Implemented global redzones.

src/IceASanInstrumentation.h

+//===- subzero/src/IceASanInstrumentation.h - AddressSanitizer --*- C++ -*-===//
+//
+//                        The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief Declares the AddressSanitizer instrumentation class.
+///
+/// This class is responsible for inserting redzones around global and stack
+/// variables, inserting code responsible for poisoning those redzones, and
+/// performing any other instrumentation necessary to implement
+/// AddressSanitizer.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef SUBZERO_SRC_ICEASANINSTRUMENTATION_H
+#define SUBZERO_SRC_ICEASANINSTRUMENTATION_H
+
+#include "IceGlobalInits.h"
+#include "IceInstrumentation.h"
+
+namespace Ice {
+
+class ASanInstrumentation : public Instrumentation {
+  ASanInstrumentation() = delete;
+  ASanInstrumentation(const ASanInstrumentation &) = delete;
+  ASanInstrumentation &operator=(const ASanInstrumentation &) = delete;
+
+public:
+  ASanInstrumentation(GlobalContext *Ctx) : Instrumentation(Ctx) {}
+  void instrumentGlobals(VariableDeclarationList &Globals) override;
+
+private:
+  std::string nextRzName();
+  VariableDeclaration *createRz(VariableDeclarationList *List,
+                                VariableDeclaration *RzArray,
+                                SizeT &RzArraySize,
+                                VariableDeclaration *Global);
+  bool DidInsertRedZones = false;
+  uint32_t RzNum = 0;
+};
+} // end of namespace Ice
+
+#endif // SUBZERO_SRC_ICEASANINSTRUMENTATION_H