Add comment for the session list lock
[lttng-tools.git] / lttng / commands / add_context.c
CommitLineData
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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
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
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>
27
28#include "cmd.h"
29#include "conf.h"
30#include "utils.h"
31
32static char *opt_event_name;
33static char *opt_channel_name;
34static char *opt_perf_name;
5440dc42 35static char *opt_session_name;
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36static int *opt_kernel;
37static int opt_pid_all;
38static int opt_userspace;
39static int opt_ctx_type;
40static int opt_perf_type;
41static int opt_perf_id;
42static pid_t opt_pid;
43
44enum {
45 OPT_HELP = 1,
46 OPT_TYPE,
47};
48
49static struct poptOption long_options[] = {
50 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
51 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42 52 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
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53 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
54 {"event", 'e', POPT_ARG_STRING, &opt_event_name, 0, 0, 0},
55 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
56 {"userspace", 'u', POPT_ARG_VAL, &opt_userspace, 1, 0, 0},
57 {"all", 0, POPT_ARG_VAL, &opt_pid_all, 1, 0, 0},
58 {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
59 {"type", 't', POPT_ARG_INT, 0, OPT_TYPE, 0, 0},
60 {"perf-name", 0, POPT_ARG_STRING, &opt_perf_name, 0, 0, 0},
61 {"perf-type", 0, POPT_ARG_INT, &opt_perf_type, 0, 0, 0},
62 {"perf-id", 0, POPT_ARG_INT, &opt_perf_id, 0, 0, 0},
63 {0, 0, 0, 0, 0, 0, 0}
64};
65
66/*
67 * usage
68 */
69static void usage(FILE *ofp)
70{
71 fprintf(ofp, "usage: lttng add-context [options] [context_options]\n");
72 fprintf(ofp, "\n");
73 fprintf(ofp, "Options:\n");
74 fprintf(ofp, " -h, --help Show this help\n");
5440dc42 75 fprintf(ofp, " -s, --session Apply on session name\n");
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76 fprintf(ofp, " -c, --channel NAME Apply on channel\n");
77 fprintf(ofp, " -e, --event NAME Apply on event\n");
78 fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
79 fprintf(ofp, " -u, --userspace Apply for the user-space tracer\n");
80 fprintf(ofp, " --all If -u, apply on all traceable apps\n");
81 fprintf(ofp, " -p, --pid PID If -u, apply on a specific PID\n");
82 fprintf(ofp, " -t, --type TYPE Context type. TYPE must be a numerical value:\n");
83 fprintf(ofp, " KERNEL_CONTEXT_PID = 0\n");
84 fprintf(ofp, " KERNEL_CONTEXT_PERF_COUNTER = 1\n");
85 fprintf(ofp, " KERNEL_CONTEXT_COMM = 2\n");
86 fprintf(ofp, " KERNEL_CONTEXT_PRIO = 3\n");
87 fprintf(ofp, " KERNEL_CONTEXT_NICE = 4\n");
88 fprintf(ofp, " KERNEL_CONTEXT_VPID = 5\n");
89 fprintf(ofp, " KERNEL_CONTEXT_TID = 6\n");
90 fprintf(ofp, " KERNEL_CONTEXT_VTID = 7\n");
91 fprintf(ofp, " KERNEL_CONTEXT_PPID = 8\n");
92 fprintf(ofp, " KERNEL_CONTEXT_VPPID = 9\n");
93 fprintf(ofp, "\n");
94 fprintf(ofp, "Context options:\n");
95 fprintf(ofp, " --perf-name NAME Perf event name\n");
96 fprintf(ofp, " --perf-type TYPE Perf event type. TYPE must be a numeric value:\n");
