1 /* 2 * Copyright (c) 2008, 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_PRIMS_METHODHANDLES_HPP 26 #define SHARE_VM_PRIMS_METHODHANDLES_HPP 27 28 #include "classfile/javaClasses.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "runtime/frame.inline.hpp" 31 #include "runtime/globals.hpp" 32 #include "runtime/interfaceSupport.hpp" 33 34 class MacroAssembler; 35 class Label; 36 class MethodHandleEntry; 37 38 class MethodHandles: AllStatic { 39 // JVM support for MethodHandle, MethodType, and related types 40 // in java.lang.invoke and sun.invoke. 41 // See also javaClasses for layouts java_lang_invoke_Method{Handle,Type,Type::Form}. 42 public: 43 enum EntryKind { 44 _raise_exception, // stub for error generation from other stubs 45 _invokestatic_mh, // how a MH emulates invokestatic 46 _invokespecial_mh, // ditto for the other invokes... 47 _invokevirtual_mh, 48 _invokeinterface_mh, 49 _bound_ref_mh, // reference argument is bound 50 _bound_int_mh, // int argument is bound (via an Integer or Float) 51 _bound_long_mh, // long argument is bound (via a Long or Double) 52 _bound_ref_direct_mh, // same as above, with direct linkage to methodOop 53 _bound_int_direct_mh, 54 _bound_long_direct_mh, 55 56 _adapter_mh_first, // adapter sequence goes here... 57 _adapter_retype_only = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY, 58 _adapter_retype_raw = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW, 59 _adapter_check_cast = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST, 60 _adapter_prim_to_prim = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM, 61 _adapter_ref_to_prim = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM, 62 _adapter_prim_to_ref = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF, 63 _adapter_swap_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS, 64 _adapter_rot_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS, 65 _adapter_dup_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS, 66 _adapter_drop_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS, 67 _adapter_collect_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS, 68 _adapter_spread_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS, 69 _adapter_fold_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS, 70 _adapter_unused_13 = _adapter_mh_first + 13, //hole in the CONV_OP enumeration 71 _adapter_mh_last = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::CONV_OP_LIMIT - 1, 72 73 // Optimized adapter types 74 75 // argument list reordering 76 _adapter_opt_swap_1, 77 _adapter_opt_swap_2, 78 _adapter_opt_rot_1_up, 79 _adapter_opt_rot_1_down, 80 _adapter_opt_rot_2_up, 81 _adapter_opt_rot_2_down, 82 // primitive single to single: 83 _adapter_opt_i2i, // i2c, i2z, i2b, i2s 84 // primitive double to single: 85 _adapter_opt_l2i, 86 _adapter_opt_d2f, 87 // primitive single to double: 88 _adapter_opt_i2l, 89 _adapter_opt_f2d, 90 // conversion between floating point and integer type is handled by Java 91 92 // reference to primitive: 93 _adapter_opt_unboxi, 94 _adapter_opt_unboxl, 95 96 // %% Maybe tame the following with a VM_SYMBOLS_DO type macro? 97 98 // how a blocking adapter returns (platform-dependent) 99 _adapter_opt_return_ref, 100 _adapter_opt_return_int, 101 _adapter_opt_return_long, 102 _adapter_opt_return_float, 103 _adapter_opt_return_double, 104 _adapter_opt_return_void, 105 _adapter_opt_return_S0_ref, // return ref to S=0 (last slot) 106 _adapter_opt_return_S1_ref, // return ref to S=1 (2nd-to-last slot) 107 _adapter_opt_return_S2_ref, 108 _adapter_opt_return_S3_ref, 109 _adapter_opt_return_S4_ref, 110 _adapter_opt_return_S5_ref, 111 _adapter_opt_return_any, // dynamically select r/i/l/f/d 112 _adapter_opt_return_FIRST = _adapter_opt_return_ref, 113 _adapter_opt_return_LAST = _adapter_opt_return_any, 114 115 // spreading (array length cases 0, 1, ...) 116 _adapter_opt_spread_0, // spread empty array to N=0 arguments 117 _adapter_opt_spread_1_ref, // spread Object[] to N=1 argument 118 _adapter_opt_spread_2_ref, // spread Object[] to N=2 arguments 119 _adapter_opt_spread_3_ref, // spread Object[] to N=3 arguments 120 _adapter_opt_spread_4_ref, // spread Object[] to N=4 arguments 121 _adapter_opt_spread_5_ref, // spread Object[] to N=5 arguments 122 _adapter_opt_spread_ref, // spread Object[] to N arguments 123 _adapter_opt_spread_byte, // spread byte[] or boolean[] to N arguments 124 _adapter_opt_spread_char, // spread char[], etc., to N arguments 125 _adapter_opt_spread_short, // spread short[], etc., to N arguments 126 _adapter_opt_spread_int, // spread int[], short[], etc., to N arguments 127 _adapter_opt_spread_long, // spread long[] to N arguments 128 _adapter_opt_spread_float, // spread float[] to N arguments 129 _adapter_opt_spread_double, // spread double[] to N arguments 130 _adapter_opt_spread_FIRST = _adapter_opt_spread_0, 131 _adapter_opt_spread_LAST = _adapter_opt_spread_double, 132 133 // blocking filter/collect conversions 134 // These collect N arguments and replace them (at slot S) by a return value 135 // which is passed to the final target, along with the unaffected arguments. 