| /* |
| * Copyright (c) 2008, 2017, 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 CPU_ARM_VM_INTERP_MASM_ARM_HPP |
| #define CPU_ARM_VM_INTERP_MASM_ARM_HPP |
| |
| #include "asm/macroAssembler.hpp" |
| #include "asm/macroAssembler.inline.hpp" |
| #include "interpreter/invocationCounter.hpp" |
| #include "runtime/frame.hpp" |
| #include "prims/jvmtiExport.hpp" |
| |
| // This file specializes the assember with interpreter-specific macros |
| |
| |
| class InterpreterMacroAssembler: public MacroAssembler { |
| |
| public: |
| |
| // allow JvmtiExport checks to be extended |
| bool can_force_early_return() { return JvmtiExport::can_force_early_return(); } |
| bool can_post_interpreter_events() { return JvmtiExport::can_post_interpreter_events(); } |
| bool can_pop_frame() { return JvmtiExport::can_pop_frame(); } |
| bool can_post_breakpoint() { return JvmtiExport::can_post_breakpoint(); } |
| bool can_post_field_access() { return JvmtiExport::can_post_field_access(); } |
| bool can_post_field_modification() { return JvmtiExport::can_post_field_modification(); } |
| // flags controlled by JVMTI settings |
| bool rewrite_frequent_pairs() { return RewriteFrequentPairs; } |
| |
| protected: |
| |
| // Template interpreter specific version of call_VM_helper |
| virtual void call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions); |
| |
| // base routine for all dispatches |
| typedef enum { DispatchDefault, DispatchNormal } DispatchTableMode; |
| void dispatch_base(TosState state, DispatchTableMode table_mode, bool verifyoop = true); |
| |
| public: |
| InterpreterMacroAssembler(CodeBuffer* code); |
| |
| virtual void check_and_handle_popframe(); |
| virtual void check_and_handle_earlyret(); |
| |
| // Interpreter-specific registers |
| #if defined(AARCH64) && defined(ASSERT) |
| |
| #define check_stack_top() _check_stack_top("invalid Rstack_top at " __FILE__ ":" XSTR(__LINE__)) |
| #define check_stack_top_on_expansion() _check_stack_top("invalid Rstack_top at " __FILE__ ":" XSTR(__LINE__), VerifyInterpreterStackTop) |
| #define check_extended_sp(tmp) _check_extended_sp(tmp, "SP does not match extended SP in frame at " __FILE__ ":" XSTR(__LINE__)) |
| #define check_no_cached_stack_top(tmp) _check_no_cached_stack_top(tmp, "stack_top is already cached in frame at " __FILE__ ":" XSTR(__LINE__)) |
| |
| void _check_stack_top(const char* msg, bool enabled = true) { |
| if (enabled) { |
| Label L; |
| cmp(SP, Rstack_top); |
| b(L, ls); |
| stop(msg); |
| bind(L); |
| } |
| } |
| |
| void _check_extended_sp(Register tmp, const char* msg) { |
| Label L; |
| ldr(tmp, Address(FP, frame::interpreter_frame_extended_sp_offset * wordSize)); |
| cmp(SP, tmp); |
| b(L, eq); |
| stop(msg); |
| bind(L); |
| } |
| |
| void _check_no_cached_stack_top(Register tmp, const char* msg) { |
| Label L; |
| ldr(tmp, Address(FP, frame::interpreter_frame_stack_top_offset * wordSize)); |
| cbz(tmp, L); |
| stop(msg); |
| bind(L); |
| } |
| |
| #else |
| |
| inline void check_stack_top() {} |
| inline void check_stack_top_on_expansion() {} |
| inline void check_extended_sp(Register tmp) {} |
| inline void check_no_cached_stack_top(Register tmp) {} |
| |
| #endif // AARCH64 && ASSERT |
| |
| void save_bcp() { str(Rbcp, Address(FP, frame::interpreter_frame_bcp_offset * wordSize)); } |
| void restore_bcp() { ldr(Rbcp, Address(FP, frame::interpreter_frame_bcp_offset * wordSize)); } |
| void restore_locals() { ldr(Rlocals, Address(FP, frame::interpreter_frame_locals_offset * wordSize)); } |
| void restore_method() { ldr(Rmethod, Address(FP, frame::interpreter_frame_method_offset * wordSize)); } |
