RFR: 5041655: (ch) FileLock: negative param and overflow issues [v7]

[Brian Burkhalter]

On Thu, 10 Feb 2022 21:01:03 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> Add an implementation note to `java.nio.channels.FileLock.overlaps(long,long)` indicating that the method does not check its parameters. Adding such checks would be an incompatible change.
>
> Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:
> 
>   5041655: Further refinement of zero size lock specification

In the Unix version of `Java_sun_nio_ch_FileDispatcherImpl_lock0()`, I wonder whether in this block

    if (size == (jlong)java_lang_Long_MAX_VALUE) {
        fl.l_len = (off64_t)0;
    } else {
        fl.l_len = (off64_t)size;
    }

the check should be changed to

    if (pos + size == (jlong)java_lang_Long_MAX_VALUE) {

Similar question for `release0()`.

-------------

PR: https://git.openjdk.java.net/jdk/pull/7254