Wed, 11 Jan 2012 17:34:02 -0500
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
Summary: Added a nop tracing infrastructure, JFR makefile changes and other infrastructure used only by JFR.
Reviewed-by: acorn, sspitsyn
Contributed-by: markus.gronlund@oracle.com
jrose@1145 | 1 | /* |
twisti@2436 | 2 | * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved. |
jrose@1145 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
jrose@1145 | 4 | * |
jrose@1145 | 5 | * This code is free software; you can redistribute it and/or modify it |
jrose@1145 | 6 | * under the terms of the GNU General Public License version 2 only, as |
jrose@1145 | 7 | * published by the Free Software Foundation. |
jrose@1145 | 8 | * |
jrose@1145 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
jrose@1145 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
jrose@1145 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
jrose@1145 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
jrose@1145 | 13 | * accompanied this code). |
jrose@1145 | 14 | * |
jrose@1145 | 15 | * You should have received a copy of the GNU General Public License version |
jrose@1145 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
jrose@1145 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
jrose@1145 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
jrose@1145 | 22 | * |
jrose@1145 | 23 | */ |
jrose@1145 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "classfile/symbolTable.hpp" |
jrose@2982 | 27 | #include "compiler/compileBroker.hpp" |
stefank@2314 | 28 | #include "interpreter/interpreter.hpp" |
never@2920 | 29 | #include "interpreter/oopMapCache.hpp" |
stefank@2314 | 30 | #include "memory/allocation.inline.hpp" |
stefank@2314 | 31 | #include "memory/oopFactory.hpp" |
stefank@2314 | 32 | #include "prims/methodHandles.hpp" |
never@2920 | 33 | #include "prims/methodHandleWalk.hpp" |
jrose@2982 | 34 | #include "runtime/compilationPolicy.hpp" |
stefank@2314 | 35 | #include "runtime/javaCalls.hpp" |
stefank@2314 | 36 | #include "runtime/reflection.hpp" |
stefank@2314 | 37 | #include "runtime/signature.hpp" |
stefank@2314 | 38 | #include "runtime/stubRoutines.hpp" |
stefank@2314 | 39 | |
jrose@1145 | 40 | /* |
jrose@1145 | 41 | * JSR 292 reference implementation: method handles |
jrose@1145 | 42 | */ |
jrose@1145 | 43 | |
jrose@1145 | 44 | bool MethodHandles::_enabled = false; // set true after successful native linkage |
jrose@1145 | 45 | |
jrose@1145 | 46 | MethodHandleEntry* MethodHandles::_entries[MethodHandles::_EK_LIMIT] = {NULL}; |
jrose@1145 | 47 | const char* MethodHandles::_entry_names[_EK_LIMIT+1] = { |
jrose@1474 | 48 | "raise_exception", |
jrose@1145 | 49 | "invokestatic", // how a MH emulates invokestatic |
jrose@1145 | 50 | "invokespecial", // ditto for the other invokes... |
jrose@1145 | 51 | "invokevirtual", |
jrose@1145 | 52 | "invokeinterface", |
jrose@1145 | 53 | "bound_ref", // these are for BMH... |
jrose@1145 | 54 | "bound_int", |
jrose@1145 | 55 | "bound_long", |
jrose@1145 | 56 | "bound_ref_direct", // (direct versions have a direct methodOop) |
jrose@1145 | 57 | "bound_int_direct", |
jrose@1145 | 58 | "bound_long_direct", |
jrose@1145 | 59 | |
jrose@1145 | 60 | // starting at _adapter_mh_first: |
jrose@1145 | 61 | "adapter_retype_only", // these are for AMH... |
jrose@1474 | 62 | "adapter_retype_raw", |
jrose@1145 | 63 | "adapter_check_cast", |
jrose@1145 | 64 | "adapter_prim_to_prim", |
jrose@1145 | 65 | "adapter_ref_to_prim", |
jrose@1145 | 66 | "adapter_prim_to_ref", |
jrose@1145 | 67 | "adapter_swap_args", |
jrose@1145 | 68 | "adapter_rot_args", |
jrose@1145 | 69 | "adapter_dup_args", |
jrose@1145 | 70 | "adapter_drop_args", |
jrose@1145 | 71 | "adapter_collect_args", |
jrose@1145 | 72 | "adapter_spread_args", |
never@2895 | 73 | "adapter_fold_args", |
never@2895 | 74 | "adapter_unused_13", |
jrose@1145 | 75 | |
jrose@1145 | 76 | // optimized adapter types: |
jrose@1145 | 77 | "adapter_swap_args/1", |
jrose@1145 | 78 | "adapter_swap_args/2", |
jrose@1145 | 79 | "adapter_rot_args/1,up", |
jrose@1145 | 80 | "adapter_rot_args/1,down", |
jrose@1145 | 81 | "adapter_rot_args/2,up", |
jrose@1145 | 82 | "adapter_rot_args/2,down", |
jrose@1145 | 83 | "adapter_prim_to_prim/i2i", |
jrose@1145 | 84 | "adapter_prim_to_prim/l2i", |
jrose@1145 | 85 | "adapter_prim_to_prim/d2f", |
jrose@1145 | 86 | "adapter_prim_to_prim/i2l", |
jrose@1145 | 87 | "adapter_prim_to_prim/f2d", |
jrose@1145 | 88 | "adapter_ref_to_prim/unboxi", |
jrose@1145 | 89 | "adapter_ref_to_prim/unboxl", |
never@2895 | 90 | |
never@2895 | 91 | // return value handlers for collect/filter/fold adapters: |
never@2895 | 92 | "return/ref", |
never@2895 | 93 | "return/int", |
never@2895 | 94 | "return/long", |
never@2895 | 95 | "return/float", |
never@2895 | 96 | "return/double", |
never@2895 | 97 | "return/void", |
never@2895 | 98 | "return/S0/ref", |
never@2895 | 99 | "return/S1/ref", |
never@2895 | 100 | "return/S2/ref", |
never@2895 | 101 | "return/S3/ref", |
never@2895 | 102 | "return/S4/ref", |
never@2895 | 103 | "return/S5/ref", |
never@2895 | 104 | "return/any", |
never@2895 | 105 | |
never@2895 | 106 | // spreading (array length cases 0, 1, ...) |
never@2895 | 107 | "adapter_spread/0", |
never@2895 | 108 | "adapter_spread/1/ref", |
never@2895 | 109 | "adapter_spread/2/ref", |
never@2895 | 110 | "adapter_spread/3/ref", |
never@2895 | 111 | "adapter_spread/4/ref", |
never@2895 | 112 | "adapter_spread/5/ref", |
never@2895 | 113 | "adapter_spread/ref", |
never@2895 | 114 | "adapter_spread/byte", |
never@2895 | 115 | "adapter_spread/char", |
never@2895 | 116 | "adapter_spread/short", |
never@2895 | 117 | "adapter_spread/int", |
never@2895 | 118 | "adapter_spread/long", |
never@2895 | 119 | "adapter_spread/float", |
never@2895 | 120 | "adapter_spread/double", |
never@2895 | 121 | |
never@2895 | 122 | // blocking filter/collect conversions: |
never@2895 | 123 | "adapter_collect/ref", |
never@2895 | 124 | "adapter_collect/int", |
never@2895 | 125 | "adapter_collect/long", |
never@2895 | 126 | "adapter_collect/float", |
never@2895 | 127 | "adapter_collect/double", |
never@2895 | 128 | "adapter_collect/void", |
never@2895 | 129 | "adapter_collect/0/ref", |
never@2895 | 130 | "adapter_collect/1/ref", |
never@2895 | 131 | "adapter_collect/2/ref", |
never@2895 | 132 | "adapter_collect/3/ref", |
never@2895 | 133 | "adapter_collect/4/ref", |
never@2895 | 134 | "adapter_collect/5/ref", |
never@2895 | 135 | "adapter_filter/S0/ref", |
never@2895 | 136 | "adapter_filter/S1/ref", |
never@2895 | 137 | "adapter_filter/S2/ref", |
never@2895 | 138 | "adapter_filter/S3/ref", |
never@2895 | 139 | "adapter_filter/S4/ref", |
never@2895 | 140 | "adapter_filter/S5/ref", |
never@2895 | 141 | "adapter_collect/2/S0/ref", |
never@2895 | 142 | "adapter_collect/2/S1/ref", |
never@2895 | 143 | "adapter_collect/2/S2/ref", |
never@2895 | 144 | "adapter_collect/2/S3/ref", |
never@2895 | 145 | "adapter_collect/2/S4/ref", |
never@2895 | 146 | "adapter_collect/2/S5/ref", |
never@2895 | 147 | |
never@2895 | 148 | // blocking fold conversions: |
never@2895 | 149 | "adapter_fold/ref", |
never@2895 | 150 | "adapter_fold/int", |
never@2895 | 151 | "adapter_fold/long", |
never@2895 | 152 | "adapter_fold/float", |
never@2895 | 153 | "adapter_fold/double", |
never@2895 | 154 | "adapter_fold/void", |
never@2895 | 155 | "adapter_fold/1/ref", |
never@2895 | 156 | "adapter_fold/2/ref", |
never@2895 | 157 | "adapter_fold/3/ref", |
never@2895 | 158 | "adapter_fold/4/ref", |
never@2895 | 159 | "adapter_fold/5/ref", |
jrose@1145 | 160 | |
never@3105 | 161 | "adapter_opt_profiling", |
never@3105 | 162 | |
jrose@1145 | 163 | NULL |
jrose@1145 | 164 | }; |
jrose@1145 | 165 | |
twisti@1734 | 166 | // Adapters. |
never@2950 | 167 | MethodHandlesAdapterBlob* MethodHandles::_adapter_code = NULL; |
twisti@1734 | 168 | |
jrose@1474 | 169 | jobject MethodHandles::_raise_exception_method; |
jrose@1474 | 170 | |
never@2895 | 171 | address MethodHandles::_adapter_return_handlers[CONV_TYPE_MASK+1]; |
never@2895 | 172 | |
jrose@1145 | 173 | #ifdef ASSERT |
jrose@1145 | 174 | bool MethodHandles::spot_check_entry_names() { |
jrose@1145 | 175 | assert(!strcmp(entry_name(_invokestatic_mh), "invokestatic"), ""); |
jrose@1145 | 176 | assert(!strcmp(entry_name(_bound_ref_mh), "bound_ref"), ""); |
jrose@1145 | 177 | assert(!strcmp(entry_name(_adapter_retype_only), "adapter_retype_only"), ""); |
never@2895 | 178 | assert(!strcmp(entry_name(_adapter_fold_args), "adapter_fold_args"), ""); |
jrose@1145 | 179 | assert(!strcmp(entry_name(_adapter_opt_unboxi), "adapter_ref_to_prim/unboxi"), ""); |
never@2895 | 180 | assert(!strcmp(entry_name(_adapter_opt_spread_char), "adapter_spread/char"), ""); |
never@2895 | 181 | assert(!strcmp(entry_name(_adapter_opt_spread_double), "adapter_spread/double"), ""); |
never@2895 | 182 | assert(!strcmp(entry_name(_adapter_opt_collect_int), "adapter_collect/int"), ""); |
never@2895 | 183 | assert(!strcmp(entry_name(_adapter_opt_collect_0_ref), "adapter_collect/0/ref"), ""); |
never@2895 | 184 | assert(!strcmp(entry_name(_adapter_opt_collect_2_S3_ref), "adapter_collect/2/S3/ref"), ""); |
never@2895 | 185 | assert(!strcmp(entry_name(_adapter_opt_filter_S5_ref), "adapter_filter/S5/ref"), ""); |
never@2895 | 186 | assert(!strcmp(entry_name(_adapter_opt_fold_3_ref), "adapter_fold/3/ref"), ""); |
never@2895 | 187 | assert(!strcmp(entry_name(_adapter_opt_fold_void), "adapter_fold/void"), ""); |
jrose@1145 | 188 | return true; |
jrose@1145 | 189 | } |
jrose@1145 | 190 | #endif |
jrose@1145 | 191 | |
twisti@1734 | 192 | |
twisti@1734 | 193 | //------------------------------------------------------------------------------ |
twisti@1734 | 194 | // MethodHandles::generate_adapters |
twisti@1734 | 195 | // |
twisti@2436 | 196 | void MethodHandles::generate_adapters() { |
never@2895 | 197 | #ifdef TARGET_ARCH_NYI_6939861 |
never@2895 | 198 | if (FLAG_IS_DEFAULT(UseRicochetFrames)) UseRicochetFrames = false; |
never@2895 | 199 | #endif |
twisti@2698 | 200 | if (!EnableInvokeDynamic || SystemDictionary::MethodHandle_klass() == NULL) return; |
twisti@1734 | 201 | |
twisti@1734 | 202 | assert(_adapter_code == NULL, "generate only once"); |
twisti@1734 | 203 | |
twisti@1734 | 204 | ResourceMark rm; |
twisti@1734 | 205 | TraceTime timer("MethodHandles adapters generation", TraceStartupTime); |
never@2950 | 206 | _adapter_code = MethodHandlesAdapterBlob::create(adapter_code_size); |
twisti@1734 | 207 | if (_adapter_code == NULL) |
never@2950 | 208 | vm_exit_out_of_memory(adapter_code_size, "CodeCache: no room for MethodHandles adapters"); |
never@3255 | 209 | { |
never@3255 | 210 | CodeBuffer code(_adapter_code); |
never@3255 | 211 | MethodHandlesAdapterGenerator g(&code); |
never@3255 | 212 | g.generate(); |
never@3255 | 213 | code.log_section_sizes("MethodHandlesAdapterBlob"); |
never@3255 | 214 | } |
twisti@1734 | 215 | } |
twisti@1734 | 216 | |
twisti@1734 | 217 | //------------------------------------------------------------------------------ |
twisti@1734 | 218 | // MethodHandlesAdapterGenerator::generate |
twisti@1734 | 219 | // |
twisti@2436 | 220 | void MethodHandlesAdapterGenerator::generate() { |
twisti@1734 | 221 | // Generate generic method handle adapters. |
twisti@1734 | 222 | for (MethodHandles::EntryKind ek = MethodHandles::_EK_FIRST; |
twisti@1734 | 223 | ek < MethodHandles::_EK_LIMIT; |
twisti@1734 | 224 | ek = MethodHandles::EntryKind(1 + (int)ek)) { |
never@2895 | 225 | if (MethodHandles::ek_supported(ek)) { |
never@2895 | 226 | StubCodeMark mark(this, "MethodHandle", MethodHandles::entry_name(ek)); |
never@2895 | 227 | MethodHandles::generate_method_handle_stub(_masm, ek); |
never@2895 | 228 | } |
twisti@1734 | 229 | } |
twisti@1734 | 230 | } |
twisti@1734 | 231 | |
twisti@1734 | 232 | |
never@2895 | 233 | #ifdef TARGET_ARCH_NYI_6939861 |
never@2895 | 234 | // these defs belong in methodHandles_<arch>.cpp |
never@2895 | 235 | frame MethodHandles::ricochet_frame_sender(const frame& fr, RegisterMap *map) { |
never@2895 | 236 | ShouldNotCallThis(); |
never@2895 | 237 | return fr; |
never@2895 | 238 | } |
never@2895 | 239 | void MethodHandles::ricochet_frame_oops_do(const frame& fr, OopClosure* f, const RegisterMap* reg_map) { |
never@2895 | 240 | ShouldNotCallThis(); |
never@2895 | 241 | } |
never@2895 | 242 | #endif //TARGET_ARCH_NYI_6939861 |
never@2895 | 243 | |
never@2895 | 244 | |
never@2895 | 245 | //------------------------------------------------------------------------------ |
never@2895 | 246 | // MethodHandles::ek_supported |
never@2895 | 247 | // |
never@2895 | 248 | bool MethodHandles::ek_supported(MethodHandles::EntryKind ek) { |
never@2895 | 249 | MethodHandles::EntryKind ek_orig = MethodHandles::ek_original_kind(ek); |
never@2895 | 250 | switch (ek_orig) { |
never@2895 | 251 | case _adapter_unused_13: |
never@2895 | 252 | return false; // not defined yet |
never@2895 | 253 | case _adapter_prim_to_ref: |
never@2895 | 254 | return UseRicochetFrames && conv_op_supported(java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF); |
never@2895 | 255 | case _adapter_collect_args: |
never@2895 | 256 | return UseRicochetFrames && conv_op_supported(java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS); |
never@2895 | 257 | case _adapter_fold_args: |
never@2895 | 258 | return UseRicochetFrames && conv_op_supported(java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS); |
never@2895 | 259 | case _adapter_opt_return_any: |
never@2895 | 260 | return UseRicochetFrames; |
never@2895 | 261 | #ifdef TARGET_ARCH_NYI_6939861 |
never@2895 | 262 | // ports before 6939861 supported only three kinds of spread ops |
never@2895 | 263 | case _adapter_spread_args: |
never@2895 | 264 | // restrict spreads to three kinds: |
never@2895 | 265 | switch (ek) { |
never@2895 | 266 | case _adapter_opt_spread_0: |
never@2895 | 267 | case _adapter_opt_spread_1: |
never@2895 | 268 | case _adapter_opt_spread_more: |
never@2895 | 269 | break; |
never@2895 | 270 | default: |
never@2895 | 271 | return false; |
never@2895 | 272 | break; |
never@2895 | 273 | } |
never@2895 | 274 | break; |
never@2895 | 275 | #endif //TARGET_ARCH_NYI_6939861 |
never@2895 | 276 | } |
never@2895 | 277 | return true; |
never@2895 | 278 | } |
never@2895 | 279 | |
never@2895 | 280 | |
jrose@1145 | 281 | void MethodHandles::set_enabled(bool z) { |
jrose@1145 | 282 | if (_enabled != z) { |
twisti@2698 | 283 | guarantee(z && EnableInvokeDynamic, "can only enable once, and only if -XX:+EnableInvokeDynamic"); |
jrose@1145 | 284 | _enabled = z; |
jrose@1145 | 285 | } |
jrose@1145 | 286 | } |
jrose@1145 | 287 | |
jrose@1145 | 288 | // Note: A method which does not have a TRAPS argument cannot block in the GC |
jrose@1145 | 289 | // or throw exceptions. Such methods are used in this file to do something quick |
jrose@1145 | 290 | // and local, like parse a data structure. For speed, such methods work on plain |
jrose@1145 | 291 | // oops, not handles. Trapping methods uniformly operate on handles. |
jrose@1145 | 292 | |
twisti@2806 | 293 | methodHandle MethodHandles::decode_vmtarget(oop vmtarget, int vmindex, oop mtype, |
twisti@2806 | 294 | KlassHandle& receiver_limit_result, int& decode_flags_result) { |
twisti@2806 | 295 | if (vmtarget == NULL) return methodHandle(); |
jrose@1145 | 296 | assert(methodOopDesc::nonvirtual_vtable_index < 0, "encoding"); |
jrose@1145 | 297 | if (vmindex < 0) { |
jrose@1145 | 298 | // this DMH performs no dispatch; it is directly bound to a methodOop |
jrose@1145 | 299 | // A MemberName may either be directly bound to a methodOop, |
jrose@1145 | 300 | // or it may use the klass/index form; both forms mean the same thing. |
jrose@1145 | 301 | methodOop m = decode_methodOop(methodOop(vmtarget), decode_flags_result); |
jrose@1145 | 302 | if ((decode_flags_result & _dmf_has_receiver) != 0 |
jrose@2639 | 303 | && java_lang_invoke_MethodType::is_instance(mtype)) { |
jrose@1145 | 304 | // Extract receiver type restriction from mtype.ptypes[0]. |
jrose@2639 | 305 | objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(mtype); |
jrose@1145 | 306 | oop ptype0 = (ptypes == NULL || ptypes->length() < 1) ? oop(NULL) : ptypes->obj_at(0); |
jrose@1145 | 307 | if (java_lang_Class::is_instance(ptype0)) |
jrose@1145 | 308 | receiver_limit_result = java_lang_Class::as_klassOop(ptype0); |
jrose@1145 | 309 | } |
jrose@1145 | 310 | if (vmindex == methodOopDesc::nonvirtual_vtable_index) { |
jrose@1145 | 311 | // this DMH can be an "invokespecial" version |
jrose@1145 | 312 | decode_flags_result &= ~_dmf_does_dispatch; |
jrose@1145 | 313 | } else { |
jrose@1145 | 314 | assert(vmindex == methodOopDesc::invalid_vtable_index, "random vmindex?"); |
jrose@1145 | 315 | } |
jrose@1145 | 316 | return m; |
jrose@1145 | 317 | } else { |
twisti@1573 | 318 | assert(vmtarget->is_klass(), "must be class or interface"); |
jrose@1145 | 319 | decode_flags_result |= MethodHandles::_dmf_does_dispatch; |
twisti@1573 | 320 | decode_flags_result |= MethodHandles::_dmf_has_receiver; |
jrose@1145 | 321 | receiver_limit_result = (klassOop)vmtarget; |
jrose@1145 | 322 | Klass* tk = Klass::cast((klassOop)vmtarget); |
jrose@1145 | 323 | if (tk->is_interface()) { |
jrose@1145 | 324 | // an itable linkage is <interface, itable index> |
jrose@1145 | 325 | decode_flags_result |= MethodHandles::_dmf_from_interface; |
jrose@1145 | 326 | return klassItable::method_for_itable_index((klassOop)vmtarget, vmindex); |
jrose@1145 | 327 | } else { |
jrose@1145 | 328 | if (!tk->oop_is_instance()) |
never@1577 | 329 | tk = instanceKlass::cast(SystemDictionary::Object_klass()); |
jrose@1145 | 330 | return ((instanceKlass*)tk)->method_at_vtable(vmindex); |
jrose@1145 | 331 | } |
jrose@1145 | 332 | } |
jrose@1145 | 333 | } |
jrose@1145 | 334 | |
jrose@1145 | 335 | // MemberName and DirectMethodHandle have the same linkage to the JVM internals. |
jrose@1145 | 336 | // (MemberName is the non-operational name used for queries and setup.) |
jrose@1145 | 337 | |
twisti@2806 | 338 | methodHandle MethodHandles::decode_DirectMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result) { |
jrose@2639 | 339 | oop vmtarget = java_lang_invoke_DirectMethodHandle::vmtarget(mh); |
jrose@2639 | 340 | int vmindex = java_lang_invoke_DirectMethodHandle::vmindex(mh); |
jrose@2639 | 341 | oop mtype = java_lang_invoke_DirectMethodHandle::type(mh); |
jrose@1145 | 342 | return decode_vmtarget(vmtarget, vmindex, mtype, receiver_limit_result, decode_flags_result); |
jrose@1145 | 343 | } |
jrose@1145 | 344 | |
twisti@2806 | 345 | methodHandle MethodHandles::decode_BoundMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result) { |
jrose@2639 | 346 | assert(java_lang_invoke_BoundMethodHandle::is_instance(mh), ""); |
jrose@1474 | 347 | assert(mh->klass() != SystemDictionary::AdapterMethodHandle_klass(), ""); |
jrose@1145 | 348 | for (oop bmh = mh;;) { |
jrose@1145 | 349 | // Bound MHs can be stacked to bind several arguments. |
jrose@2639 | 350 | oop target = java_lang_invoke_MethodHandle::vmtarget(bmh); |
twisti@2806 | 351 | if (target == NULL) return methodHandle(); |
jrose@1145 | 352 | decode_flags_result |= MethodHandles::_dmf_binds_argument; |
jrose@1145 | 353 | klassOop tk = target->klass(); |
jrose@1145 | 354 | if (tk == SystemDictionary::BoundMethodHandle_klass()) { |
jrose@1145 | 355 | bmh = target; |
jrose@1145 | 356 | continue; |
jrose@1145 | 357 | } else { |
jrose@2639 | 358 | if (java_lang_invoke_MethodHandle::is_subclass(tk)) { |
jrose@1145 | 359 | //assert(tk == SystemDictionary::DirectMethodHandle_klass(), "end of BMH chain must be DMH"); |
jrose@1145 | 360 | return decode_MethodHandle(target, receiver_limit_result, decode_flags_result); |
jrose@1145 | 361 | } else { |
jrose@1145 | 362 | // Optimized case: binding a receiver to a non-dispatched DMH |
jrose@1145 | 363 | // short-circuits directly to the methodOop. |
jrose@1474 | 364 | // (It might be another argument besides a receiver also.) |
jrose@1145 | 365 | assert(target->is_method(), "must be a simple method"); |
twisti@1573 | 366 | decode_flags_result |= MethodHandles::_dmf_binds_method; |
jrose@1145 | 367 | methodOop m = (methodOop) target; |
twisti@1573 | 368 | if (!m->is_static()) |
twisti@1573 | 369 | decode_flags_result |= MethodHandles::_dmf_has_receiver; |
jrose@1145 | 370 | return m; |
jrose@1145 | 371 | } |
jrose@1145 | 372 | } |
jrose@1145 | 373 | } |
jrose@1145 | 374 | } |
jrose@1145 | 375 | |
twisti@2806 | 376 | methodHandle MethodHandles::decode_AdapterMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result) { |
jrose@1145 | 377 | assert(mh->klass() == SystemDictionary::AdapterMethodHandle_klass(), ""); |
jrose@1145 | 378 | for (oop amh = mh;;) { |
jrose@1145 | 379 | // Adapter MHs can be stacked to convert several arguments. |
jrose@2639 | 380 | int conv_op = adapter_conversion_op(java_lang_invoke_AdapterMethodHandle::conversion(amh)); |
jrose@1145 | 381 | decode_flags_result |= (_dmf_adapter_lsb << conv_op) & _DMF_ADAPTER_MASK; |
jrose@2639 | 382 | oop target = java_lang_invoke_MethodHandle::vmtarget(amh); |
twisti@2806 | 383 | if (target == NULL) return methodHandle(); |
jrose@1145 | 384 | klassOop tk = target->klass(); |
jrose@1145 | 385 | if (tk == SystemDictionary::AdapterMethodHandle_klass()) { |
jrose@1145 | 386 | amh = target; |
jrose@1145 | 387 | continue; |
jrose@1145 | 388 | } else { |
jrose@1145 | 389 | // must be a BMH (which will bind some more arguments) or a DMH (for the final call) |
jrose@1145 | 390 | return MethodHandles::decode_MethodHandle(target, receiver_limit_result, decode_flags_result); |
jrose@1145 | 391 | } |
jrose@1145 | 392 | } |
jrose@1145 | 393 | } |
jrose@1145 | 394 | |
twisti@2806 | 395 | methodHandle MethodHandles::decode_MethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result) { |
twisti@2806 | 396 | if (mh == NULL) return methodHandle(); |
jrose@1145 | 397 | klassOop mhk = mh->klass(); |
jrose@2639 | 398 | assert(java_lang_invoke_MethodHandle::is_subclass(mhk), "must be a MethodHandle"); |
jrose@1145 | 399 | if (mhk == SystemDictionary::DirectMethodHandle_klass()) { |
jrose@1145 | 400 | return decode_DirectMethodHandle(mh, receiver_limit_result, decode_flags_result); |
jrose@1145 | 401 | } else if (mhk == SystemDictionary::BoundMethodHandle_klass()) { |
jrose@1145 | 402 | return decode_BoundMethodHandle(mh, receiver_limit_result, decode_flags_result); |
jrose@1145 | 403 | } else if (mhk == SystemDictionary::AdapterMethodHandle_klass()) { |
jrose@1145 | 404 | return decode_AdapterMethodHandle(mh, receiver_limit_result, decode_flags_result); |
jrose@2639 | 405 | } else if (java_lang_invoke_BoundMethodHandle::is_subclass(mhk)) { |
jrose@1474 | 406 | // could be a JavaMethodHandle (but not an adapter MH) |
jrose@1474 | 407 | return decode_BoundMethodHandle(mh, receiver_limit_result, decode_flags_result); |
jrose@1145 | 408 | } else { |
jrose@1145 | 409 | assert(false, "cannot parse this MH"); |
twisti@2806 | 410 | return methodHandle(); // random MH? |
jrose@1145 | 411 | } |
jrose@1145 | 412 | } |
jrose@1145 | 413 | |
jrose@1145 | 414 | methodOop MethodHandles::decode_methodOop(methodOop m, int& decode_flags_result) { |
jrose@1145 | 415 | assert(m->is_method(), ""); |
jrose@1145 | 416 | if (m->is_static()) { |
jrose@1145 | 417 | // check that signature begins '(L' or '([' (not '(I', '()', etc.) |
coleenp@2497 | 418 | Symbol* sig = m->signature(); |
jrose@1145 | 419 | BasicType recv_bt = char2type(sig->byte_at(1)); |
jrose@1145 | 420 | // Note: recv_bt might be T_ILLEGAL if byte_at(2) is ')' |
