Mercurial > hg > truffle
annotate src/share/vm/prims/methodHandles.hpp @ 1507:cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
Summary: split MethodHandle.invoke into invokeExact and invokeGeneric; also clean up JVM-to-Java interfaces
Reviewed-by: twisti
| author | jrose |
|---|---|
| date | Sat, 01 May 2010 02:42:18 -0700 |
| parents | 2338d41fbd81 |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 710 | 1 /* |
| 1304 | 2 * Copyright 2008-2010 Sun Microsystems, Inc. All Rights Reserved. |
| 710 | 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 | |
| 25 class MacroAssembler; | |
| 26 class Label; | |
| 27 class MethodHandleEntry; | |
| 28 | |
| 29 class 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 { | |
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35 _raise_exception, // stub for error generation from other stubs |
| 710 | 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, | |
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49 _adapter_retype_raw = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW, |
| 710 | 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]; | |
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116 static jobject _raise_exception_method; |
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117 |
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118 // Adapters. |
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119 static MethodHandlesAdapterBlob* _adapter_code; |
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120 static int _adapter_code_size; |
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121 |
| 710 | 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 | |
| 1304 | 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. | |
| 1506 | 166 swap_bytes = swap_slots * Interpreter::stackElementSize; |
| 1304 | 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 | |
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177 static methodOop raise_exception_method() { |
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178 oop rem = JNIHandles::resolve(_raise_exception_method); |
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179 assert(rem == NULL || rem->is_method(), ""); |
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180 return (methodOop) rem; |
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181 } |
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182 static void set_raise_exception_method(methodOop rem) { |
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183 assert(_raise_exception_method == NULL, ""); |
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184 _raise_exception_method = JNIHandles::make_global(Handle(rem)); |
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185 } |
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186 |
| 710 | 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 | |
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219 // Bit mask of conversion_op values. May vary by platform. |
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220 static int adapter_conversion_ops_supported_mask(); |
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221 |
| 710 | 222 // Offset in words that the interpreter stack pointer moves when an argument is pushed. |
| 223 // The stack_move value must always be a multiple of this. | |
| 224 static int stack_move_unit() { | |
| 1506 | 225 return frame::interpreter_frame_expression_stack_direction() * Interpreter::stackElementWords; |
| 710 | 226 } |
| 227 | |
| 228 enum { CONV_VMINFO_SIGN_FLAG = 0x80 }; | |
| 229 static int adapter_subword_vminfo(BasicType dest) { | |
| 230 if (dest == T_BOOLEAN) return (BitsPerInt - 1); | |
| 231 if (dest == T_CHAR) return (BitsPerInt - 16); | |
| 232 if (dest == T_BYTE) return (BitsPerInt - 8) | CONV_VMINFO_SIGN_FLAG; | |
| 233 if (dest == T_SHORT) return (BitsPerInt - 16) | CONV_VMINFO_SIGN_FLAG; | |
| 234 return 0; // case T_INT | |
| 235 } | |
