| /* |
| * Copyright (c) 2008, 2011, 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 MethodHandleEntry; |
| |
| class MethodHandles: AllStatic { |
| // JVM support for MethodHandle, MethodType, and related types |
| // in java.dyn and java.dyn.hotspot. |
| // See also javaClasses for layouts java_dyn_Method{Handle,Type,Type::Form}. |
| public: |
| enum EntryKind { |
| _raise_exception, // stub for error generation from other stubs |
| _invokestatic_mh, // how a MH emulates invokestatic |
| _invokespecial_mh, // ditto for the other invokes... |
| _invokevirtual_mh, |
| _invokeinterface_mh, |
| _bound_ref_mh, // reference argument is bound |
| _bound_int_mh, // int argument is bound (via an Integer or Float) |
| _bound_long_mh, // long argument is bound (via a Long or Double) |
| _bound_ref_direct_mh, // same as above, with direct linkage to methodOop |
| _bound_int_direct_mh, |
| _bound_long_direct_mh, |
| |
| _adapter_mh_first, // adapter sequence goes here... |
| _adapter_retype_only = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_RETYPE_ONLY, |
| _adapter_retype_raw = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW, |
| _adapter_check_cast = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_CHECK_CAST, |
| _adapter_prim_to_prim = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_PRIM_TO_PRIM, |
| _adapter_ref_to_prim = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_REF_TO_PRIM, |
| _adapter_prim_to_ref = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_PRIM_TO_REF, |
| _adapter_swap_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_SWAP_ARGS, |
| _adapter_rot_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_ROT_ARGS, |
| _adapter_dup_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_DUP_ARGS, |
| _adapter_drop_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_DROP_ARGS, |
| _adapter_collect_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_COLLECT_ARGS, |
| _adapter_spread_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_SPREAD_ARGS, |
| _adapter_flyby = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_FLYBY, |
| _adapter_ricochet = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_RICOCHET, |
| _adapter_mh_last = _adapter_mh_first + sun_dyn_AdapterMethodHandle::CONV_OP_LIMIT - 1, |
| |
| // Optimized adapter types |
| |
| // argument list reordering |
| _adapter_opt_swap_1, |
| _adapter_opt_swap_2, |
| _adapter_opt_rot_1_up, |
| _adapter_opt_rot_1_down, |
| _adapter_opt_rot_2_up, |
| _adapter_opt_rot_2_down, |
| // primitive single to single: |
| _adapter_opt_i2i, // i2c, i2z, i2b, i2s |
| // primitive double to single: |
| _adapter_opt_l2i, |
| _adapter_opt_d2f, |
| // primitive single to double: |
| _adapter_opt_i2l, |
| _adapter_opt_f2d, |
| // conversion between floating point and integer type is handled by Java |
| |
| // reference to primitive: |
| _adapter_opt_unboxi, |
| _adapter_opt_unboxl, |
| |
| // spreading (array length cases 0, 1, >=2) |
| _adapter_opt_spread_0, |
| _adapter_opt_spread_1, |
| _adapter_opt_spread_more, |
| |
| _EK_LIMIT, |
| _EK_FIRST = 0 |
| }; |
| |
| public: |
| static bool enabled() { return _enabled; } |
| static void set_enabled(bool z); |
| |
| private: |
| enum { // import sun_dyn_AdapterMethodHandle::CONV_OP_* |
| CONV_OP_LIMIT = sun_dyn_AdapterMethodHandle::CONV_OP_LIMIT, |
| CONV_OP_MASK = sun_dyn_AdapterMethodHandle::CONV_OP_MASK, |
| CONV_VMINFO_MASK = sun_dyn_AdapterMethodHandle::CONV_VMINFO_MASK, |
| CONV_VMINFO_SHIFT = sun_dyn_AdapterMethodHandle::CONV_VMINFO_SHIFT, |
| CONV_OP_SHIFT = sun_dyn_AdapterMethodHandle::CONV_OP_SHIFT, |
| CONV_DEST_TYPE_SHIFT = sun_dyn_AdapterMethodHandle::CONV_DEST_TYPE_SHIFT, |
