projects / lttng-tools.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Fix: error handling in lttng enable-event
[lttng-tools.git] / src / bin / lttng / commands / enable_events.c
CommitLineData
f3ed775e
DG		 1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
d14d33bf
AM		 4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
f3ed775e
DG		 7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
d14d33bf
AM		 13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
f3ed775e
DG		 16 */
17
18#define _GNU_SOURCE
19#include <popt.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <sys/stat.h>
24#include <sys/types.h>
25#include <unistd.h>
5a0de755 26#include <inttypes.h>
8f0d098b 27#include <ctype.h>
f3ed775e 28
c399183f 29#include "../command.h"
42224349 30#include <src/common/sessiond-comm/sessiond-comm.h>
f3ed775e
DG		 31
32static char *opt_event_list;
33static int opt_event_type;
0cda4f28
MD		 34static const char *opt_loglevel;
35static int opt_loglevel_type;
6181537c 36static int opt_kernel;
5440dc42 37static char *opt_session_name;
f3ed775e
DG		 38static int opt_userspace;
39static int opt_enable_all;
cf0e5467 40static char *opt_probe;
8f0d098b
MD		 41static char *opt_function;
42static char *opt_function_entry_symbol;
f3ed775e 43static char *opt_channel_name;
d78d6610
DG		 44#if 0
45/* Not implemented yet */
46static char *opt_cmd_name;
47static pid_t opt_pid;
48#endif
f3ed775e
DG		 49
50enum {
51 OPT_HELP = 1,
f3ed775e 52 OPT_TRACEPOINT,
cf0e5467 53 OPT_PROBE,
f3ed775e 54 OPT_FUNCTION,
8f0d098b 55 OPT_FUNCTION_ENTRY,
a54bd42d 56 OPT_SYSCALL,
eeac7d46 57 OPT_USERSPACE,
0cda4f28
MD		 58 OPT_LOGLEVEL,
59 OPT_LOGLEVEL_ONLY,
679b4943 60 OPT_LIST_OPTIONS,
f3ed775e
DG		 61};
62
cd80958d
DG		 63static struct lttng_handle *handle;
64
f3ed775e
DG		 65static struct poptOption long_options[] = {
66 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
67 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42 68 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
e14f64a8 69 {"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
f3ed775e
DG		 70 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
71 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
d78d6610
DG		 72#if 0
73 /* Not implemented yet */
40e9d5d3 74 {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
f3ed775e 75 {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
d78d6610
DG		 76#else
77 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
78#endif
f3ed775e 79 {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
7ebae521 80 {"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
40e9d5d3 81 {"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
b213d387
MD		 82#if 0
83 /*
84 * Currently removed from lttng kernel tracer. Removed from
85 * lttng UI to discourage its use.
86 */
40e9d5d3 87 {"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
b213d387 88#endif
7ebae521 89 {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
0cda4f28
MD		 90 {"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0},
91 {"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0},
679b4943 92 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
f3ed775e
DG		 93 {0, 0, 0, 0, 0, 0, 0}
94};
95
96/*
97 * usage
98 */
99static void usage(FILE *ofp)
100{
101 fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
