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Fix: null dereference on error path for create_ctx_type
[lttng-tools.git] / src / bin / lttng / commands / add_context.c
1 /*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2 only,
7 * as published by the Free Software Foundation.
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 along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #define _LGPL_SOURCE
20 #include <ctype.h>
21 #include <popt.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <sys/stat.h>
26 #include <sys/types.h>
27 #include <unistd.h>
28 #include <assert.h>
29
30 #include <urcu/list.h>
31
32 #include <common/mi-lttng.h>
33
34 #include "../command.h"
35
36 static char *opt_channel_name;
37 static char *opt_session_name;
38 static int opt_kernel;
39 static int opt_userspace;
40 static int opt_jul;
41 static int opt_log4j;
42 static char *opt_type;
43
44 enum {
45 OPT_HELP = 1,
46 OPT_TYPE,
47 OPT_USERSPACE,
48 OPT_JUL,
49 OPT_LOG4J,
50 OPT_LIST_OPTIONS,
51 OPT_LIST,
52 };
53
54 static struct lttng_handle *handle;
55 static struct mi_writer *writer;
56
57 /*
58 * Taken from the LTTng ABI
59 */
60 enum context_type {
61 CONTEXT_PID = 0,
62 CONTEXT_PERF_COUNTER = 1, /* Backward compat. */
63 CONTEXT_PROCNAME = 2,
64 CONTEXT_PRIO = 3,
65 CONTEXT_NICE = 4,
66 CONTEXT_VPID = 5,
67 CONTEXT_TID = 6,
68 CONTEXT_VTID = 7,
69 CONTEXT_PPID = 8,
70 CONTEXT_VPPID = 9,
71 CONTEXT_PTHREAD_ID = 10,
72 CONTEXT_HOSTNAME = 11,
73 CONTEXT_IP = 12,
74 CONTEXT_PERF_CPU_COUNTER = 13,
75 CONTEXT_PERF_THREAD_COUNTER = 14,
76 CONTEXT_APP_CONTEXT = 15,
77 CONTEXT_INTERRUPTIBLE = 16,
78 CONTEXT_PREEMPTIBLE = 17,
79 CONTEXT_NEED_RESCHEDULE = 18,
80 CONTEXT_MIGRATABLE = 19,
81 };
82
83 /*
84 * Taken from the Perf ABI (all enum perf_*)
85 */
86 enum perf_type {
87 PERF_TYPE_HARDWARE = 0,
88 PERF_TYPE_SOFTWARE = 1,
89 PERF_TYPE_HW_CACHE = 3,
90 PERF_TYPE_RAW = 4,
91 };
92
93 enum perf_count_hard {
94 PERF_COUNT_HW_CPU_CYCLES = 0,
95 PERF_COUNT_HW_INSTRUCTIONS = 1,
96 PERF_COUNT_HW_CACHE_REFERENCES = 2,
97 PERF_COUNT_HW_CACHE_MISSES = 3,
98 PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4,
99 PERF_COUNT_HW_BRANCH_MISSES = 5,
100 PERF_COUNT_HW_BUS_CYCLES = 6,
101 PERF_COUNT_HW_STALLED_CYCLES_FRONTEND = 7,
102 PERF_COUNT_HW_STALLED_CYCLES_BACKEND = 8,
103 };
104
105 enum perf_count_soft {
106 PERF_COUNT_SW_CPU_CLOCK = 0,
107 PERF_COUNT_SW_TASK_CLOCK = 1,
108 PERF_COUNT_SW_PAGE_FAULTS = 2,
109 PERF_COUNT_SW_CONTEXT_SWITCHES = 3,
110 PERF_COUNT_SW_CPU_MIGRATIONS = 4,
111 PERF_COUNT_SW_PAGE_FAULTS_MIN = 5,
112 PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6,
113 PERF_COUNT_SW_ALIGNMENT_FAULTS = 7,
114 PERF_COUNT_SW_EMULATION_FAULTS = 8,
115 };
116
117 /*
118 * Generalized hardware cache events:
119 *
120 * { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x
121 * { read, write, prefetch } x
122 * { accesses, misses }
123 */
124 enum perf_hw_cache_id {
125 PERF_COUNT_HW_CACHE_L1D = 0,
126 PERF_COUNT_HW_CACHE_L1I = 1,
127 PERF_COUNT_HW_CACHE_LL = 2,
128 PERF_COUNT_HW_CACHE_DTLB = 3,
129 PERF_COUNT_HW_CACHE_ITLB = 4,
130 PERF_COUNT_HW_CACHE_BPU = 5,
131
132 PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
133 };
134
135 enum perf_hw_cache_op_id {
136 PERF_COUNT_HW_CACHE_OP_READ = 0,
137 PERF_COUNT_HW_CACHE_OP_WRITE = 1,
138 PERF_COUNT_HW_CACHE_OP_PREFETCH = 2,
139
140 PERF_COUNT_HW_CACHE_OP_MAX, /* non-ABI */
141 };
142
143 enum perf_hw_cache_op_result_id {
144 PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0,
145 PERF_COUNT_HW_CACHE_RESULT_MISS = 1,
146
147 PERF_COUNT_HW_CACHE_RESULT_MAX, /* non-ABI */
148 };
149
150 static struct poptOption long_options[] = {
151 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
152 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
153 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
154 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
155 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
156 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
157 {"jul", 'j', POPT_ARG_NONE, 0, OPT_JUL, 0, 0},
158 {"log4j", 'l', POPT_ARG_NONE, 0, OPT_LOG4J, 0, 0},
159 {"type", 't', POPT_ARG_STRING, &opt_type, OPT_TYPE, 0, 0},
160 {"list", 0, POPT_ARG_NONE, NULL, OPT_LIST, NULL, NULL},
161 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
162 {0, 0, 0, 0, 0, 0, 0}
163 };
164
165 /*
166 * Context options
167 */
168 #define PERF_HW(optstr, name, type, hide) \
169 { \
170 optstr, type, hide, \
171 .u.perf = { PERF_TYPE_HARDWARE, PERF_COUNT_HW_##name, },\
172 }
173
174 #define PERF_SW(optstr, name, type, hide) \
175 { \
176 optstr, type, hide, \
177 .u.perf = { PERF_TYPE_SOFTWARE, PERF_COUNT_SW_##name, },\
178 }
179
180 #define _PERF_HW_CACHE(optstr, name, type, op, result, hide) \
181 { \
182 optstr, type, hide, \
183 .u.perf = { \
184 PERF_TYPE_HW_CACHE, \
185 (uint64_t) PERF_COUNT_HW_CACHE_##name \
186 | ((uint64_t) PERF_COUNT_HW_CACHE_OP_##op << 8) \
187 | ((uint64_t) PERF_COUNT_HW_CACHE_RESULT_##result << 16), \
188 }, \
189 }
190
191 #define PERF_HW_CACHE(optstr, name, type, hide) \
192 _PERF_HW_CACHE(optstr "-loads", name, type, \
193 READ, ACCESS, hide), \
194 _PERF_HW_CACHE(optstr "-load-misses", name, type, \
195 READ, MISS, hide), \
196 _PERF_HW_CACHE(optstr "-stores", name, type, \
197 WRITE, ACCESS, hide), \
198 _PERF_HW_CACHE(optstr "-store-misses", name, type, \
199 WRITE, MISS, hide), \
200 _PERF_HW_CACHE(optstr "-prefetches", name, type, \
201 PREFETCH, ACCESS, hide), \
202 _PERF_HW_CACHE(optstr "-prefetch-misses", name, type, \
203 PREFETCH, MISS, hide)
204
205 static
206 const struct ctx_opts {
207 char *symbol;
208 enum context_type ctx_type;
209 int hide_help; /* Hide from --help */
210 union {
211 struct {
212 uint32_t type;
213 uint64_t config;
214 } perf;
215 struct {
216 char *provider_name;
217 char *ctx_name;
218 } app_ctx;
219 } u;
220 } ctx_opts[] = {
221 { "pid", CONTEXT_PID },
222 { "procname", CONTEXT_PROCNAME },
223 { "prio", CONTEXT_PRIO },
224 { "nice", CONTEXT_NICE },
225 { "vpid", CONTEXT_VPID },
226 { "tid", CONTEXT_TID },
227 { "pthread_id", CONTEXT_PTHREAD_ID },
228 { "vtid", CONTEXT_VTID },
229 { "ppid", CONTEXT_PPID },
230 { "vppid", CONTEXT_VPPID },
231 { "hostname", CONTEXT_HOSTNAME },
232 { "ip", CONTEXT_IP },
233 { "interruptible", CONTEXT_INTERRUPTIBLE },
234 { "preemptible", CONTEXT_PREEMPTIBLE },
