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Cleanup: always use sysconf to get the page size
[lttng-tools.git] / src / bin / lttng / commands / add_context.c
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1/*
2 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
3 * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0-only
6 *
7 */
8
9#define _LGPL_SOURCE
10#include <ctype.h>
11#include <popt.h>
12#include <stdio.h>
13#include <stdlib.h>
14#include <string.h>
15#include <sys/stat.h>
16#include <sys/types.h>
17#include <unistd.h>
18
19#include <urcu/list.h>
20
21#include <lttng/domain-internal.h>
22#include <common/mi-lttng.h>
23
24#include "../command.h"
25
26static char *opt_channel_name;
27static char *opt_session_name;
28static int opt_kernel;
29static int opt_userspace;
30static int opt_jul;
31static int opt_log4j;
32static char *opt_type;
33
34#ifdef LTTNG_EMBED_HELP
35static const char help_msg[] =
36#include <lttng-add-context.1.h>
37;
38#endif
39
40enum {
41 OPT_HELP = 1,
42 OPT_TYPE,
43 OPT_USERSPACE,
44 OPT_JUL,
45 OPT_LOG4J,
46 OPT_LIST_OPTIONS,
47 OPT_LIST,
48};
49
50static struct lttng_handle *handle;
51static struct mi_writer *writer;
52
53/*
54 * Taken from the LTTng ABI
55 */
56enum context_type {
57 CONTEXT_PID = 0,
58 CONTEXT_PERF_COUNTER = 1, /* Backward compat. */
59 CONTEXT_PROCNAME = 2,
60 CONTEXT_PRIO = 3,
61 CONTEXT_NICE = 4,
62 CONTEXT_VPID = 5,
63 CONTEXT_TID = 6,
64 CONTEXT_VTID = 7,
65 CONTEXT_PPID = 8,
66 CONTEXT_VPPID = 9,
67 CONTEXT_PTHREAD_ID = 10,
68 CONTEXT_HOSTNAME = 11,
69 CONTEXT_IP = 12,
70 CONTEXT_PERF_CPU_COUNTER = 13,
71 CONTEXT_PERF_THREAD_COUNTER = 14,
72 CONTEXT_APP_CONTEXT = 15,
73 CONTEXT_INTERRUPTIBLE = 16,
74 CONTEXT_PREEMPTIBLE = 17,
75 CONTEXT_NEED_RESCHEDULE = 18,
76 CONTEXT_MIGRATABLE = 19,
77 CONTEXT_CALLSTACK_KERNEL = 20,
78 CONTEXT_CALLSTACK_USER = 21,
79 CONTEXT_CGROUP_NS = 22,
80 CONTEXT_IPC_NS = 23,
81 CONTEXT_MNT_NS = 24,
82 CONTEXT_NET_NS = 25,
83 CONTEXT_PID_NS = 26,
84 CONTEXT_USER_NS = 27,
85 CONTEXT_UTS_NS = 28,
86 CONTEXT_UID = 29,
87 CONTEXT_EUID = 30,
88 CONTEXT_SUID = 31,
89 CONTEXT_GID = 32,
90 CONTEXT_EGID = 33,
91 CONTEXT_SGID = 34,
92 CONTEXT_VUID = 35,
93 CONTEXT_VEUID = 36,
94 CONTEXT_VSUID = 37,
95 CONTEXT_VGID = 38,
96 CONTEXT_VEGID = 39,
97 CONTEXT_VSGID = 40,
98 CONTEXT_TIME_NS = 41,
99};
100
101/*
102 * Taken from the Perf ABI (all enum perf_*)
103 */
104enum perf_type {
105 PERF_TYPE_HARDWARE = 0,
106 PERF_TYPE_SOFTWARE = 1,
107 PERF_TYPE_HW_CACHE = 3,
108 PERF_TYPE_RAW = 4,
109};
110
111enum perf_count_hard {
112 PERF_COUNT_HW_CPU_CYCLES = 0,
113 PERF_COUNT_HW_INSTRUCTIONS = 1,
114 PERF_COUNT_HW_CACHE_REFERENCES = 2,
115 PERF_COUNT_HW_CACHE_MISSES = 3,
116 PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4,
117 PERF_COUNT_HW_BRANCH_MISSES = 5,
118 PERF_COUNT_HW_BUS_CYCLES = 6,
119 PERF_COUNT_HW_STALLED_CYCLES_FRONTEND = 7,
120 PERF_COUNT_HW_STALLED_CYCLES_BACKEND = 8,
121};
122
123enum perf_count_soft {
124 PERF_COUNT_SW_CPU_CLOCK = 0,
125 PERF_COUNT_SW_TASK_CLOCK = 1,
126 PERF_COUNT_SW_PAGE_FAULTS = 2,
127 PERF_COUNT_SW_CONTEXT_SWITCHES = 3,
128 PERF_COUNT_SW_CPU_MIGRATIONS = 4,
129 PERF_COUNT_SW_PAGE_FAULTS_MIN = 5,
130 PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6,
131 PERF_COUNT_SW_ALIGNMENT_FAULTS = 7,
132 PERF_COUNT_SW_EMULATION_FAULTS = 8,
133};
134
135/*
136 * Generalized hardware cache events:
137 *
138 * { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x
139 * { read, write, prefetch } x
140 * { accesses, misses }
141 */
142enum perf_hw_cache_id {
143 PERF_COUNT_HW_CACHE_L1D = 0,
144 PERF_COUNT_HW_CACHE_L1I = 1,
145 PERF_COUNT_HW_CACHE_LL = 2,
146 PERF_COUNT_HW_CACHE_DTLB = 3,
