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Add usage for --exclude option
[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 38static int opt_userspace;
b9dfb167 39static int opt_jul;
f3ed775e 40static int opt_enable_all;
cf0e5467 41static char *opt_probe;
8f0d098b
MD		 42static char *opt_function;
43static char *opt_function_entry_symbol;
f3ed775e 44static char *opt_channel_name;
53a80697 45static char *opt_filter;
fac3366c 46static char *opt_exclude;
d78d6610
DG		 47#if 0
48/* Not implemented yet */
49static char *opt_cmd_name;
50static pid_t opt_pid;
51#endif
f3ed775e
DG		 52
53enum {
54 OPT_HELP = 1,
f3ed775e 55 OPT_TRACEPOINT,
cf0e5467 56 OPT_PROBE,
f3ed775e 57 OPT_FUNCTION,
8f0d098b 58 OPT_FUNCTION_ENTRY,
a54bd42d 59 OPT_SYSCALL,
eeac7d46 60 OPT_USERSPACE,
0cda4f28
MD		 61 OPT_LOGLEVEL,
62 OPT_LOGLEVEL_ONLY,
679b4943 63 OPT_LIST_OPTIONS,
53a80697 64 OPT_FILTER,
fac3366c 65 OPT_EXCLUDE,
f3ed775e
DG		 66};
67
cd80958d
DG		 68static struct lttng_handle *handle;
69
f3ed775e
DG		 70static struct poptOption long_options[] = {
71 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
72 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42 73 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
e14f64a8 74 {"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
f3ed775e
DG		 75 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
76 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
d78d6610 77 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
b9dfb167 78 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
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},
53a80697 93 {"filter", 'f', POPT_ARG_STRING, &opt_filter, OPT_FILTER, 0, 0},
fac3366c 94 {"exclude", 'x', POPT_ARG_STRING, &opt_exclude, OPT_EXCLUDE, 0, 0},
f3ed775e
DG		 95 {0, 0, 0, 0, 0, 0, 0}
96};
97
98/*
99 * usage
100 */
101static void usage(FILE *ofp)
102{
32a6298d 103 fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [-k|-u] [OPTIONS] \n");
f3ed775e 104 fprintf(ofp, "\n");
32a6298d 105 fprintf(ofp, "Options:\n");
f3ed775e 106 fprintf(ofp, " -h, --help Show this help\n");
679b4943 107 fprintf(ofp, " --list-options Simple listing of options\n");
32a6298d
DG		 108 fprintf(ofp, " -s, --session NAME Apply to session name\n");
109 fprintf(ofp, " -c, --channel NAME Apply to this channel\n");
e08bff8d 110 fprintf(ofp, " -a, --all Enable all tracepoints and syscalls\n");
f3ed775e 111 fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
27221701 112 fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
b9dfb167 113 fprintf(ofp, " -j, --jul Apply for Java application using JUL\n");
f3ed775e
DG		 114 fprintf(ofp, "\n");
115 fprintf(ofp, "Event options:\n");
116 fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
be49af1e
MD		 117 fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
118 fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
119 fprintf(ofp, " e.g.:\n");
120 fprintf(ofp, " \"*\"\n");
121 fprintf(ofp, " \"app_component:na*\"\n");
6a240cd9 122 fprintf(ofp, " --probe (addr | symbol | symbol+offset)\n");
cf0e5467
MD		 123 fprintf(ofp, " Dynamic probe.\n");
124 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
125 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
6a240cd9 126 fprintf(ofp, " --function (addr | symbol | symbol+offset)\n");
8f0d098b
MD		 127 fprintf(ofp, " Dynamic function entry/return probe.\n");
128 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
129 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
b213d387 130#if 0
8f0d098b
MD		 131 fprintf(ofp, " --function:entry symbol\n");
132 fprintf(ofp, " Function tracer event\n");
b213d387 133#endif
a54bd42d 134 fprintf(ofp, " --syscall System call event\n");
f3ed775e 135 fprintf(ofp, "\n");
300b8fd5
MD		 136 fprintf(ofp, " --loglevel name\n");
137 fprintf(ofp, " Tracepoint loglevel range from 0 to loglevel\n");
