Trace 的协作图:

结构体
struct	TraceClientCmd

struct	TraceNotifyFrame

struct	TraceOfflineHeaderInfo

struct	TraceBaseHeaderInfo
	http://weharmonyos.com/openharmony/zh-cn/device-dev/kernel/kernel-mini-memory-trace.html 更多...

struct	TraceEventFrame

struct	ObjData

struct	OfflineHead

类型定义
typedef BOOL(*	TRACE_HWI_FILTER_HOOK) (UINT32 hwiNum)
	Define the type of trace hardware interrupt filter hook function. 更多...

枚举
enum	TraceState { TRACE_UNINIT = 0 , TRACE_INITED , TRACE_STARTED , TRACE_STOPED }

enum	LOS_TRACE_MASK { TRACE_SYS_FLAG = 0x10 , TRACE_HWI_FLAG = 0x20 , TRACE_TASK_FLAG = 0x40 , TRACE_SWTMR_FLAG = 0x80 , TRACE_MEM_FLAG = 0x100 , TRACE_QUE_FLAG = 0x200 , TRACE_EVENT_FLAG = 0x400 , TRACE_SEM_FLAG = 0x800 , TRACE_MUX_FLAG = 0x1000 , TRACE_IPC_FLAG = 0x2000 , TRACE_MAX_FLAG = 0x80000000 , TRACE_USER_DEFAULT_FLAG = 0xFFFFFFF0 }

enum	LOS_TRACE_TYPE { SYS_ERROR = TRACE_SYS_FLAG \| 0 , SYS_START = TRACE_SYS_FLAG \| 1 , SYS_STOP = TRACE_SYS_FLAG \| 2 , HWI_CREATE = TRACE_HWI_FLAG \| 0 , HWI_CREATE_SHARE = TRACE_HWI_FLAG \| 1 , HWI_DELETE = TRACE_HWI_FLAG \| 2 , HWI_DELETE_SHARE = TRACE_HWI_FLAG \| 3 , HWI_RESPONSE_IN = TRACE_HWI_FLAG \| 4 , HWI_RESPONSE_OUT = TRACE_HWI_FLAG \| 5 , HWI_ENABLE = TRACE_HWI_FLAG \| 6 , HWI_DISABLE = TRACE_HWI_FLAG \| 7 , HWI_TRIGGER = TRACE_HWI_FLAG \| 8 , HWI_SETPRI = TRACE_HWI_FLAG \| 9 , HWI_CLEAR = TRACE_HWI_FLAG \| 10 , HWI_SETAFFINITY = TRACE_HWI_FLAG \| 11 , HWI_SENDIPI = TRACE_HWI_FLAG \| 12 , TASK_CREATE = TRACE_TASK_FLAG \| 0 , TASK_PRIOSET = TRACE_TASK_FLAG \| 1 , TASK_DELETE = TRACE_TASK_FLAG \| 2 , TASK_SUSPEND = TRACE_TASK_FLAG \| 3 , TASK_RESUME = TRACE_TASK_FLAG \| 4 , TASK_SWITCH = TRACE_TASK_FLAG \| 5 , TASK_SIGNAL = TRACE_TASK_FLAG \| 6 , SWTMR_CREATE = TRACE_SWTMR_FLAG \| 0 , SWTMR_DELETE = TRACE_SWTMR_FLAG \| 1 , SWTMR_START = TRACE_SWTMR_FLAG \| 2 , SWTMR_STOP = TRACE_SWTMR_FLAG \| 3 , SWTMR_EXPIRED = TRACE_SWTMR_FLAG \| 4 , MEM_ALLOC = TRACE_MEM_FLAG \| 0 , MEM_ALLOC_ALIGN = TRACE_MEM_FLAG \| 1 , MEM_REALLOC = TRACE_MEM_FLAG \| 2 , MEM_FREE = TRACE_MEM_FLAG \| 3 , MEM_INFO_REQ = TRACE_MEM_FLAG \| 4 , MEM_INFO = TRACE_MEM_FLAG \| 5 , QUEUE_CREATE = TRACE_QUE_FLAG \| 0 , QUEUE_DELETE = TRACE_QUE_FLAG \| 1 , QUEUE_RW = TRACE_QUE_FLAG \| 2 , EVENT_CREATE = TRACE_EVENT_FLAG \| 0 , EVENT_DELETE = TRACE_EVENT_FLAG \| 1 , EVENT_READ = TRACE_EVENT_FLAG \| 2 , EVENT_WRITE = TRACE_EVENT_FLAG \| 3 , EVENT_CLEAR = TRACE_EVENT_FLAG \| 4 , SEM_CREATE = TRACE_SEM_FLAG \| 0 , SEM_DELETE = TRACE_SEM_FLAG \| 1 , SEM_PEND = TRACE_SEM_FLAG \| 2 , SEM_POST = TRACE_SEM_FLAG \| 3 , MUX_CREATE = TRACE_MUX_FLAG \| 0 , MUX_DELETE = TRACE_MUX_FLAG \| 1 , MUX_PEND = TRACE_MUX_FLAG \| 2 , MUX_POST = TRACE_MUX_FLAG \| 3 , IPC_WRITE_DROP = TRACE_IPC_FLAG \| 0 , IPC_WRITE = TRACE_IPC_FLAG \| 1 , IPC_READ_DROP = TRACE_IPC_FLAG \| 2 , IPC_READ = TRACE_IPC_FLAG \| 3 , IPC_TRY_READ = TRACE_IPC_FLAG \| 4 , IPC_READ_TIMEOUT = TRACE_IPC_FLAG \| 5 , IPC_KILL = TRACE_IPC_FLAG \| 6 }