147 PERF_COUNT_HW_CACHE_ITLB = 4,
148 PERF_COUNT_HW_CACHE_BPU = 5,
149
150 PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
151};
152
153enum perf_hw_cache_op_id {
154 PERF_COUNT_HW_CACHE_OP_READ = 0,
155 PERF_COUNT_HW_CACHE_OP_WRITE = 1,
156 PERF_COUNT_HW_CACHE_OP_PREFETCH = 2,
157
158 PERF_COUNT_HW_CACHE_OP_MAX, /* non-ABI */
159};
160
161enum perf_hw_cache_op_result_id {
162 PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0,
163 PERF_COUNT_HW_CACHE_RESULT_MISS = 1,
164
165 PERF_COUNT_HW_CACHE_RESULT_MAX, /* non-ABI */
166};
167
168static struct poptOption long_options[] = {
169 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
170 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
171 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
172 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
173 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
174 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
175 {"jul", 'j', POPT_ARG_NONE, 0, OPT_JUL, 0, 0},
176 {"log4j", 'l', POPT_ARG_NONE, 0, OPT_LOG4J, 0, 0},
177 {"type", 't', POPT_ARG_STRING, &opt_type, OPT_TYPE, 0, 0},
178 {"list", 0, POPT_ARG_NONE, NULL, OPT_LIST, NULL, NULL},
179 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
180 {0, 0, 0, 0, 0, 0, 0}
181};
182
183/*
184 * Context options
185 */
186#define PERF_HW(optstr, name, type, hide) \
187 { \
188 (char *) optstr, type, hide, \
189 .u.perf = { PERF_TYPE_HARDWARE, PERF_COUNT_HW_##name, },\
190 }
191
192#define PERF_SW(optstr, name, type, hide) \
193 { \
194 (char *) optstr, type, hide, \
195 .u.perf = { PERF_TYPE_SOFTWARE, PERF_COUNT_SW_##name, },\
196 }
197
198#define _PERF_HW_CACHE(optstr, name, type, op, result, hide) \
199 { \
200 (char *) optstr, type, hide, \
201 .u.perf = { \
202 PERF_TYPE_HW_CACHE, \
203 (uint64_t) PERF_COUNT_HW_CACHE_##name \
204 | ((uint64_t) PERF_COUNT_HW_CACHE_OP_##op << 8) \
205 | ((uint64_t) PERF_COUNT_HW_CACHE_RESULT_##result << 16), \
206 }, \
207 }
208
209#define PERF_HW_CACHE(optstr, name, type, hide) \
210 _PERF_HW_CACHE(optstr "-loads", name, type, \
211 READ, ACCESS, hide), \
212 _PERF_HW_CACHE(optstr "-load-misses", name, type, \
213 READ, MISS, hide), \
214 _PERF_HW_CACHE(optstr "-stores", name, type, \
215 WRITE, ACCESS, hide), \
216 _PERF_HW_CACHE(optstr "-store-misses", name, type, \
217 WRITE, MISS, hide), \
218 _PERF_HW_CACHE(optstr "-prefetches", name, type, \
219 PREFETCH, ACCESS, hide), \
220 _PERF_HW_CACHE(optstr "-prefetch-misses", name, type, \
221 PREFETCH, MISS, hide)
222
223static
224const struct ctx_opts {
225 char *symbol;
226 enum context_type ctx_type;
227 int hide_help; /* Hide from --help */
228 union {
229 struct {
230 uint32_t type;
231 uint64_t config;
232 } perf;
233 struct {
234 char *provider_name;
235 char *ctx_name;
236 } app_ctx;
237 } u;
238} ctx_opts[] = {
239 /*
240 * These (char *) casts (as well as those in the PERF_* macros) are
241 * safe because we never free these instances of `struct ctx_opts`.
242 */
243 { (char *) "pid", CONTEXT_PID },
244 { (char *) "procname", CONTEXT_PROCNAME },
245 { (char *) "prio", CONTEXT_PRIO },
246 { (char *) "nice", CONTEXT_NICE },
247 { (char *) "vpid", CONTEXT_VPID },
248 { (char *) "tid", CONTEXT_TID },
249 { (char *) "pthread_id", CONTEXT_PTHREAD_ID },
250 { (char *) "vtid", CONTEXT_VTID },
251 { (char *) "ppid", CONTEXT_PPID },
252 { (char *) "vppid", CONTEXT_VPPID },
253 { (char *) "hostname", CONTEXT_HOSTNAME },
254 { (char *) "ip", CONTEXT_IP },
255 { (char *) "interruptible", CONTEXT_INTERRUPTIBLE },
256 { (char *) "preemptible", CONTEXT_PREEMPTIBLE },
257 { (char *) "need_reschedule", CONTEXT_NEED_RESCHEDULE },