| 236 // Here is the transformation the i2i adapter must perform: | |
| 237 static int truncate_subword_from_vminfo(jint value, int vminfo) { | |
| 238 jint tem = value << vminfo; | |
| 239 if ((vminfo & CONV_VMINFO_SIGN_FLAG) != 0) { | |
| 240 return (jint)tem >> vminfo; | |
| 241 } else { | |
| 242 return (juint)tem >> vminfo; | |
| 243 } | |
| 244 } | |
| 245 | |
| 246 static inline address from_compiled_entry(EntryKind ek); | |
| 247 static inline address from_interpreted_entry(EntryKind ek); | |
| 248 | |
| 249 // helpers for decode_method. | |
| 250 static methodOop decode_methodOop(methodOop m, int& decode_flags_result); | |
| 251 static methodOop decode_vmtarget(oop vmtarget, int vmindex, oop mtype, klassOop& receiver_limit_result, int& decode_flags_result); | |
| 252 static methodOop decode_MemberName(oop mname, klassOop& receiver_limit_result, int& decode_flags_result); | |
| 253 static methodOop decode_MethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); | |
| 254 static methodOop decode_DirectMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); | |
| 255 static methodOop decode_BoundMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); | |
| 256 static methodOop decode_AdapterMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); | |
| 257 | |
| 258 // Find out how many stack slots an mh pushes or pops. | |
| 259 // The result is *not* reported as a multiple of stack_move_unit(); | |
| 260 // It is a signed net number of pushes (a difference in vmslots). | |
| 261 // To compare with a stack_move value, first multiply by stack_move_unit(). | |
| 262 static int decode_MethodHandle_stack_pushes(oop mh); | |
| 263 | |
| 264 public: | |
| 265 // working with member names | |
| 266 static void resolve_MemberName(Handle mname, TRAPS); // compute vmtarget/vmindex from name/type | |
| 267 static void expand_MemberName(Handle mname, int suppress, TRAPS); // expand defc/name/type if missing | |
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268 static Handle new_MemberName(TRAPS); // must be followed by init_MemberName |
| 710 | 269 static void init_MemberName(oop mname_oop, oop target); // compute vmtarget/vmindex from target |
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270 static void init_MemberName(oop mname_oop, methodOop m, bool do_dispatch = true); |
| 710 | 271 static void init_MemberName(oop mname_oop, klassOop field_holder, AccessFlags mods, int offset); |
| 272 static int find_MemberNames(klassOop k, symbolOop name, symbolOop sig, | |
| 273 int mflags, klassOop caller, | |
| 274 int skip, objArrayOop results); | |
| 275 // bit values for suppress argument to expand_MemberName: | |
| 276 enum { _suppress_defc = 1, _suppress_name = 2, _suppress_type = 4 }; | |
| 277 | |
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278 // Generate MethodHandles adapters. |
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279 static void generate_adapters(); |
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280 |
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281 // Called from InterpreterGenerator and MethodHandlesAdapterGenerator. |
| 710 | 282 static address generate_method_handle_interpreter_entry(MacroAssembler* _masm); |
| 283 static void generate_method_handle_stub(MacroAssembler* _masm, EntryKind ek); | |
| 284 | |
| 285 // argument list parsing | |
| 286 static int argument_slot(oop method_type, int arg); | |
| 287 static int argument_slot_count(oop method_type) { return argument_slot(method_type, -1); } | |
| 288 static int argument_slot_to_argnum(oop method_type, int argslot); | |
| 289 | |
| 290 // Runtime support | |
| 291 enum { // bit-encoded flags from decode_method or decode_vmref | |
| 292 _dmf_has_receiver = 0x01, // target method has leading reference argument | |
| 293 _dmf_does_dispatch = 0x02, // method handle performs virtual or interface dispatch | |
| 294 _dmf_from_interface = 0x04, // peforms interface dispatch | |
| 295 _DMF_DIRECT_MASK = (_dmf_from_interface*2 - _dmf_has_receiver), | |
| 296 _dmf_binds_method = 0x08, | |
| 297 _dmf_binds_argument = 0x10, | |
| 298 _DMF_BOUND_MASK = (_dmf_binds_argument*2 - _dmf_binds_method), | |
| 299 _dmf_adapter_lsb = 0x20, | |
| 300 _DMF_ADAPTER_MASK = (_dmf_adapter_lsb << CONV_OP_LIMIT) - _dmf_adapter_lsb | |
| 301 }; | |
| 302 static methodOop decode_method(oop x, klassOop& receiver_limit_result, int& decode_flags_result); | |
| 303 enum { | |
| 304 // format of query to getConstant: | |
| 305 GC_JVM_PUSH_LIMIT = 0, | |
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306 GC_JVM_STACK_MOVE_UNIT = 1, |
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307 GC_CONV_OP_IMPLEMENTED_MASK = 2, |
| 710 | 308 |
| 309 // format of result from getTarget / encode_target: | |
| 310 ETF_HANDLE_OR_METHOD_NAME = 0, // all available data (immediate MH or method) | |
| 311 ETF_DIRECT_HANDLE = 1, // ultimate method handle (will be a DMH, may be self) | |
| 312 ETF_METHOD_NAME = 2, // ultimate method as MemberName | |
| 313 ETF_REFLECT_METHOD = 3 // ultimate method as java.lang.reflect object (sans refClass) | |
| 314 }; | |
| 315 static int get_named_constant(int which, Handle name_box, TRAPS); | |
| 316 static oop encode_target(Handle mh, int format, TRAPS); // report vmtarget (to Java code) | |
| 317 static bool class_cast_needed(klassOop src, klassOop dst); | |
| 318 | |
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319 static instanceKlassHandle resolve_instance_klass(oop java_mirror_oop, TRAPS); |
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320 static instanceKlassHandle resolve_instance_klass(jclass java_mirror_jh, TRAPS) { |
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321 return resolve_instance_klass(JNIHandles::resolve(java_mirror_jh), THREAD); |
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322 } |
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323 |
| 710 | 324 private: |
| 325 // These checkers operate on a pair of whole MethodTypes: | |
| 326 static const char* check_method_type_change(oop src_mtype, int src_beg, int src_end, | |
| 327 int insert_argnum, oop insert_type, | |
| 328 int change_argnum, oop change_type, | |
| 329 int delete_argnum, | |
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330 oop dst_mtype, int dst_beg, int dst_end, |
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331 bool raw = false); |
| 710 | 332 static const char* check_method_type_insertion(oop src_mtype, |
| 333 int insert_argnum, oop insert_type, | |
| 334 oop dst_mtype) { | |
| 335 oop no_ref = NULL; | |
| 336 return check_method_type_change(src_mtype, 0, -1, | |
| 337 insert_argnum, insert_type, | |
| 338 -1, no_ref, -1, dst_mtype, 0, -1); | |
| 339 } | |
| 340 static const char* check_method_type_conversion(oop src_mtype, | |
| 341 int change_argnum, oop change_type, | |
| 342 oop dst_mtype) { | |
| 343 oop no_ref = NULL; | |
| 344 return check_method_type_change(src_mtype, 0, -1, -1, no_ref, | |
| 345 change_argnum, change_type, | |
| 346 -1, dst_mtype, 0, -1); | |
| 347 } | |
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348 static const char* check_method_type_passthrough(oop src_mtype, oop dst_mtype, bool raw) { |
| 710 | 349 oop no_ref = NULL; |
| 350 return check_method_type_change(src_mtype, 0, -1, | |
| 351 -1, no_ref, -1, no_ref, -1, | |
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352 dst_mtype, 0, -1, raw); |
| 710 | 353 } |
| 354 | |
| 355 // These checkers operate on pairs of argument or return types: | |
| 356 static const char* check_argument_type_change(BasicType src_type, klassOop src_klass, | |
| 357 BasicType dst_type, klassOop dst_klass, | |
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358 int argnum, bool raw = false); |
| 710 | 359 |
| 360 static const char* check_argument_type_change(oop src_type, oop dst_type, | |
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361 int argnum, bool raw = false) { |
| 710 | 362 klassOop src_klass = NULL, dst_klass = NULL; |
| 363 BasicType src_bt = java_lang_Class::as_BasicType(src_type, &src_klass); | |
| 364 BasicType dst_bt = java_lang_Class::as_BasicType(dst_type, &dst_klass); | |
| 365 return check_argument_type_change(src_bt, src_klass, | |
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366 dst_bt, dst_klass, argnum, raw); |
| 710 | 367 } |
| 368 | |
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369 static const char* check_return_type_change(oop src_type, oop dst_type, bool raw = false) { |
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370 return check_argument_type_change(src_type, dst_type, -1, raw); |
| 710 | 371 } |
| 372 | |
| 373 static const char* check_return_type_change(BasicType src_type, klassOop src_klass, | |
| 374 BasicType dst_type, klassOop dst_klass) { | |
| 375 return check_argument_type_change(src_type, src_klass, dst_type, dst_klass, -1); | |
| 376 } | |
| 377 | |
| 378 static const char* check_method_receiver(methodOop m, klassOop passed_recv_type); | |
| 379 | |
| 380 // These verifiers can block, and will throw an error if the checking fails: | |
| 381 static void verify_vmslots(Handle mh, TRAPS); | |
| 382 static void verify_vmargslot(Handle mh, int argnum, int argslot, TRAPS); | |
| 383 | |
| 384 static void verify_method_type(methodHandle m, Handle mtype, | |
| 385 bool has_bound_oop, | |
| 386 KlassHandle bound_oop_type, | |
| 387 TRAPS); | |
| 388 | |
| 389 static void verify_method_signature(methodHandle m, Handle mtype, | |
| 390 int first_ptype_pos, | |
| 391 KlassHandle insert_ptype, TRAPS); | |
| 392 | |
| 393 static void verify_DirectMethodHandle(Handle mh, methodHandle m, TRAPS); | |
| 394 static void verify_BoundMethodHandle(Handle mh, Handle target, int argnum, | |
| 395 bool direct_to_method, TRAPS); | |
| 396 static void verify_BoundMethodHandle_with_receiver(Handle mh, methodHandle m, TRAPS); | |
| 397 static void verify_AdapterMethodHandle(Handle mh, int argnum, TRAPS); | |
| 398 | |
| 399 public: | |
| 400 | |
| 401 // Fill in the fields of a DirectMethodHandle mh. (MH.type must be pre-filled.) | |
| 402 static void init_DirectMethodHandle(Handle mh, methodHandle method, bool do_dispatch, TRAPS); | |
| 403 | |
| 404 // Fill in the fields of a BoundMethodHandle mh. (MH.type, BMH.argument must be pre-filled.) | |
| 405 static void init_BoundMethodHandle(Handle mh, Handle target, int argnum, TRAPS); | |
| 406 static void init_BoundMethodHandle_with_receiver(Handle mh, | |
| 407 methodHandle original_m, | |
| 408 KlassHandle receiver_limit, | |
| 409 int decode_flags, | |
| 410 TRAPS); | |
| 411 | |
| 412 // Fill in the fields of an AdapterMethodHandle mh. (MH.type must be pre-filled.) | |
| 413 static void init_AdapterMethodHandle(Handle mh, Handle target, int argnum, TRAPS); | |
| 414 | |
| 415 #ifdef ASSERT | |
| 416 static bool spot_check_entry_names(); | |
| 417 #endif | |
| 418 | |
| 419 private: | |
| 420 static methodHandle dispatch_decoded_method(methodHandle m, | |
| 421 KlassHandle receiver_limit, | |
| 422 int decode_flags, | |
| 423 KlassHandle receiver_klass, | |
| 424 TRAPS); | |
| 425 | |
| 426 static bool same_basic_type_for_arguments(BasicType src, BasicType dst, | |
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427 bool raw = false, |
| 710 | 428 bool for_return = false); |
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429 static bool same_basic_type_for_returns(BasicType src, BasicType dst, bool raw = false) { |
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430 return same_basic_type_for_arguments(src, dst, raw, true); |
| 710 | 431 } |
| 432 | |
| 433 enum { // arg_mask values | |
| 434 _INSERT_NO_MASK = -1, | |
| 435 _INSERT_REF_MASK = 0, | |
| 436 _INSERT_INT_MASK = 1, | |
| 437 _INSERT_LONG_MASK = 3 | |
| 438 }; | |
| 439 static void insert_arg_slots(MacroAssembler* _masm, | |
| 440 RegisterOrConstant arg_slots, | |
| 441 int arg_mask, | |
| 1304 | 442 Register argslot_reg, |
| 1503 | 443 Register temp_reg, Register temp2_reg, Register temp3_reg = noreg); |
| 710 | 444 |
| 445 static void remove_arg_slots(MacroAssembler* _masm, | |
| 446 RegisterOrConstant arg_slots, | |
| 1304 | 447 Register argslot_reg, |
| 1503 | 448 Register temp_reg, Register temp2_reg, Register temp3_reg = noreg); |
| 710 | 449 }; |
| 450 | |
| 451 | |
| 452 // Access methods for the "entry" field of a java.dyn.MethodHandle. | |
| 453 // The field is primarily a jump target for compiled calls. | |
| 454 // However, we squirrel away some nice pointers for other uses, | |
| 455 // just before the jump target. | |
| 456 // Aspects of a method handle entry: | |
| 457 // - from_compiled_entry - stub used when compiled code calls the MH | |
| 458 // - from_interpreted_entry - stub used when the interpreter calls the MH | |
| 459 // - type_checking_entry - stub for runtime casting between MHForm siblings (NYI) | |
| 460 class MethodHandleEntry { | |
| 461 public: | |
| 462 class Data { | |
| 463 friend class MethodHandleEntry; | |
| 464 size_t _total_size; // size including Data and code stub | |
| 465 MethodHandleEntry* _type_checking_entry; | |
| 466 address _from_interpreted_entry; | |
| 467 MethodHandleEntry* method_entry() { return (MethodHandleEntry*)(this + 1); } | |
| 468 }; | |
| 469 | |
| 470 Data* data() { return (Data*)this - 1; } | |
| 471 | |
| 472 address start_address() { return (address) data(); } | |
| 473 address end_address() { return start_address() + data()->_total_size; } | |
| 474 | |
| 475 address from_compiled_entry() { return (address) this; } | |
| 476 | |
| 477 address from_interpreted_entry() { return data()->_from_interpreted_entry; } | |
| 478 void set_from_interpreted_entry(address e) { data()->_from_interpreted_entry = e; } | |
| 479 | |
| 480 MethodHandleEntry* type_checking_entry() { return data()->_type_checking_entry; } | |
| 481 void set_type_checking_entry(MethodHandleEntry* e) { data()->_type_checking_entry = e; } | |
| 482 | |
| 483 void set_end_address(address end_addr) { | |
| 484 size_t total_size = end_addr - start_address(); | |
| 485 assert(total_size > 0 && total_size < 0x1000, "reasonable end address"); | |
| 486 data()->_total_size = total_size; | |
| 487 } | |
| 488 | |
| 489 // Compiler support: | |
| 490 static int from_interpreted_entry_offset_in_bytes() { | |
| 491 return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); | |
| 492 } | |
| 493 static int type_checking_entry_offset_in_bytes() { | |
| 494 return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); | |
| 495 } | |
| 496 | |
| 497 static address start_compiled_entry(MacroAssembler* _masm, | |
| 498 address interpreted_entry = NULL); | |
| 499 static MethodHandleEntry* finish_compiled_entry(MacroAssembler* masm, address start_addr); | |
| 500 }; | |
| 501 | |
| 502 address MethodHandles::from_compiled_entry(EntryKind ek) { return entry(ek)->from_compiled_entry(); } | |
| 503 address MethodHandles::from_interpreted_entry(EntryKind ek) { return entry(ek)->from_interpreted_entry(); } | |
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504 |
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505 |
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506 //------------------------------------------------------------------------------ |
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507 // MethodHandlesAdapterGenerator |
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508 // |
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509 class MethodHandlesAdapterGenerator : public StubCodeGenerator { |
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510 public: |
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511 MethodHandlesAdapterGenerator(CodeBuffer* code) : StubCodeGenerator(code) {} |
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512 |
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513 void generate(); |
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514 }; |