235 { "need_reschedule", CONTEXT_NEED_RESCHEDULE },
236 { "migratable", CONTEXT_MIGRATABLE },
237
238 /* Perf options */
239
240 /* Perf per-CPU counters */
241 PERF_HW("perf:cpu:cpu-cycles", CPU_CYCLES,
242 CONTEXT_PERF_CPU_COUNTER, 0),
243 PERF_HW("perf:cpu:cycles", CPU_CYCLES,
244 CONTEXT_PERF_CPU_COUNTER, 0),
245 PERF_HW("perf:cpu:stalled-cycles-frontend", STALLED_CYCLES_FRONTEND,
246 CONTEXT_PERF_CPU_COUNTER, 0),
247 PERF_HW("perf:cpu:idle-cycles-frontend", STALLED_CYCLES_FRONTEND,
248 CONTEXT_PERF_CPU_COUNTER, 0),
249 PERF_HW("perf:cpu:stalled-cycles-backend", STALLED_CYCLES_BACKEND,
250 CONTEXT_PERF_CPU_COUNTER, 0),
251 PERF_HW("perf:cpu:idle-cycles-backend", STALLED_CYCLES_BACKEND,
252 CONTEXT_PERF_CPU_COUNTER, 0),
253 PERF_HW("perf:cpu:instructions", INSTRUCTIONS,
254 CONTEXT_PERF_CPU_COUNTER, 0),
255 PERF_HW("perf:cpu:cache-references", CACHE_REFERENCES,
256 CONTEXT_PERF_CPU_COUNTER, 0),
257 PERF_HW("perf:cpu:cache-misses", CACHE_MISSES,
258 CONTEXT_PERF_CPU_COUNTER, 0),
259 PERF_HW("perf:cpu:branch-instructions", BRANCH_INSTRUCTIONS,
260 CONTEXT_PERF_CPU_COUNTER, 0),
261 PERF_HW("perf:cpu:branches", BRANCH_INSTRUCTIONS,
262 CONTEXT_PERF_CPU_COUNTER, 0),
263 PERF_HW("perf:cpu:branch-misses", BRANCH_MISSES,
264 CONTEXT_PERF_CPU_COUNTER, 0),
265 PERF_HW("perf:cpu:bus-cycles", BUS_CYCLES,
266 CONTEXT_PERF_CPU_COUNTER, 0),
267
268 PERF_HW_CACHE("perf:cpu:L1-dcache", L1D,
269 CONTEXT_PERF_CPU_COUNTER, 0),
270 PERF_HW_CACHE("perf:cpu:L1-icache", L1I,
271 CONTEXT_PERF_CPU_COUNTER, 0),
272 PERF_HW_CACHE("perf:cpu:LLC", LL,
273 CONTEXT_PERF_CPU_COUNTER, 0),
274 PERF_HW_CACHE("perf:cpu:dTLB", DTLB,
275 CONTEXT_PERF_CPU_COUNTER, 0),
276 _PERF_HW_CACHE("perf:cpu:iTLB-loads", ITLB,
277 CONTEXT_PERF_CPU_COUNTER, READ, ACCESS, 0),
278 _PERF_HW_CACHE("perf:cpu:iTLB-load-misses", ITLB,
279 CONTEXT_PERF_CPU_COUNTER, READ, MISS, 0),
280 _PERF_HW_CACHE("perf:cpu:branch-loads", BPU,
281 CONTEXT_PERF_CPU_COUNTER, READ, ACCESS, 0),
282 _PERF_HW_CACHE("perf:cpu:branch-load-misses", BPU,
283 CONTEXT_PERF_CPU_COUNTER, READ, MISS, 0),
284
285 PERF_SW("perf:cpu:cpu-clock", CPU_CLOCK,
286 CONTEXT_PERF_CPU_COUNTER, 0),
287 PERF_SW("perf:cpu:task-clock", TASK_CLOCK,
288 CONTEXT_PERF_CPU_COUNTER, 0),
289 PERF_SW("perf:cpu:page-fault", PAGE_FAULTS,
290 CONTEXT_PERF_CPU_COUNTER, 0),
291 PERF_SW("perf:cpu:faults", PAGE_FAULTS,
292 CONTEXT_PERF_CPU_COUNTER, 0),
293 PERF_SW("perf:cpu:major-faults", PAGE_FAULTS_MAJ,
294 CONTEXT_PERF_CPU_COUNTER, 0),
295 PERF_SW("perf:cpu:minor-faults", PAGE_FAULTS_MIN,
296 CONTEXT_PERF_CPU_COUNTER, 0),
297 PERF_SW("perf:cpu:context-switches", CONTEXT_SWITCHES,
298 CONTEXT_PERF_CPU_COUNTER, 0),
299 PERF_SW("perf:cpu:cs", CONTEXT_SWITCHES,
300 CONTEXT_PERF_CPU_COUNTER, 0),
301 PERF_SW("perf:cpu:cpu-migrations", CPU_MIGRATIONS,
302 CONTEXT_PERF_CPU_COUNTER, 0),
303 PERF_SW("perf:cpu:migrations", CPU_MIGRATIONS,
304 CONTEXT_PERF_CPU_COUNTER, 0),
305 PERF_SW("perf:cpu:alignment-faults", ALIGNMENT_FAULTS,
306 CONTEXT_PERF_CPU_COUNTER, 0),
307 PERF_SW("perf:cpu:emulation-faults", EMULATION_FAULTS,
308 CONTEXT_PERF_CPU_COUNTER, 0),
309
310 /* Perf per-thread counters */
311 PERF_HW("perf:thread:cpu-cycles", CPU_CYCLES,
