/* * 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