Fri, 13 Sep 2013 22:38:02 -0400
8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation
Summary: Enhance method resolution and resulting data structures, plus some refactoring.
Reviewed-by: twisti, acorn, jrose
jrose@1145 | 1 | /* |
sspitsyn@5178 | 2 | * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved. |
jrose@1145 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
jrose@1145 | 4 | * |
jrose@1145 | 5 | * This code is free software; you can redistribute it and/or modify it |
jrose@1145 | 6 | * under the terms of the GNU General Public License version 2 only, as |
jrose@1145 | 7 | * published by the Free Software Foundation. |
jrose@1145 | 8 | * |
jrose@1145 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
jrose@1145 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
jrose@1145 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
jrose@1145 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
jrose@1145 | 13 | * accompanied this code). |
jrose@1145 | 14 | * |
jrose@1145 | 15 | * You should have received a copy of the GNU General Public License version |
jrose@1145 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
jrose@1145 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
jrose@1145 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
jrose@1145 | 22 | * |
jrose@1145 | 23 | */ |
jrose@1145 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "classfile/symbolTable.hpp" |
jrose@2982 | 27 | #include "compiler/compileBroker.hpp" |
stefank@2314 | 28 | #include "interpreter/interpreter.hpp" |
never@2920 | 29 | #include "interpreter/oopMapCache.hpp" |
stefank@2314 | 30 | #include "memory/allocation.inline.hpp" |
stefank@2314 | 31 | #include "memory/oopFactory.hpp" |
sspitsyn@4965 | 32 | #include "prims/jvmtiRedefineClassesTrace.hpp" |
stefank@2314 | 33 | #include "prims/methodHandles.hpp" |
jrose@2982 | 34 | #include "runtime/compilationPolicy.hpp" |
stefank@2314 | 35 | #include "runtime/javaCalls.hpp" |
stefank@2314 | 36 | #include "runtime/reflection.hpp" |
stefank@2314 | 37 | #include "runtime/signature.hpp" |
stefank@2314 | 38 | #include "runtime/stubRoutines.hpp" |
stefank@2314 | 39 | |
twisti@3969 | 40 | |
jrose@1145 | 41 | /* |
jrose@1145 | 42 | * JSR 292 reference implementation: method handles |
twisti@3969 | 43 | * The JDK 7 reference implementation represented method handle |
twisti@3969 | 44 | * combinations as chains. Each link in the chain had a "vmentry" |
twisti@3969 | 45 | * field which pointed at a bit of assembly code which performed |
twisti@3969 | 46 | * one transformation before dispatching to the next link in the chain. |
twisti@3969 | 47 | * |
twisti@3969 | 48 | * The current reference implementation pushes almost all code generation |
twisti@3969 | 49 | * responsibility to (trusted) Java code. A method handle contains a |
twisti@3969 | 50 | * pointer to its "LambdaForm", which embodies all details of the method |
twisti@3969 | 51 | * handle's behavior. The LambdaForm is a normal Java object, managed |
twisti@3969 | 52 | * by a runtime coded in Java. |
jrose@1145 | 53 | */ |
jrose@1145 | 54 | |
jrose@1145 | 55 | bool MethodHandles::_enabled = false; // set true after successful native linkage |
never@2950 | 56 | MethodHandlesAdapterBlob* MethodHandles::_adapter_code = NULL; |
twisti@1734 | 57 | |
twisti@1734 | 58 | //------------------------------------------------------------------------------ |
twisti@1734 | 59 | // MethodHandles::generate_adapters |
twisti@1734 | 60 | // |
twisti@2436 | 61 | void MethodHandles::generate_adapters() { |
twisti@2698 | 62 | if (!EnableInvokeDynamic || SystemDictionary::MethodHandle_klass() == NULL) return; |
twisti@1734 | 63 | |
twisti@1734 | 64 | assert(_adapter_code == NULL, "generate only once"); |
twisti@1734 | 65 | |
twisti@1734 | 66 | ResourceMark rm; |
twisti@1734 | 67 | TraceTime timer("MethodHandles adapters generation", TraceStartupTime); |
never@2950 | 68 | _adapter_code = MethodHandlesAdapterBlob::create(adapter_code_size); |
twisti@1734 | 69 | if (_adapter_code == NULL) |
ccheung@4993 | 70 | vm_exit_out_of_memory(adapter_code_size, OOM_MALLOC_ERROR, |
ccheung@4993 | 71 | "CodeCache: no room for MethodHandles adapters"); |
never@3255 | 72 | { |
never@3255 | 73 | CodeBuffer code(_adapter_code); |
never@3255 | 74 | MethodHandlesAdapterGenerator g(&code); |
never@3255 | 75 | g.generate(); |
never@3255 | 76 | code.log_section_sizes("MethodHandlesAdapterBlob"); |
never@3255 | 77 | } |
twisti@1734 | 78 | } |
twisti@1734 | 79 | |
twisti@1734 | 80 | //------------------------------------------------------------------------------ |
twisti@1734 | 81 | // MethodHandlesAdapterGenerator::generate |
twisti@1734 | 82 | // |
twisti@2436 | 83 | void MethodHandlesAdapterGenerator::generate() { |
twisti@1734 | 84 | // Generate generic method handle adapters. |
twisti@3969 | 85 | // Generate interpreter entries |
twisti@3969 | 86 | for (Interpreter::MethodKind mk = Interpreter::method_handle_invoke_FIRST; |
twisti@3969 | 87 | mk <= Interpreter::method_handle_invoke_LAST; |
twisti@3969 | 88 | mk = Interpreter::MethodKind(1 + (int)mk)) { |
twisti@3969 | 89 | vmIntrinsics::ID iid = Interpreter::method_handle_intrinsic(mk); |
twisti@3969 | 90 | StubCodeMark mark(this, "MethodHandle::interpreter_entry", vmIntrinsics::name_at(iid)); |
twisti@3969 | 91 | address entry = MethodHandles::generate_method_handle_interpreter_entry(_masm, iid); |
twisti@3969 | 92 | if (entry != NULL) { |
twisti@3969 | 93 | Interpreter::set_entry_for_kind(mk, entry); |
never@2895 | 94 | } |
twisti@3969 | 95 | // If the entry is not set, it will throw AbstractMethodError. |
twisti@1734 | 96 | } |
twisti@1734 | 97 | } |
twisti@1734 | 98 | |
jrose@1145 | 99 | void MethodHandles::set_enabled(bool z) { |
jrose@1145 | 100 | if (_enabled != z) { |
twisti@2698 | 101 | guarantee(z && EnableInvokeDynamic, "can only enable once, and only if -XX:+EnableInvokeDynamic"); |
jrose@1145 | 102 | _enabled = z; |
jrose@1145 | 103 | } |
jrose@1145 | 104 | } |
jrose@1145 | 105 | |
jrose@1145 | 106 | // MemberName support |
jrose@1145 | 107 | |
jrose@2639 | 108 | // import java_lang_invoke_MemberName.* |
jrose@1145 | 109 | enum { |
twisti@4866 | 110 | IS_METHOD = java_lang_invoke_MemberName::MN_IS_METHOD, |
twisti@4866 | 111 | IS_CONSTRUCTOR = java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR, |
twisti@4866 | 112 | IS_FIELD = java_lang_invoke_MemberName::MN_IS_FIELD, |
twisti@4866 | 113 | IS_TYPE = java_lang_invoke_MemberName::MN_IS_TYPE, |
twisti@4866 | 114 | CALLER_SENSITIVE = java_lang_invoke_MemberName::MN_CALLER_SENSITIVE, |
twisti@3969 | 115 | REFERENCE_KIND_SHIFT = java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT, |
twisti@3969 | 116 | REFERENCE_KIND_MASK = java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK, |
twisti@4866 | 117 | SEARCH_SUPERCLASSES = java_lang_invoke_MemberName::MN_SEARCH_SUPERCLASSES, |
twisti@4866 | 118 | SEARCH_INTERFACES = java_lang_invoke_MemberName::MN_SEARCH_INTERFACES, |
twisti@3969 | 119 | ALL_KINDS = IS_METHOD | IS_CONSTRUCTOR | IS_FIELD | IS_TYPE |
jrose@1145 | 120 | }; |
jrose@1145 | 121 | |
jrose@1862 | 122 | Handle MethodHandles::new_MemberName(TRAPS) { |
jrose@1862 | 123 | Handle empty; |
jrose@1862 | 124 | instanceKlassHandle k(THREAD, SystemDictionary::MemberName_klass()); |
jrose@1862 | 125 | if (!k->is_initialized()) k->initialize(CHECK_(empty)); |
jrose@1862 | 126 | return Handle(THREAD, k->allocate_instance(THREAD)); |
jrose@1862 | 127 | } |
jrose@1862 | 128 | |
sspitsyn@4965 | 129 | oop MethodHandles::init_MemberName(Handle mname, Handle target) { |
drchase@5732 | 130 | // This method is used from java.lang.invoke.MemberName constructors. |
drchase@5732 | 131 | // It fills in the new MemberName from a java.lang.reflect.Member. |
sspitsyn@4965 | 132 | Thread* thread = Thread::current(); |
sspitsyn@4965 | 133 | oop target_oop = target(); |
coleenp@4037 | 134 | Klass* target_klass = target_oop->klass(); |
twisti@3969 | 135 | if (target_klass == SystemDictionary::reflect_Field_klass()) { |
jrose@1145 | 136 | oop clazz = java_lang_reflect_Field::clazz(target_oop); // fd.field_holder() |
jrose@1145 | 137 | int slot = java_lang_reflect_Field::slot(target_oop); // fd.index() |
sspitsyn@4965 | 138 | KlassHandle k(thread, java_lang_Class::as_Klass(clazz)); |
drchase@5732 | 139 | if (!k.is_null() && k->oop_is_instance()) { |
drchase@5732 | 140 | fieldDescriptor fd(InstanceKlass::cast(k()), slot); |
drchase@5732 | 141 | oop mname2 = init_field_MemberName(mname, fd); |
drchase@5732 | 142 | if (mname2 != NULL) { |
drchase@5732 | 143 | // Since we have the reified name and type handy, add them to the result. |
drchase@5732 | 144 | if (java_lang_invoke_MemberName::name(mname2) == NULL) |
drchase@5732 | 145 | java_lang_invoke_MemberName::set_name(mname2, java_lang_reflect_Field::name(target_oop)); |
drchase@5732 | 146 | if (java_lang_invoke_MemberName::type(mname2) == NULL) |
drchase@5732 | 147 | java_lang_invoke_MemberName::set_type(mname2, java_lang_reflect_Field::type(target_oop)); |
drchase@5732 | 148 | } |
drchase@5732 | 149 | return mname2; |
drchase@5732 | 150 | } |
twisti@3969 | 151 | } else if (target_klass == SystemDictionary::reflect_Method_klass()) { |
twisti@3969 | 152 | oop clazz = java_lang_reflect_Method::clazz(target_oop); |
twisti@3969 | 153 | int slot = java_lang_reflect_Method::slot(target_oop); |
sspitsyn@4965 | 154 | KlassHandle k(thread, java_lang_Class::as_Klass(clazz)); |
sspitsyn@4965 | 155 | if (!k.is_null() && k->oop_is_instance()) { |
sspitsyn@4965 | 156 | Method* m = InstanceKlass::cast(k())->method_with_idnum(slot); |
drchase@5732 | 157 | if (m == NULL || is_signature_polymorphic(m->intrinsic_id())) |
drchase@5732 | 158 | return NULL; // do not resolve unless there is a concrete signature |
drchase@5732 | 159 | CallInfo info(m, k()); |
