Please help me to debug a bug for instant client on linux x86-64

Question

I am a c junior programmer, I wrote a c demo based on <Call Interface Programmer's Guide>,but i found failed sometimes and successful somtimes when i run my demo on linux x86-64.
I wondered why it was failed sometimes and successful sometimes, so i used command strace to debug my demo.
I found my demo was failed when called function getsockopt  whose third argument was negative. The following code:
getsockopt  (5, SOL_SOCKET, SO_SNDBUF, [-8683868481690533888], [4]) = 0
my demo run successful when the third argument of function getsockopt was positive.The following code:
getsockopt(5, SOL_SOCKET, SO_SNDBUF, [4636081913715490816], [4]) = 0
I downloaded rpm package of instant client for linux x86-32 and installed, the same demo worked perfectly on linux x86-32.
Did instant client for linux x86-64 has a bug?
any advise would be great.
Thank you!

Answer 1

thanks.
I have solved this problem that result in my c demo.
I was a wrong way to use this function OCIBindByName. I ignored it's Indicator Variables must be 0 , -1 or -2.