138 fprintf(ofp, " --loglevel-only name\n");
139 fprintf(ofp, " Tracepoint loglevel (only this loglevel)\n");
140 fprintf(ofp, "\n");
0c8477c8
MD		 141 fprintf(ofp, " The loglevel or loglevel-only options should be\n");
142 fprintf(ofp, " combined with a tracepoint name or tracepoint\n");
143 fprintf(ofp, " wildcard.\n");
144 fprintf(ofp, " Available loglevels:\n");
145 fprintf(ofp, " (higher value is more verbose)\n");
46839cc2
MD		 146 fprintf(ofp, " TRACE_EMERG = 0\n");
147 fprintf(ofp, " TRACE_ALERT = 1\n");
148 fprintf(ofp, " TRACE_CRIT = 2\n");
149 fprintf(ofp, " TRACE_ERR = 3\n");
150 fprintf(ofp, " TRACE_WARNING = 4\n");
151 fprintf(ofp, " TRACE_NOTICE = 5\n");
152 fprintf(ofp, " TRACE_INFO = 6\n");
153 fprintf(ofp, " TRACE_DEBUG_SYSTEM = 7\n");
154 fprintf(ofp, " TRACE_DEBUG_PROGRAM = 8\n");
155 fprintf(ofp, " TRACE_DEBUG_PROCESS = 9\n");
156 fprintf(ofp, " TRACE_DEBUG_MODULE = 10\n");
157 fprintf(ofp, " TRACE_DEBUG_UNIT = 11\n");
158 fprintf(ofp, " TRACE_DEBUG_FUNCTION = 12\n");
159 fprintf(ofp, " TRACE_DEBUG_LINE = 13\n");
160 fprintf(ofp, " TRACE_DEBUG = 14\n");
161 fprintf(ofp, " (shortcuts such as \"system\" are allowed)\n");
f2611ab0 162 fprintf(ofp, " -f, --filter \'expression\'\n");
ee8ccafa
MD		 163 fprintf(ofp, " Filter expression on event fields and context.\n");
164 fprintf(ofp, " Event recording depends on evaluation.\n");
919e300c
MD		 165 fprintf(ofp, " Only specify on first activation of\n");
166 fprintf(ofp, " a given event within a session.\n");
167 fprintf(ofp, " Filter only allowed when enabling\n");
168 fprintf(ofp, " events within a session before tracing\n");
9bd578f5
MD		 169 fprintf(ofp, " is started. If the filter fails to link\n");
170 fprintf(ofp, " with the event within the traced domain,\n");
171 fprintf(ofp, " the event will be discarded. Currently,\n");
172 fprintf(ofp, " filter is only implemented for the user-space\n");
173 fprintf(ofp, " tracer.\n");
174 fprintf(ofp, " Expression examples:.\n");
175 fprintf(ofp, " \n");
176 fprintf(ofp, " 'intfield > 500 && intfield < 503'\n");
6a240cd9 177 fprintf(ofp, " '(strfield == \"test\" || intfield != 10) && intfield > 33'\n");
9bd578f5
MD		 178 fprintf(ofp, " 'doublefield > 1.1 && intfield < 5.3'\n");
179 fprintf(ofp, " \n");
180 fprintf(ofp, " Wildcards are allowed at the end of strings:\n");
181 fprintf(ofp, " 'seqfield1 == \"te*\"'\n");
182 fprintf(ofp, " In string literals, the escape character is '\\'.\n");
183 fprintf(ofp, " Use '\\*' for the '*' character, and '\\\\' for\n");
ee8ccafa
MD		 184 fprintf(ofp, " the '\\' character. Wildcard match any sequence of,\n");
185 fprintf(ofp, " characters including an empty sub-string (match 0 or\n");
186 fprintf(ofp, " more characters).\n");
187 fprintf(ofp, "\n");
188 fprintf(ofp, " Context information can be used for filtering. The\n");
189 fprintf(ofp, " examples below show usage of context filtering on\n");
190 fprintf(ofp, " process name (with a wildcard), process ID range, and\n");
191 fprintf(ofp, " unique thread ID for filtering. The process and\n");
192 fprintf(ofp, " thread ID of running applications can be found under\n");
193 fprintf(ofp, " columns \"PID\" and \"LWP\" of the \"ps -eLf\" command.\n");
194 fprintf(ofp, "\n");
195 fprintf(ofp, " '$ctx.procname == \"demo*\"'\n");
196 fprintf(ofp, " '$ctx.vpid >= 4433 && $ctx.vpid < 4455'\n");
197 fprintf(ofp, " '$ctx.vtid == 1234'\n");
c2063d0b
JI		 198 fprintf(ofp, " -x, --exclude LIST\n");
199 fprintf(ofp, " Add exclusions to UST tracepoints:\n");
200 fprintf(ofp, " Events that match any of the items\n");
201 fprintf(ofp, " in the comma-separated LIST are not\n");
202 fprintf(ofp, " enabled, even if they match a wildcard\n");
203 fprintf(ofp, " definition of the event.\n");
300b8fd5 204 fprintf(ofp, "\n");
f3ed775e
DG		 205}
206
0d63dd19 207/*
6181537c 208 * Parse probe options.
