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Build ASan runtime library with -z global on Android. 

llvm-svn: 236537
This commit is contained in:
Evgeniy Stepanov 2015-05-05 20:13:39 +00:00
parent 85a0e23bc8
commit 91960900f8
3 changed files with 28 additions and 2 deletions
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4
compiler-rt/cmake/Modules/AddCompilerRT.cmake
View File

@ -47,13 +47,13 @@ endmacro()
# OUTPUT_NAME <output library name>)
macro(add_compiler_rt_runtime name arch type)
if(CAN_TARGET_${arch})
parse_arguments(LIB "SOURCES;CFLAGS;DEFS;OUTPUT_NAME" "" ${ARGN})
parse_arguments(LIB "SOURCES;CFLAGS;LINKFLAGS;DEFS;OUTPUT_NAME" "" ${ARGN})
add_library(${name} ${type} ${LIB_SOURCES})
# Setup compile flags and definitions.
set_target_compile_flags(${name}
${TARGET_${arch}_CFLAGS} ${LIB_CFLAGS})
set_target_link_flags(${name}
${TARGET_${arch}_CFLAGS} ${LIB_CFLAGS})
${TARGET_${arch}_CFLAGS} ${LIB_CFLAGS} ${LIB_LINKFLAGS})
set_property(TARGET ${name} APPEND PROPERTY
COMPILE_DEFINITIONS ${LIB_DEFS})
# Setup correct output directory in the build tree.

12
compiler-rt/cmake/config-ix.cmake
View File

@ -4,6 +4,13 @@ include(CheckLibraryExists)
include(CheckSymbolExists)
include(TestBigEndian)
function(check_linker_flag flag out_var)
cmake_push_check_state()
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${flag}")
check_cxx_compiler_flag("" ${out_var})
cmake_pop_check_state()
endfunction()
# CodeGen options.
check_cxx_compiler_flag(-fPIC COMPILER_RT_HAS_FPIC_FLAG)
check_cxx_compiler_flag(-fPIE COMPILER_RT_HAS_FPIE_FLAG)
@ -59,6 +66,11 @@ check_library_exists(m pow "" COMPILER_RT_HAS_LIBM)
check_library_exists(pthread pthread_create "" COMPILER_RT_HAS_LIBPTHREAD)
check_library_exists(stdc++ __cxa_throw "" COMPILER_RT_HAS_LIBSTDCXX)
# Linker flags.
if(ANDROID)
check_linker_flag("-Wl,-z,global" COMPILER_RT_HAS_Z_GLOBAL)
endif()
# Architectures.
# List of all architectures we can target.

14
compiler-rt/lib/asan/CMakeLists.txt
View File

@ -37,9 +37,22 @@ append_no_rtti_flag(ASAN_CFLAGS)
set(ASAN_COMMON_DEFINITIONS
ASAN_HAS_EXCEPTIONS=1)
set(ASAN_DYNAMIC_LINK_FLAGS)
if(ANDROID)
list(APPEND ASAN_COMMON_DEFINITIONS
ASAN_LOW_MEMORY=1)
# On Android, -z global does not do what it is documented to do.
# On Android, -z global moves the library ahead in the lookup order,
# placing it right after the LD_PRELOADs. This is used to compensate for the fact
# that Android linker does not look at the dependencies of the main executable
# that aren't dependencies of the current DSO when resolving symbols from said DSO.
# As a net result, this allows running ASan executables without LD_PRELOAD-ing the
# ASan runtime library.
# The above is applicable to L MR1 or newer.
if (COMPILER_RT_HAS_Z_GLOBAL)
list(APPEND ASAN_DYNAMIC_LINK_FLAGS -Wl,-z,global)
endif()
endif()
set(ASAN_DYNAMIC_DEFINITIONS
@ -143,6 +156,7 @@ else()
$<TARGET_OBJECTS:RTUbsan_cxx.${arch}>
${ASAN_COMMON_RUNTIME_OBJECTS}
CFLAGS ${ASAN_DYNAMIC_CFLAGS}
LINKFLAGS ${ASAN_DYNAMIC_LINK_FLAGS}
DEFS ${ASAN_DYNAMIC_DEFINITIONS})
target_link_libraries(clang_rt.asan-dynamic-${arch} ${ASAN_DYNAMIC_LIBS})
add_dependencies(asan clang_rt.asan-dynamic-${arch})