blob: b7766c577b015d978fd3e9960c451692f81daa6e [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>
Jiri Olsa9398c482014-08-11 10:50:02 +020018#include <unistd.h>
Jiri Olsa23aadb12014-10-01 18:00:26 +020019#include "callchain.h"
Namhyung Kim14cbfbeb2016-01-07 20:41:53 +090020#include "strlist.h"
Jiri Olsa23aadb12014-10-01 18:00:26 +020021
22struct callchain_param callchain_param = {
Arnaldo Carvalho de Melodef02db2015-10-05 17:05:35 -030023 .mode = CHAIN_GRAPH_ABS,
Jiri Olsa23aadb12014-10-01 18:00:26 +020024 .min_percent = 0.5,
Namhyung Kim792aeaf2015-10-22 16:45:46 +090025 .order = ORDER_CALLEE,
Namhyung Kimf2af0082015-11-09 14:45:41 +090026 .key = CCKEY_FUNCTION,
27 .value = CCVAL_PERCENT,
Jiri Olsa23aadb12014-10-01 18:00:26 +020028};
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -020029
Joerg Roedel1aed2672012-01-04 17:54:20 +010030/*
31 * XXX We need to find a better place for these things...
32 */
Arnaldo Carvalho de Melo0c1fe6b2012-10-06 14:57:10 -030033unsigned int page_size;
Don Zickus2b1b7102014-05-30 16:10:05 -040034int cacheline_size;
Arnaldo Carvalho de Melo0c1fe6b2012-10-06 14:57:10 -030035
Arnaldo Carvalho de Melo0c6332e2012-12-13 16:43:04 -030036bool test_attr__enabled;
37
Joerg Roedel1aed2672012-01-04 17:54:20 +010038bool perf_host = true;
Joerg Roedelc4a7dca2012-02-10 18:05:05 +010039bool perf_guest = false;
Joerg Roedel1aed2672012-01-04 17:54:20 +010040
41void event_attr_init(struct perf_event_attr *attr)
42{
43 if (!perf_host)
44 attr->exclude_host = 1;
45 if (!perf_guest)
46 attr->exclude_guest = 1;
Stephane Eranian7e1ccd32012-02-09 16:12:38 +010047 /* to capture ABI version */
48 attr->size = sizeof(*attr);
Joerg Roedel1aed2672012-01-04 17:54:20 +010049}
50
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -020051int mkdir_p(char *path, mode_t mode)
52{
53 struct stat st;
54 int err;
55 char *d = path;
56
57 if (*d != '/')
58 return -1;
59
60 if (stat(path, &st) == 0)
61 return 0;
62
63 while (*++d == '/');
64
65 while ((d = strchr(d, '/'))) {
66 *d = '\0';
67 err = stat(path, &st) && mkdir(path, mode);
68 *d++ = '/';
69 if (err)
70 return -1;
71 while (*d == '/')
72 ++d;
73 }
74 return (stat(path, &st) && mkdir(path, mode)) ? -1 : 0;
75}
76
Namhyung Kim0b1de0be2015-05-18 09:30:17 +090077int rm_rf(char *path)
78{
79 DIR *dir;
80 int ret = 0;
81 struct dirent *d;
82 char namebuf[PATH_MAX];
83
84 dir = opendir(path);
85 if (dir == NULL)
86 return 0;
87
88 while ((d = readdir(dir)) != NULL && !ret) {
89 struct stat statbuf;
90
91 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
92 continue;
93
94 scnprintf(namebuf, sizeof(namebuf), "%s/%s",
95 path, d->d_name);
96
97 ret = stat(namebuf, &statbuf);
98 if (ret < 0) {
99 pr_debug("stat failed: %s\n", namebuf);
100 break;
101 }
102
103 if (S_ISREG(statbuf.st_mode))
104 ret = unlink(namebuf);
105 else if (S_ISDIR(statbuf.st_mode))
106 ret = rm_rf(namebuf);
107 else {
108 pr_debug("unknown file: %s\n", namebuf);
109 ret = -1;
110 }
111 }
112 closedir(dir);
113
114 if (ret < 0)
115 return ret;
