有哪些工具可以将VB6应用程序中的内存消耗归因于它的多个组件? 我可以通过观察各种计数器(专用字节,工作集等)来获取整个应用程序所消耗的内存,例如,在Process Explorer中。我希望比这更深入,并了解在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的元素数量进行更改。
答案 0 :(得分:5)
我最喜欢的工具必须是DevPartner,虽然价格为1,500英镑但并不便宜。它确实比内存泄漏检查还要多得多,但如果这就是你所需要的,那么你可能就是地毯式炸弹蚂蚁。
如果您想查看您的应用是否正确释放资源,请使用我编写的函数将内存转储到给定位置。我会先缓存每个变量的地址,然后在关机时调用DumpVariableMemory传入对这些位置的引用,看看它们是否已经被释放。
如果你还没有,你也需要添加一个声明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
答案 1 :(得分:2)
我不确定任何公开的(免费)工具会将VB6代码分析到模块级别。有几种内存分析器可用于C / C ++和.NET,但在我看到的VB6上并不多。看起来这个领域的所有旧供应商(IBM Purify,Compuware Devpartner / Boundschecker)都已被买断,或仅转移到.NET支持。
您可以尝试GlowCode。它声明了C ++支持,但也强调了Win32原生x86映像。
Microsoft发布DebugDiag,它支持.NET或Win32的内存泄漏检测,但我从未在VB中使用过它。它可能没有显示出对模块级别的未完成分配,但我敢打赌它至少会归因于哪些库/ dll分配了最多的内存。
答案 2 :(得分:2)
Memory Validator可以告诉你在VB6程序(以及C ++,C,Delphi,Fortran 95 ......)中分配(和泄露)内存的位置。
答案 3 :(得分:1)
MS站点上有另一个名为processmonitor.exe的工具。它会报告每个请求调用,您可以使用其过滤功能仅监视应用程序的进程请求。