1 /* 2 * Copyright (C) 2005 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 // 18 // C/C++ logging functions. See the logging documentation for API details. 19 // 20 // We'd like these to be available from C code (in case we import some from 21 // somewhere), so this has a C interface. 22 // 23 // The output will be correct when the log file is shared between multiple 24 // threads and/or multiple processes so long as the operating system 25 // supports O_APPEND. These calls have mutex-protected data structures 26 // and so are NOT reentrant. Do not use LOG in a signal handler. 27 // 28 #ifndef _LIBS_CUTILS_LOG_H 29 #define _LIBS_CUTILS_LOG_H 30 31 #include <stdio.h> 32 #include <time.h> 33 #include <sys/types.h> 34 #include <unistd.h> 35 #ifdef HAVE_PTHREADS 36 #include <pthread.h> 37 #endif 38 #include <stdarg.h> 39 40 #include <cutils/uio.h> 41 #include <cutils/logd.h> 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 // --------------------------------------------------------------------- 48 49 /* 50 * Normally we strip LOGV (VERBOSE messages) from release builds. 51 * You can modify this (for example with "#define LOG_NDEBUG 0" 52 * at the top of your source file) to change that behavior. 53 */ 54 #ifndef LOG_NDEBUG 55 #ifdef NDEBUG 56 #define LOG_NDEBUG 1 57 #else 58 #define LOG_NDEBUG 0 59 #endif 60 #endif 61 62 /* 63 * This is the local tag used for the following simplified 64 * logging macros. You can change this preprocessor definition 65 * before using the other macros to change the tag. 66 */ 67 #ifndef LOG_TAG 68 #define LOG_TAG NULL 69 #endif 70 71 // --------------------------------------------------------------------- 72 73 /* 74 * Simplified macro to send a verbose log message using the current LOG_TAG. 75 */ 76 #ifndef LOGV 77 #if LOG_NDEBUG 78 #define LOGV(...) ((void)0) 79 #else 80 #define LOGV(...) ((void)LOG(LOG_VERBOSE, LOG_TAG, __VA_ARGS__)) 81 #endif 82 #endif 83 84 #define CONDITION(cond) (__builtin_expect((cond)!=0, 0)) 85 86 #ifndef LOGV_IF 87 #if LOG_NDEBUG 88 #define LOGV_IF(cond, ...) ((void)0) 89 #else 90 #define LOGV_IF(cond, ...) \ 91 ( (CONDITION(cond)) \ 92 ? ((void)LOG(LOG_VERBOSE, LOG_TAG, __VA_ARGS__)) \ 93 : (void)0 ) 94 #endif 95 #endif 96 97 /* 98 * Simplified macro to send a debug log message using the current LOG_TAG. 99 */ 100 #ifndef LOGD 101 #define LOGD(...) ((void)LOG(LOG_DEBUG, LOG_TAG, __VA_ARGS__)) 102 #endif 103 104 #ifndef LOGD_IF 105 #define LOGD_IF(cond, ...) \ 106 ( (CONDITION(cond)) \ 107 ? ((void)LOG(LOG_DEBUG, LOG_TAG, __VA_ARGS__)) \ 108 : (void)0 ) 109 #endif 110 111 /* 112 * Simplified macro to send an info log message using the current LOG_TAG. 113 */ 114 #ifndef LOGI 115 #define LOGI(...) ((void)LOG(LOG_INFO, LOG_TAG, __VA_ARGS__)) 116 #endif 117 118 #ifndef LOGI_IF 119 #define LOGI_IF(cond, ...) \ 120 ( (CONDITION(cond)) \ 121 ? ((void)LOG(LOG_INFO, LOG_TAG, __VA_ARGS__)) \ 122 : (void)0 ) 123 #endif 124 125 /* 126 * Simplified macro to send a warning log message using the current LOG_TAG. 127 */ 128 #ifndef LOGW 129 #define LOGW(...) ((void)LOG(LOG_WARN, LOG_TAG, __VA_ARGS__)) 130 #endif 131 132 #ifndef LOGW_IF 133 #define LOGW_IF(cond, ...) \ 134 ( (CONDITION(cond)) \ 135 ? ((void)LOG(LOG_WARN, LOG_TAG, __VA_ARGS__)) \ 136 : (void)0 ) 137 #endif 138 139 /* 