August 2021 - core-libs-dev

RFR: 8272137: Make Iterable classes streamable
by CC007 01 Sep '21

01 Sep '21

create Streamable and ParallelStreamable interface and use them in Collection and Optional ------------- Commit messages: - 8272137: no CR - 8272137: create Streamable and ParallelStreamable interface and use in Collection and Optional Changes: https://git.openjdk.java.net/jdk/pull/5050/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5050&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8272137 Stats: 104 lines in 4 files changed: 101 ins; 0 del; 3 mod Patch: https://git.openjdk.java.net/jdk/pull/5050.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5050/head:pull/5050 PR: https://git.openjdk.java.net/jdk/pull/5050

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RFR: 8269039: Disable SHA-1 Signed JARs
by Sean Mullan 31 Aug '21

31 Aug '21

This change will disable JARs signed with algorithms using SHA-1 by default, and treat them as unsigned. This applies to the algorithms used to digest, sign, and optionally timestamp the JAR. It also applies to the signature and digest algorithms of the certificates in the certificate chain of the code signer and the Timestamp Authority, and any CRLs or OCSP responses that are used to verify if those certificates have been revoked. The specific details are more fully described in the CSR: https://bugs.openjdk.java.net/browse/JDK-8272155. Some additional notes about the fix: - This change was previously backed out of JDK 17 and delayed because of performance regressions. The overall performance is still to be verified, but the primary bottlenecks were addressed as follows: - `sun.security.util.DisabledAlgorithmConstraints` no longer depends on `java.text.SimpleDateFormat` to format date fields which is expensive. - the `jdkCA` constraint has been removed as this caused the `cacerts` keystore to be loaded. Applications using SHA-1 JARs signed by certificates that chain back to private CAs and are impacted by the restrictions can, at their own risk, adjust the properties and add back in the `jdkCA` constraint. - `jarsigner` has been enhanced to more accurately warn about algorithms that are disabled based on the constraints specified in the security properties. Previously it had used a simpler scheme which did not take into account constraints such as `Usage` or `DenyAfter`. Similar changes should also be made to `keytool` but that will be addressed in a separate issue. - Some SHA-1 JARs used by tests where it does not affect the results have been re-signed with SHA-2 algorithms. ------------- Commit messages: - Fix trailing whitespace. - Initial revision. Changes: https://git.openjdk.java.net/jdk/pull/5320/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5320&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8269039 Stats: 643 lines in 27 files changed: 301 ins; 214 del; 128 mod Patch: https://git.openjdk.java.net/jdk/pull/5320.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5320/head:pull/5320 PR: https://git.openjdk.java.net/jdk/pull/5320

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RFR: 8273169: java/util/regex/NegativeArraySize.java failed after JDK-8271302
by xpbob 31 Aug '21

31 Aug '21

8273169: java/util/regex/NegativeArraySize.java failed after JDK-8271302 ------------- Commit messages: - 8273169: java/util/regex/NegativeArraySize.java failed after JDK-8271302 Changes: https://git.openjdk.java.net/jdk/pull/5315/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5315&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8273169 Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod Patch: https://git.openjdk.java.net/jdk/pull/5315.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5315/head:pull/5315 PR: https://git.openjdk.java.net/jdk/pull/5315

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RFR: 8273092: Sort classlist in JDK image
by Ioi Lam 31 Aug '21

31 Aug '21

When the classlist is generated using build.tools.classlist.HelloClasslist, its contents may be non-deterministic due to Java thread execution order. We should sort the generated classlist to make the JDK image's contents more deterministic. Tested with Mach5 tier1, tier2, builds-tier5 ------------- Commit messages: - 8273092: Sort classlist in JDK image Changes: https://git.openjdk.java.net/jdk/pull/5288/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5288&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8273092 Stats: 114 lines in 3 files changed: 102 ins; 6 del; 6 mod Patch: https://git.openjdk.java.net/jdk/pull/5288.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5288/head:pull/5288 PR: https://git.openjdk.java.net/jdk/pull/5288

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RFR: 8271225: Add floorDivExact() method to java.lang.[Strict]Math
by Brian Burkhalter 31 Aug '21