| CONV_SRC_TYPE_SHIFT = sun_dyn_AdapterMethodHandle::CONV_SRC_TYPE_SHIFT, |
| CONV_STACK_MOVE_SHIFT = sun_dyn_AdapterMethodHandle::CONV_STACK_MOVE_SHIFT, |
| CONV_STACK_MOVE_MASK = sun_dyn_AdapterMethodHandle::CONV_STACK_MOVE_MASK |
| }; |
| |
| static bool _enabled; |
| static MethodHandleEntry* _entries[_EK_LIMIT]; |
| static const char* _entry_names[_EK_LIMIT+1]; |
| static jobject _raise_exception_method; |
| |
| // Adapters. |
| static MethodHandlesAdapterBlob* _adapter_code; |
| static int _adapter_code_size; |
| |
| static bool ek_valid(EntryKind ek) { return (uint)ek < (uint)_EK_LIMIT; } |
| static bool conv_op_valid(int op) { return (uint)op < (uint)CONV_OP_LIMIT; } |
| |
| public: |
| static bool have_entry(EntryKind ek) { return ek_valid(ek) && _entries[ek] != NULL; } |
| static MethodHandleEntry* entry(EntryKind ek) { assert(ek_valid(ek), "initialized"); |
| return _entries[ek]; } |
| static const char* entry_name(EntryKind ek) { assert(ek_valid(ek), "oob"); |
| return _entry_names[ek]; } |
| static EntryKind adapter_entry_kind(int op) { assert(conv_op_valid(op), "oob"); |
| return EntryKind(_adapter_mh_first + op); } |
| |
| static void init_entry(EntryKind ek, MethodHandleEntry* me) { |
| assert(ek_valid(ek), "oob"); |
| assert(_entries[ek] == NULL, "no double initialization"); |
| _entries[ek] = me; |
| } |
| |
| // Some adapter helper functions. |
| static void get_ek_bound_mh_info(EntryKind ek, BasicType& arg_type, int& arg_mask, int& arg_slots) { |
| switch (ek) { |
| case _bound_int_mh : // fall-thru |
| case _bound_int_direct_mh : arg_type = T_INT; arg_mask = _INSERT_INT_MASK; break; |
| case _bound_long_mh : // fall-thru |
| case _bound_long_direct_mh: arg_type = T_LONG; arg_mask = _INSERT_LONG_MASK; break; |
| case _bound_ref_mh : // fall-thru |
| case _bound_ref_direct_mh : arg_type = T_OBJECT; arg_mask = _INSERT_REF_MASK; break; |
| default: ShouldNotReachHere(); |
| } |
| arg_slots = type2size[arg_type]; |
| } |
| |
| static void get_ek_adapter_opt_swap_rot_info(EntryKind ek, int& swap_bytes, int& rotate) { |
| int swap_slots = 0; |
| switch (ek) { |
| case _adapter_opt_swap_1: swap_slots = 1; rotate = 0; break; |
| case _adapter_opt_swap_2: swap_slots = 2; rotate = 0; break; |
| case _adapter_opt_rot_1_up: swap_slots = 1; rotate = 1; break; |
| case _adapter_opt_rot_1_down: swap_slots = 1; rotate = -1; break; |
| case _adapter_opt_rot_2_up: swap_slots = 2; rotate = 1; break; |
| case _adapter_opt_rot_2_down: swap_slots = 2; rotate = -1; break; |
| default: ShouldNotReachHere(); |
| } |
| // Return the size of the stack slots to move in bytes. |
| swap_bytes = swap_slots * Interpreter::stackElementSize; |
| } |
| |
| static int get_ek_adapter_opt_spread_info(EntryKind ek) { |
| switch (ek) { |
| case _adapter_opt_spread_0: return 0; |
| case _adapter_opt_spread_1: return 1; |
| default : return -1; |
| } |
| } |
| |
| static methodOop raise_exception_method() { |
| oop rem = JNIHandles::resolve(_raise_exception_method); |
| assert(rem == NULL || rem->is_method(), ""); |
| return (methodOop) rem; |
| } |
| static void set_raise_exception_method(methodOop rem) { |
| assert(_raise_exception_method == NULL, ""); |
| _raise_exception_method = JNIHandles::make_global(Handle(rem)); |
| } |
| |
| static jint adapter_conversion(int conv_op, BasicType src, BasicType dest, |
| int stack_move = 0, int vminfo = 0) { |
| assert(conv_op_valid(conv_op), "oob"); |
| jint conv = ((conv_op << CONV_OP_SHIFT) |
| | (src << CONV_SRC_TYPE_SHIFT) |
| | (dest << CONV_DEST_TYPE_SHIFT) |
| | (stack_move << CONV_STACK_MOVE_SHIFT) |
| | (vminfo << CONV_VMINFO_SHIFT) |
