blob: 85c56800f17a6018eb080db40e9a08b03f9a460c [file] [log] [blame]
Joerg Roedel1aed2672012-01-04 17:54:20 +01001#include "../perf.h"
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -02002#include "util.h"
Jiri Olsa84f5d362014-07-14 23:46:48 +02003#include "debug.h"
Borislav Petkovcd0cfad2013-12-09 17:14:24 +01004#include <api/fs/fs.h>
Frederic Weisbecker69e3f522010-01-16 14:21:15 +01005#include <sys/mman.h>
Wang Nan07bc5c62015-11-06 13:55:35 +00006#include <sys/utsname.h>
Ingo Molnar89fe8082013-09-30 12:07:11 +02007#ifdef HAVE_BACKTRACE_SUPPORT
Arnaldo Carvalho de Melodc4552b2012-08-07 23:32:05 -03008#include <execinfo.h>
Irina Tirdeac9f08be2012-09-08 03:43:23 +03009#endif
Arnaldo Carvalho de Melodc4552b2012-08-07 23:32:05 -030010#include <stdio.h>
11#include <stdlib.h>
Jiri Olsacef82c92013-12-03 14:09:22 +010012#include <string.h>
13#include <errno.h>
Adrian Hunter1a472452013-12-11 14:36:23 +020014#include <limits.h>
Adrian Hunter71db07b2013-12-11 14:36:32 +020015#include <byteswap.h>
Jiri Olsa838d1452013-11-28 11:30:15 +010016#include <linux/kernel.h>
Wang Nanc339b1a2016-02-24 11:20:44 +000017#include <linux/log2.h>
Arnaldo Carvalho de Melobd48c632016-08-05 15:40:30 -030018#include <linux/time64.h>
Jiri Olsa9398c482014-08-11 10:50:02 +020019#include <unistd.h>
Jiri Olsa23aadb12014-10-01 18:00:26 +020020#include "callchain.h"
Namhyung Kim14cbfbe2016-01-07 20:41:53 +090021#include "strlist.h"
Jiri Olsa23aadb12014-10-01 18:00:26 +020022
Jiri Olsa347ca872016-07-04 14:16:21 +020023#define CALLCHAIN_PARAM_DEFAULT \
24 .mode = CHAIN_GRAPH_ABS, \
25 .min_percent = 0.5, \
26 .order = ORDER_CALLEE, \
27 .key = CCKEY_FUNCTION, \
28 .value = CCVAL_PERCENT, \
29
30struct callchain_param callchain_param = {
31 CALLCHAIN_PARAM_DEFAULT
32};
33
34struct callchain_param callchain_param_default = {
35 CALLCHAIN_PARAM_DEFAULT
Jiri Olsa23aadb12014-10-01 18:00:26 +020036};
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -020037
Joerg Roedel1aed2672012-01-04 17:54:20 +010038/*
39 * XXX We need to find a better place for these things...
