diff options
| author | Petr Hosek <phosek@chromium.org> | 2017-07-25 23:38:25 +0000 |
|---|---|---|
| committer | Petr Hosek <phosek@chromium.org> | 2017-07-25 23:38:25 +0000 |
| commit | fd63314d6770e0da62572a3fea2c41c4cc0fc58a (patch) | |
| tree | 9c3600f45b806aafae26485cc388c30e30cec72e /cmake | |
| parent | 5d89c4be98863f7456a8c2c1936d768cc55f5c66 (diff) | |
[sanitizer] Support compiler-rt builtins
This change adds support for compiler-rt builtins as an alternative
compiler runtime to libgcc.
Differential Revision: https://reviews.llvm.org/D35165
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@309060 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'cmake')
| -rw-r--r-- | cmake/Modules/HandleCompilerRT.cmake | 21 | ||||
| -rw-r--r-- | cmake/config-ix.cmake | 22 |
2 files changed, 42 insertions, 1 deletions
diff --git a/cmake/Modules/HandleCompilerRT.cmake b/cmake/Modules/HandleCompilerRT.cmake new file mode 100644 index 000000000..cff5031ec --- /dev/null +++ b/cmake/Modules/HandleCompilerRT.cmake @@ -0,0 +1,21 @@ +function(find_compiler_rt_library name dest) + set(dest "" PARENT_SCOPE) + set(CLANG_COMMAND ${CMAKE_CXX_COMPILER} ${SANITIZER_COMMON_CFLAGS} + "--rtlib=compiler-rt" "--print-libgcc-file-name") + if (CMAKE_CXX_COMPILER_ID MATCHES Clang AND CMAKE_CXX_COMPILER_TARGET) + list(APPEND CLANG_COMMAND "--target=${CMAKE_CXX_COMPILER_TARGET}") + endif() + execute_process( + COMMAND ${CLANG_COMMAND} + RESULT_VARIABLE HAD_ERROR + OUTPUT_VARIABLE LIBRARY_FILE + ) + string(STRIP "${LIBRARY_FILE}" LIBRARY_FILE) + string(REPLACE "builtins" "${name}" LIBRARY_FILE "${LIBRARY_FILE}") + if (NOT HAD_ERROR AND EXISTS "${LIBRARY_FILE}") + message(STATUS "Found compiler-rt ${name} library: ${LIBRARY_FILE}") + set(${dest} "${LIBRARY_FILE}" PARENT_SCOPE) + else() + message(STATUS "Failed to find compiler-rt ${name} library") + endif() +endfunction() diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake index c329c6a97..64c1347c6 100644 --- a/cmake/config-ix.cmake +++ b/cmake/config-ix.cmake @@ -1,4 +1,5 @@ include(CMakePushCheckState) +include(CheckCCompilerFlag) include(CheckCXXCompilerFlag) include(CheckLibraryExists) include(CheckSymbolExists) @@ -11,6 +12,26 @@ function(check_linker_flag flag out_var) cmake_pop_check_state() endfunction() +check_library_exists(c fopen "" COMPILER_RT_HAS_LIBC) +if (NOT SANITIZER_USE_COMPILER_RT) + check_library_exists(gcc_s __gcc_personality_v0 "" COMPILER_RT_HAS_GCC_S_LIB) +endif() + +check_c_compiler_flag(-nodefaultlibs COMPILER_RT_HAS_NODEFAULTLIBS_FLAG) +if (COMPILER_RT_HAS_NODEFAULTLIBS_FLAG) + set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -nodefaultlibs") + if (COMPILER_RT_HAS_LIBC) + list(APPEND CMAKE_REQUIRED_LIBRARIES c) + endif () + if (SANITIZER_USE_COMPILER_RT) + list(APPEND CMAKE_REQUIRED_FLAGS -rtlib=compiler-rt) + find_compiler_rt_library(builtins COMPILER_RT_BUILTINS_LIBRARY) + list(APPEND CMAKE_REQUIRED_LIBRARIES "${COMPILER_RT_BUILTINS_LIBRARY}") + elseif (COMPILER_RT_HAS_GCC_S_LIB) + list(APPEND CMAKE_REQUIRED_LIBRARIES gcc_s) + endif () +endif () + # CodeGen options. check_cxx_compiler_flag(-fPIC COMPILER_RT_HAS_FPIC_FLAG) check_cxx_compiler_flag(-fPIE COMPILER_RT_HAS_FPIE_FLAG) @@ -73,7 +94,6 @@ check_cxx_compiler_flag(/wd4800 COMPILER_RT_HAS_WD4800_FLAG) check_symbol_exists(__func__ "" COMPILER_RT_HAS_FUNC_SYMBOL) # Libraries. -check_library_exists(c fopen "" COMPILER_RT_HAS_LIBC) check_library_exists(dl dlopen "" COMPILER_RT_HAS_LIBDL) check_library_exists(rt shm_open "" COMPILER_RT_HAS_LIBRT) check_library_exists(m pow "" COMPILER_RT_HAS_LIBM) |