methodHandles.hpp revision 1426:2338d41fbd81
1/* 2 * Copyright 2008-2010 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25class MacroAssembler; 26class Label; 27class MethodHandleEntry; 28 29class MethodHandles: AllStatic { 30 // JVM support for MethodHandle, MethodType, and related types 31 // in java.dyn and java.dyn.hotspot. 32 // See also javaClasses for layouts java_dyn_Method{Handle,Type,Type::Form}. 33 public: 34 enum EntryKind { 35 _raise_exception, // stub for error generation from other stubs 36 _invokestatic_mh, // how a MH emulates invokestatic 37 _invokespecial_mh, // ditto for the other invokes... 38 _invokevirtual_mh, 39 _invokeinterface_mh, 40 _bound_ref_mh, // reference argument is bound 41 _bound_int_mh, // int argument is bound (via an Integer or Float) 42 _bound_long_mh, // long argument is bound (via a Long or Double) 43 _bound_ref_direct_mh, // same as above, with direct linkage to methodOop 44 _bound_int_direct_mh, 45 _bound_long_direct_mh, 46 47 _adapter_mh_first, // adapter sequence goes here... 48 _adapter_retype_only = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_RETYPE_ONLY, 49 _adapter_retype_raw = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW, 50 _adapter_check_cast = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_CHECK_CAST, 51 _adapter_prim_to_prim = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_PRIM_TO_PRIM, 52 _adapter_ref_to_prim = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_REF_TO_PRIM, 53 _adapter_prim_to_ref = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_PRIM_TO_REF, 54 _adapter_swap_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_SWAP_ARGS, 55 _adapter_rot_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_ROT_ARGS, 56 _adapter_dup_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_DUP_ARGS, 57 _adapter_drop_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_DROP_ARGS, 58 _adapter_collect_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_COLLECT_ARGS, 59 _adapter_spread_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_SPREAD_ARGS, 60 _adapter_flyby = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_FLYBY, 61 _adapter_ricochet = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_RICOCHET, 62 _adapter_mh_last = _adapter_mh_first + sun_dyn_AdapterMethodHandle::CONV_OP_LIMIT - 1, 63 64 // Optimized adapter types 65 66 // argument list reordering 67 _adapter_opt_swap_1, 68 _adapter_opt_swap_2, 69 _adapter_opt_rot_1_up, 70 _adapter_opt_rot_1_down, 71 _adapter_opt_rot_2_up, 72 _adapter_opt_rot_2_down, 73 // primitive single to single: 74 _adapter_opt_i2i, // i2c, i2z, i2b, i2s 75 // primitive double to single: 76 _adapter_opt_l2i, 77 _adapter_opt_d2f, 78 // primitive single to double: 79 _adapter_opt_i2l, 80 _adapter_opt_f2d, 81 // conversion between floating point and integer type is handled by Java 82 83 // reference to primitive: 84 _adapter_opt_unboxi, 85 _adapter_opt_unboxl, 86 87 // spreading (array length cases 0, 1, >=2) 88 _adapter_opt_spread_0, 89 _adapter_opt_spread_1, 90 _adapter_opt_spread_more, 91 92 _EK_LIMIT, 93 _EK_FIRST = 0 94 }; 95 96 public: 97 static bool enabled() { return _enabled; } 98 static void set_enabled(bool z); 99 100 private: 101 enum { // import sun_dyn_AdapterMethodHandle::CONV_OP_* 102 CONV_OP_LIMIT = sun_dyn_AdapterMethodHandle::CONV_OP_LIMIT, 103 CONV_OP_MASK = sun_dyn_AdapterMethodHandle::CONV_OP_MASK, 104 CONV_VMINFO_MASK = sun_dyn_AdapterMethodHandle::CONV_VMINFO_MASK, 105 CONV_VMINFO_SHIFT = sun_dyn_AdapterMethodHandle::CONV_VMINFO_SHIFT, 106 CONV_OP_SHIFT = sun_dyn_AdapterMethodHandle::CONV_OP_SHIFT, 107 CONV_DEST_TYPE_SHIFT = sun_dyn_AdapterMethodHandle::CONV_DEST_TYPE_SHIFT, 108 CONV_SRC_TYPE_SHIFT = sun_dyn_AdapterMethodHandle::CONV_SRC_TYPE_SHIFT, 109 CONV_STACK_MOVE_SHIFT = sun_dyn_AdapterMethodHandle::CONV_STACK_MOVE_SHIFT, 110 CONV_STACK_MOVE_MASK = sun_dyn_AdapterMethodHandle::CONV_STACK_MOVE_MASK 111 }; 112 113 static bool _enabled; 114 static MethodHandleEntry* _entries[_EK_LIMIT]; 115 static const char* _entry_names[_EK_LIMIT+1]; 116 static jobject _raise_exception_method; 117 118 // Adapters. 119 static MethodHandlesAdapterBlob* _adapter_code; 120 static int _adapter_code_size; 121 122 static bool ek_valid(EntryKind ek) { return (uint)ek < (uint)_EK_LIMIT; } 123 static bool conv_op_valid(int op) { return (uint)op < (uint)CONV_OP_LIMIT; } 124 125 public: 126 static bool have_entry(EntryKind ek) { return ek_valid(ek) && _entries[ek] != NULL; } 127 static MethodHandleEntry* entry(EntryKind ek) { assert(ek_valid(ek), "initialized"); 128 return _entries[ek]; } 129 static const char* entry_name(EntryKind ek) { assert(ek_valid(ek), "oob"); 130 return _entry_names[ek]; } 131 static EntryKind adapter_entry_kind(int op) { assert(conv_op_valid(op), "oob"); 132 return EntryKind(_adapter_mh_first + op); } 133 134 static void init_entry(EntryKind ek, MethodHandleEntry* me) { 135 assert(ek_valid(ek), "oob"); 136 assert(_entries[ek] == NULL, "no double initialization"); 137 _entries[ek] = me; 138 } 139 140 // Some adapter helper functions. 141 static void get_ek_bound_mh_info(EntryKind ek, BasicType& arg_type, int& arg_mask, int& arg_slots) { 142 switch (ek) { 143 case _bound_int_mh : // fall-thru 144 case _bound_int_direct_mh : arg_type = T_INT; arg_mask = _INSERT_INT_MASK; break; 145 case _bound_long_mh : // fall-thru 146 case _bound_long_direct_mh: arg_type = T_LONG; arg_mask = _INSERT_LONG_MASK; break; 147 case _bound_ref_mh : // fall-thru 148 case _bound_ref_direct_mh : arg_type = T_OBJECT; arg_mask = _INSERT_REF_MASK; break; 149 default: ShouldNotReachHere(); 150 } 151 arg_slots = type2size[arg_type]; 152 } 153 154 static void get_ek_adapter_opt_swap_rot_info(EntryKind ek, int& swap_bytes, int& rotate) { 155 int swap_slots = 0; 156 switch (ek) { 157 case _adapter_opt_swap_1: swap_slots = 1; rotate = 0; break; 158 case _adapter_opt_swap_2: swap_slots = 2; rotate = 0; break; 159 case _adapter_opt_rot_1_up: swap_slots = 1; rotate = 1; break; 160 case _adapter_opt_rot_1_down: swap_slots = 1; rotate = -1; break; 161 case _adapter_opt_rot_2_up: swap_slots = 2; rotate = 1; break; 162 case _adapter_opt_rot_2_down: swap_slots = 2; rotate = -1; break; 163 default: ShouldNotReachHere(); 164 } 165 // Return the size of the stack slots to move in bytes. 166 swap_bytes = swap_slots * Interpreter::stackElementSize; 167 } 168 169 static int get_ek_adapter_opt_spread_info(EntryKind ek) { 170 switch (ek) { 171 case _adapter_opt_spread_0: return 0; 172 case _adapter_opt_spread_1: return 1; 173 default : return -1; 174 } 175 } 176 177 static methodOop raise_exception_method() { 178 oop rem = JNIHandles::resolve(_raise_exception_method); 179 assert(rem == NULL || rem->is_method(), ""); 180 return (methodOop) rem; 181 } 182 static void set_raise_exception_method(methodOop rem) { 183 assert(_raise_exception_method == NULL, ""); 184 _raise_exception_method = JNIHandles::make_global(Handle(rem)); 185 } 186 187 static jint adapter_conversion(int