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Enforce const-correctness in UNIX socket wrappers
[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 *
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.
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 *
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.
16 */
17
18#define _LGPL_SOURCE
19#include <ctype.h>
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>
27#include <assert.h>
28
29#include <urcu/list.h>
30
31#include <common/mi-lttng.h>
32
33#include "../command.h"
34
35#define PRINT_LINE_LEN 80
36
37static char *opt_channel_name;
38static char *opt_session_name;
39static int opt_kernel;
40static int opt_userspace;
41static char *opt_type;
42
43enum {
44 OPT_HELP = 1,
45 OPT_TYPE,
46 OPT_USERSPACE,
47 OPT_LIST_OPTIONS,
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};
73
74/*
75 * Taken from the Perf ABI (all enum perf_*)
76 */
77enum perf_type {
78 PERF_TYPE_HARDWARE = 0,
79 PERF_TYPE_SOFTWARE = 1,
80 PERF_TYPE_HW_CACHE = 3,
81};
82
83enum perf_count_hard {
84 PERF_COUNT_HW_CPU_CYCLES = 0,
85 PERF_COUNT_HW_INSTRUCTIONS = 1,
86 PERF_COUNT_HW_CACHE_REFERENCES = 2,
87 PERF_COUNT_HW_CACHE_MISSES = 3,
88 PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4,
89 PERF_COUNT_HW_BRANCH_MISSES = 5,
90 PERF_COUNT_HW_BUS_CYCLES = 6,
91 PERF_COUNT_HW_STALLED_CYCLES_FRONTEND = 7,
92 PERF_COUNT_HW_STALLED_CYCLES_BACKEND = 8,
93};
94
95enum perf_count_soft {
96 PERF_COUNT_SW_CPU_CLOCK = 0,
97 PERF_COUNT_SW_TASK_CLOCK = 1,
98 PERF_COUNT_SW_PAGE_FAULTS = 2,
99 PERF_COUNT_SW_CONTEXT_SWITCHES = 3,
100 PERF_COUNT_SW_CPU_MIGRATIONS = 4,
101 PERF_COUNT_SW_PAGE_FAULTS_MIN = 5,
102 PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6,
103 PERF_COUNT_SW_ALIGNMENT_FAULTS = 7,
104 PERF_COUNT_SW_EMULATION_FAULTS = 8,
105};
106
107/*
108 * Generalized hardware cache events:
109 *
110 * { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x
111 * { read, write, prefetch } x
112 * { accesses, misses }
113 */
114enum perf_hw_cache_id {
115 PERF_COUNT_HW_CACHE_L1D = 0,
116 PERF_COUNT_HW_CACHE_L1I = 1,
117 PERF_COUNT_HW_CACHE_LL = 2,
118 PERF_COUNT_HW_CACHE_DTLB = 3,
119 PERF_COUNT_HW_CACHE_ITLB = 4,
120 PERF_COUNT_HW_CACHE_BPU = 5,
121
122 PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
123};
124
125enum perf_hw_cache_op_id {
126 PERF_COUNT_HW_CACHE_OP_READ = 0,
127 PERF_COUNT_HW_CACHE_OP_WRITE = 1,
128 PERF_COUNT_HW_CACHE_OP_PREFETCH = 2,
129
130 PERF_COUNT_HW_CACHE_OP_MAX, /* non-ABI */
131};
132
133enum perf_hw_cache_op_result_id {
134 PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0,
135 PERF_COUNT_HW_CACHE_RESULT_MISS = 1,
136
137 PERF_COUNT_HW_CACHE_RESULT_MAX, /* non-ABI */
138};
139
140static struct poptOption long_options[] = {
141 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
