b95dad MH |
1121 | arg->name = strndup(str, tmp - str); |
1122 | if (arg->name == NULL) | |
1123 | return -ENOMEM; | |
11a1ca35 | 1124 | pr_debug("name:%s ", arg->name); |
48481938 MH |
1125 | str = tmp + 1; |
1126 | } | |
1127 | ||
11a1ca35 MH |
1128 | tmp = strchr(str, ':'); |
1129 | if (tmp) { /* Type setting */ | |
1130 | *tmp = '\0'; | |
02b95dad MH |
1131 | arg->type = strdup(tmp + 1); |
1132 | if (arg->type == NULL) | |
1133 | return -ENOMEM; | |
11a1ca35 MH |
1134 | pr_debug("type:%s ", arg->type); |
1135 | } | |
1136 | ||
b2a3c12b | 1137 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
1138 | if (!is_c_varname(str) || !tmp) { |
1139 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
1140 | arg->var = strdup(str); |
1141 | if (arg->var == NULL) | |
1142 | return -ENOMEM; | |
48481938 | 1143 | pr_debug("%s\n", arg->var); |
146a1439 | 1144 | return 0; |
7df2f329 MH |
1145 | } |
1146 | ||
b2a3c12b | 1147 | /* Structure fields or array element */ |
02b95dad MH |
1148 | arg->var = strndup(str, tmp - str); |
1149 | if (arg->var == NULL) | |
1150 | return -ENOMEM; | |
b2a3c12b | 1151 | goodname = arg->var; |
48481938 | 1152 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
1153 | fieldp = &arg->field; |
1154 | ||
1155 | do { | |
e334016f MH |
1156 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
1157 | if (*fieldp == NULL) | |
1158 | return -ENOMEM; | |
b2a3c12b MH |
1159 | if (*tmp == '[') { /* Array */ |
1160 | str = tmp; | |
1161 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 1162 | (*fieldp)->ref = true; |
b2a3c12b MH |
1163 | if (*tmp != ']' || tmp == str + 1) { |
1164 | semantic_error("Array index must be a" | |
1165 | " number.\n"); | |
1166 | return -EINVAL; | |
1167 | } | |
1168 | tmp++; | |
1169 | if (*tmp == '\0') | |
1170 | tmp = NULL; | |
1171 | } else { /* Structure */ | |
1172 | if (*tmp == '.') { | |
1173 | str = tmp + 1; | |
1174 | (*fieldp)->ref = false; | |
1175 | } else if (tmp[1] == '>') { | |
1176 | str = tmp + 2; | |
1177 | (*fieldp)->ref = true; | |
1178 | } else { | |
1179 | semantic_error("Argument parse error: %s\n", | |
1180 | str); | |
1181 | return -EINVAL; | |
1182 | } | |
1183 | tmp = strpbrk(str, "-.["); | |
146a1439 | 1184 | } |
7df2f329 | 1185 | if (tmp) { |
02b95dad MH |
1186 | (*fieldp)->name = strndup(str, tmp - str); |
1187 | if ((*fieldp)->name == NULL) | |
1188 | return -ENOMEM; | |
b2a3c12b MH |
1189 | if (*str != '[') |
1190 | goodname = (*fieldp)->name; | |
7df2f329 MH |
1191 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
1192 | fieldp = &(*fieldp)->next; | |
1193 | } | |
1194 | } while (tmp); | |
02b95dad MH |
1195 | (*fieldp)->name = strdup(str); |
1196 | if ((*fieldp)->name == NULL) | |
1197 | return -ENOMEM; | |
b2a3c12b MH |
1198 | if (*str != '[') |
1199 | goodname = (*fieldp)->name; | |
7df2f329 | 1200 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 1201 | |
b2a3c12b | 1202 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 1203 | if (!arg->name) { |
b2a3c12b | 1204 | arg->name = strdup(goodname); |
02b95dad MH |
1205 | if (arg->name == NULL) |
1206 | return -ENOMEM; | |
1207 | } | |
146a1439 | 1208 | return 0; |
7df2f329 MH |
1209 | } |
1210 | ||
4235b045 | 1211 | /* Parse perf-probe event command */ |
146a1439 | 1212 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 1213 | { |
e1c01d61 | 1214 | char **argv; |
146a1439 | 1215 | int argc, i, ret = 0; |
fac13fd5 | 1216 | |
4235b045 | 1217 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1218 | if (!argv) { |
1219 | pr_debug("Failed to split arguments.\n"); | |
1220 | return -ENOMEM; | |
1221 | } | |
1222 | if (argc - 1 > MAX_PROBE_ARGS) { | |
1223 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
1224 | ret = -ERANGE; | |
1225 | goto out; | |
1226 | } | |
50656eec | 1227 | /* Parse probe point */ |
146a1439 MH |
1228 | ret = parse_perf_probe_point(argv[0], pev); |
1229 | if (ret < 0) | |
1230 | goto out; | |
50656eec | 1231 | |
e1c01d61 | 1232 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 1233 | pev->nargs = argc - 1; |
e334016f MH |
1234 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1235 | if (pev->args == NULL) { | |
1236 | ret = -ENOMEM; | |
1237 | goto out; | |
1238 | } | |
146a1439 MH |
1239 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
1240 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
1241 | if (ret >= 0 && | |
1242 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 1243 | semantic_error("You can't specify local variable for" |
146a1439 MH |
1244 | " kretprobe.\n"); |
1245 | ret = -EINVAL; | |
1246 | } | |
e1c01d61 | 1247 | } |
146a1439 | 1248 | out: |
e1c01d61 | 1249 | argv_free(argv); |
146a1439 MH |
1250 | |
1251 | return ret; | |
50656eec MH |
1252 | } |
1253 | ||
4235b045 MH |
1254 | /* Return true if this perf_probe_event requires debuginfo */ |
1255 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
1256 | { | |
1257 | int i; | |
1258 | ||
1259 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
1260 | return true; | |
1261 | ||
1262 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 1263 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
1264 | return true; |
1265 | ||
1266 | return false; | |
1267 | } | |
1268 | ||
0e60836b SD |
1269 | /* Parse probe_events event into struct probe_point */ |
1270 | static int parse_probe_trace_command(const char *cmd, | |
190b57fc | 1271 | struct probe_trace_event *tev) |
4de189fe | 1272 | { |
0e60836b | 1273 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
1274 | char pr; |
1275 | char *p; | |
bcbd0040 | 1276 | char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str; |
4de189fe MH |
1277 | int ret, i, argc; |
1278 | char **argv; | |
1279 | ||
0e60836b | 1280 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 1281 | argv = argv_split(cmd, &argc); |
146a1439 MH |
1282 | if (!argv) { |
1283 | pr_debug("Failed to split arguments.\n"); | |
1284 | return -ENOMEM; | |
1285 | } | |
1286 | if (argc < 2) { | |
1287 | semantic_error("Too few probe arguments.\n"); | |
1288 | ret = -ERANGE; | |
1289 | goto out; | |
1290 | } | |
4de189fe MH |
1291 | |
1292 | /* Scan event and group name. */ | |
bcbd0040 IT |
1293 | argv0_str = strdup(argv[0]); |
1294 | if (argv0_str == NULL) { | |