258 { (char *) "migratable", CONTEXT_MIGRATABLE },
259 { (char *) "callstack-kernel", CONTEXT_CALLSTACK_KERNEL },
260#if HAVE_MODULES_USERSPACE_CALLSTACK_CONTEXT
261 { (char *) "callstack-user", CONTEXT_CALLSTACK_USER },
262#endif
263 { (char *) "cgroup_ns", CONTEXT_CGROUP_NS },
264 { (char *) "ipc_ns", CONTEXT_IPC_NS },
265 { (char *) "mnt_ns", CONTEXT_MNT_NS },
266 { (char *) "net_ns", CONTEXT_NET_NS },
267 { (char *) "pid_ns", CONTEXT_PID_NS },
268 { (char *) "time_ns", CONTEXT_TIME_NS },
269 { (char *) "user_ns", CONTEXT_USER_NS },
270 { (char *) "uts_ns", CONTEXT_UTS_NS },
271 { (char *) "uid", CONTEXT_UID },
272 { (char *) "euid", CONTEXT_EUID },
273 { (char *) "suid", CONTEXT_SUID },
274 { (char *) "gid", CONTEXT_GID },
275 { (char *) "egid", CONTEXT_EGID },
276 { (char *) "sgid", CONTEXT_SGID },
277 { (char *) "vuid", CONTEXT_VUID },
278 { (char *) "veuid", CONTEXT_VEUID },
279 { (char *) "vsuid", CONTEXT_VSUID },
280 { (char *) "vgid", CONTEXT_VGID },
281 { (char *) "vegid", CONTEXT_VEGID },
282 { (char *) "vsgid", CONTEXT_VSGID },
283
284 /* Perf options */
285
286 /* Perf per-CPU counters */
287 PERF_HW("perf:cpu:cpu-cycles", CPU_CYCLES,
288 CONTEXT_PERF_CPU_COUNTER, 0),
289 PERF_HW("perf:cpu:cycles", CPU_CYCLES,
290 CONTEXT_PERF_CPU_COUNTER, 0),
291 PERF_HW("perf:cpu:stalled-cycles-frontend", STALLED_CYCLES_FRONTEND,
292 CONTEXT_PERF_CPU_COUNTER, 0),
293 PERF_HW("perf:cpu:idle-cycles-frontend", STALLED_CYCLES_FRONTEND,
294 CONTEXT_PERF_CPU_COUNTER, 0),
295 PERF_HW("perf:cpu:stalled-cycles-backend", STALLED_CYCLES_BACKEND,
296 CONTEXT_PERF_CPU_COUNTER, 0),
297 PERF_HW("perf:cpu:idle-cycles-backend", STALLED_CYCLES_BACKEND,
298 CONTEXT_PERF_CPU_COUNTER, 0),
299 PERF_HW("perf:cpu:instructions", INSTRUCTIONS,
300 CONTEXT_PERF_CPU_COUNTER, 0),
301 PERF_HW("perf:cpu:cache-references", CACHE_REFERENCES,
302 CONTEXT_PERF_CPU_COUNTER, 0),
303 PERF_HW("perf:cpu:cache-misses", CACHE_MISSES,
304 CONTEXT_PERF_CPU_COUNTER, 0),
305 PERF_HW("perf:cpu:branch-instructions", BRANCH_INSTRUCTIONS,
306 CONTEXT_PERF_CPU_COUNTER, 0),
307 PERF_HW("perf:cpu:branches", BRANCH_INSTRUCTIONS,
308 CONTEXT_PERF_CPU_COUNTER, 0),
309 PERF_HW("perf:cpu:branch-misses", BRANCH_MISSES,
310 CONTEXT_PERF_CPU_COUNTER, 0),
311 PERF_HW("perf:cpu:bus-cycles", BUS_CYCLES,
312 CONTEXT_PERF_CPU_COUNTER, 0),
313
314 PERF_HW_CACHE("perf:cpu:L1-dcache", L1D,
315 CONTEXT_PERF_CPU_COUNTER, 0),
316 PERF_HW_CACHE("perf:cpu:L1-icache", L1I,
317 CONTEXT_PERF_CPU_COUNTER, 0),
318 PERF_HW_CACHE("perf:cpu:LLC", LL,
319 CONTEXT_PERF_CPU_COUNTER, 0),
320 PERF_HW_CACHE("perf:cpu:dTLB", DTLB,
321 CONTEXT_PERF_CPU_COUNTER, 0),
322 _PERF_HW_CACHE("perf:cpu:iTLB-loads", ITLB,
323 CONTEXT_PERF_CPU_COUNTER, READ, ACCESS, 0),
324 _PERF_HW_CACHE("perf:cpu:iTLB-load-misses", ITLB,
325 CONTEXT_PERF_CPU_COUNTER, READ, MISS, 0),
326 _PERF_HW_CACHE("perf:cpu:branch-loads", BPU,
327 CONTEXT_PERF_CPU_COUNTER, READ, ACCESS, 0),
328 _PERF_HW_CACHE("perf:cpu:branch-load-misses", BPU,
329 CONTEXT_PERF_CPU_COUNTER, READ, MISS, 0),
330
331 PERF_SW("perf:cpu:cpu-clock", CPU_CLOCK,
332 CONTEXT_PERF_CPU_COUNTER, 0),
333 PERF_SW("perf:cpu:task-clock", TASK_CLOCK,
334 CONTEXT_PERF_CPU_COUNTER, 0),
335 PERF_SW("perf:cpu:page-fault", PAGE_FAULTS,
336 CONTEXT_PERF_CPU_COUNTER, 0),
337 PERF_SW("perf:cpu:faults", PAGE_FAULTS,
338 CONTEXT_PERF_CPU_COUNTER, 0),
339 PERF_SW("perf:cpu:major-faults", PAGE_FAULTS_MAJ,
340 CONTEXT_PERF_CPU_COUNTER, 0),
341 PERF_SW("perf:cpu:minor-faults", PAGE_FAULTS_MIN,
342 CONTEXT_PERF_CPU_COUNTER, 0),
343 PERF_SW("perf:cpu:context-switches", CONTEXT_SWITCHES,
344 CONTEXT_PERF_CPU_COUNTER, 0),
345 PERF_SW("perf:cpu:cs", CONTEXT_SWITCHES,