136 // collect_{N}_{T} collects N arguments at any position into a T value 137 // collect_{N}_S{S}_{T} collects N arguments at slot S into a T value 138 // collect_{T} collects any number of arguments at any position 139 // filter_S{S}_{T} is the same as collect_1_S{S}_{T} (a unary collection) 140 // (collect_2 is also usable as a filter, with long or double arguments) 141 _adapter_opt_collect_ref, // combine N arguments, replace with a reference 142 _adapter_opt_collect_int, // combine N arguments, replace with an int, short, etc. 143 _adapter_opt_collect_long, // combine N arguments, replace with a long 144 _adapter_opt_collect_float, // combine N arguments, replace with a float 145 _adapter_opt_collect_double, // combine N arguments, replace with a double 146 _adapter_opt_collect_void, // combine N arguments, replace with nothing 147 // if there is a small fixed number to push, do so without a loop: 148 _adapter_opt_collect_0_ref, // collect N=0 arguments, insert a reference 149 _adapter_opt_collect_1_ref, // collect N=1 argument, replace with a reference 150 _adapter_opt_collect_2_ref, // combine N=2 arguments, replace with a reference 151 _adapter_opt_collect_3_ref, // combine N=3 arguments, replace with a reference 152 _adapter_opt_collect_4_ref, // combine N=4 arguments, replace with a reference 153 _adapter_opt_collect_5_ref, // combine N=5 arguments, replace with a reference 154 // filters are an important special case because they never move arguments: 155 _adapter_opt_filter_S0_ref, // filter N=1 argument at S=0, replace with a reference 156 _adapter_opt_filter_S1_ref, // filter N=1 argument at S=1, replace with a reference 157 _adapter_opt_filter_S2_ref, // filter N=1 argument at S=2, replace with a reference 158 _adapter_opt_filter_S3_ref, // filter N=1 argument at S=3, replace with a reference 159 _adapter_opt_filter_S4_ref, // filter N=1 argument at S=4, replace with a reference 160 _adapter_opt_filter_S5_ref, // filter N=1 argument at S=5, replace with a reference 161 // these move arguments, but they are important for boxing 162 _adapter_opt_collect_2_S0_ref, // combine last N=2 arguments, replace with a reference 163 _adapter_opt_collect_2_S1_ref, // combine N=2 arguments at S=1, replace with a reference 164 _adapter_opt_collect_2_S2_ref, // combine N=2 arguments at S=2, replace with a reference 165 _adapter_opt_collect_2_S3_ref, // combine N=2 arguments at S=3, replace with a reference 166 _adapter_opt_collect_2_S4_ref, // combine N=2 arguments at S=4, replace with a reference 167 _adapter_opt_collect_2_S5_ref, // combine N=2 arguments at S=5, replace with a reference 168 _adapter_opt_collect_FIRST = _adapter_opt_collect_ref, 169 _adapter_opt_collect_LAST = _adapter_opt_collect_2_S5_ref, 170 171 // blocking folding conversions 172 // these are like collects, but retain all the N arguments for the final target 173 //_adapter_opt_fold_0_ref, // same as _adapter_opt_collect_0_ref 174 // fold_{N}_{T} processes N arguments at any position into a T value, which it inserts 175 // fold_{T} processes any number of arguments at any position 176 _adapter_opt_fold_ref, // process N arguments, prepend a reference 177 _adapter_opt_fold_int, // process N arguments, prepend an int, short, etc. 178 _adapter_opt_fold_long, // process N arguments, prepend a long 179 _adapter_opt_fold_float, // process N arguments, prepend a float 180 _adapter_opt_fold_double, // process N arguments, prepend a double 181 _adapter_opt_fold_void, // process N arguments, but leave the list unchanged 182 _adapter_opt_fold_1_ref, // process N=1 argument, prepend a reference 183 _adapter_opt_fold_2_ref, // process N=2 arguments, prepend a reference 184 _adapter_opt_fold_3_ref, // process N=3 arguments, prepend a reference 185 _adapter_opt_fold_4_ref, // process N=4 arguments, prepend a reference 186 _adapter_opt_fold_5_ref, // process N=5 arguments, prepend a reference 187 _adapter_opt_fold_FIRST = _adapter_opt_fold_ref, 188 _adapter_opt_fold_LAST = _adapter_opt_fold_5_ref, 