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