1295 | ret = -ENOMEM; | |
1296 | goto out; | |
1297 | } | |
1298 | fmt1_str = strtok_r(argv0_str, ":", &fmt); | |
1299 | fmt2_str = strtok_r(NULL, "/", &fmt); | |
1300 | fmt3_str = strtok_r(NULL, " \t", &fmt); | |
1301 | if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL | |
1302 | || fmt3_str == NULL) { | |
146a1439 MH |
1303 | semantic_error("Failed to parse event name: %s\n", argv[0]); |
1304 | ret = -EINVAL; | |
1305 | goto out; | |
1306 | } | |
bcbd0040 IT |
1307 | pr = fmt1_str[0]; |
1308 | tev->group = strdup(fmt2_str); | |
1309 | tev->event = strdup(fmt3_str); | |
1310 | if (tev->group == NULL || tev->event == NULL) { | |
1311 | ret = -ENOMEM; | |
1312 | goto out; | |
1313 | } | |
4235b045 | 1314 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 1315 | |
4235b045 | 1316 | tp->retprobe = (pr == 'r'); |
4de189fe | 1317 | |
190b57fc MH |
1318 | /* Scan module name(if there), function name and offset */ |
1319 | p = strchr(argv[1], ':'); | |
1320 | if (p) { | |
1321 | tp->module = strndup(argv[1], p - argv[1]); | |
1322 | p++; | |
1323 | } else | |
1324 | p = argv[1]; | |
bcbd0040 | 1325 | fmt1_str = strtok_r(p, "+", &fmt); |
5a6f6314 MH |
1326 | if (fmt1_str[0] == '0') /* only the address started with 0x */ |
1327 | tp->address = strtoul(fmt1_str, NULL, 0); | |
1328 | else { | |
1329 | /* Only the symbol-based probe has offset */ | |
1330 | tp->symbol = strdup(fmt1_str); | |
1331 | if (tp->symbol == NULL) { | |
1332 | ret = -ENOMEM; | |
1333 | goto out; | |
1334 | } | |
1335 | fmt2_str = strtok_r(NULL, "", &fmt); | |
1336 | if (fmt2_str == NULL) | |
1337 | tp->offset = 0; | |
1338 | else | |
1339 | tp->offset = strtoul(fmt2_str, NULL, 10); | |
bcbd0040 | 1340 | } |
4de189fe | 1341 | |
4235b045 | 1342 | tev->nargs = argc - 2; |
0e60836b | 1343 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
1344 | if (tev->args == NULL) { |
1345 | ret = -ENOMEM; | |
1346 | goto out; | |
1347 | } | |
4235b045 | 1348 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
1349 | p = strchr(argv[i + 2], '='); |
1350 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
1351 | *p++ = '\0'; |
1352 | else | |
1353 | p = argv[i + 2]; | |
02b95dad | 1354 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 1355 | /* TODO: parse regs and offset */ |
02b95dad MH |
1356 | tev->args[i].value = strdup(p); |
1357 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
1358 | ret = -ENOMEM; | |
1359 | goto out; | |
1360 | } | |
4de189fe | 1361 | } |
146a1439 MH |
1362 | ret = 0; |
1363 | out: | |
bcbd0040 | 1364 | free(argv0_str); |
4de189fe | 1365 | argv_free(argv); |
146a1439 | 1366 | return ret; |
4de189fe MH |
1367 | } |
1368 | ||
7df2f329 MH |
1369 | /* Compose only probe arg */ |
1370 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
1371 | { | |
1372 | struct perf_probe_arg_field *field = pa->field; | |
1373 | int ret; | |
1374 | char *tmp = buf; | |
1375 | ||
48481938 MH |
1376 | if (pa->name && pa->var) |
1377 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
1378 | else | |
1379 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
1380 | if (ret <= 0) |
1381 | goto error; | |
1382 | tmp += ret; | |
1383 | len -= ret; | |
1384 | ||
1385 | while (field) { | |
b2a3c12b MH |
1386 | if (field->name[0] == '[') |
1387 | ret = e_snprintf(tmp, len, "%s", field->name); | |
1388 | else | |
1389 | ret = e_snprintf(tmp, len, "%s%s", | |
1390 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
1391 | if (ret <= 0) |
1392 | goto error; | |
1393 | tmp += ret; | |
1394 | len -= ret; | |
1395 | field = field->next; | |
1396 | } | |
11a1ca35 MH |
1397 | |
1398 | if (pa->type) { | |
1399 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
1400 | if (ret <= 0) | |
1401 | goto error; | |
1402 | tmp += ret; | |
1403 | len -= ret; | |
1404 | } | |
1405 | ||
7df2f329 MH |
1406 | return tmp - buf; |
1407 | error: | |
0e43e5d2 | 1408 | pr_debug("Failed to synthesize perf probe argument: %s\n", |
146a1439 MH |
1409 | strerror(-ret)); |
1410 | return ret; | |
7df2f329 MH |
1411 | } |
1412 | ||
4235b045 MH |
1413 | /* Compose only probe point (not argument) */ |
1414 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1415 | { |
fb1587d8 MH |
1416 | char *buf, *tmp; |
1417 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1418 | int ret, len; | |
4de189fe | 1419 | |
e334016f MH |
1420 | buf = zalloc(MAX_CMDLEN); |
1421 | if (buf == NULL) { | |
1422 | ret = -ENOMEM; | |
1423 | goto error; | |
1424 | } | |
4de189fe | 1425 | if (pp->offset) { |
fb1587d8 | 1426 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1427 | if (ret <= 0) |
1428 | goto error; | |
1429 | } | |
1430 | if (pp->line) { | |
fb1587d8 MH |
1431 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1432 | if (ret <= 0) | |
1433 | goto error; | |
1434 | } | |
1435 | if (pp->file) { | |
32ae2ade FBH |
1436 | tmp = pp->file; |
1437 | len = strlen(tmp); | |
1438 | if (len > 30) { | |
1439 | tmp = strchr(pp->file + len - 30, '/'); | |
1440 | tmp = tmp ? tmp + 1 : pp->file + len - 30; | |
1441 | } | |
1442 | ret = e_snprintf(file, 32, "@%s", tmp); | |
4de189fe MH |
1443 | if (ret <= 0) |
1444 | goto error; | |
1445 | } | |
1446 | ||
1447 | if (pp->function) | |
fb1587d8 MH |
1448 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1449 | offs, pp->retprobe ? "%return" : "", line, | |
1450 | file); | |
4de189fe | 1451 | else |
fb1587d8 | 1452 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1453 | if (ret <= 0) |
1454 | goto error; | |
1455 | ||
1456 | return buf; | |
7ef17aaf | 1457 | error: |
0e43e5d2 | 1458 | pr_debug("Failed to synthesize perf probe point: %s\n", |
146a1439 | 1459 | strerror(-ret)); |
f5385650 | 1460 | free(buf); |
146a1439 | 1461 | return NULL; |
7ef17aaf MH |
1462 | } |
1463 | ||
4235b045 MH |
1464 | #if 0 |
1465 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1466 | { |
1467 | char *buf; | |
1468 | int i, len, ret; | |
1469 | ||
4235b045 MH |
1470 | buf = synthesize_perf_probe_point(&pev->point); |
1471 | if (!buf) | |
1472 | return NULL; | |
4de189fe | 1473 | |
4235b045 MH |
1474 | len = strlen(buf); |
1475 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1476 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1477 | pev->args[i].name); |
1478 | if (ret <= 0) { | |
