sepp2012
29th July 2012 22:20 UTC

Plugin-DLL keeps Crashing
  Hello all,

I am trying to write a DLL with PureBasic :-)
I can call the DLL-function and I can even pass a parameter, but when the DLL-function ends the exe is crashing everytime with the error-code 0xc0000005. Does anyone have an idea?

Thanks,
Sepp

dlltest.nsi

"."


>Name "DLL-Test"

>OutFile "dlltest.exe"

>RequestExecutionLevel user

SilentInstall silent


Section

  MessageBox MB_OK "This is an internal MessageBox"

 dlltest::testprocedure "This is an DLL MessageBox with NSI-parameter"

 MessageBox MB_OK "This is the last Message"

>SectionEnd 

>

dlltest.pb

Structure TCHAR

 char.i

EndStructure


Structure stack_t

 *Next.stack_t

  text.s{1024}

>EndStructure


ProcedureDLL testprocedure(hwndParent.i, string_size.i, *variables.TCHAR, *stacktop_pointer, *extra)

  *stacktop.stack_t = PeekI(*stacktop_pointer)

  *stacktop_pointer = *stacktopNext ; Decrease Stack

  MessageRequester("testprocedure", *stacktoptext)

>EndProcedure 

>

Anders
29th July 2012 23:45 UTC

Try ProcedureCDLL

T.Slappy
30th July 2012 06:22 UTC

What about dlltest::testprocedure /NOUNLOAD "This is an DLL MessageBox with NSI-parameter" ??

sepp2012
30th July 2012 08:59 UTC

Originally posted by T.Slappy
What about dlltest::testprocedure /NOUNLOAD "This is an DLL MessageBox with NSI-parameter" ??

I tried that, but it is still crashing.
Also /NOUNLOAD was deprecated in NSIS 2.42 (but still works).

Originally posted by Anders
Try ProcedureCDLL

Yes, that's it :up:
Thank you very very much! I tried it for several hours, but did not got it.

I researched a little bit more, for all who are interested: NSIS-DLL's must use the cdecl calling convention (Windows-default is stdcall) whereas the calling function cleans the stack (at stdcall the callee cleans the stack).