RFR: 8355746: Start of release updates for JDK 26

[Joe Darcy]

On Fri, 2 May 2025 15:47:43 GMT, Chen Liang <liach at openjdk.org> wrote:

>> Get JDK 26 underway.
>
> make/conf/version-numbers.conf line 36:
> 
>> 34: DEFAULT_VERSION_EXTRA2=0
>> 35: DEFAULT_VERSION_EXTRA3=0
>> 36: DEFAULT_VERSION_DATE=2026-03-16
> 
> Is this accurate?

One day off; should be 2026-03-17.

I should have double-checked that in the initial authoring of the change.

> src/jdk.compiler/share/classes/com/sun/tools/javac/processing/PrintingProcessor.java line 58:
> 
>> 56:  */
>> 57: @SupportedAnnotationTypes("*")
>> 58: @SupportedSourceVersion(SourceVersion.RELEASE_26)
> 
> This processor should emulate `com.sun.tools.jdeprscan.TraverseProc` and override `getSupportedSourceVersion`.

The implementation of getSupportedSourceVersion inherited from AbstractProcessor uses the value of this annotation.

> test/hotspot/jtreg/testlibrary/asm/org/objectweb/asm/ClassReader.java line 229:
> 
>> 227:         // Check the class' major_version. This field is after the magic and minor_version fields, which
>> 228:         // use 4 and 2 bytes respectively.
>> 229:         if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V26) {
> 
> Please do not change ASM - if a test uses ASM to generate or parse later class files, they must migrate to the ClassFile API.  Open a JBS issue and identify the hotspot tests failing without this change.

There are various HotSpot tests that use ASM and they all fail under JDK 26 without this change.

> test/langtools/tools/javac/options/HelpOutputColumnWidthTest.java line 50:
> 
>> 48: public class HelpOutputColumnWidthTest extends TestRunner {
>> 49: 
>> 50:     public static final int MAX_COLUMNS = 84;
> 
> What is this for?

It is to accommodate the now longer list of --release values in the javac help output,the addition of ", 26".

Splitting the list of releases over two lines would be a better solution, but I didn't take that one when initially preparing the patch.

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

PR Review Comment: https://git.openjdk.org/jdk/pull/25008#discussion_r2071878858
PR Review Comment: https://git.openjdk.org/jdk/pull/25008#discussion_r2071883440
PR Review Comment: https://git.openjdk.org/jdk/pull/25008#discussion_r2071881672
PR Review Comment: https://git.openjdk.org/jdk/pull/25008#discussion_r2071880549