102 fprintf(ofp, "\n");
103 fprintf(ofp, " -h, --help Show this help\n");
679b4943 104 fprintf(ofp, " --list-options Simple listing of options\n");
27221701
DG		 105 fprintf(ofp, " -s, --session Apply to session name\n");
106 fprintf(ofp, " -c, --channel Apply to this channel\n");
e08bff8d 107 fprintf(ofp, " -a, --all Enable all tracepoints and syscalls\n");
f3ed775e 108 fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
d78d6610 109#if 0
27221701 110 fprintf(ofp, " -u, --userspace [CMD] Apply to the user-space tracer\n");
e14f64a8
DG		 111 fprintf(ofp, " If no CMD, the domain used is UST global\n");
112 fprintf(ofp, " or else the domain is UST EXEC_NAME\n");
113 fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n");
d78d6610 114#else
27221701 115 fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
d78d6610 116#endif
f3ed775e
DG		 117 fprintf(ofp, "\n");
118 fprintf(ofp, "Event options:\n");
119 fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
be49af1e
MD		 120 fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
121 fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
122 fprintf(ofp, " e.g.:\n");
123 fprintf(ofp, " \"*\"\n");
124 fprintf(ofp, " \"app_component:na*\"\n");
8f0d098b 125 fprintf(ofp, " --probe [addr | symbol | symbol+offset]\n");
cf0e5467
MD		 126 fprintf(ofp, " Dynamic probe.\n");
127 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
128 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
8f0d098b
MD		 129 fprintf(ofp, " --function [addr | symbol | symbol+offset]\n");
130 fprintf(ofp, " Dynamic function entry/return probe.\n");
131 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
132 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
b213d387 133#if 0
8f0d098b
MD		 134 fprintf(ofp, " --function:entry symbol\n");
135 fprintf(ofp, " Function tracer event\n");
b213d387 136#endif
a54bd42d 137 fprintf(ofp, " --syscall System call event\n");
f3ed775e 138 fprintf(ofp, "\n");
300b8fd5
MD		 139 fprintf(ofp, " --loglevel name\n");
140 fprintf(ofp, " Tracepoint loglevel range from 0 to loglevel\n");
141 fprintf(ofp, " --loglevel-only name\n");
142 fprintf(ofp, " Tracepoint loglevel (only this loglevel)\n");
143 fprintf(ofp, "\n");
0c8477c8
MD		 144 fprintf(ofp, " The loglevel or loglevel-only options should be\n");
145 fprintf(ofp, " combined with a tracepoint name or tracepoint\n");
146 fprintf(ofp, " wildcard.\n");
147 fprintf(ofp, " Available loglevels:\n");
148 fprintf(ofp, " (higher value is more verbose)\n");
46839cc2
MD		 149 fprintf(ofp, " TRACE_EMERG = 0\n");
150 fprintf(ofp, " TRACE_ALERT = 1\n");
151 fprintf(ofp, " TRACE_CRIT = 2\n");
152 fprintf(ofp, " TRACE_ERR = 3\n");
153 fprintf(ofp, " TRACE_WARNING = 4\n");
154 fprintf(ofp, " TRACE_NOTICE = 5\n");
155 fprintf(ofp, " TRACE_INFO = 6\n");
156 fprintf(ofp, " TRACE_DEBUG_SYSTEM = 7\n");
157 fprintf(ofp, " TRACE_DEBUG_PROGRAM = 8\n");
158 fprintf(ofp, " TRACE_DEBUG_PROCESS = 9\n");
159 fprintf(ofp, " TRACE_DEBUG_MODULE = 10\n");
160 fprintf(ofp, " TRACE_DEBUG_UNIT = 11\n");
161 fprintf(ofp, " TRACE_DEBUG_FUNCTION = 12\n");
162 fprintf(ofp, " TRACE_DEBUG_LINE = 13\n");
163 fprintf(ofp, " TRACE_DEBUG = 14\n");
164 fprintf(ofp, " (shortcuts such as \"system\" are allowed)\n");
300b8fd5 165 fprintf(ofp, "\n");
f3ed775e
DG		 166}
167
0d63dd19 168/*
6181537c 169 * Parse probe options.
