# SPDX-License-Identifier: GPL-2.0-only

  config ARCH_HAS_UBSAN_SANITIZE_ALL
  	bool
  
  config UBSAN
  	bool "Undefined behaviour sanity checker"
  	help
  	  This option enables undefined behaviour sanity checker
  	  Compile-time instrumentation is used to detect various undefined
  	  behaviours in runtime. Various types of checks may be enabled

  	  via boot parameter ubsan_handle
  	  (see: Documentation/dev-tools/ubsan.rst).

  
  config UBSAN_SANITIZE_ALL
  	bool "Enable instrumentation for the entire kernel"
  	depends on UBSAN
  	depends on ARCH_HAS_UBSAN_SANITIZE_ALL

  
  	# We build with -Wno-maybe-uninitilzed, but we still want to
  	# use -Wmaybe-uninitilized in allmodconfig builds.
  	# So dependsy bellow used to disable this option in allmodconfig
  	depends on !COMPILE_TEST

  	default y
  	help
  	  This option activates instrumentation for the entire kernel.
  	  If you don't enable this option, you have to explicitly specify
  	  UBSAN_SANITIZE := y for the files/directories you want to check for UB.

  	  Enabling this option will get kernel image size increased
  	  significantly.

  config UBSAN_NO_ALIGNMENT
  	bool "Disable checking of pointers alignment"

  	depends on UBSAN

  	default y if HAVE_EFFICIENT_UNALIGNED_ACCESS

  	help

  	  This option disables the check of unaligned memory accesses.
  	  This option should be used when building allmodconfig.
  	  Disabling this option on architectures that support unaligned

  	  accesses may produce a lot of false positives.

  config UBSAN_ALIGNMENT
  	def_bool !UBSAN_NO_ALIGNMENT

  config TEST_UBSAN
  	tristate "Module for testing for undefined behavior detection"
  	depends on m && UBSAN
  	help
  	  This is a test module for UBSAN.
  	  It triggers various undefined behavior, and detect it.