1479 | free(buf); | |
1480 | return NULL; | |
1481 | } | |
4de189fe MH |
1482 | len += ret; |
1483 | } | |
4de189fe | 1484 | |
4235b045 MH |
1485 | return buf; |
1486 | } | |
1487 | #endif | |
1488 | ||
0e60836b | 1489 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1490 | char **buf, size_t *buflen, |
1491 | int depth) | |
1492 | { | |
1493 | int ret; | |
1494 | if (ref->next) { | |
0e60836b | 1495 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1496 | buflen, depth + 1); |
1497 | if (depth < 0) | |
1498 | goto out; | |
1499 | } | |
1500 | ||
1501 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1502 | if (ret < 0) | |
1503 | depth = ret; | |
1504 | else { | |
1505 | *buf += ret; | |
1506 | *buflen -= ret; | |
1507 | } | |
1508 | out: | |
1509 | return depth; | |
4de189fe | 1510 | |
4de189fe MH |
1511 | } |
1512 | ||
0e60836b | 1513 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1514 | char *buf, size_t buflen) |
50656eec | 1515 | { |
0e60836b | 1516 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1517 | int ret, depth = 0; |
1518 | char *tmp = buf; | |
1519 | ||
1520 | /* Argument name or separator */ | |
1521 | if (arg->name) | |
1522 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1523 | else | |
1524 | ret = e_snprintf(buf, buflen, " "); | |
1525 | if (ret < 0) | |
1526 | return ret; | |
1527 | buf += ret; | |
1528 | buflen -= ret; | |
1529 | ||
b7dcb857 MH |
1530 | /* Special case: @XXX */ |
1531 | if (arg->value[0] == '@' && arg->ref) | |
1532 | ref = ref->next; | |
1533 | ||
4235b045 | 1534 | /* Dereferencing arguments */ |
b7dcb857 | 1535 | if (ref) { |
0e60836b | 1536 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1537 | &buflen, 1); |
1538 | if (depth < 0) | |
1539 | return depth; | |
1540 | } | |
1541 | ||
1542 | /* Print argument value */ | |
b7dcb857 MH |
1543 | if (arg->value[0] == '@' && arg->ref) |
1544 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1545 | arg->ref->offset); | |
1546 | else | |
1547 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1548 | if (ret < 0) |
1549 | return ret; | |
1550 | buf += ret; | |
1551 | buflen -= ret; | |
1552 | ||
1553 | /* Closing */ | |
1554 | while (depth--) { | |
1555 | ret = e_snprintf(buf, buflen, ")"); | |
1556 | if (ret < 0) | |
1557 | return ret; | |
1558 | buf += ret; | |
1559 | buflen -= ret; | |
1560 | } | |
4984912e MH |
1561 | /* Print argument type */ |
1562 | if (arg->type) { | |
1563 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1564 | if (ret <= 0) | |
1565 | return ret; | |
1566 | buf += ret; | |
1567 | } | |
4235b045 MH |
1568 | |
1569 | return buf - tmp; | |
1570 | } | |
1571 | ||
0e60836b | 1572 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1573 | { |
0e60836b | 1574 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1575 | char *buf; |
1576 | int i, len, ret; | |
1577 | ||
e334016f MH |
1578 | buf = zalloc(MAX_CMDLEN); |
1579 | if (buf == NULL) | |
1580 | return NULL; | |
1581 | ||
eb948e50 MH |
1582 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s ", tp->retprobe ? 'r' : 'p', |
1583 | tev->group, tev->event); | |
1584 | if (len <= 0) | |
1585 | goto error; | |
1586 | ||
1587 | /* Uprobes must have tp->address and tp->module */ | |
1588 | if (tev->uprobes && (!tp->address || !tp->module)) | |
1589 | goto error; | |
1590 | ||
1591 | /* Use the tp->address for uprobes */ | |
225466f1 | 1592 | if (tev->uprobes) |
eb948e50 MH |
1593 | ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s:0x%lx", |
1594 | tp->module, tp->address); | |
225466f1 | 1595 | else |
eb948e50 | 1596 | ret = e_snprintf(buf + len, MAX_CMDLEN - len, "%s%s%s+%lu", |
225466f1 SD |
1597 | tp->module ?: "", tp->module ? ":" : "", |
1598 | tp->symbol, tp->offset); | |
1599 | ||
eb948e50 | 1600 | if (ret <= 0) |
50656eec | 1601 | goto error; |
eb948e50 | 1602 | len += ret; |
50656eec | 1603 | |
4235b045 | 1604 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1605 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1606 | MAX_CMDLEN - len); |
4de189fe | 1607 | if (ret <= 0) |
50656eec MH |
1608 | goto error; |
1609 | len += ret; | |
1610 | } | |
50656eec | 1611 | |
4235b045 | 1612 | return buf; |
50656eec | 1613 | error: |
4235b045 MH |
1614 | free(buf); |
1615 | return NULL; | |
1616 | } | |
50656eec | 1617 | |
5a6f6314 MH |
1618 | static int find_perf_probe_point_from_map(struct probe_trace_point *tp, |
1619 | struct perf_probe_point *pp, | |
1620 | bool is_kprobe) | |
1621 | { | |
1622 | struct symbol *sym = NULL; | |
1623 | struct map *map; | |
1624 | u64 addr; | |
1625 | int ret = -ENOENT; | |
1626 | ||
1627 | if (!is_kprobe) { | |
1628 | map = dso__new_map(tp->module); | |
1629 | if (!map) | |
1630 | goto out; | |
1631 | addr = tp->address; | |
1632 | sym = map__find_symbol(map, addr, NULL); | |
1633 | } else { | |
1634 | addr = kernel_get_symbol_address_by_name(tp->symbol, true); | |
1635 | if (addr) { | |
1636 | addr += tp->offset; | |
1637 | sym = __find_kernel_function(addr, &map); | |
1638 | } | |
1639 | } | |
1640 | if (!sym) | |
1641 | goto out; | |
1642 | ||
1643 | pp->retprobe = tp->retprobe; | |
1644 | pp->offset = addr - map->unmap_ip(map, sym->start); | |
1645 | pp->function = strdup(sym->name); | |
1646 | ret = pp->function ? 0 : -ENOMEM; | |
1647 | ||
1648 | out: | |
1649 | if (map && !is_kprobe) { | |
1650 | dso__delete(map->dso); | |
1651 | map__delete(map); | |
1652 | } | |
1653 | ||
1654 | return ret; | |
1655 | } | |
1656 | ||
1657 | static int convert_to_perf_probe_point(struct probe_trace_point *tp, | |
1658 | struct perf_probe_point *pp, | |
1659 | bool is_kprobe) | |
1660 | { | |
1661 | char buf[128]; | |
1662 | int ret; | |
1663 | ||
1664 | ret = find_perf_probe_point_from_dwarf(tp, pp, is_kprobe); | |
1665 | if (!ret) | |
1666 | return 0; | |
1667 | ret = find_perf_probe_point_from_map(tp, pp, is_kprobe); | |
1668 | if (!ret) | |
1669 | return 0; | |
1670 | ||
1671 | pr_debug("Failed to find probe point from both of dwarf and map.\n"); | |
1672 | ||
1673 | if (tp->symbol) { | |
1674 | pp->function = strdup(tp->symbol); | |
1675 | pp->offset = tp->offset; | |
1676 | } else if (!tp->module && !is_kprobe) { | |
1677 | ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address); | |
