RFR: 8341735: Rewrite the build/AbsPathsInImage.java test to not load the entire file at once [v8]

[Erik Joelsson]

On Thu, 23 Oct 2025 19:23:51 GMT, Daniel Hu <duke at openjdk.org> wrote:

>> These changes prevent entire binary files from being loaded into memory for build/AbsPathsInImage.java test. Files are buffered and matching is performed using Knuth–Morris–Pratt algorithm. GHA passes and test passes on linux x64. Correctly fails when running with jdk build with `--enable-absolute-paths-in-output`.
>
> Daniel Hu has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add comments

Thanks, I think this looks good. I tried it myself on a build where I set `--enable-absolute-paths-in-output` and compared the matches found with what `strings` found on libjvm.dylib, and from what I can tell, the test didn't miss anything.

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Marked as reviewed by erikj (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26030#pullrequestreview-3372303638