142 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
143 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
144 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
145 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
146 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
147 {"type", 't', POPT_ARG_STRING, &opt_type, OPT_TYPE, 0, 0},
148 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
149 {0, 0, 0, 0, 0, 0, 0}
150};
151
152/*
153 * Context options
154 */
155#define PERF_HW(optstr, name, type, hide) \
156 { \
157 optstr, type, hide, \
158 .u.perf = { PERF_TYPE_HARDWARE, PERF_COUNT_HW_##name, },\
159 }
160
161#define PERF_SW(optstr, name, type, hide) \
162 { \
163 optstr, type, hide, \
164 .u.perf = { PERF_TYPE_SOFTWARE, PERF_COUNT_SW_##name, },\
165 }
166
167#define _PERF_HW_CACHE(optstr, name, type, op, result, hide) \
168 { \
169 optstr, type, hide, \
170 .u.perf = { \
171 PERF_TYPE_HW_CACHE, \
172 (uint64_t) PERF_COUNT_HW_CACHE_##name \
173 | ((uint64_t) PERF_COUNT_HW_CACHE_OP_##op << 8) \
174 | ((uint64_t) PERF_COUNT_HW_CACHE_RESULT_##result << 16), \
175 }, \
176 }
177
178#define PERF_HW_CACHE(optstr, name, type, hide) \
179 _PERF_HW_CACHE(optstr "-loads", name, type, \
180 READ, ACCESS, hide), \
181 _PERF_HW_CACHE(optstr "-load-misses", name, type, \
182 READ, MISS, hide), \
183 _PERF_HW_CACHE(optstr "-stores", name, type, \
184 WRITE, ACCESS, hide), \
185 _PERF_HW_CACHE(optstr "-store-misses", name, type, \
186 WRITE, MISS, hide), \
187 _PERF_HW_CACHE(optstr "-prefetches", name, type, \
188 PREFETCH, ACCESS, hide), \
189 _PERF_HW_CACHE(optstr "-prefetch-misses", name, type, \
190 PREFETCH, MISS, hide)
191
192static
193const struct ctx_opts {
194 char *symbol;
195 enum context_type ctx_type;
196 int hide_help; /* Hide from --help */
197 union {
198 struct {
199 uint32_t type;
200 uint64_t config;
201 } perf;
202 } u;
203} ctx_opts[] = {
204 { "pid", CONTEXT_PID },
205 { "procname", CONTEXT_PROCNAME },
206 { "prio", CONTEXT_PRIO },
207 { "nice", CONTEXT_NICE },
208 { "vpid", CONTEXT_VPID },
209 { "tid", CONTEXT_TID },
210 { "pthread_id", CONTEXT_PTHREAD_ID },
211 { "vtid", CONTEXT_VTID },
212 { "ppid", CONTEXT_PPID },
213 { "vppid", CONTEXT_VPPID },
214 { "hostname", CONTEXT_HOSTNAME },
215 { "ip", CONTEXT_IP },
216
217 /* Perf options */
218
219 /* Perf per-CPU counters */
220 PERF_HW("perf:cpu:cpu-cycles", CPU_CYCLES,
221 CONTEXT_PERF_CPU_COUNTER, 0),
222 PERF_HW("perf:cpu:cycles", CPU_CYCLES,
223 CONTEXT_PERF_CPU_COUNTER, 0),
224 PERF_HW("perf:cpu:stalled-cycles-frontend", STALLED_CYCLES_FRONTEND,
225 CONTEXT_PERF_CPU_COUNTER, 0),
226 PERF_HW("perf:cpu:idle-cycles-frontend", STALLED_CYCLES_FRONTEND,
227 CONTEXT_PERF_CPU_COUNTER, 0),
228 PERF_HW("perf:cpu:stalled-cycles-backend", STALLED_CYCLES_BACKEND,
229 CONTEXT_PERF_CPU_COUNTER, 0),
