[scudo] Add a minimal runtime for -fsanitize-minimal-runtime compatibility

Summary:
This patch follows D48373.

The point is to be able to use Scudo with `-fsanitize-minimal-runtime`. For that
we need a runtime that doesn't embed the UBSan one. This results in binaries
that can be compiled with `-fsanitize=scudo,integer -fsanitize-minimal-runtime`.

Reviewers: eugenis

Reviewed By: eugenis

Subscribers: mgorny, delcypher, llvm-commits, #sanitizers

Differential Revision: https://reviews.llvm.org/D48377

llvm-svn: 335296

1 files changed, 34 insertions, 8 deletions

diff --git a/compiler-rt/lib/scudo/CMakeLists.txt b/compiler-rt/lib/scudo/CMakeLists.txt
index 32472af5c8a..ce0e5cce1ac 100644
--- a/compiler-rt/lib/scudo/CMakeLists.txt
+++ b/compiler-rt/lib/scudo/CMakeLists.txt
@@ -7,30 +7,33 @@ set(SCUDO_CFLAGS ${SANITIZER_COMMON_CFLAGS})
 list(APPEND SCUDO_CFLAGS -fbuiltin)
 append_rtti_flag(OFF SCUDO_CFLAGS)
 
-set(SCUDO_DYNAMIC_LIBS ${SANITIZER_COMMON_LINK_LIBS})
-append_list_if(COMPILER_RT_HAS_LIBDL dl SCUDO_DYNAMIC_LIBS)
-append_list_if(COMPILER_RT_HAS_LIBRT rt SCUDO_DYNAMIC_LIBS)
-append_list_if(COMPILER_RT_HAS_LIBPTHREAD pthread SCUDO_DYNAMIC_LIBS)
-append_list_if(COMPILER_RT_HAS_LIBLOG log SCUDO_DYNAMIC_LIBS)
+set(SCUDO_MINIMAL_DYNAMIC_LIBS ${SANITIZER_COMMON_LINK_LIBS})
+append_list_if(COMPILER_RT_HAS_LIBDL dl SCUDO_MINIMAL_DYNAMIC_LIBS)
+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)
 
-set(SCUDO_OBJECT_LIBS
+# 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})
 
 if (FUCHSIA)
   list(APPEND SCUDO_CFLAGS -nostdinc++)
   list(APPEND SCUDO_DYNAMIC_LINK_FLAGS -nostdlib++)
 else()
+  list(APPEND SCUDO_DYNAMIC_LIBS ${SANITIZER_CXX_ABI_LIBRARY})
   list(APPEND SCUDO_OBJECT_LIBS
     RTSanitizerCommonCoverage
     RTSanitizerCommonSymbolizer
     RTUbsan)
-  list(APPEND SCUDO_DYNAMIC_LIBS ${SANITIZER_CXX_ABI_LIBRARY})
 endif()
 
 set(SCUDO_SOURCES
@@ -59,6 +62,20 @@ if (COMPILER_RT_HAS_MCRC_FLAG)
 endif()
 
 if(COMPILER_RT_HAS_SCUDO)
+  add_compiler_rt_runtime(clang_rt.scudo_minimal
+    STATIC
+    ARCHS ${SCUDO_SUPPORTED_ARCH}
+    SOURCES ${SCUDO_SOURCES}
+    OBJECT_LIBS ${SCUDO_MINIMAL_OBJECT_LIBS}
+    CFLAGS ${SCUDO_CFLAGS}
+    PARENT_TARGET scudo)
+  add_compiler_rt_runtime(clang_rt.scudo_cxx_minimal
+    STATIC
+    ARCHS ${SCUDO_SUPPORTED_ARCH}
+    SOURCES ${SCUDO_CXX_SOURCES}
+    CFLAGS ${SCUDO_CFLAGS}
+    PARENT_TARGET scudo)
+
   add_compiler_rt_runtime(clang_rt.scudo
     STATIC
     ARCHS ${SCUDO_SUPPORTED_ARCH}
@@ -66,7 +83,6 @@ if(COMPILER_RT_HAS_SCUDO)
     OBJECT_LIBS ${SCUDO_OBJECT_LIBS}
     CFLAGS ${SCUDO_CFLAGS}
     PARENT_TARGET scudo)
-
   add_compiler_rt_runtime(clang_rt.scudo_cxx
     STATIC
     ARCHS ${SCUDO_SUPPORTED_ARCH}
@@ -75,6 +91,16 @@ if(COMPILER_RT_HAS_SCUDO)
     CFLAGS ${SCUDO_CFLAGS}
     PARENT_TARGET scudo)
 
+  add_compiler_rt_runtime(clang_rt.scudo_minimal
+    SHARED
+    ARCHS ${SCUDO_SUPPORTED_ARCH}
+    SOURCES ${SCUDO_SOURCES} ${SCUDO_CXX_SOURCES}
+    OBJECT_LIBS ${SCUDO_MINIMAL_OBJECT_LIBS}
+    CFLAGS ${SCUDO_CFLAGS}
+    LINK_FLAGS ${SCUDO_DYNAMIC_LINK_FLAGS}
+    LINK_LIBS ${SCUDO_MINIMAL_DYNAMIC_LIBS}
+    PARENT_TARGET scudo)
+
   add_compiler_rt_runtime(clang_rt.scudo
     SHARED
     ARCHS ${SCUDO_SUPPORTED_ARCH}