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_LOG_LOG_H 29 #define _LIBS_LOG_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 <log/uio.h> 41 #include <log/logd.h> 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 // --------------------------------------------------------------------- 48 49 /* 50 * Normally we strip ALOGV (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 ALOGV 77 #if LOG_NDEBUG 78 #define ALOGV(...) ((void)0) 79 #else 80 #define ALOGV(...) ((void)ALOG(LOG_VERBOSE, LOG_TAG, __VA_ARGS__)) 81 #endif 82 #endif 83 84 #define CONDITION(cond) (__builtin_expect((cond)!=0, 0)) 85 86 #ifndef ALOGV_IF 87 #if LOG_NDEBUG 88 #define ALOGV_IF(cond, ...) ((void)0) 89 #else 90 #define ALOGV_IF(cond, ...) \ 91 ( (CONDITION(cond)) \ 92 ? ((void)ALOG(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 ALOGD 101 #define ALOGD(...) ((void)ALOG(LOG_DEBUG, LOG_TAG, __VA_ARGS__)) 102 #endif 103 104 #ifndef ALOGD_IF 105 #define ALOGD_IF(cond, ...) \ 106 ( (CONDITION(cond)) \ 107 ? ((void)ALOG(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 ALOGI 115 #define ALOGI(...) ((void)ALOG(LOG_INFO, LOG_TAG, __VA_ARGS__)) 116 #endif 117 118 #ifndef ALOGI_IF 119 #define ALOGI_IF(cond, ...) \ 120 ( (CONDITION(cond)) \ 121 ? ((void)ALOG(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 ALOGW 129 #define ALOGW(...) ((void)ALOG(LOG_WARN, LOG_TAG, __VA_ARGS__)) 130 #endif 131 132 #ifndef ALOGW_IF 133 #define ALOGW_IF(cond, ...) \ 134 ( (CONDITION(cond)) \ 135 ? ((void)ALOG(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 ALOGE 143 #define ALOGE(...) ((void)ALOG(LOG_ERROR, LOG_TAG, __VA_ARGS__)) 144 #endif 145 146 #ifndef ALOGE_IF 147 #define ALOGE_IF(cond, ...) \ 148 ( (CONDITION(cond)) \ 149 ? ((void)ALOG(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_ALOGV 160 #if LOG_NDEBUG 161 #define IF_ALOGV() if (false) 162 #else 163 #define IF_ALOGV() IF_ALOG(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_ALOGD 172 #define IF_ALOGD() IF_ALOG(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_ALOGI 180 #define IF_ALOGI() IF_ALOG(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_ALOGW 188 #define IF_ALOGW() IF_ALOG(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_ALOGE 196 #define IF_ALOGE() IF_ALOG(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 * Simplified macro to send a verbose radio log message using the current LOG_TAG. 286 */ 287 #ifndef RLOGV 288 #if LOG_NDEBUG 289 #define RLOGV(...) ((void)0) 290 #else 291 #define RLOGV(...) ((void)__android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_VERBOSE, LOG_TAG, __VA_ARGS__)) 292 #endif 293 #endif 294 295 #define CONDITION(cond) (__builtin_expect((cond)!=0, 0)) 296 297 #ifndef RLOGV_IF 298 #if LOG_NDEBUG 299 #define RLOGV_IF(cond, ...) ((void)0) 300 #else 301 #define RLOGV_IF(cond, ...) \ 302 ( (CONDITION(cond)) \ 303 ? ((void)__android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_VERBOSE, LOG_TAG, __VA_ARGS__)) \ 304 : (void)0 ) 305 #endif 306 #endif 307 308 /* 309 * Simplified macro to send a debug radio log message using the current LOG_TAG. 310 */ 311 #ifndef RLOGD 312 #define RLOGD(...) ((void)__android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__)) 313 #endif 314 315 #ifndef RLOGD_IF 316 #define RLOGD_IF(cond, ...) \ 317 ( (CONDITION(cond)) \ 318 ? ((void)__android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__)) \ 319 : (void)0 ) 320 #endif 321 322 /* 323 * Simplified macro to send an info radio log message using the current LOG_TAG. 324 */ 325 #ifndef RLOGI 326 #define RLOGI(...) ((void)__android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)) 327 #endif 328 329 #ifndef RLOGI_IF 330 #define RLOGI_IF(cond, ...) \ 331 ( (CONDITION(cond)) \ 332 ? ((void)__android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)) \ 333 : (void)0 ) 334 #endif 335 336 /* 337 * Simplified macro to send a warning radio log message using the current LOG_TAG. 338 */ 339 #ifndef RLOGW 340 #define RLOGW(...) ((void)__android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_WARN, LOG_TAG, __VA_ARGS__)) 341 #endif 342 343 #ifndef RLOGW_IF 344 #define RLOGW_IF(cond, ...) \ 345 ( (CONDITION(cond)) \ 346 ? ((void)__android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_WARN, LOG_TAG, __VA_ARGS__)) \ 347 : (void)0 ) 348 #endif 349 350 /* 351 * Simplified macro to send an error radio log message using the current LOG_TAG. 352 */ 353 #ifndef RLOGE 354 #define RLOGE(...) ((void)__android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)) 355 #endif 356 357 #ifndef RLOGE_IF 358 #define RLOGE_IF(cond, ...) \ 359 ( (CONDITION(cond)) \ 360 ? ((void)__android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)) \ 361 : (void)0 ) 362 #endif 363 364 365 // --------------------------------------------------------------------- 366 367 /* 368 * Log a fatal error. If the given condition fails, this stops program 369 * execution like a normal assertion, but also generating the given message. 370 * It is NOT stripped from release builds. Note that the condition test 371 * is -inverted- from the normal assert() semantics. 372 */ 373 #ifndef LOG_ALWAYS_FATAL_IF 374 #define LOG_ALWAYS_FATAL_IF(cond, ...) \ 375 ( (CONDITION(cond)) \ 376 ? ((void)android_printAssert(#cond, LOG_TAG, ## __VA_ARGS__)) \ 377 : (void)0 ) 378 #endif 379 380 #ifndef LOG_ALWAYS_FATAL 381 #define LOG_ALWAYS_FATAL(...) \ 382 ( ((void)android_printAssert(NULL, LOG_TAG, ## __VA_ARGS__)) ) 383 #endif 384 385 /* 386 * Versions of LOG_ALWAYS_FATAL_IF and LOG_ALWAYS_FATAL that 387 * are stripped out of release builds. 388 */ 389 #if LOG_NDEBUG 390 391 #ifndef LOG_FATAL_IF 392 #define LOG_FATAL_IF(cond, ...) ((void)0) 393 #endif 394 #ifndef LOG_FATAL 395 #define LOG_FATAL(...) ((void)0) 396 #endif 397 398 #else 399 400 #ifndef LOG_FATAL_IF 401 #define LOG_FATAL_IF(cond, ...) LOG_ALWAYS_FATAL_IF(cond, ## __VA_ARGS__) 402 #endif 403 #ifndef LOG_FATAL 404 #define LOG_FATAL(...) LOG_ALWAYS_FATAL(__VA_ARGS__) 405 #endif 406 407 #endif 408 409 /* 410 * Assertion that generates a log message when the assertion fails. 411 * Stripped out of release builds. Uses the current LOG_TAG. 412 */ 413 #ifndef ALOG_ASSERT 414 #define ALOG_ASSERT(cond, ...) LOG_FATAL_IF(!(cond), ## __VA_ARGS__) 415 //#define ALOG_ASSERT(cond) LOG_FATAL_IF(!(cond), "Assertion failed: " #cond) 416 #endif 417 418 // --------------------------------------------------------------------- 419 420 /* 421 * Basic log message macro. 422 * 423 * Example: 424 * ALOG(LOG_WARN, NULL, "Failed with error %d", errno); 425 * 426 * The second argument may be NULL or "" to indicate the "global" tag. 427 */ 428 #ifndef ALOG 429 #define ALOG(priority, tag, ...) \ 430 LOG_PRI(ANDROID_##priority, tag, __VA_ARGS__) 431 #endif 432 433 /* 434 * Log macro that allows you to specify a number for the priority. 435 */ 436 #ifndef LOG_PRI 437 #define LOG_PRI(priority, tag, ...) \ 438 android_printLog(priority, tag, __VA_ARGS__) 439 #endif 440 441 /* 442 * Log macro that allows you to pass in a varargs ("args" is a va_list). 