RFR: 8303942: FileMapInfo::write_bytes aborts on a short os::write

[David Holmes]

On Mon, 3 Apr 2023 09:13:54 GMT, Afshin Zafari <duke at openjdk.org> wrote:

>> Ah! That is not in the version of the manpage on my system. But the one you link also has:
>>> According to POSIX.1, if count is greater than SSIZE_MAX, the  result is implementation-defined; see NOTES for the upper limit  on Linux.
>> 
>> which explains things. Thanks.
>
> `size` is checked to be `> 0` in loop's condition. Is assert for it still needed?

With the new information an assert that nbytes <= SSIZE_MAX might still be appropriate. Let's see what others think.

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PR Review Comment: https://git.openjdk.org/jdk/pull/13188#discussion_r1155734249