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1#include "../perf.h"
2#include "util.h"
3#include <api/fs/fs.h>
4#include <sys/mman.h>
5#ifdef HAVE_BACKTRACE_SUPPORT
6#include <execinfo.h>
7#endif
8#include <stdio.h>
9#include <stdlib.h>
10#include <string.h>
11#include <errno.h>
12#include <limits.h>
13#include <byteswap.h>
14#include <linux/kernel.h>
15
16/*
17 * XXX We need to find a better place for these things...
18 */
19unsigned int page_size;
20
21bool test_attr__enabled;
22
23bool perf_host = true;
24bool perf_guest = false;
25
26char tracing_events_path[PATH_MAX + 1] = "/sys/kernel/debug/tracing/events";
27
28void event_attr_init(struct perf_event_attr *attr)
29{
30 if (!perf_host)
31 attr->exclude_host = 1;
32 if (!perf_guest)
33 attr->exclude_guest = 1;
34 /* to capture ABI version */
35 attr->size = sizeof(*attr);
36}
37
38int mkdir_p(char *path, mode_t mode)
39{
40 struct stat st;
41 int err;
42 char *d = path;
43
44 if (*d != '/')
45 return -1;
46
47 if (stat(path, &st) == 0)
48 return 0;
49
50 while (*++d == '/');
51
52 while ((d = strchr(d, '/'))) {
53 *d = '\0';
54 err = stat(path, &st) && mkdir(path, mode);
55 *d++ = '/';
56 if (err)
57 return -1;
58 while (*d == '/')
59 ++d;
60 }
61 return (stat(path, &st) && mkdir(path, mode)) ? -1 : 0;
62}
63
64static int slow_copyfile(const char *from, const char *to, mode_t mode)
65{
66 int err = -1;
67 char *line = NULL;
68 size_t n;
69 FILE *from_fp = fopen(from, "r"), *to_fp;
70 mode_t old_umask;
71
72 if (from_fp == NULL)
73 goto out;
74
75 old_umask = umask(mode ^ 0777);
76 to_fp = fopen(to, "w");
77 umask(old_umask);
78 if (to_fp == NULL)
79 goto out_fclose_from;
80
81 while (getline(&line, &n, from_fp) > 0)
82 if (fputs(line, to_fp) == EOF)
83 goto out_fclose_to;
84 err = 0;
85out_fclose_to:
86 fclose(to_fp);
87 free(line);
88out_fclose_from:
89 fclose(from_fp);
90out:
91 return err;
92}
93
94int copyfile_mode(const char *from, const char *to, mode_t mode)
95{
96 int fromfd, tofd;
97 struct stat st;
98 void *addr;
99 int err = -1;
100
101 if (stat(from, &st))
102 goto out;
103
104 if (st.st_size == 0) /* /proc? do it slowly... */
105 return slow_copyfile(from, to, mode);
106
107 fromfd = open(from, O_RDONLY);
108 if (fromfd < 0)
109 goto out;
110
111 tofd = creat(to, mode);
112 if (tofd < 0)
113 goto out_close_from;
114
115 addr = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fromfd, 0);
116 if (addr == MAP_FAILED)
117 goto out_close_to;
118
119 if (write(tofd, addr, st.st_size) == st.st_size)
120 err = 0;
121
122 munmap(addr, st.st_size);
123out_close_to:
124 close(tofd);
125 if (err)
126 unlink(to);
127out_close_from:
128 close(fromfd);
129out:
130 return err;
131}
132
133int copyfile(const char *from, const char *to)
134{
135 return copyfile_mode(from, to, 0755);
136}
137
138unsigned long convert_unit(unsigned long value, char *unit)
139{
140 *unit = ' ';
141
142 if (value > 1000) {
143 value /= 1000;
144 *unit = 'K';
145 }
146
147 if (value > 1000) {
148 value /= 1000;
149 *unit = 'M';
150 }
151
152 if (value > 1000) {
153 value /= 1000;
154 *unit = 'G';
155 }
156
157 return value;
158}
159
160static ssize_t ion(bool is_read, int fd, void *buf, size_t n)
161{
162 void *buf_start = buf;
163 size_t left = n;
164
165 while (left) {
166 ssize_t ret = is_read ? read(fd, buf, left) :
167 write(fd, buf, left);
168
169 if (ret <= 0)
170 return ret;
171
172 left -= ret;
173 buf += ret;
174 }
175
176 BUG_ON((size_t)(buf - buf_start) != n);
177 return n;
178}
179
180/*
181 * Read exactly 'n' bytes or return an error.