312 CONTEXT_PERF_THREAD_COUNTER, 0),
313 PERF_HW("perf:thread:cycles", CPU_CYCLES,
314 CONTEXT_PERF_THREAD_COUNTER, 0),
315 PERF_HW("perf:thread:stalled-cycles-frontend", STALLED_CYCLES_FRONTEND,
316 CONTEXT_PERF_THREAD_COUNTER, 0),
317 PERF_HW("perf:thread:idle-cycles-frontend", STALLED_CYCLES_FRONTEND,
318 CONTEXT_PERF_THREAD_COUNTER, 0),
319 PERF_HW("perf:thread:stalled-cycles-backend", STALLED_CYCLES_BACKEND,
320 CONTEXT_PERF_THREAD_COUNTER, 0),
321 PERF_HW("perf:thread:idle-cycles-backend", STALLED_CYCLES_BACKEND,
322 CONTEXT_PERF_THREAD_COUNTER, 0),
323 PERF_HW("perf:thread:instructions", INSTRUCTIONS,
324 CONTEXT_PERF_THREAD_COUNTER, 0),
325 PERF_HW("perf:thread:cache-references", CACHE_REFERENCES,
326 CONTEXT_PERF_THREAD_COUNTER, 0),
327 PERF_HW("perf:thread:cache-misses", CACHE_MISSES,
328 CONTEXT_PERF_THREAD_COUNTER, 0),
329 PERF_HW("perf:thread:branch-instructions", BRANCH_INSTRUCTIONS,
330 CONTEXT_PERF_THREAD_COUNTER, 0),
331 PERF_HW("perf:thread:branches", BRANCH_INSTRUCTIONS,
332 CONTEXT_PERF_THREAD_COUNTER, 0),
333 PERF_HW("perf:thread:branch-misses", BRANCH_MISSES,
334 CONTEXT_PERF_THREAD_COUNTER, 0),
335 PERF_HW("perf:thread:bus-cycles", BUS_CYCLES,
336 CONTEXT_PERF_THREAD_COUNTER, 0),
337
338 PERF_HW_CACHE("perf:thread:L1-dcache", L1D,
339 CONTEXT_PERF_THREAD_COUNTER, 0),
340 PERF_HW_CACHE("perf:thread:L1-icache", L1I,
341 CONTEXT_PERF_THREAD_COUNTER, 0),
342 PERF_HW_CACHE("perf:thread:LLC", LL,
343 CONTEXT_PERF_THREAD_COUNTER, 0),
344 PERF_HW_CACHE("perf:thread:dTLB", DTLB,
345 CONTEXT_PERF_THREAD_COUNTER, 0),
346 _PERF_HW_CACHE("perf:thread:iTLB-loads", ITLB,
347 CONTEXT_PERF_THREAD_COUNTER, READ, ACCESS, 0),
348 _PERF_HW_CACHE("perf:thread:iTLB-load-misses", ITLB,
349 CONTEXT_PERF_THREAD_COUNTER, READ, MISS, 0),
350 _PERF_HW_CACHE("perf:thread:branch-loads", BPU,
351 CONTEXT_PERF_THREAD_COUNTER, READ, ACCESS, 0),
352 _PERF_HW_CACHE("perf:thread:branch-load-misses", BPU,
353 CONTEXT_PERF_THREAD_COUNTER, READ, MISS, 0),
354
355 PERF_SW("perf:thread:cpu-clock", CPU_CLOCK,
356 CONTEXT_PERF_THREAD_COUNTER, 0),
357 PERF_SW("perf:thread:task-clock", TASK_CLOCK,
358 CONTEXT_PERF_THREAD_COUNTER, 0),
359 PERF_SW("perf:thread:page-fault", PAGE_FAULTS,
360 CONTEXT_PERF_THREAD_COUNTER, 0),
361 PERF_SW("perf:thread:faults", PAGE_FAULTS,
362 CONTEXT_PERF_THREAD_COUNTER, 0),
363 PERF_SW("perf:thread:major-faults", PAGE_FAULTS_MAJ,
364 CONTEXT_PERF_THREAD_COUNTER, 0),
365 PERF_SW("perf:thread:minor-faults", PAGE_FAULTS_MIN,
366 CONTEXT_PERF_THREAD_COUNTER, 0),
367 PERF_SW("perf:thread:context-switches", CONTEXT_SWITCHES,
368 CONTEXT_PERF_THREAD_COUNTER, 0),
369 PERF_SW("perf:thread:cs", CONTEXT_SWITCHES,
370 CONTEXT_PERF_THREAD_COUNTER, 0),
371 PERF_SW("perf:thread:cpu-migrations", CPU_MIGRATIONS,
372 CONTEXT_PERF_THREAD_COUNTER, 0),
373 PERF_SW("perf:thread:migrations", CPU_MIGRATIONS,
374 CONTEXT_PERF_THREAD_COUNTER, 0),
375 PERF_SW("perf:thread:alignment-faults", ALIGNMENT_FAULTS,
376 CONTEXT_PERF_THREAD_COUNTER, 0),
377 PERF_SW("perf:thread:emulation-faults", EMULATION_FAULTS,
378 CONTEXT_PERF_THREAD_COUNTER, 0),
379
380 /*
381 * Perf per-CPU counters, backward compatibilty for names.
382 * Hidden from help listing.