| void restore_dispatch(); |
| |
| #ifdef AARCH64 |
| void save_stack_top() { check_stack_top(); str(Rstack_top, Address(FP, frame::interpreter_frame_stack_top_offset * wordSize)); } |
| void clear_cached_stack_top() { str(ZR, Address(FP, frame::interpreter_frame_stack_top_offset * wordSize)); } |
| void restore_stack_top() { ldr(Rstack_top, Address(FP, frame::interpreter_frame_stack_top_offset * wordSize)); clear_cached_stack_top(); check_stack_top(); } |
| void cut_sp_before_call() { align_reg(SP, Rstack_top, StackAlignmentInBytes); } |
| void restore_sp_after_call(Register tmp) { ldr(tmp, Address(FP, frame::interpreter_frame_extended_sp_offset * wordSize)); mov(SP, tmp); } |
| #endif |
| |
| // Helpers for runtime call arguments/results |
| void get_const(Register reg) { ldr(reg, Address(Rmethod, Method::const_offset())); } |
| void get_constant_pool(Register reg) { get_const(reg); ldr(reg, Address(reg, ConstMethod::constants_offset())); } |
| void get_constant_pool_cache(Register reg) { get_constant_pool(reg); ldr(reg, Address(reg, ConstantPool::cache_offset_in_bytes())); } |
| void get_cpool_and_tags(Register cpool, Register tags) { get_constant_pool(cpool); ldr(tags, Address(cpool, ConstantPool::tags_offset_in_bytes())); } |
| |
| // Sets reg. Blows Rtemp. |
| void get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset); |
| |
| // Sets index. Blows reg_tmp. |
| void get_index_at_bcp(Register index, int bcp_offset, Register reg_tmp, size_t index_size = sizeof(u2)); |
| // Sets cache, index. |
| void get_cache_and_index_at_bcp(Register cache, Register index, int bcp_offset, size_t index_size = sizeof(u2)); |
| void get_cache_and_index_and_bytecode_at_bcp(Register cache, Register index, Register bytecode, int byte_no, int bcp_offset, size_t index_size = sizeof(u2)); |
| // Sets cache. Blows reg_tmp. |
| void get_cache_entry_pointer_at_bcp(Register cache, Register reg_tmp, int bcp_offset, size_t index_size = sizeof(u2)); |
| |
| // Load object from cpool->resolved_references(*bcp+1) |
| void load_resolved_reference_at_index(Register result, Register tmp); |
| |
| // load cpool->resolved_klass_at(index); Rtemp is corrupted upon return |
| void load_resolved_klass_at_offset(Register Rcpool, Register Rindex, Register Rklass); |
| |
| void store_check_part1(Register card_table_base); // Sets card_table_base register. |
| void store_check_part2(Register obj, Register card_table_base, Register tmp); |
| |
| void set_card(Register card_table_base, Address card_table_addr, Register tmp); |
| |
| void pop_ptr(Register r); |
| void pop_i(Register r = R0_tos); |
| #ifdef AARCH64 |
| void pop_l(Register r = R0_tos); |
| #else |
| void pop_l(Register lo = R0_tos_lo, Register hi = R1_tos_hi); |
| #endif |
| void pop_f(FloatRegister fd); |
| void pop_d(FloatRegister fd); |
| |
| void push_ptr(Register r); |
| void push_i(Register r = R0_tos); |
| #ifdef AARCH64 |
| void push_l(Register r = R0_tos); |
| #else |
| void push_l(Register lo = R0_tos_lo, Register hi = R1_tos_hi); |
| #endif |
| void push_f(); |
| void push_d(); |
| |
| // Transition vtos -> state. Blows R0, R1. Sets TOS cached value. |
| void pop(TosState state); |
| // Transition state -> vtos. Blows Rtemp. |
| void push(TosState state); |
| |
| #ifndef AARCH64 |
| // The following methods are overridden to allow overloaded calls to |
| // MacroAssembler::push/pop(Register) |
| // MacroAssembler::push/pop(RegisterSet) |
| // InterpreterMacroAssembler::push/pop(TosState) |
| void push(Register rd, AsmCondition cond = al) { MacroAssembler::push(rd, cond); } |
| void pop(Register rd, AsmCondition cond = al) { MacroAssembler::pop(rd, cond); } |