40 */
Arnaldo Carvalho de Melo0c1fe6b2012-10-06 14:57:10 -030041unsigned int page_size;
Don Zickus2b1b7102014-05-30 16:10:05 -040042int cacheline_size;
Arnaldo Carvalho de Melo0c1fe6b2012-10-06 14:57:10 -030043
Arnaldo Carvalho de Meloa29d5c92016-05-16 21:16:54 -030044int sysctl_perf_event_max_stack = PERF_MAX_STACK_DEPTH;
45int sysctl_perf_event_max_contexts_per_stack = PERF_MAX_CONTEXTS_PER_STACK;
Arnaldo Carvalho de Melo4cb93442016-04-27 10:16:24 -030046
Arnaldo Carvalho de Melo0c6332e2012-12-13 16:43:04 -030047bool test_attr__enabled;
48
Joerg Roedel1aed2672012-01-04 17:54:20 +010049bool perf_host = true;
Joerg Roedelc4a7dca2012-02-10 18:05:05 +010050bool perf_guest = false;
Joerg Roedel1aed2672012-01-04 17:54:20 +010051
52void event_attr_init(struct perf_event_attr *attr)
53{
54 if (!perf_host)
55 attr->exclude_host = 1;
56 if (!perf_guest)
57 attr->exclude_guest = 1;
Stephane Eranian7e1ccd32012-02-09 16:12:38 +010058 /* to capture ABI version */
59 attr->size = sizeof(*attr);
Joerg Roedel1aed2672012-01-04 17:54:20 +010060}
61
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -020062int mkdir_p(char *path, mode_t mode)
63{
64 struct stat st;
65 int err;
66 char *d = path;
67
68 if (*d != '/')
69 return -1;
70
71 if (stat(path, &st) == 0)
72 return 0;
73
74 while (*++d == '/');
75
76 while ((d = strchr(d, '/'))) {
77 *d = '\0';
78 err = stat(path, &st) && mkdir(path, mode);
79 *d++ = '/';
80 if (err)
81 return -1;
82 while (*d == '/')
83 ++d;
84 }
85 return (stat(path, &st) && mkdir(path, mode)) ? -1 : 0;
86}
87
Namhyung Kim0b1de0be2015-05-18 09:30:17 +090088int rm_rf(char *path)
89{
90 DIR *dir;
91 int ret = 0;
92 struct dirent *d;
93 char namebuf[PATH_MAX];
94
95 dir = opendir(path);
96 if (dir == NULL)
97 return 0;
98
99 while ((d = readdir(dir)) != NULL && !ret) {
100 struct stat statbuf;
101
102 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
103 continue;
104
105 scnprintf(namebuf, sizeof(namebuf), "%s/%s",
106 path, d->d_name);
107
Masami Hiramatsu2a1ef032016-06-08 18:29:11 +0900108 /* We have to check symbolic link itself */
109 ret = lstat(namebuf, &statbuf);
Namhyung Kim0b1de0be2015-05-18 09:30:17 +0900110 if (ret < 0) {
111 pr_debug("stat failed: %s\n", namebuf);
112 break;
113 }
114
Masami Hiramatsu2a1ef032016-06-08 18:29:11 +0900115 if (S_ISDIR(statbuf.st_mode))
Namhyung Kim0b1de0be2015-05-18 09:30:17 +0900116 ret = rm_rf(namebuf);
Masami Hiramatsu2a1ef032016-06-08 18:29:11 +0900117 else
118 ret = unlink(namebuf);
Namhyung Kim0b1de0be2015-05-18 09:30:17 +0900119 }
120 closedir(dir);
121
122 if (ret < 0)
123 return ret;
124
125 return rmdir(path);
126}
127
Masami Hiramatsue1ce7262016-04-26 18:02:42 +0900128/* A filter which removes dot files */
129bool lsdir_no_dot_filter(const char *name __maybe_unused, struct dirent *d)
130{
131 return d->d_name[0] != '.';
132}
133
134/* lsdir reads a directory and store it in strlist */
135struct strlist *lsdir(const char *name,
136 bool (*filter)(const char *, struct dirent *))
137{
138 struct strlist *list = NULL;
139 DIR *dir;
140 struct dirent *d;
141
142 dir = opendir(name);
143 if (!dir)
144 return NULL;
145
146 list = strlist__new(NULL, NULL);
147 if (!list) {
Masami Hiramatsu357a54f2016-05-11 22:51:27 +0900148 errno = ENOMEM;
Masami Hiramatsue1ce7262016-04-26 18:02:42 +0900149 goto out;
150 }
151
152 while ((d = readdir(dir)) != NULL) {
153 if (!filter || filter(name, d))
154 strlist__add(list, d->d_name);
155 }
156
157out:
158 closedir(dir);
159 return list;
160}
161
Milos Vyleteld7c72602015-06-08 16:50:16 +0200162static int slow_copyfile(const char *from, const char *to)
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -0200163{
Adrian Hunter9a17d722013-10-14 13:43:41 +0300164 int err = -1;
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -0200165 char *line = NULL;
166 size_t n;
167 FILE *from_fp = fopen(from, "r"), *to_fp;
168
169 if (from_fp == NULL)
170 goto out;
171
172 to_fp = fopen(to, "w");
173 if (to_fp == NULL)
174 goto out_fclose_from;
175
176 while (getline(&line, &n, from_fp) > 0)
177 if (fputs(line, to_fp) == EOF)
178 goto out_fclose_to;
179 err = 0;
180out_fclose_to:
181 fclose(to_fp);
182 free(line);
183out_fclose_from:
184 fclose(from_fp);
185out:
186 return err;
187}
188
Namhyung Kim9c9f5a22015-05-18 09:30:18 +0900189int copyfile_offset(int ifd, loff_t off_in, int ofd, loff_t off_out, u64 size)