函数
UINT32	OsTraceDataEncode (UINT8 type, const TlvTable table, UINT8 src, UINT8 *dest, INT32 destLen)
	Encode trace raw data. 更多...

UINT32	LOS_TraceStart (VOID)
	Start trace. 更多...

VOID	LOS_TraceStop (VOID)
	Stop trace. 更多...

VOID	LOS_TraceReset (VOID)
	Clear the trace buf. 更多...

VOID	LOS_TraceEventMaskSet (UINT32 mask)
	Set trace event mask. 更多...

VOID	LOS_TraceRecordDump (BOOL toClient)
	Offline trace buffer display. 更多...

OfflineHead *	LOS_TraceRecordGet (VOID)
	Offline trace buffer export. 更多...

VOID	LOS_TraceHwiFilterHookReg (TRACE_HWI_FILTER_HOOK hook)
	Hwi num fliter hook. 更多...

详细描述

类型定义说明

◆ TRACE_HWI_FILTER_HOOK

typedef BOOL(* TRACE_HWI_FILTER_HOOK) (UINT32 hwiNum)

Define the type of trace hardware interrupt filter hook function.

Description:: User can register fliter function by LOS_TraceHwiFilterHookReg to filter hardware interrupt events. Return true if user don't need trace the certain number.

注意: None.

参数

hwiNum [IN] Type UINT32. The hardware interrupt number.

返回值

#TRUE	0x00000001: Not record the certain number.
#FALSE	0x00000000: Need record the certain number.

Dependency:

los_trace.h: the header file that contains the API declaration.

在文件 los_trace.h 第 336 行定义.

枚举类型说明

◆ LOS_TRACE_MASK

enum LOS_TRACE_MASK

Trace mask is used to filter events in runtime. Each mask keep only one unique bit to 1, and user can define own module's trace mask.

枚举值
TRACE_SYS_FLAG	跟踪系统
TRACE_HWI_FLAG	跟踪硬中断
TRACE_TASK_FLAG	跟踪任务/线程
TRACE_SWTMR_FLAG	跟踪软件定时器
TRACE_MEM_FLAG	跟踪内存
TRACE_QUE_FLAG	跟踪队列
TRACE_EVENT_FLAG	跟踪事件
TRACE_SEM_FLAG	跟踪信号量
TRACE_MUX_FLAG	跟踪互斥量
TRACE_IPC_FLAG	跟踪IPC
TRACE_MAX_FLAG
TRACE_USER_DEFAULT_FLAG

在文件 los_trace.h 第 121 行定义.