jrose@1145 | 421 | assert(sig->byte_at(0) == '(', "must be method sig"); |
twisti@1573 | 422 | // if (recv_bt == T_OBJECT || recv_bt == T_ARRAY) |
twisti@1573 | 423 | // decode_flags_result |= _dmf_has_receiver; |
jrose@1145 | 424 | } else { |
jrose@1145 | 425 | // non-static method |
jrose@1145 | 426 | decode_flags_result |= _dmf_has_receiver; |
jrose@1145 | 427 | if (!m->can_be_statically_bound() && !m->is_initializer()) { |
jrose@1145 | 428 | decode_flags_result |= _dmf_does_dispatch; |
jrose@1145 | 429 | if (Klass::cast(m->method_holder())->is_interface()) |
jrose@1145 | 430 | decode_flags_result |= _dmf_from_interface; |
jrose@1145 | 431 | } |
jrose@1145 | 432 | } |
jrose@1145 | 433 | return m; |
jrose@1145 | 434 | } |
jrose@1145 | 435 | |
jrose@1145 | 436 | |
jrose@1145 | 437 | // A trusted party is handing us a cookie to determine a method. |
jrose@1145 | 438 | // Let's boil it down to the method oop they really want. |
twisti@2806 | 439 | methodHandle MethodHandles::decode_method(oop x, KlassHandle& receiver_limit_result, int& decode_flags_result) { |
jrose@1145 | 440 | decode_flags_result = 0; |
twisti@2806 | 441 | receiver_limit_result = KlassHandle(); |
jrose@1145 | 442 | klassOop xk = x->klass(); |
jrose@1145 | 443 | if (xk == Universe::methodKlassObj()) { |
jrose@1145 | 444 | return decode_methodOop((methodOop) x, decode_flags_result); |
jrose@1145 | 445 | } else if (xk == SystemDictionary::MemberName_klass()) { |
jrose@1145 | 446 | // Note: This only works if the MemberName has already been resolved. |
jrose@1145 | 447 | return decode_MemberName(x, receiver_limit_result, decode_flags_result); |
jrose@2639 | 448 | } else if (java_lang_invoke_MethodHandle::is_subclass(xk)) { |
jrose@1145 | 449 | return decode_MethodHandle(x, receiver_limit_result, decode_flags_result); |
never@1577 | 450 | } else if (xk == SystemDictionary::reflect_Method_klass()) { |
jrose@1145 | 451 | oop clazz = java_lang_reflect_Method::clazz(x); |
jrose@1145 | 452 | int slot = java_lang_reflect_Method::slot(x); |
jrose@1145 | 453 | klassOop k = java_lang_Class::as_klassOop(clazz); |
jrose@1145 | 454 | if (k != NULL && Klass::cast(k)->oop_is_instance()) |
jrose@1145 | 455 | return decode_methodOop(instanceKlass::cast(k)->method_with_idnum(slot), |
jrose@1145 | 456 | decode_flags_result); |
never@1577 | 457 | } else if (xk == SystemDictionary::reflect_Constructor_klass()) { |
jrose@1145 | 458 | oop clazz = java_lang_reflect_Constructor::clazz(x); |
jrose@1145 | 459 | int slot = java_lang_reflect_Constructor::slot(x); |
jrose@1145 | 460 | klassOop k = java_lang_Class::as_klassOop(clazz); |
jrose@1145 | 461 | if (k != NULL && Klass::cast(k)->oop_is_instance()) |
jrose@1145 | 462 | return decode_methodOop(instanceKlass::cast(k)->method_with_idnum(slot), |
jrose@1145 | 463 | decode_flags_result); |
jrose@1145 | 464 | } else { |
jrose@1145 | 465 | // unrecognized object |
jrose@1145 | 466 | assert(!x->is_method(), "already checked"); |
jrose@2639 | 467 | assert(!java_lang_invoke_MemberName::is_instance(x), "already checked"); |
jrose@1145 | 468 | } |
twisti@2806 | 469 | return methodHandle(); |
jrose@1145 | 470 | } |
jrose@1145 | 471 | |
jrose@1145 | 472 | |
jrose@1145 | 473 | int MethodHandles::decode_MethodHandle_stack_pushes(oop mh) { |
jrose@1145 | 474 | if (mh->klass() == SystemDictionary::DirectMethodHandle_klass()) |
jrose@1145 | 475 | return 0; // no push/pop |
jrose@2639 | 476 | int this_vmslots = java_lang_invoke_MethodHandle::vmslots(mh); |
jrose@1145 | 477 | int last_vmslots = 0; |
jrose@1145 | 478 | oop last_mh = mh; |
jrose@1145 | 479 | for (;;) { |
jrose@2639 | 480 | oop target = java_lang_invoke_MethodHandle::vmtarget(last_mh); |
jrose@1145 | 481 | if (target->klass() == SystemDictionary::DirectMethodHandle_klass()) { |
jrose@2639 | 482 | last_vmslots = java_lang_invoke_MethodHandle::vmslots(target); |
jrose@1145 | 483 | break; |
jrose@2639 | 484 | } else if (!java_lang_invoke_MethodHandle::is_instance(target)) { |
jrose@1145 | 485 | // might be klass or method |
jrose@1145 | 486 | assert(target->is_method(), "must get here with a direct ref to method"); |
jrose@1145 | 487 | last_vmslots = methodOop(target)->size_of_parameters(); |
jrose@1145 | 488 | break; |
jrose@1145 | 489 | } |
jrose@1145 | 490 | last_mh = target; |
jrose@1145 | 491 | } |
jrose@1145 | 492 | // If I am called with fewer VM slots than my ultimate callee, |
jrose@1145 | 493 | // it must be that I push the additionally needed slots. |
jrose@1145 | 494 | // Likewise if am called with more VM slots, I will pop them. |
jrose@1145 | 495 | return (last_vmslots - this_vmslots); |
jrose@1145 | 496 | } |
jrose@1145 | 497 | |
jrose@1145 | 498 | |
jrose@1145 | 499 | // MemberName support |
jrose@1145 | 500 | |
jrose@2639 | 501 | // import java_lang_invoke_MemberName.* |
jrose@1145 | 502 | enum { |
jrose@2639 | 503 | IS_METHOD = java_lang_invoke_MemberName::MN_IS_METHOD, |
jrose@2639 | 504 | IS_CONSTRUCTOR = java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR, |
jrose@2639 | 505 | IS_FIELD = java_lang_invoke_MemberName::MN_IS_FIELD, |
jrose@2639 | 506 | IS_TYPE = java_lang_invoke_MemberName::MN_IS_TYPE, |
jrose@2639 | 507 | SEARCH_SUPERCLASSES = java_lang_invoke_MemberName::MN_SEARCH_SUPERCLASSES, |
jrose@2639 | 508 | SEARCH_INTERFACES = java_lang_invoke_MemberName::MN_SEARCH_INTERFACES, |
jrose@1145 | 509 | ALL_KINDS = IS_METHOD | IS_CONSTRUCTOR | IS_FIELD | IS_TYPE, |
jrose@2639 | 510 | VM_INDEX_UNINITIALIZED = java_lang_invoke_MemberName::VM_INDEX_UNINITIALIZED |
jrose@1145 | 511 | }; |
jrose@1145 | 512 | |
jrose@1862 | 513 | Handle MethodHandles::new_MemberName(TRAPS) { |
jrose@1862 | 514 | Handle empty; |
jrose@1862 | 515 | instanceKlassHandle k(THREAD, SystemDictionary::MemberName_klass()); |
jrose@1862 | 516 | if (!k->is_initialized()) k->initialize(CHECK_(empty)); |
jrose@1862 | 517 | return Handle(THREAD, k->allocate_instance(THREAD)); |
jrose@1862 | 518 | } |
jrose@1862 | 519 | |
jrose@1145 | 520 | void MethodHandles::init_MemberName(oop mname_oop, oop target_oop) { |
never@1577 | 521 | if (target_oop->klass() == SystemDictionary::reflect_Field_klass()) { |
jrose@1145 | 522 | oop clazz = java_lang_reflect_Field::clazz(target_oop); // fd.field_holder() |
jrose@1145 | 523 | int slot = java_lang_reflect_Field::slot(target_oop); // fd.index() |
jrose@1145 | 524 | int mods = java_lang_reflect_Field::modifiers(target_oop); |
jrose@1145 | 525 | klassOop k = java_lang_Class::as_klassOop(clazz); |
never@3137 | 526 | int offset = instanceKlass::cast(k)->field_offset(slot); |
jrose@1145 | 527 | init_MemberName(mname_oop, k, accessFlags_from(mods), offset); |
jrose@1145 | 528 | } else { |
twisti@2806 | 529 | KlassHandle receiver_limit; int decode_flags = 0; |
twisti@2806 | 530 | methodHandle m = MethodHandles::decode_method(target_oop, receiver_limit, decode_flags); |
jrose@1145 | 531 | bool do_dispatch = ((decode_flags & MethodHandles::_dmf_does_dispatch) != 0); |
twisti@2806 | 532 | init_MemberName(mname_oop, m(), do_dispatch); |
jrose@1145 | 533 | } |
jrose@1145 | 534 | } |
jrose@1145 | 535 | |
jrose@1145 | 536 | void MethodHandles::init_MemberName(oop mname_oop, methodOop m, bool do_dispatch) { |
jrose@1145 | 537 | int flags = ((m->is_initializer() ? IS_CONSTRUCTOR : IS_METHOD) |
jrose@1145 | 538 | | (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS )); |
jrose@1145 | 539 | oop vmtarget = m; |
jrose@1145 | 540 | int vmindex = methodOopDesc::invalid_vtable_index; // implies no info yet |
jrose@1145 | 541 | if (!do_dispatch || (flags & IS_CONSTRUCTOR) || m->can_be_statically_bound()) |
jrose@1145 | 542 | vmindex = methodOopDesc::nonvirtual_vtable_index; // implies never any dispatch |
jrose@1145 | 543 | assert(vmindex != VM_INDEX_UNINITIALIZED, "Java sentinel value"); |
jrose@2639 | 544 | java_lang_invoke_MemberName::set_vmtarget(mname_oop, vmtarget); |
jrose@2639 | 545 | java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); |
jrose@2639 | 546 | java_lang_invoke_MemberName::set_flags(mname_oop, flags); |
jrose@2639 | 547 | java_lang_invoke_MemberName::set_clazz(mname_oop, Klass::cast(m->method_holder())->java_mirror()); |
jrose@1145 | 548 | } |
jrose@1145 | 549 | |
jrose@1145 | 550 | void MethodHandles::init_MemberName(oop mname_oop, klassOop field_holder, AccessFlags mods, int offset) { |
jrose@1145 | 551 | int flags = (IS_FIELD | (jushort)( mods.as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS )); |
jrose@1145 | 552 | oop vmtarget = field_holder; |
jrose@1862 | 553 | int vmindex = offset; // determines the field uniquely when combined with static bit |
jrose@1145 | 554 | assert(vmindex != VM_INDEX_UNINITIALIZED, "bad alias on vmindex"); |
jrose@2639 | 555 | java_lang_invoke_MemberName::set_vmtarget(mname_oop, vmtarget); |
jrose@2639 | 556 | java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); |
jrose@2639 | 557 | java_lang_invoke_MemberName::set_flags(mname_oop, flags); |
jrose@2639 | 558 | java_lang_invoke_MemberName::set_clazz(mname_oop, Klass::cast(field_holder)->java_mirror()); |
jrose@1145 | 559 | } |
jrose@1145 | 560 | |
jrose@1145 | 561 | |
twisti@2806 | 562 | methodHandle MethodHandles::decode_MemberName(oop mname, KlassHandle& receiver_limit_result, int& decode_flags_result) { |
twisti@2806 | 563 | methodHandle empty; |
jrose@2639 | 564 | int flags = java_lang_invoke_MemberName::flags(mname); |
twisti@2806 | 565 | if ((flags & (IS_METHOD | IS_CONSTRUCTOR)) == 0) return empty; // not invocable |
jrose@2639 | 566 | oop vmtarget = java_lang_invoke_MemberName::vmtarget(mname); |
jrose@2639 | 567 | int vmindex = java_lang_invoke_MemberName::vmindex(mname); |
twisti@2806 | 568 | if (vmindex == VM_INDEX_UNINITIALIZED) return empty; // not resolved |
twisti@2806 | 569 | methodHandle m = decode_vmtarget(vmtarget, vmindex, NULL, receiver_limit_result, decode_flags_result); |
jrose@2639 | 570 | oop clazz = java_lang_invoke_MemberName::clazz(mname); |
jrose@1474 | 571 | if (clazz != NULL && java_lang_Class::is_instance(clazz)) { |
jrose@1474 | 572 | klassOop klass = java_lang_Class::as_klassOop(clazz); |
jrose@1474 | 573 | if (klass != NULL) receiver_limit_result = klass; |
jrose@1474 | 574 | } |
jrose@1474 | 575 | return m; |
jrose@1145 | 576 | } |
jrose@1145 | 577 | |
coleenp@2497 | 578 | // convert the external string or reflective type to an internal signature |
twisti@2806 | 579 | Symbol* MethodHandles::convert_to_signature(oop type_str, bool polymorphic, TRAPS) { |
jrose@2639 | 580 | if (java_lang_invoke_MethodType::is_instance(type_str)) { |
jrose@2639 | 581 | return java_lang_invoke_MethodType::as_signature(type_str, polymorphic, CHECK_NULL); |
coleenp@2497 | 582 | } else if (java_lang_Class::is_instance(type_str)) { |
coleenp@2497 | 583 | return java_lang_Class::as_signature(type_str, false, CHECK_NULL); |
coleenp@2497 | 584 | } else if (java_lang_String::is_instance(type_str)) { |
coleenp@2497 | 585 | if (polymorphic) { |
coleenp@2497 | 586 | return java_lang_String::as_symbol(type_str, CHECK_NULL); |
coleenp@2497 | 587 | } else { |
coleenp@2497 | 588 | return java_lang_String::as_symbol_or_null(type_str); |
coleenp@2497 | 589 | } |
coleenp@2497 | 590 | } else { |
coleenp@2497 | 591 | THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized type", NULL); |
coleenp@2497 | 592 | } |
coleenp@2497 | 593 | } |
coleenp@2497 | 594 | |
jrose@1145 | 595 | // An unresolved member name is a mere symbolic reference. |
jrose@1145 | 596 | // Resolving it plants a vmtarget/vmindex in it, |
jrose@1145 | 597 | // which refers dirctly to JVM internals. |
jrose@1145 | 598 | void MethodHandles::resolve_MemberName(Handle mname, TRAPS) { |
jrose@2639 | 599 | assert(java_lang_invoke_MemberName::is_instance(mname()), ""); |
jrose@1145 | 600 | #ifdef ASSERT |
jrose@1145 | 601 | // If this assert throws, renegotiate the sentinel value used by the Java code, |
jrose@1145 | 602 | // so that it is distinct from any valid vtable index value, and any special |
jrose@1145 | 603 | // values defined in methodOopDesc::VtableIndexFlag. |
jrose@1145 | 604 | // The point of the slop is to give the Java code and the JVM some room |
jrose@1145 | 605 | // to independently specify sentinel values. |
jrose@1145 | 606 | const int sentinel_slop = 10; |
jrose@1145 | 607 | const int sentinel_limit = methodOopDesc::highest_unused_vtable_index_value - sentinel_slop; |
jrose@1145 | 608 | assert(VM_INDEX_UNINITIALIZED < sentinel_limit, "Java sentinel != JVM sentinels"); |
jrose@1145 | 609 | #endif |
jrose@2639 | 610 | if (java_lang_invoke_MemberName::vmindex(mname()) != VM_INDEX_UNINITIALIZED) |
jrose@1145 | 611 | return; // already resolved |
twisti@2806 | 612 | Handle defc_oop(THREAD, java_lang_invoke_MemberName::clazz(mname())); |
twisti@2806 | 613 | Handle name_str(THREAD, java_lang_invoke_MemberName::name( mname())); |
twisti@2806 | 614 | Handle type_str(THREAD, java_lang_invoke_MemberName::type( mname())); |
twisti@2806 | 615 | int flags = java_lang_invoke_MemberName::flags(mname()); |
jrose@1145 | 616 | |
twisti@2806 | 617 | if (defc_oop.is_null() || name_str.is_null() || type_str.is_null()) { |
jrose@1145 | 618 | THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to resolve"); |
jrose@1145 | 619 | } |
twisti@2806 | 620 | |
twisti@2806 | 621 | instanceKlassHandle defc; |
twisti@2806 | 622 | { |
twisti@2806 | 623 | klassOop defc_klassOop = java_lang_Class::as_klassOop(defc_oop()); |
twisti@2806 | 624 | if (defc_klassOop == NULL) return; // a primitive; no resolution possible |
twisti@2806 | 625 | if (!Klass::cast(defc_klassOop)->oop_is_instance()) { |
twisti@2806 | 626 | if (!Klass::cast(defc_klassOop)->oop_is_array()) return; |
twisti@2806 | 627 | defc_klassOop = SystemDictionary::Object_klass(); |
twisti@2806 | 628 | } |
twisti@2806 | 629 | defc = instanceKlassHandle(THREAD, defc_klassOop); |
jrose@1145 | 630 | } |
jrose@1145 | 631 | if (defc.is_null()) { |
jrose@1145 | 632 | THROW_MSG(vmSymbols::java_lang_InternalError(), "primitive class"); |
jrose@1145 | 633 | } |
twisti@2806 | 634 | defc->link_class(CHECK); // possible safepoint |
jrose@1145 | 635 | |
jrose@1145 | 636 | // convert the external string name to an internal symbol |
twisti@2806 | 637 | TempNewSymbol name = java_lang_String::as_symbol_or_null(name_str()); |
coleenp@2497 | 638 | if (name == NULL) return; // no such name |
never@2978 | 639 | if (name == vmSymbols::class_initializer_name()) |
never@2978 | 640 | return; // illegal name |
jrose@1145 | 641 | |
jrose@1863 | 642 | Handle polymorphic_method_type; |
jrose@1863 | 643 | bool polymorphic_signature = false; |
jrose@1863 | 644 | if ((flags & ALL_KINDS) == IS_METHOD && |
twisti@2343 | 645 | (defc() == SystemDictionary::MethodHandle_klass() && |
twisti@2806 | 646 | methodOopDesc::is_method_handle_invoke_name(name))) { |
jrose@1863 | 647 | polymorphic_signature = true; |
twisti@2806 | 648 | } |
jrose@1863 | 649 | |
jrose@1145 | 650 | // convert the external string or reflective type to an internal signature |
twisti@2806 | 651 | TempNewSymbol type = convert_to_signature(type_str(), polymorphic_signature, CHECK); |
twisti@2806 | 652 | if (java_lang_invoke_MethodType::is_instance(type_str()) && polymorphic_signature) { |
twisti@2806 | 653 | polymorphic_method_type = type_str; // preserve exactly |
jrose@1145 | 654 | } |
coleenp@2497 | 655 | if (type == NULL) return; // no such signature exists in the VM |
jrose@1145 | 656 | |
jrose@1145 | 657 | // Time to do the lookup. |
jrose@1145 | 658 | switch (flags & ALL_KINDS) { |
jrose@1145 | 659 | case IS_METHOD: |
jrose@1145 | 660 | { |
jrose@1145 | 661 | CallInfo result; |
jrose@1145 | 662 | { |
jrose@1145 | 663 | EXCEPTION_MARK; |
jrose@1145 | 664 | if ((flags & JVM_ACC_STATIC) != 0) { |
jrose@1145 | 665 | LinkResolver::resolve_static_call(result, |
jrose@1145 | 666 | defc, name, type, KlassHandle(), false, false, THREAD); |
jrose@1145 | 667 | } else if (defc->is_interface()) { |
jrose@1145 | 668 | LinkResolver::resolve_interface_call(result, Handle(), defc, |
jrose@1145 | 669 | defc, name, type, KlassHandle(), false, false, THREAD); |
jrose@1145 | 670 | } else { |
jrose@1145 | 671 | LinkResolver::resolve_virtual_call(result, Handle(), defc, |
jrose@1145 | 672 | defc, name, type, KlassHandle(), false, false, THREAD); |
jrose@1145 | 673 | } |
jrose@1145 | 674 | if (HAS_PENDING_EXCEPTION) { |
jrose@1145 | 675 | CLEAR_PENDING_EXCEPTION; |
jrose@1863 | 676 | break; // go to second chance |
jrose@1145 | 677 | } |
jrose@1145 | 678 | } |
jrose@1145 | 679 | methodHandle m = result.resolved_method(); |
jrose@1145 | 680 | oop vmtarget = NULL; |
jrose@1145 | 681 | int vmindex = methodOopDesc::nonvirtual_vtable_index; |
jrose@1145 | 682 | if (defc->is_interface()) { |
jrose@1145 | 683 | vmindex = klassItable::compute_itable_index(m()); |
jrose@1145 | 684 | assert(vmindex >= 0, ""); |
jrose@1145 | 685 | } else if (result.has_vtable_index()) { |
jrose@1145 | 686 | vmindex = result.vtable_index(); |
jrose@1145 | 687 | assert(vmindex >= 0, ""); |
jrose@1145 | 688 | } |
jrose@1145 | 689 | assert(vmindex != VM_INDEX_UNINITIALIZED, ""); |
jrose@1145 | 690 | if (vmindex < 0) { |
jrose@1145 | 691 | assert(result.is_statically_bound(), ""); |
jrose@1145 | 692 | vmtarget = m(); |
jrose@1145 | 693 | } else { |
jrose@1145 | 694 | vmtarget = result.resolved_klass()->as_klassOop(); |
jrose@1145 | 695 | } |
jrose@1145 | 696 | int mods = (m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS); |
jrose@2639 | 697 | java_lang_invoke_MemberName::set_vmtarget(mname(), vmtarget); |
jrose@2639 | 698 | java_lang_invoke_MemberName::set_vmindex(mname(), vmindex); |
jrose@2639 | 699 | java_lang_invoke_MemberName::set_modifiers(mname(), mods); |
twisti@2806 | 700 | DEBUG_ONLY(KlassHandle junk1; int junk2); |
twisti@2806 | 701 | assert(decode_MemberName(mname(), junk1, junk2) == result.resolved_method(), |
jrose@1145 | 702 | "properly stored for later decoding"); |
jrose@1145 | 703 | return; |
jrose@1145 | 704 | } |
jrose@1145 | 705 | case IS_CONSTRUCTOR: |
jrose@1145 | 706 | { |
jrose@1145 | 707 | CallInfo result; |
jrose@1145 | 708 | { |
jrose@1145 | 709 | EXCEPTION_MARK; |
coleenp@2497 | 710 | if (name == vmSymbols::object_initializer_name()) { |
jrose@1145 | 711 | LinkResolver::resolve_special_call(result, |
jrose@1145 | 712 | defc, name, type, KlassHandle(), false, THREAD); |
jrose@1145 | 713 | } else { |
jrose@1145 | 714 | break; // will throw after end of switch |
jrose@1145 | 715 | } |
jrose@1145 | 716 | if (HAS_PENDING_EXCEPTION) { |
jrose@1145 | 717 | CLEAR_PENDING_EXCEPTION; |
jrose@1145 | 718 | return; |
jrose@1145 | 719 | } |
jrose@1145 | 720 | } |
jrose@1145 | 721 | assert(result.is_statically_bound(), ""); |
jrose@1145 | 722 | methodHandle m = result.resolved_method(); |
jrose@1145 | 723 | oop vmtarget = m(); |
jrose@1145 | 724 | int vmindex = methodOopDesc::nonvirtual_vtable_index; |
jrose@1145 | 725 | int mods = (m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS); |
jrose@2639 | 726 | java_lang_invoke_MemberName::set_vmtarget(mname(), vmtarget); |
jrose@2639 | 727 | java_lang_invoke_MemberName::set_vmindex(mname(), vmindex); |
jrose@2639 | 728 | java_lang_invoke_MemberName::set_modifiers(mname(), mods); |
twisti@2806 | 729 | DEBUG_ONLY(KlassHandle junk1; int junk2); |
twisti@2806 | 730 | assert(decode_MemberName(mname(), junk1, junk2) == result.resolved_method(), |
jrose@1145 | 731 | "properly stored for later decoding"); |
jrose@1145 | 732 | return; |
jrose@1145 | 733 | } |
jrose@1145 | 734 | case IS_FIELD: |
jrose@1145 | 735 | { |
jrose@1145 | 736 | // This is taken from LinkResolver::resolve_field, sans access checks. |
jrose@1145 | 737 | fieldDescriptor fd; // find_field initializes fd if found |
coleenp@2497 | 738 | KlassHandle sel_klass(THREAD, instanceKlass::cast(defc())->find_field(name, type, &fd)); |
jrose@1145 | 739 | // check if field exists; i.e., if a klass containing the field def has been selected |
jrose@1145 | 740 | if (sel_klass.is_null()) return; |
jrose@1145 | 741 | oop vmtarget = sel_klass->as_klassOop(); |
jrose@1145 | 742 | int vmindex = fd.offset(); |
jrose@1145 | 743 | int mods = (fd.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS); |
jrose@1145 | 744 | if (vmindex == VM_INDEX_UNINITIALIZED) break; // should not happen |
jrose@2639 | 745 | java_lang_invoke_MemberName::set_vmtarget(mname(), vmtarget); |
jrose@2639 | 746 | java_lang_invoke_MemberName::set_vmindex(mname(), vmindex); |
jrose@2639 | 747 | java_lang_invoke_MemberName::set_modifiers(mname(), mods); |
jrose@1145 | 748 | return; |
jrose@1145 | 749 | } |
jrose@1863 | 750 | default: |
jrose@1863 | 751 | THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format"); |
jrose@1145 | 752 | } |
jrose@1863 | 753 | |
jrose@1863 | 754 | // Second chance. |
jrose@1863 | 755 | if (polymorphic_method_type.not_null()) { |
jrose@1863 | 756 | // Look on a non-null class loader. |
jrose@1863 | 757 | Handle cur_class_loader; |
jrose@2639 | 758 | const int nptypes = java_lang_invoke_MethodType::ptype_count(polymorphic_method_type()); |
jrose@1863 | 759 | for (int i = 0; i <= nptypes; i++) { |
jrose@1863 | 760 | oop type_mirror; |
jrose@2639 | 761 | if (i < nptypes) type_mirror = java_lang_invoke_MethodType::ptype(polymorphic_method_type(), i); |
jrose@2639 | 762 | else type_mirror = java_lang_invoke_MethodType::rtype(polymorphic_method_type()); |
jrose@1863 | 763 | klassOop example_type = java_lang_Class::as_klassOop(type_mirror); |
jrose@1863 | 764 | if (example_type == NULL) continue; |
jrose@1863 | 765 | oop class_loader = Klass::cast(example_type)->class_loader(); |
jrose@1863 | 766 | if (class_loader == NULL || class_loader == cur_class_loader()) continue; |
jrose@1863 | 767 | cur_class_loader = Handle(THREAD, class_loader); |
jrose@1863 | 768 | methodOop m = SystemDictionary::find_method_handle_invoke(name, |
jrose@1863 | 769 | type, |
jrose@1863 | 770 | KlassHandle(THREAD, example_type), |
jrose@1863 | 771 | THREAD); |
jrose@1863 | 772 | if (HAS_PENDING_EXCEPTION) { |
jrose@1863 | 773 | CLEAR_PENDING_EXCEPTION; |
jrose@1863 | 774 | m = NULL; |
jrose@1863 | 775 | // try again with a different class loader... |
jrose@1863 | 776 | } |
jrose@2982 | 777 | if (m != NULL && |
jrose@2982 | 778 | m->is_method_handle_invoke() && |
jrose@2982 | 779 | java_lang_invoke_MethodType::equals(polymorphic_method_type(), m->method_handle_type())) { |
jrose@1863 | 780 | int mods = (m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS); |
jrose@2639 | 781 | java_lang_invoke_MemberName::set_vmtarget(mname(), m); |
jrose@2639 | 782 | java_lang_invoke_MemberName::set_vmindex(mname(), m->vtable_index()); |
jrose@2639 | 783 | java_lang_invoke_MemberName::set_modifiers(mname(), mods); |
jrose@1863 | 784 | return; |
jrose@1863 | 785 | } |
jrose@1863 | 786 | } |
jrose@1863 | 787 | } |
jrose@1145 | 788 | } |
jrose@1145 | 789 | |
jrose@1145 | 790 | // Conversely, a member name which is only initialized from JVM internals |
jrose@1145 | 791 | // may have null defc, name, and type fields. |
jrose@1145 | 792 | // Resolving it plants a vmtarget/vmindex in it, |
jrose@1145 | 793 | // which refers directly to JVM internals. |
jrose@1145 | 794 | void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) { |
jrose@2639 | 795 | assert(java_lang_invoke_MemberName::is_instance(mname()), ""); |
jrose@2639 | 796 | oop vmtarget = java_lang_invoke_MemberName::vmtarget(mname()); |
jrose@2639 | 797 | int vmindex = java_lang_invoke_MemberName::vmindex(mname()); |
jrose@1145 | 798 | if (vmtarget == NULL || vmindex == VM_INDEX_UNINITIALIZED) { |
