1 /* 2 * ALOG Levels: F - Fatal, E - Error, W - Warning, I - Info, D - Debug, V - Verbose 3 * 4 * Using them to work within the Android logcat logging mechanism: 5 * 6 * % logcat '*:v' [To display Verbose Logging] 7 * % logcat 'fcntl_portable:v' [To display just this fcntl logging] 8 * 9 * NOTE: This assumes you only use the 'PORTABLE_TAG'; which is the default. 10 * For debugging LTP it's been helpful to include the LTP program being tested; 11 * which is enabled below with #define EXTENDED_LOGGING. 12 * 13 * Logging routines also support ALOG*_IF() and ASSERT(); For details See: 14 * 15 * ${ANDROID_TOP}/system/core/include/cutils/log.h 16 * and 17 * http://developer.android.com/tools/debugging/debugging-log.html 18 * 19 * ALOGV is turned off by release builds: Use the #define below with LOG_NDEBUG=0 to enable. 20 * 21 * Strace works fine with ALOG out if a large max string size is used via the -s option; 22 * Example: 23 * 24 * strace -s 132 ./sigaction01 25 * 26 * writev(3, [{"\2", 1}, 27 * {"./sigaction01`signal_portable\0", 30}, 28 * {"sigaction_portable(portable_signum:10:'SIGUSR1_PORTABLE:10', ... 29 * {"map_portable_sigset_to_mips(portable_sigset:0x7fe47a0c, ... 30 * ... 31 */ 32 33 /* 34 * Enable LOG_NDEBUG to have debug code visible in logcat output by default. 35 * Also possible via the Lib-Portable Android.mk file. Example: 36 * 37 * # Have logging permanently enable during development. 38 * LOCAL_CFLAGS += -DLOG_NDEBUG=0 39 */ 40 // # define LOG_NDEBUG 0 41 42 43 // #define EXTENDED_LOGGING /* Include the current program name in the LOG_TAG */ 44 #ifdef EXTENDED_LOGGING 45 /* 46 * Inline function to put the current program name 47 * and this library into the logcat prefix. Example: 48 * 49 * V/./sigaction01`signal_portable(605): sigaction_portable(... ) { 50 * ----------------------------- 51 * 52 * Disabled by default in AOSP, enable by removing the // above. 53 * Useful when debugging more than one program; For example LTP has thousands. 54 */ 55 #define MAX_TAG_LEN 128 56 static char my_portable_tag[MAX_TAG_LEN + 1]; 57 58 static inline char *portable_tag() { 59 extern char *__progname; 60 61 if (my_portable_tag[0] == '\000') { 62 strncat(&my_portable_tag[0], __progname, MAX_TAG_LEN); 63 strncat(&my_portable_tag[0], ".", MAX_TAG_LEN - strlen(my_portable_tag)); 64 strncat(&my_portable_tag[0], PORTABLE_TAG, MAX_TAG_LEN - strlen(my_portable_tag)); 65 } 66 return my_portable_tag; 67 } 68 #define LOG_TAG portable_tag() 69 #else /* !EXTENDED_LOGGING */ 70 #define LOG_TAG PORTABLE_TAG 71 #endif 72 73 /* 74 * Override LOG_PRI() defined in ${AOSP}/system/core/include/cutils/log.h 75 * to preserve the value of errno while logging. 76 */ 77 #define LOG_PRI(priority, tag, ...) ({ \ 78 int _errno = *REAL(__errno)(); \ 79 int _rv = android_printLog(priority, tag, __VA_ARGS__); \ 80 *REAL(__errno)() = _errno; \ 81 _rv; /* Returned to caller */ \ 82 }) 83 84 #if !defined(__HOST__) 85 #include <cutils/log.h> 86 87 # define PERROR(str) { \ 88 ALOGE("%s: PERROR('%s'): errno:%d:'%s'", __func__, str, *REAL(__errno)(), strerror(errno)); \ 89 } 90 91 # define ASSERT(cond) ALOG_ASSERT(cond, "assertion failed:(%s), file: %s, line: %d:%s", \ 92 #cond, __FILE__, __LINE__, __func__); 93 #else 94 #include <assert.h> 95 # define PERROR(str) fprintf(stderr, "%s: PERROR('%s'): errno:%d:'%s'", __func__, str, *REAL(__errno)(), strerror(*REAL(__errno)())) 96 # define ASSERT(cond) assert(cond) 97 # define ALOGV(a,...) 98 # define ALOGW(a,...) 99 # define ALOGE(a,...) 100 101 #endif
