jrose@1145: /* jrose@1145: * Copyright 2008-2009 Sun Microsystems, Inc. All Rights Reserved. jrose@1145: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. jrose@1145: * jrose@1145: * This code is free software; you can redistribute it and/or modify it jrose@1145: * under the terms of the GNU General Public License version 2 only, as jrose@1145: * published by the Free Software Foundation. jrose@1145: * jrose@1145: * This code is distributed in the hope that it will be useful, but WITHOUT jrose@1145: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or jrose@1145: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License jrose@1145: * version 2 for more details (a copy is included in the LICENSE file that jrose@1145: * accompanied this code). jrose@1145: * jrose@1145: * You should have received a copy of the GNU General Public License version jrose@1145: * 2 along with this work; if not, write to the Free Software Foundation, jrose@1145: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. jrose@1145: * jrose@1145: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, jrose@1145: * CA 95054 USA or visit www.sun.com if you need additional information or jrose@1145: * have any questions. jrose@1145: * jrose@1145: */ jrose@1145: jrose@1145: class MacroAssembler; jrose@1145: class Label; jrose@1145: class MethodHandleEntry; jrose@1145: jrose@1145: class MethodHandles: AllStatic { jrose@1145: // JVM support for MethodHandle, MethodType, and related types jrose@1145: // in java.dyn and java.dyn.hotspot. jrose@1145: // See also javaClasses for layouts java_dyn_Method{Handle,Type,Type::Form}. jrose@1145: public: jrose@1145: enum EntryKind { jrose@1474: _raise_exception, // stub for error generation from other stubs jrose@1145: _invokestatic_mh, // how a MH emulates invokestatic jrose@1145: _invokespecial_mh, // ditto for the other invokes... jrose@1145: _invokevirtual_mh, jrose@1145: _invokeinterface_mh, jrose@1145: _bound_ref_mh, // reference argument is bound jrose@1145: _bound_int_mh, // int argument is bound (via an Integer or Float) jrose@1145: _bound_long_mh, // long argument is bound (via a Long or Double) jrose@1145: _bound_ref_direct_mh, // same as above, with direct linkage to methodOop jrose@1145: _bound_int_direct_mh, jrose@1145: _bound_long_direct_mh, jrose@1145: jrose@1145: _adapter_mh_first, // adapter sequence goes here... jrose@1145: _adapter_retype_only = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_RETYPE_ONLY, jrose@1474: _adapter_retype_raw = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW, jrose@1145: _adapter_check_cast = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_CHECK_CAST, jrose@1145: _adapter_prim_to_prim = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_PRIM_TO_PRIM, jrose@1145: _adapter_ref_to_prim = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_REF_TO_PRIM, jrose@1145: _adapter_prim_to_ref = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_PRIM_TO_REF, jrose@1145: _adapter_swap_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_SWAP_ARGS, jrose@1145: _adapter_rot_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_ROT_ARGS, jrose@1145: _adapter_dup_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_DUP_ARGS, jrose@1145: _adapter_drop_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_DROP_ARGS, jrose@1145: _adapter_collect_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_COLLECT_ARGS, jrose@1145: _adapter_spread_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_SPREAD_ARGS, jrose@1145: _adapter_flyby = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_FLYBY, jrose@1145: _adapter_ricochet = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_RICOCHET, jrose@1145: _adapter_mh_last = _adapter_mh_first + sun_dyn_AdapterMethodHandle::CONV_OP_LIMIT - 1, jrose@1145: jrose@1145: // Optimized adapter types jrose@1145: jrose@1145: // argument list reordering