346 CONTEXT_PERF_CPU_COUNTER, 0),
347 PERF_SW("perf:cpu:cpu-migrations", CPU_MIGRATIONS,
348 CONTEXT_PERF_CPU_COUNTER, 0),
349 PERF_SW("perf:cpu:migrations", CPU_MIGRATIONS,
350 CONTEXT_PERF_CPU_COUNTER, 0),
351 PERF_SW("perf:cpu:alignment-faults", ALIGNMENT_FAULTS,
352 CONTEXT_PERF_CPU_COUNTER, 0),
353 PERF_SW("perf:cpu:emulation-faults", EMULATION_FAULTS,
354 CONTEXT_PERF_CPU_COUNTER, 0),
355
356 /* Perf per-thread counters */
357 PERF_HW("perf:thread:cpu-cycles", CPU_CYCLES,
358 CONTEXT_PERF_THREAD_COUNTER, 0),
359 PERF_HW("perf:thread:cycles", CPU_CYCLES,
360 CONTEXT_PERF_THREAD_COUNTER, 0),
361 PERF_HW("perf:thread:stalled-cycles-frontend", STALLED_CYCLES_FRONTEND,
362 CONTEXT_PERF_THREAD_COUNTER, 0),
363 PERF_HW("perf:thread:idle-cycles-frontend", STALLED_CYCLES_FRONTEND,
364 CONTEXT_PERF_THREAD_COUNTER, 0),
365 PERF_HW("perf:thread:stalled-cycles-backend", STALLED_CYCLES_BACKEND,
366 CONTEXT_PERF_THREAD_COUNTER, 0),
367 PERF_HW("perf:thread:idle-cycles-backend", STALLED_CYCLES_BACKEND,
368 CONTEXT_PERF_THREAD_COUNTER, 0),
369 PERF_HW("perf:thread:instructions", INSTRUCTIONS,
370 CONTEXT_PERF_THREAD_COUNTER, 0),
371 PERF_HW("perf:thread:cache-references", CACHE_REFERENCES,
372 CONTEXT_PERF_THREAD_COUNTER, 0),
373 PERF_HW("perf:thread:cache-misses", CACHE_MISSES,
374 CONTEXT_PERF_THREAD_COUNTER, 0),
375 PERF_HW("perf:thread:branch-instructions", BRANCH_INSTRUCTIONS,
376 CONTEXT_PERF_THREAD_COUNTER, 0),
377 PERF_HW("perf:thread:branches", BRANCH_INSTRUCTIONS,
378 CONTEXT_PERF_THREAD_COUNTER, 0),
379 PERF_HW("perf:thread:branch-misses", BRANCH_MISSES,
380 CONTEXT_PERF_THREAD_COUNTER, 0),
381 PERF_HW("perf:thread:bus-cycles", BUS_CYCLES,
382 CONTEXT_PERF_THREAD_COUNTER, 0),
383
384 PERF_HW_CACHE("perf:thread:L1-dcache", L1D,
385 CONTEXT_PERF_THREAD_COUNTER, 0),
386 PERF_HW_CACHE("perf:thread:L1-icache", L1I,
387 CONTEXT_PERF_THREAD_COUNTER, 0),
388 PERF_HW_CACHE("perf:thread:LLC", LL,
389 CONTEXT_PERF_THREAD_COUNTER, 0),
390 PERF_HW_CACHE("perf:thread:dTLB", DTLB,
391 CONTEXT_PERF_THREAD_COUNTER, 0),
392 _PERF_HW_CACHE("perf:thread:iTLB-loads", ITLB,
393 CONTEXT_PERF_THREAD_COUNTER, READ, ACCESS, 0),
394 _PERF_HW_CACHE("perf:thread:iTLB-load-misses", ITLB,
395 CONTEXT_PERF_THREAD_COUNTER, READ, MISS, 0),
396 _PERF_HW_CACHE("perf:thread:branch-loads", BPU,
397 CONTEXT_PERF_THREAD_COUNTER, READ, ACCESS, 0),
398 _PERF_HW_CACHE("perf:thread:branch-load-misses", BPU,
399 CONTEXT_PERF_THREAD_COUNTER, READ, MISS, 0),
400
401 PERF_SW("perf:thread:cpu-clock", CPU_CLOCK,
402 CONTEXT_PERF_THREAD_COUNTER, 0),
403 PERF_SW("perf:thread:task-clock", TASK_CLOCK,
404 CONTEXT_PERF_THREAD_COUNTER, 0),
405 PERF_SW("perf:thread:page-fault", PAGE_FAULTS,
406 CONTEXT_PERF_THREAD_COUNTER, 0),
407 PERF_SW("perf:thread:faults", PAGE_FAULTS,
408 CONTEXT_PERF_THREAD_COUNTER, 0),
409 PERF_SW("perf:thread:major-faults", PAGE_FAULTS_MAJ,
410 CONTEXT_PERF_THREAD_COUNTER, 0),
411 PERF_SW("perf:thread:minor-faults", PAGE_FAULTS_MIN,
412 CONTEXT_PERF_THREAD_COUNTER, 0),
413 PERF_SW("perf:thread:context-switches", CONTEXT_SWITCHES,
414 CONTEXT_PERF_THREAD_COUNTER, 0),
415 PERF_SW("perf:thread:cs", CONTEXT_SWITCHES,
416 CONTEXT_PERF_THREAD_COUNTER, 0),
417 PERF_SW("perf:thread:cpu-migrations", CPU_MIGRATIONS,
418 CONTEXT_PERF_THREAD_COUNTER, 0),
419 PERF_SW("perf:thread:migrations", CPU_MIGRATIONS,
420 CONTEXT_PERF_THREAD_COUNTER, 0),
421 PERF_SW("perf:thread:alignment-faults", ALIGNMENT_FAULTS,
422 CONTEXT_PERF_THREAD_COUNTER, 0),
423 PERF_SW("perf:thread:emulation-faults", EMULATION_FAULTS,
424 CONTEXT_PERF_THREAD_COUNTER, 0),
425
426 /*
427 * Perf per-CPU counters, backward compatibilty for names.
428 * Hidden from help listing.
