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Add -exclude option to enable-event command
[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");
300b8fd5 198 fprintf(ofp, "\n");
f3ed775e
DG		 199}
200
0d63dd19 201/*
6181537c 202 * Parse probe options.
0d63dd19 203 */
cf0e5467 204static int parse_probe_opts(struct lttng_event *ev, char *opt)
0d63dd19
DG		 205{
206 int ret;
8ff0bbd0 207 char s_hex[19];
0d63dd19
DG		 208 char name[LTTNG_SYMBOL_NAME_LEN];
209
210 if (opt == NULL) {
211 ret = -1;
8f0d098b 212 goto end;
0d63dd19
DG		 213 }
214
215 /* Check for symbol+offset */
8ff0bbd0 216 ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19 217 if (ret == 2) {
7d29a247 218 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 219 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467 220 DBG("probe symbol %s", ev->attr.probe.symbol_name);
9d035200 221 if (*s_hex == '\0') {
8ff0bbd0 222 ERR("Invalid probe offset %s", s_hex);
0d63dd19 223 ret = -1;
8f0d098b 224 goto end;
0d63dd19 225 }
8ff0bbd0 226 ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467 227 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78 228 ev->attr.probe.addr = 0;
8f0d098b
MD		 229 goto end;
230 }
231
232 /* Check for symbol */
233 if (isalpha(name[0])) {
234 ret = sscanf(opt, "%s", name);
235 if (ret == 1) {
236 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 237 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b
MD		 238 DBG("probe symbol %s", ev->attr.probe.symbol_name);
239 ev->attr.probe.offset = 0;
240 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
241 ev->attr.probe.addr = 0;
242 goto end;
243 }
0d63dd19
DG		 244 }
245
246 /* Check for address */
8ff0bbd0 247 ret = sscanf(opt, "%s", s_hex);
0d63dd19 248 if (ret > 0) {
9d035200 249 if (*s_hex == '\0') {
8ff0bbd0 250 ERR("Invalid probe address %s", s_hex);
0d63dd19 251 ret = -1;
8f0d098b 252 goto end;
0d63dd19 253 }
8ff0bbd0 254 ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467 255 DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78
DG		 256 ev->attr.probe.offset = 0;
257 memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b 258 goto end;
0d63dd19
DG		 259 }
260
261 /* No match */
262 ret = -1;
263
8f0d098b 264end:
0d63dd19
DG		 265 return ret;
266}
267
8005f29a 268/*
0c8477c8 269 * Maps loglevel from string to value
8005f29a
MD		 270 */
271static
46839cc2 272int loglevel_str_to_value(const char *inputstr)
8005f29a 273{
46839cc2
MD		 274 int i = 0;
275 char str[LTTNG_SYMBOL_NAME_LEN];
276
e051e07c
DG		 277 /*
278 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
279 * added at the end of the loop so a the upper bound we avoid the overflow.
280 */
281 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
46839cc2
MD		 282 str[i] = toupper(inputstr[i]);
283 i++;
284 }
285 str[i] = '\0';
286 if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) {
287 return LTTNG_LOGLEVEL_EMERG;
288 } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) {
289 return LTTNG_LOGLEVEL_ALERT;
290 } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) {
291 return LTTNG_LOGLEVEL_CRIT;
292 } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) {
293 return LTTNG_LOGLEVEL_ERR;
294 } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) {
295 return LTTNG_LOGLEVEL_WARNING;
296 } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) {
297 return LTTNG_LOGLEVEL_NOTICE;
298 } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) {
299 return LTTNG_LOGLEVEL_INFO;
300 } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) {
301 return LTTNG_LOGLEVEL_DEBUG_SYSTEM;
302 } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) {
303 return LTTNG_LOGLEVEL_DEBUG_PROGRAM;
304 } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) {
305 return LTTNG_LOGLEVEL_DEBUG_PROCESS;
306 } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) {
307 return LTTNG_LOGLEVEL_DEBUG_MODULE;
308 } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) {
309 return LTTNG_LOGLEVEL_DEBUG_UNIT;
310 } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) {
311 return LTTNG_LOGLEVEL_DEBUG_FUNCTION;
312 } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) {
313 return LTTNG_LOGLEVEL_DEBUG_LINE;
314 } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) {
315 return LTTNG_LOGLEVEL_DEBUG;
8005f29a
MD		 316 } else {
317 return -1;
318 }
319}
320
85076754
MD		 321static
322const char *print_channel_name(const char *name)
323{
324 return name ? : DEFAULT_CHANNEL_NAME;
325}
326
327static
328const char *print_raw_channel_name(const char *name)
329{
330 return name ? : "<default>";
331}
332
f3ed775e 333/*
6181537c 334 * Enabling event using the lttng API.
