RFR: 7131399: Poll system call appears to be broken on Mac OS [macosx]

[Michael McMahon]

On 23/01/12 21:30, Alan Bateman wrote:
> On 23/01/2012 17:09, Michael McMahon wrote:
>> Can I get the following change reviewed please?
>>
>> http://cr.openjdk.java.net/~michaelm/7131399/webrev.1/
>>
>> The problem is that poll(2) doesn't seem to work in a specific edge 
>> case tested by JCK,
>> namely, when a zero length UDP message is sent on a DatagramSocket.  
>> The problem is only
>> detected on timed reads, ie. normal blocking reads work fine.
>>
>> The fix is to make the NET_Timeout() function use select() instead of 
>> poll().
>>
>> Thanks,
>> Michael.
>>
> The first argument to select is s+1, shouldn't is be 1?
>
> -alan
No, I don't think so. fd_sets are bit masks and you have to specify the 
highest numbered bit in the
mask (+1).

- Michael.