Mercurial > hg > truffle
annotate src/share/vm/prims/methodHandles.cpp @ 1508:2ffde6cfe049
6939196: method handle signatures off the boot class path get linkage errors
Summary: Adjust MethodType lookup logic to search off the BCP, but not to cache those results
Reviewed-by: twisti
| author | jrose |
|---|---|
| date | Sat, 01 May 2010 21:57:35 -0700 |
| parents | cd5dbf694d45 |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 710 | 1 /* |
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2 * Copyright 2008-2010 Sun Microsystems, Inc. All Rights Reserved. |
| 710 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 /* | |
| 26 * JSR 292 reference implementation: method handles | |
| 27 */ | |
| 28 | |
| 29 #include "incls/_precompiled.incl" | |
| 30 #include "incls/_methodHandles.cpp.incl" | |
| 31 | |
| 32 bool MethodHandles::_enabled = false; // set true after successful native linkage | |
| 33 | |
| 34 MethodHandleEntry* MethodHandles::_entries[MethodHandles::_EK_LIMIT] = {NULL}; | |
| 35 const char* MethodHandles::_entry_names[_EK_LIMIT+1] = { | |
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36 "raise_exception", |
| 710 | 37 "invokestatic", // how a MH emulates invokestatic |
| 38 "invokespecial", // ditto for the other invokes... | |
| 39 "invokevirtual", | |
| 40 "invokeinterface", | |
| 41 "bound_ref", // these are for BMH... | |
| 42 "bound_int", | |
| 43 "bound_long", | |
| 44 "bound_ref_direct", // (direct versions have a direct methodOop) | |
| 45 "bound_int_direct", | |
| 46 "bound_long_direct", | |
| 47 | |
| 48 // starting at _adapter_mh_first: | |
| 49 "adapter_retype_only", // these are for AMH... | |
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50 "adapter_retype_raw", |
| 710 | 51 "adapter_check_cast", |
| 52 "adapter_prim_to_prim", | |
| 53 "adapter_ref_to_prim", | |
| 54 "adapter_prim_to_ref", | |
| 55 "adapter_swap_args", | |
| 56 "adapter_rot_args", | |
| 57 "adapter_dup_args", | |
| 58 "adapter_drop_args", | |
| 59 "adapter_collect_args", | |
| 60 "adapter_spread_args", | |
| 61 "adapter_flyby", | |
| 62 "adapter_ricochet", | |
| 63 | |
| 64 // optimized adapter types: | |
| 65 "adapter_swap_args/1", | |
| 66 "adapter_swap_args/2", | |
| 67 "adapter_rot_args/1,up", | |
| 68 "adapter_rot_args/1,down", | |
| 69 "adapter_rot_args/2,up", | |
| 70 "adapter_rot_args/2,down", | |
| 71 "adapter_prim_to_prim/i2i", | |
| 72 "adapter_prim_to_prim/l2i", | |
| 73 "adapter_prim_to_prim/d2f", | |
| 74 "adapter_prim_to_prim/i2l", | |
| 75 "adapter_prim_to_prim/f2d", | |
| 76 "adapter_ref_to_prim/unboxi", | |
| 77 "adapter_ref_to_prim/unboxl", | |
| 78 "adapter_spread_args/0", | |
| 79 "adapter_spread_args/1", | |
| 80 "adapter_spread_args/more", | |
| 81 | |
| 82 NULL | |
| 83 }; | |
| 84 | |
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85 // Adapters. |
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86 MethodHandlesAdapterBlob* MethodHandles::_adapter_code = NULL; |
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87 int MethodHandles::_adapter_code_size = StubRoutines::method_handles_adapters_code_size; |
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88 |
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89 jobject MethodHandles::_raise_exception_method; |
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90 |
| 710 | 91 #ifdef ASSERT |
| 92 bool MethodHandles::spot_check_entry_names() { | |
| 93 assert(!strcmp(entry_name(_invokestatic_mh), "invokestatic"), ""); | |
| 94 assert(!strcmp(entry_name(_bound_ref_mh), "bound_ref"), ""); | |
| 95 assert(!strcmp(entry_name(_adapter_retype_only), "adapter_retype_only"), ""); | |
| 96 assert(!strcmp(entry_name(_adapter_ricochet), "adapter_ricochet"), ""); | |
| 97 assert(!strcmp(entry_name(_adapter_opt_unboxi), "adapter_ref_to_prim/unboxi"), ""); | |
| 98 return true; | |
| 99 } | |
| 100 #endif | |
| 101 | |
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102 |
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103 //------------------------------------------------------------------------------ |
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104 // MethodHandles::generate_adapters |
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105 // |
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106 void MethodHandles::generate_adapters() { |
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107 if (!EnableMethodHandles || SystemDictionary::MethodHandle_klass() == NULL) return; |
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108 |
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109 assert(_adapter_code == NULL, "generate only once"); |
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110 |
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111 ResourceMark rm; |
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112 TraceTime timer("MethodHandles adapters generation", TraceStartupTime); |
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113 _adapter_code = MethodHandlesAdapterBlob::create(_adapter_code_size); |
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114 if (_adapter_code == NULL) |
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115 vm_exit_out_of_memory(_adapter_code_size, "CodeCache: no room for MethodHandles adapters"); |
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116 CodeBuffer code(_adapter_code->instructions_begin(), _adapter_code->instructions_size()); |
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117 |
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118 MethodHandlesAdapterGenerator g(&code); |
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119 g.generate(); |
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120 } |
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121 |
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122 |
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123 //------------------------------------------------------------------------------ |
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124 // MethodHandlesAdapterGenerator::generate |
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125 // |
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126 void MethodHandlesAdapterGenerator::generate() { |
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127 // Generate generic method handle adapters. |
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128 for (MethodHandles::EntryKind ek = MethodHandles::_EK_FIRST; |
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129 ek < MethodHandles::_EK_LIMIT; |
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130 ek = MethodHandles::EntryKind(1 + (int)ek)) { |
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131 StubCodeMark mark(this, "MethodHandle", MethodHandles::entry_name(ek)); |
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132 MethodHandles::generate_method_handle_stub(_masm, ek); |
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133 } |
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134 } |
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135 |
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136 |
| 710 | 137 void MethodHandles::set_enabled(bool z) { |
| 138 if (_enabled != z) { | |
| 139 guarantee(z && EnableMethodHandles, "can only enable once, and only if -XX:+EnableMethodHandles"); | |
| 140 _enabled = z; | |
| 141 } | |
| 142 } | |
| 143 | |
| 144 // Note: A method which does not have a TRAPS argument cannot block in the GC | |
| 145 // or throw exceptions. Such methods are used in this file to do something quick | |
| 146 // and local, like parse a data structure. For speed, such methods work on plain | |
| 147 // oops, not handles. Trapping methods uniformly operate on handles. | |
| 148 | |
| 149 methodOop MethodHandles::decode_vmtarget(oop vmtarget, int vmindex, oop mtype, | |
| 150 klassOop& receiver_limit_result, int& decode_flags_result) { | |
| 151 if (vmtarget == NULL) return NULL; | |
| 152 assert(methodOopDesc::nonvirtual_vtable_index < 0, "encoding"); | |
| 153 if (vmindex < 0) { | |
| 154 // this DMH performs no dispatch; it is directly bound to a methodOop | |
| 155 // A MemberName may either be directly bound to a methodOop, | |
| 156 // or it may use the klass/index form; both forms mean the same thing. | |
| 157 methodOop m = decode_methodOop(methodOop(vmtarget), decode_flags_result); | |
| 158 if ((decode_flags_result & _dmf_has_receiver) != 0 | |
| 159 && java_dyn_MethodType::is_instance(mtype)) { | |
| 160 // Extract receiver type restriction from mtype.ptypes[0]. | |
| 161 objArrayOop ptypes = java_dyn_MethodType::ptypes(mtype); | |
| 162 oop ptype0 = (ptypes == NULL || ptypes->length() < 1) ? oop(NULL) : ptypes->obj_at(0); | |
| 163 if (java_lang_Class::is_instance(ptype0)) | |
| 164 receiver_limit_result = java_lang_Class::as_klassOop(ptype0); | |
| 165 } | |
| 166 if (vmindex == methodOopDesc::nonvirtual_vtable_index) { | |
| 167 // this DMH can be an "invokespecial" version | |
| 168 decode_flags_result &= ~_dmf_does_dispatch; | |
| 169 } else { | |
| 170 assert(vmindex == methodOopDesc::invalid_vtable_index, "random vmindex?"); | |
| 171 } | |
| 172 return m; | |
| 173 } else { | |
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174 assert(vmtarget->is_klass(), "must be class or interface"); |
| 710 | 175 decode_flags_result |= MethodHandles::_dmf_does_dispatch; |
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176 decode_flags_result |= MethodHandles::_dmf_has_receiver; |
| 710 | 177 receiver_limit_result = (klassOop)vmtarget; |
| 178 Klass* tk = Klass::cast((klassOop)vmtarget); | |
| 179 if (tk->is_interface()) { | |
| 180 // an itable linkage is <interface, itable index> | |
| 181 decode_flags_result |= MethodHandles::_dmf_from_interface; | |
| 182 return klassItable::method_for_itable_index((klassOop)vmtarget, vmindex); | |
| 183 } else { | |
| 184 if (!tk->oop_is_instance()) | |
| 1142 | 185 tk = instanceKlass::cast(SystemDictionary::Object_klass()); |
| 710 | 186 return ((instanceKlass*)tk)->method_at_vtable(vmindex); |
| 187 } | |
| 188 } | |
| 189 } | |
| 190 | |
| 191 // MemberName and DirectMethodHandle have the same linkage to the JVM internals. | |
| 192 // (MemberName is the non-operational name used for queries and setup.) | |
| 193 | |
| 194 methodOop MethodHandles::decode_DirectMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result) { | |
| 195 oop vmtarget = sun_dyn_DirectMethodHandle::vmtarget(mh); | |
| 196 int vmindex = sun_dyn_DirectMethodHandle::vmindex(mh); | |
| 197 oop mtype = sun_dyn_DirectMethodHandle::type(mh); | |
| 198 return decode_vmtarget(vmtarget, vmindex, mtype, receiver_limit_result, decode_flags_result); | |
| 199 } | |
| 200 | |
| 201 methodOop MethodHandles::decode_BoundMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result) { | |
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202 assert(sun_dyn_BoundMethodHandle::is_instance(mh), ""); |
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203 assert(mh->klass() != SystemDictionary::AdapterMethodHandle_klass(), ""); |
| 710 | 204 for (oop bmh = mh;;) { |
| 205 // Bound MHs can be stacked to bind several arguments. | |
| 206 oop target = java_dyn_MethodHandle::vmtarget(bmh); | |
| 207 if (target == NULL) return NULL; | |
| 208 decode_flags_result |= MethodHandles::_dmf_binds_argument; | |
| 209 klassOop tk = target->klass(); | |
| 210 if (tk == SystemDictionary::BoundMethodHandle_klass()) { | |
| 211 bmh = target; | |
| 212 continue; | |
| 213 } else { | |
| 214 if (java_dyn_MethodHandle::is_subclass(tk)) { | |
| 215 //assert(tk == SystemDictionary::DirectMethodHandle_klass(), "end of BMH chain must be DMH"); | |
| 216 return decode_MethodHandle(target, receiver_limit_result, decode_flags_result); | |
| 217 } else { | |
| 218 // Optimized case: binding a receiver to a non-dispatched DMH | |
| 219 // short-circuits directly to the methodOop. | |
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220 // (It might be another argument besides a receiver also.) |
| 710 | 221 assert(target->is_method(), "must be a simple method"); |
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222 decode_flags_result |= MethodHandles::_dmf_binds_method; |
| 710 | 223 methodOop m = (methodOop) target; |
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224 if (!m->is_static()) |
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225 decode_flags_result |= MethodHandles::_dmf_has_receiver; |
| 710 | 226 return m; |
| 227 } | |
| 228 } | |
| 229 } | |
| 230 } | |
| 231 | |
| 232 methodOop MethodHandles::decode_AdapterMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result) { | |
| 233 assert(mh->klass() == SystemDictionary::AdapterMethodHandle_klass(), ""); | |
| 234 for (oop amh = mh;;) { | |
| 235 // Adapter MHs can be stacked to convert several arguments. | |
| 236 int conv_op = adapter_conversion_op(sun_dyn_AdapterMethodHandle::conversion(amh)); | |
| 237 decode_flags_result |= (_dmf_adapter_lsb << conv_op) & _DMF_ADAPTER_MASK; | |
| 238 oop target = java_dyn_MethodHandle::vmtarget(amh); | |
| 239 if (target == NULL) return NULL; | |
| 240 klassOop tk = target->klass(); | |
| 241 if (tk == SystemDictionary::AdapterMethodHandle_klass()) { | |
| 242 amh = target; | |
| 243 continue; | |
| 244 } else { | |
| 245 // must be a BMH (which will bind some more arguments) or a DMH (for the final call) | |
| 246 return MethodHandles::decode_MethodHandle(target, receiver_limit_result, decode_flags_result); | |
| 247 } | |
| 248 } | |
| 249 } | |
| 250 | |
| 251 methodOop MethodHandles::decode_MethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result) { | |
| 252 if (mh == NULL) return NULL; | |
| 253 klassOop mhk = mh->klass(); | |
| 254 assert(java_dyn_MethodHandle::is_subclass(mhk), "must be a MethodHandle"); | |
| 255 if (mhk == SystemDictionary::DirectMethodHandle_klass()) { | |
| 256 return decode_DirectMethodHandle(mh, receiver_limit_result, decode_flags_result); | |
| 257 } else if (mhk == SystemDictionary::BoundMethodHandle_klass()) { | |
| 258 return decode_BoundMethodHandle(mh, receiver_limit_result, decode_flags_result); | |
| 259 } else if (mhk == SystemDictionary::AdapterMethodHandle_klass()) { | |
| 260 return decode_AdapterMethodHandle(mh, receiver_limit_result, decode_flags_result); | |
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261 } else if (sun_dyn_BoundMethodHandle::is_subclass(mhk)) { |
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262 // could be a JavaMethodHandle (but not an adapter MH) |
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263 return decode_BoundMethodHandle(mh, receiver_limit_result, decode_flags_result); |
| 710 | 264 } else { |
| 265 assert(false, "cannot parse this MH"); | |
| 266 return NULL; // random MH? | |
| 267 } | |
| 268 } | |
| 269 | |
| 270 methodOop MethodHandles::decode_methodOop(methodOop m, int& decode_flags_result) { | |
| 271 assert(m->is_method(), ""); | |
| 272 if (m->is_static()) { | |
| 273 // check that signature begins '(L' or '([' (not '(I', '()', etc.) | |
| 274 symbolOop sig = m->signature(); | |
| 275 BasicType recv_bt = char2type(sig->byte_at(1)); | |
| 276 // Note: recv_bt might be T_ILLEGAL if byte_at(2) is ')' | |
| 277 assert(sig->byte_at(0) == '(', "must be method sig"); | |
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278 // if (recv_bt == T_OBJECT || recv_bt == T_ARRAY) |
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279 // decode_flags_result |= _dmf_has_receiver; |
| 710 | 280 } else { |
| 281 // non-static method | |
| 282 decode_flags_result |= _dmf_has_receiver; | |
| 283 if (!m->can_be_statically_bound() && !m->is_initializer()) { | |
| 284 decode_flags_result |= _dmf_does_dispatch; | |
| 285 if (Klass::cast(m->method_holder())->is_interface()) | |
| 286 decode_flags_result |= _dmf_from_interface; | |
| 287 } | |
| 288 } | |
| 289 return m; | |
| 290 } | |
| 291 | |
| 292 | |
| 293 // A trusted party is handing us a cookie to determine a method. | |
| 294 // Let's boil it down to the method oop they really want. | |
| 295 methodOop MethodHandles::decode_method(oop x, klassOop& receiver_limit_result, int& decode_flags_result) { | |
| 296 decode_flags_result = 0; | |
| 297 receiver_limit_result = NULL; | |
| 298 klassOop xk = x->klass(); | |
| 299 if (xk == Universe::methodKlassObj()) { | |
| 300 return decode_methodOop((methodOop) x, decode_flags_result); | |
| 301 } else if (xk == SystemDictionary::MemberName_klass()) { | |
| 302 // Note: This only works if the MemberName has already been resolved. | |
| 303 return decode_MemberName(x, receiver_limit_result, decode_flags_result); | |
| 304 } else if (java_dyn_MethodHandle::is_subclass(xk)) { | |
| 305 return decode_MethodHandle(x, receiver_limit_result, decode_flags_result); | |
| 1142 | 306 } else if (xk == SystemDictionary::reflect_Method_klass()) { |
| 710 | 307 oop clazz = java_lang_reflect_Method::clazz(x); |
| 308 int slot = java_lang_reflect_Method::slot(x); | |
| 309 klassOop k = java_lang_Class::as_klassOop(clazz); | |
| 310 if (k != NULL && Klass::cast(k)->oop_is_instance()) | |
| 311 return decode_methodOop(instanceKlass::cast(k)->method_with_idnum(slot), | |
| 312 decode_flags_result); | |
| 1142 | 313 } else if (xk == SystemDictionary::reflect_Constructor_klass()) { |
| 710 | 314 oop clazz = java_lang_reflect_Constructor::clazz(x); |
| 315 int slot = java_lang_reflect_Constructor::slot(x); | |
| 316 klassOop k = java_lang_Class::as_klassOop(clazz); | |
| 317 if (k != NULL && Klass::cast(k)->oop_is_instance()) | |
| 318 return decode_methodOop(instanceKlass::cast(k)->method_with_idnum(slot), | |
| 319 decode_flags_result); | |
| 320 } else { | |
| 321 // unrecognized object | |