190{
191 void *ptr;
192 loff_t pgoff;
193
194 pgoff = off_in & ~(page_size - 1);
195 off_in -= pgoff;
196
197 ptr = mmap(NULL, off_in + size, PROT_READ, MAP_PRIVATE, ifd, pgoff);
198 if (ptr == MAP_FAILED)
199 return -1;
200
201 while (size) {
202 ssize_t ret = pwrite(ofd, ptr + off_in, size, off_out);
203 if (ret < 0 && errno == EINTR)
204 continue;
205 if (ret <= 0)
206 break;
207
208 size -= ret;
209 off_in += ret;
210 off_out -= ret;
211 }
212 munmap(ptr, off_in + size);
213
214 return size ? -1 : 0;
215}
216
Adrian Hunter9a17d722013-10-14 13:43:41 +0300217int copyfile_mode(const char *from, const char *to, mode_t mode)
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200218{
219 int fromfd, tofd;
220 struct stat st;
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200221 int err = -1;
Milos Vyleteld7c72602015-06-08 16:50:16 +0200222 char *tmp = NULL, *ptr = NULL;
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200223
224 if (stat(from, &st))
225 goto out;
226
Milos Vyleteld7c72602015-06-08 16:50:16 +0200227 /* extra 'x' at the end is to reserve space for '.' */
228 if (asprintf(&tmp, "%s.XXXXXXx", to) < 0) {
229 tmp = NULL;
230 goto out;
231 }
232 ptr = strrchr(tmp, '/');
233 if (!ptr)
234 goto out;
235 ptr = memmove(ptr + 1, ptr, strlen(ptr) - 1);
236 *ptr = '.';
237
238 tofd = mkstemp(tmp);
239 if (tofd < 0)
240 goto out;
241
242 if (fchmod(tofd, mode))
243 goto out_close_to;
244
245 if (st.st_size == 0) { /* /proc? do it slowly... */
246 err = slow_copyfile(from, tmp);
247 goto out_close_to;
248 }
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -0200249
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200250 fromfd = open(from, O_RDONLY);
251 if (fromfd < 0)
Milos Vyleteld7c72602015-06-08 16:50:16 +0200252 goto out_close_to;
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200253
Namhyung Kim9c9f5a22015-05-18 09:30:18 +0900254 err = copyfile_offset(fromfd, 0, tofd, 0, st.st_size);
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200255
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200256 close(fromfd);
Milos Vyleteld7c72602015-06-08 16:50:16 +0200257out_close_to:
258 close(tofd);
259 if (!err)
260 err = link(tmp, to);
261 unlink(tmp);
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200262out:
Milos Vyleteld7c72602015-06-08 16:50:16 +0200263 free(tmp);
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200264 return err;
265}
Arnaldo Carvalho de Meloc82ee822010-05-14 14:19:35 -0300266
Adrian Hunter9a17d722013-10-14 13:43:41 +0300267int copyfile(const char *from, const char *to)
268{
269 return copyfile_mode(from, to, 0755);
270}
271
Arnaldo Carvalho de Meloc82ee822010-05-14 14:19:35 -0300272unsigned long convert_unit(unsigned long value, char *unit)
273{
274 *unit = ' ';
275
276 if (value > 1000) {
277 value /= 1000;
278 *unit = 'K';
279 }
280
281 if (value > 1000) {
282 value /= 1000;
283 *unit = 'M';
284 }
285
286 if (value > 1000) {
287 value /= 1000;
288 *unit = 'G';
289 }
290
291 return value;
292}
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200293
Jiri Olsabc3a5022013-11-28 11:30:16 +0100294static ssize_t ion(bool is_read, int fd, void *buf, size_t n)
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200295{
296 void *buf_start = buf;
Jiri Olsa838d1452013-11-28 11:30:15 +0100297 size_t left = n;
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200298
Jiri Olsa838d1452013-11-28 11:30:15 +0100299 while (left) {
Jiri Olsabc3a5022013-11-28 11:30:16 +0100300 ssize_t ret = is_read ? read(fd, buf, left) :
301 write(fd, buf, left);
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200302
Namhyung Kime148c762014-04-24 22:27:32 +0900303 if (ret < 0 && errno == EINTR)
304 continue;
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200305 if (ret <= 0)
306 return ret;
307
Jiri Olsa838d1452013-11-28 11:30:15 +0100308 left -= ret;
309 buf += ret;
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200310 }
311
Jiri Olsa838d1452013-11-28 11:30:15 +0100312 BUG_ON((size_t)(buf - buf_start) != n);
313 return n;
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200314}
Arnaldo Carvalho de Melo61e04b32012-04-19 13:15:24 -0300315
Jiri Olsabc3a5022013-11-28 11:30:16 +0100316/*
317 * Read exactly 'n' bytes or return an error.