| ); |
| assert(adapter_conversion_op(conv) == conv_op, "decode conv_op"); |
| assert(adapter_conversion_src_type(conv) == src, "decode src"); |
| assert(adapter_conversion_dest_type(conv) == dest, "decode dest"); |
| assert(adapter_conversion_stack_move(conv) == stack_move, "decode stack_move"); |
| assert(adapter_conversion_vminfo(conv) == vminfo, "decode vminfo"); |
| return conv; |
| } |
| static int adapter_conversion_op(jint conv) { |
| return ((conv >> CONV_OP_SHIFT) & 0xF); |
| } |
| static BasicType adapter_conversion_src_type(jint conv) { |
| return (BasicType)((conv >> CONV_SRC_TYPE_SHIFT) & 0xF); |
| } |
| static BasicType adapter_conversion_dest_type(jint conv) { |
| return (BasicType)((conv >> CONV_DEST_TYPE_SHIFT) & 0xF); |
| } |
| static int adapter_conversion_stack_move(jint conv) { |
| return (conv >> CONV_STACK_MOVE_SHIFT); |
| } |
| static int adapter_conversion_vminfo(jint conv) { |
| return (conv >> CONV_VMINFO_SHIFT) & CONV_VMINFO_MASK; |
| } |
| |
| // Bit mask of conversion_op values. May vary by platform. |
| static int adapter_conversion_ops_supported_mask(); |
| |
| // Offset in words that the interpreter stack pointer moves when an argument is pushed. |
| // The stack_move value must always be a multiple of this. |
| static int stack_move_unit() { |
| return frame::interpreter_frame_expression_stack_direction() * Interpreter::stackElementWords; |
| } |
| |
| enum { CONV_VMINFO_SIGN_FLAG = 0x80 }; |
| // Shift values for prim-to-prim conversions. |
| static int adapter_prim_to_prim_subword_vminfo(BasicType dest) { |
| if (dest == T_BOOLEAN) return (BitsPerInt - 1); // boolean is 1 bit |
| if (dest == T_CHAR) return (BitsPerInt - BitsPerShort); |
| if (dest == T_BYTE) return (BitsPerInt - BitsPerByte ) | CONV_VMINFO_SIGN_FLAG; |
| if (dest == T_SHORT) return (BitsPerInt - BitsPerShort) | CONV_VMINFO_SIGN_FLAG; |
| return 0; // case T_INT |
| } |
| // Shift values for unboxing a primitive. |
| static int adapter_unbox_subword_vminfo(BasicType dest) { |
| if (dest == T_BOOLEAN) return (BitsPerInt - BitsPerByte ); // implemented as 1 byte |
| if (dest == T_CHAR) return (BitsPerInt - BitsPerShort); |
| if (dest == T_BYTE) return (BitsPerInt - BitsPerByte ) | CONV_VMINFO_SIGN_FLAG; |
| if (dest == T_SHORT) return (BitsPerInt - BitsPerShort) | CONV_VMINFO_SIGN_FLAG; |
| return 0; // case T_INT |
| } |
| // Here is the transformation the i2i adapter must perform: |
| static int truncate_subword_from_vminfo(jint value, int vminfo) { |
| jint tem = value << vminfo; |
| if ((vminfo & CONV_VMINFO_SIGN_FLAG) != 0) { |
| return (jint)tem >> vminfo; |
| } else { |
| return (juint)tem >> vminfo; |
| } |
| } |
| |
| static inline address from_compiled_entry(EntryKind ek); |
| static inline address from_interpreted_entry(EntryKind ek); |
| |
| // helpers for decode_method. |
| static methodOop decode_methodOop(methodOop m, int& decode_flags_result); |
| static methodOop decode_vmtarget(oop vmtarget, int vmindex, oop mtype, klassOop& receiver_limit_result, int& decode_flags_result); |
| static methodOop decode_MemberName(oop mname, klassOop& receiver_limit_result, int& decode_flags_result); |
| static methodOop decode_MethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); |
| static methodOop decode_DirectMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); |
| static methodOop decode_BoundMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); |
| static methodOop decode_AdapterMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); |
| |
| // Find out how many stack slots an mh pushes or pops. |
| // The result is *not* reported as a multiple of stack_move_unit(); |