| 322 assert(!x->is_method(), "already checked"); | |
| 323 assert(!sun_dyn_MemberName::is_instance(x), "already checked"); | |
| 324 } | |
| 325 return NULL; | |
| 326 } | |
| 327 | |
| 328 | |
| 329 int MethodHandles::decode_MethodHandle_stack_pushes(oop mh) { | |
| 330 if (mh->klass() == SystemDictionary::DirectMethodHandle_klass()) | |
| 331 return 0; // no push/pop | |
| 332 int this_vmslots = java_dyn_MethodHandle::vmslots(mh); | |
| 333 int last_vmslots = 0; | |
| 334 oop last_mh = mh; | |
| 335 for (;;) { | |
| 336 oop target = java_dyn_MethodHandle::vmtarget(last_mh); | |
| 337 if (target->klass() == SystemDictionary::DirectMethodHandle_klass()) { | |
| 338 last_vmslots = java_dyn_MethodHandle::vmslots(target); | |
| 339 break; | |
| 340 } else if (!java_dyn_MethodHandle::is_instance(target)) { | |
| 341 // might be klass or method | |
| 342 assert(target->is_method(), "must get here with a direct ref to method"); | |
| 343 last_vmslots = methodOop(target)->size_of_parameters(); | |
| 344 break; | |
| 345 } | |
| 346 last_mh = target; | |
| 347 } | |
| 348 // If I am called with fewer VM slots than my ultimate callee, | |
| 349 // it must be that I push the additionally needed slots. | |
| 350 // Likewise if am called with more VM slots, I will pop them. | |
| 351 return (last_vmslots - this_vmslots); | |
| 352 } | |
| 353 | |
| 354 | |
| 355 // MemberName support | |
| 356 | |
| 357 // import sun_dyn_MemberName.* | |
| 358 enum { | |
| 359 IS_METHOD = sun_dyn_MemberName::MN_IS_METHOD, | |
| 360 IS_CONSTRUCTOR = sun_dyn_MemberName::MN_IS_CONSTRUCTOR, | |
| 361 IS_FIELD = sun_dyn_MemberName::MN_IS_FIELD, | |
| 362 IS_TYPE = sun_dyn_MemberName::MN_IS_TYPE, | |
| 363 SEARCH_SUPERCLASSES = sun_dyn_MemberName::MN_SEARCH_SUPERCLASSES, | |
| 364 SEARCH_INTERFACES = sun_dyn_MemberName::MN_SEARCH_INTERFACES, | |
| 365 ALL_KINDS = IS_METHOD | IS_CONSTRUCTOR | IS_FIELD | IS_TYPE, | |
| 366 VM_INDEX_UNINITIALIZED = sun_dyn_MemberName::VM_INDEX_UNINITIALIZED | |
| 367 }; | |
| 368 | |
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369 Handle MethodHandles::new_MemberName(TRAPS) { |
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370 Handle empty; |
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371 instanceKlassHandle k(THREAD, SystemDictionary::MemberName_klass()); |
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372 if (!k->is_initialized()) k->initialize(CHECK_(empty)); |
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373 return Handle(THREAD, k->allocate_instance(THREAD)); |
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374 } |
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375 |
| 710 | 376 void MethodHandles::init_MemberName(oop mname_oop, oop target_oop) { |
| 1142 | 377 if (target_oop->klass() == SystemDictionary::reflect_Field_klass()) { |
| 710 | 378 oop clazz = java_lang_reflect_Field::clazz(target_oop); // fd.field_holder() |
| 379 int slot = java_lang_reflect_Field::slot(target_oop); // fd.index() | |
| 380 int mods = java_lang_reflect_Field::modifiers(target_oop); | |
| 381 klassOop k = java_lang_Class::as_klassOop(clazz); | |
| 382 int offset = instanceKlass::cast(k)->offset_from_fields(slot); | |
| 383 init_MemberName(mname_oop, k, accessFlags_from(mods), offset); | |
| 384 } else { | |
| 385 int decode_flags = 0; klassOop receiver_limit = NULL; | |
| 386 methodOop m = MethodHandles::decode_method(target_oop, | |
| 387 receiver_limit, decode_flags); | |
| 388 bool do_dispatch = ((decode_flags & MethodHandles::_dmf_does_dispatch) != 0); | |
| 389 init_MemberName(mname_oop, m, do_dispatch); | |
| 390 } | |
| 391 } | |
| 392 | |
| 393 void MethodHandles::init_MemberName(oop mname_oop, methodOop m, bool do_dispatch) { | |
| 394 int flags = ((m->is_initializer() ? IS_CONSTRUCTOR : IS_METHOD) | |
| 395 | (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS )); | |
| 396 oop vmtarget = m; | |
| 397 int vmindex = methodOopDesc::invalid_vtable_index; // implies no info yet | |
| 398 if (!do_dispatch || (flags & IS_CONSTRUCTOR) || m->can_be_statically_bound()) | |
| 399 vmindex = methodOopDesc::nonvirtual_vtable_index; // implies never any dispatch | |
| 400 assert(vmindex != VM_INDEX_UNINITIALIZED, "Java sentinel value"); | |
| 401 sun_dyn_MemberName::set_vmtarget(mname_oop, vmtarget); | |
| 402 sun_dyn_MemberName::set_vmindex(mname_oop, vmindex); | |
| 403 sun_dyn_MemberName::set_flags(mname_oop, flags); | |
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404 sun_dyn_MemberName::set_clazz(mname_oop, Klass::cast(m->method_holder())->java_mirror()); |
| 710 | 405 } |
| 406 | |
| 407 void MethodHandles::init_MemberName(oop mname_oop, klassOop field_holder, AccessFlags mods, int offset) { | |
| 408 int flags = (IS_FIELD | (jushort)( mods.as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS )); | |
| 409 oop vmtarget = field_holder; | |
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410 int vmindex = offset; // determines the field uniquely when combined with static bit |
| 710 | 411 assert(vmindex != VM_INDEX_UNINITIALIZED, "bad alias on vmindex"); |
| 412 sun_dyn_MemberName::set_vmtarget(mname_oop, vmtarget); | |
| 413 sun_dyn_MemberName::set_vmindex(mname_oop, vmindex); | |
| 414 sun_dyn_MemberName::set_flags(mname_oop, flags); | |
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415 sun_dyn_MemberName::set_clazz(mname_oop, Klass::cast(field_holder)->java_mirror()); |
| 710 | 416 } |
| 417 | |
| 418 | |
| 419 methodOop MethodHandles::decode_MemberName(oop mname, klassOop& receiver_limit_result, int& decode_flags_result) { | |
| 420 int flags = sun_dyn_MemberName::flags(mname); | |
| 421 if ((flags & (IS_METHOD | IS_CONSTRUCTOR)) == 0) return NULL; // not invocable | |
| 422 oop vmtarget = sun_dyn_MemberName::vmtarget(mname); | |
| 423 int vmindex = sun_dyn_MemberName::vmindex(mname); | |
| 424 if (vmindex == VM_INDEX_UNINITIALIZED) return NULL; // not resolved | |
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425 methodOop m = decode_vmtarget(vmtarget, vmindex, NULL, receiver_limit_result, decode_flags_result); |
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426 oop clazz = sun_dyn_MemberName::clazz(mname); |
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427 if (clazz != NULL && java_lang_Class::is_instance(clazz)) { |
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428 klassOop klass = java_lang_Class::as_klassOop(clazz); |
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429 if (klass != NULL) receiver_limit_result = klass; |
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430 } |
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431 return m; |
| 710 | 432 } |
| 433 | |
| 434 // An unresolved member name is a mere symbolic reference. | |
| 435 // Resolving it plants a vmtarget/vmindex in it, | |
| 436 // which refers dirctly to JVM internals. | |
| 437 void MethodHandles::resolve_MemberName(Handle mname, TRAPS) { | |
| 438 assert(sun_dyn_MemberName::is_instance(mname()), ""); | |
| 439 #ifdef ASSERT | |
| 440 // If this assert throws, renegotiate the sentinel value used by the Java code, | |
| 441 // so that it is distinct from any valid vtable index value, and any special | |
| 442 // values defined in methodOopDesc::VtableIndexFlag. | |
| 443 // The point of the slop is to give the Java code and the JVM some room | |
| 444 // to independently specify sentinel values. | |
| 445 const int sentinel_slop = 10; | |
| 446 const int sentinel_limit = methodOopDesc::highest_unused_vtable_index_value - sentinel_slop; | |
| 447 assert(VM_INDEX_UNINITIALIZED < sentinel_limit, "Java sentinel != JVM sentinels"); | |
| 448 #endif | |
| 449 if (sun_dyn_MemberName::vmindex(mname()) != VM_INDEX_UNINITIALIZED) | |
| 450 return; // already resolved | |
| 451 oop defc_oop = sun_dyn_MemberName::clazz(mname()); | |
| 452 oop name_str = sun_dyn_MemberName::name(mname()); | |
| 453 oop type_str = sun_dyn_MemberName::type(mname()); | |
| 454 int flags = sun_dyn_MemberName::flags(mname()); | |
| 455 | |
| 456 if (defc_oop == NULL || name_str == NULL || type_str == NULL) { | |
| 457 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to resolve"); | |
| 458 } | |
| 459 klassOop defc_klassOop = java_lang_Class::as_klassOop(defc_oop); | |
| 460 defc_oop = NULL; // safety | |
| 461 if (defc_klassOop == NULL) return; // a primitive; no resolution possible | |
| 462 if (!Klass::cast(defc_klassOop)->oop_is_instance()) { | |
| 463 if (!Klass::cast(defc_klassOop)->oop_is_array()) return; | |
| 1142 | 464 defc_klassOop = SystemDictionary::Object_klass(); |
| 710 | 465 } |
| 466 instanceKlassHandle defc(THREAD, defc_klassOop); | |
| 467 defc_klassOop = NULL; // safety | |
| 468 if (defc.is_null()) { | |
| 469 THROW_MSG(vmSymbols::java_lang_InternalError(), "primitive class"); | |
| 470 } | |
| 471 defc->link_class(CHECK); | |
| 472 | |
| 473 // convert the external string name to an internal symbol | |
| 474 symbolHandle name(THREAD, java_lang_String::as_symbol_or_null(name_str)); | |
| 475 if (name.is_null()) return; // no such name | |
| 476 name_str = NULL; // safety | |
| 477 | |
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478 Handle polymorphic_method_type; |
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479 bool polymorphic_signature = false; |
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480 if ((flags & ALL_KINDS) == IS_METHOD && |
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481 (defc() == SystemDictionary::InvokeDynamic_klass() || |
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482 (defc() == SystemDictionary::MethodHandle_klass() && |
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483 methodOopDesc::is_method_handle_invoke_name(name())))) |
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484 polymorphic_signature = true; |
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485 |
| 710 | 486 // convert the external string or reflective type to an internal signature |
| 487 symbolHandle type; { | |
| 488 symbolOop type_sym = NULL; | |
| 489 if (java_dyn_MethodType::is_instance(type_str)) { | |
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490 type_sym = java_dyn_MethodType::as_signature(type_str, polymorphic_signature, CHECK); |
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491 if (polymorphic_signature) |
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492 polymorphic_method_type = Handle(THREAD, type_str); //preserve exactly |
| 710 | 493 } else if (java_lang_Class::is_instance(type_str)) { |
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494 type_sym = java_lang_Class::as_signature(type_str, false, CHECK); |
| 710 | 495 } else if (java_lang_String::is_instance(type_str)) { |
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496 if (polymorphic_signature) { |
| 710 | 497 type = java_lang_String::as_symbol(type_str, CHECK); |
| 498 } else { | |
| 499 type_sym = java_lang_String::as_symbol_or_null(type_str); | |
| 500 } | |
| 501 } else { | |
| 502 THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized type"); | |
| 503 } | |
| 504 if (type_sym != NULL) | |
| 505 type = symbolHandle(THREAD, type_sym); | |
| 506 } | |
| 507 if (type.is_null()) return; // no such signature exists in the VM | |
| 508 type_str = NULL; // safety | |
| 509 | |
| 510 // Time to do the lookup. | |
| 511 switch (flags & ALL_KINDS) { | |
| 512 case IS_METHOD: | |
| 513 { | |
| 514 CallInfo result; | |
| 515 { | |
| 516 EXCEPTION_MARK; | |
| 517 if ((flags & JVM_ACC_STATIC) != 0) { | |
| 518 LinkResolver::resolve_static_call(result, | |
| 519 defc, name, type, KlassHandle(), false, false, THREAD); | |
| 520 } else if (defc->is_interface()) { | |
| 521 LinkResolver::resolve_interface_call(result, Handle(), defc, | |
| 522 defc, name, type, KlassHandle(), false, false, THREAD); | |
| 523 } else { | |
| 524 LinkResolver::resolve_virtual_call(result, Handle(), defc, | |
| 525 defc, name, type, KlassHandle(), false, false, THREAD); | |
| 526 } | |
| 527 if (HAS_PENDING_EXCEPTION) { | |
| 528 CLEAR_PENDING_EXCEPTION; | |
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529 break; // go to second chance |
| 710 | 530 } |
| 531 } | |
| 532 methodHandle m = result.resolved_method(); | |
| 533 oop vmtarget = NULL; | |
| 534 int vmindex = methodOopDesc::nonvirtual_vtable_index; | |
| 535 if (defc->is_interface()) { | |
| 536 vmindex = klassItable::compute_itable_index(m()); | |
| 537 assert(vmindex >= 0, ""); | |
| 538 } else if (result.has_vtable_index()) { | |
| 539 vmindex = result.vtable_index(); | |
| 540 assert(vmindex >= 0, ""); | |
| 541 } | |
| 542 assert(vmindex != VM_INDEX_UNINITIALIZED, ""); | |
| 543 if (vmindex < 0) { | |
| 544 assert(result.is_statically_bound(), ""); | |
| 545 vmtarget = m(); | |
| 546 } else { | |
| 547 vmtarget = result.resolved_klass()->as_klassOop(); | |
| 548 } | |
| 549 int mods = (m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
| 550 sun_dyn_MemberName::set_vmtarget(mname(), vmtarget); | |
| 551 sun_dyn_MemberName::set_vmindex(mname(), vmindex); | |
| 552 sun_dyn_MemberName::set_modifiers(mname(), mods); | |
| 553 DEBUG_ONLY(int junk; klassOop junk2); | |
| 554 assert(decode_MemberName(mname(), junk2, junk) == result.resolved_method()(), | |
| 555 "properly stored for later decoding"); | |
| 556 return; | |
| 557 } | |
| 558 case IS_CONSTRUCTOR: | |
| 559 { | |
| 560 CallInfo result; | |
| 561 { | |
| 562 EXCEPTION_MARK; | |
| 563 if (name() == vmSymbols::object_initializer_name()) { | |
| 564 LinkResolver::resolve_special_call(result, | |
| 565 defc, name, type, KlassHandle(), false, THREAD); | |
| 566 } else { | |
| 567 break; // will throw after end of switch | |
| 568 } | |
| 569 if (HAS_PENDING_EXCEPTION) { | |
| 570 CLEAR_PENDING_EXCEPTION; | |
| 571 return; | |
| 572 } | |
| 573 } | |
| 574 assert(result.is_statically_bound(), ""); | |
| 575 methodHandle m = result.resolved_method(); | |
| 576 oop vmtarget = m(); | |
| 577 int vmindex = methodOopDesc::nonvirtual_vtable_index; | |
| 578 int mods = (m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
| 579 sun_dyn_MemberName::set_vmtarget(mname(), vmtarget); | |
| 580 sun_dyn_MemberName::set_vmindex(mname(), vmindex); | |
| 581 sun_dyn_MemberName::set_modifiers(mname(), mods); | |
| 582 DEBUG_ONLY(int junk; klassOop junk2); | |
| 583 assert(decode_MemberName(mname(), junk2, junk) == result.resolved_method()(), | |
| 584 "properly stored for later decoding"); | |
| 585 return; | |
| 586 } | |
| 587 case IS_FIELD: | |
| 588 { | |
| 589 // This is taken from LinkResolver::resolve_field, sans access checks. | |
| 590 fieldDescriptor fd; // find_field initializes fd if found | |
| 591 KlassHandle sel_klass(THREAD, instanceKlass::cast(defc())->find_field(name(), type(), &fd)); | |
| 592 // check if field exists; i.e., if a klass containing the field def has been selected | |
| 593 if (sel_klass.is_null()) return; | |
| 594 oop vmtarget = sel_klass->as_klassOop(); | |
| 595 int vmindex = fd.offset(); | |
| 596 int mods = (fd.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS); | |
| 597 if (vmindex == VM_INDEX_UNINITIALIZED) break; // should not happen | |
| 598 sun_dyn_MemberName::set_vmtarget(mname(), vmtarget); | |
| 599 sun_dyn_MemberName::set_vmindex(mname(), vmindex); | |
| 600 sun_dyn_MemberName::set_modifiers(mname(), mods); | |
| 601 return; | |
| 602 } | |
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603 default: |
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604 THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format"); |
| 710 | 605 } |
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606 |
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607 // Second chance. |
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608 if (polymorphic_method_type.not_null()) { |
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609 // Look on a non-null class loader. |
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610 Handle cur_class_loader; |
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611 const int nptypes = java_dyn_MethodType::ptype_count(polymorphic_method_type()); |
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612 for (int i = 0; i <= nptypes; i++) { |
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613 oop type_mirror; |
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614 if (i < nptypes) type_mirror = java_dyn_MethodType::ptype(polymorphic_method_type(), i); |
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615 else type_mirror = java_dyn_MethodType::rtype(polymorphic_method_type()); |
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616 klassOop example_type = java_lang_Class::as_klassOop(type_mirror); |
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617 if (example_type == NULL) continue; |
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618 oop class_loader = Klass::cast(example_type)->class_loader(); |
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619 if (class_loader == NULL || class_loader == cur_class_loader()) continue; |
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620 cur_class_loader = Handle(THREAD, class_loader); |
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621 methodOop m = SystemDictionary::find_method_handle_invoke(name, |
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622 type, |
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623 KlassHandle(THREAD, example_type), |
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624 THREAD); |
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625 if (HAS_PENDING_EXCEPTION) { |
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626 CLEAR_PENDING_EXCEPTION; |