318 */
319ssize_t readn(int fd, void *buf, size_t n)
320{
321 return ion(true, fd, buf, n);
322}
323
324/*
325 * Write exactly 'n' bytes or return an error.
326 */
327ssize_t writen(int fd, void *buf, size_t n)
328{
329 return ion(false, fd, buf, n);
330}
331
Arnaldo Carvalho de Melo61e04b32012-04-19 13:15:24 -0300332size_t hex_width(u64 v)
333{
334 size_t n = 1;
335
336 while ((v >>= 4))
337 ++n;
338
339 return n;
340}
Arnaldo Carvalho de Melodc4552b2012-08-07 23:32:05 -0300341
Jiri Olsab2aff5f2012-10-27 23:18:30 +0200342static int hex(char ch)
343{
344 if ((ch >= '0') && (ch <= '9'))
345 return ch - '0';
346 if ((ch >= 'a') && (ch <= 'f'))
347 return ch - 'a' + 10;
348 if ((ch >= 'A') && (ch <= 'F'))
349 return ch - 'A' + 10;
350 return -1;
351}
352
353/*
354 * While we find nice hex chars, build a long_val.
355 * Return number of chars processed.
356 */
357int hex2u64(const char *ptr, u64 *long_val)
358{
359 const char *p = ptr;
360 *long_val = 0;
361
362 while (*p) {
363 const int hex_val = hex(*p);
364
365 if (hex_val < 0)
366 break;
367
368 *long_val = (*long_val << 4) | hex_val;
369 p++;
370 }
371
372 return p - ptr;
373}
374
Arnaldo Carvalho de Melodc4552b2012-08-07 23:32:05 -0300375/* Obtain a backtrace and print it to stdout. */
Ingo Molnar89fe8082013-09-30 12:07:11 +0200376#ifdef HAVE_BACKTRACE_SUPPORT
Arnaldo Carvalho de Melodc4552b2012-08-07 23:32:05 -0300377void dump_stack(void)
378{
379 void *array[16];
380 size_t size = backtrace(array, ARRAY_SIZE(array));
381 char **strings = backtrace_symbols(array, size);
382 size_t i;
383
384 printf("Obtained %zd stack frames.\n", size);
385
386 for (i = 0; i < size; i++)
387 printf("%s\n", strings[i]);
388
389 free(strings);
390}
Irina Tirdeac9f08be2012-09-08 03:43:23 +0300391#else
392void dump_stack(void) {}
393#endif
David Ahern2c803e52013-01-14 10:48:01 -0700394
Arnaldo Carvalho de Melo07c1a0d2015-02-24 15:34:23 -0300395void sighandler_dump_stack(int sig)
396{
397 psignal(sig, "perf");
398 dump_stack();
Arnaldo Carvalho de Melo9daddf62015-12-11 16:43:57 -0300399 signal(sig, SIG_DFL);
400 raise(sig);
Arnaldo Carvalho de Melo07c1a0d2015-02-24 15:34:23 -0300401}
402
Namhyung Kim3b47abe2013-06-04 10:50:29 +0900403int parse_nsec_time(const char *str, u64 *ptime)
404{
405 u64 time_sec, time_nsec;
406 char *end;
407
408 time_sec = strtoul(str, &end, 10);
409 if (*end != '.' && *end != '\0')
410 return -1;
411
412 if (*end == '.') {
413 int i;
414 char nsec_buf[10];
415
416 if (strlen(++end) > 9)
417 return -1;
418
419 strncpy(nsec_buf, end, 9);
420 nsec_buf[9] = '\0';
421
422 /* make it nsec precision */
423 for (i = strlen(nsec_buf); i < 9; i++)
424 nsec_buf[i] = '0';
425
426 time_nsec = strtoul(nsec_buf, &end, 10);
427 if (*end != '\0')
428 return -1;
429 } else
430 time_nsec = 0;
431
432 *ptime = time_sec * NSEC_PER_SEC + time_nsec;