             {
    TRACE_SYS_FLAG          = 0x10, ///< 跟踪系统
    TRACE_HWI_FLAG          = 0x20, ///< 跟踪硬中断
    TRACE_TASK_FLAG         = 0x40, ///< 跟踪任务/线程
    TRACE_SWTMR_FLAG        = 0x80, ///< 跟踪软件定时器
    TRACE_MEM_FLAG          = 0x100,    ///< 跟踪内存
    TRACE_QUE_FLAG          = 0x200,    ///< 跟踪队列
    TRACE_EVENT_FLAG        = 0x400,    ///< 跟踪事件
    TRACE_SEM_FLAG          = 0x800,    ///< 跟踪信号量
    TRACE_MUX_FLAG          = 0x1000,   ///< 跟踪互斥量
    TRACE_IPC_FLAG          = 0x2000,   ///< 跟踪IPC
 
    TRACE_MAX_FLAG          = 0x80000000,
    TRACE_USER_DEFAULT_FLAG = 0xFFFFFFF0,
} LOS_TRACE_MASK;

◆ LOS_TRACE_TYPE

enum LOS_TRACE_TYPE

Trace event type which indicate the exactly happend events, user can define own module's event type like TRACE_::MODULE::_FLAG | NUMBER. 28 4 0 0 0 0 0 0 0 0 X X X X X X X X 0 0 0 0 0 0 | | | trace_module_flag number

枚举值
SYS_ERROR
SYS_START	trace模块开始
SYS_STOP	trace模块停止
HWI_CREATE
HWI_CREATE_SHARE
HWI_DELETE
HWI_DELETE_SHARE
HWI_RESPONSE_IN
HWI_RESPONSE_OUT
HWI_ENABLE
HWI_DISABLE
HWI_TRIGGER
HWI_SETPRI
HWI_CLEAR
HWI_SETAFFINITY
HWI_SENDIPI
TASK_CREATE
TASK_PRIOSET
TASK_DELETE
TASK_SUSPEND
TASK_RESUME
TASK_SWITCH
TASK_SIGNAL
SWTMR_CREATE
SWTMR_DELETE
SWTMR_START
SWTMR_STOP
SWTMR_EXPIRED
MEM_ALLOC
MEM_ALLOC_ALIGN
MEM_REALLOC
MEM_FREE
MEM_INFO_REQ
MEM_INFO
QUEUE_CREATE
QUEUE_DELETE
QUEUE_RW
EVENT_CREATE
EVENT_DELETE
EVENT_READ
EVENT_WRITE
EVENT_CLEAR
SEM_CREATE
SEM_DELETE
SEM_PEND
SEM_POST
MUX_CREATE
MUX_DELETE
MUX_PEND
MUX_POST
IPC_WRITE_DROP
IPC_WRITE
IPC_READ_DROP
IPC_READ
IPC_TRY_READ
IPC_READ_TIMEOUT
IPC_KILL

在文件 los_trace.h 第 147 行定义.

             { //跟进模块的具体事件
    /* 0x10~0x1F */
    SYS_ERROR             = TRACE_SYS_FLAG | 0,
    SYS_START             = TRACE_SYS_FLAG | 1, ///< trace模块开始
    SYS_STOP              = TRACE_SYS_FLAG | 2, ///< trace模块停止
 
    /* 0x20~0x2F */
    HWI_CREATE              = TRACE_HWI_FLAG | 0,
    HWI_CREATE_SHARE        = TRACE_HWI_FLAG | 1,
    HWI_DELETE              = TRACE_HWI_FLAG | 2,
    HWI_DELETE_SHARE        = TRACE_HWI_FLAG | 3,
    HWI_RESPONSE_IN         = TRACE_HWI_FLAG | 4,
    HWI_RESPONSE_OUT        = TRACE_HWI_FLAG | 5,
    HWI_ENABLE              = TRACE_HWI_FLAG | 6,
    HWI_DISABLE             = TRACE_HWI_FLAG | 7,
    HWI_TRIGGER             = TRACE_HWI_FLAG | 8,
    HWI_SETPRI              = TRACE_HWI_FLAG | 9,
    HWI_CLEAR               = TRACE_HWI_FLAG | 10,
    HWI_SETAFFINITY         = TRACE_HWI_FLAG | 11,
    HWI_SENDIPI             = TRACE_HWI_FLAG | 12,
 
    /* 0x40~0x4F */
    TASK_CREATE           = TRACE_TASK_FLAG | 0,
    TASK_PRIOSET          = TRACE_TASK_FLAG | 1,
    TASK_DELETE           = TRACE_TASK_FLAG | 2,
    TASK_SUSPEND          = TRACE_TASK_FLAG | 3,
    TASK_RESUME           = TRACE_TASK_FLAG | 4,
    TASK_SWITCH           = TRACE_TASK_FLAG | 5,
    TASK_SIGNAL           = TRACE_TASK_FLAG | 6,
 