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627 m = NULL; |
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628 // try again with a different class loader... |
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629 } |
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630 if (m != NULL) { |
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631 int mods = (m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS); |
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632 sun_dyn_MemberName::set_vmtarget(mname(), m); |
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633 sun_dyn_MemberName::set_vmindex(mname(), m->vtable_index()); |
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634 sun_dyn_MemberName::set_modifiers(mname(), mods); |
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635 return; |
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636 } |
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637 } |
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638 } |
| 710 | 639 } |
| 640 | |
| 641 // Conversely, a member name which is only initialized from JVM internals | |
| 642 // may have null defc, name, and type fields. | |
| 643 // Resolving it plants a vmtarget/vmindex in it, | |
| 644 // which refers directly to JVM internals. | |
| 645 void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) { | |
| 646 assert(sun_dyn_MemberName::is_instance(mname()), ""); | |
| 647 oop vmtarget = sun_dyn_MemberName::vmtarget(mname()); | |
| 648 int vmindex = sun_dyn_MemberName::vmindex(mname()); | |
| 649 if (vmtarget == NULL || vmindex == VM_INDEX_UNINITIALIZED) { | |
| 650 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand"); | |
| 651 } | |
| 652 | |
| 653 bool have_defc = (sun_dyn_MemberName::clazz(mname()) != NULL); | |
| 654 bool have_name = (sun_dyn_MemberName::name(mname()) != NULL); | |
| 655 bool have_type = (sun_dyn_MemberName::type(mname()) != NULL); | |
| 656 int flags = sun_dyn_MemberName::flags(mname()); | |
| 657 | |
| 658 if (suppress != 0) { | |
| 659 if (suppress & _suppress_defc) have_defc = true; | |
| 660 if (suppress & _suppress_name) have_name = true; | |
| 661 if (suppress & _suppress_type) have_type = true; | |
| 662 } | |
| 663 | |
| 664 if (have_defc && have_name && have_type) return; // nothing needed | |
| 665 | |
| 666 switch (flags & ALL_KINDS) { | |
| 667 case IS_METHOD: | |
| 668 case IS_CONSTRUCTOR: | |
| 669 { | |
| 670 klassOop receiver_limit = NULL; | |
| 671 int decode_flags = 0; | |
| 672 methodHandle m(THREAD, decode_vmtarget(vmtarget, vmindex, NULL, | |
| 673 receiver_limit, decode_flags)); | |
| 674 if (m.is_null()) break; | |
| 675 if (!have_defc) { | |
| 676 klassOop defc = m->method_holder(); | |
| 677 if (receiver_limit != NULL && receiver_limit != defc | |
| 678 && Klass::cast(receiver_limit)->is_subtype_of(defc)) | |
| 679 defc = receiver_limit; | |
| 680 sun_dyn_MemberName::set_clazz(mname(), Klass::cast(defc)->java_mirror()); | |
| 681 } | |
| 682 if (!have_name) { | |
| 683 //not java_lang_String::create_from_symbol; let's intern member names | |
| 684 Handle name = StringTable::intern(m->name(), CHECK); | |
| 685 sun_dyn_MemberName::set_name(mname(), name()); | |
| 686 } | |
| 687 if (!have_type) { | |
| 688 Handle type = java_lang_String::create_from_symbol(m->signature(), CHECK); | |
| 689 sun_dyn_MemberName::set_type(mname(), type()); | |
| 690 } | |
| 691 return; | |
| 692 } | |
| 693 case IS_FIELD: | |
| 694 { | |
| 695 // This is taken from LinkResolver::resolve_field, sans access checks. | |
| 696 if (!vmtarget->is_klass()) break; | |
| 697 if (!Klass::cast((klassOop) vmtarget)->oop_is_instance()) break; | |
| 698 instanceKlassHandle defc(THREAD, (klassOop) vmtarget); | |
| 699 bool is_static = ((flags & JVM_ACC_STATIC) != 0); | |
| 700 fieldDescriptor fd; // find_field initializes fd if found | |
| 701 if (!defc->find_field_from_offset(vmindex, is_static, &fd)) | |
| 702 break; // cannot expand | |
| 703 if (!have_defc) { | |
| 704 sun_dyn_MemberName::set_clazz(mname(), defc->java_mirror()); | |
| 705 } | |
| 706 if (!have_name) { | |
| 707 //not java_lang_String::create_from_symbol; let's intern member names | |
| 708 Handle name = StringTable::intern(fd.name(), CHECK); | |
| 709 sun_dyn_MemberName::set_name(mname(), name()); | |
| 710 } | |
| 711 if (!have_type) { | |
| 712 Handle type = java_lang_String::create_from_symbol(fd.signature(), CHECK); | |
| 713 sun_dyn_MemberName::set_type(mname(), type()); | |
| 714 } | |
| 715 return; | |
| 716 } | |
| 717 } | |
| 718 THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format"); | |
| 719 } | |
| 720 | |
| 721 int MethodHandles::find_MemberNames(klassOop k, | |
| 722 symbolOop name, symbolOop sig, | |
| 723 int mflags, klassOop caller, | |
| 724 int skip, objArrayOop results) { | |
| 725 DEBUG_ONLY(No_Safepoint_Verifier nsv); | |
| 726 // this code contains no safepoints! | |
| 727 | |
| 728 // %%% take caller into account! | |
| 729 | |
| 730 if (k == NULL || !Klass::cast(k)->oop_is_instance()) return -1; | |
| 731 | |
| 732 int rfill = 0, rlimit = results->length(), rskip = skip; | |
| 733 // overflow measurement: | |
| 734 int overflow = 0, overflow_limit = MAX2(1000, rlimit); | |
| 735 | |
| 736 int match_flags = mflags; | |
| 737 bool search_superc = ((match_flags & SEARCH_SUPERCLASSES) != 0); | |
| 738 bool search_intfc = ((match_flags & SEARCH_INTERFACES) != 0); | |
| 739 bool local_only = !(search_superc | search_intfc); | |
| 740 bool classes_only = false; | |
| 741 | |
| 742 if (name != NULL) { | |
| 743 if (name->utf8_length() == 0) return 0; // a match is not possible | |
| 744 } | |
| 745 if (sig != NULL) { | |
| 746 if (sig->utf8_length() == 0) return 0; // a match is not possible | |
| 747 if (sig->byte_at(0) == '(') | |
| 748 match_flags &= ~(IS_FIELD | IS_TYPE); | |
| 749 else | |
| 750 match_flags &= ~(IS_CONSTRUCTOR | IS_METHOD); | |
| 751 } | |
| 752 | |
| 753 if ((match_flags & IS_TYPE) != 0) { | |
| 754 // NYI, and Core Reflection works quite well for this query | |
| 755 } | |
| 756 | |
| 757 if ((match_flags & IS_FIELD) != 0) { | |
| 758 for (FieldStream st(k, local_only, !search_intfc); !st.eos(); st.next()) { | |
| 759 if (name != NULL && st.name() != name) | |
| 760 continue; | |
| 761 if (sig != NULL && st.signature() != sig) | |
| 762 continue; | |
| 763 // passed the filters | |
| 764 if (rskip > 0) { | |
| 765 --rskip; | |
| 766 } else if (rfill < rlimit) { | |
| 767 oop result = results->obj_at(rfill++); | |
| 768 if (!sun_dyn_MemberName::is_instance(result)) | |
| 769 return -99; // caller bug! | |
| 770 MethodHandles::init_MemberName(result, st.klass()->as_klassOop(), st.access_flags(), st.offset()); | |
| 771 } else if (++overflow >= overflow_limit) { | |
| 772 match_flags = 0; break; // got tired of looking at overflow | |
| 773 } | |
| 774 } | |
| 775 } | |
| 776 | |
| 777 if ((match_flags & (IS_METHOD | IS_CONSTRUCTOR)) != 0) { | |
| 778 // watch out for these guys: | |
| 779 symbolOop init_name = vmSymbols::object_initializer_name(); | |
| 780 symbolOop clinit_name = vmSymbols::class_initializer_name(); | |
| 781 if (name == clinit_name) clinit_name = NULL; // hack for exposing <clinit> | |
| 782 bool negate_name_test = false; | |
| 783 // fix name so that it captures the intention of IS_CONSTRUCTOR | |
| 784 if (!(match_flags & IS_METHOD)) { | |
| 785 // constructors only | |
| 786 if (name == NULL) { | |
| 787 name = init_name; | |
| 788 } else if (name != init_name) { | |
| 789 return 0; // no constructors of this method name | |
| 790 } | |
| 791 } else if (!(match_flags & IS_CONSTRUCTOR)) { | |
| 792 // methods only | |
| 793 if (name == NULL) { | |
| 794 name = init_name; | |
| 795 negate_name_test = true; // if we see the name, we *omit* the entry | |
| 796 } else if (name == init_name) { | |
| 797 return 0; // no methods of this constructor name | |
| 798 } | |
| 799 } else { | |
| 800 // caller will accept either sort; no need to adjust name | |
| 801 } | |
| 802 for (MethodStream st(k, local_only, !search_intfc); !st.eos(); st.next()) { | |
| 803 methodOop m = st.method(); | |
| 804 symbolOop m_name = m->name(); | |
| 805 if (m_name == clinit_name) | |
| 806 continue; | |
| 807 if (name != NULL && ((m_name != name) ^ negate_name_test)) | |
| 808 continue; | |
| 809 if (sig != NULL && m->signature() != sig) | |
| 810 continue; | |
| 811 // passed the filters | |
| 812 if (rskip > 0) { | |
| 813 --rskip; | |
| 814 } else if (rfill < rlimit) { | |
| 815 oop result = results->obj_at(rfill++); | |
| 816 if (!sun_dyn_MemberName::is_instance(result)) | |
| 817 return -99; // caller bug! | |
| 818 MethodHandles::init_MemberName(result, m, true); | |
| 819 } else if (++overflow >= overflow_limit) { | |
| 820 match_flags = 0; break; // got tired of looking at overflow | |
| 821 } | |
| 822 } | |
| 823 } | |
| 824 | |
| 825 // return number of elements we at leasted wanted to initialize | |
| 826 return rfill + overflow; | |
| 827 } | |
| 828 | |
| 829 | |
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830 // Decode this java.lang.Class object into an instanceKlass, if possible. |
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831 // Throw IAE if not |
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832 instanceKlassHandle MethodHandles::resolve_instance_klass(oop java_mirror_oop, TRAPS) { |
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833 instanceKlassHandle empty; |
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834 klassOop caller = NULL; |
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835 if (java_lang_Class::is_instance(java_mirror_oop)) { |
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836 caller = java_lang_Class::as_klassOop(java_mirror_oop); |
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837 } |
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838 if (caller == NULL || !Klass::cast(caller)->oop_is_instance()) { |
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839 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not a class", empty); |
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840 } |
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841 return instanceKlassHandle(THREAD, caller); |
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842 } |
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843 |
| 710 | 844 |
| 845 | |
| 846 // Decode the vmtarget field of a method handle. | |
| 847 // Sanitize out methodOops, klassOops, and any other non-Java data. | |
| 848 // This is for debugging and reflection. | |
| 849 oop MethodHandles::encode_target(Handle mh, int format, TRAPS) { | |
| 850 assert(java_dyn_MethodHandle::is_instance(mh()), "must be a MH"); | |
| 851 if (format == ETF_HANDLE_OR_METHOD_NAME) { | |
| 852 oop target = java_dyn_MethodHandle::vmtarget(mh()); | |
| 853 if (target == NULL) { | |
| 854 return NULL; // unformed MH | |
| 855 } | |
| 856 klassOop tklass = target->klass(); | |
| 1142 | 857 if (Klass::cast(tklass)->is_subclass_of(SystemDictionary::Object_klass())) { |
| 710 | 858 return target; // target is another MH (or something else?) |
| 859 } | |
| 860 } | |
| 861 if (format == ETF_DIRECT_HANDLE) { | |
| 862 oop target = mh(); | |
| 863 for (;;) { | |
| 864 if (target->klass() == SystemDictionary::DirectMethodHandle_klass()) { | |
| 865 return target; | |
| 866 } | |
| 867 if (!java_dyn_MethodHandle::is_instance(target)){ | |
| 868 return NULL; // unformed MH | |
| 869 } | |
| 870 target = java_dyn_MethodHandle::vmtarget(target); | |
| 871 } | |
| 872 } | |
| 873 // cases of metadata in MH.vmtarget: | |
| 874 // - AMH can have methodOop for static invoke with bound receiver | |
| 875 // - DMH can have methodOop for static invoke (on variable receiver) | |
| 876 // - DMH can have klassOop for dispatched (non-static) invoke | |
| 877 klassOop receiver_limit = NULL; | |
| 878 int decode_flags = 0; | |
| 879 methodOop m = decode_MethodHandle(mh(), receiver_limit, decode_flags); | |
| 880 if (m == NULL) return NULL; | |
| 881 switch (format) { | |
| 882 case ETF_REFLECT_METHOD: | |
| 883 // same as jni_ToReflectedMethod: | |
| 884 if (m->is_initializer()) { | |
| 885 return Reflection::new_constructor(m, THREAD); | |
| 886 } else { | |
| 887 return Reflection::new_method(m, UseNewReflection, false, THREAD); | |
| 888 } | |
| 889 | |
| 890 case ETF_HANDLE_OR_METHOD_NAME: // method, not handle | |
| 891 case ETF_METHOD_NAME: | |
| 892 { | |
| 893 if (SystemDictionary::MemberName_klass() == NULL) break; | |
| 894 instanceKlassHandle mname_klass(THREAD, SystemDictionary::MemberName_klass()); | |
| 895 mname_klass->initialize(CHECK_NULL); | |
| 896 Handle mname = mname_klass->allocate_instance_handle(CHECK_NULL); | |
| 897 sun_dyn_MemberName::set_vmindex(mname(), VM_INDEX_UNINITIALIZED); | |
| 898 bool do_dispatch = ((decode_flags & MethodHandles::_dmf_does_dispatch) != 0); | |
| 899 init_MemberName(mname(), m, do_dispatch); | |
| 900 expand_MemberName(mname, 0, CHECK_NULL); | |
| 901 return mname(); | |
| 902 } | |
| 903 } | |
| 904 | |
| 905 // Unknown format code. | |
| 906 char msg[50]; | |
| 907 jio_snprintf(msg, sizeof(msg), "unknown getTarget format=%d", format); | |
| 908 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), msg); | |
| 909 } | |
| 910 | |
|
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911 static const char* always_null_names[] = { |
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912 "java/lang/Void", |
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913 "java/lang/Null", |
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914 //"java/lang/Nothing", |
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915 "sun/dyn/empty/Empty", |
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916 NULL |
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917 }; |
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918 |
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919 static bool is_always_null_type(klassOop klass) { |
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920 if (!Klass::cast(klass)->oop_is_instance()) return false; |
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921 instanceKlass* ik = instanceKlass::cast(klass); |
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922 // Must be on the boot class path: |
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923 if (ik->class_loader() != NULL) return false; |
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924 // Check the name. |
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925 symbolOop name = ik->name(); |
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926 for (int i = 0; ; i++) { |
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927 const char* test_name = always_null_names[i]; |
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928 if (test_name == NULL) break; |
|
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929 if (name->equals(test_name)) |
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930 return true; |
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931 } |
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932 return false; |
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933 } |
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934 |
| 710 | 935 bool MethodHandles::class_cast_needed(klassOop src, klassOop dst) { |
| 1142 | 936 if (src == dst || dst == SystemDictionary::Object_klass()) |
| 710 | 937 return false; // quickest checks |
| 938 Klass* srck = Klass::cast(src); | |
| 939 Klass* dstk = Klass::cast(dst); | |
| 940 if (dstk->is_interface()) { | |
| 941 // interface receivers can safely be viewed as untyped, | |
| 942 // because interface calls always include a dynamic check | |
| 1142 | 943 //dstk = Klass::cast(SystemDictionary::Object_klass()); |
| 710 | 944 return false; |
| 945 } | |
| 946 if (srck->is_interface()) { | |
| 947 // interface arguments must be viewed as untyped | |
| 1142 | 948 //srck = Klass::cast(SystemDictionary::Object_klass()); |
| 710 | 949 return true; |
| 950 } | |
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951 if (is_always_null_type(src)) { |
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952 // some source types are known to be never instantiated; |
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953 // they represent references which are always null |
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954 // such null references never fail to convert safely |
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955 return false; |
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956 } |
| 710 | 957 return !srck->is_subclass_of(dstk->as_klassOop()); |
| 958 } | |
| 959 | |
| 960 static oop object_java_mirror() { | |
| 1142 | 961 return Klass::cast(SystemDictionary::Object_klass())->java_mirror(); |
| 710 | 962 } |
| 963 | |
| 964 bool MethodHandles::same_basic_type_for_arguments(BasicType src, | |
| 965 BasicType dst, | |
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966 bool raw, |
| 710 | 967 bool for_return) { |
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968 if (for_return) { |
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969 // return values can always be forgotten: |
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970 if (dst == T_VOID) return true; |
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971 if (src == T_VOID) return raw && (dst == T_INT); |
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972 // We allow caller to receive a garbage int, which is harmless. |
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973 // This trick is pulled by trusted code (see VerifyType.canPassRaw). |
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974 } |
