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