Commit | Line | Data |
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50656eec MH |
1 | /* |
2 | * probe-event.c : perf-probe definition to kprobe_events format converter | |
3 | * | |
4 | * Written by Masami Hiramatsu <mhiramat@redhat.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | * | |
20 | */ | |
21 | ||
22 | #define _GNU_SOURCE | |
23 | #include <sys/utsname.h> | |
24 | #include <sys/types.h> | |
25 | #include <sys/stat.h> | |
26 | #include <fcntl.h> | |
27 | #include <errno.h> | |
28 | #include <stdio.h> | |
29 | #include <unistd.h> | |
30 | #include <stdlib.h> | |
31 | #include <string.h> | |
4de189fe MH |
32 | #include <stdarg.h> |
33 | #include <limits.h> | |
50656eec MH |
34 | |
35 | #undef _GNU_SOURCE | |
31facc5f | 36 | #include "util.h" |
50656eec | 37 | #include "event.h" |
e1c01d61 | 38 | #include "string.h" |
4de189fe | 39 | #include "strlist.h" |
50656eec | 40 | #include "debug.h" |
72041334 | 41 | #include "cache.h" |
631c9def | 42 | #include "color.h" |
e0faa8d3 MH |
43 | #include "symbol.h" |
44 | #include "thread.h" | |
50656eec MH |
45 | #include "parse-events.h" /* For debugfs_path */ |
46 | #include "probe-event.h" | |
4235b045 | 47 | #include "probe-finder.h" |
50656eec MH |
48 | |
49 | #define MAX_CMDLEN 256 | |
50 | #define MAX_PROBE_ARGS 128 | |
51 | #define PERFPROBE_GROUP "probe" | |
52 | ||
f4d7da49 MH |
53 | bool probe_event_dry_run; /* Dry run flag */ |
54 | ||
50656eec MH |
55 | #define semantic_error(msg ...) die("Semantic error :" msg) |
56 | ||
4de189fe | 57 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
58 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
59 | __attribute__((format(printf, 3, 4))); | |
60 | ||
4de189fe MH |
61 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
62 | { | |
63 | int ret; | |
64 | va_list ap; | |
65 | va_start(ap, format); | |
66 | ret = vsnprintf(str, size, format, ap); | |
67 | va_end(ap); | |
68 | if (ret >= (int)size) | |
69 | ret = -E2BIG; | |
70 | return ret; | |
71 | } | |
72 | ||
e0faa8d3 MH |
73 | static struct map_groups kmap_groups; |
74 | static struct map *kmaps[MAP__NR_TYPES]; | |
75 | ||
76 | /* Initialize symbol maps for vmlinux */ | |
77 | static void init_vmlinux(void) | |
78 | { | |
79 | symbol_conf.sort_by_name = true; | |
80 | if (symbol_conf.vmlinux_name == NULL) | |
81 | symbol_conf.try_vmlinux_path = true; | |
82 | else | |
83 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
84 | if (symbol__init() < 0) | |
85 | die("Failed to init symbol map."); | |
86 | ||
87 | map_groups__init(&kmap_groups); | |
88 | if (map_groups__create_kernel_maps(&kmap_groups, kmaps) < 0) | |
89 | die("Failed to create kernel maps."); | |
90 | } | |
91 | ||
92 | #ifndef NO_DWARF_SUPPORT | |
93 | static int open_vmlinux(void) | |
94 | { | |
95 | if (map__load(kmaps[MAP__FUNCTION], NULL) < 0) { | |
96 | pr_debug("Failed to load kernel map.\n"); | |
97 | return -EINVAL; | |
98 | } | |
99 | pr_debug("Try to open %s\n", kmaps[MAP__FUNCTION]->dso->long_name); | |
100 | return open(kmaps[MAP__FUNCTION]->dso->long_name, O_RDONLY); | |
101 | } | |
102 | #endif | |
103 | ||
631c9def MH |
104 | void parse_line_range_desc(const char *arg, struct line_range *lr) |
105 | { | |
106 | const char *ptr; | |
107 | char *tmp; | |
108 | /* | |
109 | * <Syntax> | |
110 | * SRC:SLN[+NUM|-ELN] | |
111 | * FUNC[:SLN[+NUM|-ELN]] | |
112 | */ | |
113 | ptr = strchr(arg, ':'); | |
114 | if (ptr) { | |
115 | lr->start = (unsigned int)strtoul(ptr + 1, &tmp, 0); | |
116 | if (*tmp == '+') | |
117 | lr->end = lr->start + (unsigned int)strtoul(tmp + 1, | |
118 | &tmp, 0); | |
119 | else if (*tmp == '-') | |
120 | lr->end = (unsigned int)strtoul(tmp + 1, &tmp, 0); | |
121 | else | |
122 | lr->end = 0; | |
123 | pr_debug("Line range is %u to %u\n", lr->start, lr->end); | |
124 | if (lr->end && lr->start > lr->end) | |
125 | semantic_error("Start line must be smaller" | |
126 | " than end line."); | |
127 | if (*tmp != '\0') | |
128 | semantic_error("Tailing with invalid character '%d'.", | |
129 | *tmp); | |
31facc5f | 130 | tmp = xstrndup(arg, (ptr - arg)); |
631c9def | 131 | } else |
31facc5f | 132 | tmp = xstrdup(arg); |
631c9def MH |
133 | |
134 | if (strchr(tmp, '.')) | |
135 | lr->file = tmp; | |
136 | else | |
137 | lr->function = tmp; | |
138 | } | |
139 | ||
b7702a21 MH |
140 | /* Check the name is good for event/group */ |
141 | static bool check_event_name(const char *name) | |
142 | { | |
143 | if (!isalpha(*name) && *name != '_') | |
144 | return false; | |
145 | while (*++name != '\0') { | |
146 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
147 | return false; | |
148 | } | |
149 | return true; | |
150 | } | |
151 | ||
50656eec | 152 | /* Parse probepoint definition. */ |
4235b045 | 153 | static void parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 154 | { |
