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From "Sergey Dmitriev (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-4077) [classlib][portlib] socket related functions incorrectly work in socket > FD_SETSIZE
Date Wed, 06 Jun 2007 14:58:26 GMT
[classlib][portlib] socket related functions incorrectly work in socket > FD_SETSIZE
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                 Key: HARMONY-4077
                 URL: https://issues.apache.org/jira/browse/HARMONY-4077
             Project: Harmony
          Issue Type: Bug
          Components: Classlib
         Environment: linux only
            Reporter: Sergey Dmitriev


Socket related functions incorrectly work with sockets if socket no > FD_SETSIZE. On "SUSE
LINUX Enterprise Server 9" FD_SETSIZE is 1024.

The following functions:
 Java_org_apache_harmony_luni_platform_OSNetworkSystem_isReachableByICMPImpl
 Java_org_apache_harmony_luni_platform_OSNetworkSystem_selectImpl
 hysock_select_read
 getNextNetlinkMsg
 hysock_connect_with_timeout
 
use system select() to wait for event on only one file descriptor (socket). In case socket
number is greater than maximum fdset_t size (FD_SETSIZE) we can have SIGSEGV. Satellite functins
FD_SET, FD_ISSET, FD_CLR can cause SIGSEGV as well.

One of possible solutions here can be to use poll() instead of select() since we're talking
about wait for event on the single file descriptor.


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