0d63dd19 209 */
cf0e5467 210static int parse_probe_opts(struct lttng_event *ev, char *opt)
0d63dd19
DG		 211{
212 int ret;
8ff0bbd0 213 char s_hex[19];
0d63dd19
DG		 214 char name[LTTNG_SYMBOL_NAME_LEN];
215
216 if (opt == NULL) {
217 ret = -1;
8f0d098b 218 goto end;
0d63dd19
DG		 219 }
220
221 /* Check for symbol+offset */
8ff0bbd0 222 ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19 223 if (ret == 2) {
7d29a247 224 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 225 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467 226 DBG("probe symbol %s", ev->attr.probe.symbol_name);
9d035200 227 if (*s_hex == '\0') {
8ff0bbd0 228 ERR("Invalid probe offset %s", s_hex);
0d63dd19 229 ret = -1;
8f0d098b 230 goto end;
0d63dd19 231 }
8ff0bbd0 232 ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467 233 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78 234 ev->attr.probe.addr = 0;
8f0d098b
MD		 235 goto end;
236 }
237
238 /* Check for symbol */
239 if (isalpha(name[0])) {
240 ret = sscanf(opt, "%s", name);
241 if (ret == 1) {
242 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 243 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b
MD		 244 DBG("probe symbol %s", ev->attr.probe.symbol_name);
245 ev->attr.probe.offset = 0;
246 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
247 ev->attr.probe.addr = 0;
248 goto end;
249 }
0d63dd19
DG		 250 }
251
252 /* Check for address */
8ff0bbd0 253 ret = sscanf(opt, "%s", s_hex);
0d63dd19 254 if (ret > 0) {
9d035200 255 if (*s_hex == '\0') {
8ff0bbd0 256 ERR("Invalid probe address %s", s_hex);
0d63dd19 257 ret = -1;
8f0d098b 258 goto end;
0d63dd19 259 }
8ff0bbd0 260 ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467 261 DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78
DG		 262 ev->attr.probe.offset = 0;
263 memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b 264 goto end;
0d63dd19
DG		 265 }
266
267 /* No match */
268 ret = -1;
269
8f0d098b 270end:
0d63dd19
DG		 271 return ret;
272}
273
8005f29a 274/*
0c8477c8 275 * Maps loglevel from string to value
8005f29a
MD		 276 */
277static
46839cc2 278int loglevel_str_to_value(const char *inputstr)
8005f29a 279{
46839cc2
MD		 280 int i = 0;
281 char str[LTTNG_SYMBOL_NAME_LEN];
282
e051e07c
DG		 283 /*
284 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
285 * added at the end of the loop so a the upper bound we avoid the overflow.
286 */
287 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
46839cc2
MD		 288 str[i] = toupper(inputstr[i]);
289 i++;
290 }
291 str[i] = '\0';
292 if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) {
293 return LTTNG_LOGLEVEL_EMERG;
294 } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) {
295 return LTTNG_LOGLEVEL_ALERT;
296 } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) {
297 return LTTNG_LOGLEVEL_CRIT;
298 } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) {
299 return LTTNG_LOGLEVEL_ERR;
300 } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) {
301 return LTTNG_LOGLEVEL_WARNING;
302 } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) {
303 return LTTNG_LOGLEVEL_NOTICE;
304 } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) {
305 return LTTNG_LOGLEVEL_INFO;
306 } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) {
307 return LTTNG_LOGLEVEL_DEBUG_SYSTEM;
308 } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) {
309 return LTTNG_LOGLEVEL_DEBUG_PROGRAM;
310 } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) {
311 return LTTNG_LOGLEVEL_DEBUG_PROCESS;
312 } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) {
313 return LTTNG_LOGLEVEL_DEBUG_MODULE;
314 } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) {
315 return LTTNG_LOGLEVEL_DEBUG_UNIT;
316 } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) {
317 return LTTNG_LOGLEVEL_DEBUG_FUNCTION;
318 } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) {
319 return LTTNG_LOGLEVEL_DEBUG_LINE;
320 } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) {
321 return LTTNG_LOGLEVEL_DEBUG;
8005f29a
MD		 322 } else {
323 return -1;
324 }
325}
326
85076754
MD		 327static
328const char *print_channel_name(const char *name)
329{
330 return name ? : DEFAULT_CHANNEL_NAME;
331}
332
333static
334const char *print_raw_channel_name(const char *name)
335{
336 return name ? : "<default>";
337}
338
f3ed775e 339/*
6181537c 340 * Enabling event using the lttng API.
