Refactor undefined argument checking into a Checker.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@80417 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/GRExprEngineInternalChecks.cpp b/lib/Analysis/GRExprEngineInternalChecks.cpp
index 1b2fd1c..35ca0c5 100644
--- a/lib/Analysis/GRExprEngineInternalChecks.cpp
+++ b/lib/Analysis/GRExprEngineInternalChecks.cpp
@@ -245,7 +245,12 @@
ExplodedNode *n, const Stmt *arg)
: BuiltinBugReport(bt, shortDesc, desc, n), Arg(arg) {}
- const Stmt *getArg() const { return Arg; }
+ const Stmt *getArg() const { return Arg; }
+
+ void registerInitialVisitors(BugReporterContext& BRC,
+ const ExplodedNode* N) {
+ registerTrackNullOrUndefValue(BRC, getArg(), N);
+ }
};
class VISIBILITY_HIDDEN BadArg : public BuiltinBug {
@@ -629,6 +634,44 @@
};
} // end anonymous namespace
+// Undefined arguments checking.
+namespace {
+class VISIBILITY_HIDDEN CheckUndefinedArg
+ : public CheckerVisitor<CheckUndefinedArg> {
+
+ BugType *BT;
+
+public:
+ CheckUndefinedArg() : BT(0) {}
+ ~CheckUndefinedArg() {}
+
+ const void *getTag() {
+ static int x = 0;
+ return &x;
+ }
+
+ void PreVisitCallExpr(CheckerContext &C, const CallExpr *CE);
+};
+
+void CheckUndefinedArg::PreVisitCallExpr(CheckerContext &C, const CallExpr *CE){
+ for (CallExpr::const_arg_iterator I = CE->arg_begin(), E = CE->arg_end();
+ I != E; ++I) {
+ if (C.getState()->getSVal(*I).isUndef()) {
+ if (ExplodedNode *ErrorNode = C.generateNode(CE, C.getState(), true)) {
+ if (!BT)
+ BT = new BugType("Uninitialized argument.", "Logic Errors.");
+ // Generate a report for this bug.
+ ArgReport *Report = new ArgReport(*BT,
+ "Pass-by-value argument in function call is undefined.",
+ ErrorNode, *I);
+ Report->addRange((*I)->getSourceRange());
+ C.EmitReport(Report);
+ }
+ }
+ }
+}
+
+}
//===----------------------------------------------------------------------===//
// Check registration.
//===----------------------------------------------------------------------===//
@@ -647,7 +690,6 @@
BR.Register(new BadCall(this));
BR.Register(new RetStack(this));
BR.Register(new RetUndef(this));
- BR.Register(new BadArg(this));
BR.Register(new BadMsgExprArg(this));
BR.Register(new BadReceiver(this));
BR.Register(new OutOfBoundMemoryAccess(this));
@@ -661,4 +703,5 @@
// automatically. Note that the check itself is owned by the GRExprEngine
// object.
registerCheck(new CheckAttrNonNull());
+ registerCheck(new CheckUndefinedArg());
}