230 PERF_HW("perf:cpu:idle-cycles-backend", STALLED_CYCLES_BACKEND,
231 CONTEXT_PERF_CPU_COUNTER, 0),
232 PERF_HW("perf:cpu:instructions", INSTRUCTIONS,
233 CONTEXT_PERF_CPU_COUNTER, 0),
234 PERF_HW("perf:cpu:cache-references", CACHE_REFERENCES,
235 CONTEXT_PERF_CPU_COUNTER, 0),
236 PERF_HW("perf:cpu:cache-misses", CACHE_MISSES,
237 CONTEXT_PERF_CPU_COUNTER, 0),
238 PERF_HW("perf:cpu:branch-instructions", BRANCH_INSTRUCTIONS,
239 CONTEXT_PERF_CPU_COUNTER, 0),
240 PERF_HW("perf:cpu:branches", BRANCH_INSTRUCTIONS,
241 CONTEXT_PERF_CPU_COUNTER, 0),
242 PERF_HW("perf:cpu:branch-misses", BRANCH_MISSES,
243 CONTEXT_PERF_CPU_COUNTER, 0),
244 PERF_HW("perf:cpu:bus-cycles", BUS_CYCLES,
245 CONTEXT_PERF_CPU_COUNTER, 0),
246
247 PERF_HW_CACHE("perf:cpu:L1-dcache", L1D,
248 CONTEXT_PERF_CPU_COUNTER, 0),
249 PERF_HW_CACHE("perf:cpu:L1-icache", L1I,
250 CONTEXT_PERF_CPU_COUNTER, 0),
251 PERF_HW_CACHE("perf:cpu:LLC", LL,
252 CONTEXT_PERF_CPU_COUNTER, 0),
253 PERF_HW_CACHE("perf:cpu:dTLB", DTLB,
254 CONTEXT_PERF_CPU_COUNTER, 0),
255 _PERF_HW_CACHE("perf:cpu:iTLB-loads", ITLB,
256 CONTEXT_PERF_CPU_COUNTER, READ, ACCESS, 0),
257 _PERF_HW_CACHE("perf:cpu:iTLB-load-misses", ITLB,
258 CONTEXT_PERF_CPU_COUNTER, READ, MISS, 0),
259 _PERF_HW_CACHE("perf:cpu:branch-loads", BPU,
260 CONTEXT_PERF_CPU_COUNTER, READ, ACCESS, 0),
261 _PERF_HW_CACHE("perf:cpu:branch-load-misses", BPU,
262 CONTEXT_PERF_CPU_COUNTER, READ, MISS, 0),
263
264 PERF_SW("perf:cpu:cpu-clock", CPU_CLOCK,
265 CONTEXT_PERF_CPU_COUNTER, 0),
266 PERF_SW("perf:cpu:task-clock", TASK_CLOCK,
267 CONTEXT_PERF_CPU_COUNTER, 0),
268 PERF_SW("perf:cpu:page-fault", PAGE_FAULTS,
269 CONTEXT_PERF_CPU_COUNTER, 0),
270 PERF_SW("perf:cpu:faults", PAGE_FAULTS,
271 CONTEXT_PERF_CPU_COUNTER, 0),
272 PERF_SW("perf:cpu:major-faults", PAGE_FAULTS_MAJ,
273 CONTEXT_PERF_CPU_COUNTER, 0),
274 PERF_SW("perf:cpu:minor-faults", PAGE_FAULTS_MIN,
275 CONTEXT_PERF_CPU_COUNTER, 0),
276 PERF_SW("perf:cpu:context-switches", CONTEXT_SWITCHES,
277 CONTEXT_PERF_CPU_COUNTER, 0),
278 PERF_SW("perf:cpu:cs", CONTEXT_SWITCHES,
279 CONTEXT_PERF_CPU_COUNTER, 0),
280 PERF_SW("perf:cpu:cpu-migrations", CPU_MIGRATIONS,
281 CONTEXT_PERF_CPU_COUNTER, 0),
282 PERF_SW("perf:cpu:migrations", CPU_MIGRATIONS,
283 CONTEXT_PERF_CPU_COUNTER, 0),
284 PERF_SW("perf:cpu:alignment-faults", ALIGNMENT_FAULTS,
285 CONTEXT_PERF_CPU_COUNTER, 0),
286 PERF_SW("perf:cpu:emulation-faults", EMULATION_FAULTS,
287 CONTEXT_PERF_CPU_COUNTER, 0),
288
289 /* Perf per-thread counters */
290 PERF_HW("perf:thread:cpu-cycles", CPU_CYCLES,
291 CONTEXT_PERF_THREAD_COUNTER, 0),
292 PERF_HW("perf:thread:cycles", CPU_CYCLES,
293 CONTEXT_PERF_THREAD_COUNTER, 0),
294 PERF_HW("perf:thread:stalled-cycles-frontend", STALLED_CYCLES_FRONTEND,
295 CONTEXT_PERF_THREAD_COUNTER, 0),
296 PERF_HW("perf:thread:idle-cycles-frontend", STALLED_CYCLES_FRONTEND,
