[roll] Roll fuchsia [starnix] Fix vmsplice decoupling on munmap

Avoid decoupling file-backed and shared memory mappings from their
backing VMOs when they are unmapped while in a pipe (via vmsplice).

Previously, Starnix aggressively snapshotted all vmspliced payloads
on munmap. This broke Linux compatibility for file-backed mappings,
where subsequent writes to the file (e.g., via pwrite) should remain
visible to the pipe reader even after the mapping is unmapped.

Now, we only snapshot (decouple) private anonymous mappings to allow
resource reclamation, while keeping file-backed and shared mappings
coupled to their source VMOs.

Original-Original-Bug: 521345037
Test: vmsplice_test
Original-Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1649354
Original-Original-Revision: 7ee937e49103934603a89a0c7c71783dab4fbe44
GitOrigin-RevId: fefd2afe3568d14e4ab5ee328b2a5254023145d0
Change-Id: I94e1ca3bbed30b6f0b161ff0b6ef3139aa3b0601
Reviewed-on: https://fuchsia-review.googlesource.com/c/integration/+/1653381
Cr-Commit-Position: refs/heads/main@{#194688}
1 file changed
tree: 5366820b743e7376ccbd8f0053bbe79d4cf71b20
  1. ctf/
  2. git-hooks/
  3. infra/
  4. third_party/
  5. cobalt
  6. flower
  7. jiri.lock
  8. MILESTONE
  9. minimal
  10. prebuilts
  11. README.md
  12. stem
  13. test_durations
README.md

Integration

This repository contains Fuchsia's Global Integration manifest files.

Making changes

All changes should be made to the internal version of this repository. Our infrastructure automatically updates this version when the internal one changes.

Currently all changes must be made by a Google employee. Non-Google employees wishing to make a change can ask for assistance in one of the communication channels documented at get involved.

Obtaining the source

First install Jiri.

Next run:

$ jiri init
$ jiri import minimal https://fuchsia.googlesource.com/integration
$ jiri update

Third party

Third party projects should have their own subdirectory in ./third_party.