182 */
183ssize_t readn(int fd, void *buf, size_t n)
184{
185 return ion(true, fd, buf, n);
186}
187
188/*
189 * Write exactly 'n' bytes or return an error.
190 */
191ssize_t writen(int fd, void *buf, size_t n)
192{
193 return ion(false, fd, buf, n);
194}
195
196size_t hex_width(u64 v)
197{
198 size_t n = 1;
199
200 while ((v >>= 4))
201 ++n;
202
203 return n;
204}
205
206static int hex(char ch)
207{
208 if ((ch >= '0') && (ch <= '9'))
209 return ch - '0';
210 if ((ch >= 'a') && (ch <= 'f'))
211 return ch - 'a' + 10;
212 if ((ch >= 'A') && (ch <= 'F'))
213 return ch - 'A' + 10;
214 return -1;
215}
216
217/*
218 * While we find nice hex chars, build a long_val.
219 * Return number of chars processed.
220 */
221int hex2u64(const char *ptr, u64 *long_val)
222{
223 const char *p = ptr;
224 *long_val = 0;
225
226 while (*p) {
227 const int hex_val = hex(*p);
228
229 if (hex_val < 0)
230 break;
231
232 *long_val = (*long_val << 4) | hex_val;
233 p++;
234 }
235
236 return p - ptr;
237}
238
239/* Obtain a backtrace and print it to stdout. */
240#ifdef HAVE_BACKTRACE_SUPPORT
241void dump_stack(void)
242{
243 void *array[16];
244 size_t size = backtrace(array, ARRAY_SIZE(array));
245 char **strings = backtrace_symbols(array, size);
246 size_t i;
247
248 printf("Obtained %zd stack frames.\n", size);
249
250 for (i = 0; i < size; i++)
251 printf("%s\n", strings[i]);
252
253 free(strings);
254}
255#else
256void dump_stack(void) {}
257#endif
258
259void get_term_dimensions(struct winsize *ws)
260{
261 char *s = getenv("LINES");
262
263 if (s != NULL) {
264 ws->ws_row = atoi(s);
265 s = getenv("COLUMNS");
266 if (s != NULL) {
267 ws->ws_col = atoi(s);
268 if (ws->ws_row && ws->ws_col)
269 return;
270 }
271 }
272#ifdef TIOCGWINSZ
273 if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
274 ws->ws_row && ws->ws_col)
275 return;
276#endif
277 ws->ws_row = 25;
278 ws->ws_col = 80;
279}
280
281static void set_tracing_events_path(const char *mountpoint)
282{
283 snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s",
284 mountpoint, "tracing/events");
285}
286
287const char *perf_debugfs_mount(const char *mountpoint)
288{
289 const char *mnt;
290
291 mnt = debugfs_mount(mountpoint);
292 if (!mnt)
293 return NULL;
294
295 set_tracing_events_path(mnt);
296
297 return mnt;
298}
299
300void perf_debugfs_set_path(const char *mntpt)
301{
302 snprintf(debugfs_mountpoint, strlen(debugfs_mountpoint), "%s", mntpt);
303 set_tracing_events_path(mntpt);
304}
305
306static const char *find_debugfs(void)
307{
308 const char *path = perf_debugfs_mount(NULL);
309
310 if (!path)
311 fprintf(stderr, "Your kernel does not support the debugfs filesystem");
312
313 return path;
314}
315
316/*
317 * Finds the path to the debugfs/tracing
318 * Allocates the string and stores it.
