Spectre mitigation for gcc and clang

Resolves: NEO-3038
#159

Change-Id: If464949242afa6fbca85a0533eb874f276164646
Signed-off-by: Jacek Danecki <[email protected]>

Author: JacekDanecki

CMakeLists.txt

@@ -540,16 +540,44 @@ if(MSVC)
 endif()
 
 # spectre mitigation
+include(CheckCXXCompilerFlag)
 if(MSVC)
-	include(CheckCXXCompilerFlag)
 	check_cxx_compiler_flag(/Qspectre COMPILER_SUPPORTS_QSPECTRE)
 	check_cxx_compiler_flag(/d2guardspecload COMPILER_SUPPORTS_D2GUARDSPECLOAD)
 	if(COMPILER_SUPPORTS_QSPECTRE)
 		SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /Qspectre")
 	elseif(COMPILER_SUPPORTS_D2GUARDSPECLOAD)
 		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /d2guardspecload")
 	else()
-		message(STATUS "Spectre mitigation is not supported by the compiler")
+		message(WARNING "Spectre mitigation is not supported by the compiler")
+	endif()
+else()
+	if(${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang")
+		check_cxx_compiler_flag(-mretpoline COMPILER_SUPPORTS_RETPOLINE)
+		if(COMPILER_SUPPORTS_RETPOLINE)
+			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mretpoline")
+		else()
+			message(WARNING "Spectre mitigation -mretpoline flag is not supported by the compiler")
+		endif()
+	else()
+		check_cxx_compiler_flag(-mindirect-branch=thunk COMPILER_SUPPORTS_INDIRECT_BRANCH_THUNK)
+		if(COMPILER_SUPPORTS_INDIRECT_BRANCH_THUNK)
+			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mindirect-branch=thunk")
+		else()
+			message(WARNING "Spectre mitigation -mindirect-branch=thunk flag is not supported by the compiler")
+		endif()
+		check_cxx_compiler_flag(-mfunction-return=thunk COMPILER_SUPPORTS_FUNCTION_RETURN_THUNK)
+		if(COMPILER_SUPPORTS_FUNCTION_RETURN_THUNK)
+			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mfunction-return=thunk")
+		else()
+			message(WARNING "Spectre mitigation -mfunction-return=thunk flag is not supported by the compiler")
+		endif()
+		check_cxx_compiler_flag(-mindirect-branch-register COMPILER_SUPPORTS_INDIRECT_BRANCH_REGISTER)
+		if(COMPILER_SUPPORTS_INDIRECT_BRANCH_REGISTER)
+			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mindirect-branch-register")
+		else()
+			message(WARNING "Spectre mitigation -mindirect-branch-register flag is not supported by the compiler")
+		endif()
 	endif()
 endif(MSVC)
 

scripts/docker/Dockerfile-fedora-28-copr-gcc-8

@@ -11,6 +11,7 @@ RUN dnf install -y gcc-c++ cmake ninja-build git pkg-config; \
     dnf copr enable -y arturh/intel-opencl; \
     dnf --showduplicate list intel-igc-opencl-devel intel-gmmlib-devel; \
     dnf install -y intel-igc-opencl-devel intel-gmmlib-devel; \
-    mkdir /root/build; cd /root/build ; cmake -G Ninja ../neo; \
+    mkdir /root/build; cd /root/build ; cmake -G Ninja \
+    -DDO_NOT_RUN_AUB_TESTS=1 -DDONT_CARE_OF_VIRTUALS=1 ../neo; \
     ninja -j `nproc`
 CMD ["/bin/bash"]

scripts/docker/Dockerfile-fedora-29-copr-gcc-8

@@ -11,6 +11,7 @@ RUN dnf install -y gcc-c++ cmake ninja-build git pkg-config; \
     dnf copr enable -y arturh/intel-opencl; \
     dnf --showduplicate list intel-igc-opencl-devel intel-gmmlib-devel; \
     dnf install -y intel-igc-opencl-devel intel-gmmlib-devel; \
-    mkdir /root/build; cd /root/build ; cmake -G Ninja ../neo; \
+    mkdir /root/build; cd /root/build ; cmake -G Ninja \
+    -DDO_NOT_RUN_AUB_TESTS=1 -DDONT_CARE_OF_VIRTUALS=1 ../neo; \
     ninja -j `nproc`
 CMD ["/bin/bash"]