| 710 | 975 assert(src != T_VOID && dst != T_VOID, "should not be here"); |
| 976 if (src == dst) return true; | |
| 977 if (type2size[src] != type2size[dst]) return false; | |
| 978 // allow reinterpretation casts for integral widening | |
| 979 if (is_subword_type(src)) { // subwords can fit in int or other subwords | |
| 980 if (dst == T_INT) // any subword fits in an int | |
| 981 return true; | |
| 982 if (src == T_BOOLEAN) // boolean fits in any subword | |
| 983 return is_subword_type(dst); | |
| 984 if (src == T_BYTE && dst == T_SHORT) | |
| 985 return true; // remaining case: byte fits in short | |
| 986 } | |
| 987 // allow float/fixed reinterpretation casts | |
| 988 if (src == T_FLOAT) return dst == T_INT; | |
| 989 if (src == T_INT) return dst == T_FLOAT; | |
| 990 if (src == T_DOUBLE) return dst == T_LONG; | |
| 991 if (src == T_LONG) return dst == T_DOUBLE; | |
| 992 return false; | |
| 993 } | |
| 994 | |
| 995 const char* MethodHandles::check_method_receiver(methodOop m, | |
| 996 klassOop passed_recv_type) { | |
| 997 assert(!m->is_static(), "caller resp."); | |
| 998 if (passed_recv_type == NULL) | |
| 999 return "receiver type is primitive"; | |
| 1000 if (class_cast_needed(passed_recv_type, m->method_holder())) { | |
| 1001 Klass* formal = Klass::cast(m->method_holder()); | |
| 1002 return SharedRuntime::generate_class_cast_message("receiver type", | |
| 1003 formal->external_name()); | |
| 1004 } | |
| 1005 return NULL; // checks passed | |
| 1006 } | |
| 1007 | |
| 1008 // Verify that m's signature can be called type-safely by a method handle | |
| 1009 // of the given method type 'mtype'. | |
| 1010 // It takes a TRAPS argument because it must perform symbol lookups. | |
| 1011 void MethodHandles::verify_method_signature(methodHandle m, | |
| 1012 Handle mtype, | |
| 1013 int first_ptype_pos, | |
| 1014 KlassHandle insert_ptype, | |
| 1015 TRAPS) { | |
| 1016 objArrayHandle ptypes(THREAD, java_dyn_MethodType::ptypes(mtype())); | |
| 1017 int pnum = first_ptype_pos; | |
| 1018 int pmax = ptypes->length(); | |
| 1019 int mnum = 0; // method argument | |
| 1020 const char* err = NULL; | |
| 1021 for (SignatureStream ss(m->signature()); !ss.is_done(); ss.next()) { | |
| 1022 oop ptype_oop = NULL; | |
| 1023 if (ss.at_return_type()) { | |
| 1024 if (pnum != pmax) | |
| 1025 { err = "too many arguments"; break; } | |
| 1026 ptype_oop = java_dyn_MethodType::rtype(mtype()); | |
| 1027 } else { | |
| 1028 if (pnum >= pmax) | |
| 1029 { err = "not enough arguments"; break; } | |
| 1030 if (pnum >= 0) | |
| 1031 ptype_oop = ptypes->obj_at(pnum); | |
| 1032 else if (insert_ptype.is_null()) | |
| 1033 ptype_oop = NULL; | |
| 1034 else | |
| 1035 ptype_oop = insert_ptype->java_mirror(); | |
| 1036 pnum += 1; | |
| 1037 mnum += 1; | |
| 1038 } | |
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1039 klassOop pklass = NULL; |
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1040 BasicType ptype = T_OBJECT; |
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1041 if (ptype_oop != NULL) |
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1042 ptype = java_lang_Class::as_BasicType(ptype_oop, &pklass); |
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1043 else |
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1044 // null does not match any non-reference; use Object to report the error |
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1045 pklass = SystemDictionary::Object_klass(); |
| 710 | 1046 klassOop mklass = NULL; |
| 1047 BasicType mtype = ss.type(); | |
| 1048 if (mtype == T_ARRAY) mtype = T_OBJECT; // fold all refs to T_OBJECT | |
| 1049 if (mtype == T_OBJECT) { | |
| 1050 if (ptype_oop == NULL) { | |
| 1051 // null matches any reference | |
| 1052 continue; | |
| 1053 } | |
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1054 KlassHandle pklass_handle(THREAD, pklass); pklass = NULL; |
| 710 | 1055 // If we fail to resolve types at this point, we will throw an error. |
| 1056 symbolOop name_oop = ss.as_symbol(CHECK); | |
| 1057 symbolHandle name(THREAD, name_oop); | |
| 1058 instanceKlass* mk = instanceKlass::cast(m->method_holder()); | |
| 1059 Handle loader(THREAD, mk->class_loader()); | |
| 1060 Handle domain(THREAD, mk->protection_domain()); | |
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1061 mklass = SystemDictionary::resolve_or_null(name, loader, domain, CHECK); |
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1062 pklass = pklass_handle(); |
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1063 if (mklass == NULL && pklass != NULL && |
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1064 Klass::cast(pklass)->name() == name() && |
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1065 m->is_method_handle_invoke()) { |
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1066 // Assume a match. We can't really decode the signature of MH.invoke*. |
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1067 continue; |
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1068 } |
| 710 | 1069 } |
| 1070 if (!ss.at_return_type()) { | |
| 1071 err = check_argument_type_change(ptype, pklass, mtype, mklass, mnum); | |
| 1072 } else { | |
| 1073 err = check_return_type_change(mtype, mklass, ptype, pklass); // note reversal! | |
| 1074 } | |
| 1075 if (err != NULL) break; | |
| 1076 } | |
| 1077 | |
| 1078 if (err != NULL) { | |
| 1079 THROW_MSG(vmSymbols::java_lang_InternalError(), err); | |
| 1080 } | |
| 1081 } | |
| 1082 | |
| 1083 // Main routine for verifying the MethodHandle.type of a proposed | |
| 1084 // direct or bound-direct method handle. | |
| 1085 void MethodHandles::verify_method_type(methodHandle m, | |
| 1086 Handle mtype, | |
| 1087 bool has_bound_recv, | |
| 1088 KlassHandle bound_recv_type, | |
| 1089 TRAPS) { | |
| 1090 bool m_needs_receiver = !m->is_static(); | |
| 1091 | |
| 1092 const char* err = NULL; | |
| 1093 | |
| 1094 int first_ptype_pos = m_needs_receiver ? 1 : 0; | |
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1095 if (has_bound_recv) { |
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1096 first_ptype_pos -= 1; // ptypes do not include the bound argument; start earlier in them |
| 710 | 1097 if (m_needs_receiver && bound_recv_type.is_null()) |
| 1098 { err = "bound receiver is not an object"; goto die; } | |
| 1099 } | |
| 1100 | |
| 1101 if (m_needs_receiver && err == NULL) { | |
| 1102 objArrayOop ptypes = java_dyn_MethodType::ptypes(mtype()); | |
| 1103 if (ptypes->length() < first_ptype_pos) | |
| 1104 { err = "receiver argument is missing"; goto die; } | |
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1105 if (has_bound_recv) |
| 710 | 1106 err = check_method_receiver(m(), bound_recv_type->as_klassOop()); |
| 1107 else | |
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1108 err = check_method_receiver(m(), java_lang_Class::as_klassOop(ptypes->obj_at(first_ptype_pos-1))); |
| 710 | 1109 if (err != NULL) goto die; |
| 1110 } | |
| 1111 | |
| 1112 // Check the other arguments for mistypes. | |
| 1113 verify_method_signature(m, mtype, first_ptype_pos, bound_recv_type, CHECK); | |
| 1114 return; | |
| 1115 | |
| 1116 die: | |
| 1117 THROW_MSG(vmSymbols::java_lang_InternalError(), err); | |
| 1118 } | |
| 1119 | |
| 1120 void MethodHandles::verify_vmslots(Handle mh, TRAPS) { | |
| 1121 // Verify vmslots. | |
| 1122 int check_slots = argument_slot_count(java_dyn_MethodHandle::type(mh())); | |
| 1123 if (java_dyn_MethodHandle::vmslots(mh()) != check_slots) { | |
| 1124 THROW_MSG(vmSymbols::java_lang_InternalError(), "bad vmslots in BMH"); | |
| 1125 } | |
| 1126 } | |
| 1127 | |
| 1128 void MethodHandles::verify_vmargslot(Handle mh, int argnum, int argslot, TRAPS) { | |
| 1129 // Verify that argslot points at the given argnum. | |
| 1130 int check_slot = argument_slot(java_dyn_MethodHandle::type(mh()), argnum); | |
| 1131 if (argslot != check_slot || argslot < 0) { | |
| 1132 const char* fmt = "for argnum of %d, vmargslot is %d, should be %d"; | |
| 1133 size_t msglen = strlen(fmt) + 3*11 + 1; | |
| 1134 char* msg = NEW_RESOURCE_ARRAY(char, msglen); | |
| 1135 jio_snprintf(msg, msglen, fmt, argnum, argslot, check_slot); | |
| 1136 THROW_MSG(vmSymbols::java_lang_InternalError(), msg); | |
| 1137 } | |
| 1138 } | |
| 1139 | |
| 1140 // Verify the correspondence between two method types. | |
| 1141 // Apart from the advertised changes, caller method type X must | |
| 1142 // be able to invoke the callee method Y type with no violations | |
| 1143 // of type integrity. | |
| 1144 // Return NULL if all is well, else a short error message. | |
| 1145 const char* MethodHandles::check_method_type_change(oop src_mtype, int src_beg, int src_end, | |
| 1146 int insert_argnum, oop insert_type, | |
| 1147 int change_argnum, oop change_type, | |
| 1148 int delete_argnum, | |
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1149 oop dst_mtype, int dst_beg, int dst_end, |
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1150 bool raw) { |
| 710 | 1151 objArrayOop src_ptypes = java_dyn_MethodType::ptypes(src_mtype); |
| 1152 objArrayOop dst_ptypes = java_dyn_MethodType::ptypes(dst_mtype); | |
| 1153 | |
| 1154 int src_max = src_ptypes->length(); | |
| 1155 int dst_max = dst_ptypes->length(); | |
| 1156 | |
| 1157 if (src_end == -1) src_end = src_max; | |
| 1158 if (dst_end == -1) dst_end = dst_max; | |
| 1159 | |
| 1160 assert(0 <= src_beg && src_beg <= src_end && src_end <= src_max, "oob"); | |
| 1161 assert(0 <= dst_beg && dst_beg <= dst_end && dst_end <= dst_max, "oob"); | |
| 1162 | |
| 1163 // pending actions; set to -1 when done: | |
| 1164 int ins_idx = insert_argnum, chg_idx = change_argnum, del_idx = delete_argnum; | |
| 1165 | |
| 1166 const char* err = NULL; | |
| 1167 | |
| 1168 // Walk along each array of parameter types, including a virtual | |
| 1169 // NULL end marker at the end of each. | |
| 1170 for (int src_idx = src_beg, dst_idx = dst_beg; | |
| 1171 (src_idx <= src_end && dst_idx <= dst_end); | |
| 1172 src_idx++, dst_idx++) { | |
| 1173 oop src_type = (src_idx == src_end) ? oop(NULL) : src_ptypes->obj_at(src_idx); | |
| 1174 oop dst_type = (dst_idx == dst_end) ? oop(NULL) : dst_ptypes->obj_at(dst_idx); | |
| 1175 bool fix_null_src_type = false; | |
| 1176 | |
| 1177 // Perform requested edits. | |
| 1178 if (ins_idx == src_idx) { | |
| 1179 // note that the inserted guy is never affected by a change or deletion | |
| 1180 ins_idx = -1; | |
| 1181 src_type = insert_type; | |
| 1182 fix_null_src_type = true; | |
| 1183 --src_idx; // back up to process src type on next loop | |
| 1184 src_idx = src_end; | |
| 1185 } else { | |
| 1186 // note that the changed guy can be immediately deleted | |
| 1187 if (chg_idx == src_idx) { | |
| 1188 chg_idx = -1; | |
| 1189 assert(src_idx < src_end, "oob"); | |
| 1190 src_type = change_type; | |
| 1191 fix_null_src_type = true; | |
| 1192 } | |
| 1193 if (del_idx == src_idx) { | |
| 1194 del_idx = -1; | |
| 1195 assert(src_idx < src_end, "oob"); | |
| 1196 --dst_idx; | |
| 1197 continue; // rerun loop after skipping this position | |
| 1198 } | |
| 1199 } | |
| 1200 | |
| 1201 if (src_type == NULL && fix_null_src_type) | |
| 1202 // explicit null in this case matches any dest reference | |
| 1203 src_type = (java_lang_Class::is_primitive(dst_type) ? object_java_mirror() : dst_type); | |
| 1204 | |
| 1205 // Compare the two argument types. | |
| 1206 if (src_type != dst_type) { | |
| 1207 if (src_type == NULL) return "not enough arguments"; | |
| 1208 if (dst_type == NULL) return "too many arguments"; | |
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1209 err = check_argument_type_change(src_type, dst_type, dst_idx, raw); |
| 710 | 1210 if (err != NULL) return err; |
| 1211 } | |
| 1212 } | |
| 1213 | |
| 1214 // Now compare return types also. | |
| 1215 oop src_rtype = java_dyn_MethodType::rtype(src_mtype); | |
| 1216 oop dst_rtype = java_dyn_MethodType::rtype(dst_mtype); | |
| 1217 if (src_rtype != dst_rtype) { | |
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1218 err = check_return_type_change(dst_rtype, src_rtype, raw); // note reversal! |
| 710 | 1219 if (err != NULL) return err; |
| 1220 } | |
| 1221 | |
| 1222 assert(err == NULL, ""); | |
| 1223 return NULL; // all is well | |
| 1224 } | |
| 1225 | |
| 1226 | |
| 1227 const char* MethodHandles::check_argument_type_change(BasicType src_type, | |
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1228 klassOop src_klass, |
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1229 BasicType dst_type, |
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1230 klassOop dst_klass, |
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1231 int argnum, |
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1232 bool raw) { |
| 710 | 1233 const char* err = NULL; |
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1234 bool for_return = (argnum < 0); |
| 710 | 1235 |
| 1236 // just in case: | |
| 1237 if (src_type == T_ARRAY) src_type = T_OBJECT; | |
| 1238 if (dst_type == T_ARRAY) dst_type = T_OBJECT; | |
| 1239 | |
| 1240 // Produce some nice messages if VerifyMethodHandles is turned on: | |
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1241 if (!same_basic_type_for_arguments(src_type, dst_type, raw, for_return)) { |
| 710 | 1242 if (src_type == T_OBJECT) { |
|
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1243 if (raw && dst_type == T_INT && is_always_null_type(src_klass)) |
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1244 return NULL; // OK to convert a null pointer to a garbage int |
| 710 | 1245 err = ((argnum >= 0) |
| 1246 ? "type mismatch: passing a %s for method argument #%d, which expects primitive %s" | |
| 1247 : "type mismatch: returning a %s, but caller expects primitive %s"); | |
| 1248 } else if (dst_type == T_OBJECT) { | |
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1249 err = ((argnum >= 0) |
| 710 | 1250 ? "type mismatch: passing a primitive %s for method argument #%d, which expects %s" |
| 1251 : "type mismatch: returning a primitive %s, but caller expects %s"); | |
| 1252 } else { | |
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1253 err = ((argnum >= 0) |
| 710 | 1254 ? "type mismatch: passing a %s for method argument #%d, which expects %s" |
| 1255 : "type mismatch: returning a %s, but caller expects %s"); | |
| 1256 } | |
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1257 } else if (src_type == T_OBJECT && dst_type == T_OBJECT && |
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1258 class_cast_needed(src_klass, dst_klass)) { |
| 710 | 1259 if (!class_cast_needed(dst_klass, src_klass)) { |
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1260 if (raw) |
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1261 return NULL; // reverse cast is OK; the MH target is trusted to enforce it |
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1262 err = ((argnum >= 0) |
| 710 | 1263 ? "cast required: passing a %s for method argument #%d, which expects %s" |
| 1264 : "cast required: returning a %s, but caller expects %s"); | |
| 1265 } else { | |
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1266 err = ((argnum >= 0) |
| 710 | 1267 ? "reference mismatch: passing a %s for method argument #%d, which expects %s" |
| 1268 : "reference mismatch: returning a %s, but caller expects %s"); | |
| 1269 } | |
| 1270 } else { | |
| 1271 // passed the obstacle course | |
| 1272 return NULL; | |
| 1273 } | |
| 1274 | |
| 1275 // format, format, format | |
| 1276 const char* src_name = type2name(src_type); | |
| 1277 const char* dst_name = type2name(dst_type); | |
| 1278 if (src_type == T_OBJECT) src_name = Klass::cast(src_klass)->external_name(); | |
| 1279 if (dst_type == T_OBJECT) dst_name = Klass::cast(dst_klass)->external_name(); | |
| 1280 if (src_name == NULL) src_name = "unknown type"; | |
| 1281 if (dst_name == NULL) dst_name = "unknown type"; | |
| 1282 | |
| 1283 size_t msglen = strlen(err) + strlen(src_name) + strlen(dst_name) + (argnum < 10 ? 1 : 11); | |
| 1284 char* msg = NEW_RESOURCE_ARRAY(char, msglen + 1); | |
| 1285 if (argnum >= 0) { | |
| 1286 assert(strstr(err, "%d") != NULL, ""); | |
| 1287 jio_snprintf(msg, msglen, err, src_name, argnum, dst_name); | |
| 1288 } else { | |
| 1289 assert(strstr(err, "%d") == NULL, ""); | |
| 1290 jio_snprintf(msg, msglen, err, src_name, dst_name); | |
| 1291 } | |
| 1292 return msg; | |
| 1293 } | |
| 1294 | |
| 1295 // Compute the depth within the stack of the given argument, i.e., | |
| 1296 // the combined size of arguments to the right of the given argument. | |
| 1297 // For the last argument (ptypes.length-1) this will be zero. | |
| 1298 // For the first argument (0) this will be the size of all | |
| 1299 // arguments but that one. For the special number -1, this | |
| 1300 // will be the size of all arguments, including the first. | |
| 1301 // If the argument is neither -1 nor a valid argument index, | |
| 1302 // then return a negative number. Otherwise, the result | |
| 1303 // is in the range [0..vmslots] inclusive. | |
| 1304 int MethodHandles::argument_slot(oop method_type, int arg) { | |
| 1305 objArrayOop ptypes = java_dyn_MethodType::ptypes(method_type); | |
| 1306 int argslot = 0; | |
| 1307 int len = ptypes->length(); | |
| 1308 if (arg < -1 || arg >= len) return -99; | |
| 1309 for (int i = len-1; i > arg; i--) { | |
| 1310 BasicType bt = java_lang_Class::as_BasicType(ptypes->obj_at(i)); | |
| 1311 argslot += type2size[bt]; | |
| 1312 } | |
| 1313 assert(argument_slot_to_argnum(method_type, argslot) == arg, "inverse works"); | |
| 1314 return argslot; | |
| 1315 } | |
| 1316 | |
