Fix NoReturnFunctionChecker to properly look at a function's type

when determining if it returns.  Fixes <rdar://problem/7796563>.

llvm-svn: 99663

1 files changed, 41 insertions, 41 deletions

diff --git a/clang/lib/Checker/NoReturnFunctionChecker.cpp b/clang/lib/Checker/NoReturnFunctionChecker.cpp
index 1455d87665d..80fea99c36c 100644
--- a/clang/lib/Checker/NoReturnFunctionChecker.cpp
+++ b/clang/lib/Checker/NoReturnFunctionChecker.cpp
@@ -13,17 +13,17 @@
 //===----------------------------------------------------------------------===//
 
 #include "GRExprEngineInternalChecks.h"
-#include "clang/Checker/PathSensitive/Checker.h"
+#include "clang/Checker/PathSensitive/CheckerVisitor.h"
 #include "llvm/ADT/StringSwitch.h"
 
 using namespace clang;
 
 namespace {
 
-class NoReturnFunctionChecker : public Checker {
+class NoReturnFunctionChecker : public CheckerVisitor<NoReturnFunctionChecker> {
 public:
   static void *getTag() { static int tag = 0; return &tag; }
-  virtual bool EvalCallExpr(CheckerContext &C, const CallExpr *CE);
+  void PostVisitCallExpr(CheckerContext &C, const CallExpr *CE);
 };
 
 }
@@ -32,48 +32,48 @@ void clang::RegisterNoReturnFunctionChecker(GRExprEngine &Eng) {
   Eng.registerCheck(new NoReturnFunctionChecker());
 }
 
-bool NoReturnFunctionChecker::EvalCallExpr(CheckerContext &C, 
-                                           const CallExpr *CE) {
+void NoReturnFunctionChecker::PostVisitCallExpr(CheckerContext &C,
+                                                const CallExpr *CE) {
   const GRState *state = C.getState();
   const Expr *Callee = CE->getCallee();
-  SVal L = state->getSVal(Callee);
-  const FunctionDecl *FD = L.getAsFunctionDecl();
-  if (!FD)
-    return false;
 
-  bool BuildSinks = false;
+  bool BuildSinks = Callee->getType().getNoReturnAttr();
 
-  if (FD->getAttr<NoReturnAttr>() || FD->getAttr<AnalyzerNoReturnAttr>())
-    BuildSinks = true;
-  else if (const IdentifierInfo *II = FD->getIdentifier()) {
-    // HACK: Some functions are not marked noreturn, and don't return.
-    //  Here are a few hardwired ones.  If this takes too long, we can
-    //  potentially cache these results.
-    BuildSinks 
-      = llvm::StringSwitch<bool>(llvm::StringRef(II->getName()))
-          .Case("exit", true)
-          .Case("panic", true)
-          .Case("error", true)
-          .Case("Assert", true)
-          // FIXME: This is just a wrapper around throwing an exception.
-          //  Eventually inter-procedural analysis should handle this easily.
-          .Case("ziperr", true)
-          .Case("assfail", true)
-          .Case("db_error", true)
-          .Case("__assert", true)
-          .Case("__assert_rtn", true)
-          .Case("__assert_fail", true)
-          .Case("dtrace_assfail", true)
-          .Case("yy_fatal_error", true)
-          .Case("_XCAssertionFailureHandler", true)
-          .Case("_DTAssertionFailureHandler", true)
-          .Case("_TSAssertionFailureHandler", true)
-          .Default(false);
+  if (!BuildSinks) {
+    SVal L = state->getSVal(Callee);
+    const FunctionDecl *FD = L.getAsFunctionDecl();
+    if (!FD)
+      return;
+
+    if (FD->getAttr<AnalyzerNoReturnAttr>())
+      BuildSinks = true;
+    else if (const IdentifierInfo *II = FD->getIdentifier()) {
+      // HACK: Some functions are not marked noreturn, and don't return.
+      //  Here are a few hardwired ones.  If this takes too long, we can
+      //  potentially cache these results.
+      BuildSinks
+        = llvm::StringSwitch<bool>(llvm::StringRef(II->getName()))
+            .Case("exit", true)
+            .Case("panic", true)
+            .Case("error", true)
+            .Case("Assert", true)
+            // FIXME: This is just a wrapper around throwing an exception.
+            //  Eventually inter-procedural analysis should handle this easily.
+            .Case("ziperr", true)
+            .Case("assfail", true)
+            .Case("db_error", true)
+            .Case("__assert", true)
+            .Case("__assert_rtn", true)
+            .Case("__assert_fail", true)
+            .Case("dtrace_assfail", true)
+            .Case("yy_fatal_error", true)
+            .Case("_XCAssertionFailureHandler", true)
+            .Case("_DTAssertionFailureHandler", true)
+            .Case("_TSAssertionFailureHandler", true)
+            .Default(false);
+    }
   }
-  
-  if (!BuildSinks)
-    return false;
 
-  C.GenerateSink(CE);
-  return true;
+  if (BuildSinks)
+    C.GenerateSink(CE);
 }