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QT deployed executable crashes on some computers

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  • hskoglundH hskoglund

    Have you tried running your app on the crashing PCs using the Remote Desktop? I.e. turning on the switch "Enable Remote Desktop" in Settings and then remotely running those PCs from your development PC using the Remote Desktop Client

    L Offline
    L Offline
    Lati
    wrote on last edited by Lati
    #10

    @hskoglund I use remote desktop at all computers :) (though I tried directly using the computers as well)

    @SGaist , as I mentioned I also doubt about the graphic cards initially. But I tried on two computers with same specifications including graphic cards (GeForce 605) and both have now same nVidia drivers. And executable crashes only on one of them.

    Following is the event viewer log of the crash, maybe someone can take a hint:
    "Faulting application name: svchost.exe_TermService, version: 10.0.18362.1, time stamp: 0x32d6c210
    Faulting module name: ntdll.dll, version: 10.0.18362.267, time stamp: 0xc00f8a30
    Exception code: 0xc0000008
    Fault offset: 0x000000000009fe8a
    Faulting process ID: 0x5b8
    Faulting application start time: 0x01d5a2cd25825160
    Faulting application path: C:\WINDOWS\System32\svchost.exe
    Faulting module path: C:\WINDOWS\SYSTEM32\ntdll.dll
    Report ID: 9b7e234e-f934-4cd5-8ad2-6910fae80b34
    Faulting package full name:
    Faulting package-relative application ID: "

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #11

      @Lati said in QT deployed executable crashes on some computers:

      Faulting application name: svchost.exe_TermService

      From a quick look that might be network related. Are these computer configured exactly the same ? Connected on the same network ? Is your application using the network ?

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      L 1 Reply Last reply
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      • Christian EhrlicherC Online
        Christian EhrlicherC Online
        Christian Ehrlicher
        Lifetime Qt Champion
        wrote on last edited by
        #12

        If possible you should enable minidump creation on one of the computers so you can analyze it later on your system. See e.g. here on how to create them

        Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
        Visit the Qt Academy at https://academy.qt.io/catalog

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        • SGaistS SGaist

          @Lati said in QT deployed executable crashes on some computers:

          Faulting application name: svchost.exe_TermService

          From a quick look that might be network related. Are these computer configured exactly the same ? Connected on the same network ? Is your application using the network ?

          L Offline
          L Offline
          Lati
          wrote on last edited by Lati
          #13

          @SGaist, all computers are connected to the company network through LAN.

          I am using "webkit" and "webkitwidgets" might be related to the crash?

          @Christian-Ehrlicher, I will try that but it is not an easy process since I need permission from our system admin :/

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          • hskoglundH Online
            hskoglundH Online
            hskoglund
            wrote on last edited by hskoglund
            #14

            "Faulting application name: svchost.exe_TermService,.." means as @SGaist says, it's smells network related.

            Try walking up to the crashing PCs, pulling out the network plug and then test your app (but don't tell your system admin about the pulled plug :-)

            Edit: Exception code: 0xc0000008 I've seen that when remote debugging across a network, but you get that code also on a Release build?

            L 1 Reply Last reply
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            • hskoglundH hskoglund

              "Faulting application name: svchost.exe_TermService,.." means as @SGaist says, it's smells network related.

              Try walking up to the crashing PCs, pulling out the network plug and then test your app (but don't tell your system admin about the pulled plug :-)

              Edit: Exception code: 0xc0000008 I've seen that when remote debugging across a network, but you get that code also on a Release build?

              L Offline
              L Offline
              Lati
              wrote on last edited by
              #15

              @hskoglund I plugged out the network cable, no change (admin is on vacation, he will not realise that :))

              I tried again debug executable and I have now following error on the computer where it normally crashes:

              Annotation 2019-11-25 085822.png

              JonBJ 1 Reply Last reply
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              • L Lati

                @hskoglund I plugged out the network cable, no change (admin is on vacation, he will not realise that :))

                I tried again debug executable and I have now following error on the computer where it normally crashes:

                Annotation 2019-11-25 085822.png

                JonBJ Offline
                JonBJ Offline
                JonB
                wrote on last edited by
                #16

                @Lati
                Suggestion then is that your app does indeed attempt to load something off the network?