140 * Simplified macro to send an error log message using the current LOG_TAG. 141 */ 142 #ifndef LOGE 143 #define LOGE(...) ((void)LOG(LOG_ERROR, LOG_TAG, __VA_ARGS__)) 144 #endif 145 146 #ifndef LOGE_IF 147 #define LOGE_IF(cond, ...) \ 148 ( (CONDITION(cond)) \ 149 ? ((void)LOG(LOG_ERROR, LOG_TAG, __VA_ARGS__)) \ 150 : (void)0 ) 151 #endif 152 153 // --------------------------------------------------------------------- 154 155 /* 156 * Conditional based on whether the current LOG_TAG is enabled at 157 * verbose priority. 158 */ 159 #ifndef IF_LOGV 160 #if LOG_NDEBUG 161 #define IF_LOGV() if (false) 162 #else 163 #define IF_LOGV() IF_LOG(LOG_VERBOSE, LOG_TAG) 164 #endif 165 #endif 166 167 /* 168 * Conditional based on whether the current LOG_TAG is enabled at 169 * debug priority. 170 */ 171 #ifndef IF_LOGD 172 #define IF_LOGD() IF_LOG(LOG_DEBUG, LOG_TAG) 173 #endif 174 175 /* 176 * Conditional based on whether the current LOG_TAG is enabled at 177 * info priority. 178 */ 179 #ifndef IF_LOGI 180 #define IF_LOGI() IF_LOG(LOG_INFO, LOG_TAG) 181 #endif 182 183 /* 184 * Conditional based on whether the current LOG_TAG is enabled at 185 * warn priority. 186 */ 187 #ifndef IF_LOGW 188 #define IF_LOGW() IF_LOG(LOG_WARN, LOG_TAG) 189 #endif 190 191 /* 192 * Conditional based on whether the current LOG_TAG is enabled at 193 * error priority. 194 */ 195 #ifndef IF_LOGE 196 #define IF_LOGE() IF_LOG(LOG_ERROR, LOG_TAG) 197 #endif 198 199 200 // --------------------------------------------------------------------- 201 202 /* 203 * Simplified macro to send a verbose system log message using the current LOG_TAG. 204 */ 205 #ifndef SLOGV 206 #if LOG_NDEBUG 207 #define SLOGV(...) ((void)0) 208 #else 209 #define SLOGV(...) ((void)__android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_VERBOSE, LOG_TAG, __VA_ARGS__)) 210 #endif 211 #endif 212 213 #define CONDITION(cond) (__builtin_expect((cond)!=0, 0)) 214 215 #ifndef SLOGV_IF 216 #if LOG_NDEBUG 217 #define SLOGV_IF(cond, ...) ((void)0) 218 #else 219 #define SLOGV_IF(cond, ...) \ 220 ( (CONDITION(cond)) \ 221 ? ((void)__android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_VERBOSE, LOG_TAG, __VA_ARGS__)) \ 222 : (void)0 ) 223 #endif 224 #endif 225 226 /* 227 * Simplified macro to send a debug system log message using the current LOG_TAG. 228 */ 229 #ifndef SLOGD 230 #define SLOGD(...) ((void)__android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__)) 231 #endif 232 233 #ifndef SLOGD_IF 234 #define SLOGD_IF(cond, ...) \ 235 ( (CONDITION(cond)) \ 236 ? ((void)__android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__)) \ 237 : (void)0 ) 238 #endif 239 240 /* 241 * Simplified macro to send an info system log message using the current LOG_TAG. 242 */ 243 #ifndef SLOGI 244 #define SLOGI(...) ((void)__android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)) 245 #endif 246 247 #ifndef SLOGI_IF 248 #define SLOGI_IF(cond, ...) \ 249 ( (CONDITION(cond)) \ 250 ? ((void)__android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)) \ 251 : (void)0 ) 252 #endif 253 254 /* 255 * Simplified macro to send a warning system log message using the current LOG_TAG. 256 */ 257 #ifndef SLOGW 258 #define SLOGW(...) ((void)__android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_WARN, LOG_TAG, __VA_ARGS__)) 