4235b045 | 155 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
156 | char *ptr, *tmp; |
157 | char c, nc = 0; | |
158 | /* | |
159 | * <Syntax> | |
2a9c8c36 MH |
160 | * perf probe [EVENT=]SRC[:LN|;PTN] |
161 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
162 | * |
163 | * TODO:Group name support | |
50656eec MH |
164 | */ |
165 | ||
2a9c8c36 MH |
166 | ptr = strpbrk(arg, ";=@+%"); |
167 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
168 | *ptr = '\0'; |
169 | tmp = ptr + 1; | |
170 | ptr = strchr(arg, ':'); | |
171 | if (ptr) /* Group name is not supported yet. */ | |
172 | semantic_error("Group name is not supported yet."); | |
b7702a21 MH |
173 | if (!check_event_name(arg)) |
174 | semantic_error("%s is bad for event name -it must " | |
175 | "follow C symbol-naming rule.", arg); | |
4235b045 MH |
176 | pev->event = xstrdup(arg); |
177 | pev->group = NULL; | |
af663d75 MH |
178 | arg = tmp; |
179 | } | |
180 | ||
2a9c8c36 | 181 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
182 | if (ptr) { |
183 | nc = *ptr; | |
184 | *ptr++ = '\0'; | |
185 | } | |
186 | ||
187 | /* Check arg is function or file and copy it */ | |
188 | if (strchr(arg, '.')) /* File */ | |
31facc5f | 189 | pp->file = xstrdup(arg); |
50656eec | 190 | else /* Function */ |
31facc5f | 191 | pp->function = xstrdup(arg); |
50656eec MH |
192 | |
193 | /* Parse other options */ | |
194 | while (ptr) { | |
195 | arg = ptr; | |
196 | c = nc; | |
2a9c8c36 | 197 | if (c == ';') { /* Lazy pattern must be the last part */ |
31facc5f | 198 | pp->lazy_line = xstrdup(arg); |
2a9c8c36 MH |
199 | break; |
200 | } | |
201 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
202 | if (ptr) { |
203 | nc = *ptr; | |
204 | *ptr++ = '\0'; | |
205 | } | |
206 | switch (c) { | |
207 | case ':': /* Line number */ | |
208 | pp->line = strtoul(arg, &tmp, 0); | |
209 | if (*tmp != '\0') | |
2a9c8c36 MH |
210 | semantic_error("There is non-digit char" |
211 | " in line number."); | |
50656eec MH |
212 | break; |
213 | case '+': /* Byte offset from a symbol */ | |
214 | pp->offset = strtoul(arg, &tmp, 0); | |
215 | if (*tmp != '\0') | |
2a9c8c36 | 216 | semantic_error("There is non-digit character" |
50656eec MH |
217 | " in offset."); |
218 | break; | |
219 | case '@': /* File name */ | |
220 | if (pp->file) | |
221 | semantic_error("SRC@SRC is not allowed."); | |
31facc5f | 222 | pp->file = xstrdup(arg); |
50656eec MH |
223 | break; |
224 | case '%': /* Probe places */ | |
225 | if (strcmp(arg, "return") == 0) { | |
226 | pp->retprobe = 1; | |
227 | } else /* Others not supported yet */ | |
228 | semantic_error("%%%s is not supported.", arg); | |
229 | break; | |
230 | default: | |
231 | DIE_IF("Program has a bug."); | |
232 | break; | |
233 | } | |
234 | } | |
235 | ||
236 | /* Exclusion check */ | |
2a9c8c36 MH |
237 | if (pp->lazy_line && pp->line) |
238 | semantic_error("Lazy pattern can't be used with line number."); | |
239 | ||
240 | if (pp->lazy_line && pp->offset) | |
241 | semantic_error("Lazy pattern can't be used with offset."); | |
242 | ||
50656eec MH |
243 | if (pp->line && pp->offset) |
244 | semantic_error("Offset can't be used with line number."); | |
245 | ||
2a9c8c36 MH |
246 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) |
247 | semantic_error("File always requires line number or " | |
248 | "lazy pattern."); | |
50656eec MH |
249 | |
250 | if (pp->offset && !pp->function) | |
251 | semantic_error("Offset requires an entry function."); | |
252 | ||
253 | if (pp->retprobe && !pp->function) | |
254 | semantic_error("Return probe requires an entry function."); | |
255 | ||
2a9c8c36 MH |
256 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) |
257 | semantic_error("Offset/Line/Lazy pattern can't be used with " | |
258 | "return probe."); | |
50656eec | 259 | |
4235b045 | 260 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
261 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
262 | pp->lazy_line); | |
50656eec MH |
263 | } |
264 | ||
4235b045 MH |
265 | /* Parse perf-probe event command */ |
266 | void parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) | |
50656eec | 267 | { |
e1c01d61 | 268 | char **argv; |
fac13fd5 MH |
269 | int argc, i; |
270 | ||
4235b045 | 271 | argv = argv_split(cmd, &argc); |
e1c01d61 MH |
272 | if (!argv) |
273 | die("argv_split failed."); | |
274 | if (argc > MAX_PROBE_ARGS + 1) | |
275 | semantic_error("Too many arguments"); | |
50656eec MH |
276 | |
277 | /* Parse probe point */ | |
4235b045 | 278 | parse_perf_probe_point(argv[0], pev); |
50656eec | 279 | |
e1c01d61 | 280 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 MH |
281 | pev->nargs = argc - 1; |
282 | pev->args = xzalloc(sizeof(struct perf_probe_arg) * pev->nargs); | |
283 | for (i = 0; i < pev->nargs; i++) { | |
