[CompilerRT] Remove ubsan static runtime on Apple

This patch removes the static ubsan runtime on Apple devices. The motivation
is to reduce the toolchain size.

rdar://102061519

Differential Revision: https://reviews.llvm.org/D141550

Author: usama54321

clang/include/clang/Basic/DiagnosticDriverKinds.td

@@ -215,6 +215,8 @@ def err_drv_malformed_sanitizer_coverage_allowlist : Error<
   "malformed sanitizer coverage allowlist: '%0'">;
 def err_drv_malformed_sanitizer_coverage_ignorelist : Error<
   "malformed sanitizer coverage ignorelist: '%0'">;
+def err_drv_unsupported_static_ubsan_darwin : Error<
+  "static UndefinedBehaviorSanitizer runtime is not supported on darwin">;
 def err_drv_duplicate_config : Error<
   "no more than one option '--config' is allowed">;
 def err_drv_cannot_open_config_file : Error<

clang/lib/Driver/ToolChains/Darwin.cpp

@@ -1425,15 +1425,22 @@ void DarwinClang::AddLinkRuntimeLibArgs(const ArgList &Args,
   }
 
   const SanitizerArgs &Sanitize = getSanitizerArgs(Args);
+
+  if (!Sanitize.needsSharedRt() && Sanitize.needsUbsanRt()) {
+    getDriver().Diag(diag::err_drv_unsupported_static_ubsan_darwin);
+    return;
+  }
+
   if (Sanitize.needsAsanRt())
     AddLinkSanitizerLibArgs(Args, CmdArgs, "asan");
   if (Sanitize.needsLsanRt())
     AddLinkSanitizerLibArgs(Args, CmdArgs, "lsan");
-  if (Sanitize.needsUbsanRt())
+  if (Sanitize.needsUbsanRt()) {
+    assert(Sanitize.needsSharedRt() && "Static sanitizer runtimes not supported");
     AddLinkSanitizerLibArgs(Args, CmdArgs,
                             Sanitize.requiresMinimalRuntime() ? "ubsan_minimal"
-                                                              : "ubsan",
-                            Sanitize.needsSharedRt());
+                                                              : "ubsan");
+  }
   if (Sanitize.needsTsanRt())
     AddLinkSanitizerLibArgs(Args, CmdArgs, "tsan");
   if (Sanitize.needsFuzzer() && !Args.hasArg(options::OPT_dynamiclib)) {

clang/test/Driver/sanitizer-ld.c

@@ -423,8 +423,7 @@
 // RUN:     --target=x86_64-apple-darwin -fuse-ld=ld -static-libsan \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-UBSAN-STATIC-DARWIN %s
-// CHECK-UBSAN-STATIC-DARWIN: "{{.*}}ld{{(.exe)?}}"
-// CHECK-UBSAN-STATIC-DARWIN: "{{.*}}libclang_rt.ubsan_osx.a"
+// CHECK-UBSAN-STATIC-DARWIN: {{.*}}error: static UndefinedBehaviorSanitizer runtime is not supported on darwin
 
 // RUN: %clang -fsanitize=address,undefined -### %s 2>&1 \
 // RUN:     --target=i386-unknown-linux -fuse-ld=ld \

compiler-rt/lib/ubsan/CMakeLists.txt

@@ -114,19 +114,21 @@ if(APPLE)
       LINK_FLAGS ${WEAK_SYMBOL_LINK_FLAGS}
       PARENT_TARGET ubsan)
 
-    add_compiler_rt_runtime(clang_rt.ubsan
-      STATIC
-      OS ${UBSAN_SUPPORTED_OS}
-      ARCHS ${UBSAN_SUPPORTED_ARCH}
-      OBJECT_LIBS RTUbsan
-                  RTUbsan_standalone
-                  RTSanitizerCommonNoHooks
-                  RTSanitizerCommonLibcNoHooks
-                  RTSanitizerCommonCoverage
-                  RTSanitizerCommonSymbolizerNoHooks
-                  RTInterception
-      LINK_FLAGS ${WEAK_SYMBOL_LINK_FLAGS}
-      PARENT_TARGET ubsan)
+    if (NOT APPLE)
+      add_compiler_rt_runtime(clang_rt.ubsan
+        STATIC
+        OS ${UBSAN_SUPPORTED_OS}
+        ARCHS ${UBSAN_SUPPORTED_ARCH}
+        OBJECT_LIBS RTUbsan
+                    RTUbsan_standalone
+                    RTSanitizerCommonNoHooks
+                    RTSanitizerCommonLibcNoHooks
+                    RTSanitizerCommonCoverage
+                    RTSanitizerCommonSymbolizerNoHooks
+                    RTInterception
+        LINK_FLAGS ${WEAK_SYMBOL_LINK_FLAGS}
+        PARENT_TARGET ubsan)
+    endif()
   endif()
 
 else()

compiler-rt/test/ubsan/CMakeLists.txt

@@ -101,7 +101,6 @@ if(APPLE)
     set(UBSAN_TEST_TARGET_ARCH ${arch})
     get_test_cc_for_arch(${arch} UBSAN_TEST_TARGET_CC UBSAN_TEST_TARGET_CFLAGS)
     set(UBSAN_TEST_TARGET_CFLAGS "${UBSAN_TEST_TARGET_CFLAGS} -lc++abi")
-    add_ubsan_testsuites("StandaloneStatic" ubsan ${arch})
   endforeach()
 
   # Device and simulator test suites.