[PATCH v4 0/6] binder: Set up KUnit tests for alloc

From: Tiffany Yang
Date: Wed Jul 16 2025 - 21:10:27 EST


Hello,

binder_alloc_selftest provides a robust set of checks for the binder
allocator, but it rarely runs because it must hook into a running binder
process and block all other binder threads until it completes. The test
itself is a good candidate for conversion to KUnit, and it can be
further isolated from user processes by using a test-specific lru
freelist instead of the global one. This series converts the selftest
to KUnit to make it less burdensome to run and to set up a foundation
for unit testing future binder_alloc changes.

Thanks,
Tiffany

Tiffany Yang (6):
binder: Fix selftest page indexing
binder: Store lru freelist in binder_alloc
kunit: test: Export kunit_attach_mm()
binder: Scaffolding for binder_alloc KUnit tests
binder: Convert binder_alloc selftests to KUnit
binder: encapsulate individual alloc test cases

drivers/android/Kconfig | 15 +-
drivers/android/Makefile | 2 +-
drivers/android/binder.c | 10 +-
drivers/android/binder_alloc.c | 39 +-
drivers/android/binder_alloc.h | 14 +-
drivers/android/binder_alloc_selftest.c | 306 -----------
drivers/android/binder_internal.h | 4 +
drivers/android/tests/.kunitconfig | 7 +
drivers/android/tests/Makefile | 6 +
drivers/android/tests/binder_alloc_kunit.c | 572 +++++++++++++++++++++
include/kunit/test.h | 12 +
lib/kunit/user_alloc.c | 4 +-
12 files changed, 651 insertions(+), 340 deletions(-)
delete mode 100644 drivers/android/binder_alloc_selftest.c
create mode 100644 drivers/android/tests/.kunitconfig
create mode 100644 drivers/android/tests/Makefile
create mode 100644 drivers/android/tests/binder_alloc_kunit.c

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2.50.0.727.gbf7dc18ff4-goog