433 return 0;
434}
Jiri Olsa27050f52013-09-01 12:36:13 +0200435
436unsigned long parse_tag_value(const char *str, struct parse_tag *tags)
437{
438 struct parse_tag *i = tags;
439
440 while (i->tag) {
441 char *s;
442
443 s = strchr(str, i->tag);
444 if (s) {
445 unsigned long int value;
446 char *endptr;
447
448 value = strtoul(str, &endptr, 10);
449 if (s != endptr)
450 break;
451
Adrian Hunter56921be2013-10-22 10:34:17 +0300452 if (value > ULONG_MAX / i->mult)
453 break;
Jiri Olsa27050f52013-09-01 12:36:13 +0200454 value *= i->mult;
455 return value;
456 }
457 i++;
458 }
459
460 return (unsigned long) -1;
461}
Arnaldo Carvalho de Melo97a07f12013-10-17 16:33:43 -0300462
Kan Liang076a30c2015-08-06 15:44:52 -0400463int get_stack_size(const char *str, unsigned long *_size)
464{
465 char *endptr;
466 unsigned long size;
467 unsigned long max_size = round_down(USHRT_MAX, sizeof(u64));
468
469 size = strtoul(str, &endptr, 0);
470
471 do {
472 if (*endptr)
473 break;
474
475 size = round_up(size, sizeof(u64));
476 if (!size || size > max_size)
477 break;
478
479 *_size = size;
480 return 0;
481
482 } while (0);
483
484 pr_err("callchain: Incorrect stack dump size (max %ld): %s\n",
485 max_size, str);
486 return -1;
487}
488
489int parse_callchain_record(const char *arg, struct callchain_param *param)
490{
491 char *tok, *name, *saveptr = NULL;
492 char *buf;
493 int ret = -1;
494
495 /* We need buffer that we know we can write to. */
496 buf = malloc(strlen(arg) + 1);
497 if (!buf)
498 return -ENOMEM;
499
500 strcpy(buf, arg);
501
502 tok = strtok_r((char *)buf, ",", &saveptr);
503 name = tok ? : (char *)buf;
504
505 do {
506 /* Framepointer style */
507 if (!strncmp(name, "fp", sizeof("fp"))) {
508 if (!strtok_r(NULL, ",", &saveptr)) {
509 param->record_mode = CALLCHAIN_FP;
510 ret = 0;
511 } else
512 pr_err("callchain: No more arguments "
513 "needed for --call-graph fp\n");
514 break;
515
Kan Liang076a30c2015-08-06 15:44:52 -0400516 /* Dwarf style */
517 } else if (!strncmp(name, "dwarf", sizeof("dwarf"))) {
518 const unsigned long default_stack_dump_size = 8192;
519
520 ret = 0;
521 param->record_mode = CALLCHAIN_DWARF;
522 param->dump_size = default_stack_dump_size;
523
524 tok = strtok_r(NULL, ",", &saveptr);
525 if (tok) {
526 unsigned long size = 0;
527
528 ret = get_stack_size(tok, &size);
529 param->dump_size = size;
530 }
Kan Liang076a30c2015-08-06 15:44:52 -0400531 } else if (!strncmp(name, "lbr", sizeof("lbr"))) {
532 if (!strtok_r(NULL, ",", &saveptr)) {
533 param->record_mode = CALLCHAIN_LBR;
534 ret = 0;
535 } else
536 pr_err("callchain: No more arguments "
537 "needed for --call-graph lbr\n");
538 break;
539 } else {
540 pr_err("callchain: Unknown --call-graph option "
541 "value: %s\n", arg);
542 break;
543 }
544
545 } while (0);
