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perf/hw_breakpoint: Add KUnit test for constraints accounting

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Add KUnit test for hw_breakpoint constraints accounting, with various
interesting mixes of breakpoint targets (some care was taken to catch
interesting corner cases via bug-injection).

The test cannot be built as a module because it requires access to
hw_breakpoint_slots(), which is not inlinable or exported on all
architectures.

Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20220829124719.675715-2-elver@google.com
This commit is contained in:
Marco Elver
2022-08-29 14:47:06 +02:00
committed by Peter Zijlstra
parent f4054e5225
commit 724c299c6a
3 changed files with 334 additions and 0 deletions
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1
kernel/events/Makefile
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@@ -2,4 +2,5 @@
obj-y := core.o ring_buffer.o callchain.o
obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
obj-$(CONFIG_HW_BREAKPOINT_KUNIT_TEST) += hw_breakpoint_test.o
obj-$(CONFIG_UPROBES) += uprobes.o