284 | pev->args[i].name = xstrdup(argv[i + 1]); | |
285 | if (is_c_varname(pev->args[i].name) && pev->point.retprobe) | |
286 | semantic_error("You can't specify local variable for" | |
287 | " kretprobe"); | |
e1c01d61 | 288 | } |
50656eec | 289 | |
e1c01d61 | 290 | argv_free(argv); |
50656eec MH |
291 | } |
292 | ||
4235b045 MH |
293 | /* Return true if this perf_probe_event requires debuginfo */ |
294 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
295 | { | |
296 | int i; | |
297 | ||
298 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
299 | return true; | |
300 | ||
301 | for (i = 0; i < pev->nargs; i++) | |
302 | if (is_c_varname(pev->args[i].name)) | |
303 | return true; | |
304 | ||
305 | return false; | |
306 | } | |
307 | ||
4de189fe | 308 | /* Parse kprobe_events event into struct probe_point */ |
4235b045 | 309 | void parse_kprobe_trace_command(const char *cmd, struct kprobe_trace_event *tev) |
4de189fe | 310 | { |
4235b045 | 311 | struct kprobe_trace_point *tp = &tev->point; |
4de189fe MH |
312 | char pr; |
313 | char *p; | |
314 | int ret, i, argc; | |
315 | char **argv; | |
316 | ||
4235b045 MH |
317 | pr_debug("Parsing kprobe_events: %s\n", cmd); |
318 | argv = argv_split(cmd, &argc); | |
4de189fe MH |
319 | if (!argv) |
320 | die("argv_split failed."); | |
321 | if (argc < 2) | |
322 | semantic_error("Too less arguments."); | |
323 | ||
324 | /* Scan event and group name. */ | |
93aaa45a | 325 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
326 | &pr, (float *)(void *)&tev->group, |
327 | (float *)(void *)&tev->event); | |
4de189fe MH |
328 | if (ret != 3) |
329 | semantic_error("Failed to parse event name: %s", argv[0]); | |
4235b045 | 330 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 331 | |
4235b045 | 332 | tp->retprobe = (pr == 'r'); |
4de189fe MH |
333 | |
334 | /* Scan function name and offset */ | |
4235b045 MH |
335 | ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol, |
336 | &tp->offset); | |
4de189fe | 337 | if (ret == 1) |
4235b045 | 338 | tp->offset = 0; |
4de189fe | 339 | |
4235b045 MH |
340 | tev->nargs = argc - 2; |
341 | tev->args = xzalloc(sizeof(struct kprobe_trace_arg) * tev->nargs); | |
342 | for (i = 0; i < tev->nargs; i++) { | |
4de189fe MH |
343 | p = strchr(argv[i + 2], '='); |
344 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
345 | *p++ = '\0'; |
346 | else | |
347 | p = argv[i + 2]; | |
348 | tev->args[i].name = xstrdup(argv[i + 2]); | |
349 | /* TODO: parse regs and offset */ | |
350 | tev->args[i].value = xstrdup(p); | |
4de189fe MH |
351 | } |
352 | ||
4de189fe MH |
353 | argv_free(argv); |
354 | } | |
355 | ||
4235b045 MH |
356 | /* Compose only probe point (not argument) */ |
357 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 358 | { |
fb1587d8 MH |
359 | char *buf, *tmp; |
360 | char offs[32] = "", line[32] = "", file[32] = ""; | |
361 | int ret, len; | |
4de189fe | 362 | |
4235b045 | 363 | buf = xzalloc(MAX_CMDLEN); |
4de189fe | 364 | if (pp->offset) { |
fb1587d8 | 365 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
366 | if (ret <= 0) |
367 | goto error; | |
368 | } | |
369 | if (pp->line) { | |
fb1587d8 MH |
370 | ret = e_snprintf(line, 32, ":%d", pp->line); |
371 | if (ret <= 0) | |
372 | goto error; | |
373 | } | |
374 | if (pp->file) { | |
375 | len = strlen(pp->file) - 32; | |
376 | if (len < 0) | |
377 | len = 0; | |
378 | tmp = strchr(pp->file + len, '/'); | |
379 | if (!tmp) | |
380 | tmp = pp->file + len - 1; | |
381 | ret = e_snprintf(file, 32, "@%s", tmp + 1); | |
4de189fe MH |
382 | if (ret <= 0) |
383 | goto error; | |
384 | } | |
385 | ||
386 | if (pp->function) | |
fb1587d8 MH |
387 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
388 | offs, pp->retprobe ? "%return" : "", line, | |
389 | file); | |
4de189fe | 390 | else |
fb1587d8 | 391 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
392 | if (ret <= 0) |
393 | goto error; | |
394 | ||
395 | return buf; | |
7ef17aaf | 396 | error: |
4235b045 | 397 | die("Failed to synthesize perf probe point: %s", strerror(-ret)); |
7ef17aaf MH |
398 | } |
399 | ||
4235b045 MH |
400 | #if 0 |
401 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
402 | { |
403 | char *buf; | |
404 | int i, len, ret; | |
405 | ||
4235b045 MH |
406 | buf = synthesize_perf_probe_point(&pev->point); |
407 | if (!buf) | |
408 | return NULL; | |
4de189fe | 409 | |
4235b045 MH |
410 | len = strlen(buf); |
411 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 412 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
413 | pev->args[i].name); |
414 | if (ret <= 0) { | |
415 | free(buf); | |
416 | return NULL; | |
417 | } | |
4de189fe MH |
418 | len += ret; |
419 | } | |
4de189fe | 420 | |
4235b045 MH |
421 | return buf; |
422 | } | |
423 | #endif | |
424 | ||
