1 /*
   2  * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 typedef void (*initializer)(void);
  26 
  27 class AbstractCompiler : public CHeapObj {
  28  private:
  29   bool _is_initialized; // Mark whether compiler object is initialized
  30 
  31  protected:
  32   // Used for tracking global state of compiler runtime initialization
  33   enum { uninitialized, initializing, initialized };
  34 
  35   // This method will call the initialization method "f" once (per compiler class/subclass)
  36   // and do so without holding any locks
  37   void initialize_runtimes(initializer f, volatile int* state);
  38 
  39  public:
  40   AbstractCompiler() : _is_initialized(false)    {}
  41 
  42   // Name of this compiler
  43   virtual const char* name() = 0;
  44 
  45   // Missing feature tests
  46   virtual bool supports_native()                 { return true; }
  47   virtual bool supports_osr   ()                 { return true; }
  48 #if defined(TIERED) || ( !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK))
  49   virtual bool is_c1   ()                        { return false; }
  50   virtual bool is_c2   ()                        { return false; }
  51   virtual bool is_shark()                        { return false; }
  52 #else
  53 #ifdef COMPILER1
  54   bool is_c1   ()                                { return true; }
  55   bool is_c2   ()                                { return false; }
  56   bool is_shark()                                { return false; }
  57 #endif // COMPILER1
  58 #ifdef COMPILER2
  59   bool is_c1   ()                                { return false; }
  60   bool is_c2   ()                                { return true; }
  61   bool is_shark()                                { return false; }
  62 #endif // COMPILER2
  63 #ifdef SHARK
  64   bool is_c1   ()                                { return false; }
  65   bool is_c2   ()                                { return false; }
  66   bool is_shark()                                { return true; }
  67 #endif // SHARK  
  68 #endif // TIERED
  69 
  70   // Customization
  71   virtual bool needs_stubs            ()         = 0;
  72 
  73   void mark_initialized()                        { _is_initialized = true; }
  74   bool is_initialized()                          { return _is_initialized; }
  75 
  76   virtual void initialize()                      = 0;
  77 
  78   // Compilation entry point for methods
  79   virtual void compile_method(ciEnv* env,
  80                               ciMethod* target,
  81                               int entry_bci) {
  82     ShouldNotReachHere();
  83   }
  84 
  85 
  86   // Print compilation timers and statistics
  87   virtual void print_timers() {
  88     ShouldNotReachHere();
  89   }
  90 };