can I dlsym malloc function? about dlfcn-win32 HOT 5 CLOSED

@CaffeMrDe Well, if I understand correctly, you are trying to wrap system malloc() function (more precisely malloc() from msvcrt.dl) via dlsym+RTLD_NEXT like on linux/ELF systems. The problem is that dlsym() implementation in dlfcn-win32 project internally uses malloc() function, so you are not able to resolve malloc symbol via dlsym+RTLD_NEXT. I do not think that on Windows it is possible to write RTLD_NEXT support without dynamic allocation.

@traversaro GetProcAddress() does not support RTLD_NEXT flag. And I'm not aware of any Win32 API function which could provide RTLD_NEXT-like feature. This is really unique for dlfcn-win32 and in past I was in doubt if something like this is even possible to implement on Windows (but it is - we have it).

from dlfcn-win32.

Hello @CaffeMrDe, I am not sure how to address your problem. To debug further, did you check if this works correctly if you use directly Win32 APIs like GetProcAddress without passing via dlfcn-win32 ?

Anyhow, I marked the issue as help wanted so if anyone from the community knows how to solve this problem or has any pinput, they are welcome to comment!

from dlfcn-win32.

Thanks @pali !

from dlfcn-win32.

@CaffeMrDe As a simple "hack", you can replace malloc() in dlfcn-win32 project by some other dynamic allocator. For example by LocalAlloc() from WinAPI/kernel32.dll (and free() by LocalFree()). Then you should be able to wrap msvcrt.dll's malloc(), but you cannot wrap kernel32.dll's LocalAlloc().

from dlfcn-win32.

Okay, I see what you mean! Thank you for your help!

from dlfcn-win32.