Commit | Line | Data |
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f3ed775e DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
6 | * as published by the Free Software Foundation; only version 2 |
7 | * of the License. | |
f3ed775e DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <popt.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <sys/stat.h> | |
25 | #include <sys/types.h> | |
26 | #include <unistd.h> | |
5a0de755 | 27 | #include <inttypes.h> |
8f0d098b | 28 | #include <ctype.h> |
f3ed775e | 29 | |
6e2d116c DG |
30 | #include "../cmd.h" |
31 | #include "../conf.h" | |
32 | #include "../utils.h" | |
f3ed775e DG |
33 | |
34 | static char *opt_event_list; | |
35 | static int opt_event_type; | |
36 | static char *opt_kernel; | |
37 | static char *opt_cmd_name; | |
5440dc42 | 38 | static char *opt_session_name; |
f3ed775e DG |
39 | static int opt_pid_all; |
40 | static int opt_userspace; | |
41 | static int opt_enable_all; | |
42 | static pid_t opt_pid; | |
cf0e5467 | 43 | static char *opt_probe; |
8f0d098b MD |
44 | static char *opt_function; |
45 | static char *opt_function_entry_symbol; | |
f3ed775e DG |
46 | static char *opt_channel_name; |
47 | ||
48 | enum { | |
49 | OPT_HELP = 1, | |
50 | OPT_USERSPACE, | |
51 | OPT_TRACEPOINT, | |
52 | OPT_MARKER, | |
cf0e5467 | 53 | OPT_PROBE, |
f3ed775e | 54 | OPT_FUNCTION, |
8f0d098b | 55 | OPT_FUNCTION_ENTRY, |
f3ed775e DG |
56 | }; |
57 | ||
cd80958d DG |
58 | static struct lttng_handle *handle; |
59 | ||
f3ed775e DG |
60 | static struct poptOption long_options[] = { |
61 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
62 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
5440dc42 | 63 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
f3ed775e DG |
64 | {"all-events", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0}, |
65 | {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0}, | |
66 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, | |
67 | {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, 0, OPT_USERSPACE, 0, 0}, | |
68 | {"all", 0, POPT_ARG_VAL, &opt_pid_all, 1, 0, 0}, | |
69 | {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, | |
70 | {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0}, | |
71 | {"marker", 0, POPT_ARG_NONE, 0, OPT_MARKER, 0, 0}, | |
cf0e5467 | 72 | {"probe", 0, POPT_ARG_STRING, 0, OPT_PROBE, 0, 0}, |
f3ed775e | 73 | {"function", 0, POPT_ARG_STRING, 0, OPT_FUNCTION, 0, 0}, |
8f0d098b | 74 | {"function:entry", 0, POPT_ARG_STRING, 0, OPT_FUNCTION_ENTRY, 0, 0}, |
f3ed775e DG |
75 | {0, 0, 0, 0, 0, 0, 0} |
76 | }; | |
77 | ||
78 | /* | |
79 | * usage | |
80 | */ | |
81 | static void usage(FILE *ofp) | |
82 | { | |
83 | fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n"); | |
84 | fprintf(ofp, "\n"); | |
85 | fprintf(ofp, " -h, --help Show this help\n"); | |
5440dc42 | 86 | fprintf(ofp, " -s, --session Apply on session name\n"); |
f3ed775e DG |
87 | fprintf(ofp, " -c, --channel Apply on this channel\n"); |
88 | fprintf(ofp, " -a, --all-events Enable all tracepoints\n"); | |
89 | fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n"); | |
90 | fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n"); | |
91 | fprintf(ofp, " --all If -u, apply on all traceable apps\n"); | |