31 Aug '21

Add methods `floorDivExact(int,int)` and `floorDivExact(long,long)` to `java.lang.Math` and `java.lang.StrictMath`. ------------- Commit messages: - 8271225: Add floorDivExact() method to java.lang.[Strict]Math Changes: https://git.openjdk.java.net/jdk/pull/4941/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4941&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8271225 Stats: 245 lines in 3 files changed: 236 ins; 0 del; 9 mod Patch: https://git.openjdk.java.net/jdk/pull/4941.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/4941/head:pull/4941 PR: https://git.openjdk.java.net/jdk/pull/4941

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RFR: 8273100: Improve AbstractStringBuilder.append(String) when using CompactStrings
by Claes Redestad 31 Aug '21

31 Aug '21

Refactor to improve inlining, which helps some microbenchmarks exer StringBuilder.append(String) ------------- Commit messages: - 8273100: Improve AbstractStringBuilder.append(String) when using CompactStrings Changes: https://git.openjdk.java.net/jdk/pull/5291/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5291&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8273100 Stats: 21 lines in 1 file changed: 11 ins; 2 del; 8 mod Patch: https://git.openjdk.java.net/jdk/pull/5291.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5291/head:pull/5291 PR: https://git.openjdk.java.net/jdk/pull/5291

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RFR: 8271302: Regex Test Refresh
by Ian Graves 31 Aug '21

31 Aug '21

8271302: Regex Test Refresh ------------- Commit messages: - Migrating regular expression tests to TestNG Changes: https://git.openjdk.java.net/jdk/pull/5092/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5092&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8271302 Stats: 2226 lines in 3 files changed: 225 ins; 965 del; 1036 mod Patch: https://git.openjdk.java.net/jdk/pull/5092.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5092/head:pull/5092 PR: https://git.openjdk.java.net/jdk/pull/5092

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RFR: 8272347: ObjectMethods::bootstrap should specify NPE if any argument except lookup is null
by Vicente Romero 30 Aug '21

30 Aug '21

Please review this simple PR along with the associated CSR. The PR is basically adding a line the the specification of method `java.lang.runtime.ObjectMethods::bootstrap` stating under what conditions a NPE will be thrown. TIA link to the [CSR](https://bugs.openjdk.java.net/browse/JDK-8272852) ------------- Commit messages: - 8272347: ObjectMethods::bootstrap should specify NPE if any argument except lookup is null Changes: https://git.openjdk.java.net/jdk/pull/5226/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5226&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8272347 Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod Patch: https://git.openjdk.java.net/jdk/pull/5226.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5226/head:pull/5226 PR: https://git.openjdk.java.net/jdk/pull/5226

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RFR: 8260265: UTF-8 by Default
by Naoto Sato 30 Aug '21

30 Aug '21

This is an implementation for the `JEP 400: UTF-8 by Default`. The gist of the changes is `Charset.defaultCharset()` returning `UTF-8` and `file.encoding` system property being added in the spec, but another notable modification is in `java.io.PrintStream` where it continues to use the `Console` encoding as the default charset instead of `UTF-8`. Other changes are mostly clarification of the term "default charset" and their links. Corresponding CSR has also been drafted. JEP 400: https://bugs.openjdk.java.net/browse/JDK-8187041 CSR: https://bugs.openjdk.java.net/browse/JDK-8260266 ------------- Commit messages: - 8260265: UTF-8 by Default Changes: https://git.openjdk.java.net/jdk/pull/4733/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4733&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8260265 Stats: 297 lines in 18 files changed: 184 ins; 9 del; 104 mod Patch: https://git.openjdk.java.net/jdk/pull/4733.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/4733/head:pull/4733 PR: https://git.openjdk.java.net/jdk/pull/4733

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RFR: 8272861: Add a micro benchmark for vector api
by Sandhya Viswanathan 30 Aug '21

30 Aug '21

This pull request adds a micro benchmark for Vector API. The Black Scholes algorithm is implemented with and without Vector API. We see about ~6x gain with Vector API for this micro benchmark using 256 bit vectors. ------------- Commit messages: - whitespace - 8272861: Add a micro benchmark for vector api Changes: https://git.openjdk.java.net/jdk/pull/5234/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5234&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8272861 Stats: 190 lines in 1 file changed: 190 ins; 0 del; 0 mod Patch: https://git.openjdk.java.net/jdk/pull/5234.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5234/head:pull/5234 PR: https://git.openjdk.java.net/jdk/pull/5234

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