jrose@1145 | 799 | THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand"); |
jrose@1145 | 800 | } |
jrose@1145 | 801 | |
jrose@2639 | 802 | bool have_defc = (java_lang_invoke_MemberName::clazz(mname()) != NULL); |
jrose@2639 | 803 | bool have_name = (java_lang_invoke_MemberName::name(mname()) != NULL); |
jrose@2639 | 804 | bool have_type = (java_lang_invoke_MemberName::type(mname()) != NULL); |
jrose@2639 | 805 | int flags = java_lang_invoke_MemberName::flags(mname()); |
jrose@1145 | 806 | |
jrose@1145 | 807 | if (suppress != 0) { |
jrose@1145 | 808 | if (suppress & _suppress_defc) have_defc = true; |
jrose@1145 | 809 | if (suppress & _suppress_name) have_name = true; |
jrose@1145 | 810 | if (suppress & _suppress_type) have_type = true; |
jrose@1145 | 811 | } |
jrose@1145 | 812 | |
jrose@1145 | 813 | if (have_defc && have_name && have_type) return; // nothing needed |
jrose@1145 | 814 | |
jrose@1145 | 815 | switch (flags & ALL_KINDS) { |
jrose@1145 | 816 | case IS_METHOD: |
jrose@1145 | 817 | case IS_CONSTRUCTOR: |
jrose@1145 | 818 | { |
twisti@2806 | 819 | KlassHandle receiver_limit; int decode_flags = 0; |
twisti@2806 | 820 | methodHandle m = decode_vmtarget(vmtarget, vmindex, NULL, receiver_limit, decode_flags); |
jrose@1145 | 821 | if (m.is_null()) break; |
jrose@1145 | 822 | if (!have_defc) { |
jrose@1145 | 823 | klassOop defc = m->method_holder(); |
twisti@2806 | 824 | if (receiver_limit.not_null() && receiver_limit() != defc |
twisti@2806 | 825 | && Klass::cast(receiver_limit())->is_subtype_of(defc)) |
twisti@2806 | 826 | defc = receiver_limit(); |
jrose@2639 | 827 | java_lang_invoke_MemberName::set_clazz(mname(), Klass::cast(defc)->java_mirror()); |
jrose@1145 | 828 | } |
jrose@1145 | 829 | if (!have_name) { |
jrose@1145 | 830 | //not java_lang_String::create_from_symbol; let's intern member names |
jrose@1145 | 831 | Handle name = StringTable::intern(m->name(), CHECK); |
jrose@2639 | 832 | java_lang_invoke_MemberName::set_name(mname(), name()); |
jrose@1145 | 833 | } |
jrose@1145 | 834 | if (!have_type) { |
jrose@1145 | 835 | Handle type = java_lang_String::create_from_symbol(m->signature(), CHECK); |
jrose@2639 | 836 | java_lang_invoke_MemberName::set_type(mname(), type()); |
jrose@1145 | 837 | } |
jrose@1145 | 838 | return; |
jrose@1145 | 839 | } |
jrose@1145 | 840 | case IS_FIELD: |
jrose@1145 | 841 | { |
jrose@1145 | 842 | // This is taken from LinkResolver::resolve_field, sans access checks. |
jrose@1145 | 843 | if (!vmtarget->is_klass()) break; |
jrose@1145 | 844 | if (!Klass::cast((klassOop) vmtarget)->oop_is_instance()) break; |
jrose@1145 | 845 | instanceKlassHandle defc(THREAD, (klassOop) vmtarget); |
jrose@1145 | 846 | bool is_static = ((flags & JVM_ACC_STATIC) != 0); |
jrose@1145 | 847 | fieldDescriptor fd; // find_field initializes fd if found |
jrose@1145 | 848 | if (!defc->find_field_from_offset(vmindex, is_static, &fd)) |
jrose@1145 | 849 | break; // cannot expand |
jrose@1145 | 850 | if (!have_defc) { |
jrose@2639 | 851 | java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror()); |
jrose@1145 | 852 | } |
jrose@1145 | 853 | if (!have_name) { |
jrose@1145 | 854 | //not java_lang_String::create_from_symbol; let's intern member names |
jrose@1145 | 855 | Handle name = StringTable::intern(fd.name(), CHECK); |
jrose@2639 | 856 | java_lang_invoke_MemberName::set_name(mname(), name()); |
jrose@1145 | 857 | } |
jrose@1145 | 858 | if (!have_type) { |
jrose@1145 | 859 | Handle type = java_lang_String::create_from_symbol(fd.signature(), CHECK); |
jrose@2639 | 860 | java_lang_invoke_MemberName::set_type(mname(), type()); |
jrose@1145 | 861 | } |
jrose@1145 | 862 | return; |
jrose@1145 | 863 | } |
jrose@1145 | 864 | } |
jrose@1145 | 865 | THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format"); |
jrose@1145 | 866 | } |
jrose@1145 | 867 | |
jrose@1145 | 868 | int MethodHandles::find_MemberNames(klassOop k, |
coleenp@2497 | 869 | Symbol* name, Symbol* sig, |
jrose@1145 | 870 | int mflags, klassOop caller, |
jrose@1145 | 871 | int skip, objArrayOop results) { |
jrose@1145 | 872 | DEBUG_ONLY(No_Safepoint_Verifier nsv); |
jrose@1145 | 873 | // this code contains no safepoints! |
jrose@1145 | 874 | |
jrose@1145 | 875 | // %%% take caller into account! |
jrose@1145 | 876 | |
jrose@1145 | 877 | if (k == NULL || !Klass::cast(k)->oop_is_instance()) return -1; |
jrose@1145 | 878 | |
jrose@1145 | 879 | int rfill = 0, rlimit = results->length(), rskip = skip; |
jrose@1145 | 880 | // overflow measurement: |
jrose@1145 | 881 | int overflow = 0, overflow_limit = MAX2(1000, rlimit); |
jrose@1145 | 882 | |
jrose@1145 | 883 | int match_flags = mflags; |
jrose@1145 | 884 | bool search_superc = ((match_flags & SEARCH_SUPERCLASSES) != 0); |
jrose@1145 | 885 | bool search_intfc = ((match_flags & SEARCH_INTERFACES) != 0); |
jrose@1145 | 886 | bool local_only = !(search_superc | search_intfc); |
jrose@1145 | 887 | bool classes_only = false; |
jrose@1145 | 888 | |
jrose@1145 | 889 | if (name != NULL) { |
jrose@1145 | 890 | if (name->utf8_length() == 0) return 0; // a match is not possible |
jrose@1145 | 891 | } |
jrose@1145 | 892 | if (sig != NULL) { |
jrose@1145 | 893 | if (sig->utf8_length() == 0) return 0; // a match is not possible |
jrose@1145 | 894 | if (sig->byte_at(0) == '(') |
jrose@1145 | 895 | match_flags &= ~(IS_FIELD | IS_TYPE); |
jrose@1145 | 896 | else |
jrose@1145 | 897 | match_flags &= ~(IS_CONSTRUCTOR | IS_METHOD); |
jrose@1145 | 898 | } |
jrose@1145 | 899 | |
jrose@1145 | 900 | if ((match_flags & IS_TYPE) != 0) { |
jrose@1145 | 901 | // NYI, and Core Reflection works quite well for this query |
jrose@1145 | 902 | } |
jrose@1145 | 903 | |
jrose@1145 | 904 | if ((match_flags & IS_FIELD) != 0) { |
jrose@1145 | 905 | for (FieldStream st(k, local_only, !search_intfc); !st.eos(); st.next()) { |
jrose@1145 | 906 | if (name != NULL && st.name() != name) |
jrose@1145 | 907 | continue; |
jrose@1145 | 908 | if (sig != NULL && st.signature() != sig) |
jrose@1145 | 909 | continue; |
jrose@1145 | 910 | // passed the filters |
jrose@1145 | 911 | if (rskip > 0) { |
jrose@1145 | 912 | --rskip; |
jrose@1145 | 913 | } else if (rfill < rlimit) { |
jrose@1145 | 914 | oop result = results->obj_at(rfill++); |
jrose@2639 | 915 | if (!java_lang_invoke_MemberName::is_instance(result)) |
jrose@1145 | 916 | return -99; // caller bug! |
jrose@1145 | 917 | MethodHandles::init_MemberName(result, st.klass()->as_klassOop(), st.access_flags(), st.offset()); |
jrose@1145 | 918 | } else if (++overflow >= overflow_limit) { |
jrose@1145 | 919 | match_flags = 0; break; // got tired of looking at overflow |
jrose@1145 | 920 | } |
jrose@1145 | 921 | } |
jrose@1145 | 922 | } |
jrose@1145 | 923 | |
jrose@1145 | 924 | if ((match_flags & (IS_METHOD | IS_CONSTRUCTOR)) != 0) { |
jrose@1145 | 925 | // watch out for these guys: |
coleenp@2497 | 926 | Symbol* init_name = vmSymbols::object_initializer_name(); |
coleenp@2497 | 927 | Symbol* clinit_name = vmSymbols::class_initializer_name(); |
jrose@1145 | 928 | if (name == clinit_name) clinit_name = NULL; // hack for exposing <clinit> |
jrose@1145 | 929 | bool negate_name_test = false; |
jrose@1145 | 930 | // fix name so that it captures the intention of IS_CONSTRUCTOR |
jrose@1145 | 931 | if (!(match_flags & IS_METHOD)) { |
jrose@1145 | 932 | // constructors only |
jrose@1145 | 933 | if (name == NULL) { |
jrose@1145 | 934 | name = init_name; |
jrose@1145 | 935 | } else if (name != init_name) { |
jrose@1145 | 936 | return 0; // no constructors of this method name |
jrose@1145 | 937 | } |
jrose@1145 | 938 | } else if (!(match_flags & IS_CONSTRUCTOR)) { |
jrose@1145 | 939 | // methods only |
jrose@1145 | 940 | if (name == NULL) { |
jrose@1145 | 941 | name = init_name; |
jrose@1145 | 942 | negate_name_test = true; // if we see the name, we *omit* the entry |
jrose@1145 | 943 | } else if (name == init_name) { |
jrose@1145 | 944 | return 0; // no methods of this constructor name |
jrose@1145 | 945 | } |
jrose@1145 | 946 | } else { |
jrose@1145 | 947 | // caller will accept either sort; no need to adjust name |
jrose@1145 | 948 | } |
jrose@1145 | 949 | for (MethodStream st(k, local_only, !search_intfc); !st.eos(); st.next()) { |
jrose@1145 | 950 | methodOop m = st.method(); |
coleenp@2497 | 951 | Symbol* m_name = m->name(); |
jrose@1145 | 952 | if (m_name == clinit_name) |
jrose@1145 | 953 | continue; |
jrose@1145 | 954 | if (name != NULL && ((m_name != name) ^ negate_name_test)) |
jrose@1145 | 955 | continue; |
jrose@1145 | 956 | if (sig != NULL && m->signature() != sig) |
jrose@1145 | 957 | continue; |
jrose@1145 | 958 | // passed the filters |
jrose@1145 | 959 | if (rskip > 0) { |
jrose@1145 | 960 | --rskip; |
jrose@1145 | 961 | } else if (rfill < rlimit) { |
jrose@1145 | 962 | oop result = results->obj_at(rfill++); |
jrose@2639 | 963 | if (!java_lang_invoke_MemberName::is_instance(result)) |
jrose@1145 | 964 | return -99; // caller bug! |
jrose@1145 | 965 | MethodHandles::init_MemberName(result, m, true); |
jrose@1145 | 966 | } else if (++overflow >= overflow_limit) { |
jrose@1145 | 967 | match_flags = 0; break; // got tired of looking at overflow |
jrose@1145 | 968 | } |
jrose@1145 | 969 | } |
jrose@1145 | 970 | } |
jrose@1145 | 971 | |
jrose@1145 | 972 | // return number of elements we at leasted wanted to initialize |
jrose@1145 | 973 | return rfill + overflow; |
jrose@1145 | 974 | } |
jrose@1145 | 975 | |
jrose@1145 | 976 | |
jrose@1862 | 977 | // Decode this java.lang.Class object into an instanceKlass, if possible. |
jrose@1862 | 978 | // Throw IAE if not |
jrose@1862 | 979 | instanceKlassHandle MethodHandles::resolve_instance_klass(oop java_mirror_oop, TRAPS) { |
jrose@1862 | 980 | instanceKlassHandle empty; |
jrose@1862 | 981 | klassOop caller = NULL; |
jrose@1862 | 982 | if (java_lang_Class::is_instance(java_mirror_oop)) { |
jrose@1862 | 983 | caller = java_lang_Class::as_klassOop(java_mirror_oop); |
jrose@1862 | 984 | } |
jrose@1862 | 985 | if (caller == NULL || !Klass::cast(caller)->oop_is_instance()) { |
jrose@1862 | 986 | THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not a class", empty); |
jrose@1862 | 987 | } |
jrose@1862 | 988 | return instanceKlassHandle(THREAD, caller); |
jrose@1862 | 989 | } |
jrose@1862 | 990 | |
jrose@1145 | 991 | |
jrose@1145 | 992 | |
jrose@1145 | 993 | // Decode the vmtarget field of a method handle. |
jrose@1145 | 994 | // Sanitize out methodOops, klassOops, and any other non-Java data. |
jrose@1145 | 995 | // This is for debugging and reflection. |
jrose@1145 | 996 | oop MethodHandles::encode_target(Handle mh, int format, TRAPS) { |
jrose@2639 | 997 | assert(java_lang_invoke_MethodHandle::is_instance(mh()), "must be a MH"); |
jrose@2982 | 998 | if (format == ETF_FORCE_DIRECT_HANDLE || |
jrose@2982 | 999 | format == ETF_COMPILE_DIRECT_HANDLE) { |
jrose@2982 | 1000 | // Internal function for stress testing. |
jrose@2982 | 1001 | Handle mt = java_lang_invoke_MethodHandle::type(mh()); |
jrose@2982 | 1002 | int invocation_count = 10000; |
jrose@2982 | 1003 | TempNewSymbol signature = java_lang_invoke_MethodType::as_signature(mt(), true, CHECK_NULL); |
jrose@2982 | 1004 | bool omit_receiver_argument = true; |
jrose@2982 | 1005 | MethodHandleCompiler mhc(mh, vmSymbols::invoke_name(), signature, invocation_count, omit_receiver_argument, CHECK_NULL); |
jrose@2982 | 1006 | methodHandle m = mhc.compile(CHECK_NULL); |
jrose@2982 | 1007 | if (StressMethodHandleWalk && Verbose || PrintMiscellaneous) { |
jrose@2982 | 1008 | tty->print_cr("MethodHandleNatives.getTarget(%s)", |
jrose@2982 | 1009 | format == ETF_FORCE_DIRECT_HANDLE ? "FORCE_DIRECT" : "COMPILE_DIRECT"); |
jrose@2982 | 1010 | if (Verbose) { |
jrose@2982 | 1011 | m->print_codes(); |
jrose@2982 | 1012 | } |
jrose@2982 | 1013 | } |
jrose@2982 | 1014 | if (StressMethodHandleWalk) { |
jrose@2982 | 1015 | InterpreterOopMap mask; |
jrose@2982 | 1016 | OopMapCache::compute_one_oop_map(m, m->code_size() - 1, &mask); |
jrose@2982 | 1017 | } |
jrose@2982 | 1018 | if ((format == ETF_COMPILE_DIRECT_HANDLE || |
jrose@2982 | 1019 | CompilationPolicy::must_be_compiled(m)) |
jrose@2982 | 1020 | && !instanceKlass::cast(m->method_holder())->is_not_initialized() |
jrose@2982 | 1021 | && CompilationPolicy::can_be_compiled(m)) { |
jrose@2982 | 1022 | // Force compilation |
jrose@2982 | 1023 | CompileBroker::compile_method(m, InvocationEntryBci, |
iveresov@3035 | 1024 | CompilationPolicy::policy()->initial_compile_level(), |
jrose@2982 | 1025 | methodHandle(), 0, "MethodHandleNatives.getTarget", |
jrose@2982 | 1026 | CHECK_NULL); |
jrose@2982 | 1027 | } |
jrose@2982 | 1028 | // Now wrap m in a DirectMethodHandle. |
jrose@2982 | 1029 | instanceKlassHandle dmh_klass(THREAD, SystemDictionary::DirectMethodHandle_klass()); |
jrose@2982 | 1030 | Handle dmh = dmh_klass->allocate_instance_handle(CHECK_NULL); |
jrose@2982 | 1031 | JavaValue ignore_result(T_VOID); |
jrose@2982 | 1032 | Symbol* init_name = vmSymbols::object_initializer_name(); |
jrose@2982 | 1033 | Symbol* init_sig = vmSymbols::notifyGenericMethodType_signature(); |
jrose@2982 | 1034 | JavaCalls::call_special(&ignore_result, dmh, |
jrose@2982 | 1035 | SystemDictionaryHandles::MethodHandle_klass(), init_name, init_sig, |
jrose@2982 | 1036 | java_lang_invoke_MethodHandle::type(mh()), CHECK_NULL); |
jrose@2982 | 1037 | MethodHandles::init_DirectMethodHandle(dmh, m, false, CHECK_NULL); |
jrose@2982 | 1038 | return dmh(); |
jrose@2982 | 1039 | } |
jrose@1145 | 1040 | if (format == ETF_HANDLE_OR_METHOD_NAME) { |
jrose@2639 | 1041 | oop target = java_lang_invoke_MethodHandle::vmtarget(mh()); |
jrose@1145 | 1042 | if (target == NULL) { |
jrose@1145 | 1043 | return NULL; // unformed MH |
jrose@1145 | 1044 | } |
jrose@1145 | 1045 | klassOop tklass = target->klass(); |
never@1577 | 1046 | if (Klass::cast(tklass)->is_subclass_of(SystemDictionary::Object_klass())) { |
jrose@1145 | 1047 | return target; // target is another MH (or something else?) |
jrose@1145 | 1048 | } |
jrose@1145 | 1049 | } |
jrose@1145 | 1050 | if (format == ETF_DIRECT_HANDLE) { |
jrose@1145 | 1051 | oop target = mh(); |
jrose@1145 | 1052 | for (;;) { |
jrose@1145 | 1053 | if (target->klass() == SystemDictionary::DirectMethodHandle_klass()) { |
jrose@1145 | 1054 | return target; |
jrose@1145 | 1055 | } |
jrose@2639 | 1056 | if (!java_lang_invoke_MethodHandle::is_instance(target)){ |
jrose@1145 | 1057 | return NULL; // unformed MH |
jrose@1145 | 1058 | } |
jrose@2639 | 1059 | target = java_lang_invoke_MethodHandle::vmtarget(target); |
jrose@1145 | 1060 | } |
jrose@1145 | 1061 | } |
jrose@1145 | 1062 | // cases of metadata in MH.vmtarget: |
jrose@1145 | 1063 | // - AMH can have methodOop for static invoke with bound receiver |
jrose@1145 | 1064 | // - DMH can have methodOop for static invoke (on variable receiver) |
jrose@1145 | 1065 | // - DMH can have klassOop for dispatched (non-static) invoke |
twisti@2806 | 1066 | KlassHandle receiver_limit; int decode_flags = 0; |
twisti@2806 | 1067 | methodHandle m = decode_MethodHandle(mh(), receiver_limit, decode_flags); |
twisti@2806 | 1068 | if (m.is_null()) return NULL; |
jrose@1145 | 1069 | switch (format) { |
jrose@1145 | 1070 | case ETF_REFLECT_METHOD: |
jrose@1145 | 1071 | // same as jni_ToReflectedMethod: |
jrose@1145 | 1072 | if (m->is_initializer()) { |
jrose@1145 | 1073 | return Reflection::new_constructor(m, THREAD); |
jrose@1145 | 1074 | } else { |
jrose@1145 | 1075 | return Reflection::new_method(m, UseNewReflection, false, THREAD); |
jrose@1145 | 1076 | } |
jrose@1145 | 1077 | |
jrose@1145 | 1078 | case ETF_HANDLE_OR_METHOD_NAME: // method, not handle |
jrose@1145 | 1079 | case ETF_METHOD_NAME: |
jrose@1145 | 1080 | { |
jrose@1145 | 1081 | if (SystemDictionary::MemberName_klass() == NULL) break; |
jrose@1145 | 1082 | instanceKlassHandle mname_klass(THREAD, SystemDictionary::MemberName_klass()); |
jrose@1145 | 1083 | mname_klass->initialize(CHECK_NULL); |
twisti@2806 | 1084 | Handle mname = mname_klass->allocate_instance_handle(CHECK_NULL); // possible safepoint |
jrose@2639 | 1085 | java_lang_invoke_MemberName::set_vmindex(mname(), VM_INDEX_UNINITIALIZED); |
jrose@1145 | 1086 | bool do_dispatch = ((decode_flags & MethodHandles::_dmf_does_dispatch) != 0); |
twisti@2806 | 1087 | init_MemberName(mname(), m(), do_dispatch); |
jrose@1145 | 1088 | expand_MemberName(mname, 0, CHECK_NULL); |
jrose@1145 | 1089 | return mname(); |
jrose@1145 | 1090 | } |
jrose@1145 | 1091 | } |
jrose@1145 | 1092 | |
jrose@1145 | 1093 | // Unknown format code. |
jrose@1145 | 1094 | char msg[50]; |
jrose@1145 | 1095 | jio_snprintf(msg, sizeof(msg), "unknown getTarget format=%d", format); |
jrose@1145 | 1096 | THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), msg); |
jrose@1145 | 1097 | } |
jrose@1145 | 1098 | |
jrose@1474 | 1099 | static const char* always_null_names[] = { |
jrose@1474 | 1100 | "java/lang/Void", |
jrose@1474 | 1101 | "java/lang/Null", |
jrose@1474 | 1102 | //"java/lang/Nothing", |
jrose@1474 | 1103 | "sun/dyn/empty/Empty", |
jrose@2639 | 1104 | "sun/invoke/empty/Empty", |
jrose@1474 | 1105 | NULL |
jrose@1474 | 1106 | }; |
jrose@1474 | 1107 | |
jrose@1474 | 1108 | static bool is_always_null_type(klassOop klass) { |
jrose@2760 | 1109 | if (klass == NULL) return false; // safety |
jrose@1474 | 1110 | if (!Klass::cast(klass)->oop_is_instance()) return false; |
jrose@1474 | 1111 | instanceKlass* ik = instanceKlass::cast(klass); |
jrose@1474 | 1112 | // Must be on the boot class path: |
jrose@1474 | 1113 | if (ik->class_loader() != NULL) return false; |
jrose@1474 | 1114 | // Check the name. |
coleenp@2497 | 1115 | Symbol* name = ik->name(); |
jrose@1474 | 1116 | for (int i = 0; ; i++) { |
jrose@1474 | 1117 | const char* test_name = always_null_names[i]; |
jrose@1474 | 1118 | if (test_name == NULL) break; |
twisti@1573 | 1119 | if (name->equals(test_name)) |
jrose@1474 | 1120 | return true; |
jrose@1474 | 1121 | } |
jrose@1474 | 1122 | return false; |
jrose@1474 | 1123 | } |
jrose@1474 | 1124 | |
jrose@1145 | 1125 | bool MethodHandles::class_cast_needed(klassOop src, klassOop dst) { |
jrose@2760 | 1126 | if (dst == NULL) return true; |
jrose@2760 | 1127 | if (src == NULL) return (dst != SystemDictionary::Object_klass()); |
never@1577 | 1128 | if (src == dst || dst == SystemDictionary::Object_klass()) |
jrose@1145 | 1129 | return false; // quickest checks |
jrose@1145 | 1130 | Klass* srck = Klass::cast(src); |
jrose@1145 | 1131 | Klass* dstk = Klass::cast(dst); |
jrose@1145 | 1132 | if (dstk->is_interface()) { |
jrose@1145 | 1133 | // interface receivers can safely be viewed as untyped, |
jrose@1145 | 1134 | // because interface calls always include a dynamic check |
never@1577 | 1135 | //dstk = Klass::cast(SystemDictionary::Object_klass()); |
jrose@1145 | 1136 | return false; |
jrose@1145 | 1137 | } |
jrose@1145 | 1138 | if (srck->is_interface()) { |
jrose@1145 | 1139 | // interface arguments must be viewed as untyped |
never@1577 | 1140 | //srck = Klass::cast(SystemDictionary::Object_klass()); |
jrose@1145 | 1141 | return true; |
jrose@1145 | 1142 | } |
jrose@1474 | 1143 | if (is_always_null_type(src)) { |
jrose@1474 | 1144 | // some source types are known to be never instantiated; |
jrose@1474 | 1145 | // they represent references which are always null |
jrose@1474 | 1146 | // such null references never fail to convert safely |
jrose@1474 | 1147 | return false; |
jrose@1474 | 1148 | } |
jrose@1145 | 1149 | return !srck->is_subclass_of(dstk->as_klassOop()); |
jrose@1145 | 1150 | } |
jrose@1145 | 1151 | |
jrose@1145 | 1152 | static oop object_java_mirror() { |
never@1577 | 1153 | return Klass::cast(SystemDictionary::Object_klass())->java_mirror(); |
jrose@1145 | 1154 | } |
jrose@1145 | 1155 | |
twisti@2903 | 1156 | bool MethodHandles::is_float_fixed_reinterpretation_cast(BasicType src, BasicType dst) { |
twisti@2903 | 1157 | if (src == T_FLOAT) return dst == T_INT; |
twisti@2903 | 1158 | if (src == T_INT) return dst == T_FLOAT; |
twisti@2903 | 1159 | if (src == T_DOUBLE) return dst == T_LONG; |
twisti@2903 | 1160 | if (src == T_LONG) return dst == T_DOUBLE; |
twisti@2903 | 1161 | return false; |
twisti@2903 | 1162 | } |
twisti@2903 | 1163 | |
jrose@1145 | 1164 | bool MethodHandles::same_basic_type_for_arguments(BasicType src, |
jrose@1145 | 1165 | BasicType dst, |
jrose@1474 | 1166 | bool raw, |
jrose@1145 | 1167 | bool for_return) { |
jrose@1474 | 1168 | if (for_return) { |
jrose@1474 | 1169 | // return values can always be forgotten: |
jrose@1474 | 1170 | if (dst == T_VOID) return true; |
jrose@1474 | 1171 | if (src == T_VOID) return raw && (dst == T_INT); |
jrose@1474 | 1172 | // We allow caller to receive a garbage int, which is harmless. |
jrose@1474 | 1173 | // This trick is pulled by trusted code (see VerifyType.canPassRaw). |
jrose@1474 | 1174 | } |
jrose@1145 | 1175 | assert(src != T_VOID && dst != T_VOID, "should not be here"); |
jrose@1145 | 1176 | if (src == dst) return true; |
jrose@1145 | 1177 | if (type2size[src] != type2size[dst]) return false; |
jrose@2267 | 1178 | if (src == T_OBJECT || dst == T_OBJECT) return false; |
jrose@2267 | 1179 | if (raw) return true; // bitwise reinterpretation; caller guarantees safety |
jrose@1145 | 1180 | // allow reinterpretation casts for integral widening |
jrose@1145 | 1181 | if (is_subword_type(src)) { // subwords can fit in int or other subwords |
jrose@1145 | 1182 | if (dst == T_INT) // any subword fits in an int |
jrose@1145 | 1183 | return true; |
jrose@1145 | 1184 | if (src == T_BOOLEAN) // boolean fits in any subword |
jrose@1145 | 1185 | return is_subword_type(dst); |
jrose@1145 | 1186 | if (src == T_BYTE && dst == T_SHORT) |
jrose@1145 | 1187 | return true; // remaining case: byte fits in short |
jrose@1145 | 1188 | } |
jrose@1145 | 1189 | // allow float/fixed reinterpretation casts |
twisti@2903 | 1190 | if (is_float_fixed_reinterpretation_cast(src, dst)) |
twisti@2903 | 1191 | return true; |
jrose@1145 | 1192 | return false; |
jrose@1145 | 1193 | } |
jrose@1145 | 1194 | |
jrose@1145 | 1195 | const char* MethodHandles::check_method_receiver(methodOop m, |
jrose@1145 | 1196 | klassOop passed_recv_type) { |
jrose@1145 | 1197 | assert(!m->is_static(), "caller resp."); |
jrose@1145 | 1198 | if (passed_recv_type == NULL) |
jrose@1145 | 1199 | return "receiver type is primitive"; |
jrose@1145 | 1200 | if (class_cast_needed(passed_recv_type, m->method_holder())) { |
jrose@1145 | 1201 | Klass* formal = Klass::cast(m->method_holder()); |
jrose@1145 | 1202 | return SharedRuntime::generate_class_cast_message("receiver type", |
jrose@1145 | 1203 | formal->external_name()); |
jrose@1145 | 1204 | } |
jrose@1145 | 1205 | return NULL; // checks passed |
jrose@1145 | 1206 | } |
jrose@1145 | 1207 | |
jrose@1145 | 1208 | // Verify that m's signature can be called type-safely by a method handle |
jrose@1145 | 1209 | // of the given method type 'mtype'. |
jrose@1145 | 1210 | // It takes a TRAPS argument because it must perform symbol lookups. |
jrose@1145 | 1211 | void MethodHandles::verify_method_signature(methodHandle m, |
jrose@1145 | 1212 | Handle mtype, |
jrose@1145 | 1213 | int first_ptype_pos, |
jrose@1145 | 1214 | KlassHandle insert_ptype, |
jrose@1145 | 1215 | TRAPS) { |
jrose@2760 | 1216 | Handle mhi_type; |
jrose@2760 | 1217 | if (m->is_method_handle_invoke()) { |
jrose@2760 | 1218 | // use this more exact typing instead of the symbolic signature: |
jrose@2760 | 1219 | mhi_type = Handle(THREAD, m->method_handle_type()); |