f3ed775e 341 */
cd80958d 342static int enable_events(char *session_name)
f3ed775e 343{
85076754 344 int ret = CMD_SUCCESS, warn = 0;
b73d0b29 345 char *event_name, *channel_name = NULL;
f3ed775e 346 struct lttng_event ev;
7d29a247 347 struct lttng_domain dom;
f3ed775e 348
441c16a7
MD		 349 memset(&ev, 0, sizeof(ev));
350 memset(&dom, 0, sizeof(dom));
351
53a80697
MD		 352 if (opt_kernel) {
353 if (opt_filter) {
354 ERR("Filter not implement for kernel tracing yet");
355 ret = CMD_ERROR;
356 goto error;
357 }
67b58630
JG		 358 if (opt_loglevel) {
359 WARN("Kernel loglevels are not supported.");
360 }
53a80697
MD		 361 }
362
7d29a247
DG		 363 /* Create lttng domain */
364 if (opt_kernel) {
365 dom.type = LTTNG_DOMAIN_KERNEL;
7972aab2 366 dom.buf_type = LTTNG_BUFFER_GLOBAL;
d78d6610 367 } else if (opt_userspace) {
2bdd86d4 368 dom.type = LTTNG_DOMAIN_UST;
7972aab2 369 /* Default. */
8692d4e5 370 dom.buf_type = LTTNG_BUFFER_PER_UID;
b9dfb167
DG		 371 } else if (opt_jul) {
372 dom.type = LTTNG_DOMAIN_JUL;
373 /* Default. */
374 dom.buf_type = LTTNG_BUFFER_PER_UID;
6181537c 375 } else {
b9dfb167 376 print_missing_domain();
d16c1a4c 377 ret = CMD_ERROR;
6181537c 378 goto error;
2bdd86d4 379 }
7d29a247 380
85076754 381 channel_name = opt_channel_name;
ae856491 382
cd80958d
DG		 383 handle = lttng_create_handle(session_name, &dom);
384 if (handle == NULL) {
385 ret = -1;
386 goto error;
387 }
1aef21b6 388
cd80958d 389 if (opt_enable_all) {
8c9ae521 390 /* Default setup for enable all */
75e8c5ab
MD		 391 if (opt_kernel) {
392 ev.type = opt_event_type;
393 ev.name[0] = '\0';
300b8fd5
MD		 394 /* kernel loglevels not implemented */
395 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
75e8c5ab
MD		 396 } else {
397 ev.type = LTTNG_EVENT_TRACEPOINT;
398 strcpy(ev.name, "*");
300b8fd5
MD		 399 ev.loglevel_type = opt_loglevel_type;
400 if (opt_loglevel) {
401 ev.loglevel = loglevel_str_to_value(opt_loglevel);
402 if (ev.loglevel == -1) {
403 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 404 ret = -LTTNG_ERR_INVALID;
300b8fd5
MD		 405 goto error;
406 }
22e25b71
MD		 407 } else {
408 ev.loglevel = -1;
300b8fd5 409 }
75e8c5ab 410 }
8c9ae521 411
025faf73
DG		 412 if (!opt_filter) {
413 ret = lttng_enable_event(handle, &ev, channel_name);
414 if (ret < 0) {
415 switch (-ret) {
416 case LTTNG_ERR_KERN_EVENT_EXIST:
417 WARN("Kernel events already enabled (channel %s, session %s)",
85076754 418 print_channel_name(channel_name), session_name);
025faf73
DG		 419 break;
420 default:
421 ERR("Events: %s (channel %s, session %s)",
85076754
MD		 422 lttng_strerror(ret),
423 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
424 ? print_raw_channel_name(channel_name)
425 : print_channel_name(channel_name),
426 session_name);
025faf73
DG		 427 break;
428 }
429 goto end;
42224349 430 }
8c9ae521 431
025faf73
DG		 432 switch (opt_event_type) {
433 case LTTNG_EVENT_TRACEPOINT:
67b58630 434 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
025faf73 435 MSG("All %s tracepoints are enabled in channel %s for loglevel %s",
b9dfb167 436 get_domain_str(dom.type),
85076754 437 print_channel_name(channel_name),
025faf73
DG		 438 opt_loglevel);
439 } else {
440 MSG("All %s tracepoints are enabled in channel %s",
b9dfb167 441 get_domain_str(dom.type),
85076754 442 print_channel_name(channel_name));
025faf73
DG		 443 }
444 break;
445 case LTTNG_EVENT_SYSCALL:
446 if (opt_kernel) {
447 MSG("All kernel system calls are enabled in channel %s",