259 #endif 260 261 #ifndef SLOGW_IF 262 #define SLOGW_IF(cond, ...) \ 263 ( (CONDITION(cond)) \ 264 ? ((void)__android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_WARN, LOG_TAG, __VA_ARGS__)) \ 265 : (void)0 ) 266 #endif 267 268 /* 269 * Simplified macro to send an error system log message using the current LOG_TAG. 270 */ 271 #ifndef SLOGE 272 #define SLOGE(...) ((void)__android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)) 273 #endif 274 275 #ifndef SLOGE_IF 276 #define SLOGE_IF(cond, ...) \ 277 ( (CONDITION(cond)) \ 278 ? ((void)__android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)) \ 279 : (void)0 ) 280 #endif 281 282 283 284 // --------------------------------------------------------------------- 285 286 /* 287 * Log a fatal error. If the given condition fails, this stops program 288 * execution like a normal assertion, but also generating the given message. 289 * It is NOT stripped from release builds. Note that the condition test 290 * is -inverted- from the normal assert() semantics. 291 */ 292 #ifndef LOG_ALWAYS_FATAL_IF 293 #define LOG_ALWAYS_FATAL_IF(cond, ...) \ 294 ( (CONDITION(cond)) \ 295 ? ((void)android_printAssert(#cond, LOG_TAG, ## __VA_ARGS__)) \ 296 : (void)0 ) 297 #endif 298 299 #ifndef LOG_ALWAYS_FATAL 300 #define LOG_ALWAYS_FATAL(...) \ 301 ( ((void)android_printAssert(NULL, LOG_TAG, ## __VA_ARGS__)) ) 302 #endif 303 304 /* 305 * Versions of LOG_ALWAYS_FATAL_IF and LOG_ALWAYS_FATAL that 306 * are stripped out of release builds. 307 */ 308 #if LOG_NDEBUG 309 310 #ifndef LOG_FATAL_IF 311 #define LOG_FATAL_IF(cond, ...) ((void)0) 312 #endif 313 #ifndef LOG_FATAL 314 #define LOG_FATAL(...) ((void)0) 315 #endif 316 317 #else 318 319 #ifndef LOG_FATAL_IF 320 #define LOG_FATAL_IF(cond, ...) LOG_ALWAYS_FATAL_IF(cond, ## __VA_ARGS__) 321 #endif 322 #ifndef LOG_FATAL 323 #define LOG_FATAL(...) LOG_ALWAYS_FATAL(__VA_ARGS__) 324 #endif 325 326 #endif 327 328 /* 329 * Assertion that generates a log message when the assertion fails. 330 * Stripped out of release builds. Uses the current LOG_TAG. 331 */ 332 #ifndef LOG_ASSERT 333 #define LOG_ASSERT(cond, ...) LOG_FATAL_IF(!(cond), ## __VA_ARGS__) 334 //#define LOG_ASSERT(cond) LOG_FATAL_IF(!(cond), "Assertion failed: " #cond) 335 #endif 336 337 // --------------------------------------------------------------------- 338 339 /* 340 * Basic log message macro. 341 * 342 * Example: 343 * LOG(LOG_WARN, NULL, "Failed with error %d", errno); 344 * 345 * The second argument may be NULL or "" to indicate the "global" tag. 346 */ 347 #ifndef LOG 348 #define LOG(priority, tag, ...) \ 349 LOG_PRI(ANDROID_##priority, tag, __VA_ARGS__) 350 #endif 351 352 /* 353 * Log macro that allows you to specify a number for the priority. 354 */ 355 #ifndef LOG_PRI 356 #define LOG_PRI(priority, tag, ...) \ 357 android_printLog(priority, tag, __VA_ARGS__) 358 #endif 359 360 /* 361 * Log macro that allows you to pass in a varargs ("args" is a va_list). 362 */ 363 #ifndef LOG_PRI_VA 364 #define LOG_PRI_VA(priority, tag, fmt, args) \ 365 android_vprintLog(priority, NULL, tag, fmt, args) 366 #endif 367 368 /* 369 * Conditional given a desired logging priority and tag. 370 */ 371 #ifndef IF_LOG 372 #define IF_LOG(priority, tag) \ 373 if (android_testLog(ANDROID_##priority, tag)) 374 #endif 375 376 // --------------------------------------------------------------------- 377 378 /* 379 * Event logging. 