Commit | Line | Data |
---|---|---|
1aed2671 | 1 | #include "../perf.h" |
4cf40131 | 2 | #include "util.h" |
69e3f52d | 3 | #include <sys/mman.h> |
89fe808a | 4 | #ifdef HAVE_BACKTRACE_SUPPORT |
dc4552bf | 5 | #include <execinfo.h> |
c9f08bee | 6 | #endif |
dc4552bf ACM |
7 | #include <stdio.h> |
8 | #include <stdlib.h> | |
cef82c9f JO |
9 | #include <string.h> |
10 | #include <errno.h> | |
838d1452 | 11 | #include <linux/kernel.h> |
4cf40131 | 12 | |
1aed2671 JR |
13 | /* |
14 | * XXX We need to find a better place for these things... | |
15 | */ | |
0c1fe6b2 ACM |
16 | unsigned int page_size; |
17 | ||
0c6332e9 ACM |
18 | bool test_attr__enabled; |
19 | ||
1aed2671 | 20 | bool perf_host = true; |
c4a7dca9 | 21 | bool perf_guest = false; |
1aed2671 | 22 | |
1355915a BP |
23 | char tracing_events_path[PATH_MAX + 1] = "/sys/kernel/debug/tracing/events"; |
24 | ||
1aed2671 JR |
25 | void event_attr_init(struct perf_event_attr *attr) |
26 | { | |
27 | if (!perf_host) | |
28 | attr->exclude_host = 1; | |
29 | if (!perf_guest) | |
30 | attr->exclude_guest = 1; | |
7e1ccd38 SE |
31 | /* to capture ABI version */ |
32 | attr->size = sizeof(*attr); | |
1aed2671 JR |
33 | } |
34 | ||
4cf40131 ACM |
35 | int mkdir_p(char *path, mode_t mode) |
36 | { | |
37 | struct stat st; | |
38 | int err; | |
39 | char *d = path; | |
40 | ||
41 | if (*d != '/') | |
42 | return -1; | |
43 | ||
44 | if (stat(path, &st) == 0) | |
45 | return 0; | |
46 | ||
47 | while (*++d == '/'); | |
48 | ||
49 | while ((d = strchr(d, '/'))) { | |
50 | *d = '\0'; | |
51 | err = stat(path, &st) && mkdir(path, mode); | |
52 | *d++ = '/'; | |
53 | if (err) | |
54 | return -1; | |
55 | while (*d == '/') | |
56 | ++d; | |
57 | } | |
58 | return (stat(path, &st) && mkdir(path, mode)) ? -1 : 0; | |
59 | } | |
60 | ||
9a17d726 | 61 | static int slow_copyfile(const char *from, const char *to, mode_t mode) |
9e201442 | 62 | { |
9a17d726 | 63 | int err = -1; |
9e201442 ACM |
64 | char *line = NULL; |
65 | size_t n; | |
66 | FILE *from_fp = fopen(from, "r"), *to_fp; | |
9a17d726 | 67 | mode_t old_umask; |
9e201442 ACM |
68 | |
69 | if (from_fp == NULL) | |
70 | goto out; | |
71 | ||
9a17d726 | 72 | old_umask = umask(mode ^ 0777); |
9e201442 | 73 | to_fp = fopen(to, "w"); |
9a17d726 | 74 | umask(old_umask); |
9e201442 ACM |
75 | if (to_fp == NULL) |
76 | goto out_fclose_from; | |
77 | ||
78 | while (getline(&line, &n, from_fp) > 0) | |
79 | if (fputs(line, to_fp) == EOF) | |
80 | goto out_fclose_to; | |
81 | err = 0; | |
82 | out_fclose_to: | |
83 | fclose(to_fp); | |
84 | free(line); | |
85 | out_fclose_from: | |
86 | fclose(from_fp); | |
87 | out: | |
88 | return err; | |
89 | } | |
90 | ||
9a17d726 | 91 | int copyfile_mode(const char *from, const char *to, mode_t mode) |
4cf40131 ACM |
92 | { |
93 | int fromfd, tofd; | |
94 | struct stat st; | |
95 | void *addr; | |
96 | int err = -1; | |
97 | ||
98 | if (stat(from, &st)) | |
99 | goto out; | |
100 | ||
9e201442 | 101 | if (st.st_size == 0) /* /proc? do it slowly... */ |
9a17d726 | 102 | return slow_copyfile(from, to, mode); |
9e201442 | 103 | |
4cf40131 ACM |
104 | fromfd = open(from, O_RDONLY); |
105 | if (fromfd < 0) | |
106 | goto out; | |
107 | ||
9a17d726 | 108 | tofd = creat(to, mode); |
