I am working on a video processing project using Qt and Opencv with Qt Creator IDE in Windows 7 32bit. I have been successful compiling and running my code. But when I close the gui of my application Windows pops up an error :
MyProgram.exe has stopped working
Problem signature:
Problem Event Name: APPCRASH
Application Name: QtTracker3.exe
Application Version: 0.0.0.0
Application Timestamp: 5107b5da
Fault Module Name: ntdll.dll
Fault Module Version: 6.1.7600.16695
Fault Module Timestamp: 4cc7ab44
Exception Code: c0000005
Exception Offset: 00052073
OS Version: 6.1.7600.2.3.0.256.1
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789
I am not a professional programmer and I need not to know whether this happens because my poor programming skills or something else..
Exception code c0000005 is an access violation, also known as general protection fault. The program is reading from, or writing to, an address which is not part of the virtual address space. A very common cause is that you are de-referencing a stale pointer. In other words, the pointer was once valid, but you have subsequently freed it. Then later when you attempt to access it, an exception is raised.
The exception is faulting in ntdll.dll which is a system DLL. That means that something in your program is passing invalid data to a system API.
In order to solve this problem you will likely need to run under the debugger and let the debugger break at the point in the code where the exception occurs. Then you can attempt to work out why the memory that is being accessed is invalid.
That's something that you can do, but we cannot. You have the code, we do not. So, we can't give you any more help than this. In any case, there's no need to despair–these problems are usually easy enough to solve with the help of a debugger.
Sometimes delete the contents of your build directory and try to compile again just to make sure nothing is caching.
Related
I'm working on an app in VS 2010 on wind2008. It's a .Net 3.5 app that use .Net 2.0 library.
I change all Frameworks to 3.5 .Net and uncheck "Enable the visual studio hosting process"
But When I debug my solution I got this error :
Problem signature:
Problem Event Name: APPCRASH
Application Name: AnalyseFarm.exe
Application Version: 1.0.0.0
Application Timestamp: 5326f157
Fault Module Name: KERNELBASE.dll
Fault Module Version: 6.1.7600.16385
Fault Module Timestamp: 4a5bdfe0
Exception Code: c000041d
Exception Offset: 000000000000aa7d
OS Version: 6.1.7600.2.0.0.274.10
Locale ID: 1036
Additional Information 1: 5ecb
Additional Information 2: 5ecbd308407466ba89616cb69c9e62d8
Additional Information 3: 9ac0
Additional Information 4: 9ac06af1219db569f0ee193c24745b31
any idea , beast regards
Exception Code: c000041d
This tells the tale, that's STATUS_FATAL_USER_CALLBACK_EXCEPTION, "An unhandled exception was encountered during a user callback". Your program threw an exception and it wasn't handled. Which normally automatically breaks into the debugger and displays the Exception Assistant.
However, the exception occurred at a very awkward time, just when the operating system was in a state where it cannot afford to go through the normal rigamarole that it goes through when a thread dies with an exception. This kind of mishap usually occurs when the callback was triggered by 32-bit code but the exception occurred in 64-bit code, there's no good mechanism to marshal 64-bit exceptions back into 32-bit code, the exception information cannot be properly interpreted by such code since it includes 64-bit pointer values. Or the other way around. Windows messages generated by the window manager tend to fall in this category. Beware that this is just a rough guess at the reason, you need to find the real one.
You do so by forcing the debugger to stop at the code where the exception is thrown, before the operating system is asked to deal with it. Use the Debug + Exceptions dialog, tick the Thrown checkboxes to force the debugger to stop at the throw location.
Please forgive my ignorance, but I am not familiar with Visual Studio or Windows DLLs & services. Normally I work in an embedded environment but somehow (just lucky I guess) I got selected to troubleshoot a crash that occurred in one of our Windows services, well actually in MSVCR80.DLL, but which I must presume was caused by our service (Windows event log below)
Faulting application name: MySrvc.exe, version: 0.0.0.0, time stamp: 0x4fee02e5
Faulting module name: MSVCR80.dll, version: 8.0.50727.4940, time stamp: 0x4ca2b271
Exception code: 0xc000000d
Fault offset: 0x00008aa0
The trouble I'm having is that when I attach to the process and then get it to crash, the debugger breaks and then the call stack only has some calls within mscvr80.dll and ntdll.dll and that's it, no calls from our service into those libraries. My guess is that the library is multi-threaded and the stack I'm seeing is just one of it's threads. But when the VS debugger breaks, does it not pause all threads? And is there a way to examine the call stacks of the other threads? Or am I completely off base here?
Again, please forgive my ignorance in this area. Any advice or direction you can offer will be greatly appreciated. Thanks in advance!
-H
There are two possibilities:
You're looking at the wrong thread, as you say, in which case you can switch to the right one using the Threads window, via Debug / Windows / Threads. (But that's unlikely - when a thread crashes, VS will show you that thread.)
You need to load the symbols for the system DLLs - Visual Studio sometimes can't follow stack traces without the symbols. Go to Tools / Options / Debugging / Symbols and make sure you're obtaining symbols from Microsoft.
I can change one small thing commenting/un-commenting it and VS2005 will either crash or not crash for no additional reason in either case.
Problem signature:
Problem Event Name: APPCRASH
Application Name: devenv.exe
Application Version: 8.0.50727.867
Application Timestamp: 45d2c842
Fault Module Name: StackHash_0646
Fault Module Version: 6.1.7601.17725
Fault Module Timestamp: 4ec49b8f
Exception Code: c0000374
Exception Offset: 000ce6c3
OS Version: 6.1.7601.2.1.0.256.4
Locale ID: 1033
Additional Information 1: 0646
Additional Information 2: 06468f0034e46fb7e5e65a0a8a306ffb
Additional Information 3: 9aba
Additional Information 4: 9abaaa502ccb3837971bddc9d127747d
Since the above is really of no help to me, is there some way I can diagnose what's going on? All I'm able to get out of debugging the compile crash (in VS2005) that is that there is a corrupted heap.