319 */
320const char *find_tracing_dir(void)
321{
322 static char *tracing;
323 static int tracing_found;
324 const char *debugfs;
325
326 if (tracing_found)
327 return tracing;
328
329 debugfs = find_debugfs();
330 if (!debugfs)
331 return NULL;
332
333 tracing = malloc(strlen(debugfs) + 9);
334 if (!tracing)
335 return NULL;
336
337 sprintf(tracing, "%s/tracing", debugfs);
338
339 tracing_found = 1;
340 return tracing;
341}
342
343char *get_tracing_file(const char *name)
344{
345 const char *tracing;
346 char *file;
347
348 tracing = find_tracing_dir();
349 if (!tracing)
350 return NULL;
351
352 file = malloc(strlen(tracing) + strlen(name) + 2);
353 if (!file)
354 return NULL;
355
356 sprintf(file, "%s/%s", tracing, name);
357 return file;
358}
359
360void put_tracing_file(char *file)
361{
362 free(file);
363}
364
365int parse_nsec_time(const char *str, u64 *ptime)
366{
367 u64 time_sec, time_nsec;
368 char *end;
369
370 time_sec = strtoul(str, &end, 10);
371 if (*end != '.' && *end != '\0')
372 return -1;
373
374 if (*end == '.') {
375 int i;
376 char nsec_buf[10];
377
378 if (strlen(++end) > 9)
379 return -1;
380
381 strncpy(nsec_buf, end, 9);
382 nsec_buf[9] = '\0';
383
384 /* make it nsec precision */
385 for (i = strlen(nsec_buf); i < 9; i++)
386 nsec_buf[i] = '0';
387
388 time_nsec = strtoul(nsec_buf, &end, 10);
389 if (*end != '\0')
390 return -1;
391 } else
392 time_nsec = 0;
393
394 *ptime = time_sec * NSEC_PER_SEC + time_nsec;
395 return 0;
396}
397
398unsigned long parse_tag_value(const char *str, struct parse_tag *tags)
399{
400 struct parse_tag *i = tags;
401
402 while (i->tag) {
403 char *s;
404
405 s = strchr(str, i->tag);
406 if (s) {
407 unsigned long int value;
408 char *endptr;
409
410 value = strtoul(str, &endptr, 10);
411 if (s != endptr)
412 break;
413
414 if (value > ULONG_MAX / i->mult)
415 break;
416 value *= i->mult;
417 return value;
418 }
419 i++;
420 }
421
422 return (unsigned long) -1;
423}
424
425int filename__read_int(const char *filename, int *value)
426{
427 char line[64];
428 int fd = open(filename, O_RDONLY), err = -1;
429
430 if (fd < 0)
431 return -1;
432
433 if (read(fd, line, sizeof(line)) > 0) {
434 *value = atoi(line);
435 err = 0;
436 }
437
438 close(fd);
439 return err;
440}
441
442int filename__read_str(const char *filename, char **buf, size_t *sizep)
443{
444 size_t size = 0, alloc_size = 0;
445 void *bf = NULL, *nbf;
446 int fd, n, err = 0;
447
448 fd = open(filename, O_RDONLY);
449 if (fd < 0)
450 return -errno;
451
452 do {
453 if (size == alloc_size) {
454 alloc_size += BUFSIZ;
455 nbf = realloc(bf, alloc_size);
456 if (!nbf) {
457 err = -ENOMEM;
458 break;
459 }
460
461 bf = nbf;
462 }
463
464 n = read(fd, bf + size, alloc_size - size);
465 if (n < 0) {
466 if (size) {
467 pr_warning("read failed %d: %s\n",
468 errno, strerror(errno));
469 err = 0;
470 } else
471 err = -errno;
472
473 break;
474 }
475
476 size += n;
477 } while (n > 0);
478
479 if (!err) {
480 *sizep = size;
481 *buf = bf;
482 } else
483 free(bf);
484
485 close(fd);
486 return err;
487}
488
489const char *get_filename_for_perf_kvm(void)
490{
491 const char *filename;
492
493 if (perf_host && !perf_guest)
494 filename = strdup("perf.data.host");
495 else if (!perf_host && perf_guest)
496 filename = strdup("perf.data.guest");
497 else
498 filename = strdup("perf.data.kvm");
499
500 return filename;
501}
502
503int perf_event_paranoid(void)
504{
505 char path[PATH_MAX];
506 const char *procfs = procfs__mountpoint();
507 int value;
508
509 if (!procfs)
510 return INT_MAX;
511
512 scnprintf(path, PATH_MAX, "%s/sys/kernel/perf_event_paranoid", procfs);
513
514 if (filename__read_int(path, &value))
515 return INT_MAX;
516
517 return value;
518}
519
520void mem_bswap_32(void *src, int byte_size)
521{
522 u32 *m = src;
523 while (byte_size > 0) {
524 *m = bswap_32(*m);
525 byte_size -= sizeof(u32);
526 ++m;
527 }
528}
529
530void mem_bswap_64(void *src, int byte_size)
531{
532 u64 *m = src;
533
534 while (byte_size > 0) {
535 *m = bswap_64(*m);
536 byte_size -= sizeof(u64);
537 ++m;
538 }
539}
1#include "../perf.h"
2#include "util.h"
3#include "debug.h"
4#include <api/fs/fs.h>
5#include <sys/mman.h>
6#include <sys/utsname.h>
7#ifdef HAVE_BACKTRACE_SUPPORT
8#include <execinfo.h>
9#endif
10#include <stdio.h>
11#include <stdlib.h>
12#include <string.h>
13#include <errno.h>
14#include <limits.h>
15#include <byteswap.h>
16#include <linux/kernel.h>
17#include <linux/log2.h>
18#include <unistd.h>
19#include "callchain.h"
20#include "strlist.h"
21
22struct callchain_param callchain_param = {
23 .mode = CHAIN_GRAPH_ABS,
24 .min_percent = 0.5,
25 .order = ORDER_CALLEE,
26 .key = CCKEY_FUNCTION,
27 .value = CCVAL_PERCENT,
28};
29
30/*
31 * XXX We need to find a better place for these things...