85076754 448 print_channel_name(channel_name));
025faf73
DG		 449 }
450 break;
451 case LTTNG_EVENT_ALL:
67b58630 452 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
025faf73 453 MSG("All %s events are enabled in channel %s for loglevel %s",
b9dfb167 454 get_domain_str(dom.type),
85076754 455 print_channel_name(channel_name),
025faf73
DG		 456 opt_loglevel);
457 } else {
458 MSG("All %s events are enabled in channel %s",
b9dfb167 459 get_domain_str(dom.type),
85076754 460 print_channel_name(channel_name));
025faf73
DG		 461 }
462 break;
463 default:
464 /*
465 * We should not be here since lttng_enable_event should have
466 * failed on the event type.
467 */
468 goto error;
57064ada 469 }
f3ed775e 470 }
025faf73
DG		 471 if (opt_filter) {
472 ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
16363652
DG		 473 opt_filter);
474 if (ret < 0) {
475 switch (-ret) {
476 case LTTNG_ERR_FILTER_EXIST:
85076754 477 WARN("Filter on all events is already enabled"
16363652 478 " (channel %s, session %s)",
85076754 479 print_channel_name(channel_name), session_name);
16363652
DG		 480 break;
481 default:
85076754
MD		 482 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
483 lttng_strerror(ret),
484 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
485 ? print_raw_channel_name(channel_name)
486 : print_channel_name(channel_name),
487 session_name, opt_filter);
16363652
DG		 488 break;
489 }
490 goto error;
491 } else {
492 MSG("Filter '%s' successfully set", opt_filter);
493 }
494 }
8c9ae521 495 goto end;
f3ed775e
DG		 496 }
497
498 /* Strip event list */
499 event_name = strtok(opt_event_list, ",");
500 while (event_name != NULL) {
6181537c
DG		 501 /* Copy name and type of the event */
502 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
503 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
504 ev.type = opt_event_type;
505
f3ed775e
DG		 506 /* Kernel tracer action */
507 if (opt_kernel) {
508 DBG("Enabling kernel event %s for channel %s",
85076754
MD		 509 event_name,
510 print_channel_name(channel_name));
f3ed775e
DG		 511
512 switch (opt_event_type) {
7a3d1328
MD		 513 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
514 ev.type = LTTNG_EVENT_TRACEPOINT;
515 /* Fall-through */
e6ddca71 516 case LTTNG_EVENT_TRACEPOINT:
f3ed775e 517 break;
7d29a247 518 case LTTNG_EVENT_PROBE:
cf0e5467 519 ret = parse_probe_opts(&ev, opt_probe);
0d63dd19 520 if (ret < 0) {
cf0e5467 521 ERR("Unable to parse probe options");
0d63dd19
DG		 522 ret = 0;
523 goto error;
524 }
f3ed775e
DG		 525 break;
526 case LTTNG_EVENT_FUNCTION:
8f0d098b
MD		 527 ret = parse_probe_opts(&ev, opt_function);
528 if (ret < 0) {
529 ERR("Unable to parse function probe options");
530 ret = 0;
531 goto error;
532 }
533 break;
534 case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c
DG		 535 strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
536 LTTNG_SYMBOL_NAME_LEN);
99497cd0 537 ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e 538 break;
a54bd42d 539 case LTTNG_EVENT_SYSCALL:
6181537c
DG		 540 MSG("per-syscall selection not supported yet. Use \"-a\" "
541 "for all syscalls.");
f3ed775e 542 default:
1ab1ea0b 543 ret = CMD_UNDEFINED;
f3ed775e
DG		 544 goto error;
545 }
0cda4f28 546
0cda4f28 547 /* kernel loglevels not implemented */
8005f29a 548 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
f3ed775e 549 } else if (opt_userspace) { /* User-space tracer action */
d78d6610 550#if 0
e14f64a8