drchase@5732 | 160 | return init_method_MemberName(mname, info); |
twisti@3969 | 161 | } |
twisti@3969 | 162 | } else if (target_klass == SystemDictionary::reflect_Constructor_klass()) { |
twisti@3969 | 163 | oop clazz = java_lang_reflect_Constructor::clazz(target_oop); |
twisti@3969 | 164 | int slot = java_lang_reflect_Constructor::slot(target_oop); |
sspitsyn@4965 | 165 | KlassHandle k(thread, java_lang_Class::as_Klass(clazz)); |
sspitsyn@4965 | 166 | if (!k.is_null() && k->oop_is_instance()) { |
sspitsyn@4965 | 167 | Method* m = InstanceKlass::cast(k())->method_with_idnum(slot); |
drchase@5732 | 168 | if (m == NULL) return NULL; |
drchase@5732 | 169 | CallInfo info(m, k()); |
drchase@5732 | 170 | return init_method_MemberName(mname, info); |
twisti@3969 | 171 | } |
jrose@1145 | 172 | } |
twisti@3969 | 173 | return NULL; |
jrose@1145 | 174 | } |
jrose@1145 | 175 | |
drchase@5732 | 176 | oop MethodHandles::init_method_MemberName(Handle mname, CallInfo& info) { |
drchase@5732 | 177 | assert(info.resolved_appendix().is_null(), "only normal methods here"); |
drchase@5732 | 178 | KlassHandle receiver_limit = info.resolved_klass(); |
drchase@5732 | 179 | methodHandle m = info.resolved_method(); |
drchase@5732 | 180 | int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS ); |
drchase@5732 | 181 | int vmindex = Method::invalid_vtable_index; |
drchase@5732 | 182 | |
drchase@5732 | 183 | switch (info.call_kind()) { |
drchase@5732 | 184 | case CallInfo::itable_call: |
drchase@5732 | 185 | vmindex = info.itable_index(); |
drchase@5732 | 186 | // More importantly, the itable index only works with the method holder. |
drchase@5732 | 187 | receiver_limit = m->method_holder(); |
drchase@5732 | 188 | assert(receiver_limit->verify_itable_index(vmindex), ""); |
twisti@3969 | 189 | flags |= IS_METHOD | (JVM_REF_invokeInterface << REFERENCE_KIND_SHIFT); |
drchase@5732 | 190 | break; |
drchase@5732 | 191 | |
drchase@5732 | 192 | case CallInfo::vtable_call: |
drchase@5732 | 193 | vmindex = info.vtable_index(); |
twisti@3969 | 194 | flags |= IS_METHOD | (JVM_REF_invokeVirtual << REFERENCE_KIND_SHIFT); |
drchase@5732 | 195 | assert(receiver_limit->is_subtype_of(m->method_holder()), "virtual call must be type-safe"); |
drchase@5732 | 196 | break; |
drchase@5732 | 197 | |
drchase@5732 | 198 | case CallInfo::direct_call: |
drchase@5732 | 199 | vmindex = Method::nonvirtual_vtable_index; |
drchase@5732 | 200 | if (m->is_static()) { |
drchase@5732 | 201 | flags |= IS_METHOD | (JVM_REF_invokeStatic << REFERENCE_KIND_SHIFT); |
drchase@5732 | 202 | } else if (m->is_initializer()) { |
drchase@5732 | 203 | flags |= IS_CONSTRUCTOR | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT); |
drchase@5732 | 204 | assert(receiver_limit == m->method_holder(), "constructor call must be exactly typed"); |
drchase@5732 | 205 | } else { |
drchase@5732 | 206 | flags |= IS_METHOD | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT); |
drchase@5732 | 207 | assert(receiver_limit->is_subtype_of(m->method_holder()), "special call must be type-safe"); |
drchase@5732 | 208 | } |
drchase@5732 | 209 | break; |
drchase@5732 | 210 | |
drchase@5732 | 211 | default: assert(false, "bad CallInfo"); return NULL; |
twisti@3969 | 212 | } |
twisti@3969 | 213 | |
twisti@4866 | 214 | // @CallerSensitive annotation detected |
twisti@4866 | 215 | if (m->caller_sensitive()) { |
twisti@4866 | 216 | flags |= CALLER_SENSITIVE; |
twisti@4866 | 217 | } |
twisti@4866 | 218 | |
sspitsyn@4965 | 219 | oop mname_oop = mname(); |
twisti@4866 | 220 | java_lang_invoke_MemberName::set_flags( mname_oop, flags); |
drchase@5732 | 221 | java_lang_invoke_MemberName::set_vmtarget(mname_oop, m()); |
twisti@4866 | 222 | java_lang_invoke_MemberName::set_vmindex( mname_oop, vmindex); // vtable/itable index |
twisti@4866 | 223 | java_lang_invoke_MemberName::set_clazz( mname_oop, receiver_limit->java_mirror()); |
twisti@3969 | 224 | // Note: name and type can be lazily computed by resolve_MemberName, |
twisti@3969 | 225 | // if Java code needs them as resolved String and MethodType objects. |
twisti@3969 | 226 | // The clazz must be eagerly stored, because it provides a GC |
coleenp@4037 | 227 | // root to help keep alive the Method*. |
twisti@3969 | 228 | // If relevant, the vtable or itable value is stored as vmindex. |
twisti@3969 | 229 | // This is done eagerly, since it is readily available without |
twisti@3969 | 230 | // constructing any new objects. |
twisti@3969 | 231 | // TO DO: maybe intern mname_oop |
sspitsyn@5178 | 232 | m->method_holder()->add_member_name(m->method_idnum(), mname); |
sspitsyn@5178 | 233 | |
sspitsyn@4965 | 234 | return mname(); |
twisti@3969 | 235 | } |
twisti@3969 | 236 | |
drchase@5732 | 237 | oop MethodHandles::init_field_MemberName(Handle mname, fieldDescriptor& fd, bool is_setter) { |
drchase@5732 | 238 | int flags = (jushort)( fd.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS ); |
drchase@5732 | 239 | flags |= IS_FIELD | ((fd.is_static() ? JVM_REF_getStatic : JVM_REF_getField) << REFERENCE_KIND_SHIFT); |
twisti@3969 | 240 | if (is_setter) flags += ((JVM_REF_putField - JVM_REF_getField) << REFERENCE_KIND_SHIFT); |
drchase@5732 | 241 | Metadata* vmtarget = fd.field_holder(); |
drchase@5732 | 242 | int vmindex = fd.offset(); // determines the field uniquely when combined with static bit |
sspitsyn@4965 | 243 | oop mname_oop = mname(); |
twisti@3969 | 244 | java_lang_invoke_MemberName::set_flags(mname_oop, flags); |
jrose@2639 | 245 | java_lang_invoke_MemberName::set_vmtarget(mname_oop, vmtarget); |
jrose@2639 | 246 | java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); |
drchase@5732 | 247 | java_lang_invoke_MemberName::set_clazz(mname_oop, fd.field_holder()->java_mirror()); |
drchase@5732 | 248 | oop type = field_signature_type_or_null(fd.signature()); |
drchase@5732 | 249 | oop name = field_name_or_null(fd.name()); |
twisti@3969 | 250 | if (name != NULL) |
twisti@3969 | 251 | java_lang_invoke_MemberName::set_name(mname_oop, name); |
twisti@3969 | 252 | if (type != NULL) |
twisti@3969 | 253 | java_lang_invoke_MemberName::set_type(mname_oop, type); |
twisti@3969 | 254 | // Note: name and type can be lazily computed by resolve_MemberName, |
twisti@3969 | 255 | // if Java code needs them as resolved String and Class objects. |
twisti@3969 | 256 | // Note that the incoming type oop might be pre-resolved (non-null). |
twisti@3969 | 257 | // The base clazz and field offset (vmindex) must be eagerly stored, |
twisti@3969 | 258 | // because they unambiguously identify the field. |
twisti@3969 | 259 | // Although the fieldDescriptor::_index would also identify the field, |
twisti@3969 | 260 | // we do not use it, because it is harder to decode. |
twisti@3969 | 261 | // TO DO: maybe intern mname_oop |
sspitsyn@4965 | 262 | return mname(); |
jrose@1145 | 263 | } |
jrose@1145 | 264 | |
twisti@3969 | 265 | // JVM 2.9 Special Methods: |
twisti@3969 | 266 | // A method is signature polymorphic if and only if all of the following conditions hold : |
twisti@3969 | 267 | // * It is declared in the java.lang.invoke.MethodHandle class. |
twisti@3969 | 268 | // * It has a single formal parameter of type Object[]. |
twisti@3969 | 269 | // * It has a return type of Object. |
twisti@3969 | 270 | // * It has the ACC_VARARGS and ACC_NATIVE flags set. |
coleenp@4037 | 271 | bool MethodHandles::is_method_handle_invoke_name(Klass* klass, Symbol* name) { |
twisti@3969 | 272 | if (klass == NULL) |
twisti@3969 | 273 | return false; |
twisti@3969 | 274 | // The following test will fail spuriously during bootstrap of MethodHandle itself: |
twisti@3969 | 275 | // if (klass != SystemDictionary::MethodHandle_klass()) |
twisti@3969 | 276 | // Test the name instead: |
hseigel@4278 | 277 | if (klass->name() != vmSymbols::java_lang_invoke_MethodHandle()) |
twisti@3969 | 278 | return false; |
twisti@3969 | 279 | Symbol* poly_sig = vmSymbols::object_array_object_signature(); |
coleenp@4037 | 280 | Method* m = InstanceKlass::cast(klass)->find_method(name, poly_sig); |
twisti@3969 | 281 | if (m == NULL) return false; |
twisti@3969 | 282 | int required = JVM_ACC_NATIVE | JVM_ACC_VARARGS; |
twisti@3969 | 283 | int flags = m->access_flags().as_int(); |
twisti@3969 | 284 | return (flags & required) == required; |
jrose@1145 | 285 | } |
jrose@1145 | 286 | |
twisti@3969 | 287 | |
twisti@3969 | 288 | Symbol* MethodHandles::signature_polymorphic_intrinsic_name(vmIntrinsics::ID iid) { |
twisti@3969 | 289 | assert(is_signature_polymorphic_intrinsic(iid), err_msg("iid=%d", iid)); |
twisti@3969 | 290 | switch (iid) { |
twisti@3969 | 291 | case vmIntrinsics::_invokeBasic: return vmSymbols::invokeBasic_name(); |
twisti@3969 | 292 | case vmIntrinsics::_linkToVirtual: return vmSymbols::linkToVirtual_name(); |
twisti@3969 | 293 | case vmIntrinsics::_linkToStatic: return vmSymbols::linkToStatic_name(); |
twisti@3969 | 294 | case vmIntrinsics::_linkToSpecial: return vmSymbols::linkToSpecial_name(); |
twisti@3969 | 295 | case vmIntrinsics::_linkToInterface: return vmSymbols::linkToInterface_name(); |
twisti@3969 | 296 | } |
twisti@3969 | 297 | assert(false, ""); |
twisti@3969 | 298 | return 0; |
twisti@3969 | 299 | } |
twisti@3969 | 300 | |
twisti@3969 | 301 | int MethodHandles::signature_polymorphic_intrinsic_ref_kind(vmIntrinsics::ID iid) { |
twisti@3969 | 302 | switch (iid) { |
twisti@3969 | 303 | case vmIntrinsics::_invokeBasic: return 0; |
twisti@3969 | 304 | case vmIntrinsics::_linkToVirtual: return JVM_REF_invokeVirtual; |
twisti@3969 | 305 | case vmIntrinsics::_linkToStatic: return JVM_REF_invokeStatic; |
twisti@3969 | 306 | case vmIntrinsics::_linkToSpecial: return JVM_REF_invokeSpecial; |
twisti@3969 | 307 | case vmIntrinsics::_linkToInterface: return JVM_REF_invokeInterface; |
twisti@3969 | 308 | } |