380 */ 381 382 /* 383 * Event log entry types. These must match up with the declarations in 384 * java/android/android/util/EventLog.java. 385 */ 386 typedef enum { 387 EVENT_TYPE_INT = 0, 388 EVENT_TYPE_LONG = 1, 389 EVENT_TYPE_STRING = 2, 390 EVENT_TYPE_LIST = 3, 391 } AndroidEventLogType; 392 393 394 #ifndef LOG_EVENT_INT 395 #define LOG_EVENT_INT(_tag, _value) { \ 396 int intBuf = _value; \ 397 (void) android_btWriteLog(_tag, EVENT_TYPE_INT, &intBuf, \ 398 sizeof(intBuf)); \ 399 } 400 #endif 401 #ifndef LOG_EVENT_LONG 402 #define LOG_EVENT_LONG(_tag, _value) { \ 403 long long longBuf = _value; \ 404 (void) android_btWriteLog(_tag, EVENT_TYPE_LONG, &longBuf, \ 405 sizeof(longBuf)); \ 406 } 407 #endif 408 #ifndef LOG_EVENT_STRING 409 #define LOG_EVENT_STRING(_tag, _value) \ 410 ((void) 0) /* not implemented -- must combine len with string */ 411 #endif 412 /* TODO: something for LIST */ 413 414 /* 415 * =========================================================================== 416 * 417 * The stuff in the rest of this file should not be used directly. 418 */ 419 420 #define android_printLog(prio, tag, fmt...) \ 421 __android_log_print(prio, tag, fmt) 422 423 #define android_vprintLog(prio, cond, tag, fmt...) \ 424 __android_log_vprint(prio, tag, fmt) 425 426 /* XXX Macros to work around syntax errors in places where format string 427 * arg is not passed to LOG_ASSERT, LOG_ALWAYS_FATAL or LOG_ALWAYS_FATAL_IF 428 * (happens only in debug builds). 429 */ 430 431 /* Returns 2nd arg. Used to substitute default value if caller's vararg list 432 * is empty. 433 */ 434 #define __android_second(dummy, second, ...) second 435 436 /* If passed multiple args, returns ',' followed by all but 1st arg, otherwise 437 * returns nothing. 438 */ 439 #define __android_rest(first, ...) , ## __VA_ARGS__ 440 441 #define android_printAssert(cond, tag, fmt...) \ 442 __android_log_assert(cond, tag, \ 443 __android_second(0, ## fmt, NULL) __android_rest(fmt)) 444 445 #define android_writeLog(prio, tag, text) \ 446 __android_log_write(prio, tag, text) 447 448 #define android_bWriteLog(tag, payload, len) \ 449 __android_log_bwrite(tag, payload, len) 450 #define android_btWriteLog(tag, type, payload, len) \ 451 __android_log_btwrite(tag, type, payload, len) 452 453 // TODO: remove these prototypes and their users 454 #define android_testLog(prio, tag) (1) 455 #define android_writevLog(vec,num) do{}while(0) 456 #define android_write1Log(str,len) do{}while (0) 457 #define android_setMinPriority(tag, prio) do{}while(0) 458 //#define android_logToCallback(func) do{}while(0) 459 #define android_logToFile(tag, file) (0) 460 #define android_logToFd(tag, fd) (0) 461 462 typedef enum { 463 LOG_ID_MAIN = 0, 464 LOG_ID_RADIO = 1, 465 LOG_ID_EVENTS = 2, 466 LOG_ID_SYSTEM = 3, 467 468 LOG_ID_MAX 469 } log_id_t; 470 471 /* 472 * Send a simple string to the log. 473 */ 474 int __android_log_buf_write(int bufID, int prio, const char *tag, const char *text); 475 int __android_log_buf_print(int bufID, int prio, const char *tag, const char *fmt, ...); 476 477 478 #ifdef __cplusplus 479 } 480 #endif 481 482 #endif // _LIBS_CUTILS_LOG_H 483