jrose@1145: _adapter_opt_swap_1, jrose@1145: _adapter_opt_swap_2, jrose@1145: _adapter_opt_rot_1_up, jrose@1145: _adapter_opt_rot_1_down, jrose@1145: _adapter_opt_rot_2_up, jrose@1145: _adapter_opt_rot_2_down, jrose@1145: // primitive single to single: jrose@1145: _adapter_opt_i2i, // i2c, i2z, i2b, i2s jrose@1145: // primitive double to single: jrose@1145: _adapter_opt_l2i, jrose@1145: _adapter_opt_d2f, jrose@1145: // primitive single to double: jrose@1145: _adapter_opt_i2l, jrose@1145: _adapter_opt_f2d, jrose@1145: // conversion between floating point and integer type is handled by Java jrose@1145: jrose@1145: // reference to primitive: jrose@1145: _adapter_opt_unboxi, jrose@1145: _adapter_opt_unboxl, jrose@1145: jrose@1145: // spreading (array length cases 0, 1, >=2) jrose@1145: _adapter_opt_spread_0, jrose@1145: _adapter_opt_spread_1, jrose@1145: _adapter_opt_spread_more, jrose@1145: jrose@1145: _EK_LIMIT, jrose@1145: _EK_FIRST = 0 jrose@1145: }; jrose@1145: jrose@1145: public: jrose@1145: static bool enabled() { return _enabled; } jrose@1145: static void set_enabled(bool z); jrose@1145: jrose@1145: private: jrose@1145: enum { // import sun_dyn_AdapterMethodHandle::CONV_OP_* jrose@1145: CONV_OP_LIMIT = sun_dyn_AdapterMethodHandle::CONV_OP_LIMIT, jrose@1145: CONV_OP_MASK = sun_dyn_AdapterMethodHandle::CONV_OP_MASK, jrose@1145: CONV_VMINFO_MASK = sun_dyn_AdapterMethodHandle::CONV_VMINFO_MASK, jrose@1145: CONV_VMINFO_SHIFT = sun_dyn_AdapterMethodHandle::CONV_VMINFO_SHIFT, jrose@1145: CONV_OP_SHIFT = sun_dyn_AdapterMethodHandle::CONV_OP_SHIFT, jrose@1145: CONV_DEST_TYPE_SHIFT = sun_dyn_AdapterMethodHandle::CONV_DEST_TYPE_SHIFT, jrose@1145: CONV_SRC_TYPE_SHIFT = sun_dyn_AdapterMethodHandle::CONV_SRC_TYPE_SHIFT, jrose@1145: CONV_STACK_MOVE_SHIFT = sun_dyn_AdapterMethodHandle::CONV_STACK_MOVE_SHIFT, jrose@1145: CONV_STACK_MOVE_MASK = sun_dyn_AdapterMethodHandle::CONV_STACK_MOVE_MASK jrose@1145: }; jrose@1145: jrose@1145: static bool _enabled; jrose@1145: static MethodHandleEntry* _entries[_EK_LIMIT]; jrose@1145: static const char* _entry_names[_EK_LIMIT+1]; jrose@1474: static jobject _raise_exception_method; jrose@1474: jrose@1145: static bool ek_valid(EntryKind ek) { return (uint)ek < (uint)_EK_LIMIT; } jrose@1145: static bool conv_op_valid(int op) { return (uint)op < (uint)CONV_OP_LIMIT; } jrose@1145: jrose@1145: public: jrose@1145: static bool have_entry(EntryKind ek) { return ek_valid(ek) && _entries[ek] != NULL; } jrose@1145: static MethodHandleEntry* entry(EntryKind ek) { assert(ek_valid(ek), "initialized"); jrose@1145: return _entries[ek]; } jrose@1145: static const char* entry_name(EntryKind ek) { assert(ek_valid(ek), "oob"); jrose@1145: return _entry_names[ek]; } jrose@1145: static EntryKind adapter_entry_kind(int op) { assert(conv_op_valid(op), "oob"); jrose@1145: return EntryKind(_adapter_mh_first + op); } jrose@1145: jrose@1145: static void init_entry(EntryKind ek, MethodHandleEntry* me) { jrose@1145: assert(ek_valid(ek), "oob"); jrose@1145: assert(_entries[ek] == NULL, "no double initialization"); jrose@1145: _entries[ek] = me; jrose@1145: } jrose@1145: jrose@1474: static methodOop raise_exception_method() { jrose@1474: oop rem = JNIHandles::resolve(_raise_exception_method); jrose@1474: assert(rem == NULL || rem->is_method(), ""); jrose@1474: return (methodOop) rem; jrose@1474: } jrose@1474: static void set_raise_exception_method(methodOop rem) { jrose@1474: assert(_raise_exception_method == NULL, ""); jrose@1474: _raise_exception_method = JNIHandles::make_global(Handle(rem)); jrose@1474: } jrose@1474: jrose@1145: static jint adapter_conversion(int conv_op, BasicType src, BasicType dest, jrose@1145: int stack_move = 0, int vminfo = 0) { jrose@1145: assert(conv_op_valid(conv_op), "oob"); jrose@1145: jint conv = ((conv_op << CONV_OP_SHIFT) jrose@1145: | (src << CONV_SRC_TYPE_SHIFT) jrose@1145: | (dest << CONV_DEST_TYPE_SHIFT) jrose@1145: | (stack_move << CONV_STACK_MOVE_SHIFT) jrose@1145: | (vminfo << CONV_VMINFO_SHIFT) jrose@1145: ); jrose@1145: assert(adapter_conversion_op(conv) == conv_op, "decode conv_op"); jrose@1145: assert(adapter_conversion_src_type(conv) == src, "decode src"); jrose@1145: assert(adapter_conversion_dest_type(conv) == dest, "decode dest"); jrose@1145: assert(adapter_conversion_stack_move(conv) == stack_move, "decode stack_move"); jrose@1145: assert(adapter_conversion_vminfo(conv) == vminfo, "decode vminfo"); jrose@1145: return conv; jrose@1145: } jrose@1145: static int adapter_conversion_op(jint conv) { jrose@1145: return ((conv >> CONV_OP_SHIFT) & 0xF); jrose@1145: } jrose@1145: static BasicType adapter_conversion_src_type(jint conv) { jrose@1145: return (BasicType)((conv >> CONV_SRC_TYPE_SHIFT) & 0xF); jrose@1145: } jrose@1145: static BasicType adapter_conversion_dest_type(jint conv) { jrose@1145: return (BasicType)((conv >> CONV_DEST_TYPE_SHIFT) & 0xF); jrose@1145: } jrose@1145: static int adapter_conversion_stack_move(jint conv) { jrose@1145: return (conv >> CONV_STACK_MOVE_SHIFT); jrose@1145: } jrose@1145: static int adapter_conversion_vminfo(jint conv) { jrose@1145: return (conv >> CONV_VMINFO_SHIFT) & CONV_VMINFO_MASK; jrose@1145: } jrose@1145: jrose@1145: // Offset in words that the interpreter stack pointer moves when an argument is pushed. jrose@1145: // The stack_move value must always be a multiple of this. jrose@1145: static int stack_move_unit() { jrose@1145: return frame::interpreter_frame_expression_stack_direction() * Interpreter::stackElementWords(); jrose@1145: } jrose@1145: jrose@1145: enum { CONV_VMINFO_SIGN_FLAG = 0x80 }; jrose@1145: static int adapter_subword_vminfo(BasicType dest) { jrose@1145: if (dest == T_BOOLEAN) return (BitsPerInt - 1); jrose@1145: if (dest == T_CHAR) return (BitsPerInt - 16); jrose@1145: if (dest == T_BYTE) return (BitsPerInt - 8) | CONV_VMINFO_SIGN_FLAG; jrose@1145: if (dest == T_SHORT) return (BitsPerInt - 16) | CONV_VMINFO_SIGN_FLAG; jrose@1145: return 0; // case T_INT jrose@1145: } jrose@1145: // Here is the transformation the i2i adapter must perform: jrose@1145: static int truncate_subword_from_vminfo(jint value, int vminfo) { jrose@1145: jint tem = value << vminfo; jrose@1145: if ((vminfo & CONV_VMINFO_SIGN_FLAG) != 0) { jrose@1145: return (jint)tem >> vminfo; jrose@1145: } else { jrose@1145: return (juint)tem >> vminfo; jrose@1145: } jrose@1145: } jrose@1145: jrose@1145: static inline address from_compiled_entry(EntryKind ek); jrose@1145: static inline address from_interpreted_entry(EntryKind ek); jrose@1145: jrose@1145: // helpers for decode_method. jrose@1145: static methodOop decode_methodOop(methodOop m, int& decode_flags_result); jrose@1145: static methodOop decode_vmtarget(oop vmtarget, int vmindex, oop mtype, klassOop& receiver_limit_result, int& decode_flags_result); jrose@1145: static methodOop decode_MemberName(oop mname, klassOop& receiver_limit_result, int& decode_flags_result); jrose@1145: static methodOop decode_MethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); jrose@1145: static methodOop decode_DirectMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); jrose@1145: static methodOop decode_BoundMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); jrose@1145: static methodOop decode_AdapterMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); jrose@1145: jrose@1145: // Find out how many stack slots an mh pushes or pops. jrose@1145: // The result is *not* reported as a multiple of stack_move_unit(); jrose@1145: // It is a signed net number of pushes (a difference in vmslots). jrose@1145: // To compare with a stack_move value, first multiply by stack_move_unit(). jrose@1145: static int decode_MethodHandle_stack_pushes(oop mh); jrose@1145: jrose@1145: public: jrose@1145: // working with member names jrose@1145: static void resolve_MemberName(Handle mname, TRAPS); // compute