1 /* 2 * Copyright (c) 1997, 2013, 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_x86 34 # include "interp_masm_x86.hpp" 35 #endif 36 #ifdef TARGET_ARCH_MODEL_sparc 37 # include "interp_masm_sparc.hpp" 38 #endif 39 #ifdef TARGET_ARCH_MODEL_zero 40 # include "interp_masm_zero.hpp" 41 #endif 42 #ifdef TARGET_ARCH_MODEL_arm 43 # include "interp_masm_arm.hpp" 44 #endif 45 #ifdef TARGET_ARCH_MODEL_ppc 46 # include "interp_masm_ppc.hpp" 47 #endif 48 49 // This file contains the platform-independent parts 50 // of the abstract interpreter and the abstract interpreter generator. 51 52 // Organization of the interpreter(s). There exists two different interpreters in hotpot 53 // an assembly language version (aka template interpreter) and a high level language version 54 // (aka c++ interpreter). Th division of labor is as follows: 55 56 // Template Interpreter C++ Interpreter Functionality 57 // 58 // templateTable* bytecodeInterpreter* actual interpretation of bytecodes 59 // 60 // templateInterpreter* cppInterpreter* generation of assembly code that creates 61 // and manages interpreter runtime frames. 62 // Also code for populating interpreter 63 // frames created during deoptimization. 64 // 65 // For both template and c++ interpreter. There are common files for aspects of the interpreter 66 // that are generic to both interpreters. This is the layout: 67 // 68 // abstractInterpreter.hpp: generic description of the interpreter. 69 // interpreter*: generic frame creation and handling. 70 // 71 72 //------------------------------------------------------------------------------------------------------------------------ 73 // The C++ interface to the bytecode interpreter(s). 74 75 class AbstractInterpreter: AllStatic { 76 friend class VMStructs; 77 friend class Interpreter; 78 friend class CppInterpreterGenerator; 79 public: 80 enum MethodKind { 81 zerolocals, // method needs locals initialization 82 zerolocals_synchronized, // method needs locals initialization & is synchronized 83 native, // native method 84 native_synchronized, // native method & is synchronized 85 empty, // empty method (code: _return) 86 accessor, // accessor method (code: _aload_0, _getfield, _(a|i)return) 87 abstract, // abstract method (throws an AbstractMethodException) 88 method_handle_invoke_FIRST, // java.lang.invoke.MethodHandles::invokeExact, etc. 89 method_handle_invoke_LAST = (method_handle_invoke_FIRST 90 + (vmIntrinsics::LAST_MH_SIG_POLY 91 - vmIntrinsics::FIRST_MH_SIG_POLY)), 92 java_lang_math_sin, // implementation of java.lang.Math.sin (x) 93 java_lang_math_cos, // implementation of java.lang.Math.cos (x) 94 java_lang_math_tan, // implementation of java.lang.Math.tan (x) 95 java_lang_math_abs, // implementation of java.lang.Math.abs (x) 96 java_lang_math_sqrt, // implementation of java.lang.Math.sqrt (x) 97 java_lang_math_log, // implementation of java.lang.Math.log (x) 98 java_lang_math_log10, // implementation of java.lang.Math.log10 (x) 99 java_lang_math_pow, // implementation of java.lang.Math.pow (x,y) 100 java_lang_math_exp, // implementation of java.lang.Math.exp (x) 101 java_lang_ref_reference_get, // implementation of java.lang.ref.Reference.get() 102 java_util_zip_CRC32_update, // implementation of java.util.zip.CRC32.update() 103 java_util_zip_CRC32_updateBytes, // implementation of java.util.zip.CRC32.updateBytes() 104 java_util_zip_CRC32_updateByteBuffer, // implementation of java.util.zip.CRC32.updateByteBuffer() 105 number_of_method_entries, 106 invalid = -1 107 }; 108 109 // Conversion from the part of the above enum to vmIntrinsics::_invokeExact, etc. 110 static vmIntrinsics::ID method_handle_intrinsic(MethodKind kind) { 111 if (kind >= method_handle_invoke_FIRST && kind <= method_handle_invoke_LAST) 112 return (vmIntrinsics::ID)( vmIntrinsics::FIRST_MH_SIG_POLY + (kind - method_handle_invoke_FIRST) ); 113 else 114 return vmIntrinsics::_none; 115 } 116 117 enum SomeConstants { 118 number_of_result_handlers = 10 // number of result handlers for native calls 119 }; 120 121 protected: 122 static StubQueue* _code; // the interpreter code (codelets) 123 124 static bool _notice_safepoints; // true if safepoints are activated 125 126 static address _native_entry_begin; // Region for native entry code 127 static address _native_entry_end; 128 129 // method entry points 130 static address _entry_table[number_of_method_entries]; // entry points for a given method 131 static address _native_abi_to_tosca[number_of_result_handlers]; // for native method result handlers 132 static address _slow_signature_handler; // the native method generic (slow) signature handler 133 134 static address _rethrow_exception_entry; // rethrows an activation in previous frame 135 136 friend class AbstractInterpreterGenerator; 137 friend class InterpreterGenerator; 138 friend class InterpreterMacroAssembler; 139 140 public: 141 // Initialization/debugging 142 static void initialize(); 143 static StubQueue* code() { return _code; } 144 145 146 // Method activation 147 static MethodKind method_kind(methodHandle m); 148 static address entry_for_kind(MethodKind k) { assert(0 <= k && k < number_of_method_entries, "illegal kind"); return _entry_table[k]; } 149 static address entry_for_method(methodHandle m) { return entry_for_kind(method_kind(m)); } 150 151 // used for bootstrapping method handles: 152 static void set_entry_for_kind(MethodKind k, address e); 153 154 static void print_method_kind(MethodKind kind) PRODUCT_RETURN; 155 156 static bool can_be_compiled(methodHandle m); 157 158 // Runtime support 159 160 // length = invoke bytecode length (to advance to next bytecode) 161 static address deopt_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; } 162 static address return_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; } 163 164 static address rethrow_exception_entry() { return _rethrow_exception_entry; } 165 166 // Activation size in words for a method that is just being called. 167 // Parameters haven't been pushed so count them too. 168 static int size_top_interpreter_activation(Method* method); 169 170 // Deoptimization support 171 // Compute the entry address for continuation after 172 static address deopt_continue_after_entry(Method* method, 173 address bcp, 174 int callee_parameters, 175 bool is_top_frame); 176 // Compute the entry address for reexecution 177 static address deopt_reexecute_entry(Method* method, address bcp); 178 // Deoptimization should reexecute this bytecode 179 static bool bytecode_should_reexecute(Bytecodes::Code code); 180 181 // share implementation of size_activation and layout_activation: 182 static int size_activation(Method* method, 183 int temps, 184 int popframe_args, 185 int monitors, 186 int caller_actual_parameters, 187 int callee_params, 188 int callee_locals, 189 bool is_top_frame, 190 bool is_bottom_frame) { 191 return layout_activation(method, 192 temps, 193 popframe_args, 194 monitors, 195 caller_actual_parameters, 196 callee_params, 197 callee_locals, 198 (frame*)NULL, 199 (frame*)NULL, 200 is_top_frame, 201 is_bottom_frame); 202 } 203 204 static int layout_activation(Method* method, 205 int temps, 206 int popframe_args, 207 int monitors, 208 int caller_actual_parameters, 209 int callee_params, 210 int callee_locals, 211 frame* caller, 212 frame* interpreter_frame, 213 bool is_top_frame, 214 bool is_bottom_frame); 215 216 // Runtime support 217 static bool is_not_reached( methodHandle method, int bci); 218 // Safepoint support 219 static void notice_safepoints() { ShouldNotReachHere(); } // stops the thread when reaching a safepoint 220 static void ignore_safepoints() { ShouldNotReachHere(); } // ignores safepoints 221 222 // Support for native calls 223 static address slow_signature_handler() { return _slow_signature_handler; } 224 static address result_handler(BasicType type) { return _native_abi_to_tosca[BasicType_as_index(type)]; } 