425 | static int __synthesize_kprobe_trace_arg_ref(struct kprobe_trace_arg_ref *ref, | |
426 | char **buf, size_t *buflen, | |
427 | int depth) | |
428 | { | |
429 | int ret; | |
430 | if (ref->next) { | |
431 | depth = __synthesize_kprobe_trace_arg_ref(ref->next, buf, | |
432 | buflen, depth + 1); | |
433 | if (depth < 0) | |
434 | goto out; | |
435 | } | |
436 | ||
437 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
438 | if (ret < 0) | |
439 | depth = ret; | |
440 | else { | |
441 | *buf += ret; | |
442 | *buflen -= ret; | |
443 | } | |
444 | out: | |
445 | return depth; | |
4de189fe | 446 | |
4de189fe MH |
447 | } |
448 | ||
4235b045 MH |
449 | static int synthesize_kprobe_trace_arg(struct kprobe_trace_arg *arg, |
450 | char *buf, size_t buflen) | |
50656eec | 451 | { |
4235b045 MH |
452 | int ret, depth = 0; |
453 | char *tmp = buf; | |
454 | ||
455 | /* Argument name or separator */ | |
456 | if (arg->name) | |
457 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
458 | else | |
459 | ret = e_snprintf(buf, buflen, " "); | |
460 | if (ret < 0) | |
461 | return ret; | |
462 | buf += ret; | |
463 | buflen -= ret; | |
464 | ||
465 | /* Dereferencing arguments */ | |
466 | if (arg->ref) { | |
467 | depth = __synthesize_kprobe_trace_arg_ref(arg->ref, &buf, | |
468 | &buflen, 1); | |
469 | if (depth < 0) | |
470 | return depth; | |
471 | } | |
472 | ||
473 | /* Print argument value */ | |
474 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
475 | if (ret < 0) | |
476 | return ret; | |
477 | buf += ret; | |
478 | buflen -= ret; | |
479 | ||
480 | /* Closing */ | |
481 | while (depth--) { | |
482 | ret = e_snprintf(buf, buflen, ")"); | |
483 | if (ret < 0) | |
484 | return ret; | |
485 | buf += ret; | |
486 | buflen -= ret; | |
487 | } | |
488 | ||
489 | return buf - tmp; | |
490 | } | |
491 | ||
492 | char *synthesize_kprobe_trace_command(struct kprobe_trace_event *tev) | |
493 | { | |
494 | struct kprobe_trace_point *tp = &tev->point; | |
50656eec MH |
495 | char *buf; |
496 | int i, len, ret; | |
497 | ||
4235b045 MH |
498 | buf = xzalloc(MAX_CMDLEN); |
499 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu", | |
500 | tp->retprobe ? 'r' : 'p', | |
501 | tev->group, tev->event, | |
502 | tp->symbol, tp->offset); | |
503 | if (len <= 0) | |
50656eec | 504 | goto error; |
50656eec | 505 | |
4235b045 MH |
506 | for (i = 0; i < tev->nargs; i++) { |
507 | ret = synthesize_kprobe_trace_arg(&tev->args[i], buf + len, | |
508 | MAX_CMDLEN - len); | |
4de189fe | 509 | if (ret <= 0) |
50656eec MH |
510 | goto error; |
511 | len += ret; | |
512 | } | |
50656eec | 513 | |
4235b045 | 514 | return buf; |
50656eec | 515 | error: |
4235b045 MH |
516 | free(buf); |
517 | return NULL; | |
518 | } | |
50656eec | 519 | |
4235b045 MH |
520 | void convert_to_perf_probe_event(struct kprobe_trace_event *tev, |
521 | struct perf_probe_event *pev) | |
522 | { | |
523 | char buf[64]; | |
524 | int i; | |
fb1587d8 MH |
525 | #ifndef NO_DWARF_SUPPORT |
526 | struct symbol *sym; | |
527 | int fd, ret = 0; | |
528 | ||
529 | sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION], | |
530 | tev->point.symbol, NULL); | |
531 | if (sym) { | |
532 | fd = open_vmlinux(); | |
533 | ret = find_perf_probe_point(fd, sym->start + tev->point.offset, | |
534 | &pev->point); | |
535 | close(fd); | |
536 | } | |
537 | if (ret <= 0) { | |
538 | pev->point.function = xstrdup(tev->point.symbol); | |
539 | pev->point.offset = tev->point.offset; | |
540 | } | |
541 | #else | |
4235b045 MH |
542 | /* Convert trace_point to probe_point */ |
543 | pev->point.function = xstrdup(tev->point.symbol); | |
544 | pev->point.offset = tev->point.offset; | |
fb1587d8 | 545 | #endif |
4235b045 MH |
546 | pev->point.retprobe = tev->point.retprobe; |
547 | ||
fb1587d8 MH |
548 | pev->event = xstrdup(tev->event); |
549 | pev->group = xstrdup(tev->group); | |
550 | ||
4235b045 MH |
551 | /* Convert trace_arg to probe_arg */ |
552 | pev->nargs = tev->nargs; | |
553 | pev->args = xzalloc(sizeof(struct perf_probe_arg) * pev->nargs); | |
554 | for (i = 0; i < tev->nargs; i++) | |
555 | if (tev->args[i].name) | |
556 | pev->args[i].name = xstrdup(tev->args[i].name); | |
557 | else { | |
558 | synthesize_kprobe_trace_arg(&tev->args[i], buf, 64); | |
559 | pev->args[i].name = xstrdup(buf); | |
560 | } | |
561 | } | |
562 | ||
563 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
564 | { | |
565 | struct perf_probe_point *pp = &pev->point; | |
566 | int i; | |
567 | ||
568 | if (pev->event) | |
569 | free(pev->event); | |
570 | if (pev->group) | |
571 | free(pev->group); | |
572 | if (pp->file) | |
573 | free(pp->file); | |
574 | if (pp->function) | |
575 | free(pp->function); | |
576 | if (pp->lazy_line) | |
577 | free(pp->lazy_line); | |
578 | for (i = 0; i < pev->nargs; i++) | |
