hotspot/src/share/vm/compiler/abstractCompiler.hpp

/*
 * Copyright 1999-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 */

typedef void (*initializer)(void);

class AbstractCompiler : public CHeapObj {
 private:
  bool _is_initialized; // Mark whether compiler object is initialized

 protected:
  // Used for tracking global state of compiler runtime initialization
  enum { uninitialized, initializing, initialized };

  // This method will call the initialization method "f" once (per compiler class/subclass)
  // and do so without holding any locks
  void initialize_runtimes(initializer f, volatile int* state);

 public:
  AbstractCompiler() : _is_initialized(false)    {}

  // Name of this compiler
  virtual const char* name() = 0;

  // Missing feature tests
  virtual bool supports_native()                 { return true; }
  virtual bool supports_osr   ()                 { return true; }
#if defined(TIERED) || ( !defined(COMPILER1) && !defined(COMPILER2))
  virtual bool is_c1   ()                        { return false; }
  virtual bool is_c2   ()                        { return false; }
#else
#ifdef COMPILER1
  bool is_c1   ()                                { return true; }
  bool is_c2   ()                                { return false; }
#endif // COMPILER1
#ifdef COMPILER2
  bool is_c1   ()                                { return false; }
  bool is_c2   ()                                { return true; }
#endif // COMPILER2
#endif // TIERED

  // Customization
  virtual bool needs_stubs            ()         = 0;

  void mark_initialized()                        { _is_initialized = true; }
  bool is_initialized()                          { return _is_initialized; }

  virtual void initialize()                      = 0;

  // Compilation entry point for methods
  virtual void compile_method(ciEnv* env,
                              ciMethod* target,
                              int entry_bci) {
    ShouldNotReachHere();
  }


  // Print compilation timers and statistics
  virtual void print_timers() {
    ShouldNotReachHere();
  }
};