    /* 0x80~0x8F */
    SWTMR_CREATE          = TRACE_SWTMR_FLAG | 0,
    SWTMR_DELETE          = TRACE_SWTMR_FLAG | 1,
    SWTMR_START           = TRACE_SWTMR_FLAG | 2,
    SWTMR_STOP            = TRACE_SWTMR_FLAG | 3,
    SWTMR_EXPIRED         = TRACE_SWTMR_FLAG | 4,
 
    /* 0x100~0x10F */
    MEM_ALLOC             = TRACE_MEM_FLAG | 0,
    MEM_ALLOC_ALIGN       = TRACE_MEM_FLAG | 1,
    MEM_REALLOC           = TRACE_MEM_FLAG | 2,
    MEM_FREE              = TRACE_MEM_FLAG | 3,
    MEM_INFO_REQ          = TRACE_MEM_FLAG | 4,
    MEM_INFO              = TRACE_MEM_FLAG | 5,
 
    /* 0x200~0x20F */
    QUEUE_CREATE          = TRACE_QUE_FLAG | 0,
    QUEUE_DELETE          = TRACE_QUE_FLAG | 1,
    QUEUE_RW              = TRACE_QUE_FLAG | 2,
 
    /* 0x400~0x40F */
    EVENT_CREATE          = TRACE_EVENT_FLAG | 0,
    EVENT_DELETE          = TRACE_EVENT_FLAG | 1,
    EVENT_READ            = TRACE_EVENT_FLAG | 2,
    EVENT_WRITE           = TRACE_EVENT_FLAG | 3,
    EVENT_CLEAR           = TRACE_EVENT_FLAG | 4,
 
    /* 0x800~0x80F */
    SEM_CREATE            = TRACE_SEM_FLAG | 0,
    SEM_DELETE            = TRACE_SEM_FLAG | 1,
    SEM_PEND              = TRACE_SEM_FLAG | 2,
    SEM_POST              = TRACE_SEM_FLAG | 3,
 
    /* 0x1000~0x100F */
    MUX_CREATE            = TRACE_MUX_FLAG | 0,
    MUX_DELETE            = TRACE_MUX_FLAG | 1,
    MUX_PEND              = TRACE_MUX_FLAG | 2,
    MUX_POST              = TRACE_MUX_FLAG | 3,
 
    /* 0x2000~0x200F */
    IPC_WRITE_DROP        = TRACE_IPC_FLAG | 0,
    IPC_WRITE             = TRACE_IPC_FLAG | 1,
    IPC_READ_DROP         = TRACE_IPC_FLAG | 2,
    IPC_READ              = TRACE_IPC_FLAG | 3,
    IPC_TRY_READ          = TRACE_IPC_FLAG | 4,
    IPC_READ_TIMEOUT      = TRACE_IPC_FLAG | 5,
    IPC_KILL              = TRACE_IPC_FLAG | 6,
} LOS_TRACE_TYPE;

◆ TraceState

enum TraceState

Trace state. | 跟踪状态

枚举值
TRACE_UNINIT	trace isn't inited \| 未初始化
TRACE_INITED	trace is inited but not started yet \| 已初始化但未开始
TRACE_STARTED	trace is started and system is tracing \| 跟踪进行中...
TRACE_STOPED	trace is stopped \| 跟踪结束

在文件 los_trace.h 第 109 行定义.

                {
    TRACE_UNINIT = 0,  /**< trace isn't inited | 未初始化*/
    TRACE_INITED,      /**< trace is inited but not started yet | 已初始化但未开始*/
    TRACE_STARTED,     /**< trace is started and system is tracing | 跟踪进行中...*/
    TRACE_STOPED,      /**< trace is stopped | 跟踪结束*/
};

函数说明

◆ LOS_TraceEventMaskSet()

VOID LOS_TraceEventMaskSet ( UINT32 mask )

Set trace event mask.

Description:: Set trace event mask.

注意

Set trace event filter mask.
The Default mask is (TRACE_HWI_FLAG | TRACE_TASK_FLAG), stands for switch on task and hwi events.
Customize mask according to the type defined in enum LOS_TRACE_MASK to switch on corresponding module's trace.
The system's trace mask will be overrode by the input parameter.

参数

mask	[IN] Type UINT32. The mask used to filter events of LOS_TRACE_MASK.

返回值

#NA.

Dependency:

los_trace.h: the header file that contains the API declaration.

参见: LOS_TraceEventMaskSet

Set trace event mask.

在文件 los_trace.c 第 398 行定义.