| // It is a signed net number of pushes (a difference in vmslots). |
| // To compare with a stack_move value, first multiply by stack_move_unit(). |
| static int decode_MethodHandle_stack_pushes(oop mh); |
| |
| public: |
| // working with member names |
| static void resolve_MemberName(Handle mname, 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 void init_MemberName(oop mname_oop, oop target); // compute vmtarget/vmindex from target |
| static void init_MemberName(oop mname_oop, methodOop m, bool do_dispatch = true); |
| static void init_MemberName(oop mname_oop, klassOop field_holder, AccessFlags mods, int offset); |
| static int find_MemberNames(klassOop k, Symbol* name, Symbol* sig, |
| int mflags, klassOop caller, |
| int skip, objArrayOop 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 InterpreterGenerator and MethodHandlesAdapterGenerator. |
| static address generate_method_handle_interpreter_entry(MacroAssembler* _masm); |
| static void generate_method_handle_stub(MacroAssembler* _masm, EntryKind ek); |
| |
| // argument list parsing |
| static int argument_slot(oop method_type, int arg); |
| static int argument_slot_count(oop method_type) { return argument_slot(method_type, -1); } |
| static int argument_slot_to_argnum(oop method_type, int argslot); |
| |
| // Runtime support |
| enum { // bit-encoded flags from decode_method or decode_vmref |
| _dmf_has_receiver = 0x01, // target method has leading reference argument |
| _dmf_does_dispatch = 0x02, // method handle performs virtual or interface dispatch |
| _dmf_from_interface = 0x04, // peforms interface dispatch |
| _DMF_DIRECT_MASK = (_dmf_from_interface*2 - _dmf_has_receiver), |
| _dmf_binds_method = 0x08, |
| _dmf_binds_argument = 0x10, |
| _DMF_BOUND_MASK = (_dmf_binds_argument*2 - _dmf_binds_method), |
| _dmf_adapter_lsb = 0x20, |
| _DMF_ADAPTER_MASK = (_dmf_adapter_lsb << CONV_OP_LIMIT) - _dmf_adapter_lsb |
| }; |
| static methodOop decode_method(oop x, klassOop& receiver_limit_result, int& decode_flags_result); |
| enum { |
| // format of query to getConstant: |
| GC_JVM_PUSH_LIMIT = 0, |
| GC_JVM_STACK_MOVE_UNIT = 1, |
| GC_CONV_OP_IMPLEMENTED_MASK = 2, |
| |
| // format of result from getTarget / encode_target: |
| ETF_HANDLE_OR_METHOD_NAME = 0, // all available data (immediate MH or method) |
| ETF_DIRECT_HANDLE = 1, // ultimate method handle (will be a DMH, may be self) |
| ETF_METHOD_NAME = 2, // ultimate method as MemberName |
| ETF_REFLECT_METHOD = 3 // ultimate method as java.lang.reflect object (sans refClass) |
| }; |
| static int get_named_constant(int which, Handle name_box, TRAPS); |
| static oop encode_target(Handle mh, int format, TRAPS); // report vmtarget (to Java code) |
| static bool class_cast_needed(klassOop src, klassOop dst); |
| |
| static instanceKlassHandle resolve_instance_klass(oop java_mirror_oop, TRAPS); |
| static instanceKlassHandle resolve_instance_klass(jclass java_mirror_jh, TRAPS) { |
| return resolve_instance_klass(JNIHandles::resolve(java_mirror_jh), THREAD); |
| } |
| |
| private: |
| // These checkers operate on a pair of whole MethodTypes: |
| static const char* check_method_type_change(oop src_mtype, int src_beg, int src_end, |
| int insert_argnum, oop insert_type, |
| int change_argnum, oop change_type, |
| int delete_argnum, |
| oop dst_mtype, int dst_beg, int dst_end, |
| bool raw = false); |
| static const char* check_method_type_insertion(oop src_mtype, |
| int insert_argnum, oop insert_type, |
| oop dst_mtype) { |
| oop no_ref = NULL; |
| return check_method_type_change(src_mtype, 0, -1, |
| insert_argnum, insert_type, |
| -1, no_ref, -1, dst_mtype, 0, -1); |
