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d4a2a84a DG |
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 <errno.h> | |
d4a2a84a | 21 | #include <stdlib.h> |
baa0e4a9 | 22 | #include <stdio.h> |
1657e9bb | 23 | #include <string.h> |
baa0e4a9 DG |
24 | #include <unistd.h> |
25 | ||
62d3069f | 26 | #include "libustctl.h" |
471d1693 | 27 | #include "liblttsessiondcomm.h" |
d4a2a84a | 28 | #include "lttngerr.h" |
baa0e4a9 | 29 | #include "ust-ctl.h" |
471d1693 | 30 | |
b088a581 | 31 | #ifdef DISABLED |
d4a2a84a DG |
32 | /* |
33 | * find_session_ust_trace_by_pid | |
34 | * | |
35 | * Iterate over the session ust_traces and | |
36 | * return a pointer or NULL if not found. | |
37 | */ | |
471d1693 DG |
38 | static struct ltt_ust_trace *find_session_ust_trace_by_pid( |
39 | struct ltt_session *session, pid_t pid) | |
d4a2a84a DG |
40 | { |
41 | struct ltt_ust_trace *iter; | |
42 | ||
43 | cds_list_for_each_entry(iter, &session->ust_traces, list) { | |
44 | if (iter->pid == pid) { | |
45 | /* Found */ | |
46 | return iter; | |
47 | } | |
48 | } | |
49 | ||
50 | return NULL; | |
51 | } | |
52 | ||
1657e9bb DG |
53 | /* |
54 | * get_trace_count_per_session | |
55 | * | |
56 | * Return the total count of traces (ust and kernel) | |
57 | * for the specified session. | |
58 | */ | |
59 | int get_trace_count_per_session(struct ltt_session *session) | |
60 | { | |
99309957 | 61 | return session->ust_trace_count; |
1657e9bb DG |
62 | } |
63 | ||
64 | /* | |
65 | * get_traces_per_session | |
66 | * | |
67 | * Fill the lttng_trace array of all the | |
68 | * available trace of the session. | |
69 | */ | |
f3ed775e | 70 | /* |
1657e9bb DG |
71 | void get_traces_per_session(struct ltt_session *session, struct lttng_trace *traces) |
72 | { | |
73 | int i = 0; | |
74 | struct ltt_ust_trace *ust_iter; | |
1657e9bb DG |
75 | struct lttng_trace trace; |
76 | ||
77 | DBG("Getting userspace traces for session %s", session->name); | |
78 | ||
1657e9bb DG |
79 | cds_list_for_each_entry(ust_iter, &session->ust_traces, list) { |
80 | trace.type = USERSPACE; | |
81 | trace.pid = ust_iter->pid; | |
82 | strncpy(trace.name, ust_iter->name, sizeof(trace.name)); | |
83 | trace.name[sizeof(trace.name) - 1] = '\0'; | |
84 | memcpy(&traces[i], &trace, sizeof(trace)); | |
85 | memset(&trace, 0, sizeof(trace)); | |
86 | i++; | |
87 | } | |
88 | ||
89 | DBG("Getting kernel traces for session %s", session->name); | |
90 | ||
20fe2104 | 91 | if (session->kern_session_count > 0) { |
1657e9bb | 92 | trace.type = KERNEL; |
20fe2104 | 93 | strncpy(trace.name, "kernel", 6); |
1657e9bb | 94 | memcpy(&traces[i], &trace, sizeof(trace)); |
1657e9bb DG |
95 | } |
96 | } | |
f3ed775e | 97 | */ |
471d1693 DG |
98 | |
99 | /* | |
100 | * ust_create_trace | |
101 | * | |
102 | * Create an userspace trace using pid. | |
103 | * This trace is then appended to the current session | |
104 | * ust trace list. | |
105 | */ | |
5461b305 | 106 | int ust_create_trace(struct command_ctx *cmd_ctx) |
471d1693 DG |
107 | { |
108 | int ret; | |
109 | struct ltt_ust_trace *trace; | |
110 | ||
5461b305 | 111 | DBG("Creating trace for pid %d", cmd_ctx->lsm->pid); |