116
117 return rmdir(path);
118}
119
Milos Vyleteld7c72602015-06-08 16:50:16 +0200120static int slow_copyfile(const char *from, const char *to)
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -0200121{
Adrian Hunter9a17d722013-10-14 13:43:41 +0300122 int err = -1;
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -0200123 char *line = NULL;
124 size_t n;
125 FILE *from_fp = fopen(from, "r"), *to_fp;
126
127 if (from_fp == NULL)
128 goto out;
129
130 to_fp = fopen(to, "w");
131 if (to_fp == NULL)
132 goto out_fclose_from;
133
134 while (getline(&line, &n, from_fp) > 0)
135 if (fputs(line, to_fp) == EOF)
136 goto out_fclose_to;
137 err = 0;
138out_fclose_to:
139 fclose(to_fp);
140 free(line);
141out_fclose_from:
142 fclose(from_fp);
143out:
144 return err;
145}
146
Namhyung Kim9c9f5a22015-05-18 09:30:18 +0900147int copyfile_offset(int ifd, loff_t off_in, int ofd, loff_t off_out, u64 size)
148{
149 void *ptr;
150 loff_t pgoff;
151
152 pgoff = off_in & ~(page_size - 1);
153 off_in -= pgoff;
154
155 ptr = mmap(NULL, off_in + size, PROT_READ, MAP_PRIVATE, ifd, pgoff);
156 if (ptr == MAP_FAILED)
157 return -1;
158
159 while (size) {
160 ssize_t ret = pwrite(ofd, ptr + off_in, size, off_out);
161 if (ret < 0 && errno == EINTR)
162 continue;
163 if (ret <= 0)
164 break;
165
166 size -= ret;
167 off_in += ret;
168 off_out -= ret;
169 }
170 munmap(ptr, off_in + size);
171
172 return size ? -1 : 0;
173}
174
Adrian Hunter9a17d722013-10-14 13:43:41 +0300175int copyfile_mode(const char *from, const char *to, mode_t mode)
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200176{
177 int fromfd, tofd;
178 struct stat st;
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200179 int err = -1;
Milos Vyleteld7c72602015-06-08 16:50:16 +0200180 char *tmp = NULL, *ptr = NULL;
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200181
182 if (stat(from, &st))
183 goto out;
184
Milos Vyleteld7c72602015-06-08 16:50:16 +0200185 /* extra 'x' at the end is to reserve space for '.' */
186 if (asprintf(&tmp, "%s.XXXXXXx", to) < 0) {
187 tmp = NULL;
188 goto out;
189 }
190 ptr = strrchr(tmp, '/');
191 if (!ptr)
192 goto out;
193 ptr = memmove(ptr + 1, ptr, strlen(ptr) - 1);
194 *ptr = '.';
195
196 tofd = mkstemp(tmp);
197 if (tofd < 0)
198 goto out;
199
200 if (fchmod(tofd, mode))
201 goto out_close_to;
202
203 if (st.st_size == 0) { /* /proc? do it slowly... */
204 err = slow_copyfile(from, tmp);
205 goto out_close_to;
206 }
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -0200207
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200208 fromfd = open(from, O_RDONLY);
209 if (fromfd < 0)
Milos Vyleteld7c72602015-06-08 16:50:16 +0200210 goto out_close_to;
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200211
Namhyung Kim9c9f5a22015-05-18 09:30:18 +0900212 err = copyfile_offset(fromfd, 0, tofd, 0, st.st_size);
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200213
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200214 close(fromfd);
