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Meta: Enable RTTI for Userspace programs

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RTTI is still disabled for the Kernel, and for the Dynamic Loader. This
allows for much less awkward navigation of class heirarchies in LibCore,
LibGUI, LibWeb, and LibJS (eventually). Measured RootFS size increase
was < 1%, and libgui.so binary size was ~3.3%. The small binary size
increase here seems worth it :^)
This commit is contained in:
Andrew Kaster 2021-01-01 06:12:20 -07:00 committed by Andreas Kling
parent 43908db594
commit 350d4d3543
Notes: sideshowbarker 2024-07-19 00:16:40 +09:00 
Author: https://github.com/ADKaster
Commit: https://github.com/SerenityOS/serenity/commit/350d4d3543a
Pull-request: https://github.com/SerenityOS/serenity/pull/4714
4 changed files with 4 additions and 4 deletions
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2
CMakeLists.txt
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@ -127,7 +127,7 @@ endif()
#FIXME: -fstack-protector #FIXME: -fstack-protector
add_compile_options(-Os -g1 -fno-exceptions -fno-rtti -Wno-address-of-packed-member -Wundef -Wcast-qual -Wwrite-strings -Wimplicit-fallthrough -Wno-nonnull-compare -Wno-deprecated-copy -Wno-expansion-to-defined) add_compile_options(-Os -g1 -fno-exceptions -Wno-address-of-packed-member -Wundef -Wcast-qual -Wwrite-strings -Wimplicit-fallthrough -Wno-nonnull-compare -Wno-deprecated-copy -Wno-expansion-to-defined)
add_compile_options(-ffile-prefix-map=${CMAKE_SOURCE_DIR}=.) add_compile_options(-ffile-prefix-map=${CMAKE_SOURCE_DIR}=.)
add_compile_definitions(DEBUG SANITIZE_PTRS) add_compile_definitions(DEBUG SANITIZE_PTRS)

2
Kernel/CMakeLists.txt
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@ -261,7 +261,7 @@ set(SOURCES
) )
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unknown-warning-option -DKERNEL") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unknown-warning-option -DKERNEL")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pie -fPIE -ffreestanding -fbuiltin") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pie -fPIE -fno-rtti -ffreestanding -fbuiltin")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mno-80387 -mno-mmx -mno-sse -mno-sse2") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mno-80387 -mno-mmx -mno-sse -mno-sse2")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-asynchronous-unwind-tables") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-asynchronous-unwind-tables")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -nostdlib -nostdinc -nostdinc++") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -nostdlib -nostdinc -nostdinc++")

2
Toolchain/CMakeToolchain.txt
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@ -8,7 +8,7 @@ if (NOT DEFINED ENV{SERENITY_ROOT})
message(FATAL_ERROR "SERENITY_ROOT not set.") message(FATAL_ERROR "SERENITY_ROOT not set.")
endif() endif()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti -fno-exceptions") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions")
# where to read from/write to # where to read from/write to
set(CMAKE_SYSROOT $ENV{SERENITY_ROOT}/Build/Root) set(CMAKE_SYSROOT $ENV{SERENITY_ROOT}/Build/Root)

2
Userland/DynamicLoader/CMakeLists.txt
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@ -16,7 +16,7 @@ list(FILTER LIBC_SOURCES1 EXCLUDE REGEX ".+crt0.+.cpp")
set(SOURCES ${LOADER_SOURCES} ${AK_SOURCES} ${ELF_SOURCES} ${LIBC_SOURCES1} ${LIBC_SOURCES2} ${LIBC_SOURCES3}) set(SOURCES ${LOADER_SOURCES} ${AK_SOURCES} ${ELF_SOURCES} ${LIBC_SOURCES1} ${LIBC_SOURCES2} ${LIBC_SOURCES3})
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -nostdlib -pie -fpic -DNO_TLS") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti -nostdlib -pie -fpic -DNO_TLS")
add_executable(Loader.so ${SOURCES}) add_executable(Loader.so ${SOURCES})
target_link_options(Loader.so PRIVATE LINKER:--no-dynamic-linker) target_link_options(Loader.so PRIVATE LINKER:--no-dynamic-linker)