conv_op, BasicType src, BasicType dest, 188 int stack_move = 0, int vminfo = 0) { 189 assert(conv_op_valid(conv_op), "oob"); 190 jint conv = ((conv_op << CONV_OP_SHIFT) 191 | (src << CONV_SRC_TYPE_SHIFT) 192 | (dest << CONV_DEST_TYPE_SHIFT) 193 | (stack_move << CONV_STACK_MOVE_SHIFT) 194 | (vminfo << CONV_VMINFO_SHIFT) 195 ); 196 assert(adapter_conversion_op(conv) == conv_op, "decode conv_op"); 197 assert(adapter_conversion_src_type(conv) == src, "decode src"); 198 assert(adapter_conversion_dest_type(conv) == dest, "decode dest"); 199 assert(adapter_conversion_stack_move(conv) == stack_move, "decode stack_move"); 200 assert(adapter_conversion_vminfo(conv) == vminfo, "decode vminfo"); 201 return conv; 202 } 203 static int adapter_conversion_op(jint conv) { 204 return ((conv >> CONV_OP_SHIFT) & 0xF); 205 } 206 static BasicType adapter_conversion_src_type(jint conv) { 207 return (BasicType)((conv >> CONV_SRC_TYPE_SHIFT) & 0xF); 208 } 209 static BasicType adapter_conversion_dest_type(jint conv) { 210 return (BasicType)((conv >> CONV_DEST_TYPE_SHIFT) & 0xF); 211 } 212 static int adapter_conversion_stack_move(jint conv) { 213 return (conv >> CONV_STACK_MOVE_SHIFT); 214 } 215 static int adapter_conversion_vminfo(jint conv) { 216 return (conv >> CONV_VMINFO_SHIFT) & CONV_VMINFO_MASK; 217 } 218 219 // Offset in words that the interpreter stack pointer moves when an argument is pushed. 220 // The stack_move value must always be a multiple of this. 221 static int stack_move_unit() { 222 return frame::interpreter_frame_expression_stack_direction() * Interpreter::stackElementWords; 223 } 224 225 enum { CONV_VMINFO_SIGN_FLAG = 0x80 }; 226 static int adapter_subword_vminfo(BasicType dest) { 227 if (dest == T_BOOLEAN) return (BitsPerInt - 1); 228 if (dest == T_CHAR) return (BitsPerInt - 16); 229 if (dest == T_BYTE) return (BitsPerInt - 8) | CONV_VMINFO_SIGN_FLAG; 230 if (dest == T_SHORT) return (BitsPerInt - 16) | CONV_VMINFO_SIGN_FLAG; 231 return 0; // case T_INT 232 } 233 // Here is the transformation the i2i adapter must perform: 234 static int truncate_subword_from_vminfo(jint value, int vminfo) { 235 jint tem = value << vminfo; 236 if ((vminfo & CONV_VMINFO_SIGN_FLAG) != 0) { 237 return (jint)tem >> vminfo; 238 } else { 239 return (juint)tem >> vminfo; 240 } 241 } 242 243 static inline address from_compiled_entry(EntryKind ek); 244 static inline address from_interpreted_entry(EntryKind ek); 245 246 // helpers for decode_method. 247 static methodOop decode_methodOop(methodOop m, int& decode_flags_result); 248 static methodOop decode_vmtarget(oop vmtarget, int vmindex, oop mtype, klassOop& receiver_limit_result, int& decode_flags_result); 249 static methodOop decode_MemberName(oop mname, klassOop& receiver_limit_result, int& decode_flags_result); 250 static methodOop decode_MethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); 251 static methodOop decode_DirectMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); 252 static methodOop decode_BoundMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); 253 static methodOop decode_AdapterMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); 254 255 // Find out how many stack slots an mh pushes or pops. 256 // The result is *not* reported as a multiple of stack_move_unit(); 257 // It is a signed net number of pushes (a difference in vmslots). 258 // To compare with a stack_move value, first multiply by stack_move_unit(). 