Milos Vyleteld7c72602015-06-08 16:50:16 +0200215out_close_to:
216 close(tofd);
217 if (!err)
218 err = link(tmp, to);
219 unlink(tmp);
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200220out:
Milos Vyleteld7c72602015-06-08 16:50:16 +0200221 free(tmp);
Arnaldo Carvalho de Melo4cf40132009-12-27 21:37:06 -0200222 return err;
223}
Arnaldo Carvalho de Meloc82ee822010-05-14 14:19:35 -0300224
Adrian Hunter9a17d722013-10-14 13:43:41 +0300225int copyfile(const char *from, const char *to)
226{
227 return copyfile_mode(from, to, 0755);
228}
229
Arnaldo Carvalho de Meloc82ee822010-05-14 14:19:35 -0300230unsigned long convert_unit(unsigned long value, char *unit)
231{
232 *unit = ' ';
233
234 if (value > 1000) {
235 value /= 1000;
236 *unit = 'K';
237 }
238
239 if (value > 1000) {
240 value /= 1000;
241 *unit = 'M';
242 }
243
244 if (value > 1000) {
245 value /= 1000;
246 *unit = 'G';
247 }
248
249 return value;
250}
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200251
Jiri Olsabc3a5022013-11-28 11:30:16 +0100252static ssize_t ion(bool is_read, int fd, void *buf, size_t n)
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200253{
254 void *buf_start = buf;
Jiri Olsa838d1452013-11-28 11:30:15 +0100255 size_t left = n;
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200256
Jiri Olsa838d1452013-11-28 11:30:15 +0100257 while (left) {
Jiri Olsabc3a5022013-11-28 11:30:16 +0100258 ssize_t ret = is_read ? read(fd, buf, left) :
259 write(fd, buf, left);
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200260
Namhyung Kime148c762014-04-24 22:27:32 +0900261 if (ret < 0 && errno == EINTR)
262 continue;
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200263 if (ret <= 0)
264 return ret;
265
Jiri Olsa838d1452013-11-28 11:30:15 +0100266 left -= ret;
267 buf += ret;
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200268 }
269
Jiri Olsa838d1452013-11-28 11:30:15 +0100270 BUG_ON((size_t)(buf - buf_start) != n);
271 return n;
Arnaldo Carvalho de Melo1e7972c2011-01-03 16:50:55 -0200272}
Arnaldo Carvalho de Melo61e04b32012-04-19 13:15:24 -0300273
Jiri Olsabc3a5022013-11-28 11:30:16 +0100274/*
275 * Read exactly 'n' bytes or return an error.
276 */
277ssize_t readn(int fd, void *buf, size_t n)
278{
279 return ion(true, fd, buf, n);
280}
281
282/*
283 * Write exactly 'n' bytes or return an error.
284 */
285ssize_t writen(int fd, void *buf, size_t n)
286{
287 return ion(false, fd, buf, n);
288}
289
Arnaldo Carvalho de Melo61e04b32012-04-19 13:15:24 -0300290size_t hex_width(u64 v)
291{
292 size_t n = 1;
293
294 while ((v >>= 4))
295 ++n;
296
297 return n;
298}
Arnaldo Carvalho de Melodc4552b2012-08-07 23:32:05 -0300299
Jiri Olsab2aff5f2012-10-27 23:18:30 +0200300static int hex(char ch)
301{
302 if ((ch >= '0') && (ch <= '9'))
303 return ch - '0';
304 if ((ch >= 'a') && (ch <= 'f'))
305 return ch - 'a' + 10;
306 if ((ch >= 'A') && (ch <= 'F'))
307 return ch - 'A' + 10;
308 return -1;
309}
310
311/*
312 * While we find nice hex chars, build a long_val.
313 * Return number of chars processed.