f3ed775e 335 */
cd80958d 336static int enable_events(char *session_name)
f3ed775e 337{
85076754 338 int ret = CMD_SUCCESS, warn = 0;
b73d0b29 339 char *event_name, *channel_name = NULL;
f3ed775e 340 struct lttng_event ev;
7d29a247 341 struct lttng_domain dom;
f3ed775e 342
441c16a7
MD		 343 memset(&ev, 0, sizeof(ev));
344 memset(&dom, 0, sizeof(dom));
345
53a80697
MD		 346 if (opt_kernel) {
347 if (opt_filter) {
348 ERR("Filter not implement for kernel tracing yet");
349 ret = CMD_ERROR;
350 goto error;
351 }
67b58630
JG		 352 if (opt_loglevel) {
353 WARN("Kernel loglevels are not supported.");
354 }
53a80697
MD		 355 }
356
7d29a247
DG		 357 /* Create lttng domain */
358 if (opt_kernel) {
359 dom.type = LTTNG_DOMAIN_KERNEL;
7972aab2 360 dom.buf_type = LTTNG_BUFFER_GLOBAL;
d78d6610 361 } else if (opt_userspace) {
2bdd86d4 362 dom.type = LTTNG_DOMAIN_UST;
7972aab2 363 /* Default. */
8692d4e5 364 dom.buf_type = LTTNG_BUFFER_PER_UID;
b9dfb167
DG		 365 } else if (opt_jul) {
366 dom.type = LTTNG_DOMAIN_JUL;
367 /* Default. */
368 dom.buf_type = LTTNG_BUFFER_PER_UID;
6181537c 369 } else {
b9dfb167 370 print_missing_domain();
d16c1a4c 371 ret = CMD_ERROR;
6181537c 372 goto error;
2bdd86d4 373 }
7d29a247 374
85076754 375 channel_name = opt_channel_name;
ae856491 376
cd80958d
DG		 377 handle = lttng_create_handle(session_name, &dom);
378 if (handle == NULL) {
379 ret = -1;
380 goto error;
381 }
1aef21b6 382
cd80958d 383 if (opt_enable_all) {
8c9ae521 384 /* Default setup for enable all */
75e8c5ab
MD		 385 if (opt_kernel) {
386 ev.type = opt_event_type;
387 ev.name[0] = '\0';
300b8fd5
MD		 388 /* kernel loglevels not implemented */
389 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
75e8c5ab
MD		 390 } else {
391 ev.type = LTTNG_EVENT_TRACEPOINT;
392 strcpy(ev.name, "*");
300b8fd5
MD		 393 ev.loglevel_type = opt_loglevel_type;
394 if (opt_loglevel) {
395 ev.loglevel = loglevel_str_to_value(opt_loglevel);
396 if (ev.loglevel == -1) {
397 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 398 ret = -LTTNG_ERR_INVALID;
300b8fd5
MD		 399 goto error;
400 }
22e25b71
MD		 401 } else {
402 ev.loglevel = -1;
300b8fd5 403 }
75e8c5ab 404 }
8c9ae521 405
025faf73
DG		 406 if (!opt_filter) {
407 ret = lttng_enable_event(handle, &ev, channel_name);
408 if (ret < 0) {
409 switch (-ret) {
410 case LTTNG_ERR_KERN_EVENT_EXIST:
411 WARN("Kernel events already enabled (channel %s, session %s)",
85076754 412 print_channel_name(channel_name), session_name);
025faf73
DG		 413 break;
414 default:
415 ERR("Events: %s (channel %s, session %s)",
85076754
MD		 416 lttng_strerror(ret),
417 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
418 ? print_raw_channel_name(channel_name)
419 : print_channel_name(channel_name),
420 session_name);
025faf73
DG		 421 break;
422 }
423 goto end;
42224349 424 }
8c9ae521 425
025faf73
DG		 426 switch (opt_event_type) {
427 case LTTNG_EVENT_TRACEPOINT:
67b58630 428 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
025faf73 429 MSG("All %s tracepoints are enabled in channel %s for loglevel %s",
b9dfb167 430 get_domain_str(dom.type),
85076754 431 print_channel_name(channel_name),
025faf73
DG		 432 opt_loglevel);
433 } else {
434 MSG("All %s tracepoints are enabled in channel %s",
b9dfb167 435 get_domain_str(dom.type),
85076754 436 print_channel_name(channel_name));
025faf73
DG		 437 }
438 break;
439 case LTTNG_EVENT_SYSCALL:
440 if (opt_kernel) {
441 MSG("All kernel system calls are enabled in channel %s",
