1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef CPU_X86_VM_INTERP_MASM_X86_HPP 26 #define CPU_X86_VM_INTERP_MASM_X86_HPP 27 28 #include "asm/macroAssembler.hpp" 29 #include "interpreter/invocationCounter.hpp" 30 #include "runtime/frame.hpp" 31 32 // This file specializes the assember with interpreter-specific macros 33 34 typedef ByteSize (*OffsetFunction)(uint); 35 36 class InterpreterMacroAssembler: public MacroAssembler { 37 public: 38 // Interpreter specific version of call_VM_base 39 virtual void call_VM_leaf_base(address entry_point, 40 int number_of_arguments); 41 42 protected: 43 44 virtual void call_VM_base(Register oop_result, 45 Register java_thread, 46 Register last_java_sp, 47 address entry_point, 48 int number_of_arguments, 49 bool check_exceptions); 50 51 // base routine for all dispatches 52 void dispatch_base(TosState state, address* table, bool verifyoop = true, bool generate_poll = false); 53 54 public: InterpreterMacroAssembler(CodeBuffer * code)55 InterpreterMacroAssembler(CodeBuffer* code) : MacroAssembler(code), 56 _locals_register(LP64_ONLY(r14) NOT_LP64(rdi)), 57 _bcp_register(LP64_ONLY(r13) NOT_LP64(rsi)) {} 58 59 void jump_to_entry(address entry); 60 61 virtual void check_and_handle_popframe(Register java_thread); 62 virtual void check_and_handle_earlyret(Register java_thread); 63 64 void load_earlyret_value(TosState state); 65 66 // Interpreter-specific registers save_bcp()67 void save_bcp() { 68 movptr(Address(rbp, frame::interpreter_frame_bcp_offset * wordSize), _bcp_register); 69 } 70 restore_bcp()71 void restore_bcp() { 72 movptr(_bcp_register, Address(rbp, frame::interpreter_frame_bcp_offset * wordSize)); 73 } 74 restore_locals()75 void restore_locals() { 76 movptr(_locals_register, Address(rbp, frame::interpreter_frame_locals_offset * wordSize)); 77 } 78 79 // Helpers for runtime call arguments/results get_method(Register reg)80 void get_method(Register reg) { 81 movptr(reg, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); 82 } 83 get_const(Register reg)84 void get_const(Register reg) { 85 get_method(reg); 86 movptr(reg, Address(reg, Method::const_offset())); 87 } 88 get_constant_pool(Register reg)89 void get_constant_pool(Register reg) { 90 get_const(reg); 91 movptr(reg, Address(reg, ConstMethod::constants_offset())); 92 } 93 get_constant_pool_cache(Register reg)94 void get_constant_pool_cache(Register reg) { 95 get_constant_pool(reg); 96 movptr(reg, Address(reg, ConstantPool::cache_offset_in_bytes())); 97 } 98 get_cpool_and_tags(Register cpool,Register tags)99 void get_cpool_and_tags(Register cpool, Register tags) { 100 get_constant_pool(cpool); 101 movptr(tags, Address(cpool, ConstantPool::tags_offset_in_bytes())); 102 } 103 104 void get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset); 105 void get_cache_and_index_at_bcp(Register cache, 106 Register index, 107 int bcp_offset, 108 size_t index_size = sizeof(u2)); 109 void get_cache_and_index_and_bytecode_at_bcp(Register cache, 110 Register index, 111 Register bytecode, 112 int byte_no, 113 int bcp_offset, 114 size_t index_size = sizeof(u2)); 115 void get_cache_entry_pointer_at_bcp(Register cache, 116 Register tmp, 117 int bcp_offset, 118 size_t index_size = sizeof(u2)); 119 void get_cache_index_at_bcp(Register index, 120 int bcp_offset, 121 size_t index_size = sizeof(u2)); 122 123 // load cpool->resolved_references(index); 124 void load_resolved_reference_at_index(Register result, Register index, Register tmp = rscratch2); 125 126 // load cpool->resolved_klass_at(index) 127 void load_resolved_klass_at_index(Register cpool, // the constant pool (corrupted on return) 128 Register index, // the constant pool index (corrupted on return) 129 Register klass); // contains the Klass on return 130 131 NOT_LP64(void f2ieee();) // truncate ftos to 32bits 132 NOT_LP64(void d2ieee();) // truncate dtos to 64bits 133 134 // Expression stack 135 void pop_ptr(Register r = rax); 136 void pop_i(Register r = rax); 137 void push_ptr(Register r = rax); 138 void push_i(Register r = rax); 139 140 void push_f(XMMRegister r); 141 void pop_f(XMMRegister r); 142 void pop_d(XMMRegister r); 143 void push_d(XMMRegister r); 144 #ifdef _LP64 145 void pop_l(Register r = rax); 146 void push_l(Register r = rax); 147 #else 148 void pop_l(Register lo = rax, Register hi = rdx); 149 void pop_f(); 150 void pop_d(); 151 152 void push_l(Register lo = rax, Register hi = rdx); 153 void push_d(); 154 void push_f(); 155 #endif // _LP64 156 pop(Register r)157 void pop(Register r) { ((MacroAssembler*)this)->pop(r); } push(Register r)158 void push(Register r) { ((MacroAssembler*)this)->push(r); } push(int32_t imm)159 void push(int32_t imm ) { ((MacroAssembler*)this)->push(imm); } 160 161 void pop(TosState state); // transition vtos -> state 162 void push(TosState state); // transition state -> vtos 163 164 // These are dummies to prevent surprise implicit conversions to Register 165 void pop(void* v); // Add unimplemented ambiguous method 166 void push(void* v); // Add unimplemented ambiguous method 167 empty_expression_stack()168 void empty_expression_stack() { 169 movptr(rsp, Address(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize)); 170 // NULL last_sp until next java call 171 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), LP64_ONLY((int32_t))NULL_WORD); 172 NOT_LP64(empty_FPU_stack()); 173 } 174 175 // Helpers for swap and dup 176 void load_ptr(int n, Register val); 177 void store_ptr(int n, Register val); 178 179 // Generate a subtype check: branch to ok_is_subtype if sub_klass is 180 // a subtype of super_klass. 