4cf40131 ACM |
109 | if (tofd < 0) |
110 | goto out_close_from; | |
111 | ||
112 | addr = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fromfd, 0); | |
113 | if (addr == MAP_FAILED) | |
114 | goto out_close_to; | |
115 | ||
116 | if (write(tofd, addr, st.st_size) == st.st_size) | |
117 | err = 0; | |
118 | ||
119 | munmap(addr, st.st_size); | |
120 | out_close_to: | |
121 | close(tofd); | |
122 | if (err) | |
123 | unlink(to); | |
124 | out_close_from: | |
125 | close(fromfd); | |
126 | out: | |
127 | return err; | |
128 | } | |
c82ee828 | 129 | |
9a17d726 AH |
130 | int copyfile(const char *from, const char *to) |
131 | { | |
132 | return copyfile_mode(from, to, 0755); | |
133 | } | |
134 | ||
c82ee828 ACM |
135 | unsigned long convert_unit(unsigned long value, char *unit) |
136 | { | |
137 | *unit = ' '; | |
138 | ||
139 | if (value > 1000) { | |
140 | value /= 1000; | |
141 | *unit = 'K'; | |
142 | } | |
143 | ||
144 | if (value > 1000) { | |
145 | value /= 1000; | |
146 | *unit = 'M'; | |
147 | } | |
148 | ||
149 | if (value > 1000) { | |
150 | value /= 1000; | |
151 | *unit = 'G'; | |
152 | } | |
153 | ||
154 | return value; | |
155 | } | |
1e7972cc | 156 | |
bc3a502b | 157 | static ssize_t ion(bool is_read, int fd, void *buf, size_t n) |
1e7972cc ACM |
158 | { |
159 | void *buf_start = buf; | |
838d1452 | 160 | size_t left = n; |
1e7972cc | 161 | |
838d1452 | 162 | while (left) { |
bc3a502b JO |
163 | ssize_t ret = is_read ? read(fd, buf, left) : |
164 | write(fd, buf, left); | |
1e7972cc ACM |
165 | |
166 | if (ret <= 0) | |
167 | return ret; | |
168 | ||
838d1452 JO |
169 | left -= ret; |
170 | buf += ret; | |
1e7972cc ACM |
171 | } |
172 | ||
838d1452 JO |
173 | BUG_ON((size_t)(buf - buf_start) != n); |
174 | return n; | |
1e7972cc | 175 | } |
61e04b33 | 176 | |
bc3a502b JO |
177 | /* |
178 | * Read exactly 'n' bytes or return an error. | |
179 | */ | |
180 | ssize_t readn(int fd, void *buf, size_t n) | |
181 | { | |
182 | return ion(true, fd, buf, n); | |
183 | } | |
184 | ||
185 | /* | |
186 | * Write exactly 'n' bytes or return an error. | |
187 | */ | |
188 | ssize_t writen(int fd, void *buf, size_t n) | |
189 | { | |
190 | return ion(false, fd, buf, n); | |
191 | } | |
192 | ||
61e04b33 ACM |
193 | size_t hex_width(u64 v) |
194 | { | |
195 | size_t n = 1; | |
196 | ||
197 | while ((v >>= 4)) | |
198 | ++n; | |
199 | ||
200 | return n; | |
201 | } | |
dc4552bf | 202 | |
b2aff5f6 JO |
203 | static int hex(char ch) |
204 | { | |
205 | if ((ch >= '0') && (ch <= '9')) | |
206 | return ch - '0'; | |
207 | if ((ch >= 'a') && (ch <= 'f')) | |
208 | return ch - 'a' + 10; | |
209 | if ((ch >= 'A') && (ch <= 'F')) | |
210 | return ch - 'A' + 10; | |
211 | return -1; | |
212 | } | |
213 | ||
214 | /* | |
215 | * While we find nice hex chars, build a long_val. | |
216 | * Return number of chars processed. | |
217 | */ | |
218 | int hex2u64(const char *ptr, u64 *long_val) | |
219 | { | |
220 | const char *p = ptr; | |
221 | *long_val = 0; | |
222 | ||
223 | while (*p) { | |
224 | const int hex_val = hex(*p); | |
225 | ||
226 | if (hex_val < 0) | |
227 | break; | |
228 | ||
229 | *long_val = (*long_val << 4) | hex_val; | |
230 | p++; | |
231 | } | |
232 | ||
233 | return p - ptr; | |