92 | fprintf(ofp, " -p, --pid PID If -u, apply on a specific PID\n"); | |
93 | fprintf(ofp, "\n"); | |
94 | fprintf(ofp, "Event options:\n"); | |
95 | fprintf(ofp, " --tracepoint Tracepoint event (default)\n"); | |
8f0d098b | 96 | fprintf(ofp, " --probe [addr | symbol | symbol+offset]\n"); |
cf0e5467 MD |
97 | fprintf(ofp, " Dynamic probe.\n"); |
98 | fprintf(ofp, " Addr and offset can be octal (0NNN...),\n"); | |
99 | fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n"); | |
8f0d098b MD |
100 | fprintf(ofp, " --function [addr | symbol | symbol+offset]\n"); |
101 | fprintf(ofp, " Dynamic function entry/return probe.\n"); | |
102 | fprintf(ofp, " Addr and offset can be octal (0NNN...),\n"); | |
103 | fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n"); | |
104 | fprintf(ofp, " --function:entry symbol\n"); | |
105 | fprintf(ofp, " Function tracer event\n"); | |
f3ed775e DG |
106 | fprintf(ofp, " --marker User-space marker (deprecated)\n"); |
107 | fprintf(ofp, "\n"); | |
108 | } | |
109 | ||
0d63dd19 | 110 | /* |
cf0e5467 | 111 | * parse_probe_addr |
0d63dd19 | 112 | * |
cf0e5467 | 113 | * Parse probe options. |
0d63dd19 | 114 | */ |
cf0e5467 | 115 | static int parse_probe_opts(struct lttng_event *ev, char *opt) |
0d63dd19 DG |
116 | { |
117 | int ret; | |
8ff0bbd0 | 118 | char s_hex[19]; |
0d63dd19 DG |
119 | char name[LTTNG_SYMBOL_NAME_LEN]; |
120 | ||
121 | if (opt == NULL) { | |
122 | ret = -1; | |
8f0d098b | 123 | goto end; |
0d63dd19 DG |
124 | } |
125 | ||
126 | /* Check for symbol+offset */ | |
8ff0bbd0 | 127 | ret = sscanf(opt, "%[^'+']+%s", name, s_hex); |
0d63dd19 | 128 | if (ret == 2) { |
7d29a247 | 129 | strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN); |
99497cd0 | 130 | ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
cf0e5467 | 131 | DBG("probe symbol %s", ev->attr.probe.symbol_name); |
8ff0bbd0 DG |
132 | if (strlen(s_hex) == 0) { |
133 | ERR("Invalid probe offset %s", s_hex); | |
0d63dd19 | 134 | ret = -1; |
8f0d098b | 135 | goto end; |
0d63dd19 | 136 | } |
8ff0bbd0 | 137 | ev->attr.probe.offset = strtoul(s_hex, NULL, 0); |
cf0e5467 | 138 | DBG("probe offset %" PRIu64, ev->attr.probe.offset); |
3000dc78 | 139 | ev->attr.probe.addr = 0; |
8f0d098b MD |
140 | goto end; |
141 | } | |
142 | ||
143 | /* Check for symbol */ | |
144 | if (isalpha(name[0])) { | |
145 | ret = sscanf(opt, "%s", name); | |
146 | if (ret == 1) { | |
147 | strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN); | |
99497cd0 | 148 | ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
8f0d098b MD |
149 | DBG("probe symbol %s", ev->attr.probe.symbol_name); |
150 | ev->attr.probe.offset = 0; | |
151 | DBG("probe offset %" PRIu64, ev->attr.probe.offset); | |
152 | ev->attr.probe.addr = 0; | |
153 | goto end; | |
154 | } | |
0d63dd19 DG |
155 | } |
156 | ||
157 | /* Check for address */ | |
8ff0bbd0 | 158 | ret = sscanf(opt, "%s", s_hex); |
0d63dd19 | 159 | if (ret > 0) { |
8ff0bbd0 DG |
160 | if (strlen(s_hex) == 0) { |
161 | ERR("Invalid probe address %s", s_hex); | |
0d63dd19 | 162 | ret = -1; |
8f0d098b | 163 | goto end; |
0d63dd19 | 164 | } |
8ff0bbd0 | 165 | ev->attr.probe.addr = strtoul(s_hex, NULL, 0); |
cf0e5467 | 166 | DBG("probe addr %" PRIu64, ev->attr.probe.addr); |
3000dc78 DG |
167 | ev->attr.probe.offset = 0; |
