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Description:[feature] support customized hilog ring buffer size 

Change-Id: I5d23deaada5939bbb6fb57505f72c2348bd6afe9
Signed-off-by: shenchenkai <shenchenkai@huawei.com>
This commit is contained in:
shenchenkai 2021-12-17 15:45:15 +08:00
parent 62aa4aa0b1
commit 12cc392f46
2 changed files with 22 additions and 1 deletions
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16
platform/Kconfig
View File

@ -80,3 +80,19 @@ config HRTIMER_ENABLE
help
Enable High-resolution timer support
config HILOG
tristate "Hilog support"
default y
help
hilog buffer manager.
Hilog is a simple log manager for OpenHarmonyOS.
log string write to /dev/hilog, and the hilog driver copy it
to the ring buffer. Ring buffer can be read from userspace.
config HILOG_BUFFER_SIZE
int "hilog buffer size"
default 4096
help
Define the default ring buffer size of hilog

7
platform/los_hilog.c
View File

@ -41,7 +41,7 @@
#include "los_vm_lock.h"
#include "user_copy.h"
#define HILOG_BUFFER 4096
#define HILOG_BUFFER LOSCFG_HILOG_BUFFER_SIZE
#define DRIVER_MODE 0666
#define HILOG_DRIVER "/dev/hilog"
@ -255,6 +255,7 @@ static void HiLogCoverOldLog(size_t bufLen)
int retval;
struct HiLogEntry header;
size_t totalSize = bufLen + sizeof(struct HiLogEntry);
int dropLogLines = 0;
while (totalSize + g_hiLogDev.size > HILOG_BUFFER) {
retval = HiLogReadRingBuffer((unsigned char *)&header, sizeof(header));
@ -262,9 +263,13 @@ static void HiLogCoverOldLog(size_t bufLen)
break;
}
dropLogLines++;
HiLogBufferDec(sizeof(header));
HiLogBufferDec(header.len);
}
if (dropLogLines > 0) {
dprintf("hilog ringbuffer full, drop %d line(s) log", dropLogLines);
}
}
int HiLogWriteInternal(const char *buffer, size_t bufLen)