1678 | if (ret < 0) | |
1679 | return ret; | |
1680 | pp->function = strdup(buf); | |
1681 | pp->offset = 0; | |
1682 | } | |
1683 | if (pp->function == NULL) | |
1684 | return -ENOMEM; | |
1685 | ||
1686 | pp->retprobe = tp->retprobe; | |
1687 | ||
1688 | return 0; | |
1689 | } | |
1690 | ||
0e60836b | 1691 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
225466f1 | 1692 | struct perf_probe_event *pev, bool is_kprobe) |
4235b045 | 1693 | { |
02b95dad | 1694 | char buf[64] = ""; |
146a1439 | 1695 | int i, ret; |
4235b045 | 1696 | |
4b4da7f7 | 1697 | /* Convert event/group name */ |
02b95dad MH |
1698 | pev->event = strdup(tev->event); |
1699 | pev->group = strdup(tev->group); | |
1700 | if (pev->event == NULL || pev->group == NULL) | |
1701 | return -ENOMEM; | |
fb1587d8 | 1702 | |
4b4da7f7 | 1703 | /* Convert trace_point to probe_point */ |
5a6f6314 | 1704 | ret = convert_to_perf_probe_point(&tev->point, &pev->point, is_kprobe); |
146a1439 MH |
1705 | if (ret < 0) |
1706 | return ret; | |
4b4da7f7 | 1707 | |
4235b045 MH |
1708 | /* Convert trace_arg to probe_arg */ |
1709 | pev->nargs = tev->nargs; | |
e334016f MH |
1710 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1711 | if (pev->args == NULL) | |
1712 | return -ENOMEM; | |
02b95dad | 1713 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1714 | if (tev->args[i].name) |
02b95dad | 1715 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1716 | else { |
0e60836b | 1717 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1718 | buf, 64); |
02b95dad | 1719 | pev->args[i].name = strdup(buf); |
4235b045 | 1720 | } |
02b95dad MH |
1721 | if (pev->args[i].name == NULL && ret >= 0) |
1722 | ret = -ENOMEM; | |
1723 | } | |
146a1439 MH |
1724 | |
1725 | if (ret < 0) | |
1726 | clear_perf_probe_event(pev); | |
1727 | ||
1728 | return ret; | |
4235b045 MH |
1729 | } |
1730 | ||
1731 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1732 | { | |
1733 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1734 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1735 | int i; |
1736 | ||
f5385650 ACM |
1737 | free(pev->event); |
1738 | free(pev->group); | |
1739 | free(pp->file); | |
1740 | free(pp->function); | |
1741 | free(pp->lazy_line); | |
1742 | ||
7df2f329 | 1743 | for (i = 0; i < pev->nargs; i++) { |
f5385650 ACM |
1744 | free(pev->args[i].name); |
1745 | free(pev->args[i].var); | |
1746 | free(pev->args[i].type); | |
7df2f329 MH |
1747 | field = pev->args[i].field; |
1748 | while (field) { | |
1749 | next = field->next; | |
74cf249d | 1750 | zfree(&field->name); |
7df2f329 MH |
1751 | free(field); |
1752 | field = next; | |
1753 | } | |
1754 | } | |
f5385650 | 1755 | free(pev->args); |
4235b045 MH |
1756 | memset(pev, 0, sizeof(*pev)); |
1757 | } | |
1758 | ||
0e60836b | 1759 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1760 | { |
0e60836b | 1761 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1762 | int i; |
1763 | ||
f5385650 ACM |
1764 | free(tev->event); |
1765 | free(tev->group); | |
1766 | free(tev->point.symbol); | |
1767 | free(tev->point.module); | |
4235b045 | 1768 | for (i = 0; i < tev->nargs; i++) { |
f5385650 ACM |
1769 | free(tev->args[i].name); |
1770 | free(tev->args[i].value); | |
1771 | free(tev->args[i].type); | |
4235b045 MH |
1772 | ref = tev->args[i].ref; |
1773 | while (ref) { | |
1774 | next = ref->next; | |
1775 | free(ref); | |
1776 | ref = next; | |
1777 | } | |
1778 | } | |
f5385650 | 1779 | free(tev->args); |
4235b045 | 1780 | memset(tev, 0, sizeof(*tev)); |
50656eec MH |
1781 | } |
1782 | ||
225466f1 SD |
1783 | static void print_warn_msg(const char *file, bool is_kprobe) |
1784 | { | |
1785 | ||
1786 | if (errno == ENOENT) { | |
1787 | const char *config; | |
1788 | ||
1789 | if (!is_kprobe) | |
1790 | config = "CONFIG_UPROBE_EVENTS"; | |
1791 | else | |
1792 | config = "CONFIG_KPROBE_EVENTS"; | |
1793 | ||
1794 | pr_warning("%s file does not exist - please rebuild kernel" | |
1795 | " with %s.\n", file, config); | |
1796 | } else | |
1797 | pr_warning("Failed to open %s file: %s\n", file, | |
1798 | strerror(errno)); | |
1799 | } | |
1800 | ||
1801 | static int open_probe_events(const char *trace_file, bool readwrite, | |
1802 | bool is_kprobe) | |
4de189fe MH |
1803 | { |
1804 | char buf[PATH_MAX]; | |
7ca5989d | 1805 | const char *__debugfs; |
4de189fe MH |
1806 | int ret; |
1807 | ||
7ca5989d MH |
1808 | __debugfs = debugfs_find_mountpoint(); |
1809 | if (__debugfs == NULL) { | |
1810 | pr_warning("Debugfs is not mounted.\n"); | |
1811 | return -ENOENT; | |
1812 | } | |
1813 | ||
225466f1 | 1814 | ret = e_snprintf(buf, PATH_MAX, "%s/%s", __debugfs, trace_file); |
146a1439 | 1815 | if (ret >= 0) { |
7ca5989d | 1816 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1817 | if (readwrite && !probe_event_dry_run) |
1818 | ret = open(buf, O_RDWR, O_APPEND); | |
1819 | else | |
1820 | ret = open(buf, O_RDONLY, 0); | |
f4d7da49 | 1821 | |
225466f1 SD |
1822 | if (ret < 0) |
1823 | print_warn_msg(buf, is_kprobe); | |
4de189fe MH |
1824 | } |
1825 | return ret; | |
1826 | } | |
1827 | ||
225466f1 SD |
1828 | static int open_kprobe_events(bool readwrite) |
1829 | { | |
1830 | return open_probe_events("tracing/kprobe_events", readwrite, true); | |
1831 | } | |
1832 | ||
1833 | static int open_uprobe_events(bool readwrite) | |
1834 | { | |
1835 | return open_probe_events("tracing/uprobe_events", readwrite, false); | |
1836 | } | |
1837 | ||
1838 | /* Get raw string list of current kprobe_events or uprobe_events */ | |
0e60836b | 1839 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1840 | { |
1841 | int ret, idx; | |
1842 | FILE *fp; | |
1843 | char buf[MAX_CMDLEN]; | |
1844 | char *p; | |
1845 | struct strlist *sl; | |
1846 | ||
1847 | sl = strlist__new(true, NULL); | |
1848 | ||
1849 | fp = fdopen(dup(fd), "r"); | |
1850 | while (!feof(fp)) { | |
1851 | p = fgets(buf, MAX_CMDLEN, fp); | |
1852 | if (!p) | |
1853 | break; | |
1854 | ||
1855 | idx = strlen(p) - 1; | |
1856 | if (p[idx] == '\n') | |
1857 | p[idx] = '\0'; | |
1858 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1859 | if (ret < 0) { |
1860 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1861 | strlist__delete(sl); | |
1862 | return NULL; | |
1863 | } | |
4de189fe MH |