189 190 _EK_LIMIT, 191 _EK_FIRST = 0 192 }; 193 194 public: 195 static bool enabled() { return _enabled; } 196 static void set_enabled(bool z); 197 198 private: 199 enum { // import java_lang_invoke_AdapterMethodHandle::CONV_OP_* 200 CONV_OP_LIMIT = java_lang_invoke_AdapterMethodHandle::CONV_OP_LIMIT, 201 CONV_OP_MASK = java_lang_invoke_AdapterMethodHandle::CONV_OP_MASK, 202 CONV_TYPE_MASK = java_lang_invoke_AdapterMethodHandle::CONV_TYPE_MASK, 203 CONV_VMINFO_MASK = java_lang_invoke_AdapterMethodHandle::CONV_VMINFO_MASK, 204 CONV_VMINFO_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_VMINFO_SHIFT, 205 CONV_OP_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_OP_SHIFT, 206 CONV_DEST_TYPE_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_DEST_TYPE_SHIFT, 207 CONV_SRC_TYPE_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_SRC_TYPE_SHIFT, 208 CONV_STACK_MOVE_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_STACK_MOVE_SHIFT, 209 CONV_STACK_MOVE_MASK = java_lang_invoke_AdapterMethodHandle::CONV_STACK_MOVE_MASK 210 }; 211 212 static bool _enabled; 213 static MethodHandleEntry* _entries[_EK_LIMIT]; 214 static const char* _entry_names[_EK_LIMIT+1]; 215 static jobject _raise_exception_method; 216 static address _adapter_return_handlers[CONV_TYPE_MASK+1]; 217 218 // Adapters. 219 static MethodHandlesAdapterBlob* _adapter_code; 220 static int _adapter_code_size; 221 222 static bool ek_valid(EntryKind ek) { return (uint)ek < (uint)_EK_LIMIT; } 223 static bool conv_op_valid(int op) { return (uint)op < (uint)CONV_OP_LIMIT; } 224 225 public: 226 static bool have_entry(EntryKind ek) { return ek_valid(ek) && _entries[ek] != NULL; } 227 static MethodHandleEntry* entry(EntryKind ek) { assert(ek_valid(ek), "initialized"); 228 return _entries[ek]; } 229 static const char* entry_name(EntryKind ek) { assert(ek_valid(ek), "oob"); 230 return _entry_names[ek]; } 231 static EntryKind adapter_entry_kind(int op) { assert(conv_op_valid(op), "oob"); 232 return EntryKind(_adapter_mh_first + op); } 233 234 static void init_entry(EntryKind ek, MethodHandleEntry* me) { 235 assert(ek_valid(ek), "oob"); 236 assert(_entries[ek] == NULL, "no double initialization"); 237 _entries[ek] = me; 238 } 239 240 // Some adapter helper functions. 241 static EntryKind ek_original_kind(EntryKind ek) { 242 if (ek <= _adapter_mh_last) return ek; 243 switch (ek) { 244 case _adapter_opt_swap_1: 245 case _adapter_opt_swap_2: 246 return _adapter_swap_args; 247 case _adapter_opt_rot_1_up: 248 case _adapter_opt_rot_1_down: 249 case _adapter_opt_rot_2_up: 250 case _adapter_opt_rot_2_down: 251 return _adapter_rot_args; 252 case _adapter_opt_i2i: 253 case _adapter_opt_l2i: 254 case _adapter_opt_d2f: 255 case _adapter_opt_i2l: 256 case _adapter_opt_f2d: 257 return _adapter_prim_to_prim; 258 case _adapter_opt_unboxi: 259 case _adapter_opt_unboxl: 260 return _adapter_ref_to_prim; 261 } 262 if (ek >= _adapter_opt_spread_FIRST && ek <= _adapter_opt_spread_LAST) 263 return _adapter_spread_args; 264 if (ek >= _adapter_opt_collect_FIRST && ek <= _adapter_opt_collect_LAST) 265 return _adapter_collect_args; 266 if (ek >= _adapter_opt_fold_FIRST && ek <= _adapter_opt_fold_LAST) 267 return _adapter_fold_args; 268 if (ek >= _adapter_opt_return_FIRST && ek <= _adapter_opt_return_LAST) 269 return _adapter_opt_return_any; 270 assert(false, "oob"); 271 return _EK_LIMIT; 272 } 273 274 static bool ek_supported(MethodHandles::EntryKind ek); 275 276 static BasicType ek_bound_mh_arg_type(EntryKind ek) { 277 switch (ek) { 278 case _bound_int_mh : // fall-thru 279 case _bound_int_direct_mh : return T_INT; 280 case _bound_long_mh : // fall-thru 281 case _bound_long_direct_mh : return T_LONG; 282 default : return T_OBJECT; 283 } 284 } 285 286 static int ek_adapter_opt_swap_slots(EntryKind ek) { 287 switch (ek) { 288 case _adapter_opt_swap_1 : return 1; 289 case _adapter_opt_swap_2 : return 2; 290 case _adapter_opt_rot_1_up : return 1; 291 case _adapter_opt_rot_1_down : return 1; 292 case _adapter_opt_rot_2_up : return 2; 293 case _adapter_opt_rot_2_down : return 2; 294 default : ShouldNotReachHere(); return -1; 295 } 296 } 297 298 static int ek_adapter_opt_swap_mode(EntryKind ek) { 299 switch (ek) { 300 case _adapter_opt_swap_1 : return 0; 301 case _adapter_opt_swap_2 : return 0; 302 case _adapter_opt_rot_1_up : return 1; 303 case _adapter_opt_rot_1_down : return -1; 304 case _adapter_opt_rot_2_up : return 1; 305 case _adapter_opt_rot_2_down : return -1; 306 default : ShouldNotReachHere(); return 0; 307 } 308 } 309 310 static int ek_adapter_opt_collect_count(EntryKind