/* * Copyright (c) 2011, 2012, 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. * */ // Platform-specific definitions for method handles. // These definitions are inlined into class MethodHandles. // Adapters enum /* platform_dependent_constants */ { adapter_code_size = NOT_LP64(23000 DEBUG_ONLY(+ 40000)) LP64_ONLY(35000 DEBUG_ONLY(+ 50000)) }; public: class RicochetFrame : public ResourceObj { friend class MethodHandles; private: /* RF field x86 SPARC sender_pc *(rsp+0) I7-0x8 sender_link rbp I6+BIAS exact_sender_sp rsi/r13 I5_savedSP conversion *(rcx+&amh_conv) L5_conv saved_args_base rax L4_sab (cf. Gargs = G4) saved_args_layout #NULL L3_sal saved_target *(rcx+&mh_vmtgt) L2_stgt continuation #STUB_CON L1_cont */ static const Register L1_continuation ; // what to do when control gets back here static const Register L2_saved_target ; // target method handle to invoke on saved_args static const Register L3_saved_args_layout; // caching point for MethodTypeForm.vmlayout cookie static const Register L4_saved_args_base ; // base of pushed arguments (slot 0, arg N) (-3) static const Register L5_conversion ; // misc. information from original AdapterMethodHandle (-2) frame _fr; RicochetFrame(const frame& fr) : _fr(fr) { } intptr_t* register_addr(Register reg) const { assert((_fr.sp() + reg->sp_offset_in_saved_window()) == _fr.register_addr(reg), "must agree"); return _fr.register_addr(reg); } intptr_t register_value(Register reg) const { return *register_addr(reg); } public: intptr_t* continuation() const { return (intptr_t*) register_value(L1_continuation); } oop saved_target() const { return (oop) register_value(L2_saved_target); } oop saved_args_layout() const { return (oop) register_value(L3_saved_args_layout); } intptr_t* saved_args_base() const { return (intptr_t*) register_value(L4_saved_args_base); } intptr_t conversion() const { return register_value(L5_conversion); } intptr_t* exact_sender_sp() const { return (intptr_t*) register_value(I5_savedSP); } intptr_t* sender_link() const { return _fr.sender_sp(); } // XXX address sender_pc() const { return _fr.sender_pc(); } // This value is not used for much, but it apparently must be nonzero. static int frame_size_in_bytes() { return wordSize * 4; } intptr_t* extended_sender_sp() const { return saved_args_base(); } intptr_t return_value_slot_number() const { return adapter_conversion_vminfo(conversion()); } BasicType return_value_type() const { return adapter_conversion_dest_type(conversion()); } bool has_return_value_slot() const { return return_value_type() != T_VOID; } intptr_t* return_value_slot_addr() const { assert(has_return_value_slot(), ""); return saved_arg_slot_addr(return_value_slot_number()); } intptr_t* saved_target_slot_addr() const { return saved_arg_slot_addr(saved_args_length()); } intptr_t* saved_arg_slot_addr(int slot) const { assert(slot >= 0, ""); return (intptr_t*)( (address)saved_args_base() + (slot * Interpreter::stackElementSize) ); } jint saved_args_length() const; jint saved_arg_offset(int arg) const; // GC interface oop* saved_target_addr() { return (oop*)register_addr(L2_saved_target); } oop* saved_args_layout_addr() { return (oop*)register_addr(L3_saved_args_layout); } oop compute_saved_args_layout(bool read_cache, bool write_cache); #ifdef ASSERT // The magic number is supposed to help find ricochet frames within the bytes of stack dumps. enum { MAGIC_NUMBER_1 = 0xFEED03E, MAGIC_NUMBER_2 = 0xBEEF03E }; static const Register L0_magic_number_1 ; // cookie for debugging, at start of RSA static Address magic_number_2_addr() { return Address(L4_saved_args_base, -wordSize); } intptr_t magic_number_1() const { return register_value(L0_magic_number_1); } intptr_t magic_number_2() const { return saved_args_base()[-1]; } #endif //ASSERT public: enum { RETURN_VALUE_PLACEHOLDER = (NOT_DEBUG(0) DEBUG_ONLY(42)) }; void verify() const NOT_DEBUG_RETURN; // check for MAGIC_NUMBER, etc. static void generate_ricochet_blob(MacroAssembler* _masm, // output params: int* bounce_offset, int* exception_offset, int* frame_size_in_words); static void enter_ricochet_frame(MacroAssembler* _masm, Register recv_reg, Register argv_reg, address return_handler); static void leave_ricochet_frame(MacroAssembler* _masm, Register recv_reg, Register new_sp_reg, Register sender_pc_reg); static RicochetFrame* from_frame(const frame& fr) { RicochetFrame* rf = new RicochetFrame(fr); rf->verify(); return rf; } static void verify_clean(MacroAssembler* _masm) NOT_DEBUG_RETURN; static void describe(const frame* fr, FrameValues& values, int frame_no) NOT_DEBUG_RETURN; }; // Additional helper methods for MethodHandles code generation: public: static void load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp_reg, Register temp2_reg); static void load_conversion_vminfo(MacroAssembler* _masm, Address conversion_field_addr, Register reg); static void extract_conversion_vminfo(MacroAssembler* _masm, Register conversion_field_reg, Register reg); static void extract_conversion_dest_type(MacroAssembler* _masm, Register conversion_field_reg, Register reg); static void load_stack_move(MacroAssembler* _masm, Address G3_amh_conversion, Register G5_stack_move); static void insert_arg_slots(MacroAssembler* _masm, RegisterOrConstant arg_slots, Register argslot_reg, Register temp_reg, Register temp2_reg, Register temp3_reg); static void remove_arg_slots(MacroAssembler* _masm, RegisterOrConstant arg_slots, Register argslot_reg, Register temp_reg, Register temp2_reg, Register temp3_reg); static void push_arg_slots(MacroAssembler* _masm, Register argslot_reg, RegisterOrConstant slot_count, Register temp_reg, Register temp2_reg); static void move_arg_slots_up(MacroAssembler* _masm, Register bottom_reg, // invariant Address top_addr, // can use temp_reg RegisterOrConstant positive_distance_in_slots, Register temp_reg, Register temp2_reg); static void move_arg_slots_down(MacroAssembler* _masm, Address bottom_addr, // can use temp_reg Register top_reg, // invariant RegisterOrConstant negative_distance_in_slots, Register temp_reg, Register temp2_reg); static void move_typed_arg(MacroAssembler* _masm, BasicType type, bool is_element, Address value_src, Address slot_dest, Register temp_reg); static void move_return_value(MacroAssembler* _masm, BasicType type, Address return_slot); static void verify_argslot(MacroAssembler* _masm, Register argslot_reg, Register temp_reg, const char* error_message) NOT_DEBUG_RETURN; static void verify_argslots(MacroAssembler* _masm, RegisterOrConstant argslot_count, Register argslot_reg, Register temp_reg, Register temp2_reg, bool negate_argslot, const char* error_message) NOT_DEBUG_RETURN; static void verify_stack_move(MacroAssembler* _masm, RegisterOrConstant arg_slots, int direction) NOT_DEBUG_RETURN; static void verify_klass(MacroAssembler* _masm, Register obj_reg, KlassHandle klass, Register temp_reg, Register temp2_reg, const char* error_message = "wrong klass") NOT_DEBUG_RETURN; static void verify_method_handle(MacroAssembler* _masm, Register mh_reg, Register temp_reg, Register temp2_reg) { verify_klass(_masm, mh_reg, SystemDictionaryHandles::MethodHandle_klass(), temp_reg, temp2_reg, "reference is a MH"); } // Similar to InterpreterMacroAssembler::jump_from_interpreted. // Takes care of special dispatch from single stepping too. static void jump_from_method_handle(MacroAssembler* _masm, Register method, Register temp, Register temp2); static void trace_method_handle(MacroAssembler* _masm, const char* adaptername) PRODUCT_RETURN;