1864 | } |
1865 | fclose(fp); | |
1866 | ||
1867 | return sl; | |
1868 | } | |
1869 | ||
278498d4 | 1870 | /* Show an event */ |
fb226ccd MH |
1871 | static int show_perf_probe_event(struct perf_probe_event *pev, |
1872 | const char *module) | |
278498d4 | 1873 | { |
7e990a51 | 1874 | int i, ret; |
278498d4 | 1875 | char buf[128]; |
4235b045 | 1876 | char *place; |
278498d4 | 1877 | |
4235b045 MH |
1878 | /* Synthesize only event probe point */ |
1879 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1880 | if (!place) |
1881 | return -EINVAL; | |
4235b045 MH |
1882 | |
1883 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1884 | if (ret < 0) |
146a1439 MH |
1885 | return ret; |
1886 | ||
fb1587d8 | 1887 | printf(" %-20s (on %s", buf, place); |
fb226ccd MH |
1888 | if (module) |
1889 | printf(" in %s", module); | |
278498d4 | 1890 | |
4235b045 | 1891 | if (pev->nargs > 0) { |
278498d4 | 1892 | printf(" with"); |
7df2f329 | 1893 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1894 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1895 | buf, 128); | |
1896 | if (ret < 0) | |
1897 | break; | |
7df2f329 MH |
1898 | printf(" %s", buf); |
1899 | } | |
278498d4 MH |
1900 | } |
1901 | printf(")\n"); | |
4235b045 | 1902 | free(place); |
146a1439 | 1903 | return ret; |
278498d4 MH |
1904 | } |
1905 | ||
225466f1 | 1906 | static int __show_perf_probe_events(int fd, bool is_kprobe) |
4de189fe | 1907 | { |
225466f1 | 1908 | int ret = 0; |
0e60836b | 1909 | struct probe_trace_event tev; |
4235b045 | 1910 | struct perf_probe_event pev; |
4de189fe MH |
1911 | struct strlist *rawlist; |
1912 | struct str_node *ent; | |
1913 | ||
4235b045 MH |
1914 | memset(&tev, 0, sizeof(tev)); |
1915 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1916 | |
0e60836b | 1917 | rawlist = get_probe_trace_command_rawlist(fd); |
146a1439 MH |
1918 | if (!rawlist) |
1919 | return -ENOENT; | |
4de189fe | 1920 | |
adf365f4 | 1921 | strlist__for_each(ent, rawlist) { |
0e60836b | 1922 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 | 1923 | if (ret >= 0) { |
225466f1 SD |
1924 | ret = convert_to_perf_probe_event(&tev, &pev, |
1925 | is_kprobe); | |
146a1439 | 1926 | if (ret >= 0) |
fb226ccd MH |
1927 | ret = show_perf_probe_event(&pev, |
1928 | tev.point.module); | |
146a1439 | 1929 | } |
4235b045 | 1930 | clear_perf_probe_event(&pev); |
0e60836b | 1931 | clear_probe_trace_event(&tev); |
146a1439 MH |
1932 | if (ret < 0) |
1933 | break; | |
4de189fe | 1934 | } |
4de189fe | 1935 | strlist__delete(rawlist); |
146a1439 MH |
1936 | |
1937 | return ret; | |
4de189fe MH |
1938 | } |
1939 | ||
225466f1 SD |
1940 | /* List up current perf-probe events */ |
1941 | int show_perf_probe_events(void) | |
1942 | { | |
1943 | int fd, ret; | |
1944 | ||
1945 | setup_pager(); | |
1946 | fd = open_kprobe_events(false); | |
1947 | ||
1948 | if (fd < 0) | |
1949 | return fd; | |
1950 | ||
ee45b6c2 | 1951 | ret = init_symbol_maps(false); |
225466f1 SD |
1952 | if (ret < 0) |
1953 | return ret; | |
1954 | ||
1955 | ret = __show_perf_probe_events(fd, true); | |
1956 | close(fd); | |
1957 | ||
1958 | fd = open_uprobe_events(false); | |
1959 | if (fd >= 0) { | |
1960 | ret = __show_perf_probe_events(fd, false); | |
1961 | close(fd); | |
1962 | } | |
1963 | ||
ee45b6c2 | 1964 | exit_symbol_maps(); |
225466f1 SD |
1965 | return ret; |
1966 | } | |
1967 | ||
b498ce1f | 1968 | /* Get current perf-probe event names */ |
0e60836b | 1969 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1970 | { |
fa28244d | 1971 | char buf[128]; |
b498ce1f MH |
1972 | struct strlist *sl, *rawlist; |
1973 | struct str_node *ent; | |
0e60836b | 1974 | struct probe_trace_event tev; |
146a1439 | 1975 | int ret = 0; |
b498ce1f | 1976 | |
4235b045 | 1977 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 1978 | rawlist = get_probe_trace_command_rawlist(fd); |
e1d2017b | 1979 | sl = strlist__new(true, NULL); |
adf365f4 | 1980 | strlist__for_each(ent, rawlist) { |
0e60836b | 1981 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1982 | if (ret < 0) |
1983 | break; | |
fa28244d | 1984 | if (include_group) { |
146a1439 MH |
1985 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1986 | tev.event); | |
1987 | if (ret >= 0) | |
1988 | ret = strlist__add(sl, buf); | |
fa28244d | 1989 | } else |
146a1439 | 1990 | ret = strlist__add(sl, tev.event); |
0e60836b | 1991 | clear_probe_trace_event(&tev); |
146a1439 MH |
1992 | if (ret < 0) |
1993 | break; | |
b498ce1f | 1994 | } |
b498ce1f MH |
1995 | strlist__delete(rawlist); |
1996 | ||
146a1439 MH |
1997 | if (ret < 0) { |
1998 | strlist__delete(sl); | |
1999 | return NULL; | |
2000 | } | |
b498ce1f MH |
2001 | return sl; |
2002 | } | |
2003 | ||
0e60836b | 2004 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 2005 | { |
6eca8cc3 | 2006 | int ret = 0; |
0e60836b | 2007 | char *buf = synthesize_probe_trace_command(tev); |
50656eec | 2008 | |
146a1439 | 2009 | if (!buf) { |
0e60836b | 2010 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
2011 | return -EINVAL; |
2012 | } | |
2013 | ||
fa28244d | 2014 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
2015 | if (!probe_event_dry_run) { |
2016 | ret = write(fd, buf, strlen(buf)); | |
2017 | if (ret <= 0) | |
146a1439 MH |
2018 | pr_warning("Failed to write event: %s\n", |
2019 | strerror(errno)); | |
f4d7da49 | 2020 | } |
4235b045 | 2021 | free(buf); |
146a1439 | 2022 | return ret; |
50656eec MH |
2023 | } |
2024 | ||
146a1439 MH |
2025 | static int get_new_event_name(char *buf, size_t len, const char *base, |
2026 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
2027 | { |
2028 | int i, ret; | |
17f88fcd MH |
2029 | |
2030 | /* Try no suffix */ | |
2031 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
2032 | if (ret < 0) { |
2033 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
2034 | return ret; | |
2035 | } | |
17f88fcd | 2036 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 2037 | return 0; |
17f88fcd | 2038 | |
d761b08b MH |
2039 | if (!allow_suffix) { |
2040 | pr_warning("Error: event \"%s\" already exists. " | |
2041 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 2042 | return -EEXIST; |
d761b08b MH |
2043 | } |
2044 | ||
17f88fcd MH |
2045 | /* Try to add suffix */ |
