Joerg Roedel | 1aed267 | 2012-01-04 17:54:20 +0100 | [diff] [blame] | 1 | #include "../perf.h" |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 2 | #include "util.h" |
Jiri Olsa | 84f5d36 | 2014-07-14 23:46:48 +0200 | [diff] [blame] | 3 | #include "debug.h" |
Borislav Petkov | cd0cfad | 2013-12-09 17:14:24 +0100 | [diff] [blame] | 4 | #include <api/fs/fs.h> |
Frederic Weisbecker | 69e3f52 | 2010-01-16 14:21:15 +0100 | [diff] [blame] | 5 | #include <sys/mman.h> |
Wang Nan | 07bc5c6 | 2015-11-06 13:55:35 +0000 | [diff] [blame] | 6 | #include <sys/utsname.h> |
Ingo Molnar | 89fe808 | 2013-09-30 12:07:11 +0200 | [diff] [blame] | 7 | #ifdef HAVE_BACKTRACE_SUPPORT |
Arnaldo Carvalho de Melo | dc4552b | 2012-08-07 23:32:05 -0300 | [diff] [blame] | 8 | #include <execinfo.h> |
Irina Tirdea | c9f08be | 2012-09-08 03:43:23 +0300 | [diff] [blame] | 9 | #endif |
Arnaldo Carvalho de Melo | dc4552b | 2012-08-07 23:32:05 -0300 | [diff] [blame] | 10 | #include <stdio.h> |
| 11 | #include <stdlib.h> |
Jiri Olsa | cef82c9 | 2013-12-03 14:09:22 +0100 | [diff] [blame] | 12 | #include <string.h> |
| 13 | #include <errno.h> |
Adrian Hunter | 1a47245 | 2013-12-11 14:36:23 +0200 | [diff] [blame] | 14 | #include <limits.h> |
Adrian Hunter | 71db07b | 2013-12-11 14:36:32 +0200 | [diff] [blame] | 15 | #include <byteswap.h> |
Jiri Olsa | 838d145 | 2013-11-28 11:30:15 +0100 | [diff] [blame] | 16 | #include <linux/kernel.h> |
Jiri Olsa | 9398c48 | 2014-08-11 10:50:02 +0200 | [diff] [blame] | 17 | #include <unistd.h> |
Jiri Olsa | 23aadb1 | 2014-10-01 18:00:26 +0200 | [diff] [blame] | 18 | #include "callchain.h" |
| 19 | |
| 20 | struct callchain_param callchain_param = { |
Arnaldo Carvalho de Melo | def02db | 2015-10-05 17:05:35 -0300 | [diff] [blame] | 21 | .mode = CHAIN_GRAPH_ABS, |
Jiri Olsa | 23aadb1 | 2014-10-01 18:00:26 +0200 | [diff] [blame] | 22 | .min_percent = 0.5, |
Namhyung Kim | 792aeaf | 2015-10-22 16:45:46 +0900 | [diff] [blame] | 23 | .order = ORDER_CALLEE, |
Namhyung Kim | f2af008 | 2015-11-09 14:45:41 +0900 | [diff] [blame^] | 24 | .key = CCKEY_FUNCTION, |
| 25 | .value = CCVAL_PERCENT, |
Jiri Olsa | 23aadb1 | 2014-10-01 18:00:26 +0200 | [diff] [blame] | 26 | }; |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 27 | |
Joerg Roedel | 1aed267 | 2012-01-04 17:54:20 +0100 | [diff] [blame] | 28 | /* |
| 29 | * XXX We need to find a better place for these things... |
| 30 | */ |
Arnaldo Carvalho de Melo | 0c1fe6b | 2012-10-06 14:57:10 -0300 | [diff] [blame] | 31 | unsigned int page_size; |
Don Zickus | 2b1b710 | 2014-05-30 16:10:05 -0400 | [diff] [blame] | 32 | int cacheline_size; |
Arnaldo Carvalho de Melo | 0c1fe6b | 2012-10-06 14:57:10 -0300 | [diff] [blame] | 33 | |
Arnaldo Carvalho de Melo | 0c6332e | 2012-12-13 16:43:04 -0300 | [diff] [blame] | 34 | bool test_attr__enabled; |
| 35 | |
Joerg Roedel | 1aed267 | 2012-01-04 17:54:20 +0100 | [diff] [blame] | 36 | bool perf_host = true; |
Joerg Roedel | c4a7dca | 2012-02-10 18:05:05 +0100 | [diff] [blame] | 37 | bool perf_guest = false; |
Joerg Roedel | 1aed267 | 2012-01-04 17:54:20 +0100 | [diff] [blame] | 38 | |
| 39 | void event_attr_init(struct perf_event_attr *attr) |
| 40 | { |
| 41 | if (!perf_host) |
| 42 | attr->exclude_host = 1; |
| 43 | if (!perf_guest) |
| 44 | attr->exclude_guest = 1; |
Stephane Eranian | 7e1ccd3 | 2012-02-09 16:12:38 +0100 | [diff] [blame] | 45 | /* to capture ABI version */ |
| 46 | attr->size = sizeof(*attr); |
Joerg Roedel | 1aed267 | 2012-01-04 17:54:20 +0100 | [diff] [blame] | 47 | } |
| 48 | |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 49 | int mkdir_p(char *path, mode_t mode) |
| 50 | { |
| 51 | struct stat st; |
| 52 | int err; |
| 53 | char *d = path; |
| 54 | |
| 55 | if (*d != '/') |
| 56 | return -1; |
| 57 | |
| 58 | if (stat(path, &st) == 0) |
| 59 | return 0; |
| 60 | |
| 61 | while (*++d == '/'); |
| 62 | |
| 63 | while ((d = strchr(d, '/'))) { |
| 64 | *d = '\0'; |
| 65 | err = stat(path, &st) && mkdir(path, mode); |
| 66 | *d++ = '/'; |
| 67 | if (err) |
| 68 | return -1; |
| 69 | while (*d == '/') |
| 70 | ++d; |
| 71 | } |
| 72 | return (stat(path, &st) && mkdir(path, mode)) ? -1 : 0; |
| 73 | } |
| 74 | |
Namhyung Kim | 0b1de0be | 2015-05-18 09:30:17 +0900 | [diff] [blame] | 75 | int rm_rf(char *path) |
| 76 | { |
| 77 | DIR *dir; |
| 78 | int ret = 0; |
| 79 | struct dirent *d; |
| 80 | char namebuf[PATH_MAX]; |
| 81 | |
| 82 | dir = opendir(path); |
| 83 | if (dir == NULL) |
| 84 | return 0; |
| 85 | |
| 86 | while ((d = readdir(dir)) != NULL && !ret) { |
| 87 | struct stat statbuf; |
| 88 | |
| 89 | if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, "..")) |
| 90 | continue; |
| 91 | |
| 92 | scnprintf(namebuf, sizeof(namebuf), "%s/%s", |
| 93 | path, d->d_name); |
| 94 | |
| 95 | ret = stat(namebuf, &statbuf); |
| 96 | if (ret < 0) { |
| 97 | pr_debug("stat failed: %s\n", namebuf); |
| 98 | break; |
| 99 | } |
| 100 | |
| 101 | if (S_ISREG(statbuf.st_mode)) |
| 102 | ret = unlink(namebuf); |
| 103 | else if (S_ISDIR(statbuf.st_mode)) |
| 104 | ret = rm_rf(namebuf); |
| 105 | else { |
| 106 | pr_debug("unknown file: %s\n", namebuf); |
| 107 | ret = -1; |
| 108 | } |
| 109 | } |
| 110 | closedir(dir); |
| 111 | |
| 112 | if (ret < 0) |
| 113 | return ret; |
| 114 | |
| 115 | return rmdir(path); |
| 116 | } |
| 117 | |
Milos Vyletel | d7c7260 | 2015-06-08 16:50:16 +0200 | [diff] [blame] | 118 | static int slow_copyfile(const char *from, const char *to) |
Arnaldo Carvalho de Melo | 9e20144 | 2010-01-14 18:30:06 -0200 | [diff] [blame] | 119 | { |
Adrian Hunter | 9a17d72 | 2013-10-14 13:43:41 +0300 | [diff] [blame] | 120 | int err = -1; |
Arnaldo Carvalho de Melo | 9e20144 | 2010-01-14 18:30:06 -0200 | [diff] [blame] | 121 | char *line = NULL; |
| 122 | size_t n; |
| 123 | FILE *from_fp = fopen(from, "r"), *to_fp; |
| 124 | |
| 125 | if (from_fp == NULL) |
| 126 | goto out; |
| 127 | |
| 128 | to_fp = fopen(to, "w"); |
| 129 | if (to_fp == NULL) |
| 130 | goto out_fclose_from; |
| 131 | |
| 132 | while (getline(&line, &n, from_fp) > 0) |
| 133 | if (fputs(line, to_fp) == EOF) |
| 134 | goto out_fclose_to; |
| 135 | err = 0; |
| 136 | out_fclose_to: |
| 137 | fclose(to_fp); |
| 138 | free(line); |
| 139 | out_fclose_from: |
| 140 | fclose(from_fp); |
| 141 | out: |
| 142 | return err; |
| 143 | } |
| 144 | |
Namhyung Kim | 9c9f5a2 | 2015-05-18 09:30:18 +0900 | [diff] [blame] | 145 | int copyfile_offset(int ifd, loff_t off_in, int ofd, loff_t off_out, u64 size) |