{
    g_traceMask = mask & EVENT_MASK;
}

这是这个函数的调用关系图:

◆ LOS_TraceHwiFilterHookReg()

VOID LOS_TraceHwiFilterHookReg ( TRACE_HWI_FILTER_HOOK hook )

Hwi num fliter hook.

Description:: Hwi fliter function.

注意

Filter the hwi events by hwi num

参数

hook	[IN] Type TRACE_HWI_FILTER_HOOK. The user defined hook for hwi num filter, the hook should return true if you don't want trace this hwi num.

返回值

#None

Dependency:

los_trace.h: the header file that contains the API declaration.

参见: LOS_TraceHwiFilterHookReg

Hwi num fliter hook.

在文件 los_trace.c 第 427 行定义.

{
    UINT32 intSave;
 
    TRACE_LOCK(intSave);
    g_traceHwiFilterHook = hook;// 注册全局钩子函数
    TRACE_UNLOCK(intSave);
}

◆ LOS_TraceRecordDump()

VOID LOS_TraceRecordDump ( BOOL toClient )

Offline trace buffer display.

Description:: Display trace buf data only at offline mode.

注意

This API can be called only after that trace stopped. Otherwise the trace dump will be failed.
Trace data will be send to pipeline when user set toClient = TRUE. Otherwise it will be formatted and printed out.

参数

toClient [IN] Type BOOL. Whether send trace data to Client through pipeline.

返回值

#NA

Dependency:

los_trace.h: the header file that contains the API declaration.

参见: LOS_TraceRecordDump

Offline trace buffer display.

在文件 los_trace.c 第 403 行定义.

{
    if (g_traceState != TRACE_STOPED) {
        TRACE_ERROR("trace dump must after trace stopped , the current state is : %d\n", g_traceState);
        return;
    }
    OsTraceRecordDump(toClient);
}

函数调用图:

这是这个函数的调用关系图:

◆ LOS_TraceRecordGet()

OfflineHead * LOS_TraceRecordGet ( VOID )

Offline trace buffer export.

Description:: Return the trace buf only at offline mode.

注意

This API can be called only after that trace buffer has been established.
The return buffer's address is a critical resource, user can only ready.

参数

NA

返回值

#OfflineHead* The trace buffer's address, analyze this buffer according to the structure of OfflineHead.

Dependency:

los_trace.h: the header file that contains the API declaration.

参见: LOS_TraceRecordGet

Offline trace buffer export.

在文件 los_trace.c 第 412 行定义.

{
    return OsTraceRecordGet();
}

函数调用图:

这是这个函数的调用关系图:

◆ LOS_TraceReset()

VOID LOS_TraceReset ( VOID )

Clear the trace buf.

Description:: Clear the event frames in trace buf only at offline mode.

注意

This API can be called only after that trace buffer has been established. Otherwise, the trace will be failed.

参数

None.

返回值

#NA

Dependency:

los_trace.h: the header file that contains the API declaration.

参见: LOS_TraceReset

Clear the trace buf.

在文件 los_trace.c 第 417 行定义.

{
    if (g_traceState == TRACE_UNINIT) {
        TRACE_ERROR("trace not inited, be sure LOS_TraceInit excute success\n");
        return;
    }
 
    OsTraceReset();
}

函数调用图:

这是这个函数的调用关系图:

◆ LOS_TraceStart()

UINT32 LOS_TraceStart ( VOID )

Start trace.

Description:: This API is used to start trace.

注意

Start trace

参数

None.

返回值

#LOS_ERRNO_TRACE_ERROR_STATUS	0x02001400: Trace start failed.
#LOS_OK	0x00000000: Trace start success.

Dependency:

los_trace.h: the header file that contains the API declaration.

参见: LOS_TraceStart

Start trace.

在文件 los_trace.c 第 353 行定义.

{
    UINT32 intSave;
    UINT32 ret = LOS_OK;
 
    TRACE_LOCK(intSave);
    if (g_traceState == TRACE_STARTED) {
        goto START_END;
    }
 
    if (g_traceState == TRACE_UNINIT) {//必须初始化好
        TRACE_ERROR("trace not inited, be sure LOS_TraceInit excute success\n");
        ret = LOS_ERRNO_TRACE_ERROR_STATUS;
        goto START_END;
    }
 
    OsTraceNotifyStart();//通知系统开始
 
    g_enableTrace = TRUE; //使能trace功能
    g_traceState = TRACE_STARTED;//设置状态,已开始
 
    TRACE_UNLOCK(intSave);
    LOS_TRACE(MEM_INFO_REQ, m_aucSysMem0);//输出日志
    return ret;
START_END:
    TRACE_UNLOCK(intSave);
    return ret;
}

这是这个函数的调用关系图:

◆ LOS_TraceStop()

VOID LOS_TraceStop ( VOID )

Stop trace.

