8/18/2023 0 Comments Tonido runtime error r6025![]() Later on you extend IMyInterface with another method Bar. Now assume that you create a new DLL called v1.dll that contains a class that implements IMyInterface. For example assume you create an interface called IMyInterface with a method called Foo and store it in the DLL MyInterface.dll. It theoretically can not happen if all the code is compiled because the compiler will catch such an error but with DLLs it is a little different. Of course if you are getting an actual exception then the exception should also tell you what is going on.Īs for the pure virtual function error it is normally caused by attempting to use a method of a class in a DLL that is older than the public interface you wrote your code to. The problem DLL will probably be the last DLL loaded. The nice thing about this error though is that it should be pretty easy to track down the DLL causing problems if you are running through the debugger or if you run the application under Depends (with profiling) or another tool that logs DLL loading. Note that many ActiveX controls are written in C++ so instantiating an ActiveX control may be enough to cause the problem. Nevertheless if your application loads any DLLs then you need to ensure that each DLL does not attempt to load managed code in DllMain. In fact in 2.0 I believe this issue has been resolved or at least worked around completely such that you don't have to worry about it. This whole issue has been well documented. Therefore if you are in the middle of loading your DLL and the CLR is then loaded it'll deadlock. ![]() However the CLR also needs to load some DLLs. When a DLL loads the OS takes a local temporarily to ensure the DLL is loaded thread-safe. The LoaderLock issue is caused by someone attempting to use managed code in DllMain. Just about every application has C++ code running somewhere because the CLR and Windows itself are written (at least portions of it) in C/C++.
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