546
547 free(buf);
548 return ret;
549}
550
Dongsheng Yange1a2b172013-12-06 17:25:51 -0500551const char *get_filename_for_perf_kvm(void)
552{
553 const char *filename;
554
555 if (perf_host && !perf_guest)
556 filename = strdup("perf.data.host");
557 else if (!perf_host && perf_guest)
558 filename = strdup("perf.data.guest");
559 else
560 filename = strdup("perf.data.kvm");
561
562 return filename;
563}
Adrian Hunter1a472452013-12-11 14:36:23 +0200564
565int perf_event_paranoid(void)
566{
Adrian Hunter1a472452013-12-11 14:36:23 +0200567 int value;
568
Arnaldo Carvalho de Meloce273092014-12-11 13:37:59 -0300569 if (sysctl__read_int("kernel/perf_event_paranoid", &value))
Adrian Hunter1a472452013-12-11 14:36:23 +0200570 return INT_MAX;
571
572 return value;
573}
Adrian Hunter71db07b2013-12-11 14:36:32 +0200574
575void mem_bswap_32(void *src, int byte_size)
576{
577 u32 *m = src;
578 while (byte_size > 0) {
579 *m = bswap_32(*m);
580 byte_size -= sizeof(u32);
581 ++m;
582 }
583}
584
585void mem_bswap_64(void *src, int byte_size)
586{
587 u64 *m = src;
588
589 while (byte_size > 0) {
590 *m = bswap_64(*m);
591 byte_size -= sizeof(u64);
592 ++m;
593 }
594}
Jiri Olsa63914ac2014-08-01 17:46:54 +0200595
596bool find_process(const char *name)
597{
598 size_t len = strlen(name);
599 DIR *dir;
600 struct dirent *d;
601 int ret = -1;
602
603 dir = opendir(procfs__mountpoint());
604 if (!dir)
Peter Senna Tschudinbf644562015-09-17 12:08:53 +0200605 return false;
Jiri Olsa63914ac2014-08-01 17:46:54 +0200606
607 /* Walk through the directory. */
608 while (ret && (d = readdir(dir)) != NULL) {
609 char path[PATH_MAX];
610 char *data;
611 size_t size;
612
613 if ((d->d_type != DT_DIR) ||
614 !strcmp(".", d->d_name) ||
615 !strcmp("..", d->d_name))
616 continue;
617
618 scnprintf(path, sizeof(path), "%s/%s/comm",
619 procfs__mountpoint(), d->d_name);
620
621 if (filename__read_str(path, &data, &size))
622 continue;
623
624 ret = strncmp(name, data, len);
625 free(data);
626 }
627
628 closedir(dir);
629 return ret ? false : true;
630}
Wang Nan07bc5c62015-11-06 13:55:35 +0000631
632int
633fetch_kernel_version(unsigned int *puint, char *str,
634 size_t str_size)
635{
636 struct utsname utsname;
637 int version, patchlevel, sublevel, err;
638
639 if (uname(&utsname))
640 return -1;
641
642 if (str && str_size) {
643 strncpy(str, utsname.release, str_size);
644 str[str_size - 1] = '\0';
645 }
646
647 err = sscanf(utsname.release, "%d.%d.%d",
648 &version, &patchlevel, &sublevel);
649
650 if (err != 3) {
651 pr_debug("Unablt to get kernel version from uname '%s'\n",
652 utsname.release);
653 return -1;
654 }
655
656 if (puint)
657 *puint = (version << 16) + (patchlevel << 8) + sublevel;
658 return 0;
659}
Namhyung Kim14cbfbe2016-01-07 20:41:53 +0900660
661const char *perf_tip(const char *dirpath)