259 static int decode_MethodHandle_stack_pushes(oop mh); 260 261 public: 262 // working with member names 263 static void resolve_MemberName(Handle mname, TRAPS); // compute vmtarget/vmindex from name/type 264 static void expand_MemberName(Handle mname, int suppress, TRAPS); // expand defc/name/type if missing 265 static void init_MemberName(oop mname_oop, oop target); // compute vmtarget/vmindex from target 266 static void init_MemberName(oop mname_oop, methodOop m, bool do_dispatch); 267 static void init_MemberName(oop mname_oop, klassOop field_holder, AccessFlags mods, int offset); 268 static int find_MemberNames(klassOop k, symbolOop name, symbolOop sig, 269 int mflags, klassOop caller, 270 int skip, objArrayOop results); 271 // bit values for suppress argument to expand_MemberName: 272 enum { _suppress_defc = 1, _suppress_name = 2, _suppress_type = 4 }; 273 274 // Generate MethodHandles adapters. 275 static void generate_adapters(); 276 277 // Called from InterpreterGenerator and MethodHandlesAdapterGenerator. 278 static address generate_method_handle_interpreter_entry(MacroAssembler* _masm); 279 static void generate_method_handle_stub(MacroAssembler* _masm, EntryKind ek); 280 281 // argument list parsing 282 static int argument_slot(oop method_type, int arg); 283 static int argument_slot_count(oop method_type) { return argument_slot(method_type, -1); } 284 static int argument_slot_to_argnum(oop method_type, int argslot); 285 286 // Runtime support 287 enum { // bit-encoded flags from decode_method or decode_vmref 288 _dmf_has_receiver = 0x01, // target method has leading reference argument 289 _dmf_does_dispatch = 0x02, // method handle performs virtual or interface dispatch 290 _dmf_from_interface = 0x04, // peforms interface dispatch 291 _DMF_DIRECT_MASK = (_dmf_from_interface*2 - _dmf_has_receiver), 292 _dmf_binds_method = 0x08, 293 _dmf_binds_argument = 0x10, 294 _DMF_BOUND_MASK = (_dmf_binds_argument*2 - _dmf_binds_method), 295 _dmf_adapter_lsb = 0x20, 296 _DMF_ADAPTER_MASK = (_dmf_adapter_lsb << CONV_OP_LIMIT) - _dmf_adapter_lsb 297 }; 298 static methodOop decode_method(oop x, klassOop& receiver_limit_result, int& decode_flags_result); 299 enum { 300 // format of query to getConstant: 301 GC_JVM_PUSH_LIMIT = 0, 302 GC_JVM_STACK_MOVE_UNIT = 1, 303 304 // format of result from getTarget / encode_target: 305 ETF_HANDLE_OR_METHOD_NAME = 0, // all available data (immediate MH or method) 306 ETF_DIRECT_HANDLE = 1, // ultimate method handle (will be a DMH, may be self) 307 ETF_METHOD_NAME = 2, // ultimate method as MemberName 308 ETF_REFLECT_METHOD = 3 // ultimate method as java.lang.reflect object (sans refClass) 309 }; 310 static int get_named_constant(int which, Handle name_box, TRAPS); 311 static oop encode_target(Handle mh, int format, TRAPS); // report vmtarget (to Java code) 312 static bool class_cast_needed(klassOop src, klassOop dst); 313 314 private: 315 // These checkers operate on a pair of whole MethodTypes: 316 static const char* check_method_type_change(oop src_mtype, int src_beg, int src_end, 317 int insert_argnum, oop insert_type, 318 int change_argnum, oop change_type, 319 int delete_argnum, 320 oop dst_mtype, int dst_beg, int dst_end, 321 bool raw = false); 322 static const char* check_method_type_insertion(oop src_mtype, 323 int insert_argnum, oop insert_type, 324 oop dst_mtype) { 325 oop no_ref = NULL; 326 return check_method_type_change(src_mtype, 0, -1, 327 insert_argnum, insert_type, 328 -1, no_ref, -1, dst_mtype, 0, -1); 329 } 330 static const char* check_method_type_conversion(oop