Commit | Line | Data |
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f3ed775e DG |
1 | /* |
2 | * Copyright (c) 2011 David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
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. | |
f3ed775e DG |
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 | ||
4c462e79 | 18 | #define _GNU_SOURCE |
b9dfb167 | 19 | #include <assert.h> |
f3ed775e | 20 | #include <stdlib.h> |
679b4943 | 21 | #include <ctype.h> |
3badf2bf | 22 | #include <limits.h> |
f3ed775e | 23 | |
db758600 | 24 | #include <common/error.h> |
feb0f3e5 | 25 | #include <common/utils.h> |
f3ed775e | 26 | |
beb8c75a | 27 | #include "conf.h" |
679b4943 | 28 | #include "utils.h" |
3c9bd23c | 29 | #include "command.h" |
f3ed775e | 30 | |
b9dfb167 DG |
31 | static const char *str_kernel = "Kernel"; |
32 | static const char *str_ust = "UST"; | |
33 | static const char *str_jul = "JUL"; | |
34 | ||
f3ed775e DG |
35 | /* |
36 | * get_session_name | |
37 | * | |
38 | * Return allocated string with the session name found in the config | |
39 | * directory. | |
40 | */ | |
41 | char *get_session_name(void) | |
42 | { | |
43 | char *path, *session_name = NULL; | |
44 | ||
45 | /* Get path to config file */ | |
feb0f3e5 | 46 | path = utils_get_home_dir(); |
f3ed775e DG |
47 | if (path == NULL) { |
48 | goto error; | |
49 | } | |
50 | ||
51 | /* Get session name from config */ | |
52 | session_name = config_read_session_name(path); | |
53 | if (session_name == NULL) { | |
58a97671 | 54 | goto error; |
f3ed775e DG |
55 | } |
56 | ||
3183dbb0 | 57 | DBG2("Config file path found: %s", path); |
cd80958d | 58 | DBG("Session name found: %s", session_name); |
f3ed775e | 59 | return session_name; |
3183dbb0 DG |
60 | |
61 | error: | |
62 | return NULL; | |
f3ed775e | 63 | } |
679b4943 | 64 | |
3c9bd23c SM |
65 | /* |
66 | * list_commands | |
67 | * | |
68 | * List commands line by line. This is mostly for bash auto completion and to | |
69 | * avoid difficult parsing. | |
70 | */ | |
71 | void list_commands(struct cmd_struct *commands, FILE *ofp) | |
72 | { | |
73 | int i = 0; | |
74 | struct cmd_struct *cmd = NULL; | |
75 | ||
76 | cmd = &commands[i]; | |
77 | while (cmd->name != NULL) { | |
78 | fprintf(ofp, "%s\n", cmd->name); | |
79 | i++; | |
80 | cmd = &commands[i]; | |
81 | } | |
82 | } | |
679b4943 SM |
83 | |
84 | /* | |
85 | * list_cmd_options | |
86 | * | |
87 | * Prints a simple list of the options available to a command. This is intended | |
88 | * to be easily parsed for bash completion. | |
89 | */ | |
90 | void list_cmd_options(FILE *ofp, struct poptOption *options) | |
91 | { | |
92 | int i; | |
93 | struct poptOption *option = NULL; | |
94 | ||
95 | for (i = 0; options[i].longName != NULL; i++) { | |
96 | option = &options[i]; | |
97 | ||
98 | fprintf(ofp, "--%s\n", option->longName); | |
99 | ||
100 | if (isprint(option->shortName)) { | |
101 | fprintf(ofp, "-%c\n", option->shortName); | |
102 | } | |
103 | } | |
104 | } | |
8ce58bad MD |
105 | |
106 | /* | |
107 | * fls: returns the position of the most significant bit. | |
108 | * Returns 0 if no bit is set, else returns the position of the most | |
109 | * significant bit (from 1 to 32 on 32-bit, from 1 to 64 on 64-bit). | |
110 | */ | |
111 | #if defined(__i386) || defined(__x86_64) | |
112 | static inline | |
113 | unsigned int fls_u32(uint32_t x) | |
114 | { | |
115 | int r; | |
116 | ||
117 | asm("bsrl %1,%0\n\t" | |
118 | "jnz 1f\n\t" | |
119 | "movl $-1,%0\n\t" | |
120 | "1:\n\t" | |
121 | : "=r" (r) : "rm" (x)); | |
122 | return r + 1; | |
123 | } | |
124 | #define HAS_FLS_U32 | |
