| /* |
| * 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; |