32 */
33unsigned int page_size;
34int cacheline_size;
35
36bool test_attr__enabled;
37
38bool perf_host = true;
39bool perf_guest = false;
40
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;
47 /* to capture ABI version */
48 attr->size = sizeof(*attr);
49}
50
51int 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
77int 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
120static int slow_copyfile(const char *from, const char *to)
121{
122 int err = -1;
123 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
147int 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
175int copyfile_mode(const char *from, const char *to, mode_t mode)
176{
177 int fromfd, tofd;
178 struct stat st;
179 int err = -1;
180 char *tmp = NULL, *ptr = NULL;
181
182 if (stat(from, &st))
183 goto out;
184
185 /* 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 }
207
208 fromfd = open(from, O_RDONLY);
209 if (fromfd < 0)
210 goto out_close_to;
211
212 err = copyfile_offset(fromfd, 0, tofd, 0, st.st_size);
213
214 close(fromfd);
215out_close_to:
216 close(tofd);
217 if (!err)
218 err = link(tmp, to);
219 unlink(tmp);
220out:
221 free(tmp);
222 return err;
223}
224
225int copyfile(const char *from, const char *to)
226{
227 return copyfile_mode(from, to, 0755);
228}
229
230unsigned 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}
251
252static ssize_t ion(bool is_read, int fd, void *buf, size_t n)
253{
254 void *buf_start = buf;
255 size_t left = n;
256
257 while (left) {
258 ssize_t ret = is_read ? read(fd, buf, left) :
259 write(fd, buf, left);
260
261 if (ret < 0 && errno == EINTR)
262 continue;
263 if (ret <= 0)
264 return ret;
265
266 left -= ret;
267 buf += ret;
268 }
269
270 BUG_ON((size_t)(buf - buf_start) != n);
271 return n;
272}
273
274/*
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
290size_t hex_width(u64 v)
291{
292 size_t n = 1;
293
294 while ((v >>= 4))
295 ++n;
296
297 return n;
298}
299
300static 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
333/* Obtain a backtrace and print it to stdout. */
334#ifdef HAVE_BACKTRACE_SUPPORT
335void 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}
349#else
350void dump_stack(void) {}
351#endif
352
353void sighandler_dump_stack(int sig)
354{
355 psignal(sig, "perf");
356 dump_stack();
357 signal(sig, SIG_DFL);
358 raise(sig);
359}
360
361int 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}
393
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
410 if (value > ULONG_MAX / i->mult)
411 break;
412 value *= i->mult;
413 return value;
414 }
415 i++;
416 }
417
418 return (unsigned long) -1;
419}
420
421int 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
511const 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}
524
525int perf_event_paranoid(void)
526{
527 int value;
528
529 if (sysctl__read_int("kernel/perf_event_paranoid", &value))
530 return INT_MAX;
531
532 return value;
533}
534
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}
555
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)
565 return false;
566
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}
591
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}
620
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 = {
627 .dirname = dirpath,
628 .file_only = true,
629 };
630
631 tips = strlist__new("tips.txt", &conf);
632 if (tips == NULL)
633 return errno == ENOENT ? NULL : "Tip: get more memory! ;-p";
634
635 if (strlist__nr_entries(tips) == 0)
636 goto out;
637
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}
647
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}
657
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}
674
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}