8357249: Compiler task keeps --system files open#2377

Draft

david-beaumont wants to merge 3 commits into

openjdk:lworldfrom

david-beaumont:JDK_8357249_refactor

Commits on Apr 28, 2026

minimal but hacky changes for letting files be closed
david-beaumont
committed

Commits on Apr 29, 2026

avoid copying complete buffer and tidy code
david-beaumont
committed

Commits on Apr 30, 2026

rewrite buffer handling for clarity
david-beaumont
committed