0d63dd19 170 */
cf0e5467 171static int parse_probe_opts(struct lttng_event *ev, char *opt)
0d63dd19
DG		 172{
173 int ret;
8ff0bbd0 174 char s_hex[19];
0d63dd19
DG		 175 char name[LTTNG_SYMBOL_NAME_LEN];
176
177 if (opt == NULL) {
178 ret = -1;
8f0d098b 179 goto end;
0d63dd19
DG		 180 }
181
182 /* Check for symbol+offset */
8ff0bbd0 183 ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19 184 if (ret == 2) {
7d29a247 185 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 186 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467 187 DBG("probe symbol %s", ev->attr.probe.symbol_name);
8ff0bbd0
DG		 188 if (strlen(s_hex) == 0) {
189 ERR("Invalid probe offset %s", s_hex);
0d63dd19 190 ret = -1;
8f0d098b 191 goto end;
0d63dd19 192 }
8ff0bbd0 193 ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467 194 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78 195 ev->attr.probe.addr = 0;
8f0d098b
MD		 196 goto end;
197 }
198
199 /* Check for symbol */
200 if (isalpha(name[0])) {
201 ret = sscanf(opt, "%s", name);
202 if (ret == 1) {
203 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 204 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b
MD		 205 DBG("probe symbol %s", ev->attr.probe.symbol_name);
206 ev->attr.probe.offset = 0;
207 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
208 ev->attr.probe.addr = 0;
209 goto end;
210 }
0d63dd19
DG		 211 }
212
213 /* Check for address */
8ff0bbd0 214 ret = sscanf(opt, "%s", s_hex);
0d63dd19 215 if (ret > 0) {
8ff0bbd0
DG		 216 if (strlen(s_hex) == 0) {
217 ERR("Invalid probe address %s", s_hex);
0d63dd19 218 ret = -1;
8f0d098b 219 goto end;
0d63dd19 220 }
8ff0bbd0 221 ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467 222 DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78
DG		 223 ev->attr.probe.offset = 0;
224 memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b 225 goto end;
0d63dd19
DG		 226 }
227
228 /* No match */
229 ret = -1;
230
8f0d098b 231end:
0d63dd19
DG		 232 return ret;
233}
234
8005f29a 235/*
0c8477c8 236 * Maps loglevel from string to value
8005f29a
MD		 237 */
238static
46839cc2 239int loglevel_str_to_value(const char *inputstr)
8005f29a 240{
46839cc2
MD		 241 int i = 0;
242 char str[LTTNG_SYMBOL_NAME_LEN];
243
244 while (inputstr[i] != '\0' && i < LTTNG_SYMBOL_NAME_LEN) {
245 str[i] = toupper(inputstr[i]);
246 i++;
247 }
248 str[i] = '\0';
249 if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) {
250 return LTTNG_LOGLEVEL_EMERG;
251 } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) {
252 return LTTNG_LOGLEVEL_ALERT;
253 } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) {
254 return LTTNG_LOGLEVEL_CRIT;
255 } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) {
256 return LTTNG_LOGLEVEL_ERR;
257 } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) {
258 return LTTNG_LOGLEVEL_WARNING;
259 } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) {
260 return LTTNG_LOGLEVEL_NOTICE;
261 } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) {
262 return LTTNG_LOGLEVEL_INFO;
263 } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) {
264 return LTTNG_LOGLEVEL_DEBUG_SYSTEM;
265 } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) {
266 return LTTNG_LOGLEVEL_DEBUG_PROGRAM;
267 } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) {
268 return LTTNG_LOGLEVEL_DEBUG_PROCESS;
269 } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) {
270 return LTTNG_LOGLEVEL_DEBUG_MODULE;
271 } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) {
272 return LTTNG_LOGLEVEL_DEBUG_UNIT;
273 } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) {
274 return LTTNG_LOGLEVEL_DEBUG_FUNCTION;
275 } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) {
276 return LTTNG_LOGLEVEL_DEBUG_LINE;
277 } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) {
278 return LTTNG_LOGLEVEL_DEBUG;
8005f29a
MD		 279 } else {
280 return -1;
281 }
282}
283
f3ed775e 284/*
6181537c 285 * Enabling event using the lttng API.