| 146 | { |
| 147 | void *ptr; |
| 148 | loff_t pgoff; |
| 149 | |
| 150 | pgoff = off_in & ~(page_size - 1); |
| 151 | off_in -= pgoff; |
| 152 | |
| 153 | ptr = mmap(NULL, off_in + size, PROT_READ, MAP_PRIVATE, ifd, pgoff); |
| 154 | if (ptr == MAP_FAILED) |
| 155 | return -1; |
| 156 | |
| 157 | while (size) { |
| 158 | ssize_t ret = pwrite(ofd, ptr + off_in, size, off_out); |
| 159 | if (ret < 0 && errno == EINTR) |
| 160 | continue; |
| 161 | if (ret <= 0) |
| 162 | break; |
| 163 | |
| 164 | size -= ret; |
| 165 | off_in += ret; |
| 166 | off_out -= ret; |
| 167 | } |
| 168 | munmap(ptr, off_in + size); |
| 169 | |
| 170 | return size ? -1 : 0; |
| 171 | } |
| 172 | |
Adrian Hunter | 9a17d72 | 2013-10-14 13:43:41 +0300 | [diff] [blame] | 173 | int copyfile_mode(const char *from, const char *to, mode_t mode) |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 174 | { |
| 175 | int fromfd, tofd; |
| 176 | struct stat st; |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 177 | int err = -1; |
Milos Vyletel | d7c7260 | 2015-06-08 16:50:16 +0200 | [diff] [blame] | 178 | char *tmp = NULL, *ptr = NULL; |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 179 | |
| 180 | if (stat(from, &st)) |
| 181 | goto out; |
| 182 | |
Milos Vyletel | d7c7260 | 2015-06-08 16:50:16 +0200 | [diff] [blame] | 183 | /* extra 'x' at the end is to reserve space for '.' */ |
| 184 | if (asprintf(&tmp, "%s.XXXXXXx", to) < 0) { |
| 185 | tmp = NULL; |
| 186 | goto out; |
| 187 | } |
| 188 | ptr = strrchr(tmp, '/'); |
| 189 | if (!ptr) |
| 190 | goto out; |
| 191 | ptr = memmove(ptr + 1, ptr, strlen(ptr) - 1); |
| 192 | *ptr = '.'; |
| 193 | |
| 194 | tofd = mkstemp(tmp); |
| 195 | if (tofd < 0) |
| 196 | goto out; |
| 197 | |
| 198 | if (fchmod(tofd, mode)) |
| 199 | goto out_close_to; |
| 200 | |
| 201 | if (st.st_size == 0) { /* /proc? do it slowly... */ |
| 202 | err = slow_copyfile(from, tmp); |
| 203 | goto out_close_to; |
| 204 | } |
Arnaldo Carvalho de Melo | 9e20144 | 2010-01-14 18:30:06 -0200 | [diff] [blame] | 205 | |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 206 | fromfd = open(from, O_RDONLY); |
| 207 | if (fromfd < 0) |
Milos Vyletel | d7c7260 | 2015-06-08 16:50:16 +0200 | [diff] [blame] | 208 | goto out_close_to; |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 209 | |
Namhyung Kim | 9c9f5a2 | 2015-05-18 09:30:18 +0900 | [diff] [blame] | 210 | err = copyfile_offset(fromfd, 0, tofd, 0, st.st_size); |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 211 | |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 212 | close(fromfd); |
Milos Vyletel | d7c7260 | 2015-06-08 16:50:16 +0200 | [diff] [blame] | 213 | out_close_to: |
| 214 | close(tofd); |
| 215 | if (!err) |
| 216 | err = link(tmp, to); |
| 217 | unlink(tmp); |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 218 | out: |
Milos Vyletel | d7c7260 | 2015-06-08 16:50:16 +0200 | [diff] [blame] | 219 | free(tmp); |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 220 | return err; |
| 221 | } |
Arnaldo Carvalho de Melo | c82ee82 | 2010-05-14 14:19:35 -0300 | [diff] [blame] | 222 | |
