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Procedure entry point could not found mscoree dll: Causes and Solutions



If the application has a native entry point, the C++/CLI library that first executes managed code needs a runtimeconfig.json file. This config file is used when the .NET Core runtime starts. C++/CLI projects don't create runtimeconfig.json files automatically at build time yet, so the file must be generated manually. If a C++/CLI library is called from a managed entry point, then the C++/CLI library doesn't need a runtimeconfig.json file (since the entry point assembly will have one that is used when starting the runtime). A simple sample runtimeconfig.json file is shown below. For more information, see the spec on GitHub.




procedure entry point could not found mscoree dll



On Windows 7, loading a .NET Core C++/CLI assembly when the entry application is native may exhibit failing behavior. This failing behavior is due to the Windows 7 loader not respecting non-mscoree.dll entry points for C++/CLI assemblies. The recommended course of action is to convert the entry application to managed code. Scenarios involving Thread Local Storage (TLS) are specifically unsupported in all cases on Windows 7.


C++/CLI assemblies may be loaded multiple times, each time into a new AssemblyLoadContext. If the first time that managed code in a C++/CLI assembly is executed is from a native caller, the assembly is loaded into a separate AssemblyLoadContext. If the first time that managed code is executed is from a managed caller, the assembly is loaded into the same AssemblyLoadContext as the caller (usually the default). To always load your C++/CLI assembly into the default AssemblyLoadContext, add an "initialize" style call from your entry-point assembly to your C++/CLI assembly. For more information, see this dotnet/runtime issue.


The NewICLRMetaHostFromPtr function takes the pointer I get from CLRCreateInstance and returns an ICLRMetaHost object. This all appeared to work fine. I even did a fmt.Printf("+%v", metaHost) on the object and could see that every struct field was populated with a pointer, so it looked like it was working.


There are hundreds of executive service stubs in the NTDLL module (ntdll!NtSetEvent, ntdll!NtReadFile, and many others). The majority of these service stubs are undocumented in the MSDN, but a few stub entry points were deemed generally useful to third-party system software and are documented. The NTDLL.DLL system module also hosts several low-level OS features, such as the module loader (ntdll!Ldr* routines), the Win32 subsystem process communication functions (ntdll!Csr* routines), and several run-time library functions (ntdll!Rtl* routines) that expose features such as the Windows heap manager and Win32 critical section implementations.


Local/remote out-of-process COM servers For local out-of-process COM servers, local RPC is used as the underlying interprocess communication protocol, with ALPC as the actual low-level foundation. For remote COM servers (DCOM), the RPC communication protocol is used for the intermachine communication. In both cases, the proxy memory pointer that is returned to the client application from the COM activation sequence takes care of everything that's required to accomplish COM's promise of transparent remoting. Figure 1-9 illustrates this aspect.


The IL assemblies produced by the various .NET compilers also follow the standard Windows PE (Portable Executable) format and are just special-case native images from the perspective of the OS loader, except they have a marker in their PE header to indicate they are managed code binaries that should be handled by the .NET CLR. When the Windows module loader code in ntdll.dll detects the existence of a CLR header in the executable PE image it is about to launch, control is immediately transferred to the native CLR entry point (mscoree!_CorExeMain), which then takes care of finding and invoking the managed IL entry point in the image.


To support earlier OS versions (more specifically, Windows 98/ME and earlier service packs of Windows 2000 and Windows XP), which were not aware of the CLR header because the .NET Framework hadn't shipped at the time those operating systems were released, managed PE images also had to have a regular native entry point consisting of a very thin stub (jmp instruction) that simply invokes the CLR's main entry point method (mscoree!_CorExeMain). Fortunately, the Windows releases supported by .NET are now natively capable of loading managed code modules, and this stub is no longer strictly required.


The CLR shim DLL (mscoree.dll) again plays a key role in this reverse COM Interop scenario because it's the first native entry point to the CLR during the COM activation. This shim then loads the right CLR execution engine version, which then loads the managed COM types as they get invoked by the native code. This extends the functionality provided by the COM library in the OS without it having to know about the intricacies of managed code. During the COM activation sequence that the native application initiates, the COM library ends up invoking the standard DllGetClassObject method exported from mscoree.dll. If you used regasm.exe to generate the type library for the C# COM types, mscoree.dll also would've been added to the registry as the InProcServer32 for all the managed COM classes hosted by the .NET DLL assembly. The CLR shim DLL then forwards the call to the CLR execution engine, which takes care of implementing the class factory and standard native COM interfaces on behalf of the managed COM types.


Process's primary thread calls a method inside MSCorEE.dll which initializes CLR, loads the EXE assembly, and calls its entry point method (Main). At that point, the managed application is up and running.


To understand why this behavior makes sense, it is first important to know what happenswhen the workspace gets locked. When locking, KeePass completely closes the databaseand only remembers several view parameters, like the last selected group, the top visibleentry, selected entries, etc. From a security point of view, this achieves the bestsecurity possible: breaking a locked workspace is equal to breaking the database itself. 2ff7e9595c


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