Mariano Abad a305ed0417 drm: make an unpinned libdrmtap deliberate, and reject --drm off Linux ...

Three ways to build a different libdrmtap than the pinned one (DRMTAP_REPO,
DRMTAP_SHA, DRMTAP_PREBUILT_DIR) were each silent, and the last skips the
sha verification entirely. The claim this feature rests on is that the
privileged capture library is the reviewed object at the pinned sha, so any
build that is not that one now has to say so: the overrides still work and
still cover local work and cross-builds, but they need
DRMTAP_ALLOW_UNPINNED=1 alongside them and the build prints what it did.

--drm on Windows or macOS was accepted and then dropped by get_features(),
so it produced a stock build that looked like a DRM one. Reject it.

Also test the _drm body-read deadline, which nothing exercised: the header
and the body are separate reads, so the caller budget does not cover the
second one and a regression there would silently reopen the stall.

2026-07-28 14:26:37 -03:00

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