| 1317 // Given a slot number, return the argument number. | |
| 1318 int MethodHandles::argument_slot_to_argnum(oop method_type, int query_argslot) { | |
| 1319 objArrayOop ptypes = java_dyn_MethodType::ptypes(method_type); | |
| 1320 int argslot = 0; | |
| 1321 int len = ptypes->length(); | |
| 1322 for (int i = len-1; i >= 0; i--) { | |
| 1323 if (query_argslot == argslot) return i; | |
| 1324 BasicType bt = java_lang_Class::as_BasicType(ptypes->obj_at(i)); | |
| 1325 argslot += type2size[bt]; | |
| 1326 } | |
| 1327 // return pseudo-arg deepest in stack: | |
| 1328 if (query_argslot == argslot) return -1; | |
| 1329 return -99; // oob slot, or splitting a double-slot arg | |
| 1330 } | |
| 1331 | |
| 1332 methodHandle MethodHandles::dispatch_decoded_method(methodHandle m, | |
| 1333 KlassHandle receiver_limit, | |
| 1334 int decode_flags, | |
| 1335 KlassHandle receiver_klass, | |
| 1336 TRAPS) { | |
| 1337 assert((decode_flags & ~_DMF_DIRECT_MASK) == 0, "must be direct method reference"); | |
| 1338 assert((decode_flags & _dmf_has_receiver) != 0, "must have a receiver or first reference argument"); | |
| 1339 | |
| 1340 if (!m->is_static() && | |
| 1341 (receiver_klass.is_null() || !receiver_klass->is_subtype_of(m->method_holder()))) | |
| 1342 // given type does not match class of method, or receiver is null! | |
| 1343 // caller should have checked this, but let's be extra careful... | |
| 1344 return methodHandle(); | |
| 1345 | |
| 1346 if (receiver_limit.not_null() && | |
| 1347 (receiver_klass.not_null() && !receiver_klass->is_subtype_of(receiver_limit()))) | |
| 1348 // given type is not limited to the receiver type | |
| 1349 // note that a null receiver can match any reference value, for a static method | |
| 1350 return methodHandle(); | |
| 1351 | |
| 1352 if (!(decode_flags & MethodHandles::_dmf_does_dispatch)) { | |
| 1353 // pre-dispatched or static method (null receiver is OK for static) | |
| 1354 return m; | |
| 1355 | |
| 1356 } else if (receiver_klass.is_null()) { | |
| 1357 // null receiver value; cannot dispatch | |
| 1358 return methodHandle(); | |
| 1359 | |
| 1360 } else if (!(decode_flags & MethodHandles::_dmf_from_interface)) { | |
| 1361 // perform virtual dispatch | |
| 1362 int vtable_index = m->vtable_index(); | |
| 1363 guarantee(vtable_index >= 0, "valid vtable index"); | |
| 1364 | |
| 1365 // receiver_klass might be an arrayKlassOop but all vtables start at | |
| 1366 // the same place. The cast is to avoid virtual call and assertion. | |
| 1367 // See also LinkResolver::runtime_resolve_virtual_method. | |
| 1368 instanceKlass* inst = (instanceKlass*)Klass::cast(receiver_klass()); | |
| 1369 DEBUG_ONLY(inst->verify_vtable_index(vtable_index)); | |
| 1370 methodOop m_oop = inst->method_at_vtable(vtable_index); | |
| 1371 return methodHandle(THREAD, m_oop); | |
| 1372 | |
| 1373 } else { | |
| 1374 // perform interface dispatch | |
| 1375 int itable_index = klassItable::compute_itable_index(m()); | |
| 1376 guarantee(itable_index >= 0, "valid itable index"); | |
| 1377 instanceKlass* inst = instanceKlass::cast(receiver_klass()); | |
| 1378 methodOop m_oop = inst->method_at_itable(m->method_holder(), itable_index, THREAD); | |
| 1379 return methodHandle(THREAD, m_oop); | |
| 1380 } | |
| 1381 } | |
| 1382 | |
| 1383 void MethodHandles::verify_DirectMethodHandle(Handle mh, methodHandle m, TRAPS) { | |
| 1384 // Verify type. | |
| 1385 Handle mtype(THREAD, java_dyn_MethodHandle::type(mh())); | |
| 1386 verify_method_type(m, mtype, false, KlassHandle(), CHECK); | |
| 1387 | |
| 1388 // Verify vmslots. | |
| 1389 if (java_dyn_MethodHandle::vmslots(mh()) != m->size_of_parameters()) { | |
| 1390 THROW_MSG(vmSymbols::java_lang_InternalError(), "bad vmslots in DMH"); | |
| 1391 } | |
| 1392 } | |
| 1393 | |
| 1394 void MethodHandles::init_DirectMethodHandle(Handle mh, methodHandle m, bool do_dispatch, TRAPS) { | |
| 1395 // Check arguments. | |
| 1396 if (mh.is_null() || m.is_null() || | |
| 1397 (!do_dispatch && m->is_abstract())) { | |
| 1398 THROW(vmSymbols::java_lang_InternalError()); | |
| 1399 } | |
| 1400 | |
| 1401 java_dyn_MethodHandle::init_vmslots(mh()); | |
| 1402 | |
| 1403 if (VerifyMethodHandles) { | |
| 1404 // The privileged code which invokes this routine should not make | |
| 1405 // a mistake about types, but it's better to verify. | |
| 1406 verify_DirectMethodHandle(mh, m, CHECK); | |
| 1407 } | |
| 1408 | |
| 1409 // Finally, after safety checks are done, link to the target method. | |
| 1410 // We will follow the same path as the latter part of | |
| 1411 // InterpreterRuntime::resolve_invoke(), which first finds the method | |
| 1412 // and then decides how to populate the constant pool cache entry | |
| 1413 // that links the interpreter calls to the method. We need the same | |
| 1414 // bits, and will use the same calling sequence code. | |
| 1415 | |
| 1416 int vmindex = methodOopDesc::garbage_vtable_index; | |
| 1417 oop vmtarget = NULL; | |
| 1418 | |
| 1419 instanceKlass::cast(m->method_holder())->link_class(CHECK); | |
| 1420 | |
| 1421 MethodHandleEntry* me = NULL; | |
| 1422 if (do_dispatch && Klass::cast(m->method_holder())->is_interface()) { | |
| 1423 // We are simulating an invokeinterface instruction. | |
| 1424 // (We might also be simulating an invokevirtual on a miranda method, | |
| 1425 // but it is safe to treat it as an invokeinterface.) | |
| 1426 assert(!m->can_be_statically_bound(), "no final methods on interfaces"); | |
| 1427 vmindex = klassItable::compute_itable_index(m()); | |
| 1428 assert(vmindex >= 0, "(>=0) == do_dispatch"); | |
| 1429 // Set up same bits as ConstantPoolCacheEntry::set_interface_call(). | |
| 1430 vmtarget = m->method_holder(); // the interface | |
| 1431 me = MethodHandles::entry(MethodHandles::_invokeinterface_mh); | |
| 1432 } else if (!do_dispatch || m->can_be_statically_bound()) { | |
| 1433 // We are simulating an invokestatic or invokespecial instruction. | |
| 1434 // Set up the method pointer, just like ConstantPoolCacheEntry::set_method(). | |
| 1435 vmtarget = m(); | |
| 1436 // this does not help dispatch, but it will make it possible to parse this MH: | |
| 1437 vmindex = methodOopDesc::nonvirtual_vtable_index; | |
| 1438 assert(vmindex < 0, "(>=0) == do_dispatch"); | |
| 1439 if (!m->is_static()) { | |
| 1440 me = MethodHandles::entry(MethodHandles::_invokespecial_mh); | |
| 1441 } else { | |
| 1442 me = MethodHandles::entry(MethodHandles::_invokestatic_mh); | |
| 1443 // Part of the semantics of a static call is an initialization barrier. | |
| 1444 // For a DMH, it is done now, when the handle is created. | |
| 1445 Klass* k = Klass::cast(m->method_holder()); | |
| 1446 if (k->should_be_initialized()) { | |
| 1447 k->initialize(CHECK); | |
| 1448 } | |
| 1449 } | |
| 1450 } else { | |
| 1451 // We are simulating an invokevirtual instruction. | |
| 1452 // Set up the vtable index, just like ConstantPoolCacheEntry::set_method(). | |
| 1453 // The key logic is LinkResolver::runtime_resolve_virtual_method. | |
| 1454 vmindex = m->vtable_index(); | |
| 1455 vmtarget = m->method_holder(); | |
| 1456 me = MethodHandles::entry(MethodHandles::_invokevirtual_mh); | |
| 1457 } | |
| 1458 | |
| 1459 if (me == NULL) { THROW(vmSymbols::java_lang_InternalError()); } | |
| 1460 | |
| 1461 sun_dyn_DirectMethodHandle::set_vmtarget(mh(), vmtarget); | |
| 1462 sun_dyn_DirectMethodHandle::set_vmindex(mh(), vmindex); | |
| 1463 DEBUG_ONLY(int flags; klassOop rlimit); | |
| 1464 assert(MethodHandles::decode_method(mh(), rlimit, flags) == m(), | |
| 1465 "properly stored for later decoding"); | |
| 1466 DEBUG_ONLY(bool actual_do_dispatch = ((flags & _dmf_does_dispatch) != 0)); | |
| 1467 assert(!(actual_do_dispatch && !do_dispatch), | |
| 1468 "do not perform dispatch if !do_dispatch specified"); | |
| 1469 assert(actual_do_dispatch == (vmindex >= 0), "proper later decoding of do_dispatch"); | |
| 1470 assert(decode_MethodHandle_stack_pushes(mh()) == 0, "DMH does not move stack"); | |
| 1471 | |
| 1472 // Done! | |
| 1473 java_dyn_MethodHandle::set_vmentry(mh(), me); | |
| 1474 } | |
| 1475 | |
| 1476 void MethodHandles::verify_BoundMethodHandle_with_receiver(Handle mh, | |
| 1477 methodHandle m, | |
| 1478 TRAPS) { | |
| 1479 // Verify type. | |
| 1480 oop receiver = sun_dyn_BoundMethodHandle::argument(mh()); | |
| 1481 Handle mtype(THREAD, java_dyn_MethodHandle::type(mh())); | |
| 1482 KlassHandle bound_recv_type; | |
| 1483 if (receiver != NULL) bound_recv_type = KlassHandle(THREAD, receiver->klass()); | |
| 1484 verify_method_type(m, mtype, true, bound_recv_type, CHECK); | |
| 1485 | |
| 1486 int receiver_pos = m->size_of_parameters() - 1; | |
| 1487 | |
| 1488 // Verify MH.vmargslot, which should point at the bound receiver. | |
| 1489 verify_vmargslot(mh, -1, sun_dyn_BoundMethodHandle::vmargslot(mh()), CHECK); | |
| 1490 //verify_vmslots(mh, CHECK); | |
| 1491 | |
| 1492 // Verify vmslots. | |
| 1493 if (java_dyn_MethodHandle::vmslots(mh()) != receiver_pos) { | |
| 1494 THROW_MSG(vmSymbols::java_lang_InternalError(), "bad vmslots in BMH (receiver)"); | |
| 1495 } | |
| 1496 } | |
| 1497 | |
| 1498 // Initialize a BMH with a receiver bound directly to a methodOop. | |
| 1499 void MethodHandles::init_BoundMethodHandle_with_receiver(Handle mh, | |
| 1500 methodHandle original_m, | |
| 1501 KlassHandle receiver_limit, | |
| 1502 int decode_flags, | |
| 1503 TRAPS) { | |
| 1504 // Check arguments. | |
| 1505 if (mh.is_null() || original_m.is_null()) { | |
| 1506 THROW(vmSymbols::java_lang_InternalError()); | |
| 1507 } | |
| 1508 | |
| 1509 KlassHandle receiver_klass; | |
| 1510 { | |
| 1511 oop receiver_oop = sun_dyn_BoundMethodHandle::argument(mh()); | |
| 1512 if (receiver_oop != NULL) | |
| 1513 receiver_klass = KlassHandle(THREAD, receiver_oop->klass()); | |
| 1514 } | |
| 1515 methodHandle m = dispatch_decoded_method(original_m, | |
| 1516 receiver_limit, decode_flags, | |
| 1517 receiver_klass, | |
| 1518 CHECK); | |
| 1519 if (m.is_null()) { THROW(vmSymbols::java_lang_InternalError()); } | |
| 1520 if (m->is_abstract()) { THROW(vmSymbols::java_lang_AbstractMethodError()); } | |
| 1521 | |
| 1522 java_dyn_MethodHandle::init_vmslots(mh()); | |
| 1523 | |
| 1524 if (VerifyMethodHandles) { | |
| 1525 verify_BoundMethodHandle_with_receiver(mh, m, CHECK); | |
| 1526 } | |
| 1527 | |
| 1528 sun_dyn_BoundMethodHandle::set_vmtarget(mh(), m()); | |
| 1529 | |
| 1530 DEBUG_ONLY(int junk; klassOop junk2); | |
| 1531 assert(MethodHandles::decode_method(mh(), junk2, junk) == m(), "properly stored for later decoding"); | |
| 1532 assert(decode_MethodHandle_stack_pushes(mh()) == 1, "BMH pushes one stack slot"); | |
| 1533 | |
| 1534 // Done! | |
| 1535 java_dyn_MethodHandle::set_vmentry(mh(), MethodHandles::entry(MethodHandles::_bound_ref_direct_mh)); | |
| 1536 } | |
| 1537 | |
| 1538 void MethodHandles::verify_BoundMethodHandle(Handle mh, Handle target, int argnum, | |
| 1539 bool direct_to_method, TRAPS) { | |
| 1540 Handle ptype_handle(THREAD, | |
| 1541 java_dyn_MethodType::ptype(java_dyn_MethodHandle::type(target()), argnum)); | |
| 1542 KlassHandle ptype_klass; | |
| 1543 BasicType ptype = java_lang_Class::as_BasicType(ptype_handle(), &ptype_klass); | |
| 1544 int slots_pushed = type2size[ptype]; | |
| 1545 | |
| 1546 oop argument = sun_dyn_BoundMethodHandle::argument(mh()); | |
| 1547 | |
| 1548 const char* err = NULL; | |
| 1549 | |
| 1550 switch (ptype) { | |
| 1551 case T_OBJECT: | |
| 1552 if (argument != NULL) | |
| 1553 // we must implicitly convert from the arg type to the outgoing ptype | |
| 1554 err = check_argument_type_change(T_OBJECT, argument->klass(), ptype, ptype_klass(), argnum); | |
| 1555 break; | |
| 1556 | |
| 1557 case T_ARRAY: case T_VOID: | |
| 1558 assert(false, "array, void do not appear here"); | |
| 1559 default: | |
| 1560 if (ptype != T_INT && !is_subword_type(ptype)) { | |
| 1561 err = "unexpected parameter type"; | |
| 1562 break; | |
| 1563 } | |
| 1564 // check subrange of Integer.value, if necessary | |
| 1142 | 1565 if (argument == NULL || argument->klass() != SystemDictionary::Integer_klass()) { |
| 710 | 1566 err = "bound integer argument must be of type java.lang.Integer"; |
| 1567 break; | |
| 1568 } | |
| 1569 if (ptype != T_INT) { | |
| 1570 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT); | |
| 1571 jint value = argument->int_field(value_offset); | |
| 1572 int vminfo = adapter_subword_vminfo(ptype); | |
| 1573 jint subword = truncate_subword_from_vminfo(value, vminfo); | |
| 1574 if (value != subword) { | |
| 1575 err = "bound subword value does not fit into the subword type"; | |
| 1576 break; | |
| 1577 } | |
| 1578 } | |
| 1579 break; | |
| 1580 case T_FLOAT: | |
| 1581 case T_DOUBLE: | |
| 1582 case T_LONG: | |
| 1583 { | |
| 1584 // we must implicitly convert from the unboxed arg type to the outgoing ptype | |
| 1585 BasicType argbox = java_lang_boxing_object::basic_type(argument); | |
| 1586 if (argbox != ptype) { | |
| 1587 err = check_argument_type_change(T_OBJECT, (argument == NULL | |
| 1142 | 1588 ? SystemDictionary::Object_klass() |
| 710 | 1589 : argument->klass()), |
| 1590 ptype, ptype_klass(), argnum); | |
| 1591 assert(err != NULL, "this must be an error"); | |
| 1592 } | |
| 1593 break; | |
| 1594 } | |
| 1595 } | |
| 1596 | |
| 1597 if (err == NULL) { | |
| 1598 DEBUG_ONLY(int this_pushes = decode_MethodHandle_stack_pushes(mh())); | |
| 1599 if (direct_to_method) { | |
| 1600 assert(this_pushes == slots_pushed, "BMH pushes one or two stack slots"); | |
| 1601 assert(slots_pushed <= MethodHandlePushLimit, ""); | |
| 1602 } else { | |
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1603 int target_pushes = decode_MethodHandle_stack_pushes(target()); |
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1604 assert(this_pushes == slots_pushed + target_pushes, "BMH stack motion must be correct"); |
| 710 | 1605 // do not blow the stack; use a Java-based adapter if this limit is exceeded |
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1606 // FIXME |
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1607 // if (slots_pushed + target_pushes > MethodHandlePushLimit) |
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1608 // err = "too many bound parameters"; |
| 710 | 1609 } |
| 1610 } | |
| 1611 | |
| 1612 if (err == NULL) { | |
| 1613 // Verify the rest of the method type. | |
| 1614 err = check_method_type_insertion(java_dyn_MethodHandle::type(mh()), | |
| 1615 argnum, ptype_handle(), | |
| 1616 java_dyn_MethodHandle::type(target())); | |
| 1617 } | |
| 1618 | |
| 1619 if (err != NULL) { | |
| 1620 THROW_MSG(vmSymbols::java_lang_InternalError(), err); | |
| 1621 } | |
| 1622 } | |
| 1623 | |
| 1624 void MethodHandles::init_BoundMethodHandle(Handle mh, Handle target, int argnum, TRAPS) { | |
| 1625 // Check arguments. | |
| 1626 if (mh.is_null() || target.is_null() || !java_dyn_MethodHandle::is_instance(target())) { | |
| 1627 THROW(vmSymbols::java_lang_InternalError()); | |
| 1628 } | |
| 1629 | |
| 1630 java_dyn_MethodHandle::init_vmslots(mh()); | |
| 1631 | |
| 1632 if (VerifyMethodHandles) { | |
| 1633 int insert_after = argnum - 1; | |
| 1634 verify_vmargslot(mh, insert_after, sun_dyn_BoundMethodHandle::vmargslot(mh()), CHECK); | |
| 1635 verify_vmslots(mh, CHECK); | |
| 1636 } | |
| 1637 | |
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1638 // Get bound type and required slots. |
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1639 oop ptype_oop = java_dyn_MethodType::ptype(java_dyn_MethodHandle::type(target()), argnum); |
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1640 BasicType ptype = java_lang_Class::as_BasicType(ptype_oop); |
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1641 int slots_pushed = type2size[ptype]; |
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1642 |
| 710 | 1643 // If (a) the target is a direct non-dispatched method handle, |
| 1644 // or (b) the target is a dispatched direct method handle and we | |
| 1645 // are binding the receiver, cut out the middle-man. | |
| 1646 // Do this by decoding the DMH and using its methodOop directly as vmtarget. | |
| 1647 bool direct_to_method = false; | |
| 1648 if (OptimizeMethodHandles && | |
| 1649 target->klass() == SystemDictionary::DirectMethodHandle_klass() && | |
| 1650 (argnum == 0 || sun_dyn_DirectMethodHandle::vmindex(target()) < 0)) { | |
| 1651 int decode_flags = 0; klassOop receiver_limit_oop = NULL; | |
| 1652 methodHandle m(THREAD, decode_method(target(), receiver_limit_oop, decode_flags)); | |
| 1653 if (m.is_null()) { THROW_MSG(vmSymbols::java_lang_InternalError(), "DMH failed to decode"); } | |
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1654 DEBUG_ONLY(int m_vmslots = m->size_of_parameters() - slots_pushed); // pos. of 1st arg. |
| 710 | 1655 assert(sun_dyn_BoundMethodHandle::vmslots(mh()) == m_vmslots, "type w/ m sig"); |
| 1656 if (argnum == 0 && (decode_flags & _dmf_has_receiver) != 0) { | |
| 1657 KlassHandle receiver_limit(THREAD, receiver_limit_oop); | |
| 1658 init_BoundMethodHandle_with_receiver(mh, m, | |
| 1659 receiver_limit, decode_flags, | |
| 1660 CHECK); | |
| 1661 return; | |
| 1662 } | |
| 1663 | |
| 1664 // Even if it is not a bound receiver, we still might be able | |
| 1665 // to bind another argument and still invoke the methodOop directly. | |
| 1666 if (!(decode_flags & _dmf_does_dispatch)) { | |
| 1667 direct_to_method = true; | |
| 1668 sun_dyn_BoundMethodHandle::set_vmtarget(mh(), m()); | |
| 1669 } | |
| 1670 } | |
| 1671 if (!direct_to_method) | |
| 1672 sun_dyn_BoundMethodHandle::set_vmtarget(mh(), target()); | |
| 1673 | |
| 1674 if (VerifyMethodHandles) { | |
| 1675 verify_BoundMethodHandle(mh, target, argnum, direct_to_method, CHECK); | |