ek) { 311 assert(ek >= _adapter_opt_collect_FIRST && ek <= _adapter_opt_collect_LAST || 312 ek >= _adapter_opt_fold_FIRST && ek <= _adapter_opt_fold_LAST, ""); 313 switch (ek) { 314 case _adapter_opt_collect_0_ref : return 0; 315 case _adapter_opt_filter_S0_ref : 316 case _adapter_opt_filter_S1_ref : 317 case _adapter_opt_filter_S2_ref : 318 case _adapter_opt_filter_S3_ref : 319 case _adapter_opt_filter_S4_ref : 320 case _adapter_opt_filter_S5_ref : 321 case _adapter_opt_fold_1_ref : 322 case _adapter_opt_collect_1_ref : return 1; 323 case _adapter_opt_collect_2_S0_ref : 324 case _adapter_opt_collect_2_S1_ref : 325 case _adapter_opt_collect_2_S2_ref : 326 case _adapter_opt_collect_2_S3_ref : 327 case _adapter_opt_collect_2_S4_ref : 328 case _adapter_opt_collect_2_S5_ref : 329 case _adapter_opt_fold_2_ref : 330 case _adapter_opt_collect_2_ref : return 2; 331 case _adapter_opt_fold_3_ref : 332 case _adapter_opt_collect_3_ref : return 3; 333 case _adapter_opt_fold_4_ref : 334 case _adapter_opt_collect_4_ref : return 4; 335 case _adapter_opt_fold_5_ref : 336 case _adapter_opt_collect_5_ref : return 5; 337 default : return -1; // sentinel value for "variable" 338 } 339 } 340 341 static int ek_adapter_opt_collect_slot(EntryKind ek) { 342 assert(ek >= _adapter_opt_collect_FIRST && ek <= _adapter_opt_collect_LAST || 343 ek >= _adapter_opt_fold_FIRST && ek <= _adapter_opt_fold_LAST, ""); 344 switch (ek) { 345 case _adapter_opt_collect_2_S0_ref : 346 case _adapter_opt_filter_S0_ref : return 0; 347 case _adapter_opt_collect_2_S1_ref : 348 case _adapter_opt_filter_S1_ref : return 1; 349 case _adapter_opt_collect_2_S2_ref : 350 case _adapter_opt_filter_S2_ref : return 2; 351 case _adapter_opt_collect_2_S3_ref : 352 case _adapter_opt_filter_S3_ref : return 3; 353 case _adapter_opt_collect_2_S4_ref : 354 case _adapter_opt_filter_S4_ref : return 4; 355 case _adapter_opt_collect_2_S5_ref : 356 case _adapter_opt_filter_S5_ref : return 5; 357 default : return -1; // sentinel value for "variable" 358 } 359 } 360 361 static BasicType ek_adapter_opt_collect_type(EntryKind ek) { 362 assert(ek >= _adapter_opt_collect_FIRST && ek <= _adapter_opt_collect_LAST || 363 ek >= _adapter_opt_fold_FIRST && ek <= _adapter_opt_fold_LAST, ""); 364 switch (ek) { 365 case _adapter_opt_fold_int : 366 case _adapter_opt_collect_int : return T_INT; 367 case _adapter_opt_fold_long : 368 case _adapter_opt_collect_long : return T_LONG; 369 case _adapter_opt_fold_float : 370 case _adapter_opt_collect_float : return T_FLOAT; 371 case _adapter_opt_fold_double : 372 case _adapter_opt_collect_double : return T_DOUBLE; 373 case _adapter_opt_fold_void : 374 case _adapter_opt_collect_void : return T_VOID; 375 default : return T_OBJECT; 376 } 377 } 378 379 static int ek_adapter_opt_return_slot(EntryKind ek) { 380 assert(ek >= _adapter_opt_return_FIRST && ek <= _adapter_opt_return_LAST, ""); 381 switch (ek) { 382 case _adapter_opt_return_S0_ref : return 0; 383 case _adapter_opt_return_S1_ref : return 1; 384 case _adapter_opt_return_S2_ref : return 2; 385 case _adapter_opt_return_S3_ref : return 3; 386 case _adapter_opt_return_S4_ref : return 4; 387 case _adapter_opt_return_S5_ref : return 5; 388 default : return -1; // sentinel value for "variable" 389 } 390 } 391 392 static BasicType ek_adapter_opt_return_type(EntryKind ek) { 393 assert(ek >= _adapter_opt_return_FIRST && ek <= _adapter_opt_return_LAST, ""); 394 switch (ek) { 395 case _adapter_opt_return_int : return T_INT; 396 case _adapter_opt_return_long : return T_LONG; 397 case _adapter_opt_return_float : return T_FLOAT; 398 case _adapter_opt_return_double : return T_DOUBLE; 399 case _adapter_opt_return_void : return T_VOID; 400 case _adapter_opt_return_any : return T_CONFLICT; // sentinel value for "variable" 401 default : return T_OBJECT; 402 } 403 } 404 405 static int ek_adapter_opt_spread_count(EntryKind ek) { 406 assert(ek >= _adapter_opt_spread_FIRST && ek <= _adapter_opt_spread_LAST, ""); 407 switch (ek) { 408 case _adapter_opt_spread_0 : return 0; 409 case _adapter_opt_spread_1_ref : return 1; 410 case _adapter_opt_spread_2_ref : return 2; 411 case _adapter_opt_spread_3_ref : return 3; 412 case _adapter_opt_spread_4_ref : return 4; 413 case _adapter_opt_spread_5_ref : return 5; 414 default : return -1; // sentinel value for "variable" 415 } 416 } 417 418 static BasicType ek_adapter_opt_spread_type(EntryKind ek) { 419 assert(ek >= _adapter_opt_spread_FIRST && ek <= _adapter_opt_spread_LAST, ""); 420 switch (ek) { 421 // (there is no _adapter_opt_spread_boolean; we use byte) 422 case _adapter_opt_spread_byte : return T_BYTE; 423 case _adapter_opt_spread_char : return T_CHAR; 424 case _adapter_opt_spread_short : return T_SHORT; 425 case _adapter_opt_spread_int : return T_INT; 426 case _adapter_opt_spread_long : return T_LONG; 427 case _adapter_opt_spread_float : return T_FLOAT; 428 case _adapter_opt_spread_double : return T_DOUBLE; 429 default : return T_OBJECT; 430 } 431 } 432 433 static methodOop raise_exception_method() { 434 oop rem = JNIHandles::resolve(_raise_exception_method); 435 assert(rem == NULL || rem->is_method(), ""); 436 return (methodOop) rem; 437 } 438 static void set_raise_exception_method(methodOop rem) { 439 assert(_raise_exception_method == NULL, ""); 440 _raise_exception_method = JNIHandles::make_global(Handle(rem)); 441 } 442 443 static jint adapter_conversion(int conv_op, BasicType src, BasicType dest, 444 int stack_move = 0, int vminfo = 0) { 445 assert(conv_op_valid(conv_op), "oob"); 446 jint conv = ((conv_op << CONV_OP_SHIFT) 447 | (src << CONV_SRC_TYPE_SHIFT) 448 | (dest << CONV_DEST_TYPE_SHIFT) 449 | (stack_move << CONV_STACK_MOVE_SHIFT) 450 | (vminfo << CONV_VMINFO_SHIFT) 451 ); 452 assert(adapter_conversion_op(conv) == conv_op, "decode conv_op"); 453 assert(adapter_conversion_src_type(conv) == src, "decode src"); 454 assert(adapter_conversion_dest_type(conv) == dest, "decode dest"); 455 assert(adapter_conversion_stack_move(conv) == stack_move, "decode stack_move"); 456 assert(adapter_conversion_vminfo(conv) == vminfo, "decode vminfo"); 457 return conv; 458 } 459 static int adapter_conversion_op(jint conv) { 460 return ((conv >> CONV_OP_SHIFT) & 0xF); 461 } 462 static BasicType adapter_conversion_src_type(jint conv) { 463 return (BasicType)((conv >> CONV_SRC_TYPE_SHIFT) & 0xF); 464 } 465 static BasicType adapter_conversion_dest_type(jint conv) { 466 return (BasicType)((conv >> CONV_DEST_TYPE_SHIFT) & 0xF); 467 } 468 static int adapter_conversion_stack_move(jint conv) { 469 return (conv >> CONV_STACK_MOVE_SHIFT); 470 } 471 static int adapter_conversion_vminfo(jint conv) { 472 return (conv >> CONV_VMINFO_SHIFT) & CONV_VMINFO_MASK; 473 } 474 475 // Bit mask of conversion_op values. May vary by platform. 476 static int adapter_conversion_ops_supported_mask(); 477 478 static bool conv_op_supported(int conv_op) { 479 assert(conv_op_valid(conv_op), ""); 480 return ((adapter_conversion_ops_supported_mask() & nth_bit(conv_op)) != 0); 481 } 482 483 // Offset in words that the interpreter stack pointer moves when an argument is pushed. 484 // The stack_move value must always be a multiple of this. 485 static int stack_move_unit() { 486 return frame::interpreter_frame_expression_stack_direction() * Interpreter::stackElementWords; 487 } 488 489 // Adapter frame traversal. (Implementation-specific.) 490 static frame ricochet_frame_sender(const frame& fr, RegisterMap* reg_map); 491 static void ricochet_frame_oops_do(const frame& fr, OopClosure* blk, const RegisterMap* reg_map); 492 493 enum { CONV_VMINFO_SIGN_FLAG = 0x80 }; 494 // Shift values for prim-to-prim conversions. 495 static int adapter_prim_to_prim_subword_vminfo(BasicType dest) { 496 if (dest == T_BOOLEAN) return (BitsPerInt - 1); // boolean is 1 bit 497 if (dest == T_CHAR) return (BitsPerInt - BitsPerShort); 498 if (dest == T_BYTE) return (BitsPerInt - BitsPerByte ) | CONV_VMINFO_SIGN_FLAG; 499 if (dest == T_SHORT) return (BitsPerInt - BitsPerShort) | CONV_VMINFO_SIGN_FLAG; 500 return 0; // case T_INT 501 } 502 // Shift values for unboxing a primitive. 503 static int adapter_unbox_subword_vminfo(BasicType dest) { 504 if (dest == T_BOOLEAN) return (BitsPerInt - BitsPerByte ); // implemented as 1 byte 505 if (dest == T_CHAR) return (BitsPerInt - BitsPerShort); 506 if (dest == T_BYTE) return (BitsPerInt - BitsPerByte ) | CONV_VMINFO_SIGN_FLAG; 507 if (dest == T_SHORT) return (BitsPerInt - BitsPerShort) | CONV_VMINFO_SIGN_FLAG; 508 return 0; // case T_INT 509 } 510 // Here is the transformation the i2i adapter must perform: 511 static int truncate_subword_from_vminfo(jint value, int vminfo) { 512 jint tem = value << vminfo; 513 if ((vminfo & CONV_VMINFO_SIGN_FLAG) != 0) { 514 return (jint)tem >> vminfo; 515 } else { 516 return (juint)tem >> vminfo; 517 } 518 } 519 520 static inline address from_compiled_entry(EntryKind ek); 521 static inline address from_interpreted_entry(EntryKind ek); 522 523 // helpers for decode_method. 