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