jrose@2760 | 1220 | } |
jrose@2639 | 1221 | objArrayHandle ptypes(THREAD, java_lang_invoke_MethodType::ptypes(mtype())); |
jrose@1145 | 1222 | int pnum = first_ptype_pos; |
jrose@1145 | 1223 | int pmax = ptypes->length(); |
jrose@2760 | 1224 | int anum = 0; // method argument |
jrose@1145 | 1225 | const char* err = NULL; |
coleenp@2497 | 1226 | ResourceMark rm(THREAD); |
jrose@1145 | 1227 | for (SignatureStream ss(m->signature()); !ss.is_done(); ss.next()) { |
jrose@1145 | 1228 | oop ptype_oop = NULL; |
jrose@1145 | 1229 | if (ss.at_return_type()) { |
jrose@1145 | 1230 | if (pnum != pmax) |
jrose@1145 | 1231 | { err = "too many arguments"; break; } |
jrose@2639 | 1232 | ptype_oop = java_lang_invoke_MethodType::rtype(mtype()); |
jrose@1145 | 1233 | } else { |
jrose@1145 | 1234 | if (pnum >= pmax) |
jrose@1145 | 1235 | { err = "not enough arguments"; break; } |
jrose@1145 | 1236 | if (pnum >= 0) |
jrose@1145 | 1237 | ptype_oop = ptypes->obj_at(pnum); |
jrose@1145 | 1238 | else if (insert_ptype.is_null()) |
jrose@1145 | 1239 | ptype_oop = NULL; |
jrose@1145 | 1240 | else |
jrose@1145 | 1241 | ptype_oop = insert_ptype->java_mirror(); |
jrose@1145 | 1242 | pnum += 1; |
jrose@2760 | 1243 | anum += 1; |
jrose@1145 | 1244 | } |
jrose@2760 | 1245 | KlassHandle pklass; |
jrose@2760 | 1246 | BasicType ptype = T_OBJECT; |
jrose@2760 | 1247 | bool have_ptype = false; |
jrose@2760 | 1248 | // missing ptype_oop does not match any non-reference; use Object to report the error |
jrose@2760 | 1249 | pklass = SystemDictionaryHandles::Object_klass(); |
jrose@2760 | 1250 | if (ptype_oop != NULL) { |
jrose@2760 | 1251 | have_ptype = true; |
jrose@2760 | 1252 | klassOop pklass_oop = NULL; |
jrose@2760 | 1253 | ptype = java_lang_Class::as_BasicType(ptype_oop, &pklass_oop); |
jrose@2760 | 1254 | pklass = KlassHandle(THREAD, pklass_oop); |
jrose@2760 | 1255 | } |
jrose@2760 | 1256 | ptype_oop = NULL; //done with this |
jrose@2760 | 1257 | KlassHandle aklass; |
jrose@2760 | 1258 | BasicType atype = ss.type(); |
jrose@2760 | 1259 | if (atype == T_ARRAY) atype = T_OBJECT; // fold all refs to T_OBJECT |
jrose@2760 | 1260 | if (atype == T_OBJECT) { |
jrose@2760 | 1261 | if (!have_ptype) { |
jrose@1145 | 1262 | // null matches any reference |
jrose@1145 | 1263 | continue; |
jrose@1145 | 1264 | } |
jrose@2760 | 1265 | if (mhi_type.is_null()) { |
jrose@2760 | 1266 | // If we fail to resolve types at this point, we will usually throw an error. |
jrose@2760 | 1267 | TempNewSymbol name = ss.as_symbol_or_null(); |
jrose@2760 | 1268 | if (name != NULL) { |
jrose@2760 | 1269 | instanceKlass* mk = instanceKlass::cast(m->method_holder()); |
jrose@2760 | 1270 | Handle loader(THREAD, mk->class_loader()); |
jrose@2760 | 1271 | Handle domain(THREAD, mk->protection_domain()); |
jrose@2760 | 1272 | klassOop aklass_oop = SystemDictionary::resolve_or_null(name, loader, domain, CHECK); |
jrose@2760 | 1273 | if (aklass_oop != NULL) |
jrose@2760 | 1274 | aklass = KlassHandle(THREAD, aklass_oop); |
jrose@2982 | 1275 | if (aklass.is_null() && |
jrose@2982 | 1276 | pklass.not_null() && |
jrose@2982 | 1277 | loader.is_null() && |
jrose@2982 | 1278 | pklass->name() == name) |
jrose@2982 | 1279 | // accept name equivalence here, since that's the best we can do |
jrose@2982 | 1280 | aklass = pklass; |
jrose@2760 | 1281 | } |
jrose@2760 | 1282 | } else { |
jrose@2760 | 1283 | // for method handle invokers we don't look at the name in the signature |
jrose@2760 | 1284 | oop atype_oop; |
jrose@2760 | 1285 | if (ss.at_return_type()) |
jrose@2760 | 1286 | atype_oop = java_lang_invoke_MethodType::rtype(mhi_type()); |
jrose@2760 | 1287 | else |
jrose@2760 | 1288 | atype_oop = java_lang_invoke_MethodType::ptype(mhi_type(), anum-1); |
jrose@2760 | 1289 | klassOop aklass_oop = NULL; |
jrose@2760 | 1290 | atype = java_lang_Class::as_BasicType(atype_oop, &aklass_oop); |
jrose@2760 | 1291 | aklass = KlassHandle(THREAD, aklass_oop); |
jrose@1863 | 1292 | } |
jrose@1145 | 1293 | } |
jrose@1145 | 1294 | if (!ss.at_return_type()) { |
jrose@2760 | 1295 | err = check_argument_type_change(ptype, pklass(), atype, aklass(), anum); |
jrose@1145 | 1296 | } else { |
jrose@2760 | 1297 | err = check_return_type_change(atype, aklass(), ptype, pklass()); // note reversal! |
jrose@1145 | 1298 | } |
jrose@1145 | 1299 | if (err != NULL) break; |
jrose@1145 | 1300 | } |
jrose@1145 | 1301 | |
jrose@1145 | 1302 | if (err != NULL) { |
jrose@2760 | 1303 | #ifndef PRODUCT |
jrose@2760 | 1304 | if (PrintMiscellaneous && (Verbose || WizardMode)) { |
jrose@2760 | 1305 | tty->print("*** verify_method_signature failed: "); |
jrose@2760 | 1306 | java_lang_invoke_MethodType::print_signature(mtype(), tty); |
jrose@2760 | 1307 | tty->cr(); |
jrose@2760 | 1308 | tty->print_cr(" first_ptype_pos = %d, insert_ptype = "UINTX_FORMAT, first_ptype_pos, insert_ptype()); |
jrose@2760 | 1309 | tty->print(" Failing method: "); |
jrose@2760 | 1310 | m->print(); |
jrose@2760 | 1311 | } |
jrose@2760 | 1312 | #endif //PRODUCT |
jrose@1145 | 1313 | THROW_MSG(vmSymbols::java_lang_InternalError(), err); |
jrose@1145 | 1314 | } |
jrose@1145 | 1315 | } |
jrose@1145 | 1316 | |
jrose@1145 | 1317 | // Main routine for verifying the MethodHandle.type of a proposed |
jrose@1145 | 1318 | // direct or bound-direct method handle. |
jrose@1145 | 1319 | void MethodHandles::verify_method_type(methodHandle m, |
jrose@1145 | 1320 | Handle mtype, |
jrose@1145 | 1321 | bool has_bound_recv, |
jrose@1145 | 1322 | KlassHandle bound_recv_type, |
jrose@1145 | 1323 | TRAPS) { |
jrose@1145 | 1324 | bool m_needs_receiver = !m->is_static(); |
jrose@1145 | 1325 | |
jrose@1145 | 1326 | const char* err = NULL; |
jrose@1145 | 1327 | |
jrose@1145 | 1328 | int first_ptype_pos = m_needs_receiver ? 1 : 0; |
jrose@1474 | 1329 | if (has_bound_recv) { |
jrose@1474 | 1330 | first_ptype_pos -= 1; // ptypes do not include the bound argument; start earlier in them |
jrose@1145 | 1331 | if (m_needs_receiver && bound_recv_type.is_null()) |
jrose@1145 | 1332 | { err = "bound receiver is not an object"; goto die; } |
jrose@1145 | 1333 | } |
jrose@1145 | 1334 | |
jrose@1145 | 1335 | if (m_needs_receiver && err == NULL) { |
jrose@2639 | 1336 | objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(mtype()); |
jrose@1145 | 1337 | if (ptypes->length() < first_ptype_pos) |
jrose@1145 | 1338 | { err = "receiver argument is missing"; goto die; } |
jrose@1474 | 1339 | if (has_bound_recv) |
jrose@1145 | 1340 | err = check_method_receiver(m(), bound_recv_type->as_klassOop()); |
jrose@1145 | 1341 | else |
jrose@1474 | 1342 | err = check_method_receiver(m(), java_lang_Class::as_klassOop(ptypes->obj_at(first_ptype_pos-1))); |
jrose@1145 | 1343 | if (err != NULL) goto die; |
jrose@1145 | 1344 | } |
jrose@1145 | 1345 | |
jrose@1145 | 1346 | // Check the other arguments for mistypes. |
jrose@1145 | 1347 | verify_method_signature(m, mtype, first_ptype_pos, bound_recv_type, CHECK); |
jrose@1145 | 1348 | return; |
jrose@1145 | 1349 | |
jrose@1145 | 1350 | die: |
jrose@1145 | 1351 | THROW_MSG(vmSymbols::java_lang_InternalError(), err); |
jrose@1145 | 1352 | } |
jrose@1145 | 1353 | |
jrose@1145 | 1354 | void MethodHandles::verify_vmslots(Handle mh, TRAPS) { |
jrose@1145 | 1355 | // Verify vmslots. |
jrose@2639 | 1356 | int check_slots = argument_slot_count(java_lang_invoke_MethodHandle::type(mh())); |
jrose@2639 | 1357 | if (java_lang_invoke_MethodHandle::vmslots(mh()) != check_slots) { |
jrose@1145 | 1358 | THROW_MSG(vmSymbols::java_lang_InternalError(), "bad vmslots in BMH"); |
jrose@1145 | 1359 | } |
jrose@1145 | 1360 | } |
jrose@1145 | 1361 | |
jrose@1145 | 1362 | void MethodHandles::verify_vmargslot(Handle mh, int argnum, int argslot, TRAPS) { |
jrose@1145 | 1363 | // Verify that argslot points at the given argnum. |
jrose@2639 | 1364 | int check_slot = argument_slot(java_lang_invoke_MethodHandle::type(mh()), argnum); |
jrose@1145 | 1365 | if (argslot != check_slot || argslot < 0) { |
never@2937 | 1366 | ResourceMark rm; |
jrose@1145 | 1367 | const char* fmt = "for argnum of %d, vmargslot is %d, should be %d"; |
jrose@1145 | 1368 | size_t msglen = strlen(fmt) + 3*11 + 1; |
jrose@1145 | 1369 | char* msg = NEW_RESOURCE_ARRAY(char, msglen); |
jrose@1145 | 1370 | jio_snprintf(msg, msglen, fmt, argnum, argslot, check_slot); |
jrose@1145 | 1371 | THROW_MSG(vmSymbols::java_lang_InternalError(), msg); |
jrose@1145 | 1372 | } |
jrose@1145 | 1373 | } |
jrose@1145 | 1374 | |
jrose@1145 | 1375 | // Verify the correspondence between two method types. |
jrose@1145 | 1376 | // Apart from the advertised changes, caller method type X must |
jrose@1145 | 1377 | // be able to invoke the callee method Y type with no violations |
jrose@1145 | 1378 | // of type integrity. |
jrose@1145 | 1379 | // Return NULL if all is well, else a short error message. |
jrose@1145 | 1380 | const char* MethodHandles::check_method_type_change(oop src_mtype, int src_beg, int src_end, |
jrose@1145 | 1381 | int insert_argnum, oop insert_type, |
jrose@1145 | 1382 | int change_argnum, oop change_type, |
jrose@1145 | 1383 | int delete_argnum, |
jrose@1474 | 1384 | oop dst_mtype, int dst_beg, int dst_end, |
jrose@1474 | 1385 | bool raw) { |
jrose@2639 | 1386 | objArrayOop src_ptypes = java_lang_invoke_MethodType::ptypes(src_mtype); |
jrose@2639 | 1387 | objArrayOop dst_ptypes = java_lang_invoke_MethodType::ptypes(dst_mtype); |
jrose@1145 | 1388 | |
jrose@1145 | 1389 | int src_max = src_ptypes->length(); |
jrose@1145 | 1390 | int dst_max = dst_ptypes->length(); |
jrose@1145 | 1391 | |
jrose@1145 | 1392 | if (src_end == -1) src_end = src_max; |
jrose@1145 | 1393 | if (dst_end == -1) dst_end = dst_max; |
jrose@1145 | 1394 | |
jrose@1145 | 1395 | assert(0 <= src_beg && src_beg <= src_end && src_end <= src_max, "oob"); |
jrose@1145 | 1396 | assert(0 <= dst_beg && dst_beg <= dst_end && dst_end <= dst_max, "oob"); |
jrose@1145 | 1397 | |
jrose@1145 | 1398 | // pending actions; set to -1 when done: |
jrose@1145 | 1399 | int ins_idx = insert_argnum, chg_idx = change_argnum, del_idx = delete_argnum; |
jrose@1145 | 1400 | |
jrose@1145 | 1401 | const char* err = NULL; |
jrose@1145 | 1402 | |
jrose@1145 | 1403 | // Walk along each array of parameter types, including a virtual |
jrose@1145 | 1404 | // NULL end marker at the end of each. |
jrose@1145 | 1405 | for (int src_idx = src_beg, dst_idx = dst_beg; |
jrose@1145 | 1406 | (src_idx <= src_end && dst_idx <= dst_end); |
jrose@1145 | 1407 | src_idx++, dst_idx++) { |
jrose@1145 | 1408 | oop src_type = (src_idx == src_end) ? oop(NULL) : src_ptypes->obj_at(src_idx); |
jrose@1145 | 1409 | oop dst_type = (dst_idx == dst_end) ? oop(NULL) : dst_ptypes->obj_at(dst_idx); |
jrose@1145 | 1410 | bool fix_null_src_type = false; |
jrose@1145 | 1411 | |
jrose@1145 | 1412 | // Perform requested edits. |
jrose@1145 | 1413 | if (ins_idx == src_idx) { |
jrose@1145 | 1414 | // note that the inserted guy is never affected by a change or deletion |
jrose@1145 | 1415 | ins_idx = -1; |
jrose@1145 | 1416 | src_type = insert_type; |
jrose@1145 | 1417 | fix_null_src_type = true; |
jrose@1145 | 1418 | --src_idx; // back up to process src type on next loop |
jrose@1145 | 1419 | src_idx = src_end; |
jrose@1145 | 1420 | } else { |
jrose@1145 | 1421 | // note that the changed guy can be immediately deleted |
jrose@1145 | 1422 | if (chg_idx == src_idx) { |
jrose@1145 | 1423 | chg_idx = -1; |
jrose@1145 | 1424 | assert(src_idx < src_end, "oob"); |
jrose@1145 | 1425 | src_type = change_type; |
jrose@1145 | 1426 | fix_null_src_type = true; |
jrose@1145 | 1427 | } |
jrose@1145 | 1428 | if (del_idx == src_idx) { |
jrose@1145 | 1429 | del_idx = -1; |
jrose@1145 | 1430 | assert(src_idx < src_end, "oob"); |
jrose@1145 | 1431 | --dst_idx; |
jrose@1145 | 1432 | continue; // rerun loop after skipping this position |
jrose@1145 | 1433 | } |
jrose@1145 | 1434 | } |
jrose@1145 | 1435 | |
jrose@1145 | 1436 | if (src_type == NULL && fix_null_src_type) |
jrose@1145 | 1437 | // explicit null in this case matches any dest reference |
jrose@1145 | 1438 | src_type = (java_lang_Class::is_primitive(dst_type) ? object_java_mirror() : dst_type); |
jrose@1145 | 1439 | |
jrose@1145 | 1440 | // Compare the two argument types. |
jrose@1145 | 1441 | if (src_type != dst_type) { |
jrose@1145 | 1442 | if (src_type == NULL) return "not enough arguments"; |
jrose@1145 | 1443 | if (dst_type == NULL) return "too many arguments"; |
jrose@1474 | 1444 | err = check_argument_type_change(src_type, dst_type, dst_idx, raw); |
jrose@1145 | 1445 | if (err != NULL) return err; |
jrose@1145 | 1446 | } |
jrose@1145 | 1447 | } |
jrose@1145 | 1448 | |
jrose@1145 | 1449 | // Now compare return types also. |
jrose@2639 | 1450 | oop src_rtype = java_lang_invoke_MethodType::rtype(src_mtype); |
jrose@2639 | 1451 | oop dst_rtype = java_lang_invoke_MethodType::rtype(dst_mtype); |
jrose@1145 | 1452 | if (src_rtype != dst_rtype) { |
jrose@1474 | 1453 | err = check_return_type_change(dst_rtype, src_rtype, raw); // note reversal! |
jrose@1145 | 1454 | if (err != NULL) return err; |
jrose@1145 | 1455 | } |
jrose@1145 | 1456 | |
jrose@1145 | 1457 | assert(err == NULL, ""); |
jrose@1145 | 1458 | return NULL; // all is well |
jrose@1145 | 1459 | } |
jrose@1145 | 1460 | |
jrose@1145 | 1461 | |
jrose@1145 | 1462 | const char* MethodHandles::check_argument_type_change(BasicType src_type, |
jrose@1474 | 1463 | klassOop src_klass, |
jrose@1474 | 1464 | BasicType dst_type, |
jrose@1474 | 1465 | klassOop dst_klass, |
jrose@1474 | 1466 | int argnum, |
jrose@1474 | 1467 | bool raw) { |
jrose@1145 | 1468 | const char* err = NULL; |
twisti@2903 | 1469 | const bool for_return = (argnum < 0); |
jrose@1145 | 1470 | |
jrose@1145 | 1471 | // just in case: |
jrose@1145 | 1472 | if (src_type == T_ARRAY) src_type = T_OBJECT; |
jrose@1145 | 1473 | if (dst_type == T_ARRAY) dst_type = T_OBJECT; |
jrose@1145 | 1474 | |
jrose@1145 | 1475 | // Produce some nice messages if VerifyMethodHandles is turned on: |
jrose@1474 | 1476 | if (!same_basic_type_for_arguments(src_type, dst_type, raw, for_return)) { |
jrose@1145 | 1477 | if (src_type == T_OBJECT) { |
twisti@2903 | 1478 | if (raw && is_java_primitive(dst_type)) |
twisti@2903 | 1479 | return NULL; // ref-to-prim discards ref and returns zero |
twisti@2903 | 1480 | err = (!for_return |
jrose@1145 | 1481 | ? "type mismatch: passing a %s for method argument #%d, which expects primitive %s" |
jrose@1145 | 1482 | : "type mismatch: returning a %s, but caller expects primitive %s"); |
jrose@1145 | 1483 | } else if (dst_type == T_OBJECT) { |
twisti@2903 | 1484 | err = (!for_return |
jrose@1145 | 1485 | ? "type mismatch: passing a primitive %s for method argument #%d, which expects %s" |
jrose@1145 | 1486 | : "type mismatch: returning a primitive %s, but caller expects %s"); |
jrose@1145 | 1487 | } else { |
twisti@2903 | 1488 | err = (!for_return |
jrose@1145 | 1489 | ? "type mismatch: passing a %s for method argument #%d, which expects %s" |
jrose@1145 | 1490 | : "type mismatch: returning a %s, but caller expects %s"); |
jrose@1145 | 1491 | } |
jrose@1474 | 1492 | } else if (src_type == T_OBJECT && dst_type == T_OBJECT && |
jrose@1474 | 1493 | class_cast_needed(src_klass, dst_klass)) { |
jrose@1145 | 1494 | if (!class_cast_needed(dst_klass, src_klass)) { |
jrose@1474 | 1495 | if (raw) |
jrose@1474 | 1496 | return NULL; // reverse cast is OK; the MH target is trusted to enforce it |
twisti@2903 | 1497 | err = (!for_return |
jrose@1145 | 1498 | ? "cast required: passing a %s for method argument #%d, which expects %s" |
jrose@1145 | 1499 | : "cast required: returning a %s, but caller expects %s"); |
jrose@1145 | 1500 | } else { |
twisti@2903 | 1501 | err = (!for_return |
jrose@1145 | 1502 | ? "reference mismatch: passing a %s for method argument #%d, which expects %s" |
jrose@1145 | 1503 | : "reference mismatch: returning a %s, but caller expects %s"); |
jrose@1145 | 1504 | } |
jrose@1145 | 1505 | } else { |
jrose@1145 | 1506 | // passed the obstacle course |
jrose@1145 | 1507 | return NULL; |
jrose@1145 | 1508 | } |
jrose@1145 | 1509 | |
jrose@1145 | 1510 | // format, format, format |
jrose@1145 | 1511 | const char* src_name = type2name(src_type); |
jrose@1145 | 1512 | const char* dst_name = type2name(dst_type); |
jrose@1145 | 1513 | if (src_name == NULL) src_name = "unknown type"; |
jrose@1145 | 1514 | if (dst_name == NULL) dst_name = "unknown type"; |
jrose@2760 | 1515 | if (src_type == T_OBJECT) |
jrose@2760 | 1516 | src_name = (src_klass != NULL) ? Klass::cast(src_klass)->external_name() : "an unresolved class"; |
jrose@2760 | 1517 | if (dst_type == T_OBJECT) |
jrose@2760 | 1518 | dst_name = (dst_klass != NULL) ? Klass::cast(dst_klass)->external_name() : "an unresolved class"; |
jrose@1145 | 1519 | |
jrose@1145 | 1520 | size_t msglen = strlen(err) + strlen(src_name) + strlen(dst_name) + (argnum < 10 ? 1 : 11); |
jrose@1145 | 1521 | char* msg = NEW_RESOURCE_ARRAY(char, msglen + 1); |
twisti@2903 | 1522 | if (!for_return) { |
jrose@1145 | 1523 | assert(strstr(err, "%d") != NULL, ""); |
jrose@1145 | 1524 | jio_snprintf(msg, msglen, err, src_name, argnum, dst_name); |
jrose@1145 | 1525 | } else { |
jrose@1145 | 1526 | assert(strstr(err, "%d") == NULL, ""); |
jrose@1145 | 1527 | jio_snprintf(msg, msglen, err, src_name, dst_name); |
jrose@1145 | 1528 | } |
jrose@1145 | 1529 | return msg; |
jrose@1145 | 1530 | } |
jrose@1145 | 1531 | |
jrose@1145 | 1532 | // Compute the depth within the stack of the given argument, i.e., |
jrose@1145 | 1533 | // the combined size of arguments to the right of the given argument. |
jrose@1145 | 1534 | // For the last argument (ptypes.length-1) this will be zero. |
jrose@1145 | 1535 | // For the first argument (0) this will be the size of all |
jrose@1145 | 1536 | // arguments but that one. For the special number -1, this |
jrose@1145 | 1537 | // will be the size of all arguments, including the first. |
jrose@1145 | 1538 | // If the argument is neither -1 nor a valid argument index, |
jrose@1145 | 1539 | // then return a negative number. Otherwise, the result |
jrose@1145 | 1540 | // is in the range [0..vmslots] inclusive. |
jrose@1145 | 1541 | int MethodHandles::argument_slot(oop method_type, int arg) { |
jrose@2639 | 1542 | objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(method_type); |
jrose@1145 | 1543 | int argslot = 0; |
jrose@1145 | 1544 | int len = ptypes->length(); |
jrose@1145 | 1545 | if (arg < -1 || arg >= len) return -99; |
jrose@1145 | 1546 | for (int i = len-1; i > arg; i--) { |
jrose@1145 | 1547 | BasicType bt = java_lang_Class::as_BasicType(ptypes->obj_at(i)); |
jrose@1145 | 1548 | argslot += type2size[bt]; |
jrose@1145 | 1549 | } |
jrose@1145 | 1550 | assert(argument_slot_to_argnum(method_type, argslot) == arg, "inverse works"); |
jrose@1145 | 1551 | return argslot; |
jrose@1145 | 1552 | } |
jrose@1145 | 1553 | |
jrose@1145 | 1554 | // Given a slot number, return the argument number. |
jrose@1145 | 1555 | int MethodHandles::argument_slot_to_argnum(oop method_type, int query_argslot) { |
jrose@2639 | 1556 | objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(method_type); |
jrose@1145 | 1557 | int argslot = 0; |
jrose@1145 | 1558 | int len = ptypes->length(); |
jrose@1145 | 1559 | for (int i = len-1; i >= 0; i--) { |
jrose@1145 | 1560 | if (query_argslot == argslot) return i; |
jrose@1145 | 1561 | BasicType bt = java_lang_Class::as_BasicType(ptypes->obj_at(i)); |
jrose@1145 | 1562 | argslot += type2size[bt]; |
jrose@1145 | 1563 | } |
jrose@1145 | 1564 | // return pseudo-arg deepest in stack: |
jrose@1145 | 1565 | if (query_argslot == argslot) return -1; |
jrose@1145 | 1566 | return -99; // oob slot, or splitting a double-slot arg |
jrose@1145 | 1567 | } |
jrose@1145 | 1568 | |
jrose@1145 | 1569 | methodHandle MethodHandles::dispatch_decoded_method(methodHandle m, |
jrose@1145 | 1570 | KlassHandle receiver_limit, |
jrose@1145 | 1571 | int decode_flags, |
jrose@1145 | 1572 | KlassHandle receiver_klass, |
jrose@1145 | 1573 | TRAPS) { |
jrose@1145 | 1574 | assert((decode_flags & ~_DMF_DIRECT_MASK) == 0, "must be direct method reference"); |
jrose@1145 | 1575 | assert((decode_flags & _dmf_has_receiver) != 0, "must have a receiver or first reference argument"); |
jrose@1145 | 1576 | |
jrose@1145 | 1577 | if (!m->is_static() && |
jrose@1145 | 1578 | (receiver_klass.is_null() || !receiver_klass->is_subtype_of(m->method_holder()))) |
jrose@1145 | 1579 | // given type does not match class of method, or receiver is null! |
jrose@1145 | 1580 | // caller should have checked this, but let's be extra careful... |
jrose@1145 | 1581 | return methodHandle(); |
jrose@1145 | 1582 | |
jrose@1145 | 1583 | if (receiver_limit.not_null() && |
jrose@1145 | 1584 | (receiver_klass.not_null() && !receiver_klass->is_subtype_of(receiver_limit()))) |
jrose@1145 | 1585 | // given type is not limited to the receiver type |
jrose@1145 | 1586 | // note that a null receiver can match any reference value, for a static method |
jrose@1145 | 1587 | return methodHandle(); |
jrose@1145 | 1588 | |
jrose@1145 | 1589 | if (!(decode_flags & MethodHandles::_dmf_does_dispatch)) { |
jrose@1145 | 1590 | // pre-dispatched or static method (null receiver is OK for static) |
jrose@1145 | 1591 | return m; |
jrose@1145 | 1592 | |
jrose@1145 | 1593 | } else if (receiver_klass.is_null()) { |
jrose@1145 | 1594 | // null receiver value; cannot dispatch |
jrose@1145 | 1595 | return methodHandle(); |
jrose@1145 | 1596 | |
jrose@1145 | 1597 | } else if (!(decode_flags & MethodHandles::_dmf_from_interface)) { |
jrose@1145 | 1598 | // perform virtual dispatch |
jrose@1145 | 1599 | int vtable_index = m->vtable_index(); |
jrose@1145 | 1600 | guarantee(vtable_index >= 0, "valid vtable index"); |
jrose@1145 | 1601 | |
jrose@1145 | 1602 | // receiver_klass might be an arrayKlassOop but all vtables start at |
jrose@1145 | 1603 | // the same place. The cast is to avoid virtual call and assertion. |
jrose@1145 | 1604 | // See also LinkResolver::runtime_resolve_virtual_method. |
jrose@1145 | 1605 | instanceKlass* inst = (instanceKlass*)Klass::cast(receiver_klass()); |
jrose@1145 | 1606 | DEBUG_ONLY(inst->verify_vtable_index(vtable_index)); |
jrose@1145 | 1607 | methodOop m_oop = inst->method_at_vtable(vtable_index); |
jrose@1145 | 1608 | return methodHandle(THREAD, m_oop); |
jrose@1145 | 1609 | |
jrose@1145 | 1610 | } else { |
jrose@1145 | 1611 | // perform interface dispatch |
jrose@1145 | 1612 | int itable_index = klassItable::compute_itable_index(m()); |
jrose@1145 | 1613 | guarantee(itable_index >= 0, "valid itable index"); |
jrose@1145 | 1614 | instanceKlass* inst = instanceKlass::cast(receiver_klass()); |
jrose@1145 | 1615 | methodOop m_oop = inst->method_at_itable(m->method_holder(), itable_index, THREAD); |
jrose@1145 | 1616 | return methodHandle(THREAD, m_oop); |
jrose@1145 | 1617 | } |
jrose@1145 | 1618 | } |
jrose@1145 | 1619 | |
jrose@1145 | 1620 | void MethodHandles::verify_DirectMethodHandle(Handle mh, methodHandle m, TRAPS) { |
jrose@1145 | 1621 | // Verify type. |
jrose@2639 | 1622 | Handle mtype(THREAD, java_lang_invoke_MethodHandle::type(mh())); |
jrose@1145 | 1623 | verify_method_type(m, mtype, false, KlassHandle(), CHECK); |
jrose@1145 | 1624 | |
jrose@1145 | 1625 | // Verify vmslots. |
jrose@2639 | 1626 | if (java_lang_invoke_MethodHandle::vmslots(mh()) != m->size_of_parameters()) { |
jrose@1145 | 1627 | THROW_MSG(vmSymbols::java_lang_InternalError(), "bad vmslots in DMH"); |
jrose@1145 | 1628 | } |
jrose@1145 | 1629 | } |
jrose@1145 | 1630 | |
