Bug with dlopen() and fork()
Corinna Vinschen
corinna-cygwin@cygwin.com
Thu Feb 20 15:01:00 GMT 2014
On Feb 20 14:16, Jaime Fabregas Fernandez wrote:
> Hello Corinna,
>
> As you've checked, this behaviour doesn't appear with dll's created by
> gcc, but it does with Visual Studio C++.
> That minimal example compiled with VS will result in the freeze of the
> child process.
>
> ================ testlib.h ======================
> #ifdef TESTLIB_EXPORTS
> #define TEST_API extern "C" __declspec(dllexport)
> #else
> #define TEST_API extern "C" __declspec(dllimport)
> #endif
>
> TEST_API int mylib_open (const char *foo);
> =============================================
>
> =============== testlib.cpp ======================
> #include "stdafx.h"
> #include "testLib.h"
>
> int
> mylib_open (const char *foo)
> {
> return 1;
> }
> ==============================================
>
> I've tested several compiler and linker options with same result.
>
> Any ideas?
Using MS DLLs across fork in this way is unsupported. If you get it
working, you're just lucky.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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