vmtarget/vmindex from name/type jrose@1145: static void expand_MemberName(Handle mname, int suppress, TRAPS); // expand defc/name/type if missing jrose@1145: static void init_MemberName(oop mname_oop, oop target); // compute vmtarget/vmindex from target jrose@1145: static void init_MemberName(oop mname_oop, methodOop m, bool do_dispatch); jrose@1145: static void init_MemberName(oop mname_oop, klassOop field_holder, AccessFlags mods, int offset); jrose@1145: static int find_MemberNames(klassOop k, symbolOop name, symbolOop sig, jrose@1145: int mflags, klassOop caller, jrose@1145: int skip, objArrayOop results); jrose@1145: // bit values for suppress argument to expand_MemberName: jrose@1145: enum { _suppress_defc = 1, _suppress_name = 2, _suppress_type = 4 }; jrose@1145: jrose@1145: // called from InterpreterGenerator and StubGenerator jrose@1145: static address generate_method_handle_interpreter_entry(MacroAssembler* _masm); jrose@1145: static void generate_method_handle_stub(MacroAssembler* _masm, EntryKind ek); jrose@1145: jrose@1145: // argument list parsing jrose@1145: static int argument_slot(oop method_type, int arg); jrose@1145: static int argument_slot_count(oop method_type) { return argument_slot(method_type, -1); } jrose@1145: static int argument_slot_to_argnum(oop method_type, int argslot); jrose@1145: jrose@1145: // Runtime support jrose@1145: enum { // bit-encoded flags from decode_method or decode_vmref jrose@1145: _dmf_has_receiver = 0x01, // target method has leading reference argument jrose@1145: _dmf_does_dispatch = 0x02, // method handle performs virtual or interface dispatch jrose@1145: _dmf_from_interface = 0x04, // peforms interface dispatch jrose@1145: _DMF_DIRECT_MASK = (_dmf_from_interface*2 - _dmf_has_receiver), jrose@1145: _dmf_binds_method = 0x08, jrose@1145: _dmf_binds_argument = 0x10, jrose@1145: _DMF_BOUND_MASK = (_dmf_binds_argument*2 - _dmf_binds_method), jrose@1145: _dmf_adapter_lsb = 0x20, jrose@1145: _DMF_ADAPTER_MASK = (_dmf_adapter_lsb << CONV_OP_LIMIT) - _dmf_adapter_lsb jrose@1145: }; jrose@1145: static methodOop decode_method(oop x, klassOop& receiver_limit_result, int& decode_flags_result); jrose@1145: enum { jrose@1145: // format of query to getConstant: jrose@1145: GC_JVM_PUSH_LIMIT = 0, jrose@1474: GC_JVM_STACK_MOVE_UNIT = 1, jrose@1145: jrose@1145: // format of result from getTarget / encode_target: jrose@1145: ETF_HANDLE_OR_METHOD_NAME = 0, // all available data (immediate MH or method) jrose@1145: ETF_DIRECT_HANDLE = 1, // ultimate method handle (will be a DMH, may be self) jrose@1145: ETF_METHOD_NAME = 2, // ultimate method as MemberName jrose@1145: ETF_REFLECT_METHOD = 3 // ultimate method as java.lang.reflect object (sans refClass) jrose@1145: }; jrose@1145: static int get_named_constant(int which, Handle name_box, TRAPS); jrose@1145: static oop encode_target(Handle mh, int format, TRAPS); // report vmtarget (to Java code) jrose@1145: static bool class_cast_needed(klassOop src, klassOop dst); jrose@1145: jrose@1145: private: jrose@1145: // These checkers operate on a pair of whole MethodTypes: jrose@1145: static const char* check_method_type_change(oop src_mtype, int src_beg, int src_end, jrose@1145: int insert_argnum, oop insert_type, jrose@1145: int change_argnum, oop change_type, jrose@1145: int delete_argnum, jrose@1474: oop dst_mtype, int dst_beg, int dst_end, jrose@1474: bool raw = false); jrose@1145: static const char* check_method_type_insertion(oop src_mtype, jrose@1145: int insert_argnum, oop insert_type, jrose@1145: oop dst_mtype) { jrose@1145: oop no_ref = NULL; jrose@1145: return check_method_type_change(src_mtype, 0, -1, jrose@1145: insert_argnum, insert_type, jrose@1145: -1, no_ref, -1, dst_mtype, 0, -1); jrose@1145: } jrose@1145: static const char* check_method_type_conversion(oop src_mtype, jrose@1145: int change_argnum, oop change_type, jrose@1145: oop dst_mtype) { jrose@1145: oop no_ref = NULL; jrose@1145: return check_method_type_change(src_mtype, 0, -1, -1, no_ref, jrose@1145: change_argnum, change_type, jrose@1145: -1, dst_mtype, 0, -1); jrose@1145: } jrose@1474: static const char* check_method_type_passthrough(oop src_mtype, oop dst_mtype, bool raw) { jrose@1145: oop no_ref = NULL; jrose@1145: return check_method_type_change(src_mtype, 0, -1, jrose@1145: -1, no_ref, -1, no_ref, -1, jrose@1474: dst_mtype, 0, -1, raw); jrose@1145: } jrose@1145: jrose@1145: // These checkers operate on pairs of argument or return types: jrose@1145: static const char* check_argument_type_change(BasicType src_type, klassOop src_klass, jrose@1145: BasicType dst_type, klassOop dst_klass, jrose@1474: int argnum, bool raw = false); jrose@1145: jrose@1145: static const char* check_argument_type_change(oop src_type, oop dst_type, jrose@1474: int argnum, bool raw = false) { jrose@1145: klassOop src_klass = NULL, dst_klass = NULL; jrose@1145: BasicType src_bt = java_lang_Class::as_BasicType(src_type, &src_klass); jrose@1145: BasicType dst_bt = java_lang_Class::as_BasicType(dst_type, &dst_klass); jrose@1145: return check_argument_type_change(src_bt, src_klass, jrose@1474: dst_bt, dst_klass, argnum, raw); jrose@1145: } jrose@1145: jrose@1474: static const char* check_return_type_change(oop src_type, oop dst_type, bool raw = false) { jrose@1474: return check_argument_type_change(src_type, dst_type, -1, raw); jrose@1145: } jrose@1145: jrose@1145: static const char* check_return_type_change(BasicType src_type, klassOop src_klass, jrose@1145: BasicType dst_type, klassOop dst_klass) { jrose@1145: return check_argument_type_change(src_type, src_klass, dst_type, dst_klass, -1); jrose@1145: } jrose@1145: jrose@1145: static const char* check_method_receiver(methodOop m, klassOop passed_recv_type); jrose@1145: jrose@1145: // These verifiers can block, and will throw an error if the checking fails: jrose@1145: static void verify_vmslots(Handle mh, TRAPS); jrose@1145: static void verify_vmargslot(Handle mh, int argnum, int argslot, TRAPS); jrose@1145: jrose@1145: static void verify_method_type(methodHandle m, Handle mtype, jrose@1145: bool has_bound_oop, jrose@1145: KlassHandle bound_oop_type, jrose@1145: TRAPS); jrose@1145: jrose@1145: static void verify_method_signature(methodHandle m, Handle mtype, jrose@1145: int first_ptype_pos, jrose@1145: KlassHandle insert_ptype, TRAPS); jrose@1145: jrose@1145: static void verify_DirectMethodHandle(Handle mh, methodHandle m, TRAPS); jrose@1145: static void verify_BoundMethodHandle(Handle mh, Handle target, int argnum, jrose@1145: bool direct_to_method, TRAPS); jrose@1145: static void verify_BoundMethodHandle_with_receiver(Handle mh, methodHandle m, TRAPS); jrose@1145: static void verify_AdapterMethodHandle(Handle mh, int argnum, TRAPS); jrose@1145: jrose@1145: public: jrose@1145: jrose@1145: // Fill in the fields of a DirectMethodHandle mh. (MH.type must be pre-filled.) jrose@1145: static void init_DirectMethodHandle(Handle mh, methodHandle method, bool do_dispatch, TRAPS); jrose@1145: jrose@1145: // Fill in the fields of a BoundMethodHandle mh. (MH.type, BMH.argument must be pre-filled.) jrose@1145: static void init_BoundMethodHandle(Handle mh, Handle target, int argnum, TRAPS); jrose@1145: static void init_BoundMethodHandle_with_receiver(Handle mh, jrose@1145: methodHandle original_m, jrose@1145: KlassHandle receiver_limit, jrose@1145: int decode_flags, jrose@1145: TRAPS); jrose@1145: jrose@1145: // Fill in the fields of an AdapterMethodHandle mh. (MH.type must be pre-filled.) jrose@1145: static void init_AdapterMethodHandle(Handle mh, Handle target, int argnum, TRAPS); jrose@1145: jrose@1145: #ifdef ASSERT jrose@1145: static bool spot_check_entry_names(); jrose@1145: #endif jrose@1145: jrose@1145: private: jrose@1145: static methodHandle dispatch_decoded_method(methodHandle m, jrose@1145: KlassHandle