85076754 442 print_channel_name(channel_name));
025faf73
DG		 443 }
444 break;
445 case LTTNG_EVENT_ALL:
67b58630 446 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
025faf73 447 MSG("All %s events are enabled in channel %s for loglevel %s",
b9dfb167 448 get_domain_str(dom.type),
85076754 449 print_channel_name(channel_name),
025faf73
DG		 450 opt_loglevel);
451 } else {
452 MSG("All %s events are enabled in channel %s",
b9dfb167 453 get_domain_str(dom.type),
85076754 454 print_channel_name(channel_name));
025faf73
DG		 455 }
456 break;
457 default:
458 /*
459 * We should not be here since lttng_enable_event should have
460 * failed on the event type.
461 */
462 goto error;
57064ada 463 }
f3ed775e 464 }
025faf73
DG		 465 if (opt_filter) {
466 ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
16363652
DG		 467 opt_filter);
468 if (ret < 0) {
469 switch (-ret) {
470 case LTTNG_ERR_FILTER_EXIST:
85076754 471 WARN("Filter on all events is already enabled"
16363652 472 " (channel %s, session %s)",
85076754 473 print_channel_name(channel_name), session_name);
16363652
DG		 474 break;
475 default:
85076754
MD		 476 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
477 lttng_strerror(ret),
478 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
479 ? print_raw_channel_name(channel_name)
480 : print_channel_name(channel_name),
481 session_name, opt_filter);
16363652
DG		 482 break;
483 }
484 goto error;
485 } else {
486 MSG("Filter '%s' successfully set", opt_filter);
487 }
488 }
8c9ae521 489 goto end;
f3ed775e
DG		 490 }
491
492 /* Strip event list */
493 event_name = strtok(opt_event_list, ",");
494 while (event_name != NULL) {
6181537c
DG		 495 /* Copy name and type of the event */
496 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
497 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
498 ev.type = opt_event_type;
499
f3ed775e
DG		 500 /* Kernel tracer action */
501 if (opt_kernel) {
502 DBG("Enabling kernel event %s for channel %s",
85076754
MD		 503 event_name,
504 print_channel_name(channel_name));
f3ed775e
DG		 505
506 switch (opt_event_type) {
7a3d1328
MD		 507 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
508 ev.type = LTTNG_EVENT_TRACEPOINT;
509 /* Fall-through */
e6ddca71 510 case LTTNG_EVENT_TRACEPOINT:
f3ed775e 511 break;
7d29a247 512 case LTTNG_EVENT_PROBE:
cf0e5467 513 ret = parse_probe_opts(&ev, opt_probe);
0d63dd19 514 if (ret < 0) {
cf0e5467 515 ERR("Unable to parse probe options");
0d63dd19
DG		 516 ret = 0;
517 goto error;
518 }
f3ed775e
DG		 519 break;
520 case LTTNG_EVENT_FUNCTION:
8f0d098b
MD		 521 ret = parse_probe_opts(&ev, opt_function);
522 if (ret < 0) {
523 ERR("Unable to parse function probe options");
524 ret = 0;
525 goto error;
526 }
527 break;
528 case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c
DG		 529 strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
530 LTTNG_SYMBOL_NAME_LEN);
99497cd0 531 ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e 532 break;
a54bd42d 533 case LTTNG_EVENT_SYSCALL:
6181537c
DG		 534 MSG("per-syscall selection not supported yet. Use \"-a\" "
535 "for all syscalls.");
f3ed775e 536 default:
1ab1ea0b 537 ret = CMD_UNDEFINED;
f3ed775e
DG		 538 goto error;
539 }
0cda4f28 540
0cda4f28 541 /* kernel loglevels not implemented */
8005f29a 542 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
f3ed775e 543 } else if (opt_userspace) { /* User-space tracer action */
d78d6610 544#if 0
e14f64a8