| } |
| static const char* check_method_type_conversion(oop src_mtype, |
| int change_argnum, oop change_type, |
| oop dst_mtype) { |
| oop no_ref = NULL; |
| return check_method_type_change(src_mtype, 0, -1, -1, no_ref, |
| change_argnum, change_type, |
| -1, dst_mtype, 0, -1); |
| } |
| static const char* check_method_type_passthrough(oop src_mtype, oop dst_mtype, bool raw) { |
| oop no_ref = NULL; |
| return check_method_type_change(src_mtype, 0, -1, |
| -1, no_ref, -1, no_ref, -1, |
| dst_mtype, 0, -1, raw); |
| } |
| |
| // These checkers operate on pairs of argument or return types: |
| static const char* check_argument_type_change(BasicType src_type, klassOop src_klass, |
| BasicType dst_type, klassOop dst_klass, |
| int argnum, bool raw = false); |
| |
| static const char* check_argument_type_change(oop src_type, oop dst_type, |
| int argnum, bool raw = false) { |
| klassOop src_klass = NULL, dst_klass = NULL; |
| BasicType src_bt = java_lang_Class::as_BasicType(src_type, &src_klass); |
| BasicType dst_bt = java_lang_Class::as_BasicType(dst_type, &dst_klass); |
| return check_argument_type_change(src_bt, src_klass, |
| dst_bt, dst_klass, argnum, raw); |
| } |
| |
| static const char* check_return_type_change(oop src_type, oop dst_type, bool raw = false) { |
| return check_argument_type_change(src_type, dst_type, -1, raw); |
| } |
| |
| static const char* check_return_type_change(BasicType src_type, klassOop src_klass, |
| BasicType dst_type, klassOop dst_klass) { |
| return check_argument_type_change(src_type, src_klass, dst_type, dst_klass, -1); |
| } |
| |
| static const char* check_method_receiver(methodOop m, klassOop passed_recv_type); |
| |
| // These verifiers can block, and will throw an error if the checking fails: |
| static void verify_vmslots(Handle mh, TRAPS); |
| static void verify_vmargslot(Handle mh, int argnum, int argslot, TRAPS); |
| |
| static void verify_method_type(methodHandle m, Handle mtype, |
| bool has_bound_oop, |
| KlassHandle bound_oop_type, |
| TRAPS); |
| |
| static void verify_method_signature(methodHandle m, Handle mtype, |
| int first_ptype_pos, |
| KlassHandle insert_ptype, TRAPS); |
| |
| static void verify_DirectMethodHandle(Handle mh, methodHandle m, TRAPS); |
| static void verify_BoundMethodHandle(Handle mh, Handle target, int argnum, |
| bool direct_to_method, TRAPS); |
| static void verify_BoundMethodHandle_with_receiver(Handle mh, methodHandle m, TRAPS); |
| static void verify_AdapterMethodHandle(Handle mh, int argnum, TRAPS); |
| |
| public: |
| |
| // Fill in the fields of a DirectMethodHandle mh. (MH.type must be pre-filled.) |
| static void init_DirectMethodHandle(Handle mh, methodHandle method, bool do_dispatch, TRAPS); |
| |
| // Fill in the fields of a BoundMethodHandle mh. (MH.type, BMH.argument must be pre-filled.) |
| static void init_BoundMethodHandle(Handle mh, Handle target, int argnum, TRAPS); |
| static void init_BoundMethodHandle_with_receiver(Handle mh, |
| methodHandle original_m, |
| KlassHandle receiver_limit, |
| int decode_flags, |
| TRAPS); |
| |
| // Fill in the fields of an AdapterMethodHandle mh. (MH.type must be pre-filled.) |
| static void init_AdapterMethodHandle(Handle mh, Handle target, int argnum, TRAPS); |
| |
| #ifdef ASSERT |
| static bool spot_check_entry_names(); |
| #endif |
| |
| private: |
| static methodHandle dispatch_decoded_method(methodHandle m, |
| KlassHandle receiver_limit, |
| int decode_flags, |
| KlassHandle receiver_klass, |
| TRAPS); |
| |
| static bool same_basic_type_for_arguments(BasicType src, BasicType dst, |
| bool raw = false, |
| bool for_return = false); |