225 static int BasicType_as_index(BasicType type); // computes index into result_handler_by_index table 226 static bool in_native_entry(address pc) { return _native_entry_begin <= pc && pc < _native_entry_end; } 227 // Debugging/printing 228 static void print(); // prints the interpreter code 229 230 public: 231 // Interpreter helpers 232 const static int stackElementWords = 1; 233 const static int stackElementSize = stackElementWords * wordSize; 234 const static int logStackElementSize = LogBytesPerWord; 235 236 // Local values relative to locals[n] 237 static int local_offset_in_bytes(int n) { 238 return ((frame::interpreter_frame_expression_stack_direction() * n) * stackElementSize); 239 } 240 241 // access to stacked values according to type: 242 static oop* oop_addr_in_slot(intptr_t* slot_addr) { 243 return (oop*) slot_addr; 244 } 245 static jint* int_addr_in_slot(intptr_t* slot_addr) { 246 if ((int) sizeof(jint) < wordSize && !Bytes::is_Java_byte_ordering_different()) 247 // big-endian LP64 248 return (jint*)(slot_addr + 1) - 1; 249 else 250 return (jint*) slot_addr; 251 } 252 static jlong long_in_slot(intptr_t* slot_addr) { 253 if (sizeof(intptr_t) >= sizeof(jlong)) { 254 return *(jlong*) slot_addr; 255 } else { 256 return Bytes::get_native_u8((address)slot_addr); 257 } 258 } 259 static void set_long_in_slot(intptr_t* slot_addr, jlong value) { 260 if (sizeof(intptr_t) >= sizeof(jlong)) { 261 *(jlong*) slot_addr = value; 262 } else { 263 Bytes::put_native_u8((address)slot_addr, value); 264 } 265 } 266 static void get_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) { 267 switch (type) { 268 case T_BOOLEAN: value->z = *int_addr_in_slot(slot_addr); break; 269 case T_CHAR: value->c = *int_addr_in_slot(slot_addr); break; 270 case T_BYTE: value->b = *int_addr_in_slot(slot_addr); break; 271 case T_SHORT: value->s = *int_addr_in_slot(slot_addr); break; 272 case T_INT: value->i = *int_addr_in_slot(slot_addr); break; 273 case T_LONG: value->j = long_in_slot(slot_addr); break; 274 case T_FLOAT: value->f = *(jfloat*)int_addr_in_slot(slot_addr); break; 275 case T_DOUBLE: value->d = jdouble_cast(long_in_slot(slot_addr)); break; 276 case T_OBJECT: value->l = (jobject)*oop_addr_in_slot(slot_addr); break; 277 default: ShouldNotReachHere(); 278 } 279 } 280 static void set_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) { 281 switch (type) { 282 case T_BOOLEAN: *int_addr_in_slot(slot_addr) = (value->z != 0); break; 283 case T_CHAR: *int_addr_in_slot(slot_addr) = value->c; break; 284 case T_BYTE: *int_addr_in_slot(slot_addr) = value->b; break; 285 case T_SHORT: *int_addr_in_slot(slot_addr) = value->s; break; 286 case T_INT: *int_addr_in_slot(slot_addr) = value->i; break; 287 case T_LONG: set_long_in_slot(slot_addr, value->j); break; 288 case T_FLOAT: *(jfloat*)int_addr_in_slot(slot_addr) = value->f; break; 289 case T_DOUBLE: set_long_in_slot(slot_addr, jlong_cast(value->d)); break; 290 case T_OBJECT: *oop_addr_in_slot(slot_addr) = (oop) value->l; break; 291 default: ShouldNotReachHere(); 292 } 293 } 294 }; 295 296 //------------------------------------------------------------------------------------------------------------------------ 297 // The interpreter generator. 298 299 class Template; 300 class AbstractInterpreterGenerator: public StackObj { 301 protected: 302 InterpreterMacroAssembler* _masm; 303 304 // shared code sequences 305 // Converter for native abi result to tosca result 306 address generate_result_handler_for(BasicType type); 307 address generate_slow_signature_handler(); 308 309 // entry point generator 310 address generate_method_entry(AbstractInterpreter::MethodKind kind); 311 312 void bang_stack_shadow_pages(bool native_call); 313 314 void generate_all(); 315 void initialize_method_handle_entries(); 316 317 public: 318 AbstractInterpreterGenerator(StubQueue* _code); 319 }; 320 321 #endif // SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP