CMake: Add option for Clang MSan.

.ci/clang.sh

@@ -2,8 +2,13 @@
 
 sudo pip install cpp-coveralls
 
-# Use custom Clang and enable ASAN on Linux.
+# Use custom Clang and enable sanitizers on Linux.
 if [ "$TRAVIS_OS_NAME" = "linux" ]; then
+	if [ -z "$CLANG_SANITIZER" ]; then
+		echo "CLANG_SANITIZER not set."
+		exit 1
+	fi
+
 	clang_version=3.4.2
 	clang_suffix=x86_64-unknown-ubuntu12.04.xz
 	if [ ! -d /usr/local/clang-$clang_version ]; then
@@ -15,13 +20,14 @@ if [ "$TRAVIS_OS_NAME" = "linux" ]; then
 	export CC=/usr/local/clang-$clang_version/bin/clang
 	symbolizer=/usr/local/clang-$clang_version/bin/llvm-symbolizer
 	export ASAN_SYMBOLIZER_PATH=$symbolizer
+	export MSAN_SYMBOLIZER_PATH=$symbolizer
 	export ASAN_OPTIONS="detect_leaks=1:log_path=$tmpdir/asan"
 	export TSAN_OPTIONS="external_symbolizer_path=$symbolizer:log_path=$tmpdir/tsan"
 	export UBSAN_OPTIONS="log_path=$tmpdir/ubsan" # not sure if this works
 	CMAKE_EXTRA_FLAGS="-DTRAVIS_CI_BUILD=ON \
 		-DUSE_GCOV=ON \
 		-DBUSTED_OUTPUT_TYPE=plainTerminal \
-		-DSANITIZE=ON"
+		-DCLANG_${CLANG_SANITIZER}=ON"
 else
 	CMAKE_EXTRA_FLAGS="-DTRAVIS_CI_BUILD=ON \
 		-DUSE_GCOV=ON \

.travis.yml

@@ -20,13 +20,16 @@ env:
     # Force verification of DLOG macros.
     - CFLAGS='-DMIN_LOG_LEVEL=0'
   matrix:
-    - CI_TARGET=clang
     - CI_TARGET=gcc
     - CI_TARGET=gcc-32
     - CI_TARGET=clint
     - CI_TARGET=mingw
 matrix:
   include:
+    - os: linux
+      env: CI_TARGET=clang CLANG_SANITIZER=ASAN
+    - os: linux
+      env: CI_TARGET=clang CLANG_SANITIZER=MSAN
     - os: osx
       env: CI_TARGET=clang
       compiler: clang

CMakeLists.txt

@@ -191,13 +191,18 @@ include_directories(SYSTEM ${LIBTERMKEY_INCLUDE_DIRS})
 find_package(LibVterm REQUIRED)
 include_directories(SYSTEM ${LIBVTERM_INCLUDE_DIRS})
 
-option(SANITIZE "Enable Clang sanitizers for nvim binary" OFF)
-if(SANITIZE AND NOT CMAKE_C_COMPILER_ID MATCHES "Clang")
-  message(WARNING "SANITIZE is only supported for Clang, disabling")
-  set(SANITIZE OFF)
+option(CLANG_ASAN "Enable Clang address sanitizer for nvim binary." OFF)
+option(CLANG_MSAN "Enable Clang memory sanitizer for nvim binary." OFF)
+if(CLANG_ASAN AND CLANG_MSAN)
+  message(FATAL_ERROR "CLANG_ASAN and CLANG_MSAN cannot be enabled simultaneously.")
+endif()
+if((CLANG_ASAN OR CLANG_MSAN) AND NOT CMAKE_C_COMPILER_ID MATCHES "Clang")
+  message(FATAL_ERROR "Sanitizers are only supported for Clang.")
 endif()
 
-if(NOT SANITIZE)
+if(CLANG_ASAN OR CLANG_MSAN)
+  message(STATUS "Sanitizers have been enabled; don't use jemalloc.")
+else()
   find_package(JeMalloc)
   if(JEMALLOC_FOUND)
     include_directories(SYSTEM ${JEMALLOC_INCLUDE_DIRS})

src/nvim/CMakeLists.txt

@@ -95,7 +95,7 @@ foreach(gen_cdef ${gen_cdefs} DO_NOT_DEFINE_EMPTY_ATTRIBUTES)
     list(APPEND gen_cflags "-D${gen_cdef}")
   endif()
 endforeach()
-if (SANITIZE)
+if(CLANG_ASAN)
   list(APPEND gen_cflags "-DEXITFREE")
 endif()
 
@@ -190,11 +190,15 @@ add_executable(nvim ${NEOVIM_GENERATED_SOURCES} ${NEOVIM_SOURCES}
 target_link_libraries(nvim ${NVIM_EXEC_LINK_LIBRARIES})
 install_helper(TARGETS nvim)
 
-if(SANITIZE)
-  message(STATUS "Enabling Clang sanitizers for nvim")
+if(CLANG_ASAN)
+  message(STATUS "Enabling Clang address sanitizer for nvim.")
   set_property(TARGET nvim APPEND_STRING PROPERTY COMPILE_FLAGS "-DEXITFREE ")
   set_property(TARGET nvim APPEND_STRING PROPERTY COMPILE_FLAGS "-fno-sanitize-recover -fno-omit-frame-pointer -fno-optimize-sibling-calls -fsanitize=address -fsanitize=undefined ")
   set_property(TARGET nvim APPEND_STRING PROPERTY LINK_FLAGS "-fsanitize=address -fsanitize=undefined ")
+elseif(CLANG_MSAN)
+  message(STATUS "Enabling Clang memory sanitizer for nvim.")
+  set_property(TARGET nvim APPEND_STRING PROPERTY COMPILE_FLAGS "-fsanitize=memory -fsanitize-memory-track-origins -fno-omit-frame-pointer -fno-optimize-sibling-calls ")
+  set_property(TARGET nvim APPEND_STRING PROPERTY LINK_FLAGS "-fsanitize=memory -fsanitize-memory-track-origins ")
 endif()
 
 add_library(libnvim STATIC EXCLUDE_FROM_ALL ${NEOVIM_GENERATED_SOURCES}