1 /* 2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 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 SharkNativeWrapper : public SharkCompileInvariants { 27 friend class SharkStackWithNativeFrame; 28 29 public: 30 static SharkNativeWrapper* build(SharkBuilder* builder, 31 methodHandle target, 32 const char* name, 33 BasicType* arg_types, 34 BasicType return_type) { 35 return new SharkNativeWrapper(builder, 36 target, 37 name, 38 arg_types, 39 return_type); 40 } 41 42 private: 43 SharkNativeWrapper(SharkBuilder* builder, 44 methodHandle target, 45 const char* name, 46 BasicType* arg_types, 47 BasicType return_type) 48 : SharkCompileInvariants(NULL, builder), 49 _target(target), 50 _arg_types(arg_types), 51 _return_type(return_type), 52 _lock_slot_offset(0) { initialize(name); } 53 54 private: 55 void initialize(const char* name); 56 57 private: 58 methodHandle _target; 59 BasicType* _arg_types; 60 BasicType _return_type; 61 llvm::Function* _function; 62 SharkStack* _stack; 63 llvm::Value* _oop_tmp_slot; 64 OopMapSet* _oop_maps; 65 int _receiver_slot_offset; 66 int _lock_slot_offset; 67 68 // The method being compiled. 69 protected: 70 methodHandle target() const { 71 return _target; 72 } 73 74 // Properties of the method. 75 protected: 76 int arg_size() const { 77 return target()->size_of_parameters(); 78 } 79 BasicType arg_type(int i) const { 80 return _arg_types[i]; 81 } 82 BasicType return_type() const { 83 return _return_type; 84 } 85 bool is_static() const { 86 return target()->is_static(); 87 } 88 bool is_synchronized() const { 89 return target()->is_synchronized(); 90 } 91 bool is_returning_oop() const { 92 return target()->is_returning_oop(); 93 } 94 95 // The LLVM function we are building. 96 public: 97 llvm::Function* function() const { 98 return _function; 99 } 100 101 // The Zero stack and our frame on it. 102 protected: 103 SharkStack* stack() const { 104 return _stack; 105 } 106 107 // Temporary oop storage. 108 protected: 109 llvm::Value* oop_tmp_slot() const { 110 assert(is_static() || is_returning_oop(), "should be"); 111 return _oop_tmp_slot; 112 } 113 114 // Information required by nmethod::new_native_nmethod(). 115 public: 116 int frame_size() const { 117 return stack()->oopmap_frame_size(); 118 } 119 ByteSize receiver_offset() const { 120 return in_ByteSize(_receiver_slot_offset * wordSize); 121 } 122 ByteSize lock_offset() const { 123 return in_ByteSize(_lock_slot_offset * wordSize); 124 } 125 OopMapSet* oop_maps() const { 126 return _oop_maps; 127 } 128 129 // Helpers. 130 private: 131 llvm::BasicBlock* CreateBlock(const char* name = "") const { 132 return llvm::BasicBlock::Create(SharkContext::current(), name, function()); 133 } 134 llvm::Value* thread_state_address() const { 135 return builder()->CreateAddressOfStructEntry( 136 thread(), JavaThread::thread_state_offset(), 137 llvm::PointerType::getUnqual(SharkType::jint_type()), 138 "thread_state_address"); 139 } 140 llvm::Value* pending_exception_address() const { 141 return builder()->CreateAddressOfStructEntry( 142 thread(), Thread::pending_exception_offset(), 143 llvm::PointerType::getUnqual(SharkType::oop_type()), 144 "pending_exception_address"); 145 } 146 void CreateSetThreadState(JavaThreadState state) const { 147 builder()->CreateStore( 148 LLVMValue::jint_constant(state), thread_state_address()); 149 } 150 void CreateWriteMemorySerializePage() const { 151 builder()->CreateStore( 152 LLVMValue::jint_constant(1), 153 builder()->CreateIntToPtr( 154 builder()->CreateAdd( 155 LLVMValue::intptr_constant( 156 (intptr_t) os::get_memory_serialize_page()), 157 builder()->CreateAnd( 158 builder()->CreateLShr( 159 builder()->CreatePtrToInt(thread(), SharkType::intptr_type()), 160 LLVMValue::intptr_constant(os::get_serialize_page_shift_count())), 161 LLVMValue::intptr_constant(os::get_serialize_page_mask()))), 162 llvm::PointerType::getUnqual(SharkType::jint_type()))); 163 } 164 void CreateResetHandleBlock() const { 165 llvm::Value *active_handles = builder()->CreateValueOfStructEntry( 166 thread(), 167 JavaThread::active_handles_offset(), 168 SharkType::jniHandleBlock_type(), 169 "active_handles"); 170 builder()->CreateStore( 171 LLVMValue::intptr_constant(0), 172 builder()->CreateAddressOfStructEntry( 173 active_handles, 174 in_ByteSize(JNIHandleBlock::top_offset_in_bytes()), 175 llvm::PointerType::getUnqual(SharkType::intptr_type()), 176 "top")); 177 } 178 llvm::LoadInst* CreateLoadPendingException() const { 179 return builder()->CreateLoad( 180 pending_exception_address(), "pending_exception"); 181 } 182 };