2046 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 2047 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
2048 | if (ret < 0) { |
2049 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
2050 | return ret; | |
2051 | } | |
b498ce1f MH |
2052 | if (!strlist__has_entry(namelist, buf)) |
2053 | break; | |
2054 | } | |
146a1439 MH |
2055 | if (i == MAX_EVENT_INDEX) { |
2056 | pr_warning("Too many events are on the same function.\n"); | |
2057 | ret = -ERANGE; | |
2058 | } | |
2059 | ||
2060 | return ret; | |
b498ce1f MH |
2061 | } |
2062 | ||
0e60836b SD |
2063 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
2064 | struct probe_trace_event *tevs, | |
146a1439 | 2065 | int ntevs, bool allow_suffix) |
50656eec | 2066 | { |
146a1439 | 2067 | int i, fd, ret; |
0e60836b | 2068 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
2069 | char buf[64]; |
2070 | const char *event, *group; | |
b498ce1f | 2071 | struct strlist *namelist; |
50656eec | 2072 | |
225466f1 SD |
2073 | if (pev->uprobes) |
2074 | fd = open_uprobe_events(true); | |
2075 | else | |
2076 | fd = open_kprobe_events(true); | |
2077 | ||
146a1439 MH |
2078 | if (fd < 0) |
2079 | return fd; | |
b498ce1f | 2080 | /* Get current event names */ |
0e60836b | 2081 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
2082 | if (!namelist) { |
2083 | pr_debug("Failed to get current event list.\n"); | |
2084 | return -EIO; | |
2085 | } | |
4235b045 | 2086 | |
146a1439 | 2087 | ret = 0; |
a844d1ef | 2088 | printf("Added new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 2089 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
2090 | tev = &tevs[i]; |
2091 | if (pev->event) | |
2092 | event = pev->event; | |
2093 | else | |
2094 | if (pev->point.function) | |
2095 | event = pev->point.function; | |
2096 | else | |
2097 | event = tev->point.symbol; | |
2098 | if (pev->group) | |
2099 | group = pev->group; | |
2100 | else | |
2101 | group = PERFPROBE_GROUP; | |
2102 | ||
2103 | /* Get an unused new event name */ | |
146a1439 MH |
2104 | ret = get_new_event_name(buf, 64, event, |
2105 | namelist, allow_suffix); | |
2106 | if (ret < 0) | |
2107 | break; | |
4235b045 MH |
2108 | event = buf; |
2109 | ||
02b95dad MH |
2110 | tev->event = strdup(event); |
2111 | tev->group = strdup(group); | |
2112 | if (tev->event == NULL || tev->group == NULL) { | |
2113 | ret = -ENOMEM; | |
2114 | break; | |
2115 | } | |
0e60836b | 2116 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
2117 | if (ret < 0) |
2118 | break; | |
4235b045 MH |
2119 | /* Add added event name to namelist */ |
2120 | strlist__add(namelist, event); | |
2121 | ||
2122 | /* Trick here - save current event/group */ | |
2123 | event = pev->event; | |
2124 | group = pev->group; | |
2125 | pev->event = tev->event; | |
2126 | pev->group = tev->group; | |
fb226ccd | 2127 | show_perf_probe_event(pev, tev->point.module); |
4235b045 MH |
2128 | /* Trick here - restore current event/group */ |
2129 | pev->event = (char *)event; | |
2130 | pev->group = (char *)group; | |
2131 | ||
2132 | /* | |
2133 | * Probes after the first probe which comes from same | |
2134 | * user input are always allowed to add suffix, because | |
2135 | * there might be several addresses corresponding to | |
2136 | * one code line. | |
2137 | */ | |
2138 | allow_suffix = true; | |
50656eec | 2139 | } |
146a1439 MH |
2140 | |
2141 | if (ret >= 0) { | |
2142 | /* Show how to use the event. */ | |
a844d1ef | 2143 | printf("\nYou can now use it in all perf tools, such as:\n\n"); |
146a1439 MH |
2144 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, |
2145 | tev->event); | |
2146 | } | |
a9b495b0 | 2147 | |
e1d2017b | 2148 | strlist__delete(namelist); |
50656eec | 2149 | close(fd); |
146a1439 | 2150 | return ret; |
50656eec | 2151 | } |
fa28244d | 2152 | |
eb948e50 MH |
2153 | static char *looking_function_name; |
2154 | static int num_matched_functions; | |
2155 | ||
2156 | static int probe_function_filter(struct map *map __maybe_unused, | |
2157 | struct symbol *sym) | |
2158 | { | |
2159 | if ((sym->binding == STB_GLOBAL || sym->binding == STB_LOCAL) && | |
2160 | strcmp(looking_function_name, sym->name) == 0) { | |
2161 | num_matched_functions++; | |
2162 | return 0; | |
2163 | } | |
2164 | return 1; | |
2165 | } | |
2166 | ||
2167 | #define strdup_or_goto(str, label) \ | |
2168 | ({ char *__p = strdup(str); if (!__p) goto label; __p; }) | |
2169 | ||
2170 | /* | |
2171 | * Find probe function addresses from map. | |
2172 | * Return an error or the number of found probe_trace_event | |
2173 | */ | |
2174 | static int find_probe_trace_events_from_map(struct perf_probe_event *pev, | |
2175 | struct probe_trace_event **tevs, | |
2176 | int max_tevs, const char *target) | |
e0faa8d3 | 2177 | { |
eb948e50 MH |
2178 | struct map *map = NULL; |
2179 | struct kmap *kmap = NULL; | |
2180 | struct ref_reloc_sym *reloc_sym = NULL; | |
e0faa8d3 | 2181 | struct symbol *sym; |
eb948e50 | 2182 | struct rb_node *nd; |
0e60836b | 2183 | struct probe_trace_event *tev; |
eb948e50 MH |
2184 | struct perf_probe_point *pp = &pev->point; |
2185 | struct probe_trace_point *tp; | |
2186 | int ret, i; | |
4235b045 | 2187 | |
eb948e50 MH |
2188 | /* Init maps of given executable or kernel */ |
2189 | if (pev->uprobes) | |
2190 | map = dso__new_map(target); | |
2191 | else | |
2192 | map = kernel_get_module_map(target); | |
2193 | if (!map) { | |
2194 | ret = -EINVAL; | |
2195 | goto out; | |
fb7345bb MH |
2196 | } |
2197 | ||
eb948e50 MH |
2198 | /* |
2199 | * Load matched symbols: Since the different local symbols may have | |
2200 | * same name but different addresses, this lists all the symbols. | |
2201 | */ | |
2202 | num_matched_functions = 0; | |
2203 | looking_function_name = pp->function; | |
2204 | ret = map__load(map, probe_function_filter); | |
2205 | if (ret || num_matched_functions == 0) { | |
2206 | pr_err("Failed to find symbol %s in %s\n", pp->function, | |
2207 | target ? : "kernel"); | |
2208 | ret = -ENOENT; | |
2209 | goto out; | |
2210 | } else if (num_matched_functions > max_tevs) { | |
2211 | pr_err("Too many functions matched in %s\n", | |
2212 | target ? : "kernel"); | |
2213 | ret = -E2BIG; | |
2214 | goto out; | |
fb7345bb MH |
2215 | } |
2216 | ||
eb948e50 MH |
2217 | if (!pev->uprobes) { |
2218 | kmap = map__kmap(map); | |
2219 | reloc_sym = kmap->ref_reloc_sym; | |
2220 | if (!reloc_sym) { | |
2221 | pr_warning("Relocated base symbol is not found!\n"); | |
2222 | ret = -EINVAL; | |
2223 | goto out; | |
2224 | } | |
2225 | } | |
4235b045 | 2226 | |
eb948e50 MH |
2227 | /* Setup result trace-probe-events */ |
2228 | *tevs = zalloc(sizeof(*tev) * num_matched_functions); | |
2229 | if (!*tevs) { | |
02b95dad | 2230 | ret = -ENOMEM; |
eb948e50 | 2231 | goto out; |
02b95dad | 2232 | } |
ce27a443 | 2233 | |
eb948e50 MH |
2234 | ret = 0; |
2235 | map__for_each_symbol(map, sym, nd) { | |
2236 | tev = (*tevs) + ret; | |
2237 | tp = &tev->point; | |
2238 | if (ret == num_matched_functions) { | |
2239 | pr_warning("Too many symbols are listed. Skip it.\n"); | |
2240 | break; | |
ce27a443 | 2241 | } |
eb948e50 | 2242 | ret++; |
ce27a443 | 2243 | |
eb948e50 MH |
2244 | if (pp->offset > sym->end - sym->start) { |
2245 | pr_warning("Offset %ld is bigger than the size of %s\n", | |
2246 | pp->offset, sym->name); | |
2247 | ret = -ENOENT; | |
2248 | goto err_out; | |
2249 | } | |
2250 | /* Add one probe point */ | |
2251 | tp->address = map->unmap_ip(map, sym->start) + pp->offset; | |
2252 | if (reloc_sym) { | |
2253 | tp->symbol = strdup_or_goto(reloc_sym->name, nomem_out); | |
2254 | tp->offset = tp->address - reloc_sym->addr; | |
2255 | } else { | |
2256 | tp->symbol = strdup_or_goto(sym->name, nomem_out); | |
2257 | tp->offset = pp->offset; | |
2258 | } | |
2259 | tp->retprobe = pp->retprobe; | |
2260 | if (target) | |
2261 | tev->point.module = strdup_or_goto(target, nomem_out); | |
2262 | tev->uprobes = pev->uprobes; | |
2263 | tev->nargs = pev->nargs; | |
2264 | if (tev->nargs) { | |
2265 | tev->args = zalloc(sizeof(struct probe_trace_arg) * | |
2266 | tev->nargs); | |
2267 | if (tev->args == NULL) | |
2268 | goto nomem_out; | |
e334016f | 2269 | } |
48481938 | 2270 | for (i = 0; i < tev->nargs; i++) { |
eb948e50 MH |
2271 | if (pev->args[i].name) |
2272 | tev->args[i].name = | |
2273 | strdup_or_goto(pev->args[i].name, | |
2274 | nomem_out); | |
2275 | ||
2276 | tev->args[i].value = strdup_or_goto(pev->args[i].var, | |
2277 | nomem_out); | |
2278 | if (pev->args[i].type) | |
2279 | tev->args[i].type = | |
2280 | strdup_or_goto(pev->args[i].type, | |
2281 | nomem_out); | |
48481938 | 2282 | } |
4235b045 MH |
2283 | } |
2284 | ||
eb948e50 MH |
2285 | out: |
2286 | if (map && pev->uprobes) { | |
2287 | /* Only when using uprobe(exec) map needs to be released */ | |
2288 | dso__delete(map->dso); | |
2289 | map__delete(map); | |
2290 | } | |
2291 | return ret; | |
225466f1 | 2292 | |
eb948e50 MH |
2293 | nomem_out: |
2294 | ret = -ENOMEM; | |
2295 | err_out: | |
2296 | clear_probe_trace_events(*tevs, num_matched_functions); | |
2297 | zfree(tevs); | |
2298 | goto out; | |
2299 | } | |
1c1bc922 | 2300 | |
eb948e50 MH |
2301 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
2302 | struct probe_trace_event **tevs, | |
2303 | int max_tevs, const char *target) | |
2304 | { | |
2305 | int ret; | |
2306 | ||
2307 | if (pev->uprobes && !pev->group) { | |
2308 | /* Replace group name if not given */ | |
2309 | ret = convert_exec_to_group(target, &pev->group); | |
2310 | if (ret != 0) { | |
2311 | pr_warning("Failed to make a group name.\n"); | |
2312 | return ret; | |
2313 | } | |
02b95dad | 2314 | } |
e334016f | 2315 | |
eb948e50 MH |
2316 | /* Convert perf_probe_event with debuginfo */ |
2317 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, target); | |
2318 | if (ret != 0) | |
2319 | return ret; /* Found in debuginfo or got an error */ | |
2320 | ||
2321 | return find_probe_trace_events_from_map(pev, tevs, max_tevs, target); | |
4235b045 MH |
2322 | } |
2323 | ||
2324 | struct __event_package { | |
2325 | struct perf_probe_event *pev; | |
0e60836b | 2326 | struct probe_trace_event *tevs; |
4235b045 MH |
2327 | int ntevs; |
2328 | }; | |
2329 | ||
146a1439 | 2330 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
4eced234 | 2331 | int max_tevs, const char *target, bool force_add) |
4235b045 | 2332 | { |
146a1439 | 2333 | int i, j, ret; |
4235b045 MH |
2334 | struct __event_package *pkgs; |
2335 | ||
225466f1 | 2336 | ret = 0; |
e334016f | 2337 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
225466f1 | 2338 | |
e334016f MH |
2339 | if (pkgs == NULL) |
2340 | return -ENOMEM; | |
4235b045 | 2341 | |
ee45b6c2 | 2342 | ret = init_symbol_maps(pevs->uprobes); |
449e5b24 MH |
2343 | if (ret < 0) { |
2344 | free(pkgs); | |
146a1439 | 2345 | return ret; |
449e5b24 | 2346 | } |
4235b045 MH |
2347 | |
2348 | /* Loop 1: convert all events */ | |
2349 | for (i = 0; i < npevs; i++) { | |
2350 | pkgs[i].pev = &pevs[i]; | |
2351 | /* Convert with or without debuginfo */ | |
0e60836b | 2352 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
2353 | &pkgs[i].tevs, |
2354 | max_tevs, | |
4eced234 | 2355 | target); |
146a1439 MH |
2356 | if (ret < 0) |
2357 | goto end; | |
2358 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
2359 | } |
2360 | ||
4235b045 | 2361 | /* Loop 2: add all events */ |
8635bf6e | 2362 | for (i = 0; i < npevs; i++) { |
0e60836b | 2363 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 | 2364 | pkgs[i].ntevs, force_add); |
fbee632d ACM |
2365 | if (ret < 0) |
2366 | break; | |
2367 | } | |
146a1439 | 2368 | end: |
449e5b24 MH |
2369 | /* Loop 3: cleanup and free trace events */ |
2370 | for (i = 0; i < npevs; i++) { | |
146a1439 | 2371 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 2372 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
74cf249d | 2373 | zfree(&pkgs[i].tevs); |
449e5b24 MH |
2374 | } |
2375 | free(pkgs); | |
ee45b6c2 | 2376 | exit_symbol_maps(); |
146a1439 MH |
2377 | |
2378 | return ret; | |
e0faa8d3 MH |
2379 | } |
2380 | ||
0e60836b | 2381 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
2382 | { |
2383 | char *p; | |
2384 | char buf[128]; | |
4235b045 | 2385 | int ret; |
bbbb521b | 2386 | |
0e60836b | 2387 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
2388 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
2389 | if (ret < 0) | |
2390 | goto error; | |
2391 | ||
bbbb521b | 2392 | p = strchr(buf + 2, ':'); |
146a1439 MH |
2393 | if (!p) { |
2394 | pr_debug("Internal error: %s should have ':' but not.\n", | |
2395 | ent->s); | |
2396 | ret = -ENOTSUP; | |
2397 | goto error; | |
2398 | } | |
bbbb521b MH |
2399 | *p = '/'; |
2400 | ||
4235b045 MH |
2401 | pr_debug("Writing event: %s\n", buf); |
2402 | ret = write(fd, buf, strlen(buf)); | |
44a56040 MH |
2403 | if (ret < 0) { |
2404 | ret = -errno; | |
146a1439 | 2405 | goto error; |
44a56040 | 2406 | } |
146a1439 | 2407 | |
a844d1ef | 2408 | printf("Removed event: %s\n", ent->s); |
146a1439 MH |
2409 | return 0; |
2410 | error: | |
2411 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
2412 | return ret; | |
bbbb521b MH |
2413 | } |
2414 | ||
225466f1 SD |
2415 | static int del_trace_probe_event(int fd, const char *buf, |
2416 | struct strlist *namelist) | |
fa28244d | 2417 | { |
bbbb521b | 2418 | struct str_node *ent, *n; |
225466f1 | 2419 | int ret = -1; |
fa28244d | 2420 | |
bbbb521b MH |
2421 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
2422 | strlist__for_each_safe(ent, n, namelist) | |
2423 | if (strglobmatch(ent->s, buf)) { | |
0e60836b | 2424 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
2425 | if (ret < 0) |
2426 | break; | |
bbbb521b MH |
2427 | strlist__remove(namelist, ent); |
2428 | } | |
2429 | } else { | |
2430 | ent = strlist__find(namelist, buf); | |
2431 | if (ent) { | |
0e60836b | 2432 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
2433 | if (ret >= 0) |
2434 | strlist__remove(namelist, ent); | |
bbbb521b MH |
2435 | } |
2436 | } | |
146a1439 MH |
2437 | |
2438 | return ret; | |
fa28244d MH |
2439 | } |
2440 | ||
146a1439 | 2441 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 2442 | { |
225466f1 SD |
2443 | int ret = -1, ufd = -1, kfd = -1; |
2444 | char buf[128]; | |
fa28244d MH |
2445 | const char *group, *event; |
2446 | char *p, *str; | |
2447 | struct str_node *ent; | |
225466f1 | 2448 | struct strlist *namelist = NULL, *unamelist = NULL; |
146a1439 | 2449 | |
fa28244d | 2450 | /* Get current event names */ |
225466f1 SD |
2451 | kfd = open_kprobe_events(true); |
2452 | if (kfd < 0) | |
2453 | return kfd; | |
2454 | ||
2455 | namelist = get_probe_trace_event_names(kfd, true); | |
2456 | ufd = open_uprobe_events(true); | |
2457 | ||
2458 | if (ufd >= 0) | |
2459 | unamelist = get_probe_trace_event_names(ufd, true); | |
2460 | ||
2461 | if (namelist == NULL && unamelist == NULL) | |
2462 | goto error; | |
fa28244d | 2463 | |
adf365f4 | 2464 | strlist__for_each(ent, dellist) { |
02b95dad MH |
2465 | str = strdup(ent->s); |
2466 | if (str == NULL) { | |
2467 | ret = -ENOMEM; | |
225466f1 | 2468 | goto error; |
02b95dad | 2469 | } |
bbbb521b | 2470 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
2471 | p = strchr(str, ':'); |
2472 | if (p) { | |
2473 | group = str; | |
2474 | *p = '\0'; | |
2475 | event = p + 1; | |
2476 | } else { | |
bbbb521b | 2477 | group = "*"; |
fa28244d MH |
2478 | event = str; |
2479 | } | |
225466f1 SD |
2480 | |
2481 | ret = e_snprintf(buf, 128, "%s:%s", group, event); | |
2482 | if (ret < 0) { | |
2483 | pr_err("Failed to copy event."); | |
2484 | free(str); | |
2485 | goto error; | |
2486 | } | |
2487 | ||
bbbb521b | 2488 | pr_debug("Group: %s, Event: %s\n", group, event); |
225466f1 SD |
2489 | |
2490 | if (namelist) | |
2491 | ret = del_trace_probe_event(kfd, buf, namelist); | |
2492 | ||
2493 | if (unamelist && ret != 0) | |
2494 | ret = del_trace_probe_event(ufd, buf, unamelist); | |
2495 | ||
2496 | if (ret != 0) | |
2497 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
2498 | ||
fa28244d MH |
2499 | free(str); |
2500 | } | |
225466f1 SD |
2501 | |
2502 | error: | |
2503 | if (kfd >= 0) { | |
a23c4dc4 | 2504 | strlist__delete(namelist); |
225466f1 SD |
2505 | close(kfd); |
2506 | } | |
2507 | ||
2508 | if (ufd >= 0) { | |
a23c4dc4 | 2509 | strlist__delete(unamelist); |
225466f1 SD |
2510 | close(ufd); |
2511 | } | |
146a1439 MH |
2512 | |
2513 | return ret; | |
fa28244d | 2514 | } |
225466f1 | 2515 | |
3c42258c MH |
2516 | /* TODO: don't use a global variable for filter ... */ |
2517 | static struct strfilter *available_func_filter; | |
fa28244d | 2518 | |
e80711ca | 2519 | /* |
3c42258c MH |
2520 | * If a symbol corresponds to a function with global binding and |
2521 | * matches filter return 0. For all others return 1. | |
e80711ca | 2522 | */ |
1d037ca1 | 2523 | static int filter_available_functions(struct map *map __maybe_unused, |
3c42258c | 2524 | struct symbol *sym) |
e80711ca | 2525 | { |
eb948e50 | 2526 | if ((sym->binding == STB_GLOBAL || sym->binding == STB_LOCAL) && |
3c42258c MH |
2527 | strfilter__compare(available_func_filter, sym->name)) |
2528 | return 0; | |
2529 | return 1; | |
e80711ca MH |
2530 | } |
2531 | ||
2df58634 MH |
2532 | int show_available_funcs(const char *target, struct strfilter *_filter, |
2533 | bool user) | |
e80711ca MH |
2534 | { |
2535 | struct map *map; | |
2536 | int ret; | |
2537 | ||
2df58634 | 2538 | ret = init_symbol_maps(user); |
e80711ca MH |
2539 | if (ret < 0) |
2540 | return ret; | |
2541 | ||
2df58634 MH |
2542 | /* Get a symbol map */ |
2543 | if (user) | |
2544 | map = dso__new_map(target); | |
2545 | else | |
2546 | map = kernel_get_module_map(target); | |
e80711ca | 2547 | if (!map) { |
2df58634 | 2548 | pr_err("Failed to get a map for %s\n", (target) ? : "kernel"); |
e80711ca MH |
2549 | return -EINVAL; |
2550 | } | |
225466f1 | 2551 | |
2df58634 | 2552 | /* Load symbols with given filter */ |
3c42258c | 2553 | available_func_filter = _filter; |
2df58634 MH |
2554 | if (map__load(map, filter_available_functions)) { |
2555 | pr_err("Failed to load symbols in %s\n", (target) ? : "kernel"); | |
2556 | goto end; | |
2557 | } | |
2558 | if (!dso__sorted_by_name(map->dso, map->type)) | |
2559 | dso__sort_by_name(map->dso, map->type); | |
225466f1 | 2560 | |
2df58634 MH |
2561 | /* Show all (filtered) symbols */ |
2562 | setup_pager(); | |
2563 | dso__fprintf_symbols_by_name(map->dso, map->type, stdout); | |
2564 | end: | |
2565 | if (user) { | |
2566 | dso__delete(map->dso); | |
2567 | map__delete(map); | |
2568 | } | |
2569 | exit_symbol_maps(); | |
225466f1 | 2570 | |
2df58634 | 2571 | return ret; |
225466f1 SD |
2572 | } |
2573 |