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b573641f9ea02e40bede078f513b67c3613491f5
system/core/liblog/include/log/log_system.h
/*
* Simplified macro to send an info system log message using current LOG_TAG.
*/
#ifndef SLOGI
#define SLOGI(...) \
((void)__android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_INFO, LOG_TAG, \
__VA_ARGS__))
#endif
=============================================
system/core/liblog/include/log/log_main.h
/*
* Simplified macro to send an info log message using the current LOG_TAG.
*/
#ifndef ALOGI
#define ALOGI(...) ((void)ALOG(LOG_INFO, LOG_TAG, __VA_ARGS__))
#endif
/*
* Basic log message macro.
*
* Example:
* ALOG(LOG_WARN, NULL, "Failed with error %d", errno);
*
* The second argument may be NULL or "" to indicate the "global" tag.
*/
#ifndef ALOG
#define ALOG(priority, tag, ...) LOG_PRI(ANDROID_##priority, tag, __VA_ARGS__)
#endif
/*
* Log macro that allows you to specify a number for the priority.
*/
#ifndef LOG_PRI
#define LOG_PRI(priority, tag, ...) android_printLog(priority, tag, __VA_ARGS__)
#endif
#define android_printLog(prio, tag, ...) \
__android_log_print(prio, tag, __VA_ARGS__)
==============================
system/core/liblog/logger_write.c:
LIBLOG_ABI_PUBLIC int __android_log_print(int prio, const char* tag,
const char* fmt, ...) {
va_list ap;
char buf[LOG_BUF_SIZE];
va_start(ap, fmt);
vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
va_end(ap);
return __android_log_write(prio, tag, buf);
}
LIBLOG_ABI_PUBLIC int __android_log_write(int prio, const char* tag,
const char* msg) {
return __android_log_buf_write(LOG_ID_MAIN, prio, tag, msg);
}
LIBLOG_ABI_PUBLIC int __android_log_buf_print(int bufID, int prio,
const char* tag, const char* fmt,
...) {
va_list ap;
char buf[LOG_BUF_SIZE];
va_start(ap, fmt);
vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
va_end(ap);
return __android_log_buf_write(bufID, prio, tag, buf);
}
LIBLOG_ABI_PUBLIC int __android_log_buf_write(int bufID, int prio,
const char* tag, const char* msg) {
struct iovec vec[3];
char tmp_tag[32];
if (!tag) tag = "";
/* XXX: This needs to go! */
if (bufID != LOG_ID_RADIO) {
switch (tag[0]) {
case 'H':
if (strcmp(tag + 1, "HTC_RIL" + 1)) break;
goto inform;
case 'R':
/* Any log tag with "RIL" as the prefix */
if (strncmp(tag + 1, "RIL" + 1, strlen("RIL") - 1)) break;
goto inform;
case 'Q':
/* Any log tag with "QC_RIL" as the prefix */
if (strncmp(tag + 1, "QC_RIL" + 1, strlen("QC_RIL") - 1)) break;
goto inform;
case 'I':
/* Any log tag with "IMS" as the prefix */
if (strncmp(tag + 1, "IMS" + 1, strlen("IMS") - 1)) break;
goto inform;
case 'A':
if (strcmp(tag + 1, "AT" + 1)) break;
goto inform;
case 'G':
if (strcmp(tag + 1, "GSM" + 1)) break;
goto inform;
case 'S':
if (strcmp(tag + 1, "STK" + 1) && strcmp(tag + 1, "SMS" + 1)) break;
goto inform;
case 'C':
if (strcmp(tag + 1, "CDMA" + 1)) break;
goto inform;
case 'P':
if (strcmp(tag + 1, "PHONE" + 1)) break;
/* FALLTHRU */
inform:
bufID = LOG_ID_RADIO;
snprintf(tmp_tag, sizeof(tmp_tag), "use-Rlog/RLOG-%s", tag);
tag = tmp_tag;
/* FALLTHRU */
default:
break;
}
}
#if __BIONIC__
if (prio == ANDROID_LOG_FATAL) {
android_set_abort_message(msg);
}
#endif
vec[0].iov_base = (unsigned char*)&prio;
vec[0].iov_len = 1;
vec[1].iov_base = (void*)tag;
vec[1].iov_len = strlen(tag) + 1;
vec[2].iov_base = (void*)msg;
vec[2].iov_len = strlen(msg) + 1;
return write_to_log(bufID, vec, 3);
}
static int __write_to_log_init(log_id_t log_id, struct iovec* vec, size_t nr) {
__android_log_lock();
if (write_to_log == __write_to_log_init) {
int ret;
ret = __write_to_log_initialize();
if (ret < 0) {
__android_log_unlock();
if (!list_empty(&__android_log_persist_write)) {
__write_to_log_daemon(log_id, vec, nr);
}
return ret;
}
write_to_log = __write_to_log_daemon;
}
__android_log_unlock();
return write_to_log(log_id, vec, nr);
}
static int __write_to_log_daemon(log_id_t log_id, struct iovec* vec, size_t nr) {
ret = 0;
i = 1 << log_id;
write_transport_for_each(node, &__android_log_transport_write) {
if (node->logMask & i) {
ssize_t retval;
retval = (*node->write)(log_id, &ts, vec, nr);
if (ret >= 0) {
ret = retval;
}
}
}
write_transport_for_each(node, &__android_log_persist_write) {
if (node->logMask & i) {
(void)(*node->write)(log_id, &ts, vec, nr);
}
}
return ret;
}
==========================================
android_logger_list_alloc_time
android_logger_list_alloc
dev->logger_list = logger_list;
dev->logger = android_logger_open(logger_list,android_name_to_log_id(dev->device));
android_logger_list_read
android_log_processLogBuffer
android_log_shouldPrintLine
android_log_printLogLine
android_logger_set_log_size
android_log_logger_setSize,
system/core/liblog/include/private/android_logger.h
#define LOG_BUFFER_SIZE (256 * 1024) /* Tuned with ro.logd.size per-platform
system/core/logd/LogBuffer.cpp
__android_logger_get_buffer_size
--------------------------------------------------------------------------------
# Set default log size on userdebug/eng build to 1M
ifneq (,$(filter userdebug eng, $(TARGET_BUILD_VARIANT)))
PRODUCT_PROPERTY_OVERRIDES += ro.logd.size=1M
endif
--------------------------------------------------------------------------------
system/core/logcat
system/core/logd
system/core/logwrapper
system/core/liblog
system/core/include/log/
system/core/include/private/android_logger.h
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