Adrian Hunter | 9a17d72 | 2013-10-14 13:43:41 +0300 | [diff] [blame] | 223 | int copyfile(const char *from, const char *to) |
| 224 | { |
| 225 | return copyfile_mode(from, to, 0755); |
| 226 | } |
| 227 | |
Arnaldo Carvalho de Melo | c82ee82 | 2010-05-14 14:19:35 -0300 | [diff] [blame] | 228 | unsigned long convert_unit(unsigned long value, char *unit) |
| 229 | { |
| 230 | *unit = ' '; |
| 231 | |
| 232 | if (value > 1000) { |
| 233 | value /= 1000; |
| 234 | *unit = 'K'; |
| 235 | } |
| 236 | |
| 237 | if (value > 1000) { |
| 238 | value /= 1000; |
| 239 | *unit = 'M'; |
| 240 | } |
| 241 | |
| 242 | if (value > 1000) { |
| 243 | value /= 1000; |
| 244 | *unit = 'G'; |
| 245 | } |
| 246 | |
| 247 | return value; |
| 248 | } |
Arnaldo Carvalho de Melo | 1e7972c | 2011-01-03 16:50:55 -0200 | [diff] [blame] | 249 | |
Jiri Olsa | bc3a502 | 2013-11-28 11:30:16 +0100 | [diff] [blame] | 250 | static ssize_t ion(bool is_read, int fd, void *buf, size_t n) |
Arnaldo Carvalho de Melo | 1e7972c | 2011-01-03 16:50:55 -0200 | [diff] [blame] | 251 | { |
| 252 | void *buf_start = buf; |
Jiri Olsa | 838d145 | 2013-11-28 11:30:15 +0100 | [diff] [blame] | 253 | size_t left = n; |
Arnaldo Carvalho de Melo | 1e7972c | 2011-01-03 16:50:55 -0200 | [diff] [blame] | 254 | |
Jiri Olsa | 838d145 | 2013-11-28 11:30:15 +0100 | [diff] [blame] | 255 | while (left) { |
Jiri Olsa | bc3a502 | 2013-11-28 11:30:16 +0100 | [diff] [blame] | 256 | ssize_t ret = is_read ? read(fd, buf, left) : |
| 257 | write(fd, buf, left); |
Arnaldo Carvalho de Melo | 1e7972c | 2011-01-03 16:50:55 -0200 | [diff] [blame] | 258 | |
Namhyung Kim | e148c76 | 2014-04-24 22:27:32 +0900 | [diff] [blame] | 259 | if (ret < 0 && errno == EINTR) |
| 260 | continue; |
Arnaldo Carvalho de Melo | 1e7972c | 2011-01-03 16:50:55 -0200 | [diff] [blame] | 261 | if (ret <= 0) |
| 262 | return ret; |
| 263 | |
Jiri Olsa | 838d145 | 2013-11-28 11:30:15 +0100 | [diff] [blame] | 264 | left -= ret; |
| 265 | buf += ret; |
Arnaldo Carvalho de Melo | 1e7972c | 2011-01-03 16:50:55 -0200 | [diff] [blame] | 266 | } |
| 267 | |
Jiri Olsa | 838d145 | 2013-11-28 11:30:15 +0100 | [diff] [blame] | 268 | BUG_ON((size_t)(buf - buf_start) != n); |
| 269 | return n; |
Arnaldo Carvalho de Melo | 1e7972c | 2011-01-03 16:50:55 -0200 | [diff] [blame] | 270 | } |
Arnaldo Carvalho de Melo | 61e04b3 | 2012-04-19 13:15:24 -0300 | [diff] [blame] | 271 | |
Jiri Olsa | bc3a502 | 2013-11-28 11:30:16 +0100 | [diff] [blame] | 272 | /* |
| 273 | * Read exactly 'n' bytes or return an error. |
| 274 | */ |
| 275 | ssize_t readn(int fd, void *buf, size_t n) |
| 276 | { |
| 277 | return ion(true, fd, buf, n); |
| 278 | } |
| 279 | |
| 280 | /* |
| 281 | * Write exactly 'n' bytes or return an error. |
| 282 | */ |
| 283 | ssize_t writen(int fd, void *buf, size_t n) |
| 284 | { |
| 285 | return ion(false, fd, buf, n); |
| 286 | } |
| 287 | |
Arnaldo Carvalho de Melo | 61e04b3 | 2012-04-19 13:15:24 -0300 | [diff] [blame] | 288 | size_t hex_width(u64 v) |
| 289 | { |
| 290 | size_t n = 1; |
| 291 | |
| 292 | while ((v >>= 4)) |
| 293 | ++n; |
| 294 | |
| 295 | return n; |
| 296 | } |
Arnaldo Carvalho de Melo | dc4552b | 2012-08-07 23:32:05 -0300 | [diff] [blame] | 297 | |