524 static methodOop decode_methodOop(methodOop m, int& decode_flags_result); 525 static methodHandle decode_vmtarget(oop vmtarget, int vmindex, oop mtype, KlassHandle& receiver_limit_result, int& decode_flags_result); 526 static methodHandle decode_MemberName(oop mname, KlassHandle& receiver_limit_result, int& decode_flags_result); 527 static methodHandle decode_MethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result); 528 static methodHandle decode_DirectMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result); 529 static methodHandle decode_BoundMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result); 530 static methodHandle decode_AdapterMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result); 531 532 // Find out how many stack slots an mh pushes or pops. 533 // The result is *not* reported as a multiple of stack_move_unit(); 534 // It is a signed net number of pushes (a difference in vmslots). 535 // To compare with a stack_move value, first multiply by stack_move_unit(). 536 static int decode_MethodHandle_stack_pushes(oop mh); 537 538 public: 539 // working with member names 540 static void resolve_MemberName(Handle mname, TRAPS); // compute vmtarget/vmindex from name/type 541 static void expand_MemberName(Handle mname, int suppress, TRAPS); // expand defc/name/type if missing 542 static Handle new_MemberName(TRAPS); // must be followed by init_MemberName 543 static void init_MemberName(oop mname_oop, oop target); // compute vmtarget/vmindex from target 544 static void init_MemberName(oop mname_oop, methodOop m, bool do_dispatch = true); 545 static void init_MemberName(oop mname_oop, klassOop field_holder, AccessFlags mods, int offset); 546 static int find_MemberNames(klassOop k, Symbol* name, Symbol* sig, 547 int mflags, klassOop caller, 548 int skip, objArrayOop results); 549 // bit values for suppress argument to expand_MemberName: 550 enum { _suppress_defc = 1, _suppress_name = 2, _suppress_type = 4 }; 551 552 // Generate MethodHandles adapters. 553 static void generate_adapters(); 554 555 // Called from InterpreterGenerator and MethodHandlesAdapterGenerator. 556 static address generate_method_handle_interpreter_entry(MacroAssembler* _masm); 557 static void generate_method_handle_stub(MacroAssembler* _masm, EntryKind ek); 558 559 // argument list parsing 560 static int argument_slot(oop method_type, int arg); 561 static int argument_slot_count(oop method_type) { return argument_slot(method_type, -1); } 562 static int argument_slot_to_argnum(oop method_type, int argslot); 563 564 // Runtime support 565 enum { // bit-encoded flags from decode_method or decode_vmref 566 _dmf_has_receiver = 0x01, // target method has leading reference argument 567 _dmf_does_dispatch = 0x02, // method handle performs virtual or interface dispatch 568 _dmf_from_interface = 0x04, // peforms interface dispatch 569 _DMF_DIRECT_MASK = (_dmf_from_interface*2 - _dmf_has_receiver), 570 _dmf_binds_method = 0x08, 571 _dmf_binds_argument = 0x10, 572 _DMF_BOUND_MASK = (_dmf_binds_argument*2 - _dmf_binds_method), 573 _dmf_adapter_lsb = 0x20, 574 _DMF_ADAPTER_MASK = (_dmf_adapter_lsb << CONV_OP_LIMIT) - _dmf_adapter_lsb 575 }; 576 static methodHandle decode_method(oop x, KlassHandle& receiver_limit_result, int& decode_flags_result); 577 enum { 578 // format of query to getConstant: 579 GC_JVM_PUSH_LIMIT = 0, 580 GC_JVM_STACK_MOVE_UNIT = 1, 581 GC_CONV_OP_IMPLEMENTED_MASK = 2, 582 583 // format of result from getTarget / encode_target: 584 ETF_HANDLE_OR_METHOD_NAME = 0, // all available data (immediate MH or method) 585 ETF_DIRECT_HANDLE = 1, // ultimate method handle (will be a DMH, may be self) 586 ETF_METHOD_NAME = 2, // ultimate method as MemberName 587 ETF_REFLECT_METHOD = 3 // ultimate method as java.lang.reflect object (sans refClass) 588 }; 589 static int get_named_constant(int which, Handle name_box, TRAPS); 590 static oop encode_target(Handle mh, int format, TRAPS); // report vmtarget (to Java code) 591 static bool class_cast_needed(klassOop src, klassOop dst); 592 593 static instanceKlassHandle resolve_instance_klass(oop java_mirror_oop, TRAPS); 594 static instanceKlassHandle resolve_instance_klass(jclass java_mirror_jh, TRAPS) { 595 return resolve_instance_klass(JNIHandles::resolve(java_mirror_jh), THREAD); 596 } 597 598 private: 599 // These checkers operate on a pair of whole MethodTypes: 600 static const char* check_method_type_change(oop src_mtype, int src_beg, int src_end, 601 int insert_argnum, oop insert_type, 602 int change_argnum, oop change_type, 603 int delete_argnum, 604 oop dst_mtype, int dst_beg, int dst_end, 605 bool raw = false); 606 static const char* check_method_type_insertion(oop src_mtype, 607 int insert_argnum, oop insert_type, 608 oop