src_mtype, 331 int change_argnum, oop change_type, 332 oop dst_mtype) { 333 oop no_ref = NULL; 334 return check_method_type_change(src_mtype, 0, -1, -1, no_ref, 335 change_argnum, change_type, 336 -1, dst_mtype, 0, -1); 337 } 338 static const char* check_method_type_passthrough(oop src_mtype, oop dst_mtype, bool raw) { 339 oop no_ref = NULL; 340 return check_method_type_change(src_mtype, 0, -1, 341 -1, no_ref, -1, no_ref, -1, 342 dst_mtype, 0, -1, raw); 343 } 344 345 // These checkers operate on pairs of argument or return types: 346 static const char* check_argument_type_change(BasicType src_type, klassOop src_klass, 347 BasicType dst_type, klassOop dst_klass, 348 int argnum, bool raw = false); 349 350 static const char* check_argument_type_change(oop src_type, oop dst_type, 351 int argnum, bool raw = false) { 352 klassOop src_klass = NULL, dst_klass = NULL; 353 BasicType src_bt = java_lang_Class::as_BasicType(src_type, &src_klass); 354 BasicType dst_bt = java_lang_Class::as_BasicType(dst_type, &dst_klass); 355 return check_argument_type_change(src_bt, src_klass, 356 dst_bt, dst_klass, argnum, raw); 357 } 358 359 static const char* check_return_type_change(oop src_type, oop dst_type, bool raw = false) { 360 return check_argument_type_change(src_type, dst_type, -1, raw); 361 } 362 363 static const char* check_return_type_change(BasicType src_type, klassOop src_klass, 364 BasicType dst_type, klassOop dst_klass) { 365 return check_argument_type_change(src_type, src_klass, dst_type, dst_klass, -1); 366 } 367 368 static const char* check_method_receiver(methodOop m, klassOop passed_recv_type); 369 370 // These verifiers can block, and will throw an error if the checking fails: 371 static void verify_vmslots(Handle mh, TRAPS); 372 static void verify_vmargslot(Handle mh, int argnum, int argslot, TRAPS); 373 374 static void verify_method_type(methodHandle m, Handle mtype, 375 bool has_bound_oop, 376 KlassHandle bound_oop_type, 377 TRAPS); 378 379 static void verify_method_signature(methodHandle m, Handle mtype, 380 int first_ptype_pos, 381 KlassHandle insert_ptype, TRAPS); 382 383 static void verify_DirectMethodHandle(Handle mh, methodHandle m, TRAPS); 384 static void verify_BoundMethodHandle(Handle mh, Handle target, int argnum, 385 bool direct_to_method, TRAPS); 386 static void verify_BoundMethodHandle_with_receiver(Handle mh, methodHandle m, TRAPS); 387 static void verify_AdapterMethodHandle(Handle mh, int argnum, TRAPS); 388 389 public: 390 391 // Fill in the fields of a DirectMethodHandle mh. (MH.type must be pre-filled.) 392 static void init_DirectMethodHandle(Handle mh, methodHandle method, bool do_dispatch, TRAPS); 393 394 // Fill in the fields of a BoundMethodHandle mh. (MH.type, BMH.argument must be pre-filled.) 395 static void init_BoundMethodHandle(Handle mh, Handle target, int argnum, TRAPS); 396 static void init_BoundMethodHandle_with_receiver(Handle mh, 397 methodHandle original_m, 398 KlassHandle receiver_limit, 399 int decode_flags, 400 TRAPS); 401 402 // Fill in the fields of an AdapterMethodHandle mh. (MH.type must be pre-filled.) 