1 /* 2 * Copyright (c) 1999, 2007, 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 class SharkContext; 27 28 class SharkCompiler : public AbstractCompiler { 29 public: 30 // Creation 31 SharkCompiler(); 32 33 // Name of this compiler 34 const char *name() { return "shark"; } 35 36 // Missing feature tests 37 bool supports_native() { return true; } 38 bool supports_osr() { return true; } 39 40 // Customization 41 bool needs_adapters() { return false; } 42 bool needs_stubs() { return false; } 43 44 // Initialization 45 void initialize(); 46 47 // Compile a normal (bytecode) method and install it in the VM 48 void compile_method(ciEnv* env, ciMethod* target, int entry_bci); 49 50 // Generate a wrapper for a native (JNI) method 51 nmethod* generate_native_wrapper(MacroAssembler* masm, 52 methodHandle target, 53 BasicType* arg_types, 54 BasicType return_type); 55 56 // Free compiled methods (and native wrappers) 57 void free_compiled_method(address code); 58 59 // Each thread generating IR needs its own context. The normal 60 // context is used for bytecode methods, and is protected from 61 // multiple simultaneous accesses by being restricted to the 62 // compiler thread. The native context is used for JNI methods, 63 // and is protected from multiple simultaneous accesses by the 64 // adapter handler library lock. 65 private: 66 SharkContext* _normal_context; 67 SharkContext* _native_context; 68 69 public: 70 SharkContext* context() const { 71 if (JavaThread::current()->is_Compiler_thread()) { 72 return _normal_context; 73 } 74 else { 75 assert(AdapterHandlerLibrary_lock->owned_by_self(), "should be"); 76 return _native_context; 77 } 78 } 79 80 // The LLVM execution engine is the JIT we use to generate native 81 // code. It is thread safe, but we need to protect it with a lock 82 // of our own because otherwise LLVM's lock and HotSpot's locks 83 // interleave and deadlock. The SharkMemoryManager is not thread 84 // safe, and is protected by the same lock as the execution engine. 85 private: 86 Monitor* _execution_engine_lock; 87 SharkMemoryManager* _memory_manager; 88 llvm::ExecutionEngine* _execution_engine; 89 90 private: 91 Monitor* execution_engine_lock() const { 92 return _execution_engine_lock; 93 } 94 SharkMemoryManager* memory_manager() const { 95 assert(execution_engine_lock()->owned_by_self(), "should be"); 96 return _memory_manager; 97 } 98 llvm::ExecutionEngine* execution_engine() const { 99 assert(execution_engine_lock()->owned_by_self(), "should be"); 100 return _execution_engine; 101 } 102 103 // Global access 104 public: 105 static SharkCompiler* compiler() { 106 AbstractCompiler *compiler = 107 CompileBroker::compiler(CompLevel_fast_compile); 108 assert(compiler->is_shark() && compiler->is_initialized(), "should be"); 109 return (SharkCompiler *) compiler; 110 } 111 112 // Helpers 113 private: 114 static const char* methodname(const char* klass, const char* method); 115 void generate_native_code(SharkEntry* entry, 116 llvm::Function* function, 117 const char* name); 118 void free_queued_methods(); 119 };