314 */
315int hex2u64(const char *ptr, u64 *long_val)
316{
317 const char *p = ptr;
318 *long_val = 0;
319
320 while (*p) {
321 const int hex_val = hex(*p);
322
323 if (hex_val < 0)
324 break;
325
326 *long_val = (*long_val << 4) | hex_val;
327 p++;
328 }
329
330 return p - ptr;
331}
332
Arnaldo Carvalho de Melodc4552b2012-08-07 23:32:05 -0300333/* Obtain a backtrace and print it to stdout. */
Ingo Molnar89fe8082013-09-30 12:07:11 +0200334#ifdef HAVE_BACKTRACE_SUPPORT
Arnaldo Carvalho de Melodc4552b2012-08-07 23:32:05 -0300335void dump_stack(void)
336{
337 void *array[16];
338 size_t size = backtrace(array, ARRAY_SIZE(array));
339 char **strings = backtrace_symbols(array, size);
340 size_t i;
341
342 printf("Obtained %zd stack frames.\n", size);
343
344 for (i = 0; i < size; i++)
345 printf("%s\n", strings[i]);
346
347 free(strings);
348}
Irina Tirdeac9f08be2012-09-08 03:43:23 +0300349#else
350void dump_stack(void) {}
351#endif
David Ahern2c803e52013-01-14 10:48:01 -0700352
Arnaldo Carvalho de Melo07c1a0d2015-02-24 15:34:23 -0300353void sighandler_dump_stack(int sig)
354{
355 psignal(sig, "perf");
356 dump_stack();
Arnaldo Carvalho de Melo9daddf62015-12-11 16:43:57 -0300357 signal(sig, SIG_DFL);
358 raise(sig);
Arnaldo Carvalho de Melo07c1a0d2015-02-24 15:34:23 -0300359}
360
Namhyung Kim3b47abe2013-06-04 10:50:29 +0900361int parse_nsec_time(const char *str, u64 *ptime)
362{
363 u64 time_sec, time_nsec;
364 char *end;
365
366 time_sec = strtoul(str, &end, 10);
367 if (*end != '.' && *end != '\0')
368 return -1;
369
370 if (*end == '.') {
371 int i;
372 char nsec_buf[10];
373
374 if (strlen(++end) > 9)
375 return -1;
376
377 strncpy(nsec_buf, end, 9);
378 nsec_buf[9] = '\0';
379
380 /* make it nsec precision */
381 for (i = strlen(nsec_buf); i < 9; i++)
382 nsec_buf[i] = '0';
383
384 time_nsec = strtoul(nsec_buf, &end, 10);
385 if (*end != '\0')
386 return -1;
387 } else
388 time_nsec = 0;
389
390 *ptime = time_sec * NSEC_PER_SEC + time_nsec;
391 return 0;
392}
Jiri Olsa27050f52013-09-01 12:36:13 +0200393
394unsigned long parse_tag_value(const char *str, struct parse_tag *tags)
395{
396 struct parse_tag *i = tags;
397
398 while (i->tag) {
399 char *s;
400
401 s = strchr(str, i->tag);
402 if (s) {
403 unsigned long int value;
404 char *endptr;
405
406 value = strtoul(str, &endptr, 10);
407 if (s != endptr)
408 break;
409
Adrian Hunter56921be2013-10-22 10:34:17 +0300410 if (value > ULONG_MAX / i->mult)
411 break;
Jiri Olsa27050f52013-09-01 12:36:13 +0200412 value *= i->mult;
413 return value;
414 }
415 i++;
416 }
417
418 return (unsigned long) -1;
419}
Arnaldo Carvalho de Melo97a07f12013-10-17 16:33:43 -0300420
Kan Liang076a30c2015-08-06 15:44:52 -0400421int get_stack_size(const char *str, unsigned long *_size)
422{
423 char *endptr;
424 unsigned long size;
425 unsigned long max_size = round_down(USHRT_MAX, sizeof(u64));
426
427 size = strtoul(str, &endptr, 0);
428
429 do {
430 if (*endptr)
431 break;
432
433 size = round_up(size, sizeof(u64));
434 if (!size || size > max_size)
435 break;
436
437 *_size = size;
438 return 0;
439
440 } while (0);
441
442 pr_err("callchain: Incorrect stack dump size (max %ld): %s\n",
443 max_size, str);
444 return -1;
445}
446
447int parse_callchain_record(const char *arg, struct callchain_param *param)
448{
449 char *tok, *name, *saveptr = NULL;
450 char *buf;
