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我正在使用在 Microsoft 网站上找到的以下代码。它编译成功并输出一个日志文件，因为它应该：

#include "stdafx.h"

#define INITGUID  // Include this #define to use SystemTraceControlGuid in Evntrace.h.

#include <windows.h>
#include <stdio.h>
#include <conio.h>
#include <strsafe.h>
#include <wmistr.h>
#include <evntrace.h>

#define LOGFILE_PATH L"C:\\Documents and Settings\\Administrator\\My Documents\\My Dropbox\\Log.etl"

void wmain(void)
{

    ULONG status = ERROR_SUCCESS;
    TRACEHANDLE SessionHandle = 0;
    EVENT_TRACE_PROPERTIES* pSessionProperties = NULL;
    ULONG BufferSize = 0;

    // Allocate memory for the session properties. The memory must
    // be large enough to include the log file name and session name,
    // which get appended to the end of the session properties structure.

    BufferSize = sizeof(EVENT_TRACE_PROPERTIES) + sizeof(LOGFILE_PATH) + sizeof(KERNEL_LOGGER_NAME);
    pSessionProperties = (EVENT_TRACE_PROPERTIES*) malloc(BufferSize);    
    if (NULL == pSessionProperties)
    {
        wprintf(L"Unable to allocate %d bytes for properties structure.\n", BufferSize);

        goto cleanup;
    }

    // Set the session properties. You only append the log file name
    // to the properties structure; the StartTrace function appends
    // the session name for you.

    ZeroMemory(pSessionProperties, BufferSize);
    pSessionProperties->Wnode.BufferSize = BufferSize;
    pSessionProperties->Wnode.Flags = WNODE_FLAG_TRACED_GUID;
    pSessionProperties->Wnode.ClientContext = 1; //QPC clock resolution
    pSessionProperties->Wnode.Guid = SystemTraceControlGuid; 
    pSessionProperties->EnableFlags = EVENT_TRACE_FLAG_CSWITCH;
    pSessionProperties->LogFileMode = EVENT_TRACE_FILE_MODE_CIRCULAR;
    pSessionProperties->MaximumFileSize = 5;  // 5 MB
    pSessionProperties->LoggerNameOffset = sizeof(EVENT_TRACE_PROPERTIES);
    pSessionProperties->LogFileNameOffset = sizeof(EVENT_TRACE_PROPERTIES) + sizeof(KERNEL_LOGGER_NAME); 
    StringCbCopy((LPWSTR)((char*)pSessionProperties + pSessionProperties->LogFileNameOffset), sizeof(LOGFILE_PATH), LOGFILE_PATH);

    // Create the trace session.

    status = StartTrace((PTRACEHANDLE)&SessionHandle, KERNEL_LOGGER_NAME, pSessionProperties);

    if (ERROR_SUCCESS != status)
    {
        if (ERROR_ALREADY_EXISTS == status)
        {
            wprintf(L"The NT Kernel Logger session is already in use.\n");
        }
        else
        {
            wprintf(L"EnableTrace() failed with %lu\n", status);
            getchar();
        }

        goto cleanup;
    }

    wprintf(L"Press any key to end trace session ");
    _getch();

cleanup:

    if (SessionHandle)
    {
        status = ControlTrace(SessionHandle, KERNEL_LOGGER_NAME, pSessionProperties, EVENT_TRACE_CONTROL_STOP);

        if (ERROR_SUCCESS != status)
        {
            wprintf(L"ControlTrace(stop) failed with %lu\n", status);
        }
    }

    if (pSessionProperties)
        free(pSessionProperties);
}

我想知道是否有办法修改此代码以使其在检测到上下文切换时打印时间戳。有人有想法么？

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