1 files changed, 107 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/StaticAnalyzer/Checkers/TraversalChecker.cpp b/contrib/llvm/tools/clang/lib/StaticAnalyzer/Checkers/TraversalChecker.cpp
new file mode 100644
index 000000000000..57c9ed4ce289
--- /dev/null
+++ b/contrib/llvm/tools/clang/lib/StaticAnalyzer/Checkers/TraversalChecker.cpp
@@ -0,0 +1,107 @@
+//== TraversalChecker.cpp -------------------------------------- -*- C++ -*--=//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// These checkers print various aspects of the ExprEngine's traversal of the CFG
+// as it builds the ExplodedGraph.
+//
+//===----------------------------------------------------------------------===//
+#include "ClangSACheckers.h"
+#include "clang/AST/ParentMap.h"
+#include "clang/AST/StmtObjC.h"
+#include "clang/StaticAnalyzer/Core/Checker.h"
+#include "clang/StaticAnalyzer/Core/CheckerManager.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace clang;
+using namespace ento;
+
+namespace {
+class TraversalDumper : public Checker< check::BranchCondition,
+                                        check::EndFunction > {
+public:
+  void checkBranchCondition(const Stmt *Condition, CheckerContext &C) const;
+  void checkEndFunction(CheckerContext &C) const;
+};
+}
+
+void TraversalDumper::checkBranchCondition(const Stmt *Condition,
+                                           CheckerContext &C) const {
+  // Special-case Objective-C's for-in loop, which uses the entire loop as its
+  // condition. We just print the collection expression.
+  const Stmt *Parent = dyn_cast<ObjCForCollectionStmt>(Condition);
+  if (!Parent) {
+    const ParentMap &Parents = C.getLocationContext()->getParentMap();
+    Parent = Parents.getParent(Condition);
+  }
+
+  // It is mildly evil to print directly to llvm::outs() rather than emitting
+  // warnings, but this ensures things do not get filtered out by the rest of
+  // the static analyzer machinery.
+  SourceLocation Loc = Parent->getLocStart();
+  llvm::outs() << C.getSourceManager().getSpellingLineNumber(Loc) << " "
+               << Parent->getStmtClassName() << "\n";
+}
+
+void TraversalDumper::checkEndFunction(CheckerContext &C) const {
+  llvm::outs() << "--END FUNCTION--\n";
+}
+
+void ento::registerTraversalDumper(CheckerManager &mgr) {
+  mgr.registerChecker<TraversalDumper>();
+}
+
+//------------------------------------------------------------------------------
+
+namespace {
+class CallDumper : public Checker< check::PreCall,
+                                   check::PostCall > {
+public:
+  void checkPreCall(const CallEvent &Call, CheckerContext &C) const;
+  void checkPostCall(const CallEvent &Call, CheckerContext &C) const;
+};
+}
+
+void CallDumper::checkPreCall(const CallEvent &Call, CheckerContext &C) const {
+  unsigned Indentation = 0;
+  for (const LocationContext *LC = C.getLocationContext()->getParent();
+       LC != 0; LC = LC->getParent())
+    ++Indentation;
+
+  // It is mildly evil to print directly to llvm::outs() rather than emitting
+  // warnings, but this ensures things do not get filtered out by the rest of
+  // the static analyzer machinery.
+  llvm::outs().indent(Indentation);
+  Call.dump(llvm::outs());
+}
+
+void CallDumper::checkPostCall(const CallEvent &Call, CheckerContext &C) const {
+  const Expr *CallE = Call.getOriginExpr();
+  if (!CallE)
+    return;
+
+  unsigned Indentation = 0;
+  for (const LocationContext *LC = C.getLocationContext()->getParent();
+       LC != 0; LC = LC->getParent())
+    ++Indentation;
+
+  // It is mildly evil to print directly to llvm::outs() rather than emitting
+  // warnings, but this ensures things do not get filtered out by the rest of
+  // the static analyzer machinery.
+  llvm::outs().indent(Indentation);
+  if (Call.getResultType()->isVoidType())
+    llvm::outs() << "Returning void\n";
+  else
+    llvm::outs() << "Returning " << C.getSVal(CallE) << "\n";
+}
+
+void ento::registerCallDumper(CheckerManager &mgr) {
+  mgr.registerChecker<CallDumper>();
+}