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[ubsan] Add UBSAN implementation

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Add an UBSAN implementation and a new UBSAN switch to the make build.
The implementation is taken from Onyx and handles most of the cases
that should be needed for a kernel build. Floating point and fancy
C++ CFI features are not supported yet.

To build with UBSAN, pass UBSAN=1 to make such as:
PROJECT=pc-x86-64-test make -jN UBSAN=1
This commit is contained in:
Pedro Falcato
2023-02-18 23:42:53 +00:00
committed by Travis Geiselbrecht
parent bf2e94c2f8
commit 8ebbcea5ed
3 changed files with 581 additions and 0 deletions
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6
engine.mk
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@@ -71,6 +71,12 @@ GLOBAL_CPPFLAGS := --std=c++14 -fno-exceptions -fno-rtti -fno-threadsafe-statics
GLOBAL_ASMFLAGS := -DASSEMBLY
GLOBAL_LDFLAGS :=
ifeq ($(UBSAN), 1)
# Inject lib/ubsan directly into MODULE_DEPS
# lib/ubsan will itself add the needed CFLAGS
MODULE_DEPS += lib/ubsan
endif
# flags that are sometimes nice to enable to catch problems but too strict to have on all the time.
# add to global flags from time to time to find things, otherwise only available with a module
# option (see make/module.mk re: MODULE_OPTIONS).