1 files changed, 106 insertions, 0 deletions
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/Environment.h b/include/clang/StaticAnalyzer/Core/PathSensitive/Environment.h
new file mode 100644
index 0000000..732a40cb
--- /dev/null
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/Environment.h
@@ -0,0 +1,106 @@
+//== Environment.h - Map from Stmt* to Locations/Values ---------*- C++ -*--==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file defined the Environment and EnvironmentManager classes.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_GR_ENVIRONMENT_H
+#define LLVM_CLANG_GR_ENVIRONMENT_H
+
+#include "clang/StaticAnalyzer/Core/PathSensitive/Store.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
+#include "llvm/ADT/ImmutableMap.h"
+
+namespace clang {
+
+class LiveVariables;
+
+namespace ento {
+
+class EnvironmentManager;
+class SValBuilder;
+
+/// Environment - An immutable map from Stmts to their current
+///  symbolic values (SVals).
+///
+class Environment {
+private:
+  friend class EnvironmentManager;
+
+  // Type definitions.
+  typedef llvm::ImmutableMap<const Stmt*,SVal> BindingsTy;
+
+  // Data.
+  BindingsTy ExprBindings;
+
+  Environment(BindingsTy eb)
+    : ExprBindings(eb) {}
+
+  SVal lookupExpr(const Stmt* E) const;
+
+public:
+  typedef BindingsTy::iterator iterator;
+  iterator begin() const { return ExprBindings.begin(); }
+  iterator end() const { return ExprBindings.end(); }
+
+
+  /// GetSVal - Fetches the current binding of the expression in the
+  ///  Environment.
+  SVal getSVal(const Stmt* Ex, SValBuilder& svalBuilder) const;
+
+  /// Profile - Profile the contents of an Environment object for use
+  ///  in a FoldingSet.
+  static void Profile(llvm::FoldingSetNodeID& ID, const Environment* env) {
+    env->ExprBindings.Profile(ID);
+  }
+
+  /// Profile - Used to profile the contents of this object for inclusion
+  ///  in a FoldingSet.
+  void Profile(llvm::FoldingSetNodeID& ID) const {
+    Profile(ID, this);
+  }
+
+  bool operator==(const Environment& RHS) const {
+    return ExprBindings == RHS.ExprBindings;
+  }
+};
+
+class EnvironmentManager {
+private:
+  typedef Environment::BindingsTy::Factory FactoryTy;
+  FactoryTy F;
+
+public:
+  EnvironmentManager(llvm::BumpPtrAllocator& Allocator) : F(Allocator) {}
+  ~EnvironmentManager() {}
+
+  Environment getInitialEnvironment() {
+    return Environment(F.getEmptyMap());
+  }
+
+  /// Bind the value 'V' to the statement 'S'.
+  Environment bindExpr(Environment Env, const Stmt *S, SVal V,
+                       bool Invalidate);
+  
+  /// Bind the location 'location' and value 'V' to the statement 'S'.  This
+  /// is used when simulating loads/stores.
+  Environment bindExprAndLocation(Environment Env, const Stmt *S, SVal location,
+                                  SVal V);
+
+  Environment removeDeadBindings(Environment Env,
+                                 SymbolReaper &SymReaper, const GRState *ST,
+                          llvm::SmallVectorImpl<const MemRegion*>& RegionRoots);
+};
+
+} // end GR namespace
+
+} // end clang namespace
+
+#endif