DG		 551 if (opt_cmd_name != NULL || opt_pid) {
552 MSG("Only supporting tracing all UST processes (-u) for now.");
1ab1ea0b 553 ret = CMD_UNDEFINED;
2bdd86d4
MD		 554 goto error;
555 }
d78d6610 556#endif
6181537c 557
300b8fd5 558 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
85076754 559 print_channel_name(channel_name), opt_loglevel ? : "<all>");
2bdd86d4
MD		 560
561 switch (opt_event_type) {
562 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4
MD		 563 /* Fall-through */
564 case LTTNG_EVENT_TRACEPOINT:
e4baff1e
MD		 565 /* Copy name and type of the event */
566 ev.type = LTTNG_EVENT_TRACEPOINT;
567 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
568 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4
MD		 569 break;
570 case LTTNG_EVENT_PROBE:
571 case LTTNG_EVENT_FUNCTION:
572 case LTTNG_EVENT_FUNCTION_ENTRY:
573 case LTTNG_EVENT_SYSCALL:
574 default:
cc62c0c0 575 ERR("Event type not available for user-space tracing");
4ce78777 576 ret = CMD_UNSUPPORTED;
2bdd86d4
MD		 577 goto error;
578 }
0cda4f28
MD		 579
580 ev.loglevel_type = opt_loglevel_type;
ed7f4083 581 if (opt_loglevel) {
8005f29a
MD		 582 ev.loglevel = loglevel_str_to_value(opt_loglevel);
583 if (ev.loglevel == -1) {
584 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 585 ret = -LTTNG_ERR_INVALID;
8005f29a
MD		 586 goto error;
587 }
22e25b71
MD		 588 } else {
589 ev.loglevel = -1;
ed7f4083 590 }
b9dfb167
DG		 591 } else if (opt_jul) {
592 if (opt_event_type != LTTNG_EVENT_ALL &&
593 opt_event_type != LTTNG_EVENT_TRACEPOINT) {
594 ERR("Event type not supported for JUL domain.");
595 ret = CMD_UNSUPPORTED;
596 goto error;
597 }
598 ev.type = LTTNG_EVENT_TRACEPOINT;
599 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
600 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e 601 } else {
b9dfb167 602 print_missing_domain();
300b8fd5 603 ret = CMD_ERROR;
f3ed775e
DG		 604 goto error;
605 }
606
025faf73
DG		 607 if (!opt_filter) {
608 ret = lttng_enable_event(handle, &ev, channel_name);
609 if (ret < 0) {
610 /* Turn ret to positive value to handle the positive error code */
611 switch (-ret) {
612 case LTTNG_ERR_KERN_EVENT_EXIST:
613 WARN("Kernel event %s already enabled (channel %s, session %s)",
85076754
MD		 614 event_name,
615 print_channel_name(channel_name), session_name);
025faf73
DG		 616 break;
617 default:
618 ERR("Event %s: %s (channel %s, session %s)", event_name,
85076754
MD		 619 lttng_strerror(ret),
620 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
621 ? print_raw_channel_name(channel_name)
622 : print_channel_name(channel_name),
623 session_name);
025faf73
DG		 624 break;
625 }
626 warn = 1;
627 } else {
628 MSG("%s event %s created in channel %s",
b9dfb167 629 get_domain_str(dom.type), event_name,
85076754 630 print_channel_name(channel_name));
42224349 631 }
6181537c 632 }
025faf73
DG		 633
634 if (opt_filter) {
635 ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
16363652 636 opt_filter);
53a80697 637 if (ret < 0) {
7671f53c
CB		 638 switch (-ret) {
639 case LTTNG_ERR_FILTER_EXIST:
ff7ef7b8 640 WARN("Filter on event %s is already enabled"
7671f53c 641 " (channel %s, session %s)",
85076754
MD		 642 event_name,
643 print_channel_name(channel_name), session_name);
7671f53c
CB		 644 break;
645 default:
85076754
MD		 646 ERR("Event %s: %s (channel %s, session %s, filter \'%s\')", ev.name,
647 lttng_strerror(ret),
648 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
649 ? print_raw_channel_name(channel_name)