                Meanwhile, I don't understand why your program causes svchost.exe_TermService,.. svchost is to do with Windows Services, I wonder why these are involved in running this application?

                L 1 Reply Last reply
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                • JonBJ JonB

                  @Lati
                  Suggestion then is that your app does indeed attempt to load something off the network?

                  Meanwhile, I don't understand why your program causes svchost.exe_TermService,.. svchost is to do with Windows Services, I wonder why these are involved in running this application?

                  L Offline
                  L Offline
                  Lati
                  wrote on last edited by Lati
                  #17

                  @JonB Yes, it loads a website from internet to a *QWebView * control (it is a small website with few kilobytes).

                  App has nothing to do with Windows Services; at least nothing intentionally coded in the app which uses the Windows Services.

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                  • hskoglundH Online
                    hskoglundH Online
                    hskoglund
                    wrote on last edited by
                    #18

                    Hmm error 0xc0000007b means there's a mixup of 32-bits and 64-bits .dlls. If your app is 32-bit, perhaps you've copied the msvc runtime library .dlls from C:\Windows\System32?
                    Note that in Windows the 32-bits MSVC runtime .dlls are found in C:\Windows\SysWOW64 and instead C:\Windows\System32 houses the 64-bits one.

                    JonBJ 1 Reply Last reply
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                    • hskoglundH hskoglund

                      Hmm error 0xc0000007b means there's a mixup of 32-bits and 64-bits .dlls. If your app is 32-bit, perhaps you've copied the msvc runtime library .dlls from C:\Windows\System32?
                      Note that in Windows the 32-bits MSVC runtime .dlls are found in C:\Windows\SysWOW64 and instead C:\Windows\System32 houses the 64-bits one.

                      JonBJ Offline
                      JonBJ Offline
                      JonB
                      wrote on last edited by
                      #19

                      @hskoglund
                      I noted that too. But users says only happens when network cable unplugged! Normally he gets a 0xc0000008 rather than a 0xc0000007b . Strange how that could lead to 32-/64-bit issue?!

                      L 1 Reply Last reply
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                      • JonBJ JonB

                        @hskoglund
                        I noted that too. But users says only happens when network cable unplugged! Normally he gets a 0xc0000008 rather than a 0xc0000007b . Strange how that could lead to 32-/64-bit issue?!

                        L Offline
                        L Offline
                        Lati
                        wrote on last edited by
                        #20

                        @JonB No no, I haven't said it happens only when network cable is unplugged. It happens always with or without internet connection.

                        @hskoglund I wonder if this is the reason because I use the same deployment on all computers. But, I will check that again.

                        I hope I can solve this "mystery" soon :/

                        JonBJ 1 Reply Last reply
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                        • L Lati

                          @JonB No no, I haven't said it happens only when network cable is unplugged. It happens always with or without internet connection.

                          @hskoglund I wonder if this is the reason because I use the same deployment on all computers. But, I will check that again.

                          I hope I can solve this "mystery" soon :/

                          JonBJ Offline
                          JonBJ Offline
                          JonB
                          wrote on last edited by JonB
                          #21

                          @Lati

                          @JonB No no, I haven't said it happens only when network cable is unplugged. It happens always with or without internet connection.

                          Read what you have posted and you do seem to say what I wrote. First earlier:

                          Exception code: 0xc0000008

                          then later screenshot

                          0xc0000007b

                          It's what you have pasted!

                          Anyway, if you Google for the 0xc0000007b you will come across 32-/64-bit mis-match. I am not certain whether that always applies, but worth investigating.

                          L 1 Reply Last reply
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                          • JonBJ JonB

                            @Lati

                            @JonB No no, I haven't said it happens only when network cable is unplugged. It happens always with or without internet connection.

