memory - 在 VB6 应用程序中识别内存占用的工具

Question

有哪些工具可用于将 VB6 应用程序中的内存消耗归因于它的多个组件？我可以通过查看各种计数器(私有(private)字节、工作集等)来获取整个应用程序消耗的内存，例如，在 Process Explorer 中。我想更深入地了解运行时创建的各种组件或对象消耗了多少内存。例如，计算在运行时缓存数据的大型集合消耗了多少内存，以及它如何根据集合中元素的数量而变化。

Answer 1

我最喜欢的工具必须是 DevPartner，虽然它的价格为 1,500 英镑，但并不便宜。虽然它比内存泄漏检查要多得多，但如果这就是你所需要的，你可能是地毯式轰炸 Ant 。

如果您想查看您的应用是否正确释放资源，请使用我编写的此函数将内存转储到给定位置。我将首先缓存每个变量的地址，然后在关闭时调用 DumpVariableMemory 传递对这些位置的引用，以查看它们是否已被释放。

如果您还没有，您还需要添加一个声明 fopr CopyMemory :)

    Public Function DumpVariableMemory(ByVal lngVariablePointer&, _
                                   ByVal lngBufferSizeInBytes&) As String
    '' * Object Name:   DumpVariableMemory
    '' * Type:          Function
    '' * Purpose:       Returns a memory dump of the variable or pointer location
    '' * Created:       21/08/2006 - 17:41:32
    '' * Coder:         Richard Pashley - NUPUK00008148
    '' * Build Machine: W-XPRP-77
    '' * Encapsulation: Full
    '' * Parameters:    lngVariablePointer      -   Long    -   Pointer to the data to dump
    '' *                lngBufferSizeInBytes    -   Long    -   Size of the dump to ouput in bytes
    '' * Returns:       -                       -   String  -   Memory dump output as a string
    '' *                This will dump the memory location starting at the pointer address and
    '' *                ending at the address plus the offset (lngBufferSizeInBytes).
    '' *                You can use LenB to determine the size of the variable for the
    '' *                lngBufferSizeInBytes parameter if required.
    '' *                Example: DebugPrint DumpVariableMemory(VarPtr(lngMyLongValue),LenB(lngMyLongValue)
    '' * Modified By:   [Name]
    '' * Date:          [Date]
    '' * Reason:        [NUPUKxxxxxxxxx]
    '' Declare locals
    Dim lngBufferIterator&                  '' Buffer iterator
    Dim lngBufferInnerIterator&             '' Buffer loop inner iterator
    Dim bytHexDumpArray() As Byte           '' Received output buffer
    Dim strDumpBuffer$                      '' Formatted hex dump construction buffer
    Dim lngValidatedBufferSize&             '' Validated passed buffer size
    '' Turn on error handling
    On Error GoTo DumpVariableMemory_Err
    '' Resize output buffer
    ReDim bytHexDumpArray(0 To lngBufferSizeInBytes - 1) As Byte
    '' Retrieve memory contents from supplied pointer
    Call CopyMemory(bytHexDumpArray(0), _
       ByVal lngVariablePointer, _
       lngBufferSizeInBytes)
    '' Format dump header
    strDumpBuffer = String(81, "=") & vbCrLf & _
       "Pointer Address = &h" & Hex$(lngVariablePointer) & _
       "   Ouput Buffer Size = " & FormatBytes(lngBufferSizeInBytes)
    '' Add header seperator
    strDumpBuffer = strDumpBuffer & _
       vbCrLf & String(81, Chr$(61))
    '' Validate buffer dimensions
    If lngBufferSizeInBytes Mod 16 = 0 Then
        '' Validated ok so assign
        lngValidatedBufferSize = lngBufferSizeInBytes
    Else
        '' Refactor to base 16
        lngValidatedBufferSize = _
           ((lngBufferSizeInBytes \ 16) + 1) * 16
    End If
    '' Iterate through buffer contents
    For lngBufferIterator = 0 To (lngValidatedBufferSize - 1)
        '' Determine if first row
        If (lngBufferIterator Mod 16) = 0 Then
            '' Format dump output row
            strDumpBuffer = strDumpBuffer & vbCrLf & Right$(String(8, Chr$(48)) _
               & Hex$(lngVariablePointer + lngBufferIterator), 8) & Space(2) & _
               Right$(String(4, Chr$(48)) & Hex$(lngBufferIterator), 4) & Space(2)
        End If
        '' Determine required dump buffer padding
        If lngBufferIterator < lngBufferSizeInBytes Then
            '' Pad dump buffer
            strDumpBuffer = strDumpBuffer & Right$(Chr$(48) & _
               Hex(bytHexDumpArray(lngBufferIterator)), 2)
        Else
            '' Pad dump buffer
            strDumpBuffer = strDumpBuffer & Space(2)
        End If
        '' Determine required dump buffer padding
        If (lngBufferIterator Mod 16) = 15 Then
            '' Pad dump buffer
            strDumpBuffer = strDumpBuffer & Space(2)
            '' Iterate through buffer row
            For lngBufferInnerIterator = (lngBufferIterator - 15) To lngBufferIterator
                '' Validate row width
                If lngBufferInnerIterator < lngBufferSizeInBytes Then
                    '' Validate buffer constraints
                    If bytHexDumpArray(lngBufferInnerIterator) >= 32 And _
                       bytHexDumpArray(lngBufferInnerIterator) <= 126 Then
                        '' Ouput data to dump buffer row
                        strDumpBuffer = strDumpBuffer & _
                           Chr$(bytHexDumpArray(lngBufferInnerIterator))
                    Else
                        '' Pad dump buffer
                        strDumpBuffer = strDumpBuffer & Chr$(45)
                    End If
                End If
            Next
            '' Determine required dump buffer padding
        ElseIf (lngBufferIterator Mod 8) = 7 Then
            '' Pad dump buffer
            strDumpBuffer = strDumpBuffer & Chr$(45)
        Else
            '' Pad dump buffer
            strDumpBuffer = strDumpBuffer & Space(1)
        End If
    Next
    '' Assign result to function output
    DumpVariableMemory = strDumpBuffer & _
       vbCrLf & String(81, Chr$(61)) & vbCrLf
Exit_Point:
    Exit Function
    '' Error Handling
DumpVariableMemory_Err:
    LogError "modNYFixLibrary.DumpVariableMemory", Err.Number, Err.Description
    DumpVariableMemory = String(81, Chr$(61)) & vbCrLf & _
       "DumpFailed!" & vbCrLf & String(81, Chr$(61))
    GoTo Exit_Point
    Resume
End Function