579 | if (pev->args[i].name) | |
580 | free(pev->args[i].name); | |
581 | if (pev->args) | |
582 | free(pev->args); | |
583 | memset(pev, 0, sizeof(*pev)); | |
584 | } | |
585 | ||
586 | void clear_kprobe_trace_event(struct kprobe_trace_event *tev) | |
587 | { | |
588 | struct kprobe_trace_arg_ref *ref, *next; | |
589 | int i; | |
590 | ||
591 | if (tev->event) | |
592 | free(tev->event); | |
593 | if (tev->group) | |
594 | free(tev->group); | |
595 | if (tev->point.symbol) | |
596 | free(tev->point.symbol); | |
597 | for (i = 0; i < tev->nargs; i++) { | |
598 | if (tev->args[i].name) | |
599 | free(tev->args[i].name); | |
600 | if (tev->args[i].value) | |
601 | free(tev->args[i].value); | |
602 | ref = tev->args[i].ref; | |
603 | while (ref) { | |
604 | next = ref->next; | |
605 | free(ref); | |
606 | ref = next; | |
607 | } | |
608 | } | |
609 | if (tev->args) | |
610 | free(tev->args); | |
611 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
612 | } |
613 | ||
f4d7da49 | 614 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
615 | { |
616 | char buf[PATH_MAX]; | |
617 | int ret; | |
618 | ||
619 | ret = e_snprintf(buf, PATH_MAX, "%s/../kprobe_events", debugfs_path); | |
620 | if (ret < 0) | |
621 | die("Failed to make kprobe_events path."); | |
622 | ||
f4d7da49 MH |
623 | if (readwrite && !probe_event_dry_run) |
624 | ret = open(buf, O_RDWR, O_APPEND); | |
625 | else | |
626 | ret = open(buf, O_RDONLY, 0); | |
627 | ||
4de189fe MH |
628 | if (ret < 0) { |
629 | if (errno == ENOENT) | |
630 | die("kprobe_events file does not exist -" | |
63bbd5e2 | 631 | " please rebuild with CONFIG_KPROBE_EVENT."); |
4de189fe MH |
632 | else |
633 | die("Could not open kprobe_events file: %s", | |
634 | strerror(errno)); | |
635 | } | |
636 | return ret; | |
637 | } | |
638 | ||
639 | /* Get raw string list of current kprobe_events */ | |
4235b045 | 640 | static struct strlist *get_kprobe_trace_command_rawlist(int fd) |
4de189fe MH |
641 | { |
642 | int ret, idx; | |
643 | FILE *fp; | |
644 | char buf[MAX_CMDLEN]; | |
645 | char *p; | |
646 | struct strlist *sl; | |
647 | ||
648 | sl = strlist__new(true, NULL); | |
649 | ||
650 | fp = fdopen(dup(fd), "r"); | |
651 | while (!feof(fp)) { | |
652 | p = fgets(buf, MAX_CMDLEN, fp); | |
653 | if (!p) | |
654 | break; | |
655 | ||
656 | idx = strlen(p) - 1; | |
657 | if (p[idx] == '\n') | |
658 | p[idx] = '\0'; | |
659 | ret = strlist__add(sl, buf); | |
660 | if (ret < 0) | |
661 | die("strlist__add failed: %s", strerror(-ret)); | |
662 | } | |
663 | fclose(fp); | |
664 | ||
665 | return sl; | |
666 | } | |
667 | ||
278498d4 | 668 | /* Show an event */ |
4235b045 | 669 | static void show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 670 | { |
7e990a51 | 671 | int i, ret; |
278498d4 | 672 | char buf[128]; |
4235b045 | 673 | char *place; |
278498d4 | 674 | |
4235b045 MH |
675 | /* Synthesize only event probe point */ |
676 | place = synthesize_perf_probe_point(&pev->point); | |
677 | ||
678 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 MH |
679 | if (ret < 0) |
680 | die("Failed to copy event: %s", strerror(-ret)); | |
fb1587d8 | 681 | printf(" %-20s (on %s", buf, place); |
278498d4 | 682 | |
4235b045 | 683 | if (pev->nargs > 0) { |
278498d4 | 684 | printf(" with"); |
4235b045 MH |
685 | for (i = 0; i < pev->nargs; i++) |
686 | printf(" %s", pev->args[i].name); | |
278498d4 MH |
687 | } |
688 | printf(")\n"); | |
4235b045 | 689 | free(place); |
278498d4 MH |
690 | } |
691 | ||
4de189fe MH |
692 | /* List up current perf-probe events */ |
693 | void show_perf_probe_events(void) | |
694 | { | |
7ef17aaf | 695 | int fd; |
4235b045 MH |
696 | struct kprobe_trace_event tev; |
697 | struct perf_probe_event pev; | |
4de189fe MH |
698 | struct strlist *rawlist; |
699 | struct str_node *ent; | |
700 | ||
72041334 | 701 | setup_pager(); |
fb1587d8 | 702 | init_vmlinux(); |
4235b045 MH |
703 | |
704 | memset(&tev, 0, sizeof(tev)); | |
705 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 706 | |
f4d7da49 | 707 | fd = open_kprobe_events(false); |
4235b045 | 708 | rawlist = get_kprobe_trace_command_rawlist(fd); |
4de189fe MH |
709 | close(fd); |
710 | ||
adf365f4 | 711 | strlist__for_each(ent, rawlist) { |
4235b045 MH |
712 | parse_kprobe_trace_command(ent->s, &tev); |
713 | convert_to_perf_probe_event(&tev, &pev); | |
278498d4 | 714 | /* Show an event */ |
4235b045 MH |
715 | show_perf_probe_event(&pev); |
716 | clear_perf_probe_event(&pev); | |
717 | clear_kprobe_trace_event(&tev); | |
4de189fe MH |
718 | } |
719 | ||
720 | strlist__delete(rawlist); | |
721 | } | |
722 | ||
b498ce1f | 723 | /* Get current perf-probe event names */ |
4235b045 | 724 | static struct strlist *get_kprobe_trace_event_names(int fd, bool include_group) |
b498ce1f | 725 | { |
fa28244d | 726 | char buf[128]; |
b498ce1f MH |