297 CONTEXT_PERF_THREAD_COUNTER, 0),
298 PERF_HW("perf:thread:stalled-cycles-backend", STALLED_CYCLES_BACKEND,
299 CONTEXT_PERF_THREAD_COUNTER, 0),
300 PERF_HW("perf:thread:idle-cycles-backend", STALLED_CYCLES_BACKEND,
301 CONTEXT_PERF_THREAD_COUNTER, 0),
302 PERF_HW("perf:thread:instructions", INSTRUCTIONS,
303 CONTEXT_PERF_THREAD_COUNTER, 0),
304 PERF_HW("perf:thread:cache-references", CACHE_REFERENCES,
305 CONTEXT_PERF_THREAD_COUNTER, 0),
306 PERF_HW("perf:thread:cache-misses", CACHE_MISSES,
307 CONTEXT_PERF_THREAD_COUNTER, 0),
308 PERF_HW("perf:thread:branch-instructions", BRANCH_INSTRUCTIONS,
309 CONTEXT_PERF_THREAD_COUNTER, 0),
310 PERF_HW("perf:thread:branches", BRANCH_INSTRUCTIONS,
311 CONTEXT_PERF_THREAD_COUNTER, 0),
312 PERF_HW("perf:thread:branch-misses", BRANCH_MISSES,
313 CONTEXT_PERF_THREAD_COUNTER, 0),
314 PERF_HW("perf:thread:bus-cycles", BUS_CYCLES,
315 CONTEXT_PERF_THREAD_COUNTER, 0),
316
317 PERF_HW_CACHE("perf:thread:L1-dcache", L1D,
318 CONTEXT_PERF_THREAD_COUNTER, 0),
319 PERF_HW_CACHE("perf:thread:L1-icache", L1I,
320 CONTEXT_PERF_THREAD_COUNTER, 0),
321 PERF_HW_CACHE("perf:thread:LLC", LL,
322 CONTEXT_PERF_THREAD_COUNTER, 0),
323 PERF_HW_CACHE("perf:thread:dTLB", DTLB,
324 CONTEXT_PERF_THREAD_COUNTER, 0),
325 _PERF_HW_CACHE("perf:thread:iTLB-loads", ITLB,
326 CONTEXT_PERF_THREAD_COUNTER, READ, ACCESS, 0),
327 _PERF_HW_CACHE("perf:thread:iTLB-load-misses", ITLB,
328 CONTEXT_PERF_THREAD_COUNTER, READ, MISS, 0),
329 _PERF_HW_CACHE("perf:thread:branch-loads", BPU,
330 CONTEXT_PERF_THREAD_COUNTER, READ, ACCESS, 0),
331 _PERF_HW_CACHE("perf:thread:branch-load-misses", BPU,
332 CONTEXT_PERF_THREAD_COUNTER, READ, MISS, 0),
333
334 PERF_SW("perf:thread:cpu-clock", CPU_CLOCK,
335 CONTEXT_PERF_THREAD_COUNTER, 0),
336 PERF_SW("perf:thread:task-clock", TASK_CLOCK,
337 CONTEXT_PERF_THREAD_COUNTER, 0),
338 PERF_SW("perf:thread:page-fault", PAGE_FAULTS,
339 CONTEXT_PERF_THREAD_COUNTER, 0),
340 PERF_SW("perf:thread:faults", PAGE_FAULTS,
341 CONTEXT_PERF_THREAD_COUNTER, 0),
342 PERF_SW("perf:thread:major-faults", PAGE_FAULTS_MAJ,
343 CONTEXT_PERF_THREAD_COUNTER, 0),
344 PERF_SW("perf:thread:minor-faults", PAGE_FAULTS_MIN,
345 CONTEXT_PERF_THREAD_COUNTER, 0),
346 PERF_SW("perf:thread:context-switches", CONTEXT_SWITCHES,
347 CONTEXT_PERF_THREAD_COUNTER, 0),
348 PERF_SW("perf:thread:cs", CONTEXT_SWITCHES,
349 CONTEXT_PERF_THREAD_COUNTER, 0),
350 PERF_SW("perf:thread:cpu-migrations", CPU_MIGRATIONS,
351 CONTEXT_PERF_THREAD_COUNTER, 0),
352 PERF_SW("perf:thread:migrations", CPU_MIGRATIONS,
353 CONTEXT_PERF_THREAD_COUNTER, 0),
354 PERF_SW("perf:thread:alignment-faults", ALIGNMENT_FAULTS,
355 CONTEXT_PERF_THREAD_COUNTER, 0),
356 PERF_SW("perf:thread:emulation-faults", EMULATION_FAULTS,
357 CONTEXT_PERF_THREAD_COUNTER, 0),
358
359 /*
360 * Perf per-CPU counters, backward compatibilty for names.