| |
| void push(RegisterSet reg_set, AsmCondition cond = al) { MacroAssembler::push(reg_set, cond); } |
| void pop(RegisterSet reg_set, AsmCondition cond = al) { MacroAssembler::pop(reg_set, cond); } |
| |
| // Converts return value in R0/R1 (interpreter calling conventions) to TOS cached value. |
| void convert_retval_to_tos(TosState state); |
| // Converts TOS cached value to return value in R0/R1 (according to interpreter calling conventions). |
| void convert_tos_to_retval(TosState state); |
| #endif |
| |
| // JVMTI ForceEarlyReturn support |
| void load_earlyret_value(TosState state); |
| |
| void jump_to_entry(address entry); |
| |
| // Blows Rtemp. |
| void empty_expression_stack() { |
| ldr(Rstack_top, Address(FP, frame::interpreter_frame_monitor_block_top_offset * wordSize)); |
| check_stack_top(); |
| #ifdef AARCH64 |
| clear_cached_stack_top(); |
| #else |
| // NULL last_sp until next java call |
| str(zero_register(Rtemp), Address(FP, frame::interpreter_frame_last_sp_offset * wordSize)); |
| #endif // AARCH64 |
| } |
| |
| // Helpers for swap and dup |
| void load_ptr(int n, Register val); |
| void store_ptr(int n, Register val); |
| |
| // Generate a subtype check: branch to not_subtype if sub_klass is |
| // not a subtype of super_klass. |
| // Profiling code for the subtype check failure (profile_typecheck_failed) |
| // should be explicitly generated by the caller in the not_subtype case. |
| // Blows Rtemp, tmp1, tmp2. |
| void gen_subtype_check(Register Rsub_klass, Register Rsuper_klass, |
| Label ¬_subtype, Register tmp1, Register tmp2); |
| |
| // Dispatching |
| void dispatch_prolog(TosState state, int step = 0); |
| void dispatch_epilog(TosState state, int step = 0); |
| void dispatch_only(TosState state); // dispatch by R3_bytecode |
| void dispatch_only_normal(TosState state); // dispatch normal table by R3_bytecode |
| void dispatch_only_noverify(TosState state); |
| void dispatch_next(TosState state, int step = 0); // load R3_bytecode from [Rbcp + step] and dispatch by R3_bytecode |
| |
| // jump to an invoked target |
| void prepare_to_jump_from_interpreted(); |
| void jump_from_interpreted(Register method); |
| |
| void narrow(Register result); |
| |
| // Returning from interpreted functions |
| // |
| // Removes the current activation (incl. unlocking of monitors) |
| // and sets up the return address. This code is also used for |
| // exception unwindwing. In that case, we do not want to throw |
| // IllegalMonitorStateExceptions, since that might get us into an |
| // infinite rethrow exception loop. |
| // Additionally this code is used for popFrame and earlyReturn. |
| // In popFrame case we want to skip throwing an exception, |
| // installing an exception, and notifying jvmdi. |
| // In earlyReturn case we only want to skip throwing an exception |
| // and installing an exception. |
| void remove_activation(TosState state, Register ret_addr, |
| bool throw_monitor_exception = true, |
| bool install_monitor_exception = true, |
| bool notify_jvmdi = true); |
| |
| // At certain points in the method invocation the monitor of |
| // synchronized methods hasn't been entered yet. |
| // To correctly handle exceptions at these points, we set the thread local |
| // variable _do_not_unlock_if_synchronized to true. The remove_activation will |
| // check this flag. |
| void set_do_not_unlock_if_synchronized(bool flag, Register tmp); |
| |
| // Debugging |
| void interp_verify_oop(Register reg, TosState state, const char* file, int line); // only if +VerifyOops && state == atos |
| |
| void verify_FPU(int stack_depth, TosState state = ftos) { |