181 void gen_subtype_check( Register sub_klass, Label &ok_is_subtype ); 182 183 // Dispatching 184 void dispatch_prolog(TosState state, int step = 0); 185 void dispatch_epilog(TosState state, int step = 0); 186 // dispatch via rbx (assume rbx is loaded already) 187 void dispatch_only(TosState state, bool generate_poll = false); 188 // dispatch normal table via rbx (assume rbx is loaded already) 189 void dispatch_only_normal(TosState state); 190 void dispatch_only_noverify(TosState state); 191 // load rbx from [_bcp_register + step] and dispatch via rbx 192 void dispatch_next(TosState state, int step = 0, bool generate_poll = false); 193 // load rbx from [_bcp_register] and dispatch via rbx and table 194 void dispatch_via (TosState state, address* table); 195 196 // jump to an invoked target 197 void prepare_to_jump_from_interpreted(); 198 void jump_from_interpreted(Register method, Register temp); 199 200 // narrow int return value 201 void narrow(Register result); 202 203 // Returning from interpreted functions 204 // 205 // Removes the current activation (incl. unlocking of monitors) 206 // and sets up the return address. This code is also used for 207 // exception unwindwing. In that case, we do not want to throw 208 // IllegalMonitorStateExceptions, since that might get us into an 209 // infinite rethrow exception loop. 210 // Additionally this code is used for popFrame and earlyReturn. 211 // In popFrame case we want to skip throwing an exception, 212 // installing an exception, and notifying jvmdi. 213 // In earlyReturn case we only want to skip throwing an exception 214 // and installing an exception. 215 void remove_activation(TosState state, Register ret_addr, 216 bool throw_monitor_exception = true, 217 bool install_monitor_exception = true, 218 bool notify_jvmdi = true); 219 void get_method_counters(Register method, Register mcs, Label& skip); 220 221 // Object locking 222 void lock_object (Register lock_reg); 223 void unlock_object(Register lock_reg); 224 225 // Interpreter profiling operations 226 void set_method_data_pointer_for_bcp(); 227 void test_method_data_pointer(Register mdp, Label& zero_continue); 228 void verify_method_data_pointer(); 229 230 void set_mdp_data_at(Register mdp_in, int constant, Register value); 231 void increment_mdp_data_at(Address data, bool decrement = false); 232 void increment_mdp_data_at(Register mdp_in, int constant, 233 bool decrement = false); 234 void increment_mdp_data_at(Register mdp_in, Register reg, int constant, 235 bool decrement = false); 236 void increment_mask_and_jump(Address counter_addr, 237 int increment, Address mask, 238 Register scratch, bool preloaded, 239 Condition cond, Label* where); 240 void set_mdp_flag_at(Register mdp_in, int flag_constant); 241 void test_mdp_data_at(Register mdp_in, int offset, Register value, 242 Register test_value_out, 243 Label& not_equal_continue); 244 245 void record_klass_in_profile(Register receiver, Register mdp, 246 Register reg2, bool is_virtual_call); 247 void record_klass_in_profile_helper(Register receiver, Register mdp, 248 Register reg2, int start_row, 249 Label& done, bool is_virtual_call); 250 void record_item_in_profile_helper(Register item, Register mdp, 251 Register reg2, int start_row, Label& done, int total_rows, 252 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn, 253 int non_profiled_offset); 254 255 void update_mdp_by_offset(Register mdp_in, int offset_of_offset); 256 void update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp); 257 void update_mdp_by_constant(Register mdp_in, int constant); 258 void update_mdp_for_ret(Register return_bci); 259 260 void profile_taken_branch(Register mdp, Register bumped_count); 261 void profile_not_taken_branch(Register mdp); 262 void profile_call(Register mdp); 263 void profile_final_call(Register mdp); 264 void profile_virtual_call(Register receiver, Register mdp, 265 Register scratch2, 266 bool receiver_can_be_null = false); 267 void profile_called_method(Register method, Register mdp, Register reg2) NOT_JVMCI_RETURN; 268 void profile_ret(Register return_bci, Register mdp); 269 void profile_null_seen(Register mdp); 270 void profile_typecheck(Register mdp, Register klass, Register scratch); 271 void profile_typecheck_failed(Register mdp); 272 void profile_switch_default(Register mdp); 273 void profile_switch_case(Register index_in_scratch, Register mdp, 274 Register scratch2); 275 276 // Debugging 277 // only if +VerifyOops && state == atos 278 void verify_oop(Register reg, TosState state = atos); 279 // only if +VerifyFPU && (state == ftos || state == dtos) 280 void verify_FPU(int stack_depth, TosState state = ftos); 281 282 typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode; 283 284 // support for jvmti/dtrace 285 void notify_method_entry(); 286 void notify_method_exit(TosState state, NotifyMethodExitMode mode); 287 288 private: 289 290 Register _locals_register; // register that contains the pointer to the locals 291 Register _bcp_register; // register that contains the bcp 292 293 public: 294 void profile_obj_type(Register obj, const Address& mdo_addr); 295 void profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual); 296 void profile_return_type(Register mdp, Register ret, Register tmp); 297 void profile_parameters_type(Register mdp, Register tmp1, Register tmp2); 298 299 }; 300 301 #endif // CPU_X86_VM_INTERP_MASM_X86_HPP 302