abstractCompiler.hpp revision 5776:de6a9e811145 
1/*
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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 *
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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 *
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24
25#ifndef SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP
26#define SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP
27
28#include "ci/compilerInterface.hpp"
29
30class 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, 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 is_failed     ()           { return _compiler_state == failed;}
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
103