author | coleenp |
Tue, 31 Oct 2017 11:55:09 -0400 | |
changeset 47765 | b7c7428eaab9 |
parent 47216 | 71c04702a3d5 |
child 48157 | 7c4d43c26352 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008, 2017, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_VM_PRIMS_METHODHANDLES_HPP |
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#define SHARE_VM_PRIMS_METHODHANDLES_HPP |
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#include "classfile/javaClasses.hpp" |
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#include "classfile/vmSymbols.hpp" |
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#include "runtime/frame.inline.hpp" |
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#include "runtime/globals.hpp" |
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#include "runtime/interfaceSupport.hpp" |
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#include "utilities/macros.hpp" |
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#ifdef ZERO |
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# include "entry_zero.hpp" |
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#endif |
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class MacroAssembler; |
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class Label; |
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class MethodHandles: AllStatic { |
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// JVM support for MethodHandle, MethodType, and related types |
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// in java.lang.invoke and sun.invoke. |
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// See also javaClasses for layouts java_lang_invoke_Method{Handle,Type,Type::Form}. |
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public: |
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public: |
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static bool enabled() { return _enabled; } |
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static void set_enabled(bool z); |
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private: |
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static bool _enabled; |
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// Adapters. |
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static MethodHandlesAdapterBlob* _adapter_code; |
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// utility functions for reifying names and types |
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static oop field_name_or_null(Symbol* s); |
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static oop field_signature_type_or_null(Symbol* s); |
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public: |
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// working with member names |
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static Handle resolve_MemberName(Handle mname, Klass* caller, TRAPS); // compute vmtarget/vmindex from name/type |
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static void expand_MemberName(Handle mname, int suppress, TRAPS); // expand defc/name/type if missing |
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static oop init_MemberName(Handle mname_h, Handle target_h, TRAPS); // compute vmtarget/vmindex from target |
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static oop init_field_MemberName(Handle mname_h, fieldDescriptor& fd, bool is_setter = false); |
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static oop init_method_MemberName(Handle mname_h, CallInfo& info); |
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static int method_ref_kind(Method* m, bool do_dispatch_if_possible = true); |
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static int find_MemberNames(Klass* k, Symbol* name, Symbol* sig, |
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int mflags, Klass* caller, |
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int skip, objArrayHandle results, TRAPS); |
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// bit values for suppress argument to expand_MemberName: |
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enum { _suppress_defc = 1, _suppress_name = 2, _suppress_type = 4 }; |
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// CallSite support |
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static void add_dependent_nmethod(oop call_site, nmethod* nm); |
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static void remove_dependent_nmethod(oop call_site, nmethod* nm); |
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static void flush_dependent_nmethods(Handle call_site, Handle target); |
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// Generate MethodHandles adapters. |
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static void generate_adapters(); |
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// Called from MethodHandlesAdapterGenerator. |
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static address generate_method_handle_interpreter_entry(MacroAssembler* _masm, vmIntrinsics::ID iid); |
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static void generate_method_handle_dispatch(MacroAssembler* _masm, |
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vmIntrinsics::ID iid, |
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Register receiver_reg, |
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Register member_reg, |
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bool for_compiler_entry); |
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// Queries |
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static bool is_signature_polymorphic(vmIntrinsics::ID iid) { |
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return (iid >= vmIntrinsics::FIRST_MH_SIG_POLY && |
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iid <= vmIntrinsics::LAST_MH_SIG_POLY); |
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} |
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static bool is_signature_polymorphic_method(Method* m) { |
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return is_signature_polymorphic(m->intrinsic_id()); |
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} |
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static bool is_signature_polymorphic_intrinsic(vmIntrinsics::ID iid) { |
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assert(is_signature_polymorphic(iid), ""); |
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// Most sig-poly methods are intrinsics which do not require an |
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// appeal to Java for adapter code. |
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return (iid != vmIntrinsics::_invokeGeneric); |
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} |
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static bool is_signature_polymorphic_static(vmIntrinsics::ID iid) { |
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assert(is_signature_polymorphic(iid), ""); |
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return (iid >= vmIntrinsics::FIRST_MH_STATIC && |
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iid <= vmIntrinsics::LAST_MH_SIG_POLY); |
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} |
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static bool has_member_arg(vmIntrinsics::ID iid) { |
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assert(is_signature_polymorphic(iid), ""); |
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return (iid >= vmIntrinsics::_linkToVirtual && |
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iid <= vmIntrinsics::_linkToInterface); |
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} |
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static bool has_member_arg(Symbol* klass, Symbol* name) { |
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if ((klass == vmSymbols::java_lang_invoke_MethodHandle() || |
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klass == vmSymbols::java_lang_invoke_VarHandle()) && |
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is_signature_polymorphic_name(name)) { |
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vmIntrinsics::ID iid = signature_polymorphic_name_id(name); |
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return has_member_arg(iid); |
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} |
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return false; |
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} |