403 static void init_AdapterMethodHandle(Handle mh, Handle target, int argnum, TRAPS); 404 405#ifdef ASSERT 406 static bool spot_check_entry_names(); 407#endif 408 409 private: 410 static methodHandle dispatch_decoded_method(methodHandle m, 411 KlassHandle receiver_limit, 412 int decode_flags, 413 KlassHandle receiver_klass, 414 TRAPS); 415 416 static bool same_basic_type_for_arguments(BasicType src, BasicType dst, 417 bool raw = false, 418 bool for_return = false); 419 static bool same_basic_type_for_returns(BasicType src, BasicType dst, bool raw = false) { 420 return same_basic_type_for_arguments(src, dst, raw, true); 421 } 422 423 enum { // arg_mask values 424 _INSERT_NO_MASK = -1, 425 _INSERT_REF_MASK = 0, 426 _INSERT_INT_MASK = 1, 427 _INSERT_LONG_MASK = 3 428 }; 429 static void insert_arg_slots(MacroAssembler* _masm, 430 RegisterOrConstant arg_slots, 431 int arg_mask, 432 Register argslot_reg, 433 Register temp_reg, Register temp2_reg, Register temp3_reg = noreg); 434 435 static void remove_arg_slots(MacroAssembler* _masm, 436 RegisterOrConstant arg_slots, 437 Register argslot_reg, 438 Register temp_reg, Register temp2_reg, Register temp3_reg = noreg); 439}; 440 441 442// Access methods for the "entry" field of a java.dyn.MethodHandle. 443// The field is primarily a jump target for compiled calls. 444// However, we squirrel away some nice pointers for other uses, 445// just before the jump target. 446// Aspects of a method handle entry: 447// - from_compiled_entry - stub used when compiled code calls the MH 448// - from_interpreted_entry - stub used when the interpreter calls the MH 449// - type_checking_entry - stub for runtime casting between MHForm siblings (NYI) 450class MethodHandleEntry { 451 public: 452 class Data { 453 friend class MethodHandleEntry; 454 size_t _total_size; // size including Data and code stub 455 MethodHandleEntry* _type_checking_entry; 456 address _from_interpreted_entry; 457 MethodHandleEntry* method_entry() { return (MethodHandleEntry*)(this + 1); } 458 }; 459 460 Data* data() { return (Data*)this - 1; } 461 462 address start_address() { return (address) data(); } 463 address end_address() { return start_address() + data()->_total_size; } 464 465 address from_compiled_entry() { return (address) this; } 466 467 address from_interpreted_entry() { return data()->_from_interpreted_entry; } 468 void set_from_interpreted_entry(address e) { data()->_from_interpreted_entry = e; } 469 470 MethodHandleEntry* type_checking_entry() { return data()->_type_checking_entry; } 471 void set_type_checking_entry(MethodHandleEntry* e) { data()->_type_checking_entry = e; } 472 473 void set_end_address(address end_addr) { 474 size_t total_size = end_addr - start_address(); 475 assert(total_size > 0 && total_size < 0x1000, "reasonable end address"); 476 data()->_total_size = total_size; 477 } 478 479 // Compiler support: 480 static int from_interpreted_entry_offset_in_bytes() { 481 return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); 482 } 483 static int type_checking_entry_offset_in_bytes() { 484 return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); 485 } 486 487 static address start_compiled_entry(MacroAssembler* _masm, 488 address interpreted_entry = NULL); 489 static MethodHandleEntry* finish_compiled_entry(MacroAssembler* masm, address start_addr); 490}; 491 492address MethodHandles::from_compiled_entry(EntryKind ek) { return entry(ek)->from_compiled_entry(); } 493address MethodHandles::from_interpreted_entry(EntryKind ek) { return entry(ek)->from_interpreted_entry(); } 494 495 496//------------------------------------------------------------------------------ 497// MethodHandlesAdapterGenerator 498// 499class MethodHandlesAdapterGenerator : public StubCodeGenerator { 500public: 501 MethodHandlesAdapterGenerator(CodeBuffer* code) : StubCodeGenerator(code) {} 502 503 void generate(); 504}; 505