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d0254c7c MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * Copyright (C) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * | |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
d0254c7c MD |
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 | * | |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
d0254c7c MD |
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 | #include <inttypes.h> | |
28 | #include <ctype.h> | |
29 | ||
c399183f | 30 | #include "../command.h" |
d0254c7c MD |
31 | |
32 | static int opt_event_type; | |
33 | static char *opt_kernel; | |
d0254c7c | 34 | static int opt_userspace; |
d78d6610 DG |
35 | #if 0 |
36 | /* Not implemented yet */ | |
eeac7d46 | 37 | static char *opt_cmd_name; |
d0254c7c | 38 | static pid_t opt_pid; |
d78d6610 | 39 | #endif |
d0254c7c MD |
40 | |
41 | enum { | |
42 | OPT_HELP = 1, | |
d0254c7c MD |
43 | OPT_TRACEPOINT, |
44 | OPT_MARKER, | |
45 | OPT_PROBE, | |
46 | OPT_FUNCTION, | |
47 | OPT_FUNCTION_ENTRY, | |
a54bd42d | 48 | OPT_SYSCALL, |
eeac7d46 | 49 | OPT_USERSPACE, |
679b4943 | 50 | OPT_LIST_OPTIONS, |
d0254c7c MD |
51 | }; |
52 | ||
cd80958d DG |
53 | static struct lttng_handle *handle; |
54 | ||
d0254c7c MD |
55 | static struct poptOption long_options[] = { |
56 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
57 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
58 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, | |
d78d6610 DG |
59 | #if 0 |
60 | /* Not implemented yet */ | |
6caa2bcc | 61 | {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0}, |
d0254c7c MD |
62 | {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, |
63 | {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0}, | |
64 | {"marker", 0, POPT_ARG_NONE, 0, OPT_MARKER, 0, 0}, | |
65 | {"probe", 0, POPT_ARG_NONE, 0, OPT_PROBE, 0, 0}, | |
4466912f DG |
66 | #else |
67 | {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0}, | |
d0254c7c | 68 | {"function", 0, POPT_ARG_NONE, 0, OPT_FUNCTION, 0, 0}, |
4466912f | 69 | #endif |
b213d387 MD |
70 | #if 0 |
71 | /* | |
72 | * Removed from options to discourage its use. Not in kernel | |
73 | * tracer anymore. | |
74 | */ | |
d0254c7c | 75 | {"function:entry", 0, POPT_ARG_NONE, 0, OPT_FUNCTION_ENTRY, 0, 0}, |
b213d387 | 76 | #endif |
a54bd42d | 77 | {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0}, |
679b4943 | 78 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
d0254c7c MD |
79 | {0, 0, 0, 0, 0, 0, 0} |
80 | }; | |
81 | ||
82 | /* | |
83 | * usage | |
84 | */ | |
85 | static void usage(FILE *ofp) | |
86 | { | |
32a6298d | 87 | fprintf(ofp, "usage: lttng calibrate [-k|-u] [OPTIONS]\n"); |
d0254c7c | 88 | fprintf(ofp, "\n"); |
32a6298d | 89 | fprintf(ofp, "Options:\n"); |
d0254c7c | 90 | fprintf(ofp, " -h, --help Show this help\n"); |
679b4943 | 91 | fprintf(ofp, " --list-options Simple listing of options\n"); |
af87c45a | 92 | fprintf(ofp, " -k, --kernel Apply to the kernel tracer\n"); |
af87c45a | 93 | fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n"); |
d0254c7c MD |
94 | fprintf(ofp, "\n"); |
95 | fprintf(ofp, "Calibrate options:\n"); | |
32a6298d | 96 | fprintf(ofp, " --function Dynamic function entry/return probe (default)\n"); |
4466912f | 97 | #if 0 |
d0254c7c MD |
98 | fprintf(ofp, " --tracepoint Tracepoint event (default)\n"); |
99 | fprintf(ofp, " --probe\n"); | |
100 | fprintf(ofp, " Dynamic probe.\n"); | |
b213d387 | 101 | #if 0 |
d0254c7c MD |
102 | fprintf(ofp, " --function:entry symbol\n"); |
103 | fprintf(ofp, " Function tracer event\n"); | |
b213d387 | 104 | #endif |
a54bd42d | 105 | fprintf(ofp, " --syscall System call eventl\n"); |
d0254c7c | 106 | fprintf(ofp, " --marker User-space marker (deprecated)\n"); |
4466912f | 107 | #endif |
d0254c7c MD |
108 | fprintf(ofp, "\n"); |
109 | } | |
110 | ||
111 | /* | |
af87c45a | 112 | * Calibrate LTTng. |
d0254c7c | 113 | * |
af87c45a | 114 | * Returns a CMD_* error. |
d0254c7c MD |
115 | */ |
116 | static int calibrate_lttng(void) | |
117 | { | |
118 | int ret = CMD_SUCCESS; | |
119 | struct lttng_domain dom; | |
120 | struct lttng_calibrate calibrate; | |
121 | ||
441c16a7 MD |
122 | memset(&dom, 0, sizeof(dom)); |
123 | memset(&calibrate, 0, sizeof(calibrate)); | |
124 | ||
d0254c7c MD |
125 | /* Create lttng domain */ |
126 | if (opt_kernel) { | |
127 | dom.type = LTTNG_DOMAIN_KERNEL; | |
4466912f DG |
128 | } else if (opt_userspace) { |
129 | dom.type = LTTNG_DOMAIN_UST; | |
130 | } else { | |
131 | ERR("Please specify a tracer (-k/--kernel or -u/--userspace)"); | |
d16c1a4c | 132 | ret = CMD_ERROR; |
4466912f | 133 | goto error; |
d0254c7c MD |
134 | } |
135 | ||
cd80958d DG |
136 | handle = lttng_create_handle(NULL, &dom); |
137 | if (handle == NULL) { | |
af87c45a | 138 | ret = CMD_ERROR; |
4466912f | 139 | goto error; |
cd80958d DG |
140 | } |
141 | ||
4466912f DG |
142 | switch (opt_event_type) { |
143 | case LTTNG_EVENT_TRACEPOINT: | |
144 | DBG("Calibrating kernel tracepoints"); | |
145 | break; | |
146 | case LTTNG_EVENT_PROBE: | |
147 | DBG("Calibrating kernel probes"); | |
148 | break; | |
149 | case LTTNG_EVENT_FUNCTION: | |
150 | DBG("Calibrating kernel functions"); | |
151 | calibrate.type = LTTNG_CALIBRATE_FUNCTION; | |
152 | ret = lttng_calibrate(handle, &calibrate); | |
153 | if (ret < 0) { | |
8f3f773f | 154 | ERR("%s", lttng_strerror(ret)); |
4466912f | 155 | goto error; |
d0254c7c | 156 | } |
4466912f DG |
157 | MSG("%s calibration done", opt_kernel ? "Kernel" : "UST"); |
158 | break; | |
159 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
160 | DBG("Calibrating kernel function entry"); | |
161 | break; | |
162 | case LTTNG_EVENT_SYSCALL: | |
163 | DBG("Calibrating kernel syscall"); | |
164 | break; | |
165 | default: | |
1ab1ea0b | 166 | ret = CMD_UNDEFINED; |
4466912f | 167 | goto error; |
d0254c7c | 168 | } |
4466912f | 169 | |
af87c45a DG |
170 | ret = CMD_SUCCESS; |
171 | ||
4466912f | 172 | error: |
cd80958d DG |
173 | lttng_destroy_handle(handle); |
174 | ||
d0254c7c MD |
175 | return ret; |
176 | } | |
177 | ||
178 | /* | |
af87c45a | 179 | * Calibrate LTTng tracer. |
1c8d13c8 TD |
180 | * |
181 | * Returns a CMD_* error. | |
d0254c7c MD |
182 | */ |
183 | int cmd_calibrate(int argc, const char **argv) | |
184 | { | |
ca1c3607 | 185 | int opt, ret = CMD_SUCCESS; |
d0254c7c MD |
186 | static poptContext pc; |
187 | ||
188 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
189 | poptReadDefaultConfig(pc, 0); | |
190 | ||
191 | /* Default event type */ | |
4466912f | 192 | opt_event_type = LTTNG_EVENT_FUNCTION; |
d0254c7c MD |
193 | |
194 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
195 | switch (opt) { | |
196 | case OPT_HELP: | |
af87c45a | 197 | usage(stdout); |
d0254c7c | 198 | goto end; |
d0254c7c | 199 | case OPT_TRACEPOINT: |
1ab1ea0b | 200 | ret = CMD_UNDEFINED; |
4466912f | 201 | goto end; |
d0254c7c | 202 | case OPT_MARKER: |
1ab1ea0b | 203 | ret = CMD_UNDEFINED; |
d0254c7c MD |
204 | goto end; |
205 | case OPT_PROBE: | |
1ab1ea0b | 206 | ret = CMD_UNDEFINED; |
d0254c7c MD |
207 | break; |
208 | case OPT_FUNCTION: | |
209 | opt_event_type = LTTNG_EVENT_FUNCTION; | |
210 | break; | |
211 | case OPT_FUNCTION_ENTRY: | |
1ab1ea0b | 212 | ret = CMD_UNDEFINED; |
4466912f | 213 | goto end; |
a54bd42d | 214 | case OPT_SYSCALL: |
1ab1ea0b | 215 | ret = CMD_UNDEFINED; |
4466912f | 216 | goto end; |
eeac7d46 MD |
217 | case OPT_USERSPACE: |
218 | opt_userspace = 1; | |
eeac7d46 | 219 | break; |
679b4943 SM |
220 | case OPT_LIST_OPTIONS: |
221 | list_cmd_options(stdout, long_options); | |
679b4943 | 222 | goto end; |
d0254c7c MD |
223 | default: |
224 | usage(stderr); | |
225 | ret = CMD_UNDEFINED; | |
226 | goto end; | |
227 | } | |
228 | } | |
229 | ||
230 | ret = calibrate_lttng(); | |
231 | ||
232 | end: | |
ca1c3607 | 233 | poptFreeContext(pc); |
d0254c7c MD |
234 | return ret; |
235 | } |