451 int ret = -1;
452
453 /* We need buffer that we know we can write to. */
454 buf = malloc(strlen(arg) + 1);
455 if (!buf)
456 return -ENOMEM;
457
458 strcpy(buf, arg);
459
460 tok = strtok_r((char *)buf, ",", &saveptr);
461 name = tok ? : (char *)buf;
462
463 do {
464 /* Framepointer style */
465 if (!strncmp(name, "fp", sizeof("fp"))) {
466 if (!strtok_r(NULL, ",", &saveptr)) {
467 param->record_mode = CALLCHAIN_FP;
468 ret = 0;
469 } else
470 pr_err("callchain: No more arguments "
471 "needed for --call-graph fp\n");
472 break;
473
474#ifdef HAVE_DWARF_UNWIND_SUPPORT
475 /* Dwarf style */
476 } else if (!strncmp(name, "dwarf", sizeof("dwarf"))) {
477 const unsigned long default_stack_dump_size = 8192;
478
479 ret = 0;
480 param->record_mode = CALLCHAIN_DWARF;
481 param->dump_size = default_stack_dump_size;
482
483 tok = strtok_r(NULL, ",", &saveptr);
484 if (tok) {
485 unsigned long size = 0;
486
487 ret = get_stack_size(tok, &size);
488 param->dump_size = size;
489 }
490#endif /* HAVE_DWARF_UNWIND_SUPPORT */
491 } else if (!strncmp(name, "lbr", sizeof("lbr"))) {
492 if (!strtok_r(NULL, ",", &saveptr)) {
493 param->record_mode = CALLCHAIN_LBR;
494 ret = 0;
495 } else
496 pr_err("callchain: No more arguments "
497 "needed for --call-graph lbr\n");
498 break;
499 } else {
500 pr_err("callchain: Unknown --call-graph option "
501 "value: %s\n", arg);
502 break;
503 }
504
505 } while (0);
506
507 free(buf);
508 return ret;
509}
510
Dongsheng Yange1a2b172013-12-06 17:25:51 -0500511const char *get_filename_for_perf_kvm(void)
512{
513 const char *filename;
514
515 if (perf_host && !perf_guest)
516 filename = strdup("perf.data.host");
517 else if (!perf_host && perf_guest)
518 filename = strdup("perf.data.guest");
519 else
520 filename = strdup("perf.data.kvm");
521
522 return filename;
523}
Adrian Hunter1a472452013-12-11 14:36:23 +0200524
525int perf_event_paranoid(void)
526{
Adrian Hunter1a472452013-12-11 14:36:23 +0200527 int value;
528
Arnaldo Carvalho de Meloce273092014-12-11 13:37:59 -0300529 if (sysctl__read_int("kernel/perf_event_paranoid", &value))
Adrian Hunter1a472452013-12-11 14:36:23 +0200530 return INT_MAX;
531
532 return value;
533}
Adrian Hunter71db07b2013-12-11 14:36:32 +0200534
535void mem_bswap_32(void *src, int byte_size)
536{
537 u32 *m = src;
538 while (byte_size > 0) {
539 *m = bswap_32(*m);
540 byte_size -= sizeof(u32);
541 ++m;
542 }
543}
544
545void mem_bswap_64(void *src, int byte_size)
546{
547 u64 *m = src;
548
549 while (byte_size > 0) {
550 *m = bswap_64(*m);
551 byte_size -= sizeof(u64);
552 ++m;
553 }
554}
Jiri Olsa63914ac2014-08-01 17:46:54 +0200555
556bool find_process(const char *name)
557{
558 size_t len = strlen(name);
559 DIR *dir;
560 struct dirent *d;
561 int ret = -1;
562
563 dir = opendir(procfs__mountpoint());
564 if (!dir)
Peter Senna Tschudinbf644562015-09-17 12:08:53 +0200565 return false;
Jiri Olsa63914ac2014-08-01 17:46:54 +0200566
567 /* Walk through the directory. */
568 while (ret && (d = readdir(dir)) != NULL) {
569 char path[PATH_MAX];
570 char *data;
571 size_t size;
572
573 if ((d->d_type != DT_DIR) ||
574 !strcmp(".", d->d_name) ||
575 !strcmp("..", d->d_name))
576 continue;
577
578 scnprintf(path, sizeof(path), "%s/%s/comm",
579 procfs__mountpoint(), d->d_name);
580
581 if (filename__read_str(path, &data, &size))
582 continue;
583
584 ret = strncmp(name, data, len);