361 * Hidden from help listing.
362 */
363 PERF_HW("perf:cpu-cycles", CPU_CYCLES,
364 CONTEXT_PERF_COUNTER, 1),
365 PERF_HW("perf:cycles", CPU_CYCLES,
366 CONTEXT_PERF_COUNTER, 1),
367 PERF_HW("perf:stalled-cycles-frontend", STALLED_CYCLES_FRONTEND,
368 CONTEXT_PERF_COUNTER, 1),
369 PERF_HW("perf:idle-cycles-frontend", STALLED_CYCLES_FRONTEND,
370 CONTEXT_PERF_COUNTER, 1),
371 PERF_HW("perf:stalled-cycles-backend", STALLED_CYCLES_BACKEND,
372 CONTEXT_PERF_COUNTER, 1),
373 PERF_HW("perf:idle-cycles-backend", STALLED_CYCLES_BACKEND,
374 CONTEXT_PERF_COUNTER, 1),
375 PERF_HW("perf:instructions", INSTRUCTIONS,
376 CONTEXT_PERF_COUNTER, 1),
377 PERF_HW("perf:cache-references", CACHE_REFERENCES,
378 CONTEXT_PERF_COUNTER, 1),
379 PERF_HW("perf:cache-misses", CACHE_MISSES,
380 CONTEXT_PERF_COUNTER, 1),
381 PERF_HW("perf:branch-instructions", BRANCH_INSTRUCTIONS,
382 CONTEXT_PERF_COUNTER, 1),
383 PERF_HW("perf:branches", BRANCH_INSTRUCTIONS,
384 CONTEXT_PERF_COUNTER, 1),
385 PERF_HW("perf:branch-misses", BRANCH_MISSES,
386 CONTEXT_PERF_COUNTER, 1),
387 PERF_HW("perf:bus-cycles", BUS_CYCLES,
388 CONTEXT_PERF_COUNTER, 1),
389
390 PERF_HW_CACHE("perf:L1-dcache", L1D,
391 CONTEXT_PERF_COUNTER, 1),
392 PERF_HW_CACHE("perf:L1-icache", L1I,
393 CONTEXT_PERF_COUNTER, 1),
394 PERF_HW_CACHE("perf:LLC", LL,
395 CONTEXT_PERF_COUNTER, 1),
396 PERF_HW_CACHE("perf:dTLB", DTLB,
397 CONTEXT_PERF_COUNTER, 1),
398 _PERF_HW_CACHE("perf:iTLB-loads", ITLB,
399 CONTEXT_PERF_COUNTER, READ, ACCESS, 1),
400 _PERF_HW_CACHE("perf:iTLB-load-misses", ITLB,
401 CONTEXT_PERF_COUNTER, READ, MISS, 1),
402 _PERF_HW_CACHE("perf:branch-loads", BPU,
403 CONTEXT_PERF_COUNTER, READ, ACCESS, 1),
404 _PERF_HW_CACHE("perf:branch-load-misses", BPU,
405 CONTEXT_PERF_COUNTER, READ, MISS, 1),
406
407 PERF_SW("perf:cpu-clock", CPU_CLOCK,
408 CONTEXT_PERF_COUNTER, 1),
409 PERF_SW("perf:task-clock", TASK_CLOCK,
410 CONTEXT_PERF_COUNTER, 1),
411 PERF_SW("perf:page-fault", PAGE_FAULTS,
412 CONTEXT_PERF_COUNTER, 1),
413 PERF_SW("perf:faults", PAGE_FAULTS,
414 CONTEXT_PERF_COUNTER, 1),
415 PERF_SW("perf:major-faults", PAGE_FAULTS_MAJ,
416 CONTEXT_PERF_COUNTER, 1),
417 PERF_SW("perf:minor-faults", PAGE_FAULTS_MIN,
418 CONTEXT_PERF_COUNTER, 1),
419 PERF_SW("perf:context-switches", CONTEXT_SWITCHES,
420 CONTEXT_PERF_COUNTER, 1),
421 PERF_SW("perf:cs", CONTEXT_SWITCHES,
422 CONTEXT_PERF_COUNTER, 1),
423 PERF_SW("perf:cpu-migrations", CPU_MIGRATIONS,
424 CONTEXT_PERF_COUNTER, 1),
425 PERF_SW("perf:migrations", CPU_MIGRATIONS,
426 CONTEXT_PERF_COUNTER, 1),
427 PERF_SW("perf:alignment-faults", ALIGNMENT_FAULTS,
428 CONTEXT_PERF_COUNTER, 1),
429 PERF_SW("perf:emulation-faults", EMULATION_FAULTS,
430 CONTEXT_PERF_COUNTER, 1),
431
432 { NULL, -1 }, /* Closure */
433};
434
435#undef PERF_HW_CACHE
436#undef _PERF_HW_CACHE
437#undef PERF_SW
438#undef PERF_HW
439
440/*
441 * Context type for command line option parsing.
