[sanitizer] Support libc++abi in addition to libstdc++

This change adds sanitizer support for LLVM's libunwind and libc++abi
as an alternative to libstdc++. This allows using the in tree version
of libunwind and libc++abi which is useful when building a toolchain
for different target.

Differential Revision: https://reviews.llvm.org/D34501

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@309074 91177308-0d34-0410-b5e6-96231b3b80d8

Author: petrhosek

CMakeLists.txt

@@ -94,6 +94,40 @@ endif()
 option(SANITIZER_CAN_USE_CXXABI "Sanitizers can use cxxabi" ${use_cxxabi_default})
 pythonize_bool(SANITIZER_CAN_USE_CXXABI)
 
+set(SANITIZER_CXX_ABI "default" CACHE STRING
+    "Specify C++ ABI library to use.")
+set(CXXABIS none default libcxxabi libstdc++)
+set_property(CACHE SANITIZER_CXX_ABI PROPERTY STRINGS ;${CXXABIS})
+
+if (SANITIZER_CXX_ABI STREQUAL "default")
+  if (HAVE_LIBCXXABI AND COMPILER_RT_DEFAULT_TARGET_ONLY)
+    set(SANITIZER_CXX_ABI_LIBNAME "libcxxabi")
+    set(SANITIZER_CXX_ABI_INTREE 1)
+  elseif (APPLE)
+    set(SANITIZER_CXX_ABI_LIBNAME "libcxxabi")
+    set(SANITIZER_CXX_ABI_SYSTEM 1)
+  else()
+    set(SANITIZER_CXX_ABI_LIBNAME "libstdc++")
+  endif()
+elseif()
+  set(SANITIZER_CXX_ABI_LIBNAME "${SANITIZER_CXX_ABI}")
+endif()
+
+if (SANITIZER_CXX_ABI_LIBNAME STREQUAL "libcxxabi")
+  if (SANITIZER_CXX_ABI_INTREE)
+    if (TARGET unwind_shared OR HAVE_LIBUNWIND)
+      list(APPEND SANITIZER_CXX_ABI_LIBRARY unwind_shared)
+    endif()
+    if (TARGET cxxabi_shared OR HAVE_LIBCXXABI)
+      list(APPEND SANITIZER_CXX_ABI_LIBRARY cxxabi_shared)
+    endif()
+  else()
+    list(APPEND SANITIZER_CXX_ABI_LIBRARY "c++abi")
+  endif()
+elseif (SANITIZER_CXX_ABI_LIBNAME STREQUAL "libstdc++")
+  append_list_if(COMPILER_RT_HAS_LIBSTDCXX stdc++ SANITIZER_CXX_ABI_LIBRARY)
+endif()
+
 option(SANITIZER_USE_COMPILER_RT "Use compiler-rt builtins instead of libgcc" OFF)
 
 #================================

lib/asan/CMakeLists.txt

@@ -71,9 +71,10 @@ append_list_if(COMPILER_RT_HAS_LIBDL dl ASAN_DYNAMIC_LIBS)
 append_list_if(COMPILER_RT_HAS_LIBRT rt ASAN_DYNAMIC_LIBS)
 append_list_if(COMPILER_RT_HAS_LIBM m ASAN_DYNAMIC_LIBS)
 append_list_if(COMPILER_RT_HAS_LIBPTHREAD pthread ASAN_DYNAMIC_LIBS)
-append_list_if(COMPILER_RT_HAS_LIBSTDCXX stdc++ ASAN_DYNAMIC_LIBS)
 append_list_if(COMPILER_RT_HAS_LIBLOG log ASAN_DYNAMIC_LIBS)
 
+list(APPEND ASAN_DYNAMIC_LIBS ${SANITIZER_CXX_ABI_LIBRARY})
+
 # Compile ASan sources into an object library.
 
 add_compiler_rt_object_libraries(RTAsan_dynamic

lib/tsan/dd/CMakeLists.txt

@@ -15,7 +15,8 @@ set(DD_LINKLIBS ${SANITIZER_COMMON_LINK_LIBS})
 append_list_if(COMPILER_RT_HAS_LIBDL dl DD_LINKLIBS)
 append_list_if(COMPILER_RT_HAS_LIBRT rt DD_LINKLIBS)
 append_list_if(COMPILER_RT_HAS_LIBPTHREAD pthread DD_LINKLIBS)
-append_list_if(COMPILER_RT_HAS_LIBSTDCXX stdc++ DD_LINKLIBS)
+
+list(APPEND DD_LINKLIBS ${SANITIZER_CXX_ABI_LIBRARY})
 
 add_custom_target(dd)
 # Deadlock detector is currently supported on 64-bit Linux only.

lib/ubsan/CMakeLists.txt

@@ -39,7 +39,8 @@ set(UBSAN_DYNAMIC_LIBS ${SANITIZER_COMMON_LINK_LIBS})
 append_list_if(COMPILER_RT_HAS_LIBDL dl UBSAN_DYNAMIC_LIBS)
 append_list_if(COMPILER_RT_HAS_LIBRT rt UBSAN_DYNAMIC_LIBS)
 append_list_if(COMPILER_RT_HAS_LIBPTHREAD pthread UBSAN_DYNAMIC_LIBS)
-append_list_if(COMPILER_RT_HAS_LIBSTDCXX stdc++ UBSAN_DYNAMIC_LIBS)
+
+list(APPEND UBSAN_DYNAMIC_LIBS ${SANITIZER_CXX_ABI_LIBRARY})
 
 add_compiler_rt_component(ubsan)