Jiri Olsa | b2aff5f | 2012-10-27 23:18:30 +0200 | [diff] [blame] | 298 | static int hex(char ch) |
| 299 | { |
| 300 | if ((ch >= '0') && (ch <= '9')) |
| 301 | return ch - '0'; |
| 302 | if ((ch >= 'a') && (ch <= 'f')) |
| 303 | return ch - 'a' + 10; |
| 304 | if ((ch >= 'A') && (ch <= 'F')) |
| 305 | return ch - 'A' + 10; |
| 306 | return -1; |
| 307 | } |
| 308 | |
| 309 | /* |
| 310 | * While we find nice hex chars, build a long_val. |
| 311 | * Return number of chars processed. |
| 312 | */ |
| 313 | int hex2u64(const char *ptr, u64 *long_val) |
| 314 | { |
| 315 | const char *p = ptr; |
| 316 | *long_val = 0; |
| 317 | |
| 318 | while (*p) { |
| 319 | const int hex_val = hex(*p); |
| 320 | |
| 321 | if (hex_val < 0) |
| 322 | break; |
| 323 | |
| 324 | *long_val = (*long_val << 4) | hex_val; |
| 325 | p++; |
| 326 | } |
| 327 | |
| 328 | return p - ptr; |
| 329 | } |
| 330 | |
Arnaldo Carvalho de Melo | dc4552b | 2012-08-07 23:32:05 -0300 | [diff] [blame] | 331 | /* Obtain a backtrace and print it to stdout. */ |
Ingo Molnar | 89fe808 | 2013-09-30 12:07:11 +0200 | [diff] [blame] | 332 | #ifdef HAVE_BACKTRACE_SUPPORT |
Arnaldo Carvalho de Melo | dc4552b | 2012-08-07 23:32:05 -0300 | [diff] [blame] | 333 | void dump_stack(void) |
| 334 | { |
| 335 | void *array[16]; |
| 336 | size_t size = backtrace(array, ARRAY_SIZE(array)); |
| 337 | char **strings = backtrace_symbols(array, size); |
| 338 | size_t i; |
| 339 | |
| 340 | printf("Obtained %zd stack frames.\n", size); |
| 341 | |
| 342 | for (i = 0; i < size; i++) |
| 343 | printf("%s\n", strings[i]); |
| 344 | |
| 345 | free(strings); |
| 346 | } |
Irina Tirdea | c9f08be | 2012-09-08 03:43:23 +0300 | [diff] [blame] | 347 | #else |
| 348 | void dump_stack(void) {} |
| 349 | #endif |
David Ahern | 2c803e5 | 2013-01-14 10:48:01 -0700 | [diff] [blame] | 350 | |
Arnaldo Carvalho de Melo | 07c1a0d | 2015-02-24 15:34:23 -0300 | [diff] [blame] | 351 | void sighandler_dump_stack(int sig) |
| 352 | { |
| 353 | psignal(sig, "perf"); |
| 354 | dump_stack(); |
| 355 | exit(sig); |
| 356 | } |
| 357 | |
David Ahern | 2c803e5 | 2013-01-14 10:48:01 -0700 | [diff] [blame] | 358 | void get_term_dimensions(struct winsize *ws) |
| 359 | { |
| 360 | char *s = getenv("LINES"); |
| 361 | |
| 362 | if (s != NULL) { |
| 363 | ws->ws_row = atoi(s); |
| 364 | s = getenv("COLUMNS"); |
| 365 | if (s != NULL) { |
| 366 | ws->ws_col = atoi(s); |
| 367 | if (ws->ws_row && ws->ws_col) |
| 368 | return; |
| 369 | } |
| 370 | } |
| 371 | #ifdef TIOCGWINSZ |
| 372 | if (ioctl(1, TIOCGWINSZ, ws) == 0 && |
| 373 | ws->ws_row && ws->ws_col) |
| 374 | return; |
| 375 | #endif |
| 376 | ws->ws_row = 25; |
| 377 | ws->ws_col = 80; |
| 378 | } |
Borislav Petkov | 1355915 | 2013-02-20 16:32:31 +0100 | [diff] [blame] | 379 | |
Jiri Olsa | 9398c48 | 2014-08-11 10:50:02 +0200 | [diff] [blame] | 380 | void set_term_quiet_input(struct termios *old) |
| 381 | { |
| 382 | struct termios tc; |
| 383 | |
| 384 | tcgetattr(0, old); |
| 385 | tc = *old; |
| 386 | tc.c_lflag &= ~(ICANON | ECHO); |
| 387 | tc.c_cc[VMIN] = 0; |
| 388 | tc.c_cc[VTIME] = 0; |
| 389 | tcsetattr(0, TCSANOW, &tc); |
| 390 | } |
| 391 | |
