1 /* 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 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 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 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 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP 26 #define SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP 27 28 #include "code/stubs.hpp" 29 #include "interpreter/bytecodes.hpp" 30 #include "runtime/vmThread.hpp" 31 #include "utilities/top.hpp" 32 #ifdef TARGET_ARCH_MODEL_x86_32 33 # include "interp_masm_x86_32.hpp" 34 #endif 35 #ifdef TARGET_ARCH_MODEL_x86_64 36 # include "interp_masm_x86_64.hpp" 37 #endif 38 #ifdef TARGET_ARCH_MODEL_sparc 39 # include "interp_masm_sparc.hpp" 40 #endif 41 #ifdef TARGET_ARCH_MODEL_zero 42 # include "interp_masm_zero.hpp" 43 #endif 44 #ifdef TARGET_ARCH_MODEL_arm 45 # include "interp_masm_arm.hpp" 46 #endif 47 #ifdef TARGET_ARCH_MODEL_ppc 48 # include "interp_masm_ppc.hpp" 49 #endif 50 #ifdef TARGET_OS_FAMILY_linux 51 # include "thread_linux.inline.hpp" 52 #endif 53 #ifdef TARGET_OS_FAMILY_solaris 54 # include "thread_solaris.inline.hpp" 55 #endif 56 #ifdef TARGET_OS_FAMILY_windows 57 # include "thread_windows.inline.hpp" 58 #endif 59 60 // This file contains the platform-independent parts 61 // of the abstract interpreter and the abstract interpreter generator. 62 63 // Organization of the interpreter(s). There exists two different interpreters in hotpot 64 // an assembly language version (aka template interpreter) and a high level language version 65 // (aka c++ interpreter). Th division of labor is as follows: 66 67 // Template Interpreter C++ Interpreter Functionality 68 // 69 // templateTable* bytecodeInterpreter* actual interpretation of bytecodes 70 // 71 // templateInterpreter* cppInterpreter* generation of assembly code that creates 72 // and manages interpreter runtime frames. 73 // Also code for populating interpreter 74 // frames created during deoptimization. 75 // 76 // For both template and c++ interpreter. There are common files for aspects of the interpreter 77 // that are generic to both interpreters. This is the layout: 78 // 79 // abstractInterpreter.hpp: generic description of the interpreter. 80 // interpreter*: generic frame creation and handling. 81 // 82 83 //------------------------------------------------------------------------------------------------------------------------ 84 // The C++ interface to the bytecode interpreter(s). 85 86 class AbstractInterpreter: AllStatic { 87 friend class VMStructs; 88 friend class Interpreter; 89 friend class CppInterpreterGenerator; 90 public: 91 enum MethodKind { 92 zerolocals, // method needs locals initialization 93 zerolocals_synchronized, // method needs locals initialization & is synchronized 94 native, // native method 95 native_synchronized, // native method & is synchronized 96 empty, // empty method (code: _return) 97 accessor, // accessor method (code: _aload_0, _getfield, _(a|i)return) 98 abstract, // abstract method (throws an AbstractMethodException) 99 method_handle, // java.dyn.MethodHandles::invoke 100 java_lang_math_sin, // implementation of java.lang.Math.sin (x) 101 java_lang_math_cos, // implementation of java.lang.Math.cos (x) 102 java_lang_math_tan, // implementation of java.lang.Math.tan (x) 103 java_lang_math_abs, // implementation of java.lang.Math.abs (x) 104 java_lang_math_sqrt, // implementation of java.lang.Math.sqrt (x) 105 java_lang_math_log, // implementation of java.lang.Math.log (x) 106 java_lang_math_log10, // implementation of java.lang.Math.log10 (x) 107 java_lang_ref_reference_get, // implementation of java.lang.ref.Reference.get() 108 number_of_method_entries, 109 invalid = -1 110 }; 111 112 enum SomeConstants { 113 number_of_result_handlers = 10 // number of result handlers for native calls 114 }; 115 116 protected: 117 static StubQueue* _code; // the interpreter code (codelets) 118 119 static bool _notice_safepoints; // true if safepoints are activated 120 121 static address _native_entry_begin; // Region for native entry code 122 static address _native_entry_end; 123 124 // method entry points 125 static address _entry_table[number_of_method_entries]; // entry points for a given method 126 static address _native_abi_to_tosca[number_of_result_handlers]; // for native method result handlers 127 static address _slow_signature_handler; // the native method generic (slow) signature handler 128 129 static address _rethrow_exception_entry; // rethrows an activation in previous frame 130 131 friend class AbstractInterpreterGenerator; 132 friend class InterpreterGenerator; 133 friend class InterpreterMacroAssembler; 134 135 public: 136 // Initialization/debugging 137 static void initialize(); 138 static StubQueue* code() { return _code; } 139 140 141 // Method activation 142 static MethodKind method_kind(methodHandle m); 143 static address entry_for_kind(MethodKind k) { assert(0 <= k && k < number_of_method_entries, "illegal kind"); return _entry_table[k]; } 144 static address entry_for_method(methodHandle m) { return entry_for_kind(method_kind(m)); } 145 146 static void print_method_kind(MethodKind kind) PRODUCT_RETURN; 147 148 static bool can_be_compiled(methodHandle m); 149 150 // Runtime support 151 152 // length = invoke bytecode length (to advance to next bytecode) 153 static address deopt_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; } 154 static address return_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; } 155 156 static address rethrow_exception_entry() { return _rethrow_exception_entry; } 157 158 // Activation size in words for a method that is just being called. 