125 | #endif | |
126 | ||
127 | #if defined(__x86_64) | |
128 | static inline | |
129 | unsigned int fls_u64(uint64_t x) | |
130 | { | |
131 | long r; | |
132 | ||
133 | asm("bsrq %1,%0\n\t" | |
134 | "jnz 1f\n\t" | |
135 | "movq $-1,%0\n\t" | |
136 | "1:\n\t" | |
137 | : "=r" (r) : "rm" (x)); | |
138 | return r + 1; | |
139 | } | |
140 | #define HAS_FLS_U64 | |
141 | #endif | |
142 | ||
143 | #ifndef HAS_FLS_U64 | |
144 | static __attribute__((unused)) | |
145 | unsigned int fls_u64(uint64_t x) | |
146 | { | |
147 | unsigned int r = 64; | |
148 | ||
149 | if (!x) | |
150 | return 0; | |
151 | ||
152 | if (!(x & 0xFFFFFFFF00000000ULL)) { | |
153 | x <<= 32; | |
154 | r -= 32; | |
155 | } | |
156 | if (!(x & 0xFFFF000000000000ULL)) { | |
157 | x <<= 16; | |
158 | r -= 16; | |
159 | } | |
160 | if (!(x & 0xFF00000000000000ULL)) { | |
161 | x <<= 8; | |
162 | r -= 8; | |
163 | } | |
164 | if (!(x & 0xF000000000000000ULL)) { | |
165 | x <<= 4; | |
166 | r -= 4; | |
167 | } | |
168 | if (!(x & 0xC000000000000000ULL)) { | |
169 | x <<= 2; | |
170 | r -= 2; | |
171 | } | |
172 | if (!(x & 0x8000000000000000ULL)) { | |
173 | x <<= 1; | |
174 | r -= 1; | |
175 | } | |
176 | return r; | |
177 | } | |
178 | #endif | |
179 | ||
180 | #ifndef HAS_FLS_U32 | |
181 | static __attribute__((unused)) | |
182 | unsigned int fls_u32(uint32_t x) | |
183 | { | |
184 | unsigned int r = 32; | |
185 | ||
186 | if (!x) | |
187 | return 0; | |
188 | if (!(x & 0xFFFF0000U)) { | |
189 | x <<= 16; | |
190 | r -= 16; | |
191 | } | |
192 | if (!(x & 0xFF000000U)) { | |
193 | x <<= 8; | |
194 | r -= 8; | |
195 | } | |
196 | if (!(x & 0xF0000000U)) { | |
197 | x <<= 4; | |
198 | r -= 4; | |
199 | } | |
200 | if (!(x & 0xC0000000U)) { | |
201 | x <<= 2; | |
202 | r -= 2; | |
203 | } | |
204 | if (!(x & 0x80000000U)) { | |
205 | x <<= 1; | |
206 | r -= 1; | |
207 | } | |
208 | return r; | |
209 | } | |
210 | #endif | |
211 | ||
212 | static | |
213 | unsigned int fls_ulong(unsigned long x) | |
214 | { | |
215 | #if (CAA_BITS_PER_LONG == 32) | |
216 | return fls_u32(x); | |
217 | #else | |
218 | return fls_u64(x); | |
219 | #endif | |
220 | } | |
221 | ||
222 | /* | |
223 | * Return the minimum order for which x <= (1UL << order). | |
224 | * Return -1 if x is 0. | |
225 | */ | |
226 | int get_count_order_u32(uint32_t x) | |
227 | { | |
228 | if (!x) | |
229 | return -1; | |
230 | ||
231 | return fls_u32(x - 1); | |
232 | } | |
233 | ||
234 | /* | |
235 | * Return the minimum order for which x <= (1UL << order). | |
236 | * Return -1 if x is 0. | |
237 | */ | |
238 | int get_count_order_u64(uint64_t x) | |
239 | { | |
240 | if (!x) | |
241 | return -1; | |
242 | ||
243 | return fls_u64(x - 1); | |
244 | } | |
245 | ||
246 | /* | |
247 | * Return the minimum order for which x <= (1UL << order). | |
248 | * Return -1 if x is 0. | |
249 | */ | |
250 | int get_count_order_ulong(unsigned long x) | |
251 | { | |
252 | if (!x) | |
253 | return -1; | |
254 | ||
255 | return fls_ulong(x - 1); | |
256 | } | |
b9dfb167 DG |
257 | |
258 | const char *get_domain_str(enum lttng_domain_type domain) | |
259 | { | |
260 | const char *str_dom; | |
261 | ||
262 | switch (domain) { | |
263 | case LTTNG_DOMAIN_KERNEL: | |
264 | str_dom = str_kernel; | |
265 | break; | |
266 | case LTTNG_DOMAIN_UST: | |
267 | str_dom = str_ust; | |
268 | break; | |
269 | case LTTNG_DOMAIN_JUL: | |
270 | str_dom = str_jul; | |
271 | break; | |
272 | default: | |
273 | /* Should not have an unknown domain or else define it. */ | |
274 | assert(0); | |
275 | } | |
276 | ||
277 | return str_dom; | |
278 | } |