twisti@3969 | 309 | assert(false, err_msg("iid=%d", iid)); |
twisti@3969 | 310 | return 0; |
twisti@3969 | 311 | } |
twisti@3969 | 312 | |
twisti@3969 | 313 | vmIntrinsics::ID MethodHandles::signature_polymorphic_name_id(Symbol* name) { |
twisti@3969 | 314 | vmSymbols::SID name_id = vmSymbols::find_sid(name); |
twisti@3969 | 315 | switch (name_id) { |
twisti@3969 | 316 | // The ID _invokeGeneric stands for all non-static signature-polymorphic methods, except built-ins. |
twisti@3969 | 317 | case vmSymbols::VM_SYMBOL_ENUM_NAME(invoke_name): return vmIntrinsics::_invokeGeneric; |
twisti@3969 | 318 | // The only built-in non-static signature-polymorphic method is MethodHandle.invokeBasic: |
twisti@3969 | 319 | case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeBasic_name): return vmIntrinsics::_invokeBasic; |
twisti@3969 | 320 | |
twisti@3969 | 321 | // There is one static signature-polymorphic method for each JVM invocation mode. |
twisti@3969 | 322 | case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToVirtual_name): return vmIntrinsics::_linkToVirtual; |
twisti@3969 | 323 | case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToStatic_name): return vmIntrinsics::_linkToStatic; |
twisti@3969 | 324 | case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToSpecial_name): return vmIntrinsics::_linkToSpecial; |
twisti@3969 | 325 | case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToInterface_name): return vmIntrinsics::_linkToInterface; |
twisti@3969 | 326 | } |
twisti@3969 | 327 | |
twisti@3969 | 328 | // Cover the case of invokeExact and any future variants of invokeFoo. |
coleenp@4037 | 329 | Klass* mh_klass = SystemDictionary::well_known_klass( |
twisti@3969 | 330 | SystemDictionary::WK_KLASS_ENUM_NAME(MethodHandle_klass) ); |
twisti@3969 | 331 | if (mh_klass != NULL && is_method_handle_invoke_name(mh_klass, name)) |
twisti@3969 | 332 | return vmIntrinsics::_invokeGeneric; |
twisti@3969 | 333 | |
twisti@3969 | 334 | // Note: The pseudo-intrinsic _compiledLambdaForm is never linked against. |
twisti@3969 | 335 | // Instead it is used to mark lambda forms bound to invokehandle or invokedynamic. |
twisti@3969 | 336 | return vmIntrinsics::_none; |
twisti@3969 | 337 | } |
twisti@3969 | 338 | |
coleenp@4037 | 339 | vmIntrinsics::ID MethodHandles::signature_polymorphic_name_id(Klass* klass, Symbol* name) { |
twisti@3969 | 340 | if (klass != NULL && |
hseigel@4278 | 341 | klass->name() == vmSymbols::java_lang_invoke_MethodHandle()) { |
twisti@3969 | 342 | vmIntrinsics::ID iid = signature_polymorphic_name_id(name); |
twisti@3969 | 343 | if (iid != vmIntrinsics::_none) |
twisti@3969 | 344 | return iid; |
twisti@3969 | 345 | if (is_method_handle_invoke_name(klass, name)) |
twisti@3969 | 346 | return vmIntrinsics::_invokeGeneric; |
twisti@3969 | 347 | } |
twisti@3969 | 348 | return vmIntrinsics::_none; |
twisti@3969 | 349 | } |
twisti@3969 | 350 | |
twisti@3969 | 351 | |
coleenp@2497 | 352 | // convert the external string or reflective type to an internal signature |
twisti@3969 | 353 | Symbol* MethodHandles::lookup_signature(oop type_str, bool intern_if_not_found, TRAPS) { |
jrose@2639 | 354 | if (java_lang_invoke_MethodType::is_instance(type_str)) { |
twisti@3969 | 355 | return java_lang_invoke_MethodType::as_signature(type_str, intern_if_not_found, CHECK_NULL); |
coleenp@2497 | 356 | } else if (java_lang_Class::is_instance(type_str)) { |
coleenp@2497 | 357 | return java_lang_Class::as_signature(type_str, false, CHECK_NULL); |
coleenp@2497 | 358 | } else if (java_lang_String::is_instance(type_str)) { |
twisti@3969 | 359 | if (intern_if_not_found) { |
coleenp@2497 | 360 | return java_lang_String::as_symbol(type_str, CHECK_NULL); |
coleenp@2497 | 361 | } else { |
coleenp@2497 | 362 | return java_lang_String::as_symbol_or_null(type_str); |
coleenp@2497 | 363 | } |
coleenp@2497 | 364 | } else { |
coleenp@2497 | 365 | THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized type", NULL); |
coleenp@2497 | 366 | } |
coleenp@2497 | 367 | } |
coleenp@2497 | 368 | |
twisti@3969 | 369 | static const char OBJ_SIG[] = "Ljava/lang/Object;"; |
twisti@3969 | 370 | enum { OBJ_SIG_LEN = 18 }; |
twisti@3969 | 371 | |
twisti@3969 | 372 | bool MethodHandles::is_basic_type_signature(Symbol* sig) { |
twisti@3969 | 373 | assert(vmSymbols::object_signature()->utf8_length() == (int)OBJ_SIG_LEN, ""); |
twisti@3969 | 374 | assert(vmSymbols::object_signature()->equals(OBJ_SIG), ""); |
twisti@3969 | 375 | const int len = sig->utf8_length(); |
twisti@3969 | 376 | for (int i = 0; i < len; i++) { |
twisti@3969 | 377 | switch (sig->byte_at(i)) { |
twisti@3969 | 378 | case 'L': |
twisti@3969 | 379 | // only java/lang/Object is valid here |
twisti@3969 | 380 | if (sig->index_of_at(i, OBJ_SIG, OBJ_SIG_LEN) != i) |
twisti@3969 | 381 | return false; |
twisti@3969 | 382 | i += OBJ_SIG_LEN-1; //-1 because of i++ in loop |
twisti@3969 | 383 | continue; |
twisti@3969 | 384 | case '(': case ')': case 'V': |
twisti@3969 | 385 | case 'I': case 'J': case 'F': case 'D': |
twisti@3969 | 386 | continue; |
twisti@3969 | 387 | //case '[': |
twisti@3969 | 388 | //case 'Z': case 'B': case 'C': case 'S': |
twisti@3969 | 389 | default: |
twisti@3969 | 390 | return false; |
twisti@3969 | 391 | } |
twisti@3969 | 392 | } |
twisti@3969 | 393 | return true; |
twisti@3969 | 394 | } |
twisti@3969 | 395 | |
twisti@3969 | 396 | Symbol* MethodHandles::lookup_basic_type_signature(Symbol* sig, bool keep_last_arg, TRAPS) { |
twisti@3969 | 397 | Symbol* bsig = NULL; |
twisti@3969 | 398 | if (sig == NULL) { |
twisti@3969 | 399 | return sig; |
twisti@3969 | 400 | } else if (is_basic_type_signature(sig)) { |
twisti@3969 | 401 | sig->increment_refcount(); |
twisti@3969 | 402 | return sig; // that was easy |
twisti@3969 | 403 | } else if (sig->byte_at(0) != '(') { |
twisti@3969 | 404 | BasicType bt = char2type(sig->byte_at(0)); |
twisti@3969 | 405 | if (is_subword_type(bt)) { |
twisti@3969 | 406 | bsig = vmSymbols::int_signature(); |
twisti@3969 | 407 | } else { |
twisti@3969 | 408 | assert(bt == T_OBJECT || bt == T_ARRAY, "is_basic_type_signature was false"); |
twisti@3969 | 409 | bsig = vmSymbols::object_signature(); |
twisti@3969 | 410 | } |
twisti@3969 | 411 | } else { |
twisti@3969 | 412 | ResourceMark rm; |
twisti@3969 | 413 | stringStream buffer(128); |
twisti@3969 | 414 | buffer.put('('); |
twisti@3969 | 415 | int arg_pos = 0, keep_arg_pos = -1; |
twisti@3969 | 416 | if (keep_last_arg) |
twisti@3969 | 417 | keep_arg_pos = ArgumentCount(sig).size() - 1; |
twisti@3969 | 418 | for (SignatureStream ss(sig); !ss.is_done(); ss.next()) { |
twisti@3969 | 419 | BasicType bt = ss.type(); |
twisti@3969 | 420 | size_t this_arg_pos = buffer.size(); |
twisti@3969 | 421 | if (ss.at_return_type()) { |
twisti@3969 | 422 | buffer.put(')'); |
twisti@3969 | 423 | } |
twisti@3969 | 424 | if (arg_pos == keep_arg_pos) { |
twisti@3969 | 425 | buffer.write((char*) ss.raw_bytes(), |
twisti@3969 | 426 | (int) ss.raw_length()); |
twisti@3969 | 427 | } else if (bt == T_OBJECT || bt == T_ARRAY) { |
twisti@3969 | 428 | buffer.write(OBJ_SIG, OBJ_SIG_LEN); |
twisti@3969 | 429 | } else { |
twisti@3969 | 430 | if (is_subword_type(bt)) |
twisti@3969 | 431 | bt = T_INT; |
twisti@3969 | 432 | buffer.put(type2char(bt)); |
twisti@3969 | 433 | } |
twisti@3969 | 434 | arg_pos++; |
twisti@3969 | 435 | } |
twisti@3969 | 436 | const char* sigstr = buffer.base(); |
twisti@3969 | 437 | int siglen = (int) buffer.size(); |
twisti@3969 | 438 | bsig = SymbolTable::new_symbol(sigstr, siglen, THREAD); |
twisti@3969 | 439 | } |
twisti@3969 | 440 | assert(is_basic_type_signature(bsig) || |
twisti@3969 | 441 | // detune assert in case the injected argument is not a basic type: |
twisti@3969 | 442 | keep_last_arg, ""); |
twisti@3969 | 443 | return bsig; |
twisti@3969 | 444 | } |
twisti@3969 | 445 | |
twisti@3969 | 446 | void MethodHandles::print_as_basic_type_signature_on(outputStream* st, |
twisti@3969 | 447 | Symbol* sig, |
twisti@3969 | 448 | bool keep_arrays, |
twisti@3969 | 449 | bool keep_basic_names) { |
twisti@3969 | 450 | st = st ? st : tty; |
twisti@3969 | 451 | int len = sig->utf8_length(); |
twisti@3969 | 452 | int array = 0; |
twisti@3969 | 453 | bool prev_type = false; |
twisti@3969 | 454 | for (int i = 0; i < len; i++) { |
twisti@3969 | 455 | char ch = sig->byte_at(i); |
twisti@3969 | 456 | switch (ch) { |
twisti@3969 | 457 | case '(': case ')': |
twisti@3969 | 458 | prev_type = false; |
twisti@3969 | 459 | st->put(ch); |
twisti@3969 | 460 | continue; |
twisti@3969 | 461 | case '[': |
twisti@3969 | 462 | if (!keep_basic_names && keep_arrays) |
twisti@3969 | 463 | st->put(ch); |
twisti@3969 | 464 | array++; |
twisti@3969 | 465 | continue; |
twisti@3969 | 466 | case 'L': |
twisti@3969 | 467 | { |
twisti@3969 | 468 | if (prev_type) st->put(','); |
twisti@3969 | 469 | int start = i+1, slash = start; |
twisti@3969 | 470 | while (++i < len && (ch = sig->byte_at(i)) != ';') { |
twisti@3969 | 471 | if (ch == '/' || ch == '.' || ch == '$') slash = i+1; |
twisti@3969 | 472 | } |
twisti@3969 | 473 | if (slash < i) start = slash; |
twisti@3969 | 474 | if (!keep_basic_names) { |
twisti@3969 | 475 | st->put('L'); |
twisti@3969 | 476 | } else { |
twisti@3969 | 477 | for (int j = start; j < i; j++) |
twisti@3969 | 478 | st->put(sig->byte_at(j)); |
twisti@3969 | 479 | prev_type = true; |
twisti@3969 | 480 | } |
twisti@3969 | 481 | break; |
twisti@3969 | 482 | } |
twisti@3969 | 483 | default: |
twisti@3969 | 484 | { |
twisti@3969 | 485 | if (array && char2type(ch) != T_ILLEGAL && !keep_arrays) { |
twisti@3969 | 486 | ch = '['; |
twisti@3969 | 487 | array = 0; |
twisti@3969 | 488 | } |
twisti@3969 | 489 | if (prev_type) st->put(','); |
twisti@3969 | 490 | const char* n = NULL; |
twisti@3969 | 491 | if (keep_basic_names) |
twisti@3969 | 492 | n = type2name(char2type(ch)); |