159 // Parameters haven't been pushed so count them too. 160 static int size_top_interpreter_activation(methodOop method); 161 162 // Deoptimization support 163 // Compute the entry address for continuation after 164 static address deopt_continue_after_entry(methodOop method, 165 address bcp, 166 int callee_parameters, 167 bool is_top_frame); 168 // Compute the entry address for reexecution 169 static address deopt_reexecute_entry(methodOop method, address bcp); 170 // Deoptimization should reexecute this bytecode 171 static bool bytecode_should_reexecute(Bytecodes::Code code); 172 173 // share implementation of size_activation and layout_activation: 174 static int size_activation(methodOop method, 175 int temps, 176 int popframe_args, 177 int monitors, 178 int callee_params, 179 int callee_locals, 180 bool is_top_frame); 181 182 static int layout_activation(methodOop method, 183 int temps, 184 int popframe_args, 185 int monitors, 186 int callee_params, 187 int callee_locals, 188 frame* caller, 189 frame* interpreter_frame, 190 bool is_top_frame); 191 192 // Runtime support 193 static bool is_not_reached( methodHandle method, int bci); 194 // Safepoint support 195 static void notice_safepoints() { ShouldNotReachHere(); } // stops the thread when reaching a safepoint 196 static void ignore_safepoints() { ShouldNotReachHere(); } // ignores safepoints 197 198 // Support for native calls 199 static address slow_signature_handler() { return _slow_signature_handler; } 200 static address result_handler(BasicType type) { return _native_abi_to_tosca[BasicType_as_index(type)]; } 201 static int BasicType_as_index(BasicType type); // computes index into result_handler_by_index table 202 static bool in_native_entry(address pc) { return _native_entry_begin <= pc && pc < _native_entry_end; } 203 // Debugging/printing 204 static void print(); // prints the interpreter code 205 206 public: 207 // Interpreter helpers 208 const static int stackElementWords = 1; 209 const static int stackElementSize = stackElementWords * wordSize; 210 const static int logStackElementSize = LogBytesPerWord; 211 212 // Local values relative to locals[n] 213 static int local_offset_in_bytes(int n) { 214 return ((frame::interpreter_frame_expression_stack_direction() * n) * stackElementSize); 215 } 216 217 // access to stacked values according to type: 218 static oop* oop_addr_in_slot(intptr_t* slot_addr) { 219 return (oop*) slot_addr; 220 } 221 static jint* int_addr_in_slot(intptr_t* slot_addr) { 222 if ((int) sizeof(jint) < wordSize && !Bytes::is_Java_byte_ordering_different()) 223 // big-endian LP64 224 return (jint*)(slot_addr + 1) - 1; 225 else 226 return (jint*) slot_addr; 227 } 228 static jlong long_in_slot(intptr_t* slot_addr) { 229 if (sizeof(intptr_t) >= sizeof(jlong)) { 230 return *(jlong*) slot_addr; 231 } else { 232 return Bytes::get_native_u8((address)slot_addr); 233 } 234 } 235 static void set_long_in_slot(intptr_t* slot_addr, jlong value) { 236 if (sizeof(intptr_t) >= sizeof(jlong)) { 237 *(jlong*) slot_addr = value; 238 } else { 239 Bytes::put_native_u8((address)slot_addr, value); 240 } 241 } 242 static void get_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) { 243 switch (type) { 244 case T_BOOLEAN: value->z = *int_addr_in_slot(slot_addr); break; 245 case T_CHAR: value->c = *int_addr_in_slot(slot_addr); break; 246 case T_BYTE: value->b = *int_addr_in_slot(slot_addr); break; 247 case T_SHORT: value->s = *int_addr_in_slot(slot_addr); break; 248 case T_INT: value->i = *int_addr_in_slot(slot_addr); break; 249 case T_LONG: value->j = long_in_slot(slot_addr); break; 250 case T_FLOAT: value->f = *(jfloat*)int_addr_in_slot(slot_addr); break; 251 case T_DOUBLE: value->d = jdouble_cast(long_in_slot(slot_addr)); break; 252 case T_OBJECT: value->l = (jobject)*oop_addr_in_slot(slot_addr); break; 253 default: ShouldNotReachHere(); 254 } 255 } 256 static void set_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) { 257 switch (type) { 258 case T_BOOLEAN: *int_addr_in_slot(slot_addr) = (value->z != 0); break; 259 case T_CHAR: *int_addr_in_slot(slot_addr) = value->c; break; 260 case T_BYTE: *int_addr_in_slot(slot_addr) = value->b; break; 261 case T_SHORT: *int_addr_in_slot(slot_addr) = value->s; break; 262 case T_INT: *int_addr_in_slot(slot_addr) = value->i; break; 263 case T_LONG: set_long_in_slot(slot_addr, value->j); break; 264 case T_FLOAT: *(jfloat*)int_addr_in_slot(slot_addr) = value->f; break; 265 case T_DOUBLE: set_long_in_slot(slot_addr, jlong_cast(value->d)); break; 266 case T_OBJECT: *oop_addr_in_slot(slot_addr) = (oop) value->l; break; 267 default: ShouldNotReachHere(); 268 } 269 } 270 }; 271 272 //------------------------------------------------------------------------------------------------------------------------ 273 // The interpreter generator. 274 275 class Template; 276 class AbstractInterpreterGenerator: public StackObj { 277 protected: 278 InterpreterMacroAssembler* _masm; 279 280 // shared code sequences 281 // Converter for native abi result to tosca result 282 address generate_result_handler_for(BasicType type); 283 address generate_slow_signature_handler(); 284 285 // entry point generator 286 address generate_method_entry(AbstractInterpreter::MethodKind kind); 287 288 void bang_stack_shadow_pages(bool native_call); 289 290 void generate_all(); 291 292 public: 293 AbstractInterpreterGenerator(StubQueue* _code); 294 }; 295 296 #endif // SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP