add support for goto checking and @synchronized blocks,
rdar://6810106
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69667 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/JumpDiagnostics.cpp b/lib/Sema/JumpDiagnostics.cpp
index 82db0bb..b812f06 100644
--- a/lib/Sema/JumpDiagnostics.cpp
+++ b/lib/Sema/JumpDiagnostics.cpp
@@ -168,6 +168,22 @@
continue;
}
+ // Disallow jumps into the protected statement of an @synchronized, but
+ // allow jumps into the object expression it protects.
+ if (ObjCAtSynchronizedStmt *AS = dyn_cast<ObjCAtSynchronizedStmt>(SubStmt)){
+ // Recursively walk the AST for the @synchronized object expr, it is
+ // evaluated in the normal scope.
+ BuildScopeInformation(AS->getSynchExpr(), ParentScope);
+
+ // Recursively walk the AST for the @synchronized part, protected by a new
+ // scope.
+ Scopes.push_back(GotoScope(ParentScope,
+ diag::note_protected_by_objc_synchronized,
+ AS->getAtSynchronizedLoc()));
+ BuildScopeInformation(AS->getSynchBody(), Scopes.size()-1);
+ continue;
+ }
+
// Recursively walk the AST.
BuildScopeInformation(SubStmt, ParentScope);
}