662{
663 struct strlist *tips;
664 struct str_node *node;
665 char *tip = NULL;
666 struct strlist_config conf = {
Namhyung Kim34b7b0f2016-01-09 19:16:29 +0900667 .dirname = dirpath,
668 .file_only = true,
Namhyung Kim14cbfbe2016-01-07 20:41:53 +0900669 };
670
671 tips = strlist__new("tips.txt", &conf);
Namhyung Kim34b7b0f2016-01-09 19:16:29 +0900672 if (tips == NULL)
673 return errno == ENOENT ? NULL : "Tip: get more memory! ;-p";
674
675 if (strlist__nr_entries(tips) == 0)
Namhyung Kim14cbfbe2016-01-07 20:41:53 +0900676 goto out;
Namhyung Kim14cbfbe2016-01-07 20:41:53 +0900677
678 node = strlist__entry(tips, random() % strlist__nr_entries(tips));
679 if (asprintf(&tip, "Tip: %s", node->s) < 0)
680 tip = (char *)"Tip: get more memory! ;-)";
681
682out:
683 strlist__delete(tips);
684
685 return tip;
686}
Jiri Olsa40356722016-01-20 12:56:32 +0100687
688bool is_regular_file(const char *file)
689{
690 struct stat st;
691
692 if (stat(file, &st))
693 return false;
694
695 return S_ISREG(st.st_mode);
696}
Wang Nan37b20152016-01-25 09:56:13 +0000697
698int fetch_current_timestamp(char *buf, size_t sz)
699{
700 struct timeval tv;
701 struct tm tm;
702 char dt[32];
703
704 if (gettimeofday(&tv, NULL) || !localtime_r(&tv.tv_sec, &tm))
705 return -1;
706
707 if (!strftime(dt, sizeof(dt), "%Y%m%d%H%M%S", &tm))
708 return -1;
709
710 scnprintf(buf, sz, "%s%02u", dt, (unsigned)tv.tv_usec / 10000);
711
712 return 0;
713}
Wang Nanc339b1a2016-02-24 11:20:44 +0000714
715void print_binary(unsigned char *data, size_t len,
716 size_t bytes_per_line, print_binary_t printer,
717 void *extra)
718{
719 size_t i, j, mask;
720
721 if (!printer)
722 return;
723
724 bytes_per_line = roundup_pow_of_two(bytes_per_line);
725 mask = bytes_per_line - 1;
726
727 printer(BINARY_PRINT_DATA_BEGIN, 0, extra);
728 for (i = 0; i < len; i++) {
729 if ((i & mask) == 0) {
730 printer(BINARY_PRINT_LINE_BEGIN, -1, extra);
731 printer(BINARY_PRINT_ADDR, i, extra);
732 }
733
734 printer(BINARY_PRINT_NUM_DATA, data[i], extra);
735
736 if (((i & mask) == mask) || i == len - 1) {
737 for (j = 0; j < mask-(i & mask); j++)
738 printer(BINARY_PRINT_NUM_PAD, -1, extra);
739
740 printer(BINARY_PRINT_SEP, i, extra);
741 for (j = i & ~mask; j <= i; j++)
742 printer(BINARY_PRINT_CHAR_DATA, data[j], extra);
743 for (j = 0; j < mask-(i & mask); j++)
744 printer(BINARY_PRINT_CHAR_PAD, i, extra);
745 printer(BINARY_PRINT_LINE_END, -1, extra);
746 }
747 }
748 printer(BINARY_PRINT_DATA_END, -1, extra);
749}
Jiri Olsaaccaed22016-07-16 18:11:19 +0200750
751int is_printable_array(char *p, unsigned int len)
752{
753 unsigned int i;
754
755 if (!p || !len || p[len - 1] != 0)
756 return 0;
757
758 len--;
759
760 for (i = 0; i < len; i++) {
761 if (!isprint(p[i]) && !isspace(p[i]))
762 return 0;
763 }
764 return 1;
765}