442 */
443struct ctx_type {
444 const struct ctx_opts *opt;
445 struct cds_list_head list;
446};
447
448/*
449 * List of context type. Use to enable multiple context on a single command
450 * line entry.
451 */
452struct ctx_type_list {
453 struct cds_list_head head;
454} ctx_type_list = {
455 .head = CDS_LIST_HEAD_INIT(ctx_type_list.head),
456};
457
458/*
459 * Pretty print context type.
460 */
461static void print_ctx_type(FILE *ofp)
462{
463 const char *indent = " ";
464 int indent_len = strlen(indent);
465 int len, i = 0;
466
467 fprintf(ofp, "%s", indent);
468 len = indent_len;
469 while (ctx_opts[i].symbol != NULL) {
470 if (!ctx_opts[i].hide_help) {
471 if (len > indent_len) {
472 if (len + strlen(ctx_opts[i].symbol) + 2
473 >= PRINT_LINE_LEN) {
474 fprintf(ofp, ",\n");
475 fprintf(ofp, "%s", indent);
476 len = indent_len;
477 } else {
478 len += fprintf(ofp, ", ");
479 }
480 }
481 len += fprintf(ofp, "%s", ctx_opts[i].symbol);
482 }
483 i++;
484 }
485}
486
487/*
488 * usage
489 */
490static void usage(FILE *ofp)
491{
492 fprintf(ofp, "usage: lttng add-context -t TYPE [-k|-u] [OPTIONS]\n");
493 fprintf(ofp, "\n");
494 fprintf(ofp, "If no channel is given (-c), the context is added to\n");
495 fprintf(ofp, "all channels.\n");
496 fprintf(ofp, "\n");
497 fprintf(ofp, "Otherwise the context is added only to the channel (-c).\n");
498 fprintf(ofp, "\n");
499 fprintf(ofp, "Exactly one domain (-k or -u) must be specified.\n");
500 fprintf(ofp, "\n");
501 fprintf(ofp, "Options:\n");
502 fprintf(ofp, " -h, --help Show this help\n");
503 fprintf(ofp, " --list-options Simple listing of options\n");
504 fprintf(ofp, " -s, --session NAME Apply to session name\n");
505 fprintf(ofp, " -c, --channel NAME Apply to channel\n");
506 fprintf(ofp, " -k, --kernel Apply to the kernel tracer\n");
507 fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
508 fprintf(ofp, "\n");
509 fprintf(ofp, "Context:\n");
510 fprintf(ofp, " -t, --type TYPE Context type. You can repeat that option on\n");
511 fprintf(ofp, " the command line to specify multiple contexts at once.\n");
512 fprintf(ofp, " (--kernel preempts --userspace)\n");
513 fprintf(ofp, " TYPE can be one of the strings below:\n");
514 print_ctx_type(ofp);
515 fprintf(ofp, "\n");
516 fprintf(ofp, "Note that the vpid, vppid and vtid context types represent the virtual process id,\n"
517 "virtual parent process id and virtual thread id as seen from the current execution context\n"
518 "as opposed to the pid, ppid and tid which are kernel internal data structures.\n\n");
519 fprintf(ofp, "Example:\n");
520 fprintf(ofp, "This command will add the context information 'prio' and two per-cpu\n"
521 "perf counters (hardware branch misses and cache misses), to all channels\n"
522 "in the trace data output:\n");
523 fprintf(ofp, "# lttng add-context -k -t prio -t perf:cpu:branch-misses -t perf:cpu:cache-misses\n");
524 fprintf(ofp, "\n");
525}
526
527/*
528 * Find context numerical value from string.
529 */
530static int find_ctx_type_idx(const char *opt)
531{
532 int ret = -1, i = 0;
533
534 while (ctx_opts[i].symbol != NULL) {
535 if (strcmp(opt, ctx_opts[i].symbol) == 0) {
536 ret = i;
537 goto end;
538 }
539 i++;
540 }
541
542end:
543 return ret;
544}
545
546/*
547 * Add context to channel or event.
548 */
549static int add_context(char *session_name)
550{
551 int ret = CMD_SUCCESS, warn = 0, success = 0;
552 struct lttng_event_context context;
553 struct lttng_domain dom;
554 struct ctx_type *type;
555 char *ptr;
556
557 memset(&context, 0, sizeof(context));
558 memset(&dom, 0, sizeof(dom));
559
560 if (opt_kernel) {
561 dom.type = LTTNG_DOMAIN_KERNEL;
562 } else if (opt_userspace) {
563 dom.type = LTTNG_DOMAIN_UST;
564 } else {
565 assert(0);
566 }
567
568 handle = lttng_create_handle(session_name, &dom);
569 if (handle == NULL) {
570 ret = CMD_ERROR;
571 goto error;
572 }
573
574 if (lttng_opt_mi) {
575 /* Open a contexts element */
576 ret = mi_lttng_writer_open_element(writer, config_element_contexts);
577 if (ret) {
578 goto error;
579 }
580 }
581
582 /* Iterate over all the context types given */
583 cds_list_for_each_entry(type, &ctx_type_list.head, list) {
584 context.ctx = (enum lttng_event_context_type) type->opt->ctx_type;
585 switch (context.ctx) {
586 case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
587 case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
588 case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
589 context.u.perf_counter.type = type->opt->u.perf.type;
590 context.u.perf_counter.config = type->opt->u.perf.config;
591 strncpy(context.u.perf_counter.name, type->opt->symbol,
592 LTTNG_SYMBOL_NAME_LEN);
593 context.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
594 /* Replace : and - by _ */
595 while ((ptr = strchr(context.u.perf_counter.name, '-')) != NULL) {
596 *ptr = '_';
597 }
598 while ((ptr = strchr(context.u.perf_counter.name, ':')) != NULL) {
599 *ptr = '_';
600 }
601 break;
602 default:
603 break;
604 }
605 DBG("Adding context...");
606
607 if (lttng_opt_mi) {
608 /* We leave context open the update the success of the command */
609 ret = mi_lttng_context(writer, &context, 1);
610 if (ret) {
611 ret = CMD_ERROR;
612 goto error;
613 }
614 }
615
616 ret = lttng_add_context(handle, &context, NULL, opt_channel_name);
617 if (ret < 0) {
618 ERR("%s: %s", type->opt->symbol, lttng_strerror(ret));
619 warn = 1;
620 success = 0;
621 } else {
622 if (opt_channel_name) {
623 MSG("%s context %s added to channel %s",
624 opt_kernel ? "kernel" : "UST", type->opt->symbol,
625 opt_channel_name);
626 } else {
627 MSG("%s context %s added to all channels",
628 opt_kernel ? "kernel" : "UST", type->opt->symbol)
629 }
630 success = 1;
631 }
632
633 if (lttng_opt_mi) {
634 /* Is the single operation a success ? */
635 ret = mi_lttng_writer_write_element_bool(writer,
636 mi_lttng_element_success, success);
637 if (ret) {
638 ret = CMD_ERROR;
639 goto error;
640 }
641
642 /* Close the context element */
643 ret = mi_lttng_writer_close_element(writer);
644 if (ret) {
645 ret = CMD_ERROR;
646 goto error;
647 }
648 }
649 }
650
651 if (lttng_opt_mi) {
652 /* Close contexts element */
653 ret = mi_lttng_writer_close_element(writer);
654 if (ret) {
655 goto error;
656 }
657 }
658
659 ret = CMD_SUCCESS;
660
661error:
662 lttng_destroy_handle(handle);
663
664 /*
665 * This means that at least one add_context failed and tells the user to
666 * look on stderr for error(s).
667 */
668 if (!ret && warn) {
669 ret = CMD_WARNING;
670 }
671 return ret;
672}
673
674/*
675 * Add context to channel or event.