234 | } | |
235 | ||
dc4552bf | 236 | /* Obtain a backtrace and print it to stdout. */ |
89fe808a | 237 | #ifdef HAVE_BACKTRACE_SUPPORT |
dc4552bf ACM |
238 | void dump_stack(void) |
239 | { | |
240 | void *array[16]; | |
241 | size_t size = backtrace(array, ARRAY_SIZE(array)); | |
242 | char **strings = backtrace_symbols(array, size); | |
243 | size_t i; | |
244 | ||
245 | printf("Obtained %zd stack frames.\n", size); | |
246 | ||
247 | for (i = 0; i < size; i++) | |
248 | printf("%s\n", strings[i]); | |
249 | ||
250 | free(strings); | |
251 | } | |
c9f08bee IT |
252 | #else |
253 | void dump_stack(void) {} | |
254 | #endif | |
2c803e52 DA |
255 | |
256 | void get_term_dimensions(struct winsize *ws) | |
257 | { | |
258 | char *s = getenv("LINES"); | |
259 | ||
260 | if (s != NULL) { | |
261 | ws->ws_row = atoi(s); | |
262 | s = getenv("COLUMNS"); | |
263 | if (s != NULL) { | |
264 | ws->ws_col = atoi(s); | |
265 | if (ws->ws_row && ws->ws_col) | |
266 | return; | |
267 | } | |
268 | } | |
269 | #ifdef TIOCGWINSZ | |
270 | if (ioctl(1, TIOCGWINSZ, ws) == 0 && | |
271 | ws->ws_row && ws->ws_col) | |
272 | return; | |
273 | #endif | |
274 | ws->ws_row = 25; | |
275 | ws->ws_col = 80; | |
276 | } | |
1355915a BP |
277 | |
278 | static void set_tracing_events_path(const char *mountpoint) | |
279 | { | |
280 | snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s", | |
281 | mountpoint, "tracing/events"); | |
282 | } | |
283 | ||
284 | const char *perf_debugfs_mount(const char *mountpoint) | |
285 | { | |
286 | const char *mnt; | |
287 | ||
288 | mnt = debugfs_mount(mountpoint); | |
289 | if (!mnt) | |
290 | return NULL; | |
291 | ||
292 | set_tracing_events_path(mnt); | |
293 | ||
294 | return mnt; | |
295 | } | |
296 | ||
297 | void perf_debugfs_set_path(const char *mntpt) | |
298 | { | |
299 | snprintf(debugfs_mountpoint, strlen(debugfs_mountpoint), "%s", mntpt); | |
300 | set_tracing_events_path(mntpt); | |
301 | } | |
167aedc4 NK |
302 | |
303 | static const char *find_debugfs(void) | |
304 | { | |
305 | const char *path = perf_debugfs_mount(NULL); | |
306 | ||
307 | if (!path) | |
308 | fprintf(stderr, "Your kernel does not support the debugfs filesystem"); | |
309 | ||
310 | return path; | |
311 | } | |
312 | ||
313 | /* | |
314 | * Finds the path to the debugfs/tracing | |
315 | * Allocates the string and stores it. | |
316 | */ | |
317 | const char *find_tracing_dir(void) | |
318 | { | |
319 | static char *tracing; | |
320 | static int tracing_found; | |
321 | const char *debugfs; | |
322 | ||
323 | if (tracing_found) | |
324 | return tracing; | |
325 | ||
326 | debugfs = find_debugfs(); | |
327 | if (!debugfs) | |
328 | return NULL; | |
329 | ||
330 | tracing = malloc(strlen(debugfs) + 9); | |
331 | if (!tracing) | |
332 | return NULL; | |
333 | ||
334 | sprintf(tracing, "%s/tracing", debugfs); | |
335 | ||
336 | tracing_found = 1; | |
337 | return tracing; | |
338 | } | |
339 | ||
340 | char *get_tracing_file(const char *name) | |
341 | { | |
342 | const char *tracing; | |
343 | char *file; | |
344 | ||
345 | tracing = find_tracing_dir(); | |
346 | if (!tracing) | |
347 | return NULL; | |
348 | ||
349 | file = malloc(strlen(tracing) + strlen(name) + 2); | |
350 | if (!file) | |
