Support JDK 26

[msridhar]

As usual, we have not tested any new bytecode features of JDK 26, so they may not work. But, WALA can now accept class files generated by JDK 26.

[github-actions]

Test Results

  971 files  +123    971 suites  +123   6h 23m 42s ⏱️ + 59m 53s
  800 tests ±  0    781 ✅ ±  0   19 💤 ± 0  0 ❌ ±0 
6 284 runs  +800  6 130 ✅ +781  154 💤 +19  0 ❌ ±0 

Results for commit 98bd5d5. ± Comparison against base commit 60c1e36.

♻️ This comment has been updated with latest results.

[msridhar]

The issue here is that java.lang.Process implements AutoCloseable on JDK 26 but not before:

https://www.oracle.com/java/technologies/javase/26-relnote-issues.html#JDK-8364361

On JDK 26, ECJ gives leak reports, some of which can't be fixed on previous JDK versions since Process has no close method there. But, if I suppress, on previous JDK versions ECJ complains of an unnecessary suppression.

@liblit I think the solution here, if it works, is to pass the the equivalent of javac's --release flag to ECJ, so it knows which API version we are targeting (JDK 11). Do you know if that is possible, and if so, could you possibly look into it in a separate PR? Right now we pass -source and -target flags but I think / hope --release is supported by ECJ.

[liblit]

Investigating. 🕵️‍♂️

[liblit]

After #1866, these extra leak suppressions for Process will no longer be needed. I have verified that both of the following pass all GitHub CI tests:

• master plus Revise management of Eclipse-related Java versions #1866
• Support JDK 26 #1865 minus extra leak suppressions plus Revise management of Eclipse-related Java versions #1866

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 50.37%. Comparing base (60c1e36) to head (98bd5d5).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
...java/com/ibm/wala/shrike/shrikeCT/ClassReader.java	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #1865   +/-   ##
=========================================
  Coverage     50.37%   50.37%           
- Complexity    12646    12647    +1     
=========================================
  Files          1365     1365           
  Lines         84813    84813           
  Branches      14470    14470           
=========================================
+ Hits          42726    42728    +2     
+ Misses        37344    37343    -1     
+ Partials       4743     4742    -1     

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