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kcsan: Add test suite

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This adds KCSAN test focusing on behaviour of the integrated runtime.
Tests various race scenarios, and verifies the reports generated to
console. Makes use of KUnit for test organization, and the Torture
framework for test thread control.

Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Marco Elver 2020-05-05 20:28:21 +02:00 committed by Paul E. McKenney
parent c93773c1a3
commit 1fe84fd4a4
3 changed files with 1109 additions and 1 deletions
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3
kernel/kcsan/Makefile
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@ -12,3 +12,6 @@ CFLAGS_core.o := $(call cc-option,-fno-conserve-stack,) \
obj-y := core.o debugfs.o report.o obj-y := core.o debugfs.o report.o
obj-$(CONFIG_KCSAN_SELFTEST) += test.o obj-$(CONFIG_KCSAN_SELFTEST) += test.o
CFLAGS_kcsan-test.o := $(CFLAGS_KCSAN) -g -fno-omit-frame-pointer
obj-$(CONFIG_KCSAN_TEST) += kcsan-test.o

1084
kernel/kcsan/kcsan-test.c Normal file
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23
lib/Kconfig.kcsan
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@ -59,7 +59,28 @@ config KCSAN_SELFTEST
bool "Perform short selftests on boot" bool "Perform short selftests on boot"
default y default y
help help
Run KCSAN selftests on boot. On test failure, causes the kernel to panic. Run KCSAN selftests on boot. On test failure, causes the kernel to
panic. Recommended to be enabled, ensuring critical functionality
works as intended.
config KCSAN_TEST
tristate "KCSAN test for integrated runtime behaviour"
depends on TRACEPOINTS && KUNIT
select TORTURE_TEST
help
KCSAN test focusing on behaviour of the integrated runtime. Tests
various race scenarios, and verifies the reports generated to
console. Makes use of KUnit for test organization, and the Torture
framework for test thread control.
Each test case may run at least up to KCSAN_REPORT_ONCE_IN_MS
milliseconds. Test run duration may be optimized by building the
kernel and KCSAN test with KCSAN_REPORT_ONCE_IN_MS set to a lower
than default value.
Say Y here if you want the test to be built into the kernel and run
during boot; say M if you want the test to build as a module; say N
if you are unsure.
config KCSAN_EARLY_ENABLE config KCSAN_EARLY_ENABLE
bool "Early enable during boot" bool "Early enable during boot"