sample_trace.c

/* ----------------------------------------------------------------------------
 * Copyright (c) Huawei Technologies Co., Ltd. 2020-2020. All rights reserved.
 * Description: LiteOS Trace sample code
 * Author: Huawei LiteOS Team
 * Create: 2020-08-31
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific prior written
 * permission.
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * --------------------------------------------------------------------------- */

#include "los_trace.h"

#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */

UINT32 g_traceTestTaskId;
VOID Example_Trace(VOID)
{
    UINT32 ret;

    LOS_TaskDelay(10);

    /* 开启trace */
    ret = LOS_TraceStart();
    if (ret != LOS_OK) {
        dprintf("trace start error\n");
        return;
    }

    /* 触发任务切换的事件 */
    LOS_TaskDelay(1);

    LOS_TaskDelay(1);

    LOS_TaskDelay(1);

    /* 停止trace */
    LOS_TraceStop();

    LOS_TraceRecordDump(FALSE);
}

UINT32 Example_Trace_test(VOID)
{
    UINT32 ret;
    TSK_INIT_PARAM_S traceTestTask;

    /* 创建用于trace测试的任务 */
    memset(&traceTestTask, 0, sizeof(TSK_INIT_PARAM_S));
    traceTestTask.pfnTaskEntry = (TSK_ENTRY_FUNC)Example_Trace;
    traceTestTask.pcName       = "TestTraceTsk";    /* 测试任务名称 */
    traceTestTask.uwStackSize  = 0x800;
    traceTestTask.usTaskPrio   = 5;
    traceTestTask.uwResved   = LOS_TASK_STATUS_DETACHED;
    ret = LOS_TaskCreate(&g_traceTestTaskId, &traceTestTask);
    if(ret != LOS_OK){
        dprintf("TraceTestTask create failed .\n");
        return LOS_NOK;
    }

    /* 系统默认情况下已启动trace, 因此可先关闭trace后清除缓存区后，再重启trace */
    LOS_TraceStop();
    LOS_TraceReset();

    /* 开启任务模块事件记录 */
    LOS_TraceEventMaskSet(TRACE_TASK_FLAG);

    return LOS_OK;
}

#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */