From 777fccbe65f23d8a19bde1a8b69776c9a9209476 Mon Sep 17 00:00:00 2001
From: Alexey Samsonov <samsonov@google.com>
Date: Tue, 26 Mar 2013 07:49:46 +0000
Subject: Add CMake option
 LLVM_USE_SANITIZER={Address,Memory,MemoryWithOrigins} to simplify bootstrap
 of LLVM/Clang under ASan/MSan

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177992 91177308-0d34-0410-b5e6-96231b3b80d8
---
 cmake/modules/HandleLLVMOptions.cmake | 45 ++++++++++++++++++++++++++++++++---
 1 file changed, 42 insertions(+), 3 deletions(-)

(limited to 'cmake')

diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake
index 528320b94e..4e59a3e3d9 100644
--- a/cmake/modules/HandleLLVMOptions.cmake
+++ b/cmake/modules/HandleLLVMOptions.cmake
@@ -60,9 +60,9 @@ else(WIN32)
 endif(WIN32)
 
 function(add_flag_or_print_warning flag)
-  check_c_compiler_flag(${flag} C_SUPPORTS_${flag})
-  check_cxx_compiler_flag(${flag} CXX_SUPPORTS_${flag})
-  if (C_SUPPORTS_${flag} AND CXX_SUPPORTS_${flag})
+  check_c_compiler_flag(${flag} C_SUPPORTS_FLAG)
+  check_cxx_compiler_flag(${flag} CXX_SUPPORTS_FLAG)
+  if (C_SUPPORTS_FLAG AND CXX_SUPPORTS_FLAG)
     message(STATUS "Building with ${flag}")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" PARENT_SCOPE)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" PARENT_SCOPE)
@@ -85,6 +85,13 @@ function(append_if condition value)
   endif()
 endfunction()
 
+macro(add_flag_if_supported flag)
+  check_c_compiler_flag(${flag} C_SUPPORTS_FLAG)
+  append_if(C_SUPPORTS_FLAG "${flag}" CMAKE_C_FLAGS)
+  check_cxx_compiler_flag(${flag} CXX_SUPPORTS_FLAG)
+  append_if(CXX_SUPPORTS_FLAG "${flag}" CMAKE_CXX_FLAGS)
+endmacro()
+
 if( LLVM_ENABLE_PIC )
   if( XCODE )
     # Xcode has -mdynamic-no-pic on by default, which overrides -fPIC. I don't
@@ -223,6 +230,38 @@ elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE )
   endif (LLVM_ENABLE_WERROR)
 endif( MSVC )
 
+macro(append_common_sanitizer_flags)
+  # Append -fno-omit-frame-pointer and turn on debug info to get better
+  # stack traces.
+  add_flag_if_supported("-fno-omit-frame-pointer")
+  if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND
+      NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
+    add_flag_if_supported("-gline-tables-only")
+  endif()
+endmacro()
+
+# Turn on sanitizers if necessary.
+if(LLVM_USE_SANITIZER)
+  if (LLVM_ON_UNIX)
+    if (LLVM_USE_SANITIZER STREQUAL "Address")
+      append_common_sanitizer_flags()
+      add_flag_or_print_warning("-fsanitize=address")
+    elseif (LLVM_USE_SANITIZER MATCHES "Memory(WithOrigins)?")
+      append_common_sanitizer_flags()
+      add_flag_or_print_warning("-fsanitize=memory")
+      # -pie is required for MSan.
+      set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pie")
+      if(LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins")
+        add_flag_or_print_warning("-fsanitize-memory-track-origins")
+      endif()
+    else()
+      message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}")
+    endif()
+  else()
+    message(WARNING "LLVM_USE_SANITIZER is not supported on this platform.")
+  endif()
+endif()
+
 add_llvm_definitions( -D__STDC_CONSTANT_MACROS )
 add_llvm_definitions( -D__STDC_FORMAT_MACROS )
 add_llvm_definitions( -D__STDC_LIMIT_MACROS )
-- 
cgit v1.2.3-18-g5258