429 */
430 PERF_HW("perf:cpu-cycles", CPU_CYCLES,
431 CONTEXT_PERF_COUNTER, 1),
432 PERF_HW("perf:cycles", CPU_CYCLES,
433 CONTEXT_PERF_COUNTER, 1),
434 PERF_HW("perf:stalled-cycles-frontend", STALLED_CYCLES_FRONTEND,
435 CONTEXT_PERF_COUNTER, 1),
436 PERF_HW("perf:idle-cycles-frontend", STALLED_CYCLES_FRONTEND,
437 CONTEXT_PERF_COUNTER, 1),
438 PERF_HW("perf:stalled-cycles-backend", STALLED_CYCLES_BACKEND,
439 CONTEXT_PERF_COUNTER, 1),
440 PERF_HW("perf:idle-cycles-backend", STALLED_CYCLES_BACKEND,
441 CONTEXT_PERF_COUNTER, 1),
442 PERF_HW("perf:instructions", INSTRUCTIONS,
443 CONTEXT_PERF_COUNTER, 1),
444 PERF_HW("perf:cache-references", CACHE_REFERENCES,
445 CONTEXT_PERF_COUNTER, 1),
446 PERF_HW("perf:cache-misses", CACHE_MISSES,
447 CONTEXT_PERF_COUNTER, 1),
448 PERF_HW("perf:branch-instructions", BRANCH_INSTRUCTIONS,
449 CONTEXT_PERF_COUNTER, 1),
450 PERF_HW("perf:branches", BRANCH_INSTRUCTIONS,
451 CONTEXT_PERF_COUNTER, 1),
452 PERF_HW("perf:branch-misses", BRANCH_MISSES,
453 CONTEXT_PERF_COUNTER, 1),
454 PERF_HW("perf:bus-cycles", BUS_CYCLES,
455 CONTEXT_PERF_COUNTER, 1),
456
457 PERF_HW_CACHE("perf:L1-dcache", L1D,
458 CONTEXT_PERF_COUNTER, 1),
459 PERF_HW_CACHE("perf:L1-icache", L1I,
460 CONTEXT_PERF_COUNTER, 1),
461 PERF_HW_CACHE("perf:LLC", LL,
462 CONTEXT_PERF_COUNTER, 1),
463 PERF_HW_CACHE("perf:dTLB", DTLB,
464 CONTEXT_PERF_COUNTER, 1),
465 _PERF_HW_CACHE("perf:iTLB-loads", ITLB,
466 CONTEXT_PERF_COUNTER, READ, ACCESS, 1),
467 _PERF_HW_CACHE("perf:iTLB-load-misses", ITLB,
468 CONTEXT_PERF_COUNTER, READ, MISS, 1),
469 _PERF_HW_CACHE("perf:branch-loads", BPU,
470 CONTEXT_PERF_COUNTER, READ, ACCESS, 1),
471 _PERF_HW_CACHE("perf:branch-load-misses", BPU,
472 CONTEXT_PERF_COUNTER, READ, MISS, 1),
473
474 PERF_SW("perf:cpu-clock", CPU_CLOCK,
475 CONTEXT_PERF_COUNTER, 1),
476 PERF_SW("perf:task-clock", TASK_CLOCK,
477 CONTEXT_PERF_COUNTER, 1),
478 PERF_SW("perf:page-fault", PAGE_FAULTS,
479 CONTEXT_PERF_COUNTER, 1),
480 PERF_SW("perf:faults", PAGE_FAULTS,
481 CONTEXT_PERF_COUNTER, 1),
482 PERF_SW("perf:major-faults", PAGE_FAULTS_MAJ,
483 CONTEXT_PERF_COUNTER, 1),
484 PERF_SW("perf:minor-faults", PAGE_FAULTS_MIN,
485 CONTEXT_PERF_COUNTER, 1),
486 PERF_SW("perf:context-switches", CONTEXT_SWITCHES,
487 CONTEXT_PERF_COUNTER, 1),
488 PERF_SW("perf:cs", CONTEXT_SWITCHES,
489 CONTEXT_PERF_COUNTER, 1),
490 PERF_SW("perf:cpu-migrations", CPU_MIGRATIONS,
491 CONTEXT_PERF_COUNTER, 1),
492 PERF_SW("perf:migrations", CPU_MIGRATIONS,
493 CONTEXT_PERF_COUNTER, 1),
494 PERF_SW("perf:alignment-faults", ALIGNMENT_FAULTS,
495 CONTEXT_PERF_COUNTER, 1),
496 PERF_SW("perf:emulation-faults", EMULATION_FAULTS,
497 CONTEXT_PERF_COUNTER, 1),
498
499 { NULL, -1 }, /* Closure */
500};
501
502#undef PERF_HW_CACHE
503#undef _PERF_HW_CACHE
504#undef PERF_SW
505#undef PERF_HW
506
507/*
508 * Context type for command line option parsing.
509 */
510struct ctx_type {
511 struct ctx_opts *opt;
512 struct cds_list_head list;
513};
514
515/*
516 * List of context type. Use to enable multiple context on a single command
517 * line entry.
518 */
519struct ctx_type_list {
520 struct cds_list_head head;
521} ctx_type_list = {
522 .head = CDS_LIST_HEAD_INIT(ctx_type_list.head),
523};
524
525
526
527/*
528 * Find context numerical value from string.
529 *
530 * Return -1 if not found.