727 | struct strlist *sl, *rawlist; |
728 | struct str_node *ent; | |
4235b045 | 729 | struct kprobe_trace_event tev; |
b498ce1f | 730 | |
4235b045 | 731 | memset(&tev, 0, sizeof(tev)); |
b498ce1f | 732 | |
4235b045 | 733 | rawlist = get_kprobe_trace_command_rawlist(fd); |
e1d2017b | 734 | sl = strlist__new(true, NULL); |
adf365f4 | 735 | strlist__for_each(ent, rawlist) { |
4235b045 | 736 | parse_kprobe_trace_command(ent->s, &tev); |
fa28244d | 737 | if (include_group) { |
4235b045 MH |
738 | if (e_snprintf(buf, 128, "%s:%s", tev.group, |
739 | tev.event) < 0) | |
fa28244d MH |
740 | die("Failed to copy group:event name."); |
741 | strlist__add(sl, buf); | |
742 | } else | |
4235b045 MH |
743 | strlist__add(sl, tev.event); |
744 | clear_kprobe_trace_event(&tev); | |
b498ce1f MH |
745 | } |
746 | ||
747 | strlist__delete(rawlist); | |
748 | ||
749 | return sl; | |
750 | } | |
751 | ||
4235b045 | 752 | static void write_kprobe_trace_event(int fd, struct kprobe_trace_event *tev) |
50656eec MH |
753 | { |
754 | int ret; | |
4235b045 | 755 | char *buf = synthesize_kprobe_trace_command(tev); |
50656eec | 756 | |
fa28244d | 757 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
758 | if (!probe_event_dry_run) { |
759 | ret = write(fd, buf, strlen(buf)); | |
760 | if (ret <= 0) | |
761 | die("Failed to write event: %s", strerror(errno)); | |
762 | } | |
4235b045 | 763 | free(buf); |
50656eec MH |
764 | } |
765 | ||
b498ce1f | 766 | static void get_new_event_name(char *buf, size_t len, const char *base, |
d761b08b | 767 | struct strlist *namelist, bool allow_suffix) |
b498ce1f MH |
768 | { |
769 | int i, ret; | |
17f88fcd MH |
770 | |
771 | /* Try no suffix */ | |
772 | ret = e_snprintf(buf, len, "%s", base); | |
773 | if (ret < 0) | |
774 | die("snprintf() failed: %s", strerror(-ret)); | |
775 | if (!strlist__has_entry(namelist, buf)) | |
776 | return; | |
777 | ||
d761b08b MH |
778 | if (!allow_suffix) { |
779 | pr_warning("Error: event \"%s\" already exists. " | |
780 | "(Use -f to force duplicates.)\n", base); | |
781 | die("Can't add new event."); | |
782 | } | |
783 | ||
17f88fcd MH |
784 | /* Try to add suffix */ |
785 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f MH |
786 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
787 | if (ret < 0) | |
788 | die("snprintf() failed: %s", strerror(-ret)); | |
789 | if (!strlist__has_entry(namelist, buf)) | |
790 | break; | |
791 | } | |
792 | if (i == MAX_EVENT_INDEX) | |
793 | die("Too many events are on the same function."); | |
794 | } | |
795 | ||
4235b045 MH |
796 | static void __add_kprobe_trace_events(struct perf_probe_event *pev, |
797 | struct kprobe_trace_event *tevs, | |
798 | int ntevs, bool allow_suffix) | |
50656eec | 799 | { |
4235b045 MH |
800 | int i, fd; |
801 | struct kprobe_trace_event *tev; | |
802 | char buf[64]; | |
803 | const char *event, *group; | |
b498ce1f | 804 | struct strlist *namelist; |
50656eec | 805 | |
f4d7da49 | 806 | fd = open_kprobe_events(true); |
b498ce1f | 807 | /* Get current event names */ |
4235b045 MH |
808 | namelist = get_kprobe_trace_event_names(fd, false); |
809 | ||
810 | printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":"); | |
811 | for (i = 0; i < ntevs; i++) { | |
812 | tev = &tevs[i]; | |
813 | if (pev->event) | |
814 | event = pev->event; | |
815 | else | |
816 | if (pev->point.function) | |
817 | event = pev->point.function; | |
818 | else | |
819 | event = tev->point.symbol; | |
820 | if (pev->group) | |
821 | group = pev->group; | |
822 | else | |
823 | group = PERFPROBE_GROUP; | |
824 | ||
825 | /* Get an unused new event name */ | |
826 | get_new_event_name(buf, 64, event, namelist, allow_suffix); | |
827 | event = buf; | |
828 | ||
829 | tev->event = xstrdup(event); | |
830 | tev->group = xstrdup(group); | |
831 | write_kprobe_trace_event(fd, tev); | |
832 | /* Add added event name to namelist */ | |
833 | strlist__add(namelist, event); | |
834 | ||
835 | /* Trick here - save current event/group */ | |
836 | event = pev->event; | |
837 | group = pev->group; | |
838 | pev->event = tev->event; | |
839 | pev->group = tev->group; | |
840 | show_perf_probe_event(pev); | |
841 | /* Trick here - restore current event/group */ | |
842 | pev->event = (char *)event; | |
843 | pev->group = (char *)group; | |
844 | ||
845 | /* | |
846 | * Probes after the first probe which comes from same | |
847 | * user input are always allowed to add suffix, because | |
848 | * there might be several addresses corresponding to | |
849 | * one code line. | |
850 | */ | |
851 | allow_suffix = true; | |
50656eec | 852 | } |
a9b495b0 MH |
853 | /* Show how to use the event. */ |
854 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
4235b045 | 855 | printf("\tperf record -e %s:%s -a sleep 1\n\n", tev->group, tev->event); |