383 */
384 PERF_HW("perf:cpu-cycles", CPU_CYCLES,
385 CONTEXT_PERF_COUNTER, 1),
386 PERF_HW("perf:cycles", CPU_CYCLES,
387 CONTEXT_PERF_COUNTER, 1),
388 PERF_HW("perf:stalled-cycles-frontend", STALLED_CYCLES_FRONTEND,
389 CONTEXT_PERF_COUNTER, 1),
390 PERF_HW("perf:idle-cycles-frontend", STALLED_CYCLES_FRONTEND,
391 CONTEXT_PERF_COUNTER, 1),
392 PERF_HW("perf:stalled-cycles-backend", STALLED_CYCLES_BACKEND,
393 CONTEXT_PERF_COUNTER, 1),
394 PERF_HW("perf:idle-cycles-backend", STALLED_CYCLES_BACKEND,
395 CONTEXT_PERF_COUNTER, 1),
396 PERF_HW("perf:instructions", INSTRUCTIONS,
397 CONTEXT_PERF_COUNTER, 1),
398 PERF_HW("perf:cache-references", CACHE_REFERENCES,
399 CONTEXT_PERF_COUNTER, 1),
400 PERF_HW("perf:cache-misses", CACHE_MISSES,
401 CONTEXT_PERF_COUNTER, 1),
402 PERF_HW("perf:branch-instructions", BRANCH_INSTRUCTIONS,
403 CONTEXT_PERF_COUNTER, 1),
404 PERF_HW("perf:branches", BRANCH_INSTRUCTIONS,
405 CONTEXT_PERF_COUNTER, 1),
406 PERF_HW("perf:branch-misses", BRANCH_MISSES,
407 CONTEXT_PERF_COUNTER, 1),
408 PERF_HW("perf:bus-cycles", BUS_CYCLES,
409 CONTEXT_PERF_COUNTER, 1),
410
411 PERF_HW_CACHE("perf:L1-dcache", L1D,
412 CONTEXT_PERF_COUNTER, 1),
413 PERF_HW_CACHE("perf:L1-icache", L1I,
414 CONTEXT_PERF_COUNTER, 1),
415 PERF_HW_CACHE("perf:LLC", LL,
416 CONTEXT_PERF_COUNTER, 1),
417 PERF_HW_CACHE("perf:dTLB", DTLB,
418 CONTEXT_PERF_COUNTER, 1),
419 _PERF_HW_CACHE("perf:iTLB-loads", ITLB,
420 CONTEXT_PERF_COUNTER, READ, ACCESS, 1),
421 _PERF_HW_CACHE("perf:iTLB-load-misses", ITLB,
422 CONTEXT_PERF_COUNTER, READ, MISS, 1),
423 _PERF_HW_CACHE("perf:branch-loads", BPU,
424 CONTEXT_PERF_COUNTER, READ, ACCESS, 1),
425 _PERF_HW_CACHE("perf:branch-load-misses", BPU,
426 CONTEXT_PERF_COUNTER, READ, MISS, 1),
427
428 PERF_SW("perf:cpu-clock", CPU_CLOCK,
429 CONTEXT_PERF_COUNTER, 1),
430 PERF_SW("perf:task-clock", TASK_CLOCK,
431 CONTEXT_PERF_COUNTER, 1),
432 PERF_SW("perf:page-fault", PAGE_FAULTS,
433 CONTEXT_PERF_COUNTER, 1),
434 PERF_SW("perf:faults", PAGE_FAULTS,
435 CONTEXT_PERF_COUNTER, 1),
436 PERF_SW("perf:major-faults", PAGE_FAULTS_MAJ,
437 CONTEXT_PERF_COUNTER, 1),
438 PERF_SW("perf:minor-faults", PAGE_FAULTS_MIN,
439 CONTEXT_PERF_COUNTER, 1),
440 PERF_SW("perf:context-switches", CONTEXT_SWITCHES,
441 CONTEXT_PERF_COUNTER, 1),
442 PERF_SW("perf:cs", CONTEXT_SWITCHES,
443 CONTEXT_PERF_COUNTER, 1),
444 PERF_SW("perf:cpu-migrations", CPU_MIGRATIONS,
445 CONTEXT_PERF_COUNTER, 1),
446 PERF_SW("perf:migrations", CPU_MIGRATIONS,
447 CONTEXT_PERF_COUNTER, 1),
448 PERF_SW("perf:alignment-faults", ALIGNMENT_FAULTS,
449 CONTEXT_PERF_COUNTER, 1),
450 PERF_SW("perf:emulation-faults", EMULATION_FAULTS,
451 CONTEXT_PERF_COUNTER, 1),
452
453 { NULL, -1 }, /* Closure */
454 };
455
456 #undef PERF_HW_CACHE
457 #undef _PERF_HW_CACHE
458 #undef PERF_SW
459 #undef PERF_HW
460
461 /*
462 * Context type for command line option parsing.
463 */
464 struct ctx_type {
465 struct ctx_opts *opt;
466 struct cds_list_head list;
467 };
468
469 /*
470 * List of context type. Use to enable multiple context on a single command
471 * line entry.
472 */
473 struct ctx_type_list {
474 struct cds_list_head head;
475 } ctx_type_list = {
476 .head = CDS_LIST_HEAD_INIT(ctx_type_list.head),
477 };
478
479 /*
480 * Pretty print context type.
481 */
482 static void print_ctx_type(FILE *ofp)
483 {
484 int i = 0;
485
486 while (ctx_opts[i].symbol != NULL) {
487 if (!ctx_opts[i].hide_help) {
488 fprintf(ofp, "%s\n", ctx_opts[i].symbol);
489 }
490 i++;
491 }
492 }
493
494 /*
495 * Find context numerical value from string.
496 *
497 * Return -1 if not found.
498 */
499 static int find_ctx_type_idx(const char *opt)
500 {
501 int ret, i = 0;
502
503 while (ctx_opts[i].symbol != NULL) {
504 if (strcmp(opt, ctx_opts[i].symbol) == 0) {
505 ret = i;
506 goto end;
507 }
508 i++;
509 }
510
511 ret = -1;
512 end:
513 return ret;
514 }
515
516 static
517 enum lttng_domain_type get_domain(void)
518 {
519 if (opt_kernel) {
520 return LTTNG_DOMAIN_KERNEL;
521 } else if (opt_userspace) {
522 return LTTNG_DOMAIN_UST;
523 } else if (opt_jul) {
524 return LTTNG_DOMAIN_JUL;
525 } else if (opt_log4j) {
526 return LTTNG_DOMAIN_LOG4J;
527 } else {
528 assert(0);
529 }
530 }
531
532 /*
533 * Add context to channel or event.
534 */
535 static int add_context(char *session_name)
536 {
537 int ret = CMD_SUCCESS, warn = 0, success = 0;
538 struct lttng_event_context context;
539 struct lttng_domain dom;
540 struct ctx_type *type;
541 char *ptr;
542
543 memset(&context, 0, sizeof(context));
544 memset(&dom, 0, sizeof(dom));
545
546 dom.type = get_domain();
547 handle = lttng_create_handle(session_name, &dom);
548 if (handle == NULL) {
549 ret = CMD_ERROR;
550 goto error;
551 }
552
553 if (lttng_opt_mi) {
554 /* Open a contexts element */
555 ret = mi_lttng_writer_open_element(writer, config_element_contexts);
556 if (ret) {
557 goto error;
558 }
559 }
560
561 /* Iterate over all the context types given */
562 cds_list_for_each_entry(type, &ctx_type_list.head, list) {
563 context.ctx = (enum lttng_event_context_type) type->opt->ctx_type;
564 switch (context.ctx) {
565 case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
566 case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
567 case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
568 context.u.perf_counter.type = type->opt->u.perf.type;
569 context.u.perf_counter.config = type->opt->u.perf.config;
570 strncpy(context.u.perf_counter.name, type->opt->symbol,
571 LTTNG_SYMBOL_NAME_LEN);
572 context.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
573 /* Replace : and - by _ */
574 while ((ptr = strchr(context.u.perf_counter.name, '-')) != NULL) {
575 *ptr = '_';
576 }
577 while ((ptr = strchr(context.u.perf_counter.name, ':')) != NULL) {
578 *ptr = '_';
579 }
580 break;
581 case LTTNG_EVENT_CONTEXT_APP_CONTEXT:
582 context.u.app_ctx.provider_name =
583 type->opt->u.app_ctx.provider_name;
584 context.u.app_ctx.ctx_name =
585 type->opt->u.app_ctx.ctx_name;
586 break;
587 default:
588 break;
589 }
590 DBG("Adding context...");
591
592 if (lttng_opt_mi) {
593 /* We leave context open the update the success of the command */
594 ret = mi_lttng_context(writer, &context, 1);
595 if (ret) {
596 ret = CMD_ERROR;
597 goto error;
598 }
599 }
600
601 ret = lttng_add_context(handle, &context, NULL, opt_channel_name);
602 if (ret < 0) {
603 ERR("%s: %s", type->opt->symbol, lttng_strerror(ret));
604 warn = 1;
605 success = 0;
606 } else {
607 if (opt_channel_name) {
608 MSG("%s context %s added to channel %s",
609 get_domain_str(dom.type), type->opt->symbol,
610 opt_channel_name);
611 } else {
612 MSG("%s context %s added to all channels",
613 get_domain_str(dom.type), type->opt->symbol);
614 }
615 success = 1;
616 }
617
618 if (lttng_opt_mi) {
619 /* Is the single operation a success ? */
620 ret = mi_lttng_writer_write_element_bool(writer,
621 mi_lttng_element_success, success);
622 if (ret) {
623 ret = CMD_ERROR;
624 goto error;
625 }
626
627 /* Close the context element */
628 ret = mi_lttng_writer_close_element(writer);
629 if (ret) {
630 ret = CMD_ERROR;
631 goto error;
632 }
633 }
634 }
635
636 if (lttng_opt_mi) {
637 /* Close contexts element */
638 ret = mi_lttng_writer_close_element(writer);
639 if (ret) {
640 goto error;
641 }
642 }
643
644 ret = CMD_SUCCESS;
645
646 error:
647 lttng_destroy_handle(handle);
648
649 /*
650 * This means that at least one add_context failed and tells the user to
651 * look on stderr for error(s).
