abstractInterpreter.hpp revision 5945:d2907f74462e
1/* 2 * Copyright (c) 1997, 2012, 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/thread.inline.hpp" 31#include "runtime/vmThread.hpp" 32#include "utilities/top.hpp" 33#ifdef TARGET_ARCH_MODEL_x86_32 34# include "interp_masm_x86_32.hpp" 35#endif 36#ifdef TARGET_ARCH_MODEL_x86_64 37# include "interp_masm_x86_64.hpp" 38#endif 39#ifdef TARGET_ARCH_MODEL_sparc 40# include "interp_masm_sparc.hpp" 41#endif 42#ifdef TARGET_ARCH_MODEL_zero 43# include "interp_masm_zero.hpp" 44#endif 45#ifdef TARGET_ARCH_MODEL_arm 46# include "interp_masm_arm.hpp" 47#endif 48#ifdef TARGET_ARCH_MODEL_ppc_32 49# include "interp_masm_ppc_32.hpp" 50#endif 51#ifdef TARGET_ARCH_MODEL_ppc_64 52# include "interp_masm_ppc_64.hpp" 53#endif 54 55// This file contains the platform-independent parts 56// of the abstract interpreter and the abstract interpreter generator. 57 58// Organization of the interpreter(s). There exists two different interpreters in hotpot 59// an assembly language version (aka template interpreter) and a high level language version 60// (aka c++ interpreter). Th division of labor is as follows: 61 62// Template Interpreter C++ Interpreter Functionality 63// 64// templateTable* bytecodeInterpreter* actual interpretation of bytecodes 65// 66// templateInterpreter* cppInterpreter* generation of assembly code that creates 67// and manages interpreter runtime frames. 68// Also code for populating interpreter 69// frames created during deoptimization. 70// 71// For both template and c++ interpreter. There are common files for aspects of the interpreter 72// that are generic to both interpreters. This is the layout: 73// 74// abstractInterpreter.hpp: generic description of the interpreter. 75// interpreter*: generic frame creation and handling. 76// 77 78//------------------------------------------------------------------------------------------------------------------------ 79// The C++ interface to the bytecode interpreter(s). 80 81class AbstractInterpreter: AllStatic { 82 friend class VMStructs; 83 friend class Interpreter; 84 friend class CppInterpreterGenerator; 85 public: 86 enum MethodKind { 87 zerolocals, // method needs locals initialization 88 zerolocals_synchronized, // method needs locals initialization & is synchronized 89 native, // native method 90 native_synchronized, // native method & is synchronized 91 empty, // empty method (code: _return) 92 accessor, // accessor method (code: _aload_0, _getfield, _(a|i)return) 93 abstract, // abstract method (throws an AbstractMethodException) 94 method_handle_invoke_FIRST, // java.lang.invoke.MethodHandles::invokeExact, etc. 95 method_handle_invoke_LAST = (method_handle_invoke_FIRST 96 + (vmIntrinsics::LAST_MH_SIG_POLY 97 - vmIntrinsics::FIRST_MH_SIG_POLY)), 98 java_lang_math_sin, // implementation of java.lang.Math.sin (x) 99 java_lang_math_cos, // implementation of java.lang.Math.cos (x) 100 java_lang_math_tan, // implementation of java.lang.Math.tan (x) 101 java_lang_math_abs, // implementation of java.lang.Math.abs (x) 102 java_lang_math_sqrt, // implementation of java.lang.Math.sqrt (x) 103 java_lang_math_log, // implementation of java.lang.Math.log (x) 104 java_lang_math_log10, // implementation of java.lang.Math.log10 (x) 105 java_lang_math_pow, // implementation of java.lang.Math.pow (x,y) 106 java_lang_math_exp, // implementation of java.lang.Math.exp (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 // Conversion from the part of the above enum to vmIntrinsics::_invokeExact, etc. 113 static vmIntrinsics::ID method_handle_intrinsic(MethodKind kind) { 114 if (kind >= method_handle_invoke_FIRST && kind <= method_handle_invoke_LAST) 115 return (vmIntrinsics::ID)( vmIntrinsics::FIRST_MH_SIG_POLY + (kind - method_handle_invoke_FIRST) ); 116 else 117 return vmIntrinsics::_none; 118 } 119 120 enum SomeConstants { 121 number_of_result_handlers = 10 // number