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static Symbol* signature_polymorphic_intrinsic_name(vmIntrinsics::ID iid); |
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static int signature_polymorphic_intrinsic_ref_kind(vmIntrinsics::ID iid); |
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static vmIntrinsics::ID signature_polymorphic_name_id(Klass* klass, Symbol* name); |
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static vmIntrinsics::ID signature_polymorphic_name_id(Symbol* name); |
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static bool is_signature_polymorphic_name(Symbol* name) { |
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return signature_polymorphic_name_id(name) != vmIntrinsics::_none; |
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} |
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static bool is_method_handle_invoke_name(Klass* klass, Symbol* name); |
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static bool is_signature_polymorphic_name(Klass* klass, Symbol* name) { |
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return signature_polymorphic_name_id(klass, name) != vmIntrinsics::_none; |
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} |
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static Bytecodes::Code signature_polymorphic_intrinsic_bytecode(vmIntrinsics::ID id); |
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static int get_named_constant(int which, Handle name_box, TRAPS); |
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public: |
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static Symbol* lookup_signature(oop type_str, bool polymorphic, TRAPS); // use TempNewSymbol |
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static Symbol* lookup_basic_type_signature(Symbol* sig, bool keep_last_arg, TRAPS); // use TempNewSymbol |
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static Symbol* lookup_basic_type_signature(Symbol* sig, TRAPS) { |
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return lookup_basic_type_signature(sig, false, THREAD); |
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} |
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static bool is_basic_type_signature(Symbol* sig); |
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static Symbol* lookup_method_type(Symbol* msig, Handle mtype, TRAPS); |
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static void print_as_method_type_on(outputStream* st, Symbol* sig) { |
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print_as_basic_type_signature_on(st, sig, true, true); |
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} |
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static void print_as_basic_type_signature_on(outputStream* st, Symbol* sig, bool keep_arrays = false, bool keep_basic_names = false); |
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// decoding CONSTANT_MethodHandle constants |
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enum { JVM_REF_MIN = JVM_REF_getField, JVM_REF_MAX = JVM_REF_invokeInterface }; |
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static bool ref_kind_is_valid(int ref_kind) { |
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return (ref_kind >= JVM_REF_MIN && ref_kind <= JVM_REF_MAX); |
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} |
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static bool ref_kind_is_field(int ref_kind) { |
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assert(ref_kind_is_valid(ref_kind), ""); |
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return (ref_kind <= JVM_REF_putStatic); |
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} |
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static bool ref_kind_is_getter(int ref_kind) { |
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assert(ref_kind_is_valid(ref_kind), ""); |
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return (ref_kind <= JVM_REF_getStatic); |
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} |
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static bool ref_kind_is_setter(int ref_kind) { |
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return ref_kind_is_field(ref_kind) && !ref_kind_is_getter(ref_kind); |
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} |
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static bool ref_kind_is_method(int ref_kind) { |
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return !ref_kind_is_field(ref_kind) && (ref_kind != JVM_REF_newInvokeSpecial); |
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} |
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static bool ref_kind_has_receiver(int ref_kind) { |
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assert(ref_kind_is_valid(ref_kind), ""); |
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return (ref_kind & 1) != 0; |
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} |
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static bool ref_kind_is_static(int ref_kind) { |
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return !ref_kind_has_receiver(ref_kind) && (ref_kind != JVM_REF_newInvokeSpecial); |
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} |
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static bool ref_kind_does_dispatch(int ref_kind) { |
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return (ref_kind == JVM_REF_invokeVirtual || |
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ref_kind == JVM_REF_invokeInterface); |
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} |
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#include CPU_HEADER(methodHandles) |
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// Tracing |
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static void trace_method_handle(MacroAssembler* _masm, const char* adaptername) PRODUCT_RETURN; |
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static void trace_method_handle_interpreter_entry(MacroAssembler* _masm, vmIntrinsics::ID iid) { |
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if (TraceMethodHandles) { |
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const char* name = vmIntrinsics::name_at(iid); |
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if (*name == '_') name += 1; |
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const size_t len = strlen(name) + 50; |
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char* qname = NEW_C_HEAP_ARRAY(char, len, mtInternal); |
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const char* suffix = ""; |
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if (is_signature_polymorphic(iid)) { |
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if (is_signature_polymorphic_static(iid)) |
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suffix = "/static"; |
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else |
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suffix = "/private"; |
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} |
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jio_snprintf(qname, len, "MethodHandle::interpreter_entry::%s%s", name, suffix); |
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trace_method_handle(_masm, qname); |
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// Note: Don't free the allocated char array because it's used |
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// during runtime. |
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} |
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} |
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}; |
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//------------------------------------------------------------------------------ |
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// MethodHandlesAdapterGenerator |
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// |
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class MethodHandlesAdapterGenerator : public StubCodeGenerator { |
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public: |
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MethodHandlesAdapterGenerator(CodeBuffer* code) : StubCodeGenerator(code, PrintMethodHandleStubs) {} |
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void generate(); |
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}; |
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#endif // SHARE_VM_PRIMS_METHODHANDLES_HPP |