676 */
677int cmd_add_context(int argc, const char **argv)
678{
679 int index, opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
680 int success = 1;
681 static poptContext pc;
682 struct ctx_type *type, *tmptype;
683 char *session_name = NULL;
684
685 if (argc < 2) {
686 usage(stderr);
687 ret = CMD_ERROR;
688 goto end;
689 }
690
691 pc = poptGetContext(NULL, argc, argv, long_options, 0);
692 poptReadDefaultConfig(pc, 0);
693
694 while ((opt = poptGetNextOpt(pc)) != -1) {
695 switch (opt) {
696 case OPT_HELP:
697 usage(stdout);
698 goto end;
699 case OPT_TYPE:
700 /*
701 * Look up the index of opt_type in ctx_opts[] first, so we don't
702 * have to free(type) on failure.
703 */
704 index = find_ctx_type_idx(opt_type);
705 if (index < 0) {
706 ERR("Unknown context type %s", opt_type);
707 ret = CMD_ERROR;
708 goto end;
709 }
710
711 type = zmalloc(sizeof(struct ctx_type));
712 if (type == NULL) {
713 PERROR("malloc ctx_type");
714 ret = CMD_FATAL;
715 goto end;
716 }
717
718 type->opt = &ctx_opts[index];
719 if (type->opt->symbol == NULL) {
720 ERR("Unknown context type %s", opt_type);
721 free(type);
722 ret = CMD_ERROR;
723 goto end;
724 } else {
725 cds_list_add_tail(&type->list, &ctx_type_list.head);
726 }
727 break;
728 case OPT_USERSPACE:
729 opt_userspace = 1;
730 break;
731 case OPT_LIST_OPTIONS:
732 list_cmd_options(stdout, long_options);
733 goto end;
734 default:
735 usage(stderr);
736 ret = CMD_UNDEFINED;
737 goto end;
738 }
739 }
740
741 ret = print_missing_or_multiple_domains(opt_kernel + opt_userspace);
742
743 if (ret) {
744 ret = CMD_ERROR;
745 goto end;
746 }
747
748 if (!opt_type) {
749 ERR("Missing mandatory -t TYPE");
750 usage(stderr);
751 ret = CMD_ERROR;
752 goto end;
753 }
754
755 if (!opt_session_name) {
756 session_name = get_session_name();
757 if (session_name == NULL) {
758 ret = CMD_ERROR;
759 goto end;
760 }
761 } else {
762 session_name = opt_session_name;
763 }
764
765 /* Mi check */
766 if (lttng_opt_mi) {
767 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
768 if (!writer) {
769 ret = -LTTNG_ERR_NOMEM;
770 goto end;
771 }
772
773 /* Open command element */
774 ret = mi_lttng_writer_command_open(writer,
775 mi_lttng_element_command_add_context);
776 if (ret) {
777 ret = CMD_ERROR;
778 goto end;
779 }
780
781 /* Open output element */
782 ret = mi_lttng_writer_open_element(writer,
783 mi_lttng_element_command_output);
784 if (ret) {
785 ret = CMD_ERROR;
786 goto end;
787 }
788 }
789
790 command_ret = add_context(session_name);
791 if (command_ret) {
792 success = 0;
793 }
794
795 /* Mi closing */
796 if (lttng_opt_mi) {
797 /* Close output element */
798 ret = mi_lttng_writer_close_element(writer);
799 if (ret) {
800 ret = CMD_ERROR;
801 goto end;
802 }
803
804 /* Success ? */
805 ret = mi_lttng_writer_write_element_bool(writer,
806 mi_lttng_element_command_success, success);
807 if (ret) {
808 ret = CMD_ERROR;
809 goto end;
810 }
811
812 /* Command element close */
813 ret = mi_lttng_writer_command_close(writer);
814 if (ret) {
815 ret = CMD_ERROR;
816 goto end;
817 }
818 }
819
820end:
821 if (!opt_session_name) {
822 free(session_name);
823 }
824
825 /* Mi clean-up */
826 if (writer && mi_lttng_writer_destroy(writer)) {
827 /* Preserve original error code */
828 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
829 }
830
831 /* Cleanup allocated memory */
832 cds_list_for_each_entry_safe(type, tmptype, &ctx_type_list.head, list) {
833 free(type);
834 }
835
836 /* Overwrite ret if an error occurred during add_context() */
837 ret = command_ret ? command_ret : ret;
838
839 poptFreeContext(pc);
840 return ret;
841}
LTTng tools - Deliverables
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