of result handlers for native calls 122 }; 123 124 protected: 125 static StubQueue* _code; // the interpreter code (codelets) 126 127 static bool _notice_safepoints; // true if safepoints are activated 128 129 static address _native_entry_begin; // Region for native entry code 130 static address _native_entry_end; 131 132 // method entry points 133 static address _entry_table[number_of_method_entries]; // entry points for a given method 134 static address _native_abi_to_tosca[number_of_result_handlers]; // for native method result handlers 135 static address _slow_signature_handler; // the native method generic (slow) signature handler 136 137 static address _rethrow_exception_entry; // rethrows an activation in previous frame 138 139 friend class AbstractInterpreterGenerator; 140 friend class InterpreterGenerator; 141 friend class InterpreterMacroAssembler; 142 143 public: 144 // Initialization/debugging 145 static void initialize(); 146 static StubQueue* code() { return _code; } 147 148 149 // Method activation 150 static MethodKind method_kind(methodHandle m); 151 static address entry_for_kind(MethodKind k) { assert(0 <= k && k < number_of_method_entries, "illegal kind"); return _entry_table[k]; } 152 static address entry_for_method(methodHandle m) { return entry_for_kind(method_kind(m)); } 153 154 // used for bootstrapping method handles: 155 static void set_entry_for_kind(MethodKind k, address e); 156 157 static void print_method_kind(MethodKind kind) PRODUCT_RETURN; 158 159 static bool can_be_compiled(methodHandle m); 160 161 // Runtime support 162 163 // length = invoke bytecode length (to advance to next bytecode) 164 static address deopt_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; } 165 static address return_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; } 166 167 static address rethrow_exception_entry() { return _rethrow_exception_entry; } 168 169 // Activation size in words for a method that is just being called. 170 // Parameters haven't been pushed so count them too. 171 static int size_top_interpreter_activation(Method* method); 172 173 // Deoptimization support 174 // Compute the entry address for continuation after 175 static address deopt_continue_after_entry(Method* method, 176 address bcp, 177 int callee_parameters, 178 bool is_top_frame); 179 // Compute the entry address for reexecution 180 static address deopt_reexecute_entry(Method* method, address bcp); 181 // Deoptimization should reexecute this bytecode 182 static bool bytecode_should_reexecute(Bytecodes::Code code); 183 184 // share implementation of size_activation and layout_activation: 185 static int size_activation(Method* method, 186 int temps, 187 int popframe_args, 188 int monitors, 189 int caller_actual_parameters, 190 int callee_params, 191 int callee_locals, 192 bool is_top_frame, 193 bool is_bottom_frame) { 194 return layout_activation(method, 195 temps, 196 popframe_args, 197 monitors, 198 caller_actual_parameters, 199 callee_params, 200 callee_locals, 201 (frame*)NULL, 202 (frame*)NULL, 203 is_top_frame, 204 is_bottom_frame); 205 } 206 207 static int layout_activation(Method* method, 208 int temps, 209 int popframe_args, 210 int monitors, 211 int caller_actual_parameters, 212 int callee_params, 213 int callee_locals, 214 frame* caller, 215 frame* interpreter_frame, 216 bool is_top_frame, 217 bool is_bottom_frame); 218 219 // Runtime support 220 static bool is_not_reached( methodHandle method, int bci); 221 // Safepoint support 222 static void notice_safepoints() { ShouldNotReachHere(); } // stops the thread when reaching a safepoint 223 static void ignore_safepoints() { ShouldNotReachHere(); } // ignores safepoints 224 225 // Support for native calls 226 static address slow_signature_handler() { return _slow_signature_handler; } 227 static address result_handler(BasicType type) { return _native_abi_to_tosca[BasicType_as_index(type)]; } 228 static