531 */
532static int find_ctx_type_idx(const char *opt)
533{
534 int ret, i = 0;
535
536 while (ctx_opts[i].symbol != NULL) {
537 if (strcmp(opt, ctx_opts[i].symbol) == 0) {
538 ret = i;
539 goto end;
540 }
541 i++;
542 }
543
544 ret = -1;
545end:
546 return ret;
547}
548
549static
550enum lttng_domain_type get_domain(void)
551{
552 if (opt_kernel) {
553 return LTTNG_DOMAIN_KERNEL;
554 } else if (opt_userspace) {
555 return LTTNG_DOMAIN_UST;
556 } else if (opt_jul) {
557 return LTTNG_DOMAIN_JUL;
558 } else if (opt_log4j) {
559 return LTTNG_DOMAIN_LOG4J;
560 } else {
561 abort();
562 }
563}
564
565static
566int mi_open(void)
567{
568 int ret;
569
570 /* MI check */
571 if (!lttng_opt_mi) {
572 ret = 0;
573 goto end;
574 }
575
576 ret = fileno(stdout);
577 if (ret < 0) {
578 PERROR("Unable to retrieve fileno of stdout");
579 ret = CMD_ERROR;
580 goto end;
581 }
582
583 writer = mi_lttng_writer_create(ret, lttng_opt_mi);
584 if (!writer) {
585 ret = CMD_ERROR;
586 goto end;
587 }
588
589 /* Open command element */
590 ret = mi_lttng_writer_command_open(writer,
591 mi_lttng_element_command_add_context);
592 if (ret) {
593 ret = CMD_ERROR;
594 goto end;
595 }
596
597 /* Open output element */
598 ret = mi_lttng_writer_open_element(writer,
599 mi_lttng_element_command_output);
600 if (ret) {
601 ret = CMD_ERROR;
602 goto end;
603 }
604end:
605 return ret;
606}
607
608static
609int mi_close(enum cmd_error_code success)
610{
611 int ret;
612
613 /* MI closing */
614 if (!lttng_opt_mi) {
615 ret = 0;
616 goto end;
617 }
618 /* Close output element */
619 ret = mi_lttng_writer_close_element(writer);
620 if (ret) {
621 ret = CMD_ERROR;
622 goto end;
623 }
624
625 /* Success ? */
626 ret = mi_lttng_writer_write_element_bool(writer,
627 mi_lttng_element_command_success, !success);
628 if (ret) {
629 ret = CMD_ERROR;
630 goto end;
631 }
632
633 /* Command element close */
634 ret = mi_lttng_writer_command_close(writer);
635 if (ret) {
636 ret = CMD_ERROR;
637 goto end;
638 }
639end:
640 return ret;
641}
642
643static
644void populate_context(struct lttng_event_context *context,
645 const struct ctx_opts *opt)
646{
647 char *ptr;
648
649 context->ctx = (enum lttng_event_context_type) opt->ctx_type;
650 switch (context->ctx) {
651 case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
652 case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
653 case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
654 context->u.perf_counter.type = opt->u.perf.type;
655 context->u.perf_counter.config = opt->u.perf.config;
656 strncpy(context->u.perf_counter.name, opt->symbol,
657 LTTNG_SYMBOL_NAME_LEN);
658 context->u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
659 /* Replace : and - by _ */
660 while ((ptr = strchr(context->u.perf_counter.name, '-')) != NULL) {
661 *ptr = '_';
662 }
663 while ((ptr = strchr(context->u.perf_counter.name, ':')) != NULL) {
664 *ptr = '_';
665 }
666 break;
667 case LTTNG_EVENT_CONTEXT_APP_CONTEXT:
668 context->u.app_ctx.provider_name =
669 opt->u.app_ctx.provider_name;
670 context->u.app_ctx.ctx_name =
671 opt->u.app_ctx.ctx_name;
672 break;
673 default:
674 break;
675 }
676}
677
678/*
679 * Pretty print context type.
680 */
681static
682int print_ctx_type(void)
683{
684
685 FILE *ofp = stdout;
686 int i = 0;
687 int ret;
688 struct lttng_event_context context;
689
690 memset(&context, 0, sizeof(context));
691
692 ret = mi_open();
693 if (ret) {
694 ret = CMD_ERROR;
695 goto end;
696 }
697
698 if (lttng_opt_mi) {
699 /* Open a contexts element */
700 ret = mi_lttng_writer_open_element(writer, config_element_contexts);
701 if (ret) {
702 ret = CMD_ERROR;
703 goto end;
704 }
705 }
706
707 while (ctx_opts[i].symbol != NULL) {
708 if (!ctx_opts[i].hide_help) {
709 if (lttng_opt_mi) {
710 populate_context(&context, &ctx_opts[i]);
711 ret = mi_lttng_context(writer, &context, 1);
712 if (ret) {
713 ret = CMD_ERROR;
714 goto end;
715 }
716
717 ret = mi_lttng_writer_write_element_string(
718 writer,
719 mi_lttng_element_context_symbol,
720 ctx_opts[i].symbol);
721 if (ret) {
722 ret = CMD_ERROR;
723 goto end;
724 }
725
726 ret = mi_lttng_writer_close_element(writer);
727 if (ret) {
728 ret = CMD_ERROR;
729 goto end;
730 }
731 } else {
732 fprintf(ofp, "%s\n", ctx_opts[i].symbol);
733 }
734 }
735 i++;
736 }
737
738 if (lttng_opt_mi) {
739 /* Close contexts element */
740 ret = mi_lttng_writer_close_element(writer);
741 if (ret) {
742 goto end;
743 }
744 }
745
746end:
747 ret = mi_close(ret);
748 if (ret) {
749 ret = CMD_ERROR;
750 }
751 return ret;
752}
753
754/*
755 * Add context to channel or event.
