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Added Node.js support

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Joseph Henry 2015-10-21 16:27:17 -07:00
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20151021 Added Node.js support
Notes:
- syscall(long number, ...) is now intercepted and re-directs the __NR_accept4 call to our intercepted accept4() function
- accept() now returns -EAGAIN in the case that we cannot read a signal byte from the descriptor linked to the service. This
is because the uv__server_io() function in libuv used by Node.js looks for this return value upon failure, without it we
were observing an innfinite loop in the I/O polling code in libuv.
- accept4() now correctly sets given flags for descriptor returned by accept()
- setsockopt() was modified to return success on any call with the following conditions:
level == IPPROTO_TCP || (level == SOL_SOCKET && option_name == SO_KEEPALIVE)
This might be unnecessary or might need a better workaround
- Careful attention should be given to how arguments are passed in the intercepted syscall() function, this differs for
32/64-bit systems