int BasicType_as_index(BasicType type); // computes index into result_handler_by_index table 229 static bool in_native_entry(address pc) { return _native_entry_begin <= pc && pc < _native_entry_end; } 230 // Debugging/printing 231 static void print(); // prints the interpreter code 232 233 public: 234 // Interpreter helpers 235 const static int stackElementWords = 1; 236 const static int stackElementSize = stackElementWords * wordSize; 237 const static int logStackElementSize = LogBytesPerWord; 238 239 // Local values relative to locals[n] 240 static int local_offset_in_bytes(int n) { 241 return ((frame::interpreter_frame_expression_stack_direction() * n) * stackElementSize); 242 } 243 244 // access to stacked values according to type: 245 static oop* oop_addr_in_slot(intptr_t* slot_addr) { 246 return (oop*) slot_addr; 247 } 248 static jint* int_addr_in_slot(intptr_t* slot_addr) { 249 if ((int) sizeof(jint) < wordSize && !Bytes::is_Java_byte_ordering_different()) 250 // big-endian LP64 251 return (jint*)(slot_addr + 1) - 1; 252 else 253 return (jint*) slot_addr; 254 } 255 static jlong long_in_slot(intptr_t* slot_addr) { 256 if (sizeof(intptr_t) >= sizeof(jlong)) { 257 return *(jlong*) slot_addr; 258 } else { 259 return Bytes::get_native_u8((address)slot_addr); 260 } 261 } 262 static void set_long_in_slot(intptr_t* slot_addr, jlong value) { 263 if (sizeof(intptr_t) >= sizeof(jlong)) { 264 *(jlong*) slot_addr = value; 265 } else { 266 Bytes::put_native_u8((address)slot_addr, value); 267 } 268 } 269 static void get_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) { 270 switch (type) { 271 case T_BOOLEAN: value->z = *int_addr_in_slot(slot_addr); break; 272 case T_CHAR: value->c = *int_addr_in_slot(slot_addr); break; 273 case T_BYTE: value->b = *int_addr_in_slot(slot_addr); break; 274 case T_SHORT: value->s = *int_addr_in_slot(slot_addr); break; 275 case T_INT: value->i = *int_addr_in_slot(slot_addr); break; 276 case T_LONG: value->j = long_in_slot(slot_addr); break; 277 case T_FLOAT: value->f = *(jfloat*)int_addr_in_slot(slot_addr); break; 278 case T_DOUBLE: value->d = jdouble_cast(long_in_slot(slot_addr)); break; 279 case T_OBJECT: value->l = (jobject)*oop_addr_in_slot(slot_addr); break; 280 default: ShouldNotReachHere(); 281 } 282 } 283 static void set_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) { 284 switch (type) { 285 case T_BOOLEAN: *int_addr_in_slot(slot_addr) = (value->z != 0); break; 286 case T_CHAR: *int_addr_in_slot(slot_addr) = value->c; break; 287 case T_BYTE: *int_addr_in_slot(slot_addr) = value->b; break; 288 case T_SHORT: *int_addr_in_slot(slot_addr) = value->s; break; 289 case T_INT: *int_addr_in_slot(slot_addr) = value->i; break; 290 case T_LONG: set_long_in_slot(slot_addr, value->j); break; 291 case T_FLOAT: *(jfloat*)int_addr_in_slot(slot_addr) = value->f; break; 292 case T_DOUBLE: set_long_in_slot(slot_addr, jlong_cast(value->d)); break; 293 case T_OBJECT: *oop_addr_in_slot(slot_addr) = (oop) value->l; break; 294 default: ShouldNotReachHere(); 295 } 296 } 297}; 298 299//------------------------------------------------------------------------------------------------------------------------ 300// The interpreter generator. 301 302class Template; 303class AbstractInterpreterGenerator: public StackObj { 304 protected: 305 InterpreterMacroAssembler* _masm; 306 307 // shared code sequences 308 // Converter for native abi result to tosca result 309 address generate_result_handler_for(BasicType type); 310 address generate_slow_signature_handler(); 311 312 // entry point generator 313 address generate_method_entry(AbstractInterpreter::MethodKind kind); 314 315 void bang_stack_shadow_pages(bool native_call); 316 317 void generate_all(); 318 void initialize_method_handle_entries(); 319 320 public: 321 AbstractInterpreterGenerator(StubQueue* _code); 322}; 323 324#endif // SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP 325