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selftests/nolibc: enable UBSAN if available

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UBSAN detects undefined behaviour at runtime.
To avoid introduction of new UB, enable UBSAN for nolibc-test.

By signalling detected errors through traps no runtime dependency
is necessary.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250419-nolibc-ubsan-v2-7-060b8a016917@weissschuh.net
This commit is contained in:
Thomas Weißschuh 2025-04-19 12:46:24 +02:00
parent 6478251f95
commit 8509b5c9fa
1 changed files with 2 additions and 1 deletions
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3
tools/testing/selftests/nolibc/Makefile
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@ -189,9 +189,10 @@ ifeq ($(origin XARCH),command line)
CFLAGS_XARCH = $(CFLAGS_$(XARCH))
endif
CFLAGS_STACKPROTECTOR ?= $(call cc-option,-mstack-protector-guard=global $(call cc-option,-fstack-protector-all))
CFLAGS_SANITIZER ?= $(call cc-option,-fsanitize=undefined -fsanitize-trap=all)
CFLAGS ?= -Os -fno-ident -fno-asynchronous-unwind-tables -std=c89 -W -Wall -Wextra \
$(call cc-option,-fno-stack-protector) $(call cc-option,-Wmissing-prototypes) \
$(CFLAGS_XARCH) $(CFLAGS_STACKPROTECTOR) $(CFLAGS_EXTRA)
$(CFLAGS_XARCH) $(CFLAGS_STACKPROTECTOR) $(CFLAGS_SANITIZER) $(CFLAGS_EXTRA)
LDFLAGS :=
LIBGCC := -lgcc