97 fprintf(ofp, " PERF_TYPE_HARDWARE = 0\n");
98 fprintf(ofp, " PERF_TYPE_SOFTWARE = 1\n");
99 fprintf(ofp, " --perf-id ID Perf event id. ID must be a numeric value:\n");
100 fprintf(ofp, " Hardware IDs (0):\n");
101 fprintf(ofp, " PERF_COUNT_HW_CPU_CYCLES = 0\n");
102 fprintf(ofp, " PERF_COUNT_HW_INSTRUCTIONS = 1\n");
103 fprintf(ofp, " PERF_COUNT_HW_CACHE_REFERENCES = 2\n");
104 fprintf(ofp, " PERF_COUNT_HW_CACHE_MISSES = 3\n");
105 fprintf(ofp, " PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4\n");
106 fprintf(ofp, " PERF_COUNT_HW_BRANCH_MISSES = 5\n");
107 fprintf(ofp, " PERF_COUNT_HW_BUS_CYCLES = 6\n");
108 fprintf(ofp, " Software IDs (1):\n");
109 fprintf(ofp, " PERF_COUNT_SW_CPU_CLOCK = 0\n");
110 fprintf(ofp, " PERF_COUNT_SW_TASK_CLOCK = 1\n");
111 fprintf(ofp, " PERF_COUNT_SW_PAGE_FAULTS = 2\n");
112 fprintf(ofp, " PERF_COUNT_SW_CONTEXT_SWITCHES = 3\n");
113 fprintf(ofp, " PERF_COUNT_SW_CPU_MIGRATIONS = 4\n");
114 fprintf(ofp, " PERF_COUNT_SW_PAGE_FAULTS_MIN = 5\n");
115 fprintf(ofp, " PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6\n");
116 fprintf(ofp, "\n");
117}
118
119/*
120 * add_context
121 *
122 * Add context to channel or event.
123 */
124static int add_context(void)
125{
126 int ret = CMD_SUCCESS;
127 struct lttng_kernel_context context;
128
5440dc42 129 if (set_session_name(opt_session_name) < 0) {
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130 ret = CMD_ERROR;
131 goto error;
132 }
133
134 context.ctx = opt_ctx_type;
135 if (opt_ctx_type == LTTNG_KERNEL_CONTEXT_PERF_COUNTER) {
136 context.u.perf_counter.type = opt_perf_type;
137 context.u.perf_counter.config = opt_perf_id;
138 strncpy(context.u.perf_counter.name, opt_perf_name,
139 LTTNG_SYMBOL_NAME_LEN);
140 }
141
142 if (opt_kernel) {
143 DBG("Adding kernel context\n");
144 ret = lttng_kernel_add_context(&context, opt_event_name, opt_channel_name);
145 if (ret < 0) {
146 goto error;
147 } else {
148 MSG("Kernel context added");
149 }
150 } else if (opt_userspace) { /* User-space tracer action */
151 /*
152 * TODO: Waiting on lttng UST 2.0
153 */
154 if (opt_pid_all) {
155 } else if (opt_pid != 0) {
156 }
157 ret = CMD_NOT_IMPLEMENTED;
158 goto error;
159 } else {
160 ERR("Please specify a tracer (kernel or user-space)");
161 goto error;
162 }
163
164error:
165 return ret;
166}
167
168/*
169 * cmd_add_context
170 *
171 * Add context on channel or event.
172 */
173int cmd_add_context(int argc, const char **argv)
174{
175 int opt, ret;
176 char *tmp;
177 static poptContext pc;
178
179 pc = poptGetContext(NULL, argc, argv, long_options, 0);
180 poptReadDefaultConfig(pc, 0);
181
182 while ((opt = poptGetNextOpt(pc)) != -1) {
183 switch (opt) {
184 case OPT_HELP:
185 usage(stderr);
186 ret = CMD_SUCCESS;
187 goto end;
188 case OPT_TYPE:
189 /* Mandatory field */
190 tmp = poptGetOptArg(pc);
191 if (tmp == NULL) {
192 usage(stderr);
193 ret = CMD_ERROR;
194 goto end;
195 }
196 opt_ctx_type = atoi(tmp);
197 break;
198 default:
199 usage(stderr);
200 ret = CMD_UNDEFINED;
201 goto end;
202 }
203 }
204
205 ret = add_context();
206
207end:
208 return ret;
209}
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