dst_mtype) { 609 oop no_ref = NULL; 610 return check_method_type_change(src_mtype, 0, -1, 611 insert_argnum, insert_type, 612 -1, no_ref, -1, dst_mtype, 0, -1); 613 } 614 static const char* check_method_type_conversion(oop src_mtype, 615 int change_argnum, oop change_type, 616 oop dst_mtype) { 617 oop no_ref = NULL; 618 return check_method_type_change(src_mtype, 0, -1, -1, no_ref, 619 change_argnum, change_type, 620 -1, dst_mtype, 0, -1); 621 } 622 static const char* check_method_type_passthrough(oop src_mtype, oop dst_mtype, bool raw) { 623 oop no_ref = NULL; 624 return check_method_type_change(src_mtype, 0, -1, 625 -1, no_ref, -1, no_ref, -1, 626 dst_mtype, 0, -1, raw); 627 } 628 629 // These checkers operate on pairs of argument or return types: 630 static const char* check_argument_type_change(BasicType src_type, klassOop src_klass, 631 BasicType dst_type, klassOop dst_klass, 632 int argnum, bool raw = false); 633 634 static const char* check_argument_type_change(oop src_type, oop dst_type, 635 int argnum, bool raw = false) { 636 klassOop src_klass = NULL, dst_klass = NULL; 637 BasicType src_bt = java_lang_Class::as_BasicType(src_type, &src_klass); 638 BasicType dst_bt = java_lang_Class::as_BasicType(dst_type, &dst_klass); 639 return check_argument_type_change(src_bt, src_klass, 640 dst_bt, dst_klass, argnum, raw); 641 } 642 643 static const char* check_return_type_change(oop src_type, oop dst_type, bool raw = false) { 644 return check_argument_type_change(src_type, dst_type, -1, raw); 645 } 646 647 static const char* check_return_type_change(BasicType src_type, klassOop src_klass, 648 BasicType dst_type, klassOop dst_klass) { 649 return check_argument_type_change(src_type, src_klass, dst_type, dst_klass, -1); 650 } 651 652 static const char* check_method_receiver(methodOop m, klassOop passed_recv_type); 653 654 // These verifiers can block, and will throw an error if the checking fails: 655 static void verify_vmslots(Handle mh, TRAPS); 656 static void verify_vmargslot(Handle mh, int argnum, int argslot, TRAPS); 657 658 static void verify_method_type(methodHandle m, Handle mtype, 659 bool has_bound_oop, 660 KlassHandle bound_oop_type, 661 TRAPS); 662 663 static void verify_method_signature(methodHandle m, Handle mtype, 664 int first_ptype_pos, 665 KlassHandle insert_ptype, TRAPS); 666 667 static void verify_DirectMethodHandle(Handle mh, methodHandle m, TRAPS); 668 static void verify_BoundMethodHandle(Handle mh, Handle target, int argnum, 669 bool direct_to_method, TRAPS); 670 static void verify_BoundMethodHandle_with_receiver(Handle mh, methodHandle m, TRAPS); 671 static void verify_AdapterMethodHandle(Handle mh, int argnum, TRAPS); 672 673 public: 674 675 // Fill in the fields of a DirectMethodHandle mh. (MH.type must be pre-filled.) 676 static void init_DirectMethodHandle(Handle mh, methodHandle method, bool do_dispatch, TRAPS); 677 678 // Fill in the fields of a BoundMethodHandle mh. (MH.type, BMH.argument must be pre-filled.) 679 static void init_BoundMethodHandle(Handle mh, Handle target, int argnum, TRAPS); 680 static void init_BoundMethodHandle_with_receiver(Handle mh, 681 methodHandle original_m, 682 KlassHandle receiver_limit, 683 int decode_flags, 684 TRAPS); 685 686 // Fill in the fields of an AdapterMethodHandle mh. (MH.type must be pre-filled.) 687 static void init_AdapterMethodHandle(Handle mh, Handle target, int argnum, TRAPS); 688 static void ensure_vmlayout_field(Handle target, TRAPS); 689 690 #ifdef ASSERT 691 static bool spot_check_entry_names(); 692 #endif 693 694 private: 695 static methodHandle dispatch_decoded_method(methodHandle m, 696 KlassHandle receiver_limit, 697 int decode_flags, 698 KlassHandle receiver_klass, 699 TRAPS); 700 701 public: 702 static bool is_float_fixed_reinterpretation_cast(BasicType src, BasicType dst); 703 static bool same_basic_type_for_arguments(BasicType src, BasicType dst, 704 bool raw = false, 705 bool for_return = false); 706 static bool same_basic_type_for_returns(BasicType src, BasicType dst, bool raw = false) { 707 return same_basic_type_for_arguments(src, dst, raw, true); 708 } 709 710 static Symbol* convert_to_signature(oop type_str, bool polymorphic, TRAPS); 711 712 #ifdef TARGET_ARCH_x86 713 # include "methodHandles_x86.hpp" 714 #endif 715 #ifdef TARGET_ARCH_sparc 716 #define TARGET_ARCH_NYI_6939861 1 //FIXME 717 //# include "methodHandles_sparc.hpp" 718 #endif 719 #ifdef TARGET_ARCH_zero 720 #define TARGET_ARCH_NYI_6939861 1 //FIXME 721 //# include "methodHandles_zero.hpp" 722 #endif 723 #ifdef TARGET_ARCH_arm 724 #define TARGET_ARCH_NYI_6939861 1 //FIXME 725 //# include "methodHandles_arm.hpp" 726 #endif 727 #ifdef TARGET_ARCH_ppc 728 #define TARGET_ARCH_NYI_6939861 1 //FIXME 729 //# include "methodHandles_ppc.hpp" 730 #endif 731 732 #ifdef TARGET_ARCH_NYI_6939861 733 // Here are some backward compatible declarations until the 6939861 ports are updated. 