JDK-8295685: Update Libpng to 1.6.38

[honkar-jdk]

Updated libpng library to v1.6.38.

Following files have been updated -

• 12 source code files of libpng
• LICENSE, README, CHANGES, UPDATING text files
• legal/libpng.md

---

Progress

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

Issue

• JDK-8295685: Update Libpng to 1.6.38

Reviewers

• Phil Race (@prrace - Reviewer) ⚠️ Review applies to 6fb39567
• Alexander Zvegintsev (@azvegint - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk pull/10953/head:pull/10953
$ git checkout pull/10953

Update a local copy of the PR:
$ git checkout pull/10953
$ git pull https://git.openjdk.org/jdk pull/10953/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 10953

View PR using the GUI difftool:
$ git pr show -t 10953

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/10953.diff

[bridgekeeper]

👋 Welcome back honkar! 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]

@honkar-jdk The following label will be automatically applied to this pull request:

• client

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.

[mlbridge]

Webrevs

• 04: Full - Incremental (3dc49a58)
• 03: Full - Incremental (6fb39567)
• 02: Full - Incremental (6be50dc1)
• 01: Full - Incremental (fd4a9650)
• 00: Full (e5798056)

[prrace]

Looks fine on the understanding that you built + tested on all platforms - running all automated tests.

[openjdk]

@honkar-jdk This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8295685: Update Libpng to 1.6.38

Reviewed-by: prr, azvegint

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 39 new commits pushed to the master branch:

• 25dfcbd: 8289689: (fs) Re-examine the need for normalization to Unicode Normalization Format D (macOS)
• b7442d1: 8295653: Add a graph of the sealed class hierarchy for marked classes
• 59a13b1: 8295872: [PPC64] JfrGetCallTrace: Need pc == nullptr check before frame constructor
• 2a79dfc: 8295774: Write a test to verify List sends ItemEvent/ActionEvent
• cc3c5a1: 8296101: nmethod::is_unloading result unstable with concurrent unloading
• d771abb: 8295970: Add vector api sanity tests in tier1
• 7a85441: 8232933: Javac inferred type does not conform to equality constraint
• 6ee8ccf: 8296168: x86: Add reasonable constraints between AVX and SSE
• 1950747: 8279913: obsolete ExtendedDTraceProbes
• 13b20e0: 8296262: Remove dead code from InstanceKlass::signature_name()
• ... and 29 more: https://git.openjdk.org/jdk/compare/590de37bd703bdae56e8b41c84f5fca5e5a00811...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

As you do not have Committer status in this project an existing Committer must agree to sponsor your change. Possible candidates are the reviewers of this PR (@prrace, @azvegint) but any other Committer may sponsor as well.

➡️ To flag this PR as ready for integration with the above commit message, type /integrate in a new comment. (Afterwards, your sponsor types /sponsor in a new comment to perform the integration).

[honkar-jdk]

/integrate

[openjdk]

@honkar-jdk
Your change (at version 3dc49a5) is now ready to be sponsored by a Committer.

[prrace]

/integrate

[prrace]

/sponsor

[openjdk]

@prrace Only the author (@honkar-jdk) is allowed to issue the integrate command. As this pull request is ready to be sponsored, and you are an eligible sponsor, did you mean to issue the /sponsor command?

[openjdk]

Going to push as commit b685fc2.
Since your change was applied there have been 45 commits pushed to the master branch:

• 94eb25a: 8256072: Eliminate JVMTI tagmap rehashing
• 4338f52: 8294241: Deprecate URL public constructors
• 68209ad: 8288232: Address typos in jar man page
• 2ff9d3a: 8294858: XMLStreamReader does not respect jdk.xml.maxXMLNameLimit=0 for namespace names
• 72f74df: 8292427: Improve specification of InflaterInputStream.fill()
• 53905e6: 8178355: IdentityHashMap uses identity-based comparison for values everywhere except remove(K,V) and replace(K,V,V)
• 25dfcbd: 8289689: (fs) Re-examine the need for normalization to Unicode Normalization Format D (macOS)
• b7442d1: 8295653: Add a graph of the sealed class hierarchy for marked classes
• 59a13b1: 8295872: [PPC64] JfrGetCallTrace: Need pc == nullptr check before frame constructor
• 2a79dfc: 8295774: Write a test to verify List sends ItemEvent/ActionEvent
• ... and 35 more: https://git.openjdk.org/jdk/compare/590de37bd703bdae56e8b41c84f5fca5e5a00811...master

Your commit was automatically rebased without conflicts.

[openjdk]

@prrace @honkar-jdk Pushed as commit b685fc2.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.