650 : print_channel_name(channel_name),
651 session_name, opt_filter);
7671f53c
CB		 652 break;
653 }
53a80697 654 goto error;
16363652
DG		 655 } else {
656 MSG("Filter '%s' successfully set", opt_filter);
53a80697
MD		 657 }
658 }
6181537c 659
f3ed775e
DG		 660 /* Next event */
661 event_name = strtok(NULL, ",");
662 }
663
8c9ae521 664end:
f3ed775e 665error:
ae856491
DG		 666 if (warn) {
667 ret = CMD_WARNING;
668 }
cd80958d
DG		 669 lttng_destroy_handle(handle);
670
f3ed775e
DG		 671 return ret;
672}
673
674/*
6181537c 675 * Add event to trace session
f3ed775e
DG		 676 */
677int cmd_enable_events(int argc, const char **argv)
678{
ca1c3607 679 int opt, ret = CMD_SUCCESS;
f3ed775e 680 static poptContext pc;
cd80958d 681 char *session_name = NULL;
de044b7a 682 int event_type = -1;
f3ed775e
DG		 683
684 pc = poptGetContext(NULL, argc, argv, long_options, 0);
685 poptReadDefaultConfig(pc, 0);
686
687 /* Default event type */
7a3d1328 688 opt_event_type = LTTNG_EVENT_ALL;
f3ed775e
DG		 689
690 while ((opt = poptGetNextOpt(pc)) != -1) {
691 switch (opt) {
692 case OPT_HELP:
ca1c3607 693 usage(stdout);
f3ed775e 694 goto end;
f3ed775e 695 case OPT_TRACEPOINT:
e6ddca71 696 opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e 697 break;
cf0e5467 698 case OPT_PROBE:
7d29a247 699 opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e
DG		 700 break;
701 case OPT_FUNCTION:
702 opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b
MD		 703 break;
704 case OPT_FUNCTION_ENTRY:
705 opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e 706 break;
a54bd42d
MD		 707 case OPT_SYSCALL:
708 opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199 709 break;
eeac7d46
MD		 710 case OPT_USERSPACE:
711 opt_userspace = 1;
eeac7d46 712 break;
0cda4f28 713 case OPT_LOGLEVEL:
8005f29a 714 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
0cda4f28
MD		 715 opt_loglevel = poptGetOptArg(pc);
716 break;
717 case OPT_LOGLEVEL_ONLY:
8005f29a 718 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
0cda4f28 719 opt_loglevel = poptGetOptArg(pc);
13dce3b7 720 break;
679b4943
SM		 721 case OPT_LIST_OPTIONS:
722 list_cmd_options(stdout, long_options);
679b4943 723 goto end;
53a80697
MD		 724 case OPT_FILTER:
725 break;
fac3366c
JI		 726 case OPT_EXCLUDE:
727 break;
f3ed775e
DG		 728 default:
729 usage(stderr);
730 ret = CMD_UNDEFINED;
731 goto end;
732 }
de044b7a
DG		 733
734 /* Validate event type. Multiple event type are not supported. */
735 if (event_type == -1) {
736 event_type = opt_event_type;
737 } else {
738 if (event_type != opt_event_type) {
739 ERR("Multiple event type not supported.");
740 ret = CMD_ERROR;
741 goto end;
742 }
743 }
f3ed775e
DG		 744 }
745
746 opt_event_list = (char*) poptGetArg(pc);
747 if (opt_event_list == NULL && opt_enable_all == 0) {
748 ERR("Missing event name(s).\n");
749 usage(stderr);
ca1c3607 750 ret = CMD_ERROR;
f3ed775e
DG		 751 goto end;
752 }
753
cd80958d
DG		 754 if (!opt_session_name) {
755 session_name = get_session_name();
756 if (session_name == NULL) {
ca1c3607 757 ret = CMD_ERROR;
cd80958d
DG		 758 goto end;
759 }
760 } else {
761 session_name = opt_session_name;
762 }
763
764 ret = enable_events(session_name);
f3ed775e
DG		 765
766end:
cd80958d
DG		 767 if (opt_session_name == NULL) {
768 free(session_name);
769 }
770
ca1c3607 771 poptFreeContext(pc);
f3ed775e
DG		 772 return ret;
773}
LTTng tools - Deliverables
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