| 1676 } | |
| 1677 | |
| 1678 // Next question: Is this a ref, int, or long bound value? | |
| 1679 MethodHandleEntry* me = NULL; | |
| 1680 if (ptype == T_OBJECT) { | |
| 1681 if (direct_to_method) me = MethodHandles::entry(_bound_ref_direct_mh); | |
| 1682 else me = MethodHandles::entry(_bound_ref_mh); | |
| 1683 } else if (slots_pushed == 2) { | |
| 1684 if (direct_to_method) me = MethodHandles::entry(_bound_long_direct_mh); | |
| 1685 else me = MethodHandles::entry(_bound_long_mh); | |
| 1686 } else if (slots_pushed == 1) { | |
| 1687 if (direct_to_method) me = MethodHandles::entry(_bound_int_direct_mh); | |
| 1688 else me = MethodHandles::entry(_bound_int_mh); | |
| 1689 } else { | |
| 1690 assert(false, ""); | |
| 1691 } | |
| 1692 | |
| 1693 // Done! | |
| 1694 java_dyn_MethodHandle::set_vmentry(mh(), me); | |
| 1695 } | |
| 1696 | |
| 1697 static void throw_InternalError_for_bad_conversion(int conversion, const char* err, TRAPS) { | |
| 1698 char msg[200]; | |
| 1699 jio_snprintf(msg, sizeof(msg), "bad adapter (conversion=0x%08x): %s", conversion, err); | |
| 1700 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), msg); | |
| 1701 } | |
| 1702 | |
| 1703 void MethodHandles::verify_AdapterMethodHandle(Handle mh, int argnum, TRAPS) { | |
| 1704 jint conversion = sun_dyn_AdapterMethodHandle::conversion(mh()); | |
| 1705 int argslot = sun_dyn_AdapterMethodHandle::vmargslot(mh()); | |
| 1706 | |
| 1707 verify_vmargslot(mh, argnum, argslot, CHECK); | |
| 1708 verify_vmslots(mh, CHECK); | |
| 1709 | |
| 1710 jint conv_op = adapter_conversion_op(conversion); | |
| 1711 if (!conv_op_valid(conv_op)) { | |
| 1712 throw_InternalError_for_bad_conversion(conversion, "unknown conversion op", THREAD); | |
| 1713 return; | |
| 1714 } | |
| 1715 EntryKind ek = adapter_entry_kind(conv_op); | |
| 1716 | |
| 1717 int stack_move = adapter_conversion_stack_move(conversion); | |
| 1718 BasicType src = adapter_conversion_src_type(conversion); | |
| 1719 BasicType dest = adapter_conversion_dest_type(conversion); | |
| 1720 int vminfo = adapter_conversion_vminfo(conversion); // should be zero | |
| 1721 | |
| 1722 Handle argument(THREAD, sun_dyn_AdapterMethodHandle::argument(mh())); | |
| 1723 Handle target(THREAD, sun_dyn_AdapterMethodHandle::vmtarget(mh())); | |
| 1724 Handle src_mtype(THREAD, java_dyn_MethodHandle::type(mh())); | |
| 1725 Handle dst_mtype(THREAD, java_dyn_MethodHandle::type(target())); | |
| 1726 | |
| 1727 const char* err = NULL; | |
| 1728 | |
| 1729 if (err == NULL) { | |
| 1730 // Check that the correct argument is supplied, but only if it is required. | |
| 1731 switch (ek) { | |
| 1732 case _adapter_check_cast: // target type of cast | |
| 1733 case _adapter_ref_to_prim: // wrapper type from which to unbox | |
| 1734 case _adapter_prim_to_ref: // wrapper type to box into | |
| 1735 case _adapter_collect_args: // array type to collect into | |
| 1736 case _adapter_spread_args: // array type to spread from | |
| 1737 if (!java_lang_Class::is_instance(argument()) | |
| 1738 || java_lang_Class::is_primitive(argument())) | |
| 1739 { err = "adapter requires argument of type java.lang.Class"; break; } | |
| 1740 if (ek == _adapter_collect_args || | |
| 1741 ek == _adapter_spread_args) { | |
| 1742 // Make sure it is a suitable collection type. (Array, for now.) | |
| 1743 Klass* ak = Klass::cast(java_lang_Class::as_klassOop(argument())); | |
| 1744 if (!ak->oop_is_objArray()) { | |
| 1745 { err = "adapter requires argument of type java.lang.Class<Object[]>"; break; } | |
| 1746 } | |
| 1747 } | |
| 1748 break; | |
| 1749 case _adapter_flyby: | |
| 1750 case _adapter_ricochet: | |
| 1751 if (!java_dyn_MethodHandle::is_instance(argument())) | |
| 1752 { err = "MethodHandle adapter argument required"; break; } | |
| 1753 break; | |
| 1754 default: | |
| 1755 if (argument.not_null()) | |
| 1756 { err = "adapter has spurious argument"; break; } | |
| 1757 break; | |
| 1758 } | |
| 1759 } | |
| 1760 | |
| 1761 if (err == NULL) { | |
| 1762 // Check that the src/dest types are supplied if needed. | |
| 1763 switch (ek) { | |
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1764 case _adapter_check_cast: |
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1765 if (src != T_OBJECT || dest != T_OBJECT) { |
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1766 err = "adapter requires object src/dest conversion subfields"; |
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1767 } |
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1768 break; |
| 710 | 1769 case _adapter_prim_to_prim: |
| 1770 if (!is_java_primitive(src) || !is_java_primitive(dest) || src == dest) { | |
| 1771 err = "adapter requires primitive src/dest conversion subfields"; break; | |
| 1772 } | |
| 1773 if ( (src == T_FLOAT || src == T_DOUBLE) && !(dest == T_FLOAT || dest == T_DOUBLE) || | |
| 1774 !(src == T_FLOAT || src == T_DOUBLE) && (dest == T_FLOAT || dest == T_DOUBLE)) { | |
| 1775 err = "adapter cannot convert beween floating and fixed-point"; break; | |
| 1776 } | |
| 1777 break; | |
| 1778 case _adapter_ref_to_prim: | |
| 1779 if (src != T_OBJECT || !is_java_primitive(dest) | |
| 1780 || argument() != Klass::cast(SystemDictionary::box_klass(dest))->java_mirror()) { | |
| 1781 err = "adapter requires primitive dest conversion subfield"; break; | |
| 1782 } | |
| 1783 break; | |
| 1784 case _adapter_prim_to_ref: | |
| 1785 if (!is_java_primitive(src) || dest != T_OBJECT | |
| 1786 || argument() != Klass::cast(SystemDictionary::box_klass(src))->java_mirror()) { | |
| 1787 err = "adapter requires primitive src conversion subfield"; break; | |
| 1788 } | |
| 1789 break; | |
| 1790 case _adapter_swap_args: | |
| 1791 case _adapter_rot_args: | |
| 1792 { | |
| 1793 if (!src || src != dest) { | |
| 1794 err = "adapter requires src/dest conversion subfields for swap"; break; | |
| 1795 } | |
| 1796 int swap_size = type2size[src]; | |
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1797 oop src_mtype = sun_dyn_AdapterMethodHandle::type(mh()); |
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1798 oop dest_mtype = sun_dyn_AdapterMethodHandle::type(target()); |
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1799 int slot_limit = sun_dyn_AdapterMethodHandle::vmslots(target()); |
| 710 | 1800 int src_slot = argslot; |
| 1801 int dest_slot = vminfo; | |
| 1802 bool rotate_up = (src_slot > dest_slot); // upward rotation | |
| 1803 int src_arg = argnum; | |
| 1804 int dest_arg = argument_slot_to_argnum(dest_mtype, dest_slot); | |
| 1805 verify_vmargslot(mh, dest_arg, dest_slot, CHECK); | |
| 1806 if (!(dest_slot >= src_slot + swap_size) && | |
| 1807 !(src_slot >= dest_slot + swap_size)) { | |
| 1808 err = "source, destination slots must be distinct"; | |
| 1809 } else if (ek == _adapter_swap_args && !(src_slot > dest_slot)) { | |
| 1810 err = "source of swap must be deeper in stack"; | |
| 1811 } else if (ek == _adapter_swap_args) { | |
| 1812 err = check_argument_type_change(java_dyn_MethodType::ptype(src_mtype, dest_arg), | |
| 1813 java_dyn_MethodType::ptype(dest_mtype, src_arg), | |
| 1814 dest_arg); | |
| 1815 } else if (ek == _adapter_rot_args) { | |
| 1816 if (rotate_up) { | |
| 1817 assert((src_slot > dest_slot) && (src_arg < dest_arg), ""); | |
| 1818 // rotate up: [dest_slot..src_slot-ss] --> [dest_slot+ss..src_slot] | |
| 1819 // that is: [src_arg+1..dest_arg] --> [src_arg..dest_arg-1] | |
| 1820 for (int i = src_arg+1; i <= dest_arg && err == NULL; i++) { | |
| 1821 err = check_argument_type_change(java_dyn_MethodType::ptype(src_mtype, i), | |
| 1822 java_dyn_MethodType::ptype(dest_mtype, i-1), | |
| 1823 i); | |
| 1824 } | |
| 1825 } else { // rotate down | |
| 1826 assert((src_slot < dest_slot) && (src_arg > dest_arg), ""); | |
| 1827 // rotate down: [src_slot+ss..dest_slot] --> [src_slot..dest_slot-ss] | |
| 1828 // that is: [dest_arg..src_arg-1] --> [dst_arg+1..src_arg] | |
| 1829 for (int i = dest_arg; i <= src_arg-1 && err == NULL; i++) { | |
| 1830 err = check_argument_type_change(java_dyn_MethodType::ptype(src_mtype, i), | |
| 1831 java_dyn_MethodType::ptype(dest_mtype, i+1), | |
| 1832 i); | |
| 1833 } | |
| 1834 } | |
| 1835 } | |
| 1836 if (err == NULL) | |
| 1837 err = check_argument_type_change(java_dyn_MethodType::ptype(src_mtype, src_arg), | |
| 1838 java_dyn_MethodType::ptype(dest_mtype, dest_arg), | |
| 1839 src_arg); | |
| 1840 } | |
| 1841 break; | |
| 1842 case _adapter_collect_args: | |
| 1843 case _adapter_spread_args: | |
| 1844 { | |
| 1845 BasicType coll_type = (ek == _adapter_collect_args) ? dest : src; | |
| 1846 BasicType elem_type = (ek == _adapter_collect_args) ? src : dest; | |
| 1847 if (coll_type != T_OBJECT || elem_type != T_OBJECT) { | |
| 1848 err = "adapter requires src/dest subfields"; break; | |
| 1849 // later: | |
| 1850 // - consider making coll be a primitive array | |
| 1851 // - consider making coll be a heterogeneous collection | |
| 1852 } | |
| 1853 } | |
| 1854 break; | |
| 1855 default: | |
| 1856 if (src != 0 || dest != 0) { | |
| 1857 err = "adapter has spurious src/dest conversion subfields"; break; | |
| 1858 } | |
| 1859 break; | |
| 1860 } | |
| 1861 } | |
| 1862 | |
| 1863 if (err == NULL) { | |
| 1864 // Check the stack_move subfield. | |
| 1865 // It must always report the net change in stack size, positive or negative. | |
| 1866 int slots_pushed = stack_move / stack_move_unit(); | |
| 1867 switch (ek) { | |
| 1868 case _adapter_prim_to_prim: | |
| 1869 case _adapter_ref_to_prim: | |
| 1870 case _adapter_prim_to_ref: | |
| 1871 if (slots_pushed != type2size[dest] - type2size[src]) { | |
| 1872 err = "wrong stack motion for primitive conversion"; | |
| 1873 } | |
| 1874 break; | |
| 1875 case _adapter_dup_args: | |
| 1876 if (slots_pushed <= 0) { | |
| 1877 err = "adapter requires conversion subfield slots_pushed > 0"; | |
| 1878 } | |
| 1879 break; | |
| 1880 case _adapter_drop_args: | |
| 1881 if (slots_pushed >= 0) { | |
| 1882 err = "adapter requires conversion subfield slots_pushed < 0"; | |
| 1883 } | |
| 1884 break; | |
| 1885 case _adapter_collect_args: | |
| 1886 if (slots_pushed > 1) { | |
| 1887 err = "adapter requires conversion subfield slots_pushed <= 1"; | |
| 1888 } | |
| 1889 break; | |
| 1890 case _adapter_spread_args: | |
| 1891 if (slots_pushed < -1) { | |
| 1892 err = "adapter requires conversion subfield slots_pushed >= -1"; | |
| 1893 } | |
| 1894 break; | |
| 1895 default: | |
| 1896 if (stack_move != 0) { | |
| 1897 err = "adapter has spurious stack_move conversion subfield"; | |
| 1898 } | |
| 1899 break; | |
| 1900 } | |
| 1901 if (err == NULL && stack_move != slots_pushed * stack_move_unit()) { | |
| 1902 err = "stack_move conversion subfield must be multiple of stack_move_unit"; | |
| 1903 } | |
| 1904 } | |
| 1905 | |
| 1906 if (err == NULL) { | |
| 1907 // Make sure this adapter does not push too deeply. | |
| 1908 int slots_pushed = stack_move / stack_move_unit(); | |
| 1909 int this_vmslots = java_dyn_MethodHandle::vmslots(mh()); | |
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1910 int target_vmslots = java_dyn_MethodHandle::vmslots(target()); |
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1911 if (slots_pushed != (target_vmslots - this_vmslots)) { |
| 710 | 1912 err = "stack_move inconsistent with previous and current MethodType vmslots"; |
| 1913 } else if (slots_pushed > 0) { | |
| 1914 // verify stack_move against MethodHandlePushLimit | |
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1915 int target_pushes = decode_MethodHandle_stack_pushes(target()); |
| 710 | 1916 // do not blow the stack; use a Java-based adapter if this limit is exceeded |
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1917 if (slots_pushed + target_pushes > MethodHandlePushLimit) { |
| 710 | 1918 err = "adapter pushes too many parameters"; |
| 1919 } | |
| 1920 } | |
| 1921 | |
| 1922 // While we're at it, check that the stack motion decoder works: | |
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1923 DEBUG_ONLY(int target_pushes = decode_MethodHandle_stack_pushes(target())); |
| 710 | 1924 DEBUG_ONLY(int this_pushes = decode_MethodHandle_stack_pushes(mh())); |
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1925 assert(this_pushes == slots_pushed + target_pushes, "AMH stack motion must be correct"); |
| 710 | 1926 } |
| 1927 | |
| 1928 if (err == NULL && vminfo != 0) { | |
| 1929 switch (ek) { | |
| 1930 case _adapter_swap_args: | |
| 1931 case _adapter_rot_args: | |
| 1932 break; // OK | |
| 1933 default: | |
| 1934 err = "vminfo subfield is reserved to the JVM"; | |
| 1935 } | |
| 1936 } | |
| 1937 | |
| 1938 // Do additional ad hoc checks. | |
| 1939 if (err == NULL) { | |
| 1940 switch (ek) { | |
| 1941 case _adapter_retype_only: | |
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1942 err = check_method_type_passthrough(src_mtype(), dst_mtype(), false); |
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1943 break; |
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1944 |
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1945 case _adapter_retype_raw: |
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1946 err = check_method_type_passthrough(src_mtype(), dst_mtype(), true); |
| 710 | 1947 break; |
| 1948 | |
| 1949 case _adapter_check_cast: | |
| 1950 { | |
| 1951 // The actual value being checked must be a reference: | |
| 1952 err = check_argument_type_change(java_dyn_MethodType::ptype(src_mtype(), argnum), | |
| 1953 object_java_mirror(), argnum); | |
| 1954 if (err != NULL) break; | |
| 1955 | |
| 1956 // The output of the cast must fit with the destination argument: | |
| 1957 Handle cast_class = argument; | |
| 1958 err = check_method_type_conversion(src_mtype(), | |
| 1959 argnum, cast_class(), | |
| 1960 dst_mtype()); | |
| 1961 } | |
| 1962 break; | |
| 1963 | |
| 1964 // %%% TO DO: continue in remaining cases to verify src/dst_mtype if VerifyMethodHandles | |
| 1965 } | |
| 1966 } | |
| 1967 | |
| 1968 if (err != NULL) { | |
| 1969 throw_InternalError_for_bad_conversion(conversion, err, THREAD); | |
| 1970 return; | |
| 1971 } | |
| 1972 | |
| 1973 } | |
| 1974 | |
| 1975 void MethodHandles::init_AdapterMethodHandle(Handle mh, Handle target, int argnum, TRAPS) { | |
| 1976 oop argument = sun_dyn_AdapterMethodHandle::argument(mh()); | |
| 1977 int argslot = sun_dyn_AdapterMethodHandle::vmargslot(mh()); | |
| 1978 jint conversion = sun_dyn_AdapterMethodHandle::conversion(mh()); | |
| 1979 jint conv_op = adapter_conversion_op(conversion); | |
| 1980 | |
| 1981 // adjust the adapter code to the internal EntryKind enumeration: | |
| 1982 EntryKind ek_orig = adapter_entry_kind(conv_op); | |
| 1983 EntryKind ek_opt = ek_orig; // may be optimized | |
| 1984 | |
| 1985 // Finalize the vmtarget field (Java initialized it to null). | |
| 1986 if (!java_dyn_MethodHandle::is_instance(target())) { | |
| 1987 throw_InternalError_for_bad_conversion(conversion, "bad target", THREAD); | |
| 1988 return; | |
| 1989 } | |
| 1990 sun_dyn_AdapterMethodHandle::set_vmtarget(mh(), target()); | |
| 1991 | |
| 1992 if (VerifyMethodHandles) { | |
| 1993 verify_AdapterMethodHandle(mh, argnum, CHECK); | |
| 1994 } | |
| 1995 | |
| 1996 int stack_move = adapter_conversion_stack_move(conversion); | |
| 1997 BasicType src = adapter_conversion_src_type(conversion); | |
| 1998 BasicType dest = adapter_conversion_dest_type(conversion); | |
| 1999 int vminfo = adapter_conversion_vminfo(conversion); // should be zero | |
| 2000 | |
| 2001 const char* err = NULL; | |
| 2002 | |
| 2003 // Now it's time to finish the case analysis and pick a MethodHandleEntry. | |
| 2004 switch (ek_orig) { | |
| 2005 case _adapter_retype_only: | |
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2006 case _adapter_retype_raw: |
| 710 | 2007 case _adapter_check_cast: |
| 2008 case _adapter_dup_args: | |
| 2009 case _adapter_drop_args: | |
| 2010 // these work fine via general case code | |
| 2011 break; | |
| 2012 | |
| 2013 case _adapter_prim_to_prim: | |
| 2014 { | |
| 2015 // Non-subword cases are {int,float,long,double} -> {int,float,long,double}. | |
| 2016 // And, the {float,double} -> {int,long} cases must be handled by Java. | |
| 2017 switch (type2size[src] *4+ type2size[dest]) { | |
| 2018 case 1 *4+ 1: | |
| 2019 assert(src == T_INT || is_subword_type(src), "source is not float"); | |
| 2020 // Subword-related cases are int -> {boolean,byte,char,short}. | |
| 2021 ek_opt = _adapter_opt_i2i; | |
| 2022 vminfo = adapter_subword_vminfo(dest); | |
| 2023 break; | |
| 2024 case 2 *4+ 1: | |
| 2025 if (src == T_LONG && (dest == T_INT || is_subword_type(dest))) { | |
| 2026 ek_opt = _adapter_opt_l2i; | |
| 2027 vminfo = adapter_subword_vminfo(dest); | |
| 2028 } else if (src == T_DOUBLE && dest == T_FLOAT) { | |
| 2029 ek_opt = _adapter_opt_d2f; | |
| 2030 } else { | |
| 2031 assert(false, ""); | |
| 2032 } | |
| 2033 break; | |
| 2034 case 1 *4+ 2: | |
| 2035 if (src == T_INT && dest == T_LONG) { | |
| 2036 ek_opt = _adapter_opt_i2l; | |
| 2037 } else if (src == T_FLOAT && dest == T_DOUBLE) { | |
| 2038 ek_opt = _adapter_opt_f2d; | |
| 2039 } else { | |
| 2040 assert(false, ""); | |
| 2041 } | |
| 2042 break; | |
| 2043 default: | |
| 2044 assert(false, ""); | |
| 2045 break; | |
| 2046 } | |
| 2047 } | |
| 2048 break; | |
| 2049 | |
| 2050 case _adapter_ref_to_prim: | |
| 2051 { | |
| 2052 switch (type2size[dest]) { | |
| 2053 case 1: | |
| 2054 ek_opt = _adapter_opt_unboxi; | |
| 2055 vminfo = adapter_subword_vminfo(dest); | |
| 2056 break; | |
| 2057 case 2: | |
| 2058 ek_opt = _adapter_opt_unboxl; | |
| 2059 break; | |
| 2060 default: | |
| 2061 assert(false, ""); | |
