Process handle leakage
in [MFC]
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From: David Ching on 19 Dec 2009 09:02 "linuxfedora" <linuxfedora(a)yahoo.com.hk> wrote in message news:e23fb821-f01a-4ff1-ae02-4a8e83cc230a(a)d9g2000prh.googlegroups.com... > Thanks > > have used Process Explorer, it show > > Process myProgramName.exe(5800) > Process myProgramName.exe(5800) > Process myProgramName.exe(5800) > Process myProgramName.exe(5800) > Process myProgramName.exe(5800) > . I don't understand. It shows the same process 5 times (with the process id 5800)? I've never seen that. If you click on the Process column header (the leftmost one) it will cycle through a mode that indents the processes showing the parent hierarchy (i.e. which process started them.) Maybe you could look at that to figure out what process is starting all these processes. -- David
From: "Check Abdoul" checkabodul at mvps dot on 19 Dec 2009 10:00 Take a look at the following link that explains how to use !htrace command in Windbg to detect handle leaks. http://channel9.msdn.com/posts/jeff_dailey/Understanding-handle-leaks-and-how-to-use-htrace-to-find-them/ Also you should be able to use AppVerifier to detect handle and memory leaks http://technet.microsoft.com/en-us/library/bb457063.aspx Cheers Check Abdoul "linuxfedora" <linuxfedora(a)yahoo.com.hk> wrote in message news:49e89e61-65d2-4d71-8c5a-895f14e09ee3(a)h14g2000pri.googlegroups.com... > Hi All, > > My program is written by MFC with many thread created for processing. > > And i found that the Handle count in the Task manager of my program > will increase after a long run. And i have tried to use WinDbg to > check what kind of handle is increasing, and it was Process, but in my > source code, i cannot find any function call like CreateProcess, and > since my program is quite big, so i would like to know what kinds of > API will create Process handle to make me more easy to find the > problem. > > And i have checked that when the handle is increasing, no CreateThread > is called. So any sugguestion for me. Thanks > > Thanks. > > Best regards, > FAI
From: linuxfedora on 20 Dec 2009 20:55 On 12æ19æ¥, ä¸å11æ00å, "Check Abdoul" <checkabodul at mvps dot org> wrote: > Take a look at the following link that explains how to use !htrace command > in Windbg to detect handle leaks. > >   http://channel9.msdn.com/posts/jeff_dailey/Understanding-handle-leaks... > > Also you should be able to use AppVerifier to detect handle and memory leaks >   http://technet.microsoft.com/en-us/library/bb457063.aspx > > Cheers > Check Abdoul > > "linuxfedora" <linuxfed...(a)yahoo.com.hk> wrote in message > > news:49e89e61-65d2-4d71-8c5a-895f14e09ee3(a)h14g2000pri.googlegroups.com... > > > Hi All, > > > My program is written by MFC with many thread created for processing. > > > And i found that the Handle count in the Task manager of my program > > will increase after a long run. And i have tried to use WinDbg to > > check what kind of handle is increasing, and it was Process, but in my > > source code, i cannot find any function call like CreateProcess, and > > since my program is quite big, so i would like to know what kinds of > > API will create Process handle to make me more easy to find the > > problem. > > > And i have checked that when the handle is increasing, no CreateThread > > is called. So any sugguestion for me. Thanks > > > Thanks. > > > Best regards, > > FAI > > I dont understand what are their meaning.. !handle 0 ff Process Handle 65fc Type Process Attributes 0 GrantedAccess 0x1f0fff: Delete,ReadControl,WriteDac,WriteOwner,Synch Terminate,CreateThread,,VMOp,VMRead,VMWrite,DupHandle,CreateProcess,SetQuota,SetInfo,QueryInfo,SetPort