8384088: osThread _thread_id should be an int on all BSD's

[snake66]

The initializer for the _thread_id member in hotspot/os/bsd/osThread_bsd.cpp is incorrect for BSD's other than macOS. It should be an integer on all BSD's.

This work is sponsored by The FreeBSD Foundation

---

• I confirm that I make this contribution in accordance with the OpenJDK Interim AI Policy.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed (2 reviews required, with at least 1 Reviewer, 1 Author)

Issue

• JDK-8384088: osThread _thread_id should be an int on all BSD's (Enhancement - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/31070/head:pull/31070
$ git checkout pull/31070

Update a local copy of the PR:
$ git checkout pull/31070
$ git pull https://git.openjdk.org/jdk.git pull/31070/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 31070

View PR using the GUI difftool:
$ git pr show -t 31070

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/31070.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back haraldei! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

@snake66 The following label will be automatically applied to this pull request:

• hotspot-runtime

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

[openjdk]

The total number of required reviews for this PR has been set to 2 based on the presence of this label: hotspot-runtime. This can be overridden with the /reviewers command.

[mlbridge]

Webrevs

• 01: Full - Incremental (226aa1a1)
• 00: Full (168a1a18)

[Arraying]

IIUC, pid_t is actually __pid_t which is an __int32_t on FreeBSD. I checked OpenBSD and NetBSD as well (these are the ones we have macros for) and it's the same there. Seems like a reasonable change to me, thank you!

[Arraying]

Please bump.