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https://github.com/SerenityOS/serenity
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CMake: Add UNDEFINED_BEHAVIOR_IS_FATAL configure option
This is mainly intended for use on CI, as UBSan instrumentation results
in a serious load and execution time penalty there. See the previous
commit for more details.
With this enabled, the size of LibWeb, built for x86-64 with Clang 17 as
of 0b91d36a is reduced as follows:
FILE SIZE VM SIZE
-------------- --------------
+18% +2.99Mi [ = ] 0 .debug_info
+14% +758Ki [ = ] 0 .debug_addr
+2.6% +7.92Ki [ = ] 0 .debug_abbrev
+129% +2.66Ki [ = ] 0 [Unmapped]
-0.2% -208 -0.2% -208 .plt
-0.2% -312 -0.2% -312 .rela.plt
-0.1% -336 -0.1% -336 .dynsym
-0.0% -647 -0.0% -513 [8 Others]
-0.1% -1.14Ki -0.1% -1.14Ki .dynstr
-20.1% -53.5Ki -20.1% -53.5Ki .eh_frame_hdr
-7.2% -56.8Ki [ = ] 0 .debug_str_offsets
-7.1% -156Ki [ = ] 0 .debug_str
-15.0% -160Ki [ = ] 0 .symtab
-63.6% -245Ki -63.6% -245Ki .relr.dyn
-25.4% -357Ki -25.4% -357Ki .eh_frame
-27.7% -1.09Mi [ = ] 0 .strtab
-59.3% -10.0Mi [ = ] 0 .debug_rnglists
-41.3% -11.0Mi [ = ] 0 .debug_line
-70.0% -12.0Mi -70.0% -12.0Mi .rodata
-65.2% -15.1Mi -65.2% -15.1Mi .data
-53.0% -15.7Mi -53.0% -15.7Mi .text
-41.7% -62.1Mi -57.7% -43.4Mi TOTAL
This commit is contained in:
Daniel Bertalan
Andreas Kling
parent
f0973db6dd
commit
44365074fe
5 changed files with 20 additions and 8 deletions
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@ -192,13 +192,6 @@ include_directories(${CMAKE_CURRENT_BINARY_DIR}/Userland/Services)
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include_directories(${CMAKE_CURRENT_BINARY_DIR}/Userland/Libraries)
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include_directories(${CMAKE_CURRENT_BINARY_DIR}/Userland)
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# FIXME: vptr sanitizing requires.. intense ABI wrangling of std::type_info
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# And would be better served by porting ubsan_type_hash_itanium.cpp from compiler-rt
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if (ENABLE_UNDEFINED_SANITIZER)
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add_compile_options(-fsanitize=undefined -fno-sanitize=vptr)
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add_link_options(-fsanitize=undefined -fno-sanitize=vptr)
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endif()
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add_custom_target(components ALL)
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option(BUILD_EVERYTHING "Build all optional components" ON)
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@ -219,6 +212,17 @@ endif()
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add_subdirectory(AK)
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add_subdirectory(Kernel)
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# FIXME: vptr sanitizing requires.. intense ABI wrangling of std::type_info
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# And would be better served by porting ubsan_type_hash_itanium.cpp from compiler-rt
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if (ENABLE_UNDEFINED_SANITIZER)
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add_compile_options(-fsanitize=undefined -fno-sanitize=vptr)
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add_link_options(-fsanitize=undefined -fno-sanitize=vptr)
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if (UNDEFINED_BEHAVIOR_IS_FATAL)
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add_compile_options(-fno-sanitize-recover=undefined)
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endif()
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endif()
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if (ENABLE_MOLD_LINKER)
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add_link_options(-fuse-ld=mold)
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endif()
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@ -46,7 +46,8 @@ There are some optional features that can be enabled during compilation that are
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- `ENABLE_KERNEL_COVERAGE_COLLECTION`: enables the KCOV API and kernel coverage collection instrumentation. Only useful for coverage guided kernel fuzzing.
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- `ENABLE_USERSPACE_COVERAGE_COLLECTION`: enables coverage collection instrumentation for userspace. Currently only works with a Clang build.
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- `ENABLE_MEMORY_SANITIZER`: enables runtime checks for uninitialized memory accesses in Lagom test cases.
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- `ENABLE_UNDEFINED_SANITIZER`: builds in runtime checks for [undefined behavior](https://en.wikipedia.org/wiki/Undefined_behavior) (like null pointer dereferences and signed integer overflows) in Lagom test cases.
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- `ENABLE_UNDEFINED_SANITIZER`: builds in runtime checks for [undefined behavior](https://en.wikipedia.org/wiki/Undefined_behavior) (like null pointer dereferences and signed integer overflows) in Lagom and the SerenityOS userland.
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- `UNDEFINED_BEHAVIOR_IS_FATAL`: makes all undefined behavior sanitizer errors non-recoverable. This option reduces the performance overhead of `ENABLE_UNDEFINED_SANITIZER`.
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- `ENABLE_COMPILER_EXPLORER_BUILD`: Skip building non-library entities in Lagom (this only applies to Lagom).
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- `ENABLE_FUZZERS`: builds [fuzzers](../Meta/Lagom/ReadMe.md#fuzzing) for various parts of the system.
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- `ENABLE_FUZZERS_LIBFUZZER`: builds Clang libFuzzer-based [fuzzers](../Meta/Lagom/ReadMe.md#fuzzing) for various parts of the system.
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@ -41,6 +41,9 @@ endif()
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if (ENABLE_UNDEFINED_SANITIZER)
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add_compile_options(-fsanitize=undefined -fno-omit-frame-pointer)
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if (UNDEFINED_BEHAVIOR_IS_FATAL)
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add_compile_options(-fno-sanitize-recover=undefined)
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endif()
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add_link_options(-fsanitize=undefined)
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endif()
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@ -9,6 +9,7 @@ endif()
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serenity_option(ENABLE_COMPILETIME_FORMAT_CHECK ON CACHE BOOL "Enable compiletime format string checks")
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serenity_option(ENABLE_UNDEFINED_SANITIZER OFF CACHE BOOL "Enable undefined behavior sanitizer testing in gcc/clang")
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serenity_option(UNDEFINED_BEHAVIOR_IS_FATAL OFF CACHE BOOL "Make undefined behavior sanitizer errors non-recoverable")
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serenity_option(ENABLE_ALL_THE_DEBUG_MACROS OFF CACHE BOOL "Enable all debug macros to validate they still compile")
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serenity_option(ENABLE_ALL_DEBUG_FACILITIES OFF CACHE BOOL "Enable all noisy debug symbols and options. Not recommended for normal developer use")
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@ -119,6 +119,9 @@ endif()
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if (ENABLE_UNDEFINED_SANITIZER)
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add_compile_options(-fsanitize=undefined -fno-omit-frame-pointer)
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if (UNDEFINED_BEHAVIOR_IS_FATAL)
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add_compile_options(-fno-sanitize-recover=undefined)
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endif()
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set(LINKER_FLAGS "${LINKER_FLAGS} -fsanitize=undefined")
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endif()
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