cde0cc48c5ac2a3cf08fcf010ddf6734135a573b
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
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.
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.
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.
25 #include <sys/types.h>
32 static char *opt_event_list
;
33 static int opt_event_type
;
34 static char *opt_kernel
;
35 static char *opt_cmd_name
;
36 static int opt_pid_all
;
37 static int opt_userspace
;
38 static int opt_enable_all
;
40 static char *opt_kprobe_addr
;
41 static char *opt_function_symbol
;
42 static char *opt_channel_name
;
53 static struct poptOption long_options
[] = {
54 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
55 {"help", 'h', POPT_ARG_NONE
, 0, OPT_HELP
, 0, 0},
56 {"all-events", 'a', POPT_ARG_VAL
, &opt_enable_all
, 1, 0, 0},
57 {"channel", 'c', POPT_ARG_STRING
, &opt_channel_name
, 0, 0, 0},
58 {"kernel", 'k', POPT_ARG_VAL
, &opt_kernel
, 1, 0, 0},
59 {"userspace", 'u', POPT_ARG_STRING
| POPT_ARGFLAG_OPTIONAL
, 0, OPT_USERSPACE
, 0, 0},
60 {"all", 0, POPT_ARG_VAL
, &opt_pid_all
, 1, 0, 0},
61 {"pid", 'p', POPT_ARG_INT
, &opt_pid
, 0, 0, 0},
62 {"tracepoint", 0, POPT_ARG_NONE
, 0, OPT_TRACEPOINT
, 0, 0},
63 {"marker", 0, POPT_ARG_NONE
, 0, OPT_MARKER
, 0, 0},
64 {"kprobe", 0, POPT_ARG_STRING
, 0, OPT_KPROBE
, 0, 0},
65 {"function", 0, POPT_ARG_STRING
, 0, OPT_FUNCTION
, 0, 0},
72 static void usage(FILE *ofp
)
74 fprintf(ofp
, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
76 fprintf(ofp
, " -h, --help Show this help\n");
77 fprintf(ofp
, " -c, --channel Apply on this channel\n");
78 fprintf(ofp
, " -a, --all-events Enable all tracepoints\n");
79 fprintf(ofp
, " -k, --kernel Apply for the kernel tracer\n");
80 fprintf(ofp
, " -u, --userspace [CMD] Apply for the user-space tracer\n");
81 fprintf(ofp
, " --all If -u, apply on all traceable apps\n");
82 fprintf(ofp
, " -p, --pid PID If -u, apply on a specific PID\n");
84 fprintf(ofp
, "Event options:\n");
85 fprintf(ofp
, " --tracepoint Tracepoint event (default)\n");
86 fprintf(ofp
, " --kprobe ADDR Kernel Kprobe\n");
87 fprintf(ofp
, " --function SYMBOL Function tracer event\n");
88 fprintf(ofp
, " --marker User-space marker (deprecated)\n");
95 * Enabling event using the lttng API.
97 static int enable_events(void)
99 int err
, ret
= CMD_SUCCESS
;
100 char *event_name
, *channel_name
;
101 struct lttng_event ev
;
103 if (set_session_name() < 0) {
108 if (opt_channel_name
== NULL
) {
109 err
= asprintf(&channel_name
, DEFAULT_CHANNEL_NAME
);
115 channel_name
= opt_channel_name
;
118 if (opt_enable_all
) {
120 ret
= lttng_kernel_enable_event(NULL
, channel_name
);
124 /* TODO: User-space tracer */
127 /* Strip event list */
128 event_name
= strtok(opt_event_list
, ",");
129 while (event_name
!= NULL
) {
130 /* Kernel tracer action */
132 DBG("Enabling kernel event %s for channel %s",
133 event_name
, channel_name
);
134 /* Copy name and type of the event */
135 strncpy(ev
.name
, event_name
, LTTNG_SYMBOL_NAME_LEN
);
136 ev
.type
= opt_event_type
;
138 switch (opt_event_type
) {
139 case LTTNG_EVENT_TRACEPOINTS
:
140 ret
= lttng_kernel_enable_event(&ev
, channel_name
);
142 case LTTNG_EVENT_KPROBES
:
143 /* FIXME: check addr format */
144 ev
.attr
.kprobe
.addr
= atoll(opt_kprobe_addr
);
145 ret
= lttng_kernel_enable_event(&ev
, channel_name
);
147 case LTTNG_EVENT_FUNCTION
:
148 strncpy(ev
.attr
.ftrace
.symbol_name
, opt_function_symbol
, LTTNG_SYMBOL_NAME_LEN
);
149 ret
= lttng_kernel_enable_event(&ev
, channel_name
);
152 ret
= CMD_NOT_IMPLEMENTED
;
157 MSG("Kernel event %s created in channel %s", event_name
, channel_name
);
159 } else if (opt_userspace
) { /* User-space tracer action */
161 * TODO: Waiting on lttng UST 2.0
164 } else if (opt_pid
!= 0) {
166 ret
= CMD_NOT_IMPLEMENTED
;
169 ERR("Please specify a tracer (kernel or user-space)");
174 event_name
= strtok(NULL
, ",");
184 * Add event to trace session
186 int cmd_enable_events(int argc
, const char **argv
)
189 static poptContext pc
;
191 pc
= poptGetContext(NULL
, argc
, argv
, long_options
, 0);
192 poptReadDefaultConfig(pc
, 0);
194 /* Default event type */
195 opt_event_type
= LTTNG_KERNEL_TRACEPOINTS
;
197 while ((opt
= poptGetNextOpt(pc
)) != -1) {
205 opt_cmd_name
= poptGetOptArg(pc
);
208 opt_event_type
= LTTNG_EVENT_TRACEPOINTS
;
211 ret
= CMD_NOT_IMPLEMENTED
;
214 opt_event_type
= LTTNG_EVENT_KPROBES
;
215 opt_kprobe_addr
= poptGetOptArg(pc
);
218 opt_event_type
= LTTNG_EVENT_FUNCTION
;
219 opt_function_symbol
= poptGetOptArg(pc
);
228 opt_event_list
= (char*) poptGetArg(pc
);
229 if (opt_event_list
== NULL
&& opt_enable_all
== 0) {
230 ERR("Missing event name(s).\n");
236 ret
= enable_events();
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