jrose@1145 | 1631 | void MethodHandles::init_DirectMethodHandle(Handle mh, methodHandle m, bool do_dispatch, TRAPS) { |
jrose@1145 | 1632 | // Check arguments. |
jrose@1145 | 1633 | if (mh.is_null() || m.is_null() || |
jrose@1145 | 1634 | (!do_dispatch && m->is_abstract())) { |
jrose@1145 | 1635 | THROW(vmSymbols::java_lang_InternalError()); |
jrose@1145 | 1636 | } |
jrose@1145 | 1637 | |
jrose@1145 | 1638 | if (VerifyMethodHandles) { |
jrose@1145 | 1639 | // The privileged code which invokes this routine should not make |
jrose@1145 | 1640 | // a mistake about types, but it's better to verify. |
jrose@1145 | 1641 | verify_DirectMethodHandle(mh, m, CHECK); |
jrose@1145 | 1642 | } |
jrose@1145 | 1643 | |
jrose@1145 | 1644 | // Finally, after safety checks are done, link to the target method. |
jrose@1145 | 1645 | // We will follow the same path as the latter part of |
jrose@1145 | 1646 | // InterpreterRuntime::resolve_invoke(), which first finds the method |
jrose@1145 | 1647 | // and then decides how to populate the constant pool cache entry |
jrose@1145 | 1648 | // that links the interpreter calls to the method. We need the same |
jrose@1145 | 1649 | // bits, and will use the same calling sequence code. |
jrose@1145 | 1650 | |
twisti@2806 | 1651 | int vmindex = methodOopDesc::garbage_vtable_index; |
twisti@2806 | 1652 | Handle vmtarget; |
jrose@1145 | 1653 | |
jrose@1145 | 1654 | instanceKlass::cast(m->method_holder())->link_class(CHECK); |
jrose@1145 | 1655 | |
jrose@1145 | 1656 | MethodHandleEntry* me = NULL; |
jrose@1145 | 1657 | if (do_dispatch && Klass::cast(m->method_holder())->is_interface()) { |
jrose@1145 | 1658 | // We are simulating an invokeinterface instruction. |
jrose@1145 | 1659 | // (We might also be simulating an invokevirtual on a miranda method, |
jrose@1145 | 1660 | // but it is safe to treat it as an invokeinterface.) |
jrose@1145 | 1661 | assert(!m->can_be_statically_bound(), "no final methods on interfaces"); |
jrose@1145 | 1662 | vmindex = klassItable::compute_itable_index(m()); |
jrose@1145 | 1663 | assert(vmindex >= 0, "(>=0) == do_dispatch"); |
jrose@1145 | 1664 | // Set up same bits as ConstantPoolCacheEntry::set_interface_call(). |
jrose@1145 | 1665 | vmtarget = m->method_holder(); // the interface |
jrose@1145 | 1666 | me = MethodHandles::entry(MethodHandles::_invokeinterface_mh); |
jrose@1145 | 1667 | } else if (!do_dispatch || m->can_be_statically_bound()) { |
jrose@1145 | 1668 | // We are simulating an invokestatic or invokespecial instruction. |
jrose@1145 | 1669 | // Set up the method pointer, just like ConstantPoolCacheEntry::set_method(). |
twisti@2806 | 1670 | vmtarget = m; |
jrose@1145 | 1671 | // this does not help dispatch, but it will make it possible to parse this MH: |
jrose@1145 | 1672 | vmindex = methodOopDesc::nonvirtual_vtable_index; |
jrose@1145 | 1673 | assert(vmindex < 0, "(>=0) == do_dispatch"); |
jrose@1145 | 1674 | if (!m->is_static()) { |
jrose@1145 | 1675 | me = MethodHandles::entry(MethodHandles::_invokespecial_mh); |
jrose@1145 | 1676 | } else { |
jrose@1145 | 1677 | me = MethodHandles::entry(MethodHandles::_invokestatic_mh); |
jrose@1145 | 1678 | // Part of the semantics of a static call is an initialization barrier. |
jrose@1145 | 1679 | // For a DMH, it is done now, when the handle is created. |
jrose@1145 | 1680 | Klass* k = Klass::cast(m->method_holder()); |
jrose@1145 | 1681 | if (k->should_be_initialized()) { |
twisti@2806 | 1682 | k->initialize(CHECK); // possible safepoint |
jrose@1145 | 1683 | } |
jrose@1145 | 1684 | } |
jrose@1145 | 1685 | } else { |
jrose@1145 | 1686 | // We are simulating an invokevirtual instruction. |
jrose@1145 | 1687 | // Set up the vtable index, just like ConstantPoolCacheEntry::set_method(). |
jrose@1145 | 1688 | // The key logic is LinkResolver::runtime_resolve_virtual_method. |
jrose@1145 | 1689 | vmindex = m->vtable_index(); |
jrose@1145 | 1690 | vmtarget = m->method_holder(); |
jrose@1145 | 1691 | me = MethodHandles::entry(MethodHandles::_invokevirtual_mh); |
jrose@1145 | 1692 | } |
jrose@1145 | 1693 | |
jrose@1145 | 1694 | if (me == NULL) { THROW(vmSymbols::java_lang_InternalError()); } |
jrose@1145 | 1695 | |
twisti@2806 | 1696 | java_lang_invoke_DirectMethodHandle::set_vmtarget(mh(), vmtarget()); |
twisti@2806 | 1697 | java_lang_invoke_DirectMethodHandle::set_vmindex( mh(), vmindex); |
twisti@2806 | 1698 | DEBUG_ONLY(KlassHandle rlimit; int flags); |
twisti@2806 | 1699 | assert(MethodHandles::decode_method(mh(), rlimit, flags) == m, |
jrose@1145 | 1700 | "properly stored for later decoding"); |
jrose@1145 | 1701 | DEBUG_ONLY(bool actual_do_dispatch = ((flags & _dmf_does_dispatch) != 0)); |
jrose@1145 | 1702 | assert(!(actual_do_dispatch && !do_dispatch), |
jrose@1145 | 1703 | "do not perform dispatch if !do_dispatch specified"); |
jrose@1145 | 1704 | assert(actual_do_dispatch == (vmindex >= 0), "proper later decoding of do_dispatch"); |
jrose@1145 | 1705 | assert(decode_MethodHandle_stack_pushes(mh()) == 0, "DMH does not move stack"); |
jrose@1145 | 1706 | |
jrose@1145 | 1707 | // Done! |
jrose@2639 | 1708 | java_lang_invoke_MethodHandle::set_vmentry(mh(), me); |
jrose@1145 | 1709 | } |
jrose@1145 | 1710 | |
jrose@1145 | 1711 | void MethodHandles::verify_BoundMethodHandle_with_receiver(Handle mh, |
jrose@1145 | 1712 | methodHandle m, |
jrose@1145 | 1713 | TRAPS) { |
jrose@1145 | 1714 | // Verify type. |
twisti@2806 | 1715 | KlassHandle bound_recv_type; |
twisti@2806 | 1716 | { |
twisti@2806 | 1717 | oop receiver = java_lang_invoke_BoundMethodHandle::argument(mh()); |
twisti@2806 | 1718 | if (receiver != NULL) |
twisti@2806 | 1719 | bound_recv_type = KlassHandle(THREAD, receiver->klass()); |
twisti@2806 | 1720 | } |
jrose@2639 | 1721 | Handle mtype(THREAD, java_lang_invoke_MethodHandle::type(mh())); |
jrose@1145 | 1722 | verify_method_type(m, mtype, true, bound_recv_type, CHECK); |
jrose@1145 | 1723 | |
jrose@1145 | 1724 | int receiver_pos = m->size_of_parameters() - 1; |
jrose@1145 | 1725 | |
jrose@1145 | 1726 | // Verify MH.vmargslot, which should point at the bound receiver. |
jrose@2639 | 1727 | verify_vmargslot(mh, -1, java_lang_invoke_BoundMethodHandle::vmargslot(mh()), CHECK); |
jrose@1145 | 1728 | //verify_vmslots(mh, CHECK); |
jrose@1145 | 1729 | |
jrose@1145 | 1730 | // Verify vmslots. |
jrose@2639 | 1731 | if (java_lang_invoke_MethodHandle::vmslots(mh()) != receiver_pos) { |
jrose@1145 | 1732 | THROW_MSG(vmSymbols::java_lang_InternalError(), "bad vmslots in BMH (receiver)"); |
jrose@1145 | 1733 | } |
jrose@1145 | 1734 | } |
jrose@1145 | 1735 | |
jrose@1145 | 1736 | // Initialize a BMH with a receiver bound directly to a methodOop. |
jrose@1145 | 1737 | void MethodHandles::init_BoundMethodHandle_with_receiver(Handle mh, |
jrose@1145 | 1738 | methodHandle original_m, |
jrose@1145 | 1739 | KlassHandle receiver_limit, |
jrose@1145 | 1740 | int decode_flags, |
jrose@1145 | 1741 | TRAPS) { |
jrose@1145 | 1742 | // Check arguments. |
jrose@1145 | 1743 | if (mh.is_null() || original_m.is_null()) { |
jrose@1145 | 1744 | THROW(vmSymbols::java_lang_InternalError()); |
jrose@1145 | 1745 | } |
jrose@1145 | 1746 | |
jrose@1145 | 1747 | KlassHandle receiver_klass; |
jrose@1145 | 1748 | { |
jrose@2639 | 1749 | oop receiver_oop = java_lang_invoke_BoundMethodHandle::argument(mh()); |
jrose@1145 | 1750 | if (receiver_oop != NULL) |
jrose@1145 | 1751 | receiver_klass = KlassHandle(THREAD, receiver_oop->klass()); |
jrose@1145 | 1752 | } |
jrose@1145 | 1753 | methodHandle m = dispatch_decoded_method(original_m, |
jrose@1145 | 1754 | receiver_limit, decode_flags, |
jrose@1145 | 1755 | receiver_klass, |
jrose@1145 | 1756 | CHECK); |
jrose@1145 | 1757 | if (m.is_null()) { THROW(vmSymbols::java_lang_InternalError()); } |
jrose@1145 | 1758 | if (m->is_abstract()) { THROW(vmSymbols::java_lang_AbstractMethodError()); } |
jrose@1145 | 1759 | |
never@2895 | 1760 | int vmargslot = m->size_of_parameters() - 1; |
never@2895 | 1761 | assert(java_lang_invoke_BoundMethodHandle::vmargslot(mh()) == vmargslot, ""); |
jrose@1145 | 1762 | |
jrose@1145 | 1763 | if (VerifyMethodHandles) { |
jrose@1145 | 1764 | verify_BoundMethodHandle_with_receiver(mh, m, CHECK); |
jrose@1145 | 1765 | } |
jrose@1145 | 1766 | |
jrose@2639 | 1767 | java_lang_invoke_BoundMethodHandle::set_vmtarget(mh(), m()); |
jrose@1145 | 1768 | |
twisti@2806 | 1769 | DEBUG_ONLY(KlassHandle junk1; int junk2); |
twisti@2806 | 1770 | assert(MethodHandles::decode_method(mh(), junk1, junk2) == m, "properly stored for later decoding"); |
jrose@1145 | 1771 | assert(decode_MethodHandle_stack_pushes(mh()) == 1, "BMH pushes one stack slot"); |
jrose@1145 | 1772 | |
jrose@1145 | 1773 | // Done! |
jrose@2639 | 1774 | java_lang_invoke_MethodHandle::set_vmentry(mh(), MethodHandles::entry(MethodHandles::_bound_ref_direct_mh)); |
jrose@1145 | 1775 | } |
jrose@1145 | 1776 | |
jrose@1145 | 1777 | void MethodHandles::verify_BoundMethodHandle(Handle mh, Handle target, int argnum, |
jrose@1145 | 1778 | bool direct_to_method, TRAPS) { |
never@2950 | 1779 | ResourceMark rm; |
jrose@1145 | 1780 | Handle ptype_handle(THREAD, |
jrose@2639 | 1781 | java_lang_invoke_MethodType::ptype(java_lang_invoke_MethodHandle::type(target()), argnum)); |
jrose@1145 | 1782 | KlassHandle ptype_klass; |
jrose@1145 | 1783 | BasicType ptype = java_lang_Class::as_BasicType(ptype_handle(), &ptype_klass); |
jrose@1145 | 1784 | int slots_pushed = type2size[ptype]; |
jrose@1145 | 1785 | |
jrose@2639 | 1786 | oop argument = java_lang_invoke_BoundMethodHandle::argument(mh()); |
jrose@1145 | 1787 | |
jrose@1145 | 1788 | const char* err = NULL; |
jrose@1145 | 1789 | |
jrose@1145 | 1790 | switch (ptype) { |
jrose@1145 | 1791 | case T_OBJECT: |
jrose@1145 | 1792 | if (argument != NULL) |
jrose@1145 | 1793 | // we must implicitly convert from the arg type to the outgoing ptype |
jrose@1145 | 1794 | err = check_argument_type_change(T_OBJECT, argument->klass(), ptype, ptype_klass(), argnum); |
jrose@1145 | 1795 | break; |
jrose@1145 | 1796 | |
jrose@1145 | 1797 | case T_ARRAY: case T_VOID: |
jrose@1145 | 1798 | assert(false, "array, void do not appear here"); |
jrose@1145 | 1799 | default: |
jrose@1145 | 1800 | if (ptype != T_INT && !is_subword_type(ptype)) { |
jrose@1145 | 1801 | err = "unexpected parameter type"; |
jrose@1145 | 1802 | break; |
jrose@1145 | 1803 | } |
jrose@1145 | 1804 | // check subrange of Integer.value, if necessary |
never@1577 | 1805 | if (argument == NULL || argument->klass() != SystemDictionary::Integer_klass()) { |
jrose@1145 | 1806 | err = "bound integer argument must be of type java.lang.Integer"; |
jrose@1145 | 1807 | break; |
jrose@1145 | 1808 | } |
jrose@1145 | 1809 | if (ptype != T_INT) { |
jrose@1145 | 1810 | int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT); |
jrose@1145 | 1811 | jint value = argument->int_field(value_offset); |
twisti@2204 | 1812 | int vminfo = adapter_unbox_subword_vminfo(ptype); |
jrose@1145 | 1813 | jint subword = truncate_subword_from_vminfo(value, vminfo); |
jrose@1145 | 1814 | if (value != subword) { |
jrose@1145 | 1815 | err = "bound subword value does not fit into the subword type"; |
jrose@1145 | 1816 | break; |
jrose@1145 | 1817 | } |
jrose@1145 | 1818 | } |
jrose@1145 | 1819 | break; |
jrose@1145 | 1820 | case T_FLOAT: |
jrose@1145 | 1821 | case T_DOUBLE: |
jrose@1145 | 1822 | case T_LONG: |
jrose@1145 | 1823 | { |
jrose@1145 | 1824 | // we must implicitly convert from the unboxed arg type to the outgoing ptype |
jrose@1145 | 1825 | BasicType argbox = java_lang_boxing_object::basic_type(argument); |
jrose@1145 | 1826 | if (argbox != ptype) { |
jrose@1145 | 1827 | err = check_argument_type_change(T_OBJECT, (argument == NULL |
never@1577 | 1828 | ? SystemDictionary::Object_klass() |
jrose@1145 | 1829 | : argument->klass()), |
jrose@1145 | 1830 | ptype, ptype_klass(), argnum); |
jrose@1145 | 1831 | assert(err != NULL, "this must be an error"); |
jrose@1145 | 1832 | } |
jrose@1145 | 1833 | break; |
jrose@1145 | 1834 | } |
jrose@1145 | 1835 | } |
jrose@1145 | 1836 | |
jrose@1145 | 1837 | if (err == NULL) { |
jrose@1145 | 1838 | DEBUG_ONLY(int this_pushes = decode_MethodHandle_stack_pushes(mh())); |
jrose@1145 | 1839 | if (direct_to_method) { |
jrose@1145 | 1840 | assert(this_pushes == slots_pushed, "BMH pushes one or two stack slots"); |
jrose@1145 | 1841 | } else { |
jrose@1474 | 1842 | int target_pushes = decode_MethodHandle_stack_pushes(target()); |
jrose@1474 | 1843 | assert(this_pushes == slots_pushed + target_pushes, "BMH stack motion must be correct"); |
jrose@1145 | 1844 | } |
jrose@1145 | 1845 | } |
jrose@1145 | 1846 | |
jrose@1145 | 1847 | if (err == NULL) { |
jrose@1145 | 1848 | // Verify the rest of the method type. |
jrose@2639 | 1849 | err = check_method_type_insertion(java_lang_invoke_MethodHandle::type(mh()), |
jrose@1145 | 1850 | argnum, ptype_handle(), |
jrose@2639 | 1851 | java_lang_invoke_MethodHandle::type(target())); |
jrose@1145 | 1852 | } |
jrose@1145 | 1853 | |
jrose@1145 | 1854 | if (err != NULL) { |
jrose@1145 | 1855 | THROW_MSG(vmSymbols::java_lang_InternalError(), err); |
jrose@1145 | 1856 | } |
jrose@1145 | 1857 | } |
jrose@1145 | 1858 | |
jrose@1145 | 1859 | void MethodHandles::init_BoundMethodHandle(Handle mh, Handle target, int argnum, TRAPS) { |
jrose@1145 | 1860 | // Check arguments. |
jrose@2639 | 1861 | if (mh.is_null() || target.is_null() || !java_lang_invoke_MethodHandle::is_instance(target())) { |
jrose@1145 | 1862 | THROW(vmSymbols::java_lang_InternalError()); |
jrose@1145 | 1863 | } |
jrose@1145 | 1864 | |
never@2895 | 1865 | int argslot = java_lang_invoke_BoundMethodHandle::vmargslot(mh()); |
jrose@1145 | 1866 | |
jrose@1145 | 1867 | if (VerifyMethodHandles) { |
jrose@1145 | 1868 | int insert_after = argnum - 1; |
never@2895 | 1869 | verify_vmargslot(mh, insert_after, argslot, CHECK); |
jrose@1145 | 1870 | verify_vmslots(mh, CHECK); |
jrose@1145 | 1871 | } |
jrose@1145 | 1872 | |
twisti@1573 | 1873 | // Get bound type and required slots. |
twisti@2806 | 1874 | BasicType ptype; |
twisti@2806 | 1875 | { |
twisti@2806 | 1876 | oop ptype_oop = java_lang_invoke_MethodType::ptype(java_lang_invoke_MethodHandle::type(target()), argnum); |
twisti@2806 | 1877 | ptype = java_lang_Class::as_BasicType(ptype_oop); |
twisti@2806 | 1878 | } |
twisti@1573 | 1879 | int slots_pushed = type2size[ptype]; |
twisti@1573 | 1880 | |
jrose@1145 | 1881 | // If (a) the target is a direct non-dispatched method handle, |
jrose@1145 | 1882 | // or (b) the target is a dispatched direct method handle and we |
jrose@1145 | 1883 | // are binding the receiver, cut out the middle-man. |
jrose@1145 | 1884 | // Do this by decoding the DMH and using its methodOop directly as vmtarget. |
jrose@1145 | 1885 | bool direct_to_method = false; |
jrose@1145 | 1886 | if (OptimizeMethodHandles && |
jrose@1145 | 1887 | target->klass() == SystemDictionary::DirectMethodHandle_klass() && |
never@2937 | 1888 | (argnum != 0 || java_lang_invoke_BoundMethodHandle::argument(mh()) != NULL) && |
jrose@2639 | 1889 | (argnum == 0 || java_lang_invoke_DirectMethodHandle::vmindex(target()) < 0)) { |
twisti@2806 | 1890 | KlassHandle receiver_limit; int decode_flags = 0; |
twisti@2806 | 1891 | methodHandle m = decode_method(target(), receiver_limit, decode_flags); |
jrose@1145 | 1892 | if (m.is_null()) { THROW_MSG(vmSymbols::java_lang_InternalError(), "DMH failed to decode"); } |
twisti@1573 | 1893 | DEBUG_ONLY(int m_vmslots = m->size_of_parameters() - slots_pushed); // pos. of 1st arg. |
jrose@2639 | 1894 | assert(java_lang_invoke_BoundMethodHandle::vmslots(mh()) == m_vmslots, "type w/ m sig"); |
jrose@1145 | 1895 | if (argnum == 0 && (decode_flags & _dmf_has_receiver) != 0) { |
jrose@1145 | 1896 | init_BoundMethodHandle_with_receiver(mh, m, |
jrose@1145 | 1897 | receiver_limit, decode_flags, |
jrose@1145 | 1898 | CHECK); |
jrose@1145 | 1899 | return; |
jrose@1145 | 1900 | } |
jrose@1145 | 1901 | |
jrose@1145 | 1902 | // Even if it is not a bound receiver, we still might be able |
jrose@1145 | 1903 | // to bind another argument and still invoke the methodOop directly. |
jrose@1145 | 1904 | if (!(decode_flags & _dmf_does_dispatch)) { |
jrose@1145 | 1905 | direct_to_method = true; |
jrose@2639 | 1906 | java_lang_invoke_BoundMethodHandle::set_vmtarget(mh(), m()); |
jrose@1145 | 1907 | } |
jrose@1145 | 1908 | } |
jrose@1145 | 1909 | if (!direct_to_method) |
jrose@2639 | 1910 | java_lang_invoke_BoundMethodHandle::set_vmtarget(mh(), target()); |
jrose@1145 | 1911 | |
jrose@1145 | 1912 | if (VerifyMethodHandles) { |
jrose@1145 | 1913 | verify_BoundMethodHandle(mh, target, argnum, direct_to_method, CHECK); |
jrose@1145 | 1914 | } |
jrose@1145 | 1915 | |
jrose@1145 | 1916 | // Next question: Is this a ref, int, or long bound value? |
jrose@1145 | 1917 | MethodHandleEntry* me = NULL; |
jrose@1145 | 1918 | if (ptype == T_OBJECT) { |
jrose@1145 | 1919 | if (direct_to_method) me = MethodHandles::entry(_bound_ref_direct_mh); |
jrose@1145 | 1920 | else me = MethodHandles::entry(_bound_ref_mh); |
jrose@1145 | 1921 | } else if (slots_pushed == 2) { |
jrose@1145 | 1922 | if (direct_to_method) me = MethodHandles::entry(_bound_long_direct_mh); |
jrose@1145 | 1923 | else me = MethodHandles::entry(_bound_long_mh); |
jrose@1145 | 1924 | } else if (slots_pushed == 1) { |
jrose@1145 | 1925 | if (direct_to_method) me = MethodHandles::entry(_bound_int_direct_mh); |
jrose@1145 | 1926 | else me = MethodHandles::entry(_bound_int_mh); |
jrose@1145 | 1927 | } else { |
jrose@1145 | 1928 | assert(false, ""); |
jrose@1145 | 1929 | } |
jrose@1145 | 1930 | |
jrose@1145 | 1931 | // Done! |
jrose@2639 | 1932 | java_lang_invoke_MethodHandle::set_vmentry(mh(), me); |
jrose@1145 | 1933 | } |
jrose@1145 | 1934 | |
jrose@1145 | 1935 | static void throw_InternalError_for_bad_conversion(int conversion, const char* err, TRAPS) { |
jrose@1145 | 1936 | char msg[200]; |
jrose@1145 | 1937 | jio_snprintf(msg, sizeof(msg), "bad adapter (conversion=0x%08x): %s", conversion, err); |
jrose@1145 | 1938 | THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), msg); |
jrose@1145 | 1939 | } |
jrose@1145 | 1940 | |
jrose@1145 | 1941 | void MethodHandles::verify_AdapterMethodHandle(Handle mh, int argnum, TRAPS) { |
never@2950 | 1942 | ResourceMark rm; |
jrose@2639 | 1943 | jint conversion = java_lang_invoke_AdapterMethodHandle::conversion(mh()); |
jrose@2639 | 1944 | int argslot = java_lang_invoke_AdapterMethodHandle::vmargslot(mh()); |
jrose@1145 | 1945 | |
jrose@1145 | 1946 | verify_vmargslot(mh, argnum, argslot, CHECK); |
jrose@1145 | 1947 | verify_vmslots(mh, CHECK); |
jrose@1145 | 1948 | |
jrose@1145 | 1949 | jint conv_op = adapter_conversion_op(conversion); |
jrose@1145 | 1950 | if (!conv_op_valid(conv_op)) { |
jrose@1145 | 1951 | throw_InternalError_for_bad_conversion(conversion, "unknown conversion op", THREAD); |
jrose@1145 | 1952 | return; |
jrose@1145 | 1953 | } |
jrose@1145 | 1954 | EntryKind ek = adapter_entry_kind(conv_op); |
jrose@1145 | 1955 | |
jrose@1145 | 1956 | int stack_move = adapter_conversion_stack_move(conversion); |
jrose@1145 | 1957 | BasicType src = adapter_conversion_src_type(conversion); |
jrose@1145 | 1958 | BasicType dest = adapter_conversion_dest_type(conversion); |
jrose@1145 | 1959 | int vminfo = adapter_conversion_vminfo(conversion); // should be zero |
jrose@1145 | 1960 | |
jrose@2639 | 1961 | Handle argument(THREAD, java_lang_invoke_AdapterMethodHandle::argument(mh())); |
jrose@2639 | 1962 | Handle target(THREAD, java_lang_invoke_AdapterMethodHandle::vmtarget(mh())); |
jrose@2639 | 1963 | Handle src_mtype(THREAD, java_lang_invoke_MethodHandle::type(mh())); |
jrose@2639 | 1964 | Handle dst_mtype(THREAD, java_lang_invoke_MethodHandle::type(target())); |
never@2895 | 1965 | Handle arg_mtype; |
jrose@1145 | 1966 | |
jrose@1145 | 1967 | const char* err = NULL; |
jrose@1145 | 1968 | |
jrose@1145 | 1969 | if (err == NULL) { |
jrose@1145 | 1970 | // Check that the correct argument is supplied, but only if it is required. |
jrose@1145 | 1971 | switch (ek) { |
jrose@1145 | 1972 | case _adapter_check_cast: // target type of cast |
jrose@1145 | 1973 | case _adapter_ref_to_prim: // wrapper type from which to unbox |
jrose@1145 | 1974 | case _adapter_spread_args: // array type to spread from |
jrose@1145 | 1975 | if (!java_lang_Class::is_instance(argument()) |
jrose@1145 | 1976 | || java_lang_Class::is_primitive(argument())) |
jrose@1145 | 1977 | { err = "adapter requires argument of type java.lang.Class"; break; } |
never@2895 | 1978 | if (ek == _adapter_spread_args) { |
jrose@1145 | 1979 | // Make sure it is a suitable collection type. (Array, for now.) |
jrose@1145 | 1980 | Klass* ak = Klass::cast(java_lang_Class::as_klassOop(argument())); |
never@2895 | 1981 | if (!ak->oop_is_array()) |
never@2895 | 1982 | { err = "spread adapter requires argument representing an array class"; break; } |
never@2895 | 1983 | BasicType et = arrayKlass::cast(ak->as_klassOop())->element_type(); |
never@2895 | 1984 | if (et != dest && stack_move <= 0) |
never@2895 | 1985 | { err = "spread adapter requires array class argument of correct type"; break; } |
jrose@1145 | 1986 | } |
jrose@1145 | 1987 | break; |
never@2895 | 1988 | case _adapter_prim_to_ref: // boxer MH to use |
never@2895 | 1989 | case _adapter_collect_args: // method handle which collects the args |
never@2895 | 1990 | case _adapter_fold_args: // method handle which collects the args |
never@2895 | 1991 | if (!UseRicochetFrames) { |
never@2895 | 1992 | { err = "box/collect/fold operators are not supported"; break; } |
never@2895 | 1993 | } |
jrose@2639 | 1994 | if (!java_lang_invoke_MethodHandle::is_instance(argument())) |
jrose@1145 | 1995 | { err = "MethodHandle adapter argument required"; break; } |
never@2895 | 1996 | arg_mtype = Handle(THREAD, java_lang_invoke_MethodHandle::type(argument())); |
jrose@1145 | 1997 | break; |
jrose@1145 | 1998 | default: |
jrose@1145 | 1999 | if (argument.not_null()) |
jrose@1145 | 2000 | { err = "adapter has spurious argument"; break; } |
jrose@1145 | 2001 | break; |
jrose@1145 | 2002 | } |
jrose@1145 | 2003 | } |
jrose@1145 | 2004 | |
jrose@1145 | 2005 | if (err == NULL) { |
jrose@1145 | 2006 | // Check that the src/dest types are supplied if needed. |
never@2895 | 2007 | // Also check relevant parameter or return types. |
jrose@1145 | 2008 | switch (ek) { |
jrose@1474 | 2009 | case _adapter_check_cast: |
jrose@1474 | 2010 | if (src != T_OBJECT || dest != T_OBJECT) { |
jrose@1474 | 2011 | err = "adapter requires object src/dest conversion subfields"; |
jrose@1474 | 2012 | } |
jrose@1474 | 2013 | break; |
jrose@1145 | 2014 | case _adapter_prim_to_prim: |
jrose@1145 | 2015 | if (!is_java_primitive(src) || !is_java_primitive(dest) || src == dest) { |
jrose@1145 | 2016 | err = "adapter requires primitive src/dest conversion subfields"; break; |
jrose@1145 | 2017 | } |
jrose@1145 | 2018 | if ( (src == T_FLOAT || src == T_DOUBLE) && !(dest == T_FLOAT || dest == T_DOUBLE) || |
jrose@1145 | 2019 | !(src == T_FLOAT || src == T_DOUBLE) && (dest == T_FLOAT || dest == T_DOUBLE)) { |
jrose@1145 | 2020 | err = "adapter cannot convert beween floating and fixed-point"; break; |
jrose@1145 | 2021 | } |
jrose@1145 | 2022 | break; |
jrose@1145 | 2023 | case _adapter_ref_to_prim: |
jrose@1145 | 2024 | if (src != T_OBJECT || !is_java_primitive(dest) |
jrose@1145 | 2025 | || argument() != Klass::cast(SystemDictionary::box_klass(dest))->java_mirror()) { |
jrose@1145 | 2026 | err = "adapter requires primitive dest conversion subfield"; break; |
