我的应用程序遇到了一个奇怪的问题,它的内存使用量一下子不断上升几百兆,最终应用程序冻结了.该应用程序是用Delphi编写的,它使用数据库,COM(用于OPC)和TCP / IP.
使用FastMM,我已经关注了内存使用情况的屏幕截图.我不完全确定如何读取该表,但看起来有些东西已经分配了296463552个字节(0x100fb000,这是“幻数”？)三次.
有任何想法吗？有没有办法跟踪非Delphi-MM内存分配？
我正在使用Delphi 2007和FastMM 4.96.
编辑：
我使用IMallocSpy编写了一个小助手类来跟踪COM内存分配.这是我得到的摘录：
00119023 5:52:27.484 [4496] TCOMAllocSpy.PreRealloc size: 269462304
00119024 5:52:27.734 [4496] (0002760C){ntdll.dll } [7C82860C] KiFastSystemCallRet + $0
00119025 5:52:27.734 [4496] (0009F83A){MyApp.exe} [004A083A] JclDebug.JclCreateThreadStackTrace (Line 3943,"JclDebug.pas" + 7) + $1E
00119026 5:52:27.734 [4496] (003D496A){MyApp.exe} [007D596A] ComLeakHelper.TCOMAllocSpy.DebugStack (Line 46,"ComLeakHelper.pas" + 2) + $9
00119027 5:52:27.734 [4496] (003D4B52){MyApp.exe} [007D5B52] ComLeakHelper.TCOMAllocSpy.PreRealloc (Line 125,"ComLeakHelper.pas" + 4) + $2
00119028 5:52:27.734 [4496] (000053B6){MyApp.exe} [004063B6] System.@WStrAsg (Line 14090,"sys\system.pas" + 10) + $0
00119029 5:52:27.734 [4496] (002E4490){MyApp.exe} [006E5490] DBXCommon.TDBXCommand.SetText (Line 5304,"..\..\..\..\..\src\pas\dbx\driver\DBXCommon.pas" + 13) + $5
00119030 5:52:27.734 [4496] (0010A340){MyApp.exe} [0050B340] WideStrings.TWideStrings.GetValue (Line 580,"common\WideStrings.pas" + 3) + $D
00119031 5:52:27.734 [4496] (002E1AFC){MyApp.exe} [006E2AFC] DBXCommon.TDBXProperties.GetValue (Line 4046,"..\..\..\..\..\src\pas\dbx\driver\DBXCommon.pas" + 1) + $7
00119032 5:52:27.734 [4496] (002E3FC9){MyApp.exe} [006E4FC9] DBXCommon.TDBXConnectionEx.GetProductName (Line 5071,"..\..\..\..\..\src\pas\dbx\driver\DBXCommon.pas" + 1) + $E
00119033 5:52:27.734 [4496] (003765FA){MyApp.exe} [007775FA] sqlExpr.TsqlConnection.DoConnect (Line 2467,"..\..\..\..\..\src\pas\dbx\vcl\sqlExpr.pas" + 66) + $21
00119034 5:52:27.734 [4496] (0011876D){MyApp.exe} [0051976D] DB.TCustomConnection.SetConnected (Line 2628,"DB.pas" + 8) + $4
00119035 5:52:27.734 [4496] (00118728){MyApp.exe} [00519728] DB.TCustomConnection.Open (Line 2611,"DB.pas" + 0) + $4
00119036 5:52:27.734 [4496] (00375D6F){MyApp.exe} [00776D6F] sqlExpr.TsqlConnection.CheckConnection (Line 2302,"..\..\..\..\..\src\pas\dbx\vcl\sqlExpr.pas" + 4) + $2
00119037 5:52:27.734 [4496] (00379241){MyApp.exe} [0077A241] sqlExpr.TCustomsqlDataSet.CheckConnection (Line 3955,"..\..\..\..\..\src\pas\dbx\vcl\sqlExpr.pas" + 2) + $2
00119038 5:52:27.734 [4496] (0037968A){MyApp.exe} [0077A68A] sqlExpr.TCustomsqlDataSet.OpenCursor (Line 4045,"..\..\..\..\..\src\pas\dbx\vcl\sqlExpr.pas" + 3) + $4
00119039 5:52:27.734 [4496] (00125EA9){MyApp.exe} [00526EA9] DB.TDataSet.SetActive (Line 9245,"DB.pas" + 12) + $7
00119040 5:52:27.734 [4496] (00125CA1){MyApp.exe} [00526CA1] DB.TDataSet.Open (Line 9201,"DB.pas" + 1) + $6
...
所以,问题似乎是在数据库连接中.我正在使用来自Upscene的Firebird 2.1,DBExpress和InterXpress for Firebird驱动程序.
EDIT2：
这似乎分析了类似的问题,至少重点在于这里：http://www.yac.com.pl/mt.texts.sqlexpr-2.en.html
解决方法
问题是Delphi 2007 DbExpress中存在多线程环境中的错误(毕竟它不是线程安全的).更多信息：
http://www.yac.com.pl/mt.texts.sqlexpr-2.en.html