756 */
757static int add_context(char *session_name)
758{
759 int ret = CMD_SUCCESS, warn = 0, success = 0;
760 struct lttng_event_context context;
761 struct lttng_domain dom;
762 struct ctx_type *type;
763
764 memset(&context, 0, sizeof(context));
765 memset(&dom, 0, sizeof(dom));
766
767 dom.type = get_domain();
768 handle = lttng_create_handle(session_name, &dom);
769 if (handle == NULL) {
770 ret = CMD_ERROR;
771 goto error;
772 }
773
774 if (lttng_opt_mi) {
775 /* Open a contexts element */
776 ret = mi_lttng_writer_open_element(writer, config_element_contexts);
777 if (ret) {
778 goto error;
779 }
780 }
781
782 /* Iterate over all the context types given */
783 cds_list_for_each_entry(type, &ctx_type_list.head, list) {
784 DBG("Adding context...");
785
786 populate_context(&context, type->opt);
787
788 if (lttng_opt_mi) {
789 /* We leave context open the update the success of the command */
790 ret = mi_lttng_context(writer, &context, 1);
791 if (ret) {
792 ret = CMD_ERROR;
793 goto error;
794 }
795
796 ret = mi_lttng_writer_write_element_string(writer,
797 mi_lttng_element_context_symbol,
798 type->opt->symbol);
799 if (ret) {
800 ret = CMD_ERROR;
801 goto error;
802 }
803 }
804
805 ret = lttng_add_context(handle, &context, NULL, opt_channel_name);
806 if (ret < 0) {
807 ERR("%s: %s", type->opt->symbol, lttng_strerror(ret));
808 warn = 1;
809 success = 0;
810 } else {
811 if (opt_channel_name) {
812 MSG("%s context %s added to channel %s",
813 lttng_domain_type_str(dom.type),
814 type->opt->symbol,
815 opt_channel_name);
816 } else {
817 MSG("%s context %s added to all channels",
818 lttng_domain_type_str(dom.type),
819 type->opt->symbol);
820 }
821 success = 1;
822 }
823
824 if (lttng_opt_mi) {
825 /* Is the single operation a success ? */
826 ret = mi_lttng_writer_write_element_bool(writer,
827 mi_lttng_element_success, success);
828 if (ret) {
829 ret = CMD_ERROR;
830 goto error;
831 }
832
833 /* Close the context element */
834 ret = mi_lttng_writer_close_element(writer);
835 if (ret) {
836 ret = CMD_ERROR;
837 goto error;
838 }
839 }
840 }
841
842 if (lttng_opt_mi) {
843 /* Close contexts element */
844 ret = mi_lttng_writer_close_element(writer);
845 if (ret) {
846 goto error;
847 }
848 }
849
850 ret = CMD_SUCCESS;
851
852error:
853 lttng_destroy_handle(handle);
854
855 /*
856 * This means that at least one add_context failed and tells the user to
857 * look on stderr for error(s).
858 */
859 if (!ret && warn) {
860 ret = CMD_WARNING;
861 }
862 return ret;
863}
864
865static
866void destroy_ctx_type(struct ctx_type *type)
867{
868 if (!type) {
869 return;
870 }
871 if (type->opt) {
872 free(type->opt->symbol);
873 }
874 free(type->opt);
875 free(type);
876}
877
878static
879struct ctx_type *create_ctx_type(void)
880{
881 struct ctx_type *type = zmalloc(sizeof(*type));
882
883 if (!type) {
884 PERROR("malloc ctx_type");
885 goto end;
886 }
887
888 type->opt = zmalloc(sizeof(*type->opt));
889 if (!type->opt) {
890 PERROR("malloc ctx_type options");
891 destroy_ctx_type(type);
892 type = NULL;
893 goto end;
894 }
895end:
896 return type;
897}
898
899static
900int find_ctx_type_perf_raw(const char *ctx, struct ctx_type *type)
901{
902 int ret;
903 int field_pos = 0;
904 char *tmp_list, *cur_list;
905
906 cur_list = tmp_list = strdup(ctx);
907 if (!tmp_list) {
908 PERROR("strdup temp list");
909 ret = -ENOMEM;
910 goto end;
911 }
912
913 /* Looking for "perf:[cpu|thread]:raw:<mask>:<name>". */
914 for (;;) {
915 char *next;
916
917 next = strtok(cur_list, ":");
918 if (!next) {
919 break;
920 }
921 cur_list = NULL;
922 switch (field_pos) {
923 case 0:
924 if (strncmp(next, "perf", 4) != 0) {
925 ret = -1;
926 goto end;
927 }
928 break;
929 case 1:
930 if (strncmp(next, "cpu", 3) == 0) {
931 type->opt->ctx_type = CONTEXT_PERF_CPU_COUNTER;
932 } else if (strncmp(next, "thread", 4) == 0) {
933 type->opt->ctx_type = CONTEXT_PERF_THREAD_COUNTER;
934 } else {
935 ret = -1;
936 goto end;
937 }
938 break;
939 case 2:
940 if (strncmp(next, "raw", 3) != 0) {
941 ret = -1;
942 goto end;
943 }
944 break;
945 case 3:
946 {
947 char *endptr;
948
949 if (strlen(next) < 2 || next[0] != 'r') {
950 ERR("Wrong perf raw mask format: expected rNNN");
951 ret = -1;
952 goto end;
953 }
954 errno = 0;
955 type->opt->u.perf.config = strtoll(next + 1, &endptr, 16);
956 if (errno != 0 || !endptr || *endptr) {
957 ERR("Wrong perf raw mask format: expected rNNN");
958 ret = -1;
959 goto end;
960 }
961 break;
962 }
963 case 4:
964 /* name */
965 break;
966 case 5:
967 ERR("Too many ':' in perf raw format");
968 ret = -1;
969 goto end;
970 };
971 field_pos++;
972 }
973
974 if (field_pos < 5) {
975 ERR("Invalid perf counter specifier, expected a specifier of "
976 "the form perf:cpu:raw:rNNN:<name> or "
977 "perf:thread:raw:rNNN:<name>");
978 ret = -1;
979 goto end;
980 }
981
982 ret = 0;
983 goto end;
984
985end:
986 free(tmp_list);
987 return ret;
988}
989
990static
991struct ctx_type *get_context_type(const char *ctx)
992{
993 int opt_index, ret;
994 struct ctx_type *type = NULL;
995 const char app_ctx_prefix[] = "$app.";
996 char *provider_name = NULL, *ctx_name = NULL;
997 size_t i, len, colon_pos = 0, provider_name_len, ctx_name_len;
998
999 if (!ctx) {
1000 goto not_found;
1001 }
1002
1003 type = create_ctx_type();
1004 if (!type) {
1005 goto not_found;
1006 }
1007
1008 /* Check if ctx matches a known static context. */
1009 opt_index = find_ctx_type_idx(ctx);
1010 if (opt_index >= 0) {
1011 *type->opt = ctx_opts[opt_index];
1012 type->opt->symbol = strdup(ctx_opts[opt_index].symbol);
1013 goto found;
1014 }
1015
1016 /* Check if ctx is a raw perf context. */
1017 ret = find_ctx_type_perf_raw(ctx, type);
1018 if (ret == 0) {
1019 type->opt->u.perf.type = PERF_TYPE_RAW;
1020 type->opt->symbol = strdup(ctx);
1021 if (!type->opt->symbol) {
1022 PERROR("Copy perf field name");
1023 goto not_found;
1024 }
1025 goto found;
1026 }
1027
1028 /*
1029 * No match found against static contexts; check if it is an app
1030 * context.
1031 */
1032 len = strlen(ctx);
1033 if (len <= sizeof(app_ctx_prefix) - 1) {
1034 goto not_found;
1035 }
1036
1037 /* String starts with $app. */
1038 if (strncmp(ctx, app_ctx_prefix, sizeof(app_ctx_prefix) - 1)) {
1039 goto not_found;
1040 }
1041
1042 /* Validate that the ':' separator is present. */
1043 for (i = sizeof(app_ctx_prefix); i < len; i++) {
1044 const char c = ctx[i];
1045
1046 if (c == ':') {
1047 colon_pos = i;
1048 break;
1049 }
1050 }
1051
1052 /*
1053 * No colon found or no ctx name ("$app.provider:") or no provider name
1054 * given ("$app.:..."), which is invalid.
1055 */
1056 if (!colon_pos || colon_pos == len ||
1057 colon_pos == sizeof(app_ctx_prefix)) {
1058 ERR("Invalid application context provided: no provider or context name provided.");
1059 goto not_found;
1060 }
1061
1062 provider_name_len = colon_pos - sizeof(app_ctx_prefix) + 2;
1063 provider_name = zmalloc(provider_name_len);
1064 if (!provider_name) {
1065 PERROR("malloc provider_name");
1066 goto not_found;
1067 }
1068 strncpy(provider_name, ctx + sizeof(app_ctx_prefix) - 1,
1069 provider_name_len - 1);
1070 type->opt->u.app_ctx.provider_name = provider_name;
1071
1072 ctx_name_len = len - colon_pos;
1073 ctx_name = zmalloc(ctx_name_len);
1074 if (!ctx_name) {
1075 PERROR("malloc ctx_name");
1076 goto not_found;
1077 }
1078 strncpy(ctx_name, ctx + colon_pos + 1, ctx_name_len - 1);
1079 type->opt->u.app_ctx.ctx_name = ctx_name;
1080 type->opt->ctx_type = CONTEXT_APP_CONTEXT;
1081 type->opt->symbol = strdup(ctx);
1082found:
1083 return type;
1084not_found:
1085 free(provider_name);
1086 free(ctx_name);
1087 destroy_ctx_type(type);
1088 return NULL;
1089}
1090
1091/*
1092 * Add context to channel or event.
1093 */
1094int cmd_add_context(int argc, const char **argv)
1095{
1096 int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
1097 static poptContext pc;
1098 struct ctx_type *type, *tmptype;
1099 char *session_name = NULL;
1100 const char *leftover = NULL;
1101
1102 if (argc < 2) {
1103 ret = CMD_ERROR;
1104 goto end;
1105 }
1106
1107 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1108 poptReadDefaultConfig(pc, 0);
1109
1110 while ((opt = poptGetNextOpt(pc)) != -1) {
1111 switch (opt) {
1112 case OPT_HELP:
1113 SHOW_HELP();
1114 goto end;
1115 case OPT_LIST:
1116 ret = print_ctx_type();
1117 goto end;
1118 case OPT_TYPE:
1119 {
1120 type = get_context_type(opt_type);
1121 if (!type) {
1122 ERR("Unknown context type %s", opt_type);
1123 ret = CMD_FATAL;
1124 goto end;
1125 }
1126 cds_list_add_tail(&type->list, &ctx_type_list.head);
1127 break;
1128 }
1129 case OPT_USERSPACE:
1130 opt_userspace = 1;
1131 break;
1132 case OPT_JUL:
1133 opt_jul = 1;
1134 break;
1135 case OPT_LOG4J:
1136 opt_log4j = 1;
1137 break;
1138 case OPT_LIST_OPTIONS:
1139 list_cmd_options(stdout, long_options);
1140 goto end;
1141 default:
1142 ret = CMD_UNDEFINED;
1143 goto end;
1144 }
1145 }
1146
1147 leftover = poptGetArg(pc);
1148 if (leftover) {
1149 ERR("Unknown argument: %s", leftover);
1150 ret = CMD_ERROR;
1151 goto end;
1152 }
1153
1154 ret = print_missing_or_multiple_domains(
1155 opt_kernel + opt_userspace + opt_jul + opt_log4j, true);
1156 if (ret) {
1157 ret = CMD_ERROR;
1158 goto end;
1159 }
1160
1161 if (!opt_type) {
1162 ERR("Missing mandatory -t TYPE");
1163 ret = CMD_ERROR;
1164 goto end;
1165 }
1166
1167 if (!opt_session_name) {
1168 session_name = get_session_name();
1169 if (session_name == NULL) {
1170 ret = CMD_ERROR;
1171 goto end;
1172 }
1173 } else {
1174 session_name = opt_session_name;
1175 }
1176
1177 ret = mi_open();
1178 if (ret) {
1179 goto end;
1180 }
1181
1182 command_ret = add_context(session_name);
1183 ret = mi_close(command_ret);
1184 if (ret) {
1185 goto end;
1186 }
1187
1188end:
1189 if (!opt_session_name) {
1190 free(session_name);
1191 }
1192
1193 /* Mi clean-up */
1194 if (writer && mi_lttng_writer_destroy(writer)) {
1195 /* Preserve original error code */
1196 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
1197 }
1198
1199 /* Cleanup allocated memory */
1200 cds_list_for_each_entry_safe(type, tmptype, &ctx_type_list.head, list) {
1201 destroy_ctx_type(type);
1202 }
1203
1204 /* Overwrite ret if an error occurred during add_context() */
1205 ret = command_ret ? command_ret : ret;
1206
1207 poptFreeContext(pc);
1208 return ret;
1209}
LTTng 2.0 tools and control repository
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