I think your problem (and the stack overflow) is caused by using "CALLBACK" in
the 3 function typedefs. Try using __cdecl instead of CALLBACK.
__Martin
>>>>> On Tue, 11 Oct 2016 16:15:24 +0000, Simone Sgualdini via RT said:
>
>
> Hi,
>
>
> I'm writing a c++ server application that calls thounsands of times per
> hour the rsa_new()
> and rsa_free() openssl functions.
>
> After debugging a lot I discovered that "sometimes" (I'm not able to
> tell a precise number) the rsa_free
> does not release properly the memory allocated by the rsa_new.
> In order to prove this I created the simple program below. If i run it,
> i see the related working set
> going bigger and bigger, 4KB per second.
>
> I'm using the 1.0.2.8 version of libeay32.dll and ssleay32.ddl under
> windows 7 64 bit.
>
> It this a known bug? I'm forgetting something?
>
> Thanks in advance
>
> Simone Sgualdini
> Italy
>
>
> //---------------------------------------------------------------------------
>
> #include <vcl.h>
>
>
> #ifdef _cplusplus
> extern "C"
> {
> #endif
> #include <openssl/rand.h>
> #include <openssl/ssl.h>
> #include <openssl/err.h>
> #include <openssl/rsa.h>
> #include <openssl/bn.h>
> #ifdef _cplusplus
> }
> #endif
> #pragma hdrstop
>
> HMODULE libeay32DLL = NULL;
> HMODULE ssleay32DLL = NULL;
>
> typedef RSA * (CALLBACK *myRSA_new) (void);
> typedef void (CALLBACK *myRSA_free) (RSA *r);
> typedef int (CALLBACK *mySSL_library_init) (void);
>
> myRSA_new _RSA_new = NULL;
> myRSA_free _RSA_free = NULL;
> mySSL_library_init _SSL_library_init;
>
> //---------------------------------------------------------------------------
>
> #pragma argsused
>
> int main(int argc, char* argv[])
> {
> RSA *rsa;
> unsigned long count = 0;
>
> libeay32DLL = LoadLibrary("libeay32.dll");
> ssleay32DLL = LoadLibrary("ssleay32.dll");
>
> if(libeay32DLL && ssleay32DLL)
> {
> _RSA_new = (myRSA_new)
> GetProcAddress(libeay32DLL,"RSA_new");
> _RSA_free = (myRSA_free)
> GetProcAddress(libeay32DLL,"RSA_free");
> _SSL_library_init = (mySSL_library_init)
> GetProcAddress(ssleay32DLL,"SSL_library_init");
> }
>
> _SSL_library_init();
>
> while(1)
> {
>
> if(++count %100 == 0) // whitout this, I get a stack overflow
> immediately
> Sleep(1);
>
> *_RSA_free(_RSA_new());*
> }
>
> return 0;
> }
>
>
> --
> Ticket here: http://rt.openssl.org/Ticket/Display.html?id=4704
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>
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