jrose@1145 | 2027 | } |
jrose@1145 | 2028 | break; |
jrose@1145 | 2029 | case _adapter_prim_to_ref: |
never@2895 | 2030 | if (!is_java_primitive(src) || dest != T_OBJECT) { |
jrose@1145 | 2031 | err = "adapter requires primitive src conversion subfield"; break; |
jrose@1145 | 2032 | } |
jrose@1145 | 2033 | break; |
jrose@1145 | 2034 | case _adapter_swap_args: |
jrose@1145 | 2035 | { |
never@2954 | 2036 | if (!src || !dest) { |
jrose@1145 | 2037 | err = "adapter requires src/dest conversion subfields for swap"; break; |
jrose@1145 | 2038 | } |
never@2954 | 2039 | int src_size = type2size[src]; |
never@2954 | 2040 | if (src_size != type2size[dest]) { |
never@2954 | 2041 | err = "adapter requires equal sizes for src/dest"; break; |
never@2954 | 2042 | } |
jrose@1145 | 2043 | int src_slot = argslot; |
jrose@1145 | 2044 | int dest_slot = vminfo; |
jrose@1145 | 2045 | int src_arg = argnum; |
never@2954 | 2046 | int dest_arg = argument_slot_to_argnum(src_mtype(), dest_slot); |
never@2954 | 2047 | verify_vmargslot(mh, dest_arg, dest_slot, CHECK); |
never@2954 | 2048 | if (!(dest_slot >= src_slot + src_size) && |
never@2954 | 2049 | !(src_slot >= dest_slot + src_size)) { |
never@2954 | 2050 | err = "source, destination slots must be distinct"; break; |
never@2954 | 2051 | } else if (!(src_slot > dest_slot)) { |
never@2954 | 2052 | err = "source of swap must be deeper in stack"; break; |
jrose@1145 | 2053 | } |
never@2954 | 2054 | err = check_argument_type_change(java_lang_invoke_MethodType::ptype(src_mtype(), dest_arg), |
never@2954 | 2055 | java_lang_invoke_MethodType::ptype(dst_mtype(), src_arg), |
never@2954 | 2056 | dest_arg); |
jrose@1145 | 2057 | if (err == NULL) |
never@2895 | 2058 | err = check_argument_type_change(java_lang_invoke_MethodType::ptype(src_mtype(), src_arg), |
never@2895 | 2059 | java_lang_invoke_MethodType::ptype(dst_mtype(), dest_arg), |
jrose@1145 | 2060 | src_arg); |
never@2954 | 2061 | break; |
never@2954 | 2062 | } |
never@2954 | 2063 | case _adapter_rot_args: |
never@2954 | 2064 | { |
never@2954 | 2065 | if (!src || !dest) { |
never@2954 | 2066 | err = "adapter requires src/dest conversion subfields for rotate"; break; |
never@2954 | 2067 | } |
never@2954 | 2068 | int src_slot = argslot; |
never@2954 | 2069 | int limit_raw = vminfo; |
never@2954 | 2070 | bool rot_down = (src_slot < limit_raw); |
never@2954 | 2071 | int limit_bias = (rot_down ? MethodHandles::OP_ROT_ARGS_DOWN_LIMIT_BIAS : 0); |
never@2954 | 2072 | int limit_slot = limit_raw - limit_bias; |
never@2954 | 2073 | int src_arg = argnum; |
never@2954 | 2074 | int limit_arg = argument_slot_to_argnum(src_mtype(), limit_slot); |
never@2954 | 2075 | verify_vmargslot(mh, limit_arg, limit_slot, CHECK); |
never@2954 | 2076 | if (src_slot == limit_slot) { |
never@2954 | 2077 | err = "source, destination slots must be distinct"; break; |
never@2954 | 2078 | } |
never@2954 | 2079 | if (!rot_down) { // rotate slots up == shift arguments left |
never@2954 | 2080 | // limit_slot is an inclusive lower limit |
never@2954 | 2081 | assert((src_slot > limit_slot) && (src_arg < limit_arg), ""); |
never@2954 | 2082 | // rotate up: [limit_slot..src_slot-ss] --> [limit_slot+ss..src_slot] |
never@2954 | 2083 | // that is: [src_arg+1..limit_arg] --> [src_arg..limit_arg-1] |
never@2954 | 2084 | for (int i = src_arg+1; i <= limit_arg && err == NULL; i++) { |
never@2954 | 2085 | err = check_argument_type_change(java_lang_invoke_MethodType::ptype(src_mtype(), i), |
never@2954 | 2086 | java_lang_invoke_MethodType::ptype(dst_mtype(), i-1), |
never@2954 | 2087 | i); |
never@2954 | 2088 | } |
never@2954 | 2089 | } else { // rotate slots down == shfit arguments right |
never@2954 | 2090 | // limit_slot is an exclusive upper limit |
never@2954 | 2091 | assert((src_slot < limit_slot - limit_bias) && (src_arg > limit_arg + limit_bias), ""); |
never@2954 | 2092 | // rotate down: [src_slot+ss..limit_slot) --> [src_slot..limit_slot-ss) |
never@2954 | 2093 | // that is: (limit_arg..src_arg-1] --> (dst_arg+1..src_arg] |
never@2954 | 2094 | for (int i = limit_arg+1; i <= src_arg-1 && err == NULL; i++) { |
never@2954 | 2095 | err = check_argument_type_change(java_lang_invoke_MethodType::ptype(src_mtype(), i), |
never@2954 | 2096 | java_lang_invoke_MethodType::ptype(dst_mtype(), i+1), |
never@2954 | 2097 | i); |
never@2954 | 2098 | } |
never@2954 | 2099 | } |
never@2954 | 2100 | if (err == NULL) { |
never@2954 | 2101 | int dest_arg = (rot_down ? limit_arg+1 : limit_arg); |
never@2954 | 2102 | err = check_argument_type_change(java_lang_invoke_MethodType::ptype(src_mtype(), src_arg), |
never@2954 | 2103 | java_lang_invoke_MethodType::ptype(dst_mtype(), dest_arg), |
never@2954 | 2104 | src_arg); |
never@2954 | 2105 | } |
jrose@1145 | 2106 | } |
jrose@1145 | 2107 | break; |
never@2895 | 2108 | case _adapter_spread_args: |
jrose@1145 | 2109 | case _adapter_collect_args: |
never@2895 | 2110 | case _adapter_fold_args: |
jrose@1145 | 2111 | { |
never@2895 | 2112 | bool is_spread = (ek == _adapter_spread_args); |
never@2895 | 2113 | bool is_fold = (ek == _adapter_fold_args); |
never@2895 | 2114 | BasicType coll_type = is_spread ? src : dest; |
never@2895 | 2115 | BasicType elem_type = is_spread ? dest : src; |
never@2895 | 2116 | // coll_type is type of args in collected form (or T_VOID if none) |
never@2895 | 2117 | // elem_type is common type of args in spread form (or T_VOID if missing or heterogeneous) |
never@2895 | 2118 | if (coll_type == 0 || elem_type == 0) { |
never@2895 | 2119 | err = "adapter requires src/dest subfields for spread or collect"; break; |
never@2895 | 2120 | } |
never@2895 | 2121 | if (is_spread && coll_type != T_OBJECT) { |
never@2895 | 2122 | err = "spread adapter requires object type for argument bundle"; break; |
never@2895 | 2123 | } |
never@2895 | 2124 | Handle spread_mtype = (is_spread ? dst_mtype : src_mtype); |
never@2895 | 2125 | int spread_slot = argslot; |
never@2895 | 2126 | int spread_arg = argnum; |
never@2895 | 2127 | int slots_pushed = stack_move / stack_move_unit(); |
never@2895 | 2128 | int coll_slot_count = type2size[coll_type]; |
never@2895 | 2129 | int spread_slot_count = (is_spread ? slots_pushed : -slots_pushed) + coll_slot_count; |
never@2895 | 2130 | if (is_fold) spread_slot_count = argument_slot_count(arg_mtype()); |
never@2895 | 2131 | if (!is_spread) { |
never@2895 | 2132 | int init_slots = argument_slot_count(src_mtype()); |
never@2895 | 2133 | int coll_slots = argument_slot_count(arg_mtype()); |
never@2895 | 2134 | if (spread_slot_count > init_slots || |
never@2895 | 2135 | spread_slot_count != coll_slots) { |
never@2895 | 2136 | err = "collect adapter has inconsistent arg counts"; break; |
never@2895 | 2137 | } |
never@2895 | 2138 | int next_slots = argument_slot_count(dst_mtype()); |
never@2895 | 2139 | int unchanged_slots_in = (init_slots - spread_slot_count); |
never@2895 | 2140 | int unchanged_slots_out = (next_slots - coll_slot_count - (is_fold ? spread_slot_count : 0)); |
never@2895 | 2141 | if (unchanged_slots_in != unchanged_slots_out) { |
never@2895 | 2142 | err = "collect adapter continuation has inconsistent arg counts"; break; |
never@2895 | 2143 | } |
jrose@1145 | 2144 | } |
jrose@1145 | 2145 | } |
jrose@1145 | 2146 | break; |
jrose@1145 | 2147 | default: |
jrose@1145 | 2148 | if (src != 0 || dest != 0) { |
jrose@1145 | 2149 | err = "adapter has spurious src/dest conversion subfields"; break; |
jrose@1145 | 2150 | } |
jrose@1145 | 2151 | break; |
jrose@1145 | 2152 | } |
jrose@1145 | 2153 | } |
jrose@1145 | 2154 | |
jrose@1145 | 2155 | if (err == NULL) { |
jrose@1145 | 2156 | // Check the stack_move subfield. |
jrose@1145 | 2157 | // It must always report the net change in stack size, positive or negative. |
jrose@1145 | 2158 | int slots_pushed = stack_move / stack_move_unit(); |
jrose@1145 | 2159 | switch (ek) { |
jrose@1145 | 2160 | case _adapter_prim_to_prim: |
jrose@1145 | 2161 | case _adapter_ref_to_prim: |
jrose@1145 | 2162 | case _adapter_prim_to_ref: |
jrose@1145 | 2163 | if (slots_pushed != type2size[dest] - type2size[src]) { |
jrose@1145 | 2164 | err = "wrong stack motion for primitive conversion"; |
jrose@1145 | 2165 | } |
jrose@1145 | 2166 | break; |
jrose@1145 | 2167 | case _adapter_dup_args: |
jrose@1145 | 2168 | if (slots_pushed <= 0) { |
jrose@1145 | 2169 | err = "adapter requires conversion subfield slots_pushed > 0"; |
jrose@1145 | 2170 | } |
jrose@1145 | 2171 | break; |
jrose@1145 | 2172 | case _adapter_drop_args: |
jrose@1145 | 2173 | if (slots_pushed >= 0) { |
jrose@1145 | 2174 | err = "adapter requires conversion subfield slots_pushed < 0"; |
jrose@1145 | 2175 | } |
jrose@1145 | 2176 | break; |
jrose@1145 | 2177 | case _adapter_collect_args: |
never@2895 | 2178 | case _adapter_fold_args: |
never@2895 | 2179 | if (slots_pushed > 2) { |
never@2895 | 2180 | err = "adapter requires conversion subfield slots_pushed <= 2"; |
jrose@1145 | 2181 | } |
jrose@1145 | 2182 | break; |
jrose@1145 | 2183 | case _adapter_spread_args: |
jrose@1145 | 2184 | if (slots_pushed < -1) { |
jrose@1145 | 2185 | err = "adapter requires conversion subfield slots_pushed >= -1"; |
jrose@1145 | 2186 | } |
jrose@1145 | 2187 | break; |
jrose@1145 | 2188 | default: |
jrose@1145 | 2189 | if (stack_move != 0) { |
jrose@1145 | 2190 | err = "adapter has spurious stack_move conversion subfield"; |
jrose@1145 | 2191 | } |
jrose@1145 | 2192 | break; |
jrose@1145 | 2193 | } |
jrose@1145 | 2194 | if (err == NULL && stack_move != slots_pushed * stack_move_unit()) { |
jrose@1145 | 2195 | err = "stack_move conversion subfield must be multiple of stack_move_unit"; |
jrose@1145 | 2196 | } |
jrose@1145 | 2197 | } |
jrose@1145 | 2198 | |
jrose@1145 | 2199 | if (err == NULL) { |
never@2895 | 2200 | // Make sure this adapter's stack pushing is accurately recorded. |
jrose@1145 | 2201 | int slots_pushed = stack_move / stack_move_unit(); |
jrose@2639 | 2202 | int this_vmslots = java_lang_invoke_MethodHandle::vmslots(mh()); |
jrose@2639 | 2203 | int target_vmslots = java_lang_invoke_MethodHandle::vmslots(target()); |
never@2895 | 2204 | int target_pushes = decode_MethodHandle_stack_pushes(target()); |
jrose@1474 | 2205 | if (slots_pushed != (target_vmslots - this_vmslots)) { |
jrose@1145 | 2206 | err = "stack_move inconsistent with previous and current MethodType vmslots"; |
never@2895 | 2207 | } else { |
never@2895 | 2208 | int this_pushes = decode_MethodHandle_stack_pushes(mh()); |
never@2895 | 2209 | if (slots_pushed + target_pushes != this_pushes) { |
never@2895 | 2210 | if (this_pushes == 0) |
never@2895 | 2211 | err = "adapter push count not initialized"; |
never@2895 | 2212 | else |
never@2895 | 2213 | err = "adapter push count is wrong"; |
jrose@1145 | 2214 | } |
jrose@1145 | 2215 | } |
jrose@1145 | 2216 | |
jrose@1145 | 2217 | // While we're at it, check that the stack motion decoder works: |
jrose@1145 | 2218 | DEBUG_ONLY(int this_pushes = decode_MethodHandle_stack_pushes(mh())); |
jrose@1474 | 2219 | assert(this_pushes == slots_pushed + target_pushes, "AMH stack motion must be correct"); |
jrose@1145 | 2220 | } |
jrose@1145 | 2221 | |
jrose@1145 | 2222 | if (err == NULL && vminfo != 0) { |
jrose@1145 | 2223 | switch (ek) { |
never@2895 | 2224 | case _adapter_swap_args: |
never@2895 | 2225 | case _adapter_rot_args: |
never@2895 | 2226 | case _adapter_prim_to_ref: |
never@2895 | 2227 | case _adapter_collect_args: |
never@2895 | 2228 | case _adapter_fold_args: |
never@2895 | 2229 | break; // OK |
jrose@1145 | 2230 | default: |
jrose@1145 | 2231 | err = "vminfo subfield is reserved to the JVM"; |
jrose@1145 | 2232 | } |
jrose@1145 | 2233 | } |
jrose@1145 | 2234 | |
jrose@1145 | 2235 | // Do additional ad hoc checks. |
jrose@1145 | 2236 | if (err == NULL) { |
jrose@1145 | 2237 | switch (ek) { |
jrose@1145 | 2238 | case _adapter_retype_only: |
jrose@1474 | 2239 | err = check_method_type_passthrough(src_mtype(), dst_mtype(), false); |
jrose@1474 | 2240 | break; |
jrose@1474 | 2241 | |
jrose@1474 | 2242 | case _adapter_retype_raw: |
jrose@1474 | 2243 | err = check_method_type_passthrough(src_mtype(), dst_mtype(), true); |
jrose@1145 | 2244 | break; |
jrose@1145 | 2245 | |
jrose@1145 | 2246 | case _adapter_check_cast: |
jrose@1145 | 2247 | { |
jrose@1145 | 2248 | // The actual value being checked must be a reference: |
jrose@2639 | 2249 | err = check_argument_type_change(java_lang_invoke_MethodType::ptype(src_mtype(), argnum), |
jrose@1145 | 2250 | object_java_mirror(), argnum); |
jrose@1145 | 2251 | if (err != NULL) break; |
jrose@1145 | 2252 | |
jrose@1145 | 2253 | // The output of the cast must fit with the destination argument: |
jrose@1145 | 2254 | Handle cast_class = argument; |
jrose@1145 | 2255 | err = check_method_type_conversion(src_mtype(), |
jrose@1145 | 2256 | argnum, cast_class(), |
jrose@1145 | 2257 | dst_mtype()); |
jrose@1145 | 2258 | } |
jrose@1145 | 2259 | break; |
jrose@1145 | 2260 | |
jrose@1145 | 2261 | // %%% TO DO: continue in remaining cases to verify src/dst_mtype if VerifyMethodHandles |
jrose@1145 | 2262 | } |
jrose@1145 | 2263 | } |
jrose@1145 | 2264 | |
jrose@1145 | 2265 | if (err != NULL) { |
jrose@1145 | 2266 | throw_InternalError_for_bad_conversion(conversion, err, THREAD); |
jrose@1145 | 2267 | return; |
jrose@1145 | 2268 | } |
jrose@1145 | 2269 | |
jrose@1145 | 2270 | } |
jrose@1145 | 2271 | |
jrose@1145 | 2272 | void MethodHandles::init_AdapterMethodHandle(Handle mh, Handle target, int argnum, TRAPS) { |
twisti@2903 | 2273 | Handle argument = java_lang_invoke_AdapterMethodHandle::argument(mh()); |
twisti@2903 | 2274 | int argslot = java_lang_invoke_AdapterMethodHandle::vmargslot(mh()); |
twisti@2903 | 2275 | jint conversion = java_lang_invoke_AdapterMethodHandle::conversion(mh()); |
twisti@2903 | 2276 | jint conv_op = adapter_conversion_op(conversion); |
jrose@1145 | 2277 | |
jrose@1145 | 2278 | // adjust the adapter code to the internal EntryKind enumeration: |
jrose@1145 | 2279 | EntryKind ek_orig = adapter_entry_kind(conv_op); |
jrose@1145 | 2280 | EntryKind ek_opt = ek_orig; // may be optimized |
never@2895 | 2281 | EntryKind ek_try; // temp |
jrose@1145 | 2282 | |
jrose@1145 | 2283 | // Finalize the vmtarget field (Java initialized it to null). |
jrose@2639 | 2284 | if (!java_lang_invoke_MethodHandle::is_instance(target())) { |
jrose@1145 | 2285 | throw_InternalError_for_bad_conversion(conversion, "bad target", THREAD); |
jrose@1145 | 2286 | return; |
jrose@1145 | 2287 | } |
jrose@2639 | 2288 | java_lang_invoke_AdapterMethodHandle::set_vmtarget(mh(), target()); |
jrose@1145 | 2289 | |
jrose@1145 | 2290 | int stack_move = adapter_conversion_stack_move(conversion); |
jrose@1145 | 2291 | BasicType src = adapter_conversion_src_type(conversion); |
jrose@1145 | 2292 | BasicType dest = adapter_conversion_dest_type(conversion); |
jrose@1145 | 2293 | int vminfo = adapter_conversion_vminfo(conversion); // should be zero |
jrose@1145 | 2294 | |
never@2895 | 2295 | int slots_pushed = stack_move / stack_move_unit(); |
never@2895 | 2296 | |
never@2895 | 2297 | if (VerifyMethodHandles) { |
never@2895 | 2298 | verify_AdapterMethodHandle(mh, argnum, CHECK); |
never@2895 | 2299 | } |
never@2895 | 2300 | |
jrose@1145 | 2301 | const char* err = NULL; |
jrose@1145 | 2302 | |
never@2895 | 2303 | if (!conv_op_supported(conv_op)) { |
never@2895 | 2304 | err = "adapter not yet implemented in the JVM"; |
never@2895 | 2305 | } |
never@2895 | 2306 | |
jrose@1145 | 2307 | // Now it's time to finish the case analysis and pick a MethodHandleEntry. |
jrose@1145 | 2308 | switch (ek_orig) { |
jrose@1145 | 2309 | case _adapter_retype_only: |
jrose@1474 | 2310 | case _adapter_retype_raw: |
jrose@1145 | 2311 | case _adapter_check_cast: |
jrose@1145 | 2312 | case _adapter_dup_args: |
jrose@1145 | 2313 | case _adapter_drop_args: |
jrose@1145 | 2314 | // these work fine via general case code |
jrose@1145 | 2315 | break; |
jrose@1145 | 2316 | |
jrose@1145 | 2317 | case _adapter_prim_to_prim: |
jrose@1145 | 2318 | { |
jrose@1145 | 2319 | // Non-subword cases are {int,float,long,double} -> {int,float,long,double}. |
jrose@1145 | 2320 | // And, the {float,double} -> {int,long} cases must be handled by Java. |
jrose@1145 | 2321 | switch (type2size[src] *4+ type2size[dest]) { |
jrose@1145 | 2322 | case 1 *4+ 1: |
jrose@1145 | 2323 | assert(src == T_INT || is_subword_type(src), "source is not float"); |
jrose@1145 | 2324 | // Subword-related cases are int -> {boolean,byte,char,short}. |
jrose@1145 | 2325 | ek_opt = _adapter_opt_i2i; |
twisti@2204 | 2326 | vminfo = adapter_prim_to_prim_subword_vminfo(dest); |
jrose@1145 | 2327 | break; |
jrose@1145 | 2328 | case 2 *4+ 1: |
jrose@1145 | 2329 | if (src == T_LONG && (dest == T_INT || is_subword_type(dest))) { |
jrose@1145 | 2330 | ek_opt = _adapter_opt_l2i; |
twisti@2204 | 2331 | vminfo = adapter_prim_to_prim_subword_vminfo(dest); |
jrose@1145 | 2332 | } else if (src == T_DOUBLE && dest == T_FLOAT) { |
jrose@1145 | 2333 | ek_opt = _adapter_opt_d2f; |
jrose@1145 | 2334 | } else { |
twisti@2903 | 2335 | goto throw_not_impl; // runs user code, hence could block |
jrose@1145 | 2336 | } |
jrose@1145 | 2337 | break; |
jrose@1145 | 2338 | case 1 *4+ 2: |
never@2895 | 2339 | if ((src == T_INT || is_subword_type(src)) && dest == T_LONG) { |
jrose@1145 | 2340 | ek_opt = _adapter_opt_i2l; |
jrose@1145 | 2341 | } else if (src == T_FLOAT && dest == T_DOUBLE) { |
jrose@1145 | 2342 | ek_opt = _adapter_opt_f2d; |
jrose@1145 | 2343 | } else { |
twisti@2903 | 2344 | goto throw_not_impl; // runs user code, hence could block |
jrose@1145 | 2345 | } |
jrose@1145 | 2346 | break; |
jrose@1145 | 2347 | default: |
twisti@2903 | 2348 | goto throw_not_impl; // runs user code, hence could block |
jrose@1145 | 2349 | break; |
jrose@1145 | 2350 | } |
jrose@1145 | 2351 | } |
jrose@1145 | 2352 | break; |
jrose@1145 | 2353 | |
jrose@1145 | 2354 | case _adapter_ref_to_prim: |
jrose@1145 | 2355 | { |
jrose@1145 | 2356 | switch (type2size[dest]) { |
jrose@1145 | 2357 | case 1: |
jrose@1145 | 2358 | ek_opt = _adapter_opt_unboxi; |
twisti@2204 | 2359 | vminfo = adapter_unbox_subword_vminfo(dest); |
jrose@1145 | 2360 | break; |
jrose@1145 | 2361 | case 2: |
jrose@1145 | 2362 | ek_opt = _adapter_opt_unboxl; |
jrose@1145 | 2363 | break; |
jrose@1145 | 2364 | default: |
twisti@2903 | 2365 | goto throw_not_impl; |
jrose@1145 | 2366 | break; |
jrose@1145 | 2367 | } |
jrose@1145 | 2368 | } |
jrose@1145 | 2369 | break; |
jrose@1145 | 2370 | |
jrose@1145 | 2371 | case _adapter_prim_to_ref: |
never@2895 | 2372 | { |
never@2895 | 2373 | assert(UseRicochetFrames, "else don't come here"); |
never@2895 | 2374 | // vminfo will be the location to insert the return value |
never@2895 | 2375 | vminfo = argslot; |
never@2895 | 2376 | ek_opt = _adapter_opt_collect_ref; |
never@2895 | 2377 | ensure_vmlayout_field(target, CHECK); |
twisti@2903 | 2378 | // for MethodHandleWalk: |
twisti@2903 | 2379 | if (java_lang_invoke_AdapterMethodHandle::is_instance(argument())) |
twisti@2903 | 2380 | ensure_vmlayout_field(argument, CHECK); |
never@2895 | 2381 | if (!OptimizeMethodHandles) break; |
never@2895 | 2382 | switch (type2size[src]) { |
never@2895 | 2383 | case 1: |
never@2895 | 2384 | ek_try = EntryKind(_adapter_opt_filter_S0_ref + argslot); |
never@2895 | 2385 | if (ek_try < _adapter_opt_collect_LAST && |
never@2895 | 2386 | ek_adapter_opt_collect_slot(ek_try) == argslot) { |
never@2895 | 2387 | assert(ek_adapter_opt_collect_count(ek_try) == 1 && |
never@2895 | 2388 | ek_adapter_opt_collect_type(ek_try) == T_OBJECT, ""); |
never@2895 | 2389 | ek_opt = ek_try; |
never@2895 | 2390 | break; |
never@2895 | 2391 | } |
never@2895 | 2392 | // else downgrade to variable slot: |
never@2895 | 2393 | ek_opt = _adapter_opt_collect_1_ref; |
never@2895 | 2394 | break; |
never@2895 | 2395 | case 2: |
never@2895 | 2396 | ek_try = EntryKind(_adapter_opt_collect_2_S0_ref + argslot); |
never@2895 | 2397 | if (ek_try < _adapter_opt_collect_LAST && |
never@2895 | 2398 | ek_adapter_opt_collect_slot(ek_try) == argslot) { |
never@2895 | 2399 | assert(ek_adapter_opt_collect_count(ek_try) == 2 && |
never@2895 | 2400 | ek_adapter_opt_collect_type(ek_try) == T_OBJECT, ""); |
never@2895 | 2401 | ek_opt = ek_try; |
never@2895 | 2402 | break; |
never@2895 | 2403 | } |
never@2895 | 2404 | // else downgrade to variable slot: |
never@2895 | 2405 | ek_opt = _adapter_opt_collect_2_ref; |
never@2895 | 2406 | break; |
never@2895 | 2407 | default: |
twisti@2903 | 2408 | goto throw_not_impl; |
never@2895 | 2409 | break; |
never@2895 | 2410 | } |
never@2895 | 2411 | } |
never@2895 | 2412 | break; |
jrose@1145 | 2413 | |
jrose@1145 | 2414 | case _adapter_swap_args: |
jrose@1145 | 2415 | case _adapter_rot_args: |
jrose@1145 | 2416 | { |
jrose@1145 | 2417 | int swap_slots = type2size[src]; |
jrose@1145 | 2418 | int src_slot = argslot; |
jrose@1145 | 2419 | int dest_slot = vminfo; |
jrose@1145 | 2420 | int rotate = (ek_orig == _adapter_swap_args) ? 0 : (src_slot > dest_slot) ? 1 : -1; |
jrose@1145 | 2421 | switch (swap_slots) { |
jrose@1145 | 2422 | case 1: |
jrose@1145 | 2423 | ek_opt = (!rotate ? _adapter_opt_swap_1 : |
jrose@1145 | 2424 | rotate > 0 ? _adapter_opt_rot_1_up : _adapter_opt_rot_1_down); |
jrose@1145 | 2425 | break; |
jrose@1145 | 2426 | case 2: |
jrose@1145 | 2427 | ek_opt = (!rotate ? _adapter_opt_swap_2 : |
jrose@1145 | 2428 | rotate > 0 ? _adapter_opt_rot_2_up : _adapter_opt_rot_2_down); |
jrose@1145 | 2429 | break; |
jrose@1145 | 2430 | default: |
twisti@2903 | 2431 | goto throw_not_impl; |
jrose@1145 | 2432 | break; |
jrose@1145 | 2433 | } |
jrose@1145 | 2434 | } |
jrose@1145 | 2435 | break; |
jrose@1145 | 2436 | |
jrose@1145 | 2437 | case _adapter_spread_args: |
jrose@1145 | 2438 | { |
never@2895 | 2439 | #ifdef TARGET_ARCH_NYI_6939861 |
never@2895 | 2440 | // ports before 6939861 supported only three kinds of spread ops |
never@2895 | 2441 | if (!UseRicochetFrames) { |
never@2895 | 2442 | int array_size = slots_pushed + 1; |
never@2895 | 2443 | assert(array_size >= 0, ""); |
never@2895 | 2444 | vminfo = array_size; |
never@2895 | 2445 | switch (array_size) { |
never@2895 | 2446 | case 0: ek_opt = _adapter_opt_spread_0; break; |
never@2895 | 2447 | case 1: ek_opt = _adapter_opt_spread_1; break; |
never@2895 | 2448 | default: ek_opt = _adapter_opt_spread_more; break; |
never@2895 | 2449 | } |
never@2895 | 2450 | break; |
never@2895 | 2451 | } |
never@2895 | 2452 | #endif //TARGET_ARCH_NYI_6939861 |
jrose@1145 | 2453 | // vminfo will be the required length of the array |
never@2895 | 2454 | int array_size = (slots_pushed + 1) / (type2size[dest] == 2 ? 2 : 1); |
jrose@1145 | 2455 | vminfo = array_size; |
never@2895 | 2456 | // general case |
never@2895 | 2457 | switch (dest) { |
never@2895 | 2458 | case T_BOOLEAN : // fall through to T_BYTE: |
never@2895 | 2459 | case T_BYTE : ek_opt = _adapter_opt_spread_byte; break; |
never@2895 | 2460 | case T_CHAR : ek_opt = _adapter_opt_spread_char; break; |
never@2895 | 2461 | case T_SHORT : ek_opt = _adapter_opt_spread_short; break; |
never@2895 | 2462 | case T_INT : ek_opt = _adapter_opt_spread_int; break; |
never@2895 | 2463 | case T_LONG : ek_opt = _adapter_opt_spread_long; break; |
never@2895 | 2464 | case T_FLOAT : ek_opt = _adapter_opt_spread_float; break; |
never@2895 | 2465 | case T_DOUBLE : ek_opt = _adapter_opt_spread_double; break; |
never@2895 | 2466 | case T_OBJECT : ek_opt = _adapter_opt_spread_ref; break; |
never@2895 | 2467 | case T_VOID : if (array_size != 0) goto throw_not_impl; |