| 2062 break; | |
| 2063 } | |
| 2064 } | |
| 2065 break; | |
| 2066 | |
| 2067 case _adapter_prim_to_ref: | |
| 2068 goto throw_not_impl; // allocates, hence could block | |
| 2069 | |
| 2070 case _adapter_swap_args: | |
| 2071 case _adapter_rot_args: | |
| 2072 { | |
| 2073 int swap_slots = type2size[src]; | |
|
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2074 int slot_limit = sun_dyn_AdapterMethodHandle::vmslots(mh()); |
| 710 | 2075 int src_slot = argslot; |
| 2076 int dest_slot = vminfo; | |
| 2077 int rotate = (ek_orig == _adapter_swap_args) ? 0 : (src_slot > dest_slot) ? 1 : -1; | |
| 2078 switch (swap_slots) { | |
| 2079 case 1: | |
| 2080 ek_opt = (!rotate ? _adapter_opt_swap_1 : | |
| 2081 rotate > 0 ? _adapter_opt_rot_1_up : _adapter_opt_rot_1_down); | |
| 2082 break; | |
| 2083 case 2: | |
| 2084 ek_opt = (!rotate ? _adapter_opt_swap_2 : | |
| 2085 rotate > 0 ? _adapter_opt_rot_2_up : _adapter_opt_rot_2_down); | |
| 2086 break; | |
| 2087 default: | |
| 2088 assert(false, ""); | |
| 2089 break; | |
| 2090 } | |
| 2091 } | |
| 2092 break; | |
| 2093 | |
| 2094 case _adapter_collect_args: | |
| 2095 goto throw_not_impl; // allocates, hence could block | |
| 2096 | |
| 2097 case _adapter_spread_args: | |
| 2098 { | |
| 2099 // vminfo will be the required length of the array | |
| 2100 int slots_pushed = stack_move / stack_move_unit(); | |
| 2101 int array_size = slots_pushed + 1; | |
| 2102 assert(array_size >= 0, ""); | |
| 2103 vminfo = array_size; | |
| 2104 switch (array_size) { | |
| 2105 case 0: ek_opt = _adapter_opt_spread_0; break; | |
| 2106 case 1: ek_opt = _adapter_opt_spread_1; break; | |
| 2107 default: ek_opt = _adapter_opt_spread_more; break; | |
| 2108 } | |
| 2109 if ((vminfo & CONV_VMINFO_MASK) != vminfo) | |
| 2110 goto throw_not_impl; // overflow | |
| 2111 } | |
| 2112 break; | |
| 2113 | |
| 2114 case _adapter_flyby: | |
| 2115 case _adapter_ricochet: | |
| 2116 goto throw_not_impl; // runs Java code, hence could block | |
| 2117 | |
| 2118 default: | |
| 2119 // should have failed much earlier; must be a missing case here | |
| 2120 assert(false, "incomplete switch"); | |
| 2121 // and fall through: | |
| 2122 | |
| 2123 throw_not_impl: | |
| 2124 // FIXME: these adapters are NYI | |
| 2125 err = "adapter not yet implemented in the JVM"; | |
| 2126 break; | |
| 2127 } | |
| 2128 | |
| 2129 if (err != NULL) { | |
| 2130 throw_InternalError_for_bad_conversion(conversion, err, THREAD); | |
| 2131 return; | |
| 2132 } | |
| 2133 | |
| 2134 // Rebuild the conversion value; maybe parts of it were changed. | |
| 2135 jint new_conversion = adapter_conversion(conv_op, src, dest, stack_move, vminfo); | |
| 2136 | |
| 2137 // Finalize the conversion field. (Note that it is final to Java code.) | |
| 2138 sun_dyn_AdapterMethodHandle::set_conversion(mh(), new_conversion); | |
| 2139 | |
| 2140 // Done! | |
| 2141 java_dyn_MethodHandle::set_vmentry(mh(), entry(ek_opt)); | |
| 2142 | |
| 2143 // There should be enough memory barriers on exit from native methods | |
| 2144 // to ensure that the MH is fully initialized to all threads before | |
| 2145 // Java code can publish it in global data structures. | |
| 2146 } | |
| 2147 | |
| 2148 // | |
| 2149 // Here are the native methods on sun.dyn.MethodHandleImpl. | |
| 2150 // They are the private interface between this JVM and the HotSpot-specific | |
| 2151 // Java code that implements JSR 292 method handles. | |
| 2152 // | |
| 2153 // Note: We use a JVM_ENTRY macro to define each of these, for this is the way | |
| 2154 // that intrinsic (non-JNI) native methods are defined in HotSpot. | |
| 2155 // | |
| 2156 | |
| 2157 // direct method handles for invokestatic or invokespecial | |
| 2158 // void init(DirectMethodHandle self, MemberName ref, boolean doDispatch, Class<?> caller); | |
| 2159 JVM_ENTRY(void, MHI_init_DMH(JNIEnv *env, jobject igcls, jobject mh_jh, | |
| 2160 jobject target_jh, jboolean do_dispatch, jobject caller_jh)) { | |
| 2161 ResourceMark rm; // for error messages | |
| 2162 | |
| 2163 // This is the guy we are initializing: | |
| 2164 if (mh_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); } | |
| 2165 Handle mh(THREAD, JNIHandles::resolve_non_null(mh_jh)); | |
| 2166 | |
| 2167 // Early returns out of this method leave the DMH in an unfinished state. | |
| 2168 assert(java_dyn_MethodHandle::vmentry(mh()) == NULL, "must be safely null"); | |
| 2169 | |
| 2170 // which method are we really talking about? | |
| 2171 if (target_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); } | |
| 2172 oop target_oop = JNIHandles::resolve_non_null(target_jh); | |
| 2173 if (sun_dyn_MemberName::is_instance(target_oop) && | |
| 2174 sun_dyn_MemberName::vmindex(target_oop) == VM_INDEX_UNINITIALIZED) { | |
| 2175 Handle mname(THREAD, target_oop); | |
| 2176 MethodHandles::resolve_MemberName(mname, CHECK); | |
| 2177 target_oop = mname(); // in case of GC | |
| 2178 } | |
| 2179 | |
| 2180 int decode_flags = 0; klassOop receiver_limit = NULL; | |
| 2181 methodHandle m(THREAD, | |
| 2182 MethodHandles::decode_method(target_oop, | |
| 2183 receiver_limit, decode_flags)); | |
| 2184 if (m.is_null()) { THROW_MSG(vmSymbols::java_lang_InternalError(), "no such method"); } | |
| 2185 | |
| 2186 // The trusted Java code that calls this method should already have performed | |
| 2187 // access checks on behalf of the given caller. But, we can verify this. | |
| 2188 if (VerifyMethodHandles && caller_jh != NULL) { | |
| 2189 KlassHandle caller(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(caller_jh))); | |
| 2190 // If this were a bytecode, the first access check would be against | |
| 2191 // the "reference class" mentioned in the CONSTANT_Methodref. | |
|
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2192 // We don't know at this point which class that was, and if we |
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2193 // check against m.method_holder we might get the wrong answer. |
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2194 // So we just make sure to handle this check when the resolution |
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2195 // happens, when we call resolve_MemberName. |
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2196 // |
|
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2197 // (A public class can inherit public members from private supers, |
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2198 // and it would be wrong to check access against the private super |
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2199 // if the original symbolic reference was against the public class.) |
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2200 // |
| 710 | 2201 // If there were a bytecode, the next step would be to lookup the method |
| 2202 // in the reference class, then then check the method's access bits. | |
| 2203 // Emulate LinkResolver::check_method_accessability. | |
| 2204 klassOop resolved_klass = m->method_holder(); | |
| 2205 if (!Reflection::verify_field_access(caller->as_klassOop(), | |
|
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2206 resolved_klass, resolved_klass, |
| 710 | 2207 m->access_flags(), |
| 2208 true)) { | |
| 2209 // %%% following cutout belongs in Reflection::verify_field_access? | |
| 2210 bool same_pm = Reflection::is_same_package_member(caller->as_klassOop(), | |
|
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2211 resolved_klass, THREAD); |
| 710 | 2212 if (!same_pm) { |
| 2213 THROW_MSG(vmSymbols::java_lang_InternalError(), m->name_and_sig_as_C_string()); | |
| 2214 } | |
| 2215 } | |
| 2216 } | |
| 2217 | |
| 2218 MethodHandles::init_DirectMethodHandle(mh, m, (do_dispatch != JNI_FALSE), CHECK); | |
| 2219 } | |
| 2220 JVM_END | |
| 2221 | |
| 2222 // bound method handles | |
| 2223 JVM_ENTRY(void, MHI_init_BMH(JNIEnv *env, jobject igcls, jobject mh_jh, | |
| 2224 jobject target_jh, int argnum)) { | |
| 2225 ResourceMark rm; // for error messages | |
| 2226 | |
| 2227 // This is the guy we are initializing: | |
| 2228 if (mh_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); } | |
| 2229 Handle mh(THREAD, JNIHandles::resolve_non_null(mh_jh)); | |
| 2230 | |
| 2231 // Early returns out of this method leave the BMH in an unfinished state. | |
| 2232 assert(java_dyn_MethodHandle::vmentry(mh()) == NULL, "must be safely null"); | |
| 2233 | |
| 2234 if (target_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); } | |
| 2235 Handle target(THREAD, JNIHandles::resolve_non_null(target_jh)); | |
| 2236 | |
| 2237 if (!java_dyn_MethodHandle::is_instance(target())) { | |
| 2238 // Target object is a reflective method. (%%% Do we need this alternate path?) | |
| 2239 Untested("init_BMH of non-MH"); | |
| 2240 if (argnum != 0) { THROW(vmSymbols::java_lang_InternalError()); } | |
| 2241 int decode_flags = 0; klassOop receiver_limit_oop = NULL; | |
| 2242 methodHandle m(THREAD, | |
| 2243 MethodHandles::decode_method(target(), | |
| 2244 receiver_limit_oop, | |
| 2245 decode_flags)); | |
| 2246 KlassHandle receiver_limit(THREAD, receiver_limit_oop); | |
| 2247 MethodHandles::init_BoundMethodHandle_with_receiver(mh, m, | |
| 2248 receiver_limit, | |
| 2249 decode_flags, | |
| 2250 CHECK); | |
| 2251 return; | |
| 2252 } | |
| 2253 | |
| 2254 // Build a BMH on top of a DMH or another BMH: | |
| 2255 MethodHandles::init_BoundMethodHandle(mh, target, argnum, CHECK); | |
| 2256 } | |
| 2257 JVM_END | |
| 2258 | |
| 2259 // adapter method handles | |
| 2260 JVM_ENTRY(void, MHI_init_AMH(JNIEnv *env, jobject igcls, jobject mh_jh, | |
| 2261 jobject target_jh, int argnum)) { | |
| 2262 // This is the guy we are initializing: | |
| 2263 if (mh_jh == NULL || target_jh == NULL) { | |
| 2264 THROW(vmSymbols::java_lang_InternalError()); | |
| 2265 } | |
| 2266 Handle mh(THREAD, JNIHandles::resolve_non_null(mh_jh)); | |
| 2267 Handle target(THREAD, JNIHandles::resolve_non_null(target_jh)); | |
| 2268 | |
| 2269 // Early returns out of this method leave the AMH in an unfinished state. | |
| 2270 assert(java_dyn_MethodHandle::vmentry(mh()) == NULL, "must be safely null"); | |
| 2271 | |
| 2272 MethodHandles::init_AdapterMethodHandle(mh, target, argnum, CHECK); | |
| 2273 } | |
| 2274 JVM_END | |
| 2275 | |
| 2276 // method type forms | |
| 2277 JVM_ENTRY(void, MHI_init_MT(JNIEnv *env, jobject igcls, jobject erased_jh)) { | |
| 2278 if (erased_jh == NULL) return; | |
| 2279 if (TraceMethodHandles) { | |
| 2280 tty->print("creating MethodType form "); | |
| 2281 if (WizardMode || Verbose) { // Warning: this calls Java code on the MH! | |
| 2282 // call Object.toString() | |
| 2283 symbolOop name = vmSymbols::toString_name(), sig = vmSymbols::void_string_signature(); | |
| 2284 JavaCallArguments args(Handle(THREAD, JNIHandles::resolve_non_null(erased_jh))); | |
| 2285 JavaValue result(T_OBJECT); | |
| 1142 | 2286 JavaCalls::call_virtual(&result, SystemDictionary::Object_klass(), name, sig, |
| 710 | 2287 &args, CHECK); |
| 2288 Handle str(THREAD, (oop)result.get_jobject()); | |
| 2289 java_lang_String::print(str, tty); | |
| 2290 } | |
| 2291 tty->cr(); | |
| 2292 } | |
| 2293 } | |
| 2294 JVM_END | |
| 2295 | |
| 2296 // debugging and reflection | |
| 2297 JVM_ENTRY(jobject, MHI_getTarget(JNIEnv *env, jobject igcls, jobject mh_jh, jint format)) { | |
| 2298 Handle mh(THREAD, JNIHandles::resolve(mh_jh)); | |
| 2299 if (!java_dyn_MethodHandle::is_instance(mh())) { | |
| 2300 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException()); | |
| 2301 } | |
| 2302 oop target = MethodHandles::encode_target(mh, format, CHECK_NULL); | |
| 2303 return JNIHandles::make_local(THREAD, target); | |
| 2304 } | |
| 2305 JVM_END | |
| 2306 | |
| 2307 JVM_ENTRY(jint, MHI_getConstant(JNIEnv *env, jobject igcls, jint which)) { | |
| 2308 switch (which) { | |
| 2309 case MethodHandles::GC_JVM_PUSH_LIMIT: | |
| 2310 guarantee(MethodHandlePushLimit >= 2 && MethodHandlePushLimit <= 0xFF, | |
| 2311 "MethodHandlePushLimit parameter must be in valid range"); | |
| 2312 return MethodHandlePushLimit; | |
|
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2313 case MethodHandles::GC_JVM_STACK_MOVE_UNIT: |
| 710 | 2314 // return number of words per slot, signed according to stack direction |
| 2315 return MethodHandles::stack_move_unit(); | |
|
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2316 case MethodHandles::GC_CONV_OP_IMPLEMENTED_MASK: |
|
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2317 return MethodHandles::adapter_conversion_ops_supported_mask(); |
| 710 | 2318 } |
| 2319 return 0; | |
| 2320 } | |
| 2321 JVM_END | |
| 2322 | |
| 2323 #ifndef PRODUCT | |
| 2324 #define EACH_NAMED_CON(template) \ | |
| 2325 template(MethodHandles,GC_JVM_PUSH_LIMIT) \ | |
|
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2326 template(MethodHandles,GC_JVM_STACK_MOVE_UNIT) \ |
| 710 | 2327 template(MethodHandles,ETF_HANDLE_OR_METHOD_NAME) \ |
| 2328 template(MethodHandles,ETF_DIRECT_HANDLE) \ | |
| 2329 template(MethodHandles,ETF_METHOD_NAME) \ | |
| 2330 template(MethodHandles,ETF_REFLECT_METHOD) \ | |
| 2331 template(sun_dyn_MemberName,MN_IS_METHOD) \ | |
| 2332 template(sun_dyn_MemberName,MN_IS_CONSTRUCTOR) \ | |
| 2333 template(sun_dyn_MemberName,MN_IS_FIELD) \ | |
| 2334 template(sun_dyn_MemberName,MN_IS_TYPE) \ | |
| 2335 template(sun_dyn_MemberName,MN_SEARCH_SUPERCLASSES) \ | |
| 2336 template(sun_dyn_MemberName,MN_SEARCH_INTERFACES) \ | |
| 2337 template(sun_dyn_MemberName,VM_INDEX_UNINITIALIZED) \ | |
| 2338 template(sun_dyn_AdapterMethodHandle,OP_RETYPE_ONLY) \ | |
|
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2339 template(sun_dyn_AdapterMethodHandle,OP_RETYPE_RAW) \ |
| 710 | 2340 template(sun_dyn_AdapterMethodHandle,OP_CHECK_CAST) \ |
| 2341 template(sun_dyn_AdapterMethodHandle,OP_PRIM_TO_PRIM) \ | |
| 2342 template(sun_dyn_AdapterMethodHandle,OP_REF_TO_PRIM) \ | |
| 2343 template(sun_dyn_AdapterMethodHandle,OP_PRIM_TO_REF) \ | |
| 2344 template(sun_dyn_AdapterMethodHandle,OP_SWAP_ARGS) \ | |
| 2345 template(sun_dyn_AdapterMethodHandle,OP_ROT_ARGS) \ | |
| 2346 template(sun_dyn_AdapterMethodHandle,OP_DUP_ARGS) \ | |
| 2347 template(sun_dyn_AdapterMethodHandle,OP_DROP_ARGS) \ | |
| 2348 template(sun_dyn_AdapterMethodHandle,OP_COLLECT_ARGS) \ | |
| 2349 template(sun_dyn_AdapterMethodHandle,OP_SPREAD_ARGS) \ | |
| 2350 template(sun_dyn_AdapterMethodHandle,OP_FLYBY) \ | |
| 2351 template(sun_dyn_AdapterMethodHandle,OP_RICOCHET) \ | |
| 2352 template(sun_dyn_AdapterMethodHandle,CONV_OP_LIMIT) \ | |
| 2353 template(sun_dyn_AdapterMethodHandle,CONV_OP_MASK) \ | |
| 2354 template(sun_dyn_AdapterMethodHandle,CONV_VMINFO_MASK) \ | |
| 2355 template(sun_dyn_AdapterMethodHandle,CONV_VMINFO_SHIFT) \ | |
| 2356 template(sun_dyn_AdapterMethodHandle,CONV_OP_SHIFT) \ | |
| 2357 template(sun_dyn_AdapterMethodHandle,CONV_DEST_TYPE_SHIFT) \ | |
| 2358 template(sun_dyn_AdapterMethodHandle,CONV_SRC_TYPE_SHIFT) \ | |
| 2359 template(sun_dyn_AdapterMethodHandle,CONV_STACK_MOVE_SHIFT) \ | |
| 2360 template(sun_dyn_AdapterMethodHandle,CONV_STACK_MOVE_MASK) \ | |
| 2361 /*end*/ | |
| 2362 | |
| 2363 #define ONE_PLUS(scope,value) 1+ | |
| 2364 static const int con_value_count = EACH_NAMED_CON(ONE_PLUS) 0; | |
| 2365 #define VALUE_COMMA(scope,value) scope::value, | |
| 2366 static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA) 0 }; | |
| 2367 #define STRING_NULL(scope,value) #value "\0" | |
| 2368 static const char con_names[] = { EACH_NAMED_CON(STRING_NULL) }; | |
| 2369 | |
| 2370 #undef ONE_PLUS | |
| 2371 #undef VALUE_COMMA | |
| 2372 #undef STRING_NULL | |
| 2373 #undef EACH_NAMED_CON | |
| 2374 #endif | |
| 2375 | |
| 2376 JVM_ENTRY(jint, MHI_getNamedCon(JNIEnv *env, jobject igcls, jint which, jobjectArray box_jh)) { | |
| 2377 #ifndef PRODUCT | |
| 2378 if (which >= 0 && which < con_value_count) { | |
| 2379 int con = con_values[which]; | |
| 2380 objArrayOop box = (objArrayOop) JNIHandles::resolve(box_jh); | |
| 2381 if (box != NULL && box->klass() == Universe::objectArrayKlassObj() && box->length() > 0) { | |
| 2382 const char* str = &con_names[0]; | |
| 2383 for (int i = 0; i < which; i++) | |
| 2384 str += strlen(str) + 1; // skip name and null | |
| 2385 oop name = java_lang_String::create_oop_from_str(str, CHECK_0); | |
| 2386 box->obj_at_put(0, name); | |
| 2387 } | |
| 2388 return con; | |
| 2389 } | |
| 2390 #endif | |
| 2391 return 0; | |
| 2392 } | |
| 2393 JVM_END | |
| 2394 | |
| 2395 // void init(MemberName self, AccessibleObject ref) | |
| 2396 JVM_ENTRY(void, MHI_init_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jobject target_jh)) { | |
| 2397 if (mname_jh == NULL || target_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); } | |
| 2398 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); | |
| 2399 oop target_oop = JNIHandles::resolve_non_null(target_jh); | |
| 2400 MethodHandles::init_MemberName(mname(), target_oop); | |
| 2401 } | |
| 2402 JVM_END | |
| 2403 | |
| 2404 // void expand(MemberName self) | |
| 2405 JVM_ENTRY(void, MHI_expand_Mem(JNIEnv *env, jobject igcls, jobject mname_jh)) { | |
| 2406 if (mname_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); } | |
| 2407 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); | |
| 2408 MethodHandles::expand_MemberName(mname, 0, CHECK); | |
| 2409 } | |
| 2410 JVM_END | |
| 2411 | |
| 2412 // void resolve(MemberName self, Class<?> caller) | |
| 2413 JVM_ENTRY(void, MHI_resolve_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jclass caller_jh)) { | |
| 2414 if (mname_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); } | |
| 2415 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); | |
|