471d1693 DG |
112 | |
113 | trace = malloc(sizeof(struct ltt_ust_trace)); | |
114 | if (trace == NULL) { | |
115 | perror("malloc"); | |
116 | ret = -1; | |
117 | goto error; | |
118 | } | |
119 | ||
120 | /* Init */ | |
5461b305 | 121 | trace->pid = cmd_ctx->lsm->pid; |
471d1693 DG |
122 | trace->shmid = 0; |
123 | /* NOTE: to be removed. Trace name will no longer be | |
124 | * required for LTTng userspace tracer. For now, we set it | |
125 | * to 'auto' for API compliance. | |
126 | */ | |
127 | snprintf(trace->name, 5, "auto"); | |
128 | ||
5461b305 | 129 | ret = ustctl_create_trace(cmd_ctx->ust_sock, trace->name); |
471d1693 DG |
130 | if (ret < 0) { |
131 | ret = LTTCOMM_CREATE_FAIL; | |
a55dd136 | 132 | goto error_create; |
471d1693 DG |
133 | } |
134 | ||
135 | /* Check if current session is valid */ | |
5461b305 DG |
136 | if (cmd_ctx->session) { |
137 | cds_list_add(&trace->list, &cmd_ctx->session->ust_traces); | |
138 | cmd_ctx->session->ust_trace_count++; | |
471d1693 | 139 | } |
a55dd136 | 140 | |
5461b305 | 141 | return LTTCOMM_OK; |
471d1693 | 142 | |
5e16da05 MD |
143 | error_create: |
144 | free(trace); | |
471d1693 DG |
145 | error: |
146 | return ret; | |
147 | } | |
148 | ||
149 | /* | |
150 | * ust_start_trace | |
151 | * | |
152 | * Start a trace. This trace, identified by the pid, must be | |
153 | * in the current session ust_traces list. | |
154 | */ | |
5461b305 | 155 | int ust_start_trace(struct command_ctx *cmd_ctx) |
471d1693 DG |
156 | { |
157 | int ret; | |
158 | struct ltt_ust_trace *trace; | |
159 | ||
5461b305 | 160 | DBG("Starting trace for pid %d", cmd_ctx->lsm->pid); |
471d1693 | 161 | |
5461b305 | 162 | trace = find_session_ust_trace_by_pid(cmd_ctx->session, cmd_ctx->lsm->pid); |
471d1693 DG |
163 | if (trace == NULL) { |
164 | ret = LTTCOMM_NO_TRACE; | |
165 | goto error; | |
166 | } | |
167 | ||
5461b305 | 168 | ret = ustctl_start_trace(cmd_ctx->ust_sock, "auto"); |
471d1693 DG |
169 | if (ret < 0) { |
170 | ret = LTTCOMM_START_FAIL; | |
171 | goto error; | |
172 | } | |
173 | ||
5461b305 DG |
174 | ret = LTTCOMM_OK; |
175 | ||
471d1693 DG |
176 | error: |
177 | return ret; | |
178 | } | |
179 | ||
180 | /* | |
181 | * ust_stop_trace | |
182 | * | |
183 | * Stop a trace. This trace, identified by the pid, must be | |
184 | * in the current session ust_traces list. | |
185 | */ | |
5461b305 | 186 | int ust_stop_trace(struct command_ctx *cmd_ctx) |
471d1693 DG |
187 | { |
188 | int ret; | |
189 | struct ltt_ust_trace *trace; | |
190 | ||
5461b305 | 191 | DBG("Stopping trace for pid %d", cmd_ctx->lsm->pid); |
471d1693 | 192 | |
5461b305 | 193 | trace = find_session_ust_trace_by_pid(cmd_ctx->session, cmd_ctx->lsm->pid); |
471d1693 DG |
194 | if (trace == NULL) { |
195 | ret = LTTCOMM_NO_TRACE; | |
196 | goto error; | |
197 | } | |
198 | ||
5461b305 | 199 | ret = ustctl_stop_trace(cmd_ctx->ust_sock, trace->name); |
471d1693 DG |
200 | if (ret < 0) { |
201 | ret = LTTCOMM_STOP_FAIL; | |
202 | goto error; | |
203 | } | |
204 | ||
5461b305 DG |
205 | ret = LTTCOMM_OK; |
206 | ||
471d1693 DG |
207 | error: |
208 | return ret; | |
209 | } | |
b088a581 | 210 | #endif |
471d1693 | 211 |