Namhyung Kim | 3b47abe | 2013-06-04 10:50:29 +0900 | [diff] [blame] | 392 | int parse_nsec_time(const char *str, u64 *ptime) |
| 393 | { |
| 394 | u64 time_sec, time_nsec; |
| 395 | char *end; |
| 396 | |
| 397 | time_sec = strtoul(str, &end, 10); |
| 398 | if (*end != '.' && *end != '\0') |
| 399 | return -1; |
| 400 | |
| 401 | if (*end == '.') { |
| 402 | int i; |
| 403 | char nsec_buf[10]; |
| 404 | |
| 405 | if (strlen(++end) > 9) |
| 406 | return -1; |
| 407 | |
| 408 | strncpy(nsec_buf, end, 9); |
| 409 | nsec_buf[9] = '\0'; |
| 410 | |
| 411 | /* make it nsec precision */ |
| 412 | for (i = strlen(nsec_buf); i < 9; i++) |
| 413 | nsec_buf[i] = '0'; |
| 414 | |
| 415 | time_nsec = strtoul(nsec_buf, &end, 10); |
| 416 | if (*end != '\0') |
| 417 | return -1; |
| 418 | } else |
| 419 | time_nsec = 0; |
| 420 | |
| 421 | *ptime = time_sec * NSEC_PER_SEC + time_nsec; |
| 422 | return 0; |
| 423 | } |
Jiri Olsa | 27050f5 | 2013-09-01 12:36:13 +0200 | [diff] [blame] | 424 | |
| 425 | unsigned long parse_tag_value(const char *str, struct parse_tag *tags) |
| 426 | { |
| 427 | struct parse_tag *i = tags; |
| 428 | |
| 429 | while (i->tag) { |
| 430 | char *s; |
| 431 | |
| 432 | s = strchr(str, i->tag); |
| 433 | if (s) { |
| 434 | unsigned long int value; |
| 435 | char *endptr; |
| 436 | |
| 437 | value = strtoul(str, &endptr, 10); |
| 438 | if (s != endptr) |
| 439 | break; |
| 440 | |
Adrian Hunter | 56921be | 2013-10-22 10:34:17 +0300 | [diff] [blame] | 441 | if (value > ULONG_MAX / i->mult) |
| 442 | break; |
Jiri Olsa | 27050f5 | 2013-09-01 12:36:13 +0200 | [diff] [blame] | 443 | value *= i->mult; |
| 444 | return value; |
| 445 | } |
| 446 | i++; |
| 447 | } |
| 448 | |
| 449 | return (unsigned long) -1; |
| 450 | } |
Arnaldo Carvalho de Melo | 97a07f1 | 2013-10-17 16:33:43 -0300 | [diff] [blame] | 451 | |
Kan Liang | 076a30c | 2015-08-06 15:44:52 -0400 | [diff] [blame] | 452 | int get_stack_size(const char *str, unsigned long *_size) |
| 453 | { |
| 454 | char *endptr; |
| 455 | unsigned long size; |
| 456 | unsigned long max_size = round_down(USHRT_MAX, sizeof(u64)); |
| 457 | |
| 458 | size = strtoul(str, &endptr, 0); |
| 459 | |
| 460 | do { |
| 461 | if (*endptr) |
| 462 | break; |
| 463 | |
| 464 | size = round_up(size, sizeof(u64)); |
| 465 | if (!size || size > max_size) |
| 466 | break; |
| 467 | |
| 468 | *_size = size; |
| 469 | return 0; |
| 470 | |
| 471 | } while (0); |
| 472 | |
| 473 | pr_err("callchain: Incorrect stack dump size (max %ld): %s\n", |
| 474 | max_size, str); |
| 475 | return -1; |
| 476 | } |
| 477 | |
| 478 | int parse_callchain_record(const char *arg, struct callchain_param *param) |
| 479 | { |
| 480 | char *tok, *name, *saveptr = NULL; |
| 481 | char *buf; |
| 482 | int ret = -1; |
| 483 | |
| 484 | /* We need buffer that we know we can write to. */ |
| 485 | buf = malloc(strlen(arg) + 1); |
| 486 | if (!buf) |
| 487 | return -ENOMEM; |
| 488 | |
| 489 | strcpy(buf, arg); |
| 490 | |
| 491 | tok = strtok_r((char *)buf, ",", &saveptr); |
| 492 | name = tok ? : (char *)buf; |
| 493 | |
| 494 | do { |
| 495 | /* Framepointer style */ |
| 496 | if (!strncmp(name, "fp", sizeof("fp"))) { |
| 497 | if (!strtok_r(NULL, ",", &saveptr)) { |