DG		 545 if (opt_cmd_name != NULL || opt_pid) {
546 MSG("Only supporting tracing all UST processes (-u) for now.");
1ab1ea0b 547 ret = CMD_UNDEFINED;
2bdd86d4
MD		 548 goto error;
549 }
d78d6610 550#endif
6181537c 551
300b8fd5 552 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
85076754 553 print_channel_name(channel_name), opt_loglevel ? : "<all>");
2bdd86d4
MD		 554
555 switch (opt_event_type) {
556 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4
MD		 557 /* Fall-through */
558 case LTTNG_EVENT_TRACEPOINT:
e4baff1e
MD		 559 /* Copy name and type of the event */
560 ev.type = LTTNG_EVENT_TRACEPOINT;
561 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
562 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4
MD		 563 break;
564 case LTTNG_EVENT_PROBE:
565 case LTTNG_EVENT_FUNCTION:
566 case LTTNG_EVENT_FUNCTION_ENTRY:
567 case LTTNG_EVENT_SYSCALL:
568 default:
cc62c0c0 569 ERR("Event type not available for user-space tracing");
4ce78777 570 ret = CMD_UNSUPPORTED;
2bdd86d4
MD		 571 goto error;
572 }
0cda4f28
MD		 573
574 ev.loglevel_type = opt_loglevel_type;
ed7f4083 575 if (opt_loglevel) {
8005f29a
MD		 576 ev.loglevel = loglevel_str_to_value(opt_loglevel);
577 if (ev.loglevel == -1) {
578 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 579 ret = -LTTNG_ERR_INVALID;
8005f29a
MD		 580 goto error;
581 }
22e25b71
MD		 582 } else {
583 ev.loglevel = -1;
ed7f4083 584 }
b9dfb167
DG		 585 } else if (opt_jul) {
586 if (opt_event_type != LTTNG_EVENT_ALL &&
587 opt_event_type != LTTNG_EVENT_TRACEPOINT) {
588 ERR("Event type not supported for JUL domain.");
589 ret = CMD_UNSUPPORTED;
590 goto error;
591 }
592 ev.type = LTTNG_EVENT_TRACEPOINT;
593 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
594 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e 595 } else {
b9dfb167 596 print_missing_domain();
300b8fd5 597 ret = CMD_ERROR;
f3ed775e
DG		 598 goto error;
599 }
600
025faf73
DG		 601 if (!opt_filter) {
602 ret = lttng_enable_event(handle, &ev, channel_name);
603 if (ret < 0) {
604 /* Turn ret to positive value to handle the positive error code */
605 switch (-ret) {
606 case LTTNG_ERR_KERN_EVENT_EXIST:
607 WARN("Kernel event %s already enabled (channel %s, session %s)",
85076754
MD		 608 event_name,
609 print_channel_name(channel_name), session_name);
025faf73
DG		 610 break;
611 default:
612 ERR("Event %s: %s (channel %s, session %s)", event_name,
85076754
MD		 613 lttng_strerror(ret),
614 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
615 ? print_raw_channel_name(channel_name)
616 : print_channel_name(channel_name),
617 session_name);
025faf73
DG		 618 break;
619 }
620 warn = 1;
621 } else {
622 MSG("%s event %s created in channel %s",
b9dfb167 623 get_domain_str(dom.type), event_name,
85076754 624 print_channel_name(channel_name));
42224349 625 }
6181537c 626 }
025faf73
DG		 627
628 if (opt_filter) {
629 ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
16363652 630 opt_filter);
53a80697 631 if (ret < 0) {
7671f53c
CB		 632 switch (-ret) {
633 case LTTNG_ERR_FILTER_EXIST:
ff7ef7b8 634 WARN("Filter on event %s is already enabled"
7671f53c 635 " (channel %s, session %s)",
85076754
MD		 636 event_name,
637 print_channel_name(channel_name), session_name);
7671f53c
CB		 638 break;
639 default:
85076754
MD		 640 ERR("Event %s: %s (channel %s, session %s, filter \'%s\')", ev.name,
641 lttng_strerror(ret),
642 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
643 ? print_raw_channel_name(channel_name)