Description:: This API is used to stop trace.

注意

Stop trace

参数

None.

返回值

#None.

Dependency:

los_trace.h: the header file that contains the API declaration.

参见: LOS_TraceStop

Stop trace.

在文件 los_trace.c 第 382 行定义.

{
    UINT32 intSave;
 
    TRACE_LOCK(intSave);
    if (g_traceState != TRACE_STARTED) {
        goto STOP_END;
    }
 
    g_enableTrace = FALSE;
    g_traceState = TRACE_STOPED;
    OsTraceNotifyStop();
STOP_END:
    TRACE_UNLOCK(intSave);
}

这是这个函数的调用关系图:

◆ OsTraceDataEncode()

UINT32 OsTraceDataEncode	(	UINT8	type,
		const TlvTable *	table,
		UINT8 *	src,
		UINT8 *	dest,
		INT32	destLen
	)

Encode trace raw data.

Description:: This API is used to encode trace raw data to tlv data.

注意

Encade trace data

参数

type	[IN] Type UINT8. The type stands for different struct of src data.
src	[IN] Type UINT8 *. The raw trace data.
table	[IN] Type #const TlvTable *. The tlv table descript elemOffset and elemSize.
dest	[OUT] Type UINT8 *. The tlv data.
destLen	[IN] Type UINT8 *. The tlv buf max len.

返回值

#0	convert failed.
UINT32	convert success bytes.

Dependency:

trace_tlv.h: the header file that contains the API declaration.

参见: OsTraceDataEncode

对trace数据进行 Tlv 编码

TLV 是一种可变的格式，其中：

T 可以理解为 Tag 或 Type ，用于标识标签或者编码格式信息； L 定义数值的长度； V 表示实际的数值。 T 和 L 的长度固定，一般是2或4个字节，V 的长度由 Length 指定。

要正确的解析对方发来的数据除了统一数据格式之外还要统一字节序。字节序是指多字节数据在计算机内存中存储或者网络传输时各字节的存储顺序。字节序一般分为大端和小端。

大端模式（Big-Endian）：高位字节放在内存的低地址端，低位字节排放在内存的高地址端。小端模式（Little-Endian）：低位字节放在内存的低地址端，高位字节放在内存的高地址端。

使用 htonl 将 Tag（或Type）转成网络字节序，指针偏移 4；使用 htonl 将 Length 转成网络字节序，指针偏移 4；若值 Value 为 int、char、short、long 类型，将其转为网络字节序，指针偏移；若值为字符串，写入后指针偏移 Length；重复上述三步，继续编码后面的 TLV 单元。

在文件 trace_tlv.c 第 115 行定义.

{
    UINT16 crc;
    INT32 len;
    INT32 tlvBufLen;
    UINT8 *tlvBuf = NULL;
 
    TraceMsgTlvHead *head = (TraceMsgTlvHead *)dest;
    tlvBufLen = destLen - sizeof(TraceMsgTlvHead);
 
    if ((tlvBufLen <= 0) || (table == NULL)) {
        return 0;
    }
 
    tlvBuf = dest + sizeof(TraceMsgTlvHead);
    len = OsTlvEncode(table, src, tlvBuf, tlvBufLen);
    crc = CalcCrc16(tlvBuf, len);
 
    head->magicNum = TRACE_TLV_MSG_HEAD;
    head->msgType  = type;
    head->len      = len;
    head->crc      = crc;
    return len + sizeof(TraceMsgTlvHead);
}

函数调用图:

这是这个函数的调用关系图:

结构体

类型定义

枚举

函数

详细描述

类型定义说明

◆ TRACE_HWI_FILTER_HOOK

枚举类型说明

◆ LOS_TRACE_MASK

◆ LOS_TRACE_TYPE

◆ TraceState

函数说明

◆ LOS_TraceEventMaskSet()

◆ LOS_TraceHwiFilterHookReg()

◆ LOS_TraceRecordDump()

◆ LOS_TraceRecordGet()

◆ LOS_TraceReset()

◆ LOS_TraceStart()

◆ LOS_TraceStop()

◆ OsTraceDataEncode()