                            Read what you have posted and you do seem to say what I wrote. First earlier:

                            Exception code: 0xc0000008

                            then later screenshot

                            0xc0000007b

                            It's what you have pasted!

                            Anyway, if you Google for the 0xc0000007b you will come across 32-/64-bit mis-match. I am not certain whether that always applies, but worth investigating.

                            L Offline
                            L Offline
                            Lati
                            wrote on last edited by Lati
                            #22

                            @JonB @hskoglund
                            Nope, I have re-deployed using windeployqt.exe and copied the necessary dlls from SysWOW64 (again) and still have the same problem.

                            To summarize: I deployed the application created using QT Creator and test the executable on different computers. Deployed files are same on 6 different computers. Executable runs on three computers without any issue and crashes on other three without any indication.

                            Additionally, I uninstalled all VC++ Runtime installations on one of the computer and installed the ones in the "C:\Qt\vcredist" and still have the same problem.

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                            • hskoglundH Online
                              hskoglundH Online
                              hskoglund
                              wrote on last edited by
                              #23

                              If you have 2 computers pretty near each other, and one of them is of the crashing kind and the other is one the healthy ones, try swapping the network cables, i.e. unplug the network cable going to the healthy PC and instead plug it into the crashing PC, and the other way around.

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                              • fcarneyF Offline
                                fcarneyF Offline
                                fcarney
                                wrote on last edited by
                                #24

                                A couple thoughts:

                                • Make sure you are running the correct version of the deploy tool. I had issues with my deploys where I was running it under the 5.12.2 console when I should be running it under the 5.12.5 console.
                                • Check for race conditions on when your web data arrives. Is your app relying on the data it grabs and if it doesn't get it in time it will cause a crash.

                                C++ is a perfectly valid school of magic.

                                L 1 Reply Last reply
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                                • fcarneyF fcarney

                                  A couple thoughts:

                                  • Make sure you are running the correct version of the deploy tool. I had issues with my deploys where I was running it under the 5.12.2 console when I should be running it under the 5.12.5 console.
                                  • Check for race conditions on when your web data arrives. Is your app relying on the data it grabs and if it doesn't get it in time it will cause a crash.
                                  L Offline
                                  L Offline
                                  Lati
                                  wrote on last edited by Lati
                                  #25

                                  Ok. I decided to install the Qt on one of the computer where executable crashes. I copied the whole development folder and build the application. I can build the application in Debug and Release without any problem. However, when I try to start the debug with F5, I get following error:

                                  Capture.PNG

                                  Please note that Qt is installed on D drive. I tried few solutions offered by Google, like copying the Qt dll's in the debug folder which didn't help. I feel very desperate.

                                  @hskoglund
                                  Pc's are a bit far from each other :) I use remote desktop most of the time.

                                  @fcarney
                                  I checked that, it is v 5.12.1. I don't know how to be sure which version it should be.

                                  L JonBJ 2 Replies Last reply
                                  0
                                  • L Lati

                                    Ok. I decided to install the Qt on one of the computer where executable crashes. I copied the whole development folder and build the application. I can build the application in Debug and Release without any problem. However, when I try to start the debug with F5, I get following error:

                                    Capture.PNG

                                    Please note that Qt is installed on D drive. I tried few solutions offered by Google, like copying the Qt dll's in the debug folder which didn't help. I feel very desperate.

                                    @hskoglund
                                    Pc's are a bit far from each other :) I use remote desktop most of the time.

                                    @fcarney
                                    I checked that, it is v 5.12.1. I don't know how to be sure which version it should be.

                                    L Offline
                                    L Offline
                                    Lati
                                    wrote on last edited by Lati
                                    #26

                                    Finally! I found where the problem is. I received source code of the one of the libraries I use. And there is following code in the library:

                                    programXRootDirectory = getenv("ProgramXROOT");
                                    

                                    And yes, if the environmental variable doesn't exist, executable crashes. Strangely, there is no sign about the crash caused by getenv.