f3ed775e 286 */
cd80958d 287static int enable_events(char *session_name)
f3ed775e 288{
ae856491 289 int err, ret = CMD_SUCCESS, warn = 0;
b73d0b29 290 char *event_name, *channel_name = NULL;
f3ed775e 291 struct lttng_event ev;
7d29a247 292 struct lttng_domain dom;
f3ed775e 293
441c16a7
MD		 294 memset(&ev, 0, sizeof(ev));
295 memset(&dom, 0, sizeof(dom));
296
7d29a247
DG		 297 /* Create lttng domain */
298 if (opt_kernel) {
299 dom.type = LTTNG_DOMAIN_KERNEL;
d78d6610 300 } else if (opt_userspace) {
2bdd86d4 301 dom.type = LTTNG_DOMAIN_UST;
6181537c 302 } else {
e14f64a8 303 ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
d16c1a4c 304 ret = CMD_ERROR;
6181537c 305 goto error;
2bdd86d4 306 }
7d29a247 307
ae856491
DG		 308 if (opt_channel_name == NULL) {
309 err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
310 if (err < 0) {
311 ret = CMD_FATAL;
312 goto error;
313 }
314 } else {
315 channel_name = opt_channel_name;
316 }
317
cd80958d
DG		 318 handle = lttng_create_handle(session_name, &dom);
319 if (handle == NULL) {
320 ret = -1;
321 goto error;
322 }
1aef21b6 323
cd80958d 324 if (opt_enable_all) {
8c9ae521 325 /* Default setup for enable all */
75e8c5ab
MD		 326 if (opt_kernel) {
327 ev.type = opt_event_type;
328 ev.name[0] = '\0';
300b8fd5
MD		 329 /* kernel loglevels not implemented */
330 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
75e8c5ab
MD		 331 } else {
332 ev.type = LTTNG_EVENT_TRACEPOINT;
333 strcpy(ev.name, "*");
300b8fd5
MD		 334 ev.loglevel_type = opt_loglevel_type;
335 if (opt_loglevel) {
336 ev.loglevel = loglevel_str_to_value(opt_loglevel);
337 if (ev.loglevel == -1) {
338 ERR("Unknown loglevel %s", opt_loglevel);
339 ret = -1;
340 goto error;
341 }
22e25b71
MD		 342 } else {
343 ev.loglevel = -1;
300b8fd5 344 }
75e8c5ab 345 }
8c9ae521
DG		 346
347 ret = lttng_enable_event(handle, &ev, channel_name);
348 if (ret < 0) {
42224349
DG		 349 switch (-ret) {
350 case LTTCOMM_KERN_EVENT_EXIST:
351 WARN("Kernel events already enabled (channel %s, session %s)",
352 channel_name, session_name);
6d805133 353 break;
42224349 354 default:
a6de644c 355 ERR("Events: %s (channel %s, session %s)",
42224349
DG		 356 lttng_strerror(ret), channel_name, session_name);
357 break;
358 }
6d805133 359 goto end;
8c9ae521
DG		 360 }
361
0133c199
MD		 362 switch (opt_event_type) {
363 case LTTNG_EVENT_TRACEPOINT:
57064ada
MD		 364 if (opt_loglevel) {
365 MSG("All %s tracepoints are enabled in channel %s for loglevel %s",
366 opt_kernel ? "kernel" : "UST", channel_name,
367 opt_loglevel);
368 } else {
369 MSG("All %s tracepoints are enabled in channel %s",
370 opt_kernel ? "kernel" : "UST", channel_name);
371
372 }
0133c199 373 break;
a54bd42d 374 case LTTNG_EVENT_SYSCALL:
0133c199 375 if (opt_kernel) {
8c9ae521
DG		 376 MSG("All kernel system calls are enabled in channel %s",
377 channel_name);
c93d9daf 378 }
0133c199 379 break;
7a3d1328 380 case LTTNG_EVENT_ALL:
57064ada
MD		 381 if (opt_loglevel) {
382 MSG("All %s events are enabled in channel %s for loglevel %s",
383 opt_kernel ? "kernel" : "UST", channel_name,
384 opt_loglevel);
385 } else {
386 MSG("All %s events are enabled in channel %s",
387 opt_kernel ? "kernel" : "UST", channel_name);
388 }
7a3d1328 389 break;
0133c199 390 default:
8c9ae521 391 /*
6181537c
DG		 392 * We should not be here since lttng_enable_event should have
393 * failed on the event type.