receiver_limit, jrose@1145: int decode_flags, jrose@1145: KlassHandle receiver_klass, jrose@1145: TRAPS); jrose@1145: jrose@1145: static bool same_basic_type_for_arguments(BasicType src, BasicType dst, jrose@1474: bool raw = false, jrose@1145: bool for_return = false); jrose@1474: static bool same_basic_type_for_returns(BasicType src, BasicType dst, bool raw = false) { jrose@1474: return same_basic_type_for_arguments(src, dst, raw, true); jrose@1145: } jrose@1145: jrose@1145: enum { // arg_mask values jrose@1145: _INSERT_NO_MASK = -1, jrose@1145: _INSERT_REF_MASK = 0, jrose@1145: _INSERT_INT_MASK = 1, jrose@1145: _INSERT_LONG_MASK = 3 jrose@1145: }; jrose@1145: static void insert_arg_slots(MacroAssembler* _masm, jrose@1145: RegisterOrConstant arg_slots, jrose@1145: int arg_mask, jrose@1145: Register rax_argslot, jrose@1145: Register rbx_temp, Register rdx_temp); jrose@1145: jrose@1145: static void remove_arg_slots(MacroAssembler* _masm, jrose@1145: RegisterOrConstant arg_slots, jrose@1145: Register rax_argslot, jrose@1145: Register rbx_temp, Register rdx_temp); jrose@1145: }; jrose@1145: jrose@1145: jrose@1145: // Access methods for the "entry" field of a java.dyn.MethodHandle. jrose@1145: // The field is primarily a jump target for compiled calls. jrose@1145: // However, we squirrel away some nice pointers for other uses, jrose@1145: // just before the jump target. jrose@1145: // Aspects of a method handle entry: jrose@1145: // - from_compiled_entry - stub used when compiled code calls the MH jrose@1145: // - from_interpreted_entry - stub used when the interpreter calls the MH jrose@1145: // - type_checking_entry - stub for runtime casting between MHForm siblings (NYI) jrose@1145: class MethodHandleEntry { jrose@1145: public: jrose@1145: class Data { jrose@1145: friend class MethodHandleEntry; jrose@1145: size_t _total_size; // size including Data and code stub jrose@1145: MethodHandleEntry* _type_checking_entry; jrose@1145: address _from_interpreted_entry; jrose@1145: MethodHandleEntry* method_entry() { return (MethodHandleEntry*)(this + 1); } jrose@1145: }; jrose@1145: jrose@1145: Data* data() { return (Data*)this - 1; } jrose@1145: jrose@1145: address start_address() { return (address) data(); } jrose@1145: address end_address() { return start_address() + data()->_total_size; } jrose@1145: jrose@1145: address from_compiled_entry() { return (address) this; } jrose@1145: jrose@1145: address from_interpreted_entry() { return data()->_from_interpreted_entry; } jrose@1145: void set_from_interpreted_entry(address e) { data()->_from_interpreted_entry = e; } jrose@1145: jrose@1145: MethodHandleEntry* type_checking_entry() { return data()->_type_checking_entry; } jrose@1145: void set_type_checking_entry(MethodHandleEntry* e) { data()->_type_checking_entry = e; } jrose@1145: jrose@1145: void set_end_address(address end_addr) { jrose@1145: size_t total_size = end_addr - start_address(); jrose@1145: assert(total_size > 0 && total_size < 0x1000, "reasonable end address"); jrose@1145: data()->_total_size = total_size; jrose@1145: } jrose@1145: jrose@1145: // Compiler support: jrose@1145: static int from_interpreted_entry_offset_in_bytes() { jrose@1145: return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); jrose@1145: } jrose@1145: static int type_checking_entry_offset_in_bytes() { jrose@1145: return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); jrose@1145: } jrose@1145: jrose@1145: static address start_compiled_entry(MacroAssembler* _masm, jrose@1145: address interpreted_entry = NULL); jrose@1145: static MethodHandleEntry* finish_compiled_entry(MacroAssembler* masm, address start_addr); jrose@1145: }; jrose@1145: jrose@1145: address MethodHandles::from_compiled_entry(EntryKind ek) { return entry(ek)->from_compiled_entry(); } jrose@1145: address MethodHandles::from_interpreted_entry(EntryKind ek) { return entry(ek)->from_interpreted_entry(); }