a9b495b0 | 856 | |
e1d2017b | 857 | strlist__delete(namelist); |
50656eec MH |
858 | close(fd); |
859 | } | |
fa28244d | 860 | |
4235b045 MH |
861 | static int convert_to_kprobe_trace_events(struct perf_probe_event *pev, |
862 | struct kprobe_trace_event **tevs) | |
e0faa8d3 MH |
863 | { |
864 | struct symbol *sym; | |
4235b045 | 865 | bool need_dwarf; |
e0faa8d3 MH |
866 | #ifndef NO_DWARF_SUPPORT |
867 | int fd; | |
868 | #endif | |
4235b045 MH |
869 | int ntevs = 0, i; |
870 | struct kprobe_trace_event *tev; | |
871 | ||
872 | need_dwarf = perf_probe_event_need_dwarf(pev); | |
e0faa8d3 MH |
873 | |
874 | if (need_dwarf) | |
875 | #ifdef NO_DWARF_SUPPORT | |
876 | die("Debuginfo-analysis is not supported"); | |
877 | #else /* !NO_DWARF_SUPPORT */ | |
878 | pr_debug("Some probes require debuginfo.\n"); | |
879 | ||
880 | fd = open_vmlinux(); | |
881 | if (fd < 0) { | |
882 | if (need_dwarf) | |
883 | die("Could not open debuginfo file."); | |
884 | ||
885 | pr_debug("Could not open vmlinux/module file." | |
886 | " Try to use symbols.\n"); | |
887 | goto end_dwarf; | |
888 | } | |
889 | ||
890 | /* Searching probe points */ | |
4235b045 MH |
891 | ntevs = find_kprobe_trace_events(fd, pev, tevs); |
892 | ||
893 | if (ntevs > 0) /* Found */ | |
894 | goto found; | |
895 | ||
896 | if (ntevs == 0) /* No error but failed to find probe point. */ | |
897 | die("Probe point '%s' not found. - probe not added.", | |
898 | synthesize_perf_probe_point(&pev->point)); | |
899 | ||
900 | /* Error path */ | |
901 | if (need_dwarf) { | |
902 | if (ntevs == -ENOENT) | |
903 | pr_warning("No dwarf info found in the vmlinux - please rebuild with CONFIG_DEBUG_INFO=y.\n"); | |
904 | die("Could not analyze debuginfo."); | |
e0faa8d3 | 905 | } |
4235b045 MH |
906 | pr_debug("An error occurred in debuginfo analysis." |
907 | " Try to use symbols.\n"); | |
e0faa8d3 MH |
908 | |
909 | end_dwarf: | |
910 | #endif /* !NO_DWARF_SUPPORT */ | |
911 | ||
4235b045 MH |
912 | /* Allocate trace event buffer */ |
913 | ntevs = 1; | |
914 | tev = *tevs = xzalloc(sizeof(struct kprobe_trace_event)); | |
915 | ||
916 | /* Copy parameters */ | |
917 | tev->point.symbol = xstrdup(pev->point.function); | |
918 | tev->point.offset = pev->point.offset; | |
919 | tev->nargs = pev->nargs; | |
920 | if (tev->nargs) { | |
921 | tev->args = xzalloc(sizeof(struct kprobe_trace_arg) | |
922 | * tev->nargs); | |
923 | for (i = 0; i < tev->nargs; i++) | |
924 | tev->args[i].value = xstrdup(pev->args[i].name); | |
925 | } | |
926 | ||
927 | /* Currently just checking function name from symbol map */ | |
928 | sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION], | |
929 | tev->point.symbol, NULL); | |
930 | if (!sym) | |
931 | die("Kernel symbol \'%s\' not found - probe not added.", | |
932 | tev->point.symbol); | |
933 | found: | |
934 | close(fd); | |
935 | return ntevs; | |
936 | } | |
937 | ||
938 | struct __event_package { | |
939 | struct perf_probe_event *pev; | |
940 | struct kprobe_trace_event *tevs; | |
941 | int ntevs; | |
942 | }; | |
943 | ||
944 | void add_perf_probe_events(struct perf_probe_event *pevs, int npevs, | |
945 | bool force_add) | |
946 | { | |
947 | int i; | |
948 | struct __event_package *pkgs; | |
949 | ||
950 | pkgs = xzalloc(sizeof(struct __event_package) * npevs); | |
951 | ||
952 | /* Init vmlinux path */ | |
953 | init_vmlinux(); | |
954 | ||
955 | /* Loop 1: convert all events */ | |
956 | for (i = 0; i < npevs; i++) { | |
957 | pkgs[i].pev = &pevs[i]; | |
958 | /* Convert with or without debuginfo */ | |
959 | pkgs[i].ntevs = convert_to_kprobe_trace_events(pkgs[i].pev, | |
960 | &pkgs[i].tevs); | |
e0faa8d3 MH |
961 | } |
962 | ||
4235b045 MH |
963 | /* Loop 2: add all events */ |
964 | for (i = 0; i < npevs; i++) | |
965 | __add_kprobe_trace_events(pkgs[i].pev, pkgs[i].tevs, | |
966 | pkgs[i].ntevs, force_add); | |
967 | /* TODO: cleanup all trace events? */ | |
e0faa8d3 MH |
968 | } |
969 | ||
bbbb521b MH |
970 | static void __del_trace_kprobe_event(int fd, struct str_node *ent) |
971 | { | |
972 | char *p; | |
973 | char buf[128]; | |
4235b045 | 974 | int ret; |
bbbb521b MH |
975 | |
976 | /* Convert from perf-probe event to trace-kprobe event */ | |
977 | if (e_snprintf(buf, 128, "-:%s", ent->s) < 0) | |
978 | die("Failed to copy event."); | |
979 | p = strchr(buf + 2, ':'); | |
980 | if (!p) | |
981 | die("Internal error: %s should have ':' but not.", ent->s); | |
982 | *p = '/'; | |
983 | ||
4235b045 MH |
984 | pr_debug("Writing event: %s\n", buf); |
985 | ret = write(fd, buf, strlen(buf)); | |
986 | if (ret <= 0) | |
987 | die("Failed to write event: %s", strerror(errno)); | |
bbbb521b MH |
988 | printf("Remove event: %s\n", ent->s); |
989 | } | |
990 | ||
fa28244d MH |
991 | static void del_trace_kprobe_event(int fd, const char *group, |
