/* * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_PRIMS_METHODHANDLES_HPP #define SHARE_VM_PRIMS_METHODHANDLES_HPP #include "classfile/javaClasses.hpp" #include "classfile/vmSymbols.hpp" #include "runtime/frame.inline.hpp" #include "runtime/globals.hpp" #include "runtime/interfaceSupport.hpp" class MacroAssembler; class Label; class MethodHandles: AllStatic { // JVM support for MethodHandle, MethodType, and related types // in java.lang.invoke and sun.invoke. // See also javaClasses for layouts java_lang_invoke_Method{Handle,Type,Type::Form}. public: public: static bool enabled() { return _enabled; } static void set_enabled(bool z); private: static bool _enabled; // Adapters. static MethodHandlesAdapterBlob* _adapter_code; // utility functions for reifying names and types static oop field_name_or_null(Symbol* s); static oop field_signature_type_or_null(Symbol* s); public: // working with member names static Handle resolve_MemberName(Handle mname, KlassHandle caller, TRAPS); // compute vmtarget/vmindex from name/type static void expand_MemberName(Handle mname, int suppress, TRAPS); // expand defc/name/type if missing static Handle new_MemberName(TRAPS); // must be followed by init_MemberName static oop init_MemberName(Handle mname_h, Handle target_h); // compute vmtarget/vmindex from target static oop init_field_MemberName(Handle mname_h, fieldDescriptor& fd, bool is_setter = false); static oop init_method_MemberName(Handle mname_h, CallInfo& info); static int method_ref_kind(Method* m, bool do_dispatch_if_possible = true); static int find_MemberNames(KlassHandle k, Symbol* name, Symbol* sig, int mflags, KlassHandle caller, int skip, objArrayHandle results); // bit values for suppress argument to expand_MemberName: enum { _suppress_defc = 1, _suppress_name = 2, _suppress_type = 4 }; // Generate MethodHandles adapters. static void generate_adapters(); // Called from MethodHandlesAdapterGenerator. static address generate_method_handle_interpreter_entry(MacroAssembler* _masm, vmIntrinsics::ID iid); static void generate_method_handle_dispatch(MacroAssembler* _masm, vmIntrinsics::ID iid, Register receiver_reg, Register member_reg, bool for_compiler_entry); // Queries static bool is_signature_polymorphic(vmIntrinsics::ID iid) { return (iid >= vmIntrinsics::FIRST_MH_SIG_POLY && iid <= vmIntrinsics::LAST_MH_SIG_POLY); } static bool is_signature_polymorphic_intrinsic(vmIntrinsics::ID iid) { assert(is_signature_polymorphic(iid), ""); // Most sig-poly methods are intrinsics which do not require an // appeal to Java for adapter code. return (iid != vmIntrinsics::_invokeGeneric); } static bool is_signature_polymorphic_static(vmIntrinsics::ID iid) { assert(is_signature_polymorphic(iid), ""); return (iid >= vmIntrinsics::FIRST_MH_STATIC && iid <= vmIntrinsics::LAST_MH_SIG_POLY); } static bool has_member_arg(vmIntrinsics::ID iid) { assert(is_signature_polymorphic(iid), ""); return (iid >= vmIntrinsics::_linkToVirtual && iid <= vmIntrinsics::_linkToInterface); } static bool has_member_arg(Symbol* klass, Symbol* name) { if ((klass == vmSymbols::java_lang_invoke_MethodHandle()) && is_signature_polymorphic_name(name)) { vmIntrinsics::ID iid = signature_polymorphic_name_id(name); return has_member_arg(iid); } return false; } static Symbol* signature_polymorphic_intrinsic_name(vmIntrinsics::ID iid); static int signature_polymorphic_intrinsic_ref_kind(vmIntrinsics::ID iid); static vmIntrinsics::ID signature_polymorphic_name_id(Klass* klass, Symbol* name); static vmIntrinsics::ID signature_polymorphic_name_id(Symbol* name); static bool is_signature_polymorphic_name(Symbol* name) { return signature_polymorphic_name_id(name) != vmIntrinsics::_none; } static bool is_method_handle_invoke_name(Klass* klass, Symbol* name); static bool is_signature_polymorphic_name(Klass* klass, Symbol* name) { return signature_polymorphic_name_id(klass, name) != vmIntrinsics::_none; } enum { // format of query to getConstant: GC_COUNT_GWT = 4, GC_LAMBDA_SUPPORT = 5 }; static int get_named_constant(int which, Handle name_box, TRAPS); public: static Symbol* lookup_signature(oop type_str, bool polymorphic, TRAPS); // use TempNewSymbol static Symbol* lookup_basic_type_signature(Symbol* sig, bool keep_last_arg, TRAPS); // use TempNewSymbol static Symbol* lookup_basic_type_signature(Symbol* sig, TRAPS) { return lookup_basic_type_signature(sig, false, THREAD); } static bool is_basic_type_signature(Symbol* sig); static Symbol* lookup_method_type(Symbol* msig, Handle mtype, TRAPS); static void print_as_method_type_on(outputStream* st, Symbol* sig) { print_as_basic_type_signature_on(st, sig, true, true); } static void print_as_basic_type_signature_on(outputStream* st, Symbol* sig, bool keep_arrays = false, bool keep_basic_names = false); // decoding CONSTANT_MethodHandle constants enum { JVM_REF_MIN = JVM_REF_getField, JVM_REF_MAX = JVM_REF_invokeInterface }; static bool ref_kind_is_valid(int ref_kind) { return (ref_kind >= JVM_REF_MIN && ref_kind <= JVM_REF_MAX); } static bool ref_kind_is_field(int ref_kind) { assert(ref_kind_is_valid(ref_kind), ""); return (ref_kind <= JVM_REF_putStatic); } static bool ref_kind_is_getter(int ref_kind) { assert(ref_kind_is_valid(ref_kind), ""); return (ref_kind <= JVM_REF_getStatic); } static bool ref_kind_is_setter(int ref_kind) { return ref_kind_is_field(ref_kind) && !ref_kind_is_getter(ref_kind); } static bool ref_kind_is_method(int ref_kind) { return !ref_kind_is_field(ref_kind) && (ref_kind != JVM_REF_newInvokeSpecial); } static bool ref_kind_has_receiver(int ref_kind) { assert(ref_kind_is_valid(ref_kind), ""); return (ref_kind & 1) != 0; } static bool ref_kind_is_static(int ref_kind) { return !ref_kind_has_receiver(ref_kind) && (ref_kind != JVM_REF_newInvokeSpecial); } static bool ref_kind_does_dispatch(int ref_kind) { return (ref_kind == JVM_REF_invokeVirtual || ref_kind == JVM_REF_invokeInterface); } #ifdef TARGET_ARCH_x86 # include "methodHandles_x86.hpp" #endif #ifdef TARGET_ARCH_sparc # include "methodHandles_sparc.hpp" #endif #ifdef TARGET_ARCH_zero # include "methodHandles_zero.hpp" #endif #ifdef TARGET_ARCH_arm # include "methodHandles_arm.hpp" #endif #ifdef TARGET_ARCH_ppc # include "methodHandles_ppc.hpp" #endif // Tracing static void trace_method_handle(MacroAssembler* _masm, const char* adaptername) PRODUCT_RETURN; static void trace_method_handle_interpreter_entry(MacroAssembler* _masm, vmIntrinsics::ID iid) { if (TraceMethodHandles) { const char* name = vmIntrinsics::name_at(iid); if (*name == '_') name += 1; const size_t len = strlen(name) + 50; char* qname = NEW_C_HEAP_ARRAY(char, len, mtInternal); const char* suffix = ""; if (is_signature_polymorphic(iid)) { if (is_signature_polymorphic_static(iid)) suffix = "/static"; else suffix = "/private"; } jio_snprintf(qname, len, "MethodHandle::interpreter_entry::%s%s", name, suffix); trace_method_handle(_masm, qname); // Note: Don't free the allocated char array because it's used // during runtime. } } }; //------------------------------------------------------------------------------ // MethodHandlesAdapterGenerator // class MethodHandlesAdapterGenerator : public StubCodeGenerator { public: MethodHandlesAdapterGenerator(CodeBuffer* code) : StubCodeGenerator(code, PrintMethodHandleStubs) {} void generate(); }; //------------------------------------------------------------------------------ // MemberNameTable // class MemberNameTable : public GrowableArray { public: MemberNameTable(int methods_cnt); ~MemberNameTable(); void add_member_name(int index, jweak mem_name_ref); oop get_member_name(int index); #if INCLUDE_JVMTI public: // RedefineClasses() API support: // If a MemberName refers to old_method then update it // to refer to new_method. void adjust_method_entries(Method** old_methods, Method** new_methods, int methods_length, bool *trace_name_printed); private: oop find_member_name_by_method(Method* old_method); #endif // INCLUDE_JVMTI }; #endif // SHARE_VM_PRIMS_METHODHANDLES_HPP