585 free(data);
586 }
587
588 closedir(dir);
589 return ret ? false : true;
590}
Wang Nan07bc5c62015-11-06 13:55:35 +0000591
592int
593fetch_kernel_version(unsigned int *puint, char *str,
594 size_t str_size)
595{
596 struct utsname utsname;
597 int version, patchlevel, sublevel, err;
598
599 if (uname(&utsname))
600 return -1;
601
602 if (str && str_size) {
603 strncpy(str, utsname.release, str_size);
604 str[str_size - 1] = '\0';
605 }
606
607 err = sscanf(utsname.release, "%d.%d.%d",
608 &version, &patchlevel, &sublevel);
609
610 if (err != 3) {
611 pr_debug("Unablt to get kernel version from uname '%s'\n",
612 utsname.release);
613 return -1;
614 }
615
616 if (puint)
617 *puint = (version << 16) + (patchlevel << 8) + sublevel;
618 return 0;
619}
Namhyung Kim14cbfbeb2016-01-07 20:41:53 +0900620
621const char *perf_tip(const char *dirpath)
622{
623 struct strlist *tips;
624 struct str_node *node;
625 char *tip = NULL;
626 struct strlist_config conf = {
Namhyung Kim34b7b0f2016-01-09 19:16:29 +0900627 .dirname = dirpath,
628 .file_only = true,
Namhyung Kim14cbfbeb2016-01-07 20:41:53 +0900629 };
630
631 tips = strlist__new("tips.txt", &conf);
Namhyung Kim34b7b0f2016-01-09 19:16:29 +0900632 if (tips == NULL)
633 return errno == ENOENT ? NULL : "Tip: get more memory! ;-p";
634
635 if (strlist__nr_entries(tips) == 0)
Namhyung Kim14cbfbeb2016-01-07 20:41:53 +0900636 goto out;
Namhyung Kim14cbfbeb2016-01-07 20:41:53 +0900637
638 node = strlist__entry(tips, random() % strlist__nr_entries(tips));
639 if (asprintf(&tip, "Tip: %s", node->s) < 0)
640 tip = (char *)"Tip: get more memory! ;-)";
641
642out:
643 strlist__delete(tips);
644
645 return tip;
646}
Jiri Olsa40356722016-01-20 12:56:32 +0100647
648bool is_regular_file(const char *file)
649{
650 struct stat st;
651
652 if (stat(file, &st))
653 return false;
654
655 return S_ISREG(st.st_mode);
656}
Wang Nan37b20152016-01-25 09:56:13 +0000657
658int fetch_current_timestamp(char *buf, size_t sz)
659{
660 struct timeval tv;
661 struct tm tm;
662 char dt[32];
663
664 if (gettimeofday(&tv, NULL) || !localtime_r(&tv.tv_sec, &tm))
665 return -1;
666
667 if (!strftime(dt, sizeof(dt), "%Y%m%d%H%M%S", &tm))
668 return -1;
669
670 scnprintf(buf, sz, "%s%02u", dt, (unsigned)tv.tv_usec / 10000);
671
672 return 0;
673}
Wang Nanc339b1a2016-02-24 11:20:44 +0000674
675void print_binary(unsigned char *data, size_t len,
676 size_t bytes_per_line, print_binary_t printer,
677 void *extra)
678{
679 size_t i, j, mask;
680
681 if (!printer)
682 return;
683
684 bytes_per_line = roundup_pow_of_two(bytes_per_line);
685 mask = bytes_per_line - 1;
686
687 printer(BINARY_PRINT_DATA_BEGIN, 0, extra);
688 for (i = 0; i < len; i++) {
689 if ((i & mask) == 0) {
690 printer(BINARY_PRINT_LINE_BEGIN, -1, extra);
691 printer(BINARY_PRINT_ADDR, i, extra);
692 }
693
694 printer(BINARY_PRINT_NUM_DATA, data[i], extra);
695
696 if (((i & mask) == mask) || i == len - 1) {
697 for (j = 0; j < mask-(i & mask); j++)
698 printer(BINARY_PRINT_NUM_PAD, -1, extra);
699
700 printer(BINARY_PRINT_SEP, i, extra);
701 for (j = i & ~mask; j <= i; j++)
702 printer(BINARY_PRINT_CHAR_DATA, data[j], extra);
703 for (j = 0; j < mask-(i & mask); j++)
704 printer(BINARY_PRINT_CHAR_PAD, i, extra);
705 printer(BINARY_PRINT_LINE_END, -1, extra);
706 }
707 }
708 printer(BINARY_PRINT_DATA_END, -1, extra);
709}