652 */
653 if (!ret && warn) {
654 ret = CMD_WARNING;
655 }
656 return ret;
657 }
658
659 static
660 void destroy_ctx_type(struct ctx_type *type)
661 {
662 if (!type) {
663 return;
664 }
665 if (type->opt) {
666 free(type->opt->symbol);
667 }
668 free(type->opt);
669 free(type);
670 }
671
672 static
673 struct ctx_type *create_ctx_type(void)
674 {
675 struct ctx_type *type = zmalloc(sizeof(*type));
676
677 if (!type) {
678 PERROR("malloc ctx_type");
679 goto end;
680 }
681
682 type->opt = zmalloc(sizeof(*type->opt));
683 if (!type->opt) {
684 PERROR("malloc ctx_type options");
685 destroy_ctx_type(type);
686 type = NULL;
687 goto end;
688 }
689 end:
690 return type;
691 }
692
693 static
694 int find_ctx_type_perf_raw(const char *ctx, struct ctx_type *type)
695 {
696 int ret;
697 int field_pos = 0;
698 char *tmp_list, *cur_list;
699
700 cur_list = tmp_list = strdup(ctx);
701 if (!tmp_list) {
702 PERROR("strdup temp list");
703 ret = -ENOMEM;
704 goto end;
705 }
706
707 /* Looking for "perf:[cpu|thread]:raw:<mask>:<name>". */
708 for (;;) {
709 char *next;
710
711 next = strtok(cur_list, ":");
712 if (!next) {
713 break;
714 }
715 cur_list = NULL;
716 switch (field_pos) {
717 case 0:
718 if (strncmp(next, "perf", 4) != 0) {
719 ret = -1;
720 goto end;
721 }
722 break;
723 case 1:
724 if (strncmp(next, "cpu", 3) == 0) {
725 type->opt->ctx_type = CONTEXT_PERF_CPU_COUNTER;
726 } else if (strncmp(next, "thread", 4) == 0) {
727 type->opt->ctx_type = CONTEXT_PERF_THREAD_COUNTER;
728 } else {
729 ret = -1;
730 goto end;
731 }
732 break;
733 case 2:
734 if (strncmp(next, "raw", 3) != 0) {
735 ret = -1;
736 goto end;
737 }
738 break;
739 case 3:
740 {
741 char *endptr;
742
743 if (strlen(next) < 2 || next[0] != 'r') {
744 ERR("Wrong perf raw mask format: expected rNNN");
745 ret = -1;
746 goto end;
747 }
748 errno = 0;
749 type->opt->u.perf.config = strtoll(next + 1, &endptr, 16);
750 if (errno != 0 || !endptr || *endptr) {
751 ERR("Wrong perf raw mask format: expected rNNN");
752 ret = -1;
753 goto end;
754 }
755 break;
756 }
757 case 4:
758 /* name */
759 break;
760 case 5:
761 ERR("Too many ':' in perf raw format");
762 ret = -1;
763 goto end;
764 };
765 field_pos++;
766 }
767
768 if (field_pos < 5) {
769 ERR("Invalid perf counter specifier, expected a specifier of "
770 "the form perf:cpu:raw:rNNN:<name> or "
771 "perf:thread:raw:rNNN:<name>");
772 ret = -1;
773 goto end;
774 }
775
776 ret = 0;
777 goto end;
778
779 end:
780 free(tmp_list);
781 return ret;
782 }
783
784 static
785 struct ctx_type *get_context_type(const char *ctx)
786 {
787 int opt_index, ret;
788 struct ctx_type *type = NULL;
789 const char app_ctx_prefix[] = "$app.";
790 char *provider_name = NULL, *ctx_name = NULL;
791 size_t i, len, colon_pos = 0, provider_name_len, ctx_name_len;
792
793 if (!ctx) {
794 goto not_found;
795 }
796
797 type = create_ctx_type();
798 if (!type) {
799 goto not_found;
800 }
801
802 /* Check if ctx matches a known static context. */
803 opt_index = find_ctx_type_idx(ctx);
804 if (opt_index >= 0) {
805 *type->opt = ctx_opts[opt_index];
806 type->opt->symbol = strdup(ctx_opts[opt_index].symbol);
807 goto found;
808 }
809
810 /* Check if ctx is a raw perf context. */
811 ret = find_ctx_type_perf_raw(ctx, type);
812 if (ret == 0) {
813 type->opt->u.perf.type = PERF_TYPE_RAW;
814 type->opt->symbol = strdup(ctx);
815 if (!type->opt->symbol) {
816 PERROR("Copy perf field name");
817 goto not_found;
818 }
819 goto found;
820 }
821
822 /*
823 * No match found against static contexts; check if it is an app
824 * context.
825 */
826 len = strlen(ctx);
827 if (len <= sizeof(app_ctx_prefix) - 1) {
828 goto not_found;
829 }
830
831 /* String starts with $app. */
832 if (strncmp(ctx, app_ctx_prefix, sizeof(app_ctx_prefix) - 1)) {
833 goto not_found;
834 }
835
836 /* Validate that the ':' separator is present. */
837 for (i = sizeof(app_ctx_prefix); i < len; i++) {
838 const char c = ctx[i];
839
840 if (c == ':') {
841 colon_pos = i;
842 break;
843 }
844 }
845
846 /*
847 * No colon found or no ctx name ("$app.provider:") or no provider name
848 * given ("$app.:..."), which is invalid.