| 498 | param->record_mode = CALLCHAIN_FP; |
| 499 | ret = 0; |
| 500 | } else |
| 501 | pr_err("callchain: No more arguments " |
| 502 | "needed for --call-graph fp\n"); |
| 503 | break; |
| 504 | |
| 505 | #ifdef HAVE_DWARF_UNWIND_SUPPORT |
| 506 | /* Dwarf style */ |
| 507 | } else if (!strncmp(name, "dwarf", sizeof("dwarf"))) { |
| 508 | const unsigned long default_stack_dump_size = 8192; |
| 509 | |
| 510 | ret = 0; |
| 511 | param->record_mode = CALLCHAIN_DWARF; |
| 512 | param->dump_size = default_stack_dump_size; |
| 513 | |
| 514 | tok = strtok_r(NULL, ",", &saveptr); |
| 515 | if (tok) { |
| 516 | unsigned long size = 0; |
| 517 | |
| 518 | ret = get_stack_size(tok, &size); |
| 519 | param->dump_size = size; |
| 520 | } |
| 521 | #endif /* HAVE_DWARF_UNWIND_SUPPORT */ |
| 522 | } else if (!strncmp(name, "lbr", sizeof("lbr"))) { |
| 523 | if (!strtok_r(NULL, ",", &saveptr)) { |
| 524 | param->record_mode = CALLCHAIN_LBR; |
| 525 | ret = 0; |
| 526 | } else |
| 527 | pr_err("callchain: No more arguments " |
| 528 | "needed for --call-graph lbr\n"); |
| 529 | break; |
| 530 | } else { |
| 531 | pr_err("callchain: Unknown --call-graph option " |
| 532 | "value: %s\n", arg); |
| 533 | break; |
| 534 | } |
| 535 | |
| 536 | } while (0); |
| 537 | |
| 538 | free(buf); |
| 539 | return ret; |
| 540 | } |
| 541 | |
Jiri Olsa | cef82c9 | 2013-12-03 14:09:22 +0100 | [diff] [blame] | 542 | int filename__read_str(const char *filename, char **buf, size_t *sizep) |
| 543 | { |
| 544 | size_t size = 0, alloc_size = 0; |
| 545 | void *bf = NULL, *nbf; |
| 546 | int fd, n, err = 0; |
Masami Hiramatsu | 6e81c74 | 2014-08-14 02:22:36 +0000 | [diff] [blame] | 547 | char sbuf[STRERR_BUFSIZE]; |
Jiri Olsa | cef82c9 | 2013-12-03 14:09:22 +0100 | [diff] [blame] | 548 | |
| 549 | fd = open(filename, O_RDONLY); |
| 550 | if (fd < 0) |
| 551 | return -errno; |
| 552 | |
| 553 | do { |
| 554 | if (size == alloc_size) { |
| 555 | alloc_size += BUFSIZ; |
| 556 | nbf = realloc(bf, alloc_size); |
| 557 | if (!nbf) { |
| 558 | err = -ENOMEM; |
| 559 | break; |
| 560 | } |
| 561 | |
| 562 | bf = nbf; |
| 563 | } |
| 564 | |
| 565 | n = read(fd, bf + size, alloc_size - size); |
| 566 | if (n < 0) { |
| 567 | if (size) { |
Masami Hiramatsu | 6e81c74 | 2014-08-14 02:22:36 +0000 | [diff] [blame] | 568 | pr_warning("read failed %d: %s\n", errno, |
| 569 | strerror_r(errno, sbuf, sizeof(sbuf))); |
Jiri Olsa | cef82c9 | 2013-12-03 14:09:22 +0100 | [diff] [blame] | 570 | err = 0; |
| 571 | } else |
| 572 | err = -errno; |
| 573 | |
| 574 | break; |
| 575 | } |
| 576 | |
| 577 | size += n; |
| 578 | } while (n > 0); |
| 579 | |
| 580 | if (!err) { |
| 581 | *sizep = size; |
| 582 | *buf = bf; |
| 583 | } else |
| 584 | free(bf); |
| 585 | |
| 586 | close(fd); |
| 587 | return err; |
| 588 | } |
Dongsheng Yang | e1a2b17 | 2013-12-06 17:25:51 -0500 | [diff] [blame] | 589 | |
| 590 | const char *get_filename_for_perf_kvm(void) |
| 591 | { |
| 592 | const char *filename; |
| 593 | |
| 594 | if (perf_host && !perf_guest) |
| 595 | filename = strdup("perf.data.host"); |
| 596 | else if (!perf_host && perf_guest) |
| 597 | filename = strdup("perf.data.guest"); |
| 598 | else |
| 599 | filename = strdup("perf.data.kvm"); |