Some options you can try out:
You can get a log when booting Visual Studio using /log as attribute.
http://msdn.microsoft.com/en-us/library/vstudio/ms241272(v=vs.80).aspx
Creating a crash dump
http://blogs.msdn.com/b/mikhailarkhipov/archive/2006/07/25/678308.aspx
Uninstall ReSharpen (if you use it)
Reinstall Visual Studio
Create a new Windows User and see if you get the same trouble
Ehh.. Solution: Get rid of the outdated buggy IDE and upgrade to a more recent one. Went to VSC15. No crashes since.
Short Q.: What does this exception mean? "EXC_BAD_ACCESS (0x0001)"
Full Q.: How can I use this error log info (and thread particulars that I omitted here) to diagnosis this app crash? (NB: I have no expertise with crash logs or OS kernels.)
In this case, my email client (Eudora) crashes immediately on launch, every time, after no apparent system changes.
Host Name: [name of Mac]
Date/Time: 2008-09-28 14:46:54.177 -0400
OS Version: 10.4.11 (Build 8S165)
Report Version: 4
Command: Eudora
Path: /Applications/[...]/Eudora Application Folder/Eudora.app/Contents/MacOS/Eudora
Parent: WindowServer [59]
Version: 6.2.4 (6.2.4)
PID: 231
Thread: 0
Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_PROTECTION_FAILURE (0x0002) at 0x00000001
To answer your short question: EXC_BAD_ACCESS means an illegal memory access. This means that the program tried to use a memory location outside its virtual address space (roughly speaking, the area of memory it has requested from the OS kernel). This is what Unix people typically call a "segmentation fault" (segfault), and what Windows people typically call an "access violation" (AV) or "general protection fault" (GPF). (Yes, you probably already knew that. But I'm just making sure...)
Does the crash report say what memory address was being referenced? Does the report include the call stack or a core dump? All three are very valuable, especially the core dump as you can load it into the debugger and restart the program right from the point of the exception. And if the memory address seems totally out of whack (in the higher half of the virtual address, or very close to 0, then you have a good clue where the problem lies).
Just to complete Michael's answer - analyzing the crash log is not what you are supposed to do. The eudora programmers screwed up (or the people providing the tools the eudora programmers use to make eudora). The best thing you can do is copy and paste the entire contents of the crash log in to a mail client (try MAIL, as you can't seem to use eudora, right now, hahaha), and send it to eudora-support#eudora.com along with a short description of what's happening. It's their job to figure out what went wrong.
When I log into a remote machine using ssh X11 forwarding, Vista pops up a box complaining about a process that died unexpectedly. Once I dismiss the box, everything is fine. So I really don't care if some process died. How do I get Vista to shut up about it?
Specifically, the message reads:
sh.exe has stopped working
So it's not ssh itself that died, but some sub-process.
The problem details textbox reads:
Problem signature:
Problem Event Name: APPCRASH
Application Name: sh.exe
Application Version: 0.0.0.0
Application Timestamp: 48a031a1
Fault Module Name: comctl32.dll_unloaded
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 4549bcb0
Exception Code: c0000005
Exception Offset: 73dc5b17
OS Version: 6.0.6000.2.0.0.768.3
Locale ID: 1033
Additional Information 1: fc4d
Additional Information 2: d203a7335117760e7b4d2cf9dc2925f9
Additional Information 3: 1bc1
Additional Information 4: 7bc0b00964c4a1bd48f87b2415df3372
Read our privacy statement:
http://go.microsoft.com/fwlink/?linkid=50163&clcid=0x0409
I notice the problem occurs when I use the -Y option to enable X11 forwarding in an X terminal under Vista.
The dialog box that pops up doesn't automatically gain focus, so pressing Enter serves no purpose. I have to wait for the box to appear, grab it with the mouse, and dismiss it. Even forcing the error to receive focus would be a step in the right direction.
Per DrPizza I have sent an email to the Cygwin mailing list. The trimmed down subject line represents my repeated attempts to bypass an over-aggressive spam filter and highlights the need for something like StackOverflow.
The problem is, the process didn't just die, it died unexpectedly. Sounds like there's a bug in your SSH client that Vista is pointing out.
I know this is going to be heresy for a cygwin user, but you could just use PuTTY instead.
What does unexpectedly mean in this context? Does it mean it core dumped or just exited non-zero?
It means it died with an unhandled exception, i.e. it crashed.
Fault Module Name: comctl32.dll_unloaded
Exception Code: c0000005
Something had triggered loading of comctl32.dll, but it was later unloaded.
c0000005 means 'access violation'. Probably something tried calling a function in the unloaded dll.
I agree with one of the cygwin commentators that it's possibly a bug in some antivirus program or "desktop enhancement" software. Video card companies like to inject their stuff into every process, too. It's easy to use comctl32.dll for things without realizing it, however.
Try downloading and installing WinDbg from Microsoft. http://www.microsoft.com/whdc/devtools/debugging/installx86.mspx Set it as the default JIT debugger "windbg.exe -I". Next time this happens you should get the nice debugger window pop up. Type "kv100" to get a stack trace. Look at the dlls listed in the calling path, there's a good chance one of them is the culprit.
If you see a dll that's not from Microsoft or Cygwin there, uninstall that application and see if the problem goes away. Otherwise, the Cygwin list might be interested in the stack trace.
Well, I don't know what the original problem was, but when I update Cygwin recently the error message stopped popping up.
My guess it that rebasing was necessary.