1 /*
   2  * Copyright (c) 1999, 2012, 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 #ifndef SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP
  26 #define SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP
  27 
  28 #include "ci/compilerInterface.hpp"
  29 
  30 class AbstractCompiler : public CHeapObj<mtCompiler> {
  31  private:
  32   volatile int _num_compiler_threads;
  33 
  34  protected:
  35   volatile int _compiler_state;
  36   // Used for tracking global state of compiler runtime initialization
  37   enum { uninitialized, initializing, initialized, failed, shutting_shown, shut_down };
  38 
  39   // This method returns true for the first compiler thread that reaches that methods.
  40   // This thread will initialize the compiler runtime.
  41   bool should_perform_init();
  42 
  43  public:
  44   AbstractCompiler() : _compiler_state(uninitialized), _num_compiler_threads(0) {}
  45 
  46   // This function determines the compiler thread that will perform the
  47   // shutdown of the corresponding compiler runtime.
  48   bool should_perform_shutdown();
  49 
  50   // Name of this compiler
  51   virtual const char* name() = 0;
  52 
  53   // Missing feature tests
  54   virtual bool supports_native()                 { return true; }
  55   virtual bool supports_osr   ()                 { return true; }
  56   virtual bool can_compile_method(methodHandle method)  { return true; }
  57 #if defined(TIERED) || ( !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK))
  58   virtual bool is_c1   ()                        { return false; }
  59   virtual bool is_c2   ()                        { return false; }
  60   virtual bool is_shark()                        { return false; }
  61 #else
  62 #ifdef COMPILER1
  63   bool is_c1   ()                                { return true; }
  64   bool is_c2   ()                                { return false; }
  65   bool is_shark()                                { return false; }
  66 #endif // COMPILER1
  67 #ifdef COMPILER2
  68   bool is_c1   ()                                { return false; }
  69   bool is_c2   ()                                { return true; }
  70   bool is_shark()                                { return false; }
  71 #endif // COMPILER2
  72 #ifdef SHARK
  73   bool is_c1   ()                                { return false; }
  74   bool is_c2   ()                                { return false; }
  75   bool is_shark()                                { return true; }
  76 #endif // SHARK
  77 #endif // TIERED
  78 
  79   // Customization
  80   virtual void initialize () = 0;
  81 
  82   void set_num_compiler_threads(int num) { _num_compiler_threads = num;  }
  83   int num_compiler_threads()             { return _num_compiler_threads; }
  84 
  85   // Get/set state of compiler objects
  86   bool is_initialized     ()       { return _compiler_state == initialized; }
  87   bool should_exit()               { return (_compiler_state == failed || _compiler_state == shutting_shown) ? true : false; }
  88   void set_state          (int state);
  89   void set_shut_down() { set_state(shut_down); }
  90   // Compilation entry point for methods
  91   virtual void compile_method(ciEnv* env, ciMethod* target, int entry_bci) {
  92     ShouldNotReachHere();
  93   }
  94 
  95 
  96   // Print compilation timers and statistics
  97   virtual void print_timers() {
  98     ShouldNotReachHere();
  99   }
 100 };
 101 
 102 #endif // SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP