[sanitizer] Use -Wl,-z,global on Android for sanitizers except UBsan

[srhines]

Summary

This essentially reverts r337010 since it breaks UBSan, which is used
for a few platform libraries. The "-z global" flag is now added for
Scudo as well. The only other sanitizer shared libraries are for asan
and hwasan, which have also been reinstated to use the global flag.

[cryptoad]

Thanks!

compiler-rt/trunk/CMakeLists.txt

if (ANDROID)
     append_list_if(COMPILER_RT_HAS_GCC_LIB gcc SANITIZER_COMMON_LINK_LIBS)
   else()
     append_list_if(COMPILER_RT_HAS_GCC_S_LIB gcc_s SANITIZER_COMMON_LINK_LIBS)
   endif()
 endif()
 
 append_list_if(COMPILER_RT_HAS_LIBC c SANITIZER_COMMON_LINK_LIBS)
 
-if(ANDROID)
-# Put the Sanitizer shared libraries in the global group. For more details, see
-# android-changes-for-ndk-developers.md#changes-to-library-search-order
-  if (COMPILER_RT_HAS_Z_GLOBAL)
-    list(APPEND SANITIZER_COMMON_LINK_FLAGS -Wl,-z,global)
-  endif()
-endif()
-
 if("${CMAKE_SYSTEM_NAME}" STREQUAL "Fuchsia")
   list(APPEND SANITIZER_COMMON_LINK_FLAGS -Wl,-z,defs,-z,now,-z,relro)
   list(APPEND SANITIZER_COMMON_LINK_LIBS zircon)
 endif()
 
 if (SANITIZER_CXX_ABI_LIBNAME STREQUAL "libc++")
   if (SANITIZER_CXX_ABI_INTREE)
     if (NOT LIBCXXABI_ENABLE_STATIC_UNWINDER AND (TARGET unwind_shared OR HAVE_LIBUNWIND))

compiler-rt/trunk/lib/asan/CMakeLists.txt

 
 set(ASAN_CFLAGS ${SANITIZER_COMMON_CFLAGS})
 set(ASAN_COMMON_DEFINITIONS ${COMPILER_RT_ASAN_SHADOW_SCALE_DEFINITION})
 
 append_rtti_flag(OFF ASAN_CFLAGS)
 
 set(ASAN_DYNAMIC_LINK_FLAGS ${SANITIZER_COMMON_LINK_FLAGS})
 
+if(ANDROID)
+# Put most Sanitizer shared libraries in the global group. For more details, see
+# android-changes-for-ndk-developers.md#changes-to-library-search-order
+  if (COMPILER_RT_HAS_Z_GLOBAL)
+    list(APPEND ASAN_DYNAMIC_LINK_FLAGS -Wl,-z,global)
+  endif()
+endif()
+
 set(ASAN_DYNAMIC_DEFINITIONS
   ${ASAN_COMMON_DEFINITIONS} ASAN_DYNAMIC=1)
 append_list_if(WIN32 INTERCEPTION_DYNAMIC_CRT ASAN_DYNAMIC_DEFINITIONS)
 
 set(ASAN_DYNAMIC_CFLAGS ${ASAN_CFLAGS})
 append_list_if(COMPILER_RT_HAS_FTLS_MODEL_INITIAL_EXEC
   -ftls-model=initial-exec ASAN_DYNAMIC_CFLAGS)
 append_list_if(MSVC /DEBUG ASAN_DYNAMIC_LINK_FLAGS)

compiler-rt/trunk/lib/hwasan/CMakeLists.txt

 set(HWASAN_RTL_CFLAGS ${SANITIZER_COMMON_CFLAGS})
 append_rtti_flag(OFF HWASAN_RTL_CFLAGS)
 append_list_if(COMPILER_RT_HAS_FPIC_FLAG -fPIC HWASAN_RTL_CFLAGS)
 # Prevent clang from generating libc calls.
 append_list_if(COMPILER_RT_HAS_FFREESTANDING_FLAG -ffreestanding HWASAN_RTL_CFLAGS)
 
 set(HWASAN_DYNAMIC_LINK_FLAGS ${SANITIZER_COMMON_LINK_FLAGS})
 
+if(ANDROID)
+# Put most Sanitizer shared libraries in the global group. For more details, see
+# android-changes-for-ndk-developers.md#changes-to-library-search-order
+  if (COMPILER_RT_HAS_Z_GLOBAL)
+    list(APPEND HWASAN_DYNAMIC_LINK_FLAGS -Wl,-z,global)
+  endif()
+endif()
+
 set(HWASAN_DYNAMIC_CFLAGS ${HWASAN_RTL_CFLAGS})
 append_list_if(COMPILER_RT_HAS_FTLS_MODEL_INITIAL_EXEC
   -ftls-model=initial-exec HWASAN_DYNAMIC_CFLAGS)
 append_list_if(MSVC /DEBUG HWASAN_DYNAMIC_LINK_FLAGS)
 
 set(HWASAN_DYNAMIC_LIBS ${SANITIZER_CXX_ABI_LIBRARY} ${SANITIZER_COMMON_LINK_LIBS})
 
 append_list_if(COMPILER_RT_HAS_LIBDL dl HWASAN_DYNAMIC_LIBS)

compiler-rt/trunk/lib/scudo/CMakeLists.txt

 append_list_if(COMPILER_RT_HAS_LIBRT rt SCUDO_MINIMAL_DYNAMIC_LIBS)
 append_list_if(COMPILER_RT_HAS_LIBPTHREAD pthread SCUDO_MINIMAL_DYNAMIC_LIBS)
 append_list_if(COMPILER_RT_HAS_LIBLOG log SCUDO_MINIMAL_DYNAMIC_LIBS)
 
 set(SCUDO_DYNAMIC_LINK_FLAGS ${SANITIZER_COMMON_LINK_FLAGS})
 # Use gc-sections by default to avoid unused code being pulled in.
 list(APPEND SCUDO_DYNAMIC_LINK_FLAGS -Wl,--gc-sections)
 
+if(ANDROID)
+# Put most Sanitizer shared libraries in the global group. For more details, see
+# android-changes-for-ndk-developers.md#changes-to-library-search-order
+  if (COMPILER_RT_HAS_Z_GLOBAL)
+    list(APPEND SCUDO_DYNAMIC_LINK_FLAGS -Wl,-z,global)
+  endif()
+endif()
+
 # The minimal Scudo runtime does not inlude the UBSan runtime.
 set(SCUDO_MINIMAL_OBJECT_LIBS
   RTSanitizerCommonNoTermination
   RTSanitizerCommonLibc
   RTInterception)
 set(SCUDO_OBJECT_LIBS ${SCUDO_MINIMAL_OBJECT_LIBS})
 set(SCUDO_DYNAMIC_LIBS ${SCUDO_MINIMAL_DYNAMIC_LIBS})