443 */ 444 #ifndef LOG_PRI_VA 445 #define LOG_PRI_VA(priority, tag, fmt, args) \ 446 android_vprintLog(priority, NULL, tag, fmt, args) 447 #endif 448 449 /* 450 * Conditional given a desired logging priority and tag. 451 */ 452 #ifndef IF_ALOG 453 #define IF_ALOG(priority, tag) \ 454 if (android_testLog(ANDROID_##priority, tag)) 455 #endif 456 457 // --------------------------------------------------------------------- 458 459 /* 460 * Event logging. 461 */ 462 463 /* 464 * Event log entry types. These must match up with the declarations in 465 * java/android/android/util/EventLog.java. 466 */ 467 typedef enum { 468 EVENT_TYPE_INT = 0, 469 EVENT_TYPE_LONG = 1, 470 EVENT_TYPE_STRING = 2, 471 EVENT_TYPE_LIST = 3, 472 } AndroidEventLogType; 473 474 475 #ifndef LOG_EVENT_INT 476 #define LOG_EVENT_INT(_tag, _value) { \ 477 int intBuf = _value; \ 478 (void) android_btWriteLog(_tag, EVENT_TYPE_INT, &intBuf, \ 479 sizeof(intBuf)); \ 480 } 481 #endif 482 #ifndef LOG_EVENT_LONG 483 #define LOG_EVENT_LONG(_tag, _value) { \ 484 long long longBuf = _value; \ 485 (void) android_btWriteLog(_tag, EVENT_TYPE_LONG, &longBuf, \ 486 sizeof(longBuf)); \ 487 } 488 #endif 489 #ifndef LOG_EVENT_STRING 490 #define LOG_EVENT_STRING(_tag, _value) \ 491 ((void) 0) /* not implemented -- must combine len with string */ 492 #endif 493 /* TODO: something for LIST */ 494 495 /* 496 * =========================================================================== 497 * 498 * The stuff in the rest of this file should not be used directly. 499 */ 500 501 #define android_printLog(prio, tag, fmt...) \ 502 __android_log_print(prio, tag, fmt) 503 504 #define android_vprintLog(prio, cond, tag, fmt...) \ 505 __android_log_vprint(prio, tag, fmt) 506 507 /* XXX Macros to work around syntax errors in places where format string 508 * arg is not passed to ALOG_ASSERT, LOG_ALWAYS_FATAL or LOG_ALWAYS_FATAL_IF 509 * (happens only in debug builds). 510 */ 511 512 /* Returns 2nd arg. Used to substitute default value if caller's vararg list 513 * is empty. 514 */ 515 #define __android_second(dummy, second, ...) second 516 517 /* If passed multiple args, returns ',' followed by all but 1st arg, otherwise 518 * returns nothing. 519 */ 520 #define __android_rest(first, ...) , ## __VA_ARGS__ 521 522 #define android_printAssert(cond, tag, fmt...) \ 523 __android_log_assert(cond, tag, \ 524 __android_second(0, ## fmt, NULL) __android_rest(fmt)) 525 526 #define android_writeLog(prio, tag, text) \ 527 __android_log_write(prio, tag, text) 528 529 #define android_bWriteLog(tag, payload, len) \ 530 __android_log_bwrite(tag, payload, len) 531 #define android_btWriteLog(tag, type, payload, len) \ 532 __android_log_btwrite(tag, type, payload, len) 533 534 // TODO: remove these prototypes and their users 535 #define android_testLog(prio, tag) (1) 536 #define android_writevLog(vec,num) do{}while(0) 537 #define android_write1Log(str,len) do{}while (0) 538 #define android_setMinPriority(tag, prio) do{}while(0) 539 //#define android_logToCallback(func) do{}while(0) 540 #define android_logToFile(tag, file) (0) 541 #define android_logToFd(tag, fd) (0) 542 543 typedef enum { 544 LOG_ID_MAIN = 0, 545 LOG_ID_RADIO = 1, 546 LOG_ID_EVENTS = 2, 547 LOG_ID_SYSTEM = 3, 548 549 LOG_ID_MAX 550 } log_id_t; 551 552 /* 553 * Send a simple string to the log. 554 */ 555 int __android_log_buf_write(int bufID, int prio, const char *tag, const char *text); 556 int __android_log_buf_print(int bufID, int prio, const char *tag, const char *fmt, ...); 557 558 559 #ifdef __cplusplus 560 } 561 #endif 562 563 #endif // _LIBS_CUTILS_LOG_H 564