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From "Mohanraj Loganathan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-6639) [classlib][luni]fd's passed c functions needs casting from long to int to avoid potential problems
Date Tue, 31 Aug 2010 09:55:54 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-6639?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mohanraj Loganathan updated HARMONY-6639:
-----------------------------------------

    Attachment: HARMONY-6639.patch

Attaching patch for the same. Patch is taken from Java5 level. It can be applied to Java6
level also. 

> [classlib][luni]fd's passed c functions needs casting from long to int to avoid potential
problems
> --------------------------------------------------------------------------------------------------
>
>                 Key: HARMONY-6639
>                 URL: https://issues.apache.org/jira/browse/HARMONY-6639
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>         Environment: All Unix platforms 
>            Reporter: Mohanraj Loganathan
>         Attachments: HARMONY-6639.patch
>
>
> fd's passed c functions needs casting from long to int to avoid potential problems
> Consider the functions below. Here fd is jlong. But both the functions will accept int.
So this may cause some potential issues.
> mmap(0, (size_t)(size&0x7fffffff), prot, flags, fd-FD_BIAS, (off_t)(alignment&0x7fffffff));
> fstat((int)fd - FD_BIAS, &statbuf)
> typecasting them to int will avoid the truncation issues.

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