| static bool same_basic_type_for_returns(BasicType src, BasicType dst, bool raw = false) { |
| return same_basic_type_for_arguments(src, dst, raw, true); |
| } |
| |
| enum { // arg_mask values |
| _INSERT_NO_MASK = -1, |
| _INSERT_REF_MASK = 0, |
| _INSERT_INT_MASK = 1, |
| _INSERT_LONG_MASK = 3 |
| }; |
| static void insert_arg_slots(MacroAssembler* _masm, |
| RegisterOrConstant arg_slots, |
| int arg_mask, |
| Register argslot_reg, |
| Register temp_reg, Register temp2_reg, Register temp3_reg = noreg); |
| |
| static void remove_arg_slots(MacroAssembler* _masm, |
| RegisterOrConstant arg_slots, |
| Register argslot_reg, |
| Register temp_reg, Register temp2_reg, Register temp3_reg = noreg); |
| |
| static void trace_method_handle(MacroAssembler* _masm, const char* adaptername) PRODUCT_RETURN; |
| |
| static Symbol* convert_to_signature(oop type_str, bool polymorphic, TRAPS); |
| }; |
| |
| |
| // Access methods for the "entry" field of a java.dyn.MethodHandle. |
| // The field is primarily a jump target for compiled calls. |
| // However, we squirrel away some nice pointers for other uses, |
| // just before the jump target. |
| // Aspects of a method handle entry: |
| // - from_compiled_entry - stub used when compiled code calls the MH |
| // - from_interpreted_entry - stub used when the interpreter calls the MH |
| // - type_checking_entry - stub for runtime casting between MHForm siblings (NYI) |
| class MethodHandleEntry { |
| public: |
| class Data { |
| friend class MethodHandleEntry; |
| size_t _total_size; // size including Data and code stub |
| MethodHandleEntry* _type_checking_entry; |
| address _from_interpreted_entry; |
| MethodHandleEntry* method_entry() { return (MethodHandleEntry*)(this + 1); } |
| }; |
| |
| Data* data() { return (Data*)this - 1; } |
| |
| address start_address() { return (address) data(); } |
| address end_address() { return start_address() + data()->_total_size; } |
| |
| address from_compiled_entry() { return (address) this; } |
| |
| address from_interpreted_entry() { return data()->_from_interpreted_entry; } |
| void set_from_interpreted_entry(address e) { data()->_from_interpreted_entry = e; } |
| |
| MethodHandleEntry* type_checking_entry() { return data()->_type_checking_entry; } |
| void set_type_checking_entry(MethodHandleEntry* e) { data()->_type_checking_entry = e; } |
| |
| void set_end_address(address end_addr) { |
| size_t total_size = end_addr - start_address(); |
| assert(total_size > 0 && total_size < 0x1000, "reasonable end address"); |
| data()->_total_size = total_size; |
| } |
| |
| // Compiler support: |
| static int from_interpreted_entry_offset_in_bytes() { |
| return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); |
| } |
| static int type_checking_entry_offset_in_bytes() { |
| return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); |
| } |
| |
| static address start_compiled_entry(MacroAssembler* _masm, |
| address interpreted_entry = NULL); |
| static MethodHandleEntry* finish_compiled_entry(MacroAssembler* masm, address start_addr); |
| }; |
| |
| address MethodHandles::from_compiled_entry(EntryKind ek) { return entry(ek)->from_compiled_entry(); } |
| address MethodHandles::from_interpreted_entry(EntryKind ek) { return entry(ek)->from_interpreted_entry(); } |
| |
| |
| //------------------------------------------------------------------------------ |
| // MethodHandlesAdapterGenerator |
| // |
| class MethodHandlesAdapterGenerator : public StubCodeGenerator { |
| public: |
| MethodHandlesAdapterGenerator(CodeBuffer* code) : StubCodeGenerator(code) {} |
| |
| void generate(); |
| }; |
| |
| #endif // SHARE_VM_PRIMS_METHODHANDLES_HPP |