twisti@3969 | 493 | if (n == NULL) { |
twisti@3969 | 494 | // unknown letter, or we don't want to know its name |
twisti@3969 | 495 | st->put(ch); |
twisti@3969 | 496 | } else { |
twisti@3969 | 497 | st->print(n); |
twisti@3969 | 498 | prev_type = true; |
twisti@3969 | 499 | } |
twisti@3969 | 500 | break; |
twisti@3969 | 501 | } |
twisti@3969 | 502 | } |
twisti@3969 | 503 | // Switch break goes here to take care of array suffix: |
twisti@3969 | 504 | if (prev_type) { |
twisti@3969 | 505 | while (array > 0) { |
twisti@3969 | 506 | st->print("[]"); |
twisti@3969 | 507 | --array; |
twisti@3969 | 508 | } |
twisti@3969 | 509 | } |
twisti@3969 | 510 | array = 0; |
twisti@3969 | 511 | } |
twisti@3969 | 512 | } |
twisti@3969 | 513 | |
twisti@3969 | 514 | |
twisti@3969 | 515 | |
twisti@3969 | 516 | static oop object_java_mirror() { |
hseigel@4278 | 517 | return SystemDictionary::Object_klass()->java_mirror(); |
twisti@3969 | 518 | } |
twisti@3969 | 519 | |
drchase@5732 | 520 | oop MethodHandles::field_name_or_null(Symbol* s) { |
twisti@3969 | 521 | if (s == NULL) return NULL; |
twisti@3969 | 522 | return StringTable::lookup(s); |
twisti@3969 | 523 | } |
twisti@3969 | 524 | |
drchase@5732 | 525 | oop MethodHandles::field_signature_type_or_null(Symbol* s) { |
twisti@3969 | 526 | if (s == NULL) return NULL; |
twisti@3969 | 527 | BasicType bt = FieldType::basic_type(s); |
twisti@3969 | 528 | if (is_java_primitive(bt)) { |
twisti@3969 | 529 | assert(s->utf8_length() == 1, ""); |
twisti@3969 | 530 | return java_lang_Class::primitive_mirror(bt); |
twisti@3969 | 531 | } |
twisti@3969 | 532 | // Here are some more short cuts for common types. |
twisti@3969 | 533 | // They are optional, since reference types can be resolved lazily. |
twisti@3969 | 534 | if (bt == T_OBJECT) { |
twisti@3969 | 535 | if (s == vmSymbols::object_signature()) { |
twisti@3969 | 536 | return object_java_mirror(); |
twisti@3969 | 537 | } else if (s == vmSymbols::class_signature()) { |
hseigel@4278 | 538 | return SystemDictionary::Class_klass()->java_mirror(); |
twisti@3969 | 539 | } else if (s == vmSymbols::string_signature()) { |
hseigel@4278 | 540 | return SystemDictionary::String_klass()->java_mirror(); |
twisti@3969 | 541 | } |
twisti@3969 | 542 | } |
twisti@3969 | 543 | return NULL; |
twisti@3969 | 544 | } |
twisti@3969 | 545 | |
coleenp@4037 | 546 | |
jrose@1145 | 547 | // An unresolved member name is a mere symbolic reference. |
jrose@1145 | 548 | // Resolving it plants a vmtarget/vmindex in it, |
coleenp@4037 | 549 | // which refers directly to JVM internals. |
twisti@3969 | 550 | Handle MethodHandles::resolve_MemberName(Handle mname, TRAPS) { |
twisti@3969 | 551 | Handle empty; |
jrose@2639 | 552 | assert(java_lang_invoke_MemberName::is_instance(mname()), ""); |
twisti@3969 | 553 | |
twisti@3969 | 554 | if (java_lang_invoke_MemberName::vmtarget(mname()) != NULL) { |
twisti@3969 | 555 | // Already resolved. |
twisti@3969 | 556 | DEBUG_ONLY(int vmindex = java_lang_invoke_MemberName::vmindex(mname())); |
coleenp@4037 | 557 | assert(vmindex >= Method::nonvirtual_vtable_index, ""); |
twisti@3969 | 558 | return mname; |
twisti@3969 | 559 | } |
twisti@3969 | 560 | |
twisti@2806 | 561 | Handle defc_oop(THREAD, java_lang_invoke_MemberName::clazz(mname())); |
twisti@2806 | 562 | Handle name_str(THREAD, java_lang_invoke_MemberName::name( mname())); |
twisti@2806 | 563 | Handle type_str(THREAD, java_lang_invoke_MemberName::type( mname())); |
twisti@2806 | 564 | int flags = java_lang_invoke_MemberName::flags(mname()); |
twisti@3969 | 565 | int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK; |
twisti@3969 | 566 | if (!ref_kind_is_valid(ref_kind)) { |
twisti@3969 | 567 | THROW_MSG_(vmSymbols::java_lang_InternalError(), "obsolete MemberName format", empty); |
twisti@3969 | 568 | } |
twisti@3969 | 569 | |
twisti@3969 | 570 | DEBUG_ONLY(int old_vmindex); |
twisti@3969 | 571 | assert((old_vmindex = java_lang_invoke_MemberName::vmindex(mname())) == 0, "clean input"); |
jrose@1145 | 572 | |
twisti@2806 | 573 | if (defc_oop.is_null() || name_str.is_null() || type_str.is_null()) { |
twisti@3969 | 574 | THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "nothing to resolve", empty); |
jrose@1145 | 575 | } |
twisti@2806 | 576 | |
twisti@2806 | 577 | instanceKlassHandle defc; |
twisti@2806 | 578 | { |
coleenp@4037 | 579 | Klass* defc_klass = java_lang_Class::as_Klass(defc_oop()); |
coleenp@4037 | 580 | if (defc_klass == NULL) return empty; // a primitive; no resolution possible |
hseigel@4278 | 581 | if (!defc_klass->oop_is_instance()) { |
hseigel@4278 | 582 | if (!defc_klass->oop_is_array()) return empty; |
coleenp@4037 | 583 | defc_klass = SystemDictionary::Object_klass(); |
twisti@2806 | 584 | } |
coleenp@4037 | 585 | defc = instanceKlassHandle(THREAD, defc_klass); |
jrose@1145 | 586 | } |
jrose@1145 | 587 | if (defc.is_null()) { |
twisti@3969 | 588 | THROW_MSG_(vmSymbols::java_lang_InternalError(), "primitive class", empty); |
jrose@1145 | 589 | } |
twisti@3969 | 590 | defc->link_class(CHECK_(empty)); // possible safepoint |
jrose@1145 | 591 | |
jrose@1145 | 592 | // convert the external string name to an internal symbol |
twisti@2806 | 593 | TempNewSymbol name = java_lang_String::as_symbol_or_null(name_str()); |
twisti@3969 | 594 | if (name == NULL) return empty; // no such name |
never@2978 | 595 | if (name == vmSymbols::class_initializer_name()) |
twisti@3969 | 596 | return empty; // illegal name |
jrose@1145 | 597 | |
twisti@3969 | 598 | vmIntrinsics::ID mh_invoke_id = vmIntrinsics::_none; |
jrose@1863 | 599 | if ((flags & ALL_KINDS) == IS_METHOD && |
twisti@3969 | 600 | (defc() == SystemDictionary::MethodHandle_klass()) && |
twisti@3969 | 601 | (ref_kind == JVM_REF_invokeVirtual || |
twisti@3969 | 602 | ref_kind == JVM_REF_invokeSpecial || |
twisti@3969 | 603 | // static invocation mode is required for _linkToVirtual, etc.: |
twisti@3969 | 604 | ref_kind == JVM_REF_invokeStatic)) { |
twisti@3969 | 605 | vmIntrinsics::ID iid = signature_polymorphic_name_id(name); |
twisti@3969 | 606 | if (iid != vmIntrinsics::_none && |
twisti@3969 | 607 | ((ref_kind == JVM_REF_invokeStatic) == is_signature_polymorphic_static(iid))) { |
twisti@3969 | 608 | // Virtual methods invoke and invokeExact, plus internal invokers like _invokeBasic. |
twisti@3969 | 609 | // For a static reference it could an internal linkage routine like _linkToVirtual, etc. |
twisti@3969 | 610 | mh_invoke_id = iid; |
twisti@3969 | 611 | } |
twisti@2806 | 612 | } |
jrose@1863 | 613 | |
jrose@1145 | 614 | // convert the external string or reflective type to an internal signature |
twisti@3969 | 615 | TempNewSymbol type = lookup_signature(type_str(), (mh_invoke_id != vmIntrinsics::_none), CHECK_(empty)); |
twisti@3969 | 616 | if (type == NULL) return empty; // no such signature exists in the VM |
jrose@1145 | 617 | |
jrose@1145 | 618 | // Time to do the lookup. |
jrose@1145 | 619 | switch (flags & ALL_KINDS) { |
jrose@1145 | 620 | case IS_METHOD: |
jrose@1145 | 621 | { |
jrose@1145 | 622 | CallInfo result; |
jrose@1145 | 623 | { |
twisti@3969 | 624 | assert(!HAS_PENDING_EXCEPTION, ""); |
twisti@3969 | 625 | if (ref_kind == JVM_REF_invokeStatic) { |
jrose@1145 | 626 | LinkResolver::resolve_static_call(result, |
jrose@1145 | 627 | defc, name, type, KlassHandle(), false, false, THREAD); |
twisti@3969 | 628 | } else if (ref_kind == JVM_REF_invokeInterface) { |
jrose@1145 | 629 | LinkResolver::resolve_interface_call(result, Handle(), defc, |
jrose@1145 | 630 | defc, name, type, KlassHandle(), false, false, THREAD); |
twisti@3969 | 631 | } else if (mh_invoke_id != vmIntrinsics::_none) { |
twisti@3969 | 632 | assert(!is_signature_polymorphic_static(mh_invoke_id), ""); |
twisti@3969 | 633 | LinkResolver::resolve_handle_call(result, |
twisti@3969 | 634 | defc, name, type, KlassHandle(), THREAD); |
twisti@3969 | 635 | } else if (ref_kind == JVM_REF_invokeSpecial) { |
twisti@3969 | 636 | LinkResolver::resolve_special_call(result, |
twisti@3969 | 637 | defc, name, type, KlassHandle(), false, THREAD); |
twisti@3969 | 638 | } else if (ref_kind == JVM_REF_invokeVirtual) { |
jrose@1145 | 639 | LinkResolver::resolve_virtual_call(result, Handle(), defc, |
jrose@1145 | 640 | defc, name, type, KlassHandle(), false, false, THREAD); |
twisti@3969 | 641 | } else { |
twisti@3969 | 642 | assert(false, err_msg("ref_kind=%d", ref_kind)); |
jrose@1145 | 643 | } |
jrose@1145 | 644 | if (HAS_PENDING_EXCEPTION) { |
twisti@3969 | 645 | return empty; |
jrose@1145 | 646 | } |
jrose@1145 | 647 | } |
drchase@5732 | 648 | if (result.resolved_appendix().not_null()) { |
drchase@5732 | 649 | // The resolved MemberName must not be accompanied by an appendix argument, |
drchase@5732 | 650 | // since there is no way to bind this value into the MemberName. |
drchase@5732 | 651 | // Caller is responsible to prevent this from happening. |
drchase@5732 | 652 | THROW_MSG_(vmSymbols::java_lang_InternalError(), "appendix", empty); |
drchase@5732 | 653 | } |
drchase@5732 | 654 | oop mname2 = init_method_MemberName(mname, result); |
drchase@5732 | 655 | return Handle(THREAD, mname2); |
jrose@1145 | 656 | } |
jrose@1145 | 657 | case IS_CONSTRUCTOR: |
jrose@1145 | 658 | { |
jrose@1145 | 659 | CallInfo result; |
jrose@1145 | 660 | { |
twisti@3969 | 661 | assert(!HAS_PENDING_EXCEPTION, ""); |
coleenp@2497 | 662 | if (name == vmSymbols::object_initializer_name()) { |
jrose@1145 | 663 | LinkResolver::resolve_special_call(result, |
jrose@1145 | 664 | defc, name, type, KlassHandle(), false, THREAD); |
jrose@1145 | 665 | } else { |
jrose@1145 | 666 | break; // will throw after end of switch |
jrose@1145 | 667 | } |
jrose@1145 | 668 | if (HAS_PENDING_EXCEPTION) { |
twisti@3969 | 669 | return empty; |
jrose@1145 | 670 | } |
jrose@1145 | 671 | } |
jrose@1145 | 672 | assert(result.is_statically_bound(), ""); |
drchase@5732 | 673 | oop mname2 = init_method_MemberName(mname, result); |
drchase@5732 | 674 | return Handle(THREAD, mname2); |
jrose@1145 | 675 | } |
jrose@1145 | 676 | case IS_FIELD: |
jrose@1145 | 677 | { |
drchase@5732 | 678 | fieldDescriptor result; // find_field initializes fd if found |
drchase@5732 | 679 | { |
drchase@5732 | 680 | assert(!HAS_PENDING_EXCEPTION, ""); |
drchase@5732 | 681 | LinkResolver::resolve_field(result, defc, name, type, KlassHandle(), Bytecodes::_nop, false, false, THREAD); |
drchase@5732 | 682 | if (HAS_PENDING_EXCEPTION) { |
drchase@5732 | 683 | return empty; |
drchase@5732 | 684 | } |
drchase@5732 | 685 | } |
drchase@5732 | 686 | oop mname2 = init_field_MemberName(mname, result, ref_kind_is_setter(ref_kind)); |
drchase@5732 | 687 | return Handle(THREAD, mname2); |
jrose@1145 | 688 | } |
jrose@1863 | 689 | default: |
twisti@3969 | 690 | THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format", empty); |
jrose@1145 | 691 | } |
jrose@1863 | 692 | |
twisti@3969 | 693 | return empty; |
jrose@1145 | 694 | } |
jrose@1145 | 695 | |
jrose@1145 | 696 | // Conversely, a member name which is only initialized from JVM internals |
jrose@1145 | 697 | // may have null defc, name, and type fields. |
jrose@1145 | 698 | // Resolving it plants a vmtarget/vmindex in it, |
jrose@1145 | 699 | // which refers directly to JVM internals. |
jrose@1145 | 700 | void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) { |
jrose@2639 | 701 | assert(java_lang_invoke_MemberName::is_instance(mname()), ""); |
coleenp@4037 | 702 | Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(mname()); |
jrose@2639 | 703 | int vmindex = java_lang_invoke_MemberName::vmindex(mname()); |
twisti@3969 | 704 | if (vmtarget == NULL) { |
jrose@1145 | 705 | THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand"); |
jrose@1145 | 706 | } |
jrose@1145 | 707 | |
jrose@2639 | 708 | bool have_defc = (java_lang_invoke_MemberName::clazz(mname()) != NULL); |
jrose@2639 | 709 | bool have_name = (java_lang_invoke_MemberName::name(mname()) != NULL); |
jrose@2639 | 710 | bool have_type = (java_lang_invoke_MemberName::type(mname()) != NULL); |
jrose@2639 | 711 | int flags = java_lang_invoke_MemberName::flags(mname()); |
jrose@1145 | 712 | |
jrose@1145 | 713 | if (suppress != 0) { |
jrose@1145 | 714 | if (suppress & _suppress_defc) have_defc = true; |
jrose@1145 | 715 | if (suppress & _suppress_name) have_name = true; |
jrose@1145 | 716 | if (suppress & _suppress_type) have_type = true; |
jrose@1145 | 717 | } |
jrose@1145 | 718 | |
jrose@1145 | 719 | if (have_defc && have_name && have_type) return; // nothing needed |
jrose@1145 | 720 | |
jrose@1145 | 721 | switch (flags & ALL_KINDS) { |
jrose@1145 | 722 | case IS_METHOD: |
jrose@1145 | 723 | case IS_CONSTRUCTOR: |
jrose@1145 | 724 | { |
coleenp@4037 | 725 | assert(vmtarget->is_method(), "method or constructor vmtarget is Method*"); |
coleenp@4037 | 726 | methodHandle m(THREAD, (Method*)vmtarget); |
twisti@3969 | 727 | DEBUG_ONLY(vmtarget = NULL); // safety |
jrose@1145 | 728 | if (m.is_null()) break; |
jrose@1145 | 729 | if (!have_defc) { |
coleenp@4251 | 730 | InstanceKlass* defc = m->method_holder(); |
coleenp@4251 | 731 | java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror()); |
jrose@1145 | 732 | } |
jrose@1145 | 733 | if (!have_name) { |
jrose@1145 | 734 | //not java_lang_String::create_from_symbol; let's intern member names |
jrose@1145 | 735 | Handle name = StringTable::intern(m->name(), CHECK); |
jrose@2639 | 736 | java_lang_invoke_MemberName::set_name(mname(), name()); |
jrose@1145 | 737 | } |
jrose@1145 | 738 | if (!have_type) { |
jrose@1145 | 739 | Handle type = java_lang_String::create_from_symbol(m->signature(), CHECK); |
jrose@2639 | 740 | java_lang_invoke_MemberName::set_type(mname(), type()); |
jrose@1145 | 741 | } |
jrose@1145 | 742 | return; |
jrose@1145 | 743 | } |
jrose@1145 | 744 | case IS_FIELD: |
jrose@1145 | 745 | { |
coleenp@4037 | 746 | assert(vmtarget->is_klass(), "field vmtarget is Klass*"); |
hseigel@4278 | 747 | if (!((Klass*) vmtarget)->oop_is_instance()) break; |
coleenp@4037 | 748 | instanceKlassHandle defc(THREAD, (Klass*) vmtarget); |
twisti@3969 | 749 | DEBUG_ONLY(vmtarget = NULL); // safety |
jrose@1145 | 750 | bool is_static = ((flags & JVM_ACC_STATIC) != 0); |
jrose@1145 | 751 | fieldDescriptor fd; // find_field initializes fd if found |
jrose@1145 | 752 | if (!defc->find_field_from_offset(vmindex, is_static, &fd)) |
jrose@1145 | 753 | break; // cannot expand |
jrose@1145 | 754 | if (!have_defc) { |
jrose@2639 | 755 | java_lang_invoke_MemberName::set_clazz(mname(), defc->java_mirror()); |
jrose@1145 | 756 | } |
jrose@1145 | 757 | if (!have_name) { |
jrose@1145 | 758 | //not java_lang_String::create_from_symbol; let's intern member names |
jrose@1145 | 759 | Handle name = StringTable::intern(fd.name(), CHECK); |
jrose@2639 | 760 | java_lang_invoke_MemberName::set_name(mname(), name()); |
jrose@1145 | 761 | } |
jrose@1145 | 762 | if (!have_type) { |
twisti@3969 | 763 | // If it is a primitive field type, don't mess with short strings like "I". |
twisti@3969 | 764 | Handle type = field_signature_type_or_null(fd.signature()); |
twisti@3969 | 765 | if (type.is_null()) { |
twisti@3969 | 766 | java_lang_String::create_from_symbol(fd.signature(), CHECK); |
twisti@3969 | 767 | } |
jrose@2639 | 768 | java_lang_invoke_MemberName::set_type(mname(), type()); |
jrose@1145 | 769 | } |
jrose@1145 | 770 | return; |
jrose@1145 | 771 | } |
jrose@1145 | 772 | } |
jrose@1145 | 773 | THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format"); |
jrose@1145 | 774 | } |
jrose@1145 | 775 | |
sspitsyn@4965 | 776 | int MethodHandles::find_MemberNames(KlassHandle k, |
coleenp@2497 | 777 | Symbol* name, Symbol* sig, |
sspitsyn@4965 | 778 | int mflags, KlassHandle caller, |
sspitsyn@4965 | 779 | int skip, objArrayHandle results) { |
jrose@1145 | 780 | // %%% take caller into account! |
jrose@1145 | 781 | |
sspitsyn@4965 | 782 | Thread* thread = Thread::current(); |
sspitsyn@4965 | 783 | |
sspitsyn@4965 | 784 | if (k.is_null() || !k->oop_is_instance()) return -1; |
jrose@1145 | 785 | |
jrose@1145 | 786 | int rfill = 0, rlimit = results->length(), rskip = skip; |
jrose@1145 | 787 | // overflow measurement: |
jrose@1145 | 788 | int overflow = 0, overflow_limit = MAX2(1000, rlimit); |
jrose@1145 | 789 | |
jrose@1145 | 790 | int match_flags = mflags; |
jrose@1145 | 791 | bool search_superc = ((match_flags & SEARCH_SUPERCLASSES) != 0); |
jrose@1145 | 792 | bool search_intfc = ((match_flags & SEARCH_INTERFACES) != 0); |
jrose@1145 | 793 | bool local_only = !(search_superc | search_intfc); |
jrose@1145 | 794 | bool classes_only = false; |
jrose@1145 | 795 | |
jrose@1145 | 796 | if (name != NULL) { |
jrose@1145 | 797 | if (name->utf8_length() == 0) return 0; // a match is not possible |
jrose@1145 | 798 | } |
jrose@1145 | 799 | if (sig != NULL) { |
jrose@1145 | 800 | if (sig->utf8_length() == 0) return 0; // a match is not possible |
jrose@1145 | 801 | if (sig->byte_at(0) == '(') |
jrose@1145 | 802 | match_flags &= ~(IS_FIELD | IS_TYPE); |
jrose@1145 | 803 | else |
jrose@1145 | 804 | match_flags &= ~(IS_CONSTRUCTOR | IS_METHOD); |
jrose@1145 | 805 | } |
jrose@1145 | 806 | |
jrose@1145 | 807 | if ((match_flags & IS_TYPE) != 0) { |
jrose@1145 | 808 | // NYI, and Core Reflection works quite well for this query |
jrose@1145 | 809 | } |
jrose@1145 | 810 | |
jrose@1145 | 811 | if ((match_flags & IS_FIELD) != 0) { |
sspitsyn@4965 | 812 | for (FieldStream st(k(), local_only, !search_intfc); !st.eos(); st.next()) { |
jrose@1145 | 813 | if (name != NULL && st.name() != name) |
jrose@1145 | 814 | continue; |
jrose@1145 | 815 | if (sig != NULL && st.signature() != sig) |
jrose@1145 | 816 | continue; |
jrose@1145 | 817 | // passed the filters |
jrose@1145 | 818 | if (rskip > 0) { |
jrose@1145 | 819 | --rskip; |
jrose@1145 | 820 | } else if (rfill < rlimit) { |
sspitsyn@4965 | 821 | Handle result(thread, results->obj_at(rfill++)); |
sspitsyn@4965 | 822 | if (!java_lang_invoke_MemberName::is_instance(result())) |
jrose@1145 | 823 | return -99; // caller bug! |
drchase@5732 | 824 | oop saved = MethodHandles::init_field_MemberName(result, st.field_descriptor()); |
sspitsyn@4965 | 825 | if (saved != result()) |
twisti@3969 | 826 | results->obj_at_put(rfill-1, saved); // show saved instance to user |
jrose@1145 | 827 | } else if (++overflow >= overflow_limit) { |
jrose@1145 | 828 | match_flags = 0; break; // got tired of looking at overflow |
jrose@1145 | 829 | } |
jrose@1145 | 830 | } |
jrose@1145 | 831 | } |
jrose@1145 | 832 | |
jrose@1145 | 833 | if ((match_flags & (IS_METHOD | IS_CONSTRUCTOR)) != 0) { |
jrose@1145 | 834 | // watch out for these guys: |
coleenp@2497 | 835 | Symbol* init_name = vmSymbols::object_initializer_name(); |
coleenp@2497 | 836 | Symbol* clinit_name = vmSymbols::class_initializer_name(); |
jrose@1145 | 837 | if (name == clinit_name) clinit_name = NULL; // hack for exposing <clinit> |
jrose@1145 | 838 | bool negate_name_test = false; |
jrose@1145 | 839 | // fix name so that it captures the intention of IS_CONSTRUCTOR |
jrose@1145 | 840 | if (!(match_flags & IS_METHOD)) { |
jrose@1145 | 841 | // constructors only |
jrose@1145 | 842 | if (name == NULL) { |
jrose@1145 | 843 | name = init_name; |
jrose@1145 | 844 | } else if (name != init_name) { |
jrose@1145 | 845 | return 0; // no constructors of this method name |
jrose@1145 | 846 | } |
jrose@1145 | 847 | } else if (!(match_flags & IS_CONSTRUCTOR)) { |
jrose@1145 | 848 | // methods only |
jrose@1145 | 849 | if (name == NULL) { |
jrose@1145 | 850 | name = init_name; |
jrose@1145 | 851 | negate_name_test = true; // if we see the name, we *omit* the entry |
jrose@1145 | 852 | } else if (name == init_name) { |