734 #define _adapter_flyby (_EK_LIMIT + 10) 735 #define _adapter_ricochet (_EK_LIMIT + 11) 736 #define _adapter_opt_spread_1 _adapter_opt_spread_1_ref 737 #define _adapter_opt_spread_more _adapter_opt_spread_ref 738 enum { 739 _INSERT_NO_MASK = -1, 740 _INSERT_REF_MASK = 0, 741 _INSERT_INT_MASK = 1, 742 _INSERT_LONG_MASK = 3 743 }; 744 static void get_ek_bound_mh_info(EntryKind ek, BasicType& arg_type, int& arg_mask, int& arg_slots) { 745 arg_type = ek_bound_mh_arg_type(ek); 746 arg_mask = 0; 747 arg_slots = type2size[arg_type];; 748 } 749 static void get_ek_adapter_opt_swap_rot_info(EntryKind ek, int& swap_bytes, int& rotate) { 750 int swap_slots = ek_adapter_opt_swap_slots(ek); 751 rotate = ek_adapter_opt_swap_mode(ek); 752 swap_bytes = swap_slots * Interpreter::stackElementSize; 753 } 754 static int get_ek_adapter_opt_spread_info(EntryKind ek) { 755 return ek_adapter_opt_spread_count(ek); 756 } 757 758 static void insert_arg_slots(MacroAssembler* _masm, 759 RegisterOrConstant arg_slots, 760 int arg_mask, 761 Register argslot_reg, 762 Register temp_reg, Register temp2_reg, Register temp3_reg = noreg); 763 764 static void remove_arg_slots(MacroAssembler* _masm, 765 RegisterOrConstant arg_slots, 766 Register argslot_reg, 767 Register temp_reg, Register temp2_reg, Register temp3_reg = noreg); 768 769 static void trace_method_handle(MacroAssembler* _masm, const char* adaptername) PRODUCT_RETURN; 770 #endif //TARGET_ARCH_NYI_6939861 771 }; 772 773 774 // Access methods for the "entry" field of a java.lang.invoke.MethodHandle. 775 // The field is primarily a jump target for compiled calls. 776 // However, we squirrel away some nice pointers for other uses, 777 // just before the jump target. 778 // Aspects of a method handle entry: 779 // - from_compiled_entry - stub used when compiled code calls the MH 780 // - from_interpreted_entry - stub used when the interpreter calls the MH 781 // - type_checking_entry - stub for runtime casting between MHForm siblings (NYI) 782 class MethodHandleEntry { 783 public: 784 class Data { 785 friend class MethodHandleEntry; 786 size_t _total_size; // size including Data and code stub 787 MethodHandleEntry* _type_checking_entry; 788 address _from_interpreted_entry; 789 MethodHandleEntry* method_entry() { return (MethodHandleEntry*)(this + 1); } 790 }; 791 792 Data* data() { return (Data*)this - 1; } 793 794 address start_address() { return (address) data(); } 795 address end_address() { return start_address() + data()->_total_size; } 796 797 address from_compiled_entry() { return (address) this; } 798 799 address from_interpreted_entry() { return data()->_from_interpreted_entry; } 800 void set_from_interpreted_entry(address e) { data()->_from_interpreted_entry = e; } 801 802 MethodHandleEntry* type_checking_entry() { return data()->_type_checking_entry; } 803 void set_type_checking_entry(MethodHandleEntry* e) { data()->_type_checking_entry = e; } 804 805 void set_end_address(address end_addr) { 806 size_t total_size = end_addr - start_address(); 807 assert(total_size > 0 && total_size < 0x1000, "reasonable end address"); 808 data()->_total_size = total_size; 809 } 810 811 // Compiler support: 812 static int from_interpreted_entry_offset_in_bytes() { 813 return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); 814 } 815 static int type_checking_entry_offset_in_bytes() { 816 return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); 817 } 818 819 static address start_compiled_entry(MacroAssembler* _masm, 820 address interpreted_entry = NULL); 821 static MethodHandleEntry* finish_compiled_entry(MacroAssembler* masm, address start_addr); 822 }; 823 824 address MethodHandles::from_compiled_entry(EntryKind ek) { return entry(ek)->from_compiled_entry(); } 825 address MethodHandles::from_interpreted_entry(EntryKind ek) { return entry(ek)->from_interpreted_entry(); } 826 827 828 //------------------------------------------------------------------------------ 829 // MethodHandlesAdapterGenerator 830 // 831 class MethodHandlesAdapterGenerator : public StubCodeGenerator { 832 public: 833 MethodHandlesAdapterGenerator(CodeBuffer* code) : StubCodeGenerator(code) {} 834 835 void generate(); 836 }; 837 838 #endif // SHARE_VM_PRIMS_METHODHANDLES_HPP