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2416 |
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2417 // The trusted Java code that calls this method should already have performed |
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2418 // access checks on behalf of the given caller. But, we can verify this. |
|
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2419 if (VerifyMethodHandles && caller_jh != NULL) { |
|
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2420 klassOop reference_klass = java_lang_Class::as_klassOop(sun_dyn_MemberName::clazz(mname())); |
|
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2421 if (reference_klass != NULL) { |
|
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2422 // Emulate LinkResolver::check_klass_accessability. |
|
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2423 klassOop caller = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(caller_jh)); |
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|
2424 if (!Reflection::verify_class_access(caller, |
|
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|
2425 reference_klass, |
|
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|
2426 true)) { |
|
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|
2427 THROW_MSG(vmSymbols::java_lang_InternalError(), Klass::cast(reference_klass)->external_name()); |
|
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|
2428 } |
|
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|
2429 } |
|
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|
2430 } |
|
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|
2431 |
| 710 | 2432 MethodHandles::resolve_MemberName(mname, CHECK); |
| 2433 } | |
| 2434 JVM_END | |
| 2435 | |
| 2436 // static native int getMembers(Class<?> defc, String matchName, String matchSig, | |
| 2437 // int matchFlags, Class<?> caller, int skip, MemberName[] results); | |
| 2438 JVM_ENTRY(jint, MHI_getMembers(JNIEnv *env, jobject igcls, | |
| 2439 jclass clazz_jh, jstring name_jh, jstring sig_jh, | |
| 2440 int mflags, jclass caller_jh, jint skip, jobjectArray results_jh)) { | |
| 2441 if (clazz_jh == NULL || results_jh == NULL) return -1; | |
| 2442 klassOop k_oop = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz_jh)); | |
| 2443 | |
| 2444 objArrayOop results = (objArrayOop) JNIHandles::resolve(results_jh); | |
| 2445 if (results == NULL || !results->is_objArray()) return -1; | |
| 2446 | |
| 2447 symbolOop name = NULL, sig = NULL; | |
| 2448 if (name_jh != NULL) { | |
| 2449 name = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(name_jh)); | |
| 2450 if (name == NULL) return 0; // a match is not possible | |
| 2451 } | |
| 2452 if (sig_jh != NULL) { | |
| 2453 sig = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(sig_jh)); | |
| 2454 if (sig == NULL) return 0; // a match is not possible | |
| 2455 } | |
| 2456 | |
| 2457 klassOop caller = NULL; | |
| 2458 if (caller_jh != NULL) { | |
| 2459 oop caller_oop = JNIHandles::resolve_non_null(caller_jh); | |
| 2460 if (!java_lang_Class::is_instance(caller_oop)) return -1; | |
| 2461 caller = java_lang_Class::as_klassOop(caller_oop); | |
| 2462 } | |
| 2463 | |
| 2464 if (name != NULL && sig != NULL && results != NULL) { | |
| 2465 // try a direct resolve | |
| 2466 // %%% TO DO | |
| 2467 } | |
| 2468 | |
| 2469 int res = MethodHandles::find_MemberNames(k_oop, name, sig, mflags, | |
| 2470 caller, skip, results); | |
| 2471 // TO DO: expand at least some of the MemberNames, to avoid massive callbacks | |
| 2472 return res; | |
| 2473 } | |
| 2474 JVM_END | |
| 2475 | |
|
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2476 JVM_ENTRY(void, MHI_registerBootstrap(JNIEnv *env, jobject igcls, jclass caller_jh, jobject bsm_jh)) { |
|
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|
2477 instanceKlassHandle ik = MethodHandles::resolve_instance_klass(caller_jh, THREAD); |
|
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|
2478 ik->link_class(CHECK); |
|
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|
2479 if (!java_dyn_MethodHandle::is_instance(JNIHandles::resolve(bsm_jh))) { |
|
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|
2480 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "method handle"); |
|
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|
2481 } |
|
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|
2482 const char* err = NULL; |
|
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|
2483 if (ik->is_initialized() || ik->is_in_error_state()) { |
|
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|
2484 err = "too late: class is already initialized"; |
|
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|
2485 } else { |
|
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|
2486 ObjectLocker ol(ik, THREAD); // note: this should be a recursive lock |
|
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|
2487 if (ik->is_not_initialized() || |
|
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|
2488 (ik->is_being_initialized() && ik->is_reentrant_initialization(THREAD))) { |
|
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|
2489 if (ik->bootstrap_method() != NULL) { |
|
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|
2490 err = "class is already equipped with a bootstrap method"; |
|
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|
2491 } else { |
|
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|
2492 ik->set_bootstrap_method(JNIHandles::resolve_non_null(bsm_jh)); |
|
cd5dbf694d45
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|
2493 err = NULL; |
|
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|
2494 } |
|
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|
2495 } else { |
|
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|
2496 err = "class is already initialized"; |
|
cd5dbf694d45
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|
2497 if (ik->is_being_initialized()) |
|
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diff
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|
2498 err = "class is already being initialized in a different thread"; |
|
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|
2499 } |
|
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|
2500 } |
|
cd5dbf694d45
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|
2501 if (err != NULL) { |
|
cd5dbf694d45
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diff
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|
2502 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), err); |
|
cd5dbf694d45
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|
2503 } |
|
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diff
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|
2504 } |
|
cd5dbf694d45
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|
2505 JVM_END |
| 710 | 2506 |
|
1507
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|
2507 JVM_ENTRY(jobject, MHI_getBootstrap(JNIEnv *env, jobject igcls, jclass caller_jh)) { |
|
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|
2508 instanceKlassHandle ik = MethodHandles::resolve_instance_klass(caller_jh, THREAD); |
|
cd5dbf694d45
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|
2509 return JNIHandles::make_local(THREAD, ik->bootstrap_method()); |
|
cd5dbf694d45
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diff
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|
2510 } |
|
cd5dbf694d45
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diff
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|
2511 JVM_END |
|
cd5dbf694d45
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diff
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|
2512 |
|
cd5dbf694d45
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diff
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|
2513 JVM_ENTRY(void, MHI_setCallSiteTarget(JNIEnv *env, jobject igcls, jobject site_jh, jobject target_jh)) { |
|
726
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6655646: dynamic languages need dynamically linked call sites
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diff
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|
2514 // No special action required, yet. |
|
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|
2515 oop site_oop = JNIHandles::resolve(site_jh); |
|
1507
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|
2516 if (!java_dyn_CallSite::is_instance(site_oop)) |
|
cd5dbf694d45
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diff
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|
2517 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "not a CallSite"); |
|
1059
389049f3f393
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diff
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|
2518 java_dyn_CallSite::set_target(site_oop, JNIHandles::resolve(target_jh)); |
|
726
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diff
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|
2519 } |
|
be93aad57795
6655646: dynamic languages need dynamically linked call sites
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|
2520 JVM_END |
|
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|
2521 |
|
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|
2522 |
| 710 | 2523 /// JVM_RegisterMethodHandleMethods |
| 2524 | |
| 2525 #define ADR "J" | |
| 2526 | |
| 2527 #define LANG "Ljava/lang/" | |
| 2528 #define JDYN "Ljava/dyn/" | |
| 2529 #define IDYN "Lsun/dyn/" | |
| 2530 | |
| 2531 #define OBJ LANG"Object;" | |
| 2532 #define CLS LANG"Class;" | |
| 2533 #define STRG LANG"String;" | |
|
1059
389049f3f393
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|
2534 #define CST JDYN"CallSite;" |
| 710 | 2535 #define MT JDYN"MethodType;" |
| 2536 #define MH JDYN"MethodHandle;" | |
| 2537 #define MHI IDYN"MethodHandleImpl;" | |
| 2538 #define MEM IDYN"MemberName;" | |
| 2539 #define AMH IDYN"AdapterMethodHandle;" | |
| 2540 #define BMH IDYN"BoundMethodHandle;" | |
| 2541 #define DMH IDYN"DirectMethodHandle;" | |
| 2542 | |
| 2543 #define CC (char*) /*cast a literal from (const char*)*/ | |
| 2544 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
| 2545 | |
| 2546 // These are the native methods on sun.dyn.MethodHandleNatives. | |
| 2547 static JNINativeMethod methods[] = { | |
| 2548 // void init(MemberName self, AccessibleObject ref) | |
| 2549 {CC"init", CC"("AMH""MH"I)V", FN_PTR(MHI_init_AMH)}, | |
| 2550 {CC"init", CC"("BMH""OBJ"I)V", FN_PTR(MHI_init_BMH)}, | |
| 2551 {CC"init", CC"("DMH""OBJ"Z"CLS")V", FN_PTR(MHI_init_DMH)}, | |
| 2552 {CC"init", CC"("MT")V", FN_PTR(MHI_init_MT)}, | |
| 2553 {CC"init", CC"("MEM""OBJ")V", FN_PTR(MHI_init_Mem)}, | |
| 2554 {CC"expand", CC"("MEM")V", FN_PTR(MHI_expand_Mem)}, | |
| 2555 {CC"resolve", CC"("MEM""CLS")V", FN_PTR(MHI_resolve_Mem)}, | |
| 2556 {CC"getTarget", CC"("MH"I)"OBJ, FN_PTR(MHI_getTarget)}, | |
| 2557 {CC"getConstant", CC"(I)I", FN_PTR(MHI_getConstant)}, | |
| 2558 // static native int getNamedCon(int which, Object[] name) | |
| 2559 {CC"getNamedCon", CC"(I["OBJ")I", FN_PTR(MHI_getNamedCon)}, | |
| 2560 // static native int getMembers(Class<?> defc, String matchName, String matchSig, | |
| 2561 // int matchFlags, Class<?> caller, int skip, MemberName[] results); | |
| 2562 {CC"getMembers", CC"("CLS""STRG""STRG"I"CLS"I["MEM")I", FN_PTR(MHI_getMembers)} | |
| 2563 }; | |
| 2564 | |
|
726
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diff
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|
2565 // More entry points specifically for EnableInvokeDynamic. |
|
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diff
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|
2566 static JNINativeMethod methods2[] = { |
|
1507
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diff
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|
2567 {CC"registerBootstrap", CC"("CLS MH")V", FN_PTR(MHI_registerBootstrap)}, |
|
cd5dbf694d45
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diff
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|
2568 {CC"getBootstrap", CC"("CLS")"MH, FN_PTR(MHI_getBootstrap)}, |
|
cd5dbf694d45
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diff
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|
2569 {CC"setCallSiteTarget", CC"("CST MH")V", FN_PTR(MHI_setCallSiteTarget)} |
|
726
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|
2570 }; |
|
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diff
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|
2571 |
| 710 | 2572 |
| 2573 // This one function is exported, used by NativeLookup. | |
| 2574 | |
| 2575 JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) { | |
| 2576 assert(MethodHandles::spot_check_entry_names(), "entry enum is OK"); | |
| 2577 | |
|
726
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|
2578 // note: this explicit warning-producing stuff will be replaced by auto-detection of the JSR 292 classes |
|
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|
2579 |
| 710 | 2580 if (!EnableMethodHandles) { |
|
1039
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|
2581 warning("JSR 292 method handles are disabled in this JVM. Use -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles to enable."); |
| 710 | 2582 return; // bind nothing |
| 2583 } | |
| 2584 | |
|
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|
2585 bool enable_MH = true; |
|
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|
2586 |
| 710 | 2587 { |
| 2588 ThreadToNativeFromVM ttnfv(thread); | |
| 2589 | |
| 2590 int status = env->RegisterNatives(MHN_class, methods, sizeof(methods)/sizeof(JNINativeMethod)); | |
| 2591 if (env->ExceptionOccurred()) { | |
| 2592 MethodHandles::set_enabled(false); | |
| 2593 warning("JSR 292 method handle code is mismatched to this JVM. Disabling support."); | |
|
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|
2594 enable_MH = false; |
| 710 | 2595 env->ExceptionClear(); |
| 2596 } | |
| 2597 } | |
|
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|
2598 |
|
1039
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|
2599 if (enable_MH) { |
|
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|
2600 KlassHandle MHI_klass = SystemDictionaryHandles::MethodHandleImpl_klass(); |
|
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|
2601 if (MHI_klass.not_null()) { |
|
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|
2602 symbolHandle raiseException_name = oopFactory::new_symbol_handle("raiseException", CHECK); |
|
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|
2603 symbolHandle raiseException_sig = oopFactory::new_symbol_handle("(ILjava/lang/Object;Ljava/lang/Object;)V", CHECK); |
|
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|
2604 methodOop raiseException_method = instanceKlass::cast(MHI_klass->as_klassOop()) |
|
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|
2605 ->find_method(raiseException_name(), raiseException_sig()); |
|
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|
2606 if (raiseException_method != NULL && raiseException_method->is_static()) { |
|
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|
2607 MethodHandles::set_raise_exception_method(raiseException_method); |
|
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|
2608 } else { |
|
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|
2609 warning("JSR 292 method handle code is mismatched to this JVM. Disabling support."); |
|
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|
2610 enable_MH = false; |
|
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|
2611 } |
|
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|
2612 } |
|
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|
2613 } |
|
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|
2614 |
|
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|
2615 if (enable_MH) { |
|
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|
2616 MethodHandles::set_enabled(true); |
|
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|
2617 } |
|
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|
2618 |
|
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|
2619 if (!EnableInvokeDynamic) { |
|
1039
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|
2620 warning("JSR 292 invokedynamic is disabled in this JVM. Use -XX:+UnlockExperimentalVMOptions -XX:+EnableInvokeDynamic to enable."); |
|
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|
2621 return; // bind nothing |
|
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|
2622 } |
|
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|
2623 |
|
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2624 { |
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2625 ThreadToNativeFromVM ttnfv(thread); |
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2626 |
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2627 int status = env->RegisterNatives(MHN_class, methods2, sizeof(methods2)/sizeof(JNINativeMethod)); |
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2628 if (env->ExceptionOccurred()) { |
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2629 MethodHandles::set_enabled(false); |
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2630 warning("JSR 292 method handle code is mismatched to this JVM. Disabling support."); |
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2631 env->ExceptionClear(); |
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2632 } else { |
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2633 MethodHandles::set_enabled(true); |
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2634 } |
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2635 } |
| 710 | 2636 } |
| 2637 JVM_END |