168 | memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN); | |
8f0d098b | 169 | goto end; |
0d63dd19 DG |
170 | } |
171 | ||
172 | /* No match */ | |
173 | ret = -1; | |
174 | ||
8f0d098b | 175 | end: |
0d63dd19 DG |
176 | return ret; |
177 | } | |
178 | ||
f3ed775e DG |
179 | /* |
180 | * enable_events | |
181 | * | |
182 | * Enabling event using the lttng API. | |
183 | */ | |
cd80958d | 184 | static int enable_events(char *session_name) |
f3ed775e DG |
185 | { |
186 | int err, ret = CMD_SUCCESS; | |
b73d0b29 | 187 | char *event_name, *channel_name = NULL; |
f3ed775e | 188 | struct lttng_event ev; |
7d29a247 | 189 | struct lttng_domain dom; |
f3ed775e | 190 | |
f3ed775e DG |
191 | if (opt_channel_name == NULL) { |
192 | err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME); | |
193 | if (err < 0) { | |
194 | ret = CMD_FATAL; | |
195 | goto error; | |
196 | } | |
197 | } else { | |
198 | channel_name = opt_channel_name; | |
199 | } | |
200 | ||
7d29a247 DG |
201 | /* Create lttng domain */ |
202 | if (opt_kernel) { | |
203 | dom.type = LTTNG_DOMAIN_KERNEL; | |
204 | } | |
205 | ||
cd80958d DG |
206 | handle = lttng_create_handle(session_name, &dom); |
207 | if (handle == NULL) { | |
208 | ret = -1; | |
209 | goto error; | |
210 | } | |
1aef21b6 | 211 | |
cd80958d | 212 | if (opt_enable_all) { |
f3ed775e | 213 | if (opt_kernel) { |
cd80958d | 214 | ret = lttng_enable_event(handle, NULL, channel_name); |
c93d9daf DG |
215 | if (ret == 0) { |
216 | MSG("All kernel events are enabled in channel %s", channel_name); | |
217 | } | |
f3ed775e DG |
218 | goto error; |
219 | } | |
220 | ||
221 | /* TODO: User-space tracer */ | |
222 | } | |
223 | ||
224 | /* Strip event list */ | |
225 | event_name = strtok(opt_event_list, ","); | |
226 | while (event_name != NULL) { | |
227 | /* Kernel tracer action */ | |
228 | if (opt_kernel) { | |
229 | DBG("Enabling kernel event %s for channel %s", | |
230 | event_name, channel_name); | |
231 | /* Copy name and type of the event */ | |
232 | strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN); | |
99497cd0 | 233 | ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
f3ed775e DG |
234 | ev.type = opt_event_type; |
235 | ||
236 | switch (opt_event_type) { | |
e6ddca71 | 237 | case LTTNG_EVENT_TRACEPOINT: |
f3ed775e | 238 | break; |
7d29a247 | 239 | case LTTNG_EVENT_PROBE: |
cf0e5467 | 240 | ret = parse_probe_opts(&ev, opt_probe); |
0d63dd19 | 241 | if (ret < 0) { |
cf0e5467 | 242 | ERR("Unable to parse probe options"); |
0d63dd19 DG |
243 | ret = 0; |
244 | goto error; | |
245 | } | |
f3ed775e DG |
246 | break; |
247 | case LTTNG_EVENT_FUNCTION: | |
8f0d098b MD |
248 | ret = parse_probe_opts(&ev, opt_function); |
249 | if (ret < 0) { | |
250 | ERR("Unable to parse function probe options"); | |
251 | ret = 0; | |
252 | goto error; | |
253 | } | |
254 | break; | |
255 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
256 | strncpy(ev.attr.ftrace.symbol_name, | |
257 | opt_function_entry_symbol, | |
258 | LTTNG_SYMBOL_NAME_LEN); | |
99497cd0 | 259 | ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
f3ed775e DG |
260 | break; |
261 | default: | |
262 | ret = CMD_NOT_IMPLEMENTED; | |
263 | goto error; | |
264 | } | |
265 | ||
cd80958d | 266 | ret = lttng_enable_event(handle, &ev, channel_name); |