992 | const char *event, struct strlist *namelist) | |
993 | { | |
994 | char buf[128]; | |
bbbb521b MH |
995 | struct str_node *ent, *n; |
996 | int found = 0; | |
fa28244d MH |
997 | |
998 | if (e_snprintf(buf, 128, "%s:%s", group, event) < 0) | |
999 | die("Failed to copy event."); | |
fa28244d | 1000 | |
bbbb521b MH |
1001 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
1002 | strlist__for_each_safe(ent, n, namelist) | |
1003 | if (strglobmatch(ent->s, buf)) { | |
1004 | found++; | |
1005 | __del_trace_kprobe_event(fd, ent); | |
1006 | strlist__remove(namelist, ent); | |
1007 | } | |
1008 | } else { | |
1009 | ent = strlist__find(namelist, buf); | |
1010 | if (ent) { | |
1011 | found++; | |
1012 | __del_trace_kprobe_event(fd, ent); | |
1013 | strlist__remove(namelist, ent); | |
1014 | } | |
1015 | } | |
1016 | if (found == 0) | |
1017 | pr_info("Info: event \"%s\" does not exist, could not remove it.\n", buf); | |
fa28244d MH |
1018 | } |
1019 | ||
4235b045 | 1020 | void del_perf_probe_events(struct strlist *dellist) |
fa28244d MH |
1021 | { |
1022 | int fd; | |
fa28244d MH |
1023 | const char *group, *event; |
1024 | char *p, *str; | |
1025 | struct str_node *ent; | |
1026 | struct strlist *namelist; | |
1027 | ||
f4d7da49 | 1028 | fd = open_kprobe_events(true); |
fa28244d | 1029 | /* Get current event names */ |
4235b045 | 1030 | namelist = get_kprobe_trace_event_names(fd, true); |
fa28244d | 1031 | |
adf365f4 | 1032 | strlist__for_each(ent, dellist) { |
31facc5f | 1033 | str = xstrdup(ent->s); |
bbbb521b | 1034 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
1035 | p = strchr(str, ':'); |
1036 | if (p) { | |
1037 | group = str; | |
1038 | *p = '\0'; | |
1039 | event = p + 1; | |
1040 | } else { | |
bbbb521b | 1041 | group = "*"; |
fa28244d MH |
1042 | event = str; |
1043 | } | |
bbbb521b | 1044 | pr_debug("Group: %s, Event: %s\n", group, event); |
fa28244d MH |
1045 | del_trace_kprobe_event(fd, group, event, namelist); |
1046 | free(str); | |
1047 | } | |
1048 | strlist__delete(namelist); | |
1049 | close(fd); | |
1050 | } | |
1051 | ||
631c9def | 1052 | #define LINEBUF_SIZE 256 |
5c8d1cbb | 1053 | #define NR_ADDITIONAL_LINES 2 |
631c9def MH |
1054 | |
1055 | static void show_one_line(FILE *fp, unsigned int l, bool skip, bool show_num) | |
1056 | { | |
1057 | char buf[LINEBUF_SIZE]; | |
1058 | const char *color = PERF_COLOR_BLUE; | |
1059 | ||
1060 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
1061 | goto error; | |
1062 | if (!skip) { | |
1063 | if (show_num) | |
1064 | fprintf(stdout, "%7u %s", l, buf); | |
1065 | else | |
1066 | color_fprintf(stdout, color, " %s", buf); | |
1067 | } | |
1068 | ||
1069 | while (strlen(buf) == LINEBUF_SIZE - 1 && | |
1070 | buf[LINEBUF_SIZE - 2] != '\n') { | |
1071 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) | |
1072 | goto error; | |
1073 | if (!skip) { | |
1074 | if (show_num) | |
1075 | fprintf(stdout, "%s", buf); | |
1076 | else | |
1077 | color_fprintf(stdout, color, "%s", buf); | |
1078 | } | |
1079 | } | |
1080 | return; | |
1081 | error: | |
1082 | if (feof(fp)) | |
1083 | die("Source file is shorter than expected."); | |
1084 | else | |
1085 | die("File read error: %s", strerror(errno)); | |
1086 | } | |
1087 | ||
1088 | void show_line_range(struct line_range *lr) | |
1089 | { | |
1090 | unsigned int l = 1; | |
1091 | struct line_node *ln; | |
1092 | FILE *fp; | |
e0faa8d3 MH |
1093 | int fd, ret; |
1094 | ||
1095 | /* Search a line range */ | |
1096 | init_vmlinux(); | |
1097 | fd = open_vmlinux(); | |
1098 | if (fd < 0) | |
1099 | die("Could not open debuginfo file."); | |
1100 | ret = find_line_range(fd, lr); | |
1101 | if (ret <= 0) | |
1102 | die("Source line is not found.\n"); | |
1103 | close(fd); | |
631c9def MH |
1104 | |
1105 | setup_pager(); | |
1106 | ||
1107 | if (lr->function) | |
1108 | fprintf(stdout, "<%s:%d>\n", lr->function, | |
1109 | lr->start - lr->offset); | |
1110 | else | |
1111 | fprintf(stdout, "<%s:%d>\n", lr->file, lr->start); | |
1112 | ||
1113 | fp = fopen(lr->path, "r"); | |
1114 | if (fp == NULL) | |
1115 | die("Failed to open %s: %s", lr->path, strerror(errno)); | |
1116 | /* Skip to starting line number */ | |
1117 | while (l < lr->start) | |
1118 | show_one_line(fp, l++, true, false); | |
1119 | ||
1120 | list_for_each_entry(ln, &lr->line_list, list) { | |
1121 | while (ln->line > l) | |
1122 | show_one_line(fp, (l++) - lr->offset, false, false); | |
1123 | show_one_line(fp, (l++) - lr->offset, false, true); | |
1124 | } | |
5c8d1cbb MH |
1125 | |
1126 | if (lr->end == INT_MAX) | |
1127 | lr->end = l + NR_ADDITIONAL_LINES; | |
1128 | while (l < lr->end && !feof(fp)) | |
1129 | show_one_line(fp, (l++) - lr->offset, false, false); | |
1130 | ||
631c9def MH |
1131 | fclose(fp); |
1132 | } | |
e0faa8d3 MH |
1133 | |
1134 |