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1 /*
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2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2008, 2009, 2010, 2011 Red Hat, Inc.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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26 #ifndef SHARE_VM_SHARK_SHARKCOMPILER_HPP
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27 #define SHARE_VM_SHARK_SHARKCOMPILER_HPP
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28
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29 #include "ci/ciEnv.hpp"
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30 #include "ci/ciMethod.hpp"
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31 #include "compiler/abstractCompiler.hpp"
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32 #include "compiler/compileBroker.hpp"
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33 #include "shark/llvmHeaders.hpp"
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34 #include "shark/sharkMemoryManager.hpp"
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35
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36 class SharkContext;
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37
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38 class SharkCompiler : public AbstractCompiler {
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39 public:
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40 // Creation
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41 SharkCompiler();
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42
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43 // Name of this compiler
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44 const char *name() { return "shark"; }
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45
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46 // Missing feature tests
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47 bool supports_native() { return true; }
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48 bool supports_osr() { return true; }
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49
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50 // Customization
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51 bool needs_adapters() { return false; }
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52 bool needs_stubs() { return false; }
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53
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54 // Initialization
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55 void initialize();
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56
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57 // Compile a normal (bytecode) method and install it in the VM
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58 void compile_method(ciEnv* env, ciMethod* target, int entry_bci);
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59
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60 // Generate a wrapper for a native (JNI) method
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61 nmethod* generate_native_wrapper(MacroAssembler* masm,
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62 methodHandle target,
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63 int compile_id,
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64 BasicType* arg_types,
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65 BasicType return_type);
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66
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67 // Free compiled methods (and native wrappers)
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68 void free_compiled_method(address code);
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69
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70 // Each thread generating IR needs its own context. The normal
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71 // context is used for bytecode methods, and is protected from
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72 // multiple simultaneous accesses by being restricted to the
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73 // compiler thread. The native context is used for JNI methods,
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74 // and is protected from multiple simultaneous accesses by the
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75 // adapter handler library lock.
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76 private:
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77 SharkContext* _normal_context;
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78 SharkContext* _native_context;
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79
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80 public:
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81 SharkContext* context() const {
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82 if (JavaThread::current()->is_Compiler_thread()) {
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83 return _normal_context;
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84 }
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85 else {
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86 assert(AdapterHandlerLibrary_lock->owned_by_self(), "should be");
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87 return _native_context;
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88 }
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89 }
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90
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91 // The LLVM execution engine is the JIT we use to generate native
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92 // code. It is thread safe, but we need to protect it with a lock
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93 // of our own because otherwise LLVM's lock and HotSpot's locks
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94 // interleave and deadlock. The SharkMemoryManager is not thread
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95 // safe, and is protected by the same lock as the execution engine.
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96 private:
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97 Monitor* _execution_engine_lock;
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98 SharkMemoryManager* _memory_manager;
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99 llvm::ExecutionEngine* _execution_engine;
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100
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101 private:
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102 Monitor* execution_engine_lock() const {
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103 return _execution_engine_lock;
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104 }
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105 SharkMemoryManager* memory_manager() const {
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106 assert(execution_engine_lock()->owned_by_self(), "should be");
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107 return _memory_manager;
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108 }
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109 llvm::ExecutionEngine* execution_engine() const {
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110 assert(execution_engine_lock()->owned_by_self(), "should be");
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111 return _execution_engine;
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112 }
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113
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114 // Global access
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115 public:
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116 static SharkCompiler* compiler() {
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117 AbstractCompiler *compiler =
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118 CompileBroker::compiler(CompLevel_full_optimization);
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119 assert(compiler->is_shark() && compiler->is_initialized(), "should be");
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120 return (SharkCompiler *) compiler;
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121 }
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122
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123 // Helpers
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124 private:
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125 static const char* methodname(const char* klass, const char* method);
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126 void generate_native_code(SharkEntry* entry,
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127 llvm::Function* function,
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128 const char* name);
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129 void free_queued_methods();
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130 };
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131
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132 #endif // SHARE_VM_SHARK_SHARKCOMPILER_HPP
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