7d29a247 | 267 | if (ret == 0) { |
f3ed775e DG |
268 | MSG("Kernel event %s created in channel %s", event_name, channel_name); |
269 | } | |
270 | } else if (opt_userspace) { /* User-space tracer action */ | |
271 | /* | |
272 | * TODO: Waiting on lttng UST 2.0 | |
273 | */ | |
274 | if (opt_pid_all) { | |
275 | } else if (opt_pid != 0) { | |
276 | } | |
277 | ret = CMD_NOT_IMPLEMENTED; | |
278 | goto error; | |
279 | } else { | |
048e2159 | 280 | ERR("Please specify a tracer (--kernel or --userspace)"); |
f3ed775e DG |
281 | goto error; |
282 | } | |
283 | ||
284 | /* Next event */ | |
285 | event_name = strtok(NULL, ","); | |
286 | } | |
287 | ||
288 | error: | |
b73d0b29 MD |
289 | if (opt_channel_name == NULL) { |
290 | free(channel_name); | |
291 | } | |
cd80958d DG |
292 | lttng_destroy_handle(handle); |
293 | ||
f3ed775e DG |
294 | return ret; |
295 | } | |
296 | ||
297 | /* | |
298 | * cmd_enable_events | |
299 | * | |
300 | * Add event to trace session | |
301 | */ | |
302 | int cmd_enable_events(int argc, const char **argv) | |
303 | { | |
304 | int opt, ret; | |
305 | static poptContext pc; | |
cd80958d | 306 | char *session_name = NULL; |
f3ed775e DG |
307 | |
308 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
309 | poptReadDefaultConfig(pc, 0); | |
310 | ||
311 | /* Default event type */ | |
e6ddca71 | 312 | opt_event_type = LTTNG_EVENT_TRACEPOINT; |
f3ed775e DG |
313 | |
314 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
315 | switch (opt) { | |
316 | case OPT_HELP: | |
317 | usage(stderr); | |
318 | ret = CMD_SUCCESS; | |
319 | goto end; | |
320 | case OPT_USERSPACE: | |
321 | opt_userspace = 1; | |
322 | opt_cmd_name = poptGetOptArg(pc); | |
323 | break; | |
324 | case OPT_TRACEPOINT: | |
e6ddca71 | 325 | opt_event_type = LTTNG_EVENT_TRACEPOINT; |
f3ed775e DG |
326 | break; |
327 | case OPT_MARKER: | |
328 | ret = CMD_NOT_IMPLEMENTED; | |
329 | goto end; | |
cf0e5467 | 330 | case OPT_PROBE: |
7d29a247 | 331 | opt_event_type = LTTNG_EVENT_PROBE; |
cf0e5467 | 332 | opt_probe = poptGetOptArg(pc); |
f3ed775e DG |
333 | break; |
334 | case OPT_FUNCTION: | |
335 | opt_event_type = LTTNG_EVENT_FUNCTION; | |
8f0d098b MD |
336 | opt_function = poptGetOptArg(pc); |
337 | break; | |
338 | case OPT_FUNCTION_ENTRY: | |
339 | opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY; | |
340 | opt_function_entry_symbol = poptGetOptArg(pc); | |
f3ed775e DG |
341 | break; |
342 | default: | |
343 | usage(stderr); | |
344 | ret = CMD_UNDEFINED; | |
345 | goto end; | |
346 | } | |
347 | } | |
348 | ||
349 | opt_event_list = (char*) poptGetArg(pc); | |
350 | if (opt_event_list == NULL && opt_enable_all == 0) { | |
351 | ERR("Missing event name(s).\n"); | |
352 | usage(stderr); | |
353 | ret = CMD_SUCCESS; | |
354 | goto end; | |
355 | } | |
356 | ||
cd80958d DG |
357 | if (!opt_session_name) { |
358 | session_name = get_session_name(); | |
359 | if (session_name == NULL) { | |
360 | ret = -1; | |
361 | goto end; | |
362 | } | |
363 | } else { | |
364 | session_name = opt_session_name; | |
365 | } | |
366 | ||
367 | ret = enable_events(session_name); | |
f3ed775e DG |
368 | |
369 | end: | |
cd80958d DG |
370 | if (opt_session_name == NULL) { |
371 | free(session_name); | |
372 | } | |
373 | ||
f3ed775e DG |
374 | return ret; |
375 | } |