CLR load function not working in nim's c++ dll #91
Description
I have created a cpp dll using nim with an exported function which loads a dotnet dll from disk using winim/clr library's load function. If I pass file path to the load function, it works correctly and loads the dll (I have confirmed it by calling a function of loaded dll which pops a messagebox), but If I pass the byte array of file, the code execution gets stuck at load function call. Any reason why is it happening for this particular overloaded method ?
Example :
Working code with path as parameter to load function
import winim/clr
proc NimMain() {.cdecl, importc.}
proc DllMain(hinstDLL: HINSTANCE, fdwReason: DWORD,
lpvReserved: LPVOID): BOOL {.stdcall, exportc, dynlib.} =
NimMain()
if fdwReason == DLL_PROCESS_ATTACH:
return true
proc abc(): void {.stdcall, exportc, dynlib.} =
try:
var assembly = load("PATH_OF_DOTNETDLL")
MessageBox(0, "loaded", "loaded", 0)
var Program = assembly.GetType("DotNetDll.Program")
var programInstance = @Program.new()
except Exception as ex:
MessageBox(0, ex.msg, "exception", 0)
In the above example, I am instantiating Program class of DotNetDll dll which contains a static constructor with a messagebox. the messagebox from the constructor is getting executed and working fine
Example : Not working with byte array loading
import winim/clr
proc NimMain() {.cdecl, importc.}
proc DllMain(hinstDLL: HINSTANCE, fdwReason: DWORD,
lpvReserved: LPVOID): BOOL {.stdcall, exportc, dynlib.} =
NimMain()
if fdwReason == DLL_PROCESS_ATTACH:
return true
proc abc(): void {.stdcall, exportc, dynlib.} =
let file = "PATH_OF_DOTNETDLL"
let f = file.open(fmRead)
MessageBox(0, "read", "read", 0)
let filesize = f.getFileSize()
MessageBox(0, $filesize, "size", 0)
var bytes = newSeq[byte](filesize)
var read = f.readBytes(bytes, 0, filesize)
MessageBox(0, $read, "read", 0)
try:
var assembly = load(bytes)
MessageBox(0, "loaded", $read, 0)
var Program = assembly.GetType("DotNetDll.Program")
var programInstance = @Program.new()
except Exception as ex:
MessageBox(0, ex.msg, "exception", 0)
In the above example, I am not able to see the "loaded" message box and the execution gets stuck. it does not even throw any exception.
I am executing the dll with rundll32 exe, also cpp dll is x64 based and dotnet dll is made in .NET Framwork 2.0. I have also tested both the methods in a normal nim exe and it works fine. but it is not working in cpp dll as shown above