| 600 | |
| 601 | return filename; |
| 602 | } |
Adrian Hunter | 1a47245 | 2013-12-11 14:36:23 +0200 | [diff] [blame] | 603 | |
| 604 | int perf_event_paranoid(void) |
| 605 | { |
Adrian Hunter | 1a47245 | 2013-12-11 14:36:23 +0200 | [diff] [blame] | 606 | int value; |
| 607 | |
Arnaldo Carvalho de Melo | ce27309 | 2014-12-11 13:37:59 -0300 | [diff] [blame] | 608 | if (sysctl__read_int("kernel/perf_event_paranoid", &value)) |
Adrian Hunter | 1a47245 | 2013-12-11 14:36:23 +0200 | [diff] [blame] | 609 | return INT_MAX; |
| 610 | |
| 611 | return value; |
| 612 | } |
Adrian Hunter | 71db07b | 2013-12-11 14:36:32 +0200 | [diff] [blame] | 613 | |
| 614 | void mem_bswap_32(void *src, int byte_size) |
| 615 | { |
| 616 | u32 *m = src; |
| 617 | while (byte_size > 0) { |
| 618 | *m = bswap_32(*m); |
| 619 | byte_size -= sizeof(u32); |
| 620 | ++m; |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | void mem_bswap_64(void *src, int byte_size) |
| 625 | { |
| 626 | u64 *m = src; |
| 627 | |
| 628 | while (byte_size > 0) { |
| 629 | *m = bswap_64(*m); |
| 630 | byte_size -= sizeof(u64); |
| 631 | ++m; |
| 632 | } |
| 633 | } |
Jiri Olsa | 63914ac | 2014-08-01 17:46:54 +0200 | [diff] [blame] | 634 | |
| 635 | bool find_process(const char *name) |
| 636 | { |
| 637 | size_t len = strlen(name); |
| 638 | DIR *dir; |
| 639 | struct dirent *d; |
| 640 | int ret = -1; |
| 641 | |
| 642 | dir = opendir(procfs__mountpoint()); |
| 643 | if (!dir) |
Peter Senna Tschudin | bf64456 | 2015-09-17 12:08:53 +0200 | [diff] [blame] | 644 | return false; |
Jiri Olsa | 63914ac | 2014-08-01 17:46:54 +0200 | [diff] [blame] | 645 | |
| 646 | /* Walk through the directory. */ |
| 647 | while (ret && (d = readdir(dir)) != NULL) { |
| 648 | char path[PATH_MAX]; |
| 649 | char *data; |
| 650 | size_t size; |
| 651 | |
| 652 | if ((d->d_type != DT_DIR) || |
| 653 | !strcmp(".", d->d_name) || |
| 654 | !strcmp("..", d->d_name)) |
| 655 | continue; |
| 656 | |
| 657 | scnprintf(path, sizeof(path), "%s/%s/comm", |
| 658 | procfs__mountpoint(), d->d_name); |
| 659 | |
| 660 | if (filename__read_str(path, &data, &size)) |
| 661 | continue; |
| 662 | |
| 663 | ret = strncmp(name, data, len); |
| 664 | free(data); |
| 665 | } |
| 666 | |
| 667 | closedir(dir); |
| 668 | return ret ? false : true; |
| 669 | } |
Wang Nan | 07bc5c6 | 2015-11-06 13:55:35 +0000 | [diff] [blame] | 670 | |
| 671 | int |
| 672 | fetch_kernel_version(unsigned int *puint, char *str, |
| 673 | size_t str_size) |
| 674 | { |
| 675 | struct utsname utsname; |
| 676 | int version, patchlevel, sublevel, err; |
| 677 | |
| 678 | if (uname(&utsname)) |
| 679 | return -1; |
| 680 | |
| 681 | if (str && str_size) { |
| 682 | strncpy(str, utsname.release, str_size); |
| 683 | str[str_size - 1] = '\0'; |
| 684 | } |
| 685 | |
| 686 | err = sscanf(utsname.release, "%d.%d.%d", |
| 687 | &version, &patchlevel, &sublevel); |
| 688 | |
| 689 | if (err != 3) { |
| 690 | pr_debug("Unablt to get kernel version from uname '%s'\n", |
| 691 | utsname.release); |
| 692 | return -1; |
| 693 | } |
| 694 | |
| 695 | if (puint) |
| 696 | *puint = (version << 16) + (patchlevel << 8) + sublevel; |
| 697 | return 0; |
| 698 | } |