jrose@1145 | 853 | return 0; // no methods of this constructor name |
jrose@1145 | 854 | } |
jrose@1145 | 855 | } else { |
jrose@1145 | 856 | // caller will accept either sort; no need to adjust name |
jrose@1145 | 857 | } |
sspitsyn@4965 | 858 | for (MethodStream st(k(), local_only, !search_intfc); !st.eos(); st.next()) { |
coleenp@4037 | 859 | Method* m = st.method(); |
coleenp@2497 | 860 | Symbol* m_name = m->name(); |
jrose@1145 | 861 | if (m_name == clinit_name) |
jrose@1145 | 862 | continue; |
jrose@1145 | 863 | if (name != NULL && ((m_name != name) ^ negate_name_test)) |
jrose@1145 | 864 | continue; |
jrose@1145 | 865 | if (sig != NULL && m->signature() != sig) |
jrose@1145 | 866 | continue; |
jrose@1145 | 867 | // passed the filters |
jrose@1145 | 868 | if (rskip > 0) { |
jrose@1145 | 869 | --rskip; |
jrose@1145 | 870 | } else if (rfill < rlimit) { |
sspitsyn@4965 | 871 | Handle result(thread, results->obj_at(rfill++)); |
sspitsyn@4965 | 872 | if (!java_lang_invoke_MemberName::is_instance(result())) |
jrose@1145 | 873 | return -99; // caller bug! |
drchase@5732 | 874 | CallInfo info(m); |
drchase@5732 | 875 | oop saved = MethodHandles::init_method_MemberName(result, info); |
sspitsyn@4965 | 876 | if (saved != result()) |
twisti@3969 | 877 | results->obj_at_put(rfill-1, saved); // show saved instance to user |
jrose@1145 | 878 | } else if (++overflow >= overflow_limit) { |
jrose@1145 | 879 | match_flags = 0; break; // got tired of looking at overflow |
jrose@1145 | 880 | } |
jrose@1145 | 881 | } |
jrose@1145 | 882 | } |
jrose@1145 | 883 | |
jrose@1145 | 884 | // return number of elements we at leasted wanted to initialize |
jrose@1145 | 885 | return rfill + overflow; |
jrose@1145 | 886 | } |
sspitsyn@4965 | 887 | |
sspitsyn@4965 | 888 | //------------------------------------------------------------------------------ |
sspitsyn@4965 | 889 | // MemberNameTable |
sspitsyn@4965 | 890 | // |
sspitsyn@4965 | 891 | |
sspitsyn@5178 | 892 | MemberNameTable::MemberNameTable(int methods_cnt) |
sspitsyn@5178 | 893 | : GrowableArray<jweak>(methods_cnt, true) { |
sspitsyn@4965 | 894 | assert_locked_or_safepoint(MemberNameTable_lock); |
sspitsyn@4965 | 895 | } |
sspitsyn@4965 | 896 | |
sspitsyn@4965 | 897 | MemberNameTable::~MemberNameTable() { |
sspitsyn@4965 | 898 | assert_locked_or_safepoint(MemberNameTable_lock); |
sspitsyn@4965 | 899 | int len = this->length(); |
sspitsyn@4965 | 900 | |
sspitsyn@4965 | 901 | for (int idx = 0; idx < len; idx++) { |
sspitsyn@4965 | 902 | jweak ref = this->at(idx); |
sspitsyn@4965 | 903 | JNIHandles::destroy_weak_global(ref); |
sspitsyn@4965 | 904 | } |
sspitsyn@4965 | 905 | } |
sspitsyn@4965 | 906 | |
sspitsyn@5178 | 907 | void MemberNameTable::add_member_name(int index, jweak mem_name_wref) { |
sspitsyn@4965 | 908 | assert_locked_or_safepoint(MemberNameTable_lock); |
sspitsyn@5178 | 909 | this->at_put_grow(index, mem_name_wref); |
sspitsyn@4965 | 910 | } |
sspitsyn@4965 | 911 | |
sspitsyn@5178 | 912 | // Return a member name oop or NULL. |
sspitsyn@5178 | 913 | oop MemberNameTable::get_member_name(int index) { |
sspitsyn@4965 | 914 | assert_locked_or_safepoint(MemberNameTable_lock); |
sspitsyn@4965 | 915 | |
sspitsyn@5178 | 916 | jweak ref = this->at(index); |
sspitsyn@5178 | 917 | oop mem_name = JNIHandles::resolve(ref); |
sspitsyn@5178 | 918 | return mem_name; |
sspitsyn@4965 | 919 | } |
sspitsyn@4965 | 920 | |
sspitsyn@4965 | 921 | #if INCLUDE_JVMTI |
sspitsyn@4965 | 922 | oop MemberNameTable::find_member_name_by_method(Method* old_method) { |
sspitsyn@4965 | 923 | assert_locked_or_safepoint(MemberNameTable_lock); |
sspitsyn@4965 | 924 | oop found = NULL; |
sspitsyn@4965 | 925 | int len = this->length(); |
sspitsyn@4965 | 926 | |
sspitsyn@4965 | 927 | for (int idx = 0; idx < len; idx++) { |
sspitsyn@4965 | 928 | oop mem_name = JNIHandles::resolve(this->at(idx)); |
sspitsyn@4965 | 929 | if (mem_name == NULL) { |
sspitsyn@4965 | 930 | continue; |
sspitsyn@4965 | 931 | } |
sspitsyn@4965 | 932 | Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mem_name); |
sspitsyn@4965 | 933 | if (method == old_method) { |
sspitsyn@4965 | 934 | found = mem_name; |
sspitsyn@4965 | 935 | break; |
sspitsyn@4965 | 936 | } |
sspitsyn@4965 | 937 | } |
sspitsyn@4965 | 938 | return found; |
sspitsyn@4965 | 939 | } |
sspitsyn@4965 | 940 | |
sspitsyn@4965 | 941 | // It is called at safepoint only |
sspitsyn@4965 | 942 | void MemberNameTable::adjust_method_entries(Method** old_methods, Method** new_methods, |
sspitsyn@4965 | 943 | int methods_length, bool *trace_name_printed) { |
sspitsyn@4965 | 944 | assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint"); |
sspitsyn@4965 | 945 | // search the MemberNameTable for uses of either obsolete or EMCP methods |
sspitsyn@4965 | 946 | for (int j = 0; j < methods_length; j++) { |
sspitsyn@4965 | 947 | Method* old_method = old_methods[j]; |
sspitsyn@4965 | 948 | Method* new_method = new_methods[j]; |
sspitsyn@4965 | 949 | oop mem_name = find_member_name_by_method(old_method); |
sspitsyn@4965 | 950 | if (mem_name != NULL) { |
sspitsyn@4965 | 951 | java_lang_invoke_MemberName::adjust_vmtarget(mem_name, new_method); |
sspitsyn@4965 | 952 | |
sspitsyn@4965 | 953 | if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { |
sspitsyn@4965 | 954 | if (!(*trace_name_printed)) { |
sspitsyn@4965 | 955 | // RC_TRACE_MESG macro has an embedded ResourceMark |
sspitsyn@4965 | 956 | RC_TRACE_MESG(("adjust: name=%s", |
sspitsyn@4965 | 957 | old_method->method_holder()->external_name())); |
sspitsyn@4965 | 958 | *trace_name_printed = true; |
sspitsyn@4965 | 959 | } |
sspitsyn@4965 | 960 | // RC_TRACE macro has an embedded ResourceMark |
sspitsyn@4965 | 961 | RC_TRACE(0x00400000, ("MemberName method update: %s(%s)", |
sspitsyn@4965 | 962 | new_method->name()->as_C_string(), |
sspitsyn@4965 | 963 | new_method->signature()->as_C_string())); |
sspitsyn@4965 | 964 | } |
sspitsyn@4965 | 965 | } |
sspitsyn@4965 | 966 | } |
sspitsyn@4965 | 967 | } |
sspitsyn@4965 | 968 | #endif // INCLUDE_JVMTI |
sspitsyn@4965 | 969 | |
jrose@1145 | 970 | // |
twisti@3969 | 971 | // Here are the native methods in java.lang.invoke.MethodHandleNatives |
jrose@1145 | 972 | // They are the private interface between this JVM and the HotSpot-specific |
jrose@1145 | 973 | // Java code that implements JSR 292 method handles. |
jrose@1145 | 974 | // |
jrose@1145 | 975 | // Note: We use a JVM_ENTRY macro to define each of these, for this is the way |
jrose@1145 | 976 | // that intrinsic (non-JNI) native methods are defined in HotSpot. |
jrose@1145 | 977 | // |
coleenp@4037 | 978 | |
jrose@2639 | 979 | JVM_ENTRY(jint, MHN_getConstant(JNIEnv *env, jobject igcls, jint which)) { |
jrose@1145 | 980 | switch (which) { |
never@3105 | 981 | case MethodHandles::GC_COUNT_GWT: |
never@3105 | 982 | #ifdef COMPILER2 |
never@3105 | 983 | return true; |
never@3105 | 984 | #else |
never@3105 | 985 | return false; |
never@3105 | 986 | #endif |
jrose@1145 | 987 | } |
jrose@1145 | 988 | return 0; |
jrose@1145 | 989 | } |
jrose@1145 | 990 | JVM_END |
jrose@1145 | 991 | |
jrose@1145 | 992 | #ifndef PRODUCT |
twisti@3969 | 993 | #define EACH_NAMED_CON(template, requirement) \ |
twisti@3969 | 994 | template(MethodHandles,GC_COUNT_GWT) \ |
jrose@2639 | 995 | template(java_lang_invoke_MemberName,MN_IS_METHOD) \ |
jrose@2639 | 996 | template(java_lang_invoke_MemberName,MN_IS_CONSTRUCTOR) \ |
jrose@2639 | 997 | template(java_lang_invoke_MemberName,MN_IS_FIELD) \ |
jrose@2639 | 998 | template(java_lang_invoke_MemberName,MN_IS_TYPE) \ |
twisti@4866 | 999 | template(java_lang_invoke_MemberName,MN_CALLER_SENSITIVE) \ |
jrose@2639 | 1000 | template(java_lang_invoke_MemberName,MN_SEARCH_SUPERCLASSES) \ |
jrose@2639 | 1001 | template(java_lang_invoke_MemberName,MN_SEARCH_INTERFACES) \ |
twisti@3969 | 1002 | template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_SHIFT) \ |
twisti@3969 | 1003 | template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_MASK) \ |
twisti@3969 | 1004 | template(MethodHandles,GC_LAMBDA_SUPPORT) \ |
jrose@1145 | 1005 | /*end*/ |
jrose@1145 | 1006 | |
twisti@3969 | 1007 | #define IGNORE_REQ(req_expr) /* req_expr */ |
jrose@1145 | 1008 | #define ONE_PLUS(scope,value) 1+ |
twisti@3969 | 1009 | static const int con_value_count = EACH_NAMED_CON(ONE_PLUS, IGNORE_REQ) 0; |
jrose@1145 | 1010 | #define VALUE_COMMA(scope,value) scope::value, |
twisti@3969 | 1011 | static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA, IGNORE_REQ) 0 }; |
jrose@1145 | 1012 | #define STRING_NULL(scope,value) #value "\0" |
twisti@3969 | 1013 | static const char con_names[] = { EACH_NAMED_CON(STRING_NULL, IGNORE_REQ) }; |
twisti@3969 | 1014 | |
twisti@3969 | 1015 | static bool advertise_con_value(int which) { |
twisti@3969 | 1016 | if (which < 0) return false; |
twisti@3969 | 1017 | bool ok = true; |
twisti@3969 | 1018 | int count = 0; |
twisti@3969 | 1019 | #define INC_COUNT(scope,value) \ |
twisti@3969 | 1020 | ++count; |
twisti@3969 | 1021 | #define CHECK_REQ(req_expr) \ |
twisti@3969 | 1022 | if (which < count) return ok; \ |
twisti@3969 | 1023 | ok = (req_expr); |
twisti@3969 | 1024 | EACH_NAMED_CON(INC_COUNT, CHECK_REQ); |
twisti@3969 | 1025 | #undef INC_COUNT |
twisti@3969 | 1026 | #undef CHECK_REQ |
twisti@3969 | 1027 | assert(count == con_value_count, ""); |
twisti@3969 | 1028 | if (which < count) return ok; |
twisti@3969 | 1029 | return false; |
twisti@3969 | 1030 | } |
jrose@1145 | 1031 | |
jrose@1145 | 1032 | #undef ONE_PLUS |
jrose@1145 | 1033 | #undef VALUE_COMMA |
jrose@1145 | 1034 | #undef STRING_NULL |
jrose@1145 | 1035 | #undef EACH_NAMED_CON |
twisti@3969 | 1036 | #endif // PRODUCT |
jrose@1145 | 1037 | |
jrose@2639 | 1038 | JVM_ENTRY(jint, MHN_getNamedCon(JNIEnv *env, jobject igcls, jint which, jobjectArray box_jh)) { |
jrose@1145 | 1039 | #ifndef PRODUCT |
twisti@3969 | 1040 | if (advertise_con_value(which)) { |
twisti@3969 | 1041 | assert(which >= 0 && which < con_value_count, ""); |
jrose@1145 | 1042 | int con = con_values[which]; |
twisti@2806 | 1043 | objArrayHandle box(THREAD, (objArrayOop) JNIHandles::resolve(box_jh)); |
twisti@2806 | 1044 | if (box.not_null() && box->klass() == Universe::objectArrayKlassObj() && box->length() > 0) { |
jrose@1145 | 1045 | const char* str = &con_names[0]; |
jrose@1145 | 1046 | for (int i = 0; i < which; i++) |
jrose@1145 | 1047 | str += strlen(str) + 1; // skip name and null |
twisti@2806 | 1048 | oop name = java_lang_String::create_oop_from_str(str, CHECK_0); // possible safepoint |
jrose@1145 | 1049 | box->obj_at_put(0, name); |
jrose@1145 | 1050 | } |
jrose@1145 | 1051 | return con; |
jrose@1145 | 1052 | } |
jrose@1145 | 1053 | #endif |
jrose@1145 | 1054 | return 0; |
jrose@1145 | 1055 | } |
jrose@1145 | 1056 | JVM_END |
jrose@1145 | 1057 | |
jrose@1145 | 1058 | // void init(MemberName self, AccessibleObject ref) |
jrose@2639 | 1059 | JVM_ENTRY(void, MHN_init_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jobject target_jh)) { |
never@2937 | 1060 | if (mname_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); } |
never@2937 | 1061 | if (target_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "target is null"); } |
jrose@1145 | 1062 | Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
sspitsyn@4965 | 1063 | Handle target(THREAD, JNIHandles::resolve_non_null(target_jh)); |
sspitsyn@4965 | 1064 | MethodHandles::init_MemberName(mname, target); |
jrose@1145 | 1065 | } |
jrose@1145 | 1066 | JVM_END |
jrose@1145 | 1067 | |
jrose@1145 | 1068 | // void expand(MemberName self) |
jrose@2639 | 1069 | JVM_ENTRY(void, MHN_expand_Mem(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
never@2937 | 1070 | if (mname_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); } |
jrose@1145 | 1071 | Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
jrose@1145 | 1072 | MethodHandles::expand_MemberName(mname, 0, CHECK); |
jrose@1145 | 1073 | } |
jrose@1145 | 1074 | JVM_END |
jrose@1145 | 1075 | |
jrose@1145 | 1076 | // void resolve(MemberName self, Class<?> caller) |
twisti@3969 | 1077 | JVM_ENTRY(jobject, MHN_resolve_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jclass caller_jh)) { |
twisti@3969 | 1078 | if (mname_jh == NULL) { THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "mname is null"); } |
jrose@1145 | 1079 | Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
jrose@1862 | 1080 | |
jrose@1862 | 1081 | // The trusted Java code that calls this method should already have performed |
jrose@1862 | 1082 | // access checks on behalf of the given caller. But, we can verify this. |
twisti@3969 | 1083 | if (VerifyMethodHandles && caller_jh != NULL && |
twisti@3969 | 1084 | java_lang_invoke_MemberName::clazz(mname()) != NULL) { |
coleenp@4037 | 1085 | Klass* reference_klass = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); |
twisti@5354 | 1086 | if (reference_klass != NULL && reference_klass->oop_is_objArray()) { |
twisti@5354 | 1087 | reference_klass = ObjArrayKlass::cast(reference_klass)->bottom_klass(); |
twisti@5354 | 1088 | } |
twisti@5354 | 1089 | |
twisti@5354 | 1090 | // Reflection::verify_class_access can only handle instance classes. |
twisti@5354 | 1091 | if (reference_klass != NULL && reference_klass->oop_is_instance()) { |
jrose@1862 | 1092 | // Emulate LinkResolver::check_klass_accessability. |
coleenp@4037 | 1093 | Klass* caller = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(caller_jh)); |
jrose@1862 | 1094 | if (!Reflection::verify_class_access(caller, |
jrose@1862 | 1095 | reference_klass, |
jrose@1862 | 1096 | true)) { |
hseigel@4278 | 1097 | THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), reference_klass->external_name()); |
jrose@1862 | 1098 | } |
jrose@1862 | 1099 | } |
jrose@1862 | 1100 | } |
jrose@1862 | 1101 | |
twisti@3969 | 1102 | Handle resolved = MethodHandles::resolve_MemberName(mname, CHECK_NULL); |
twisti@3969 | 1103 | if (resolved.is_null()) { |
twisti@3969 | 1104 | int flags = java_lang_invoke_MemberName::flags(mname()); |
twisti@3969 | 1105 | int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK; |
twisti@3969 | 1106 | if (!MethodHandles::ref_kind_is_valid(ref_kind)) { |
twisti@3969 | 1107 | THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "obsolete MemberName format"); |
twisti@3969 | 1108 | } |
twisti@3969 | 1109 | if ((flags & ALL_KINDS) == IS_FIELD) { |
twisti@3969 | 1110 | THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), "field resolution failed"); |
twisti@3969 | 1111 | } else if ((flags & ALL_KINDS) == IS_METHOD || |
twisti@3969 | 1112 | (flags & ALL_KINDS) == IS_CONSTRUCTOR) { |
twisti@3969 | 1113 | THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), "method resolution failed"); |
twisti@3969 | 1114 | } else { |
twisti@3969 | 1115 | THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "resolution failed"); |
twisti@3969 | 1116 | } |
twisti@3969 | 1117 | } |
twisti@3969 | 1118 | |
twisti@3969 | 1119 | return JNIHandles::make_local(THREAD, resolved()); |
jrose@1145 | 1120 | } |
jrose@1145 | 1121 | JVM_END |
jrose@1145 | 1122 | |
twisti@3969 | 1123 | static jlong find_member_field_offset(oop mname, bool must_be_static, TRAPS) { |
twisti@3969 | 1124 | if (mname == NULL || |
twisti@3969 | 1125 | java_lang_invoke_MemberName::vmtarget(mname) == NULL) { |
twisti@3969 | 1126 | THROW_MSG_0(vmSymbols::java_lang_InternalError(), "mname not resolved"); |
twisti@3969 | 1127 | } else { |
twisti@3969 | 1128 | int flags = java_lang_invoke_MemberName::flags(mname); |
twisti@3969 | 1129 | if ((flags & IS_FIELD) != 0 && |
twisti@3969 | 1130 | (must_be_static |
twisti@3969 | 1131 | ? (flags & JVM_ACC_STATIC) != 0 |
twisti@3969 | 1132 | : (flags & JVM_ACC_STATIC) == 0)) { |
twisti@3969 | 1133 | int vmindex = java_lang_invoke_MemberName::vmindex(mname); |
twisti@3969 | 1134 | return (jlong) vmindex; |
twisti@3969 | 1135 | } |
twisti@3969 | 1136 | } |
twisti@3969 | 1137 | const char* msg = (must_be_static ? "static field required" : "non-static field required"); |
twisti@3969 | 1138 | THROW_MSG_0(vmSymbols::java_lang_InternalError(), msg); |
twisti@3969 | 1139 | return 0; |
twisti@3969 | 1140 | } |
twisti@3969 | 1141 | |
twisti@3969 | 1142 | JVM_ENTRY(jlong, MHN_objectFieldOffset(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
twisti@3969 | 1143 | return find_member_field_offset(JNIHandles::resolve(mname_jh), false, THREAD); |
twisti@3969 | 1144 | } |
twisti@3969 | 1145 | JVM_END |
twisti@3969 | 1146 | |
twisti@3969 | 1147 | JVM_ENTRY(jlong, MHN_staticFieldOffset(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
twisti@3969 | 1148 | return find_member_field_offset(JNIHandles::resolve(mname_jh), true, THREAD); |
twisti@3969 | 1149 | } |
twisti@3969 | 1150 | JVM_END |
twisti@3969 | 1151 | |
twisti@3969 | 1152 | JVM_ENTRY(jobject, MHN_staticFieldBase(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
twisti@3969 | 1153 | // use the other function to perform sanity checks: |
twisti@3969 | 1154 | jlong ignore = find_member_field_offset(JNIHandles::resolve(mname_jh), true, CHECK_NULL); |
twisti@3969 | 1155 | oop clazz = java_lang_invoke_MemberName::clazz(JNIHandles::resolve_non_null(mname_jh)); |
twisti@3969 | 1156 | return JNIHandles::make_local(THREAD, clazz); |
twisti@3969 | 1157 | } |
twisti@3969 | 1158 | JVM_END |
twisti@3969 | 1159 | |
twisti@3969 | 1160 | JVM_ENTRY(jobject, MHN_getMemberVMInfo(JNIEnv *env, jobject igcls, jobject mname_jh)) { |
twisti@3969 | 1161 | if (mname_jh == NULL) return NULL; |
twisti@3969 | 1162 | Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
twisti@3969 | 1163 | intptr_t vmindex = java_lang_invoke_MemberName::vmindex(mname()); |
coleenp@4037 | 1164 | Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(mname()); |
twisti@3969 | 1165 | objArrayHandle result = oopFactory::new_objArray(SystemDictionary::Object_klass(), 2, CHECK_NULL); |
twisti@3969 | 1166 | jvalue vmindex_value; vmindex_value.j = (long)vmindex; |
twisti@3969 | 1167 | oop x = java_lang_boxing_object::create(T_LONG, &vmindex_value, CHECK_NULL); |
twisti@3969 | 1168 | result->obj_at_put(0, x); |
twisti@3969 | 1169 | x = NULL; |
coleenp@4037 | 1170 | if (vmtarget == NULL) { |
coleenp@4037 | 1171 | x = NULL; |
twisti@3969 | 1172 | } else if (vmtarget->is_klass()) { |
hseigel@4278 | 1173 | x = ((Klass*) vmtarget)->java_mirror(); |
coleenp@4037 | 1174 | } else if (vmtarget->is_method()) { |
twisti@3969 | 1175 | Handle mname2 = MethodHandles::new_MemberName(CHECK_NULL); |
drchase@5732 | 1176 | CallInfo info((Method*)vmtarget); |
drchase@5732 | 1177 | x = MethodHandles::init_method_MemberName(mname2, info); |
twisti@3969 | 1178 | } |
twisti@3969 | 1179 | result->obj_at_put(1, x); |
twisti@3969 | 1180 | return JNIHandles::make_local(env, result()); |
twisti@3969 | 1181 | } |
twisti@3969 | 1182 | JVM_END |
twisti@3969 | 1183 | |
twisti@3969 | 1184 | |
twisti@3969 | 1185 | |
jrose@1145 | 1186 | // static native int getMembers(Class<?> defc, String matchName, String matchSig, |
jrose@1145 | 1187 | // int matchFlags, Class<?> caller, int skip, MemberName[] results); |
jrose@2639 | 1188 | JVM_ENTRY(jint, MHN_getMembers(JNIEnv *env, jobject igcls, |
jrose@1145 | 1189 | jclass clazz_jh, jstring name_jh, jstring sig_jh, |
jrose@1145 | 1190 | int mflags, jclass caller_jh, jint skip, jobjectArray results_jh)) { |
jrose@1145 | 1191 | if (clazz_jh == NULL || results_jh == NULL) return -1; |
coleenp@4037 | 1192 | KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz_jh))); |
jrose@1145 | 1193 | |
twisti@2806 | 1194 | objArrayHandle results(THREAD, (objArrayOop) JNIHandles::resolve(results_jh)); |
twisti@2806 | 1195 | if (results.is_null() || !results->is_objArray()) return -1; |
jrose@1145 | 1196 | |
coleenp@2497 | 1197 | TempNewSymbol name = NULL; |
coleenp@2497 | 1198 | TempNewSymbol sig = NULL; |
jrose@1145 | 1199 | if (name_jh != NULL) { |
jrose@1145 | 1200 | name = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(name_jh)); |
jrose@1145 | 1201 | if (name == NULL) return 0; // a match is not possible |
jrose@1145 | 1202 | } |
jrose@1145 | 1203 | if (sig_jh != NULL) { |
jrose@1145 | 1204 | sig = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(sig_jh)); |
jrose@1145 | 1205 | if (sig == NULL) return 0; // a match is not possible |
jrose@1145 | 1206 | } |
jrose@1145 | 1207 | |
twisti@2806 | 1208 | KlassHandle caller; |
jrose@1145 | 1209 | if (caller_jh != NULL) { |
jrose@1145 | 1210 | oop caller_oop = JNIHandles::resolve_non_null(caller_jh); |
jrose@1145 | 1211 | if (!java_lang_Class::is_instance(caller_oop)) return -1; |
coleenp@4037 | 1212 | caller = KlassHandle(THREAD, java_lang_Class::as_Klass(caller_oop)); |
jrose@1145 | 1213 | } |
jrose@1145 | 1214 | |
twisti@2806 | 1215 | if (name != NULL && sig != NULL && results.not_null()) { |
jrose@1145 | 1216 | // try a direct resolve |
jrose@1145 | 1217 | // %%% TO DO |
jrose@1145 | 1218 | } |
jrose@1145 | 1219 | |
sspitsyn@4965 | 1220 | int res = MethodHandles::find_MemberNames(k, name, sig, mflags, |
sspitsyn@4965 | 1221 | caller, skip, results); |
jrose@1145 | 1222 | // TO DO: expand at least some of the MemberNames, to avoid massive callbacks |
jrose@1145 | 1223 | return res; |
jrose@1145 | 1224 | } |
jrose@1145 | 1225 | JVM_END |
jrose@1145 | 1226 | |
twisti@3131 | 1227 | JVM_ENTRY(void, MHN_setCallSiteTargetNormal(JNIEnv* env, jobject igcls, jobject call_site_jh, jobject target_jh)) { |
twisti@3239 | 1228 | Handle call_site(THREAD, JNIHandles::resolve_non_null(call_site_jh)); |
twisti@3239 | 1229 | Handle target (THREAD, JNIHandles::resolve(target_jh)); |
twisti@3131 | 1230 | { |
twisti@3131 | 1231 | // Walk all nmethods depending on this call site. |
twisti@3131 | 1232 | MutexLocker mu(Compile_lock, thread); |
twisti@3131 | 1233 | Universe::flush_dependents_on(call_site, target); |
twisti@4354 | 1234 | java_lang_invoke_CallSite::set_target(call_site(), target()); |
twisti@3131 | 1235 | } |
twisti@3131 | 1236 | } |
twisti@3131 | 1237 | JVM_END |
twisti@3131 | 1238 | |
twisti@3131 | 1239 | JVM_ENTRY(void, MHN_setCallSiteTargetVolatile(JNIEnv* env, jobject igcls, jobject call_site_jh, jobject target_jh)) { |
twisti@3239 | 1240 | Handle call_site(THREAD, JNIHandles::resolve_non_null(call_site_jh)); |
twisti@3239 | 1241 | Handle target (THREAD, JNIHandles::resolve(target_jh)); |
twisti@3131 | 1242 | { |
twisti@3131 | 1243 | // Walk all nmethods depending on this call site. |
twisti@3131 | 1244 | MutexLocker mu(Compile_lock, thread); |
twisti@3131 | 1245 | Universe::flush_dependents_on(call_site, target); |
twisti@4354 | 1246 | java_lang_invoke_CallSite::set_target_volatile(call_site(), target()); |
twisti@3131 | 1247 | } |
twisti@3131 | 1248 | } |
twisti@3131 | 1249 | JVM_END |
twisti@3131 | 1250 | |
twisti@5108 | 1251 | /** |
twisti@5108 | 1252 | * Throws a java/lang/UnsupportedOperationException unconditionally. |
twisti@5108 | 1253 | * This is required by the specification of MethodHandle.invoke if |
twisti@5108 | 1254 | * invoked directly. |
twisti@5108 | 1255 | */ |
twisti@5108 | 1256 | JVM_ENTRY(jobject, MH_invoke_UOE(JNIEnv* env, jobject mh, jobjectArray args)) { |
twisti@5108 | 1257 | THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "MethodHandle.invoke cannot be invoked reflectively"); |
twisti@5108 | 1258 | return NULL; |
twisti@5108 | 1259 | } |
twisti@5108 | 1260 | JVM_END |
twisti@5108 | 1261 | |
twisti@5108 | 1262 | /** |
twisti@5108 | 1263 | * Throws a java/lang/UnsupportedOperationException unconditionally. |
twisti@5108 | 1264 | * This is required by the specification of MethodHandle.invokeExact if |
twisti@5108 | 1265 | * invoked directly. |
twisti@5108 | 1266 | */ |
twisti@5108 | 1267 | JVM_ENTRY(jobject, MH_invokeExact_UOE(JNIEnv* env, jobject mh, jobjectArray args)) { |
twisti@5108 | 1268 | THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "MethodHandle.invokeExact cannot be invoked reflectively"); |
twisti@5108 | 1269 | return NULL; |
twisti@5108 | 1270 | } |
twisti@5108 | 1271 | JVM_END |
twisti@5108 | 1272 | |
jrose@1145 | 1273 | /// JVM_RegisterMethodHandleMethods |
jrose@1145 | 1274 | |
twisti@3131 | 1275 | #undef CS // Solaris builds complain |
twisti@3131 | 1276 | |
jrose@1145 | 1277 | #define LANG "Ljava/lang/" |
jrose@2742 | 1278 | #define JLINV "Ljava/lang/invoke/" |
jrose@1145 | 1279 | |
jrose@1145 | 1280 | #define OBJ LANG"Object;" |
jrose@1145 | 1281 | #define CLS LANG"Class;" |
jrose@1145 | 1282 | #define STRG LANG"String;" |
twisti@3131 | 1283 | #define CS JLINV"CallSite;" |
jrose@2742 | 1284 | #define MT JLINV"MethodType;" |
jrose@2742 | 1285 | #define MH JLINV"MethodHandle;" |
jrose@2742 | 1286 | #define MEM JLINV"MemberName;" |
jrose@1145 | 1287 | |
jrose@1145 | 1288 | #define CC (char*) /*cast a literal from (const char*)*/ |
jrose@1145 | 1289 | #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) |
jrose@1145 | 1290 | |
twisti@3131 | 1291 | // These are the native methods on java.lang.invoke.MethodHandleNatives. |
twisti@5108 | 1292 | static JNINativeMethod MHN_methods[] = { |
twisti@3131 | 1293 | {CC"init", CC"("MEM""OBJ")V", FN_PTR(MHN_init_Mem)}, |
twisti@3131 | 1294 | {CC"expand", CC"("MEM")V", FN_PTR(MHN_expand_Mem)}, |
twisti@3969 | 1295 | {CC"resolve", CC"("MEM""CLS")"MEM, FN_PTR(MHN_resolve_Mem)}, |
twisti@3131 | 1296 | {CC"getConstant", CC"(I)I", FN_PTR(MHN_getConstant)}, |
jrose@1145 | 1297 | // static native int getNamedCon(int which, Object[] name) |
twisti@3131 | 1298 | {CC"getNamedCon", CC"(I["OBJ")I", FN_PTR(MHN_getNamedCon)}, |
jrose@1145 | 1299 | // static native int getMembers(Class<?> defc, String matchName, String matchSig, |
jrose@1145 | 1300 | // int matchFlags, Class<?> caller, int skip, MemberName[] results); |
twisti@3969 | 1301 | {CC"getMembers", CC"("CLS""STRG""STRG"I"CLS"I["MEM")I", FN_PTR(MHN_getMembers)}, |
twisti@3969 | 1302 | {CC"objectFieldOffset", CC"("MEM")J", FN_PTR(MHN_objectFieldOffset)}, |
twisti@3131 | 1303 | {CC"setCallSiteTargetNormal", CC"("CS""MH")V", FN_PTR(MHN_setCallSiteTargetNormal)}, |
twisti@3969 | 1304 | {CC"setCallSiteTargetVolatile", CC"("CS""MH")V", FN_PTR(MHN_setCallSiteTargetVolatile)}, |
twisti@3969 | 1305 | {CC"staticFieldOffset", CC"("MEM")J", FN_PTR(MHN_staticFieldOffset)}, |
twisti@3969 | 1306 | {CC"staticFieldBase", CC"("MEM")"OBJ, FN_PTR(MHN_staticFieldBase)}, |
twisti@3969 | 1307 | {CC"getMemberVMInfo", CC"("MEM")"OBJ, FN_PTR(MHN_getMemberVMInfo)} |
jrose@1145 | 1308 | }; |
jrose@1145 | 1309 | |
twisti@5108 | 1310 | static JNINativeMethod MH_methods[] = { |
twisti@5108 | 1311 | // UnsupportedOperationException throwers |
twisti@5108 | 1312 | {CC"invoke", CC"(["OBJ")"OBJ, FN_PTR(MH_invoke_UOE)}, |
twisti@5108 | 1313 | {CC"invokeExact", CC"(["OBJ")"OBJ, FN_PTR(MH_invokeExact_UOE)} |
twisti@5108 | 1314 | }; |
jrose@1145 | 1315 | |
twisti@5108 | 1316 | /** |
twisti@5108 | 1317 | * Helper method to register native methods. |
twisti@5108 | 1318 | */ |
twisti@5108 | 1319 | static bool register_natives(JNIEnv* env, jclass clazz, const JNINativeMethod* methods, jint nMethods) { |
twisti@5108 | 1320 | int status = env->RegisterNatives(clazz, methods, nMethods); |
twisti@5108 | 1321 | if (status != JNI_OK || env->ExceptionOccurred()) { |
twisti@5108 | 1322 | warning("JSR 292 method handle code is mismatched to this JVM. Disabling support."); |
twisti@5108 | 1323 | env->ExceptionClear(); |
twisti@5108 | 1324 | return false; |
twisti@5108 | 1325 | } |
twisti@5108 | 1326 | return true; |
twisti@5108 | 1327 | } |
twisti@5108 | 1328 | |
twisti@5108 | 1329 | /** |
twisti@5108 | 1330 | * This one function is exported, used by NativeLookup. |
twisti@5108 | 1331 | */ |
jrose@1145 | 1332 | JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) { |
twisti@2698 | 1333 | if (!EnableInvokeDynamic) { |
twisti@2698 | 1334 | warning("JSR 292 is disabled in this JVM. Use -XX:+UnlockDiagnosticVMOptions -XX:+EnableInvokeDynamic to enable."); |
jrose@1145 | 1335 | return; // bind nothing |
jrose@1145 | 1336 | } |
jrose@1145 | 1337 | |
twisti@3131 | 1338 | assert(!MethodHandles::enabled(), "must not be enabled"); |
jrose@1474 | 1339 | bool enable_MH = true; |
jrose@1474 | 1340 | |
twisti@3969 | 1341 | jclass MH_class = NULL; |
twisti@3969 | 1342 | if (SystemDictionary::MethodHandle_klass() == NULL) { |
twisti@3969 | 1343 | enable_MH = false; |
twisti@3969 | 1344 | } else { |
hseigel@4278 | 1345 | oop mirror = SystemDictionary::MethodHandle_klass()->java_mirror(); |
twisti@3969 | 1346 | MH_class = (jclass) JNIHandles::make_local(env, mirror); |
twisti@3969 | 1347 | } |
twisti@3969 | 1348 | |
twisti@3969 | 1349 | if (enable_MH) { |
jrose@1145 | 1350 | ThreadToNativeFromVM ttnfv(thread); |
twisti@3969 | 1351 | |
twisti@5108 | 1352 | if (enable_MH) { |
twisti@5108 | 1353 | enable_MH = register_natives(env, MHN_class, MHN_methods, sizeof(MHN_methods)/sizeof(JNINativeMethod)); |
twisti@5108 | 1354 | } |
twisti@5108 | 1355 | if (enable_MH) { |
twisti@5108 | 1356 | enable_MH = register_natives(env, MH_class, MH_methods, sizeof(MH_methods)/sizeof(JNINativeMethod)); |
jrose@1145 | 1357 | } |
jrose@1145 | 1358 | } |
jrose@1161 | 1359 | |
twisti@3969 | 1360 | if (TraceInvokeDynamic) { |
twisti@3969 | 1361 | tty->print_cr("MethodHandle support loaded (using LambdaForms)"); |
jrose@1474 | 1362 | } |
jrose@1474 | 1363 | |
jrose@1474 | 1364 | if (enable_MH) { |
twisti@2436 | 1365 | MethodHandles::generate_adapters(); |
jrose@1474 | 1366 | MethodHandles::set_enabled(true); |
jrose@1474 | 1367 | } |
jrose@1145 | 1368 | } |
jrose@1145 | 1369 | JVM_END |