8c9ae521 394 */
f3ed775e
DG		 395 goto error;
396 }
8c9ae521 397 goto end;
f3ed775e
DG		 398 }
399
400 /* Strip event list */
401 event_name = strtok(opt_event_list, ",");
402 while (event_name != NULL) {
6181537c
DG		 403 /* Copy name and type of the event */
404 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
405 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
406 ev.type = opt_event_type;
407
f3ed775e
DG		 408 /* Kernel tracer action */
409 if (opt_kernel) {
410 DBG("Enabling kernel event %s for channel %s",
411 event_name, channel_name);
f3ed775e
DG		 412
413 switch (opt_event_type) {
7a3d1328
MD		 414 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
415 ev.type = LTTNG_EVENT_TRACEPOINT;
416 /* Fall-through */
e6ddca71 417 case LTTNG_EVENT_TRACEPOINT:
f3ed775e 418 break;
7d29a247 419 case LTTNG_EVENT_PROBE:
cf0e5467 420 ret = parse_probe_opts(&ev, opt_probe);
0d63dd19 421 if (ret < 0) {
cf0e5467 422 ERR("Unable to parse probe options");
0d63dd19
DG		 423 ret = 0;
424 goto error;
425 }
f3ed775e
DG		 426 break;
427 case LTTNG_EVENT_FUNCTION:
8f0d098b
MD		 428 ret = parse_probe_opts(&ev, opt_function);
429 if (ret < 0) {
430 ERR("Unable to parse function probe options");
431 ret = 0;
432 goto error;
433 }
434 break;
435 case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c
DG		 436 strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
437 LTTNG_SYMBOL_NAME_LEN);
99497cd0 438 ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e 439 break;
a54bd42d 440 case LTTNG_EVENT_SYSCALL:
6181537c
DG		 441 MSG("per-syscall selection not supported yet. Use \"-a\" "
442 "for all syscalls.");
f3ed775e 443 default:
1ab1ea0b 444 ret = CMD_UNDEFINED;
f3ed775e
DG		 445 goto error;
446 }
0cda4f28 447
ed7f4083 448 if (opt_loglevel) {
0cda4f28
MD		 449 MSG("Kernel loglevels are not supported.");
450 ret = CMD_UNDEFINED;
451 goto error;
452 }
453
454 /* kernel loglevels not implemented */
8005f29a 455 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
f3ed775e 456 } else if (opt_userspace) { /* User-space tracer action */
d78d6610 457#if 0
e14f64a8
DG		 458 if (opt_cmd_name != NULL || opt_pid) {
459 MSG("Only supporting tracing all UST processes (-u) for now.");
1ab1ea0b 460 ret = CMD_UNDEFINED;
2bdd86d4
MD		 461 goto error;
462 }
d78d6610 463#endif
6181537c 464
300b8fd5
MD		 465 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
466 channel_name, opt_loglevel ? : "<all>");
2bdd86d4
MD		 467
468 switch (opt_event_type) {
469 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4
MD		 470 /* Fall-through */
471 case LTTNG_EVENT_TRACEPOINT:
e4baff1e
MD		 472 /* Copy name and type of the event */
473 ev.type = LTTNG_EVENT_TRACEPOINT;
474 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
475 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4
MD		 476 break;
477 case LTTNG_EVENT_PROBE:
478 case LTTNG_EVENT_FUNCTION:
479 case LTTNG_EVENT_FUNCTION_ENTRY:
480 case LTTNG_EVENT_SYSCALL:
481 default:
cc62c0c0 482 ERR("Event type not available for user-space tracing");
1ab1ea0b 483 ret = CMD_UNDEFINED;
2bdd86d4
MD		 484 goto error;
485 }
0cda4f28
MD		 486
487 ev.loglevel_type = opt_loglevel_type;
ed7f4083 488 if (opt_loglevel) {
8005f29a
MD		 489 ev.loglevel = loglevel_str_to_value(opt_loglevel);
490 if (ev.loglevel == -1) {
491 ERR("Unknown loglevel %s", opt_loglevel);
300b8fd5 492 ret = -1;
8005f29a
MD		 493 goto error;
494 }
22e25b71
MD		 495 } else {
496 ev.loglevel = -1;
ed7f4083 497 }
f3ed775e 498 } else {
e14f64a8 499 ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
300b8fd5 500 ret = CMD_ERROR;
f3ed775e
DG		 501 goto error;
502 }
503
6181537c 504 ret = lttng_enable_event(handle, &ev, channel_name);
ae856491 505 if (ret < 0) {
42224349
DG		 506 /* Turn ret to positive value to handle the positive error code */
507 switch (-ret) {
508 case LTTCOMM_KERN_EVENT_EXIST:
509 WARN("Kernel event %s already enabled (channel %s, session %s)",
510 event_name, channel_name, session_name);
511 break;
512 default:
513 ERR("Event %s: %s (channel %s, session %s)", event_name,
514 lttng_strerror(ret), channel_name, session_name);
515 break;
516 }
ae856491
DG		 517 warn = 1;
518 } else {
6181537c
DG		 519 MSG("%s event %s created in channel %s",
520 opt_kernel ? "kernel": "UST", event_name, channel_name);
521 }
522
f3ed775e
DG		 523 /* Next event */
524 event_name = strtok(NULL, ",");
525 }
526
8c9ae521 527end:
f3ed775e 528error:
ae856491
DG		 529 if (warn) {
530 ret = CMD_WARNING;
531 }
b73d0b29
MD		 532 if (opt_channel_name == NULL) {
533 free(channel_name);
534 }
cd80958d
DG		 535 lttng_destroy_handle(handle);
536
f3ed775e
DG		 537 return ret;
538}
539
540/*
6181537c 541 * Add event to trace session
f3ed775e
DG		 542 */
543int cmd_enable_events(int argc, const char **argv)
544{
ca1c3607 545 int opt, ret = CMD_SUCCESS;
f3ed775e 546 static poptContext pc;
cd80958d 547 char *session_name = NULL;
f3ed775e
DG		 548
549 pc = poptGetContext(NULL, argc, argv, long_options, 0);
550 poptReadDefaultConfig(pc, 0);
551
552 /* Default event type */
7a3d1328 553 opt_event_type = LTTNG_EVENT_ALL;
f3ed775e
DG		 554
555 while ((opt = poptGetNextOpt(pc)) != -1) {
556 switch (opt) {
557 case OPT_HELP:
ca1c3607 558 usage(stdout);
f3ed775e 559 goto end;
f3ed775e 560 case OPT_TRACEPOINT:
e6ddca71 561 opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e 562 break;
cf0e5467 563 case OPT_PROBE:
7d29a247 564 opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e
DG		 565 break;
566 case OPT_FUNCTION:
567 opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b
MD		 568 break;
569 case OPT_FUNCTION_ENTRY:
570 opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e 571 break;
a54bd42d
MD		 572 case OPT_SYSCALL:
573 opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199 574 break;
eeac7d46
MD		 575 case OPT_USERSPACE:
576 opt_userspace = 1;
eeac7d46 577 break;
0cda4f28 578 case OPT_LOGLEVEL:
8005f29a 579 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
0cda4f28
MD		 580 opt_loglevel = poptGetOptArg(pc);
581 break;
582 case OPT_LOGLEVEL_ONLY:
8005f29a 583 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
0cda4f28 584 opt_loglevel = poptGetOptArg(pc);
13dce3b7 585 break;
679b4943
SM		 586 case OPT_LIST_OPTIONS:
587 list_cmd_options(stdout, long_options);
679b4943 588 goto end;
f3ed775e
DG		 589 default:
590 usage(stderr);
591 ret = CMD_UNDEFINED;
592 goto end;
593 }
594 }
595
596 opt_event_list = (char*) poptGetArg(pc);
597 if (opt_event_list == NULL && opt_enable_all == 0) {
598 ERR("Missing event name(s).\n");
599 usage(stderr);
ca1c3607 600 ret = CMD_ERROR;
f3ed775e
DG		 601 goto end;
602 }
603
cd80958d
DG		 604 if (!opt_session_name) {
605 session_name = get_session_name();
606 if (session_name == NULL) {
ca1c3607 607 ret = CMD_ERROR;
cd80958d
DG		 608 goto end;
609 }
610 } else {
611 session_name = opt_session_name;
612 }
613
614 ret = enable_events(session_name);
f3ed775e
DG		 615
616end:
cd80958d
DG		 617 if (opt_session_name == NULL) {
618 free(session_name);
619 }
620
ca1c3607 621 poptFreeContext(pc);
f3ed775e
DG		 622 return ret;
623}
LTTng 2.0 tools and control repository
This page took 0.060418 seconds and 4 git commands to generate.