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feat(build): support KASAN in the build system v2 (cmakev2)

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Mirror Kernel Address Sanitizer support into cmakev2 so that
CONFIG_COMPILER_KASAN instruments application code the same way build system v1
does.
This commit is contained in:
Sudeep Mohanty
2026-08-03 17:31:17 +02:00
parent cc799dbcc7
commit 9c778c954c
6 changed files with 166 additions and 31 deletions
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tools/cmakev2/project.cmake
+25
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@@ -356,6 +356,31 @@ function(__init_project_configuration)
list(APPEND compile_options "-fstack-protector-all")
endif()
# Kernel Address Sanitizer (CONFIG_COMPILER_KASAN): instrument every memory
# load and store with a shadow-memory check. The flag goes into the C and C++
# options rather than the language-agnostic list because the assembler does
# not accept -fsanitize. Low-level components are de-instrumented again in
# idf_build_library(), see __kasan_exclude_components().
#
# A subproject that must never be instrumented (for example the bootloader,
# which runs before the sanitizer shadow is initialised) sets the
# SET_COMPILER_KASAN build property to NO before idf_project_init(), the
# same way it uses SET_COMPILER_LTO and SET_COMPILER_OPTIMIZATION; an unset
# property means instrumentation is allowed.
idf_build_get_property(set_compiler_kasan SET_COMPILER_KASAN)
if(NOT DEFINED set_compiler_kasan OR set_compiler_kasan STREQUAL "")
set(set_compiler_kasan YES)
endif()
if(CONFIG_COMPILER_KASAN AND set_compiler_kasan)
list(APPEND c_compile_options "-fsanitize=kernel-address")
list(APPEND cxx_compile_options "-fsanitize=kernel-address")
if(NOT CONFIG_KASAN_STACK)
list(APPEND c_compile_options "--param" "asan-stack=0")
list(APPEND cxx_compile_options "--param" "asan-stack=0")
endif()
list(APPEND link_options "-fsanitize=kernel-address")
endif()
if(CONFIG_COMPILER_DUMP_RTL_FILES)
list(APPEND compile_options "-fdump-rtl-expand")
endif()