--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/code/pcDesc.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_CODE_PCDESC_HPP
+#define SHARE_VM_CODE_PCDESC_HPP
+
+#include "memory/allocation.hpp"
+
+// PcDescs map a physical PC (given as offset from start of nmethod) to
+// the corresponding source scope and byte code index.
+
+class CompiledMethod;
+
+class PcDesc VALUE_OBJ_CLASS_SPEC {
+  friend class VMStructs;
+ private:
+  int _pc_offset;           // offset from start of nmethod
+  int _scope_decode_offset; // offset for scope in nmethod
+  int _obj_decode_offset;
+
+  enum {
+    PCDESC_reexecute               = 1 << 0,
+    PCDESC_is_method_handle_invoke = 1 << 1,
+    PCDESC_return_oop              = 1 << 2,
+    PCDESC_rethrow_exception       = 1 << 3
+  };
+
+  int _flags;
+
+  void set_flag(int mask, bool z) {
+    _flags = z ? (_flags | mask) : (_flags & ~mask);
+  }
+
+ public:
+  int pc_offset() const           { return _pc_offset;   }
+  int scope_decode_offset() const { return _scope_decode_offset; }
+  int obj_decode_offset() const   { return _obj_decode_offset; }
+
+  void set_pc_offset(int x)           { _pc_offset           = x; }
+  void set_scope_decode_offset(int x) { _scope_decode_offset = x; }
+  void set_obj_decode_offset(int x)   { _obj_decode_offset   = x; }
+
+  // Constructor (only used for static in nmethod.cpp)
+  // Also used by ScopeDesc::sender()]
+  PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset);
+
+  enum {
+    // upper and lower exclusive limits real offsets:
+    lower_offset_limit = -1,
+    upper_offset_limit = (unsigned int)-1 >> 1
+  };
+
+  // Flags
+  bool     rethrow_exception()              const { return (_flags & PCDESC_rethrow_exception) != 0; }
+  void set_rethrow_exception(bool z)              { set_flag(PCDESC_rethrow_exception, z); }
+  bool     should_reexecute()              const { return (_flags & PCDESC_reexecute) != 0; }
+  void set_should_reexecute(bool z)              { set_flag(PCDESC_reexecute, z); }
+
+  // Does pd refer to the same information as pd?
+  bool is_same_info(const PcDesc* pd) {
+    return _scope_decode_offset == pd->_scope_decode_offset &&
+      _obj_decode_offset == pd->_obj_decode_offset &&
+      _flags == pd->_flags;
+  }
+
+  bool     is_method_handle_invoke()       const { return (_flags & PCDESC_is_method_handle_invoke) != 0;     }
+  void set_is_method_handle_invoke(bool z)       { set_flag(PCDESC_is_method_handle_invoke, z); }
+
+  bool     return_oop()                    const { return (_flags & PCDESC_return_oop) != 0;     }
+  void set_return_oop(bool z)                    { set_flag(PCDESC_return_oop, z); }
+
+  // Returns the real pc
+  address real_pc(const CompiledMethod* code) const;
+
+  void print(CompiledMethod* code);
+  bool verify(CompiledMethod* code);
+};
+
+#endif // SHARE_VM_CODE_PCDESC_HPP