never@2895 | 2468 | ek_opt = _adapter_opt_spread_ref; break; |
never@2895 | 2469 | default : goto throw_not_impl; |
jrose@1145 | 2470 | } |
never@2895 | 2471 | assert(array_size == 0 || // it doesn't matter what the spreader is |
never@2895 | 2472 | (ek_adapter_opt_spread_count(ek_opt) == -1 && |
never@2895 | 2473 | (ek_adapter_opt_spread_type(ek_opt) == dest || |
never@2895 | 2474 | (ek_adapter_opt_spread_type(ek_opt) == T_BYTE && dest == T_BOOLEAN))), |
never@2895 | 2475 | err_msg("dest=%d ek_opt=%d", dest, ek_opt)); |
never@2895 | 2476 | |
never@2895 | 2477 | if (array_size <= 0) { |
never@2895 | 2478 | // since the general case does not handle length 0, this case is required: |
never@2895 | 2479 | ek_opt = _adapter_opt_spread_0; |
never@2895 | 2480 | break; |
never@2895 | 2481 | } |
never@2895 | 2482 | if (dest == T_OBJECT) { |
never@2895 | 2483 | ek_try = EntryKind(_adapter_opt_spread_1_ref - 1 + array_size); |
never@2895 | 2484 | if (ek_try < _adapter_opt_spread_LAST && |
never@2895 | 2485 | ek_adapter_opt_spread_count(ek_try) == array_size) { |
never@2895 | 2486 | assert(ek_adapter_opt_spread_type(ek_try) == dest, ""); |
never@2895 | 2487 | ek_opt = ek_try; |
never@2895 | 2488 | break; |
never@2895 | 2489 | } |
never@2895 | 2490 | } |
never@2895 | 2491 | break; |
jrose@1145 | 2492 | } |
jrose@1145 | 2493 | break; |
jrose@1145 | 2494 | |
never@2895 | 2495 | case _adapter_collect_args: |
never@2895 | 2496 | { |
never@2895 | 2497 | assert(UseRicochetFrames, "else don't come here"); |
twisti@2903 | 2498 | int elem_slots = argument_slot_count(java_lang_invoke_MethodHandle::type(argument())); |
never@2895 | 2499 | // vminfo will be the location to insert the return value |
never@2895 | 2500 | vminfo = argslot; |
never@2895 | 2501 | ensure_vmlayout_field(target, CHECK); |
twisti@2903 | 2502 | ensure_vmlayout_field(argument, CHECK); |
never@2895 | 2503 | |
never@2895 | 2504 | // general case: |
never@2895 | 2505 | switch (dest) { |
never@2895 | 2506 | default : if (!is_subword_type(dest)) goto throw_not_impl; |
never@2895 | 2507 | // else fall through: |
never@2895 | 2508 | case T_INT : ek_opt = _adapter_opt_collect_int; break; |
never@2895 | 2509 | case T_LONG : ek_opt = _adapter_opt_collect_long; break; |
never@2895 | 2510 | case T_FLOAT : ek_opt = _adapter_opt_collect_float; break; |
never@2895 | 2511 | case T_DOUBLE : ek_opt = _adapter_opt_collect_double; break; |
never@2895 | 2512 | case T_OBJECT : ek_opt = _adapter_opt_collect_ref; break; |
never@2895 | 2513 | case T_VOID : ek_opt = _adapter_opt_collect_void; break; |
never@2895 | 2514 | } |
never@2895 | 2515 | assert(ek_adapter_opt_collect_slot(ek_opt) == -1 && |
never@2895 | 2516 | ek_adapter_opt_collect_count(ek_opt) == -1 && |
never@2895 | 2517 | (ek_adapter_opt_collect_type(ek_opt) == dest || |
never@2895 | 2518 | ek_adapter_opt_collect_type(ek_opt) == T_INT && is_subword_type(dest)), |
never@2895 | 2519 | ""); |
never@2895 | 2520 | |
never@2895 | 2521 | if (dest == T_OBJECT && elem_slots == 1 && OptimizeMethodHandles) { |
never@2895 | 2522 | // filter operation on a ref |
never@2895 | 2523 | ek_try = EntryKind(_adapter_opt_filter_S0_ref + argslot); |
never@2895 | 2524 | if (ek_try < _adapter_opt_collect_LAST && |
never@2895 | 2525 | ek_adapter_opt_collect_slot(ek_try) == argslot) { |
never@2895 | 2526 | assert(ek_adapter_opt_collect_count(ek_try) == elem_slots && |
never@2895 | 2527 | ek_adapter_opt_collect_type(ek_try) == dest, ""); |
never@2895 | 2528 | ek_opt = ek_try; |
never@2895 | 2529 | break; |
never@2895 | 2530 | } |
never@2895 | 2531 | ek_opt = _adapter_opt_collect_1_ref; |
never@2895 | 2532 | break; |
never@2895 | 2533 | } |
never@2895 | 2534 | |
never@2895 | 2535 | if (dest == T_OBJECT && elem_slots == 2 && OptimizeMethodHandles) { |
never@2895 | 2536 | // filter of two arguments |
never@2895 | 2537 | ek_try = EntryKind(_adapter_opt_collect_2_S0_ref + argslot); |
never@2895 | 2538 | if (ek_try < _adapter_opt_collect_LAST && |
never@2895 | 2539 | ek_adapter_opt_collect_slot(ek_try) == argslot) { |
never@2895 | 2540 | assert(ek_adapter_opt_collect_count(ek_try) == elem_slots && |
never@2895 | 2541 | ek_adapter_opt_collect_type(ek_try) == dest, ""); |
never@2895 | 2542 | ek_opt = ek_try; |
never@2895 | 2543 | break; |
never@2895 | 2544 | } |
never@2895 | 2545 | ek_opt = _adapter_opt_collect_2_ref; |
never@2895 | 2546 | break; |
never@2895 | 2547 | } |
never@2895 | 2548 | |
never@2895 | 2549 | if (dest == T_OBJECT && OptimizeMethodHandles) { |
never@2895 | 2550 | // try to use a fixed length adapter |
never@2895 | 2551 | ek_try = EntryKind(_adapter_opt_collect_0_ref + elem_slots); |
never@2895 | 2552 | if (ek_try < _adapter_opt_collect_LAST && |
never@2895 | 2553 | ek_adapter_opt_collect_count(ek_try) == elem_slots) { |
never@2895 | 2554 | assert(ek_adapter_opt_collect_slot(ek_try) == -1 && |
never@2895 | 2555 | ek_adapter_opt_collect_type(ek_try) == dest, ""); |
never@2895 | 2556 | ek_opt = ek_try; |
never@2895 | 2557 | break; |
never@2895 | 2558 | } |
never@2895 | 2559 | } |
never@2895 | 2560 | |
never@2895 | 2561 | break; |
never@2895 | 2562 | } |
never@2895 | 2563 | |
never@2895 | 2564 | case _adapter_fold_args: |
never@2895 | 2565 | { |
never@2895 | 2566 | assert(UseRicochetFrames, "else don't come here"); |
twisti@2903 | 2567 | int elem_slots = argument_slot_count(java_lang_invoke_MethodHandle::type(argument())); |
never@2895 | 2568 | // vminfo will be the location to insert the return value |
never@2895 | 2569 | vminfo = argslot + elem_slots; |
never@2895 | 2570 | ensure_vmlayout_field(target, CHECK); |
twisti@2903 | 2571 | ensure_vmlayout_field(argument, CHECK); |
never@2895 | 2572 | |
never@2895 | 2573 | switch (dest) { |
never@2895 | 2574 | default : if (!is_subword_type(dest)) goto throw_not_impl; |
never@2895 | 2575 | // else fall through: |
never@2895 | 2576 | case T_INT : ek_opt = _adapter_opt_fold_int; break; |
never@2895 | 2577 | case T_LONG : ek_opt = _adapter_opt_fold_long; break; |
never@2895 | 2578 | case T_FLOAT : ek_opt = _adapter_opt_fold_float; break; |
never@2895 | 2579 | case T_DOUBLE : ek_opt = _adapter_opt_fold_double; break; |
never@2895 | 2580 | case T_OBJECT : ek_opt = _adapter_opt_fold_ref; break; |
never@2895 | 2581 | case T_VOID : ek_opt = _adapter_opt_fold_void; break; |
never@2895 | 2582 | } |
never@2895 | 2583 | assert(ek_adapter_opt_collect_slot(ek_opt) == -1 && |
never@2895 | 2584 | ek_adapter_opt_collect_count(ek_opt) == -1 && |
never@2895 | 2585 | (ek_adapter_opt_collect_type(ek_opt) == dest || |
never@2895 | 2586 | ek_adapter_opt_collect_type(ek_opt) == T_INT && is_subword_type(dest)), |
never@2895 | 2587 | ""); |
never@2895 | 2588 | |
never@2895 | 2589 | if (dest == T_OBJECT && elem_slots == 0 && OptimizeMethodHandles) { |
never@2895 | 2590 | // if there are no args, just pretend it's a collect |
never@2895 | 2591 | ek_opt = _adapter_opt_collect_0_ref; |
never@2895 | 2592 | break; |
never@2895 | 2593 | } |
never@2895 | 2594 | |
never@2895 | 2595 | if (dest == T_OBJECT && OptimizeMethodHandles) { |
never@2895 | 2596 | // try to use a fixed length adapter |
never@2895 | 2597 | ek_try = EntryKind(_adapter_opt_fold_1_ref - 1 + elem_slots); |
never@2895 | 2598 | if (ek_try < _adapter_opt_fold_LAST && |
never@2895 | 2599 | ek_adapter_opt_collect_count(ek_try) == elem_slots) { |
never@2895 | 2600 | assert(ek_adapter_opt_collect_slot(ek_try) == -1 && |
never@2895 | 2601 | ek_adapter_opt_collect_type(ek_try) == dest, ""); |
never@2895 | 2602 | ek_opt = ek_try; |
never@2895 | 2603 | break; |
never@2895 | 2604 | } |
never@2895 | 2605 | } |
never@2895 | 2606 | |
never@2895 | 2607 | break; |
never@2895 | 2608 | } |
jrose@1145 | 2609 | |
jrose@1145 | 2610 | default: |
jrose@1145 | 2611 | // should have failed much earlier; must be a missing case here |
jrose@1145 | 2612 | assert(false, "incomplete switch"); |
jrose@1145 | 2613 | // and fall through: |
jrose@1145 | 2614 | |
jrose@1145 | 2615 | throw_not_impl: |
never@2895 | 2616 | if (err == NULL) |
never@2895 | 2617 | err = "unknown adapter type"; |
jrose@1145 | 2618 | break; |
jrose@1145 | 2619 | } |
jrose@1145 | 2620 | |
twisti@2903 | 2621 | if (err == NULL && (vminfo & CONV_VMINFO_MASK) != vminfo) { |
never@2895 | 2622 | // should not happen, since vminfo is used to encode arg/slot indexes < 255 |
never@2895 | 2623 | err = "vminfo overflow"; |
never@2895 | 2624 | } |
never@2895 | 2625 | |
twisti@2903 | 2626 | if (err == NULL && !have_entry(ek_opt)) { |
never@2895 | 2627 | err = "adapter stub for this kind of method handle is missing"; |
never@2895 | 2628 | } |
never@2895 | 2629 | |
twisti@2903 | 2630 | if (err == NULL && ek_opt == ek_orig) { |
twisti@2903 | 2631 | switch (ek_opt) { |
twisti@2903 | 2632 | case _adapter_prim_to_prim: |
twisti@2903 | 2633 | case _adapter_ref_to_prim: |
twisti@2903 | 2634 | case _adapter_prim_to_ref: |
twisti@2903 | 2635 | case _adapter_swap_args: |
twisti@2903 | 2636 | case _adapter_rot_args: |
twisti@2903 | 2637 | case _adapter_collect_args: |
twisti@2903 | 2638 | case _adapter_fold_args: |
twisti@2903 | 2639 | case _adapter_spread_args: |
twisti@2903 | 2640 | // should be handled completely by optimized cases; see above |
twisti@2903 | 2641 | err = "init_AdapterMethodHandle should not issue this"; |
twisti@2903 | 2642 | break; |
twisti@2903 | 2643 | } |
twisti@2903 | 2644 | } |
twisti@2903 | 2645 | |
jrose@1145 | 2646 | if (err != NULL) { |
never@2950 | 2647 | throw_InternalError_for_bad_conversion(conversion, err_msg("%s: conv_op %d ek_opt %d", err, conv_op, ek_opt), THREAD); |
jrose@1145 | 2648 | return; |
jrose@1145 | 2649 | } |
jrose@1145 | 2650 | |
jrose@1145 | 2651 | // Rebuild the conversion value; maybe parts of it were changed. |
jrose@1145 | 2652 | jint new_conversion = adapter_conversion(conv_op, src, dest, stack_move, vminfo); |
jrose@1145 | 2653 | |
jrose@1145 | 2654 | // Finalize the conversion field. (Note that it is final to Java code.) |
jrose@2639 | 2655 | java_lang_invoke_AdapterMethodHandle::set_conversion(mh(), new_conversion); |
jrose@1145 | 2656 | |
never@3105 | 2657 | if (java_lang_invoke_CountingMethodHandle::is_instance(mh())) { |
never@3105 | 2658 | assert(ek_orig == _adapter_retype_only, "only one handled"); |
never@3105 | 2659 | ek_opt = _adapter_opt_profiling; |
never@3105 | 2660 | } |
never@3105 | 2661 | |
jrose@1145 | 2662 | // Done! |
jrose@2639 | 2663 | java_lang_invoke_MethodHandle::set_vmentry(mh(), entry(ek_opt)); |
jrose@1145 | 2664 | |
jrose@1145 | 2665 | // There should be enough memory barriers on exit from native methods |
jrose@1145 | 2666 | // to ensure that the MH is fully initialized to all threads before |
jrose@1145 | 2667 | // Java code can publish it in global data structures. |
jrose@1145 | 2668 | } |
jrose@1145 | 2669 | |
never@2895 | 2670 | void MethodHandles::ensure_vmlayout_field(Handle target, TRAPS) { |
never@2895 | 2671 | Handle mtype(THREAD, java_lang_invoke_MethodHandle::type(target())); |
never@2895 | 2672 | Handle mtform(THREAD, java_lang_invoke_MethodType::form(mtype())); |
never@2895 | 2673 | if (mtform.is_null()) { THROW(vmSymbols::java_lang_InternalError()); } |
never@2895 | 2674 | if (java_lang_invoke_MethodTypeForm::vmlayout_offset_in_bytes() > 0) { |
never@2895 | 2675 | if (java_lang_invoke_MethodTypeForm::vmlayout(mtform()) == NULL) { |
never@2895 | 2676 | // fill it in |
never@2895 | 2677 | Handle erased_mtype(THREAD, java_lang_invoke_MethodTypeForm::erasedType(mtform())); |
never@2895 | 2678 | TempNewSymbol erased_signature |
never@2895 | 2679 | = java_lang_invoke_MethodType::as_signature(erased_mtype(), /*intern:*/true, CHECK); |
never@2895 | 2680 | methodOop cookie |
never@2895 | 2681 | = SystemDictionary::find_method_handle_invoke(vmSymbols::invokeExact_name(), |
never@2895 | 2682 | erased_signature, |
never@2895 | 2683 | SystemDictionaryHandles::Object_klass(), |
never@2895 | 2684 | THREAD); |
never@2895 | 2685 | java_lang_invoke_MethodTypeForm::init_vmlayout(mtform(), cookie); |
never@2895 | 2686 | } |
never@2895 | 2687 | } |
never@3137 | 2688 | assert(java_lang_invoke_MethodTypeForm::vmslots(mtform()) == argument_slot_count(mtype()), "must agree"); |
never@2895 | 2689 | } |
never@2895 | 2690 | |
never@2920 | 2691 | #ifdef ASSERT |
never@2920 | 2692 | |
never@2920 | 2693 | extern "C" |
never@2920 | 2694 | void print_method_handle(oop mh); |
never@2920 | 2695 | |
never@2920 | 2696 | static void stress_method_handle_walk_impl(Handle mh, TRAPS) { |
never@2920 | 2697 | if (StressMethodHandleWalk) { |
never@2920 | 2698 | // Exercise the MethodHandleWalk code in various ways and validate |
never@2920 | 2699 | // the resulting method oop. Some of these produce output so they |
never@2920 | 2700 | // are guarded under Verbose. |
never@2920 | 2701 | ResourceMark rm; |
never@2920 | 2702 | HandleMark hm; |
never@2920 | 2703 | if (Verbose) { |
never@2920 | 2704 | print_method_handle(mh()); |
never@2920 | 2705 | } |
never@2920 | 2706 | TempNewSymbol name = SymbolTable::new_symbol("invoke", CHECK); |
never@2920 | 2707 | Handle mt = java_lang_invoke_MethodHandle::type(mh()); |
never@2920 | 2708 | TempNewSymbol signature = java_lang_invoke_MethodType::as_signature(mt(), true, CHECK); |
never@2920 | 2709 | MethodHandleCompiler mhc(mh, name, signature, 10000, false, CHECK); |
never@2920 | 2710 | methodHandle m = mhc.compile(CHECK); |
never@2920 | 2711 | if (Verbose) { |
never@2920 | 2712 | m->print_codes(); |
never@2920 | 2713 | } |
never@2920 | 2714 | InterpreterOopMap mask; |
never@2920 | 2715 | OopMapCache::compute_one_oop_map(m, m->code_size() - 1, &mask); |
jrose@2982 | 2716 | // compile to object code if -Xcomp or WizardMode |
jrose@2982 | 2717 | if ((WizardMode || |
jrose@2982 | 2718 | CompilationPolicy::must_be_compiled(m)) |
jrose@2982 | 2719 | && !instanceKlass::cast(m->method_holder())->is_not_initialized() |
jrose@2982 | 2720 | && CompilationPolicy::can_be_compiled(m)) { |
jrose@2982 | 2721 | // Force compilation |
jrose@2982 | 2722 | CompileBroker::compile_method(m, InvocationEntryBci, |
iveresov@3035 | 2723 | CompilationPolicy::policy()->initial_compile_level(), |
jrose@2982 | 2724 | methodHandle(), 0, "StressMethodHandleWalk", |
jrose@2982 | 2725 | CHECK); |
jrose@2982 | 2726 | } |
never@2920 | 2727 | } |
never@2920 | 2728 | } |
never@2920 | 2729 | |
never@2920 | 2730 | static void stress_method_handle_walk(Handle mh, TRAPS) { |
never@2920 | 2731 | stress_method_handle_walk_impl(mh, THREAD); |
never@2920 | 2732 | if (HAS_PENDING_EXCEPTION) { |
never@2920 | 2733 | oop ex = PENDING_EXCEPTION; |
never@2920 | 2734 | CLEAR_PENDING_EXCEPTION; |
never@2920 | 2735 | tty->print("StressMethodHandleWalk: "); |
never@2920 | 2736 | java_lang_Throwable::print(ex, tty); |
never@2920 | 2737 | tty->cr(); |
never@2920 | 2738 | } |
never@2920 | 2739 | } |
never@2920 | 2740 | #else |
never@2920 | 2741 | |
never@2920 | 2742 | static void stress_method_handle_walk(Handle mh, TRAPS) {} |
never@2920 | 2743 | |
never@2920 | 2744 | #endif |
never@2920 | 2745 | |
jrose@1145 | 2746 | // |
jrose@2639 | 2747 | // Here are the native methods on sun.invoke.MethodHandleImpl. |
jrose@1145 | 2748 | // They are the private interface between this JVM and the HotSpot-specific |
jrose@1145 | 2749 | // Java code that implements JSR 292 method handles. |
jrose@1145 | 2750 | // |
jrose@1145 | 2751 | // Note: We use a JVM_ENTRY macro to define each of these, for this is the way |
jrose@1145 | 2752 | // that intrinsic (non-JNI) native methods are defined in HotSpot. |
jrose@1145 | 2753 | // |
jrose@1145 | 2754 | |
jrose@1145 | 2755 | // direct method handles for invokestatic or invokespecial |
jrose@1145 | 2756 | // void init(DirectMethodHandle self, MemberName ref, boolean doDispatch, Class<?> caller); |
jrose@2639 | 2757 | JVM_ENTRY(void, MHN_init_DMH(JNIEnv *env, jobject igcls, jobject mh_jh, |
jrose@1145 | 2758 | jobject target_jh, jboolean do_dispatch, jobject caller_jh)) { |
jrose@1145 | 2759 | ResourceMark rm; // for error messages |
jrose@1145 | 2760 | |
jrose@1145 | 2761 | // This is the guy we are initializing: |
never@2937 | 2762 | if (mh_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "self is null"); } |
jrose@1145 | 2763 | Handle mh(THREAD, JNIHandles::resolve_non_null(mh_jh)); |
jrose@1145 | 2764 | |
jrose@1145 | 2765 | // Early returns out of this method leave the DMH in an unfinished state. |
jrose@2639 | 2766 | assert(java_lang_invoke_MethodHandle::vmentry(mh()) == NULL, "must be safely null"); |
jrose@1145 | 2767 | |
jrose@1145 | 2768 | // which method are we really talking about? |
never@2937 | 2769 | if (target_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "target is null"); } |
twisti@2806 | 2770 | Handle target(THREAD, JNIHandles::resolve_non_null(target_jh)); |
twisti@2806 | 2771 | if (java_lang_invoke_MemberName::is_instance(target()) && |
twisti@2806 | 2772 | java_lang_invoke_MemberName::vmindex(target()) == VM_INDEX_UNINITIALIZED) { |
twisti@2806 | 2773 | MethodHandles::resolve_MemberName(target, CHECK); |
jrose@1145 | 2774 | } |
jrose@1145 | 2775 | |
twisti@2806 | 2776 | KlassHandle receiver_limit; int decode_flags = 0; |
twisti@2806 | 2777 | methodHandle m = MethodHandles::decode_method(target(), receiver_limit, decode_flags); |
jrose@1145 | 2778 | if (m.is_null()) { THROW_MSG(vmSymbols::java_lang_InternalError(), "no such method"); } |
jrose@1145 | 2779 | |
jrose@1145 | 2780 | // The trusted Java code that calls this method should already have performed |
jrose@1145 | 2781 | // access checks on behalf of the given caller. But, we can verify this. |
jrose@1145 | 2782 | if (VerifyMethodHandles && caller_jh != NULL) { |
jrose@1145 | 2783 | KlassHandle caller(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(caller_jh))); |
jrose@1145 | 2784 | // If this were a bytecode, the first access check would be against |
jrose@1145 | 2785 | // the "reference class" mentioned in the CONSTANT_Methodref. |
jrose@1862 | 2786 | // We don't know at this point which class that was, and if we |
jrose@1862 | 2787 | // check against m.method_holder we might get the wrong answer. |
jrose@1862 | 2788 | // So we just make sure to handle this check when the resolution |
jrose@1862 | 2789 | // happens, when we call resolve_MemberName. |
jrose@1862 | 2790 | // |
jrose@1862 | 2791 | // (A public class can inherit public members from private supers, |
jrose@1862 | 2792 | // and it would be wrong to check access against the private super |
jrose@1862 | 2793 | // if the original symbolic reference was against the public class.) |
jrose@1862 | 2794 | // |
jrose@1145 | 2795 | // If there were a bytecode, the next step would be to lookup the method |
jrose@1145 | 2796 | // in the reference class, then then check the method's access bits. |
jrose@1145 | 2797 | // Emulate LinkResolver::check_method_accessability. |
jrose@1145 | 2798 | klassOop resolved_klass = m->method_holder(); |
jrose@1145 | 2799 | if (!Reflection::verify_field_access(caller->as_klassOop(), |
jrose@1862 | 2800 | resolved_klass, resolved_klass, |
jrose@1145 | 2801 | m->access_flags(), |
jrose@1145 | 2802 | true)) { |
jrose@1145 | 2803 | // %%% following cutout belongs in Reflection::verify_field_access? |
jrose@1145 | 2804 | bool same_pm = Reflection::is_same_package_member(caller->as_klassOop(), |
jrose@1862 | 2805 | resolved_klass, THREAD); |
jrose@1145 | 2806 | if (!same_pm) { |
jrose@1145 | 2807 | THROW_MSG(vmSymbols::java_lang_InternalError(), m->name_and_sig_as_C_string()); |
jrose@1145 | 2808 | } |
jrose@1145 | 2809 | } |
jrose@1145 | 2810 | } |
jrose@1145 | 2811 | |
jrose@1145 | 2812 | MethodHandles::init_DirectMethodHandle(mh, m, (do_dispatch != JNI_FALSE), CHECK); |
never@2920 | 2813 | stress_method_handle_walk(mh, CHECK); |
jrose@1145 | 2814 | } |
jrose@1145 | 2815 | JVM_END |
jrose@1145 | 2816 | |
jrose@1145 | 2817 | // bound method handles |
jrose@2639 | 2818 | JVM_ENTRY(void, MHN_init_BMH(JNIEnv *env, jobject igcls, jobject mh_jh, |
jrose@1145 | 2819 | jobject target_jh, int argnum)) { |
jrose@1145 | 2820 | ResourceMark rm; // for error messages |
jrose@1145 | 2821 | |
jrose@1145 | 2822 | // This is the guy we are initializing: |
never@2937 | 2823 | if (mh_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "self is null"); } |
jrose@1145 | 2824 | Handle mh(THREAD, JNIHandles::resolve_non_null(mh_jh)); |
jrose@1145 | 2825 | |
jrose@1145 | 2826 | // Early returns out of this method leave the BMH in an unfinished state. |
jrose@2639 | 2827 | assert(java_lang_invoke_MethodHandle::vmentry(mh()) == NULL, "must be safely null"); |
jrose@1145 | 2828 | |
never@2937 | 2829 | if (target_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "target is null"); } |
jrose@1145 | 2830 | Handle target(THREAD, JNIHandles::resolve_non_null(target_jh)); |
jrose@1145 | 2831 | |
jrose@2639 | 2832 | if (!java_lang_invoke_MethodHandle::is_instance(target())) { |
jrose@1145 | 2833 | // Target object is a reflective method. (%%% Do we need this alternate path?) |
jrose@1145 | 2834 | Untested("init_BMH of non-MH"); |
jrose@1145 | 2835 | if (argnum != 0) { THROW(vmSymbols::java_lang_InternalError()); } |
twisti@2806 | 2836 | KlassHandle receiver_limit; int decode_flags = 0; |
twisti@2806 | 2837 | methodHandle m = MethodHandles::decode_method(target(), receiver_limit, decode_flags); |
jrose@1145 | 2838 | MethodHandles::init_BoundMethodHandle_with_receiver(mh, m, |
jrose@1145 | 2839 | receiver_limit, |
jrose@1145 | 2840 | decode_flags, |
jrose@1145 | 2841 | CHECK); |
never@2920 | 2842 | } else { |
never@2920 | 2843 | // Build a BMH on top of a DMH or another BMH: |
never@2920 | 2844 | MethodHandles::init_BoundMethodHandle(mh, target, argnum, CHECK); |
jrose@1145 | 2845 | } |
jrose@2982 | 2846 | |
jrose@2982 | 2847 | if (StressMethodHandleWalk) { |
jrose@2982 | 2848 | if (mh->klass() == SystemDictionary::BoundMethodHandle_klass()) |
jrose@2982 | 2849 | stress_method_handle_walk(mh, CHECK); |
jrose@2982 | 2850 | // else don't, since the subclass has not yet initialized its own fields |
jrose@2982 | 2851 | } |
jrose@1145 | 2852 | } |
jrose@1145 | 2853 | JVM_END |
jrose@1145 | 2854 | |
jrose@1145 | 2855 | // adapter method handles |
jrose@2639 | 2856 | JVM_ENTRY(void, MHN_init_AMH(JNIEnv *env, jobject igcls, jobject mh_jh, |
jrose@1145 | 2857 | jobject target_jh, int argnum)) { |
jrose@1145 | 2858 | // This is the guy we are initializing: |
never@2937 | 2859 | if (mh_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "self is null"); } |
never@2937 | 2860 | if (target_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "target is null"); } |
jrose@1145 | 2861 | Handle mh(THREAD, JNIHandles::resolve_non_null(mh_jh)); |
jrose@1145 | 2862 | Handle target(THREAD, JNIHandles::resolve_non_null(target_jh)); |
jrose@1145 | 2863 | |
jrose@1145 | 2864 | // Early returns out of this method leave the AMH in an unfinished state. |
jrose@2639 | 2865 | assert(java_lang_invoke_MethodHandle::vmentry(mh()) == NULL, "must be safely null"); |
jrose@1145 | 2866 | |
jrose@1145 | 2867 | MethodHandles::init_AdapterMethodHandle(mh, target, argnum, CHECK); |
never@2920 | 2868 | stress_method_handle_walk(mh, CHECK); |
jrose@1145 | 2869 | } |
jrose@1145 | 2870 | JVM_END |
jrose@1145 | 2871 | |
jrose@1145 | 2872 | // method type forms |
jrose@2639 | 2873 | JVM_ENTRY(void, MHN_init_MT(JNIEnv *env, jobject igcls, jobject erased_jh)) { |
jrose@1145 | 2874 | if (erased_jh == NULL) return; |
jrose@1145 | 2875 | if (TraceMethodHandles) { |
jrose@1145 | 2876 | tty->print("creating MethodType form "); |
jrose@1145 | 2877 | if (WizardMode || Verbose) { // Warning: this calls Java code on the MH! |