HandleCount 1287 PointerCount 1943 Name <none> Object Specific Information Process Id 5408 Parent Process 1640 Base Priority 8 !handle -diff Handle = 0x00005de0 - OPEN Thread ID = 0x00001040, Process ID = 0x00001520 0x771031d2: oleaut32!DllGetClassObject+0x000009a5 0x77102cac: oleaut32!DllGetClassObject+0x0000047f 0x769de342: ole32!CoUnmarshalInterface+0x00000b4e 0x769ddfc3: ole32!CoUnmarshalInterface+0x000007cf -------------------------------------- Handle = 0x000053d8 - OPEN Thread ID = 0x00001040, Process ID = 0x00001520 0x771031d2: oleaut32!DllGetClassObject+0x000009a5 0x77102cac: oleaut32!DllGetClassObject+0x0000047f 0x769de342: ole32!CoUnmarshalInterface+0x00000b4e 0x769ddfc3: ole32!CoUnmarshalInterface+0x000007cf -------------------------------------- Handle = 0x0000574c - OPEN Thread ID = 0x00001040, Process ID = 0x00001520 0x771031d2: oleaut32!DllGetClassObject+0x000009a5 0x77102cac: oleaut32!DllGetClassObject+0x0000047f 0x769de342: ole32!CoUnmarshalInterface+0x00000b4e 0x769ddfc3: ole32!CoUnmarshalInterface+0x000007cf
From: linuxfedora on 20 Dec 2009 20:57 On 12æ19æ¥, ä¸å11æ00å, "Check Abdoul" <checkabodul at mvps dot org> wrote: > Take a look at the following link that explains how to use !htrace command > in Windbg to detect handle leaks. > >   http://channel9.msdn.com/posts/jeff_dailey/Understanding-handle-leaks... > > Also you should be able to use AppVerifier to detect handle and memory leaks >   http://technet.microsoft.com/en-us/library/bb457063.aspx > > Cheers > Check Abdoul > > "linuxfedora" <linuxfed...(a)yahoo.com.hk> wrote in message > > news:49e89e61-65d2-4d71-8c5a-895f14e09ee3(a)h14g2000pri.googlegroups.com... > > > Hi All, > > > My program is written by MFC with many thread created for processing. > > > And i found that the Handle count in the Task manager of my program > > will increase after a long run. And i have tried to use WinDbg to > > check what kind of handle is increasing, and it was Process, but in my > > source code, i cannot find any function call like CreateProcess, and > > since my program is quite big, so i would like to know what kinds of > > API will create Process handle to make me more easy to find the > > problem. > > > And i have checked that when the handle is increasing, no CreateThread > > is called. So any sugguestion for me. Thanks > > > Thanks. > > > Best regards, > > FAI > > !handle 0 ff Process Handle 65fc Type Process Attributes 0 GrantedAccess 0x1f0fff: Delete,ReadControl,WriteDac,WriteOwner,Synch Terminate,CreateThread,,VMOp,VMRead,VMWrite,DupHandle,CreateProcess,SetQuota,SetInfo,QueryInfo,SetPort HandleCount 1287 PointerCount 1943 Name <none> Object Specific Information Process Id 5408 Parent Process 1640 Base Priority 8 !handle -diff Handle = 0x00005de0 - OPEN Thread ID = 0x00001040, Process ID = 0x00001520 0x771031d2: oleaut32!DllGetClassObject+0x000009a5 0x77102cac: oleaut32!DllGetClassObject+0x0000047f 0x769de342: ole32!CoUnmarshalInterface+0x00000b4e 0x769ddfc3: ole32!CoUnmarshalInterface+0x000007cf -------------------------------------- Handle = 0x000053d8 - OPEN Thread ID = 0x00001040, Process ID = 0x00001520 0x771031d2: oleaut32!DllGetClassObject+0x000009a5 0x77102cac: oleaut32!DllGetClassObject+0x0000047f 0x769de342: ole32!CoUnmarshalInterface+0x00000b4e 0x769ddfc3: ole32!CoUnmarshalInterface+0x000007cf -------------------------------------- Handle = 0x0000574c - OPEN Thread ID = 0x00001040, Process ID = 0x00001520 0x771031d2: oleaut32!DllGetClassObject+0x000009a5 0x77102cac: oleaut32!DllGetClassObject+0x0000047f 0x769de342: ole32!CoUnmarshalInterface+0x00000b4e 0x769ddfc3: ole32!CoUnmarshalInterface+0x000007cf
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