849 */
850 if (!colon_pos || colon_pos == len ||
851 colon_pos == sizeof(app_ctx_prefix)) {
852 ERR("Invalid application context provided: no provider or context name provided.");
853 goto not_found;
854 }
855
856 provider_name_len = colon_pos - sizeof(app_ctx_prefix) + 2;
857 provider_name = zmalloc(provider_name_len);
858 if (!provider_name) {
859 PERROR("malloc provider_name");
860 goto not_found;
861 }
862 strncpy(provider_name, ctx + sizeof(app_ctx_prefix) - 1,
863 provider_name_len - 1);
864 type->opt->u.app_ctx.provider_name = provider_name;
865
866 ctx_name_len = len - colon_pos;
867 ctx_name = zmalloc(ctx_name_len);
868 if (!ctx_name) {
869 PERROR("malloc ctx_name");
870 goto not_found;
871 }
872 strncpy(ctx_name, ctx + colon_pos + 1, ctx_name_len - 1);
873 type->opt->u.app_ctx.ctx_name = ctx_name;
874 type->opt->ctx_type = CONTEXT_APP_CONTEXT;
875 type->opt->symbol = strdup(ctx);
876 found:
877 return type;
878 not_found:
879 free(provider_name);
880 free(ctx_name);
881 destroy_ctx_type(type);
882 return NULL;
883 }
884
885 /*
886 * Add context to channel or event.
887 */
888 int cmd_add_context(int argc, const char **argv)
889 {
890 int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
891 int success = 1;
892 static poptContext pc;
893 struct ctx_type *type, *tmptype;
894 char *session_name = NULL;
895
896 if (argc < 2) {
897 ret = CMD_ERROR;
898 goto end;
899 }
900
901 pc = poptGetContext(NULL, argc, argv, long_options, 0);
902 poptReadDefaultConfig(pc, 0);
903
904 while ((opt = poptGetNextOpt(pc)) != -1) {
905 switch (opt) {
906 case OPT_HELP:
907 SHOW_HELP();
908 goto end;
909 case OPT_LIST:
910 print_ctx_type(stdout);
911 goto end;
912 case OPT_TYPE:
913 {
914 type = get_context_type(opt_type);
915 if (!type) {
916 ERR("Unknown context type %s", opt_type);
917 ret = CMD_FATAL;
918 goto end;
919 }
920 cds_list_add_tail(&type->list, &ctx_type_list.head);
921 break;
922 }
923 case OPT_USERSPACE:
924 opt_userspace = 1;
925 break;
926 case OPT_JUL:
927 opt_jul = 1;
928 break;
929 case OPT_LOG4J:
930 opt_log4j = 1;
931 break;
932 case OPT_LIST_OPTIONS:
933 list_cmd_options(stdout, long_options);
934 goto end;
935 default:
936 ret = CMD_UNDEFINED;
937 goto end;
938 }
939 }
940
941 ret = print_missing_or_multiple_domains(opt_kernel + opt_userspace +
942 opt_jul + opt_log4j);
943 if (ret) {
944 ret = CMD_ERROR;
945 goto end;
946 }
947
948 if (!opt_type) {
949 ERR("Missing mandatory -t TYPE");
950 ret = CMD_ERROR;
951 goto end;
952 }
953
954 if (!opt_session_name) {
955 session_name = get_session_name();
956 if (session_name == NULL) {
957 ret = CMD_ERROR;
958 goto end;
959 }
960 } else {
961 session_name = opt_session_name;
962 }
963
964 /* Mi check */
965 if (lttng_opt_mi) {
966 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
967 if (!writer) {
968 ret = -LTTNG_ERR_NOMEM;
969 goto end;
970 }
971
972 /* Open command element */
973 ret = mi_lttng_writer_command_open(writer,
974 mi_lttng_element_command_add_context);
975 if (ret) {
976 ret = CMD_ERROR;
977 goto end;
978 }
979
980 /* Open output element */
981 ret = mi_lttng_writer_open_element(writer,
982 mi_lttng_element_command_output);
983 if (ret) {
984 ret = CMD_ERROR;
985 goto end;
986 }
987 }
988
989 command_ret = add_context(session_name);
990 if (command_ret) {
991 success = 0;
992 }
993
994 /* Mi closing */
995 if (lttng_opt_mi) {
996 /* Close output element */
997 ret = mi_lttng_writer_close_element(writer);
998 if (ret) {
999 ret = CMD_ERROR;
1000 goto end;
1001 }
1002
1003 /* Success ? */
1004 ret = mi_lttng_writer_write_element_bool(writer,
1005 mi_lttng_element_command_success, success);
1006 if (ret) {
1007 ret = CMD_ERROR;
1008 goto end;
1009 }
1010
1011 /* Command element close */
1012 ret = mi_lttng_writer_command_close(writer);
1013 if (ret) {
1014 ret = CMD_ERROR;
1015 goto end;
1016 }
1017 }
1018
1019 end:
1020 if (!opt_session_name) {
1021 free(session_name);
1022 }
1023
1024 /* Mi clean-up */
1025 if (writer && mi_lttng_writer_destroy(writer)) {
1026 /* Preserve original error code */
1027 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
1028 }
1029
1030 /* Cleanup allocated memory */
1031 cds_list_for_each_entry_safe(type, tmptype, &ctx_type_list.head, list) {
1032 destroy_ctx_type(type);
1033 }
1034
1035 /* Overwrite ret if an error occurred during add_context() */
1036 ret = command_ret ? command_ret : ret;
1037
1038 poptFreeContext(pc);
1039 return ret;
1040 }
LTTng tools - Deliverables
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