jrose@1145 | 2878 | // call Object.toString() |
coleenp@2497 | 2879 | Symbol* name = vmSymbols::toString_name(); |
coleenp@2497 | 2880 | Symbol* sig = vmSymbols::void_string_signature(); |
jrose@1145 | 2881 | JavaCallArguments args(Handle(THREAD, JNIHandles::resolve_non_null(erased_jh))); |
jrose@1145 | 2882 | JavaValue result(T_OBJECT); |
never@1577 | 2883 | JavaCalls::call_virtual(&result, SystemDictionary::Object_klass(), name, sig, |
jrose@1145 | 2884 | &args, CHECK); |
jrose@1145 | 2885 | Handle str(THREAD, (oop)result.get_jobject()); |
jrose@1145 | 2886 | java_lang_String::print(str, tty); |
jrose@1145 | 2887 | } |
jrose@1145 | 2888 | tty->cr(); |
jrose@1145 | 2889 | } |
jrose@1145 | 2890 | } |
jrose@1145 | 2891 | JVM_END |
jrose@1145 | 2892 | |
jrose@1145 | 2893 | // debugging and reflection |
jrose@2639 | 2894 | JVM_ENTRY(jobject, MHN_getTarget(JNIEnv *env, jobject igcls, jobject mh_jh, jint format)) { |
jrose@1145 | 2895 | Handle mh(THREAD, JNIHandles::resolve(mh_jh)); |
jrose@2639 | 2896 | if (!java_lang_invoke_MethodHandle::is_instance(mh())) { |
jrose@1145 | 2897 | THROW_NULL(vmSymbols::java_lang_IllegalArgumentException()); |
jrose@1145 | 2898 | } |
jrose@1145 | 2899 | oop target = MethodHandles::encode_target(mh, format, CHECK_NULL); |
jrose@1145 | 2900 | return JNIHandles::make_local(THREAD, target); |
jrose@1145 | 2901 | } |
jrose@1145 | 2902 | JVM_END |
jrose@1145 | 2903 | |
jrose@2639 | 2904 | JVM_ENTRY(jint, MHN_getConstant(JNIEnv *env, jobject igcls, jint which)) { |
jrose@1145 | 2905 | switch (which) { |
jrose@1145 | 2906 | case MethodHandles::GC_JVM_PUSH_LIMIT: |
jrose@1145 | 2907 | guarantee(MethodHandlePushLimit >= 2 && MethodHandlePushLimit <= 0xFF, |
jrose@1145 | 2908 | "MethodHandlePushLimit parameter must be in valid range"); |
jrose@1145 | 2909 | return MethodHandlePushLimit; |
jrose@1474 | 2910 | case MethodHandles::GC_JVM_STACK_MOVE_UNIT: |
jrose@1145 | 2911 | // return number of words per slot, signed according to stack direction |
jrose@1145 | 2912 | return MethodHandles::stack_move_unit(); |
jrose@1862 | 2913 | case MethodHandles::GC_CONV_OP_IMPLEMENTED_MASK: |
jrose@1862 | 2914 | return MethodHandles::adapter_conversion_ops_supported_mask(); |
never@3105 | 2915 | case MethodHandles::GC_COUNT_GWT: |
never@3105 | 2916 | #ifdef COMPILER2 |
never@3105 | 2917 | return true; |
never@3105 | 2918 | #else |
never@3105 | 2919 | return false; |
never@3105 | 2920 | #endif |
jrose@1145 | 2921 | } |
jrose@1145 | 2922 | return 0; |
jrose@1145 | 2923 | } |
jrose@1145 | 2924 | JVM_END |
jrose@1145 | 2925 | |
jrose@1145 | 2926 | #ifndef PRODUCT |
jrose@1145 | 2927 | #define EACH_NAMED_CON(template) \ |
never@2895 | 2928 | /* hold back this one until JDK stabilizes */ \ |
never@2895 | 2929 | /* template(MethodHandles,GC_JVM_PUSH_LIMIT) */ \ |
never@2895 | 2930 | /* hold back this one until JDK stabilizes */ \ |
never@2895 | 2931 | /* template(MethodHandles,GC_JVM_STACK_MOVE_UNIT) */ \ |
never@2954 | 2932 | /* hold back this one until JDK stabilizes */ \ |
never@2954 | 2933 | /* template(MethodHandles,GC_OP_ROT_ARGS_DOWN_LIMIT_BIAS) */ \ |
jrose@1145 | 2934 | template(MethodHandles,ETF_HANDLE_OR_METHOD_NAME) \ |
jrose@1145 | 2935 | template(MethodHandles,ETF_DIRECT_HANDLE) \ |
jrose@1145 | 2936 | template(MethodHandles,ETF_METHOD_NAME) \ |
jrose@1145 | 2937 | template(MethodHandles,ETF_REFLECT_METHOD) \ |
jrose@2639 | 2938 | template(java_lang_invoke_MemberName,MN_IS_METHOD) \ |
jrose@2639 | 2939 | template(java_lang_invoke_MemberName,MN_IS_CONSTRUCTOR) \ |
jrose@2639 | 2940 | template(java_lang_invoke_MemberName,MN_IS_FIELD) \ |
jrose@2639 | 2941 | template(java_lang_invoke_MemberName,MN_IS_TYPE) \ |
jrose@2639 | 2942 | template(java_lang_invoke_MemberName,MN_SEARCH_SUPERCLASSES) \ |
jrose@2639 | 2943 | template(java_lang_invoke_MemberName,MN_SEARCH_INTERFACES) \ |
jrose@2639 | 2944 | template(java_lang_invoke_MemberName,VM_INDEX_UNINITIALIZED) \ |
jrose@2639 | 2945 | template(java_lang_invoke_AdapterMethodHandle,OP_RETYPE_ONLY) \ |
jrose@2639 | 2946 | template(java_lang_invoke_AdapterMethodHandle,OP_RETYPE_RAW) \ |
jrose@2639 | 2947 | template(java_lang_invoke_AdapterMethodHandle,OP_CHECK_CAST) \ |
jrose@2639 | 2948 | template(java_lang_invoke_AdapterMethodHandle,OP_PRIM_TO_PRIM) \ |
jrose@2639 | 2949 | template(java_lang_invoke_AdapterMethodHandle,OP_REF_TO_PRIM) \ |
jrose@2639 | 2950 | template(java_lang_invoke_AdapterMethodHandle,OP_PRIM_TO_REF) \ |
jrose@2639 | 2951 | template(java_lang_invoke_AdapterMethodHandle,OP_SWAP_ARGS) \ |
jrose@2639 | 2952 | template(java_lang_invoke_AdapterMethodHandle,OP_ROT_ARGS) \ |
jrose@2639 | 2953 | template(java_lang_invoke_AdapterMethodHandle,OP_DUP_ARGS) \ |
jrose@2639 | 2954 | template(java_lang_invoke_AdapterMethodHandle,OP_DROP_ARGS) \ |
jrose@2639 | 2955 | template(java_lang_invoke_AdapterMethodHandle,OP_COLLECT_ARGS) \ |
jrose@2639 | 2956 | template(java_lang_invoke_AdapterMethodHandle,OP_SPREAD_ARGS) \ |
never@2895 | 2957 | /* hold back this one until JDK stabilizes */ \ |
never@2895 | 2958 | /*template(java_lang_invoke_AdapterMethodHandle,CONV_OP_LIMIT)*/ \ |
jrose@2639 | 2959 | template(java_lang_invoke_AdapterMethodHandle,CONV_OP_MASK) \ |
jrose@2639 | 2960 | template(java_lang_invoke_AdapterMethodHandle,CONV_VMINFO_MASK) \ |
jrose@2639 | 2961 | template(java_lang_invoke_AdapterMethodHandle,CONV_VMINFO_SHIFT) \ |
jrose@2639 | 2962 | template(java_lang_invoke_AdapterMethodHandle,CONV_OP_SHIFT) \ |
jrose@2639 | 2963 | template(java_lang_invoke_AdapterMethodHandle,CONV_DEST_TYPE_SHIFT) \ |
jrose@2639 | 2964 | template(java_lang_invoke_AdapterMethodHandle,CONV_SRC_TYPE_SHIFT) \ |
jrose@2639 | 2965 | template(java_lang_invoke_AdapterMethodHandle,CONV_STACK_MOVE_SHIFT) \ |
jrose@2639 | 2966 | template(java_lang_invoke_AdapterMethodHandle,CONV_STACK_MOVE_MASK) \ |
jrose@1145 | 2967 | /*end*/ |
jrose@1145 | 2968 | |
jrose@1145 | 2969 | #define ONE_PLUS(scope,value) 1+ |
jrose@1145 | 2970 | static const int con_value_count = EACH_NAMED_CON(ONE_PLUS) 0; |
jrose@1145 | 2971 | #define VALUE_COMMA(scope,value) scope::value, |
jrose@1145 | 2972 | static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA) 0 }; |
jrose@1145 | 2973 | #define STRING_NULL(scope,value) #value "\0" |
jrose@1145 | 2974 | static const char con_names[] = { EACH_NAMED_CON(STRING_NULL) }; |
jrose@1145 | 2975 | |
jrose@1145 | 2976 | #undef ONE_PLUS |
jrose@1145 | 2977 | #undef VALUE_COMMA |
jrose@1145 | 2978 | #undef STRING_NULL |
jrose@1145 | 2979 | #undef EACH_NAMED_CON |
jrose@1145 | 2980 | #endif |
jrose@1145 | 2981 | |
jrose@2639 | 2982 | JVM_ENTRY(jint, MHN_getNamedCon(JNIEnv *env, jobject igcls, jint which, jobjectArray box_jh)) { |
jrose@1145 | 2983 | #ifndef PRODUCT |
jrose@1145 | 2984 | if (which >= 0 && which < con_value_count) { |
jrose@1145 | 2985 | int con = con_values[which]; |
twisti@2806 | 2986 | objArrayHandle box(THREAD, (objArrayOop) JNIHandles::resolve(box_jh)); |
twisti@2806 | 2987 | if (box.not_null() && box->klass() == Universe::objectArrayKlassObj() && box->length() > 0) { |
jrose@1145 | 2988 | const char* str = &con_names[0]; |
jrose@1145 | 2989 | for (int i = 0; i < which; i++) |
jrose@1145 | 2990 | str += strlen(str) + 1; // skip name and null |
twisti@2806 | 2991 | oop name = java_lang_String::create_oop_from_str(str, CHECK_0); // possible safepoint |
jrose@1145 | 2992 | box->obj_at_put(0, name); |
jrose@1145 | 2993 | } |
jrose@1145 | 2994 | return con; |
jrose@1145 | 2995 | } |
jrose@1145 | 2996 | #endif |
jrose@1145 | 2997 | return 0; |
jrose@1145 | 2998 | } |
jrose@1145 | 2999 | JVM_END |
jrose@1145 | 3000 | |
jrose@1145 | 3001 | // void init(MemberName self, AccessibleObject ref) |
jrose@2639 | 3002 | JVM_ENTRY(void, MHN_init_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jobject target_jh)) { |
never@2937 | 3003 | if (mname_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); } |
never@2937 | 3004 | if (target_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "target is null"); } |
jrose@1145 | 3005 | Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
jrose@1145 | 3006 | oop target_oop = JNIHandles::resolve_non_null(target_jh); |
jrose@1145 | 3007 | MethodHandles::init_MemberName(mname(), target_oop); |
jrose@1145 | 3008 | } |
jrose@1145 | 3009 | JVM_END |
jrose@1145 | 3010 | |
jrose@1145 | 3011 | // void expand(MemberName self) |
jrose@2639 | 3012 | JVM_ENTRY(void, MHN_expand_Mem(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
never@2937 | 3013 | if (mname_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); } |
jrose@1145 | 3014 | Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
jrose@1145 | 3015 | MethodHandles::expand_MemberName(mname, 0, CHECK); |
jrose@1145 | 3016 | } |
jrose@1145 | 3017 | JVM_END |
jrose@1145 | 3018 | |
jrose@1145 | 3019 | // void resolve(MemberName self, Class<?> caller) |
jrose@2639 | 3020 | JVM_ENTRY(void, MHN_resolve_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jclass caller_jh)) { |
never@2937 | 3021 | if (mname_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); } |
jrose@1145 | 3022 | Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
jrose@1862 | 3023 | |
jrose@1862 | 3024 | // The trusted Java code that calls this method should already have performed |
jrose@1862 | 3025 | // access checks on behalf of the given caller. But, we can verify this. |
jrose@1862 | 3026 | if (VerifyMethodHandles && caller_jh != NULL) { |
jrose@2639 | 3027 | klassOop reference_klass = java_lang_Class::as_klassOop(java_lang_invoke_MemberName::clazz(mname())); |
jrose@1862 | 3028 | if (reference_klass != NULL) { |
jrose@1862 | 3029 | // Emulate LinkResolver::check_klass_accessability. |
jrose@1862 | 3030 | klassOop caller = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(caller_jh)); |
jrose@1862 | 3031 | if (!Reflection::verify_class_access(caller, |
jrose@1862 | 3032 | reference_klass, |
jrose@1862 | 3033 | true)) { |
jrose@1862 | 3034 | THROW_MSG(vmSymbols::java_lang_InternalError(), Klass::cast(reference_klass)->external_name()); |
jrose@1862 | 3035 | } |
jrose@1862 | 3036 | } |
jrose@1862 | 3037 | } |
jrose@1862 | 3038 | |
jrose@1145 | 3039 | MethodHandles::resolve_MemberName(mname, CHECK); |
jrose@1145 | 3040 | } |
jrose@1145 | 3041 | JVM_END |
jrose@1145 | 3042 | |
jrose@1145 | 3043 | // static native int getMembers(Class<?> defc, String matchName, String matchSig, |
jrose@1145 | 3044 | // int matchFlags, Class<?> caller, int skip, MemberName[] results); |
jrose@2639 | 3045 | JVM_ENTRY(jint, MHN_getMembers(JNIEnv *env, jobject igcls, |
jrose@1145 | 3046 | jclass clazz_jh, jstring name_jh, jstring sig_jh, |
jrose@1145 | 3047 | int mflags, jclass caller_jh, jint skip, jobjectArray results_jh)) { |
jrose@1145 | 3048 | if (clazz_jh == NULL || results_jh == NULL) return -1; |
twisti@2806 | 3049 | KlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz_jh))); |
jrose@1145 | 3050 | |
twisti@2806 | 3051 | objArrayHandle results(THREAD, (objArrayOop) JNIHandles::resolve(results_jh)); |
twisti@2806 | 3052 | if (results.is_null() || !results->is_objArray()) return -1; |
jrose@1145 | 3053 | |
coleenp@2497 | 3054 | TempNewSymbol name = NULL; |
coleenp@2497 | 3055 | TempNewSymbol sig = NULL; |
jrose@1145 | 3056 | if (name_jh != NULL) { |
jrose@1145 | 3057 | name = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(name_jh)); |
jrose@1145 | 3058 | if (name == NULL) return 0; // a match is not possible |
jrose@1145 | 3059 | } |
jrose@1145 | 3060 | if (sig_jh != NULL) { |
jrose@1145 | 3061 | sig = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(sig_jh)); |
jrose@1145 | 3062 | if (sig == NULL) return 0; // a match is not possible |
jrose@1145 | 3063 | } |
jrose@1145 | 3064 | |
twisti@2806 | 3065 | KlassHandle caller; |
jrose@1145 | 3066 | if (caller_jh != NULL) { |
jrose@1145 | 3067 | oop caller_oop = JNIHandles::resolve_non_null(caller_jh); |
jrose@1145 | 3068 | if (!java_lang_Class::is_instance(caller_oop)) return -1; |
twisti@2806 | 3069 | caller = KlassHandle(THREAD, java_lang_Class::as_klassOop(caller_oop)); |
jrose@1145 | 3070 | } |
jrose@1145 | 3071 | |
twisti@2806 | 3072 | if (name != NULL && sig != NULL && results.not_null()) { |
jrose@1145 | 3073 | // try a direct resolve |
jrose@1145 | 3074 | // %%% TO DO |
jrose@1145 | 3075 | } |
jrose@1145 | 3076 | |
twisti@2806 | 3077 | int res = MethodHandles::find_MemberNames(k(), name, sig, mflags, |
twisti@2806 | 3078 | caller(), skip, results()); |
jrose@1145 | 3079 | // TO DO: expand at least some of the MemberNames, to avoid massive callbacks |
jrose@1145 | 3080 | return res; |
jrose@1145 | 3081 | } |
jrose@1145 | 3082 | JVM_END |
jrose@1145 | 3083 | |
twisti@3131 | 3084 | JVM_ENTRY(void, MHN_setCallSiteTargetNormal(JNIEnv* env, jobject igcls, jobject call_site_jh, jobject target_jh)) { |
twisti@3239 | 3085 | Handle call_site(THREAD, JNIHandles::resolve_non_null(call_site_jh)); |
twisti@3239 | 3086 | Handle target (THREAD, JNIHandles::resolve(target_jh)); |
twisti@3131 | 3087 | { |
twisti@3131 | 3088 | // Walk all nmethods depending on this call site. |
twisti@3131 | 3089 | MutexLocker mu(Compile_lock, thread); |
twisti@3131 | 3090 | Universe::flush_dependents_on(call_site, target); |
twisti@3131 | 3091 | } |
twisti@3239 | 3092 | java_lang_invoke_CallSite::set_target(call_site(), target()); |
twisti@3131 | 3093 | } |
twisti@3131 | 3094 | JVM_END |
twisti@3131 | 3095 | |
twisti@3131 | 3096 | JVM_ENTRY(void, MHN_setCallSiteTargetVolatile(JNIEnv* env, jobject igcls, jobject call_site_jh, jobject target_jh)) { |
twisti@3239 | 3097 | Handle call_site(THREAD, JNIHandles::resolve_non_null(call_site_jh)); |
twisti@3239 | 3098 | Handle target (THREAD, JNIHandles::resolve(target_jh)); |
twisti@3131 | 3099 | { |
twisti@3131 | 3100 | // Walk all nmethods depending on this call site. |
twisti@3131 | 3101 | MutexLocker mu(Compile_lock, thread); |
twisti@3131 | 3102 | Universe::flush_dependents_on(call_site, target); |
twisti@3131 | 3103 | } |
twisti@3239 | 3104 | java_lang_invoke_CallSite::set_target_volatile(call_site(), target()); |
twisti@3131 | 3105 | } |
twisti@3131 | 3106 | JVM_END |
twisti@3131 | 3107 | |
jrose@2941 | 3108 | methodOop MethodHandles::resolve_raise_exception_method(TRAPS) { |
jrose@2941 | 3109 | if (_raise_exception_method != NULL) { |
jrose@2941 | 3110 | // no need to do it twice |
jrose@2941 | 3111 | return raise_exception_method(); |
jrose@2941 | 3112 | } |
jrose@2941 | 3113 | // LinkResolver::resolve_invokedynamic can reach this point |
jrose@2941 | 3114 | // because an invokedynamic has failed very early (7049415) |
jrose@2941 | 3115 | KlassHandle MHN_klass = SystemDictionaryHandles::MethodHandleNatives_klass(); |
jrose@2941 | 3116 | if (MHN_klass.not_null()) { |
jrose@2941 | 3117 | TempNewSymbol raiseException_name = SymbolTable::new_symbol("raiseException", CHECK_NULL); |
jrose@2941 | 3118 | TempNewSymbol raiseException_sig = SymbolTable::new_symbol("(ILjava/lang/Object;Ljava/lang/Object;)V", CHECK_NULL); |
jrose@2941 | 3119 | methodOop raiseException_method = instanceKlass::cast(MHN_klass->as_klassOop()) |
jrose@2941 | 3120 | ->find_method(raiseException_name, raiseException_sig); |
jrose@2941 | 3121 | if (raiseException_method != NULL && raiseException_method->is_static()) { |
jrose@2941 | 3122 | return raiseException_method; |
jrose@2941 | 3123 | } |
jrose@2941 | 3124 | } |
jrose@2941 | 3125 | // not found; let the caller deal with it |
jrose@2941 | 3126 | return NULL; |
jrose@2941 | 3127 | } |
jrose@2941 | 3128 | void MethodHandles::raise_exception(int code, oop actual, oop required, TRAPS) { |
jrose@2941 | 3129 | methodOop raiseException_method = resolve_raise_exception_method(CHECK); |
jrose@2941 | 3130 | if (raiseException_method != NULL && |
jrose@2941 | 3131 | instanceKlass::cast(raiseException_method->method_holder())->is_not_initialized()) { |
jrose@2941 | 3132 | instanceKlass::cast(raiseException_method->method_holder())->initialize(CHECK); |
jrose@2941 | 3133 | // it had better be resolved by now, or maybe JSR 292 failed to load |
jrose@2941 | 3134 | raiseException_method = raise_exception_method(); |
jrose@2941 | 3135 | } |
jrose@2941 | 3136 | if (raiseException_method == NULL) { |
jrose@2941 | 3137 | THROW_MSG(vmSymbols::java_lang_InternalError(), "no raiseException method"); |
jrose@2941 | 3138 | } |
jrose@2941 | 3139 | JavaCallArguments args; |
jrose@2941 | 3140 | args.push_int(code); |
jrose@2941 | 3141 | args.push_oop(actual); |
jrose@2941 | 3142 | args.push_oop(required); |
jrose@2941 | 3143 | JavaValue result(T_VOID); |
jrose@2941 | 3144 | JavaCalls::call(&result, raiseException_method, &args, CHECK); |
jrose@2941 | 3145 | } |
jrose@2941 | 3146 | |
jrose@2919 | 3147 | JVM_ENTRY(jobject, MH_invoke_UOE(JNIEnv *env, jobject igmh, jobjectArray igargs)) { |
jrose@2919 | 3148 | TempNewSymbol UOE_name = SymbolTable::new_symbol("java/lang/UnsupportedOperationException", CHECK_NULL); |
jrose@2919 | 3149 | THROW_MSG_NULL(UOE_name, "MethodHandle.invoke cannot be invoked reflectively"); |
jrose@2919 | 3150 | return NULL; |
jrose@2919 | 3151 | } |
jrose@2919 | 3152 | JVM_END |
jrose@2919 | 3153 | |
jrose@2919 | 3154 | JVM_ENTRY(jobject, MH_invokeExact_UOE(JNIEnv *env, jobject igmh, jobjectArray igargs)) { |
jrose@2919 | 3155 | TempNewSymbol UOE_name = SymbolTable::new_symbol("java/lang/UnsupportedOperationException", CHECK_NULL); |
jrose@2919 | 3156 | THROW_MSG_NULL(UOE_name, "MethodHandle.invokeExact cannot be invoked reflectively"); |
jrose@2919 | 3157 | return NULL; |
jrose@2919 | 3158 | } |
jrose@2919 | 3159 | JVM_END |
jrose@2919 | 3160 | |
jrose@1161 | 3161 | |
jrose@1145 | 3162 | /// JVM_RegisterMethodHandleMethods |
jrose@1145 | 3163 | |
twisti@3131 | 3164 | #undef CS // Solaris builds complain |
twisti@3131 | 3165 | |
jrose@1145 | 3166 | #define LANG "Ljava/lang/" |
jrose@2742 | 3167 | #define JLINV "Ljava/lang/invoke/" |
jrose@1145 | 3168 | |
jrose@1145 | 3169 | #define OBJ LANG"Object;" |
jrose@1145 | 3170 | #define CLS LANG"Class;" |
jrose@1145 | 3171 | #define STRG LANG"String;" |
twisti@3131 | 3172 | #define CS JLINV"CallSite;" |
jrose@2742 | 3173 | #define MT JLINV"MethodType;" |
jrose@2742 | 3174 | #define MH JLINV"MethodHandle;" |
jrose@2742 | 3175 | #define MEM JLINV"MemberName;" |
jrose@2742 | 3176 | #define AMH JLINV"AdapterMethodHandle;" |
jrose@2742 | 3177 | #define BMH JLINV"BoundMethodHandle;" |
jrose@2742 | 3178 | #define DMH JLINV"DirectMethodHandle;" |
jrose@1145 | 3179 | |
jrose@1145 | 3180 | #define CC (char*) /*cast a literal from (const char*)*/ |
jrose@1145 | 3181 | #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) |
jrose@1145 | 3182 | |
twisti@3131 | 3183 | // These are the native methods on java.lang.invoke.MethodHandleNatives. |
jrose@1145 | 3184 | static JNINativeMethod methods[] = { |
jrose@1145 | 3185 | // void init(MemberName self, AccessibleObject ref) |
twisti@3131 | 3186 | {CC"init", CC"("AMH""MH"I)V", FN_PTR(MHN_init_AMH)}, |
twisti@3131 | 3187 | {CC"init", CC"("BMH""OBJ"I)V", FN_PTR(MHN_init_BMH)}, |
twisti@3131 | 3188 | {CC"init", CC"("DMH""OBJ"Z"CLS")V", FN_PTR(MHN_init_DMH)}, |
twisti@3131 | 3189 | {CC"init", CC"("MT")V", FN_PTR(MHN_init_MT)}, |
twisti@3131 | 3190 | {CC"init", CC"("MEM""OBJ")V", FN_PTR(MHN_init_Mem)}, |
twisti@3131 | 3191 | {CC"expand", CC"("MEM")V", FN_PTR(MHN_expand_Mem)}, |
twisti@3131 | 3192 | {CC"resolve", CC"("MEM""CLS")V", FN_PTR(MHN_resolve_Mem)}, |
twisti@3131 | 3193 | {CC"getTarget", CC"("MH"I)"OBJ, FN_PTR(MHN_getTarget)}, |
twisti@3131 | 3194 | {CC"getConstant", CC"(I)I", FN_PTR(MHN_getConstant)}, |
jrose@1145 | 3195 | // static native int getNamedCon(int which, Object[] name) |
twisti@3131 | 3196 | {CC"getNamedCon", CC"(I["OBJ")I", FN_PTR(MHN_getNamedCon)}, |
jrose@1145 | 3197 | // static native int getMembers(Class<?> defc, String matchName, String matchSig, |
jrose@1145 | 3198 | // int matchFlags, Class<?> caller, int skip, MemberName[] results); |
twisti@3131 | 3199 | {CC"getMembers", CC"("CLS""STRG""STRG"I"CLS"I["MEM")I", FN_PTR(MHN_getMembers)} |
twisti@3131 | 3200 | }; |
twisti@3131 | 3201 | |
twisti@3131 | 3202 | static JNINativeMethod call_site_methods[] = { |
twisti@3131 | 3203 | {CC"setCallSiteTargetNormal", CC"("CS""MH")V", FN_PTR(MHN_setCallSiteTargetNormal)}, |
twisti@3131 | 3204 | {CC"setCallSiteTargetVolatile", CC"("CS""MH")V", FN_PTR(MHN_setCallSiteTargetVolatile)} |
jrose@1145 | 3205 | }; |
jrose@1145 | 3206 | |
jrose@2919 | 3207 | static JNINativeMethod invoke_methods[] = { |
jrose@2919 | 3208 | // void init(MemberName self, AccessibleObject ref) |
twisti@3131 | 3209 | {CC"invoke", CC"(["OBJ")"OBJ, FN_PTR(MH_invoke_UOE)}, |
twisti@3131 | 3210 | {CC"invokeExact", CC"(["OBJ")"OBJ, FN_PTR(MH_invokeExact_UOE)} |
jrose@2919 | 3211 | }; |
jrose@2919 | 3212 | |
jrose@1145 | 3213 | // This one function is exported, used by NativeLookup. |
jrose@1145 | 3214 | |
jrose@1145 | 3215 | JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) { |
jrose@1145 | 3216 | assert(MethodHandles::spot_check_entry_names(), "entry enum is OK"); |
jrose@1145 | 3217 | |
twisti@2698 | 3218 | if (!EnableInvokeDynamic) { |
twisti@2698 | 3219 | warning("JSR 292 is disabled in this JVM. Use -XX:+UnlockDiagnosticVMOptions -XX:+EnableInvokeDynamic to enable."); |
jrose@1145 | 3220 | return; // bind nothing |
jrose@1145 | 3221 | } |
jrose@1145 | 3222 | |
twisti@3131 | 3223 | assert(!MethodHandles::enabled(), "must not be enabled"); |
jrose@1474 | 3224 | bool enable_MH = true; |
jrose@1474 | 3225 | |
jrose@2742 | 3226 | { |
jrose@1145 | 3227 | ThreadToNativeFromVM ttnfv(thread); |
jrose@1145 | 3228 | int status = env->RegisterNatives(MHN_class, methods, sizeof(methods)/sizeof(JNINativeMethod)); |
jrose@2919 | 3229 | if (!env->ExceptionOccurred()) { |
jrose@2919 | 3230 | const char* L_MH_name = (JLINV "MethodHandle"); |
jrose@2919 | 3231 | const char* MH_name = L_MH_name+1; |
jrose@2919 | 3232 | jclass MH_class = env->FindClass(MH_name); |
jrose@2919 | 3233 | status = env->RegisterNatives(MH_class, invoke_methods, sizeof(invoke_methods)/sizeof(JNINativeMethod)); |
jrose@2919 | 3234 | } |
jrose@1145 | 3235 | if (env->ExceptionOccurred()) { |
jrose@2742 | 3236 | warning("JSR 292 method handle code is mismatched to this JVM. Disabling support."); |
jrose@2742 | 3237 | enable_MH = false; |
jrose@1145 | 3238 | env->ExceptionClear(); |
jrose@1145 | 3239 | } |
twisti@3131 | 3240 | |
twisti@3131 | 3241 | status = env->RegisterNatives(MHN_class, call_site_methods, sizeof(call_site_methods)/sizeof(JNINativeMethod)); |
twisti@3131 | 3242 | if (env->ExceptionOccurred()) { |
twisti@3131 | 3243 | // Exception is okay until 7087357 |
twisti@3131 | 3244 | env->ExceptionClear(); |
twisti@3131 | 3245 | } |
jrose@1145 | 3246 | } |
jrose@1161 | 3247 | |
jrose@1474 | 3248 | if (enable_MH) { |
jrose@2941 | 3249 | methodOop raiseException_method = MethodHandles::resolve_raise_exception_method(CHECK); |
jrose@2941 | 3250 | if (raiseException_method != NULL) { |
jrose@2941 | 3251 | MethodHandles::set_raise_exception_method(raiseException_method); |
jrose@2742 | 3252 | } else { |
jrose@2941 | 3253 | warning("JSR 292 method handle code is mismatched to this JVM. Disabling support."); |
twisti@2436 | 3254 | enable_MH = false; |
jrose@1474 | 3255 | } |
jrose@1474 | 3256 | } |
jrose@1474 | 3257 | |
jrose@1474 | 3258 | if (enable_MH) { |
twisti@2436 | 3259 | MethodHandles::generate_adapters(); |
jrose@1474 | 3260 | MethodHandles::set_enabled(true); |
jrose@1474 | 3261 | } |
jrose@1145 | 3262 | } |
jrose@1145 | 3263 | JVM_END |