| // No VFP state verification is required for ARM |
| } |
| |
| // Object locking |
| void lock_object (Register lock_reg); |
| void unlock_object(Register lock_reg); |
| |
| // Interpreter profiling operations |
| void set_method_data_pointer_for_bcp(); // Blows R0-R3/R0-R18, Rtemp, LR |
| void test_method_data_pointer(Register mdp, Label& zero_continue); |
| void verify_method_data_pointer(); |
| |
| void set_mdp_data_at(Register mdp_in, int offset, Register value); |
| |
| // Increments mdp data. Sets bumped_count register to adjusted counter. |
| void increment_mdp_data_at(Address data, Register bumped_count, bool decrement = false); |
| // Increments mdp data. Sets bumped_count register to adjusted counter. |
| void increment_mdp_data_at(Register mdp_in, int offset, Register bumped_count, bool decrement = false); |
| void increment_mask_and_jump(Address counter_addr, |
| int increment, Address mask_addr, |
| Register scratch, Register scratch2, |
| AsmCondition cond, Label* where); |
| void set_mdp_flag_at(Register mdp_in, int flag_constant); |
| |
| void test_mdp_data_at(Register mdp_in, int offset, Register value, |
| Register test_value_out, |
| Label& not_equal_continue); |
| |
| void record_klass_in_profile(Register receiver, Register mdp, |
| Register reg_tmp, bool is_virtual_call); |
| void record_klass_in_profile_helper(Register receiver, Register mdp, |
| Register reg_tmp, |
| int start_row, Label& done, bool is_virtual_call); |
| |
| void update_mdp_by_offset(Register mdp_in, int offset_of_offset, Register reg_tmp); |
| void update_mdp_by_offset(Register mdp_in, Register reg_offset, Register reg_tmp); |
| void update_mdp_by_constant(Register mdp_in, int constant); |
| void update_mdp_for_ret(Register return_bci); // Blows R0-R3/R0-R18, Rtemp, LR |
| |
| void profile_taken_branch(Register mdp, Register bumped_count); // Sets mdp, bumped_count registers, blows Rtemp. |
| void profile_not_taken_branch(Register mdp); // Sets mdp, blows Rtemp. |
| |
| void profile_call(Register mdp); // Sets mdp, blows Rtemp. |
| void profile_final_call(Register mdp); // Sets mdp, blows Rtemp. |
| void profile_virtual_call(Register mdp, Register receiver, // Sets mdp, blows Rtemp. |
| bool receiver_can_be_null = false); |
| void profile_ret(Register mdp, Register return_bci); // Sets mdp, blows R0-R3/R0-R18, Rtemp, LR |
| void profile_null_seen(Register mdp); // Sets mdp. |
| void profile_typecheck(Register mdp, Register klass); // Sets mdp, blows Rtemp. |
| |
| void profile_typecheck_failed(Register mdp); // Sets mdp, blows Rtemp. |
| void profile_switch_default(Register mdp); // Sets mdp, blows Rtemp. |
| |
| // Sets mdp. Blows reg_tmp1, reg_tmp2. Index could be the same as reg_tmp2. |
| void profile_switch_case(Register mdp, Register index, Register reg_tmp1, Register reg_tmp2); |
| |
| void byteswap_u32(Register r, Register rtmp1, Register rtmp2); |
| |
| void inc_global_counter(address address_of_counter, int offset_in_bytes, Register tmp1, Register tmp2, bool avoid_overflow); |
| |
| typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode; |
| |
| // support for jvmti |
| void notify_method_entry(); |
| void notify_method_exit(TosState state, NotifyMethodExitMode mode, |
| bool native = false, Register result_lo = noreg, Register result_hi = noreg, FloatRegister result_fp = fnoreg); |
| |
| void trace_state(const char* msg) PRODUCT_RETURN; |
| |
| void get_method_counters(Register method, |
| Register Rcounters, |
| Label& skip, |
| bool saveRegs = false, |
| Register reg1 = noreg, |
| Register reg2 = noreg, |
| Register reg3 = noreg); |
| }; |
| |
| #endif // CPU_ARM_VM_INTERP_MASM_ARM_HPP |