351 | return NULL; | |
352 | ||
353 | sprintf(file, "%s/%s", tracing, name); | |
354 | return file; | |
355 | } | |
356 | ||
357 | void put_tracing_file(char *file) | |
358 | { | |
359 | free(file); | |
360 | } | |
3b47abe1 NK |
361 | |
362 | int parse_nsec_time(const char *str, u64 *ptime) | |
363 | { | |
364 | u64 time_sec, time_nsec; | |
365 | char *end; | |
366 | ||
367 | time_sec = strtoul(str, &end, 10); | |
368 | if (*end != '.' && *end != '\0') | |
369 | return -1; | |
370 | ||
371 | if (*end == '.') { | |
372 | int i; | |
373 | char nsec_buf[10]; | |
374 | ||
375 | if (strlen(++end) > 9) | |
376 | return -1; | |
377 | ||
378 | strncpy(nsec_buf, end, 9); | |
379 | nsec_buf[9] = '\0'; | |
380 | ||
381 | /* make it nsec precision */ | |
382 | for (i = strlen(nsec_buf); i < 9; i++) | |
383 | nsec_buf[i] = '0'; | |
384 | ||
385 | time_nsec = strtoul(nsec_buf, &end, 10); | |
386 | if (*end != '\0') | |
387 | return -1; | |
388 | } else | |
389 | time_nsec = 0; | |
390 | ||
391 | *ptime = time_sec * NSEC_PER_SEC + time_nsec; | |
392 | return 0; | |
393 | } | |
27050f53 JO |
394 | |
395 | unsigned long parse_tag_value(const char *str, struct parse_tag *tags) | |
396 | { | |
397 | struct parse_tag *i = tags; | |
398 | ||
399 | while (i->tag) { | |
400 | char *s; | |
401 | ||
402 | s = strchr(str, i->tag); | |
403 | if (s) { | |
404 | unsigned long int value; | |
405 | char *endptr; | |
406 | ||
407 | value = strtoul(str, &endptr, 10); | |
408 | if (s != endptr) | |
409 | break; | |
410 | ||
56921bec AH |
411 | if (value > ULONG_MAX / i->mult) |
412 | break; | |
27050f53 JO |
413 | value *= i->mult; |
414 | return value; | |
415 | } | |
416 | i++; | |
417 | } | |
418 | ||
419 | return (unsigned long) -1; | |
420 | } | |
97a07f10 ACM |
421 | |
422 | int filename__read_int(const char *filename, int *value) | |
423 | { | |
424 | char line[64]; | |
425 | int fd = open(filename, O_RDONLY), err = -1; | |
426 | ||
427 | if (fd < 0) | |
428 | return -1; | |
429 | ||
430 | if (read(fd, line, sizeof(line)) > 0) { | |
431 | *value = atoi(line); | |
432 | err = 0; | |
433 | } | |
434 | ||
435 | close(fd); | |
436 | return err; | |
437 | } | |
cef82c9f JO |
438 | |
439 | int filename__read_str(const char *filename, char **buf, size_t *sizep) | |
440 | { | |
441 | size_t size = 0, alloc_size = 0; | |
442 | void *bf = NULL, *nbf; | |
443 | int fd, n, err = 0; | |
444 | ||
445 | fd = open(filename, O_RDONLY); | |
446 | if (fd < 0) | |
447 | return -errno; | |
448 | ||
449 | do { | |
450 | if (size == alloc_size) { | |
451 | alloc_size += BUFSIZ; | |
452 | nbf = realloc(bf, alloc_size); | |
453 | if (!nbf) { | |
454 | err = -ENOMEM; | |
455 | break; | |
456 | } | |
457 | ||
458 | bf = nbf; | |
459 | } | |
460 | ||
461 | n = read(fd, bf + size, alloc_size - size); | |
462 | if (n < 0) { | |
463 | if (size) { | |
464 | pr_warning("read failed %d: %s\n", | |
465 | errno, strerror(errno)); | |
466 | err = 0; | |
467 | } else | |
468 | err = -errno; | |
469 | ||
470 | break; | |
471 | } | |
472 | ||
473 | size += n; | |
474 | } while (n > 0); | |
475 | ||
476 | if (!err) { | |
477 | *sizep = size; | |
478 | *buf = bf; | |
479 | } else | |
480 | free(bf); | |
481 | ||
482 | close(fd); | |
483 | return err; | |
484 | } |