                                    I will keep this thread, maybe someone else has the same problem.

                                    I would like to thank you everyone who tried to help me so far!

                                    Update:getenv is deprecated and _dupenv_s recommended instead. More information about _dupenv_s

                                    Pablo J. RoginaP 1 Reply Last reply
                                    2
                                    • L Lati

                                      Finally! I found where the problem is. I received source code of the one of the libraries I use. And there is following code in the library:

                                      programXRootDirectory = getenv("ProgramXROOT");
                                      

                                      And yes, if the environmental variable doesn't exist, executable crashes. Strangely, there is no sign about the crash caused by getenv.

                                      I will keep this thread, maybe someone else has the same problem.

                                      I would like to thank you everyone who tried to help me so far!

                                      Update:getenv is deprecated and _dupenv_s recommended instead. More information about _dupenv_s

                                      Pablo J. RoginaP Offline
                                      Pablo J. RoginaP Offline
                                      Pablo J. Rogina
                                      wrote on last edited by
                                      #27

                                      @Lati said in QT deployed executable crashes on some computers:

                                      Strangely, there is no sign about the crash caused by getenv.

                                      Well, it looks like the culprit isn't getenv() but the way the return value from that function is used within the DLL later on. From man getvenv:

                                      The getenv() function returns a pointer to the value in the environment, or NULL if there is no match.

                                      so programXRootDirectory becomes NULL when the variable is not set, and the world ends...

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                                      L 1 Reply Last reply
                                      3
                                      • L Lati

                                        Ok. I decided to install the Qt on one of the computer where executable crashes. I copied the whole development folder and build the application. I can build the application in Debug and Release without any problem. However, when I try to start the debug with F5, I get following error:

                                        Capture.PNG

                                        Please note that Qt is installed on D drive. I tried few solutions offered by Google, like copying the Qt dll's in the debug folder which didn't help. I feel very desperate.

                                        @hskoglund
                                        Pc's are a bit far from each other :) I use remote desktop most of the time.

                                        @fcarney
                                        I checked that, it is v 5.12.1. I don't know how to be sure which version it should be.

                                        JonBJ Offline
                                        JonBJ Offline
                                        JonB
                                        wrote on last edited by JonB
                                        #28

                                        @Lati
                                        That file error screenshot is in Qt5Cored.dll. Note the d at the end of the name. That is the version compiled for debug (plus the message). Why are you deploying debug DLLs?

                                        It would be interesting to see whether the problem across different PCs even occurs any more if you compiled & released for Release instead?

                                        getenv does not crash when an environment variable does not exist, it returns NULL. If the code fails to deal with that (e.g. dereferences), that's a different matter, and is the only way it could "crash". So you have verified that the environment variable named ProgramXROOT does not/does exist on the machines which crash/don't crash respectively?

                                        1 Reply Last reply
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                                        • Pablo J. RoginaP Pablo J. Rogina

                                          @Lati said in QT deployed executable crashes on some computers:

                                          Strangely, there is no sign about the crash caused by getenv.

                                          Well, it looks like the culprit isn't getenv() but the way the return value from that function is used within the DLL later on. From man getvenv:

                                          The getenv() function returns a pointer to the value in the environment, or NULL if there is no match.

                                          so programXRootDirectory becomes NULL when the variable is not set, and the world ends...

                                          L Offline
                                          L Offline
                                          Lati
                                          wrote on last edited by Lati
                                          #29

                                          @Pablo-J-Rogina
                                          Exactly! No-one would guess the crash is due to getenvsince all indications were showing that it was either false libraries or graphic card issue.

                                          @JonB
                                          I am not deploying anything on that screen. The screenshot is after I clicked on F5 to debug the code and the path of the Qt5Cored.dll is from Qt's installation directory (Qt is installed on D: drive, as I mentioned). getenv crashes on my computer, as well as the deployed executable crashes on the computers if the environmental variable doesn't exist. It is very easy to test by writing a small application.

                                          JonBJ 1 Reply Last reply
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