[GCChecker] fixes for running C++ analysis on macOS (#34095)

Author: vtjnash

src/Makefile

@@ -378,19 +378,21 @@ endif
 #   make CC=~+/../usr/tools/clang CXX=~+/../usr/tools/clang USECLANG=1 analyzegc
 #   make USECLANG=1 clang-sa-*
 CLANGSA_FLAGS :=
+CLANGSA_CXXFLAGS :=
 ifeq ($(OS), Darwin) # on new XCode, the files are hidden
 CLANGSA_FLAGS += -isysroot $(shell xcode-select -p)/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk
+CLANGSA_CXXFLAGS += -isystem $(shell xcode-select -p)/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1
 endif
 ifeq ($(USEGCC),1)
 # try to help clang find the c++ files for CC by guessing the value for --prefix
 # by dropping lib/gcc/<platform>/<version> from the install directory it reports
-CLANGSA_FLAGS += --gcc-toolchain="$(abspath $(shell LANG=C $(CC) -print-search-dirs | grep '^install: ' | sed -e "s/^install: //")/../../../..)"
+CLANGSA_CXXFLAGS += --gcc-toolchain="$(abspath $(shell LANG=C $(CC) -print-search-dirs | grep '^install: ' | sed -e "s/^install: //")/../../../..)"
 endif
 
 clang-sa-%: $(SRCDIR)/%.c $(build_shlibdir)/libGCCheckerPlugin.$(SHLIB_EXT) | analyzegc-deps-check
 	@$(call PRINT_ANALYZE, $(build_depsbindir)/clang --analyze -Xanalyzer -analyzer-werror -Xanalyzer -analyzer-output=text -Xclang -load -Xclang $(build_shlibdir)/libGCCheckerPlugin.$(SHLIB_EXT) $(CLANGSA_FLAGS) $(JCPPFLAGS) $(JCFLAGS) $(DEBUGFLAGS)  -Xclang -analyzer-checker=core$(COMMA)julia.GCChecker --analyzer-no-default-checks -fcolor-diagnostics -Werror -x c $<)
 clang-sa-%: $(SRCDIR)/%.cpp $(build_shlibdir)/libGCCheckerPlugin.$(SHLIB_EXT) | analyzegc-deps-check
-	@$(call PRINT_ANALYZE, $(build_depsbindir)/clang --analyze -Xanalyzer -analyzer-werror -Xanalyzer -analyzer-output=text -Xclang -load -Xclang $(build_shlibdir)/libGCCheckerPlugin.$(SHLIB_EXT) $(CLANGSA_FLAGS) $(LLVM_CXXFLAGS) $(JCPPFLAGS) $(JCXXFLAGS) $(DEBUGFLAGS) -Xclang -analyzer-checker=core$(COMMA)julia.GCChecker --analyzer-no-default-checks -fcolor-diagnostics -Werror -x c++ $<)
+	@$(call PRINT_ANALYZE, $(build_depsbindir)/clang --analyze -Xanalyzer -analyzer-werror -Xanalyzer -analyzer-output=text -Xclang -load -Xclang $(build_shlibdir)/libGCCheckerPlugin.$(SHLIB_EXT) $(CLANGSA_FLAGS) $(CLANGSA_CXXFLAGS) $(LLVM_CXXFLAGS) $(JCPPFLAGS) $(JCXXFLAGS) $(DEBUGFLAGS) -Xclang -analyzer-checker=core$(COMMA)julia.GCChecker --analyzer-no-default-checks -fcolor-diagnostics -Werror -x c++ $<)
 
 # Add C files as a target of `analyzegc`
 analyzegc: $(addprefix clang-sa-,$(RUNTIME_SRCS))

src/clangsa/GCChecker.cpp

@@ -770,6 +770,13 @@ bool GCChecker::isSafepoint(const CallEvent &Call) const
       if (const TypedefType *TDT = dyn_cast<TypedefType>(Callee->getType())) {
         isCalleeSafepoint = !declHasAnnotation(TDT->getDecl(), "julia_not_safepoint");
       }
+      else if (const CXXPseudoDestructorExpr *PDE = dyn_cast<CXXPseudoDestructorExpr>(Callee)) {
+        // A pseudo-destructor is an expression that looks like a member
+        // access to a destructor of a scalar type. A pseudo-destructor
+        // expression has no run-time semantics beyond evaluating the base
+        // expression (which would have it's own CallEvent, if applicable).
+        isCalleeSafepoint = false;
+      }
     } else if (FD) {
       if (FD->getBuiltinID() != 0 || FD->isTrivial())
         isCalleeSafepoint = false;
@@ -778,7 +785,7 @@ bool GCChecker::isSafepoint(const CallEvent &Call) const
                 FD->getName().startswith_lower("unw_") ||
                 FD->getName().startswith("_U")) &&
                FD->getName() != "uv_run")
-          isCalleeSafepoint = false;
+        isCalleeSafepoint = false;
       else
         isCalleeSafepoint = !isFDAnnotatedNotSafepoint(FD);
     }

src/debuginfo.cpp

@@ -588,7 +588,7 @@ typedef struct {
 typedef std::map<uint64_t, objfileentry_t, revcomp> obfiletype;
 static obfiletype objfilemap;
 
-static bool getObjUUID(llvm::object::MachOObjectFile *obj, uint8_t uuid[16])
+static bool getObjUUID(llvm::object::MachOObjectFile *obj, uint8_t uuid[16]) JL_NOTSAFEPOINT
 {
     for (auto Load : obj->load_commands())
     {
@@ -885,7 +885,7 @@ static objfileentry_t &find_object_file(uint64_t fbase, StringRef fname) JL_NOTS
         // the DebugSymbols framework is moved or removed, an alternative would
         // be to directly query Spotlight for the dSYM bundle.
 
-        typedef CFURLRef (*DBGCopyFullDSYMURLForUUIDfn)(CFUUIDRef, CFURLRef);
+        typedef CFURLRef (*DBGCopyFullDSYMURLForUUIDfn)(CFUUIDRef, CFURLRef) JL_NOTSAFEPOINT;
         DBGCopyFullDSYMURLForUUIDfn DBGCopyFullDSYMURLForUUID = NULL;
 
         // First, try to load the private DebugSymbols framework.