644 : print_channel_name(channel_name),
645 session_name, opt_filter);
7671f53c
CB		 646 break;
647 }
53a80697 648 goto error;
16363652
DG		 649 } else {
650 MSG("Filter '%s' successfully set", opt_filter);
53a80697
MD		 651 }
652 }
6181537c 653
f3ed775e
DG		 654 /* Next event */
655 event_name = strtok(NULL, ",");
656 }
657
8c9ae521 658end:
f3ed775e 659error:
ae856491
DG		 660 if (warn) {
661 ret = CMD_WARNING;
662 }
cd80958d
DG		 663 lttng_destroy_handle(handle);
664
f3ed775e
DG		 665 return ret;
666}
667
668/*
6181537c 669 * Add event to trace session
f3ed775e
DG		 670 */
671int cmd_enable_events(int argc, const char **argv)
672{
ca1c3607 673 int opt, ret = CMD_SUCCESS;
f3ed775e 674 static poptContext pc;
cd80958d 675 char *session_name = NULL;
de044b7a 676 int event_type = -1;
f3ed775e
DG		 677
678 pc = poptGetContext(NULL, argc, argv, long_options, 0);
679 poptReadDefaultConfig(pc, 0);
680
681 /* Default event type */
7a3d1328 682 opt_event_type = LTTNG_EVENT_ALL;
f3ed775e
DG		 683
684 while ((opt = poptGetNextOpt(pc)) != -1) {
685 switch (opt) {
686 case OPT_HELP:
ca1c3607 687 usage(stdout);
f3ed775e 688 goto end;
f3ed775e 689 case OPT_TRACEPOINT:
e6ddca71 690 opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e 691 break;
cf0e5467 692 case OPT_PROBE:
7d29a247 693 opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e
DG		 694 break;
695 case OPT_FUNCTION:
696 opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b
MD		 697 break;
698 case OPT_FUNCTION_ENTRY:
699 opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e 700 break;
a54bd42d
MD		 701 case OPT_SYSCALL:
702 opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199 703 break;
eeac7d46
MD		 704 case OPT_USERSPACE:
705 opt_userspace = 1;
eeac7d46 706 break;
0cda4f28 707 case OPT_LOGLEVEL:
8005f29a 708 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
0cda4f28
MD		 709 opt_loglevel = poptGetOptArg(pc);
710 break;
711 case OPT_LOGLEVEL_ONLY:
8005f29a 712 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
0cda4f28 713 opt_loglevel = poptGetOptArg(pc);
13dce3b7 714 break;
679b4943
SM		 715 case OPT_LIST_OPTIONS:
716 list_cmd_options(stdout, long_options);
679b4943 717 goto end;
53a80697
MD		 718 case OPT_FILTER:
719 break;
fac3366c
JI		 720 case OPT_EXCLUDE:
721 break;
f3ed775e
DG		 722 default:
723 usage(stderr);
724 ret = CMD_UNDEFINED;
725 goto end;
726 }
de044b7a
DG		 727
728 /* Validate event type. Multiple event type are not supported. */
729 if (event_type == -1) {
730 event_type = opt_event_type;
731 } else {
732 if (event_type != opt_event_type) {
733 ERR("Multiple event type not supported.");
734 ret = CMD_ERROR;
735 goto end;
736 }
737 }
f3ed775e
DG		 738 }
739
740 opt_event_list = (char*) poptGetArg(pc);
741 if (opt_event_list == NULL && opt_enable_all == 0) {
742 ERR("Missing event name(s).\n");
743 usage(stderr);
ca1c3607 744 ret = CMD_ERROR;
f3ed775e
DG		 745 goto end;
746 }
747
cd80958d
DG		 748 if (!opt_session_name) {
749 session_name = get_session_name();
750 if (session_name == NULL) {
ca1c3607 751 ret = CMD_ERROR;
cd80958d
DG		 752 goto end;
753 }
754 } else {
755 session_name = opt_session_name;
756 }
757
758 ret = enable_events(session_name);
f3ed775e
DG		 759
760end:
cd80958d
DG		 761 if (opt_session_name == NULL) {
762 free(session_name);
763 }
764
ca1c3607 765 poptFreeContext(pc);
f3ed775e
DG		 766 return ret;
767}
LTTng 2.0 tools and control repository
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